diff --git a/bower.json b/bower.json
index f9d7f0ee..d2c37bc2 100644
--- a/bower.json
+++ b/bower.json
@@ -1,7 +1,7 @@
 {
   "name": "angular-ui-scroll",
   "description": "AngularJS infinite scrolling module",
-  "version": "1.7.2",
+  "version": "1.8.0-rc",
   "main": "./dist/ui-scroll.js",
   "homepage": "https://github.com/angular-ui/ui-scroll.git",
   "license": "MIT",
diff --git a/demo/serviceDatasource/serviceDatasource.html b/demo/serviceDatasource/serviceDatasource.html
index 030ac514..a3744d2d 100644
--- a/demo/serviceDatasource/serviceDatasource.html
+++ b/demo/serviceDatasource/serviceDatasource.html
@@ -39,10 +39,14 @@ <h1 class="page-header page-header-exapmle">Datasource as service</h1>
 		</div>
 
 		<div class="viewport" id="viewport-serviceDatasource" ui-scroll-viewport>
-			<div class="item" ui-scroll="item in datasource">{{item}}</div>
+			<div class="item" ui-scroll="item in datasource">
+				<div ng-if="$index%10 === 0 && $index%20 !== 0">{{item}} ************ {{$index}}</div>
+				<div ng-if="$index%10 === 0 && $index%20 === 0">{{item}} ************ {{$index}} OOOOOOOOOOOO </div>
+				<div ng-if="$index%10 !== 0">{{item}}</div>
+			</div>
 		</div>
 
 	</div>
 
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/demo/serviceDatasource/serviceDatasource.js b/demo/serviceDatasource/serviceDatasource.js
index b8eab711..92b31b2c 100644
--- a/demo/serviceDatasource/serviceDatasource.js
+++ b/demo/serviceDatasource/serviceDatasource.js
@@ -9,7 +9,7 @@ angular.module('application', ['ui.scroll'])
 						result.push("item #" + i);
 					}
 					success(result);
-				}, 100);
+				}, 700);
 			};
 
 			return {
diff --git a/dist/ui-scroll-grid.js b/dist/ui-scroll-grid.js
index f930ebbe..43a32ea3 100644
--- a/dist/ui-scroll-grid.js
+++ b/dist/ui-scroll-grid.js
@@ -1,7 +1,7 @@
 /*!
  * angular-ui-scroll
  * https://github.com/angular-ui/ui-scroll
- * Version: 1.7.2 -- 2018-07-26T04:32:37.367Z
+ * Version: 1.8.0-rc -- 2018-08-13T12:05:10.496Z
  * License: MIT
  */
 /******/ (function(modules) { // webpackBootstrap
diff --git a/dist/ui-scroll-grid.js.map b/dist/ui-scroll-grid.js.map
index 5c6464f6..c359203b 100644
--- a/dist/ui-scroll-grid.js.map
+++ b/dist/ui-scroll-grid.js.map
@@ -1 +1 @@
-{"version":3,"sources":["webpack:///webpack/bootstrap 8c9f7d12571bf2ad3771","webpack:///./src/ui-scroll-grid.js"],"names":["angular","module","directive","console","$timeout","GridAdapter","controller","getLayout","applyLayout","layout","columnFromPoint","x","y","Object","defineProperty","get","getColumns","ColumnAdapter","column","css","attr","arguments","value","length","header","forEachRow","row","id","moveBefore","index","exchangeWith","ColumnController","columns","mapTo","extend","applyCss","target","moveLast","insidePoint","result","element","offset","left","outerWidth","top","outerHeight","detach","before","parent","append","removeAttr","hasOwnProperty","GridController","scrollViewport","rowMap","Map","adapter","publicContext","gridAdapter","transform","scope","item","registerColumn","push","registerCell","cell","set","unregisterCell","i","indexOf","splice","delete","callback","forEach","slice","sort","a","b","layouts","Error","map","selected","columnId","next","c","find","col","undefined","visible","require","restrict","link","$scope","$attr","controllers","gridController","tdInitializer","uiScrollTdInitializer","linking","$on","onLink"],"mappings":";;;;;;;AAAA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AAEA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;;;AAGA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,aAAK;AACL;AACA;;AAEA;AACA;AACA;AACA,mCAA2B,0BAA0B,EAAE;AACvD,yCAAiC,eAAe;AAChD;AACA;AACA;;AAEA;AACA,8DAAsD,+DAA+D;;AAErH;AACA;;AAEA;AACA;;;;;;;;;;;AC7DAA,QAAQC,MAAR,CAAe,gBAAf,EAAiC,EAAjC,EACGC,SADH,CACa,YADb,EAC2B,CAAC,MAAD,EAAS,UAAT,EAAqB,UAASC,OAAT,EAAkBC,QAAlB,EAA4B;;AAExE,WAASC,WAAT,CAAqBC,UAArB,EAAiC;;AAE/B,SAAKC,SAAL,GAAiB;AAAA,aAAMD,WAAWC,SAAX,EAAN;AAAA,KAAjB;;AAEA,SAAKC,WAAL,GAAmB,UAACC,MAAD;AAAA,aAAYH,WAAWE,WAAX,CAAuBC,MAAvB,CAAZ;AAAA,KAAnB;;AAEA,SAAKC,eAAL,GAAuB,UAACC,CAAD,EAAIC,CAAJ;AAAA,aAAUN,WAAWI,eAAX,CAA2BC,CAA3B,EAA8BC,CAA9B,CAAV;AAAA,KAAvB;;AAEAC,WAAOC,cAAP,CAAsB,IAAtB,EAA4B,SAA5B,EAAuC,EAAEC,KAAK;AAAA,eAAMT,WAAWU,UAAX,EAAN;AAAA,OAAP,EAAvC;AACD;;AAED,WAASC,aAAT,CAAuBX,UAAvB,EAAmCY,MAAnC,EAA2C;;AAEzC,SAAKC,GAAL,GAAW,YAAU,iBAAoB;AACvC,UAAIC,OAAOC,UAAU,CAAV,CAAX;AACA,UAAIC,QAAQD,UAAU,CAAV,CAAZ;AACA,UAAIA,UAAUE,MAAV,IAAoB,CAAxB,EAA2B;AACzB,eAAOL,OAAOM,MAAP,CAAcL,GAAd,CAAkBC,IAAlB,CAAP;AACD;AACD,UAAIC,UAAUE,MAAV,IAAoB,CAAxB,EAA2B;AACzBL,eAAOM,MAAP,CAAcL,GAAd,CAAkBC,IAAlB,EAAwBE,KAAxB;AACAhB,mBAAWmB,UAAX,CAAsB,UAACC,GAAD;AAAA,iBAASA,IAAIR,OAAOS,EAAX,EAAeR,GAAf,CAAmBC,IAAnB,EAAyBE,KAAzB,CAAT;AAAA,SAAtB;AACAJ,eAAOC,GAAP,CAAWC,IAAX,IAAmBE,KAAnB;AACD;AACF,KAXD;;AAaA,SAAKM,UAAL,GAAkB,UAACC,KAAD;AAAA,aAAWvB,WAAWsB,UAAX,CAAsBV,MAAtB,EAA8BW,KAA9B,CAAX;AAAA,KAAlB;;AAEA,SAAKC,YAAL,GAAoB,UAACD,KAAD;AAAA,aAAWvB,WAAWwB,YAAX,CAAwBZ,MAAxB,EAAgCW,KAAhC,CAAX;AAAA,KAApB;;AAEAhB,WAAOC,cAAP,CAAsB,IAAtB,EAA4B,UAA5B,EAAwC,EAAEC,KAAK;AAAA,eAAMG,OAAOS,EAAb;AAAA,OAAP,EAAxC;AACD;;AAED,WAASI,gBAAT,CAA0BzB,UAA1B,EAAsC0B,OAAtC,EAA+CR,MAA/C,EAAuD;;AAErD,SAAKA,MAAL,GAAcA,MAAd;AACA,SAAKL,GAAL,GAAW,EAAX;AACA,SAAKc,KAAL,GAAaD,QAAQT,MAArB;AACA,SAAKI,EAAL,GAAUK,QAAQT,MAAlB;;AAEA;;AAEA,SAAKf,WAAL,GAAmB,UAASC,MAAT,EAAiB;AAClC,WAAKU,GAAL,GAAWnB,QAAQkC,MAAR,CAAe,EAAf,EAAmBzB,OAAOU,GAA1B,CAAX;AACA,WAAKc,KAAL,GAAaxB,OAAOwB,KAApB;AACAE,eAAS,KAAKX,MAAd,EAAsB,KAAKL,GAA3B;AACD,KAJD;;AAMA,SAAKS,UAAL,GAAkB,UAASQ,MAAT,EAAiB;AAAA;;AACjC,UAAIA,MAAJ,EAAY;AACVR,mBAAWJ,MAAX,EAAmBY,OAAOZ,MAA1B;AACAlB,mBAAWmB,UAAX,CAAsB,UAACC,GAAD;AAAA,iBAASE,WAAWF,IAAI,MAAKC,EAAT,CAAX,EAAyBD,IAAIU,OAAOT,EAAX,CAAzB,CAAT;AAAA,SAAtB;AACD,OAHD,MAGO;AACLU,iBAASb,MAAT;AACAlB,mBAAWmB,UAAX,CAAsB,UAACC,GAAD;AAAA,iBAASW,SAASX,IAAI,MAAKC,EAAT,CAAT,CAAT;AAAA,SAAtB;AACD;AACF,KARD;;AAUA,SAAKjB,eAAL,GAAuB,UAASC,CAAT,EAAYC,CAAZ,EAAe;AAAA;;AACpC,UAAI0B,YAAYd,MAAZ,EAAoBb,CAApB,EAAuBC,CAAvB,CAAJ,EAA+B;AAC7B,eAAO,IAAP;AACD;AACD,UAAI2B,SAAS,IAAb;AACAjC,iBAAWmB,UAAX,CAAsB,UAACC,GAAD;AAAA,eACpBa,SAASD,YAAYZ,IAAI,OAAKC,EAAT,CAAZ,EAA0BhB,CAA1B,EAA6BC,CAA7B,IAAkC,MAAlC,GAAyC2B,MAD9B;AAAA,OAAtB;AAGA,aAAOA,MAAP;AACD,KATD;;AAWA,SAAKJ,QAAL,GAAgB,UAASC,MAAT,EAAiB;AAC/BD,eAASC,MAAT,EAAiB,KAAKjB,GAAtB;AACD,KAFD;;AAIA;;AAEA,aAASmB,WAAT,CAAqBE,OAArB,EAA8B7B,CAA9B,EAAiCC,CAAjC,EAAoC;AAClC,UAAI6B,SAASD,QAAQC,MAAR,EAAb;AACA,UAAI9B,IAAI8B,OAAOC,IAAX,IAAmBD,OAAOC,IAAP,GAAcF,QAAQG,UAAR,CAAmB,IAAnB,CAAd,GAAyChC,CAAhE,EACE,OAAO,KAAP;AACF,UAAIC,IAAI6B,OAAOG,GAAX,IAAkBH,OAAOG,GAAP,GAAaJ,QAAQK,WAAR,CAAoB,IAApB,CAAb,GAAyCjC,CAA/D,EACE,OAAO,KAAP;AACF,aAAO,IAAP;AACD;;AAED,aAASgB,UAAT,CAAoBY,OAApB,EAA6BJ,MAA7B,EAAqC;AACnCI,cAAQM,MAAR;AACAV,aAAOW,MAAP,CAAcP,OAAd;AACD;;AAED,aAASH,QAAT,CAAkBG,OAAlB,EAA2B;AACzB,UAAIQ,SAASR,QAAQQ,MAAR,EAAb;AACAR,cAAQM,MAAR;AACAE,aAAOC,MAAP,CAAcT,OAAd;AACD;;AAED,aAASL,QAAT,CAAkBC,MAAlB,EAA0BjB,GAA1B,EAA+B;AAC7BiB,aAAOc,UAAP,CAAkB,OAAlB;AACA,WAAK,IAAI9B,IAAT,IAAiBD,GAAjB,EAAsB;AACpB,YAAIA,IAAIgC,cAAJ,CAAmB/B,IAAnB,CAAJ,EAA8B;AAC5BgB,iBAAOjB,GAAP,CAAWC,IAAX,EAAiBD,IAAIC,IAAJ,CAAjB;AACD;AACF;AACF;AAEF;;AAED,WAASgC,cAAT,CAAwBC,cAAxB,EAAwC;AAAA;;AACtC,QAAIrB,UAAU,EAAd;AACA,QAAIsB,SAAS,IAAIC,GAAJ,EAAb;;AAEAnD,aAAS,YAAM;AACbiD,qBAAeG,OAAf,CAAuBC,aAAvB,CAAqCC,WAArC,GAAmD,IAAIrD,WAAJ,CAAgB,MAAhB,CAAnD;AACAgD,qBAAeG,OAA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controller.moveBefore(column, index);\n\n      this.exchangeWith = (index) => controller.exchangeWith(column, index);\n\n      Object.defineProperty(this, 'columnId', { get: () => column.id });\n    }\n\n    function ColumnController(controller, columns, header) {\n\n      this.header = header;\n      this.css = {};\n      this.mapTo = columns.length;\n      this.id = columns.length;\n\n      // controller api methods\n\n      this.applyLayout = function(layout) {\n        this.css = angular.extend({}, layout.css);\n        this.mapTo = layout.mapTo;\n        applyCss(this.header, this.css);\n      };\n\n      this.moveBefore = function(target) {\n        if (target) {\n          moveBefore(header, target.header);\n          controller.forEachRow((row) => moveBefore(row[this.id], row[target.id]));\n        } else {\n          moveLast(header);\n          controller.forEachRow((row) => moveLast(row[this.id]));\n        }\n      };\n\n      this.columnFromPoint = function(x, y) {\n        if (insidePoint(header, x, y)) {\n          return this;\n        }\n        let result = null;\n        controller.forEachRow((row) =>\n          result = insidePoint(row[this.id], x, y) ? this : result\n        );\n        return result;\n      };\n\n      this.applyCss = function(target) {\n        applyCss(target, this.css);\n      };\n\n      // function definitions\n\n      function insidePoint(element, x, y) {\n        let offset = element.offset();\n        if (x < offset.left || offset.left + element.outerWidth(true) < x)\n          return false;\n        if (y < offset.top || offset.top + element.outerHeight(true) < y)\n          return false;\n        return true;\n      }\n\n      function moveBefore(element, target) {\n        element.detach();\n        target.before(element);\n      }\n\n      function moveLast(element) {\n        let parent = element.parent();\n        element.detach();\n        parent.append(element);\n      }\n\n      function applyCss(target, css) {\n        target.removeAttr('style');\n        for (let attr in css) {\n          if (css.hasOwnProperty(attr)) {\n            target.css(attr, css[attr]);\n          }\n        }\n      }\n\n    }\n\n    function GridController(scrollViewport) {\n      let columns = [];\n      let rowMap = new Map();\n\n      $timeout(() => {\n        scrollViewport.adapter.publicContext.gridAdapter = new GridAdapter(this);\n        scrollViewport.adapter.transform = (scope, item) => transform(rowMap.get(scope), item);\n      });\n\n      this.registerColumn = function(header) {\n        columns.push(new ColumnController(this, columns, header));\n      };\n\n      this.registerCell = function(scope, cell) {\n        let row = rowMap.get(scope);\n        if (!row) {\n          row = [];\n          rowMap.set(scope, row);\n        }\n        if (row.length >= columns.length) {\n          return false;\n        }\n        row.push(cell);\n        return true;\n      };\n\n      this.unregisterCell = function(scope, cell) {\n        let row = rowMap.get(scope);\n        let i = row.indexOf(cell);\n        row.splice(i, 1);\n        if (!row.length) {\n          rowMap.delete(scope);\n        }\n      };\n\n      this.forEachRow = function(callback) {\n        rowMap.forEach(callback);\n      };\n\n      this.getColumns = function() {\n        let result = [];\n        columns.slice()\n          .sort((a, b) => a.mapTo - b.mapTo)\n          .forEach((column) => result.push(new ColumnAdapter(this, column)));\n        return result;\n      };\n\n      this.getLayout = function() {\n        let result = [];\n        columns.forEach((column, index) => result.push({\n          index: index,\n          css: angular.extend({}, column.css),\n          mapTo: column.mapTo\n        }));\n        return result;\n      };\n\n      this.applyLayout = function(layouts) {\n        if (!layouts || layouts.length != columns.length) {\n          throw new Error('Failed to apply layout - number of layouts should match number of columns');\n        }\n        layouts.forEach((layout, index) => columns[index].applyLayout(layout));\n        transform(columns.map((column) => column.header));\n        rowMap.forEach((row) => transform(row));\n      };\n\n      this.moveBefore = function(selected, target) {\n        let index = target;\n\n        if (target % 1 !== 0) {\n          index = target ? columns[target.columnId].mapTo : columns.length;\n        }\n        if (index < 0 || index > columns.length) {\n          return; // throw an error?\n        }\n\n        let mapTo = selected.mapTo,\n          next = null;\n        index -= mapTo < index ? 1 : 0;\n\n        columns.forEach(c => {\n          c.mapTo -= c.mapTo > mapTo ? 1 : 0;\n          c.mapTo += c.mapTo >= index ? 1 : 0;\n          next = c.mapTo === index + 1 ? c : next;\n        });\n\n        selected.mapTo = index;\n        selected.moveBefore(next);\n      };\n\n      this.exchangeWith = function(selected, index) {\n        if (index < 0 || index >= columns.length) {\n          return;\n        }\n        columns.find(c => c.mapTo === index).mapTo = selected.mapTo;\n        selected.mapTo = index;\n      };\n\n      this.columnFromPoint = function(x, y) {\n        let column = columns.find(col => col.columnFromPoint(x, y));\n        return column ? new ColumnAdapter(this, column) : undefined;\n      };\n\n      // function definitions\n\n      function transform(row) {\n        let parent = row[0].parent();\n        let visible = [];\n\n        row.forEach((cell, index) => {\n          columns[index].applyCss(cell);\n          visible[columns[index].mapTo] = row[index];\n          row[index].detach();\n        });\n\n        visible.forEach(cell => parent.append(cell));\n      }\n\n    }\n\n    return {\n      require: ['^^uiScrollViewport'],\n      restrict: 'A',\n      link: ($scope, element, $attr, controllers) => {\n        controllers[0].gridController = controllers[0].gridController || new GridController(controllers[0]);\n        controllers[0].gridController.registerColumn(element);\n      }\n    };\n  }])\n\n.directive('uiScrollTd', function() {\n  return {\n    require: ['?^^uiScrollViewport'],\n    restrict: 'A',\n    link: ($scope, element, $attr, controllers) => {\n      if (!controllers[0]) {\n        return;\n      }\n      let scope = $scope;\n      let tdInitializer = $scope.uiScrollTdInitializer;\n      if (!tdInitializer) {\n        tdInitializer = $scope.uiScrollTdInitializer = {\n          linking: true\n        };\n      }\n      if (!tdInitializer.linking) {\n        scope = tdInitializer.scope;\n      }\n      let gridController = controllers[0].gridController;\n      if (gridController.registerCell(scope, element)) {\n        $scope.$on('$destroy', () => gridController.unregisterCell(scope, element));\n      }\n      if (!tdInitializer.linking) {\n        tdInitializer.onLink();\n      }\n    }\n  };\n});\n\n\n\n// WEBPACK FOOTER //\n// ./src/ui-scroll-grid.js"],"sourceRoot":""}
\ No newline at end of file
diff --git a/dist/ui-scroll-grid.min.js b/dist/ui-scroll-grid.min.js
index 40515a6d..00c8a6ce 100644
--- a/dist/ui-scroll-grid.min.js
+++ b/dist/ui-scroll-grid.min.js
@@ -1,7 +1,7 @@
 /*!
  * angular-ui-scroll
  * https://github.com/angular-ui/ui-scroll
- * Version: 1.7.2 -- 2018-07-26T04:32:37.367Z
+ * Version: 1.8.0-rc -- 2018-08-13T12:05:10.496Z
  * License: MIT
  */
 !function(t){function n(e){if(r[e])return r[e].exports;var o=r[e]={i:e,l:!1,exports:{}};return t[e].call(o.exports,o,o.exports,n),o.l=!0,o.exports}var r={};n.m=t,n.c=r,n.d=function(t,r,e){n.o(t,r)||Object.defineProperty(t,r,{configurable:!1,enumerable:!0,get:e})},n.n=function(t){var r=t&&t.__esModule?function(){return t.default}:function(){return t};return n.d(r,"a",r),r},n.o=function(t,n){return Object.prototype.hasOwnProperty.call(t,n)},n.p="",n(n.s=7)}({7:function(t,n,r){"use strict";angular.module("ui.scroll.grid",[]).directive("uiScrollTh",["$log","$timeout",function(t,n){function r(t){this.getLayout=function(){return t.getLayout()},this.applyLayout=function(n){return t.applyLayout(n)},this.columnFromPoint=function(n,r){return t.columnFromPoint(n,r)},Object.defineProperty(this,"columns",{get:function(){return t.getColumns()}})}function e(t,n){this.css=function(){var r=arguments[0],e=arguments[1];if(1==arguments.length)return n.header.css(r);2==arguments.length&&(n.header.css(r,e),t.forEachRow(function(t){return t[n.id].css(r,e)}),n.css[r]=e)},this.moveBefore=function(r){return t.moveBefore(n,r)},this.exchangeWith=function(r){return t.exchangeWith(n,r)},Object.defineProperty(this,"columnId",{get:function(){return n.id}})}function o(t,n,r){function e(t,n,r){var e=t.offset();return!(n<e.left||e.left+t.outerWidth(!0)<n)&&!(r<e.top||e.top+t.outerHeight(!0)<r)}function o(t,n){t.detach(),n.before(t)}function i(t){var n=t.parent();t.detach(),n.append(t)}function u(t,n){t.removeAttr("style");for(var r in n)n.hasOwnProperty(r)&&t.css(r,n[r])}this.header=r,this.css={},this.mapTo=n.length,this.id=n.length,this.applyLayout=function(t){this.css=angular.extend({},t.css),this.mapTo=t.mapTo,u(this.header,this.css)},this.moveBefore=function(n){var e=this;n?(o(r,n.header),t.forEachRow(function(t){return o(t[e.id],t[n.id])})):(i(r),t.forEachRow(function(t){return i(t[e.id])}))},this.columnFromPoint=function(n,o){var i=this;if(e(r,n,o))return this;var u=null;return t.forEachRow(function(t){return u=e(t[i.id],n,o)?i:u}),u},this.applyCss=function(t){u(t,this.css)}}function i(t){function i(t){var n=t[0].parent(),r=[];t.forEach(function(n,e){c[e].applyCss(n),r[c[e].mapTo]=t[e],t[e].detach()}),r.forEach(function(t){return n.append(t)})}var u=this,c=[],a=new Map;n(function(){t.adapter.publicContext.gridAdapter=new r(u),t.adapter.transform=function(t,n){return i(a.get(t))}}),this.registerColumn=function(t){c.push(new o(this,c,t))},this.registerCell=function(t,n){var r=a.get(t);return r||(r=[],a.set(t,r)),!(r.length>=c.length)&&(r.push(n),!0)},this.unregisterCell=function(t,n){var r=a.get(t),e=r.indexOf(n);r.splice(e,1),r.length||a.delete(t)},this.forEachRow=function(t){a.forEach(t)},this.getColumns=function(){var t=this,n=[];return c.slice().sort(function(t,n){return t.mapTo-n.mapTo}).forEach(function(r){return n.push(new e(t,r))}),n},this.getLayout=function(){var t=[];return c.forEach(function(n,r){return t.push({index:r,css:angular.extend({},n.css),mapTo:n.mapTo})}),t},this.applyLayout=function(t){if(!t||t.length!=c.length)throw new Error("Failed to apply layout - number of layouts should match number of columns");t.forEach(function(t,n){return c[n].applyLayout(t)}),i(c.map(function(t){return t.header})),a.forEach(function(t){return i(t)})},this.moveBefore=function(t,n){var r=n;if(n%1!=0&&(r=n?c[n.columnId].mapTo:c.length),!(r<0||r>c.length)){var e=t.mapTo,o=null;r-=e<r?1:0,c.forEach(function(t){t.mapTo-=t.mapTo>e?1:0,t.mapTo+=t.mapTo>=r?1:0,o=t.mapTo===r+1?t:o}),t.mapTo=r,t.moveBefore(o)}},this.exchangeWith=function(t,n){n<0||n>=c.length||(c.find(function(t){return t.mapTo===n}).mapTo=t.mapTo,t.mapTo=n)},this.columnFromPoint=function(t,n){var r=c.find(function(r){return r.columnFromPoint(t,n)});return r?new e(this,r):void 0}}return{require:["^^uiScrollViewport"],restrict:"A",link:function(t,n,r,e){e[0].gridController=e[0].gridController||new i(e[0]),e[0].gridController.registerColumn(n)}}}]).directive("uiScrollTd",function(){return{require:["?^^uiScrollViewport"],restrict:"A",link:function(t,n,r,e){if(e[0]){var o=t,i=t.uiScrollTdInitializer;i||(i=t.uiScrollTdInitializer={linking:!0}),i.linking||(o=i.scope);var u=e[0].gridController;u.registerCell(o,n)&&t.$on("$destroy",function(){return u.unregisterCell(o,n)}),i.linking||i.onLink()}}}})}});
diff --git a/dist/ui-scroll-grid.min.js.map b/dist/ui-scroll-grid.min.js.map
index c86fc7eb..c1b801a0 100644
--- a/dist/ui-scroll-grid.min.js.map
+++ b/dist/ui-scroll-grid.min.js.map
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row.indexOf(cell);\n      row.splice(i, 1);\n      if (!row.length) {\n        rowMap.delete(scope);\n      }\n    };\n\n    this.forEachRow = function (callback) {\n      rowMap.forEach(callback);\n    };\n\n    this.getColumns = function () {\n      var _this4 = this;\n\n      var result = [];\n      columns.slice().sort(function (a, b) {\n        return a.mapTo - b.mapTo;\n      }).forEach(function (column) {\n        return result.push(new ColumnAdapter(_this4, column));\n      });\n      return result;\n    };\n\n    this.getLayout = function () {\n      var result = [];\n      columns.forEach(function (column, index) {\n        return result.push({\n          index: index,\n          css: angular.extend({}, column.css),\n          mapTo: column.mapTo\n        });\n      });\n      return result;\n    };\n\n    this.applyLayout = function (layouts) {\n      if (!layouts || layouts.length != columns.length) {\n        throw new Error('Failed to apply layout - number of layouts 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};\n\n    this.exchangeWith = function (selected, index) {\n      if (index < 0 || index >= columns.length) {\n        return;\n      }\n      columns.find(function (c) {\n        return c.mapTo === index;\n      }).mapTo = selected.mapTo;\n      selected.mapTo = index;\n    };\n\n    this.columnFromPoint = function (x, y) {\n      var column = columns.find(function (col) {\n        return col.columnFromPoint(x, y);\n      });\n      return column ? new ColumnAdapter(this, column) : undefined;\n    };\n\n    // function definitions\n\n    function transform(row) {\n      var parent = row[0].parent();\n      var visible = [];\n\n      row.forEach(function (cell, index) {\n        columns[index].applyCss(cell);\n        visible[columns[index].mapTo] = row[index];\n        row[index].detach();\n      });\n\n      visible.forEach(function (cell) {\n        return parent.append(cell);\n      });\n    }\n  }\n\n  return {\n    require: ['^^uiScrollViewport'],\n    restrict: 'A',\n    link: 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expose the modules object (__webpack_modules__)\n/******/ \t__webpack_require__.m = modules;\n/******/\n/******/ \t// expose the module cache\n/******/ \t__webpack_require__.c = installedModules;\n/******/\n/******/ \t// define getter function for harmony exports\n/******/ \t__webpack_require__.d = function(exports, name, getter) {\n/******/ \t\tif(!__webpack_require__.o(exports, name)) {\n/******/ \t\t\tObject.defineProperty(exports, name, {\n/******/ \t\t\t\tconfigurable: false,\n/******/ \t\t\t\tenumerable: true,\n/******/ \t\t\t\tget: getter\n/******/ \t\t\t});\n/******/ \t\t}\n/******/ \t};\n/******/\n/******/ \t// getDefaultExport function for compatibility with non-harmony modules\n/******/ \t__webpack_require__.n = function(module) {\n/******/ \t\tvar getter = module && module.__esModule ?\n/******/ \t\t\tfunction getDefault() { return module['default']; } :\n/******/ \t\t\tfunction getModuleExports() { return module; };\n/******/ \t\t__webpack_require__.d(getter, 'a', 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};\n\n    this.columnFromPoint = function (x, y) {\n      return controller.columnFromPoint(x, y);\n    };\n\n    Object.defineProperty(this, 'columns', { get: function get() {\n        return controller.getColumns();\n      } });\n  }\n\n  function ColumnAdapter(controller, column) {\n\n    this.css = function () /* attr, value */{\n      var attr = arguments[0];\n      var value = arguments[1];\n      if (arguments.length == 1) {\n        return column.header.css(attr);\n      }\n      if (arguments.length == 2) {\n        column.header.css(attr, value);\n        controller.forEachRow(function (row) {\n          return row[column.id].css(attr, value);\n        });\n        column.css[attr] = value;\n      }\n    };\n\n    this.moveBefore = function (index) {\n      return controller.moveBefore(column, index);\n    };\n\n    this.exchangeWith = function (index) {\n      return controller.exchangeWith(column, index);\n    };\n\n    Object.defineProperty(this, 'columnId', { get: function get() {\n        return column.id;\n      } });\n  }\n\n  function ColumnController(controller, columns, header) {\n\n    this.header = header;\n    this.css = {};\n    this.mapTo = columns.length;\n    this.id = columns.length;\n\n    // controller api methods\n\n    this.applyLayout = function (layout) {\n      this.css = angular.extend({}, layout.css);\n      this.mapTo = layout.mapTo;\n      applyCss(this.header, this.css);\n    };\n\n    this.moveBefore = function (target) {\n      var _this = this;\n\n      if (target) {\n        moveBefore(header, target.header);\n        controller.forEachRow(function (row) {\n          return moveBefore(row[_this.id], row[target.id]);\n        });\n      } else {\n        moveLast(header);\n        controller.forEachRow(function (row) {\n          return moveLast(row[_this.id]);\n        });\n      }\n    };\n\n    this.columnFromPoint = function (x, y) {\n      var _this2 = this;\n\n      if (insidePoint(header, x, y)) {\n        return this;\n      }\n      var result = null;\n      controller.forEachRow(function (row) {\n        return result = insidePoint(row[_this2.id], x, y) ? _this2 : result;\n      });\n      return result;\n    };\n\n    this.applyCss = function (target) {\n      applyCss(target, this.css);\n    };\n\n    // function definitions\n\n    function insidePoint(element, x, y) {\n      var offset = element.offset();\n      if (x < offset.left || offset.left + element.outerWidth(true) < x) return false;\n      if (y < offset.top || offset.top + element.outerHeight(true) < y) return false;\n      return true;\n    }\n\n    function moveBefore(element, target) {\n      element.detach();\n      target.before(element);\n    }\n\n    function moveLast(element) {\n      var parent = element.parent();\n      element.detach();\n      parent.append(element);\n    }\n\n    function applyCss(target, css) {\n      target.removeAttr('style');\n      for (var attr in css) {\n        if (css.hasOwnProperty(attr)) {\n          target.css(attr, css[attr]);\n        }\n      }\n    }\n  }\n\n  function GridController(scrollViewport) {\n    var _this3 = this;\n\n    var columns = [];\n    var rowMap = new Map();\n\n    $timeout(function () {\n      scrollViewport.adapter.publicContext.gridAdapter = new GridAdapter(_this3);\n      scrollViewport.adapter.transform = function (scope, item) {\n        return transform(rowMap.get(scope), item);\n      };\n    });\n\n    this.registerColumn = function (header) {\n      columns.push(new ColumnController(this, columns, header));\n    };\n\n    this.registerCell = function (scope, cell) {\n      var row = rowMap.get(scope);\n      if (!row) {\n        row = [];\n        rowMap.set(scope, row);\n      }\n      if (row.length >= columns.length) {\n        return false;\n      }\n      row.push(cell);\n      return true;\n    };\n\n    this.unregisterCell = function (scope, cell) {\n      var row = rowMap.get(scope);\n      var i = row.indexOf(cell);\n      row.splice(i, 1);\n      if (!row.length) {\n        rowMap.delete(scope);\n      }\n    };\n\n    this.forEachRow = function (callback) {\n      rowMap.forEach(callback);\n    };\n\n    this.getColumns = function () {\n      var _this4 = this;\n\n      var result = [];\n      columns.slice().sort(function (a, b) {\n        return a.mapTo - b.mapTo;\n      }).forEach(function (column) {\n        return result.push(new ColumnAdapter(_this4, column));\n      });\n      return result;\n    };\n\n    this.getLayout = function () {\n      var result = [];\n      columns.forEach(function (column, index) {\n        return result.push({\n          index: index,\n          css: angular.extend({}, column.css),\n          mapTo: column.mapTo\n        });\n      });\n      return result;\n    };\n\n    this.applyLayout = function (layouts) {\n      if (!layouts || layouts.length != columns.length) {\n        throw new Error('Failed to apply layout - number of layouts should match number of columns');\n      }\n      layouts.forEach(function (layout, index) {\n        return columns[index].applyLayout(layout);\n      });\n      transform(columns.map(function (column) {\n        return column.header;\n      }));\n      rowMap.forEach(function (row) {\n        return transform(row);\n      });\n    };\n\n    this.moveBefore = function (selected, target) {\n      var index = target;\n\n      if (target % 1 !== 0) {\n        index = target ? columns[target.columnId].mapTo : columns.length;\n      }\n      if (index < 0 || index > columns.length) {\n        return; // throw an error?\n      }\n\n      var mapTo = selected.mapTo,\n          next = null;\n      index -= mapTo < index ? 1 : 0;\n\n      columns.forEach(function (c) {\n        c.mapTo -= c.mapTo > mapTo ? 1 : 0;\n        c.mapTo += c.mapTo >= index ? 1 : 0;\n        next = c.mapTo === index + 1 ? c : next;\n      });\n\n      selected.mapTo = index;\n      selected.moveBefore(next);\n    };\n\n    this.exchangeWith = function (selected, index) {\n      if (index < 0 || index >= columns.length) {\n        return;\n      }\n      columns.find(function (c) {\n        return c.mapTo === index;\n      }).mapTo = selected.mapTo;\n      selected.mapTo = index;\n    };\n\n    this.columnFromPoint = function (x, y) {\n      var column = columns.find(function (col) {\n        return col.columnFromPoint(x, y);\n      });\n      return column ? new ColumnAdapter(this, column) : undefined;\n    };\n\n    // function definitions\n\n    function transform(row) {\n      var parent = row[0].parent();\n      var visible = [];\n\n      row.forEach(function (cell, index) {\n        columns[index].applyCss(cell);\n        visible[columns[index].mapTo] = row[index];\n        row[index].detach();\n      });\n\n      visible.forEach(function (cell) {\n        return parent.append(cell);\n      });\n    }\n  }\n\n  return {\n    require: ['^^uiScrollViewport'],\n    restrict: 'A',\n    link: function link($scope, element, $attr, controllers) {\n      controllers[0].gridController = controllers[0].gridController || new GridController(controllers[0]);\n      controllers[0].gridController.registerColumn(element);\n    }\n  };\n}]).directive('uiScrollTd', function () {\n  return {\n    require: ['?^^uiScrollViewport'],\n    restrict: 'A',\n    link: function link($scope, element, $attr, controllers) {\n      if (!controllers[0]) {\n        return;\n      }\n      var scope = $scope;\n      var tdInitializer = $scope.uiScrollTdInitializer;\n      if (!tdInitializer) {\n        tdInitializer = $scope.uiScrollTdInitializer = {\n          linking: true\n        };\n      }\n      if (!tdInitializer.linking) {\n        scope = tdInitializer.scope;\n      }\n      var gridController = controllers[0].gridController;\n      if (gridController.registerCell(scope, element)) {\n        $scope.$on('$destroy', function () {\n          return gridController.unregisterCell(scope, element);\n        });\n      }\n      if (!tdInitializer.linking) {\n        tdInitializer.onLink();\n      }\n    }\n  };\n});\n\n/***/ })\n\n/******/ });\n\n\n// WEBPACK FOOTER //\n// ui-scroll-grid.min.js"," \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, {\n \t\t\t\tconfigurable: false,\n \t\t\t\tenumerable: true,\n \t\t\t\tget: getter\n \t\t\t});\n \t\t}\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 7);\n\n\n\n// WEBPACK FOOTER //\n// webpack/bootstrap 2386088bf7ce5bf5d4af","angular.module('ui.scroll.grid', [])\n  .directive('uiScrollTh', ['$log', '$timeout', function(console, $timeout) {\n\n    function GridAdapter(controller) {\n\n      this.getLayout = () => controller.getLayout();\n\n      this.applyLayout = (layout) => controller.applyLayout(layout);\n\n      this.columnFromPoint = (x, y) => controller.columnFromPoint(x, y);\n\n      Object.defineProperty(this, 'columns', { get: () => controller.getColumns() });\n    }\n\n    function ColumnAdapter(controller, column) {\n\n      this.css = function( /* attr, value */ ) {\n        var attr = arguments[0];\n        var value = arguments[1];\n        if (arguments.length == 1) {\n          return column.header.css(attr);\n        }\n        if (arguments.length == 2) {\n          column.header.css(attr, value);\n          controller.forEachRow((row) => row[column.id].css(attr, value));\n          column.css[attr] = value;\n        }\n      };\n\n      this.moveBefore = (index) => controller.moveBefore(column, index);\n\n      this.exchangeWith = (index) => controller.exchangeWith(column, index);\n\n      Object.defineProperty(this, 'columnId', { get: () => column.id });\n    }\n\n    function ColumnController(controller, columns, header) {\n\n      this.header = header;\n      this.css = {};\n      this.mapTo = columns.length;\n      this.id = columns.length;\n\n      // controller api methods\n\n      this.applyLayout = function(layout) {\n        this.css = angular.extend({}, layout.css);\n        this.mapTo = layout.mapTo;\n        applyCss(this.header, this.css);\n      };\n\n      this.moveBefore = function(target) {\n        if (target) {\n          moveBefore(header, target.header);\n          controller.forEachRow((row) => moveBefore(row[this.id], row[target.id]));\n        } else {\n          moveLast(header);\n          controller.forEachRow((row) => moveLast(row[this.id]));\n        }\n      };\n\n      this.columnFromPoint = function(x, y) {\n        if (insidePoint(header, x, y)) {\n          return this;\n        }\n        let result = null;\n        controller.forEachRow((row) =>\n          result = insidePoint(row[this.id], x, y) ? this : result\n        );\n        return result;\n      };\n\n      this.applyCss = function(target) {\n        applyCss(target, this.css);\n      };\n\n      // function definitions\n\n      function insidePoint(element, x, y) {\n        let offset = element.offset();\n        if (x < offset.left || offset.left + element.outerWidth(true) < x)\n          return false;\n        if (y < offset.top || offset.top + element.outerHeight(true) < y)\n          return false;\n        return true;\n      }\n\n      function moveBefore(element, target) {\n        element.detach();\n        target.before(element);\n      }\n\n      function moveLast(element) {\n        let parent = element.parent();\n        element.detach();\n        parent.append(element);\n      }\n\n      function applyCss(target, css) {\n        target.removeAttr('style');\n        for (let attr in css) {\n          if (css.hasOwnProperty(attr)) {\n            target.css(attr, css[attr]);\n          }\n        }\n      }\n\n    }\n\n    function GridController(scrollViewport) {\n      let columns = [];\n      let rowMap = new Map();\n\n      $timeout(() => {\n        scrollViewport.adapter.publicContext.gridAdapter = new GridAdapter(this);\n        scrollViewport.adapter.transform = (scope, item) => transform(rowMap.get(scope), item);\n      });\n\n      this.registerColumn = function(header) {\n        columns.push(new ColumnController(this, columns, header));\n      };\n\n      this.registerCell = function(scope, cell) {\n        let row = rowMap.get(scope);\n        if (!row) {\n          row = [];\n          rowMap.set(scope, row);\n        }\n        if (row.length >= columns.length) {\n          return false;\n        }\n        row.push(cell);\n        return true;\n      };\n\n      this.unregisterCell = function(scope, cell) {\n        let row = rowMap.get(scope);\n        let i = row.indexOf(cell);\n        row.splice(i, 1);\n        if (!row.length) {\n          rowMap.delete(scope);\n        }\n      };\n\n      this.forEachRow = function(callback) {\n        rowMap.forEach(callback);\n      };\n\n      this.getColumns = function() {\n        let result = [];\n        columns.slice()\n          .sort((a, b) => a.mapTo - b.mapTo)\n          .forEach((column) => result.push(new ColumnAdapter(this, column)));\n        return result;\n      };\n\n      this.getLayout = function() {\n        let result = [];\n        columns.forEach((column, index) => result.push({\n          index: index,\n          css: angular.extend({}, column.css),\n          mapTo: column.mapTo\n        }));\n        return result;\n      };\n\n      this.applyLayout = function(layouts) {\n        if (!layouts || layouts.length != columns.length) {\n          throw new Error('Failed to apply layout - number of layouts should match number of columns');\n        }\n        layouts.forEach((layout, index) => columns[index].applyLayout(layout));\n        transform(columns.map((column) => column.header));\n        rowMap.forEach((row) => transform(row));\n      };\n\n      this.moveBefore = function(selected, target) {\n        let index = target;\n\n        if (target % 1 !== 0) {\n          index = target ? columns[target.columnId].mapTo : columns.length;\n        }\n        if (index < 0 || index > columns.length) {\n          return; // throw an error?\n        }\n\n        let mapTo = selected.mapTo,\n          next = null;\n        index -= mapTo < index ? 1 : 0;\n\n        columns.forEach(c => {\n          c.mapTo -= c.mapTo > mapTo ? 1 : 0;\n          c.mapTo += c.mapTo >= index ? 1 : 0;\n          next = c.mapTo === index + 1 ? c : next;\n        });\n\n        selected.mapTo = index;\n        selected.moveBefore(next);\n      };\n\n      this.exchangeWith = function(selected, index) {\n        if (index < 0 || index >= columns.length) {\n          return;\n        }\n        columns.find(c => c.mapTo === index).mapTo = selected.mapTo;\n        selected.mapTo = index;\n      };\n\n      this.columnFromPoint = function(x, y) {\n        let column = columns.find(col => col.columnFromPoint(x, y));\n        return column ? new ColumnAdapter(this, column) : undefined;\n      };\n\n      // function definitions\n\n      function transform(row) {\n        let parent = row[0].parent();\n        let visible = [];\n\n        row.forEach((cell, index) => {\n          columns[index].applyCss(cell);\n          visible[columns[index].mapTo] = row[index];\n          row[index].detach();\n        });\n\n        visible.forEach(cell => parent.append(cell));\n      }\n\n    }\n\n    return {\n      require: ['^^uiScrollViewport'],\n      restrict: 'A',\n      link: ($scope, element, $attr, controllers) => {\n        controllers[0].gridController = controllers[0].gridController || new GridController(controllers[0]);\n        controllers[0].gridController.registerColumn(element);\n      }\n    };\n  }])\n\n.directive('uiScrollTd', function() {\n  return {\n    require: ['?^^uiScrollViewport'],\n    restrict: 'A',\n    link: ($scope, element, $attr, controllers) => {\n      if (!controllers[0]) {\n        return;\n      }\n      let scope = $scope;\n      let tdInitializer = $scope.uiScrollTdInitializer;\n      if (!tdInitializer) {\n        tdInitializer = $scope.uiScrollTdInitializer = {\n          linking: true\n        };\n      }\n      if (!tdInitializer.linking) {\n        scope = tdInitializer.scope;\n      }\n      let gridController = controllers[0].gridController;\n      if (gridController.registerCell(scope, element)) {\n        $scope.$on('$destroy', () => gridController.unregisterCell(scope, element));\n      }\n      if (!tdInitializer.linking) {\n        tdInitializer.onLink();\n      }\n    }\n  };\n});\n\n\n\n// WEBPACK FOOTER //\n// ./src/ui-scroll-grid.js"],"sourceRoot":""}
\ No newline at end of file
diff --git a/dist/ui-scroll.js b/dist/ui-scroll.js
index 3a57a096..0b3aa961 100644
--- a/dist/ui-scroll.js
+++ b/dist/ui-scroll.js
@@ -1,7 +1,7 @@
 /*!
  * angular-ui-scroll
  * https://github.com/angular-ui/ui-scroll
- * Version: 1.7.2 -- 2018-07-26T04:32:37.367Z
+ * Version: 1.8.0-rc -- 2018-08-13T12:05:10.496Z
  * License: MIT
  */
 /******/ (function(modules) { // webpackBootstrap
@@ -144,7 +144,7 @@ angular.module('ui.scroll', []).constant('JQLiteExtras', _jqLiteExtras2.default)
 
     var BUFFER_MIN = 3;
     var BUFFER_DEFAULT = 10;
-    var PADDING_MIN = 0.3;
+    var PADDING_MIN = 0.01;
     var PADDING_DEFAULT = 0.5;
     var MAX_VIEWPORT_DELAY = 500;
     var VIEWPORT_POLLING_INTERVAL = 50;
@@ -573,18 +573,40 @@ angular.module('ui.scroll', []).constant('JQLiteExtras', _jqLiteExtras2.default)
       }
     }
 
-    function resizeAndScrollHandler() {
-      if (!$rootScope.$$phase && !adapter.isLoading && !adapter.disabled) {
+    function resizeAndScrollHandler(ev) {
+      if ($rootScope.$$phase || adapter.isLoading || adapter.disabled) {
+        return;
+      }
 
-        enqueueFetch(ridActual);
+      if (ev.type === 'scroll') {
+        // Don't process scroll event if it was triggered by us setting scrollTop.
+        if (viewport[0].scrollTop === viewport.scrollTopValue) {
+          return false;
+        }
 
-        if (pending.length) {
-          unbindEvents();
-        } else {
-          adapter.calculateProperties();
-          !$scope.$$phase && $scope.$digest();
+        // Check if we tried to set scrollTop and it failed. If that happens, don't prepend more items based on the stale value
+        // of scrollTop that will be used by shouldLoadTop(). Also, try to set it again.
+        viewport.scrollTopSetFailed = false;
+        if (viewport.scrollTopValue != null) {
+          var curScrollTop = viewport[0].scrollTop;
+          if (Math.abs(curScrollTop - viewport.scrollTopValue) > Math.abs(curScrollTop - viewport.scrollTopBeforeSet)) {
+            viewport.scrollTopSetFailed = true;
+            viewport.scrollTop(curScrollTop - viewport.scrollTopAdjust);
+          }
         }
       }
+
+      enqueueFetch(ridActual);
+
+      // we got a real scroll event, so browser is now in charge of scrollTop
+      viewport.scrollTopValue = null;
+
+      if (pending.length) {
+        unbindEvents();
+      } else {
+        adapter.calculateProperties();
+        !$scope.$$phase && $scope.$digest();
+      }
     }
 
     function wheelHandler(event) {
@@ -1222,6 +1244,10 @@ function Viewport(elementRoutines, buffer, element, viewportController, $rootSco
     'display': 'block'
   });
 
+  viewport.scrollTopOriginal = viewport.scrollTopOriginal || viewport.scrollTop;
+  viewport.scrollTopBeforeSet = null;
+  viewport.scrollTopValue = null;
+
   function bufferPadding() {
     return viewport.outerHeight() * padding; // some extra space to initiate preload
   }
@@ -1230,6 +1256,13 @@ function Viewport(elementRoutines, buffer, element, viewportController, $rootSco
     getScope: function getScope() {
       return scope;
     },
+    scrollTop: function scrollTop() {
+      if (typeof arguments[0] !== 'undefined') {
+        viewport.scrollTopBeforeSet = viewport.scrollTop();
+        viewport.scrollTopValue = arguments[0];
+      }
+      return viewport.scrollTopOriginal.apply(viewport, arguments);
+    },
     createPaddingElements: function createPaddingElements(template) {
       topPadding = new _padding2.default(template);
       bottomPadding = new _padding2.default(template);
@@ -1295,7 +1328,7 @@ function Viewport(elementRoutines, buffer, element, viewportController, $rootSco
       }
     },
     shouldLoadTop: function shouldLoadTop() {
-      return !buffer.bof && viewport.topDataPos() > viewport.topVisiblePos() - bufferPadding();
+      return !buffer.bof && !viewport.scrollTopSetFailed && viewport.topDataPos() > viewport.topVisiblePos() - bufferPadding();
     },
     clipTop: function clipTop() {
       // clip the invisible items off the top
@@ -1383,6 +1416,7 @@ function Viewport(elementRoutines, buffer, element, viewportController, $rootSco
         topPadding.height(paddingHeight);
       } else {
         topPadding.height(0);
+        viewport.scrollTopAdjust = paddingHeight;
         viewport.scrollTop(viewport.scrollTop() - paddingHeight);
       }
     },
@@ -1590,7 +1624,7 @@ var Adapter = function () {
       var _this = this;
 
       // these methods will be accessible out of ui-scroll via user defined adapter
-      var publicMethods = ['reload', 'applyUpdates', 'append', 'prepend', 'isBOF', 'isEOF', 'isEmpty'];
+      var publicMethods = ['reload', 'applyUpdates', 'append', 'prepend', 'isBOF', 'isEOF', 'isEmpty', 'resetScrollTopCorrection'];
       for (var i = publicMethods.length - 1; i >= 0; i--) {
         this.publicContext[publicMethods[i]] = this[publicMethods[i]].bind(this);
       }
@@ -1649,6 +1683,12 @@ var Adapter = function () {
     value: function isEmpty() {
       return !this.buffer.length;
     }
+  }, {
+    key: 'resetScrollTopCorrection',
+    value: function resetScrollTopCorrection() {
+      // is needed to scroll at negative area programmatically (e.g. tests)
+      this.viewport.scrollTopValue = null;
+    }
   }, {
     key: 'append',
     value: function append(newItems) {
diff --git a/dist/ui-scroll.js.map b/dist/ui-scroll.js.map
index 29c760d0..adcc7550 100644
--- a/dist/ui-scroll.js.map
+++ b/dist/ui-scroll.js.map
@@ -1 +1 @@
-{"version":3,"sources":["webpack:///webpack/bootstrap 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JQLiteExtras from './modules/jqLiteExtras';\nimport ElementRoutines from './modules/elementRoutines.js';\nimport ScrollBuffer from './modules/buffer.js';\nimport Viewport from './modules/viewport.js';\nimport Adapter from './modules/adapter.js';\n\nangular.module('ui.scroll', [])\n\n  .constant('JQLiteExtras', JQLiteExtras)\n  .run(['JQLiteExtras', (JQLiteExtras) => {\n    !window.jQuery ? (new JQLiteExtras()).registerFor(angular.element) : null;\n    ElementRoutines.addCSSRules();\n  }])\n\n  .directive('uiScrollViewport', function () {\n    return {\n      restrict: 'A',\n      controller: [\n        '$scope',\n        '$element',\n        function (scope, element) {\n          this.container = element;\n          this.viewport = element;\n          this.scope = scope;\n\n          angular.forEach(element.children(), child => {\n            if (child.tagName.toLowerCase() === 'tbody') {\n              this.viewport = angular.element(child);\n            }\n          });\n\n          return this;\n        }\n      ]\n    };\n  })\n\n  .directive('uiScroll', [\n    '$log',\n    '$injector',\n    '$rootScope',\n    '$timeout',\n    '$interval',\n    '$q',\n    '$parse',\n    function (console, $injector, $rootScope, $timeout, $interval, $q, $parse) {\n\n      return {\n        require: ['?^uiScrollViewport'],\n        restrict: 'A',\n        transclude: 'element',\n        priority: 1000,\n        terminal: true,\n        link: link\n      };\n\n      function link($scope, element, $attr, controllers, linker) {\n        const match = $attr.uiScroll.match(/^\\s*(\\w+)\\s+in\\s+([(\\w|\\$)\\.]+)\\s*$/);\n        if (!match) {\n          throw new Error('Expected uiScroll in form of \\'_item_ in _datasource_\\' but got \\'' + $attr.uiScroll + '\\'');\n        }\n\n        function parseNumericAttr(value, defaultValue) {\n          const result = $parse(value)($scope);\n          return isNaN(result) ? defaultValue : result;\n        }\n\n        const BUFFER_MIN = 3;\n        const BUFFER_DEFAULT = 10;\n        const PADDING_MIN = 0.3;\n        const PADDING_DEFAULT = 0.5;\n        const MAX_VIEWPORT_DELAY = 500;\n        const VIEWPORT_POLLING_INTERVAL = 50;\n\n        let datasource = null;\n        const itemName = match[1];\n        const datasourceName = match[2];\n        const viewportController = controllers[0];\n        const bufferSize = Math.max(BUFFER_MIN, parseNumericAttr($attr.bufferSize, BUFFER_DEFAULT));\n        const padding = Math.max(PADDING_MIN, parseNumericAttr($attr.padding, PADDING_DEFAULT));\n        let startIndex = parseNumericAttr($attr.startIndex, 1);\n        let ridActual = 0; // current data revision id\n        let pending = [];\n\n        const elementRoutines = new ElementRoutines($injector, $q);\n        const buffer = new ScrollBuffer(elementRoutines, bufferSize, startIndex);\n        const viewport = new Viewport(elementRoutines, buffer, element, viewportController, $rootScope, padding);\n        const adapter = new Adapter($scope, $parse, $attr, viewport, buffer, doAdjust, reload);\n\n        if (viewportController) {\n          viewportController.adapter = adapter;\n        }\n\n        const isDatasourceValid = () =>\n          Object.prototype.toString.call(datasource) === '[object Object]' && typeof datasource.get === 'function';\n\n        datasource = $parse(datasourceName)($scope); // try to get datasource on scope\n        if (!isDatasourceValid()) {\n          datasource = $injector.get(datasourceName); // try to inject datasource as service\n          if (!isDatasourceValid()) {\n            throw new Error(datasourceName + ' is not a valid datasource');\n          }\n        }\n\n        let onRenderHandlers = [];\n        function onRenderHandlersRunner() {\n          onRenderHandlers.forEach(handler => handler.run());\n          onRenderHandlers = [];\n        }\n        function persistDatasourceIndex(datasource, propName) {\n          let getter;\n          // need to postpone min/maxIndexUser processing if the view is empty\n          if(angular.isNumber(datasource[propName])) {\n            getter = datasource[propName];\n            if(angular.isNumber(getter)) {\n              onRenderHandlers = onRenderHandlers.filter(handler => handler.id !== propName);\n              onRenderHandlers.push({\n                id: propName,\n                run: () => datasource[propName] = getter\n              });\n            }\n          }\n        }\n\n        function defineDatasourceIndex(datasource, propName, propUserName) {\n          const descriptor = Object.getOwnPropertyDescriptor(datasource, propName);\n          if (descriptor && (descriptor.set || descriptor.get)) {\n            return;\n          }\n          let getter;\n          persistDatasourceIndex(datasource, propName);\n          Object.defineProperty(datasource, propName, {\n            set: (value) => {\n              getter = value;\n              if(pending.length && !buffer.length) {\n                persistDatasourceIndex(datasource, propName);\n                return;\n              }\n              buffer[propUserName] = value;\n              const topPaddingHeightOld = viewport.topDataPos();\n              viewport.adjustPaddings();\n              if (propName === 'minIndex') {\n                viewport.onAfterMinIndexSet(topPaddingHeightOld);\n              }\n            },\n            get: () => getter\n          });\n        }\n\n        defineDatasourceIndex(datasource, 'minIndex', 'minIndexUser');\n        defineDatasourceIndex(datasource, 'maxIndex', 'maxIndexUser');\n\n        const fetchNext = (datasource.get.length !== 2) ?\n          (success) => datasource.get(buffer.next, bufferSize, success) :\n          (success) => {\n            datasource.get({\n              index: buffer.next,\n              append: buffer.length ? buffer[buffer.length - 1].item : void 0,\n              count: bufferSize\n            }, success);\n          };\n\n        const fetchPrevious = (datasource.get.length !== 2) ?\n          (success) => datasource.get(buffer.first - bufferSize, bufferSize, success) :\n          (success) => {\n            datasource.get({\n              index: buffer.first - bufferSize,\n              prepend: buffer.length ? buffer[0].item : void 0,\n              count: bufferSize\n            }, success);\n          };\n\n        const initialize = () => {\n          let tryCount = 0;\n          if(!viewport.applyContainerStyle()) {\n            const timer = $interval(() => {\n              tryCount++;\n              if(viewport.applyContainerStyle()) {\n                $interval.cancel(timer);\n                doAdjust();\n              }\n              if(tryCount * VIEWPORT_POLLING_INTERVAL >= MAX_VIEWPORT_DELAY) {\n                $interval.cancel(timer);\n                throw Error(`ui-scroll directive requires a viewport with non-zero height in ${MAX_VIEWPORT_DELAY}ms`);\n              }\n            }, VIEWPORT_POLLING_INTERVAL);\n          }\n          else {\n            doAdjust();\n          }\n        };\n\n        /**\n         * Build padding elements\n         *\n         * Calling linker is the only way I found to get access to the tag name of the template\n         * to prevent the directive scope from pollution a new scope is created and destroyed\n         * right after the builder creation is completed\n         */\n        linker((clone, scope) => {\n          viewport.createPaddingElements(clone[0]);\n          // we do not include the clone in the DOM. It means that the nested directives will not\n          // be able to reach the parent directives, but in this case it is intentional because we\n          // created the clone to access the template tag name\n          scope.$destroy();\n          clone.remove();\n        });\n\n        $scope.$on('$destroy', () => {\n          unbindEvents();\n          viewport.unbind('mousewheel', wheelHandler);\n        });\n\n        viewport.bind('mousewheel', wheelHandler);\n\n        initialize();\n\n        /* Private function definitions */\n\n        function isInvalid(rid) {\n          return (rid && rid !== ridActual) || $scope.$$destroyed;\n        }\n\n        function bindEvents() {\n          viewport.bind('resize', resizeAndScrollHandler);\n          viewport.bind('scroll', resizeAndScrollHandler);\n        }\n\n        function unbindEvents() {\n          viewport.unbind('resize', resizeAndScrollHandler);\n          viewport.unbind('scroll', resizeAndScrollHandler);\n        }\n\n        function reload() {\n          viewport.resetTopPadding();\n          viewport.resetBottomPadding();\n          if (arguments.length) {\n            startIndex = arguments[0];\n          }\n          buffer.reset(startIndex);\n          persistDatasourceIndex(datasource, 'minIndex');\n          persistDatasourceIndex(datasource, 'maxIndex');\n          doAdjust();\n        }\n\n        function isElementVisible(wrapper) {\n          return wrapper.element.height() && wrapper.element[0].offsetParent;\n        }\n\n        function visibilityWatcher(wrapper) {\n          if (isElementVisible(wrapper)) {\n            buffer.forEach((item) => {\n              if (typeof item.unregisterVisibilityWatcher === 'function') {\n                item.unregisterVisibilityWatcher();\n                delete item.unregisterVisibilityWatcher;\n              }\n            });\n            if (!pending.length) {\n              $timeout(() => doAdjust());\n            }\n          }\n        }\n\n        function insertWrapperContent(wrapper, insertAfter) {\n          createElement(wrapper, insertAfter, viewport.insertElement);\n          if (!isElementVisible(wrapper)) {\n            wrapper.unregisterVisibilityWatcher = wrapper.scope.$watch(() => visibilityWatcher(wrapper));\n          }\n          elementRoutines.hideElement(wrapper); // hide inserted elements before data binding\n        }\n\n        function createElement(wrapper, insertAfter, insertElement) {\n          let promises = null;\n          const sibling = (insertAfter > 0) ? buffer[insertAfter - 1].element : undefined;\n          linker((clone, scope) => {\n            promises = insertElement(clone, sibling);\n            wrapper.element = clone;\n            wrapper.scope = scope;\n            scope[itemName] = wrapper.item;\n          });\n          // ui-scroll-grid apply\n          if (adapter.transform) {\n            const tdInitializer = wrapper.scope.uiScrollTdInitializer;\n            if (tdInitializer && tdInitializer.linking) {\n              adapter.transform(wrapper.scope, wrapper.element);\n            } else {\n              wrapper.scope.uiScrollTdInitializer = {\n                onLink: () => adapter.transform(wrapper.scope, wrapper.element),\n                scope: wrapper.scope\n              };\n            }\n          }\n          return promises;\n        }\n\n        function updateDOM() {\n          let promises = [];\n          const toBePrepended = [];\n          const toBeRemoved = [];\n          const inserted = [];\n\n          buffer.forEach((wrapper, i) => {\n            switch (wrapper.op) {\n              case 'prepend':\n                toBePrepended.unshift(wrapper);\n                break;\n              case 'append':\n                insertWrapperContent(wrapper, i);\n                wrapper.op = 'none';\n                inserted.push(wrapper);\n                break;\n              case 'insert':\n                promises = promises.concat(createElement(wrapper, i, viewport.insertElementAnimated));\n                wrapper.op = 'none';\n                inserted.push(wrapper);\n                break;\n              case 'remove':\n                toBeRemoved.push(wrapper);\n            }\n          });\n\n          toBeRemoved.forEach((wrapper) => promises = promises.concat(viewport.removeItem(wrapper)));\n\n          if (toBePrepended.length)\n            toBePrepended.forEach((wrapper) => {\n              insertWrapperContent(wrapper);\n              wrapper.op = 'none';\n            });\n\n          buffer.forEach((item, i) => item.scope.$index = buffer.first + i);\n\n          return {\n            prepended: toBePrepended,\n            removed: toBeRemoved,\n            inserted: inserted,\n            animated: promises\n          };\n\n        }\n\n        function updatePaddings(rid, updates) {\n          // schedule another doAdjust after animation completion\n          if (updates.animated.length) {\n            $q.all(updates.animated).then(() => {\n              viewport.adjustPaddings();\n              doAdjust(rid);\n            });\n          } else {\n            viewport.adjustPaddings();\n          }\n        }\n\n        function enqueueFetch(rid, updates) {\n          if (viewport.shouldLoadBottom()) {\n            if (!updates || buffer.effectiveHeight(updates.inserted) > 0) {\n              // this means that at least one item appended in the last batch has height > 0\n              if (pending.push(true) === 1) {\n                adapter.loading(true);\n                fetch(rid);\n              }\n            }\n          } else if (viewport.shouldLoadTop()) {\n            if ((!updates || buffer.effectiveHeight(updates.prepended) > 0) || pending[0]) {\n              // this means that at least one item appended in the last batch has height > 0\n              // pending[0] = true means that previous fetch was appending. We need to force at least one prepend\n              // BTW there will always be at least 1 element in the pending array because bottom is fetched first\n              if (pending.push(false) === 1) {\n                adapter.loading(true);\n                fetch(rid);\n              }\n            }\n          }\n        }\n\n        function processUpdates() {\n          const updates = updateDOM();\n\n          // We need the item bindings to be processed before we can do adjustments\n          !$scope.$$phase && !$rootScope.$$phase && $scope.$digest();\n\n          updates.inserted.forEach(w => elementRoutines.showElement(w));\n          updates.prepended.forEach(w => elementRoutines.showElement(w));\n          return updates;\n        }\n\n        function doAdjust(rid) {\n          if (!rid) { // dismiss pending requests\n            pending = [];\n            rid = ++ridActual;\n          }\n\n          const updates = processUpdates();\n\n          if (isInvalid(rid)) {\n            return;\n          }\n\n          updatePaddings(rid, updates);\n          enqueueFetch(rid);\n\n          if (!pending.length) {\n            adapter.calculateProperties();\n          }\n        }\n\n        function doAdjustAfterFetch(rid) {\n          const updates = processUpdates();\n\n          viewport.onAfterPrepend(updates);\n\n          if (isInvalid(rid)) {\n            return;\n          }\n\n          updatePaddings(rid, updates);\n          onRenderHandlersRunner();\n          enqueueFetch(rid, updates);\n          pending.shift();\n\n          if (pending.length)\n            fetch(rid);\n          else {\n            adapter.loading(false);\n            bindEvents();\n            adapter.calculateProperties();\n          }\n        }\n\n        function fetch(rid) {\n          if (pending[0]) {// scrolling down\n            if (buffer.length && !viewport.shouldLoadBottom()) {\n              doAdjustAfterFetch(rid);\n            } else {\n              fetchNext((result) => {\n                if (isInvalid(rid)) {\n                  return;\n                }\n\n                if (result.length < bufferSize) {\n                  buffer.eof = true;\n                }\n\n                if (result.length > 0) {\n                  viewport.clipTop();\n                  buffer.append(result);\n                }\n\n                doAdjustAfterFetch(rid);\n              });\n            }\n          } else {  // scrolling up\n            if (buffer.length && !viewport.shouldLoadTop()) {\n              doAdjustAfterFetch(rid);\n            } else {\n              fetchPrevious((result) => {\n                if (isInvalid(rid)) {\n                  return;\n                }\n\n                if (result.length < bufferSize) {\n                  buffer.bof = true;\n                  // log 'bof is reached'\n                }\n\n                if (result.length > 0) {\n                  if (buffer.length) {\n                    viewport.clipBottom();\n                  }\n                  buffer.prepend(result);\n                }\n\n                doAdjustAfterFetch(rid);\n              });\n            }\n          }\n        }\n\n        function resizeAndScrollHandler() {\n          if (!$rootScope.$$phase && !adapter.isLoading && !adapter.disabled) {\n\n            enqueueFetch(ridActual);\n\n            if (pending.length) {\n              unbindEvents();\n            } else {\n              adapter.calculateProperties();\n              !$scope.$$phase && $scope.$digest();\n            }\n          }\n        }\n\n        function wheelHandler(event) {\n          if (!adapter.disabled) {\n            const scrollTop = viewport[0].scrollTop;\n            const yMax = viewport[0].scrollHeight - viewport[0].clientHeight;\n\n            if ((scrollTop === 0 && !buffer.bof) || (scrollTop === yMax && !buffer.eof)) {\n              event.preventDefault();\n            }\n          }\n        }\n      }\n\n    }\n  ]);\n\n\n\n// WEBPACK FOOTER //\n// ./src/ui-scroll.js","/*!\r\n globals: angular, window\r\n List of used element methods available in JQuery but not in JQuery Lite\r\n element.before(elem)\r\n element.height()\r\n element.outerHeight(true)\r\n element.height(value) = only for Top/Bottom padding elements\r\n element.scrollTop()\r\n element.scrollTop(value)\r\n */\r\n\r\nexport default class JQLiteExtras {\r\n\r\n  registerFor(element) {\r\n    let convertToPx, css, getStyle, isWindow;\r\n    // angular implementation blows up if elem is the window\r\n    css = angular.element.prototype.css;\r\n\r\n    element.prototype.css = function (name, value) {\r\n      let self = this;\r\n      let elem = self[0];\r\n      if (!(!elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style)) {\r\n        return css.call(self, name, value);\r\n      }\r\n    };\r\n\r\n    // as defined in angularjs v1.0.5\r\n    isWindow = (obj) => obj && obj.document && obj.location && obj.alert && obj.setInterval;\r\n\r\n    function scrollTo(self, direction, value) {\r\n      let elem = self[0];\r\n      let [method, prop, preserve] = {\r\n        top: [\r\n          'scrollTop',\r\n          'pageYOffset',\r\n          'scrollLeft'\r\n        ],\r\n        left: [\r\n          'scrollLeft',\r\n          'pageXOffset',\r\n          'scrollTop'\r\n        ]\r\n      }[direction];\r\n\r\n      const isValueDefined = typeof value !== 'undefined';\r\n      if (isWindow(elem)) {\r\n        if (isValueDefined) {\r\n          return elem.scrollTo(self[preserve].call(self), value);\r\n        }\r\n        return (prop in elem) ? elem[prop] : elem.document.documentElement[method];\r\n      } else {\r\n        if (isValueDefined) {\r\n          elem[method] = value;\r\n        }\r\n        return elem[method];\r\n      }\r\n    }\r\n\r\n    if (window.getComputedStyle) {\r\n      getStyle = (elem) => window.getComputedStyle(elem, null);\r\n      convertToPx = (elem, value) => parseFloat(value);\r\n    } else {\r\n      getStyle = (elem) => elem.currentStyle;\r\n      convertToPx = (elem, value) => {\r\n        let left, result, rs, rsLeft, style;\r\n        let core_pnum = /[+-]?(?:\\d*\\.|)\\d+(?:[eE][+-]?\\d+|)/.source;\r\n        let rnumnonpx = new RegExp('^(' + core_pnum + ')(?!px)[a-z%]+$', 'i');\r\n\r\n        if (!rnumnonpx.test(value)) {\r\n          return parseFloat(value);\r\n        }\r\n\r\n        // ported from JQuery\r\n        style = elem.style;\r\n        left = style.left;\r\n        rs = elem.runtimeStyle;\r\n        rsLeft = rs && rs.left;\r\n        if (rs) {\r\n          rs.left = style.left;\r\n        }\r\n        // put in the new values to get a computed style out\r\n        style.left = value;\r\n        result = style.pixelLeft;\r\n        style.left = left;\r\n        if (rsLeft) {\r\n          rs.left = rsLeft;\r\n        }\r\n        return result;\r\n      };\r\n    }\r\n\r\n    function getMeasurements(elem, measure) {\r\n      let base, borderA, borderB, computedMarginA, computedMarginB, computedStyle, dirA, dirB, marginA, marginB, paddingA, paddingB;\r\n\r\n      if (isWindow(elem)) {\r\n        base = document.documentElement[{height: 'clientHeight', width: 'clientWidth'}[measure]];\r\n\r\n        return {\r\n          base: base,\r\n          padding: 0,\r\n          border: 0,\r\n          margin: 0\r\n        };\r\n      }\r\n\r\n      // Start with offset property\r\n      [\r\n        base,\r\n        dirA,\r\n        dirB\r\n      ] = {\r\n        width: [\r\n          elem.offsetWidth,\r\n          'Left',\r\n          'Right'\r\n        ],\r\n        height: [\r\n          elem.offsetHeight,\r\n          'Top',\r\n          'Bottom'\r\n        ]\r\n      }[measure];\r\n\r\n      computedStyle = getStyle(elem);\r\n      paddingA = convertToPx(elem, computedStyle['padding' + dirA]) || 0;\r\n      paddingB = convertToPx(elem, computedStyle['padding' + dirB]) || 0;\r\n      borderA = convertToPx(elem, computedStyle['border' + dirA + 'Width']) || 0;\r\n      borderB = convertToPx(elem, computedStyle['border' + dirB + 'Width']) || 0;\r\n      computedMarginA = computedStyle['margin' + dirA];\r\n      computedMarginB = computedStyle['margin' + dirB];\r\n\r\n      // I do not care for width for now, so this hack is irrelevant\r\n      // if ( !supportsPercentMargin )\r\n      // computedMarginA = hackPercentMargin( elem, computedStyle, computedMarginA )\r\n      // computedMarginB = hackPercentMargin( elem, computedStyle, computedMarginB )\r\n      marginA = convertToPx(elem, computedMarginA) || 0;\r\n      marginB = convertToPx(elem, computedMarginB) || 0;\r\n\r\n      return {\r\n        base: base,\r\n        padding: paddingA + paddingB,\r\n        border: borderA + borderB,\r\n        margin: marginA + marginB\r\n      };\r\n    }\r\n\r\n    function getWidthHeight(elem, direction, measure) {\r\n      let computedStyle, result;\r\n\r\n      let measurements = getMeasurements(elem, direction);\r\n\r\n      if (measurements.base > 0) {\r\n        return {\r\n          base: measurements.base - measurements.padding - measurements.border,\r\n          outer: measurements.base,\r\n          outerfull: measurements.base + measurements.margin\r\n        }[measure];\r\n      }\r\n\r\n      // Fall back to computed then uncomputed css if necessary\r\n      computedStyle = getStyle(elem);\r\n      result = computedStyle[direction];\r\n\r\n      if (result < 0 || result === null) {\r\n        result = elem.style[direction] || 0;\r\n      }\r\n\r\n      // Normalize \"\", auto, and prepare for extra\r\n      result = parseFloat(result) || 0;\r\n\r\n      return {\r\n        base: result - measurements.padding - measurements.border,\r\n        outer: result,\r\n        outerfull: result + measurements.padding + measurements.border + measurements.margin\r\n      }[measure];\r\n    }\r\n\r\n    // define missing methods\r\n    return angular.forEach({\r\n      before(newElem) {\r\n        var children, elem, i, j, parent, ref, self;\r\n        self = this;\r\n        elem = self[0];\r\n        parent = self.parent();\r\n        children = parent.contents();\r\n        if (children[0] === elem) {\r\n          return parent.prepend(newElem);\r\n        } else {\r\n          for (i = j = 1, ref = children.length - 1; 1 <= ref ? j <= ref : j >= ref; i = 1 <= ref ? ++j : --j) {\r\n            if (children[i] === elem) {\r\n              angular.element(children[i - 1]).after(newElem);\r\n              return;\r\n            }\r\n          }\r\n          throw new Error('invalid DOM structure ' + elem.outerHTML);\r\n        }\r\n      },\r\n      height (value){\r\n        var self;\r\n        self = this;\r\n        if (typeof value !== 'undefined') {\r\n          if (angular.isNumber(value)) {\r\n            value = value + 'px';\r\n          }\r\n          return css.call(self, 'height', value);\r\n        } else {\r\n          return getWidthHeight(this[0], 'height', 'base');\r\n        }\r\n      },\r\n      outerHeight(option) {\r\n        return getWidthHeight(this[0], 'height', option ? 'outerfull' : 'outer');\r\n      },\r\n      outerWidth(option) {\r\n        return getWidthHeight(this[0], 'width', option ? 'outerfull' : 'outer');\r\n      },\r\n\r\n      /*\r\n       The offset setter method is not implemented\r\n       */\r\n      offset(value) {\r\n        let docElem, win;\r\n        let self = this;\r\n        let box = {\r\n          top: 0,\r\n          left: 0\r\n        };\r\n        let elem = self[0];\r\n        let doc = elem && elem.ownerDocument;\r\n\r\n        if (arguments.length) {\r\n          if (value === undefined) {\r\n            return self;\r\n          }\r\n          // TODO: implement setter\r\n          throw new Error('offset setter method is not implemented');\r\n        }\r\n\r\n        if (!doc) {\r\n          return;\r\n        }\r\n\r\n        docElem = doc.documentElement;\r\n\r\n        // TODO: Make sure it's not a disconnected DOM node\r\n\r\n        if (elem.getBoundingClientRect != null) {\r\n          box = elem.getBoundingClientRect();\r\n        }\r\n\r\n        win = doc.defaultView || doc.parentWindow;\r\n\r\n        return {\r\n          top: box.top + (win.pageYOffset || docElem.scrollTop) - (docElem.clientTop || 0),\r\n          left: box.left + (win.pageXOffset || docElem.scrollLeft) - (docElem.clientLeft || 0)\r\n        };\r\n      },\r\n      scrollTop(value) {\r\n        return scrollTo(this, 'top', value);\r\n      },\r\n      scrollLeft(value) {\r\n        return scrollTo(this, 'left', value);\r\n      }\r\n    }, (value, key) => {\r\n      if (!element.prototype[key]) {\r\n        return element.prototype[key] = value;\r\n      }\r\n    });\r\n  }\r\n\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/jqLiteExtras.js","const hideClassToken = 'ng-ui-scroll-hide';\r\n\r\nexport default class ElementRoutines {\r\n\r\n  static addCSSRules() {\r\n    const selector = '.' + hideClassToken;\r\n    const rules = 'display: none';\r\n    const sheet = document.styleSheets[0];\r\n    let index;\r\n    try {\r\n      index = sheet.cssRules.length;\r\n    } catch (err) {\r\n      index = 0;\r\n    }\r\n    if('insertRule' in sheet) {\r\n      sheet.insertRule(selector + '{' + rules + '}', index);\r\n    }\r\n    else if('addRule' in sheet) {\r\n      sheet.addRule(selector, rules, index);\r\n    }\r\n  }\r\n\r\n  constructor($injector, $q) {\r\n    this.$animate = ($injector.has && $injector.has('$animate')) ? $injector.get('$animate') : null;\r\n    this.isAngularVersionLessThen1_3 = angular.version.major === 1 && angular.version.minor < 3;\r\n    this.$q = $q;\r\n  }\r\n\r\n  hideElement(wrapper) {\r\n    wrapper.element.addClass(hideClassToken);\r\n  }\r\n\r\n  showElement(wrapper) {\r\n    wrapper.element.removeClass(hideClassToken);\r\n  }\r\n\r\n  insertElement(newElement, previousElement) {\r\n    previousElement.after(newElement);\r\n    return [];\r\n  }\r\n\r\n  removeElement(wrapper) {\r\n    wrapper.element.remove();\r\n    wrapper.scope.$destroy();\r\n    return [];\r\n  }\r\n\r\n  insertElementAnimated(newElement, previousElement) {\r\n    if (!this.$animate) {\r\n      return this.insertElement(newElement, previousElement);\r\n    }\r\n\r\n    if (this.isAngularVersionLessThen1_3) {\r\n      const deferred = this.$q.defer();\r\n      // no need for parent - previous element is never null\r\n      this.$animate.enter(newElement, null, previousElement, () => deferred.resolve());\r\n\r\n      return [deferred.promise];\r\n    }\r\n\r\n    // no need for parent - previous element is never null\r\n    return [this.$animate.enter(newElement, null, previousElement)];\r\n  }\r\n\r\n  removeElementAnimated(wrapper) {\r\n    if (!this.$animate) {\r\n      return this.removeElement(wrapper);\r\n    }\r\n\r\n    if (this.isAngularVersionLessThen1_3) {\r\n      const deferred = this.$q.defer();\r\n      this.$animate.leave(wrapper.element, () => {\r\n        wrapper.scope.$destroy();\r\n        return deferred.resolve();\r\n      });\r\n\r\n      return [deferred.promise];\r\n    }\r\n\r\n    return [(this.$animate.leave(wrapper.element)).then(() => wrapper.scope.$destroy())];\r\n  }\r\n}\n\n\n// WEBPACK FOOTER //\n// ./src/modules/elementRoutines.js","export default function ScrollBuffer(elementRoutines, bufferSize, startIndex) {\r\n  const buffer = Object.create(Array.prototype);\r\n\r\n  angular.extend(buffer, {\r\n    size: bufferSize,\r\n\r\n    reset(startIndex) {\r\n      buffer.remove(0, buffer.length);\r\n      buffer.eof = false;\r\n      buffer.bof = false;\r\n      buffer.first = startIndex;\r\n      buffer.next = startIndex;\r\n      buffer.minIndex = startIndex;\r\n      buffer.maxIndex = startIndex;\r\n      buffer.minIndexUser = null;\r\n      buffer.maxIndexUser = null;\r\n    },\r\n\r\n    append(items) {\r\n      items.forEach((item) => {\r\n        ++buffer.next;\r\n        buffer.insert('append', item);\r\n      });\r\n      buffer.maxIndex = buffer.eof ? buffer.next - 1 : Math.max(buffer.next - 1, buffer.maxIndex);\r\n    },\r\n\r\n    prepend(items) {\r\n      items.reverse().forEach((item) => {\r\n        --buffer.first;\r\n        buffer.insert('prepend', item);\r\n      });\r\n      buffer.minIndex = buffer.bof ? buffer.minIndex = buffer.first : Math.min(buffer.first, buffer.minIndex);\r\n    },\r\n\r\n    /**\r\n     * inserts wrapped element in the buffer\r\n     * the first argument is either operation keyword (see below) or a number for operation 'insert'\r\n     * for insert the number is the index for the buffer element the new one have to be inserted after\r\n     * operations: 'append', 'prepend', 'insert', 'remove', 'update', 'none'\r\n     */\r\n    insert(operation, item, isTop) {\r\n      const wrapper = {\r\n        item: item\r\n      };\r\n\r\n      if (operation % 1 === 0) {// it is an insert\r\n        wrapper.op = 'insert';\r\n        buffer.splice(operation, 0, wrapper);\r\n        if(isTop) {\r\n          buffer.first--;\r\n        }\r\n        else {\r\n          buffer.next++;\r\n        }\r\n      } else {\r\n        wrapper.op = operation;\r\n        switch (operation) {\r\n          case 'append':\r\n            buffer.push(wrapper);\r\n            break;\r\n          case 'prepend':\r\n            buffer.unshift(wrapper);\r\n            break;\r\n        }\r\n      }\r\n    },\r\n\r\n    // removes elements from buffer\r\n    remove(arg1, arg2) {\r\n      if (angular.isNumber(arg1)) {\r\n        // removes items from arg1 (including) through arg2 (excluding)\r\n        for (let i = arg1; i < arg2; i++) {\r\n          elementRoutines.removeElement(buffer[i]);\r\n        }\r\n        return buffer.splice(arg1, arg2 - arg1);\r\n      }\r\n      // removes single item(wrapper) from the buffer\r\n      buffer.splice(buffer.indexOf(arg1), 1);\r\n      if(arg1._op === 'isTop' && buffer.first === this.getAbsMinIndex()) {\r\n        this.incrementMinIndex();\r\n      }\r\n      else {\r\n        this.decrementMaxIndex();\r\n      }\r\n      if(arg1._op === 'isTop') {\r\n        buffer.first++;\r\n      }\r\n      else {\r\n        buffer.next--;\r\n      }\r\n      if(!buffer.length) {\r\n        buffer.first = 1;\r\n        buffer.next = 1;\r\n      }\r\n\r\n      return elementRoutines.removeElementAnimated(arg1);\r\n    },\r\n\r\n    incrementMinIndex() {\r\n      if(buffer.minIndexUser !== null) {\r\n        if(buffer.minIndex > buffer.minIndexUser) {\r\n          buffer.minIndexUser++;\r\n          return;\r\n        }\r\n        if(buffer.minIndex === buffer.minIndexUser) {\r\n          buffer.minIndexUser++;\r\n        }\r\n      }\r\n      buffer.minIndex++;\r\n    },\r\n\r\n    decrementMaxIndex() {\r\n      if(buffer.maxIndexUser !== null && buffer.maxIndex <= buffer.maxIndexUser) {\r\n        buffer.maxIndexUser--;\r\n      }\r\n      buffer.maxIndex--;\r\n    },\r\n\r\n    getAbsMinIndex() {\r\n      if(buffer.minIndexUser !== null) {\r\n        return Math.min(buffer.minIndexUser, buffer.minIndex);\r\n      }\r\n      return buffer.minIndex;\r\n    },\r\n\r\n    getAbsMaxIndex() {\r\n      if(buffer.maxIndexUser !== null) {\r\n        return Math.max(buffer.maxIndexUser, buffer.maxIndex);\r\n      }\r\n      return buffer.maxIndex;\r\n    },\r\n\r\n    effectiveHeight(elements) {\r\n      if (!elements.length) {\r\n        return 0;\r\n      }\r\n      let top = Number.MAX_VALUE;\r\n      let bottom = Number.NEGATIVE_INFINITY;\r\n      elements.forEach((wrapper) => {\r\n        if (wrapper.element[0].offsetParent) {\r\n          // element style is not display:none\r\n          top = Math.min(top, wrapper.element.offset().top);\r\n          bottom = Math.max(bottom, wrapper.element.offset().top + wrapper.element.outerHeight(true));\r\n        }\r\n      });\r\n      return Math.max(0, bottom - top);\r\n    }\r\n\r\n  });\r\n\r\n  buffer.reset(startIndex);\r\n\r\n  return buffer;\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/buffer.js","import Padding from './padding';\r\n\r\nexport default function Viewport(elementRoutines, buffer, element, viewportController, $rootScope, padding) {\r\n  let topPadding = null;\r\n  let bottomPadding = null;\r\n  const viewport = viewportController && viewportController.viewport ? viewportController.viewport : angular.element(window);\r\n  const container = viewportController && viewportController.container ? viewportController.container : undefined;\r\n  const scope = viewportController && viewportController.scope ? viewportController.scope : $rootScope;\r\n\r\n  viewport.css({\r\n    'overflow-anchor': 'none',\r\n    'overflow-y': 'auto',\r\n    'display': 'block'\r\n  });\r\n\r\n  function bufferPadding() {\r\n    return viewport.outerHeight() * padding; // some extra space to initiate preload\r\n  }\r\n\r\n  angular.extend(viewport, {\r\n    getScope() {\r\n      return scope;\r\n    },\r\n\r\n    createPaddingElements(template) {\r\n      topPadding = new Padding(template);\r\n      bottomPadding = new Padding(template);\r\n      element.before(topPadding.element);\r\n      element.after(bottomPadding.element);\r\n      topPadding.height(0);\r\n      bottomPadding.height(0);\r\n    },\r\n\r\n    applyContainerStyle() {\r\n      if (!container) {\r\n        return true;\r\n      }\r\n      if(container !== viewport) {\r\n        viewport.css('height', window.getComputedStyle(container[0]).height);\r\n      }\r\n      return viewport.height() > 0;\r\n    },\r\n\r\n    bottomDataPos() {\r\n      let scrollHeight = viewport[0].scrollHeight;\r\n      scrollHeight = scrollHeight != null ? scrollHeight : viewport[0].document.documentElement.scrollHeight;\r\n      return scrollHeight - bottomPadding.height();\r\n    },\r\n\r\n    topDataPos() {\r\n      return topPadding.height();\r\n    },\r\n\r\n    bottomVisiblePos() {\r\n      return viewport.scrollTop() + viewport.outerHeight();\r\n    },\r\n\r\n    topVisiblePos() {\r\n      return viewport.scrollTop();\r\n    },\r\n\r\n    insertElement(e, sibling) {\r\n      return elementRoutines.insertElement(e, sibling || topPadding.element);\r\n    },\r\n\r\n    insertElementAnimated(e, sibling) {\r\n      return elementRoutines.insertElementAnimated(e, sibling || topPadding.element);\r\n    },\r\n\r\n    shouldLoadBottom() {\r\n      return !buffer.eof && viewport.bottomDataPos() < viewport.bottomVisiblePos() + bufferPadding();\r\n    },\r\n\r\n    clipBottom() {\r\n      // clip the invisible items off the bottom\r\n      let overage = 0;\r\n      let overageHeight = 0;\r\n      let itemHeight = 0;\r\n      let emptySpaceHeight = viewport.bottomDataPos() - viewport.bottomVisiblePos() - bufferPadding();\r\n\r\n      for (let i = buffer.length - 1; i >= 0; i--) {\r\n        itemHeight = buffer[i].element.outerHeight(true);\r\n        if (overageHeight + itemHeight > emptySpaceHeight) {\r\n          break;\r\n        }\r\n        bottomPadding.cache.add(buffer[i]);\r\n        overageHeight += itemHeight;\r\n        overage++;\r\n      }\r\n\r\n      if (overage > 0) {\r\n        buffer.eof = false;\r\n        buffer.remove(buffer.length - overage, buffer.length);\r\n        buffer.next -= overage;\r\n        viewport.adjustPaddings();\r\n      }\r\n    },\r\n\r\n    shouldLoadTop() {\r\n      return !buffer.bof && (viewport.topDataPos() > viewport.topVisiblePos() - bufferPadding());\r\n    },\r\n\r\n    clipTop() {\r\n      // clip the invisible items off the top\r\n      let overage = 0;\r\n      let overageHeight = 0;\r\n      let itemHeight = 0;\r\n      let emptySpaceHeight = viewport.topVisiblePos() - viewport.topDataPos() - bufferPadding();\r\n\r\n      for (let i = 0; i < buffer.length; i++) {\r\n        itemHeight = buffer[i].element.outerHeight(true);\r\n        if (overageHeight + itemHeight > emptySpaceHeight) {\r\n          break;\r\n        }\r\n        topPadding.cache.add(buffer[i]);\r\n        overageHeight += itemHeight;\r\n        overage++;\r\n      }\r\n\r\n      if (overage > 0) {\r\n        // we need to adjust top padding element before items are removed from top\r\n        // to avoid strange behaviour of scroll bar during remove top items when we are at the very bottom\r\n        topPadding.height(topPadding.height() + overageHeight);\r\n        buffer.bof = false;\r\n        buffer.remove(0, overage);\r\n        buffer.first += overage;\r\n      }\r\n    },\r\n\r\n    adjustPaddings() {\r\n      if (!buffer.length) {\r\n        return;\r\n      }\r\n\r\n      // precise heights calculation based on items that are in buffer or that were in buffer once\r\n      const visibleItemsHeight = buffer.reduce((summ, item) => summ + item.element.outerHeight(true), 0);\r\n\r\n      let topPaddingHeight = 0, topCount = 0;\r\n      topPadding.cache.forEach(item => {\r\n        if(item.index < buffer.first) {\r\n          topPaddingHeight += item.height;\r\n          topCount++;\r\n        }\r\n      });\r\n\r\n      let bottomPaddingHeight = 0, bottomCount = 0;\r\n      bottomPadding.cache.forEach(item => {\r\n        if(item.index >= buffer.next) {\r\n          bottomPaddingHeight += item.height;\r\n          bottomCount++;\r\n        }\r\n      });\r\n\r\n      const totalHeight = visibleItemsHeight + topPaddingHeight + bottomPaddingHeight;\r\n      const averageItemHeight = totalHeight / (topCount + bottomCount + buffer.length);\r\n\r\n      // average heights calculation, items that have never been reached\r\n      let adjustTopPadding = buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser;\r\n      let adjustBottomPadding = buffer.maxIndexUser !== null && buffer.maxIndex < buffer.maxIndexUser;\r\n      let topPaddingHeightAdd = adjustTopPadding ? (buffer.minIndex - buffer.minIndexUser) * averageItemHeight : 0;\r\n      let bottomPaddingHeightAdd = adjustBottomPadding ? (buffer.maxIndexUser - buffer.maxIndex) * averageItemHeight : 0;\r\n\r\n      // paddings combine adjustment\r\n      topPadding.height(topPaddingHeight + topPaddingHeightAdd);\r\n      bottomPadding.height(bottomPaddingHeight + bottomPaddingHeightAdd);\r\n    },\r\n\r\n    onAfterMinIndexSet(topPaddingHeightOld) {\r\n      // additional scrollTop adjustment in case of datasource.minIndex external set\r\n      if (buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser) {\r\n        let diff = topPadding.height() - topPaddingHeightOld;\r\n        viewport.scrollTop(viewport.scrollTop() + diff);\r\n        while((diff -= viewport.scrollTop()) > 0) {\r\n          bottomPadding.height(bottomPadding.height() + diff);\r\n          viewport.scrollTop(viewport.scrollTop() + diff);\r\n        }\r\n      }\r\n    },\r\n\r\n    onAfterPrepend(updates) {\r\n      if (!updates.prepended.length)\r\n        return;\r\n      const height = buffer.effectiveHeight(updates.prepended);\r\n      const paddingHeight = topPadding.height() - height;\r\n      if (paddingHeight >= 0) {\r\n        topPadding.height(paddingHeight);\r\n      }\r\n      else {\r\n        topPadding.height(0);\r\n        viewport.scrollTop(viewport.scrollTop() - paddingHeight);\r\n      }\r\n    },\r\n\r\n    resetTopPadding() {\r\n      topPadding.height(0);\r\n      topPadding.cache.clear();\r\n    },\r\n\r\n    resetBottomPadding() {\r\n      bottomPadding.height(0);\r\n      bottomPadding.cache.clear();\r\n    },\r\n\r\n    removeCacheItem(item, isTop) {\r\n      topPadding.cache.remove(item, isTop);\r\n      bottomPadding.cache.remove(item, isTop);\r\n    },\r\n\r\n    removeItem(item) {\r\n      this.removeCacheItem(item);\r\n      return buffer.remove(item);\r\n    }\r\n  });\r\n\r\n  return viewport;\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/viewport.js","// Can't just extend the Array, due to Babel does not support built-in classes extending\r\n// This solution was taken from https://stackoverflow.com/questions/46897414/es6-class-extends-array-workaround-for-es5-babel-transpile\r\nclass CacheProto {\r\n  add(item) {\r\n    for (let i = this.length - 1; i >= 0; i--) {\r\n      if (this[i].index === item.scope.$index) {\r\n        this[i].height = item.element.outerHeight();\r\n        return;\r\n      }\r\n    }\r\n    this.push({\r\n      index: item.scope.$index,\r\n      height: item.element.outerHeight()\r\n    });\r\n    this.sort((a, b) => ((a.index < b.index) ? -1 : ((a.index > b.index) ? 1 : 0)));\r\n  }\r\n\r\n  remove(argument, _isTop) {\r\n    const index = argument % 1 === 0 ? argument : argument.scope.$index;\r\n    const isTop = argument % 1 === 0 ? _isTop : argument._op === 'isTop';\r\n    for (let i = this.length - 1; i >= 0; i--) {\r\n      if (this[i].index === index) {\r\n        this.splice(i, 1);\r\n        break;\r\n      }\r\n    }\r\n    if(!isTop) {\r\n      for (let i = this.length - 1; i >= 0; i--) {\r\n        if (this[i].index > index) {\r\n          this[i].index--;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  clear() {\r\n    this.length = 0;\r\n  }\r\n}\r\n\r\nfunction Cache() {\r\n  const instance = [];\r\n  instance.push.apply(instance, arguments);\r\n  Object.setPrototypeOf(instance, Cache.prototype);\r\n  return instance;\r\n}\r\nCache.prototype = Object.create(Array.prototype);\r\nObject.getOwnPropertyNames(CacheProto.prototype).forEach(methodName =>\r\n  Cache.prototype[methodName] = CacheProto.prototype[methodName]\r\n);\r\n\r\nfunction generateElement(template) {\r\n  if(template.nodeType !== Node.ELEMENT_NODE) {\r\n    throw new Error('ui-scroll directive requires an Element node for templating the view');\r\n  }\r\n  let element;\r\n  switch (template.tagName.toLowerCase()) {\r\n    case 'dl':\r\n      throw new Error(`ui-scroll directive does not support <${template.tagName}> as a repeating tag: ${template.outerHTML}`);\r\n    case 'tr':\r\n      let table = angular.element('<table><tr><td><div></div></td></tr></table>');\r\n      element = table.find('tr');\r\n      break;\r\n    case 'li':\r\n      element = angular.element('<li></li>');\r\n      break;\r\n    default:\r\n      element = angular.element('<div></div>');\r\n  }\r\n  return element;\r\n}\r\n\r\nclass Padding {\r\n  constructor(template) {\r\n    this.element = generateElement(template);\r\n    this.cache = new Cache();\r\n  }\r\n\r\n  height() {\r\n    return this.element.height.apply(this.element, arguments);\r\n  }\r\n}\r\n\r\nexport default Padding;\n\n\n// WEBPACK FOOTER //\n// ./src/modules/padding.js","class Adapter {\r\n\r\n  constructor($scope, $parse, $attr, viewport, buffer, doAdjust, reload) {\r\n    this.$parse = $parse;\r\n    this.$attr = $attr;\r\n    this.viewport = viewport;\r\n    this.buffer = buffer;\r\n\r\n    this.doAdjust = doAdjust;\r\n    this.reload = reload;\r\n\r\n    this.isLoading = false;\r\n    this.disabled = false;\r\n\r\n    const viewportScope = viewport.getScope();\r\n    this.startScope = viewportScope.$parent ? viewportScope : $scope;\r\n\r\n    this.publicContext = {};\r\n    this.assignAdapter($attr.adapter);\r\n    this.generatePublicContext();\r\n  }\r\n\r\n  assignAdapter(adapterAttr) {\r\n    if (!adapterAttr || !(adapterAttr = adapterAttr.replace(/^\\s+|\\s+$/gm, ''))) {\r\n      return;\r\n    }\r\n    let adapterOnScope;\r\n\r\n    try {\r\n      this.$parse(adapterAttr).assign(this.startScope, {});\r\n      adapterOnScope = this.$parse(adapterAttr)(this.startScope);\r\n    }\r\n    catch (error) {\r\n      error.message = `Angular ui-scroll Adapter assignment exception.\\n` +\r\n        `Can't parse \"${adapterAttr}\" expression.\\n` +\r\n        error.message;\r\n      throw error;\r\n    }\r\n\r\n    angular.extend(adapterOnScope, this.publicContext);\r\n    this.publicContext = adapterOnScope;\r\n  }\r\n\r\n  generatePublicContext() {\r\n    // these methods will be accessible out of ui-scroll via user defined adapter\r\n    const publicMethods = ['reload', 'applyUpdates', 'append', 'prepend', 'isBOF', 'isEOF', 'isEmpty'];\r\n    for (let i = publicMethods.length - 1; i >= 0; i--) {\r\n      this.publicContext[publicMethods[i]] = this[publicMethods[i]].bind(this);\r\n    }\r\n\r\n    // these read-only props will be accessible out of ui-scroll via user defined adapter\r\n    const publicProps = ['isLoading', 'topVisible', 'topVisibleElement', 'topVisibleScope', 'bottomVisible', 'bottomVisibleElement', 'bottomVisibleScope'];\r\n    for (let i = publicProps.length - 1; i >= 0; i--) {\r\n      let property, attr = this.$attr[publicProps[i]];\r\n      Object.defineProperty(this, publicProps[i], {\r\n        get: () => property,\r\n        set: (value) => {\r\n          property = value;\r\n          this.publicContext[publicProps[i]] = value;\r\n          if (attr) {\r\n            this.$parse(attr).assign(this.startScope, value);\r\n          }\r\n        }\r\n      });\r\n    }\r\n\r\n    // non-read-only public property\r\n    Object.defineProperty(this.publicContext, 'disabled', {\r\n      get: () => this.disabled,\r\n      set: (value) => (!(this.disabled = value)) ? 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\ No newline at end of file
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\t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n 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JQLiteExtras from './modules/jqLiteExtras';\nimport ElementRoutines from './modules/elementRoutines.js';\nimport ScrollBuffer from './modules/buffer.js';\nimport Viewport from './modules/viewport.js';\nimport Adapter from './modules/adapter.js';\n\nangular.module('ui.scroll', [])\n\n  .constant('JQLiteExtras', JQLiteExtras)\n  .run(['JQLiteExtras', (JQLiteExtras) => {\n    !window.jQuery ? (new JQLiteExtras()).registerFor(angular.element) : null;\n    ElementRoutines.addCSSRules();\n  }])\n\n  .directive('uiScrollViewport', function () {\n    return {\n      restrict: 'A',\n      controller: [\n        '$scope',\n        '$element',\n        function (scope, element) {\n          this.container = element;\n          this.viewport = element;\n          this.scope = scope;\n\n          angular.forEach(element.children(), child => {\n            if (child.tagName.toLowerCase() === 'tbody') {\n              this.viewport = angular.element(child);\n            }\n          });\n\n          return this;\n        }\n      ]\n    };\n  })\n\n  .directive('uiScroll', [\n    '$log',\n    '$injector',\n    '$rootScope',\n    '$timeout',\n    '$interval',\n    '$q',\n    '$parse',\n    function (console, $injector, $rootScope, $timeout, $interval, $q, $parse) {\n\n      return {\n        require: ['?^uiScrollViewport'],\n        restrict: 'A',\n        transclude: 'element',\n        priority: 1000,\n        terminal: true,\n        link: link\n      };\n\n      function link($scope, element, $attr, controllers, linker) {\n        const match = $attr.uiScroll.match(/^\\s*(\\w+)\\s+in\\s+([(\\w|\\$)\\.]+)\\s*$/);\n        if (!match) {\n          throw new Error('Expected uiScroll in form of \\'_item_ in _datasource_\\' but got \\'' + $attr.uiScroll + '\\'');\n        }\n\n        function parseNumericAttr(value, defaultValue) {\n          const result = $parse(value)($scope);\n          return isNaN(result) ? defaultValue : result;\n        }\n\n        const BUFFER_MIN = 3;\n        const BUFFER_DEFAULT = 10;\n        const PADDING_MIN = 0.01;\n        const PADDING_DEFAULT = 0.5;\n        const MAX_VIEWPORT_DELAY = 500;\n        const VIEWPORT_POLLING_INTERVAL = 50;\n\n        let datasource = null;\n        const itemName = match[1];\n        const datasourceName = match[2];\n        const viewportController = controllers[0];\n        const bufferSize = Math.max(BUFFER_MIN, parseNumericAttr($attr.bufferSize, BUFFER_DEFAULT));\n        const padding = Math.max(PADDING_MIN, parseNumericAttr($attr.padding, PADDING_DEFAULT));\n        let startIndex = parseNumericAttr($attr.startIndex, 1);\n        let ridActual = 0; // current data revision id\n        let pending = [];\n\n        const elementRoutines = new ElementRoutines($injector, $q);\n        const buffer = new ScrollBuffer(elementRoutines, bufferSize, startIndex);\n        const viewport = new Viewport(elementRoutines, buffer, element, viewportController, $rootScope, padding);\n        const adapter = new Adapter($scope, $parse, $attr, viewport, buffer, doAdjust, reload);\n\n        if (viewportController) {\n          viewportController.adapter = adapter;\n        }\n\n        const isDatasourceValid = () =>\n          Object.prototype.toString.call(datasource) === '[object Object]' && typeof datasource.get === 'function';\n\n        datasource = $parse(datasourceName)($scope); // try to get datasource on scope\n        if (!isDatasourceValid()) {\n          datasource = $injector.get(datasourceName); // try to inject datasource as service\n          if (!isDatasourceValid()) {\n            throw new Error(datasourceName + ' is not a valid datasource');\n          }\n        }\n\n        let onRenderHandlers = [];\n        function onRenderHandlersRunner() {\n          onRenderHandlers.forEach(handler => handler.run());\n          onRenderHandlers = [];\n        }\n        function persistDatasourceIndex(datasource, propName) {\n          let getter;\n          // need to postpone min/maxIndexUser processing if the view is empty\n          if(angular.isNumber(datasource[propName])) {\n            getter = datasource[propName];\n            if(angular.isNumber(getter)) {\n              onRenderHandlers = onRenderHandlers.filter(handler => handler.id !== propName);\n              onRenderHandlers.push({\n                id: propName,\n                run: () => datasource[propName] = getter\n              });\n            }\n          }\n        }\n\n        function defineDatasourceIndex(datasource, propName, propUserName) {\n          const descriptor = Object.getOwnPropertyDescriptor(datasource, propName);\n          if (descriptor && (descriptor.set || descriptor.get)) {\n            return;\n          }\n          let getter;\n          persistDatasourceIndex(datasource, propName);\n          Object.defineProperty(datasource, propName, {\n            set: (value) => {\n              getter = value;\n              if(pending.length && !buffer.length) {\n                persistDatasourceIndex(datasource, propName);\n                return;\n              }\n              buffer[propUserName] = value;\n              const topPaddingHeightOld = viewport.topDataPos();\n              viewport.adjustPaddings();\n              if (propName === 'minIndex') {\n                viewport.onAfterMinIndexSet(topPaddingHeightOld);\n              }\n            },\n            get: () => getter\n          });\n        }\n\n        defineDatasourceIndex(datasource, 'minIndex', 'minIndexUser');\n        defineDatasourceIndex(datasource, 'maxIndex', 'maxIndexUser');\n\n        const fetchNext = (datasource.get.length !== 2) ?\n          (success) => datasource.get(buffer.next, bufferSize, success) :\n          (success) => {\n            datasource.get({\n              index: buffer.next,\n              append: buffer.length ? buffer[buffer.length - 1].item : void 0,\n              count: bufferSize\n            }, success);\n          };\n\n        const fetchPrevious = (datasource.get.length !== 2) ?\n          (success) => datasource.get(buffer.first - bufferSize, bufferSize, success) :\n          (success) => {\n            datasource.get({\n              index: buffer.first - bufferSize,\n              prepend: buffer.length ? buffer[0].item : void 0,\n              count: bufferSize\n            }, success);\n          };\n\n        const initialize = () => {\n          let tryCount = 0;\n          if(!viewport.applyContainerStyle()) {\n            const timer = $interval(() => {\n              tryCount++;\n              if(viewport.applyContainerStyle()) {\n                $interval.cancel(timer);\n                doAdjust();\n              }\n              if(tryCount * VIEWPORT_POLLING_INTERVAL >= MAX_VIEWPORT_DELAY) {\n                $interval.cancel(timer);\n                throw Error(`ui-scroll directive requires a viewport with non-zero height in ${MAX_VIEWPORT_DELAY}ms`);\n              }\n            }, VIEWPORT_POLLING_INTERVAL);\n          }\n          else {\n            doAdjust();\n          }\n        };\n\n        /**\n         * Build padding elements\n         *\n         * Calling linker is the only way I found to get access to the tag name of the template\n         * to prevent the directive scope from pollution a new scope is created and destroyed\n         * right after the builder creation is completed\n         */\n        linker((clone, scope) => {\n          viewport.createPaddingElements(clone[0]);\n          // we do not include the clone in the DOM. It means that the nested directives will not\n          // be able to reach the parent directives, but in this case it is intentional because we\n          // created the clone to access the template tag name\n          scope.$destroy();\n          clone.remove();\n        });\n\n        $scope.$on('$destroy', () => {\n          unbindEvents();\n          viewport.unbind('mousewheel', wheelHandler);\n        });\n\n        viewport.bind('mousewheel', wheelHandler);\n\n        initialize();\n\n        /* Private function definitions */\n\n        function isInvalid(rid) {\n          return (rid && rid !== ridActual) || $scope.$$destroyed;\n        }\n\n        function bindEvents() {\n          viewport.bind('resize', resizeAndScrollHandler);\n          viewport.bind('scroll', resizeAndScrollHandler);\n        }\n\n        function unbindEvents() {\n          viewport.unbind('resize', resizeAndScrollHandler);\n          viewport.unbind('scroll', resizeAndScrollHandler);\n        }\n\n        function reload() {\n          viewport.resetTopPadding();\n          viewport.resetBottomPadding();\n          if (arguments.length) {\n            startIndex = arguments[0];\n          }\n          buffer.reset(startIndex);\n          persistDatasourceIndex(datasource, 'minIndex');\n          persistDatasourceIndex(datasource, 'maxIndex');\n          doAdjust();\n        }\n\n        function isElementVisible(wrapper) {\n          return wrapper.element.height() && wrapper.element[0].offsetParent;\n        }\n\n        function visibilityWatcher(wrapper) {\n          if (isElementVisible(wrapper)) {\n            buffer.forEach((item) => {\n              if (typeof item.unregisterVisibilityWatcher === 'function') {\n                item.unregisterVisibilityWatcher();\n                delete item.unregisterVisibilityWatcher;\n              }\n            });\n            if (!pending.length) {\n              $timeout(() => doAdjust());\n            }\n          }\n        }\n\n        function insertWrapperContent(wrapper, insertAfter) {\n          createElement(wrapper, insertAfter, viewport.insertElement);\n          if (!isElementVisible(wrapper)) {\n            wrapper.unregisterVisibilityWatcher = wrapper.scope.$watch(() => visibilityWatcher(wrapper));\n          }\n          elementRoutines.hideElement(wrapper); // hide inserted elements before data binding\n        }\n\n        function createElement(wrapper, insertAfter, insertElement) {\n          let promises = null;\n          const sibling = (insertAfter > 0) ? buffer[insertAfter - 1].element : undefined;\n          linker((clone, scope) => {\n            promises = insertElement(clone, sibling);\n            wrapper.element = clone;\n            wrapper.scope = scope;\n            scope[itemName] = wrapper.item;\n          });\n          // ui-scroll-grid apply\n          if (adapter.transform) {\n            const tdInitializer = wrapper.scope.uiScrollTdInitializer;\n            if (tdInitializer && tdInitializer.linking) {\n              adapter.transform(wrapper.scope, wrapper.element);\n            } else {\n              wrapper.scope.uiScrollTdInitializer = {\n                onLink: () => adapter.transform(wrapper.scope, wrapper.element),\n                scope: wrapper.scope\n              };\n            }\n          }\n          return promises;\n        }\n\n        function updateDOM() {\n          let promises = [];\n          const toBePrepended = [];\n          const toBeRemoved = [];\n          const inserted = [];\n\n          buffer.forEach((wrapper, i) => {\n            switch (wrapper.op) {\n              case 'prepend':\n                toBePrepended.unshift(wrapper);\n                break;\n              case 'append':\n                insertWrapperContent(wrapper, i);\n                wrapper.op = 'none';\n                inserted.push(wrapper);\n                break;\n              case 'insert':\n                promises = promises.concat(createElement(wrapper, i, viewport.insertElementAnimated));\n                wrapper.op = 'none';\n                inserted.push(wrapper);\n                break;\n              case 'remove':\n                toBeRemoved.push(wrapper);\n            }\n          });\n\n          toBeRemoved.forEach((wrapper) => promises = promises.concat(viewport.removeItem(wrapper)));\n\n          if (toBePrepended.length)\n            toBePrepended.forEach((wrapper) => {\n              insertWrapperContent(wrapper);\n              wrapper.op = 'none';\n            });\n\n          buffer.forEach((item, i) => item.scope.$index = buffer.first + i);\n\n          return {\n            prepended: toBePrepended,\n            removed: toBeRemoved,\n            inserted: inserted,\n            animated: promises\n          };\n\n        }\n\n        function updatePaddings(rid, updates) {\n          // schedule another doAdjust after animation completion\n          if (updates.animated.length) {\n            $q.all(updates.animated).then(() => {\n              viewport.adjustPaddings();\n              doAdjust(rid);\n            });\n          } else {\n            viewport.adjustPaddings();\n          }\n        }\n\n        function enqueueFetch(rid, updates) {\n          if (viewport.shouldLoadBottom()) {\n            if (!updates || buffer.effectiveHeight(updates.inserted) > 0) {\n              // this means that at least one item appended in the last batch has height > 0\n              if (pending.push(true) === 1) {\n                adapter.loading(true);\n                fetch(rid);\n              }\n            }\n          } else if (viewport.shouldLoadTop()) {\n            if ((!updates || buffer.effectiveHeight(updates.prepended) > 0) || pending[0]) {\n              // this means that at least one item appended in the last batch has height > 0\n              // pending[0] = true means that previous fetch was appending. We need to force at least one prepend\n              // BTW there will always be at least 1 element in the pending array because bottom is fetched first\n              if (pending.push(false) === 1) {\n                adapter.loading(true);\n                fetch(rid);\n              }\n            }\n          }\n        }\n\n        function processUpdates() {\n          const updates = updateDOM();\n\n          // We need the item bindings to be processed before we can do adjustments\n          !$scope.$$phase && !$rootScope.$$phase && $scope.$digest();\n\n          updates.inserted.forEach(w => elementRoutines.showElement(w));\n          updates.prepended.forEach(w => elementRoutines.showElement(w));\n          return updates;\n        }\n\n        function doAdjust(rid) {\n          if (!rid) { // dismiss pending requests\n            pending = [];\n            rid = ++ridActual;\n          }\n\n          const updates = processUpdates();\n\n          if (isInvalid(rid)) {\n            return;\n          }\n\n          updatePaddings(rid, updates);\n          enqueueFetch(rid);\n\n          if (!pending.length) {\n            adapter.calculateProperties();\n          }\n        }\n\n        function doAdjustAfterFetch(rid) {\n          const updates = processUpdates();\n\n          viewport.onAfterPrepend(updates);\n\n          if (isInvalid(rid)) {\n            return;\n          }\n\n          updatePaddings(rid, updates);\n          onRenderHandlersRunner();\n          enqueueFetch(rid, updates);\n          pending.shift();\n\n          if (pending.length)\n            fetch(rid);\n          else {\n            adapter.loading(false);\n            bindEvents();\n            adapter.calculateProperties();\n          }\n        }\n\n        function fetch(rid) {\n          if (pending[0]) {// scrolling down\n            if (buffer.length && !viewport.shouldLoadBottom()) {\n              doAdjustAfterFetch(rid);\n            } else {\n              fetchNext((result) => {\n                if (isInvalid(rid)) {\n                  return;\n                }\n\n                if (result.length < bufferSize) {\n                  buffer.eof = true;\n                }\n\n                if (result.length > 0) {\n                  viewport.clipTop();\n                  buffer.append(result);\n                }\n\n                doAdjustAfterFetch(rid);\n              });\n            }\n          } else {  // scrolling up\n            if (buffer.length && !viewport.shouldLoadTop()) {\n              doAdjustAfterFetch(rid);\n            } else {\n              fetchPrevious((result) => {\n                if (isInvalid(rid)) {\n                  return;\n                }\n\n                if (result.length < bufferSize) {\n                  buffer.bof = true;\n                  // log 'bof is reached'\n                }\n\n                if (result.length > 0) {\n                  if (buffer.length) {\n                    viewport.clipBottom();\n                  }\n                  buffer.prepend(result);\n                }\n\n                doAdjustAfterFetch(rid);\n              });\n            }\n          }\n        }\n\n        function resizeAndScrollHandler(ev) {\n          if ($rootScope.$$phase || adapter.isLoading || adapter.disabled) {\n            return;\n          }\n\n          if (ev.type === 'scroll') {\n            // Don't process scroll event if it was triggered by us setting scrollTop.\n            if (viewport[0].scrollTop === viewport.scrollTopValue) {\n              return false;\n            }\n\n            // Check if we tried to set scrollTop and it failed. If that happens, don't prepend more items based on the stale value\n            // of scrollTop that will be used by shouldLoadTop(). Also, try to set it again.\n            viewport.scrollTopSetFailed = false;\n            if (viewport.scrollTopValue != null) {\n              const curScrollTop = viewport[0].scrollTop;\n              if (Math.abs(curScrollTop - viewport.scrollTopValue) > Math.abs(curScrollTop - viewport.scrollTopBeforeSet)) {\n                viewport.scrollTopSetFailed = true;\n                viewport.scrollTop(curScrollTop - viewport.scrollTopAdjust);\n              }\n            }\n          }\n\n          enqueueFetch(ridActual);\n\n          // we got a real scroll event, so browser is now in charge of scrollTop\n          viewport.scrollTopValue = null;\n\n          if (pending.length) {\n            unbindEvents();\n          } else {\n            adapter.calculateProperties();\n            !$scope.$$phase && $scope.$digest();\n          }\n        }\n\n        function wheelHandler(event) {\n          if (!adapter.disabled) {\n            const scrollTop = viewport[0].scrollTop;\n            const yMax = viewport[0].scrollHeight - viewport[0].clientHeight;\n\n            if ((scrollTop === 0 && !buffer.bof) || (scrollTop === yMax && !buffer.eof)) {\n              event.preventDefault();\n            }\n          }\n        }\n      }\n\n    }\n  ]);\n\n\n\n// WEBPACK FOOTER //\n// ./src/ui-scroll.js","/*!\r\n globals: angular, window\r\n List of used element methods available in JQuery but not in JQuery Lite\r\n element.before(elem)\r\n element.height()\r\n element.outerHeight(true)\r\n element.height(value) = only for Top/Bottom padding elements\r\n element.scrollTop()\r\n element.scrollTop(value)\r\n */\r\n\r\nexport default class JQLiteExtras {\r\n\r\n  registerFor(element) {\r\n    let convertToPx, css, getStyle, isWindow;\r\n    // angular implementation blows up if elem is the window\r\n    css = angular.element.prototype.css;\r\n\r\n    element.prototype.css = function (name, value) {\r\n      let self = this;\r\n      let elem = self[0];\r\n      if (!(!elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style)) {\r\n        return css.call(self, name, value);\r\n      }\r\n    };\r\n\r\n    // as defined in angularjs v1.0.5\r\n    isWindow = (obj) => obj && obj.document && obj.location && obj.alert && obj.setInterval;\r\n\r\n    function scrollTo(self, direction, value) {\r\n      let elem = self[0];\r\n      let [method, prop, preserve] = {\r\n        top: [\r\n          'scrollTop',\r\n          'pageYOffset',\r\n          'scrollLeft'\r\n        ],\r\n        left: [\r\n          'scrollLeft',\r\n          'pageXOffset',\r\n          'scrollTop'\r\n        ]\r\n      }[direction];\r\n\r\n      const isValueDefined = typeof value !== 'undefined';\r\n      if (isWindow(elem)) {\r\n        if (isValueDefined) {\r\n          return elem.scrollTo(self[preserve].call(self), value);\r\n        }\r\n        return (prop in elem) ? elem[prop] : elem.document.documentElement[method];\r\n      } else {\r\n        if (isValueDefined) {\r\n          elem[method] = value;\r\n        }\r\n        return elem[method];\r\n      }\r\n    }\r\n\r\n    if (window.getComputedStyle) {\r\n      getStyle = (elem) => window.getComputedStyle(elem, null);\r\n      convertToPx = (elem, value) => parseFloat(value);\r\n    } else {\r\n      getStyle = (elem) => elem.currentStyle;\r\n      convertToPx = (elem, value) => {\r\n        let left, result, rs, rsLeft, style;\r\n        let core_pnum = /[+-]?(?:\\d*\\.|)\\d+(?:[eE][+-]?\\d+|)/.source;\r\n        let rnumnonpx = new RegExp('^(' + core_pnum + ')(?!px)[a-z%]+$', 'i');\r\n\r\n        if (!rnumnonpx.test(value)) {\r\n          return parseFloat(value);\r\n        }\r\n\r\n        // ported from JQuery\r\n        style = elem.style;\r\n        left = style.left;\r\n        rs = elem.runtimeStyle;\r\n        rsLeft = rs && rs.left;\r\n        if (rs) {\r\n          rs.left = style.left;\r\n        }\r\n        // put in the new values to get a computed style out\r\n        style.left = value;\r\n        result = style.pixelLeft;\r\n        style.left = left;\r\n        if (rsLeft) {\r\n          rs.left = rsLeft;\r\n        }\r\n        return result;\r\n      };\r\n    }\r\n\r\n    function getMeasurements(elem, measure) {\r\n      let base, borderA, borderB, computedMarginA, computedMarginB, computedStyle, dirA, dirB, marginA, marginB, paddingA, paddingB;\r\n\r\n      if (isWindow(elem)) {\r\n        base = document.documentElement[{height: 'clientHeight', width: 'clientWidth'}[measure]];\r\n\r\n        return {\r\n          base: base,\r\n          padding: 0,\r\n          border: 0,\r\n          margin: 0\r\n        };\r\n      }\r\n\r\n      // Start with offset property\r\n      [\r\n        base,\r\n        dirA,\r\n        dirB\r\n      ] = {\r\n        width: [\r\n          elem.offsetWidth,\r\n          'Left',\r\n          'Right'\r\n        ],\r\n        height: [\r\n          elem.offsetHeight,\r\n          'Top',\r\n          'Bottom'\r\n        ]\r\n      }[measure];\r\n\r\n      computedStyle = getStyle(elem);\r\n      paddingA = convertToPx(elem, computedStyle['padding' + dirA]) || 0;\r\n      paddingB = convertToPx(elem, computedStyle['padding' + dirB]) || 0;\r\n      borderA = convertToPx(elem, computedStyle['border' + dirA + 'Width']) || 0;\r\n      borderB = convertToPx(elem, computedStyle['border' + dirB + 'Width']) || 0;\r\n      computedMarginA = computedStyle['margin' + dirA];\r\n      computedMarginB = computedStyle['margin' + dirB];\r\n\r\n      // I do not care for width for now, so this hack is irrelevant\r\n      // if ( !supportsPercentMargin )\r\n      // computedMarginA = hackPercentMargin( elem, computedStyle, computedMarginA )\r\n      // computedMarginB = hackPercentMargin( elem, computedStyle, computedMarginB )\r\n      marginA = convertToPx(elem, computedMarginA) || 0;\r\n      marginB = convertToPx(elem, computedMarginB) || 0;\r\n\r\n      return {\r\n        base: base,\r\n        padding: paddingA + paddingB,\r\n        border: borderA + borderB,\r\n        margin: marginA + marginB\r\n      };\r\n    }\r\n\r\n    function getWidthHeight(elem, direction, measure) {\r\n      let computedStyle, result;\r\n\r\n      let measurements = getMeasurements(elem, direction);\r\n\r\n      if (measurements.base > 0) {\r\n        return {\r\n          base: measurements.base - measurements.padding - measurements.border,\r\n          outer: measurements.base,\r\n          outerfull: measurements.base + measurements.margin\r\n        }[measure];\r\n      }\r\n\r\n      // Fall back to computed then uncomputed css if necessary\r\n      computedStyle = getStyle(elem);\r\n      result = computedStyle[direction];\r\n\r\n      if (result < 0 || result === null) {\r\n        result = elem.style[direction] || 0;\r\n      }\r\n\r\n      // Normalize \"\", auto, and prepare for extra\r\n      result = parseFloat(result) || 0;\r\n\r\n      return {\r\n        base: result - measurements.padding - measurements.border,\r\n        outer: result,\r\n        outerfull: result + measurements.padding + measurements.border + measurements.margin\r\n      }[measure];\r\n    }\r\n\r\n    // define missing methods\r\n    return angular.forEach({\r\n      before(newElem) {\r\n        var children, elem, i, j, parent, ref, self;\r\n        self = this;\r\n        elem = self[0];\r\n        parent = self.parent();\r\n        children = parent.contents();\r\n        if (children[0] === elem) {\r\n          return parent.prepend(newElem);\r\n        } else {\r\n          for (i = j = 1, ref = children.length - 1; 1 <= ref ? j <= ref : j >= ref; i = 1 <= ref ? ++j : --j) {\r\n            if (children[i] === elem) {\r\n              angular.element(children[i - 1]).after(newElem);\r\n              return;\r\n            }\r\n          }\r\n          throw new Error('invalid DOM structure ' + elem.outerHTML);\r\n        }\r\n      },\r\n      height (value){\r\n        var self;\r\n        self = this;\r\n        if (typeof value !== 'undefined') {\r\n          if (angular.isNumber(value)) {\r\n            value = value + 'px';\r\n          }\r\n          return css.call(self, 'height', value);\r\n        } else {\r\n          return getWidthHeight(this[0], 'height', 'base');\r\n        }\r\n      },\r\n      outerHeight(option) {\r\n        return getWidthHeight(this[0], 'height', option ? 'outerfull' : 'outer');\r\n      },\r\n      outerWidth(option) {\r\n        return getWidthHeight(this[0], 'width', option ? 'outerfull' : 'outer');\r\n      },\r\n\r\n      /*\r\n       The offset setter method is not implemented\r\n       */\r\n      offset(value) {\r\n        let docElem, win;\r\n        let self = this;\r\n        let box = {\r\n          top: 0,\r\n          left: 0\r\n        };\r\n        let elem = self[0];\r\n        let doc = elem && elem.ownerDocument;\r\n\r\n        if (arguments.length) {\r\n          if (value === undefined) {\r\n            return self;\r\n          }\r\n          // TODO: implement setter\r\n          throw new Error('offset setter method is not implemented');\r\n        }\r\n\r\n        if (!doc) {\r\n          return;\r\n        }\r\n\r\n        docElem = doc.documentElement;\r\n\r\n        // TODO: Make sure it's not a disconnected DOM node\r\n\r\n        if (elem.getBoundingClientRect != null) {\r\n          box = elem.getBoundingClientRect();\r\n        }\r\n\r\n        win = doc.defaultView || doc.parentWindow;\r\n\r\n        return {\r\n          top: box.top + (win.pageYOffset || docElem.scrollTop) - (docElem.clientTop || 0),\r\n          left: box.left + (win.pageXOffset || docElem.scrollLeft) - (docElem.clientLeft || 0)\r\n        };\r\n      },\r\n      scrollTop(value) {\r\n        return scrollTo(this, 'top', value);\r\n      },\r\n      scrollLeft(value) {\r\n        return scrollTo(this, 'left', value);\r\n      }\r\n    }, (value, key) => {\r\n      if (!element.prototype[key]) {\r\n        return element.prototype[key] = value;\r\n      }\r\n    });\r\n  }\r\n\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/jqLiteExtras.js","const hideClassToken = 'ng-ui-scroll-hide';\r\n\r\nexport default class ElementRoutines {\r\n\r\n  static addCSSRules() {\r\n    const selector = '.' + hideClassToken;\r\n    const rules = 'display: none';\r\n    const sheet = document.styleSheets[0];\r\n    let index;\r\n    try {\r\n      index = sheet.cssRules.length;\r\n    } catch (err) {\r\n      index = 0;\r\n    }\r\n    if('insertRule' in sheet) {\r\n      sheet.insertRule(selector + '{' + rules + '}', index);\r\n    }\r\n    else if('addRule' in sheet) {\r\n      sheet.addRule(selector, rules, index);\r\n    }\r\n  }\r\n\r\n  constructor($injector, $q) {\r\n    this.$animate = ($injector.has && $injector.has('$animate')) ? $injector.get('$animate') : null;\r\n    this.isAngularVersionLessThen1_3 = angular.version.major === 1 && angular.version.minor < 3;\r\n    this.$q = $q;\r\n  }\r\n\r\n  hideElement(wrapper) {\r\n    wrapper.element.addClass(hideClassToken);\r\n  }\r\n\r\n  showElement(wrapper) {\r\n    wrapper.element.removeClass(hideClassToken);\r\n  }\r\n\r\n  insertElement(newElement, previousElement) {\r\n    previousElement.after(newElement);\r\n    return [];\r\n  }\r\n\r\n  removeElement(wrapper) {\r\n    wrapper.element.remove();\r\n    wrapper.scope.$destroy();\r\n    return [];\r\n  }\r\n\r\n  insertElementAnimated(newElement, previousElement) {\r\n    if (!this.$animate) {\r\n      return this.insertElement(newElement, previousElement);\r\n    }\r\n\r\n    if (this.isAngularVersionLessThen1_3) {\r\n      const deferred = this.$q.defer();\r\n      // no need for parent - previous element is never null\r\n      this.$animate.enter(newElement, null, previousElement, () => deferred.resolve());\r\n\r\n      return [deferred.promise];\r\n    }\r\n\r\n    // no need for parent - previous element is never null\r\n    return [this.$animate.enter(newElement, null, previousElement)];\r\n  }\r\n\r\n  removeElementAnimated(wrapper) {\r\n    if (!this.$animate) {\r\n      return this.removeElement(wrapper);\r\n    }\r\n\r\n    if (this.isAngularVersionLessThen1_3) {\r\n      const deferred = this.$q.defer();\r\n      this.$animate.leave(wrapper.element, () => {\r\n        wrapper.scope.$destroy();\r\n        return deferred.resolve();\r\n      });\r\n\r\n      return [deferred.promise];\r\n    }\r\n\r\n    return [(this.$animate.leave(wrapper.element)).then(() => wrapper.scope.$destroy())];\r\n  }\r\n}\n\n\n// WEBPACK FOOTER //\n// ./src/modules/elementRoutines.js","export default function ScrollBuffer(elementRoutines, bufferSize, startIndex) {\r\n  const buffer = Object.create(Array.prototype);\r\n\r\n  angular.extend(buffer, {\r\n    size: bufferSize,\r\n\r\n    reset(startIndex) {\r\n      buffer.remove(0, buffer.length);\r\n      buffer.eof = false;\r\n      buffer.bof = false;\r\n      buffer.first = startIndex;\r\n      buffer.next = startIndex;\r\n      buffer.minIndex = startIndex;\r\n      buffer.maxIndex = startIndex;\r\n      buffer.minIndexUser = null;\r\n      buffer.maxIndexUser = null;\r\n    },\r\n\r\n    append(items) {\r\n      items.forEach((item) => {\r\n        ++buffer.next;\r\n        buffer.insert('append', item);\r\n      });\r\n      buffer.maxIndex = buffer.eof ? buffer.next - 1 : Math.max(buffer.next - 1, buffer.maxIndex);\r\n    },\r\n\r\n    prepend(items) {\r\n      items.reverse().forEach((item) => {\r\n        --buffer.first;\r\n        buffer.insert('prepend', item);\r\n      });\r\n      buffer.minIndex = buffer.bof ? buffer.minIndex = buffer.first : Math.min(buffer.first, buffer.minIndex);\r\n    },\r\n\r\n    /**\r\n     * inserts wrapped element in the buffer\r\n     * the first argument is either operation keyword (see below) or a number for operation 'insert'\r\n     * for insert the number is the index for the buffer element the new one have to be inserted after\r\n     * operations: 'append', 'prepend', 'insert', 'remove', 'update', 'none'\r\n     */\r\n    insert(operation, item, isTop) {\r\n      const wrapper = {\r\n        item: item\r\n      };\r\n\r\n      if (operation % 1 === 0) {// it is an insert\r\n        wrapper.op = 'insert';\r\n        buffer.splice(operation, 0, wrapper);\r\n        if(isTop) {\r\n          buffer.first--;\r\n        }\r\n        else {\r\n          buffer.next++;\r\n        }\r\n      } else {\r\n        wrapper.op = operation;\r\n        switch (operation) {\r\n          case 'append':\r\n            buffer.push(wrapper);\r\n            break;\r\n          case 'prepend':\r\n            buffer.unshift(wrapper);\r\n            break;\r\n        }\r\n      }\r\n    },\r\n\r\n    // removes elements from buffer\r\n    remove(arg1, arg2) {\r\n      if (angular.isNumber(arg1)) {\r\n        // removes items from arg1 (including) through arg2 (excluding)\r\n        for (let i = arg1; i < arg2; i++) {\r\n          elementRoutines.removeElement(buffer[i]);\r\n        }\r\n        return buffer.splice(arg1, arg2 - arg1);\r\n      }\r\n      // removes single item(wrapper) from the buffer\r\n      buffer.splice(buffer.indexOf(arg1), 1);\r\n      if(arg1._op === 'isTop' && buffer.first === this.getAbsMinIndex()) {\r\n        this.incrementMinIndex();\r\n      }\r\n      else {\r\n        this.decrementMaxIndex();\r\n      }\r\n      if(arg1._op === 'isTop') {\r\n        buffer.first++;\r\n      }\r\n      else {\r\n        buffer.next--;\r\n      }\r\n      if(!buffer.length) {\r\n        buffer.first = 1;\r\n        buffer.next = 1;\r\n      }\r\n\r\n      return elementRoutines.removeElementAnimated(arg1);\r\n    },\r\n\r\n    incrementMinIndex() {\r\n      if(buffer.minIndexUser !== null) {\r\n        if(buffer.minIndex > buffer.minIndexUser) {\r\n          buffer.minIndexUser++;\r\n          return;\r\n        }\r\n        if(buffer.minIndex === buffer.minIndexUser) {\r\n          buffer.minIndexUser++;\r\n        }\r\n      }\r\n      buffer.minIndex++;\r\n    },\r\n\r\n    decrementMaxIndex() {\r\n      if(buffer.maxIndexUser !== null && buffer.maxIndex <= buffer.maxIndexUser) {\r\n        buffer.maxIndexUser--;\r\n      }\r\n      buffer.maxIndex--;\r\n    },\r\n\r\n    getAbsMinIndex() {\r\n      if(buffer.minIndexUser !== null) {\r\n        return Math.min(buffer.minIndexUser, buffer.minIndex);\r\n      }\r\n      return buffer.minIndex;\r\n    },\r\n\r\n    getAbsMaxIndex() {\r\n      if(buffer.maxIndexUser !== null) {\r\n        return Math.max(buffer.maxIndexUser, buffer.maxIndex);\r\n      }\r\n      return buffer.maxIndex;\r\n    },\r\n\r\n    effectiveHeight(elements) {\r\n      if (!elements.length) {\r\n        return 0;\r\n      }\r\n      let top = Number.MAX_VALUE;\r\n      let bottom = Number.NEGATIVE_INFINITY;\r\n      elements.forEach((wrapper) => {\r\n        if (wrapper.element[0].offsetParent) {\r\n          // element style is not display:none\r\n          top = Math.min(top, wrapper.element.offset().top);\r\n          bottom = Math.max(bottom, wrapper.element.offset().top + wrapper.element.outerHeight(true));\r\n        }\r\n      });\r\n      return Math.max(0, bottom - top);\r\n    }\r\n\r\n  });\r\n\r\n  buffer.reset(startIndex);\r\n\r\n  return buffer;\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/buffer.js","import Padding from './padding';\r\n\r\nexport default function Viewport(elementRoutines, buffer, element, viewportController, $rootScope, padding) {\r\n  let topPadding = null;\r\n  let bottomPadding = null;\r\n  const viewport = viewportController && viewportController.viewport ? viewportController.viewport : angular.element(window);\r\n  const container = viewportController && viewportController.container ? viewportController.container : undefined;\r\n  const scope = viewportController && viewportController.scope ? viewportController.scope : $rootScope;\r\n\r\n  viewport.css({\r\n    'overflow-anchor': 'none',\r\n    'overflow-y': 'auto',\r\n    'display': 'block'\r\n  });\r\n\r\n  viewport.scrollTopOriginal = viewport.scrollTopOriginal || viewport.scrollTop;\r\n  viewport.scrollTopBeforeSet = null;\r\n  viewport.scrollTopValue = null;\r\n\r\n  function bufferPadding() {\r\n    return viewport.outerHeight() * padding; // some extra space to initiate preload\r\n  }\r\n\r\n  angular.extend(viewport, {\r\n    getScope() {\r\n      return scope;\r\n    },\r\n\r\n    scrollTop() {\r\n      if (typeof arguments[0] !== 'undefined') {\r\n        viewport.scrollTopBeforeSet = viewport.scrollTop();\r\n        viewport.scrollTopValue = arguments[0];\r\n      }\r\n      return viewport.scrollTopOriginal.apply(viewport, arguments);\r\n    },\r\n\r\n    createPaddingElements(template) {\r\n      topPadding = new Padding(template);\r\n      bottomPadding = new Padding(template);\r\n      element.before(topPadding.element);\r\n      element.after(bottomPadding.element);\r\n      topPadding.height(0);\r\n      bottomPadding.height(0);\r\n    },\r\n\r\n    applyContainerStyle() {\r\n      if (!container) {\r\n        return true;\r\n      }\r\n      if(container !== viewport) {\r\n        viewport.css('height', window.getComputedStyle(container[0]).height);\r\n      }\r\n      return viewport.height() > 0;\r\n    },\r\n\r\n    bottomDataPos() {\r\n      let scrollHeight = viewport[0].scrollHeight;\r\n      scrollHeight = scrollHeight != null ? scrollHeight : viewport[0].document.documentElement.scrollHeight;\r\n      return scrollHeight - bottomPadding.height();\r\n    },\r\n\r\n    topDataPos() {\r\n      return topPadding.height();\r\n    },\r\n\r\n    bottomVisiblePos() {\r\n      return viewport.scrollTop() + viewport.outerHeight();\r\n    },\r\n\r\n    topVisiblePos() {\r\n      return viewport.scrollTop();\r\n    },\r\n\r\n    insertElement(e, sibling) {\r\n      return elementRoutines.insertElement(e, sibling || topPadding.element);\r\n    },\r\n\r\n    insertElementAnimated(e, sibling) {\r\n      return elementRoutines.insertElementAnimated(e, sibling || topPadding.element);\r\n    },\r\n\r\n    shouldLoadBottom() {\r\n      return !buffer.eof && viewport.bottomDataPos() < viewport.bottomVisiblePos() + bufferPadding();\r\n    },\r\n\r\n    clipBottom() {\r\n      // clip the invisible items off the bottom\r\n      let overage = 0;\r\n      let overageHeight = 0;\r\n      let itemHeight = 0;\r\n      let emptySpaceHeight = viewport.bottomDataPos() - viewport.bottomVisiblePos() - bufferPadding();\r\n\r\n      for (let i = buffer.length - 1; i >= 0; i--) {\r\n        itemHeight = buffer[i].element.outerHeight(true);\r\n        if (overageHeight + itemHeight > emptySpaceHeight) {\r\n          break;\r\n        }\r\n        bottomPadding.cache.add(buffer[i]);\r\n        overageHeight += itemHeight;\r\n        overage++;\r\n      }\r\n\r\n      if (overage > 0) {\r\n        buffer.eof = false;\r\n        buffer.remove(buffer.length - overage, buffer.length);\r\n        buffer.next -= overage;\r\n        viewport.adjustPaddings();\r\n      }\r\n    },\r\n\r\n    shouldLoadTop() {\r\n      return !buffer.bof && !viewport.scrollTopSetFailed && viewport.topDataPos() > viewport.topVisiblePos() - bufferPadding();\r\n    },\r\n\r\n    clipTop() {\r\n      // clip the invisible items off the top\r\n      let overage = 0;\r\n      let overageHeight = 0;\r\n      let itemHeight = 0;\r\n      let emptySpaceHeight = viewport.topVisiblePos() - viewport.topDataPos() - bufferPadding();\r\n\r\n      for (let i = 0; i < buffer.length; i++) {\r\n        itemHeight = buffer[i].element.outerHeight(true);\r\n        if (overageHeight + itemHeight > emptySpaceHeight) {\r\n          break;\r\n        }\r\n        topPadding.cache.add(buffer[i]);\r\n        overageHeight += itemHeight;\r\n        overage++;\r\n      }\r\n\r\n      if (overage > 0) {\r\n        // we need to adjust top padding element before items are removed from top\r\n        // to avoid strange behaviour of scroll bar during remove top items when we are at the very bottom\r\n        topPadding.height(topPadding.height() + overageHeight);\r\n        buffer.bof = false;\r\n        buffer.remove(0, overage);\r\n        buffer.first += overage;\r\n      }\r\n    },\r\n\r\n    adjustPaddings() {\r\n      if (!buffer.length) {\r\n        return;\r\n      }\r\n\r\n      // precise heights calculation based on items that are in buffer or that were in buffer once\r\n      const visibleItemsHeight = buffer.reduce((summ, item) => summ + item.element.outerHeight(true), 0);\r\n\r\n      let topPaddingHeight = 0, topCount = 0;\r\n      topPadding.cache.forEach(item => {\r\n        if(item.index < buffer.first) {\r\n          topPaddingHeight += item.height;\r\n          topCount++;\r\n        }\r\n      });\r\n\r\n      let bottomPaddingHeight = 0, bottomCount = 0;\r\n      bottomPadding.cache.forEach(item => {\r\n        if(item.index >= buffer.next) {\r\n          bottomPaddingHeight += item.height;\r\n          bottomCount++;\r\n        }\r\n      });\r\n\r\n      const totalHeight = visibleItemsHeight + topPaddingHeight + bottomPaddingHeight;\r\n      const averageItemHeight = totalHeight / (topCount + bottomCount + buffer.length);\r\n\r\n      // average heights calculation, items that have never been reached\r\n      let adjustTopPadding = buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser;\r\n      let adjustBottomPadding = buffer.maxIndexUser !== null && buffer.maxIndex < buffer.maxIndexUser;\r\n      let topPaddingHeightAdd = adjustTopPadding ? (buffer.minIndex - buffer.minIndexUser) * averageItemHeight : 0;\r\n      let bottomPaddingHeightAdd = adjustBottomPadding ? (buffer.maxIndexUser - buffer.maxIndex) * averageItemHeight : 0;\r\n\r\n      // paddings combine adjustment\r\n      topPadding.height(topPaddingHeight + topPaddingHeightAdd);\r\n      bottomPadding.height(bottomPaddingHeight + bottomPaddingHeightAdd);\r\n    },\r\n\r\n    onAfterMinIndexSet(topPaddingHeightOld) {\r\n      // additional scrollTop adjustment in case of datasource.minIndex external set\r\n      if (buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser) {\r\n        let diff = topPadding.height() - topPaddingHeightOld;\r\n        viewport.scrollTop(viewport.scrollTop() + diff);\r\n        while((diff -= viewport.scrollTop()) > 0) {\r\n          bottomPadding.height(bottomPadding.height() + diff);\r\n          viewport.scrollTop(viewport.scrollTop() + diff);\r\n        }\r\n      }\r\n    },\r\n\r\n    onAfterPrepend(updates) {\r\n      if (!updates.prepended.length)\r\n        return;\r\n      const height = buffer.effectiveHeight(updates.prepended);\r\n      const paddingHeight = topPadding.height() - height;\r\n      if (paddingHeight >= 0) {\r\n        topPadding.height(paddingHeight);\r\n      }\r\n      else {\r\n        topPadding.height(0);\r\n        viewport.scrollTopAdjust = paddingHeight;\r\n        viewport.scrollTop(viewport.scrollTop() - paddingHeight);\r\n      }\r\n    },\r\n\r\n    resetTopPadding() {\r\n      topPadding.height(0);\r\n      topPadding.cache.clear();\r\n    },\r\n\r\n    resetBottomPadding() {\r\n      bottomPadding.height(0);\r\n      bottomPadding.cache.clear();\r\n    },\r\n\r\n    removeCacheItem(item, isTop) {\r\n      topPadding.cache.remove(item, isTop);\r\n      bottomPadding.cache.remove(item, isTop);\r\n    },\r\n\r\n    removeItem(item) {\r\n      this.removeCacheItem(item);\r\n      return buffer.remove(item);\r\n    }\r\n  });\r\n\r\n  return viewport;\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/viewport.js","// Can't just extend the Array, due to Babel does not support built-in classes extending\r\n// This solution was taken from https://stackoverflow.com/questions/46897414/es6-class-extends-array-workaround-for-es5-babel-transpile\r\nclass CacheProto {\r\n  add(item) {\r\n    for (let i = this.length - 1; i >= 0; i--) {\r\n      if (this[i].index === item.scope.$index) {\r\n        this[i].height = item.element.outerHeight();\r\n        return;\r\n      }\r\n    }\r\n    this.push({\r\n      index: item.scope.$index,\r\n      height: item.element.outerHeight()\r\n    });\r\n    this.sort((a, b) => ((a.index < b.index) ? -1 : ((a.index > b.index) ? 1 : 0)));\r\n  }\r\n\r\n  remove(argument, _isTop) {\r\n    const index = argument % 1 === 0 ? argument : argument.scope.$index;\r\n    const isTop = argument % 1 === 0 ? _isTop : argument._op === 'isTop';\r\n    for (let i = this.length - 1; i >= 0; i--) {\r\n      if (this[i].index === index) {\r\n        this.splice(i, 1);\r\n        break;\r\n      }\r\n    }\r\n    if(!isTop) {\r\n      for (let i = this.length - 1; i >= 0; i--) {\r\n        if (this[i].index > index) {\r\n          this[i].index--;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  clear() {\r\n    this.length = 0;\r\n  }\r\n}\r\n\r\nfunction Cache() {\r\n  const instance = [];\r\n  instance.push.apply(instance, arguments);\r\n  Object.setPrototypeOf(instance, Cache.prototype);\r\n  return instance;\r\n}\r\nCache.prototype = Object.create(Array.prototype);\r\nObject.getOwnPropertyNames(CacheProto.prototype).forEach(methodName =>\r\n  Cache.prototype[methodName] = CacheProto.prototype[methodName]\r\n);\r\n\r\nfunction generateElement(template) {\r\n  if(template.nodeType !== Node.ELEMENT_NODE) {\r\n    throw new Error('ui-scroll directive requires an Element node for templating the view');\r\n  }\r\n  let element;\r\n  switch (template.tagName.toLowerCase()) {\r\n    case 'dl':\r\n      throw new Error(`ui-scroll directive does not support <${template.tagName}> as a repeating tag: ${template.outerHTML}`);\r\n    case 'tr':\r\n      let table = angular.element('<table><tr><td><div></div></td></tr></table>');\r\n      element = table.find('tr');\r\n      break;\r\n    case 'li':\r\n      element = angular.element('<li></li>');\r\n      break;\r\n    default:\r\n      element = angular.element('<div></div>');\r\n  }\r\n  return element;\r\n}\r\n\r\nclass Padding {\r\n  constructor(template) {\r\n    this.element = generateElement(template);\r\n    this.cache = new Cache();\r\n  }\r\n\r\n  height() {\r\n    return this.element.height.apply(this.element, arguments);\r\n  }\r\n}\r\n\r\nexport default Padding;\n\n\n// WEBPACK FOOTER //\n// ./src/modules/padding.js","class Adapter {\r\n\r\n  constructor($scope, $parse, $attr, viewport, buffer, doAdjust, reload) {\r\n    this.$parse = $parse;\r\n    this.$attr = $attr;\r\n    this.viewport = viewport;\r\n    this.buffer = buffer;\r\n\r\n    this.doAdjust = doAdjust;\r\n    this.reload = reload;\r\n\r\n    this.isLoading = false;\r\n    this.disabled = false;\r\n\r\n    const viewportScope = viewport.getScope();\r\n    this.startScope = viewportScope.$parent ? viewportScope : $scope;\r\n\r\n    this.publicContext = {};\r\n    this.assignAdapter($attr.adapter);\r\n    this.generatePublicContext();\r\n  }\r\n\r\n  assignAdapter(adapterAttr) {\r\n    if (!adapterAttr || !(adapterAttr = adapterAttr.replace(/^\\s+|\\s+$/gm, ''))) {\r\n      return;\r\n    }\r\n    let adapterOnScope;\r\n\r\n    try {\r\n      this.$parse(adapterAttr).assign(this.startScope, {});\r\n      adapterOnScope = this.$parse(adapterAttr)(this.startScope);\r\n    }\r\n    catch (error) {\r\n      error.message = `Angular ui-scroll Adapter assignment exception.\\n` +\r\n        `Can't parse \"${adapterAttr}\" expression.\\n` +\r\n        error.message;\r\n      throw error;\r\n    }\r\n\r\n    angular.extend(adapterOnScope, this.publicContext);\r\n    this.publicContext = adapterOnScope;\r\n  }\r\n\r\n  generatePublicContext() {\r\n    // these methods will be accessible out of ui-scroll via user defined adapter\r\n    const publicMethods = ['reload', 'applyUpdates', 'append', 'prepend', 'isBOF', 'isEOF', 'isEmpty', 'resetScrollTopCorrection'];\r\n    for (let i = publicMethods.length - 1; i >= 0; i--) {\r\n      this.publicContext[publicMethods[i]] = this[publicMethods[i]].bind(this);\r\n    }\r\n\r\n    // these read-only props will be accessible out of ui-scroll via user defined adapter\r\n    const publicProps = ['isLoading', 'topVisible', 'topVisibleElement', 'topVisibleScope', 'bottomVisible', 'bottomVisibleElement', 'bottomVisibleScope'];\r\n    for (let i = publicProps.length - 1; i >= 0; i--) {\r\n      let property, attr = this.$attr[publicProps[i]];\r\n      Object.defineProperty(this, publicProps[i], {\r\n        get: () => property,\r\n        set: (value) => {\r\n          property = value;\r\n          this.publicContext[publicProps[i]] = value;\r\n          if (attr) {\r\n            this.$parse(attr).assign(this.startScope, value);\r\n          }\r\n        }\r\n      });\r\n    }\r\n\r\n    // non-read-only public property\r\n    Object.defineProperty(this.publicContext, 'disabled', {\r\n      get: () => this.disabled,\r\n      set: (value) => (!(this.disabled = value)) ? this.doAdjust() : null\r\n    });\r\n  }\r\n\r\n  loading(value) {\r\n    this.isLoading = value;\r\n  }\r\n\r\n  isBOF() {\r\n    return this.buffer.bof;\r\n  }\r\n\r\n  isEOF() {\r\n    return this.buffer.eof;\r\n  }\r\n\r\n  isEmpty() {\r\n    return !this.buffer.length;\r\n  }\r\n\r\n  resetScrollTopCorrection() {\r\n    // is needed to scroll at negative area programmatically (e.g. tests)\r\n    this.viewport.scrollTopValue = null;\r\n  }\r\n\r\n  append(newItems) {\r\n    this.buffer.append(newItems);\r\n    this.doAdjust();\r\n    this.viewport.clipTop();\r\n    this.viewport.clipBottom();\r\n  }\r\n\r\n  prepend(newItems) {\r\n    this.buffer.prepend(newItems);\r\n    this.doAdjust();\r\n    this.viewport.clipTop();\r\n    this.viewport.clipBottom();\r\n  }\r\n\r\n  applyUpdates(arg1, arg2) {\r\n    if (typeof arg1 === 'function') {\r\n      this.applyUpdatesFunc(arg1);\r\n    } else {\r\n      this.applyUpdatesIndex(arg1, arg2);\r\n    }\r\n    this.doAdjust();\r\n  }\r\n\r\n  applyUpdatesFunc(cb) {\r\n    this.buffer.slice(0).forEach((wrapper) => {\r\n      // we need to do it on the buffer clone, because buffer content\r\n      // may change as we iterate through\r\n      this.applyUpdate(wrapper, cb(wrapper.item, wrapper.scope, wrapper.element));\r\n    });\r\n  }\r\n\r\n  applyUpdatesIndex(index, newItems) {\r\n    if (index % 1 !== 0) {\r\n      throw new Error('applyUpdates - ' + index + ' is not a valid index (should be an integer)');\r\n    }\r\n    const _index = index - this.buffer.first;\r\n\r\n    // apply updates only within buffer\r\n    if (_index >= 0 && _index < this.buffer.length) {\r\n      this.applyUpdate(this.buffer[_index], newItems);\r\n    }\r\n    // out-of-buffer case: deletion may affect Paddings\r\n    else if(index >= this.buffer.getAbsMinIndex() && index <= this.buffer.getAbsMaxIndex()) {\r\n      if(angular.isArray(newItems) && !newItems.length) {\r\n        this.viewport.removeCacheItem(index, index === this.buffer.minIndex);\r\n        if(index === this.buffer.getAbsMinIndex()) {\r\n          this.buffer.incrementMinIndex();\r\n        }\r\n        else {\r\n          this.buffer.decrementMaxIndex();\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  applyUpdate(wrapper, newItems) {\r\n    if (!angular.isArray(newItems)) {\r\n      return;\r\n    }\r\n    let position = this.buffer.indexOf(wrapper);\r\n    if (!newItems.reverse().some(newItem => newItem === wrapper.item)) {\r\n      wrapper.op = 'remove';\r\n      if(position === 0 && !newItems.length) {\r\n        wrapper._op = 'isTop'; // to catch \"first\" edge case on remove\r\n      }\r\n    }\r\n    newItems.forEach((newItem) => {\r\n      if (newItem === wrapper.item) {\r\n        position--;\r\n      } else {\r\n        // 3 parameter (isTop) is to catch \"first\" edge case on insert\r\n        this.buffer.insert(position + 1, newItem, position === -1);\r\n      }\r\n    });\r\n  }\r\n\r\n  calculateProperties() {\r\n    let rowTop = null, topHeight = 0;\r\n    let topDone = false, bottomDone = false;\r\n    const length = this.buffer.length;\r\n\r\n    for (let i = 0; i < length; i++) {\r\n      const item = this.buffer[i];\r\n      const itemTop = item.element.offset().top;\r\n\r\n      if (rowTop !== itemTop) { // a new row condition\r\n        const itemHeight = item.element.outerHeight(true);\r\n        const top = this.viewport.topDataPos() + topHeight + itemHeight;\r\n\r\n        if (!topDone && top > this.viewport.topVisiblePos()) {\r\n          topDone = true;\r\n          this['topVisible'] = item.item;\r\n          this['topVisibleElement'] = item.element;\r\n          this['topVisibleScope'] = item.scope;\r\n        }\r\n        if (!bottomDone && (top >= this.viewport.bottomVisiblePos() || (i === length - 1 && this.isEOF()))) {\r\n          bottomDone = true;\r\n          this['bottomVisible'] = item.item;\r\n          this['bottomVisibleElement'] = item.element;\r\n          this['bottomVisibleScope'] = item.scope;\r\n        }\r\n        topHeight += itemHeight;\r\n      }\r\n      rowTop = itemTop;\r\n\r\n      if (topDone && bottomDone) {\r\n        break;\r\n      }\r\n    }\r\n  }\r\n\r\n}\r\n\r\nexport default Adapter;\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/adapter.js"],"sourceRoot":""}
\ No newline at end of file
diff --git a/dist/ui-scroll.min.js b/dist/ui-scroll.min.js
index 1a25cf9b..7f29ee92 100644
--- a/dist/ui-scroll.min.js
+++ b/dist/ui-scroll.min.js
@@ -1,8 +1,8 @@
 /*!
  * angular-ui-scroll
  * https://github.com/angular-ui/ui-scroll
- * Version: 1.7.2 -- 2018-07-26T04:32:37.367Z
+ * Version: 1.8.0-rc -- 2018-08-13T12:05:10.496Z
  * License: MIT
  */
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diff --git a/dist/ui-scroll.min.js.map b/dist/ui-scroll.min.js.map
index 221dda03..9535f7cc 100644
--- a/dist/ui-scroll.min.js.map
+++ b/dist/ui-scroll.min.js.map
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isDatasourceValid() {\n      return Object.prototype.toString.call(datasource) === '[object Object]' && typeof datasource.get === 'function';\n    };\n\n    datasource = $parse(datasourceName)($scope); // try to get datasource on scope\n    if (!isDatasourceValid()) {\n      datasource = $injector.get(datasourceName); // try to inject datasource as service\n      if (!isDatasourceValid()) {\n        throw new Error(datasourceName + ' is not a valid datasource');\n      }\n    }\n\n    var onRenderHandlers = [];\n    function onRenderHandlersRunner() {\n      onRenderHandlers.forEach(function (handler) {\n        return handler.run();\n      });\n      onRenderHandlers = [];\n    }\n    function persistDatasourceIndex(datasource, propName) {\n      var getter = void 0;\n      // need to postpone min/maxIndexUser processing if the view is empty\n      if (angular.isNumber(datasource[propName])) {\n        getter = datasource[propName];\n        if (angular.isNumber(getter)) {\n          onRenderHandlers = onRenderHandlers.filter(function (handler) {\n            return handler.id !== propName;\n          });\n          onRenderHandlers.push({\n            id: propName,\n            run: function run() {\n              return datasource[propName] = getter;\n            }\n          });\n        }\n      }\n    }\n\n    function defineDatasourceIndex(datasource, propName, propUserName) {\n      var descriptor = Object.getOwnPropertyDescriptor(datasource, propName);\n      if (descriptor && (descriptor.set || descriptor.get)) {\n        return;\n      }\n      var getter = void 0;\n      persistDatasourceIndex(datasource, propName);\n      Object.defineProperty(datasource, propName, {\n        set: function set(value) {\n          getter = value;\n          if (pending.length && !buffer.length) {\n            persistDatasourceIndex(datasource, propName);\n            return;\n          }\n          buffer[propUserName] = value;\n          var topPaddingHeightOld = viewport.topDataPos();\n          viewport.adjustPaddings();\n          if (propName === 'minIndex') {\n            viewport.onAfterMinIndexSet(topPaddingHeightOld);\n          }\n        },\n        get: function get() {\n          return getter;\n        }\n      });\n    }\n\n    defineDatasourceIndex(datasource, 'minIndex', 'minIndexUser');\n    defineDatasourceIndex(datasource, 'maxIndex', 'maxIndexUser');\n\n    var fetchNext = datasource.get.length !== 2 ? function (success) {\n      return datasource.get(buffer.next, bufferSize, success);\n    } : function (success) {\n      datasource.get({\n        index: buffer.next,\n        append: buffer.length ? buffer[buffer.length - 1].item : void 0,\n        count: bufferSize\n      }, success);\n    };\n\n    var fetchPrevious = datasource.get.length !== 2 ? function (success) {\n      return datasource.get(buffer.first - bufferSize, bufferSize, success);\n    } : function (success) {\n      datasource.get({\n        index: buffer.first - bufferSize,\n        prepend: buffer.length ? buffer[0].item : void 0,\n        count: bufferSize\n      }, success);\n    };\n\n    var initialize = function initialize() {\n      var tryCount = 0;\n      if (!viewport.applyContainerStyle()) {\n        var timer = $interval(function () {\n          tryCount++;\n          if (viewport.applyContainerStyle()) {\n            $interval.cancel(timer);\n            doAdjust();\n          }\n          if (tryCount * VIEWPORT_POLLING_INTERVAL >= MAX_VIEWPORT_DELAY) {\n            $interval.cancel(timer);\n            throw Error('ui-scroll directive requires a viewport with non-zero height in ' + MAX_VIEWPORT_DELAY + 'ms');\n          }\n        }, VIEWPORT_POLLING_INTERVAL);\n      } else {\n        doAdjust();\n      }\n    };\n\n    /**\n     * Build padding elements\n     *\n     * Calling linker is the only way I found to get access to the tag name of the template\n     * to prevent the directive scope from pollution a new scope is created and destroyed\n     * right after the builder creation is completed\n     */\n    linker(function (clone, scope) {\n      viewport.createPaddingElements(clone[0]);\n      // we do not include the clone in the DOM. It means that the nested directives will not\n      // be able to reach the parent directives, but in this case it is intentional because we\n      // created the clone to access the template tag name\n      scope.$destroy();\n      clone.remove();\n    });\n\n    $scope.$on('$destroy', function () {\n      unbindEvents();\n      viewport.unbind('mousewheel', wheelHandler);\n    });\n\n    viewport.bind('mousewheel', wheelHandler);\n\n    initialize();\n\n    /* Private function definitions */\n\n    function isInvalid(rid) {\n      return rid && rid !== ridActual || $scope.$$destroyed;\n    }\n\n    function bindEvents() {\n      viewport.bind('resize', resizeAndScrollHandler);\n      viewport.bind('scroll', resizeAndScrollHandler);\n    }\n\n    function unbindEvents() {\n      viewport.unbind('resize', resizeAndScrollHandler);\n      viewport.unbind('scroll', resizeAndScrollHandler);\n    }\n\n    function reload() {\n      viewport.resetTopPadding();\n      viewport.resetBottomPadding();\n      if (arguments.length) {\n        startIndex = arguments[0];\n      }\n      buffer.reset(startIndex);\n      persistDatasourceIndex(datasource, 'minIndex');\n      persistDatasourceIndex(datasource, 'maxIndex');\n      doAdjust();\n    }\n\n    function isElementVisible(wrapper) {\n      return wrapper.element.height() && wrapper.element[0].offsetParent;\n    }\n\n    function visibilityWatcher(wrapper) {\n      if (isElementVisible(wrapper)) {\n        buffer.forEach(function (item) {\n          if (typeof item.unregisterVisibilityWatcher === 'function') {\n            item.unregisterVisibilityWatcher();\n            delete item.unregisterVisibilityWatcher;\n          }\n        });\n        if (!pending.length) {\n          $timeout(function () {\n            return doAdjust();\n          });\n        }\n      }\n    }\n\n    function insertWrapperContent(wrapper, insertAfter) {\n      createElement(wrapper, insertAfter, viewport.insertElement);\n      if (!isElementVisible(wrapper)) {\n        wrapper.unregisterVisibilityWatcher = wrapper.scope.$watch(function () {\n          return visibilityWatcher(wrapper);\n        });\n      }\n      elementRoutines.hideElement(wrapper); // hide inserted elements before data binding\n    }\n\n    function createElement(wrapper, insertAfter, insertElement) {\n      var promises = null;\n      var sibling = insertAfter > 0 ? buffer[insertAfter - 1].element : undefined;\n      linker(function (clone, scope) {\n        promises = insertElement(clone, sibling);\n        wrapper.element = clone;\n        wrapper.scope = scope;\n        scope[itemName] = wrapper.item;\n      });\n      // ui-scroll-grid apply\n      if (adapter.transform) {\n        var tdInitializer = wrapper.scope.uiScrollTdInitializer;\n        if (tdInitializer && tdInitializer.linking) {\n          adapter.transform(wrapper.scope, wrapper.element);\n        } else {\n          wrapper.scope.uiScrollTdInitializer = {\n            onLink: function onLink() {\n              return adapter.transform(wrapper.scope, wrapper.element);\n            },\n            scope: wrapper.scope\n          };\n        }\n      }\n      return promises;\n    }\n\n    function updateDOM() {\n      var promises = [];\n      var toBePrepended = [];\n      var toBeRemoved = [];\n      var inserted = [];\n\n      buffer.forEach(function (wrapper, i) {\n        switch (wrapper.op) {\n          case 'prepend':\n            toBePrepended.unshift(wrapper);\n            break;\n          case 'append':\n            insertWrapperContent(wrapper, i);\n            wrapper.op = 'none';\n            inserted.push(wrapper);\n            break;\n          case 'insert':\n            promises = promises.concat(createElement(wrapper, i, viewport.insertElementAnimated));\n            wrapper.op = 'none';\n            inserted.push(wrapper);\n            break;\n          case 'remove':\n            toBeRemoved.push(wrapper);\n        }\n      });\n\n      toBeRemoved.forEach(function (wrapper) {\n        return promises = promises.concat(viewport.removeItem(wrapper));\n      });\n\n      if (toBePrepended.length) toBePrepended.forEach(function (wrapper) {\n        insertWrapperContent(wrapper);\n        wrapper.op = 'none';\n      });\n\n      buffer.forEach(function (item, i) {\n        return item.scope.$index = buffer.first + i;\n      });\n\n      return {\n        prepended: toBePrepended,\n        removed: toBeRemoved,\n        inserted: inserted,\n        animated: promises\n      };\n    }\n\n    function updatePaddings(rid, updates) {\n      // schedule another doAdjust after animation completion\n      if (updates.animated.length) {\n        $q.all(updates.animated).then(function () {\n          viewport.adjustPaddings();\n          doAdjust(rid);\n        });\n      } else {\n        viewport.adjustPaddings();\n      }\n    }\n\n    function enqueueFetch(rid, updates) {\n      if (viewport.shouldLoadBottom()) {\n        if (!updates || buffer.effectiveHeight(updates.inserted) > 0) {\n          // this means that at least one item appended in the last batch has height > 0\n          if (pending.push(true) === 1) {\n            adapter.loading(true);\n            fetch(rid);\n          }\n        }\n      } else if (viewport.shouldLoadTop()) {\n        if (!updates || buffer.effectiveHeight(updates.prepended) > 0 || pending[0]) {\n          // this means that at least one item appended in the last batch has height > 0\n          // pending[0] = true means that previous fetch was appending. We need to force at least one prepend\n          // BTW there will always be at least 1 element in the pending array because bottom is fetched first\n          if (pending.push(false) === 1) {\n            adapter.loading(true);\n            fetch(rid);\n          }\n        }\n      }\n    }\n\n    function processUpdates() {\n      var updates = updateDOM();\n\n      // We need the item bindings to be processed before we can do adjustments\n      !$scope.$$phase && !$rootScope.$$phase && $scope.$digest();\n\n      updates.inserted.forEach(function (w) {\n        return elementRoutines.showElement(w);\n      });\n      updates.prepended.forEach(function (w) {\n        return elementRoutines.showElement(w);\n      });\n      return updates;\n    }\n\n    function doAdjust(rid) {\n      if (!rid) {\n        // dismiss pending requests\n        pending = [];\n        rid = ++ridActual;\n      }\n\n      var updates = processUpdates();\n\n      if (isInvalid(rid)) {\n        return;\n      }\n\n      updatePaddings(rid, updates);\n      enqueueFetch(rid);\n\n      if (!pending.length) {\n        adapter.calculateProperties();\n      }\n    }\n\n    function doAdjustAfterFetch(rid) {\n      var updates = processUpdates();\n\n      viewport.onAfterPrepend(updates);\n\n      if (isInvalid(rid)) {\n        return;\n      }\n\n      updatePaddings(rid, updates);\n      onRenderHandlersRunner();\n      enqueueFetch(rid, updates);\n      pending.shift();\n\n      if (pending.length) fetch(rid);else {\n        adapter.loading(false);\n        bindEvents();\n        adapter.calculateProperties();\n      }\n    }\n\n    function fetch(rid) {\n      if (pending[0]) {\n        // scrolling down\n        if (buffer.length && !viewport.shouldLoadBottom()) {\n          doAdjustAfterFetch(rid);\n        } else {\n          fetchNext(function (result) {\n            if (isInvalid(rid)) {\n              return;\n            }\n\n            if (result.length < bufferSize) {\n              buffer.eof = true;\n            }\n\n            if (result.length > 0) {\n              viewport.clipTop();\n              buffer.append(result);\n            }\n\n            doAdjustAfterFetch(rid);\n          });\n        }\n      } else {\n        // scrolling up\n        if (buffer.length && !viewport.shouldLoadTop()) {\n          doAdjustAfterFetch(rid);\n        } else {\n          fetchPrevious(function (result) {\n            if (isInvalid(rid)) {\n              return;\n            }\n\n            if (result.length < bufferSize) {\n              buffer.bof = true;\n              // log 'bof is reached'\n            }\n\n            if (result.length > 0) {\n              if (buffer.length) {\n                viewport.clipBottom();\n              }\n              buffer.prepend(result);\n            }\n\n            doAdjustAfterFetch(rid);\n          });\n        }\n      }\n    }\n\n    function resizeAndScrollHandler() {\n      if (!$rootScope.$$phase && !adapter.isLoading && !adapter.disabled) {\n\n        enqueueFetch(ridActual);\n\n        if (pending.length) {\n          unbindEvents();\n        } else {\n          adapter.calculateProperties();\n          !$scope.$$phase && $scope.$digest();\n        }\n      }\n    }\n\n    function wheelHandler(event) {\n      if (!adapter.disabled) {\n        var scrollTop = viewport[0].scrollTop;\n        var yMax = viewport[0].scrollHeight - viewport[0].clientHeight;\n\n        if (scrollTop === 0 && !buffer.bof || scrollTop === yMax && !buffer.eof) {\n          event.preventDefault();\n        }\n      }\n    }\n  }\n}]);\n\n/***/ }),\n/* 1 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i[\"return\"]) _i[\"return\"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError(\"Invalid attempt to destructure non-iterable instance\"); } }; }();\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n/*!\r\n globals: angular, window\r\n List of used element methods available in JQuery but not in JQuery Lite\r\n element.before(elem)\r\n element.height()\r\n element.outerHeight(true)\r\n element.height(value) = only for Top/Bottom padding elements\r\n element.scrollTop()\r\n element.scrollTop(value)\r\n */\n\nvar JQLiteExtras = function () {\n  function JQLiteExtras() {\n    _classCallCheck(this, JQLiteExtras);\n  }\n\n  _createClass(JQLiteExtras, [{\n    key: 'registerFor',\n    value: function registerFor(element) {\n      var convertToPx = void 0,\n          css = void 0,\n          getStyle = void 0,\n          isWindow = void 0;\n      // angular implementation blows up if elem is the window\n      css = angular.element.prototype.css;\n\n      element.prototype.css = function (name, value) {\n        var self = this;\n        var elem = self[0];\n        if (!(!elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style)) {\n          return css.call(self, name, value);\n        }\n      };\n\n      // as defined in angularjs v1.0.5\n      isWindow = function isWindow(obj) {\n        return obj && obj.document && obj.location && obj.alert && obj.setInterval;\n      };\n\n      function scrollTo(self, direction, value) {\n        var elem = self[0];\n\n        var _top$left$direction = _slicedToArray({\n          top: ['scrollTop', 'pageYOffset', 'scrollLeft'],\n          left: ['scrollLeft', 'pageXOffset', 'scrollTop']\n        }[direction], 3),\n            method = _top$left$direction[0],\n            prop = _top$left$direction[1],\n            preserve = _top$left$direction[2];\n\n        var isValueDefined = typeof value !== 'undefined';\n        if (isWindow(elem)) {\n          if (isValueDefined) {\n            return elem.scrollTo(self[preserve].call(self), value);\n          }\n          return prop in elem ? elem[prop] : elem.document.documentElement[method];\n        } else {\n          if (isValueDefined) {\n            elem[method] = value;\n          }\n          return elem[method];\n        }\n      }\n\n      if (window.getComputedStyle) {\n        getStyle = function getStyle(elem) {\n          return window.getComputedStyle(elem, null);\n        };\n        convertToPx = function convertToPx(elem, value) {\n          return parseFloat(value);\n        };\n      } else {\n        getStyle = function getStyle(elem) {\n          return elem.currentStyle;\n        };\n        convertToPx = function convertToPx(elem, value) {\n          var left = void 0,\n              result = void 0,\n              rs = void 0,\n              rsLeft = void 0,\n              style = void 0;\n          var core_pnum = /[+-]?(?:\\d*\\.|)\\d+(?:[eE][+-]?\\d+|)/.source;\n          var rnumnonpx = new RegExp('^(' + core_pnum + ')(?!px)[a-z%]+$', 'i');\n\n          if (!rnumnonpx.test(value)) {\n            return parseFloat(value);\n          }\n\n          // ported from JQuery\n          style = elem.style;\n          left = style.left;\n          rs = elem.runtimeStyle;\n          rsLeft = rs && rs.left;\n          if (rs) {\n            rs.left = style.left;\n          }\n          // put in the new values to get a computed style out\n          style.left = value;\n          result = style.pixelLeft;\n          style.left = left;\n          if (rsLeft) {\n            rs.left = rsLeft;\n          }\n          return result;\n        };\n      }\n\n      function getMeasurements(elem, measure) {\n        var base = void 0,\n            borderA = void 0,\n            borderB = void 0,\n            computedMarginA = void 0,\n            computedMarginB = void 0,\n            computedStyle = void 0,\n            dirA = void 0,\n            dirB = void 0,\n            marginA = void 0,\n            marginB = void 0,\n            paddingA = void 0,\n            paddingB = void 0;\n\n        if (isWindow(elem)) {\n          base = document.documentElement[{ height: 'clientHeight', width: 'clientWidth' }[measure]];\n\n          return {\n            base: base,\n            padding: 0,\n            border: 0,\n            margin: 0\n          };\n        }\n\n        // Start with offset property\n\n        var _width$height$measure = _slicedToArray({\n          width: [elem.offsetWidth, 'Left', 'Right'],\n          height: [elem.offsetHeight, 'Top', 'Bottom']\n        }[measure], 3);\n\n        base = _width$height$measure[0];\n        dirA = _width$height$measure[1];\n        dirB = _width$height$measure[2];\n\n\n        computedStyle = getStyle(elem);\n        paddingA = convertToPx(elem, computedStyle['padding' + dirA]) || 0;\n        paddingB = convertToPx(elem, computedStyle['padding' + dirB]) || 0;\n        borderA = convertToPx(elem, computedStyle['border' + dirA + 'Width']) || 0;\n        borderB = convertToPx(elem, computedStyle['border' + dirB + 'Width']) || 0;\n        computedMarginA = computedStyle['margin' + dirA];\n        computedMarginB = computedStyle['margin' + dirB];\n\n        // I do not care for width for now, so this hack is irrelevant\n        // if ( !supportsPercentMargin )\n        // computedMarginA = hackPercentMargin( elem, computedStyle, computedMarginA )\n        // computedMarginB = hackPercentMargin( elem, computedStyle, computedMarginB )\n        marginA = convertToPx(elem, computedMarginA) || 0;\n        marginB = convertToPx(elem, computedMarginB) || 0;\n\n        return {\n          base: base,\n          padding: paddingA + paddingB,\n          border: borderA + borderB,\n          margin: marginA + marginB\n        };\n      }\n\n      function getWidthHeight(elem, direction, measure) {\n        var computedStyle = void 0,\n            result = void 0;\n\n        var measurements = getMeasurements(elem, direction);\n\n        if (measurements.base > 0) {\n          return {\n            base: measurements.base - measurements.padding - measurements.border,\n            outer: measurements.base,\n            outerfull: measurements.base + measurements.margin\n          }[measure];\n        }\n\n        // Fall back to computed then uncomputed css if necessary\n        computedStyle = getStyle(elem);\n        result = computedStyle[direction];\n\n        if (result < 0 || result === null) {\n          result = elem.style[direction] || 0;\n        }\n\n        // Normalize \"\", auto, and prepare for extra\n        result = parseFloat(result) || 0;\n\n        return {\n          base: result - measurements.padding - measurements.border,\n          outer: result,\n          outerfull: result + measurements.padding + measurements.border + measurements.margin\n        }[measure];\n      }\n\n      // define missing methods\n      return angular.forEach({\n        before: function before(newElem) {\n          var children, elem, i, j, parent, ref, self;\n          self = this;\n          elem = self[0];\n          parent = self.parent();\n          children = parent.contents();\n          if (children[0] === elem) {\n            return parent.prepend(newElem);\n          } else {\n            for (i = j = 1, ref = children.length - 1; 1 <= ref ? j <= ref : j >= ref; i = 1 <= ref ? ++j : --j) {\n              if (children[i] === elem) {\n                angular.element(children[i - 1]).after(newElem);\n                return;\n              }\n            }\n            throw new Error('invalid DOM structure ' + elem.outerHTML);\n          }\n        },\n        height: function height(value) {\n          var self;\n          self = this;\n          if (typeof value !== 'undefined') {\n            if (angular.isNumber(value)) {\n              value = value + 'px';\n            }\n            return css.call(self, 'height', value);\n          } else {\n            return getWidthHeight(this[0], 'height', 'base');\n          }\n        },\n        outerHeight: function outerHeight(option) {\n          return getWidthHeight(this[0], 'height', option ? 'outerfull' : 'outer');\n        },\n        outerWidth: function outerWidth(option) {\n          return getWidthHeight(this[0], 'width', option ? 'outerfull' : 'outer');\n        },\n\n\n        /*\r\n         The offset setter method is not implemented\r\n         */\n        offset: function offset(value) {\n          var docElem = void 0,\n              win = void 0;\n          var self = this;\n          var box = {\n            top: 0,\n            left: 0\n          };\n          var elem = self[0];\n          var doc = elem && elem.ownerDocument;\n\n          if (arguments.length) {\n            if (value === undefined) {\n              return self;\n            }\n            // TODO: implement setter\n            throw new Error('offset setter method is not implemented');\n          }\n\n          if (!doc) {\n            return;\n          }\n\n          docElem = doc.documentElement;\n\n          // TODO: Make sure it's not a disconnected DOM node\n\n          if (elem.getBoundingClientRect != null) {\n            box = elem.getBoundingClientRect();\n          }\n\n          win = doc.defaultView || doc.parentWindow;\n\n          return {\n            top: box.top + (win.pageYOffset || docElem.scrollTop) - (docElem.clientTop || 0),\n            left: box.left + (win.pageXOffset || docElem.scrollLeft) - (docElem.clientLeft || 0)\n          };\n        },\n        scrollTop: function scrollTop(value) {\n          return scrollTo(this, 'top', value);\n        },\n        scrollLeft: function scrollLeft(value) {\n          return scrollTo(this, 'left', value);\n        }\n      }, function (value, key) {\n        if (!element.prototype[key]) {\n          return element.prototype[key] = value;\n        }\n      });\n    }\n  }]);\n\n  return JQLiteExtras;\n}();\n\nexports.default = JQLiteExtras;\n\n/***/ }),\n/* 2 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nvar hideClassToken = 'ng-ui-scroll-hide';\n\nvar ElementRoutines = function () {\n  _createClass(ElementRoutines, null, [{\n    key: 'addCSSRules',\n    value: function addCSSRules() {\n      var selector = '.' + hideClassToken;\n      var rules = 'display: none';\n      var sheet = document.styleSheets[0];\n      var index = void 0;\n      try {\n        index = sheet.cssRules.length;\n      } catch (err) {\n        index = 0;\n      }\n      if ('insertRule' in sheet) {\n        sheet.insertRule(selector + '{' + rules + '}', index);\n      } else if ('addRule' in sheet) {\n        sheet.addRule(selector, rules, index);\n      }\n    }\n  }]);\n\n  function ElementRoutines($injector, $q) {\n    _classCallCheck(this, ElementRoutines);\n\n    this.$animate = $injector.has && $injector.has('$animate') ? $injector.get('$animate') : null;\n    this.isAngularVersionLessThen1_3 = angular.version.major === 1 && angular.version.minor < 3;\n    this.$q = $q;\n  }\n\n  _createClass(ElementRoutines, [{\n    key: 'hideElement',\n    value: function hideElement(wrapper) {\n      wrapper.element.addClass(hideClassToken);\n    }\n  }, {\n    key: 'showElement',\n    value: function showElement(wrapper) {\n      wrapper.element.removeClass(hideClassToken);\n    }\n  }, {\n    key: 'insertElement',\n    value: function insertElement(newElement, previousElement) {\n      previousElement.after(newElement);\n      return [];\n    }\n  }, {\n    key: 'removeElement',\n    value: function removeElement(wrapper) {\n      wrapper.element.remove();\n      wrapper.scope.$destroy();\n      return [];\n    }\n  }, {\n    key: 'insertElementAnimated',\n    value: function insertElementAnimated(newElement, previousElement) {\n      if (!this.$animate) {\n        return this.insertElement(newElement, previousElement);\n      }\n\n      if (this.isAngularVersionLessThen1_3) {\n        var deferred = this.$q.defer();\n        // no need for parent - previous element is never null\n        this.$animate.enter(newElement, null, previousElement, function () {\n          return deferred.resolve();\n        });\n\n        return [deferred.promise];\n      }\n\n      // no need for parent - previous element is never null\n      return [this.$animate.enter(newElement, null, previousElement)];\n    }\n  }, {\n    key: 'removeElementAnimated',\n    value: function removeElementAnimated(wrapper) {\n      if (!this.$animate) {\n        return this.removeElement(wrapper);\n      }\n\n      if (this.isAngularVersionLessThen1_3) {\n        var deferred = this.$q.defer();\n        this.$animate.leave(wrapper.element, function () {\n          wrapper.scope.$destroy();\n          return deferred.resolve();\n        });\n\n        return [deferred.promise];\n      }\n\n      return [this.$animate.leave(wrapper.element).then(function () {\n        return wrapper.scope.$destroy();\n      })];\n    }\n  }]);\n\n  return ElementRoutines;\n}();\n\nexports.default = ElementRoutines;\n\n/***/ }),\n/* 3 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = ScrollBuffer;\nfunction ScrollBuffer(elementRoutines, bufferSize, startIndex) {\n  var buffer = Object.create(Array.prototype);\n\n  angular.extend(buffer, {\n    size: bufferSize,\n\n    reset: function reset(startIndex) {\n      buffer.remove(0, buffer.length);\n      buffer.eof = false;\n      buffer.bof = false;\n      buffer.first = startIndex;\n      buffer.next = startIndex;\n      buffer.minIndex = startIndex;\n      buffer.maxIndex = startIndex;\n      buffer.minIndexUser = null;\n      buffer.maxIndexUser = null;\n    },\n    append: function append(items) {\n      items.forEach(function (item) {\n        ++buffer.next;\n        buffer.insert('append', item);\n      });\n      buffer.maxIndex = buffer.eof ? buffer.next - 1 : Math.max(buffer.next - 1, buffer.maxIndex);\n    },\n    prepend: function prepend(items) {\n      items.reverse().forEach(function (item) {\n        --buffer.first;\n        buffer.insert('prepend', item);\n      });\n      buffer.minIndex = buffer.bof ? buffer.minIndex = buffer.first : Math.min(buffer.first, buffer.minIndex);\n    },\n\n\n    /**\r\n     * inserts wrapped element in the buffer\r\n     * the first argument is either operation keyword (see below) or a number for operation 'insert'\r\n     * for insert the number is the index for the buffer element the new one have to be inserted after\r\n     * operations: 'append', 'prepend', 'insert', 'remove', 'update', 'none'\r\n     */\n    insert: function insert(operation, item, isTop) {\n      var wrapper = {\n        item: item\n      };\n\n      if (operation % 1 === 0) {\n        // it is an insert\n        wrapper.op = 'insert';\n        buffer.splice(operation, 0, wrapper);\n        if (isTop) {\n          buffer.first--;\n        } else {\n          buffer.next++;\n        }\n      } else {\n        wrapper.op = operation;\n        switch (operation) {\n          case 'append':\n            buffer.push(wrapper);\n            break;\n          case 'prepend':\n            buffer.unshift(wrapper);\n            break;\n        }\n      }\n    },\n\n\n    // removes elements from buffer\n    remove: function remove(arg1, arg2) {\n      if (angular.isNumber(arg1)) {\n        // removes items from arg1 (including) through arg2 (excluding)\n        for (var i = arg1; i < arg2; i++) {\n          elementRoutines.removeElement(buffer[i]);\n        }\n        return buffer.splice(arg1, arg2 - arg1);\n      }\n      // removes single item(wrapper) from the buffer\n      buffer.splice(buffer.indexOf(arg1), 1);\n      if (arg1._op === 'isTop' && buffer.first === this.getAbsMinIndex()) {\n        this.incrementMinIndex();\n      } else {\n        this.decrementMaxIndex();\n      }\n      if (arg1._op === 'isTop') {\n        buffer.first++;\n      } else {\n        buffer.next--;\n      }\n      if (!buffer.length) {\n        buffer.first = 1;\n        buffer.next = 1;\n      }\n\n      return elementRoutines.removeElementAnimated(arg1);\n    },\n    incrementMinIndex: function incrementMinIndex() {\n      if (buffer.minIndexUser !== null) {\n        if (buffer.minIndex > buffer.minIndexUser) {\n          buffer.minIndexUser++;\n          return;\n        }\n        if (buffer.minIndex === buffer.minIndexUser) {\n          buffer.minIndexUser++;\n        }\n      }\n      buffer.minIndex++;\n    },\n    decrementMaxIndex: function decrementMaxIndex() {\n      if (buffer.maxIndexUser !== null && buffer.maxIndex <= buffer.maxIndexUser) {\n        buffer.maxIndexUser--;\n      }\n      buffer.maxIndex--;\n    },\n    getAbsMinIndex: function getAbsMinIndex() {\n      if (buffer.minIndexUser !== null) {\n        return Math.min(buffer.minIndexUser, buffer.minIndex);\n      }\n      return buffer.minIndex;\n    },\n    getAbsMaxIndex: function getAbsMaxIndex() {\n      if (buffer.maxIndexUser !== null) {\n        return Math.max(buffer.maxIndexUser, buffer.maxIndex);\n      }\n      return buffer.maxIndex;\n    },\n    effectiveHeight: function effectiveHeight(elements) {\n      if (!elements.length) {\n        return 0;\n      }\n      var top = Number.MAX_VALUE;\n      var bottom = Number.NEGATIVE_INFINITY;\n      elements.forEach(function (wrapper) {\n        if (wrapper.element[0].offsetParent) {\n          // element style is not display:none\n          top = Math.min(top, wrapper.element.offset().top);\n          bottom = Math.max(bottom, wrapper.element.offset().top + wrapper.element.outerHeight(true));\n        }\n      });\n      return Math.max(0, bottom - top);\n    }\n  });\n\n  buffer.reset(startIndex);\n\n  return buffer;\n}\n\n/***/ }),\n/* 4 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = Viewport;\n\nvar _padding = __webpack_require__(5);\n\nvar _padding2 = _interopRequireDefault(_padding);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction Viewport(elementRoutines, buffer, element, viewportController, $rootScope, padding) {\n  var topPadding = null;\n  var bottomPadding = null;\n  var viewport = viewportController && viewportController.viewport ? viewportController.viewport : angular.element(window);\n  var container = viewportController && viewportController.container ? viewportController.container : undefined;\n  var scope = viewportController && viewportController.scope ? viewportController.scope : $rootScope;\n\n  viewport.css({\n    'overflow-anchor': 'none',\n    'overflow-y': 'auto',\n    'display': 'block'\n  });\n\n  function bufferPadding() {\n    return viewport.outerHeight() * padding; // some extra space to initiate preload\n  }\n\n  angular.extend(viewport, {\n    getScope: function getScope() {\n      return scope;\n    },\n    createPaddingElements: function createPaddingElements(template) {\n      topPadding = new _padding2.default(template);\n      bottomPadding = new _padding2.default(template);\n      element.before(topPadding.element);\n      element.after(bottomPadding.element);\n      topPadding.height(0);\n      bottomPadding.height(0);\n    },\n    applyContainerStyle: function applyContainerStyle() {\n      if (!container) {\n        return true;\n      }\n      if (container !== viewport) {\n        viewport.css('height', window.getComputedStyle(container[0]).height);\n      }\n      return viewport.height() > 0;\n    },\n    bottomDataPos: function bottomDataPos() {\n      var scrollHeight = viewport[0].scrollHeight;\n      scrollHeight = scrollHeight != null ? scrollHeight : viewport[0].document.documentElement.scrollHeight;\n      return scrollHeight - bottomPadding.height();\n    },\n    topDataPos: function topDataPos() {\n      return topPadding.height();\n    },\n    bottomVisiblePos: function bottomVisiblePos() {\n      return viewport.scrollTop() + viewport.outerHeight();\n    },\n    topVisiblePos: function topVisiblePos() {\n      return viewport.scrollTop();\n    },\n    insertElement: function insertElement(e, sibling) {\n      return elementRoutines.insertElement(e, sibling || topPadding.element);\n    },\n    insertElementAnimated: function insertElementAnimated(e, sibling) {\n      return elementRoutines.insertElementAnimated(e, sibling || topPadding.element);\n    },\n    shouldLoadBottom: function shouldLoadBottom() {\n      return !buffer.eof && viewport.bottomDataPos() < viewport.bottomVisiblePos() + bufferPadding();\n    },\n    clipBottom: function clipBottom() {\n      // clip the invisible items off the bottom\n      var overage = 0;\n      var overageHeight = 0;\n      var itemHeight = 0;\n      var emptySpaceHeight = viewport.bottomDataPos() - viewport.bottomVisiblePos() - bufferPadding();\n\n      for (var i = buffer.length - 1; i >= 0; i--) {\n        itemHeight = buffer[i].element.outerHeight(true);\n        if (overageHeight + itemHeight > emptySpaceHeight) {\n          break;\n        }\n        bottomPadding.cache.add(buffer[i]);\n        overageHeight += itemHeight;\n        overage++;\n      }\n\n      if (overage > 0) {\n        buffer.eof = false;\n        buffer.remove(buffer.length - overage, buffer.length);\n        buffer.next -= overage;\n        viewport.adjustPaddings();\n      }\n    },\n    shouldLoadTop: function shouldLoadTop() {\n      return !buffer.bof && viewport.topDataPos() > viewport.topVisiblePos() - bufferPadding();\n    },\n    clipTop: function clipTop() {\n      // clip the invisible items off the top\n      var overage = 0;\n      var overageHeight = 0;\n      var itemHeight = 0;\n      var emptySpaceHeight = viewport.topVisiblePos() - viewport.topDataPos() - bufferPadding();\n\n      for (var i = 0; i < buffer.length; i++) {\n        itemHeight = buffer[i].element.outerHeight(true);\n        if (overageHeight + itemHeight > emptySpaceHeight) {\n          break;\n        }\n        topPadding.cache.add(buffer[i]);\n        overageHeight += itemHeight;\n        overage++;\n      }\n\n      if (overage > 0) {\n        // we need to adjust top padding element before items are removed from top\n        // to avoid strange behaviour of scroll bar during remove top items when we are at the very bottom\n        topPadding.height(topPadding.height() + overageHeight);\n        buffer.bof = false;\n        buffer.remove(0, overage);\n        buffer.first += overage;\n      }\n    },\n    adjustPaddings: function adjustPaddings() {\n      if (!buffer.length) {\n        return;\n      }\n\n      // precise heights calculation based on items that are in buffer or that were in buffer once\n      var visibleItemsHeight = buffer.reduce(function (summ, item) {\n        return summ + item.element.outerHeight(true);\n      }, 0);\n\n      var topPaddingHeight = 0,\n          topCount = 0;\n      topPadding.cache.forEach(function (item) {\n        if (item.index < buffer.first) {\n          topPaddingHeight += item.height;\n          topCount++;\n        }\n      });\n\n      var bottomPaddingHeight = 0,\n          bottomCount = 0;\n      bottomPadding.cache.forEach(function (item) {\n        if (item.index >= buffer.next) {\n          bottomPaddingHeight += item.height;\n          bottomCount++;\n        }\n      });\n\n      var totalHeight = visibleItemsHeight + topPaddingHeight + bottomPaddingHeight;\n      var averageItemHeight = totalHeight / (topCount + bottomCount + buffer.length);\n\n      // average heights calculation, items that have never been reached\n      var adjustTopPadding = buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser;\n      var adjustBottomPadding = buffer.maxIndexUser !== null && buffer.maxIndex < buffer.maxIndexUser;\n      var topPaddingHeightAdd = adjustTopPadding ? (buffer.minIndex - buffer.minIndexUser) * averageItemHeight : 0;\n      var bottomPaddingHeightAdd = adjustBottomPadding ? (buffer.maxIndexUser - buffer.maxIndex) * averageItemHeight : 0;\n\n      // paddings combine adjustment\n      topPadding.height(topPaddingHeight + topPaddingHeightAdd);\n      bottomPadding.height(bottomPaddingHeight + bottomPaddingHeightAdd);\n    },\n    onAfterMinIndexSet: function onAfterMinIndexSet(topPaddingHeightOld) {\n      // additional scrollTop adjustment in case of datasource.minIndex external set\n      if (buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser) {\n        var diff = topPadding.height() - topPaddingHeightOld;\n        viewport.scrollTop(viewport.scrollTop() + diff);\n        while ((diff -= viewport.scrollTop()) > 0) {\n          bottomPadding.height(bottomPadding.height() + diff);\n          viewport.scrollTop(viewport.scrollTop() + diff);\n        }\n      }\n    },\n    onAfterPrepend: function onAfterPrepend(updates) {\n      if (!updates.prepended.length) return;\n      var height = buffer.effectiveHeight(updates.prepended);\n      var paddingHeight = topPadding.height() - height;\n      if (paddingHeight >= 0) {\n        topPadding.height(paddingHeight);\n      } else {\n        topPadding.height(0);\n        viewport.scrollTop(viewport.scrollTop() - paddingHeight);\n      }\n    },\n    resetTopPadding: function resetTopPadding() {\n      topPadding.height(0);\n      topPadding.cache.clear();\n    },\n    resetBottomPadding: function resetBottomPadding() {\n      bottomPadding.height(0);\n      bottomPadding.cache.clear();\n    },\n    removeCacheItem: function removeCacheItem(item, isTop) {\n      topPadding.cache.remove(item, isTop);\n      bottomPadding.cache.remove(item, isTop);\n    },\n    removeItem: function removeItem(item) {\n      this.removeCacheItem(item);\n      return buffer.remove(item);\n    }\n  });\n\n  return viewport;\n}\n\n/***/ }),\n/* 5 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n// Can't just extend the Array, due to Babel does not support built-in classes extending\n// This solution was taken from https://stackoverflow.com/questions/46897414/es6-class-extends-array-workaround-for-es5-babel-transpile\nvar CacheProto = function () {\n  function CacheProto() {\n    _classCallCheck(this, CacheProto);\n  }\n\n  _createClass(CacheProto, [{\n    key: 'add',\n    value: function add(item) {\n      for (var i = this.length - 1; i >= 0; i--) {\n        if (this[i].index === item.scope.$index) {\n          this[i].height = item.element.outerHeight();\n          return;\n        }\n      }\n      this.push({\n        index: item.scope.$index,\n        height: item.element.outerHeight()\n      });\n      this.sort(function (a, b) {\n        return a.index < b.index ? -1 : a.index > b.index ? 1 : 0;\n      });\n    }\n  }, {\n    key: 'remove',\n    value: function remove(argument, _isTop) {\n      var index = argument % 1 === 0 ? argument : argument.scope.$index;\n      var isTop = argument % 1 === 0 ? _isTop : argument._op === 'isTop';\n      for (var i = this.length - 1; i >= 0; i--) {\n        if (this[i].index === index) {\n          this.splice(i, 1);\n          break;\n        }\n      }\n      if (!isTop) {\n        for (var _i = this.length - 1; _i >= 0; _i--) {\n          if (this[_i].index > index) {\n            this[_i].index--;\n          }\n        }\n      }\n    }\n  }, {\n    key: 'clear',\n    value: function clear() {\n      this.length = 0;\n    }\n  }]);\n\n  return CacheProto;\n}();\n\nfunction Cache() {\n  var instance = [];\n  instance.push.apply(instance, arguments);\n  Object.setPrototypeOf(instance, Cache.prototype);\n  return instance;\n}\nCache.prototype = Object.create(Array.prototype);\nObject.getOwnPropertyNames(CacheProto.prototype).forEach(function (methodName) {\n  return Cache.prototype[methodName] = CacheProto.prototype[methodName];\n});\n\nfunction generateElement(template) {\n  if (template.nodeType !== Node.ELEMENT_NODE) {\n    throw new Error('ui-scroll directive requires an Element node for templating the view');\n  }\n  var element = void 0;\n  switch (template.tagName.toLowerCase()) {\n    case 'dl':\n      throw new Error('ui-scroll directive does not support <' + template.tagName + '> as a repeating tag: ' + template.outerHTML);\n    case 'tr':\n      var table = angular.element('<table><tr><td><div></div></td></tr></table>');\n      element = table.find('tr');\n      break;\n    case 'li':\n      element = angular.element('<li></li>');\n      break;\n    default:\n      element = angular.element('<div></div>');\n  }\n  return element;\n}\n\nvar Padding = function () {\n  function Padding(template) {\n    _classCallCheck(this, Padding);\n\n    this.element = generateElement(template);\n    this.cache = new Cache();\n  }\n\n  _createClass(Padding, [{\n    key: 'height',\n    value: function height() {\n      return this.element.height.apply(this.element, arguments);\n    }\n  }]);\n\n  return Padding;\n}();\n\nexports.default = Padding;\n\n/***/ }),\n/* 6 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nvar Adapter = function () {\n  function Adapter($scope, $parse, $attr, viewport, buffer, doAdjust, reload) {\n    _classCallCheck(this, Adapter);\n\n    this.$parse = $parse;\n    this.$attr = $attr;\n    this.viewport = viewport;\n    this.buffer = buffer;\n\n    this.doAdjust = doAdjust;\n    this.reload = reload;\n\n    this.isLoading = false;\n    this.disabled = false;\n\n    var viewportScope = viewport.getScope();\n    this.startScope = viewportScope.$parent ? viewportScope : $scope;\n\n    this.publicContext = {};\n    this.assignAdapter($attr.adapter);\n    this.generatePublicContext();\n  }\n\n  _createClass(Adapter, [{\n    key: 'assignAdapter',\n    value: function assignAdapter(adapterAttr) {\n      if (!adapterAttr || !(adapterAttr = adapterAttr.replace(/^\\s+|\\s+$/gm, ''))) {\n        return;\n      }\n      var adapterOnScope = void 0;\n\n      try {\n        this.$parse(adapterAttr).assign(this.startScope, {});\n        adapterOnScope = this.$parse(adapterAttr)(this.startScope);\n      } catch (error) {\n        error.message = 'Angular ui-scroll Adapter assignment exception.\\n' + ('Can\\'t parse \"' + adapterAttr + '\" expression.\\n') + error.message;\n        throw error;\n      }\n\n      angular.extend(adapterOnScope, this.publicContext);\n      this.publicContext = adapterOnScope;\n    }\n  }, {\n    key: 'generatePublicContext',\n    value: function generatePublicContext() {\n      var _this = this;\n\n      // these methods will be accessible out of ui-scroll via user defined adapter\n      var publicMethods = ['reload', 'applyUpdates', 'append', 'prepend', 'isBOF', 'isEOF', 'isEmpty'];\n      for (var i = publicMethods.length - 1; i >= 0; i--) {\n        this.publicContext[publicMethods[i]] = this[publicMethods[i]].bind(this);\n      }\n\n      // these read-only props will be accessible out of ui-scroll via user defined adapter\n      var publicProps = ['isLoading', 'topVisible', 'topVisibleElement', 'topVisibleScope', 'bottomVisible', 'bottomVisibleElement', 'bottomVisibleScope'];\n\n      var _loop = function _loop(_i) {\n        var property = void 0,\n            attr = _this.$attr[publicProps[_i]];\n        Object.defineProperty(_this, publicProps[_i], {\n          get: function get() {\n            return property;\n          },\n          set: function set(value) {\n            property = value;\n            _this.publicContext[publicProps[_i]] = value;\n            if (attr) {\n              _this.$parse(attr).assign(_this.startScope, value);\n            }\n          }\n        });\n      };\n\n      for (var _i = publicProps.length - 1; _i >= 0; _i--) {\n        _loop(_i);\n      }\n\n      // non-read-only public property\n      Object.defineProperty(this.publicContext, 'disabled', {\n        get: function get() {\n          return _this.disabled;\n        },\n        set: function set(value) {\n          return !(_this.disabled = value) ? _this.doAdjust() : null;\n        }\n      });\n    }\n  }, {\n    key: 'loading',\n    value: function loading(value) {\n      this.isLoading = value;\n    }\n  }, {\n    key: 'isBOF',\n    value: function isBOF() {\n      return this.buffer.bof;\n    }\n  }, {\n    key: 'isEOF',\n    value: function isEOF() {\n      return this.buffer.eof;\n    }\n  }, {\n    key: 'isEmpty',\n    value: function isEmpty() {\n      return !this.buffer.length;\n    }\n  }, {\n    key: 'append',\n    value: function append(newItems) {\n      this.buffer.append(newItems);\n      this.doAdjust();\n      this.viewport.clipTop();\n      this.viewport.clipBottom();\n    }\n  }, {\n    key: 'prepend',\n    value: function prepend(newItems) {\n      this.buffer.prepend(newItems);\n      this.doAdjust();\n      this.viewport.clipTop();\n      this.viewport.clipBottom();\n    }\n  }, {\n    key: 'applyUpdates',\n    value: function applyUpdates(arg1, arg2) {\n      if (typeof arg1 === 'function') {\n        this.applyUpdatesFunc(arg1);\n      } else {\n        this.applyUpdatesIndex(arg1, arg2);\n      }\n      this.doAdjust();\n    }\n  }, {\n    key: 'applyUpdatesFunc',\n    value: function applyUpdatesFunc(cb) {\n      var _this2 = this;\n\n      this.buffer.slice(0).forEach(function (wrapper) {\n        // we need to do it on the buffer clone, because buffer content\n        // may change as we iterate through\n        _this2.applyUpdate(wrapper, cb(wrapper.item, wrapper.scope, wrapper.element));\n      });\n    }\n  }, {\n    key: 'applyUpdatesIndex',\n    value: function applyUpdatesIndex(index, newItems) {\n      if (index % 1 !== 0) {\n        throw new Error('applyUpdates - ' + index + ' is not a valid index (should be an integer)');\n      }\n      var _index = index - this.buffer.first;\n\n      // apply updates only within buffer\n      if (_index >= 0 && _index < this.buffer.length) {\n        this.applyUpdate(this.buffer[_index], newItems);\n      }\n      // out-of-buffer case: deletion may affect Paddings\n      else if (index >= this.buffer.getAbsMinIndex() && index <= this.buffer.getAbsMaxIndex()) {\n          if (angular.isArray(newItems) && !newItems.length) {\n            this.viewport.removeCacheItem(index, index === this.buffer.minIndex);\n            if (index === this.buffer.getAbsMinIndex()) {\n              this.buffer.incrementMinIndex();\n            } else {\n              this.buffer.decrementMaxIndex();\n            }\n          }\n        }\n    }\n  }, {\n    key: 'applyUpdate',\n    value: function applyUpdate(wrapper, newItems) {\n      var _this3 = this;\n\n      if (!angular.isArray(newItems)) {\n        return;\n      }\n      var position = this.buffer.indexOf(wrapper);\n      if (!newItems.reverse().some(function (newItem) {\n        return newItem === wrapper.item;\n      })) {\n        wrapper.op = 'remove';\n        if (position === 0 && !newItems.length) {\n          wrapper._op = 'isTop'; // to catch \"first\" edge case on remove\n        }\n      }\n      newItems.forEach(function (newItem) {\n        if (newItem === wrapper.item) {\n          position--;\n        } else {\n          // 3 parameter (isTop) is to catch \"first\" edge case on insert\n          _this3.buffer.insert(position + 1, newItem, position === -1);\n        }\n      });\n    }\n  }, {\n    key: 'calculateProperties',\n    value: function calculateProperties() {\n      var rowTop = null,\n          topHeight = 0;\n      var topDone = false,\n          bottomDone = false;\n      var length = this.buffer.length;\n\n      for (var i = 0; i < length; i++) {\n        var item = this.buffer[i];\n        var itemTop = item.element.offset().top;\n\n        if (rowTop !== itemTop) {\n          // a new row condition\n          var itemHeight = item.element.outerHeight(true);\n          var top = this.viewport.topDataPos() + topHeight + itemHeight;\n\n          if (!topDone && top > this.viewport.topVisiblePos()) {\n            topDone = true;\n            this['topVisible'] = item.item;\n            this['topVisibleElement'] = item.element;\n            this['topVisibleScope'] = item.scope;\n          }\n          if (!bottomDone && (top >= this.viewport.bottomVisiblePos() || i === length - 1 && this.isEOF())) {\n            bottomDone = true;\n            this['bottomVisible'] = item.item;\n            this['bottomVisibleElement'] = item.element;\n            this['bottomVisibleScope'] = item.scope;\n          }\n          topHeight += itemHeight;\n        }\n        rowTop = itemTop;\n\n        if (topDone && bottomDone) {\n          break;\n        }\n      }\n    }\n  }]);\n\n  return Adapter;\n}();\n\nexports.default = Adapter;\n\n/***/ })\n/******/ ]);\n\n\n// WEBPACK FOOTER //\n// ui-scroll.min.js"," \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, {\n \t\t\t\tconfigurable: false,\n \t\t\t\tenumerable: true,\n \t\t\t\tget: getter\n \t\t\t});\n \t\t}\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 0);\n\n\n\n// WEBPACK FOOTER //\n// webpack/bootstrap 8c9f7d12571bf2ad3771","import JQLiteExtras from './modules/jqLiteExtras';\nimport ElementRoutines from './modules/elementRoutines.js';\nimport ScrollBuffer from './modules/buffer.js';\nimport Viewport from './modules/viewport.js';\nimport Adapter from './modules/adapter.js';\n\nangular.module('ui.scroll', [])\n\n  .constant('JQLiteExtras', JQLiteExtras)\n  .run(['JQLiteExtras', (JQLiteExtras) => {\n    !window.jQuery ? (new JQLiteExtras()).registerFor(angular.element) : null;\n    ElementRoutines.addCSSRules();\n  }])\n\n  .directive('uiScrollViewport', function () {\n    return {\n      restrict: 'A',\n      controller: [\n        '$scope',\n        '$element',\n        function (scope, element) {\n          this.container = element;\n          this.viewport = element;\n          this.scope = scope;\n\n          angular.forEach(element.children(), child => {\n            if (child.tagName.toLowerCase() === 'tbody') {\n              this.viewport = angular.element(child);\n            }\n          });\n\n          return this;\n        }\n      ]\n    };\n  })\n\n  .directive('uiScroll', [\n    '$log',\n    '$injector',\n    '$rootScope',\n    '$timeout',\n    '$interval',\n    '$q',\n    '$parse',\n    function (console, $injector, $rootScope, $timeout, $interval, $q, $parse) {\n\n      return {\n        require: ['?^uiScrollViewport'],\n        restrict: 'A',\n        transclude: 'element',\n        priority: 1000,\n        terminal: true,\n        link: link\n      };\n\n      function link($scope, element, $attr, controllers, linker) {\n        const match = $attr.uiScroll.match(/^\\s*(\\w+)\\s+in\\s+([(\\w|\\$)\\.]+)\\s*$/);\n        if (!match) {\n          throw new Error('Expected uiScroll in form of \\'_item_ in _datasource_\\' but got \\'' + $attr.uiScroll + '\\'');\n        }\n\n        function parseNumericAttr(value, defaultValue) {\n          const result = $parse(value)($scope);\n          return isNaN(result) ? defaultValue : result;\n        }\n\n        const BUFFER_MIN = 3;\n        const BUFFER_DEFAULT = 10;\n        const PADDING_MIN = 0.3;\n        const PADDING_DEFAULT = 0.5;\n        const MAX_VIEWPORT_DELAY = 500;\n        const VIEWPORT_POLLING_INTERVAL = 50;\n\n        let datasource = null;\n        const itemName = match[1];\n        const datasourceName = match[2];\n        const viewportController = controllers[0];\n        const bufferSize = Math.max(BUFFER_MIN, parseNumericAttr($attr.bufferSize, BUFFER_DEFAULT));\n        const padding = Math.max(PADDING_MIN, parseNumericAttr($attr.padding, PADDING_DEFAULT));\n        let startIndex = parseNumericAttr($attr.startIndex, 1);\n        let ridActual = 0; // current data revision id\n        let pending = [];\n\n        const elementRoutines = new ElementRoutines($injector, $q);\n        const buffer = new ScrollBuffer(elementRoutines, bufferSize, startIndex);\n        const viewport = new Viewport(elementRoutines, buffer, element, viewportController, $rootScope, padding);\n        const adapter = new Adapter($scope, $parse, $attr, viewport, buffer, doAdjust, reload);\n\n        if (viewportController) {\n          viewportController.adapter = adapter;\n        }\n\n        const isDatasourceValid = () =>\n          Object.prototype.toString.call(datasource) === '[object Object]' && typeof datasource.get === 'function';\n\n        datasource = $parse(datasourceName)($scope); // try to get datasource on scope\n        if (!isDatasourceValid()) {\n          datasource = $injector.get(datasourceName); // try to inject datasource as service\n          if (!isDatasourceValid()) {\n            throw new Error(datasourceName + ' is not a valid datasource');\n          }\n        }\n\n        let onRenderHandlers = [];\n        function onRenderHandlersRunner() {\n          onRenderHandlers.forEach(handler => handler.run());\n          onRenderHandlers = [];\n        }\n        function persistDatasourceIndex(datasource, propName) {\n          let getter;\n          // need to postpone min/maxIndexUser processing if the view is empty\n          if(angular.isNumber(datasource[propName])) {\n            getter = datasource[propName];\n            if(angular.isNumber(getter)) {\n              onRenderHandlers = onRenderHandlers.filter(handler => handler.id !== propName);\n              onRenderHandlers.push({\n                id: propName,\n                run: () => datasource[propName] = getter\n              });\n            }\n          }\n        }\n\n        function defineDatasourceIndex(datasource, propName, propUserName) {\n          const descriptor = Object.getOwnPropertyDescriptor(datasource, propName);\n          if (descriptor && (descriptor.set || descriptor.get)) {\n            return;\n          }\n          let getter;\n          persistDatasourceIndex(datasource, propName);\n          Object.defineProperty(datasource, propName, {\n            set: (value) => {\n              getter = value;\n              if(pending.length && !buffer.length) {\n                persistDatasourceIndex(datasource, propName);\n                return;\n              }\n              buffer[propUserName] = value;\n              const topPaddingHeightOld = viewport.topDataPos();\n              viewport.adjustPaddings();\n              if (propName === 'minIndex') {\n                viewport.onAfterMinIndexSet(topPaddingHeightOld);\n              }\n            },\n            get: () => getter\n          });\n        }\n\n        defineDatasourceIndex(datasource, 'minIndex', 'minIndexUser');\n        defineDatasourceIndex(datasource, 'maxIndex', 'maxIndexUser');\n\n        const fetchNext = (datasource.get.length !== 2) ?\n          (success) => datasource.get(buffer.next, bufferSize, success) :\n          (success) => {\n            datasource.get({\n              index: buffer.next,\n              append: buffer.length ? buffer[buffer.length - 1].item : void 0,\n              count: bufferSize\n            }, success);\n          };\n\n        const fetchPrevious = (datasource.get.length !== 2) ?\n          (success) => datasource.get(buffer.first - bufferSize, bufferSize, success) :\n          (success) => {\n            datasource.get({\n              index: buffer.first - bufferSize,\n              prepend: buffer.length ? buffer[0].item : void 0,\n              count: bufferSize\n            }, success);\n          };\n\n        const initialize = () => {\n          let tryCount = 0;\n          if(!viewport.applyContainerStyle()) {\n            const timer = $interval(() => {\n              tryCount++;\n              if(viewport.applyContainerStyle()) {\n                $interval.cancel(timer);\n                doAdjust();\n              }\n              if(tryCount * VIEWPORT_POLLING_INTERVAL >= MAX_VIEWPORT_DELAY) {\n                $interval.cancel(timer);\n                throw Error(`ui-scroll directive requires a viewport with non-zero height in ${MAX_VIEWPORT_DELAY}ms`);\n              }\n            }, VIEWPORT_POLLING_INTERVAL);\n          }\n          else {\n            doAdjust();\n          }\n        };\n\n        /**\n         * Build padding elements\n         *\n         * Calling linker is the only way I found to get access to the tag name of the template\n         * to prevent the directive scope from pollution a new scope is created and destroyed\n         * right after the builder creation is completed\n         */\n        linker((clone, scope) => {\n          viewport.createPaddingElements(clone[0]);\n          // we do not include the clone in the DOM. It means that the nested directives will not\n          // be able to reach the parent directives, but in this case it is intentional because we\n          // created the clone to access the template tag name\n          scope.$destroy();\n          clone.remove();\n        });\n\n        $scope.$on('$destroy', () => {\n          unbindEvents();\n          viewport.unbind('mousewheel', wheelHandler);\n        });\n\n        viewport.bind('mousewheel', wheelHandler);\n\n        initialize();\n\n        /* Private function definitions */\n\n        function isInvalid(rid) {\n          return (rid && rid !== ridActual) || $scope.$$destroyed;\n        }\n\n        function bindEvents() {\n          viewport.bind('resize', resizeAndScrollHandler);\n          viewport.bind('scroll', resizeAndScrollHandler);\n        }\n\n        function unbindEvents() {\n          viewport.unbind('resize', resizeAndScrollHandler);\n          viewport.unbind('scroll', resizeAndScrollHandler);\n        }\n\n        function reload() {\n          viewport.resetTopPadding();\n          viewport.resetBottomPadding();\n          if (arguments.length) {\n            startIndex = arguments[0];\n          }\n          buffer.reset(startIndex);\n          persistDatasourceIndex(datasource, 'minIndex');\n          persistDatasourceIndex(datasource, 'maxIndex');\n          doAdjust();\n        }\n\n        function isElementVisible(wrapper) {\n          return wrapper.element.height() && wrapper.element[0].offsetParent;\n        }\n\n        function visibilityWatcher(wrapper) {\n          if (isElementVisible(wrapper)) {\n            buffer.forEach((item) => {\n              if (typeof item.unregisterVisibilityWatcher === 'function') {\n                item.unregisterVisibilityWatcher();\n                delete item.unregisterVisibilityWatcher;\n              }\n            });\n            if (!pending.length) {\n              $timeout(() => doAdjust());\n            }\n          }\n        }\n\n        function insertWrapperContent(wrapper, insertAfter) {\n          createElement(wrapper, insertAfter, viewport.insertElement);\n          if (!isElementVisible(wrapper)) {\n            wrapper.unregisterVisibilityWatcher = wrapper.scope.$watch(() => visibilityWatcher(wrapper));\n          }\n          elementRoutines.hideElement(wrapper); // hide inserted elements before data binding\n        }\n\n        function createElement(wrapper, insertAfter, insertElement) {\n          let promises = null;\n          const sibling = (insertAfter > 0) ? buffer[insertAfter - 1].element : undefined;\n          linker((clone, scope) => {\n            promises = insertElement(clone, sibling);\n            wrapper.element = clone;\n            wrapper.scope = scope;\n            scope[itemName] = wrapper.item;\n          });\n          // ui-scroll-grid apply\n          if (adapter.transform) {\n            const tdInitializer = wrapper.scope.uiScrollTdInitializer;\n            if (tdInitializer && tdInitializer.linking) {\n              adapter.transform(wrapper.scope, wrapper.element);\n            } else {\n              wrapper.scope.uiScrollTdInitializer = {\n                onLink: () => adapter.transform(wrapper.scope, wrapper.element),\n                scope: wrapper.scope\n              };\n            }\n          }\n          return promises;\n        }\n\n        function updateDOM() {\n          let promises = [];\n          const toBePrepended = [];\n          const toBeRemoved = [];\n          const inserted = [];\n\n          buffer.forEach((wrapper, i) => {\n            switch (wrapper.op) {\n              case 'prepend':\n                toBePrepended.unshift(wrapper);\n                break;\n              case 'append':\n                insertWrapperContent(wrapper, i);\n                wrapper.op = 'none';\n                inserted.push(wrapper);\n                break;\n              case 'insert':\n                promises = promises.concat(createElement(wrapper, i, viewport.insertElementAnimated));\n                wrapper.op = 'none';\n                inserted.push(wrapper);\n                break;\n              case 'remove':\n                toBeRemoved.push(wrapper);\n            }\n          });\n\n          toBeRemoved.forEach((wrapper) => promises = promises.concat(viewport.removeItem(wrapper)));\n\n          if (toBePrepended.length)\n            toBePrepended.forEach((wrapper) => {\n              insertWrapperContent(wrapper);\n              wrapper.op = 'none';\n            });\n\n          buffer.forEach((item, i) => item.scope.$index = buffer.first + i);\n\n          return {\n            prepended: toBePrepended,\n            removed: toBeRemoved,\n            inserted: inserted,\n            animated: promises\n          };\n\n        }\n\n        function updatePaddings(rid, updates) {\n          // schedule another doAdjust after animation completion\n          if (updates.animated.length) {\n            $q.all(updates.animated).then(() => {\n              viewport.adjustPaddings();\n              doAdjust(rid);\n            });\n          } else {\n            viewport.adjustPaddings();\n          }\n        }\n\n        function enqueueFetch(rid, updates) {\n          if (viewport.shouldLoadBottom()) {\n            if (!updates || buffer.effectiveHeight(updates.inserted) > 0) {\n              // this means that at least one item appended in the last batch has height > 0\n              if (pending.push(true) === 1) {\n                adapter.loading(true);\n                fetch(rid);\n              }\n            }\n          } else if (viewport.shouldLoadTop()) {\n            if ((!updates || buffer.effectiveHeight(updates.prepended) > 0) || pending[0]) {\n              // this means that at least one item appended in the last batch has height > 0\n              // pending[0] = true means that previous fetch was appending. We need to force at least one prepend\n              // BTW there will always be at least 1 element in the pending array because bottom is fetched first\n              if (pending.push(false) === 1) {\n                adapter.loading(true);\n                fetch(rid);\n              }\n            }\n          }\n        }\n\n        function processUpdates() {\n          const updates = updateDOM();\n\n          // We need the item bindings to be processed before we can do adjustments\n          !$scope.$$phase && !$rootScope.$$phase && $scope.$digest();\n\n          updates.inserted.forEach(w => elementRoutines.showElement(w));\n          updates.prepended.forEach(w => elementRoutines.showElement(w));\n          return updates;\n        }\n\n        function doAdjust(rid) {\n          if (!rid) { // dismiss pending requests\n            pending = [];\n            rid = ++ridActual;\n          }\n\n          const updates = processUpdates();\n\n          if (isInvalid(rid)) {\n            return;\n          }\n\n          updatePaddings(rid, updates);\n          enqueueFetch(rid);\n\n          if (!pending.length) {\n            adapter.calculateProperties();\n          }\n        }\n\n        function doAdjustAfterFetch(rid) {\n          const updates = processUpdates();\n\n          viewport.onAfterPrepend(updates);\n\n          if (isInvalid(rid)) {\n            return;\n          }\n\n          updatePaddings(rid, updates);\n          onRenderHandlersRunner();\n          enqueueFetch(rid, updates);\n          pending.shift();\n\n          if (pending.length)\n            fetch(rid);\n          else {\n            adapter.loading(false);\n            bindEvents();\n            adapter.calculateProperties();\n          }\n        }\n\n        function fetch(rid) {\n          if (pending[0]) {// scrolling down\n            if (buffer.length && !viewport.shouldLoadBottom()) {\n              doAdjustAfterFetch(rid);\n            } else {\n              fetchNext((result) => {\n                if (isInvalid(rid)) {\n                  return;\n                }\n\n                if (result.length < bufferSize) {\n                  buffer.eof = true;\n                }\n\n                if (result.length > 0) {\n                  viewport.clipTop();\n                  buffer.append(result);\n                }\n\n                doAdjustAfterFetch(rid);\n              });\n            }\n          } else {  // scrolling up\n            if (buffer.length && !viewport.shouldLoadTop()) {\n              doAdjustAfterFetch(rid);\n            } else {\n              fetchPrevious((result) => {\n                if (isInvalid(rid)) {\n                  return;\n                }\n\n                if (result.length < bufferSize) {\n                  buffer.bof = true;\n                  // log 'bof is reached'\n                }\n\n                if (result.length > 0) {\n                  if (buffer.length) {\n                    viewport.clipBottom();\n                  }\n                  buffer.prepend(result);\n                }\n\n                doAdjustAfterFetch(rid);\n              });\n            }\n          }\n        }\n\n        function resizeAndScrollHandler() {\n          if (!$rootScope.$$phase && !adapter.isLoading && !adapter.disabled) {\n\n            enqueueFetch(ridActual);\n\n            if (pending.length) {\n              unbindEvents();\n            } else {\n              adapter.calculateProperties();\n              !$scope.$$phase && $scope.$digest();\n            }\n          }\n        }\n\n        function wheelHandler(event) {\n          if (!adapter.disabled) {\n            const scrollTop = viewport[0].scrollTop;\n            const yMax = viewport[0].scrollHeight - viewport[0].clientHeight;\n\n            if ((scrollTop === 0 && !buffer.bof) || (scrollTop === yMax && !buffer.eof)) {\n              event.preventDefault();\n            }\n          }\n        }\n      }\n\n    }\n  ]);\n\n\n\n// WEBPACK FOOTER //\n// ./src/ui-scroll.js","/*!\r\n globals: angular, window\r\n List of used element methods available in JQuery but not in JQuery Lite\r\n element.before(elem)\r\n element.height()\r\n element.outerHeight(true)\r\n element.height(value) = only for Top/Bottom padding elements\r\n element.scrollTop()\r\n element.scrollTop(value)\r\n */\r\n\r\nexport default class JQLiteExtras {\r\n\r\n  registerFor(element) {\r\n    let convertToPx, css, getStyle, isWindow;\r\n    // angular implementation blows up if elem is the window\r\n    css = angular.element.prototype.css;\r\n\r\n    element.prototype.css = function (name, value) {\r\n      let self = this;\r\n      let elem = self[0];\r\n      if (!(!elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style)) {\r\n        return css.call(self, name, value);\r\n      }\r\n    };\r\n\r\n    // as defined in angularjs v1.0.5\r\n    isWindow = (obj) => obj && obj.document && obj.location && obj.alert && obj.setInterval;\r\n\r\n    function scrollTo(self, direction, value) {\r\n      let elem = self[0];\r\n      let [method, prop, preserve] = {\r\n        top: [\r\n          'scrollTop',\r\n          'pageYOffset',\r\n          'scrollLeft'\r\n        ],\r\n        left: [\r\n          'scrollLeft',\r\n          'pageXOffset',\r\n          'scrollTop'\r\n        ]\r\n      }[direction];\r\n\r\n      const isValueDefined = typeof value !== 'undefined';\r\n      if (isWindow(elem)) {\r\n        if (isValueDefined) {\r\n          return elem.scrollTo(self[preserve].call(self), value);\r\n        }\r\n        return (prop in elem) ? elem[prop] : elem.document.documentElement[method];\r\n      } else {\r\n        if (isValueDefined) {\r\n          elem[method] = value;\r\n        }\r\n        return elem[method];\r\n      }\r\n    }\r\n\r\n    if (window.getComputedStyle) {\r\n      getStyle = (elem) => window.getComputedStyle(elem, null);\r\n      convertToPx = (elem, value) => parseFloat(value);\r\n    } else {\r\n      getStyle = (elem) => elem.currentStyle;\r\n      convertToPx = (elem, value) => {\r\n        let left, result, rs, rsLeft, style;\r\n        let core_pnum = /[+-]?(?:\\d*\\.|)\\d+(?:[eE][+-]?\\d+|)/.source;\r\n        let rnumnonpx = new RegExp('^(' + core_pnum + ')(?!px)[a-z%]+$', 'i');\r\n\r\n        if (!rnumnonpx.test(value)) {\r\n          return parseFloat(value);\r\n        }\r\n\r\n        // ported from JQuery\r\n        style = elem.style;\r\n        left = style.left;\r\n        rs = elem.runtimeStyle;\r\n        rsLeft = rs && rs.left;\r\n        if (rs) {\r\n          rs.left = style.left;\r\n        }\r\n        // put in the new values to get a computed style out\r\n        style.left = value;\r\n        result = style.pixelLeft;\r\n        style.left = left;\r\n        if (rsLeft) {\r\n          rs.left = rsLeft;\r\n        }\r\n        return result;\r\n      };\r\n    }\r\n\r\n    function getMeasurements(elem, measure) {\r\n      let base, borderA, borderB, computedMarginA, computedMarginB, computedStyle, dirA, dirB, marginA, marginB, paddingA, paddingB;\r\n\r\n      if (isWindow(elem)) {\r\n        base = document.documentElement[{height: 'clientHeight', width: 'clientWidth'}[measure]];\r\n\r\n        return {\r\n          base: base,\r\n          padding: 0,\r\n          border: 0,\r\n          margin: 0\r\n        };\r\n      }\r\n\r\n      // Start with offset property\r\n      [\r\n        base,\r\n        dirA,\r\n        dirB\r\n      ] = {\r\n        width: [\r\n          elem.offsetWidth,\r\n          'Left',\r\n          'Right'\r\n        ],\r\n        height: [\r\n          elem.offsetHeight,\r\n          'Top',\r\n          'Bottom'\r\n        ]\r\n      }[measure];\r\n\r\n      computedStyle = getStyle(elem);\r\n      paddingA = convertToPx(elem, computedStyle['padding' + dirA]) || 0;\r\n      paddingB = convertToPx(elem, computedStyle['padding' + dirB]) || 0;\r\n      borderA = convertToPx(elem, computedStyle['border' + dirA + 'Width']) || 0;\r\n      borderB = convertToPx(elem, computedStyle['border' + dirB + 'Width']) || 0;\r\n      computedMarginA = computedStyle['margin' + dirA];\r\n      computedMarginB = computedStyle['margin' + dirB];\r\n\r\n      // I do not care for width for now, so this hack is irrelevant\r\n      // if ( !supportsPercentMargin )\r\n      // computedMarginA = hackPercentMargin( elem, computedStyle, computedMarginA )\r\n      // computedMarginB = hackPercentMargin( elem, computedStyle, computedMarginB )\r\n      marginA = convertToPx(elem, computedMarginA) || 0;\r\n      marginB = convertToPx(elem, computedMarginB) || 0;\r\n\r\n      return {\r\n        base: base,\r\n        padding: paddingA + paddingB,\r\n        border: borderA + borderB,\r\n        margin: marginA + marginB\r\n      };\r\n    }\r\n\r\n    function getWidthHeight(elem, direction, measure) {\r\n      let computedStyle, result;\r\n\r\n      let measurements = getMeasurements(elem, direction);\r\n\r\n      if (measurements.base > 0) {\r\n        return {\r\n          base: measurements.base - measurements.padding - measurements.border,\r\n          outer: measurements.base,\r\n          outerfull: measurements.base + measurements.margin\r\n        }[measure];\r\n      }\r\n\r\n      // Fall back to computed then uncomputed css if necessary\r\n      computedStyle = getStyle(elem);\r\n      result = computedStyle[direction];\r\n\r\n      if (result < 0 || result === null) {\r\n        result = elem.style[direction] || 0;\r\n      }\r\n\r\n      // Normalize \"\", auto, and prepare for extra\r\n      result = parseFloat(result) || 0;\r\n\r\n      return {\r\n        base: result - measurements.padding - measurements.border,\r\n        outer: result,\r\n        outerfull: result + measurements.padding + measurements.border + measurements.margin\r\n      }[measure];\r\n    }\r\n\r\n    // define missing methods\r\n    return angular.forEach({\r\n      before(newElem) {\r\n        var children, elem, i, j, parent, ref, self;\r\n        self = this;\r\n        elem = self[0];\r\n        parent = self.parent();\r\n        children = parent.contents();\r\n        if (children[0] === elem) {\r\n          return parent.prepend(newElem);\r\n        } else {\r\n          for (i = j = 1, ref = children.length - 1; 1 <= ref ? j <= ref : j >= ref; i = 1 <= ref ? ++j : --j) {\r\n            if (children[i] === elem) {\r\n              angular.element(children[i - 1]).after(newElem);\r\n              return;\r\n            }\r\n          }\r\n          throw new Error('invalid DOM structure ' + elem.outerHTML);\r\n        }\r\n      },\r\n      height (value){\r\n        var self;\r\n        self = this;\r\n        if (typeof value !== 'undefined') {\r\n          if (angular.isNumber(value)) {\r\n            value = value + 'px';\r\n          }\r\n          return css.call(self, 'height', value);\r\n        } else {\r\n          return getWidthHeight(this[0], 'height', 'base');\r\n        }\r\n      },\r\n      outerHeight(option) {\r\n        return getWidthHeight(this[0], 'height', option ? 'outerfull' : 'outer');\r\n      },\r\n      outerWidth(option) {\r\n        return getWidthHeight(this[0], 'width', option ? 'outerfull' : 'outer');\r\n      },\r\n\r\n      /*\r\n       The offset setter method is not implemented\r\n       */\r\n      offset(value) {\r\n        let docElem, win;\r\n        let self = this;\r\n        let box = {\r\n          top: 0,\r\n          left: 0\r\n        };\r\n        let elem = self[0];\r\n        let doc = elem && elem.ownerDocument;\r\n\r\n        if (arguments.length) {\r\n          if (value === undefined) {\r\n            return self;\r\n          }\r\n          // TODO: implement setter\r\n          throw new Error('offset setter method is not implemented');\r\n        }\r\n\r\n        if (!doc) {\r\n          return;\r\n        }\r\n\r\n        docElem = doc.documentElement;\r\n\r\n        // TODO: Make sure it's not a disconnected DOM node\r\n\r\n        if (elem.getBoundingClientRect != null) {\r\n          box = elem.getBoundingClientRect();\r\n        }\r\n\r\n        win = doc.defaultView || doc.parentWindow;\r\n\r\n        return {\r\n          top: box.top + (win.pageYOffset || docElem.scrollTop) - (docElem.clientTop || 0),\r\n          left: box.left + (win.pageXOffset || docElem.scrollLeft) - (docElem.clientLeft || 0)\r\n        };\r\n      },\r\n      scrollTop(value) {\r\n        return scrollTo(this, 'top', value);\r\n      },\r\n      scrollLeft(value) {\r\n        return scrollTo(this, 'left', value);\r\n      }\r\n    }, (value, key) => {\r\n      if (!element.prototype[key]) {\r\n        return element.prototype[key] = value;\r\n      }\r\n    });\r\n  }\r\n\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/jqLiteExtras.js","const hideClassToken = 'ng-ui-scroll-hide';\r\n\r\nexport default class ElementRoutines {\r\n\r\n  static addCSSRules() {\r\n    const selector = '.' + hideClassToken;\r\n    const rules = 'display: none';\r\n    const sheet = document.styleSheets[0];\r\n    let index;\r\n    try {\r\n      index = sheet.cssRules.length;\r\n    } catch (err) {\r\n      index = 0;\r\n    }\r\n    if('insertRule' in sheet) {\r\n      sheet.insertRule(selector + '{' + rules + '}', index);\r\n    }\r\n    else if('addRule' in sheet) {\r\n      sheet.addRule(selector, rules, index);\r\n    }\r\n  }\r\n\r\n  constructor($injector, $q) {\r\n    this.$animate = ($injector.has && $injector.has('$animate')) ? $injector.get('$animate') : null;\r\n    this.isAngularVersionLessThen1_3 = angular.version.major === 1 && angular.version.minor < 3;\r\n    this.$q = $q;\r\n  }\r\n\r\n  hideElement(wrapper) {\r\n    wrapper.element.addClass(hideClassToken);\r\n  }\r\n\r\n  showElement(wrapper) {\r\n    wrapper.element.removeClass(hideClassToken);\r\n  }\r\n\r\n  insertElement(newElement, previousElement) {\r\n    previousElement.after(newElement);\r\n    return [];\r\n  }\r\n\r\n  removeElement(wrapper) {\r\n    wrapper.element.remove();\r\n    wrapper.scope.$destroy();\r\n    return [];\r\n  }\r\n\r\n  insertElementAnimated(newElement, previousElement) {\r\n    if (!this.$animate) {\r\n      return this.insertElement(newElement, previousElement);\r\n    }\r\n\r\n    if (this.isAngularVersionLessThen1_3) {\r\n      const deferred = this.$q.defer();\r\n      // no need for parent - previous element is never null\r\n      this.$animate.enter(newElement, null, previousElement, () => deferred.resolve());\r\n\r\n      return [deferred.promise];\r\n    }\r\n\r\n    // no need for parent - previous element is never null\r\n    return [this.$animate.enter(newElement, null, previousElement)];\r\n  }\r\n\r\n  removeElementAnimated(wrapper) {\r\n    if (!this.$animate) {\r\n      return this.removeElement(wrapper);\r\n    }\r\n\r\n    if (this.isAngularVersionLessThen1_3) {\r\n      const deferred = this.$q.defer();\r\n      this.$animate.leave(wrapper.element, () => {\r\n        wrapper.scope.$destroy();\r\n        return deferred.resolve();\r\n      });\r\n\r\n      return [deferred.promise];\r\n    }\r\n\r\n    return [(this.$animate.leave(wrapper.element)).then(() => wrapper.scope.$destroy())];\r\n  }\r\n}\n\n\n// WEBPACK FOOTER //\n// ./src/modules/elementRoutines.js","export default function ScrollBuffer(elementRoutines, bufferSize, startIndex) {\r\n  const buffer = Object.create(Array.prototype);\r\n\r\n  angular.extend(buffer, {\r\n    size: bufferSize,\r\n\r\n    reset(startIndex) {\r\n      buffer.remove(0, buffer.length);\r\n      buffer.eof = false;\r\n      buffer.bof = false;\r\n      buffer.first = startIndex;\r\n      buffer.next = startIndex;\r\n      buffer.minIndex = startIndex;\r\n      buffer.maxIndex = startIndex;\r\n      buffer.minIndexUser = null;\r\n      buffer.maxIndexUser = null;\r\n    },\r\n\r\n    append(items) {\r\n      items.forEach((item) => {\r\n        ++buffer.next;\r\n        buffer.insert('append', item);\r\n      });\r\n      buffer.maxIndex = buffer.eof ? buffer.next - 1 : Math.max(buffer.next - 1, buffer.maxIndex);\r\n    },\r\n\r\n    prepend(items) {\r\n      items.reverse().forEach((item) => {\r\n        --buffer.first;\r\n        buffer.insert('prepend', item);\r\n      });\r\n      buffer.minIndex = buffer.bof ? buffer.minIndex = buffer.first : Math.min(buffer.first, buffer.minIndex);\r\n    },\r\n\r\n    /**\r\n     * inserts wrapped element in the buffer\r\n     * the first argument is either operation keyword (see below) or a number for operation 'insert'\r\n     * for insert the number is the index for the buffer element the new one have to be inserted after\r\n     * operations: 'append', 'prepend', 'insert', 'remove', 'update', 'none'\r\n     */\r\n    insert(operation, item, isTop) {\r\n      const wrapper = {\r\n        item: item\r\n      };\r\n\r\n      if (operation % 1 === 0) {// it is an insert\r\n        wrapper.op = 'insert';\r\n        buffer.splice(operation, 0, wrapper);\r\n        if(isTop) {\r\n          buffer.first--;\r\n        }\r\n        else {\r\n          buffer.next++;\r\n        }\r\n      } else {\r\n        wrapper.op = operation;\r\n        switch (operation) {\r\n          case 'append':\r\n            buffer.push(wrapper);\r\n            break;\r\n          case 'prepend':\r\n            buffer.unshift(wrapper);\r\n            break;\r\n        }\r\n      }\r\n    },\r\n\r\n    // removes elements from buffer\r\n    remove(arg1, arg2) {\r\n      if (angular.isNumber(arg1)) {\r\n        // removes items from arg1 (including) through arg2 (excluding)\r\n        for (let i = arg1; i < arg2; i++) {\r\n          elementRoutines.removeElement(buffer[i]);\r\n        }\r\n        return buffer.splice(arg1, arg2 - arg1);\r\n      }\r\n      // removes single item(wrapper) from the buffer\r\n      buffer.splice(buffer.indexOf(arg1), 1);\r\n      if(arg1._op === 'isTop' && buffer.first === this.getAbsMinIndex()) {\r\n        this.incrementMinIndex();\r\n      }\r\n      else {\r\n        this.decrementMaxIndex();\r\n      }\r\n      if(arg1._op === 'isTop') {\r\n        buffer.first++;\r\n      }\r\n      else {\r\n        buffer.next--;\r\n      }\r\n      if(!buffer.length) {\r\n        buffer.first = 1;\r\n        buffer.next = 1;\r\n      }\r\n\r\n      return elementRoutines.removeElementAnimated(arg1);\r\n    },\r\n\r\n    incrementMinIndex() {\r\n      if(buffer.minIndexUser !== null) {\r\n        if(buffer.minIndex > buffer.minIndexUser) {\r\n          buffer.minIndexUser++;\r\n          return;\r\n        }\r\n        if(buffer.minIndex === buffer.minIndexUser) {\r\n          buffer.minIndexUser++;\r\n        }\r\n      }\r\n      buffer.minIndex++;\r\n    },\r\n\r\n    decrementMaxIndex() {\r\n      if(buffer.maxIndexUser !== null && buffer.maxIndex <= buffer.maxIndexUser) {\r\n        buffer.maxIndexUser--;\r\n      }\r\n      buffer.maxIndex--;\r\n    },\r\n\r\n    getAbsMinIndex() {\r\n      if(buffer.minIndexUser !== null) {\r\n        return Math.min(buffer.minIndexUser, buffer.minIndex);\r\n      }\r\n      return buffer.minIndex;\r\n    },\r\n\r\n    getAbsMaxIndex() {\r\n      if(buffer.maxIndexUser !== null) {\r\n        return Math.max(buffer.maxIndexUser, buffer.maxIndex);\r\n      }\r\n      return buffer.maxIndex;\r\n    },\r\n\r\n    effectiveHeight(elements) {\r\n      if (!elements.length) {\r\n        return 0;\r\n      }\r\n      let top = Number.MAX_VALUE;\r\n      let bottom = Number.NEGATIVE_INFINITY;\r\n      elements.forEach((wrapper) => {\r\n        if (wrapper.element[0].offsetParent) {\r\n          // element style is not display:none\r\n          top = Math.min(top, wrapper.element.offset().top);\r\n          bottom = Math.max(bottom, wrapper.element.offset().top + wrapper.element.outerHeight(true));\r\n        }\r\n      });\r\n      return Math.max(0, bottom - top);\r\n    }\r\n\r\n  });\r\n\r\n  buffer.reset(startIndex);\r\n\r\n  return buffer;\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/buffer.js","import Padding from './padding';\r\n\r\nexport default function Viewport(elementRoutines, buffer, element, viewportController, $rootScope, padding) {\r\n  let topPadding = null;\r\n  let bottomPadding = null;\r\n  const viewport = viewportController && viewportController.viewport ? viewportController.viewport : angular.element(window);\r\n  const container = viewportController && viewportController.container ? viewportController.container : undefined;\r\n  const scope = viewportController && viewportController.scope ? viewportController.scope : $rootScope;\r\n\r\n  viewport.css({\r\n    'overflow-anchor': 'none',\r\n    'overflow-y': 'auto',\r\n    'display': 'block'\r\n  });\r\n\r\n  function bufferPadding() {\r\n    return viewport.outerHeight() * padding; // some extra space to initiate preload\r\n  }\r\n\r\n  angular.extend(viewport, {\r\n    getScope() {\r\n      return scope;\r\n    },\r\n\r\n    createPaddingElements(template) {\r\n      topPadding = new Padding(template);\r\n      bottomPadding = new Padding(template);\r\n      element.before(topPadding.element);\r\n      element.after(bottomPadding.element);\r\n      topPadding.height(0);\r\n      bottomPadding.height(0);\r\n    },\r\n\r\n    applyContainerStyle() {\r\n      if (!container) {\r\n        return true;\r\n      }\r\n      if(container !== viewport) {\r\n        viewport.css('height', window.getComputedStyle(container[0]).height);\r\n      }\r\n      return viewport.height() > 0;\r\n    },\r\n\r\n    bottomDataPos() {\r\n      let scrollHeight = viewport[0].scrollHeight;\r\n      scrollHeight = scrollHeight != null ? scrollHeight : viewport[0].document.documentElement.scrollHeight;\r\n      return scrollHeight - bottomPadding.height();\r\n    },\r\n\r\n    topDataPos() {\r\n      return topPadding.height();\r\n    },\r\n\r\n    bottomVisiblePos() {\r\n      return viewport.scrollTop() + viewport.outerHeight();\r\n    },\r\n\r\n    topVisiblePos() {\r\n      return viewport.scrollTop();\r\n    },\r\n\r\n    insertElement(e, sibling) {\r\n      return elementRoutines.insertElement(e, sibling || topPadding.element);\r\n    },\r\n\r\n    insertElementAnimated(e, sibling) {\r\n      return elementRoutines.insertElementAnimated(e, sibling || topPadding.element);\r\n    },\r\n\r\n    shouldLoadBottom() {\r\n      return !buffer.eof && viewport.bottomDataPos() < viewport.bottomVisiblePos() + bufferPadding();\r\n    },\r\n\r\n    clipBottom() {\r\n      // clip the invisible items off the bottom\r\n      let overage = 0;\r\n      let overageHeight = 0;\r\n      let itemHeight = 0;\r\n      let emptySpaceHeight = viewport.bottomDataPos() - viewport.bottomVisiblePos() - bufferPadding();\r\n\r\n      for (let i = buffer.length - 1; i >= 0; i--) {\r\n        itemHeight = buffer[i].element.outerHeight(true);\r\n        if (overageHeight + itemHeight > emptySpaceHeight) {\r\n          break;\r\n        }\r\n        bottomPadding.cache.add(buffer[i]);\r\n        overageHeight += itemHeight;\r\n        overage++;\r\n      }\r\n\r\n      if (overage > 0) {\r\n        buffer.eof = false;\r\n        buffer.remove(buffer.length - overage, buffer.length);\r\n        buffer.next -= overage;\r\n        viewport.adjustPaddings();\r\n      }\r\n    },\r\n\r\n    shouldLoadTop() {\r\n      return !buffer.bof && (viewport.topDataPos() > viewport.topVisiblePos() - bufferPadding());\r\n    },\r\n\r\n    clipTop() {\r\n      // clip the invisible items off the top\r\n      let overage = 0;\r\n      let overageHeight = 0;\r\n      let itemHeight = 0;\r\n      let emptySpaceHeight = viewport.topVisiblePos() - viewport.topDataPos() - bufferPadding();\r\n\r\n      for (let i = 0; i < buffer.length; i++) {\r\n        itemHeight = buffer[i].element.outerHeight(true);\r\n        if (overageHeight + itemHeight > emptySpaceHeight) {\r\n          break;\r\n        }\r\n        topPadding.cache.add(buffer[i]);\r\n        overageHeight += itemHeight;\r\n        overage++;\r\n      }\r\n\r\n      if (overage > 0) {\r\n        // we need to adjust top padding element before items are removed from top\r\n        // to avoid strange behaviour of scroll bar during remove top items when we are at the very bottom\r\n        topPadding.height(topPadding.height() + overageHeight);\r\n        buffer.bof = false;\r\n        buffer.remove(0, overage);\r\n        buffer.first += overage;\r\n      }\r\n    },\r\n\r\n    adjustPaddings() {\r\n      if (!buffer.length) {\r\n        return;\r\n      }\r\n\r\n      // precise heights calculation based on items that are in buffer or that were in buffer once\r\n      const visibleItemsHeight = buffer.reduce((summ, item) => summ + item.element.outerHeight(true), 0);\r\n\r\n      let topPaddingHeight = 0, topCount = 0;\r\n      topPadding.cache.forEach(item => {\r\n        if(item.index < buffer.first) {\r\n          topPaddingHeight += item.height;\r\n          topCount++;\r\n        }\r\n      });\r\n\r\n      let bottomPaddingHeight = 0, bottomCount = 0;\r\n      bottomPadding.cache.forEach(item => {\r\n        if(item.index >= buffer.next) {\r\n          bottomPaddingHeight += item.height;\r\n          bottomCount++;\r\n        }\r\n      });\r\n\r\n      const totalHeight = visibleItemsHeight + topPaddingHeight + bottomPaddingHeight;\r\n      const averageItemHeight = totalHeight / (topCount + bottomCount + buffer.length);\r\n\r\n      // average heights calculation, items that have never been reached\r\n      let adjustTopPadding = buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser;\r\n      let adjustBottomPadding = buffer.maxIndexUser !== null && buffer.maxIndex < buffer.maxIndexUser;\r\n      let topPaddingHeightAdd = adjustTopPadding ? (buffer.minIndex - buffer.minIndexUser) * averageItemHeight : 0;\r\n      let bottomPaddingHeightAdd = adjustBottomPadding ? (buffer.maxIndexUser - buffer.maxIndex) * averageItemHeight : 0;\r\n\r\n      // paddings combine adjustment\r\n      topPadding.height(topPaddingHeight + topPaddingHeightAdd);\r\n      bottomPadding.height(bottomPaddingHeight + bottomPaddingHeightAdd);\r\n    },\r\n\r\n    onAfterMinIndexSet(topPaddingHeightOld) {\r\n      // additional scrollTop adjustment in case of datasource.minIndex external set\r\n      if (buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser) {\r\n        let diff = topPadding.height() - topPaddingHeightOld;\r\n        viewport.scrollTop(viewport.scrollTop() + diff);\r\n        while((diff -= viewport.scrollTop()) > 0) {\r\n          bottomPadding.height(bottomPadding.height() + diff);\r\n          viewport.scrollTop(viewport.scrollTop() + diff);\r\n        }\r\n      }\r\n    },\r\n\r\n    onAfterPrepend(updates) {\r\n      if (!updates.prepended.length)\r\n        return;\r\n      const height = buffer.effectiveHeight(updates.prepended);\r\n      const paddingHeight = topPadding.height() - height;\r\n      if (paddingHeight >= 0) {\r\n        topPadding.height(paddingHeight);\r\n      }\r\n      else {\r\n        topPadding.height(0);\r\n        viewport.scrollTop(viewport.scrollTop() - paddingHeight);\r\n      }\r\n    },\r\n\r\n    resetTopPadding() {\r\n      topPadding.height(0);\r\n      topPadding.cache.clear();\r\n    },\r\n\r\n    resetBottomPadding() {\r\n      bottomPadding.height(0);\r\n      bottomPadding.cache.clear();\r\n    },\r\n\r\n    removeCacheItem(item, isTop) {\r\n      topPadding.cache.remove(item, isTop);\r\n      bottomPadding.cache.remove(item, isTop);\r\n    },\r\n\r\n    removeItem(item) {\r\n      this.removeCacheItem(item);\r\n      return buffer.remove(item);\r\n    }\r\n  });\r\n\r\n  return viewport;\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/viewport.js","// Can't just extend the Array, due to Babel does not support built-in classes extending\r\n// This solution was taken from https://stackoverflow.com/questions/46897414/es6-class-extends-array-workaround-for-es5-babel-transpile\r\nclass CacheProto {\r\n  add(item) {\r\n    for (let i = this.length - 1; i >= 0; i--) {\r\n      if (this[i].index === item.scope.$index) {\r\n        this[i].height = item.element.outerHeight();\r\n        return;\r\n      }\r\n    }\r\n    this.push({\r\n      index: item.scope.$index,\r\n      height: item.element.outerHeight()\r\n    });\r\n    this.sort((a, b) => ((a.index < b.index) ? -1 : ((a.index > b.index) ? 1 : 0)));\r\n  }\r\n\r\n  remove(argument, _isTop) {\r\n    const index = argument % 1 === 0 ? argument : argument.scope.$index;\r\n    const isTop = argument % 1 === 0 ? _isTop : argument._op === 'isTop';\r\n    for (let i = this.length - 1; i >= 0; i--) {\r\n      if (this[i].index === index) {\r\n        this.splice(i, 1);\r\n        break;\r\n      }\r\n    }\r\n    if(!isTop) {\r\n      for (let i = this.length - 1; i >= 0; i--) {\r\n        if (this[i].index > index) {\r\n          this[i].index--;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  clear() {\r\n    this.length = 0;\r\n  }\r\n}\r\n\r\nfunction Cache() {\r\n  const instance = [];\r\n  instance.push.apply(instance, arguments);\r\n  Object.setPrototypeOf(instance, Cache.prototype);\r\n  return instance;\r\n}\r\nCache.prototype = Object.create(Array.prototype);\r\nObject.getOwnPropertyNames(CacheProto.prototype).forEach(methodName =>\r\n  Cache.prototype[methodName] = CacheProto.prototype[methodName]\r\n);\r\n\r\nfunction generateElement(template) {\r\n  if(template.nodeType !== Node.ELEMENT_NODE) {\r\n    throw new Error('ui-scroll directive requires an Element node for templating the view');\r\n  }\r\n  let element;\r\n  switch (template.tagName.toLowerCase()) {\r\n    case 'dl':\r\n      throw new Error(`ui-scroll directive does not support <${template.tagName}> as a repeating tag: ${template.outerHTML}`);\r\n    case 'tr':\r\n      let table = angular.element('<table><tr><td><div></div></td></tr></table>');\r\n      element = table.find('tr');\r\n      break;\r\n    case 'li':\r\n      element = angular.element('<li></li>');\r\n      break;\r\n    default:\r\n      element = angular.element('<div></div>');\r\n  }\r\n  return element;\r\n}\r\n\r\nclass Padding {\r\n  constructor(template) {\r\n    this.element = generateElement(template);\r\n    this.cache = new Cache();\r\n  }\r\n\r\n  height() {\r\n    return this.element.height.apply(this.element, arguments);\r\n  }\r\n}\r\n\r\nexport default Padding;\n\n\n// WEBPACK FOOTER //\n// ./src/modules/padding.js","class Adapter {\r\n\r\n  constructor($scope, $parse, $attr, viewport, buffer, doAdjust, reload) {\r\n    this.$parse = $parse;\r\n    this.$attr = $attr;\r\n    this.viewport = viewport;\r\n    this.buffer = buffer;\r\n\r\n    this.doAdjust = doAdjust;\r\n    this.reload = reload;\r\n\r\n    this.isLoading = false;\r\n    this.disabled = false;\r\n\r\n    const viewportScope = viewport.getScope();\r\n    this.startScope = viewportScope.$parent ? viewportScope : $scope;\r\n\r\n    this.publicContext = {};\r\n    this.assignAdapter($attr.adapter);\r\n    this.generatePublicContext();\r\n  }\r\n\r\n  assignAdapter(adapterAttr) {\r\n    if (!adapterAttr || !(adapterAttr = adapterAttr.replace(/^\\s+|\\s+$/gm, ''))) {\r\n      return;\r\n    }\r\n    let adapterOnScope;\r\n\r\n    try {\r\n      this.$parse(adapterAttr).assign(this.startScope, {});\r\n      adapterOnScope = this.$parse(adapterAttr)(this.startScope);\r\n    }\r\n    catch (error) {\r\n      error.message = `Angular ui-scroll Adapter assignment exception.\\n` +\r\n        `Can't parse \"${adapterAttr}\" expression.\\n` +\r\n        error.message;\r\n      throw error;\r\n    }\r\n\r\n    angular.extend(adapterOnScope, this.publicContext);\r\n    this.publicContext = adapterOnScope;\r\n  }\r\n\r\n  generatePublicContext() {\r\n    // these methods will be accessible out of ui-scroll via user defined adapter\r\n    const publicMethods = ['reload', 'applyUpdates', 'append', 'prepend', 'isBOF', 'isEOF', 'isEmpty'];\r\n    for (let i = publicMethods.length - 1; i >= 0; i--) {\r\n      this.publicContext[publicMethods[i]] = this[publicMethods[i]].bind(this);\r\n    }\r\n\r\n    // these read-only props will be accessible out of ui-scroll via user defined adapter\r\n    const publicProps = ['isLoading', 'topVisible', 'topVisibleElement', 'topVisibleScope', 'bottomVisible', 'bottomVisibleElement', 'bottomVisibleScope'];\r\n    for (let i = publicProps.length - 1; i >= 0; i--) {\r\n      let property, attr = this.$attr[publicProps[i]];\r\n      Object.defineProperty(this, publicProps[i], {\r\n        get: () => property,\r\n        set: (value) => {\r\n          property = value;\r\n          this.publicContext[publicProps[i]] = value;\r\n          if (attr) {\r\n            this.$parse(attr).assign(this.startScope, value);\r\n          }\r\n        }\r\n      });\r\n    }\r\n\r\n    // non-read-only public property\r\n    Object.defineProperty(this.publicContext, 'disabled', {\r\n      get: () => this.disabled,\r\n      set: (value) => (!(this.disabled = value)) ? this.doAdjust() : null\r\n    });\r\n  }\r\n\r\n  loading(value) {\r\n    this.isLoading = value;\r\n  }\r\n\r\n  isBOF() {\r\n    return this.buffer.bof;\r\n  }\r\n\r\n  isEOF() {\r\n    return this.buffer.eof;\r\n  }\r\n\r\n  isEmpty() {\r\n    return !this.buffer.length;\r\n  }\r\n\r\n  append(newItems) {\r\n    this.buffer.append(newItems);\r\n    this.doAdjust();\r\n    this.viewport.clipTop();\r\n    this.viewport.clipBottom();\r\n  }\r\n\r\n  prepend(newItems) {\r\n    this.buffer.prepend(newItems);\r\n    this.doAdjust();\r\n    this.viewport.clipTop();\r\n    this.viewport.clipBottom();\r\n  }\r\n\r\n  applyUpdates(arg1, arg2) {\r\n    if (typeof arg1 === 'function') {\r\n      this.applyUpdatesFunc(arg1);\r\n    } else {\r\n      this.applyUpdatesIndex(arg1, arg2);\r\n    }\r\n    this.doAdjust();\r\n  }\r\n\r\n  applyUpdatesFunc(cb) {\r\n    this.buffer.slice(0).forEach((wrapper) => {\r\n      // we need to do it on the buffer clone, because buffer content\r\n      // may change as we iterate through\r\n      this.applyUpdate(wrapper, cb(wrapper.item, wrapper.scope, wrapper.element));\r\n    });\r\n  }\r\n\r\n  applyUpdatesIndex(index, newItems) {\r\n    if (index % 1 !== 0) {\r\n      throw new Error('applyUpdates - ' + index + ' is not a valid index (should be an integer)');\r\n    }\r\n    const _index = index - this.buffer.first;\r\n\r\n    // apply updates only within buffer\r\n    if (_index >= 0 && _index < this.buffer.length) {\r\n      this.applyUpdate(this.buffer[_index], newItems);\r\n    }\r\n    // out-of-buffer case: deletion may affect Paddings\r\n    else if(index >= this.buffer.getAbsMinIndex() && index <= this.buffer.getAbsMaxIndex()) {\r\n      if(angular.isArray(newItems) && !newItems.length) {\r\n        this.viewport.removeCacheItem(index, index === this.buffer.minIndex);\r\n        if(index === this.buffer.getAbsMinIndex()) {\r\n          this.buffer.incrementMinIndex();\r\n        }\r\n        else {\r\n          this.buffer.decrementMaxIndex();\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  applyUpdate(wrapper, newItems) {\r\n    if (!angular.isArray(newItems)) {\r\n      return;\r\n    }\r\n    let position = this.buffer.indexOf(wrapper);\r\n    if (!newItems.reverse().some(newItem => newItem === wrapper.item)) {\r\n      wrapper.op = 'remove';\r\n      if(position === 0 && !newItems.length) {\r\n        wrapper._op = 'isTop'; // to catch \"first\" edge case on remove\r\n      }\r\n    }\r\n    newItems.forEach((newItem) => {\r\n      if (newItem === wrapper.item) {\r\n        position--;\r\n      } else {\r\n        // 3 parameter (isTop) is to catch \"first\" edge case on insert\r\n        this.buffer.insert(position + 1, newItem, position === -1);\r\n      }\r\n    });\r\n  }\r\n\r\n  calculateProperties() {\r\n    let rowTop = null, topHeight = 0;\r\n    let topDone = false, bottomDone = false;\r\n    const length = this.buffer.length;\r\n\r\n    for (let i = 0; i < length; i++) {\r\n      const item = this.buffer[i];\r\n      const itemTop = item.element.offset().top;\r\n\r\n      if (rowTop !== itemTop) { // a new row condition\r\n        const itemHeight = item.element.outerHeight(true);\r\n        const top = this.viewport.topDataPos() + topHeight + itemHeight;\r\n\r\n        if (!topDone && top > this.viewport.topVisiblePos()) {\r\n          topDone = true;\r\n          this['topVisible'] = item.item;\r\n          this['topVisibleElement'] = item.element;\r\n          this['topVisibleScope'] = item.scope;\r\n        }\r\n        if (!bottomDone && (top >= this.viewport.bottomVisiblePos() || (i === length - 1 && this.isEOF()))) {\r\n          bottomDone = true;\r\n          this['bottomVisible'] = item.item;\r\n          this['bottomVisibleElement'] = item.element;\r\n          this['bottomVisibleScope'] = item.scope;\r\n        }\r\n        topHeight += itemHeight;\r\n      }\r\n      rowTop = itemTop;\r\n\r\n      if (topDone && bottomDone) {\r\n        break;\r\n      }\r\n    }\r\n  }\r\n\r\n}\r\n\r\nexport default Adapter;\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/adapter.js"],"sourceRoot":""}
\ No newline at end of file
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return this;\n    }]\n  };\n}).directive('uiScroll', ['$log', '$injector', '$rootScope', '$timeout', '$interval', '$q', '$parse', function (console, $injector, $rootScope, $timeout, $interval, $q, $parse) {\n\n  return {\n    require: ['?^uiScrollViewport'],\n    restrict: 'A',\n    transclude: 'element',\n    priority: 1000,\n    terminal: true,\n    link: link\n  };\n\n  function link($scope, element, $attr, controllers, linker) {\n    var match = $attr.uiScroll.match(/^\\s*(\\w+)\\s+in\\s+([(\\w|\\$)\\.]+)\\s*$/);\n    if (!match) {\n      throw new Error('Expected uiScroll in form of \\'_item_ in _datasource_\\' but got \\'' + $attr.uiScroll + '\\'');\n    }\n\n    function parseNumericAttr(value, defaultValue) {\n      var result = $parse(value)($scope);\n      return isNaN(result) ? defaultValue : result;\n    }\n\n    var BUFFER_MIN = 3;\n    var BUFFER_DEFAULT = 10;\n    var PADDING_MIN = 0.01;\n    var PADDING_DEFAULT = 0.5;\n    var MAX_VIEWPORT_DELAY = 500;\n    var VIEWPORT_POLLING_INTERVAL = 50;\n\n    var datasource = null;\n    var itemName = match[1];\n    var datasourceName = match[2];\n    var viewportController = controllers[0];\n    var bufferSize = Math.max(BUFFER_MIN, parseNumericAttr($attr.bufferSize, BUFFER_DEFAULT));\n    var padding = Math.max(PADDING_MIN, parseNumericAttr($attr.padding, PADDING_DEFAULT));\n    var startIndex = parseNumericAttr($attr.startIndex, 1);\n    var ridActual = 0; // current data revision id\n    var pending = [];\n\n    var elementRoutines = new _elementRoutines2.default($injector, $q);\n    var buffer = new _buffer2.default(elementRoutines, bufferSize, startIndex);\n    var viewport = new _viewport2.default(elementRoutines, buffer, element, viewportController, $rootScope, padding);\n    var adapter = new _adapter2.default($scope, $parse, $attr, viewport, buffer, doAdjust, reload);\n\n    if (viewportController) {\n      viewportController.adapter = adapter;\n    }\n\n    var isDatasourceValid = function isDatasourceValid() {\n      return Object.prototype.toString.call(datasource) === '[object Object]' && typeof datasource.get === 'function';\n    };\n\n    datasource = $parse(datasourceName)($scope); // try to get datasource on scope\n    if (!isDatasourceValid()) {\n      datasource = $injector.get(datasourceName); // try to inject datasource as service\n      if (!isDatasourceValid()) {\n        throw new Error(datasourceName + ' is not a valid datasource');\n      }\n    }\n\n    var onRenderHandlers = [];\n    function onRenderHandlersRunner() {\n      onRenderHandlers.forEach(function (handler) {\n        return handler.run();\n      });\n      onRenderHandlers = [];\n    }\n    function persistDatasourceIndex(datasource, propName) {\n      var getter = void 0;\n      // need to postpone min/maxIndexUser processing if the view is empty\n      if (angular.isNumber(datasource[propName])) {\n        getter = datasource[propName];\n        if (angular.isNumber(getter)) {\n          onRenderHandlers = onRenderHandlers.filter(function (handler) {\n            return handler.id !== propName;\n          });\n          onRenderHandlers.push({\n            id: propName,\n            run: function run() {\n              return datasource[propName] = getter;\n            }\n          });\n        }\n      }\n    }\n\n    function defineDatasourceIndex(datasource, propName, propUserName) {\n      var descriptor = Object.getOwnPropertyDescriptor(datasource, propName);\n      if (descriptor && (descriptor.set || descriptor.get)) {\n        return;\n      }\n      var getter = void 0;\n      persistDatasourceIndex(datasource, propName);\n      Object.defineProperty(datasource, propName, {\n        set: function set(value) {\n          getter = value;\n          if (pending.length && !buffer.length) {\n            persistDatasourceIndex(datasource, propName);\n            return;\n          }\n          buffer[propUserName] = value;\n          var topPaddingHeightOld = viewport.topDataPos();\n          viewport.adjustPaddings();\n          if (propName === 'minIndex') {\n            viewport.onAfterMinIndexSet(topPaddingHeightOld);\n          }\n        },\n        get: function get() {\n          return getter;\n        }\n      });\n    }\n\n    defineDatasourceIndex(datasource, 'minIndex', 'minIndexUser');\n    defineDatasourceIndex(datasource, 'maxIndex', 'maxIndexUser');\n\n    var fetchNext = datasource.get.length !== 2 ? function (success) {\n      return datasource.get(buffer.next, bufferSize, success);\n    } : function (success) {\n      datasource.get({\n        index: buffer.next,\n        append: buffer.length ? buffer[buffer.length - 1].item : void 0,\n        count: bufferSize\n      }, success);\n    };\n\n    var fetchPrevious = datasource.get.length !== 2 ? function (success) {\n      return datasource.get(buffer.first - bufferSize, bufferSize, success);\n    } : function (success) {\n      datasource.get({\n        index: buffer.first - bufferSize,\n        prepend: buffer.length ? buffer[0].item : void 0,\n        count: bufferSize\n      }, success);\n    };\n\n    var initialize = function initialize() {\n      var tryCount = 0;\n      if (!viewport.applyContainerStyle()) {\n        var timer = $interval(function () {\n          tryCount++;\n          if (viewport.applyContainerStyle()) {\n            $interval.cancel(timer);\n            doAdjust();\n          }\n          if (tryCount * VIEWPORT_POLLING_INTERVAL >= MAX_VIEWPORT_DELAY) {\n            $interval.cancel(timer);\n            throw Error('ui-scroll directive requires a viewport with non-zero height in ' + MAX_VIEWPORT_DELAY + 'ms');\n          }\n        }, VIEWPORT_POLLING_INTERVAL);\n      } else {\n        doAdjust();\n      }\n    };\n\n    /**\n     * Build padding elements\n     *\n     * Calling linker is the only way I found to get access to the tag name of the template\n     * to prevent the directive scope from pollution a new scope is created and destroyed\n     * right after the builder creation is completed\n     */\n    linker(function (clone, scope) {\n      viewport.createPaddingElements(clone[0]);\n      // we do not include the clone in the DOM. It means that the nested directives will not\n      // be able to reach the parent directives, but in this case it is intentional because we\n      // created the clone to access the template tag name\n      scope.$destroy();\n      clone.remove();\n    });\n\n    $scope.$on('$destroy', function () {\n      unbindEvents();\n      viewport.unbind('mousewheel', wheelHandler);\n    });\n\n    viewport.bind('mousewheel', wheelHandler);\n\n    initialize();\n\n    /* Private function definitions */\n\n    function isInvalid(rid) {\n      return rid && rid !== ridActual || $scope.$$destroyed;\n    }\n\n    function bindEvents() {\n      viewport.bind('resize', resizeAndScrollHandler);\n      viewport.bind('scroll', resizeAndScrollHandler);\n    }\n\n    function unbindEvents() {\n      viewport.unbind('resize', resizeAndScrollHandler);\n      viewport.unbind('scroll', resizeAndScrollHandler);\n    }\n\n    function reload() {\n      viewport.resetTopPadding();\n      viewport.resetBottomPadding();\n      if (arguments.length) {\n        startIndex = arguments[0];\n      }\n      buffer.reset(startIndex);\n      persistDatasourceIndex(datasource, 'minIndex');\n      persistDatasourceIndex(datasource, 'maxIndex');\n      doAdjust();\n    }\n\n    function isElementVisible(wrapper) {\n      return wrapper.element.height() && wrapper.element[0].offsetParent;\n    }\n\n    function visibilityWatcher(wrapper) {\n      if (isElementVisible(wrapper)) {\n        buffer.forEach(function (item) {\n          if (typeof item.unregisterVisibilityWatcher === 'function') {\n            item.unregisterVisibilityWatcher();\n            delete item.unregisterVisibilityWatcher;\n          }\n        });\n        if (!pending.length) {\n          $timeout(function () {\n            return doAdjust();\n          });\n        }\n      }\n    }\n\n    function insertWrapperContent(wrapper, insertAfter) {\n      createElement(wrapper, insertAfter, viewport.insertElement);\n      if (!isElementVisible(wrapper)) {\n        wrapper.unregisterVisibilityWatcher = wrapper.scope.$watch(function () {\n          return visibilityWatcher(wrapper);\n        });\n      }\n      elementRoutines.hideElement(wrapper); // hide inserted elements before data binding\n    }\n\n    function createElement(wrapper, insertAfter, insertElement) {\n      var promises = null;\n      var sibling = insertAfter > 0 ? buffer[insertAfter - 1].element : undefined;\n      linker(function (clone, scope) {\n        promises = insertElement(clone, sibling);\n        wrapper.element = clone;\n        wrapper.scope = scope;\n        scope[itemName] = wrapper.item;\n      });\n      // ui-scroll-grid apply\n      if (adapter.transform) {\n        var tdInitializer = wrapper.scope.uiScrollTdInitializer;\n        if (tdInitializer && tdInitializer.linking) {\n          adapter.transform(wrapper.scope, wrapper.element);\n        } else {\n          wrapper.scope.uiScrollTdInitializer = {\n            onLink: function onLink() {\n              return adapter.transform(wrapper.scope, wrapper.element);\n            },\n            scope: wrapper.scope\n          };\n        }\n      }\n      return promises;\n    }\n\n    function updateDOM() {\n      var promises = [];\n      var toBePrepended = [];\n      var toBeRemoved = [];\n      var inserted = [];\n\n      buffer.forEach(function (wrapper, i) {\n        switch (wrapper.op) {\n          case 'prepend':\n            toBePrepended.unshift(wrapper);\n            break;\n          case 'append':\n            insertWrapperContent(wrapper, i);\n            wrapper.op = 'none';\n            inserted.push(wrapper);\n            break;\n          case 'insert':\n            promises = promises.concat(createElement(wrapper, i, viewport.insertElementAnimated));\n            wrapper.op = 'none';\n            inserted.push(wrapper);\n            break;\n          case 'remove':\n            toBeRemoved.push(wrapper);\n        }\n      });\n\n      toBeRemoved.forEach(function (wrapper) {\n        return promises = promises.concat(viewport.removeItem(wrapper));\n      });\n\n      if (toBePrepended.length) toBePrepended.forEach(function (wrapper) {\n        insertWrapperContent(wrapper);\n        wrapper.op = 'none';\n      });\n\n      buffer.forEach(function (item, i) {\n        return item.scope.$index = buffer.first + i;\n      });\n\n      return {\n        prepended: toBePrepended,\n        removed: toBeRemoved,\n        inserted: inserted,\n        animated: promises\n      };\n    }\n\n    function updatePaddings(rid, updates) {\n      // schedule another doAdjust after animation completion\n      if (updates.animated.length) {\n        $q.all(updates.animated).then(function () {\n          viewport.adjustPaddings();\n          doAdjust(rid);\n        });\n      } else {\n        viewport.adjustPaddings();\n      }\n    }\n\n    function enqueueFetch(rid, updates) {\n      if (viewport.shouldLoadBottom()) {\n        if (!updates || buffer.effectiveHeight(updates.inserted) > 0) {\n          // this means that at least one item appended in the last batch has height > 0\n          if (pending.push(true) === 1) {\n            adapter.loading(true);\n            fetch(rid);\n          }\n        }\n      } else if (viewport.shouldLoadTop()) {\n        if (!updates || buffer.effectiveHeight(updates.prepended) > 0 || pending[0]) {\n          // this means that at least one item appended in the last batch has height > 0\n          // pending[0] = true means that previous fetch was appending. We need to force at least one prepend\n          // BTW there will always be at least 1 element in the pending array because bottom is fetched first\n          if (pending.push(false) === 1) {\n            adapter.loading(true);\n            fetch(rid);\n          }\n        }\n      }\n    }\n\n    function processUpdates() {\n      var updates = updateDOM();\n\n      // We need the item bindings to be processed before we can do adjustments\n      !$scope.$$phase && !$rootScope.$$phase && $scope.$digest();\n\n      updates.inserted.forEach(function (w) {\n        return elementRoutines.showElement(w);\n      });\n      updates.prepended.forEach(function (w) {\n        return elementRoutines.showElement(w);\n      });\n      return updates;\n    }\n\n    function doAdjust(rid) {\n      if (!rid) {\n        // dismiss pending requests\n        pending = [];\n        rid = ++ridActual;\n      }\n\n      var updates = processUpdates();\n\n      if (isInvalid(rid)) {\n        return;\n      }\n\n      updatePaddings(rid, updates);\n      enqueueFetch(rid);\n\n      if (!pending.length) {\n        adapter.calculateProperties();\n      }\n    }\n\n    function doAdjustAfterFetch(rid) {\n      var updates = processUpdates();\n\n      viewport.onAfterPrepend(updates);\n\n      if (isInvalid(rid)) {\n        return;\n      }\n\n      updatePaddings(rid, updates);\n      onRenderHandlersRunner();\n      enqueueFetch(rid, updates);\n      pending.shift();\n\n      if (pending.length) fetch(rid);else {\n        adapter.loading(false);\n        bindEvents();\n        adapter.calculateProperties();\n      }\n    }\n\n    function fetch(rid) {\n      if (pending[0]) {\n        // scrolling down\n        if (buffer.length && !viewport.shouldLoadBottom()) {\n          doAdjustAfterFetch(rid);\n        } else {\n          fetchNext(function (result) {\n            if (isInvalid(rid)) {\n              return;\n            }\n\n            if (result.length < bufferSize) {\n              buffer.eof = true;\n            }\n\n            if (result.length > 0) {\n              viewport.clipTop();\n              buffer.append(result);\n            }\n\n            doAdjustAfterFetch(rid);\n          });\n        }\n      } else {\n        // scrolling up\n        if (buffer.length && !viewport.shouldLoadTop()) {\n          doAdjustAfterFetch(rid);\n        } else {\n          fetchPrevious(function (result) {\n            if (isInvalid(rid)) {\n              return;\n            }\n\n            if (result.length < bufferSize) {\n              buffer.bof = true;\n              // log 'bof is reached'\n            }\n\n            if (result.length > 0) {\n              if (buffer.length) {\n                viewport.clipBottom();\n              }\n              buffer.prepend(result);\n            }\n\n            doAdjustAfterFetch(rid);\n          });\n        }\n      }\n    }\n\n    function resizeAndScrollHandler(ev) {\n      if ($rootScope.$$phase || adapter.isLoading || adapter.disabled) {\n        return;\n      }\n\n      if (ev.type === 'scroll') {\n        // Don't process scroll event if it was triggered by us setting scrollTop.\n        if (viewport[0].scrollTop === viewport.scrollTopValue) {\n          return false;\n        }\n\n        // Check if we tried to set scrollTop and it failed. If that happens, don't prepend more items based on the stale value\n        // of scrollTop that will be used by shouldLoadTop(). Also, try to set it again.\n        viewport.scrollTopSetFailed = false;\n        if (viewport.scrollTopValue != null) {\n          var curScrollTop = viewport[0].scrollTop;\n          if (Math.abs(curScrollTop - viewport.scrollTopValue) > Math.abs(curScrollTop - viewport.scrollTopBeforeSet)) {\n            viewport.scrollTopSetFailed = true;\n            viewport.scrollTop(curScrollTop - viewport.scrollTopAdjust);\n          }\n        }\n      }\n\n      enqueueFetch(ridActual);\n\n      // we got a real scroll event, so browser is now in charge of scrollTop\n      viewport.scrollTopValue = null;\n\n      if (pending.length) {\n        unbindEvents();\n      } else {\n        adapter.calculateProperties();\n        !$scope.$$phase && $scope.$digest();\n      }\n    }\n\n    function wheelHandler(event) {\n      if (!adapter.disabled) {\n        var scrollTop = viewport[0].scrollTop;\n        var yMax = viewport[0].scrollHeight - viewport[0].clientHeight;\n\n        if (scrollTop === 0 && !buffer.bof || scrollTop === yMax && !buffer.eof) {\n          event.preventDefault();\n        }\n      }\n    }\n  }\n}]);\n\n/***/ }),\n/* 1 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i[\"return\"]) _i[\"return\"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError(\"Invalid attempt to destructure non-iterable instance\"); } }; }();\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n/*!\r\n globals: angular, window\r\n List of used element methods available in JQuery but not in JQuery Lite\r\n element.before(elem)\r\n element.height()\r\n element.outerHeight(true)\r\n element.height(value) = only for Top/Bottom padding elements\r\n element.scrollTop()\r\n element.scrollTop(value)\r\n */\n\nvar JQLiteExtras = function () {\n  function JQLiteExtras() {\n    _classCallCheck(this, JQLiteExtras);\n  }\n\n  _createClass(JQLiteExtras, [{\n    key: 'registerFor',\n    value: function registerFor(element) {\n      var convertToPx = void 0,\n          css = void 0,\n          getStyle = void 0,\n          isWindow = void 0;\n      // angular implementation blows up if elem is the window\n      css = angular.element.prototype.css;\n\n      element.prototype.css = function (name, value) {\n        var self = this;\n        var elem = self[0];\n        if (!(!elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style)) {\n          return css.call(self, name, value);\n        }\n      };\n\n      // as defined in angularjs v1.0.5\n      isWindow = function isWindow(obj) {\n        return obj && obj.document && obj.location && obj.alert && obj.setInterval;\n      };\n\n      function scrollTo(self, direction, value) {\n        var elem = self[0];\n\n        var _top$left$direction = _slicedToArray({\n          top: ['scrollTop', 'pageYOffset', 'scrollLeft'],\n          left: ['scrollLeft', 'pageXOffset', 'scrollTop']\n        }[direction], 3),\n            method = _top$left$direction[0],\n            prop = _top$left$direction[1],\n            preserve = _top$left$direction[2];\n\n        var isValueDefined = typeof value !== 'undefined';\n        if (isWindow(elem)) {\n          if (isValueDefined) {\n            return elem.scrollTo(self[preserve].call(self), value);\n          }\n          return prop in elem ? elem[prop] : elem.document.documentElement[method];\n        } else {\n          if (isValueDefined) {\n            elem[method] = value;\n          }\n          return elem[method];\n        }\n      }\n\n      if (window.getComputedStyle) {\n        getStyle = function getStyle(elem) {\n          return window.getComputedStyle(elem, null);\n        };\n        convertToPx = function convertToPx(elem, value) {\n          return parseFloat(value);\n        };\n      } else {\n        getStyle = function getStyle(elem) {\n          return elem.currentStyle;\n        };\n        convertToPx = function convertToPx(elem, value) {\n          var left = void 0,\n              result = void 0,\n              rs = void 0,\n              rsLeft = void 0,\n              style = void 0;\n          var core_pnum = /[+-]?(?:\\d*\\.|)\\d+(?:[eE][+-]?\\d+|)/.source;\n          var rnumnonpx = new RegExp('^(' + core_pnum + ')(?!px)[a-z%]+$', 'i');\n\n          if (!rnumnonpx.test(value)) {\n            return parseFloat(value);\n          }\n\n          // ported from JQuery\n          style = elem.style;\n          left = style.left;\n          rs = elem.runtimeStyle;\n          rsLeft = rs && rs.left;\n          if (rs) {\n            rs.left = style.left;\n          }\n          // put in the new values to get a computed style out\n          style.left = value;\n          result = style.pixelLeft;\n          style.left = left;\n          if (rsLeft) {\n            rs.left = rsLeft;\n          }\n          return result;\n        };\n      }\n\n      function getMeasurements(elem, measure) {\n        var base = void 0,\n            borderA = void 0,\n            borderB = void 0,\n            computedMarginA = void 0,\n            computedMarginB = void 0,\n            computedStyle = void 0,\n            dirA = void 0,\n            dirB = void 0,\n            marginA = void 0,\n            marginB = void 0,\n            paddingA = void 0,\n            paddingB = void 0;\n\n        if (isWindow(elem)) {\n          base = document.documentElement[{ height: 'clientHeight', width: 'clientWidth' }[measure]];\n\n          return {\n            base: base,\n            padding: 0,\n            border: 0,\n            margin: 0\n          };\n        }\n\n        // Start with offset property\n\n        var _width$height$measure = _slicedToArray({\n          width: [elem.offsetWidth, 'Left', 'Right'],\n          height: [elem.offsetHeight, 'Top', 'Bottom']\n        }[measure], 3);\n\n        base = _width$height$measure[0];\n        dirA = _width$height$measure[1];\n        dirB = _width$height$measure[2];\n\n\n        computedStyle = getStyle(elem);\n        paddingA = convertToPx(elem, computedStyle['padding' + dirA]) || 0;\n        paddingB = convertToPx(elem, computedStyle['padding' + dirB]) || 0;\n        borderA = convertToPx(elem, computedStyle['border' + dirA + 'Width']) || 0;\n        borderB = convertToPx(elem, computedStyle['border' + dirB + 'Width']) || 0;\n        computedMarginA = computedStyle['margin' + dirA];\n        computedMarginB = computedStyle['margin' + dirB];\n\n        // I do not care for width for now, so this hack is irrelevant\n        // if ( !supportsPercentMargin )\n        // computedMarginA = hackPercentMargin( elem, computedStyle, computedMarginA )\n        // computedMarginB = hackPercentMargin( elem, computedStyle, computedMarginB )\n        marginA = convertToPx(elem, computedMarginA) || 0;\n        marginB = convertToPx(elem, computedMarginB) || 0;\n\n        return {\n          base: base,\n          padding: paddingA + paddingB,\n          border: borderA + borderB,\n          margin: marginA + marginB\n        };\n      }\n\n      function getWidthHeight(elem, direction, measure) {\n        var computedStyle = void 0,\n            result = void 0;\n\n        var measurements = getMeasurements(elem, direction);\n\n        if (measurements.base > 0) {\n          return {\n            base: measurements.base - measurements.padding - measurements.border,\n            outer: measurements.base,\n            outerfull: measurements.base + measurements.margin\n          }[measure];\n        }\n\n        // Fall back to computed then uncomputed css if necessary\n        computedStyle = getStyle(elem);\n        result = computedStyle[direction];\n\n        if (result < 0 || result === null) {\n          result = elem.style[direction] || 0;\n        }\n\n        // Normalize \"\", auto, and prepare for extra\n        result = parseFloat(result) || 0;\n\n        return {\n          base: result - measurements.padding - measurements.border,\n          outer: result,\n          outerfull: result + measurements.padding + measurements.border + measurements.margin\n        }[measure];\n      }\n\n      // define missing methods\n      return angular.forEach({\n        before: function before(newElem) {\n          var children, elem, i, j, parent, ref, self;\n          self = this;\n          elem = self[0];\n          parent = self.parent();\n          children = parent.contents();\n          if (children[0] === elem) {\n            return parent.prepend(newElem);\n          } else {\n            for (i = j = 1, ref = children.length - 1; 1 <= ref ? j <= ref : j >= ref; i = 1 <= ref ? ++j : --j) {\n              if (children[i] === elem) {\n                angular.element(children[i - 1]).after(newElem);\n                return;\n              }\n            }\n            throw new Error('invalid DOM structure ' + elem.outerHTML);\n          }\n        },\n        height: function height(value) {\n          var self;\n          self = this;\n          if (typeof value !== 'undefined') {\n            if (angular.isNumber(value)) {\n              value = value + 'px';\n            }\n            return css.call(self, 'height', value);\n          } else {\n            return getWidthHeight(this[0], 'height', 'base');\n          }\n        },\n        outerHeight: function outerHeight(option) {\n          return getWidthHeight(this[0], 'height', option ? 'outerfull' : 'outer');\n        },\n        outerWidth: function outerWidth(option) {\n          return getWidthHeight(this[0], 'width', option ? 'outerfull' : 'outer');\n        },\n\n\n        /*\r\n         The offset setter method is not implemented\r\n         */\n        offset: function offset(value) {\n          var docElem = void 0,\n              win = void 0;\n          var self = this;\n          var box = {\n            top: 0,\n            left: 0\n          };\n          var elem = self[0];\n          var doc = elem && elem.ownerDocument;\n\n          if (arguments.length) {\n            if (value === undefined) {\n              return self;\n            }\n            // TODO: implement setter\n            throw new Error('offset setter method is not implemented');\n          }\n\n          if (!doc) {\n            return;\n          }\n\n          docElem = doc.documentElement;\n\n          // TODO: Make sure it's not a disconnected DOM node\n\n          if (elem.getBoundingClientRect != null) {\n            box = elem.getBoundingClientRect();\n          }\n\n          win = doc.defaultView || doc.parentWindow;\n\n          return {\n            top: box.top + (win.pageYOffset || docElem.scrollTop) - (docElem.clientTop || 0),\n            left: box.left + (win.pageXOffset || docElem.scrollLeft) - (docElem.clientLeft || 0)\n          };\n        },\n        scrollTop: function scrollTop(value) {\n          return scrollTo(this, 'top', value);\n        },\n        scrollLeft: function scrollLeft(value) {\n          return scrollTo(this, 'left', value);\n        }\n      }, function (value, key) {\n        if (!element.prototype[key]) {\n          return element.prototype[key] = value;\n        }\n      });\n    }\n  }]);\n\n  return JQLiteExtras;\n}();\n\nexports.default = JQLiteExtras;\n\n/***/ }),\n/* 2 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nvar hideClassToken = 'ng-ui-scroll-hide';\n\nvar ElementRoutines = function () {\n  _createClass(ElementRoutines, null, [{\n    key: 'addCSSRules',\n    value: function addCSSRules() {\n      var selector = '.' + hideClassToken;\n      var rules = 'display: none';\n      var sheet = document.styleSheets[0];\n      var index = void 0;\n      try {\n        index = sheet.cssRules.length;\n      } catch (err) {\n        index = 0;\n      }\n      if ('insertRule' in sheet) {\n        sheet.insertRule(selector + '{' + rules + '}', index);\n      } else if ('addRule' in sheet) {\n        sheet.addRule(selector, rules, index);\n      }\n    }\n  }]);\n\n  function ElementRoutines($injector, $q) {\n    _classCallCheck(this, ElementRoutines);\n\n    this.$animate = $injector.has && $injector.has('$animate') ? $injector.get('$animate') : null;\n    this.isAngularVersionLessThen1_3 = angular.version.major === 1 && angular.version.minor < 3;\n    this.$q = $q;\n  }\n\n  _createClass(ElementRoutines, [{\n    key: 'hideElement',\n    value: function hideElement(wrapper) {\n      wrapper.element.addClass(hideClassToken);\n    }\n  }, {\n    key: 'showElement',\n    value: function showElement(wrapper) {\n      wrapper.element.removeClass(hideClassToken);\n    }\n  }, {\n    key: 'insertElement',\n    value: function insertElement(newElement, previousElement) {\n      previousElement.after(newElement);\n      return [];\n    }\n  }, {\n    key: 'removeElement',\n    value: function removeElement(wrapper) {\n      wrapper.element.remove();\n      wrapper.scope.$destroy();\n      return [];\n    }\n  }, {\n    key: 'insertElementAnimated',\n    value: function insertElementAnimated(newElement, previousElement) {\n      if (!this.$animate) {\n        return this.insertElement(newElement, previousElement);\n      }\n\n      if (this.isAngularVersionLessThen1_3) {\n        var deferred = this.$q.defer();\n        // no need for parent - previous element is never null\n        this.$animate.enter(newElement, null, previousElement, function () {\n          return deferred.resolve();\n        });\n\n        return [deferred.promise];\n      }\n\n      // no need for parent - previous element is never null\n      return [this.$animate.enter(newElement, null, previousElement)];\n    }\n  }, {\n    key: 'removeElementAnimated',\n    value: function removeElementAnimated(wrapper) {\n      if (!this.$animate) {\n        return this.removeElement(wrapper);\n      }\n\n      if (this.isAngularVersionLessThen1_3) {\n        var deferred = this.$q.defer();\n        this.$animate.leave(wrapper.element, function () {\n          wrapper.scope.$destroy();\n          return deferred.resolve();\n        });\n\n        return [deferred.promise];\n      }\n\n      return [this.$animate.leave(wrapper.element).then(function () {\n        return wrapper.scope.$destroy();\n      })];\n    }\n  }]);\n\n  return ElementRoutines;\n}();\n\nexports.default = ElementRoutines;\n\n/***/ }),\n/* 3 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = ScrollBuffer;\nfunction ScrollBuffer(elementRoutines, bufferSize, startIndex) {\n  var buffer = Object.create(Array.prototype);\n\n  angular.extend(buffer, {\n    size: bufferSize,\n\n    reset: function reset(startIndex) {\n      buffer.remove(0, buffer.length);\n      buffer.eof = false;\n      buffer.bof = false;\n      buffer.first = startIndex;\n      buffer.next = startIndex;\n      buffer.minIndex = startIndex;\n      buffer.maxIndex = startIndex;\n      buffer.minIndexUser = null;\n      buffer.maxIndexUser = null;\n    },\n    append: function append(items) {\n      items.forEach(function (item) {\n        ++buffer.next;\n        buffer.insert('append', item);\n      });\n      buffer.maxIndex = buffer.eof ? buffer.next - 1 : Math.max(buffer.next - 1, buffer.maxIndex);\n    },\n    prepend: function prepend(items) {\n      items.reverse().forEach(function (item) {\n        --buffer.first;\n        buffer.insert('prepend', item);\n      });\n      buffer.minIndex = buffer.bof ? buffer.minIndex = buffer.first : Math.min(buffer.first, buffer.minIndex);\n    },\n\n\n    /**\r\n     * inserts wrapped element in the buffer\r\n     * the first argument is either operation keyword (see below) or a number for operation 'insert'\r\n     * for insert the number is the index for the buffer element the new one have to be inserted after\r\n     * operations: 'append', 'prepend', 'insert', 'remove', 'update', 'none'\r\n     */\n    insert: function insert(operation, item, isTop) {\n      var wrapper = {\n        item: item\n      };\n\n      if (operation % 1 === 0) {\n        // it is an insert\n        wrapper.op = 'insert';\n        buffer.splice(operation, 0, wrapper);\n        if (isTop) {\n          buffer.first--;\n        } else {\n          buffer.next++;\n        }\n      } else {\n        wrapper.op = operation;\n        switch (operation) {\n          case 'append':\n            buffer.push(wrapper);\n            break;\n          case 'prepend':\n            buffer.unshift(wrapper);\n            break;\n        }\n      }\n    },\n\n\n    // removes elements from buffer\n    remove: function remove(arg1, arg2) {\n      if (angular.isNumber(arg1)) {\n        // removes items from arg1 (including) through arg2 (excluding)\n        for (var i = arg1; i < arg2; i++) {\n          elementRoutines.removeElement(buffer[i]);\n        }\n        return buffer.splice(arg1, arg2 - arg1);\n      }\n      // removes single item(wrapper) from the buffer\n      buffer.splice(buffer.indexOf(arg1), 1);\n      if (arg1._op === 'isTop' && buffer.first === this.getAbsMinIndex()) {\n        this.incrementMinIndex();\n      } else {\n        this.decrementMaxIndex();\n      }\n      if (arg1._op === 'isTop') {\n        buffer.first++;\n      } else {\n        buffer.next--;\n      }\n      if (!buffer.length) {\n        buffer.first = 1;\n        buffer.next = 1;\n      }\n\n      return elementRoutines.removeElementAnimated(arg1);\n    },\n    incrementMinIndex: function incrementMinIndex() {\n      if (buffer.minIndexUser !== null) {\n        if (buffer.minIndex > buffer.minIndexUser) {\n          buffer.minIndexUser++;\n          return;\n        }\n        if (buffer.minIndex === buffer.minIndexUser) {\n          buffer.minIndexUser++;\n        }\n      }\n      buffer.minIndex++;\n    },\n    decrementMaxIndex: function decrementMaxIndex() {\n      if (buffer.maxIndexUser !== null && buffer.maxIndex <= buffer.maxIndexUser) {\n        buffer.maxIndexUser--;\n      }\n      buffer.maxIndex--;\n    },\n    getAbsMinIndex: function getAbsMinIndex() {\n      if (buffer.minIndexUser !== null) {\n        return Math.min(buffer.minIndexUser, buffer.minIndex);\n      }\n      return buffer.minIndex;\n    },\n    getAbsMaxIndex: function getAbsMaxIndex() {\n      if (buffer.maxIndexUser !== null) {\n        return Math.max(buffer.maxIndexUser, buffer.maxIndex);\n      }\n      return buffer.maxIndex;\n    },\n    effectiveHeight: function effectiveHeight(elements) {\n      if (!elements.length) {\n        return 0;\n      }\n      var top = Number.MAX_VALUE;\n      var bottom = Number.NEGATIVE_INFINITY;\n      elements.forEach(function (wrapper) {\n        if (wrapper.element[0].offsetParent) {\n          // element style is not display:none\n          top = Math.min(top, wrapper.element.offset().top);\n          bottom = Math.max(bottom, wrapper.element.offset().top + wrapper.element.outerHeight(true));\n        }\n      });\n      return Math.max(0, bottom - top);\n    }\n  });\n\n  buffer.reset(startIndex);\n\n  return buffer;\n}\n\n/***/ }),\n/* 4 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = Viewport;\n\nvar _padding = __webpack_require__(5);\n\nvar _padding2 = _interopRequireDefault(_padding);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction Viewport(elementRoutines, buffer, element, viewportController, $rootScope, padding) {\n  var topPadding = null;\n  var bottomPadding = null;\n  var viewport = viewportController && viewportController.viewport ? viewportController.viewport : angular.element(window);\n  var container = viewportController && viewportController.container ? viewportController.container : undefined;\n  var scope = viewportController && viewportController.scope ? viewportController.scope : $rootScope;\n\n  viewport.css({\n    'overflow-anchor': 'none',\n    'overflow-y': 'auto',\n    'display': 'block'\n  });\n\n  viewport.scrollTopOriginal = viewport.scrollTopOriginal || viewport.scrollTop;\n  viewport.scrollTopBeforeSet = null;\n  viewport.scrollTopValue = null;\n\n  function bufferPadding() {\n    return viewport.outerHeight() * padding; // some extra space to initiate preload\n  }\n\n  angular.extend(viewport, {\n    getScope: function getScope() {\n      return scope;\n    },\n    scrollTop: function scrollTop() {\n      if (typeof arguments[0] !== 'undefined') {\n        viewport.scrollTopBeforeSet = viewport.scrollTop();\n        viewport.scrollTopValue = arguments[0];\n      }\n      return viewport.scrollTopOriginal.apply(viewport, arguments);\n    },\n    createPaddingElements: function createPaddingElements(template) {\n      topPadding = new _padding2.default(template);\n      bottomPadding = new _padding2.default(template);\n      element.before(topPadding.element);\n      element.after(bottomPadding.element);\n      topPadding.height(0);\n      bottomPadding.height(0);\n    },\n    applyContainerStyle: function applyContainerStyle() {\n      if (!container) {\n        return true;\n      }\n      if (container !== viewport) {\n        viewport.css('height', window.getComputedStyle(container[0]).height);\n      }\n      return viewport.height() > 0;\n    },\n    bottomDataPos: function bottomDataPos() {\n      var scrollHeight = viewport[0].scrollHeight;\n      scrollHeight = scrollHeight != null ? scrollHeight : viewport[0].document.documentElement.scrollHeight;\n      return scrollHeight - bottomPadding.height();\n    },\n    topDataPos: function topDataPos() {\n      return topPadding.height();\n    },\n    bottomVisiblePos: function bottomVisiblePos() {\n      return viewport.scrollTop() + viewport.outerHeight();\n    },\n    topVisiblePos: function topVisiblePos() {\n      return viewport.scrollTop();\n    },\n    insertElement: function insertElement(e, sibling) {\n      return elementRoutines.insertElement(e, sibling || topPadding.element);\n    },\n    insertElementAnimated: function insertElementAnimated(e, sibling) {\n      return elementRoutines.insertElementAnimated(e, sibling || topPadding.element);\n    },\n    shouldLoadBottom: function shouldLoadBottom() {\n      return !buffer.eof && viewport.bottomDataPos() < viewport.bottomVisiblePos() + bufferPadding();\n    },\n    clipBottom: function clipBottom() {\n      // clip the invisible items off the bottom\n      var overage = 0;\n      var overageHeight = 0;\n      var itemHeight = 0;\n      var emptySpaceHeight = viewport.bottomDataPos() - viewport.bottomVisiblePos() - bufferPadding();\n\n      for (var i = buffer.length - 1; i >= 0; i--) {\n        itemHeight = buffer[i].element.outerHeight(true);\n        if (overageHeight + itemHeight > emptySpaceHeight) {\n          break;\n        }\n        bottomPadding.cache.add(buffer[i]);\n        overageHeight += itemHeight;\n        overage++;\n      }\n\n      if (overage > 0) {\n        buffer.eof = false;\n        buffer.remove(buffer.length - overage, buffer.length);\n        buffer.next -= overage;\n        viewport.adjustPaddings();\n      }\n    },\n    shouldLoadTop: function shouldLoadTop() {\n      return !buffer.bof && !viewport.scrollTopSetFailed && viewport.topDataPos() > viewport.topVisiblePos() - bufferPadding();\n    },\n    clipTop: function clipTop() {\n      // clip the invisible items off the top\n      var overage = 0;\n      var overageHeight = 0;\n      var itemHeight = 0;\n      var emptySpaceHeight = viewport.topVisiblePos() - viewport.topDataPos() - bufferPadding();\n\n      for (var i = 0; i < buffer.length; i++) {\n        itemHeight = buffer[i].element.outerHeight(true);\n        if (overageHeight + itemHeight > emptySpaceHeight) {\n          break;\n        }\n        topPadding.cache.add(buffer[i]);\n        overageHeight += itemHeight;\n        overage++;\n      }\n\n      if (overage > 0) {\n        // we need to adjust top padding element before items are removed from top\n        // to avoid strange behaviour of scroll bar during remove top items when we are at the very bottom\n        topPadding.height(topPadding.height() + overageHeight);\n        buffer.bof = false;\n        buffer.remove(0, overage);\n        buffer.first += overage;\n      }\n    },\n    adjustPaddings: function adjustPaddings() {\n      if (!buffer.length) {\n        return;\n      }\n\n      // precise heights calculation based on items that are in buffer or that were in buffer once\n      var visibleItemsHeight = buffer.reduce(function (summ, item) {\n        return summ + item.element.outerHeight(true);\n      }, 0);\n\n      var topPaddingHeight = 0,\n          topCount = 0;\n      topPadding.cache.forEach(function (item) {\n        if (item.index < buffer.first) {\n          topPaddingHeight += item.height;\n          topCount++;\n        }\n      });\n\n      var bottomPaddingHeight = 0,\n          bottomCount = 0;\n      bottomPadding.cache.forEach(function (item) {\n        if (item.index >= buffer.next) {\n          bottomPaddingHeight += item.height;\n          bottomCount++;\n        }\n      });\n\n      var totalHeight = visibleItemsHeight + topPaddingHeight + bottomPaddingHeight;\n      var averageItemHeight = totalHeight / (topCount + bottomCount + buffer.length);\n\n      // average heights calculation, items that have never been reached\n      var adjustTopPadding = buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser;\n      var adjustBottomPadding = buffer.maxIndexUser !== null && buffer.maxIndex < buffer.maxIndexUser;\n      var topPaddingHeightAdd = adjustTopPadding ? (buffer.minIndex - buffer.minIndexUser) * averageItemHeight : 0;\n      var bottomPaddingHeightAdd = adjustBottomPadding ? (buffer.maxIndexUser - buffer.maxIndex) * averageItemHeight : 0;\n\n      // paddings combine adjustment\n      topPadding.height(topPaddingHeight + topPaddingHeightAdd);\n      bottomPadding.height(bottomPaddingHeight + bottomPaddingHeightAdd);\n    },\n    onAfterMinIndexSet: function onAfterMinIndexSet(topPaddingHeightOld) {\n      // additional scrollTop adjustment in case of datasource.minIndex external set\n      if (buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser) {\n        var diff = topPadding.height() - topPaddingHeightOld;\n        viewport.scrollTop(viewport.scrollTop() + diff);\n        while ((diff -= viewport.scrollTop()) > 0) {\n          bottomPadding.height(bottomPadding.height() + diff);\n          viewport.scrollTop(viewport.scrollTop() + diff);\n        }\n      }\n    },\n    onAfterPrepend: function onAfterPrepend(updates) {\n      if (!updates.prepended.length) return;\n      var height = buffer.effectiveHeight(updates.prepended);\n      var paddingHeight = topPadding.height() - height;\n      if (paddingHeight >= 0) {\n        topPadding.height(paddingHeight);\n      } else {\n        topPadding.height(0);\n        viewport.scrollTopAdjust = paddingHeight;\n        viewport.scrollTop(viewport.scrollTop() - paddingHeight);\n      }\n    },\n    resetTopPadding: function resetTopPadding() {\n      topPadding.height(0);\n      topPadding.cache.clear();\n    },\n    resetBottomPadding: function resetBottomPadding() {\n      bottomPadding.height(0);\n      bottomPadding.cache.clear();\n    },\n    removeCacheItem: function removeCacheItem(item, isTop) {\n      topPadding.cache.remove(item, isTop);\n      bottomPadding.cache.remove(item, isTop);\n    },\n    removeItem: function removeItem(item) {\n      this.removeCacheItem(item);\n      return buffer.remove(item);\n    }\n  });\n\n  return viewport;\n}\n\n/***/ }),\n/* 5 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n// Can't just extend the Array, due to Babel does not support built-in classes extending\n// This solution was taken from https://stackoverflow.com/questions/46897414/es6-class-extends-array-workaround-for-es5-babel-transpile\nvar CacheProto = function () {\n  function CacheProto() {\n    _classCallCheck(this, CacheProto);\n  }\n\n  _createClass(CacheProto, [{\n    key: 'add',\n    value: function add(item) {\n      for (var i = this.length - 1; i >= 0; i--) {\n        if (this[i].index === item.scope.$index) {\n          this[i].height = item.element.outerHeight();\n          return;\n        }\n      }\n      this.push({\n        index: item.scope.$index,\n        height: item.element.outerHeight()\n      });\n      this.sort(function (a, b) {\n        return a.index < b.index ? -1 : a.index > b.index ? 1 : 0;\n      });\n    }\n  }, {\n    key: 'remove',\n    value: function remove(argument, _isTop) {\n      var index = argument % 1 === 0 ? argument : argument.scope.$index;\n      var isTop = argument % 1 === 0 ? _isTop : argument._op === 'isTop';\n      for (var i = this.length - 1; i >= 0; i--) {\n        if (this[i].index === index) {\n          this.splice(i, 1);\n          break;\n        }\n      }\n      if (!isTop) {\n        for (var _i = this.length - 1; _i >= 0; _i--) {\n          if (this[_i].index > index) {\n            this[_i].index--;\n          }\n        }\n      }\n    }\n  }, {\n    key: 'clear',\n    value: function clear() {\n      this.length = 0;\n    }\n  }]);\n\n  return CacheProto;\n}();\n\nfunction Cache() {\n  var instance = [];\n  instance.push.apply(instance, arguments);\n  Object.setPrototypeOf(instance, Cache.prototype);\n  return instance;\n}\nCache.prototype = Object.create(Array.prototype);\nObject.getOwnPropertyNames(CacheProto.prototype).forEach(function (methodName) {\n  return Cache.prototype[methodName] = CacheProto.prototype[methodName];\n});\n\nfunction generateElement(template) {\n  if (template.nodeType !== Node.ELEMENT_NODE) {\n    throw new Error('ui-scroll directive requires an Element node for templating the view');\n  }\n  var element = void 0;\n  switch (template.tagName.toLowerCase()) {\n    case 'dl':\n      throw new Error('ui-scroll directive does not support <' + template.tagName + '> as a repeating tag: ' + template.outerHTML);\n    case 'tr':\n      var table = angular.element('<table><tr><td><div></div></td></tr></table>');\n      element = table.find('tr');\n      break;\n    case 'li':\n      element = angular.element('<li></li>');\n      break;\n    default:\n      element = angular.element('<div></div>');\n  }\n  return element;\n}\n\nvar Padding = function () {\n  function Padding(template) {\n    _classCallCheck(this, Padding);\n\n    this.element = generateElement(template);\n    this.cache = new Cache();\n  }\n\n  _createClass(Padding, [{\n    key: 'height',\n    value: function height() {\n      return this.element.height.apply(this.element, arguments);\n    }\n  }]);\n\n  return Padding;\n}();\n\nexports.default = Padding;\n\n/***/ }),\n/* 6 */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\n\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nvar Adapter = function () {\n  function Adapter($scope, $parse, $attr, viewport, buffer, doAdjust, reload) {\n    _classCallCheck(this, Adapter);\n\n    this.$parse = $parse;\n    this.$attr = $attr;\n    this.viewport = viewport;\n    this.buffer = buffer;\n\n    this.doAdjust = doAdjust;\n    this.reload = reload;\n\n    this.isLoading = false;\n    this.disabled = false;\n\n    var viewportScope = viewport.getScope();\n    this.startScope = viewportScope.$parent ? viewportScope : $scope;\n\n    this.publicContext = {};\n    this.assignAdapter($attr.adapter);\n    this.generatePublicContext();\n  }\n\n  _createClass(Adapter, [{\n    key: 'assignAdapter',\n    value: function assignAdapter(adapterAttr) {\n      if (!adapterAttr || !(adapterAttr = adapterAttr.replace(/^\\s+|\\s+$/gm, ''))) {\n        return;\n      }\n      var adapterOnScope = void 0;\n\n      try {\n        this.$parse(adapterAttr).assign(this.startScope, {});\n        adapterOnScope = this.$parse(adapterAttr)(this.startScope);\n      } catch (error) {\n        error.message = 'Angular ui-scroll Adapter assignment exception.\\n' + ('Can\\'t parse \"' + adapterAttr + '\" expression.\\n') + error.message;\n        throw error;\n      }\n\n      angular.extend(adapterOnScope, this.publicContext);\n      this.publicContext = adapterOnScope;\n    }\n  }, {\n    key: 'generatePublicContext',\n    value: function generatePublicContext() {\n      var _this = this;\n\n      // these methods will be accessible out of ui-scroll via user defined adapter\n      var publicMethods = ['reload', 'applyUpdates', 'append', 'prepend', 'isBOF', 'isEOF', 'isEmpty', 'resetScrollTopCorrection'];\n      for (var i = publicMethods.length - 1; i >= 0; i--) {\n        this.publicContext[publicMethods[i]] = this[publicMethods[i]].bind(this);\n      }\n\n      // these read-only props will be accessible out of ui-scroll via user defined adapter\n      var publicProps = ['isLoading', 'topVisible', 'topVisibleElement', 'topVisibleScope', 'bottomVisible', 'bottomVisibleElement', 'bottomVisibleScope'];\n\n      var _loop = function _loop(_i) {\n        var property = void 0,\n            attr = _this.$attr[publicProps[_i]];\n        Object.defineProperty(_this, publicProps[_i], {\n          get: function get() {\n            return property;\n          },\n          set: function set(value) {\n            property = value;\n            _this.publicContext[publicProps[_i]] = value;\n            if (attr) {\n              _this.$parse(attr).assign(_this.startScope, value);\n            }\n          }\n        });\n      };\n\n      for (var _i = publicProps.length - 1; _i >= 0; _i--) {\n        _loop(_i);\n      }\n\n      // non-read-only public property\n      Object.defineProperty(this.publicContext, 'disabled', {\n        get: function get() {\n          return _this.disabled;\n        },\n        set: function set(value) {\n          return !(_this.disabled = value) ? _this.doAdjust() : null;\n        }\n      });\n    }\n  }, {\n    key: 'loading',\n    value: function loading(value) {\n      this.isLoading = value;\n    }\n  }, {\n    key: 'isBOF',\n    value: function isBOF() {\n      return this.buffer.bof;\n    }\n  }, {\n    key: 'isEOF',\n    value: function isEOF() {\n      return this.buffer.eof;\n    }\n  }, {\n    key: 'isEmpty',\n    value: function isEmpty() {\n      return !this.buffer.length;\n    }\n  }, {\n    key: 'resetScrollTopCorrection',\n    value: function resetScrollTopCorrection() {\n      // is needed to scroll at negative area programmatically (e.g. tests)\n      this.viewport.scrollTopValue = null;\n    }\n  }, {\n    key: 'append',\n    value: function append(newItems) {\n      this.buffer.append(newItems);\n      this.doAdjust();\n      this.viewport.clipTop();\n      this.viewport.clipBottom();\n    }\n  }, {\n    key: 'prepend',\n    value: function prepend(newItems) {\n      this.buffer.prepend(newItems);\n      this.doAdjust();\n      this.viewport.clipTop();\n      this.viewport.clipBottom();\n    }\n  }, {\n    key: 'applyUpdates',\n    value: function applyUpdates(arg1, arg2) {\n      if (typeof arg1 === 'function') {\n        this.applyUpdatesFunc(arg1);\n      } else {\n        this.applyUpdatesIndex(arg1, arg2);\n      }\n      this.doAdjust();\n    }\n  }, {\n    key: 'applyUpdatesFunc',\n    value: function applyUpdatesFunc(cb) {\n      var _this2 = this;\n\n      this.buffer.slice(0).forEach(function (wrapper) {\n        // we need to do it on the buffer clone, because buffer content\n        // may change as we iterate through\n        _this2.applyUpdate(wrapper, cb(wrapper.item, wrapper.scope, wrapper.element));\n      });\n    }\n  }, {\n    key: 'applyUpdatesIndex',\n    value: function applyUpdatesIndex(index, newItems) {\n      if (index % 1 !== 0) {\n        throw new Error('applyUpdates - ' + index + ' is not a valid index (should be an integer)');\n      }\n      var _index = index - this.buffer.first;\n\n      // apply updates only within buffer\n      if (_index >= 0 && _index < this.buffer.length) {\n        this.applyUpdate(this.buffer[_index], newItems);\n      }\n      // out-of-buffer case: deletion may affect Paddings\n      else if (index >= this.buffer.getAbsMinIndex() && index <= this.buffer.getAbsMaxIndex()) {\n          if (angular.isArray(newItems) && !newItems.length) {\n            this.viewport.removeCacheItem(index, index === this.buffer.minIndex);\n            if (index === this.buffer.getAbsMinIndex()) {\n              this.buffer.incrementMinIndex();\n            } else {\n              this.buffer.decrementMaxIndex();\n            }\n          }\n        }\n    }\n  }, {\n    key: 'applyUpdate',\n    value: function applyUpdate(wrapper, newItems) {\n      var _this3 = this;\n\n      if (!angular.isArray(newItems)) {\n        return;\n      }\n      var position = this.buffer.indexOf(wrapper);\n      if (!newItems.reverse().some(function (newItem) {\n        return newItem === wrapper.item;\n      })) {\n        wrapper.op = 'remove';\n        if (position === 0 && !newItems.length) {\n          wrapper._op = 'isTop'; // to catch \"first\" edge case on remove\n        }\n      }\n      newItems.forEach(function (newItem) {\n        if (newItem === wrapper.item) {\n          position--;\n        } else {\n          // 3 parameter (isTop) is to catch \"first\" edge case on insert\n          _this3.buffer.insert(position + 1, newItem, position === -1);\n        }\n      });\n    }\n  }, {\n    key: 'calculateProperties',\n    value: function calculateProperties() {\n      var rowTop = null,\n          topHeight = 0;\n      var topDone = false,\n          bottomDone = false;\n      var length = this.buffer.length;\n\n      for (var i = 0; i < length; i++) {\n        var item = this.buffer[i];\n        var itemTop = item.element.offset().top;\n\n        if (rowTop !== itemTop) {\n          // a new row condition\n          var itemHeight = item.element.outerHeight(true);\n          var top = this.viewport.topDataPos() + topHeight + itemHeight;\n\n          if (!topDone && top > this.viewport.topVisiblePos()) {\n            topDone = true;\n            this['topVisible'] = item.item;\n            this['topVisibleElement'] = item.element;\n            this['topVisibleScope'] = item.scope;\n          }\n          if (!bottomDone && (top >= this.viewport.bottomVisiblePos() || i === length - 1 && this.isEOF())) {\n            bottomDone = true;\n            this['bottomVisible'] = item.item;\n            this['bottomVisibleElement'] = item.element;\n            this['bottomVisibleScope'] = item.scope;\n          }\n          topHeight += itemHeight;\n        }\n        rowTop = itemTop;\n\n        if (topDone && bottomDone) {\n          break;\n        }\n      }\n    }\n  }]);\n\n  return Adapter;\n}();\n\nexports.default = Adapter;\n\n/***/ })\n/******/ ]);\n\n\n// WEBPACK FOOTER //\n// ui-scroll.min.js"," \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, {\n \t\t\t\tconfigurable: false,\n \t\t\t\tenumerable: true,\n \t\t\t\tget: getter\n \t\t\t});\n \t\t}\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 0);\n\n\n\n// WEBPACK FOOTER //\n// webpack/bootstrap 2386088bf7ce5bf5d4af","import JQLiteExtras from './modules/jqLiteExtras';\nimport ElementRoutines from './modules/elementRoutines.js';\nimport ScrollBuffer from './modules/buffer.js';\nimport Viewport from './modules/viewport.js';\nimport Adapter from './modules/adapter.js';\n\nangular.module('ui.scroll', [])\n\n  .constant('JQLiteExtras', JQLiteExtras)\n  .run(['JQLiteExtras', (JQLiteExtras) => {\n    !window.jQuery ? (new JQLiteExtras()).registerFor(angular.element) : null;\n    ElementRoutines.addCSSRules();\n  }])\n\n  .directive('uiScrollViewport', function () {\n    return {\n      restrict: 'A',\n      controller: [\n        '$scope',\n        '$element',\n        function (scope, element) {\n          this.container = element;\n          this.viewport = element;\n          this.scope = scope;\n\n          angular.forEach(element.children(), child => {\n            if (child.tagName.toLowerCase() === 'tbody') {\n              this.viewport = angular.element(child);\n            }\n          });\n\n          return this;\n        }\n      ]\n    };\n  })\n\n  .directive('uiScroll', [\n    '$log',\n    '$injector',\n    '$rootScope',\n    '$timeout',\n    '$interval',\n    '$q',\n    '$parse',\n    function (console, $injector, $rootScope, $timeout, $interval, $q, $parse) {\n\n      return {\n        require: ['?^uiScrollViewport'],\n        restrict: 'A',\n        transclude: 'element',\n        priority: 1000,\n        terminal: true,\n        link: link\n      };\n\n      function link($scope, element, $attr, controllers, linker) {\n        const match = $attr.uiScroll.match(/^\\s*(\\w+)\\s+in\\s+([(\\w|\\$)\\.]+)\\s*$/);\n        if (!match) {\n          throw new Error('Expected uiScroll in form of \\'_item_ in _datasource_\\' but got \\'' + $attr.uiScroll + '\\'');\n        }\n\n        function parseNumericAttr(value, defaultValue) {\n          const result = $parse(value)($scope);\n          return isNaN(result) ? defaultValue : result;\n        }\n\n        const BUFFER_MIN = 3;\n        const BUFFER_DEFAULT = 10;\n        const PADDING_MIN = 0.01;\n        const PADDING_DEFAULT = 0.5;\n        const MAX_VIEWPORT_DELAY = 500;\n        const VIEWPORT_POLLING_INTERVAL = 50;\n\n        let datasource = null;\n        const itemName = match[1];\n        const datasourceName = match[2];\n        const viewportController = controllers[0];\n        const bufferSize = Math.max(BUFFER_MIN, parseNumericAttr($attr.bufferSize, BUFFER_DEFAULT));\n        const padding = Math.max(PADDING_MIN, parseNumericAttr($attr.padding, PADDING_DEFAULT));\n        let startIndex = parseNumericAttr($attr.startIndex, 1);\n        let ridActual = 0; // current data revision id\n        let pending = [];\n\n        const elementRoutines = new ElementRoutines($injector, $q);\n        const buffer = new ScrollBuffer(elementRoutines, bufferSize, startIndex);\n        const viewport = new Viewport(elementRoutines, buffer, element, viewportController, $rootScope, padding);\n        const adapter = new Adapter($scope, $parse, $attr, viewport, buffer, doAdjust, reload);\n\n        if (viewportController) {\n          viewportController.adapter = adapter;\n        }\n\n        const isDatasourceValid = () =>\n          Object.prototype.toString.call(datasource) === '[object Object]' && typeof datasource.get === 'function';\n\n        datasource = $parse(datasourceName)($scope); // try to get datasource on scope\n        if (!isDatasourceValid()) {\n          datasource = $injector.get(datasourceName); // try to inject datasource as service\n          if (!isDatasourceValid()) {\n            throw new Error(datasourceName + ' is not a valid datasource');\n          }\n        }\n\n        let onRenderHandlers = [];\n        function onRenderHandlersRunner() {\n          onRenderHandlers.forEach(handler => handler.run());\n          onRenderHandlers = [];\n        }\n        function persistDatasourceIndex(datasource, propName) {\n          let getter;\n          // need to postpone min/maxIndexUser processing if the view is empty\n          if(angular.isNumber(datasource[propName])) {\n            getter = datasource[propName];\n            if(angular.isNumber(getter)) {\n              onRenderHandlers = onRenderHandlers.filter(handler => handler.id !== propName);\n              onRenderHandlers.push({\n                id: propName,\n                run: () => datasource[propName] = getter\n              });\n            }\n          }\n        }\n\n        function defineDatasourceIndex(datasource, propName, propUserName) {\n          const descriptor = Object.getOwnPropertyDescriptor(datasource, propName);\n          if (descriptor && (descriptor.set || descriptor.get)) {\n            return;\n          }\n          let getter;\n          persistDatasourceIndex(datasource, propName);\n          Object.defineProperty(datasource, propName, {\n            set: (value) => {\n              getter = value;\n              if(pending.length && !buffer.length) {\n                persistDatasourceIndex(datasource, propName);\n                return;\n              }\n              buffer[propUserName] = value;\n              const topPaddingHeightOld = viewport.topDataPos();\n              viewport.adjustPaddings();\n              if (propName === 'minIndex') {\n                viewport.onAfterMinIndexSet(topPaddingHeightOld);\n              }\n            },\n            get: () => getter\n          });\n        }\n\n        defineDatasourceIndex(datasource, 'minIndex', 'minIndexUser');\n        defineDatasourceIndex(datasource, 'maxIndex', 'maxIndexUser');\n\n        const fetchNext = (datasource.get.length !== 2) ?\n          (success) => datasource.get(buffer.next, bufferSize, success) :\n          (success) => {\n            datasource.get({\n              index: buffer.next,\n              append: buffer.length ? buffer[buffer.length - 1].item : void 0,\n              count: bufferSize\n            }, success);\n          };\n\n        const fetchPrevious = (datasource.get.length !== 2) ?\n          (success) => datasource.get(buffer.first - bufferSize, bufferSize, success) :\n          (success) => {\n            datasource.get({\n              index: buffer.first - bufferSize,\n              prepend: buffer.length ? buffer[0].item : void 0,\n              count: bufferSize\n            }, success);\n          };\n\n        const initialize = () => {\n          let tryCount = 0;\n          if(!viewport.applyContainerStyle()) {\n            const timer = $interval(() => {\n              tryCount++;\n              if(viewport.applyContainerStyle()) {\n                $interval.cancel(timer);\n                doAdjust();\n              }\n              if(tryCount * VIEWPORT_POLLING_INTERVAL >= MAX_VIEWPORT_DELAY) {\n                $interval.cancel(timer);\n                throw Error(`ui-scroll directive requires a viewport with non-zero height in ${MAX_VIEWPORT_DELAY}ms`);\n              }\n            }, VIEWPORT_POLLING_INTERVAL);\n          }\n          else {\n            doAdjust();\n          }\n        };\n\n        /**\n         * Build padding elements\n         *\n         * Calling linker is the only way I found to get access to the tag name of the template\n         * to prevent the directive scope from pollution a new scope is created and destroyed\n         * right after the builder creation is completed\n         */\n        linker((clone, scope) => {\n          viewport.createPaddingElements(clone[0]);\n          // we do not include the clone in the DOM. It means that the nested directives will not\n          // be able to reach the parent directives, but in this case it is intentional because we\n          // created the clone to access the template tag name\n          scope.$destroy();\n          clone.remove();\n        });\n\n        $scope.$on('$destroy', () => {\n          unbindEvents();\n          viewport.unbind('mousewheel', wheelHandler);\n        });\n\n        viewport.bind('mousewheel', wheelHandler);\n\n        initialize();\n\n        /* Private function definitions */\n\n        function isInvalid(rid) {\n          return (rid && rid !== ridActual) || $scope.$$destroyed;\n        }\n\n        function bindEvents() {\n          viewport.bind('resize', resizeAndScrollHandler);\n          viewport.bind('scroll', resizeAndScrollHandler);\n        }\n\n        function unbindEvents() {\n          viewport.unbind('resize', resizeAndScrollHandler);\n          viewport.unbind('scroll', resizeAndScrollHandler);\n        }\n\n        function reload() {\n          viewport.resetTopPadding();\n          viewport.resetBottomPadding();\n          if (arguments.length) {\n            startIndex = arguments[0];\n          }\n          buffer.reset(startIndex);\n          persistDatasourceIndex(datasource, 'minIndex');\n          persistDatasourceIndex(datasource, 'maxIndex');\n          doAdjust();\n        }\n\n        function isElementVisible(wrapper) {\n          return wrapper.element.height() && wrapper.element[0].offsetParent;\n        }\n\n        function visibilityWatcher(wrapper) {\n          if (isElementVisible(wrapper)) {\n            buffer.forEach((item) => {\n              if (typeof item.unregisterVisibilityWatcher === 'function') {\n                item.unregisterVisibilityWatcher();\n                delete item.unregisterVisibilityWatcher;\n              }\n            });\n            if (!pending.length) {\n              $timeout(() => doAdjust());\n            }\n          }\n        }\n\n        function insertWrapperContent(wrapper, insertAfter) {\n          createElement(wrapper, insertAfter, viewport.insertElement);\n          if (!isElementVisible(wrapper)) {\n            wrapper.unregisterVisibilityWatcher = wrapper.scope.$watch(() => visibilityWatcher(wrapper));\n          }\n          elementRoutines.hideElement(wrapper); // hide inserted elements before data binding\n        }\n\n        function createElement(wrapper, insertAfter, insertElement) {\n          let promises = null;\n          const sibling = (insertAfter > 0) ? buffer[insertAfter - 1].element : undefined;\n          linker((clone, scope) => {\n            promises = insertElement(clone, sibling);\n            wrapper.element = clone;\n            wrapper.scope = scope;\n            scope[itemName] = wrapper.item;\n          });\n          // ui-scroll-grid apply\n          if (adapter.transform) {\n            const tdInitializer = wrapper.scope.uiScrollTdInitializer;\n            if (tdInitializer && tdInitializer.linking) {\n              adapter.transform(wrapper.scope, wrapper.element);\n            } else {\n              wrapper.scope.uiScrollTdInitializer = {\n                onLink: () => adapter.transform(wrapper.scope, wrapper.element),\n                scope: wrapper.scope\n              };\n            }\n          }\n          return promises;\n        }\n\n        function updateDOM() {\n          let promises = [];\n          const toBePrepended = [];\n          const toBeRemoved = [];\n          const inserted = [];\n\n          buffer.forEach((wrapper, i) => {\n            switch (wrapper.op) {\n              case 'prepend':\n                toBePrepended.unshift(wrapper);\n                break;\n              case 'append':\n                insertWrapperContent(wrapper, i);\n                wrapper.op = 'none';\n                inserted.push(wrapper);\n                break;\n              case 'insert':\n                promises = promises.concat(createElement(wrapper, i, viewport.insertElementAnimated));\n                wrapper.op = 'none';\n                inserted.push(wrapper);\n                break;\n              case 'remove':\n                toBeRemoved.push(wrapper);\n            }\n          });\n\n          toBeRemoved.forEach((wrapper) => promises = promises.concat(viewport.removeItem(wrapper)));\n\n          if (toBePrepended.length)\n            toBePrepended.forEach((wrapper) => {\n              insertWrapperContent(wrapper);\n              wrapper.op = 'none';\n            });\n\n          buffer.forEach((item, i) => item.scope.$index = buffer.first + i);\n\n          return {\n            prepended: toBePrepended,\n            removed: toBeRemoved,\n            inserted: inserted,\n            animated: promises\n          };\n\n        }\n\n        function updatePaddings(rid, updates) {\n          // schedule another doAdjust after animation completion\n          if (updates.animated.length) {\n            $q.all(updates.animated).then(() => {\n              viewport.adjustPaddings();\n              doAdjust(rid);\n            });\n          } else {\n            viewport.adjustPaddings();\n          }\n        }\n\n        function enqueueFetch(rid, updates) {\n          if (viewport.shouldLoadBottom()) {\n            if (!updates || buffer.effectiveHeight(updates.inserted) > 0) {\n              // this means that at least one item appended in the last batch has height > 0\n              if (pending.push(true) === 1) {\n                adapter.loading(true);\n                fetch(rid);\n              }\n            }\n          } else if (viewport.shouldLoadTop()) {\n            if ((!updates || buffer.effectiveHeight(updates.prepended) > 0) || pending[0]) {\n              // this means that at least one item appended in the last batch has height > 0\n              // pending[0] = true means that previous fetch was appending. We need to force at least one prepend\n              // BTW there will always be at least 1 element in the pending array because bottom is fetched first\n              if (pending.push(false) === 1) {\n                adapter.loading(true);\n                fetch(rid);\n              }\n            }\n          }\n        }\n\n        function processUpdates() {\n          const updates = updateDOM();\n\n          // We need the item bindings to be processed before we can do adjustments\n          !$scope.$$phase && !$rootScope.$$phase && $scope.$digest();\n\n          updates.inserted.forEach(w => elementRoutines.showElement(w));\n          updates.prepended.forEach(w => elementRoutines.showElement(w));\n          return updates;\n        }\n\n        function doAdjust(rid) {\n          if (!rid) { // dismiss pending requests\n            pending = [];\n            rid = ++ridActual;\n          }\n\n          const updates = processUpdates();\n\n          if (isInvalid(rid)) {\n            return;\n          }\n\n          updatePaddings(rid, updates);\n          enqueueFetch(rid);\n\n          if (!pending.length) {\n            adapter.calculateProperties();\n          }\n        }\n\n        function doAdjustAfterFetch(rid) {\n          const updates = processUpdates();\n\n          viewport.onAfterPrepend(updates);\n\n          if (isInvalid(rid)) {\n            return;\n          }\n\n          updatePaddings(rid, updates);\n          onRenderHandlersRunner();\n          enqueueFetch(rid, updates);\n          pending.shift();\n\n          if (pending.length)\n            fetch(rid);\n          else {\n            adapter.loading(false);\n            bindEvents();\n            adapter.calculateProperties();\n          }\n        }\n\n        function fetch(rid) {\n          if (pending[0]) {// scrolling down\n            if (buffer.length && !viewport.shouldLoadBottom()) {\n              doAdjustAfterFetch(rid);\n            } else {\n              fetchNext((result) => {\n                if (isInvalid(rid)) {\n                  return;\n                }\n\n                if (result.length < bufferSize) {\n                  buffer.eof = true;\n                }\n\n                if (result.length > 0) {\n                  viewport.clipTop();\n                  buffer.append(result);\n                }\n\n                doAdjustAfterFetch(rid);\n              });\n            }\n          } else {  // scrolling up\n            if (buffer.length && !viewport.shouldLoadTop()) {\n              doAdjustAfterFetch(rid);\n            } else {\n              fetchPrevious((result) => {\n                if (isInvalid(rid)) {\n                  return;\n                }\n\n                if (result.length < bufferSize) {\n                  buffer.bof = true;\n                  // log 'bof is reached'\n                }\n\n                if (result.length > 0) {\n                  if (buffer.length) {\n                    viewport.clipBottom();\n                  }\n                  buffer.prepend(result);\n                }\n\n                doAdjustAfterFetch(rid);\n              });\n            }\n          }\n        }\n\n        function resizeAndScrollHandler(ev) {\n          if ($rootScope.$$phase || adapter.isLoading || adapter.disabled) {\n            return;\n          }\n\n          if (ev.type === 'scroll') {\n            // Don't process scroll event if it was triggered by us setting scrollTop.\n            if (viewport[0].scrollTop === viewport.scrollTopValue) {\n              return false;\n            }\n\n            // Check if we tried to set scrollTop and it failed. If that happens, don't prepend more items based on the stale value\n            // of scrollTop that will be used by shouldLoadTop(). Also, try to set it again.\n            viewport.scrollTopSetFailed = false;\n            if (viewport.scrollTopValue != null) {\n              const curScrollTop = viewport[0].scrollTop;\n              if (Math.abs(curScrollTop - viewport.scrollTopValue) > Math.abs(curScrollTop - viewport.scrollTopBeforeSet)) {\n                viewport.scrollTopSetFailed = true;\n                viewport.scrollTop(curScrollTop - viewport.scrollTopAdjust);\n              }\n            }\n          }\n\n          enqueueFetch(ridActual);\n\n          // we got a real scroll event, so browser is now in charge of scrollTop\n          viewport.scrollTopValue = null;\n\n          if (pending.length) {\n            unbindEvents();\n          } else {\n            adapter.calculateProperties();\n            !$scope.$$phase && $scope.$digest();\n          }\n        }\n\n        function wheelHandler(event) {\n          if (!adapter.disabled) {\n            const scrollTop = viewport[0].scrollTop;\n            const yMax = viewport[0].scrollHeight - viewport[0].clientHeight;\n\n            if ((scrollTop === 0 && !buffer.bof) || (scrollTop === yMax && !buffer.eof)) {\n              event.preventDefault();\n            }\n          }\n        }\n      }\n\n    }\n  ]);\n\n\n\n// WEBPACK FOOTER //\n// ./src/ui-scroll.js","/*!\r\n globals: angular, window\r\n List of used element methods available in JQuery but not in JQuery Lite\r\n element.before(elem)\r\n element.height()\r\n element.outerHeight(true)\r\n element.height(value) = only for Top/Bottom padding elements\r\n element.scrollTop()\r\n element.scrollTop(value)\r\n */\r\n\r\nexport default class JQLiteExtras {\r\n\r\n  registerFor(element) {\r\n    let convertToPx, css, getStyle, isWindow;\r\n    // angular implementation blows up if elem is the window\r\n    css = angular.element.prototype.css;\r\n\r\n    element.prototype.css = function (name, value) {\r\n      let self = this;\r\n      let elem = self[0];\r\n      if (!(!elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style)) {\r\n        return css.call(self, name, value);\r\n      }\r\n    };\r\n\r\n    // as defined in angularjs v1.0.5\r\n    isWindow = (obj) => obj && obj.document && obj.location && obj.alert && obj.setInterval;\r\n\r\n    function scrollTo(self, direction, value) {\r\n      let elem = self[0];\r\n      let [method, prop, preserve] = {\r\n        top: [\r\n          'scrollTop',\r\n          'pageYOffset',\r\n          'scrollLeft'\r\n        ],\r\n        left: [\r\n          'scrollLeft',\r\n          'pageXOffset',\r\n          'scrollTop'\r\n        ]\r\n      }[direction];\r\n\r\n      const isValueDefined = typeof value !== 'undefined';\r\n      if (isWindow(elem)) {\r\n        if (isValueDefined) {\r\n          return elem.scrollTo(self[preserve].call(self), value);\r\n        }\r\n        return (prop in elem) ? elem[prop] : elem.document.documentElement[method];\r\n      } else {\r\n        if (isValueDefined) {\r\n          elem[method] = value;\r\n        }\r\n        return elem[method];\r\n      }\r\n    }\r\n\r\n    if (window.getComputedStyle) {\r\n      getStyle = (elem) => window.getComputedStyle(elem, null);\r\n      convertToPx = (elem, value) => parseFloat(value);\r\n    } else {\r\n      getStyle = (elem) => elem.currentStyle;\r\n      convertToPx = (elem, value) => {\r\n        let left, result, rs, rsLeft, style;\r\n        let core_pnum = /[+-]?(?:\\d*\\.|)\\d+(?:[eE][+-]?\\d+|)/.source;\r\n        let rnumnonpx = new RegExp('^(' + core_pnum + ')(?!px)[a-z%]+$', 'i');\r\n\r\n        if (!rnumnonpx.test(value)) {\r\n          return parseFloat(value);\r\n        }\r\n\r\n        // ported from JQuery\r\n        style = elem.style;\r\n        left = style.left;\r\n        rs = elem.runtimeStyle;\r\n        rsLeft = rs && rs.left;\r\n        if (rs) {\r\n          rs.left = style.left;\r\n        }\r\n        // put in the new values to get a computed style out\r\n        style.left = value;\r\n        result = style.pixelLeft;\r\n        style.left = left;\r\n        if (rsLeft) {\r\n          rs.left = rsLeft;\r\n        }\r\n        return result;\r\n      };\r\n    }\r\n\r\n    function getMeasurements(elem, measure) {\r\n      let base, borderA, borderB, computedMarginA, computedMarginB, computedStyle, dirA, dirB, marginA, marginB, paddingA, paddingB;\r\n\r\n      if (isWindow(elem)) {\r\n        base = document.documentElement[{height: 'clientHeight', width: 'clientWidth'}[measure]];\r\n\r\n        return {\r\n          base: base,\r\n          padding: 0,\r\n          border: 0,\r\n          margin: 0\r\n        };\r\n      }\r\n\r\n      // Start with offset property\r\n      [\r\n        base,\r\n        dirA,\r\n        dirB\r\n      ] = {\r\n        width: [\r\n          elem.offsetWidth,\r\n          'Left',\r\n          'Right'\r\n        ],\r\n        height: [\r\n          elem.offsetHeight,\r\n          'Top',\r\n          'Bottom'\r\n        ]\r\n      }[measure];\r\n\r\n      computedStyle = getStyle(elem);\r\n      paddingA = convertToPx(elem, computedStyle['padding' + dirA]) || 0;\r\n      paddingB = convertToPx(elem, computedStyle['padding' + dirB]) || 0;\r\n      borderA = convertToPx(elem, computedStyle['border' + dirA + 'Width']) || 0;\r\n      borderB = convertToPx(elem, computedStyle['border' + dirB + 'Width']) || 0;\r\n      computedMarginA = computedStyle['margin' + dirA];\r\n      computedMarginB = computedStyle['margin' + dirB];\r\n\r\n      // I do not care for width for now, so this hack is irrelevant\r\n      // if ( !supportsPercentMargin )\r\n      // computedMarginA = hackPercentMargin( elem, computedStyle, computedMarginA )\r\n      // computedMarginB = hackPercentMargin( elem, computedStyle, computedMarginB )\r\n      marginA = convertToPx(elem, computedMarginA) || 0;\r\n      marginB = convertToPx(elem, computedMarginB) || 0;\r\n\r\n      return {\r\n        base: base,\r\n        padding: paddingA + paddingB,\r\n        border: borderA + borderB,\r\n        margin: marginA + marginB\r\n      };\r\n    }\r\n\r\n    function getWidthHeight(elem, direction, measure) {\r\n      let computedStyle, result;\r\n\r\n      let measurements = getMeasurements(elem, direction);\r\n\r\n      if (measurements.base > 0) {\r\n        return {\r\n          base: measurements.base - measurements.padding - measurements.border,\r\n          outer: measurements.base,\r\n          outerfull: measurements.base + measurements.margin\r\n        }[measure];\r\n      }\r\n\r\n      // Fall back to computed then uncomputed css if necessary\r\n      computedStyle = getStyle(elem);\r\n      result = computedStyle[direction];\r\n\r\n      if (result < 0 || result === null) {\r\n        result = elem.style[direction] || 0;\r\n      }\r\n\r\n      // Normalize \"\", auto, and prepare for extra\r\n      result = parseFloat(result) || 0;\r\n\r\n      return {\r\n        base: result - measurements.padding - measurements.border,\r\n        outer: result,\r\n        outerfull: result + measurements.padding + measurements.border + measurements.margin\r\n      }[measure];\r\n    }\r\n\r\n    // define missing methods\r\n    return angular.forEach({\r\n      before(newElem) {\r\n        var children, elem, i, j, parent, ref, self;\r\n        self = this;\r\n        elem = self[0];\r\n        parent = self.parent();\r\n        children = parent.contents();\r\n        if (children[0] === elem) {\r\n          return parent.prepend(newElem);\r\n        } else {\r\n          for (i = j = 1, ref = children.length - 1; 1 <= ref ? j <= ref : j >= ref; i = 1 <= ref ? ++j : --j) {\r\n            if (children[i] === elem) {\r\n              angular.element(children[i - 1]).after(newElem);\r\n              return;\r\n            }\r\n          }\r\n          throw new Error('invalid DOM structure ' + elem.outerHTML);\r\n        }\r\n      },\r\n      height (value){\r\n        var self;\r\n        self = this;\r\n        if (typeof value !== 'undefined') {\r\n          if (angular.isNumber(value)) {\r\n            value = value + 'px';\r\n          }\r\n          return css.call(self, 'height', value);\r\n        } else {\r\n          return getWidthHeight(this[0], 'height', 'base');\r\n        }\r\n      },\r\n      outerHeight(option) {\r\n        return getWidthHeight(this[0], 'height', option ? 'outerfull' : 'outer');\r\n      },\r\n      outerWidth(option) {\r\n        return getWidthHeight(this[0], 'width', option ? 'outerfull' : 'outer');\r\n      },\r\n\r\n      /*\r\n       The offset setter method is not implemented\r\n       */\r\n      offset(value) {\r\n        let docElem, win;\r\n        let self = this;\r\n        let box = {\r\n          top: 0,\r\n          left: 0\r\n        };\r\n        let elem = self[0];\r\n        let doc = elem && elem.ownerDocument;\r\n\r\n        if (arguments.length) {\r\n          if (value === undefined) {\r\n            return self;\r\n          }\r\n          // TODO: implement setter\r\n          throw new Error('offset setter method is not implemented');\r\n        }\r\n\r\n        if (!doc) {\r\n          return;\r\n        }\r\n\r\n        docElem = doc.documentElement;\r\n\r\n        // TODO: Make sure it's not a disconnected DOM node\r\n\r\n        if (elem.getBoundingClientRect != null) {\r\n          box = elem.getBoundingClientRect();\r\n        }\r\n\r\n        win = doc.defaultView || doc.parentWindow;\r\n\r\n        return {\r\n          top: box.top + (win.pageYOffset || docElem.scrollTop) - (docElem.clientTop || 0),\r\n          left: box.left + (win.pageXOffset || docElem.scrollLeft) - (docElem.clientLeft || 0)\r\n        };\r\n      },\r\n      scrollTop(value) {\r\n        return scrollTo(this, 'top', value);\r\n      },\r\n      scrollLeft(value) {\r\n        return scrollTo(this, 'left', value);\r\n      }\r\n    }, (value, key) => {\r\n      if (!element.prototype[key]) {\r\n        return element.prototype[key] = value;\r\n      }\r\n    });\r\n  }\r\n\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/jqLiteExtras.js","const hideClassToken = 'ng-ui-scroll-hide';\r\n\r\nexport default class ElementRoutines {\r\n\r\n  static addCSSRules() {\r\n    const selector = '.' + hideClassToken;\r\n    const rules = 'display: none';\r\n    const sheet = document.styleSheets[0];\r\n    let index;\r\n    try {\r\n      index = sheet.cssRules.length;\r\n    } catch (err) {\r\n      index = 0;\r\n    }\r\n    if('insertRule' in sheet) {\r\n      sheet.insertRule(selector + '{' + rules + '}', index);\r\n    }\r\n    else if('addRule' in sheet) {\r\n      sheet.addRule(selector, rules, index);\r\n    }\r\n  }\r\n\r\n  constructor($injector, $q) {\r\n    this.$animate = ($injector.has && $injector.has('$animate')) ? $injector.get('$animate') : null;\r\n    this.isAngularVersionLessThen1_3 = angular.version.major === 1 && angular.version.minor < 3;\r\n    this.$q = $q;\r\n  }\r\n\r\n  hideElement(wrapper) {\r\n    wrapper.element.addClass(hideClassToken);\r\n  }\r\n\r\n  showElement(wrapper) {\r\n    wrapper.element.removeClass(hideClassToken);\r\n  }\r\n\r\n  insertElement(newElement, previousElement) {\r\n    previousElement.after(newElement);\r\n    return [];\r\n  }\r\n\r\n  removeElement(wrapper) {\r\n    wrapper.element.remove();\r\n    wrapper.scope.$destroy();\r\n    return [];\r\n  }\r\n\r\n  insertElementAnimated(newElement, previousElement) {\r\n    if (!this.$animate) {\r\n      return this.insertElement(newElement, previousElement);\r\n    }\r\n\r\n    if (this.isAngularVersionLessThen1_3) {\r\n      const deferred = this.$q.defer();\r\n      // no need for parent - previous element is never null\r\n      this.$animate.enter(newElement, null, previousElement, () => deferred.resolve());\r\n\r\n      return [deferred.promise];\r\n    }\r\n\r\n    // no need for parent - previous element is never null\r\n    return [this.$animate.enter(newElement, null, previousElement)];\r\n  }\r\n\r\n  removeElementAnimated(wrapper) {\r\n    if (!this.$animate) {\r\n      return this.removeElement(wrapper);\r\n    }\r\n\r\n    if (this.isAngularVersionLessThen1_3) {\r\n      const deferred = this.$q.defer();\r\n      this.$animate.leave(wrapper.element, () => {\r\n        wrapper.scope.$destroy();\r\n        return deferred.resolve();\r\n      });\r\n\r\n      return [deferred.promise];\r\n    }\r\n\r\n    return [(this.$animate.leave(wrapper.element)).then(() => wrapper.scope.$destroy())];\r\n  }\r\n}\n\n\n// WEBPACK FOOTER //\n// ./src/modules/elementRoutines.js","export default function ScrollBuffer(elementRoutines, bufferSize, startIndex) {\r\n  const buffer = Object.create(Array.prototype);\r\n\r\n  angular.extend(buffer, {\r\n    size: bufferSize,\r\n\r\n    reset(startIndex) {\r\n      buffer.remove(0, buffer.length);\r\n      buffer.eof = false;\r\n      buffer.bof = false;\r\n      buffer.first = startIndex;\r\n      buffer.next = startIndex;\r\n      buffer.minIndex = startIndex;\r\n      buffer.maxIndex = startIndex;\r\n      buffer.minIndexUser = null;\r\n      buffer.maxIndexUser = null;\r\n    },\r\n\r\n    append(items) {\r\n      items.forEach((item) => {\r\n        ++buffer.next;\r\n        buffer.insert('append', item);\r\n      });\r\n      buffer.maxIndex = buffer.eof ? buffer.next - 1 : Math.max(buffer.next - 1, buffer.maxIndex);\r\n    },\r\n\r\n    prepend(items) {\r\n      items.reverse().forEach((item) => {\r\n        --buffer.first;\r\n        buffer.insert('prepend', item);\r\n      });\r\n      buffer.minIndex = buffer.bof ? buffer.minIndex = buffer.first : Math.min(buffer.first, buffer.minIndex);\r\n    },\r\n\r\n    /**\r\n     * inserts wrapped element in the buffer\r\n     * the first argument is either operation keyword (see below) or a number for operation 'insert'\r\n     * for insert the number is the index for the buffer element the new one have to be inserted after\r\n     * operations: 'append', 'prepend', 'insert', 'remove', 'update', 'none'\r\n     */\r\n    insert(operation, item, isTop) {\r\n      const wrapper = {\r\n        item: item\r\n      };\r\n\r\n      if (operation % 1 === 0) {// it is an insert\r\n        wrapper.op = 'insert';\r\n        buffer.splice(operation, 0, wrapper);\r\n        if(isTop) {\r\n          buffer.first--;\r\n        }\r\n        else {\r\n          buffer.next++;\r\n        }\r\n      } else {\r\n        wrapper.op = operation;\r\n        switch (operation) {\r\n          case 'append':\r\n            buffer.push(wrapper);\r\n            break;\r\n          case 'prepend':\r\n            buffer.unshift(wrapper);\r\n            break;\r\n        }\r\n      }\r\n    },\r\n\r\n    // removes elements from buffer\r\n    remove(arg1, arg2) {\r\n      if (angular.isNumber(arg1)) {\r\n        // removes items from arg1 (including) through arg2 (excluding)\r\n        for (let i = arg1; i < arg2; i++) {\r\n          elementRoutines.removeElement(buffer[i]);\r\n        }\r\n        return buffer.splice(arg1, arg2 - arg1);\r\n      }\r\n      // removes single item(wrapper) from the buffer\r\n      buffer.splice(buffer.indexOf(arg1), 1);\r\n      if(arg1._op === 'isTop' && buffer.first === this.getAbsMinIndex()) {\r\n        this.incrementMinIndex();\r\n      }\r\n      else {\r\n        this.decrementMaxIndex();\r\n      }\r\n      if(arg1._op === 'isTop') {\r\n        buffer.first++;\r\n      }\r\n      else {\r\n        buffer.next--;\r\n      }\r\n      if(!buffer.length) {\r\n        buffer.first = 1;\r\n        buffer.next = 1;\r\n      }\r\n\r\n      return elementRoutines.removeElementAnimated(arg1);\r\n    },\r\n\r\n    incrementMinIndex() {\r\n      if(buffer.minIndexUser !== null) {\r\n        if(buffer.minIndex > buffer.minIndexUser) {\r\n          buffer.minIndexUser++;\r\n          return;\r\n        }\r\n        if(buffer.minIndex === buffer.minIndexUser) {\r\n          buffer.minIndexUser++;\r\n        }\r\n      }\r\n      buffer.minIndex++;\r\n    },\r\n\r\n    decrementMaxIndex() {\r\n      if(buffer.maxIndexUser !== null && buffer.maxIndex <= buffer.maxIndexUser) {\r\n        buffer.maxIndexUser--;\r\n      }\r\n      buffer.maxIndex--;\r\n    },\r\n\r\n    getAbsMinIndex() {\r\n      if(buffer.minIndexUser !== null) {\r\n        return Math.min(buffer.minIndexUser, buffer.minIndex);\r\n      }\r\n      return buffer.minIndex;\r\n    },\r\n\r\n    getAbsMaxIndex() {\r\n      if(buffer.maxIndexUser !== null) {\r\n        return Math.max(buffer.maxIndexUser, buffer.maxIndex);\r\n      }\r\n      return buffer.maxIndex;\r\n    },\r\n\r\n    effectiveHeight(elements) {\r\n      if (!elements.length) {\r\n        return 0;\r\n      }\r\n      let top = Number.MAX_VALUE;\r\n      let bottom = Number.NEGATIVE_INFINITY;\r\n      elements.forEach((wrapper) => {\r\n        if (wrapper.element[0].offsetParent) {\r\n          // element style is not display:none\r\n          top = Math.min(top, wrapper.element.offset().top);\r\n          bottom = Math.max(bottom, wrapper.element.offset().top + wrapper.element.outerHeight(true));\r\n        }\r\n      });\r\n      return Math.max(0, bottom - top);\r\n    }\r\n\r\n  });\r\n\r\n  buffer.reset(startIndex);\r\n\r\n  return buffer;\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/buffer.js","import Padding from './padding';\r\n\r\nexport default function Viewport(elementRoutines, buffer, element, viewportController, $rootScope, padding) {\r\n  let topPadding = null;\r\n  let bottomPadding = null;\r\n  const viewport = viewportController && viewportController.viewport ? viewportController.viewport : angular.element(window);\r\n  const container = viewportController && viewportController.container ? viewportController.container : undefined;\r\n  const scope = viewportController && viewportController.scope ? viewportController.scope : $rootScope;\r\n\r\n  viewport.css({\r\n    'overflow-anchor': 'none',\r\n    'overflow-y': 'auto',\r\n    'display': 'block'\r\n  });\r\n\r\n  viewport.scrollTopOriginal = viewport.scrollTopOriginal || viewport.scrollTop;\r\n  viewport.scrollTopBeforeSet = null;\r\n  viewport.scrollTopValue = null;\r\n\r\n  function bufferPadding() {\r\n    return viewport.outerHeight() * padding; // some extra space to initiate preload\r\n  }\r\n\r\n  angular.extend(viewport, {\r\n    getScope() {\r\n      return scope;\r\n    },\r\n\r\n    scrollTop() {\r\n      if (typeof arguments[0] !== 'undefined') {\r\n        viewport.scrollTopBeforeSet = viewport.scrollTop();\r\n        viewport.scrollTopValue = arguments[0];\r\n      }\r\n      return viewport.scrollTopOriginal.apply(viewport, arguments);\r\n    },\r\n\r\n    createPaddingElements(template) {\r\n      topPadding = new Padding(template);\r\n      bottomPadding = new Padding(template);\r\n      element.before(topPadding.element);\r\n      element.after(bottomPadding.element);\r\n      topPadding.height(0);\r\n      bottomPadding.height(0);\r\n    },\r\n\r\n    applyContainerStyle() {\r\n      if (!container) {\r\n        return true;\r\n      }\r\n      if(container !== viewport) {\r\n        viewport.css('height', window.getComputedStyle(container[0]).height);\r\n      }\r\n      return viewport.height() > 0;\r\n    },\r\n\r\n    bottomDataPos() {\r\n      let scrollHeight = viewport[0].scrollHeight;\r\n      scrollHeight = scrollHeight != null ? scrollHeight : viewport[0].document.documentElement.scrollHeight;\r\n      return scrollHeight - bottomPadding.height();\r\n    },\r\n\r\n    topDataPos() {\r\n      return topPadding.height();\r\n    },\r\n\r\n    bottomVisiblePos() {\r\n      return viewport.scrollTop() + viewport.outerHeight();\r\n    },\r\n\r\n    topVisiblePos() {\r\n      return viewport.scrollTop();\r\n    },\r\n\r\n    insertElement(e, sibling) {\r\n      return elementRoutines.insertElement(e, sibling || topPadding.element);\r\n    },\r\n\r\n    insertElementAnimated(e, sibling) {\r\n      return elementRoutines.insertElementAnimated(e, sibling || topPadding.element);\r\n    },\r\n\r\n    shouldLoadBottom() {\r\n      return !buffer.eof && viewport.bottomDataPos() < viewport.bottomVisiblePos() + bufferPadding();\r\n    },\r\n\r\n    clipBottom() {\r\n      // clip the invisible items off the bottom\r\n      let overage = 0;\r\n      let overageHeight = 0;\r\n      let itemHeight = 0;\r\n      let emptySpaceHeight = viewport.bottomDataPos() - viewport.bottomVisiblePos() - bufferPadding();\r\n\r\n      for (let i = buffer.length - 1; i >= 0; i--) {\r\n        itemHeight = buffer[i].element.outerHeight(true);\r\n        if (overageHeight + itemHeight > emptySpaceHeight) {\r\n          break;\r\n        }\r\n        bottomPadding.cache.add(buffer[i]);\r\n        overageHeight += itemHeight;\r\n        overage++;\r\n      }\r\n\r\n      if (overage > 0) {\r\n        buffer.eof = false;\r\n        buffer.remove(buffer.length - overage, buffer.length);\r\n        buffer.next -= overage;\r\n        viewport.adjustPaddings();\r\n      }\r\n    },\r\n\r\n    shouldLoadTop() {\r\n      return !buffer.bof && !viewport.scrollTopSetFailed && viewport.topDataPos() > viewport.topVisiblePos() - bufferPadding();\r\n    },\r\n\r\n    clipTop() {\r\n      // clip the invisible items off the top\r\n      let overage = 0;\r\n      let overageHeight = 0;\r\n      let itemHeight = 0;\r\n      let emptySpaceHeight = viewport.topVisiblePos() - viewport.topDataPos() - bufferPadding();\r\n\r\n      for (let i = 0; i < buffer.length; i++) {\r\n        itemHeight = buffer[i].element.outerHeight(true);\r\n        if (overageHeight + itemHeight > emptySpaceHeight) {\r\n          break;\r\n        }\r\n        topPadding.cache.add(buffer[i]);\r\n        overageHeight += itemHeight;\r\n        overage++;\r\n      }\r\n\r\n      if (overage > 0) {\r\n        // we need to adjust top padding element before items are removed from top\r\n        // to avoid strange behaviour of scroll bar during remove top items when we are at the very bottom\r\n        topPadding.height(topPadding.height() + overageHeight);\r\n        buffer.bof = false;\r\n        buffer.remove(0, overage);\r\n        buffer.first += overage;\r\n      }\r\n    },\r\n\r\n    adjustPaddings() {\r\n      if (!buffer.length) {\r\n        return;\r\n      }\r\n\r\n      // precise heights calculation based on items that are in buffer or that were in buffer once\r\n      const visibleItemsHeight = buffer.reduce((summ, item) => summ + item.element.outerHeight(true), 0);\r\n\r\n      let topPaddingHeight = 0, topCount = 0;\r\n      topPadding.cache.forEach(item => {\r\n        if(item.index < buffer.first) {\r\n          topPaddingHeight += item.height;\r\n          topCount++;\r\n        }\r\n      });\r\n\r\n      let bottomPaddingHeight = 0, bottomCount = 0;\r\n      bottomPadding.cache.forEach(item => {\r\n        if(item.index >= buffer.next) {\r\n          bottomPaddingHeight += item.height;\r\n          bottomCount++;\r\n        }\r\n      });\r\n\r\n      const totalHeight = visibleItemsHeight + topPaddingHeight + bottomPaddingHeight;\r\n      const averageItemHeight = totalHeight / (topCount + bottomCount + buffer.length);\r\n\r\n      // average heights calculation, items that have never been reached\r\n      let adjustTopPadding = buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser;\r\n      let adjustBottomPadding = buffer.maxIndexUser !== null && buffer.maxIndex < buffer.maxIndexUser;\r\n      let topPaddingHeightAdd = adjustTopPadding ? (buffer.minIndex - buffer.minIndexUser) * averageItemHeight : 0;\r\n      let bottomPaddingHeightAdd = adjustBottomPadding ? (buffer.maxIndexUser - buffer.maxIndex) * averageItemHeight : 0;\r\n\r\n      // paddings combine adjustment\r\n      topPadding.height(topPaddingHeight + topPaddingHeightAdd);\r\n      bottomPadding.height(bottomPaddingHeight + bottomPaddingHeightAdd);\r\n    },\r\n\r\n    onAfterMinIndexSet(topPaddingHeightOld) {\r\n      // additional scrollTop adjustment in case of datasource.minIndex external set\r\n      if (buffer.minIndexUser !== null && buffer.minIndex > buffer.minIndexUser) {\r\n        let diff = topPadding.height() - topPaddingHeightOld;\r\n        viewport.scrollTop(viewport.scrollTop() + diff);\r\n        while((diff -= viewport.scrollTop()) > 0) {\r\n          bottomPadding.height(bottomPadding.height() + diff);\r\n          viewport.scrollTop(viewport.scrollTop() + diff);\r\n        }\r\n      }\r\n    },\r\n\r\n    onAfterPrepend(updates) {\r\n      if (!updates.prepended.length)\r\n        return;\r\n      const height = buffer.effectiveHeight(updates.prepended);\r\n      const paddingHeight = topPadding.height() - height;\r\n      if (paddingHeight >= 0) {\r\n        topPadding.height(paddingHeight);\r\n      }\r\n      else {\r\n        topPadding.height(0);\r\n        viewport.scrollTopAdjust = paddingHeight;\r\n        viewport.scrollTop(viewport.scrollTop() - paddingHeight);\r\n      }\r\n    },\r\n\r\n    resetTopPadding() {\r\n      topPadding.height(0);\r\n      topPadding.cache.clear();\r\n    },\r\n\r\n    resetBottomPadding() {\r\n      bottomPadding.height(0);\r\n      bottomPadding.cache.clear();\r\n    },\r\n\r\n    removeCacheItem(item, isTop) {\r\n      topPadding.cache.remove(item, isTop);\r\n      bottomPadding.cache.remove(item, isTop);\r\n    },\r\n\r\n    removeItem(item) {\r\n      this.removeCacheItem(item);\r\n      return buffer.remove(item);\r\n    }\r\n  });\r\n\r\n  return viewport;\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/viewport.js","// Can't just extend the Array, due to Babel does not support built-in classes extending\r\n// This solution was taken from https://stackoverflow.com/questions/46897414/es6-class-extends-array-workaround-for-es5-babel-transpile\r\nclass CacheProto {\r\n  add(item) {\r\n    for (let i = this.length - 1; i >= 0; i--) {\r\n      if (this[i].index === item.scope.$index) {\r\n        this[i].height = item.element.outerHeight();\r\n        return;\r\n      }\r\n    }\r\n    this.push({\r\n      index: item.scope.$index,\r\n      height: item.element.outerHeight()\r\n    });\r\n    this.sort((a, b) => ((a.index < b.index) ? -1 : ((a.index > b.index) ? 1 : 0)));\r\n  }\r\n\r\n  remove(argument, _isTop) {\r\n    const index = argument % 1 === 0 ? argument : argument.scope.$index;\r\n    const isTop = argument % 1 === 0 ? _isTop : argument._op === 'isTop';\r\n    for (let i = this.length - 1; i >= 0; i--) {\r\n      if (this[i].index === index) {\r\n        this.splice(i, 1);\r\n        break;\r\n      }\r\n    }\r\n    if(!isTop) {\r\n      for (let i = this.length - 1; i >= 0; i--) {\r\n        if (this[i].index > index) {\r\n          this[i].index--;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  clear() {\r\n    this.length = 0;\r\n  }\r\n}\r\n\r\nfunction Cache() {\r\n  const instance = [];\r\n  instance.push.apply(instance, arguments);\r\n  Object.setPrototypeOf(instance, Cache.prototype);\r\n  return instance;\r\n}\r\nCache.prototype = Object.create(Array.prototype);\r\nObject.getOwnPropertyNames(CacheProto.prototype).forEach(methodName =>\r\n  Cache.prototype[methodName] = CacheProto.prototype[methodName]\r\n);\r\n\r\nfunction generateElement(template) {\r\n  if(template.nodeType !== Node.ELEMENT_NODE) {\r\n    throw new Error('ui-scroll directive requires an Element node for templating the view');\r\n  }\r\n  let element;\r\n  switch (template.tagName.toLowerCase()) {\r\n    case 'dl':\r\n      throw new Error(`ui-scroll directive does not support <${template.tagName}> as a repeating tag: ${template.outerHTML}`);\r\n    case 'tr':\r\n      let table = angular.element('<table><tr><td><div></div></td></tr></table>');\r\n      element = table.find('tr');\r\n      break;\r\n    case 'li':\r\n      element = angular.element('<li></li>');\r\n      break;\r\n    default:\r\n      element = angular.element('<div></div>');\r\n  }\r\n  return element;\r\n}\r\n\r\nclass Padding {\r\n  constructor(template) {\r\n    this.element = generateElement(template);\r\n    this.cache = new Cache();\r\n  }\r\n\r\n  height() {\r\n    return this.element.height.apply(this.element, arguments);\r\n  }\r\n}\r\n\r\nexport default Padding;\n\n\n// WEBPACK FOOTER //\n// ./src/modules/padding.js","class Adapter {\r\n\r\n  constructor($scope, $parse, $attr, viewport, buffer, doAdjust, reload) {\r\n    this.$parse = $parse;\r\n    this.$attr = $attr;\r\n    this.viewport = viewport;\r\n    this.buffer = buffer;\r\n\r\n    this.doAdjust = doAdjust;\r\n    this.reload = reload;\r\n\r\n    this.isLoading = false;\r\n    this.disabled = false;\r\n\r\n    const viewportScope = viewport.getScope();\r\n    this.startScope = viewportScope.$parent ? viewportScope : $scope;\r\n\r\n    this.publicContext = {};\r\n    this.assignAdapter($attr.adapter);\r\n    this.generatePublicContext();\r\n  }\r\n\r\n  assignAdapter(adapterAttr) {\r\n    if (!adapterAttr || !(adapterAttr = adapterAttr.replace(/^\\s+|\\s+$/gm, ''))) {\r\n      return;\r\n    }\r\n    let adapterOnScope;\r\n\r\n    try {\r\n      this.$parse(adapterAttr).assign(this.startScope, {});\r\n      adapterOnScope = this.$parse(adapterAttr)(this.startScope);\r\n    }\r\n    catch (error) {\r\n      error.message = `Angular ui-scroll Adapter assignment exception.\\n` +\r\n        `Can't parse \"${adapterAttr}\" expression.\\n` +\r\n        error.message;\r\n      throw error;\r\n    }\r\n\r\n    angular.extend(adapterOnScope, this.publicContext);\r\n    this.publicContext = adapterOnScope;\r\n  }\r\n\r\n  generatePublicContext() {\r\n    // these methods will be accessible out of ui-scroll via user defined adapter\r\n    const publicMethods = ['reload', 'applyUpdates', 'append', 'prepend', 'isBOF', 'isEOF', 'isEmpty', 'resetScrollTopCorrection'];\r\n    for (let i = publicMethods.length - 1; i >= 0; i--) {\r\n      this.publicContext[publicMethods[i]] = this[publicMethods[i]].bind(this);\r\n    }\r\n\r\n    // these read-only props will be accessible out of ui-scroll via user defined adapter\r\n    const publicProps = ['isLoading', 'topVisible', 'topVisibleElement', 'topVisibleScope', 'bottomVisible', 'bottomVisibleElement', 'bottomVisibleScope'];\r\n    for (let i = publicProps.length - 1; i >= 0; i--) {\r\n      let property, attr = this.$attr[publicProps[i]];\r\n      Object.defineProperty(this, publicProps[i], {\r\n        get: () => property,\r\n        set: (value) => {\r\n          property = value;\r\n          this.publicContext[publicProps[i]] = value;\r\n          if (attr) {\r\n            this.$parse(attr).assign(this.startScope, value);\r\n          }\r\n        }\r\n      });\r\n    }\r\n\r\n    // non-read-only public property\r\n    Object.defineProperty(this.publicContext, 'disabled', {\r\n      get: () => this.disabled,\r\n      set: (value) => (!(this.disabled = value)) ? this.doAdjust() : null\r\n    });\r\n  }\r\n\r\n  loading(value) {\r\n    this.isLoading = value;\r\n  }\r\n\r\n  isBOF() {\r\n    return this.buffer.bof;\r\n  }\r\n\r\n  isEOF() {\r\n    return this.buffer.eof;\r\n  }\r\n\r\n  isEmpty() {\r\n    return !this.buffer.length;\r\n  }\r\n\r\n  resetScrollTopCorrection() {\r\n    // is needed to scroll at negative area programmatically (e.g. tests)\r\n    this.viewport.scrollTopValue = null;\r\n  }\r\n\r\n  append(newItems) {\r\n    this.buffer.append(newItems);\r\n    this.doAdjust();\r\n    this.viewport.clipTop();\r\n    this.viewport.clipBottom();\r\n  }\r\n\r\n  prepend(newItems) {\r\n    this.buffer.prepend(newItems);\r\n    this.doAdjust();\r\n    this.viewport.clipTop();\r\n    this.viewport.clipBottom();\r\n  }\r\n\r\n  applyUpdates(arg1, arg2) {\r\n    if (typeof arg1 === 'function') {\r\n      this.applyUpdatesFunc(arg1);\r\n    } else {\r\n      this.applyUpdatesIndex(arg1, arg2);\r\n    }\r\n    this.doAdjust();\r\n  }\r\n\r\n  applyUpdatesFunc(cb) {\r\n    this.buffer.slice(0).forEach((wrapper) => {\r\n      // we need to do it on the buffer clone, because buffer content\r\n      // may change as we iterate through\r\n      this.applyUpdate(wrapper, cb(wrapper.item, wrapper.scope, wrapper.element));\r\n    });\r\n  }\r\n\r\n  applyUpdatesIndex(index, newItems) {\r\n    if (index % 1 !== 0) {\r\n      throw new Error('applyUpdates - ' + index + ' is not a valid index (should be an integer)');\r\n    }\r\n    const _index = index - this.buffer.first;\r\n\r\n    // apply updates only within buffer\r\n    if (_index >= 0 && _index < this.buffer.length) {\r\n      this.applyUpdate(this.buffer[_index], newItems);\r\n    }\r\n    // out-of-buffer case: deletion may affect Paddings\r\n    else if(index >= this.buffer.getAbsMinIndex() && index <= this.buffer.getAbsMaxIndex()) {\r\n      if(angular.isArray(newItems) && !newItems.length) {\r\n        this.viewport.removeCacheItem(index, index === this.buffer.minIndex);\r\n        if(index === this.buffer.getAbsMinIndex()) {\r\n          this.buffer.incrementMinIndex();\r\n        }\r\n        else {\r\n          this.buffer.decrementMaxIndex();\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  applyUpdate(wrapper, newItems) {\r\n    if (!angular.isArray(newItems)) {\r\n      return;\r\n    }\r\n    let position = this.buffer.indexOf(wrapper);\r\n    if (!newItems.reverse().some(newItem => newItem === wrapper.item)) {\r\n      wrapper.op = 'remove';\r\n      if(position === 0 && !newItems.length) {\r\n        wrapper._op = 'isTop'; // to catch \"first\" edge case on remove\r\n      }\r\n    }\r\n    newItems.forEach((newItem) => {\r\n      if (newItem === wrapper.item) {\r\n        position--;\r\n      } else {\r\n        // 3 parameter (isTop) is to catch \"first\" edge case on insert\r\n        this.buffer.insert(position + 1, newItem, position === -1);\r\n      }\r\n    });\r\n  }\r\n\r\n  calculateProperties() {\r\n    let rowTop = null, topHeight = 0;\r\n    let topDone = false, bottomDone = false;\r\n    const length = this.buffer.length;\r\n\r\n    for (let i = 0; i < length; i++) {\r\n      const item = this.buffer[i];\r\n      const itemTop = item.element.offset().top;\r\n\r\n      if (rowTop !== itemTop) { // a new row condition\r\n        const itemHeight = item.element.outerHeight(true);\r\n        const top = this.viewport.topDataPos() + topHeight + itemHeight;\r\n\r\n        if (!topDone && top > this.viewport.topVisiblePos()) {\r\n          topDone = true;\r\n          this['topVisible'] = item.item;\r\n          this['topVisibleElement'] = item.element;\r\n          this['topVisibleScope'] = item.scope;\r\n        }\r\n        if (!bottomDone && (top >= this.viewport.bottomVisiblePos() || (i === length - 1 && this.isEOF()))) {\r\n          bottomDone = true;\r\n          this['bottomVisible'] = item.item;\r\n          this['bottomVisibleElement'] = item.element;\r\n          this['bottomVisibleScope'] = item.scope;\r\n        }\r\n        topHeight += itemHeight;\r\n      }\r\n      rowTop = itemTop;\r\n\r\n      if (topDone && bottomDone) {\r\n        break;\r\n      }\r\n    }\r\n  }\r\n\r\n}\r\n\r\nexport default Adapter;\r\n\n\n\n// WEBPACK FOOTER //\n// ./src/modules/adapter.js"],"sourceRoot":""}
\ No newline at end of file
diff --git a/package.json b/package.json
index 82d926b3..88bf2623 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "angular-ui-scroll",
   "description": "AngularJS infinite scrolling module",
-  "version": "1.7.2",
+  "version": "1.8.0-rc",
   "src": "./src/",
   "public": "./dist/",
   "main": "./dist/ui-scroll.js",
diff --git a/src/modules/adapter.js b/src/modules/adapter.js
index 09e8767a..1f597e35 100644
--- a/src/modules/adapter.js
+++ b/src/modules/adapter.js
@@ -43,7 +43,7 @@ class Adapter {
 
   generatePublicContext() {
     // these methods will be accessible out of ui-scroll via user defined adapter
-    const publicMethods = ['reload', 'applyUpdates', 'append', 'prepend', 'isBOF', 'isEOF', 'isEmpty'];
+    const publicMethods = ['reload', 'applyUpdates', 'append', 'prepend', 'isBOF', 'isEOF', 'isEmpty', 'resetScrollTopCorrection'];
     for (let i = publicMethods.length - 1; i >= 0; i--) {
       this.publicContext[publicMethods[i]] = this[publicMethods[i]].bind(this);
     }
@@ -87,6 +87,11 @@ class Adapter {
     return !this.buffer.length;
   }
 
+  resetScrollTopCorrection() {
+    // is needed to scroll at negative area programmatically (e.g. tests)
+    this.viewport.scrollTopValue = null;
+  }
+
   append(newItems) {
     this.buffer.append(newItems);
     this.doAdjust();
diff --git a/src/modules/viewport.js b/src/modules/viewport.js
index 4f64acb9..b85710b7 100644
--- a/src/modules/viewport.js
+++ b/src/modules/viewport.js
@@ -13,6 +13,10 @@ export default function Viewport(elementRoutines, buffer, element, viewportContr
     'display': 'block'
   });
 
+  viewport.scrollTopOriginal = viewport.scrollTopOriginal || viewport.scrollTop;
+  viewport.scrollTopBeforeSet = null;
+  viewport.scrollTopValue = null;
+
   function bufferPadding() {
     return viewport.outerHeight() * padding; // some extra space to initiate preload
   }
@@ -22,6 +26,14 @@ export default function Viewport(elementRoutines, buffer, element, viewportContr
       return scope;
     },
 
+    scrollTop() {
+      if (typeof arguments[0] !== 'undefined') {
+        viewport.scrollTopBeforeSet = viewport.scrollTop();
+        viewport.scrollTopValue = arguments[0];
+      }
+      return viewport.scrollTopOriginal.apply(viewport, arguments);
+    },
+
     createPaddingElements(template) {
       topPadding = new Padding(template);
       bottomPadding = new Padding(template);
@@ -97,7 +109,7 @@ export default function Viewport(elementRoutines, buffer, element, viewportContr
     },
 
     shouldLoadTop() {
-      return !buffer.bof && (viewport.topDataPos() > viewport.topVisiblePos() - bufferPadding());
+      return !buffer.bof && !viewport.scrollTopSetFailed && viewport.topDataPos() > viewport.topVisiblePos() - bufferPadding();
     },
 
     clipTop() {
@@ -187,6 +199,7 @@ export default function Viewport(elementRoutines, buffer, element, viewportContr
       }
       else {
         topPadding.height(0);
+        viewport.scrollTopAdjust = paddingHeight;
         viewport.scrollTop(viewport.scrollTop() - paddingHeight);
       }
     },
diff --git a/src/ui-scroll.js b/src/ui-scroll.js
index f5d1aa96..c9deee76 100644
--- a/src/ui-scroll.js
+++ b/src/ui-scroll.js
@@ -67,7 +67,7 @@ angular.module('ui.scroll', [])
 
         const BUFFER_MIN = 3;
         const BUFFER_DEFAULT = 10;
-        const PADDING_MIN = 0.3;
+        const PADDING_MIN = 0.01;
         const PADDING_DEFAULT = 0.5;
         const MAX_VIEWPORT_DELAY = 500;
         const VIEWPORT_POLLING_INTERVAL = 50;
@@ -475,18 +475,40 @@ angular.module('ui.scroll', [])
           }
         }
 
-        function resizeAndScrollHandler() {
-          if (!$rootScope.$$phase && !adapter.isLoading && !adapter.disabled) {
+        function resizeAndScrollHandler(ev) {
+          if ($rootScope.$$phase || adapter.isLoading || adapter.disabled) {
+            return;
+          }
 
-            enqueueFetch(ridActual);
+          if (ev.type === 'scroll') {
+            // Don't process scroll event if it was triggered by us setting scrollTop.
+            if (viewport[0].scrollTop === viewport.scrollTopValue) {
+              return false;
+            }
 
-            if (pending.length) {
-              unbindEvents();
-            } else {
-              adapter.calculateProperties();
-              !$scope.$$phase && $scope.$digest();
+            // Check if we tried to set scrollTop and it failed. If that happens, don't prepend more items based on the stale value
+            // of scrollTop that will be used by shouldLoadTop(). Also, try to set it again.
+            viewport.scrollTopSetFailed = false;
+            if (viewport.scrollTopValue != null) {
+              const curScrollTop = viewport[0].scrollTop;
+              if (Math.abs(curScrollTop - viewport.scrollTopValue) > Math.abs(curScrollTop - viewport.scrollTopBeforeSet)) {
+                viewport.scrollTopSetFailed = true;
+                viewport.scrollTop(curScrollTop - viewport.scrollTopAdjust);
+              }
             }
           }
+
+          enqueueFetch(ridActual);
+
+          // we got a real scroll event, so browser is now in charge of scrollTop
+          viewport.scrollTopValue = null;
+
+          if (pending.length) {
+            unbindEvents();
+          } else {
+            adapter.calculateProperties();
+            !$scope.$$phase && $scope.$digest();
+          }
         }
 
         function wheelHandler(event) {
diff --git a/test/BasicTestsSpec.js b/test/BasicTestsSpec.js
index af792169..3c8dcc0b 100644
--- a/test/BasicTestsSpec.js
+++ b/test/BasicTestsSpec.js
@@ -409,9 +409,12 @@ describe('uiScroll', function () {
                     datasource: 'myEdgeDatasource',
                     bufferSize: buffer,
                     viewportHeight: viewportHeight,
-                    itemHeight: itemHeight
+                    itemHeight: itemHeight,
+                    adapter: 'adapter'
                 },
-                function (viewport) {
+                function (viewport, scope) {
+                    scope.adapter.resetScrollTopCorrection();
+
                     viewport.scrollTop(0); //first full, scroll to -2
                     viewport.trigger('scroll');
 
@@ -433,7 +436,12 @@ describe('uiScroll', function () {
     });
 
     describe('prevent unwanted scroll bubbling', function () {
-        var scrollSettings = { datasource: 'myDatasourceToPreventScrollBubbling', bufferSize: 3, viewportHeight: 300 };
+        var scrollSettings = {
+            datasource: 'myDatasourceToPreventScrollBubbling',
+            bufferSize: 3,
+            viewportHeight: 300,
+            adapter: 'adapter'
+        };
         var documentScrollBubblingCount = 0;
 
         var incrementDocumentScrollCount = function (event) {
@@ -457,7 +465,7 @@ describe('uiScroll', function () {
             });
 
             runTest(scrollSettings,
-                function (viewport) {
+                function (viewport, scope) {
                     var wheelEventElement = viewport[0];
 
                     angular.element(document.body).bind('mousewheel', incrementDocumentScrollCount); //spy for wheel-events bubbling
@@ -467,6 +475,8 @@ describe('uiScroll', function () {
                     wheelEventElement.dispatchEvent(getNewWheelEvent()); //preventDefault will not occurred but the document will not scroll because of viewport will be scrolled
                     expect(documentScrollBubblingCount).toBe(1);
 
+                    scope.adapter.resetScrollTopCorrection();
+
                     viewport.scrollTop(0);
                     viewport.trigger('scroll');
 
@@ -504,7 +514,8 @@ describe('uiScroll', function () {
             datasource: 'myInfiniteDatasource',
             viewportHeight: viewportHeight,
             itemHeight: itemHeight,
-            bufferSize: bufferSize
+            bufferSize: bufferSize,
+            adapter: 'adapter'
         };
 
         it('should calculate top padding element\'s height during scroll down', function () {
@@ -522,7 +533,8 @@ describe('uiScroll', function () {
 
         it('should calculate bottom padding element\'s height during scroll up', function () {
             runTest(scrollSettings,
-                function (viewport) {
+                function (viewport, scope) {
+                    scope.adapter.resetScrollTopCorrection();
                     // scroll up + expectation
                     for(var i = 0; i < 6; i++) {
                         viewport.scrollTop(-5000);
@@ -747,7 +759,8 @@ describe('uiScroll', function () {
       datasource: 'myInfiniteDatasource',
       template: myTemplate,
       topVisible: 'topVisible',
-      bufferSize: 10
+      bufferSize: 10,
+      adapter: 'adapter'
     };
 
     it('should keep 1st item at the top after initial auto fetching is done', function() {
@@ -766,6 +779,7 @@ describe('uiScroll', function () {
     it('should keep (-bufferSize) item at the top after one manual fetching is done', function() {
       runTest(scrollSettings,
         function (viewport, scope) {
+          scope.adapter.resetScrollTopCorrection();
 
           viewport.scrollTop(0); // scroll to the very top
           viewport.trigger('scroll');