wip: weex basic transition support

yyx990803 · yyx990803 · commit 701942f8f8cb · 2017-01-06T17:25:19.000-05:00
diff --git a/src/platforms/weex/runtime/components/index.js b/src/platforms/weex/runtime/components/index.js
@@ -0,0 +1,5 @@
+import Transition from 'web/runtime/components/transition'
+
+export default {
+  Transition
+}
diff --git a/src/platforms/weex/runtime/index.js b/src/platforms/weex/runtime/index.js
@@ -3,15 +3,17 @@
 import Vue from 'core/index'
 import { patch } from 'weex/runtime/patch'
 import platformDirectives from 'weex/runtime/directives/index'
+import platformComponents from 'weex/runtime/components/index'
 import { query, isUnknownElement, isReservedTag, mustUseProp } from 'weex/util/index'
 
 // install platform specific utils
 Vue.config.isUnknownElement = isUnknownElement
 Vue.config.isReservedTag = isReservedTag
 Vue.config.mustUseProp = mustUseProp
 
-// install platform runtime directives
+// install platform runtime directives and components
 Vue.options.directives = platformDirectives
+Vue.options.components = platformComponents
 
 // install platform patch function
 Vue.prototype.__patch__ = patch
diff --git a/src/platforms/weex/runtime/modules/index.js b/src/platforms/weex/runtime/modules/index.js
@@ -2,10 +2,12 @@ import attrs from './attrs'
 import klass from './class'
 import events from './events'
 import style from './style'
+import transition from './transition'
 
 export default [
   attrs,
   klass,
   events,
-  style
+  style,
+  transition
 ]
diff --git a/src/platforms/weex/runtime/modules/transition.js b/src/platforms/weex/runtime/modules/transition.js
@@ -0,0 +1,266 @@
+import { extend, cached, noop } from 'shared/util'
+import { activeInstance } from 'core/instance/lifecycle'
+
+export default {
+  create: enter,
+  activate: enter,
+  remove: leave
+}
+
+function enter (_, vnode) {
+  const el = vnode.elm
+
+  // call leave callback now
+  if (el._leaveCb) {
+    el._leaveCb.cancelled = true
+    el._leaveCb()
+  }
+
+  const data = resolveTransition(vnode.data.transition)
+  if (!data) {
+    return
+  }
+
+  /* istanbul ignore if */
+  if (el._enterCb) {
+    return
+  }
+
+  const {
+    enterClass,
+    enterActiveClass,
+    appearClass,
+    appearActiveClass,
+    beforeEnter,
+    enter,
+    afterEnter,
+    enterCancelled,
+    beforeAppear,
+    appear,
+    afterAppear,
+    appearCancelled
+  } = data
+
+  let context = activeInstance
+  let transitionNode = activeInstance.$vnode
+  while (transitionNode && transitionNode.parent) {
+    transitionNode = transitionNode.parent
+    context = transitionNode.context
+  }
+
+  const isAppear = !context._isMounted || !vnode.isRootInsert
+
+  if (isAppear && !appear && appear !== '') {
+    return
+  }
+
+  const startClass = isAppear ? appearClass : enterClass
+  const activeClass = isAppear ? appearActiveClass : enterActiveClass
+  const beforeEnterHook = isAppear ? (beforeAppear || beforeEnter) : beforeEnter
+  const enterHook = isAppear ? (typeof appear === 'function' ? appear : enter) : enter
+  const afterEnterHook = isAppear ? (afterAppear || afterEnter) : afterEnter
+  const enterCancelledHook = isAppear ? (appearCancelled || enterCancelled) : enterCancelled
+
+  const userWantsControl =
+    enterHook &&
+    // enterHook may be a bound method which exposes
+    // the length of original fn as _length
+    (enterHook._length || enterHook.length) > 1
+
+  const stylesheet = vnode.context.$options.style || {}
+  const startState = stylesheet[startClass]
+  const endState = stylesheet[activeClass]
+  const expectsCSS = startState && endState
+
+  const cb = el._enterCb = once(() => {
+    if (cb.cancelled) {
+      enterCancelledHook && enterCancelledHook(el)
+    } else {
+      afterEnterHook && afterEnterHook(el)
+    }
+    el._enterCb = null
+  })
+
+  // remove pending leave element on enter by injecting an insert hook
+  // mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'insert', () => {
+
+  // }, 'transition-insert')
+
+  setTimeout(() => {
+    const parent = el.parentNode
+    const pendingNode = parent && parent._pending && parent._pending[vnode.key]
+    if (pendingNode &&
+        pendingNode.context === vnode.context &&
+        pendingNode.tag === vnode.tag &&
+        pendingNode.elm._leaveCb) {
+      pendingNode.elm._leaveCb()
+    }
+    enterHook && enterHook(el, cb)
+
+    if (endState) {
+      const animation = vnode.context.$options.animation
+      animation.transition(el.ref, {
+        styles: endState,
+        duration: 300,
+        timingFunction: 'ease-in-out'
+      }, userWantsControl ? noop : cb)
+    } else if (!userWantsControl) {
+      cb()
+    }
+    // if (expectsCSS) {
+    //   animation.transition(el.ref, {
+    //     styles: startState
+    //   }, () => {
+    //     animation.transition(el.ref, {
+    //       styles: endState,
+    //       duration: 300,
+    //       timingFunction: 'ease-in-out'
+    //     }, userWantsControl ? noop : cb)
+    //   })
+    // }
+  }, 16)
+
+  // start enter transition
+  beforeEnterHook && beforeEnterHook(el)
+
+  if (startState) {
+    for (const key in startState) {
+      el.setStyle(key, startState[key])
+    }
+  }
+
+  if (!expectsCSS && !userWantsControl) {
+    cb()
+  }
+}
+
+function leave (vnode, rm) {
+  const el = vnode.elm
+
+  // call enter callback now
+  if (el._enterCb) {
+    el._enterCb.cancelled = true
+    el._enterCb()
+  }
+
+  const data = resolveTransition(vnode.data.transition)
+  if (!data) {
+    return rm()
+  }
+
+  if (el._leaveCb) {
+    return
+  }
+
+  const {
+    leaveClass,
+    leaveActiveClass,
+    beforeLeave,
+    leave,
+    afterLeave,
+    leaveCancelled,
+    delayLeave
+  } = data
+
+  const userWantsControl =
+    leave &&
+    // leave hook may be a bound method which exposes
+    // the length of original fn as _length
+    (leave._length || leave.length) > 1
+
+  const stylesheet = vnode.context.$options.style || {}
+  const startState = stylesheet[leaveClass]
+  const endState = stylesheet[leaveActiveClass]
+  const expectsCSS = startState && endState
+
+  const cb = el._leaveCb = once(() => {
+    if (el.parentNode && el.parentNode._pending) {
+      el.parentNode._pending[vnode.key] = null
+    }
+    if (cb.cancelled) {
+      leaveCancelled && leaveCancelled(el)
+    } else {
+      rm()
+      afterLeave && afterLeave(el)
+    }
+    el._leaveCb = null
+  })
+
+  if (delayLeave) {
+    delayLeave(performLeave)
+  } else {
+    performLeave()
+  }
+
+  function performLeave () {
+    const animation = vnode.context.$options.animation
+    // the delayed leave may have already been cancelled
+    if (cb.cancelled) {
+      return
+    }
+    // record leaving element
+    if (!vnode.data.show) {
+      (el.parentNode._pending || (el.parentNode._pending = {}))[vnode.key] = vnode
+    }
+    beforeLeave && beforeLeave(el)
+
+    if (startState) {
+      animation.transition(el.ref, {
+        styles: startState
+      }, next)
+    } else {
+      next()
+    }
+
+    function next () {
+      animation.transition(el.ref, {
+        styles: endState,
+        duration: 300,
+        timingFunction: 'ease-in-out'
+      }, userWantsControl ? noop : cb)
+    }
+
+    leave && leave(el, cb)
+    if (!expectsCSS && !userWantsControl) {
+      cb()
+    }
+  }
+}
+
+function resolveTransition (def) {
+  if (!def) {
+    return
+  }
+  /* istanbul ignore else */
+  if (typeof def === 'object') {
+    const res = {}
+    if (def.css !== false) {
+      extend(res, autoCssTransition(def.name || 'v'))
+    }
+    extend(res, def)
+    return res
+  } else if (typeof def === 'string') {
+    return autoCssTransition(def)
+  }
+}
+
+function once (fn) {
+  let called = false
+  return () => {
+    if (!called) {
+      called = true
+      fn()
+    }
+  }
+}
+
+const autoCssTransition = cached(name => {
+  return {
+    enterClass: `${name}-enter`,
+    leaveClass: `${name}-leave`,
+    appearClass: `${name}-enter`,
+    enterActiveClass: `${name}-enter-active`,
+    leaveActiveClass: `${name}-leave-active`,
+    appearActiveClass: `${name}-enter-active`
+  }
+})
