|
| 1 | +#ifdef _______STRINGIFY |
| 2 | +#error _______STRINGIFY already defined! |
| 3 | +#endif |
| 4 | +#define _______STRINGIFY(x) #x |
| 5 | +_______STRINGIFY( |
| 6 | +;(function() { |
| 7 | + if (window.WebViewJavascriptBridge) { return; } |
| 8 | + var messagingIframe; |
| 9 | + var sendMessageQueue = []; |
| 10 | + var receiveMessageQueue = []; |
| 11 | + var messageHandlers = {}; |
| 12 | + |
| 13 | + var CUSTOM_PROTOCOL_SCHEME = 'wvjbscheme'; |
| 14 | + var QUEUE_HAS_MESSAGE = '__WVJB_QUEUE_MESSAGE__'; |
| 15 | + |
| 16 | + var responseCallbacks = {}; |
| 17 | + var uniqueId = 1; |
| 18 | + |
| 19 | + function _createQueueReadyIframe(doc) { |
| 20 | + messagingIframe = doc.createElement('iframe'); |
| 21 | + messagingIframe.style.display = 'none'; |
| 22 | + messagingIframe.src = CUSTOM_PROTOCOL_SCHEME + '://' + QUEUE_HAS_MESSAGE; |
| 23 | + doc.documentElement.appendChild(messagingIframe); |
| 24 | + } |
| 25 | + |
| 26 | + function init(messageHandler) { |
| 27 | + if (WebViewJavascriptBridge._messageHandler) { throw new Error('WebViewJavascriptBridge.init called twice'); } |
| 28 | + WebViewJavascriptBridge._messageHandler = messageHandler; |
| 29 | + var receivedMessages = receiveMessageQueue; |
| 30 | + receiveMessageQueue = null; |
| 31 | + for (var i=0; i<receivedMessages.length; i++) { |
| 32 | + _dispatchMessageFromObjC(receivedMessages[i]); |
| 33 | + } |
| 34 | + } |
| 35 | + |
| 36 | + function send(data, responseCallback) { |
| 37 | + _doSend({ data:data }, responseCallback); |
| 38 | + } |
| 39 | + |
| 40 | + function registerHandler(handlerName, handler) { |
| 41 | + messageHandlers[handlerName] = handler; |
| 42 | + } |
| 43 | + |
| 44 | + function callHandler(handlerName, data, responseCallback) { |
| 45 | + _doSend({ handlerName:handlerName, data:data }, responseCallback); |
| 46 | + } |
| 47 | + |
| 48 | + function _doSend(message, responseCallback) { |
| 49 | + if (responseCallback) { |
| 50 | + var callbackId = 'cb_'+(uniqueId++)+'_'+new Date().getTime(); |
| 51 | + responseCallbacks[callbackId] = responseCallback; |
| 52 | + message['callbackId'] = callbackId; |
| 53 | + } |
| 54 | + sendMessageQueue.push(message); |
| 55 | + messagingIframe.src = CUSTOM_PROTOCOL_SCHEME + '://' + QUEUE_HAS_MESSAGE; |
| 56 | + } |
| 57 | + |
| 58 | + function _fetchQueue() { |
| 59 | + var messageQueueString = JSON.stringify(sendMessageQueue); |
| 60 | + sendMessageQueue = []; |
| 61 | + return messageQueueString; |
| 62 | + } |
| 63 | + |
| 64 | + function _dispatchMessageFromObjC(messageJSON) { |
| 65 | + setTimeout(function _timeoutDispatchMessageFromObjC() { |
| 66 | + var message = JSON.parse(messageJSON); |
| 67 | + var messageHandler; |
| 68 | + var responseCallback; |
| 69 | + |
| 70 | + if (message.responseId) { |
| 71 | + responseCallback = responseCallbacks[message.responseId]; |
| 72 | + if (!responseCallback) { return; } |
| 73 | + responseCallback(message.responseData); |
| 74 | + delete responseCallbacks[message.responseId]; |
| 75 | + } else { |
| 76 | + if (message.callbackId) { |
| 77 | + var callbackResponseId = message.callbackId; |
| 78 | + responseCallback = function(responseData) { |
| 79 | + _doSend({ responseId:callbackResponseId, responseData:responseData }); |
| 80 | + } |
| 81 | + } |
| 82 | + |
| 83 | + var handler = WebViewJavascriptBridge._messageHandler; |
| 84 | + if (message.handlerName) { |
| 85 | + handler = messageHandlers[message.handlerName]; |
| 86 | + } |
| 87 | + |
| 88 | + try { |
| 89 | + handler(message.data, responseCallback); |
| 90 | + } catch(exception) { |
| 91 | + if (typeof console != 'undefined') { |
| 92 | + console.log("WebViewJavascriptBridge: WARNING: javascript handler threw.", message, exception); |
| 93 | + } |
| 94 | + } |
| 95 | + } |
| 96 | + }) |
| 97 | + } |
| 98 | + |
| 99 | + function _handleMessageFromObjC(messageJSON) { |
| 100 | + if (receiveMessageQueue) { |
| 101 | + receiveMessageQueue.push(messageJSON); |
| 102 | + } else { |
| 103 | + _dispatchMessageFromObjC(messageJSON); |
| 104 | + } |
| 105 | + } |
| 106 | + |
| 107 | + window.WebViewJavascriptBridge = { |
| 108 | + init: init, |
| 109 | + send: send, |
| 110 | + registerHandler: registerHandler, |
| 111 | + callHandler: callHandler, |
| 112 | + _fetchQueue: _fetchQueue, |
| 113 | + _handleMessageFromObjC: _handleMessageFromObjC |
| 114 | + }; |
| 115 | + |
| 116 | + var doc = document; |
| 117 | + _createQueueReadyIframe(doc); |
| 118 | + var readyEvent = doc.createEvent('Events'); |
| 119 | + readyEvent.initEvent('WebViewJavascriptBridgeReady'); |
| 120 | + readyEvent.bridge = WebViewJavascriptBridge; |
| 121 | + doc.dispatchEvent(readyEvent); |
| 122 | +})(); |
| 123 | +) |
| 124 | +#undef _______STRINGIFY |
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