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| 1 | +// |
| 2 | +// WKWebViewJavascriptBridgeJS.swift |
| 3 | +// WKWebViewJavascriptBridge |
| 4 | +// |
| 5 | +// Created by Lision on 2018/1/21. |
| 6 | +// Copyright © 2018年 Lision. All rights reserved. |
| 7 | +// |
| 8 | + |
| 9 | +import Foundation |
| 10 | + |
| 11 | +let WKWebViewJavascriptBridgeJS = """ |
| 12 | +;(function() { |
| 13 | + if (window.WKWebViewJavascriptBridge) { |
| 14 | + return; |
| 15 | + } |
| 16 | +
|
| 17 | + if (!window.onerror) { |
| 18 | + window.onerror = function(msg, url, line) { |
| 19 | + console.log("WKWebViewJavascriptBridge: ERROR:" + msg + "@" + url + ":" + line); |
| 20 | + } |
| 21 | + } |
| 22 | + window.WKWebViewJavascriptBridge = { |
| 23 | + registerHandler: registerHandler, |
| 24 | + callHandler: callHandler, |
| 25 | + disableJavscriptAlertBoxSafetyTimeout: disableJavscriptAlertBoxSafetyTimeout, |
| 26 | + _fetchQueue: _fetchQueue, |
| 27 | + _handleMessageFromiOS: _handleMessageFromiOS |
| 28 | + }; |
| 29 | +
|
| 30 | + var messagingIframe; |
| 31 | + var sendMessageQueue = []; |
| 32 | + var messageHandlers = {}; |
| 33 | +
|
| 34 | + var CUSTOM_PROTOCOL_SCHEME = 'https'; |
| 35 | + var QUEUE_HAS_MESSAGE = '__wvjb_queue_message__'; |
| 36 | +
|
| 37 | + var responseCallbacks = {}; |
| 38 | + var uniqueId = 1; |
| 39 | + var dispatchMessagesWithTimeoutSafety = true; |
| 40 | +
|
| 41 | + function registerHandler(handlerName, handler) { |
| 42 | + messageHandlers[handlerName] = handler; |
| 43 | + } |
| 44 | +
|
| 45 | + function callHandler(handlerName, data, responseCallback) { |
| 46 | + if (arguments.length == 2 && typeof data == 'function') { |
| 47 | + responseCallback = data; |
| 48 | + data = null; |
| 49 | + } |
| 50 | + _doSend({ handlerName:handlerName, data:data }, responseCallback); |
| 51 | + } |
| 52 | + function disableJavscriptAlertBoxSafetyTimeout() { |
| 53 | + dispatchMessagesWithTimeoutSafety = false; |
| 54 | + } |
| 55 | +
|
| 56 | + function _doSend(message, responseCallback) { |
| 57 | + if (responseCallback) { |
| 58 | + var callbackId = 'cb_'+(uniqueId++)+'_'+new Date().getTime(); |
| 59 | + responseCallbacks[callbackId] = responseCallback; |
| 60 | + message['callbackId'] = callbackId; |
| 61 | + } |
| 62 | + sendMessageQueue.push(message); |
| 63 | + messagingIframe.src = CUSTOM_PROTOCOL_SCHEME + '://' + QUEUE_HAS_MESSAGE; |
| 64 | + } |
| 65 | +
|
| 66 | + function _fetchQueue() { |
| 67 | + var messageQueueString = JSON.stringify(sendMessageQueue); |
| 68 | + sendMessageQueue = []; |
| 69 | + return messageQueueString; |
| 70 | + } |
| 71 | +
|
| 72 | + function _dispatchMessageFromiOS(messageJSON) { |
| 73 | + if (dispatchMessagesWithTimeoutSafety) { |
| 74 | + setTimeout(_doDispatchMessageFromiOS); |
| 75 | + } else { |
| 76 | + _doDispatchMessageFromiOS(); |
| 77 | + } |
| 78 | +
|
| 79 | + function _doDispatchMessageFromiOS() { |
| 80 | + var message = JSON.parse(messageJSON); |
| 81 | + var messageHandler; |
| 82 | + var responseCallback; |
| 83 | +
|
| 84 | + if (message.responseId) { |
| 85 | + responseCallback = responseCallbacks[message.responseId]; |
| 86 | + if (!responseCallback) { |
| 87 | + return; |
| 88 | + } |
| 89 | + responseCallback(message.responseData); |
| 90 | + delete responseCallbacks[message.responseId]; |
| 91 | + } else { |
| 92 | + if (message.callbackId) { |
| 93 | + var callbackResponseId = message.callbackId; |
| 94 | + responseCallback = function(responseData) { |
| 95 | + _doSend({ handlerName:message.handlerName, responseId:callbackResponseId, responseData:responseData }); |
| 96 | + }; |
| 97 | + } |
| 98 | +
|
| 99 | + var handler = messageHandlers[message.handlerName]; |
| 100 | + if (!handler) { |
| 101 | + console.log("WKWebViewJavascriptBridge: WARNING: no handler for message from ObjC:", message); |
| 102 | + } else { |
| 103 | + handler(message.data, responseCallback); |
| 104 | + } |
| 105 | + } |
| 106 | + } |
| 107 | + } |
| 108 | +
|
| 109 | + function _handleMessageFromiOS(messageJSON) { |
| 110 | + _dispatchMessageFromiOS(messageJSON); |
| 111 | + } |
| 112 | +
|
| 113 | + messagingIframe = document.createElement('iframe'); |
| 114 | + messagingIframe.style.display = 'none'; |
| 115 | + messagingIframe.src = CUSTOM_PROTOCOL_SCHEME + '://' + QUEUE_HAS_MESSAGE; |
| 116 | + document.documentElement.appendChild(messagingIframe); |
| 117 | +
|
| 118 | + registerHandler("_disableJavascriptAlertBoxSafetyTimeout", disableJavscriptAlertBoxSafetyTimeout); |
| 119 | +
|
| 120 | + setTimeout(_callWVJBCallbacks, 0); |
| 121 | + function _callWVJBCallbacks() { |
| 122 | + var callbacks = window.WVJBCallbacks; |
| 123 | + delete window.WVJBCallbacks; |
| 124 | + for (var i=0; i<callbacks.length; i++) { |
| 125 | + callbacks[i](WKWebViewJavascriptBridge); |
| 126 | + } |
| 127 | + } |
| 128 | +})(); |
| 129 | +""" |
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