CCWebView.js

/****************************************************************************
 Copyright (c) 2013-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

 https://www.cocos.com/

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated engine source code (the "Software"), a limited,
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 Xiamen Yaji Software Co., Ltd. reserves all rights not expressly granted to you.

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const WebViewImpl = require('./webview-impl');

/**
 * !#en WebView event type
 * !#zh 网页视图事件类型
 * @enum WebView.EventType
 */
const EventType = WebViewImpl.EventType;


/**
 * !#en Web page Load completed.
 * !#zh  网页加载完成
 * @property {String} LOADED
 */

/**
 * !#en Web page is loading.
 * !#zh  网页加载中
 * @property {String} LOADING
 */

/**
 * !#en Web page error occurs when loading.
 * !#zh  网页加载出错
 * @property {String} ERROR
 */

//
function emptyCallback () { }

/**
 * !#en cc.WebView is a component for display web pages in the game. Because different platforms have different authorization, API and control methods for WebView component. And have not yet formed a unified standard, only Web, iOS, and Android platforms are currently supported.
 * !#zh WebView 组件，用于在游戏中显示网页。由于不同平台对于 WebView 组件的授权、API、控制方式都不同，还没有形成统一的标准，所以目前只支持 Web、iOS 和 Android 平台。
 * @class WebView
 * @extends Component
 */
let WebView = cc.Class({
    name: 'cc.WebView',
    extends: cc.Component,

    editor: CC_EDITOR && {
        menu: 'i18n:MAIN_MENU.component.ui/WebView',
        help: 'i18n:COMPONENT.help_url.webview',
        executeInEditMode: true
    },

    properties: {
        _url: '',
        /**
         * !#en A given URL to be loaded by the WebView, it should have a http or https prefix.
         * !#zh 指定 WebView 加载的网址，它应该是一个 http 或者 https 开头的字符串
         * @property {String} url
         */
        url: {
            type: cc.String,
            tooltip: CC_DEV && 'i18n:COMPONENT.webview.url',
            get: function () {
                return this._url;
            },
            set: function (url) {
                this._url = url;
                let impl = this._impl;
                if (impl) {
                    impl.loadURL(url);
                }
            }
        },

        /**
         * !#en The webview's event callback , it will be triggered when certain webview event occurs.
         * !#zh WebView 的回调事件，当网页加载过程中，加载完成后或者加载出错时都会回调此函数
         * @property {Component.EventHandler[]} webviewLoadedEvents
         */
        webviewEvents: {
            default: [],
            type: cc.Component.EventHandler,
        },
    },

    statics: {
        EventType: EventType,
        // Impl will be overrided in the different platform.
        Impl: WebViewImpl
    },

    ctor () {
        this._impl = new WebView.Impl();
    },

    onRestore () {
        if (!this._impl) {
            this._impl = new WebView.Impl();
        }
    },

    onEnable () {
        let impl = this._impl;
        impl.createDomElementIfNeeded(this.node.width, this.node.height);
        if (!CC_EDITOR) {
            impl.setEventListener(EventType.LOADED, this._onWebViewLoaded.bind(this));
            impl.setEventListener(EventType.LOADING, this._onWebViewLoading.bind(this));
            impl.setEventListener(EventType.ERROR, this._onWebViewLoadError.bind(this));
        }
        impl.loadURL(this._url);
        impl.setVisible(true);
    },

    onDisable () {
        let impl = this._impl;
        impl.setVisible(false);
        if (!CC_EDITOR) {
            impl.setEventListener(EventType.LOADED, emptyCallback);
            impl.setEventListener(EventType.LOADING, emptyCallback);
            impl.setEventListener(EventType.ERROR, emptyCallback);
        }
    },

    onDestroy () {
        if (this._impl) {
            this._impl.destroy();
            this._impl = null;
        }
    },

    update (dt) {
        if (this._impl) {
            this._impl.updateMatrix(this.node);
        }
    },

    _onWebViewLoaded () {
        cc.Component.EventHandler.emitEvents(this.webviewEvents, this, EventType.LOADED);
        this.node.emit('loaded', this);
    },

    _onWebViewLoading () {
        cc.Component.EventHandler.emitEvents(this.webviewEvents, this, EventType.LOADING);
        this.node.emit('loading', this);
        return true;
    },

    _onWebViewLoadError () {
        cc.Component.EventHandler.emitEvents(this.webviewEvents, this, EventType.ERROR);
        this.node.emit('error', this);
    },

    /**
     * !#en
     * Set javascript interface scheme (see also setOnJSCallback). <br/>
     * Note: Supports only on the Android and iOS. For HTML5, please refer to the official documentation.<br/>
     * Please refer to the official documentation for more details.
     * !#zh
     * 设置 JavaScript 接口方案（与 'setOnJSCallback' 配套使用）。<br/>
     * 注意：只支持 Android 和 iOS ，Web 端用法请前往官方文档查看。<br/>
     * 详情请参阅官方文档
     * @method setJavascriptInterfaceScheme
     * @param {String} scheme
     */
    setJavascriptInterfaceScheme (scheme) {
        if (this._impl) {
            this._impl.setJavascriptInterfaceScheme(scheme);
        }
    },

    /**
     * !#en
     * This callback called when load URL that start with javascript
     * interface scheme (see also setJavascriptInterfaceScheme). <br/>
     * Note: Supports only on the Android and iOS. For HTML5, please refer to the official documentation.<br/>
     * Please refer to the official documentation for more details.
     * !#zh
     * 当加载 URL 以 JavaScript 接口方案开始时调用这个回调函数。<br/>
     * 注意：只支持 Android 和 iOS，Web 端用法请前往官方文档查看。
     * 详情请参阅官方文档
     * @method setOnJSCallback
     * @param {Function} callback
     */
    setOnJSCallback (callback) {
        if (this._impl) {
            this._impl.setOnJSCallback(callback);
        }
    },

    /**
     * !#en
     * Evaluates JavaScript in the context of the currently displayed page. <br/>
     * Please refer to the official document for more details <br/>
     * Note: Cross domain issues need to be resolved by yourself <br/>
     * !#zh
     * 执行 WebView 内部页面脚本（详情请参阅官方文档） <br/>
     * 注意：需要自行解决跨域问题
     * @method evaluateJS
     * @param {String} str
     */
    evaluateJS (str) {
        if (this._impl) {
            this._impl.evaluateJS(str);
        }
    },

});

cc.WebView = module.exports = WebView;
/**
 * !#en
 * Note: This event is emitted from the node to which the component belongs.
 * !#zh
 * 注意：此事件是从该组件所属的 Node 上面派发出来的，需要用 node.on 来监听。
 * @event loaded
 * @param {Event.EventCustom} event
 * @param {WebView} webView - The WebView component.
 */

/**
 * !#en
 * Note: This event is emitted from the node to which the component belongs.
 * !#zh
 * 注意：此事件是从该组件所属的 Node 上面派发出来的，需要用 node.on 来监听。
 * @event loading
 * @param {Event.EventCustom} event
 * @param {WebView} webView - The WebView component.
 */

/**
 * !#en
 * Note: This event is emitted from the node to which the component belongs.
 * !#zh
 * 注意：此事件是从该组件所属的 Node 上面派发出来的，需要用 node.on 来监听。
 * @event error
 * @param {Event.EventCustom} event
 * @param {WebView} webView - The WebView component.
 */

/**
 * !#en if you don't need the WebView and it isn't in any running Scene, you should
 * call the destroy method on this component or the associated node explicitly.
 * Otherwise, the created DOM element won't be removed from web page.
 * !#zh
 * 如果你不再使用 WebView，并且组件未添加到场景中，那么你必须手动对组件或所在节点调用 destroy。
 * 这样才能移除网页上的 DOM 节点，避免 Web 平台内存泄露。
 * @example
 * webview.node.parent = null;  // or  webview.node.removeFromParent(false);
 * // when you don't need webview anymore
 * webview.node.destroy();
 * @method destroy
 * @return {Boolean} whether it is the first time the destroy being called
 */