cocos-enhance-kit/jsb-adapter/engine/jsb-webview.js

/****************************************************************************
 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,
 worldwide, royalty-free, non-assignable, revocable and non-exclusive license
 to use Cocos Creator solely to develop games on your target platforms. You shall
 not use Cocos Creator software for developing other software or tools that's
 used for developing games. You are not granted to publish, distribute,
 sublicense, and/or sell copies of Cocos Creator.

 The software or tools in this License Agreement are licensed, not sold.
 Xiamen Yaji Software Co., Ltd. reserves all rights not expressly granted to you.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ****************************************************************************/


(function () {
    if (!(cc && cc.WebView && cc.WebView.Impl)) {
        return;
    }

    var vec3 = cc.Vec3;
    var _worldMat = new cc.Mat4();

    var _topLeft = new vec3();
    var _bottomRight = new vec3();

    cc.WebView.Impl = cc.Class({
        extends: cc.WebView.Impl,
        ctor () {
            // keep webview data
            this.jsCallback = null;
            this.interfaceSchema = null;
        }
    });
    var _impl = cc.WebView.Impl;
    var _p = cc.WebView.Impl.prototype;

    _p._updateVisibility = function () {
        if (!this._iframe) return;
        this._iframe.setVisible(this._visible);
    };
    _p._updateSize = function (w, h) {

    };
    _p._initEvent = function () {
        let iframe = this._iframe;
        if (iframe) {
            let cbs = this.__eventListeners,
                self = this;
            cbs.load = function () {
                self._dispatchEvent(_impl.EventType.LOADED);
            };
            cbs.error = function () {
                self._dispatchEvent(_impl.EventType.ERROR);
            };
            // native event callback
            this._iframe.setOnDidFinishLoading(cbs.load);
            this._iframe.setOnDidFailLoading(cbs.error);
        }
    };
    _p._initExtraSetting = function () {
        this.jsCallback && this.setOnJSCallback(this.jsCallback);
        this.interfaceSchema && this.setJavascriptInterfaceScheme(this.interfaceSchema);
        // remove obj
        this.jsCallback = null;
        this.interfaceSchema = null;
    };
    _p._setOpacity = function (opacity) {
        let iframe = this._iframe;
        if (iframe && iframe.style) {
            iframe.style.opacity = opacity / 255;
            // TODO, add impl to Native
        }
    };
    _p.createDomElementIfNeeded = function (w, h) {
        if (!jsb.WebView) {
            cc.warn('WebView only supports mobile platform.');
            return;
        }
        if (!this._iframe){
            this._iframe = jsb.WebView.create();
            this._initEvent();
            this._initExtraSetting();
        }
    };
    _p.removeDom = function () {
        let iframe = this._iframe;
        if (iframe) {
            let cbs = this.__eventListeners;
            cbs.load = null;
            cbs.error = null;
            iframe.destroy();
            this._iframe = null;
        }
    };

    _p.setOnJSCallback = function (callback) {
        let iframe = this._iframe;
        if (iframe) {
            iframe.setOnJSCallback(callback);
        }
        else {
            this.jsCallback = callback;
        }
    };
    _p.setJavascriptInterfaceScheme = function (scheme) {
        let iframe = this._iframe;
        if (iframe) {
            iframe.setJavascriptInterfaceScheme(scheme);
        }
        else {
            this.interfaceSchema = scheme;
        }
    };
    _p.loadData = function (data, MIMEType, encoding, baseURL) {
        let iframe = this._iframe;
        if (iframe) {
            iframe.loadData(data, MIMEType, encoding, baseURL);
        }
    };
    _p.loadHTMLString = function (string, baseURL) {
        let iframe = this._iframe;
        if (iframe) {
            iframe.loadHTMLString(string, baseURL);
        }
    };
    /**
     * Load an URL
     * @param {String} url
     */
    _p.loadURL = function (url) {
        let iframe = this._iframe;
        if (iframe) {
            iframe.src = url;
            iframe.loadURL(url);
            this._dispatchEvent(_impl.EventType.LOADING);
        }
    };
    /**
     * Stop loading
     */
    _p.stopLoading = function () {
        cc.logID(7800);
    };
    /**
     * Reload the WebView
     */
    _p.reload = function () {
        let iframe = this._iframe;
        if (iframe) {
            iframe.reload();
        }
    };
    /**
     * Determine whether to go back
     */
    _p.canGoBack = function () {
        let iframe = this._iframe;
        if (iframe) {
            return iframe.canGoBack();
        }
    };
    /**
     * Determine whether to go forward
     */
    _p.canGoForward = function () {
        let iframe = this._iframe;
        if (iframe) {
            return iframe.canGoForward();
        }
    };
    /**
     * go back
     */
    _p.goBack = function () {
        let iframe = this._iframe;
        if (iframe) {
            return iframe.goBack();
        }
    };
    /**
     * go forward
     */
    _p.goForward = function () {
        let iframe = this._iframe;
        if (iframe) {
            return iframe.goForward();
        }
    };
    /**
     * In the webview execution within a period of js string
     * @param {String} str
     */
    _p.evaluateJS = function (str) {
        let iframe = this._iframe;
        if (iframe) {
            return iframe.evaluateJS(str);
        }
    };
    /**
     * Limited scale
     */
    _p.setScalesPageToFit = function () {
        let iframe = this._iframe;
        if (iframe) {
            return iframe.setScalesPageToFit();
        }
    };
    /**
     * The binding event
     * @param {_impl.EventType} event
     * @param {Function} callback
     */
    _p.setEventListener = function (event, callback) {
        this._EventList[event] = callback;
    };
    /**
     * Delete events
     * @param {_impl.EventType} event
     */
    _p.removeEventListener = function (event) {
        this._EventList[event] = null;
    };
    _p._dispatchEvent = function (event) {
        let callback = this._EventList[event];
        if (callback)
            callback.call(this, this, this._iframe.src);
    };
    _p._createRenderCmd = function () {
        return new _impl.RenderCmd(this);
    };
    _p.destroy = function () {
        this.removeDom();
    };
    _p.setVisible = function (visible) {
        if (this._visible !== visible) {
            this._visible = !!visible;
            this._updateVisibility();
        }
    };
    _p.updateMatrix = function (node) {
        if (!this._iframe || !this._visible) return;
        let camera = cc.Camera.findCamera(node)._camera;
        if (!camera) {
            return;
        }
        
        node.getWorldMatrix(_worldMat);
        if (this._m00 === _worldMat.m[0] && this._m01 === _worldMat.m[1] &&
            this._m04 === _worldMat.m[4] && this._m05 === _worldMat.m[5] &&
            this._m12 === _worldMat.m[12] && this._m13 === _worldMat.m[13] &&
            this._w === node._contentSize.width && this._h === node._contentSize.height) {
            return;
        }
        // update matrix cache
        this._m00 = _worldMat.m[0];
        this._m01 = _worldMat.m[1];
        this._m04 = _worldMat.m[4];
        this._m05 = _worldMat.m[5];
        this._m12 = _worldMat.m[12];
        this._m13 = _worldMat.m[13];
        this._w = node._contentSize.width;
        this._h = node._contentSize.height;

        let canvas_width = cc.game.canvas.width;
        let canvas_height = cc.game.canvas.height;
        let ap = node._anchorPoint;
        // Vectors in node space
        vec3.set(_topLeft, - ap.x * this._w, (1.0 - ap.y) * this._h, 0);
        vec3.set(_bottomRight, (1 - ap.x) * this._w, - ap.y * this._h, 0);
        // Convert to world space
        vec3.transformMat4(_topLeft, _topLeft, _worldMat);
        vec3.transformMat4(_bottomRight, _bottomRight, _worldMat);
        // Convert to screen space
        camera.worldToScreen(_topLeft, _topLeft, canvas_width, canvas_height);
        camera.worldToScreen(_bottomRight, _bottomRight, canvas_width, canvas_height);

        let finalWidth = _bottomRight.x - _topLeft.x;
        let finalHeight = _topLeft.y - _bottomRight.y;
        this._iframe.setFrame(_topLeft.x, canvas_height - _topLeft.y, finalWidth, finalHeight);
    }
})();