lib/client/emulatorBridge.js

/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 */
var platform = ripple('platform'),
    builder = ripple('platform/builder'),
    utils = ripple('utils'),
    _xhr, _win, _doc;

function _getEmulatedViewportStyle(attr) {
    var vp = document.getElementById("viewport-container");
    return vp["client" + attr];
}

function _screenAvailWidth() {
    return _getEmulatedViewportStyle("Width");
}

function _screenAvailHeight() {
    return _getEmulatedViewportStyle("Height");
}

function _screenWidth() {
    return _getEmulatedViewportStyle("Width");
}

function _screenHeight() {
    return _getEmulatedViewportStyle("Height");
}

function _window_innerWidth() {
    return _getEmulatedViewportStyle("Width");
}

function _window_innerHeight() {
    return _getEmulatedViewportStyle("Height");
}

function _marshalScreen(win) {
    utils.forEach({
        "availWidth": _screenAvailWidth,
        "availHeight": _screenAvailHeight,
        "width": _screenWidth,
        "height": _screenHeight
    }, function (mappedFunc, prop) {
        win.screen.__defineGetter__(prop, mappedFunc);
    });

    utils.forEach({
        "innerWidth": _window_innerWidth,
        "innerHeight": _window_innerHeight
    }, function (mappedFunc, prop) {
        win.__defineGetter__(prop, mappedFunc);
    });
}

module.exports = {
    init: function  (win, doc) {
        _win = win;
        _doc = doc;
        _xhr = win.XMLHttpRequest;

        function marshal(obj, key) {
            // Use defineProperty, otherwise we won't be able to override built-in read-only properties.
            Object.defineProperty(window, key, {
                value: obj, configurable: true, enumerable: true
            });
            Object.defineProperty(win, key, {
                value: obj, configurable: true, enumerable: true
            });
        }

        var currentPlatform = platform.current(),
            sandbox         = {};

        marshal(window.tinyHippos, "tinyHippos");
        marshal(window.XMLHttpRequest, "XMLHttpRequest");

        if (currentPlatform.initialize) {
            currentPlatform.initialize(win);
        }

        builder.build(platform.current().objects).into(sandbox);
        utils.forEach(sandbox, marshal);

        _marshalScreen(win);
        _marshalScreen(window);
    },

    document: function () {
        return _doc;
    },

    window: function () {
        return _win;
    },

    xhr: function () {
        return _xhr;
    }
};