зеркало из https://github.com/mozilla/gecko-dev.git
88 строки
2.2 KiB
JavaScript
88 строки
2.2 KiB
JavaScript
/* vim: set ts=2 sw=2 sts=2 et tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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var EXPORTED_SYMBOLS = ["UAWidgetsChild"];
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ChromeUtils.import("resource://gre/modules/ActorChild.jsm");
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ChromeUtils.import("resource://gre/modules/Services.jsm");
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class UAWidgetsChild extends ActorChild {
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constructor(mm) {
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super(mm);
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this.widgets = new WeakMap();
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}
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handleEvent(aEvent) {
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switch (aEvent.type) {
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case "UAWidgetBindToTree":
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case "UAWidgetAttributeChanged":
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this.setupOrNotifyWidget(aEvent.target);
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break;
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case "UAWidgetUnbindFromTree":
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this.teardownWidget(aEvent.target);
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break;
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}
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}
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setupOrNotifyWidget(aElement) {
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let widget = this.widgets.get(aElement);
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if (!widget) {
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this.setupWidget(aElement);
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return;
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}
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if (typeof widget.wrappedJSObject.onattributechange == "function") {
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widget.wrappedJSObject.onattributechange();
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}
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}
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setupWidget(aElement) {
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let uri;
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let widgetName;
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switch (aElement.localName) {
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case "video":
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case "audio":
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uri = "chrome://global/content/elements/videocontrols.js";
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widgetName = "VideoControlsPageWidget";
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break;
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case "input":
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// TODO (datetimebox)
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break;
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case "applet":
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case "embed":
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case "object":
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// TODO (pluginProblems)
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break;
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}
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if (!uri || !widgetName) {
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return;
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}
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let shadowRoot = aElement.openOrClosedShadowRoot;
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let sandbox = aElement.nodePrincipal.isSystemPrincipal ?
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Object.create(null) : Cu.getUAWidgetScope(aElement.nodePrincipal);
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if (!sandbox[widgetName]) {
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Services.scriptloader.loadSubScript(uri, sandbox, "UTF-8");
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}
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let widget = new sandbox[widgetName](shadowRoot);
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this.widgets.set(aElement, widget);
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}
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teardownWidget(aElement) {
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let widget = this.widgets.get(aElement);
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if (!widget) {
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return;
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}
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if (typeof widget.wrappedJSObject.destructor == "function") {
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widget.wrappedJSObject.destructor();
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}
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this.widgets.delete(aElement);
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}
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}
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