forked from mirrors/gecko-dev
bfd7aeb85d
This patch creates the basic structure on how the widget scripts can be loaded and be pointed to the Shadow Root, from the UAWidgetsChild.jsm. The UAWidgetsClass class asks for a sandbox from Cu.getUAWidgetScope(), which calls into XPCJSRuntime::GetUAWidgetScope(). It creates and keeps the sandboxes, in a GCHashMap keyed to the origin, so we could reuse it if needed. MozReview-Commit-ID: J6W4PDQWMcN --HG-- extra : rebase_source : a62b0a22195f09cdb508df72c954e20d18c7bf68
87 lines
2.2 KiB
JavaScript
87 lines
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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