74 lines
2.0 KiB
JavaScript
74 lines
2.0 KiB
JavaScript
/* 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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this.EXPORTED_SYMBOLS = ["TabAttributes"];
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// A set of tab attributes to persist. We will read a given list of tab
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// attributes when collecting tab data and will re-set those attributes when
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// the given tab data is restored to a new tab.
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this.TabAttributes = Object.freeze({
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persist: function (name) {
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return TabAttributesInternal.persist(name);
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},
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get: function (tab) {
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return TabAttributesInternal.get(tab);
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},
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set: function (tab, data = {}) {
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TabAttributesInternal.set(tab, data);
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}
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});
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var TabAttributesInternal = {
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_attrs: new Set(),
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// We never want to directly read or write those attributes.
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// 'image' should not be accessed directly but handled by using the
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// gBrowser.getIcon()/setIcon() methods.
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// 'muted' should not be accessed directly but handled by using the
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// tab.linkedBrowser.audioMuted/toggleMuteAudio methods.
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// 'pending' is used internal by sessionstore and managed accordingly.
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// 'skipbackgroundnotify' is used to speed up startup time (bug 1342849).
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_skipAttrs: new Set(["image", "muted", "pending", "skipbackgroundnotify"]),
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persist: function (name) {
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if (this._attrs.has(name) || this._skipAttrs.has(name)) {
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return false;
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}
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this._attrs.add(name);
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return true;
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},
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get: function (tab) {
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let data = {};
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for (let name of this._attrs) {
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if (tab.hasAttribute(name)) {
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data[name] = tab.getAttribute(name);
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}
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}
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return data;
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},
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set: function (tab, data = {}) {
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// Clear attributes.
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for (let name of this._attrs) {
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tab.removeAttribute(name);
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}
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// Set attributes.
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for (let name in data) {
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if (!this._skipAttrs.has(name)) {
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tab.setAttribute(name, data[name]);
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}
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}
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}
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};
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