1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/browser/components/sessionstore/src/TabAttributes.jsm Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,68 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +"use strict";
1.9 +
1.10 +this.EXPORTED_SYMBOLS = ["TabAttributes"];
1.11 +
1.12 +// A set of tab attributes to persist. We will read a given list of tab
1.13 +// attributes when collecting tab data and will re-set those attributes when
1.14 +// the given tab data is restored to a new tab.
1.15 +this.TabAttributes = Object.freeze({
1.16 + persist: function (name) {
1.17 + return TabAttributesInternal.persist(name);
1.18 + },
1.19 +
1.20 + get: function (tab) {
1.21 + return TabAttributesInternal.get(tab);
1.22 + },
1.23 +
1.24 + set: function (tab, data = {}) {
1.25 + TabAttributesInternal.set(tab, data);
1.26 + }
1.27 +});
1.28 +
1.29 +let TabAttributesInternal = {
1.30 + _attrs: new Set(),
1.31 +
1.32 + // We never want to directly read or write those attributes.
1.33 + // 'image' should not be accessed directly but handled by using the
1.34 + // gBrowser.getIcon()/setIcon() methods.
1.35 + // 'pending' is used internal by sessionstore and managed accordingly.
1.36 + _skipAttrs: new Set(["image", "pending"]),
1.37 +
1.38 + persist: function (name) {
1.39 + if (this._attrs.has(name) || this._skipAttrs.has(name)) {
1.40 + return false;
1.41 + }
1.42 +
1.43 + this._attrs.add(name);
1.44 + return true;
1.45 + },
1.46 +
1.47 + get: function (tab) {
1.48 + let data = {};
1.49 +
1.50 + for (let name of this._attrs) {
1.51 + if (tab.hasAttribute(name)) {
1.52 + data[name] = tab.getAttribute(name);
1.53 + }
1.54 + }
1.55 +
1.56 + return data;
1.57 + },
1.58 +
1.59 + set: function (tab, data = {}) {
1.60 + // Clear attributes.
1.61 + for (let name of this._attrs) {
1.62 + tab.removeAttribute(name);
1.63 + }
1.64 +
1.65 + // Set attributes.
1.66 + for (let name in data) {
1.67 + tab.setAttribute(name, data[name]);
1.68 + }
1.69 + }
1.70 +};
1.71 +
