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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
this.EXPORTED_SYMBOLS = ["TabAttributes"];
// We never want to directly read or write these attributes.
// 'image' should not be accessed directly but handled by using the
// gBrowser.getIcon()/setIcon() methods.
// 'muted' should not be accessed directly but handled by using the
// tab.linkedBrowser.audioMuted/toggleMuteAudio methods.
// 'pending' is used internal by sessionstore and managed accordingly.
// 'iconLoadingPrincipal' is same as 'image' that it should be handled by
// using the gBrowser.getIcon()/setIcon() methods.
const ATTRIBUTES_TO_SKIP = new Set(["image", "muted", "pending", "iconLoadingPrincipal"]);
// A set of tab attributes to persist. We will read a given list of tab
// attributes when collecting tab data and will re-set those attributes when
// the given tab data is restored to a new tab.
this.TabAttributes = Object.freeze({
persist: function (name) {
return TabAttributesInternal.persist(name);
},
get: function (tab) {
return TabAttributesInternal.get(tab);
},
set: function (tab, data = {}) {
TabAttributesInternal.set(tab, data);
}
});
var TabAttributesInternal = {
_attrs: new Set(),
persist: function (name) {
if (this._attrs.has(name) || ATTRIBUTES_TO_SKIP.has(name)) {
return false;
}
this._attrs.add(name);
return true;
},
get: function (tab) {
let data = {};
for (let name of this._attrs) {
if (tab.hasAttribute(name)) {
data[name] = tab.getAttribute(name);
}
}
return data;
},
set: function (tab, data = {}) {
// Clear attributes.
for (let name of this._attrs) {
tab.removeAttribute(name);
}
// Set attributes.
for (let name in data) {
if (!ATTRIBUTES_TO_SKIP.has(name)) {
tab.setAttribute(name, data[name]);
}
}
}
};
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