The Tor Browser: browser/components/sessionstore/src/TabAttributes.jsm@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

     3  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 "use strict";

     7 this.EXPORTED_SYMBOLS = ["TabAttributes"];

     9 // A set of tab attributes to persist. We will read a given list of tab

    10 // attributes when collecting tab data and will re-set those attributes when

    11 // the given tab data is restored to a new tab.

    12 this.TabAttributes = Object.freeze({

    13   persist: function (name) {

    14     return TabAttributesInternal.persist(name);

    15   },

    17   get: function (tab) {

    18     return TabAttributesInternal.get(tab);

    19   },

    21   set: function (tab, data = {}) {

    22     TabAttributesInternal.set(tab, data);

    23   }

    24 });

    26 let TabAttributesInternal = {

    27   _attrs: new Set(),

    29   // We never want to directly read or write those attributes.

    30   // 'image' should not be accessed directly but handled by using the

    31   //         gBrowser.getIcon()/setIcon() methods.

    32   // 'pending' is used internal by sessionstore and managed accordingly.

    33   _skipAttrs: new Set(["image", "pending"]),

    35   persist: function (name) {

    36     if (this._attrs.has(name) || this._skipAttrs.has(name)) {

    37       return false;

    38     }

    40     this._attrs.add(name);

    41     return true;

    42   },

    44   get: function (tab) {

    45     let data = {};

    47     for (let name of this._attrs) {

    48       if (tab.hasAttribute(name)) {

    49         data[name] = tab.getAttribute(name);

    50       }

    51     }

    53     return data;

    54   },

    56   set: function (tab, data = {}) {

    57     // Clear attributes.

    58     for (let name of this._attrs) {

    59       tab.removeAttribute(name);

    60     }

    62     // Set attributes.

    63     for (let name in data) {

    64       tab.setAttribute(name, data[name]);

    65     }

    66   }

    67 };

The Tor Browser / file revision