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Diffstat (limited to '')
-rw-r--r-- | browser/components/sessionstore/TabAttributes.sys.mjs | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/browser/components/sessionstore/TabAttributes.sys.mjs b/browser/components/sessionstore/TabAttributes.sys.mjs new file mode 100644 index 0000000000..1c7f54b6ab --- /dev/null +++ b/browser/components/sessionstore/TabAttributes.sys.mjs @@ -0,0 +1,72 @@ +/* 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/. */ + +// 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. +const ATTRIBUTES_TO_SKIP = new Set([ + "image", + "muted", + "pending", + "skipbackgroundnotify", +]); + +// 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. +export var TabAttributes = Object.freeze({ + persist(name) { + return TabAttributesInternal.persist(name); + }, + + get(tab) { + return TabAttributesInternal.get(tab); + }, + + set(tab, data = {}) { + TabAttributesInternal.set(tab, data); + }, +}); + +var TabAttributesInternal = { + _attrs: new Set(), + + persist(name) { + if (this._attrs.has(name) || ATTRIBUTES_TO_SKIP.has(name)) { + return false; + } + + this._attrs.add(name); + return true; + }, + + get(tab) { + let data = {}; + + for (let name of this._attrs) { + if (tab.hasAttribute(name)) { + data[name] = tab.getAttribute(name); + } + } + + return data; + }, + + set(tab, data = {}) { + // Clear attributes. + for (let name of this._attrs) { + tab.removeAttribute(name); + } + + // Set attributes. + for (let [name, value] of Object.entries(data)) { + if (!ATTRIBUTES_TO_SKIP.has(name)) { + tab.setAttribute(name, value); + } + } + }, +}; |