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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 = ["TabState"];
const Cu = Components.utils;
Cu.import("resource://gre/modules/XPCOMUtils.jsm", this);
XPCOMUtils.defineLazyModuleGetter(this, "PrivacyFilter",
"resource:///modules/sessionstore/PrivacyFilter.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "TabStateCache",
"resource:///modules/sessionstore/TabStateCache.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "TabAttributes",
"resource:///modules/sessionstore/TabAttributes.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "Utils",
"resource://gre/modules/sessionstore/Utils.jsm");
/**
* Module that contains tab state collection methods.
*/
this.TabState = Object.freeze({
update: function (browser, data) {
TabStateInternal.update(browser, data);
},
collect: function (tab) {
return TabStateInternal.collect(tab);
},
clone: function (tab) {
return TabStateInternal.clone(tab);
},
copyFromCache(browser, tabData, options) {
TabStateInternal.copyFromCache(browser, tabData, options);
},
});
var TabStateInternal = {
/**
* Processes a data update sent by the content script.
*/
update: function (browser, {data}) {
TabStateCache.update(browser, data);
},
/**
* Collect data related to a single tab, synchronously.
*
* @param tab
* tabbrowser tab
*
* @returns {TabData} An object with the data for this tab. If the
* tab has not been invalidated since the last call to
* collect(aTab), the same object is returned.
*/
collect: function (tab) {
return this._collectBaseTabData(tab);
},
/**
* Collect data related to a single tab, including private data.
* Use with caution.
*
* @param tab
* tabbrowser tab
*
* @returns {object} An object with the data for this tab. This data is never
* cached, it will always be read from the tab and thus be
* up-to-date.
*/
clone: function (tab) {
return this._collectBaseTabData(tab, {includePrivateData: true});
},
/**
* Collects basic tab data for a given tab.
*
* @param tab
* tabbrowser tab
* @param options (object)
* {includePrivateData: true} to always include private data
*
* @returns {object} An object with the basic data for this tab.
*/
_collectBaseTabData: function (tab, options) {
let tabData = { entries: [], lastAccessed: tab.lastAccessed };
let browser = tab.linkedBrowser;
if (tab.pinned) {
tabData.pinned = true;
}
tabData.hidden = tab.hidden;
if (browser.audioMuted) {
tabData.muted = true;
tabData.muteReason = tab.muteReason;
}
// Save tab attributes.
tabData.attributes = TabAttributes.get(tab);
if (tab.__SS_extdata) {
tabData.extData = tab.__SS_extdata;
}
// Copy data from the tab state cache only if the tab has fully finished
// restoring. We don't want to overwrite data contained in __SS_data.
this.copyFromCache(browser, tabData, options);
// After copyFromCache() was called we check for properties that are kept
// in the cache only while the tab is pending or restoring. Once that
// happened those properties will be removed from the cache and will
// be read from the tab/browser every time we collect data.
// Store the tab icon.
if (!("image" in tabData)) {
let tabbrowser = tab.ownerGlobal.gBrowser;
tabData.image = tabbrowser.getIcon(tab);
}
// Store the serialized contentPrincipal of this tab to use for the icon.
if (!("iconLoadingPrincipal" in tabData)) {
tabData.iconLoadingPrincipal = Utils.serializePrincipal(browser.contentPrincipal);
}
// If there is a userTypedValue set, then either the user has typed something
// in the URL bar, or a new tab was opened with a URI to load.
// If so, we also track whether we were still in the process of loading something.
if (!("userTypedValue" in tabData) && browser.userTypedValue) {
tabData.userTypedValue = browser.userTypedValue;
// We always used to keep track of the loading state as an integer, where
// '0' indicated the user had typed since the last load (or no load was
// ongoing), and any positive value indicated we had started a load since
// the last time the user typed in the URL bar. Mimic this to keep the
// session store representation in sync, even though we now represent this
// more explicitly:
tabData.userTypedClear = browser.didStartLoadSinceLastUserTyping() ? 1 : 0;
}
return tabData;
},
/**
* Copy data for the given |browser| from the cache to |tabData|.
*
* @param browser (xul:browser)
* The browser belonging to the given |tabData| object.
* @param tabData (object)
* The tab data belonging to the given |tab|.
* @param options (object)
* {includePrivateData: true} to always include private data
*/
copyFromCache(browser, tabData, options = {}) {
let data = TabStateCache.get(browser);
if (!data) {
return;
}
// The caller may explicitly request to omit privacy checks.
let includePrivateData = options && options.includePrivateData;
let isPinned = !!tabData.pinned;
for (let key of Object.keys(data)) {
let value = data[key];
// Filter sensitive data according to the current privacy level.
if (!includePrivateData) {
if (key === "storage") {
value = PrivacyFilter.filterSessionStorageData(value);
} else if (key === "formdata") {
value = PrivacyFilter.filterFormData(value);
}
}
if (key === "history") {
// Make a shallow copy of the entries array. We (currently) don't update
// entries in place, so we don't have to worry about performing a deep
// copy.
tabData.entries = [...value.entries];
if (value.hasOwnProperty("userContextId")) {
tabData.userContextId = value.userContextId;
}
if (value.hasOwnProperty("index")) {
tabData.index = value.index;
}
} else {
tabData[key] = value;
}
}
}
};
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