зеркало из https://github.com/mozilla/gecko-dev.git
676 строки
21 KiB
JavaScript
676 строки
21 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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var EXPORTED_SYMBOLS = ["ContentSearchParent", "ContentSearch"];
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const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
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const { XPCOMUtils } = ChromeUtils.import(
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"resource://gre/modules/XPCOMUtils.jsm"
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);
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XPCOMUtils.defineLazyGlobalGetters(this, ["XMLHttpRequest"]);
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XPCOMUtils.defineLazyModuleGetters(this, {
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BrowserSearchTelemetry: "resource:///modules/BrowserSearchTelemetry.jsm",
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FormHistory: "resource://gre/modules/FormHistory.jsm",
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PrivateBrowsingUtils: "resource://gre/modules/PrivateBrowsingUtils.jsm",
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SearchSuggestionController:
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"resource://gre/modules/SearchSuggestionController.jsm",
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UrlbarPrefs: "resource:///modules/UrlbarPrefs.jsm",
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});
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const MAX_LOCAL_SUGGESTIONS = 3;
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const MAX_SUGGESTIONS = 6;
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const SEARCH_ENGINE_PLACEHOLDER_ICON =
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"chrome://browser/skin/search-engine-placeholder.png";
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// Set of all ContentSearch actors, used to broadcast messages to all of them.
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let gContentSearchActors = new Set();
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/**
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* Inbound messages have the following types:
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*
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* AddFormHistoryEntry
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* Adds an entry to the search form history.
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* data: the entry, a string
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* GetSuggestions
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* Retrieves an array of search suggestions given a search string.
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* data: { engineName, searchString }
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* GetState
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* Retrieves the current search engine state.
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* data: null
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* GetStrings
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* Retrieves localized search UI strings.
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* data: null
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* ManageEngines
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* Opens the search engine management window.
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* data: null
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* RemoveFormHistoryEntry
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* Removes an entry from the search form history.
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* data: the entry, a string
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* Search
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* Performs a search.
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* Any GetSuggestions messages in the queue from the same target will be
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* cancelled.
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* data: { engineName, searchString, healthReportKey, searchPurpose }
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* SetCurrentEngine
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* Sets the current engine.
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* data: the name of the engine
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* SpeculativeConnect
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* Speculatively connects to an engine.
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* data: the name of the engine
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*
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* Outbound messages have the following types:
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*
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* CurrentEngine
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* Broadcast when the current engine changes.
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* data: see _currentEngineObj
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* CurrentState
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* Broadcast when the current search state changes.
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* data: see currentStateObj
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* State
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* Sent in reply to GetState.
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* data: see currentStateObj
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* Strings
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* Sent in reply to GetStrings
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* data: Object containing string names and values for the current locale.
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* Suggestions
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* Sent in reply to GetSuggestions.
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* data: see _onMessageGetSuggestions
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* SuggestionsCancelled
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* Sent in reply to GetSuggestions when pending GetSuggestions events are
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* cancelled.
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* data: null
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*/
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let ContentSearch = {
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initialized: false,
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// Inbound events are queued and processed in FIFO order instead of handling
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// them immediately, which would result in non-FIFO responses due to the
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// asynchrononicity added by converting image data URIs to ArrayBuffers.
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_eventQueue: [],
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_currentEventPromise: null,
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// This is used to handle search suggestions. It maps xul:browsers to objects
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// { controller, previousFormHistoryResult }. See _onMessageGetSuggestions.
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_suggestionMap: new WeakMap(),
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// Resolved when we finish shutting down.
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_destroyedPromise: null,
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// The current controller and browser in _onMessageGetSuggestions. Allows
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// fetch cancellation from _cancelSuggestions.
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_currentSuggestion: null,
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init() {
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if (!this.initialized) {
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Services.obs.addObserver(this, "browser-search-engine-modified");
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Services.obs.addObserver(this, "browser-search-service");
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Services.obs.addObserver(this, "shutdown-leaks-before-check");
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Services.prefs.addObserver("browser.search.hiddenOneOffs", this);
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UrlbarPrefs.addObserver(this);
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this.initialized = true;
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}
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},
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get searchSuggestionUIStrings() {
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if (this._searchSuggestionUIStrings) {
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return this._searchSuggestionUIStrings;
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}
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this._searchSuggestionUIStrings = {};
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let searchBundle = Services.strings.createBundle(
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"chrome://browser/locale/search.properties"
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);
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let stringNames = [
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"searchHeader",
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"searchForSomethingWith2",
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"searchWithHeader",
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"searchSettings",
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];
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for (let name of stringNames) {
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this._searchSuggestionUIStrings[name] = searchBundle.GetStringFromName(
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name
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);
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}
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return this._searchSuggestionUIStrings;
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},
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destroy() {
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if (!this.initialized) {
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return new Promise();
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}
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if (this._destroyedPromise) {
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return this._destroyedPromise;
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}
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Services.prefs.removeObserver("browser.search.hiddenOneOffs", this);
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Services.obs.removeObserver(this, "browser-search-engine-modified");
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Services.obs.removeObserver(this, "browser-search-service");
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Services.obs.removeObserver(this, "shutdown-leaks-before-check");
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this._eventQueue.length = 0;
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this._destroyedPromise = Promise.resolve(this._currentEventPromise);
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return this._destroyedPromise;
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},
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observe(subj, topic, data) {
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switch (topic) {
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case "browser-search-service":
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if (data != "init-complete") {
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break;
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}
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// fall through
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case "nsPref:changed":
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case "browser-search-engine-modified":
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this._eventQueue.push({
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type: "Observe",
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data,
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});
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this._processEventQueue();
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break;
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case "shutdown-leaks-before-check":
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subj.wrappedJSObject.client.addBlocker(
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"ContentSearch: Wait until the service is destroyed",
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() => this.destroy()
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);
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break;
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}
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},
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/**
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* Observes changes in prefs tracked by UrlbarPrefs.
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* @param {string} pref
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* The name of the pref, relative to `browser.urlbar.` if the pref is
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* in that branch.
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*/
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onPrefChanged(pref) {
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if (UrlbarPrefs.shouldHandOffToSearchModePrefs.includes(pref)) {
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this._eventQueue.push({
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type: "Observe",
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data: "shouldHandOffToSearchMode",
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});
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this._processEventQueue();
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}
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},
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removeFormHistoryEntry(browser, entry) {
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let browserData = this._suggestionDataForBrowser(browser);
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if (browserData && browserData.previousFormHistoryResult) {
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let { previousFormHistoryResult } = browserData;
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for (let i = 0; i < previousFormHistoryResult.matchCount; i++) {
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if (previousFormHistoryResult.getValueAt(i) === entry) {
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previousFormHistoryResult.removeValueAt(i);
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break;
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}
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}
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}
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},
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performSearch(actor, browser, data) {
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this._ensureDataHasProperties(data, [
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"engineName",
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"searchString",
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"healthReportKey",
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"searchPurpose",
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]);
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let engine = Services.search.getEngineByName(data.engineName);
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let submission = engine.getSubmission(
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data.searchString,
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"",
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data.searchPurpose
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);
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let win = browser.ownerGlobal;
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if (!win) {
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// The browser may have been closed between the time its content sent the
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// message and the time we handle it.
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return;
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}
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let where = win.whereToOpenLink(data.originalEvent);
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// There is a chance that by the time we receive the search message, the user
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// has switched away from the tab that triggered the search. If, based on the
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// event, we need to load the search in the same tab that triggered it (i.e.
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// where === "current"), openUILinkIn will not work because that tab is no
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// longer the current one. For this case we manually load the URI.
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if (where === "current") {
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// Since we're going to load the search in the same browser, blur the search
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// UI to prevent further interaction before we start loading.
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this._reply(actor, "Blur");
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browser.loadURI(submission.uri.spec, {
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postData: submission.postData,
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triggeringPrincipal: Services.scriptSecurityManager.createNullPrincipal(
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{
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userContextId: win.gBrowser.selectedBrowser.getAttribute(
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"userContextId"
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),
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}
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),
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});
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} else {
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let params = {
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postData: submission.postData,
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inBackground: Services.prefs.getBoolPref(
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"browser.tabs.loadInBackground"
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),
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};
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win.openTrustedLinkIn(submission.uri.spec, where, params);
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}
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BrowserSearchTelemetry.recordSearch(browser, engine, data.healthReportKey, {
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selection: data.selection,
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url: submission.uri,
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});
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},
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async getSuggestions(engineName, searchString, browser) {
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let engine = Services.search.getEngineByName(engineName);
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if (!engine) {
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throw new Error("Unknown engine name: " + engineName);
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}
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let browserData = this._suggestionDataForBrowser(browser, true);
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let { controller } = browserData;
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let ok = SearchSuggestionController.engineOffersSuggestions(engine);
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controller.maxLocalResults = ok ? MAX_LOCAL_SUGGESTIONS : MAX_SUGGESTIONS;
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controller.maxRemoteResults = ok ? MAX_SUGGESTIONS : 0;
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let priv = PrivateBrowsingUtils.isBrowserPrivate(browser);
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// fetch() rejects its promise if there's a pending request, but since we
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// process our event queue serially, there's never a pending request.
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this._currentSuggestion = { controller, browser };
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let suggestions = await controller.fetch(searchString, priv, engine);
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// Simplify results since we do not support rich results in this component.
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suggestions.local = suggestions.local.map(e => e.value);
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// We shouldn't show tail suggestions in their full-text form.
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let nonTailEntries = suggestions.remote.filter(
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e => !e.matchPrefix && !e.tail
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);
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suggestions.remote = nonTailEntries.map(e => e.value);
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this._currentSuggestion = null;
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// suggestions will be null if the request was cancelled
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let result = {};
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if (!suggestions) {
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return result;
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}
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// Keep the form history result so RemoveFormHistoryEntry can remove entries
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// from it. Keeping only one result isn't foolproof because the client may
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// try to remove an entry from one set of suggestions after it has requested
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// more but before it's received them. In that case, the entry may not
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// appear in the new suggestions. But that should happen rarely.
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browserData.previousFormHistoryResult = suggestions.formHistoryResult;
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result = {
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engineName,
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term: suggestions.term,
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local: suggestions.local,
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remote: suggestions.remote,
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};
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return result;
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},
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async addFormHistoryEntry(browser, entry = null) {
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let isPrivate = false;
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try {
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// isBrowserPrivate assumes that the passed-in browser has all the normal
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// properties, which won't be true if the browser has been destroyed.
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// That may be the case here due to the asynchronous nature of messaging.
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isPrivate = PrivateBrowsingUtils.isBrowserPrivate(browser);
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} catch (err) {
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return false;
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}
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if (
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isPrivate ||
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!entry ||
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entry.value.length >
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SearchSuggestionController.SEARCH_HISTORY_MAX_VALUE_LENGTH
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) {
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return false;
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}
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let browserData = this._suggestionDataForBrowser(browser, true);
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FormHistory.update(
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{
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op: "bump",
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fieldname: browserData.controller.formHistoryParam,
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value: entry.value,
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source: entry.engineName,
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},
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{
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handleCompletion: () => {},
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handleError: err => {
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Cu.reportError("Error adding form history entry: " + err);
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},
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}
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);
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return true;
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},
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async currentStateObj(window) {
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let state = {
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engines: [],
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currentEngine: await this._currentEngineObj(false),
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currentPrivateEngine: await this._currentEngineObj(true),
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};
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let pref = Services.prefs.getStringPref("browser.search.hiddenOneOffs");
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let hiddenList = pref ? pref.split(",") : [];
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for (let engine of await Services.search.getVisibleEngines()) {
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state.engines.push({
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name: engine.name,
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iconData: await this._getEngineIconURL(engine),
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hidden: hiddenList.includes(engine.name),
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isAppProvided: engine.isAppProvided,
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});
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}
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if (window) {
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state.isInPrivateBrowsingMode = PrivateBrowsingUtils.isContentWindowPrivate(
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window
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);
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state.isAboutPrivateBrowsing =
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window.gBrowser.currentURI.spec == "about:privatebrowsing";
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}
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return state;
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},
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_processEventQueue() {
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if (this._currentEventPromise || !this._eventQueue.length) {
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return;
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}
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let event = this._eventQueue.shift();
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this._currentEventPromise = (async () => {
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try {
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await this["_on" + event.type](event);
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} catch (err) {
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Cu.reportError(err);
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} finally {
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this._currentEventPromise = null;
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this._processEventQueue();
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}
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})();
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},
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_cancelSuggestions({ actor, browser }) {
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let cancelled = false;
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// cancel active suggestion request
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if (
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this._currentSuggestion &&
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this._currentSuggestion.browser === browser
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) {
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this._currentSuggestion.controller.stop();
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cancelled = true;
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}
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// cancel queued suggestion requests
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for (let i = 0; i < this._eventQueue.length; i++) {
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let m = this._eventQueue[i];
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if (actor === m.actor && m.name === "GetSuggestions") {
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this._eventQueue.splice(i, 1);
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cancelled = true;
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i--;
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}
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}
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if (cancelled) {
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this._reply(actor, "SuggestionsCancelled");
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}
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},
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async _onMessage(eventItem) {
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let methodName = "_onMessage" + eventItem.name;
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if (methodName in this) {
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await this._initService();
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await this[methodName](eventItem);
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eventItem.browser.removeEventListener("SwapDocShells", eventItem, true);
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}
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},
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_onMessageGetState({ actor, browser }) {
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return this.currentStateObj(browser.ownerGlobal).then(state => {
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this._reply(actor, "State", state);
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});
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},
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_onMessageGetEngine({ actor, browser }) {
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return this.currentStateObj(browser.ownerGlobal).then(state => {
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this._reply(actor, "Engine", {
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isPrivateEngine: state.isInPrivateBrowsingMode,
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isAboutPrivateBrowsing: state.isAboutPrivateBrowsing,
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engine: state.isInPrivateBrowsingMode
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? state.currentPrivateEngine
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: state.currentEngine,
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});
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});
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},
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_onMessageGetHandoffSearchModePrefs({ actor }) {
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this._reply(
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actor,
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"HandoffSearchModePrefs",
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UrlbarPrefs.get("shouldHandOffToSearchMode")
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);
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},
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_onMessageGetStrings({ actor }) {
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this._reply(actor, "Strings", this.searchSuggestionUIStrings);
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},
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_onMessageSearch({ actor, browser, data }) {
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this.performSearch(actor, browser, data);
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},
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_onMessageSetCurrentEngine({ data }) {
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Services.search.defaultEngine = Services.search.getEngineByName(data);
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},
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_onMessageManageEngines({ browser }) {
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browser.ownerGlobal.openPreferences("paneSearch");
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},
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async _onMessageGetSuggestions({ actor, browser, data }) {
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this._ensureDataHasProperties(data, ["engineName", "searchString"]);
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let { engineName, searchString } = data;
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let suggestions = await this.getSuggestions(
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engineName,
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searchString,
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browser
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);
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this._reply(actor, "Suggestions", {
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engineName: data.engineName,
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searchString: suggestions.term,
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formHistory: suggestions.local,
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remote: suggestions.remote,
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});
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},
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async _onMessageAddFormHistoryEntry({ browser, data: entry }) {
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await this.addFormHistoryEntry(browser, entry);
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},
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_onMessageRemoveFormHistoryEntry({ browser, data: entry }) {
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this.removeFormHistoryEntry(browser, entry);
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},
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_onMessageSpeculativeConnect({ browser, data: engineName }) {
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let engine = Services.search.getEngineByName(engineName);
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if (!engine) {
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throw new Error("Unknown engine name: " + engineName);
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}
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if (browser.contentWindow) {
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engine.speculativeConnect({
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window: browser.contentWindow,
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originAttributes: browser.contentPrincipal.originAttributes,
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});
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}
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},
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async _onObserve(eventItem) {
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let engine;
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switch (eventItem.data) {
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case "engine-default":
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engine = await this._currentEngineObj(false);
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this._broadcast("CurrentEngine", engine);
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break;
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case "engine-default-private":
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engine = await this._currentEngineObj(true);
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this._broadcast("CurrentPrivateEngine", engine);
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break;
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case "shouldHandOffToSearchMode":
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this._broadcast(
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"HandoffSearchModePrefs",
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UrlbarPrefs.get("shouldHandOffToSearchMode")
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);
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break;
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default:
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let state = await this.currentStateObj();
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this._broadcast("CurrentState", state);
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break;
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}
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},
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_suggestionDataForBrowser(browser, create = false) {
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let data = this._suggestionMap.get(browser);
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if (!data && create) {
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// Since one SearchSuggestionController instance is meant to be used per
|
|
// autocomplete widget, this means that we assume each xul:browser has at
|
|
// most one such widget.
|
|
data = {
|
|
controller: new SearchSuggestionController(),
|
|
};
|
|
this._suggestionMap.set(browser, data);
|
|
}
|
|
return data;
|
|
},
|
|
|
|
_reply(actor, type, data) {
|
|
actor.sendAsyncMessage(type, data);
|
|
},
|
|
|
|
_broadcast(type, data) {
|
|
for (let actor of gContentSearchActors) {
|
|
actor.sendAsyncMessage(type, data);
|
|
}
|
|
},
|
|
|
|
async _currentEngineObj(usePrivate) {
|
|
let engine =
|
|
Services.search[usePrivate ? "defaultPrivateEngine" : "defaultEngine"];
|
|
let obj = {
|
|
name: engine.name,
|
|
iconData: await this._getEngineIconURL(engine),
|
|
isAppProvided: engine.isAppProvided,
|
|
};
|
|
return obj;
|
|
},
|
|
|
|
/**
|
|
* Converts the engine's icon into an appropriate URL for display at
|
|
*/
|
|
async _getEngineIconURL(engine) {
|
|
let url = engine.getIconURLBySize(16, 16);
|
|
if (!url) {
|
|
return SEARCH_ENGINE_PLACEHOLDER_ICON;
|
|
}
|
|
|
|
// The uri received here can be of two types
|
|
// 1 - moz-extension://[uuid]/path/to/icon.ico
|
|
// 2 - data:image/x-icon;base64,VERY-LONG-STRING
|
|
//
|
|
// If the URI is not a data: URI, there's no point in converting
|
|
// it to an arraybuffer (which is used to optimize passing the data
|
|
// accross processes): we can just pass the original URI, which is cheaper.
|
|
if (!url.startsWith("data:")) {
|
|
return url;
|
|
}
|
|
|
|
return new Promise(resolve => {
|
|
let xhr = new XMLHttpRequest();
|
|
xhr.open("GET", url, true);
|
|
xhr.responseType = "arraybuffer";
|
|
xhr.onload = () => {
|
|
resolve(xhr.response);
|
|
};
|
|
xhr.onerror = xhr.onabort = xhr.ontimeout = () => {
|
|
resolve(SEARCH_ENGINE_PLACEHOLDER_ICON);
|
|
};
|
|
try {
|
|
// This throws if the URI is erroneously encoded.
|
|
xhr.send();
|
|
} catch (err) {
|
|
resolve(SEARCH_ENGINE_PLACEHOLDER_ICON);
|
|
}
|
|
});
|
|
},
|
|
|
|
_ensureDataHasProperties(data, requiredProperties) {
|
|
for (let prop of requiredProperties) {
|
|
if (!(prop in data)) {
|
|
throw new Error("Message data missing required property: " + prop);
|
|
}
|
|
}
|
|
},
|
|
|
|
_initService() {
|
|
if (!this._initServicePromise) {
|
|
this._initServicePromise = Services.search.init();
|
|
}
|
|
return this._initServicePromise;
|
|
},
|
|
};
|
|
|
|
class ContentSearchParent extends JSWindowActorParent {
|
|
constructor() {
|
|
super();
|
|
ContentSearch.init();
|
|
gContentSearchActors.add(this);
|
|
}
|
|
|
|
didDestroy() {
|
|
gContentSearchActors.delete(this);
|
|
}
|
|
|
|
receiveMessage(msg) {
|
|
// Add a temporary event handler that exists only while the message is in
|
|
// the event queue. If the message's source docshell changes browsers in
|
|
// the meantime, then we need to update the browser. event.detail will be
|
|
// the docshell's new parent <xul:browser> element.
|
|
let browser = this.browsingContext.top.embedderElement;
|
|
let eventItem = {
|
|
type: "Message",
|
|
name: msg.name,
|
|
data: msg.data,
|
|
browser,
|
|
actor: this,
|
|
handleEvent: event => {
|
|
let browserData = ContentSearch._suggestionMap.get(eventItem.browser);
|
|
if (browserData) {
|
|
ContentSearch._suggestionMap.delete(eventItem.browser);
|
|
ContentSearch._suggestionMap.set(event.detail, browserData);
|
|
}
|
|
browser.removeEventListener("SwapDocShells", eventItem, true);
|
|
eventItem.browser = event.detail;
|
|
eventItem.browser.addEventListener("SwapDocShells", eventItem, true);
|
|
},
|
|
};
|
|
browser.addEventListener("SwapDocShells", eventItem, true);
|
|
|
|
// Search requests cause cancellation of all Suggestion requests from the
|
|
// same browser.
|
|
if (msg.name === "Search") {
|
|
ContentSearch._cancelSuggestions(eventItem);
|
|
}
|
|
|
|
ContentSearch._eventQueue.push(eventItem);
|
|
ContentSearch._processEventQueue();
|
|
}
|
|
}
|