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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/. */
/*
* Provides functions to handle remote tabs (ie, tabs known by Sync) in
* the awesomebar.
*/
"use strict";
this.EXPORTED_SYMBOLS = ["PlacesRemoteTabsAutocompleteProvider"];
const { classes: Cc, interfaces: Ci, results: Cr, utils: Cu } = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
XPCOMUtils.defineLazyGetter(this, "weaveXPCService", function() {
return Cc["@mozilla.org/weave/service;1"]
.getService(Ci.nsISupports)
.wrappedJSObject;
});
XPCOMUtils.defineLazyGetter(this, "Weave", () => {
try {
let {Weave} = Cu.import("resource://services-sync/main.js", {});
return Weave;
} catch (ex) {
// The app didn't build Sync.
}
return null;
});
// from MDN...
function escapeRegExp(string) {
return string.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
}
// Build the in-memory structure we use.
function buildItems() {
let clients = new Map(); // keyed by client guid, value is client
let tabs = new Map(); // keyed by string URL, value is {clientId, tab}
// If Sync isn't initialized (either due to lag at startup or due to no user
// being signed in), don't reach in to Weave.Service as that may initialize
// Sync unnecessarily - we'll get an observer notification later when it
// becomes ready and has synced a list of tabs.
if (weaveXPCService.ready) {
let engine = Weave.Service.engineManager.get("tabs");
for (let [guid, client] of Object.entries(engine.getAllClients())) {
clients.set(guid, client);
for (let tab of client.tabs) {
let url = tab.urlHistory[0];
tabs.set(url, { clientId: guid, tab });
}
}
}
return { clients, tabs };
}
// Manage the cache of the items we use.
// The cache itself.
let _items = null;
// Ensure the cache is good.
function ensureItems() {
if (!_items) {
_items = buildItems();
}
return _items;
}
// A preference used to disable the showing of icons in remote tab records.
const PREF_SHOW_REMOTE_ICONS = "services.sync.syncedTabs.showRemoteIcons";
let showRemoteIcons;
// An observer to invalidate _items and watch for changed prefs.
function observe(subject, topic, data) {
switch (topic) {
case "weave:engine:sync:finish":
if (data == "tabs") {
// The tabs engine just finished syncing, so may have a different list
// of tabs then we previously cached.
_items = null;
}
break;
case "weave:service:start-over":
// Sync is being reset due to the user disconnecting - we must invalidate
// the cache so we don't supply tabs from a different user.
_items = null;
break;
case "nsPref:changed":
if (data == PREF_SHOW_REMOTE_ICONS) {
showRemoteIcons = Services.prefs.getBoolPref(PREF_SHOW_REMOTE_ICONS, true);
}
break;
default:
break;
}
}
Services.obs.addObserver(observe, "weave:engine:sync:finish", false);
Services.obs.addObserver(observe, "weave:service:start-over", false);
// Observe the pref for showing remote icons and prime our bool that reflects its value.
Services.prefs.addObserver(PREF_SHOW_REMOTE_ICONS, observe, false);
observe(null, "nsPref:changed", PREF_SHOW_REMOTE_ICONS);
// This public object is a static singleton.
this.PlacesRemoteTabsAutocompleteProvider = {
// a promise that resolves with an array of matching remote tabs.
getMatches(searchString) {
// If Sync isn't configured we bail early.
if (Weave === null ||
!Services.prefs.prefHasUserValue("services.sync.username")) {
return Promise.resolve([]);
}
let re = new RegExp(escapeRegExp(searchString), "i");
let matches = [];
let { tabs, clients } = ensureItems();
for (let [url, { clientId, tab }] of tabs) {
let title = tab.title;
if (url.match(re) || (title && title.match(re))) {
// lookup the client record.
let client = clients.get(clientId);
let icon = showRemoteIcons ? tab.icon : null;
// create the record we return for auto-complete.
let record = {
url, title, icon,
deviceClass: Weave.Service.clientsEngine.isMobile(clientId) ? "mobile" : "desktop",
deviceName: client.clientName,
};
matches.push(record);
}
}
return Promise.resolve(matches);
},
}
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