gecko/toolkit/components/places/PlacesCategoriesStarter.js
Jim Blandy 4d6a633bba Bug 914753: Make Emacs file variable header lines correct, or at least consistent. DONTBUILD r=ehsan
The -*- file variable lines -*- establish per-file settings that Emacs will
pick up. This patch makes the following changes to those lines (and touches
nothing else):

 - Never set the buffer's mode.

   Years ago, Emacs did not have a good JavaScript mode, so it made sense
   to use Java or C++ mode in .js files. However, Emacs has had js-mode for
   years now; it's perfectly serviceable, and is available and enabled by
   default in all major Emacs packagings.

   Selecting a mode in the -*- file variable line -*- is almost always the
   wrong thing to do anyway. It overrides Emacs's default choice, which is
   (now) reasonable; and even worse, it overrides settings the user might
   have made in their '.emacs' file for that file extension. It's only
   useful when there's something specific about that particular file that
   makes a particular mode appropriate.

 - Correctly propagate settings that establish the correct indentation
   level for this file: c-basic-offset and js2-basic-offset should be
   js-indent-level. Whatever value they're given should be preserved;
   different parts of our tree use different indentation styles.

 - We don't use tabs in Mozilla JS code. Always set indent-tabs-mode: nil.
   Remove tab-width: settings, at least in files that don't contain tab
   characters.

 - Remove js2-mode settings that belong in the user's .emacs file, like
   js2-skip-preprocessor-directives.
2014-06-24 22:12:07 -07:00

113 lines
4.0 KiB
JavaScript

/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
* vim: sw=2 ts=2 sts=2 expandtab
* 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/. */
////////////////////////////////////////////////////////////////////////////////
//// Constants
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
// Fired by TelemetryPing when async telemetry data should be collected.
const TOPIC_GATHER_TELEMETRY = "gather-telemetry";
// Seconds between maintenance runs.
const MAINTENANCE_INTERVAL_SECONDS = 7 * 86400;
////////////////////////////////////////////////////////////////////////////////
//// Imports
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
Components.utils.import("resource://gre/modules/Services.jsm");
Components.utils.import("resource://gre/modules/PlacesUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "PlacesDBUtils",
"resource://gre/modules/PlacesDBUtils.jsm");
/**
* This component can be used as a starter for modules that have to run when
* certain categories are invoked.
*/
function PlacesCategoriesStarter()
{
Services.obs.addObserver(this, TOPIC_GATHER_TELEMETRY, false);
Services.obs.addObserver(this, PlacesUtils.TOPIC_SHUTDOWN, false);
// nsINavBookmarkObserver implementation.
let notify = (function () {
if (!this._notifiedBookmarksSvcReady) {
// For perf reasons unregister from the category, since no further
// notifications are needed.
Cc["@mozilla.org/categorymanager;1"]
.getService(Ci.nsICategoryManager)
.deleteCategoryEntry("bookmarks-observer", this, false);
// Directly notify PlacesUtils, to ensure it catches the notification.
PlacesUtils.observe(null, "bookmarks-service-ready", null);
}
}).bind(this);
[ "onItemAdded", "onItemRemoved", "onItemChanged", "onBeginUpdateBatch",
"onEndUpdateBatch", "onItemVisited",
"onItemMoved" ].forEach(function(aMethod) {
this[aMethod] = notify;
}, this);
}
PlacesCategoriesStarter.prototype = {
//////////////////////////////////////////////////////////////////////////////
//// nsIObserver
observe: function PCS_observe(aSubject, aTopic, aData)
{
switch (aTopic) {
case PlacesUtils.TOPIC_SHUTDOWN:
Services.obs.removeObserver(this, PlacesUtils.TOPIC_SHUTDOWN);
Services.obs.removeObserver(this, TOPIC_GATHER_TELEMETRY);
let globalObj =
Cu.getGlobalForObject(PlacesCategoriesStarter.prototype);
let descriptor =
Object.getOwnPropertyDescriptor(globalObj, "PlacesDBUtils");
if (descriptor.value !== undefined) {
PlacesDBUtils.shutdown();
}
break;
case TOPIC_GATHER_TELEMETRY:
PlacesDBUtils.telemetry();
break;
case "idle-daily":
// Once a week run places.sqlite maintenance tasks.
let lastMaintenance = 0;
try {
lastMaintenance =
Services.prefs.getIntPref("places.database.lastMaintenance");
} catch (ex) {}
let nowSeconds = parseInt(Date.now() / 1000);
if (lastMaintenance < nowSeconds - MAINTENANCE_INTERVAL_SECONDS) {
PlacesDBUtils.maintenanceOnIdle();
}
break;
default:
throw new Error("Trying to handle an unknown category.");
}
},
//////////////////////////////////////////////////////////////////////////////
//// nsISupports
classID: Components.ID("803938d5-e26d-4453-bf46-ad4b26e41114"),
_xpcom_factory: XPCOMUtils.generateSingletonFactory(PlacesCategoriesStarter),
QueryInterface: XPCOMUtils.generateQI([
Ci.nsIObserver
, Ci.nsINavBookmarkObserver
])
};
////////////////////////////////////////////////////////////////////////////////
//// Module Registration
let components = [PlacesCategoriesStarter];
this.NSGetFactory = XPCOMUtils.generateNSGetFactory(components);