screensaver: factor out a ScreenSaverProxy helper class

This class will be shared between StatusMenu and the upcoming AutomountManager classes. https://bugzilla.gnome.org/show_bug.cgi?id=653520
2011-07-12 11:42:33 -04:00
parent c632074ba7
commit 6004e3d2e1
3 changed files with 62 additions and 12 deletions
--- a/js/misc/screenSaver.js
+++ b/js/misc/screenSaver.js
@ -0,0 +1,59 @@
+/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
+
+const DBus = imports.dbus;
+const Lang = imports.lang;
+const Signals = imports.signals;
+
+const ScreenSaverIface = {
+    name: 'org.gnome.ScreenSaver',
+    methods: [{ name: 'GetActive',
+                inSignature: '',
+                outSignature: 'b' },
+              { name: 'Lock',
+                inSignature: '' },
+              { name: 'SetActive',
+                inSignature: 'b' }],
+    signals: [{ name: 'ActiveChanged',
+                inSignature: 'b' }]
+};
+
+function ScreenSaverProxy() {
+    this._init();
+}
+
+ScreenSaverProxy.prototype = {
+    _init: function() {
+        DBus.session.proxifyObject(this,
+                                   'org.gnome.ScreenSaver',
+                                   '/org/gnome/ScreenSaver');
+
+        DBus.session.watch_name('org.gnome.ScreenSaver',
+                                false, // do not launch a name-owner if none exists
+                                Lang.bind(this, this._onSSAppeared),
+                                Lang.bind(this, this._onSSVanished));
+
+        this.connect('ActiveChanged',
+                     Lang.bind(this, this._onActiveChanged));
+    },
+
+    _onSSAppeared: function(owner) {
+        this.GetActiveRemote(Lang.bind(this, function(isActive) {
+            this._screenSaverActive = isActive;
+        }))
+    },
+
+    _onSSVanished: function(oldOwner) {
+        this._screenSaverActive = false;
+    },
+
+    _onActiveChanged: function(object, isActive) {
+        this._screenSaverActive = isActive;
+        this.emit('active-changed', this._screenSaverActive);
+    },
+
+    getActive: function() {
+        return this._screenSaverActive;
+    }
+};
+DBus.proxifyPrototype(ScreenSaverProxy.prototype, ScreenSaverIface);
+Signals.addSignalMethods(ScreenSaverProxy.prototype);