[gnome-shell] screenshot: Respect lockdown settings

[Florian Müllner <fmuellner src gnome org>]

commit f9d909f98558f886d83875fd0361906d75bb0dc1
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Oct 3 16:33:37 2014 +0200

    screenshot: Respect lockdown settings
    
    We allow users/admins to lock down disk writes, respect that when
    taking screenshots.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=737846

 js/ui/screenshot.js |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/screenshot.js b/js/ui/screenshot.js
index 81094dd..45f013c 100644
--- a/js/ui/screenshot.js
+++ b/js/ui/screenshot.js
@@ -67,12 +67,15 @@ const ScreenshotService = new Lang.Class({
 
         this._screenShooter = new Map();
 
+        this._lockdownSettings = new Gio.Settings({ schema_id: 'org.gnome.desktop.lockdown' });
+
         Gio.DBus.session.own_name('org.gnome.Shell.Screenshot', Gio.BusNameOwnerFlags.REPLACE, null, null);
     },
 
     _createScreenshot: function(invocation) {
         let sender = invocation.get_sender();
-        if (this._screenShooter.has(sender)) {
+        if (this._screenShooter.has(sender) ||
+            this._lockdownSettings.get_boolean('disable-save-to-disk')) {
             invocation.return_value(GLib.Variant.new('(bs)', [false, '']));
             return null;
         }