[gnome-shell] loginDialog: (Optionally) show logo below user list

[Florian Müllner <fmuellner src gnome org>]

commit cde695d903df9d6419cf64b52ae831df412feade
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Mar 23 01:27:22 2013 +0100

    loginDialog: (Optionally) show logo below user list
    
    The optional logo on the login screen is currently shown in the
    top bar, which is not only a rather unprominent position, it also
    gives the wrong suggestion of a clickable element.
    Newer designs call for the logo to be shown horizontally centered
    at the bottom of the screen, so implement that instead.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=694912

 data/theme/gnome-shell.css |    4 ++++
 js/gdm/loginDialog.js      |   31 ++++++++++++++++++++++++++++++-
 2 files changed, 34 insertions(+), 1 deletions(-)
---
diff --git a/data/theme/gnome-shell.css b/data/theme/gnome-shell.css
index 7cd4c76..a46ac40 100644
--- a/data/theme/gnome-shell.css
+++ b/data/theme/gnome-shell.css
@@ -2393,6 +2393,10 @@ StScrollBar StButton#vhandle:active {
     height: .75em;
 }
 
+.login-dialog-logo-bin {
+    padding: 24px 0px;
+}
+
 .login-dialog .modal-dialog-button-box {
     spacing: 3px;
 }
diff --git a/js/gdm/loginDialog.js b/js/gdm/loginDialog.js
index f9c5894..bba17ae 100644
--- a/js/gdm/loginDialog.js
+++ b/js/gdm/loginDialog.js
@@ -49,7 +49,7 @@ const UserWidget = imports.ui.userWidget;
 const _FADE_ANIMATION_TIME = 0.25;
 const _SCROLL_ANIMATION_TIME = 0.5;
 const _TIMED_LOGIN_IDLE_THRESHOLD = 5.0;
-const _LOGO_ICON_HEIGHT = 16;
+const _LOGO_ICON_HEIGHT = 48;
 
 const WORK_SPINNER_ICON_SIZE = 24;
 const WORK_SPINNER_ANIMATION_DELAY = 1.0;
@@ -553,6 +553,12 @@ const LoginDialog = new Lang.Class({
                                Lang.bind(this, this._updateBanner));
         this._settings.connect('changed::' + GdmUtil.DISABLE_USER_LIST_KEY,
                                Lang.bind(this, this._updateDisableUserList));
+        this._settings.connect('changed::' + GdmUtil.LOGO_KEY,
+                               Lang.bind(this, this._updateLogo));
+
+        this._textureCache = St.TextureCache.get_default();
+        this._textureCache.connect('texture-file-changed',
+                                   Lang.bind(this, this._updateLogoTexture));
 
         this._userSelectionBox = new St.BoxLayout({ style_class: 'login-dialog-user-selection-box',
                                                     vertical: true });
@@ -645,6 +651,11 @@ const LoginDialog = new Lang.Class({
                                      x_align: St.Align.START,
                                      x_fill: true });
 
+        this._logoBin = new St.Bin({ style_class: 'login-dialog-logo-bin' });
+        this._logoBin.set_y_align(Clutter.ActorAlign.END);
+        this.backgroundStack.add_actor(this._logoBin);
+        this._updateLogo();
+
         if (!this._userManager.is_loaded)
             this._userManagerLoadedId = this._userManager.connect('notify::is-loaded',
                                                                   Lang.bind(this, function() {
@@ -691,6 +702,24 @@ const LoginDialog = new Lang.Class({
         }
     },
 
+    _updateLogoTexture: function(cache, uri) {
+        if (this._logoFileUri != uri)
+            return;
+
+        let icon = null;
+        if (this._logoFileUri)
+            icon = this._textureCache.load_uri_async(this._logoFileUri,
+                                                     -1, _LOGO_ICON_HEIGHT);
+        this._logoBin.set_child(icon);
+    },
+
+    _updateLogo: function() {
+        let path = this._settings.get_string(GdmUtil.LOGO_KEY);
+
+        this._logoFileUri = path ? Gio.file_new_for_path(path).get_uri() : null;
+        this._updateLogoTexture(this._textureCache, this._logoFileUri);
+    },
+
     _reset: function() {
         this._userVerifier.clear();