[gnome-shell] Fix application thumbnail sizing when the height is greater than the width of a window.

[Colin Walters <walters src gnome org>]

commit 9423cc7fae8c1f326b0452762ed9638f860fe115
Author: magcius <jstpierre mecheye net>
Date:   Fri Dec 18 18:50:40 2009 -0500

    Fix application thumbnail sizing when the height is greater than the width of a window.
    
    This bug happened because the thumbnail box was only maxed, not set to 256x256.
    Standard window thumbnails would max out only the width to 256. Having a window with
    its height greater than its width meant that the height would max out, but not the
    width, causing thumbnails to look uneven.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=604963

 data/theme/gnome-shell.css |    5 +++++
 js/ui/altTab.js            |   11 +++++++----
 2 files changed, 12 insertions(+), 4 deletions(-)
---
diff --git a/data/theme/gnome-shell.css b/data/theme/gnome-shell.css
index ce39715..91f08af 100644
--- a/data/theme/gnome-shell.css
+++ b/data/theme/gnome-shell.css
@@ -493,6 +493,11 @@ StTooltip {
     spacing: 4px;
 }
 
+.switcher-list .thumbnail {
+    width:  256px;
+    height: 256px;
+}
+
 .switcher-list .outlined-item-box {
     padding: 6px;
     border: 2px solid rgba(85,85,85,1.0);
diff --git a/js/ui/altTab.js b/js/ui/altTab.js
index 3ed39f8..f211a8b 100644
--- a/js/ui/altTab.js
+++ b/js/ui/altTab.js
@@ -459,7 +459,7 @@ SwitcherList.prototype = {
         this._separator = box;
         this._list.add_actor(box);
     },
-    
+
     highlight: function(index, justOutline) {
         if (this._highlighted != -1)
             this._items[this._highlighted].style_class = 'item-box';
@@ -477,7 +477,7 @@ SwitcherList.prototype = {
     _itemActivated: function(n) {
         this.emit('item-activated', n);
     },
-    
+
     _itemEntered: function(n) {
         this.emit('item-entered', n);
     },
@@ -592,7 +592,7 @@ AppIcon.prototype = {
         this.actor = new St.BoxLayout({ style_class: "alt-tab-app",
                                          vertical: true });
         this._icon = this.app.create_icon_texture(POPUP_APPICON_SIZE);
-        this.actor.add(this._icon, { x_fill: false, y_fill: false });
+        this.actor.add(this._icon, { x_fill: false, y_fill: false } );
         this._label = new St.Label({ text: this.app.get_name() });
         this.actor.add(this._label, { x_fill: false });
     }
@@ -750,11 +750,14 @@ ThumbnailList.prototype = {
             let box = new St.BoxLayout({ style_class: "thumbnail-box",
                                          vertical: true });
 
+            let bin = new St.Bin({ style_class: "thumbnail" });
             let clone = new Clutter.Clone ({ source: windowTexture,
                                              reactive: true,
                                              width: width * scale,
                                              height: height * scale });
-            box.add_actor(clone);
+
+            bin.add_actor(clone);
+            box.add_actor(bin);
 
             let title = windows[i].get_title();
             if (title) {