[gnome-shell] panel: Pick up spinner icon from CSS

[Florian Müllner <fmuellner src gnome org>]

commit 4710753700551870bba07d2e8a19053b4e058dc1
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Apr 16 16:57:46 2013 +0200

    panel: Pick up spinner icon from CSS
    
    In order to use a different spinner image in classic mode (or any
    other mode specific style), get it from CSS rather than hardcoding
    a particular image.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=693688

 data/theme/gnome-shell.css |  1 +
 js/ui/panel.js             | 33 +++++++++++++++++++++++++++------
 2 files changed, 28 insertions(+), 6 deletions(-)
---
diff --git a/data/theme/gnome-shell.css b/data/theme/gnome-shell.css
index 954d50a..c4d49ed 100644
--- a/data/theme/gnome-shell.css
+++ b/data/theme/gnome-shell.css
@@ -512,6 +512,7 @@ StScrollBar StButton#vhandle:active {
 }
 
 #appMenu {
+    spinner-image: url("process-working.svg");
     spacing: 4px;
 }
 
diff --git a/js/ui/panel.js b/js/ui/panel.js
index 49f1769..303e241 100644
--- a/js/ui/panel.js
+++ b/js/ui/panel.js
@@ -258,6 +258,7 @@ const AppMenuButton = new Lang.Class({
         this._actionGroupNotifyId = 0;
 
         let bin = new St.Bin({ name: 'appMenu' });
+        bin.connect('style-changed', Lang.bind(this, this._onStyleChanged));
         this.actor.add_actor(bin);
 
         this.actor.bind_property("reactive", this.actor, "can-focus", 0);
@@ -297,11 +298,7 @@ const AppMenuButton = new Lang.Class({
 
         this._stop = true;
 
-        let spinnerIcon = global.datadir + '/theme/process-working.svg';
-        this._spinner = new AnimatedIcon(spinnerIcon, PANEL_ICON_SIZE);
-        this._container.add_actor(this._spinner.actor);
-        this._spinner.actor.hide();
-        this._spinner.actor.lower_bottom();
+        this._spinner = null;
 
         let tracker = Shell.WindowTracker.get_default();
         let appSys = Shell.AppSystem.get_default();
@@ -354,6 +351,18 @@ const AppMenuButton = new Lang.Class({
                            onCompleteScope: this });
     },
 
+    _onStyleChanged: function(actor) {
+        let node = actor.get_theme_node();
+        let [success, icon] = node.lookup_url('spinner-image', false);
+        if (!success || this._spinnerIcon == icon)
+            return;
+        this._spinnerIcon = icon;
+        this._spinner = new AnimatedIcon(this._spinnerIcon, PANEL_ICON_SIZE);
+        this._container.add_actor(this._spinner.actor);
+        this._spinner.actor.hide();
+        this._spinner.actor.lower_bottom();
+    },
+
     _onIconBoxStyleChanged: function() {
         let node = this._iconBox.get_theme_node();
         this._iconBottomClip = node.get_length('app-icon-bottom-clip');
@@ -385,6 +394,10 @@ const AppMenuButton = new Lang.Class({
 
         this._stop = true;
         this.actor.reactive = true;
+
+        if (this._spinner == null)
+            return;
+
         Tweener.addTween(this._spinner.actor,
                          { opacity: 0,
                            time: SPINNER_ANIMATION_TIME,
@@ -401,6 +414,10 @@ const AppMenuButton = new Lang.Class({
     startAnimation: function() {
         this._stop = false;
         this.actor.reactive = false;
+
+        if (this._spinner == null)
+            return;
+
         this._spinner.play();
         this._spinner.actor.show();
     },
@@ -463,6 +480,9 @@ const AppMenuButton = new Lang.Class({
         }
         this._label.actor.allocate(childBox, flags);
 
+        if (this._spinner == null)
+            return;
+
         if (direction == Clutter.TextDirection.LTR) {
             childBox.x1 = Math.floor(iconWidth / 2) + this._label.actor.width;
             childBox.x2 = childBox.x1 + this._spinner.actor.width;
@@ -553,7 +573,8 @@ const AppMenuButton = new Lang.Class({
             return;
         }
 
-        this._spinner.actor.hide();
+        if (this._spinner)
+            this._spinner.actor.hide();
         if (this._iconBox.child != null)
             this._iconBox.child.destroy();
         this._iconBox.hide();