Update for review of e57b7ec335

Clutter no longer allows using a clone of an actor that is not a part of
the scene graph. This is what used to happen when we created a clone for
the icon of the item that was being dragged, and then closed the More panes
with the original item, removing the icon from the scene graph. This was
also when happened when the user hit Esc while dragging, which prompted the
overlay to close, removing the original icon from the scene graph.

Rename getIcon() methods to createIcon() to better reflect on the fact that
a new icon is created each time the method is called (we do use cache in
some cases).

Remove a stray log message in overlay.js

Fixes http://bugzilla.gnome.org/show_bug.cgi?id=585490
and http://bugzilla.gnome.org/show_bug.cgi?id=585489

data/close.svg

@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Generator: Adobe Illustrator 13.0.2, SVG Export Plug-In . SVG Version: 6.00 Build 14948)  -->
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="Foreground"
+   x="0px"
+   y="0px"
+   width="16px"
+   height="16px"
+   viewBox="0 0 16 16"
+   enable-background="new 0 0 16 16"
+   xml:space="preserve"
+   sodipodi:version="0.32"
+   inkscape:version="0.46"
+   sodipodi:docname="x_circle_16.svg"
+   inkscape:output_extension="org.inkscape.output.svg.inkscape"><metadata
+   id="metadata2399"><rdf:RDF><cc:Work
+       rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+         rdf:resource="http://purl.org/dc/dcmitype/StillImage" /></cc:Work></rdf:RDF></metadata><defs
+   id="defs2397"><linearGradient
+     id="linearGradient3173"><stop
+       style="stop-color:#c4c4c4;stop-opacity:1;"
+       offset="0"
+       id="stop3175" /><stop
+       style="stop-color:#ffffff;stop-opacity:1;"
+       offset="1"
+       id="stop3177" /></linearGradient><inkscape:perspective
+     sodipodi:type="inkscape:persp3d"
+     inkscape:vp_x="0 : 8 : 1"
+     inkscape:vp_y="0 : 1000 : 0"
+     inkscape:vp_z="16 : 8 : 1"
+     inkscape:persp3d-origin="8 : 5.3333333 : 1"
+     id="perspective2401" /><linearGradient
+     inkscape:collect="always"
+     xlink:href="#linearGradient3173"
+     id="linearGradient3179"
+     x1="7.844358"
+     y1="16"
+     x2="7.7198443"
+     y2="-0.062256809"
+     gradientUnits="userSpaceOnUse" /></defs><sodipodi:namedview
+   inkscape:window-height="713"
+   inkscape:window-width="1197"
+   inkscape:pageshadow="2"
+   inkscape:pageopacity="0.0"
+   guidetolerance="10.0"
+   gridtolerance="10.0"
+   objecttolerance="10.0"
+   borderopacity="1.0"
+   bordercolor="#666666"
+   pagecolor="#ffffff"
+   id="base"
+   showgrid="false"
+   inkscape:zoom="32.125"
+   inkscape:cx="8"
+   inkscape:cy="8"
+   inkscape:window-x="40"
+   inkscape:window-y="40"
+   inkscape:current-layer="Foreground" />
+<path
+   fill-rule="evenodd"
+   clip-rule="evenodd"
+   d="M10.5,3.5l2,2L10,8l2.5,2.5l-2,2L8,10l-2.5,2.5l-2-2L6,8L3.5,5.5l2-2L8,6L10.5,3.5  z M0,8c0-4.418,3.582-8,8-8s8,3.582,8,8s-3.582,8-8,8S0,12.418,0,8z"
+   id="path2394"
+   style="fill-opacity:1;fill:url(#linearGradient3179)" />
+</svg>

data/gnome-shell.schemas

@@ -15,6 +15,21 @@
 	</locale>
       </schema>
 
+      <schema>
+        <key>/schemas/desktop/gnome/shell/favorite_apps</key>
+	<applyto>/desktop/gnome/shell/favorite_apps</applyto>
+	<owner>gnome-shell</owner>
+	<type>list</type>
+	<listtype>string</listtype>
+	<default>[mozilla-firefox.desktop,evolution.desktop,openoffice.org-writer.desktop]</default>
+	<locale name="C">
+	  <short>List of desktop file IDs for favorite applications</short>
+	  <long>
+        The applications corresponding to these identifiers will be displayed in the favorites area.
+	  </long>
+	</locale>
+      </schema>
+
   </schemalist>
 
 </gconfschemafile>

data/info.svg

@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Generator: Adobe Illustrator 13.0.2, SVG Export Plug-In . SVG Version: 6.00 Build 14948)  -->
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="Foreground"
+   x="0px"
+   y="0px"
+   width="16px"
+   height="16px"
+   viewBox="0 0 16 16"
+   enable-background="new 0 0 16 16"
+   xml:space="preserve"
+   sodipodi:version="0.32"
+   inkscape:version="0.46"
+   sodipodi:docname="info_16.svg"
+   inkscape:output_extension="org.inkscape.output.svg.inkscape"><metadata
+   id="metadata2389"><rdf:RDF><cc:Work
+       rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+         rdf:resource="http://purl.org/dc/dcmitype/StillImage" /></cc:Work></rdf:RDF></metadata><defs
+   id="defs2387"><linearGradient
+     id="linearGradient3710"><stop
+       style="stop-color:#c4c4c4;stop-opacity:1;"
+       offset="0"
+       id="stop3712" /><stop
+       style="stop-color:#ffffff;stop-opacity:1;"
+       offset="1"
+       id="stop3714" /></linearGradient><inkscape:perspective
+     sodipodi:type="inkscape:persp3d"
+     inkscape:vp_x="0 : 8 : 1"
+     inkscape:vp_y="0 : 1000 : 0"
+     inkscape:vp_z="16 : 8 : 1"
+     inkscape:persp3d-origin="8 : 5.3333333 : 1"
+     id="perspective2391" /><linearGradient
+     inkscape:collect="always"
+     xlink:href="#linearGradient3710"
+     id="linearGradient3716"
+     x1="7.9066148"
+     y1="15.937743"
+     x2="7.9377432"
+     y2="0.031128405"
+     gradientUnits="userSpaceOnUse" /></defs><sodipodi:namedview
+   inkscape:window-height="713"
+   inkscape:window-width="722"
+   inkscape:pageshadow="2"
+   inkscape:pageopacity="0.0"
+   guidetolerance="10.0"
+   gridtolerance="10.0"
+   objecttolerance="10.0"
+   borderopacity="1.0"
+   bordercolor="#666666"
+   pagecolor="#ffffff"
+   id="base"
+   showgrid="false"
+   inkscape:zoom="32.125"
+   inkscape:cx="8"
+   inkscape:cy="8.154146"
+   inkscape:window-x="20"
+   inkscape:window-y="20"
+   inkscape:current-layer="Foreground" />
+<path
+   fill-rule="evenodd"
+   clip-rule="evenodd"
+   d="M7,3h2v2H7V3z M5.5,12H7V8H5.5V7H9v5h1.5v1h-5V12z M0,8c0-4.418,3.582-8,8-8  s8,3.582,8,8s-3.582,8-8,8S0,12.418,0,8z"
+   id="path2384"
+   style="fill-opacity:1;fill:url(#linearGradient3716)" />
+</svg>

data/view-more-activated.svg

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Generator: Adobe Illustrator 13.0.2, SVG Export Plug-In . SVG Version: 6.00 Build 14948)  -->
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="Foreground"
+   x="0px"
+   y="0px"
+   width="29px"
+   height="18px"
+   viewBox="0 0 29 18"
+   enable-background="new 0 0 29 18"
+   xml:space="preserve"
+   sodipodi:version="0.32"
+   inkscape:version="0.46"
+   sodipodi:docname="search_2.svg"
+   inkscape:output_extension="org.inkscape.output.svg.inkscape"><metadata
+   id="metadata16"><rdf:RDF><cc:Work
+       rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+         rdf:resource="http://purl.org/dc/dcmitype/StillImage" /></cc:Work></rdf:RDF></metadata><defs
+   id="defs14"><inkscape:perspective
+   sodipodi:type="inkscape:persp3d"
+   inkscape:vp_x="0 : 9 : 1"
+   inkscape:vp_y="0 : 1000 : 0"
+   inkscape:vp_z="29 : 9 : 1"
+   inkscape:persp3d-origin="14.5 : 6 : 1"
+   id="perspective18" />
+	
+	
+</defs><sodipodi:namedview
+   inkscape:window-height="728"
+   inkscape:window-width="1103"
+   inkscape:pageshadow="2"
+   inkscape:pageopacity="0.0"
+   guidetolerance="10.0"
+   gridtolerance="10.0"
+   objecttolerance="10.0"
+   borderopacity="1.0"
+   bordercolor="#666666"
+   pagecolor="#ffffff"
+   id="base"
+   showgrid="false"
+   inkscape:zoom="19.275862"
+   inkscape:cx="14.5"
+   inkscape:cy="9"
+   inkscape:window-x="40"
+   inkscape:window-y="40"
+   inkscape:current-layer="Foreground"><inkscape:grid
+     type="xygrid"
+     id="grid2391" /></sodipodi:namedview>
+
+<path
+   style="fill:#4669a9;fill-opacity:1"
+   id="path9"
+   d="" />
+<path
+   id="path3"
+   style="fill:#3d5a93;fill-opacity:1"
+   d="M 0,3 C 0,1.343 1.343,0 3,0 L 20,0 C 20.515,0 21.027,0.195 21.42,0.588 L 28.412,7.58 C 29.196,8.364 29.196,9.636 28.412,10.42 L 21.42,17.412 C 21.028,17.804 20.514,18 20,18 L 3,18 C 1.343,18 0,16.657 0,15 L 0,3 zM 13.5,3 C 11.015,3 9,5.015 9,7.5 C 9,8.2423219 9.1815696,8.9452421 9.5,9.5625 L 6.25,12.8125 C 5.931,13.1325 5.9310002,13.64975 6.25,13.96875 L 7.03125,14.78125 C 7.35025,15.10025 7.8674999,15.10025 8.1875,14.78125 L 11.46875,11.5 C 12.080227,11.810879 12.767137,12 13.5,12 C 15.985,12 18,9.985 18,7.5 C 18,5.015 15.985,3 13.5,3 z M 11.25,7.5 C 11.25,6.257 12.257,5.25 13.5,5.25 C 14.743,5.25 15.75,6.257 15.75,7.5 C 15.75,8.743 14.743,9.75 13.5,9.75 C 12.257,9.75 11.25,8.743 11.25,7.5 z" />
+</svg>

data/view-more.svg

@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Generator: Adobe Illustrator 13.0.2, SVG Export Plug-In . SVG Version: 6.00 Build 14948)  -->
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="Foreground"
+   x="0px"
+   y="0px"
+   width="29px"
+   height="18px"
+   viewBox="0 0 29 18"
+   enable-background="new 0 0 29 18"
+   xml:space="preserve"
+   sodipodi:version="0.32"
+   inkscape:version="0.46"
+   sodipodi:docname="search_1.svg"
+   inkscape:output_extension="org.inkscape.output.svg.inkscape"><metadata
+   id="metadata16"><rdf:RDF><cc:Work
+       rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+         rdf:resource="http://purl.org/dc/dcmitype/StillImage" /></cc:Work></rdf:RDF></metadata><defs
+   id="defs14"><inkscape:perspective
+     sodipodi:type="inkscape:persp3d"
+     inkscape:vp_x="0 : 9 : 1"
+     inkscape:vp_y="0 : 1000 : 0"
+     inkscape:vp_z="29 : 9 : 1"
+     inkscape:persp3d-origin="14.5 : 6 : 1"
+     id="perspective18" /></defs><sodipodi:namedview
+   inkscape:window-height="728"
+   inkscape:window-width="1103"
+   inkscape:pageshadow="2"
+   inkscape:pageopacity="0.0"
+   guidetolerance="10.0"
+   gridtolerance="10.0"
+   objecttolerance="10.0"
+   borderopacity="1.0"
+   bordercolor="#666666"
+   pagecolor="#ffffff"
+   id="base"
+   showgrid="false"
+   inkscape:zoom="19.275862"
+   inkscape:cx="14.5"
+   inkscape:cy="9"
+   inkscape:window-x="40"
+   inkscape:window-y="40"
+   inkscape:current-layer="Foreground"><inkscape:grid
+     type="xygrid"
+     id="grid2391" /></sodipodi:namedview>
+<path
+   d="M0,3c0-1.657,1.343-3,3-3h17c0.515,0,1.027,0.195,1.42,0.588l6.992,6.992c0.784,0.784,0.784,2.056,0,2.84l-6.992,6.992  C21.028,17.804,20.514,18,20,18H3c-1.657,0-3-1.343-3-3V3z"
+   id="path3"
+   style="fill:#151e2f;fill-opacity:1" />
+<g
+   id="g5"
+   style="fill:#4669a9;fill-opacity:1">
+	<path
+   fill="#FFFFFF"
+   d="M6.246,13.98c-0.319-0.319-0.319-0.837,0-1.157l3.717-3.717c0.319-0.319,0.837-0.319,1.157,0l0.786,0.787   c0.32,0.319,0.32,0.837,0,1.157l-3.717,3.717c-0.32,0.319-0.838,0.319-1.157,0L6.246,13.98L6.246,13.98z"
+   id="path7"
+   style="fill:#4669a9;fill-opacity:1" />
+	<path
+   fill="#FFFFFF"
+   d="M9.076,11.937"
+   id="path9"
+   style="fill:#4669a9;fill-opacity:1" />
+</g>
+<path
+   fill-rule="evenodd"
+   clip-rule="evenodd"
+   fill="#FFFFFF"
+   d="M11.25,7.5c0-1.243,1.007-2.25,2.25-2.25s2.25,1.007,2.25,2.25  s-1.007,2.25-2.25,2.25S11.25,8.743,11.25,7.5z M9,7.5C9,5.015,11.015,3,13.5,3S18,5.015,18,7.5S15.985,12,13.5,12S9,9.985,9,7.5z"
+   id="path11"
+   style="fill:#4669a9;fill-opacity:1" />
+</svg>

js/misc/appInfo.js

@@ -7,32 +7,6 @@ const Shell = imports.gi.Shell;
 
 const Main = imports.ui.main;
 
-// TODO - move this into GConf once we're not a plugin anymore
-// but have taken over metacity
-// This list is taken from GNOME Online popular applications
-// http://online.gnome.org/applications
-// but with nautilus removed (since it should already be running)
-// and evince, totem, and gnome-file-roller removed (since they're
-// usually started by opening documents, not by opening the app
-// directly)
-const DEFAULT_APPLICATIONS = [
-    'mozilla-firefox.desktop',
-    'gnome-terminal.desktop',
-    'evolution.desktop',
-    'gedit.desktop',
-    'mozilla-thunderbird.desktop',
-    'rhythmbox.desktop',
-    'epiphany.desktop',
-    'xchat.desktop',
-    'openoffice.org-1.9-writer.desktop',
-    'emacs.desktop',
-    'gnome-system-monitor.desktop',
-    'openoffice.org-1.9-calc.desktop',
-    'eclipse.desktop',
-    'openoffice.org-1.9-impress.desktop',
-    'vncviewer.desktop'
-];
-
 function AppInfo(appId) {
     this._init(appId);
 }
@@ -41,8 +15,9 @@ AppInfo.prototype = {
     _init : function(appId) {
         this.appId = appId;
         this._gAppInfo = Gio.DesktopAppInfo.new(appId);
-        if (!this._gAppInfo)
+        if (!this._gAppInfo) {
             throw new Error('Unknown appId ' + appId);
+        }
 
         this.id = this._gAppInfo.get_id();
         this.name = this._gAppInfo.get_name();
@@ -52,7 +27,7 @@ AppInfo.prototype = {
         this._gicon = this._gAppInfo.get_icon();
     },
 
-    getIcon : function(size) {
+    createIcon : function(size) {
         if (this._gicon)
             return Shell.TextureCache.get_default().load_gicon(this._gicon, size);
         else
@@ -96,40 +71,64 @@ function getAppInfo(appId) {
     return info;
 }
 
-// getMostUsedApps:
+// getTopApps:
 // @count: maximum number of apps to retrieve
 //
 // Gets a list of #AppInfos for the @count most-frequently-used
-// applications
+// applications, with explicitly-chosen favorites first.
 //
 // Return value: the list of #AppInfo
-function getMostUsedApps(count) {
+function getTopApps(count) {
     let appMonitor = Shell.AppMonitor.get_default();
 
+    let matches = [], alreadyAdded = {};
+
+    let favs = getFavorites();
+    for (let i = 0; i < favs.length && favs.length <= count; i++) {
+        let appId = favs[i].appId;
+
+        if (alreadyAdded[appId])
+            continue;
+        alreadyAdded[appId] = true;
+
+        matches.push(favs[i]);
+    }
+
     // Ask for more apps than we need, since the list of recently used
     // apps might contain an app we don't have a desktop file for
     let apps = appMonitor.get_most_used_apps (0, Math.round(count * 1.5));
-    let matches = [], alreadyAdded = {};
-
     for (let i = 0; i < apps.length && matches.length <= count; i++) {
         let appId = apps[i] + ".desktop";
+        if (alreadyAdded[appId])
+            continue;
+        alreadyAdded[appId] = true;
         let appInfo = getAppInfo(appId);
         if (appInfo) {
             matches.push(appInfo);
-            alreadyAdded[appId] = true;
         }
     }
 
-    // Fill the list with default applications it's not full yet
-    for (let i = 0; i < DEFAULT_APPLICATIONS.length && matches.length <= count; i++) {
-        let appId = DEFAULT_APPLICATIONS[i];
-        if (alreadyAdded[appId])
-            continue;
-
-        let appInfo = getAppInfo(appId);
-        if (appInfo)
-            matches.push(appInfo);
-    }
-
     return matches;
 }
+
+function _idListToInfos(ids) {
+    let infos = [];
+    for (let i = 0; i < ids.length; i++) {
+        let display = getAppInfo(ids[i]);
+        if (display == null)
+            continue;
+        infos.push(display);
+    }
+    return infos;
+}
+
+function getFavorites() {
+    let system = Shell.AppSystem.get_default();
+
+    return _idListToInfos(system.get_favorites());
+}
+
+function getRunning() {
+    let monitor = Shell.AppMonitor.get_default();
+    return _idListToInfos(monitor.get_running_app_ids());
+}

js/misc/docInfo.js

@@ -21,7 +21,7 @@ DocInfo.prototype = {
         this.mimeType = recentInfo.get_mime_type();
     },
 
-    getIcon : function(size) {
+    createIcon : function(size) {
         let icon = new Clutter.Texture();
         let iconPixbuf;
 

js/ui/appDisplay.js

@@ -5,16 +5,21 @@ const Clutter = imports.gi.Clutter;
 const Pango = imports.gi.Pango;
 const Gio = imports.gi.Gio;
 const Gtk = imports.gi.Gtk;
+const Tidy = imports.gi.Tidy;
 const Shell = imports.gi.Shell;
 const Lang = imports.lang;
 const Signals = imports.signals;
+const Mainloop = imports.mainloop;
 
 const AppInfo = imports.misc.appInfo;
+const DND = imports.ui.dnd;
 const GenericDisplay = imports.ui.genericDisplay;
 
 const ENTERED_MENU_COLOR = new Clutter.Color();
 ENTERED_MENU_COLOR.from_pixel(0x00ff0022);
 
+const APP_ICON_SIZE = 48;
+
 const MENU_ICON_SIZE = 24;
 const MENU_SPACING = 15;
 
@@ -33,11 +38,10 @@ AppDisplayItem.prototype = {
     __proto__:  GenericDisplay.GenericDisplayItem.prototype,
 
     _init : function(appInfo, availableWidth) {
-        GenericDisplay.GenericDisplayItem.prototype._init.call(this, availableWidth); 
+        GenericDisplay.GenericDisplayItem.prototype._init.call(this, availableWidth);
         this._appInfo = appInfo;
 
-        this._setItemInfo(appInfo.name, appInfo.description,
-                          appInfo.getIcon(GenericDisplay.ITEM_DISPLAY_ICON_SIZE));
+        this._setItemInfo(appInfo.name, appInfo.description);
     },
 
     //// Public method overrides ////
@@ -49,15 +53,20 @@ AppDisplayItem.prototype = {
 
     //// Protected method overrides ////
 
+    // Returns an icon for the item.
+    _createIcon : function() {
+        return this._appInfo.createIcon(GenericDisplay.ITEM_DISPLAY_ICON_SIZE);
+    },
+
     // Ensures the preview icon is created.
     _ensurePreviewIconCreated : function() {
         if (!this._showPreview || this._previewIcon)
-            return; 
+            return;
 
         let previewIconPath = this._appInfo.getIconPath(GenericDisplay.PREVIEW_ICON_SIZE);
         if (previewIconPath) {
             try {
-                this._previewIcon = new Clutter.Texture({ width: GenericDisplay.PREVIEW_ICON_SIZE, height: GenericDisplay.PREVIEW_ICON_SIZE});               
+                this._previewIcon = new Clutter.Texture({ width: GenericDisplay.PREVIEW_ICON_SIZE, height: GenericDisplay.PREVIEW_ICON_SIZE});
                 this._previewIcon.set_from_file(previewIconPath);
             } catch (e) {
                 // we can get an error here if the file path doesn't exist on the system
@@ -147,6 +156,7 @@ MenuItem.prototype = {
 }
 Signals.addSignalMethods(MenuItem.prototype);
 
+
 /* This class represents a display containing a collection of application items.
  * The applications are sorted based on their popularity by default, and based on
  * their name if some search filter is applied.
@@ -173,16 +183,15 @@ AppDisplay.prototype = {
         this._appMonitor = Shell.AppMonitor.get_default();
         this._appSystem = Shell.AppSystem.get_default();
         this._appsStale = true;
-        this._appSystem.connect('changed', Lang.bind(this, function(appSys) {
+        this._appSystem.connect('installed-changed', Lang.bind(this, function(appSys) {
             this._appsStale = true;
-            // We still need to determine what events other than search can trigger
-            // a change in the set of applications that are being shown while the
-            // user in in the overlay mode, however let's redisplay just in case.
             this._redisplay(false);
             this._redisplayMenus();
         }));
+        this._appSystem.connect('favorites-changed', Lang.bind(this, function(appSys) {
+            this._redisplay(false);
+        }));
         this._appMonitor.connect('changed', Lang.bind(this, function(monitor) {
-            this._appsStale = true;
             this._redisplay(false);
         }));
 
@@ -308,8 +317,6 @@ AppDisplay.prototype = {
         this._appCategories[appId] = categories;
     },
 
-    //// Protected method overrides //// 
-
     // Gets information about all applications by calling Gio.app_info_get_all().
     _refreshCache : function() {
         let me = this;
@@ -339,21 +346,12 @@ AppDisplay.prototype = {
             this._addAppForId(appId);
         }
 
-        // Some applications, such as Evince, might not be in the menus,
-        // but might be returned by the applications monitor as most used
-        // applications, in which case we include them.
-        let mostUsedAppInfos = AppInfo.getMostUsedApps(MAX_ITEMS);
-        for (let i = 0; i < mostUsedAppInfos.length; i++) {
-            let appInfo = mostUsedAppInfos[i];
-            this._addApp(appInfo);
-        }         
-
         this._appsStale = false;
     },
 
     // Sets the list of the displayed items based on the most used apps.
     _setDefaultList : function() {
-        let matchedInfos = AppInfo.getMostUsedApps(MAX_ITEMS);
+        let matchedInfos = AppInfo.getTopApps(MAX_ITEMS);
         this._matchedItems = matchedInfos.map(function(info) { return info.appId; });
     },
 
@@ -430,3 +428,197 @@ AppDisplay.prototype = {
 };
 
 Signals.addSignalMethods(AppDisplay.prototype);
+
+function WellDisplayItem(appInfo, isFavorite) {
+    this._init(appInfo, isFavorite);
+}
+
+WellDisplayItem.prototype = {
+    _init : function(appInfo, isFavorite) {
+        this.appInfo = appInfo;
+
+        this.isFavorite = isFavorite;
+
+        this.actor = new Big.Box({ orientation: Big.BoxOrientation.VERTICAL,
+                                   width: APP_ICON_SIZE,
+                                   reactive: true });
+        this.actor._delegate = this;
+        this.actor.connect('button-release-event', Lang.bind(this, function (b, e) {
+            this.launch();
+            this.emit('activated');
+        }));
+
+        let draggable = DND.makeDraggable(this.actor);
+
+        this._icon = appInfo.createIcon(APP_ICON_SIZE);
+
+        this.actor.append(this._icon, Big.BoxPackFlags.NONE);
+
+        let count = Shell.AppMonitor.get_default().get_window_count(appInfo.appId);
+
+        this._name = new Clutter.Text({ color: GenericDisplay.ITEM_DISPLAY_NAME_COLOR,
+                                        font_name: "Sans 12px",
+                                        ellipsize: Pango.EllipsizeMode.END,
+                                        text: appInfo.name });
+        if (count > 0) {
+            let runningBox = new Big.Box({ /* border_color: GenericDisplay.ITEM_DISPLAY_NAME_COLOR,
+                                           border: 1,
+                                           padding: 1 */ });
+            runningBox.append(this._name, Big.BoxPackFlags.EXPAND);
+            this.actor.append(runningBox, Big.BoxPackFlags.NONE);
+        } else {
+            this.actor.append(this._name, Big.BoxPackFlags.NONE);
+        }
+    },
+
+    // Opens an application represented by this display item.
+    launch : function() {
+        this.appInfo.launch();
+    },
+
+    // Draggable interface - FIXME deduplicate with GenericDisplay
+    getDragActor: function(stageX, stageY) {
+        this.dragActor = this.appInfo.createIcon(APP_ICON_SIZE);
+
+        // If the user dragged from the icon itself, then position
+        // the dragActor over the original icon. Otherwise center it
+        // around the pointer
+        let [iconX, iconY] = this._icon.get_transformed_position();
+        let [iconWidth, iconHeight] = this._icon.get_transformed_size();
+        if (stageX > iconX && stageX <= iconX + iconWidth &&
+            stageY > iconY && stageY <= iconY + iconHeight)
+            this.dragActor.set_position(iconX, iconY);
+        else
+            this.dragActor.set_position(stageX - this.dragActor.width / 2, stageY - this.dragActor.height / 2);
+        return this.dragActor;
+    },
+
+    // Returns the original icon that is being used as a source for the cloned texture
+    // that represents the item as it is being dragged.
+    getDragActorSource: function() {
+        return this._icon;
+    }
+};
+
+Signals.addSignalMethods(WellDisplayItem.prototype);
+
+function WellArea(width, isFavorite) {
+    this._init(width, isFavorite);
+}
+
+WellArea.prototype = {
+    _init : function(width, isFavorite) {
+        this.isFavorite = isFavorite;
+
+        this.actor = new Tidy.Grid({ width: width });
+        this.actor._delegate = this;
+    },
+
+    redisplay: function (infos) {
+        let children;
+
+        children = this.actor.get_children();
+        children.forEach(Lang.bind(this, function (v) {
+            v.destroy();
+        }));
+
+        for (let i = 0; i < infos.length; i++) {
+            let display = new WellDisplayItem(infos[i], this.isFavorite);
+            display.connect('activated', Lang.bind(this, function (display) {
+                this.emit('activated', display);
+            }));
+            this.actor.add_actor(display.actor);
+        };
+    },
+
+    // Draggable target interface
+    acceptDrop : function(source, actor, x, y, time) {
+        let global = Shell.Global.get();
+
+        if (!(source instanceof WellDisplayItem)) {
+            return false;
+        }
+
+        let appSystem = Shell.AppSystem.get_default();
+        let id = source.appInfo.appId;
+        if (source.isFavorite && (!this.isFavorite)) {
+            Mainloop.idle_add(function () {
+                appSystem.remove_favorite(id);
+            });
+        } else if ((!source.isFavorite) && this.isFavorite) {
+            Mainloop.idle_add(function () {
+                appSystem.add_favorite(id);
+            });
+        } else {
+            return false;
+        }
+
+        return true;
+    }
+}
+
+Signals.addSignalMethods(WellArea.prototype);
+
+function AppWell(width) {
+    this._init(width);
+}
+
+AppWell.prototype = {
+    _init : function(width) {
+        this._menus = [];
+        this._menuDisplays = [];
+
+        this.actor = new Big.Box({ orientation: Big.BoxOrientation.VERTICAL,
+                                   width: width });
+
+        this._appSystem = Shell.AppSystem.get_default();
+        this._appMonitor = Shell.AppMonitor.get_default();
+
+        this._appSystem.connect('installed-changed', Lang.bind(this, function(appSys) {
+            this._redisplay();
+        }));
+        this._appSystem.connect('favorites-changed', Lang.bind(this, function(appSys) {
+            this._redisplay();
+        }));
+        this._appMonitor.connect('changed', Lang.bind(this, function(monitor) {
+            this._redisplay();
+        }));
+
+        this._favoritesArea = new WellArea(width, true);
+        this._favoritesArea.connect('activated', Lang.bind(this, function (a, display) {
+            this.emit('activated');
+        }));
+        this.actor.append(this._favoritesArea.actor, Big.BoxPackFlags.NONE);
+
+        this._runningBox = new Big.Box({ border_color: GenericDisplay.ITEM_DISPLAY_NAME_COLOR,
+                                         border: 1,
+                                         corner_radius: 3,
+                                         padding: GenericDisplay.PREVIEW_BOX_PADDING });
+        this._runningArea = new WellArea(width, false);
+        this._runningArea.connect('activated', Lang.bind(this, function (a, display) {
+            this.emit('activated');
+        }));
+        this._runningBox.append(this._runningArea.actor, Big.BoxPackFlags.EXPAND);
+        this.actor.append(this._runningBox, Big.BoxPackFlags.NONE);
+
+        this._redisplay();
+    },
+
+    _redisplay: function() {
+        let arrayToObject = function(a) {
+            let o = {};
+            for (let i = 0; i < a.length; i++)
+                o[a[i]] = 1;
+            return o;
+        };
+        let favorites = AppInfo.getFavorites();
+        let favoriteIds = arrayToObject(favorites.map(function (e) { return e.appId; }));
+        let running = AppInfo.getRunning().filter(function (e) {
+            return !(e.appId in favoriteIds);
+        });
+        this._favoritesArea.redisplay(favorites);
+        this._runningArea.redisplay(running);
+    }
+};
+
+Signals.addSignalMethods(AppWell.prototype);

js/ui/docDisplay.js

@@ -27,8 +27,7 @@ DocDisplayItem.prototype = {
         GenericDisplay.GenericDisplayItem.prototype._init.call(this, availableWidth);     
         this._docInfo = docInfo;
     
-        this._setItemInfo(docInfo.name, "",
-                          docInfo.getIcon(GenericDisplay.ITEM_DISPLAY_ICON_SIZE));
+        this._setItemInfo(docInfo.name, "");
     },
 
     //// Public methods ////
@@ -42,10 +41,15 @@ DocDisplayItem.prototype = {
 
     //// Protected method overrides ////
 
+    // Returns an icon for the item.
+    _createIcon : function() {
+        return this._docInfo.createIcon(GenericDisplay.ITEM_DISPLAY_ICON_SIZE);
+    },
+
     // Ensures the preview icon is created.
     _ensurePreviewIconCreated : function() {
         if (!this._previewIcon)
-            this._previewIcon = this._docInfo.getIcon(GenericDisplay.PREVIEW_ICON_SIZE);
+            this._previewIcon = this._docInfo.createIcon(GenericDisplay.PREVIEW_ICON_SIZE);
     },
 
     // Creates and returns a large preview icon, but only if this._docInfo is an image file

js/ui/genericDisplay.js

@@ -22,7 +22,7 @@ ITEM_DISPLAY_DESCRIPTION_COLOR.from_pixel(0xffffffbb);
 const ITEM_DISPLAY_BACKGROUND_COLOR = new Clutter.Color();
 ITEM_DISPLAY_BACKGROUND_COLOR.from_pixel(0x00000000);
 const ITEM_DISPLAY_SELECTED_BACKGROUND_COLOR = new Clutter.Color();
-ITEM_DISPLAY_SELECTED_BACKGROUND_COLOR.from_pixel(0x00ff0055);
+ITEM_DISPLAY_SELECTED_BACKGROUND_COLOR.from_pixel(0x4f6fadaa);
 const DISPLAY_CONTROL_SELECTED_COLOR = new Clutter.Color();
 DISPLAY_CONTROL_SELECTED_COLOR.from_pixel(0x112288ff);
 const PREVIEW_BOX_BACKGROUND_COLOR = new Clutter.Color();
@@ -30,7 +30,8 @@ PREVIEW_BOX_BACKGROUND_COLOR.from_pixel(0xADADADf0);
 
 const ITEM_DISPLAY_HEIGHT = 50;
 const ITEM_DISPLAY_ICON_SIZE = 48;
-const ITEM_DISPLAY_PADDING = 1;
+const ITEM_DISPLAY_PADDING_TOP = 1;
+const ITEM_DISPLAY_PADDING_RIGHT = 2;
 const DEFAULT_COLUMN_GAP = 6;
 const LABEL_HEIGHT = 16;
 
@@ -42,6 +43,8 @@ const PREVIEW_BOX_CORNER_RADIUS = 10;
 const PREVIEW_PLACING = 3/4;
 const PREVIEW_DETAILS_MIN_WIDTH = PREVIEW_ICON_SIZE * 2;
 
+const INFORMATION_BUTTON_SIZE = 16;
+
 /* This is a virtual class that represents a single display item containing
  * a name, a description, and an icon. It allows selecting an item and represents 
  * it by highlighting it with a different background color than the default.
@@ -55,22 +58,17 @@ function GenericDisplayItem(availableWidth) {
 GenericDisplayItem.prototype = {
     _init: function(availableWidth) {
         this._availableWidth = availableWidth;
-        this._showPreview = false;
-        this._havePointer = false; 
-        this._previewEventSourceId = null;
 
         this.actor = new Clutter.Group({ reactive: true,
                                          width: availableWidth,
                                          height: ITEM_DISPLAY_HEIGHT });
         this.actor._delegate = this;
-        this.actor.connect('button-press-event',
-                           Lang.bind(this,
-                                     function(actor, e) {
-                                         let clickCount = Shell.get_button_event_click_count(e);
-                                         if (clickCount == 1)
-                                             this.select();
-                                         else if (clickCount == 2)
-                                             this.activate();
+        this.actor.connect('button-release-event', 
+                           Lang.bind(this, 
+                                     function() {
+                                         // Activates the item by launching it
+                                         this.emit('activate');
+                                         return true;  
                                      }));
 
         let draggable = DND.makeDraggable(this.actor);
@@ -81,11 +79,40 @@ GenericDisplayItem.prototype = {
                                  x: 0, y: 0,
                                  width: availableWidth, height: ITEM_DISPLAY_HEIGHT });
         this.actor.add_actor(this._bg);
-        
+
+        let global = Shell.Global.get();
+        let infoIconUri = "file://" + global.imagedir + "info.svg";
+
+        this._informationButton = Shell.TextureCache.get_default().load_uri_sync(infoIconUri, 
+                                                                                 INFORMATION_BUTTON_SIZE,
+                                                                                 INFORMATION_BUTTON_SIZE);
+
+        this._informationButton.x = availableWidth - ITEM_DISPLAY_PADDING_RIGHT - INFORMATION_BUTTON_SIZE;
+        this._informationButton.y = ITEM_DISPLAY_HEIGHT / 2 - INFORMATION_BUTTON_SIZE / 2; 
+        this._informationButton.reactive = true;
+
+        // Connecting to the button-press-event for the information button ensures that the actor, 
+        // which is a draggable actor, does not get the button-press-event and doesn't initiate
+        // the dragging, which then prevents us from getting the button-release-event for the button.
+        this._informationButton.connect('button-press-event', 
+                                        Lang.bind(this,
+                                                  function() {
+                                                      return true;
+                                                  }));
+        this._informationButton.connect('button-release-event',
+                                        Lang.bind(this, 
+                                                  function() {
+                                                      // Selects the item by highlighting it and displaying its details
+                                                      this.emit('select');
+                                                      return true;  
+                                                  }));
+        this._informationButton.hide();
+        this.actor.add_actor(this._informationButton);
+        this._informationButton.lower_bottom();
+
         this._name = null;
         this._description = null;
         this._icon = null;
-        this._preview = null;
         this._previewIcon = null; 
 
         this.dragActor = null;
@@ -99,8 +126,7 @@ GenericDisplayItem.prototype = {
     // Returns a cloned texture of the item's icon to represent the item as it 
     // is being dragged. 
     getDragActor: function(stageX, stageY) {
-        this.dragActor = new Clutter.Clone({ source: this._icon });
-        [this.dragActor.width, this.dragActor.height] = this._icon.get_transformed_size();
+        this.dragActor = this._createIcon();
 
         // If the user dragged from the icon itself, then position
         // the dragActor over the original icon. Otherwise center it
@@ -115,58 +141,19 @@ GenericDisplayItem.prototype = {
         return this.dragActor;
     },
     
-    // Returns the original icon that is being used as a source for the cloned texture
-    // that represents the item as it is being dragged.
+    // Returns the item icon, a separate copy of which is used to
+    // represent the item as it is being dragged. This is used to
+    // determine a snap-back location for the drag icon if it does
+    // not get accepted by any drop target.
     getDragActorSource: function() {
         return this._icon;
     },
 
     //// Public methods ////
 
-    // Sets a boolean value that indicates whether the item should display a pop-up preview on mouse over.
-    setShowPreview: function(showPreview) {
-        this._showPreview = showPreview;
-    },
-
-    // Returns a boolean value that indicates whether the item displays a pop-up preview on mouse over.
-    getShowPreview: function() {
-        return this._showPreview;
-    },
-
-    // Displays the preview for the item.
-    showPreview: function() {
-        if(!this._showPreview)
-            return;
-
-        this._ensurePreviewCreated();
-
-        let [x, y] = this.actor.get_transformed_position();
-        let global = Shell.Global.get();
-        let previewX = Math.min(x + this._availableWidth * PREVIEW_PLACING, global.screen_width - this._preview.width);
-        let previewY = Math.min(y, global.screen_height - this._preview.height);
-        this._preview.set_position(previewX, previewY);
-
-        this._preview.show();
-    },
-
-    // Hides the preview for the item and removes the preview event source so that 
-    // there is no preview scheduled to show up.
-    hidePreview: function() {
-        if (this._previewEventSourceId) {
-            Mainloop.source_remove(this._previewEventSourceId);
-            this._previewEventSourceId = null;
-        }
-
-        if (this._preview)
-            this._preview.hide();
-    },
-
-    // Shows a preview when the item was drawn under the mouse pointer.
+    // Shows the information button when the item was drawn under the mouse pointer.
     onDrawnUnderPointer: function() {
-        this._havePointer = true;
-        // This code is usually triggered when we just had a different preview showing on the same spot
-        // and having a delay before showing a new preview looks bad. So we just show it right away.
-        this.showPreview();  
+        this._informationButton.show();  
     },
 
     // Highlights the item by setting a different background color than the default 
@@ -180,17 +167,6 @@ GenericDisplayItem.prototype = {
        this._bg.background_color = color;
     },
 
-    // Activates the item, as though it was launched
-    activate: function() {
-        this.hidePreview();
-        this.emit('activate');
-    },
-
-    // Selects the item, as though it was clicked
-    select: function() {
-        this.emit('select');
-    },
-
     /*
      * Returns an actor containing item details. In the future details can have more information than what 
      * the preview pop-up has and be item-type specific.
@@ -199,7 +175,7 @@ GenericDisplayItem.prototype = {
      * availableHeight - height available for displaying details
      */ 
     createDetailsActor: function(availableWidth, availableHeight) {
-
+ 
         let details = new Big.Box({ orientation: Big.BoxOrientation.VERTICAL,
                                     spacing: PREVIEW_BOX_SPACING,
                                     width: availableWidth });
@@ -241,28 +217,12 @@ GenericDisplayItem.prototype = {
             details.append(largePreview, Big.BoxPackFlags.NONE);
         }
    
-        // We hide the preview pop-up if the details are shown elsewhere. 
-        details.connect("show", 
-                        Lang.bind(this, 
-                                  function() {
-                                          // Right now "show" signal is emitted when an actor is added to a parent that
-                                          // has not been added to anything and "visible" property is also set to true 
-                                          // at this point, so checking if the parent that the actor has been added to  
-                                          // has a parent of its own is a temporary workaround. That other actor is 
-                                          // presumed to be displayed, which is a limitation of this workaround, but is
-                                          // the case with our usage of the details actor now.         
-                                          // http://bugzilla.openedhand.com/show_bug.cgi?id=1138
-                                          if (details.get_parent() != null && details.get_parent().get_parent() != null)
-                                              this.hidePreview();
-                                  }));
         return details;
     },
 
-    // Destoys the item, as well as a preview for the item if it exists.
+    // Destoys the item.
     destroy: function() {
       this.actor.destroy();
-      if (this._preview != null)
-          this._preview.destroy();
     },
     
     //// Pure virtual public methods ////
@@ -279,9 +239,8 @@ GenericDisplayItem.prototype = {
      *
      * nameText - name of the item
      * descriptionText - short description of the item
-     * iconActor - ClutterTexture containing the icon image which should be ITEM_DISPLAY_ICON_SIZE size
      */
-    _setItemInfo: function(nameText, descriptionText, iconActor) {
+    _setItemInfo: function(nameText, descriptionText) {
         if (this._name != null) {
             // this also removes this._name from the parent container,
             // so we don't need to call this.actor.remove_actor(this._name) directly
@@ -298,27 +257,23 @@ GenericDisplayItem.prototype = {
             this._icon.destroy();
             this._icon = null;
         } 
-        // This ensures we'll create a new preview and previewIcon next time we need a preview
-        if (this._preview != null) {
-            this._preview.destroy();
-            this._preview = null;
-        }
+        // This ensures we'll create a new previewIcon next time we need it
         if (this._previewIcon != null) {
             this._previewIcon.destroy();
             this._previewIcon = null;
         }
 
-        this._icon = iconActor;
+        this._icon = this._createIcon();
         this.actor.add_actor(this._icon);
 
-        let textWidth = this._availableWidth - (ITEM_DISPLAY_ICON_SIZE + 4);
+        let textWidth = this._availableWidth - (ITEM_DISPLAY_ICON_SIZE + 4) - INFORMATION_BUTTON_SIZE - ITEM_DISPLAY_PADDING_RIGHT;
         this._name = new Clutter.Text({ color: ITEM_DISPLAY_NAME_COLOR,
                                         font_name: "Sans 14px",
                                         width: textWidth,
                                         ellipsize: Pango.EllipsizeMode.END,
                                         text: nameText,
                                         x: ITEM_DISPLAY_ICON_SIZE + 4,
-                                        y: ITEM_DISPLAY_PADDING });
+                                        y: ITEM_DISPLAY_PADDING_TOP });
         this.actor.add_actor(this._name);
         this._description = new Clutter.Text({ color: ITEM_DISPLAY_DESCRIPTION_COLOR,
                                                font_name: "Sans 12px",
@@ -339,6 +294,11 @@ GenericDisplayItem.prototype = {
 
     //// Pure virtual protected methods ////
 
+    // Returns an icon for the item.
+    _createIcon: function() {
+        throw new Error("Not implemented");
+    },
+
     // Ensures the preview icon is created.
     _ensurePreviewIconCreated: function() {
         throw new Error("Not implemented");
@@ -346,79 +306,21 @@ GenericDisplayItem.prototype = {
 
     //// Private methods ////
 
-    // Ensures the preview actor is created.
-    _ensurePreviewCreated: function() {
-        if (!this._showPreview || this._preview)
-            return;
-
-        this._preview = new Big.Box({ background_color: PREVIEW_BOX_BACKGROUND_COLOR,
-                                      orientation: Big.BoxOrientation.HORIZONTAL,
-                                      corner_radius: PREVIEW_BOX_CORNER_RADIUS,
-                                      padding: PREVIEW_BOX_PADDING,
-                                      spacing: PREVIEW_BOX_SPACING });
-
-        let textDetailsWidth = this._availableWidth - PREVIEW_BOX_PADDING * 2;
-
-        this._ensurePreviewIconCreated();
-
-        if (this._previewIcon != null) {
-            this._preview.append(this._previewIcon, Big.BoxPackFlags.EXPAND);
-            textDetailsWidth = this._availableWidth - this._previewIcon.width - PREVIEW_BOX_PADDING * 2 - PREVIEW_BOX_SPACING;
-        }
-
-	// Inner box with name and description
-        let textDetails = new Big.Box({ orientation: Big.BoxOrientation.VERTICAL,
-                                        spacing: PREVIEW_BOX_SPACING });
-        let detailsName = new Clutter.Text({ color: ITEM_DISPLAY_NAME_COLOR,
-                                             font_name: "Sans bold 14px",
-                                             text: this._name.text});
-
-        textDetails.width = Math.max(PREVIEW_DETAILS_MIN_WIDTH, textDetailsWidth, detailsName.width);
-
-        textDetails.append(detailsName, Big.BoxPackFlags.NONE);
-
-        let detailsDescription = new Clutter.Text({ color: ITEM_DISPLAY_NAME_COLOR,
-                                                    font_name: "Sans 14px",
-                                                    line_wrap: true,
-                                                    text: this._description.text });
-        textDetails.append(detailsDescription, Big.BoxPackFlags.NONE);
-
-        this._preview.append(textDetails, Big.BoxPackFlags.EXPAND);
-
-        // Add the preview to global stage to allow for top-level layering
-        let global = Shell.Global.get();
-        global.stage.add_actor(this._preview);
-        this._preview.hide();
-    },
-
-    // Performs actions on mouse enter event for the item. Currently, shows the preview for the item.
+    // Performs actions on mouse enter event for the item. Currently, shows the information button for the item.
     _onEnter: function(actor, event) {
-        this._havePointer = true;
-        let tooltipTimeout = Gtk.Settings.get_default().gtk_tooltip_timeout;
-        this._previewEventSourceId = Mainloop.timeout_add(tooltipTimeout, 
-                                                          Lang.bind(this,
-                                                                    function() {
-                                                                        if (this._havePointer) {
-                                                                            this.showPreview();
-                                                                        }
-                                                                        this._previewEventSourceId = null;
-                                                                        return false;
-                                                                    }));
+        this._informationButton.show();
     },
 
-    // Performs actions on mouse leave event for the item. Currently, hides the preview for the item.
+    // Performs actions on mouse leave event for the item. Currently, hides the information button for the item.
     _onLeave: function(actor, event) {
-        this._havePointer = false;
-        this.hidePreview();
+        this._informationButton.hide();
     },
 
-    // Hides the preview once the item starts being dragged.
+    // Hides the information button once the item starts being dragged.
     _onDragBegin : function (draggable, time) {
         // For some reason, we are not getting leave-event signal when we are dragging an item,
-        // so the preview box stays behind if we didn't have the call here. It makes sense to hide  
-        // the preview as soon as the item starts being dragged anyway.
-        this._havePointer = false;  
-        this.hidePreview();
+        // so we should remove the link manually.
+        this._informationButton.hide();
     } 
 };
 
@@ -469,8 +371,6 @@ GenericDisplay.prototype = {
         // See also getSideArea.
         this.actor = this._grid;
         this.displayControl = new Big.Box({ background_color: ITEM_DISPLAY_BACKGROUND_COLOR,
-                                            corner_radius: 4,
-                                            height: 24,
                                             spacing: 12,
                                             orientation: Big.BoxOrientation.HORIZONTAL});
 
@@ -557,14 +457,6 @@ GenericDisplay.prototype = {
         this._selectIndex(-1);
     },
 
-    // Hides the preview if any item has one being displayed.
-    hidePreview: function() {
-        for (itemId in this._displayedItems) {
-            let item = this._displayedItems[itemId];
-            item.hidePreview();
-        }
-    },
-
     // Returns true if the display has any displayed items.
     hasItems: function() {
         return this._displayedItemsCount > 0;
@@ -645,13 +537,13 @@ GenericDisplay.prototype = {
         Mainloop.timeout_add(5, 
                              Lang.bind(this,
                                        function() {
-                                           // Check if the pointer is over one of the items and display the preview pop-up if it is.
+                                           // Check if the pointer is over one of the items and display the information button if it is.
                                            let [child, x, y, mask] = Gdk.Screen.get_default().get_root_window().get_pointer();
                                            let global = Shell.Global.get();
                                            let actor = global.stage.get_actor_at_pos(Clutter.PickMode.REACTIVE,
                                                                                      x, y);
                                            if (actor != null) {
-                                               let item = this._findDisplayedByActor(actor.get_parent());
+                                               let item = this._findDisplayedByActor(actor);
                                                if (item != null) {
                                                    item.onDrawnUnderPointer();
                                                }
@@ -670,7 +562,6 @@ GenericDisplay.prototype = {
 
         let itemInfo = this._allItems[itemId];
         let displayItem = this._createDisplayItem(itemInfo);
-        displayItem.setShowPreview(true);
 
         displayItem.connect('activate', 
                             Lang.bind(this,
@@ -702,32 +593,8 @@ GenericDisplay.prototype = {
             this.selectUp();
         } 
 
-        if (displayItem.dragActor) {
-            // The user might be handling a dragActor when the list of items 
-            // changes (for example, if the dragging caused us to transition
-            // from an expanded overlay view to the regular view). So we need
-            // to keep the item around so that the drag and drop action initiated
-            // by the user can be completed. However, we remove the item from the list.
-            // 
-            // For some reason, just removing the displayItem.actor
-            // is not enough to get displayItem._icon.visible
-            // to return false, so we hide the display item and
-            // all its children first. (We check displayItem._icon.visible
-            // when deciding if a dragActor has a place to snap back to
-            // in case the drop was not accepted by any actor.)
-            displayItem.actor.hide_all();
-            this._grid.remove_actor(displayItem.actor);
-            // We should not destroy the item up-front, because that would also
-            // destroy the icon that was used to clone the image for the drag actor.
-            // We destroy it once the dragActor is destroyed instead.             
-            displayItem.dragActor.connect('destroy',
-                                          function(item) {
-                                              displayItem.destroy();
-                                          });
-           
-        } else {
-            displayItem.destroy();
-        }
+        displayItem.destroy();
+
         delete this._displayedItems[itemId];
         this._displayedItemsCount--;        
     },

js/ui/widget.js

@@ -182,7 +182,7 @@ LauncherWidget.prototype = {
                                  spacing: ITEM_SPACING,
                                  reactive: true });
         item._info = info;
-        item.append(info.getIcon(ITEM_ICON_SIZE), Big.BoxPackFlags.NONE);
+        item.append(info.createIcon(ITEM_ICON_SIZE), Big.BoxPackFlags.NONE);
         item.append(new Clutter.Text({ color: ITEM_NAME_COLOR,
                                        font_name: "Sans 14px",
                                        ellipsize: Pango.EllipsizeMode.END,
@@ -203,7 +203,7 @@ LauncherWidget.prototype = {
                              padding: ITEM_PADDING,
                              reactive: true });
         item._info = info;
-        item.append(info.getIcon(COLLAPSED_WIDTH - 2 * ITEM_PADDING),
+        item.append(info.createIcon(COLLAPSED_WIDTH - 2 * ITEM_PADDING),
                     Big.BoxPackFlags.NONE);
 
         this.collapsedActor.append(item, Big.BoxPackFlags.NONE);
@@ -284,7 +284,7 @@ AppsWidget.prototype = {
         this.actor = new Big.Box({ spacing: 2 });
         this.collapsedActor = new Big.Box({ spacing: 2});
 
-        let apps = AppInfo.getMostUsedApps(5);
+        let apps = AppInfo.getTopApps(5);
         for (let i = 0; i < apps.length; i++)
             this.addItem(apps[i]);
     }

js/ui/workspaces.js

@@ -11,6 +11,7 @@ const Pango = imports.gi.Pango;
 const Shell = imports.gi.Shell;
 const Signals = imports.signals;
 
+const AppDisplay = imports.ui.appDisplay;
 const DND = imports.ui.dnd;
 const GenericDisplay = imports.ui.genericDisplay;
 const Main = imports.ui.main;
@@ -752,7 +753,7 @@ Workspace.prototype = {
                                                  false, // don't create workspace
                                                  time);
             return true;
-        } else if (source instanceof GenericDisplay.GenericDisplayItem) {
+        } else if (source instanceof GenericDisplay.GenericDisplayItem || source instanceof AppDisplay.WellDisplayItem) {
             this._metaWorkspace.activate(time);
             source.launch();
             return true;

src/shell-app-monitor.c

@@ -13,9 +13,11 @@
 
 
 #include "shell-app-monitor.h"
+#include "shell-app-system.h"
 #include "shell-global.h"
 
 #include "display.h"
+#include "window.h"
 
 /* This file includes modified code from
  * desktop-data-engine/engine-dbus/hippo-application-monitor.c
@@ -63,6 +65,7 @@ static struct
   const char *pattern;
   GRegex *regex;
 } title_patterns[] =  {
+    {"mozilla-firefox", ".* - Mozilla Firefox", NULL}, \
     {"openoffice.org-writer", ".* - OpenOffice.org Writer$", NULL}, \
     {"openoffice.org-calc", ".* - OpenOffice.org Calc$", NULL}, \
     {"openoffice.org-impress", ".* - OpenOffice.org Impress$", NULL}, \
@@ -93,6 +96,12 @@ struct _ShellAppMonitor
   gboolean currently_idle;
   gboolean enable_monitoring;
 
+  /* <char * appid, guint window_count> */
+  GHashTable *running_appids;
+
+  /* <MetaWindow * window, char * appid> */
+  GHashTable *window_to_appid;
+
   GHashTable *apps_by_wm_class; /* Seen apps by wm_class */
   GHashTable *popularities; /* One AppPopularity struct list per activity */
   int upload_apps_burst_count;
@@ -191,6 +200,232 @@ destroy_popularity (gpointer key,
   g_slist_free (list);
 }
 
+static char *
+get_wmclass_for_window (MetaWindow   *window)
+{
+  static gboolean patterns_initialized = FALSE;
+  const char *wm_class;
+  char *title;
+  int i;
+
+  wm_class = meta_window_get_wm_class (window);
+  g_object_get (window, "title", &title, NULL);
+
+  if (!patterns_initialized) /* Generate match patterns once for all */
+    {
+      patterns_initialized = TRUE;
+      for (i = 0; title_patterns[i].app_id; i++)
+        {
+          title_patterns[i].regex = g_regex_new (title_patterns[i].pattern,
+                                                 0, 0, NULL);
+        }
+    }
+
+  /* Match window title patterns to identifiers for non-standard apps */
+  if (title)
+    {
+      for (i = 0; title_patterns[i].app_id; i++)
+        {
+          if (g_regex_match (title_patterns[i].regex, title, 0, NULL))
+            {
+              /* Set a pseudo WM class, handled like true ones */
+              wm_class = title_patterns[i].app_id;
+              break;
+            }
+        }
+    }
+
+  g_free (title);
+  return g_strdup (wm_class);
+}
+
+/**
+ * get_cleaned_wmclass_for_window:
+ *
+ * A "cleaned" wmclass is the WM_CLASS property of a window,
+ * after some transformations to turn it into a form
+ * somewhat more resilient to changes, such as lowercasing.
+ */
+static char *
+get_cleaned_wmclass_for_window (MetaWindow  *window)
+{
+  char *wmclass;
+  char *cleaned_wmclass;
+
+  if (meta_window_get_window_type (window) != META_WINDOW_NORMAL)
+    return NULL;
+
+  wmclass = get_wmclass_for_window (window);
+  if (!wmclass)
+    return NULL;
+
+  cleaned_wmclass = g_utf8_strdown (wmclass, -1);
+  g_free (wmclass);
+  /* This handles "Fedora Eclipse", probably others */
+  g_strdelimit (cleaned_wmclass, " ", '-');
+  wmclass = g_strdup (cleaned_wmclass);
+  g_free (cleaned_wmclass);
+  return wmclass;
+}
+
+/**
+ * get_appid_for_window:
+ *
+ * Returns a desktop file ID for an application, or %NULL if
+ * we're unable to determine one.
+ */
+static char *
+get_appid_for_window (MetaWindow     *window)
+{
+  char *wmclass;
+  char *with_desktop;
+  char *result;
+  ShellAppSystem *appsys;
+
+  wmclass = get_cleaned_wmclass_for_window (window);
+
+  if (!wmclass)
+    return NULL;
+
+  with_desktop = g_strjoin (NULL, wmclass, ".desktop", NULL);
+  g_free (wmclass);
+
+  appsys = shell_app_system_get_default ();
+  result = shell_app_system_lookup_basename (appsys, with_desktop);
+  g_free (with_desktop);
+
+  return result;
+}
+
+static void
+track_window (ShellAppMonitor *self,
+              MetaWindow      *window)
+{
+  char *appid;
+  guint window_count;
+
+  appid = get_appid_for_window (window);
+  if (!appid)
+    return;
+
+  g_hash_table_insert (self->window_to_appid, window, appid);
+
+  window_count = GPOINTER_TO_UINT (g_hash_table_lookup (self->running_appids, appid));
+
+  window_count += 1;
+  g_hash_table_insert (self->running_appids, g_strdup (appid), GUINT_TO_POINTER (window_count));
+  if (window_count == 1)
+    g_signal_emit (self, signals[CHANGED], 0);
+}
+
+static void
+shell_app_monitor_on_window_added (MetaWorkspace   *workspace,
+                                   MetaWindow      *window,
+                                   gpointer         user_data)
+{
+  ShellAppMonitor *self = SHELL_APP_MONITOR (user_data);
+
+  track_window (self, window);
+}
+
+static void
+shell_app_monitor_on_window_removed (MetaWorkspace   *workspace,
+                                     MetaWindow      *window,
+                                     gpointer         user_data)
+{
+  ShellAppMonitor *self = SHELL_APP_MONITOR (user_data);
+  char *appid;
+  guint window_count;
+
+  appid = g_hash_table_lookup (self->window_to_appid, window);
+  if (!appid)
+    return;
+
+  window_count = GPOINTER_TO_UINT (g_hash_table_lookup (self->running_appids, appid));
+
+  window_count -= 1;
+  if (window_count == 0)
+    {
+      g_hash_table_remove (self->running_appids, appid);
+      g_free (appid);
+      g_signal_emit (self, signals[CHANGED], 0);
+    }
+  else
+    {
+      g_hash_table_insert (self->running_appids, appid, GUINT_TO_POINTER (window_count));
+    }
+  g_hash_table_remove (self->window_to_appid, window);
+}
+
+static void
+load_initial_windows (ShellAppMonitor *monitor)
+{
+  GList *workspaces, *iter;
+  MetaScreen *screen = shell_global_get_screen (shell_global_get ());
+  workspaces = meta_screen_get_workspaces (screen);
+
+  for (iter = workspaces; iter; iter = iter->next)
+    {
+      MetaWorkspace *workspace = iter->data;
+      GList *windows = meta_workspace_list_windows (workspace);
+      GList *window_iter;
+
+      for (window_iter = windows; window_iter; window_iter = window_iter->next)
+        track_window (monitor, (MetaWindow*)window_iter->data);
+
+      g_list_free (windows);
+    }
+}
+
+guint
+shell_app_monitor_get_window_count (ShellAppMonitor *self,
+                                    const char      *appid)
+{
+  return GPOINTER_TO_UINT (g_hash_table_lookup (self->running_appids, appid));
+}
+
+static void
+shell_app_monitor_on_n_workspaces_changed (MetaScreen    *screen,
+                                           GParamSpec    *pspec,
+                                           gpointer       user_data)
+{
+  ShellAppMonitor *self = SHELL_APP_MONITOR (user_data);
+  GList *workspaces, *iter;
+
+  workspaces = meta_screen_get_workspaces (screen);
+
+  for (iter = workspaces; iter; iter = iter->next)
+    {
+      MetaWorkspace *workspace = iter->data;
+
+      /* This pair of disconnect/connect is idempotent if we were
+       * already connected, while ensuring we get connected for
+       * new workspaces.
+       */
+      g_signal_handlers_disconnect_by_func (workspace,
+                                            shell_app_monitor_on_window_added,
+                                            self);
+      g_signal_handlers_disconnect_by_func (workspace,
+                                            shell_app_monitor_on_window_removed,
+                                            self);
+
+      g_signal_connect (workspace, "window-added",
+                        G_CALLBACK (shell_app_monitor_on_window_added), self);
+      g_signal_connect (workspace, "window-removed",
+                        G_CALLBACK (shell_app_monitor_on_window_removed), self);
+    }
+}
+
+static void
+init_window_monitoring (ShellAppMonitor *self)
+{
+  MetaScreen *screen = shell_global_get_screen (shell_global_get ());
+
+  g_signal_connect (screen, "notify::n-workspaces",
+                    G_CALLBACK (shell_app_monitor_on_n_workspaces_changed), self);
+  shell_app_monitor_on_n_workspaces_changed (screen, NULL, self);
+}
+
 static void
 shell_app_monitor_init (ShellAppMonitor *self)
 {
@@ -223,6 +458,15 @@ shell_app_monitor_init (ShellAppMonitor *self)
                                                   (GDestroyNotify) g_free,
                                                   (GDestroyNotify) g_free);
 
+  self->running_appids = g_hash_table_new_full (g_str_hash, g_str_equal,
+                                                g_free, NULL);
+
+  self->window_to_appid = g_hash_table_new_full (g_direct_hash, g_direct_equal,
+                                                 NULL, (GDestroyNotify) g_free);
+
+  load_initial_windows (self);
+  init_window_monitoring (self);
+
   g_object_get (shell_global_get(), "configdir", &shell_config_dir, NULL),
   path = g_build_filename (shell_config_dir, DATA_FILENAME, NULL);
   g_free (shell_config_dir);
@@ -299,16 +543,31 @@ shell_app_monitor_get_most_used_apps (ShellAppMonitor *monitor,
   return list;
 }
 
-/* Find the active window in order to collect stats */
-void
-get_active_app_properties (ShellAppMonitor *monitor,
-                           char           **wm_class,
-                           char           **title)
+/**
+ * shell_app_monitor_get_running_app_ids:
+ *
+ * @monitor: An app monitor instance
+ *
+ * Returns: (element-type utf8) (transfer container): List of application desktop
+ *     identifiers
+ */
+GList *
+shell_app_monitor_get_running_app_ids (ShellAppMonitor *monitor)
 {
+  return g_hash_table_get_keys (monitor->running_appids);
+}
+
+void
+update_app_info (ShellAppMonitor *monitor)
+{
+  char *wm_class;
   ShellGlobal *global;
+  GHashTable *app_active_times = NULL; /* last active time for an application */
   MetaScreen *screen;
   MetaDisplay *display;
   MetaWindow *active;
+  int activity;
+  guint32 timestamp;
 
   global = shell_global_get ();
   g_object_get (global, "screen", &screen, NULL);
@@ -317,60 +576,14 @@ get_active_app_properties (ShellAppMonitor *monitor,
 
   active = meta_display_get_focus_window (display);
 
-  if (wm_class)
-    *wm_class = NULL;
-  if (title)
-    *title = NULL;
-
   if (active == NULL)
     return;
 
-  *wm_class = g_strdup (meta_window_get_wm_class (active));
-  g_object_get (active, "title", title, NULL);
-}
+  wm_class = get_cleaned_wmclass_for_window (active);
 
-void
-update_app_info (ShellAppMonitor *monitor)
-{
-  char *wm_class;
-  char *title;
-  GHashTable *app_active_times = NULL; /* GTime spent per activity */
-  static gboolean first_time = TRUE;
-  int activity;
-  guint32 timestamp;
-  int i;
-  
-  if (first_time) /* Generate match patterns once for all */
-    {
-      first_time = FALSE;
-      for (i = 0; title_patterns[i].app_id; i++)
-        {
-          title_patterns[i].regex = g_regex_new (title_patterns[i].pattern,
-                                                 0, 0, NULL);
-        }
-    }
-
-  get_active_app_properties (monitor, &wm_class, &title);
-
-  /* Match window title patterns to identifiers for non-standard apps */
-  if (title)
-    {
-      for (i = 0; title_patterns[i].app_id; i++)
-        {
-          if ( g_regex_match (title_patterns[i].regex, title, 0, NULL) )
-            {
-              /* Set a pseudo WM class, handled like true ones */
-              g_free (wm_class);              
-              wm_class = g_strdup(title_patterns[i].app_id);
-              break;
-            }
-        }
-      g_free (title);
-    }  
-  
   if (!wm_class)
     return;
-  
+
   app_active_times = g_hash_table_lookup (monitor->apps_by_wm_class, wm_class);
   if (!app_active_times)
     {

src/shell-app-monitor.h

@@ -40,9 +40,10 @@ GSList *shell_app_monitor_get_most_used_apps (ShellAppMonitor *monitor,
                                               int              activity,
                                               gint             number);
 
+guint shell_app_monitor_get_window_count (ShellAppMonitor *monitor, const char *appid);
+
 /* Get whatever's running right now */
-GSList *shell_app_monitor_get_running_apps (ShellAppMonitor *monitor,
-                                            int              activity);
+GList *shell_app_monitor_get_running_app_ids (ShellAppMonitor *monitor);
 
 G_END_DECLS
 

src/shell-app-system.c

@@ -1,19 +1,25 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
 
 #include "shell-app-system.h"
+#include <string.h>
 
 #include <gio/gio.h>
+#include <gconf/gconf.h>
+#include <gconf/gconf-client.h>
 
 #define GMENU_I_KNOW_THIS_IS_UNSTABLE
 #include <gmenu-tree.h>
 
+#define SHELL_APP_FAVORITES_KEY "/desktop/gnome/shell/favorite_apps"
+
 enum {
    PROP_0,
 
 };
 
 enum {
-  CHANGED,
+  INSTALLED_CHANGED,
+  FAVORITES_CHANGED,
   LAST_SIGNAL
 };
 
@@ -26,11 +32,17 @@ struct _ShellAppSystemPrivate {
   GSList *cached_app_menus; /* ShellAppMenuEntry */
 
   GSList *cached_setting_ids; /* utf8 */
+
+  GHashTable *cached_favorites; /* <utf8,integer> */
+
+  gint app_monitor_id;
 };
 
 static void shell_app_system_finalize (GObject *object);
 static void on_tree_changed (GMenuTree *tree, gpointer user_data);
 static void reread_menus (ShellAppSystem *self);
+static void on_favorite_apps_changed (GConfClient *client, guint id, GConfEntry *entry, gpointer user_data);
+static void reread_favorite_apps (ShellAppSystem *system);
 
 G_DEFINE_TYPE(ShellAppSystem, shell_app_system, G_TYPE_OBJECT);
 
@@ -63,14 +75,22 @@ static void shell_app_system_class_init(ShellAppSystemClass *klass)
 
   gobject_class->finalize = shell_app_system_finalize;
 
-  signals[CHANGED] =
-    g_signal_new ("changed",
+  signals[INSTALLED_CHANGED] =
+    g_signal_new ("installed-changed",
 		  SHELL_TYPE_APP_SYSTEM,
 		  G_SIGNAL_RUN_LAST,
-		  G_STRUCT_OFFSET (ShellAppSystemClass, changed),
+		  G_STRUCT_OFFSET (ShellAppSystemClass, installed_changed),
 		  NULL, NULL,
 		  g_cclosure_marshal_VOID__VOID,
 		  G_TYPE_NONE, 0);
+  signals[FAVORITES_CHANGED] =
+    g_signal_new ("favorites-changed",
+                  SHELL_TYPE_APP_SYSTEM,
+                  G_SIGNAL_RUN_LAST,
+                  G_STRUCT_OFFSET (ShellAppSystemClass, favorites_changed),
+                  NULL, NULL,
+                  g_cclosure_marshal_VOID__VOID,
+                  G_TYPE_NONE, 0);
 
   g_type_class_add_private (gobject_class, sizeof (ShellAppSystemPrivate));
 }
@@ -79,10 +99,16 @@ static void
 shell_app_system_init (ShellAppSystem *self)
 {
   ShellAppSystemPrivate *priv;
+  GConfClient *client;
+
   self->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
                                                    SHELL_TYPE_APP_SYSTEM,
                                                    ShellAppSystemPrivate);
 
+  priv->cached_favorites = g_hash_table_new_full (g_str_hash, g_str_equal,
+                                                  (GDestroyNotify)g_free,
+                                                  NULL);
+
   priv->apps_tree = gmenu_tree_lookup ("applications.menu", GMENU_TREE_FLAGS_NONE);
   priv->settings_tree = gmenu_tree_lookup ("settings.menu", GMENU_TREE_FLAGS_NONE);
 
@@ -90,6 +116,12 @@ shell_app_system_init (ShellAppSystem *self)
   gmenu_tree_add_monitor (priv->settings_tree, on_tree_changed, self);
 
   reread_menus (self);
+
+  client = gconf_client_get_default ();
+
+  self->priv->app_monitor_id = gconf_client_notify_add (client, SHELL_APP_FAVORITES_KEY,
+                                                        on_favorite_apps_changed, self, NULL, NULL);
+  reread_favorite_apps (self);
 }
 
 static void
@@ -112,13 +144,16 @@ shell_app_system_finalize (GObject *object)
   g_slist_free (priv->cached_setting_ids);
   priv->cached_setting_ids = NULL;
 
+  g_hash_table_destroy (priv->cached_favorites);
+
+  gconf_client_notify_remove (gconf_client_get_default (), priv->app_monitor_id);
+
   G_OBJECT_CLASS (shell_app_system_parent_class)->finalize(object);
 }
 
 static void
 reread_directories (ShellAppSystem *self, GSList **cache, GMenuTree *tree)
 {
-  ShellAppSystemPrivate *priv = self->priv;
   GMenuTreeDirectory *trunk;
   GSList *entries;
   GSList *iter;
@@ -228,11 +263,58 @@ on_tree_changed (GMenuTree *monitor, gpointer user_data)
 {
   ShellAppSystem *self = SHELL_APP_SYSTEM (user_data);
 
-  g_signal_emit (self, signals[CHANGED], 0);
+  g_signal_emit (self, signals[INSTALLED_CHANGED], 0);
 
   reread_menus (self);
 }
 
+static void
+copy_gconf_value_string_list_to_hashset (GConfValue *value,
+                                         GHashTable *dest)
+{
+  GSList *list;
+  GSList *tmp;
+
+  list = gconf_value_get_list (value);
+
+  for (tmp = list ; tmp; tmp = tmp->next)
+    {
+      GConfValue *value = tmp->data;
+      char *str = g_strdup (gconf_value_get_string (value));
+      if (!str)
+        continue;
+      g_hash_table_insert (dest, str, GUINT_TO_POINTER(1));
+    }
+}
+
+static void
+reread_favorite_apps (ShellAppSystem *system)
+{
+  GConfClient *client = gconf_client_get_default ();
+  GConfValue *val;
+
+  val = gconf_client_get (client, SHELL_APP_FAVORITES_KEY, NULL);
+
+  if (!(val && val->type == GCONF_VALUE_LIST && gconf_value_get_list_type (val) == GCONF_VALUE_STRING))
+    return;
+
+  g_hash_table_remove_all (system->priv->cached_favorites);
+  copy_gconf_value_string_list_to_hashset (val, system->priv->cached_favorites);
+
+  gconf_value_free (val);
+}
+
+void
+on_favorite_apps_changed (GConfClient *client,
+                          guint        id,
+                          GConfEntry  *entry,
+                          gpointer     user_data)
+{
+  ShellAppSystem *system = SHELL_APP_SYSTEM (user_data);
+  reread_favorite_apps (system);
+  g_signal_emit (G_OBJECT (system), signals[FAVORITES_CHANGED], 0);
+}
+
 GType
 shell_app_menu_entry_get_type (void)
 {
@@ -315,3 +397,160 @@ shell_app_system_get_default ()
 
   return instance;
 }
+
+/**
+ * shell_app_system_get_favorites:
+ *
+ * Return the list of applications which have been explicitly added to the
+ * favorites.
+ *
+ * Return value: (transfer container) (element-type utf8): List of favorite application ids
+ */
+GList *
+shell_app_system_get_favorites (ShellAppSystem *system)
+{
+  return g_hash_table_get_keys (system->priv->cached_favorites);
+}
+
+static void
+set_gconf_value_string_list (GConfValue *val, GList *items)
+{
+  GList *iter;
+  GSList *tmp = NULL;
+
+  for (iter = items; iter; iter = iter->next)
+    {
+      const char *str = iter->data;
+      GConfValue *strval = gconf_value_new (GCONF_VALUE_STRING);
+      gconf_value_set_string (strval, str);
+      tmp = g_slist_prepend (tmp, strval);
+    }
+  tmp = g_slist_reverse (tmp);
+
+  gconf_value_set_list (val, tmp);
+  g_slist_free (tmp);
+}
+
+void
+shell_app_system_add_favorite (ShellAppSystem *system, const char *id)
+{
+  GConfClient *client = gconf_client_get_default ();
+  GConfValue *val;
+  GList *favorites;
+
+  val = gconf_value_new (GCONF_VALUE_LIST);
+  gconf_value_set_list_type (val, GCONF_VALUE_STRING);
+
+  g_hash_table_insert (system->priv->cached_favorites, g_strdup (id), GUINT_TO_POINTER (1));
+
+  favorites = g_hash_table_get_keys (system->priv->cached_favorites);
+  set_gconf_value_string_list (val, favorites);
+  g_list_free (favorites);
+
+  gconf_client_set (client, SHELL_APP_FAVORITES_KEY, val, NULL);
+}
+
+void
+shell_app_system_remove_favorite (ShellAppSystem *system, const char *id)
+{
+  GConfClient *client = gconf_client_get_default ();
+  GConfValue *val;
+  GList *favorites;
+
+  if (!g_hash_table_remove (system->priv->cached_favorites, id))
+    return;
+
+  val = gconf_value_new (GCONF_VALUE_LIST);
+  gconf_value_set_list_type (val, GCONF_VALUE_STRING);
+
+  favorites = g_hash_table_get_keys (system->priv->cached_favorites);
+  set_gconf_value_string_list (val, favorites);
+  g_list_free (favorites);
+
+  gconf_client_set (client, SHELL_APP_FAVORITES_KEY, val, NULL);
+}
+
+static gboolean
+desktop_id_exists (ShellAppSystem      *system,
+                   const char          *target_id,
+                   GMenuTreeDirectory  *root)
+{
+  gboolean found = FALSE;
+  GSList *contents, *iter;
+
+  contents = gmenu_tree_directory_get_contents (root);
+
+  for (iter = contents; iter; iter = iter->next)
+    {
+      GMenuTreeItem *item = iter->data;
+
+      if (found)
+        break;
+
+      switch (gmenu_tree_item_get_type (item))
+        {
+          case GMENU_TREE_ITEM_ENTRY:
+            {
+              GMenuTreeEntry *entry = (GMenuTreeEntry *)item;
+              const char *id = gmenu_tree_entry_get_desktop_file_id (entry);
+              if (strcmp (id, target_id) == 0)
+                found = TRUE;
+            }
+            break;
+          case GMENU_TREE_ITEM_DIRECTORY:
+            {
+              GMenuTreeDirectory *dir = (GMenuTreeDirectory*)item;
+              found = desktop_id_exists (system, target_id, dir);
+            }
+            break;
+          default:
+            break;
+        }
+      gmenu_tree_item_unref (item);
+    }
+
+  g_slist_free (contents);
+
+  return found;
+}
+
+/**
+ * shell_app_system_lookup_basename:
+ * @name: Probable application identifier
+ *
+ * Determine whether a valid .desktop file ID corresponding to a given
+ * heuristically determined application identifier
+ * string.
+ */
+char *
+shell_app_system_lookup_basename (ShellAppSystem *system,
+                                  const char *name)
+{
+  GMenuTreeDirectory *root;
+  char *result;
+
+  root = gmenu_tree_get_directory_from_path (system->priv->apps_tree, "/");
+  g_assert (root != NULL);
+
+  if (desktop_id_exists (system, name, root))
+    {
+      result = g_strdup (name);
+      goto out;
+    }
+
+  /* These are common "vendor prefixes".  But using
+   * WM_CLASS as a source, we don't get the vendor
+   * prefix.  So try stripping them.
+   */
+  result = g_strjoin ("", "gnome-", name, NULL);
+  if (desktop_id_exists (system, result, root))
+    goto out;
+
+  result = g_strjoin ("", "fedora-", name, NULL);
+  if (desktop_id_exists (system, result, root))
+    goto out;
+
+out:
+  gmenu_tree_item_unref (root);
+  return result;
+}

src/shell-app-system.h

@@ -25,7 +25,8 @@ struct _ShellAppSystemClass
 {
   GObjectClass parent_class;
 
-  void (*changed)(ShellAppSystem *appsys, gpointer data);
+  void (*installed_changed)(ShellAppSystem *appsys, gpointer user_data);
+  void (*favorites_changed)(ShellAppSystem *appsys, gpointer user_data);
 };
 
 GType shell_app_system_get_type (void) G_GNUC_CONST;
@@ -43,8 +44,16 @@ struct _ShellAppMenuEntry {
 
 GType shell_app_menu_entry_get_type (void);
 
+char * shell_app_system_lookup_basename (ShellAppSystem *system, const char *id);
+
 GSList *shell_app_system_get_menus (ShellAppSystem *system);
 
 GSList *shell_app_system_get_all_settings (ShellAppSystem *system);
 
+GList *shell_app_system_get_favorites (ShellAppSystem *system);
+
+void shell_app_system_add_favorite (ShellAppSystem *system, const char *id);
+
+void shell_app_system_remove_favorite (ShellAppSystem *system, const char *id);
+
 #endif /* __SHELL_APP_SYSTEM_H__ */

src/shell-global.c

@@ -101,7 +101,7 @@ shell_global_get_property(GObject         *object,
       g_value_set_object (value, mutter_plugin_get_overlay_group (global->plugin));
       break;
     case PROP_SCREEN:
-      g_value_set_object (value, mutter_plugin_get_screen (global->plugin));
+      g_value_set_object (value, shell_global_get_screen (global));
       break;
     case PROP_SCREEN_WIDTH:
       {
@@ -608,6 +608,17 @@ shell_global_set_stage_input_region (ShellGlobal *global,
   shell_global_set_stage_input_mode (global, global->input_mode);
 }
 
+/**
+ * shell_global_get_screen:
+ *
+ * Return value: (transfer none): The default #MetaScreen
+ */
+MetaScreen *
+shell_global_get_screen (ShellGlobal  *global)
+{
+  return mutter_plugin_get_screen (global->plugin);
+}
+
 /**
  * shell_global_get_windows:
  *
@@ -933,6 +944,55 @@ shell_global_create_vertical_gradient (ClutterColor *top,
   return texture;
 }
 
+/**
+ * shell_global_create_horizontal_gradient:
+ * @left: the color on the left
+ * @right: the color on the right
+ *
+ * Creates a horizontal gradient actor.
+ *
+ * Return value: (transfer none): a #ClutterCairoTexture actor with the
+ *               gradient. The texture actor is floating, hence (transfer none).
+ */
+ClutterCairoTexture *
+shell_global_create_horizontal_gradient (ClutterColor *left,
+                                         ClutterColor *right)
+{
+  ClutterCairoTexture *texture;
+  cairo_t *cr;
+  cairo_pattern_t *pattern;
+
+  /* Draw the gradient on an 8x1 pixel texture. Because the gradient is drawn
+   * from the left to the right column, after stretching 1/16 of the
+   * texture width has the left side color and 1/16 has the right side color. 
+   * There is no reason to use the 8 pixel height that would be similar to the
+   * reason we are using the 8 pixel width for the vertical gradient, so we
+   * are just using the 1 pixel height instead.
+   */
+  texture = CLUTTER_CAIRO_TEXTURE (clutter_cairo_texture_new (8, 1));
+  cr = clutter_cairo_texture_create (texture);
+
+  pattern = cairo_pattern_create_linear (0, 0, 8, 0);
+  cairo_pattern_add_color_stop_rgba (pattern, 0,
+                                     left->red / 255.,
+                                     left->green / 255.,
+                                     left->blue / 255.,
+                                     left->alpha / 255.);
+  cairo_pattern_add_color_stop_rgba (pattern, 1,
+                                     right->red / 255.,
+                                     right->green / 255.,
+                                     right->blue / 255.,
+                                     right->alpha / 255.);
+
+  cairo_set_source (cr, pattern);
+  cairo_paint (cr);
+
+  cairo_pattern_destroy (pattern);
+  cairo_destroy (cr);
+
+  return texture;
+}
+
 /*
  * Updates the global->root_pixmap actor with the root window's pixmap or fails
  * with a warning.

src/shell-global.h

@@ -48,6 +48,8 @@ ClutterActor *shell_get_event_related(ClutterEvent *event);
 
 ShellGlobal *shell_global_get (void);
 
+MetaScreen *shell_global_get_screen (ShellGlobal  *global);
+
 void shell_global_grab_dbus_service (ShellGlobal *global);
 
 void shell_global_start_task_panel (ShellGlobal *global);
@@ -76,6 +78,9 @@ void shell_global_reexec_self (ShellGlobal *global);
 ClutterCairoTexture *shell_global_create_vertical_gradient (ClutterColor *top,
 							    ClutterColor *bottom);
 
+ClutterCairoTexture *shell_global_create_horizontal_gradient (ClutterColor *left,
+							      ClutterColor *right);
+
 ClutterActor *shell_global_create_root_pixmap_actor (ShellGlobal *global);
 
 void shell_global_clutter_cairo_texture_draw_clock (ClutterCairoTexture *texture,