Display thumbnails of recent files in the overlay mode by using GnomeThumbnailFactory to get them. Fall back to the system icon for the file type provided by GtkRecentInfo when a thumbnail is not available.

svn path=/trunk/; revision=143

src/Makefile.am

@@ -10,6 +10,7 @@ include Makefile-tray.am
 
 gnome_shell_cflags =				\
 	$(MUTTER_PLUGIN_CFLAGS)			\
+        $(LIBGNOMEUI_CFLAGS)                    \
 	-Itray					\
 	-DGETTEXT_PACKAGE=gnome-shell		\
 	-DGNOME_SHELL_DATADIR=\"$(pkgdatadir)\"	\
@@ -65,6 +66,7 @@ shell-marshal.c: Makefile shell-marshal.list
 libgnome_shell_la_LDFLAGS = -avoid-version -module
 libgnome_shell_la_LIBADD =	\
 	$(MUTTER_PLUGIN_LIBS)	\
+        $(LIBGNOMEUI_LIBS)      \
 	libbig-1.0.la		\
 	libtidy-1.0.la		\
 	libtray.la

src/shell-global.c

@@ -8,6 +8,8 @@
 #include <unistd.h>
 #include <errno.h>
 #include <string.h>
+#include <math.h>
+#include <libgnomeui-2.0/libgnomeui/gnome-thumbnail.h>
 
 struct _ShellGlobal {
   GObject parent;
@@ -240,6 +242,57 @@ shell_clutter_texture_set_from_pixbuf (ClutterTexture *texture,
                                               0, NULL);
 }
 
+static GnomeThumbnailFactory *thumbnail_factory;
+
+/**
+ * shell_get_thumbnail_for_recent_info:
+ *
+ * @recent_info: #GtkRecentInfo for which to return a thumbnail
+ *
+ * Return value: #GdkPixbuf containing a thumbnail for the file described by #GtkRecentInfo 
+ *               if the thumbnail exists or can be generated, %NULL otherwise
+ */
+GdkPixbuf *
+shell_get_thumbnail_for_recent_info(GtkRecentInfo  *recent_info)
+{
+    char *existing_thumbnail;
+    GdkPixbuf *pixbuf = NULL;
+    const gchar *uri = gtk_recent_info_get_uri (recent_info);
+    time_t mtime = gtk_recent_info_get_modified (recent_info);
+    const gchar *mime_type = gtk_recent_info_get_mime_type (recent_info);
+    GError *error = NULL;
+    
+    if (thumbnail_factory == NULL)
+       thumbnail_factory = gnome_thumbnail_factory_new (GNOME_THUMBNAIL_SIZE_NORMAL);
+
+    existing_thumbnail = gnome_thumbnail_factory_lookup (thumbnail_factory, uri, mtime);
+
+    if (existing_thumbnail != NULL)
+      {
+        pixbuf = gdk_pixbuf_new_from_file(existing_thumbnail, &error);
+        if (error != NULL) 
+          {
+            g_warning("Could not generate a pixbuf from file %s: %s", existing_thumbnail, error->message);
+            g_clear_error (&error);
+          }
+      }
+    else if (gnome_thumbnail_factory_can_thumbnail (thumbnail_factory, uri, mime_type, mtime)) 
+      {
+        pixbuf = gnome_thumbnail_factory_generate_thumbnail (thumbnail_factory, uri, mime_type);
+        if (pixbuf == NULL) 
+          {
+            g_warning ("Could not generate thumbnail for %s", uri);
+          }          
+        else 
+          {
+            // we need to save the thumbnail so that we don't need to generate it again in the future
+            gnome_thumbnail_factory_save_thumbnail (thumbnail_factory, pixbuf, uri, mtime);
+          }
+      }
+
+    return pixbuf;   
+}
+
 /**
  * shell_global_get:
  *
@@ -402,4 +455,4 @@ shell_global_reexec_self (ShellGlobal *global)
   execvp (arr->pdata[0], (char**)arr->pdata);
   g_warning ("failed to reexec: %s", g_strerror (errno));
   g_ptr_array_free (arr, TRUE);
-}
+}

src/shell-global.h

@@ -5,6 +5,7 @@
 #include <clutter/clutter.h>
 #include <glib-object.h>
 #include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gtk/gtk.h>
 
 G_BEGIN_DECLS
 
@@ -30,9 +31,10 @@ struct _ShellGlobalClass
 
 GType            shell_global_get_type            (void) G_GNUC_CONST;
 
-gboolean
-shell_clutter_texture_set_from_pixbuf (ClutterTexture *texture,
-                                       GdkPixbuf      *pixbuf);
+gboolean shell_clutter_texture_set_from_pixbuf (ClutterTexture *texture,
+                                                GdkPixbuf      *pixbuf);
+
+GdkPixbuf *shell_get_thumbnail_for_recent_info(GtkRecentInfo  *recent_info);
 
 ShellGlobal *shell_global_get (void);