[gnome-control-center] background: Only show the image types we support

[Bastien Nocera <hadess src gnome org>]

commit 3d79e1174e7287f29ad630a4aea55cfa0a6d2b2a
Author: Bastien Nocera <hadess hadess net>
Date:   Thu May 17 18:12:13 2012 +0100

    background: Only show the image types we support
    
    And add image/bmp to those types.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=669960

 panels/background/bg-pictures-source.c  |   69 +++++++++++++++++++------------
 panels/background/bg-pictures-source.h  |    2 +
 panels/background/cc-background-panel.c |    6 ++-
 3 files changed, 50 insertions(+), 27 deletions(-)
---
diff --git a/panels/background/bg-pictures-source.c b/panels/background/bg-pictures-source.c
index e1e1483..2c04695 100644
--- a/panels/background/bg-pictures-source.c
+++ b/panels/background/bg-pictures-source.c
@@ -46,6 +46,14 @@ struct _BgPicturesSourcePrivate
   GHashTable *known_items;
 };
 
+const char * const content_types[] = {
+	"image/png",
+	"image/jpeg",
+	"image/bmp",
+	"image/svg+xml",
+	NULL
+};
+
 static char *bg_pictures_source_get_unique_filename (const char *uri);
 
 static void
@@ -281,45 +289,49 @@ picture_opened_for_read (GObject *source_object,
 }
 
 static gboolean
+in_content_types (const char *content_type)
+{
+	guint i;
+	for (i = 0; content_types[i]; i++)
+		if (g_str_equal (content_types[i], content_type))
+			return TRUE;
+	return FALSE;
+}
+
+static gboolean
 add_single_file (BgPicturesSource *bg_source,
 		 GFile            *file,
 		 GFileInfo        *info,
 		 const char       *source_uri)
 {
   const gchar *content_type;
+  CcBackgroundItem *item;
+  char *uri;
 
   /* find png and jpeg files */
   content_type = g_file_info_get_content_type (info);
 
   if (!content_type)
     return FALSE;
+  if (!in_content_types (content_type))
+    return FALSE;
 
-  if (g_str_equal ("image/png", content_type) ||
-      g_str_equal ("image/jpeg", content_type) ||
-      g_str_equal ("image/svg+xml", content_type))
-    {
-      CcBackgroundItem *item;
-      char *uri;
-
-      /* create a new CcBackgroundItem */
-      uri = g_file_get_uri (file);
-      item = cc_background_item_new (uri);
-      g_free (uri);
-      g_object_set (G_OBJECT (item),
-		    "flags", CC_BACKGROUND_ITEM_HAS_URI | CC_BACKGROUND_ITEM_HAS_SHADING,
-		    "shading", G_DESKTOP_BACKGROUND_SHADING_SOLID,
-		    "placement", G_DESKTOP_BACKGROUND_STYLE_ZOOM,
-		    NULL);
-      if (source_uri != NULL)
-        g_object_set (G_OBJECT (item), "source-url", source_uri, NULL);
-
-      g_object_set_data (G_OBJECT (file), "item", item);
-      g_file_read_async (file, 0, NULL, picture_opened_for_read, bg_source);
-      g_object_unref (file);
-      return TRUE;
-    }
-
-  return FALSE;
+  /* create a new CcBackgroundItem */
+  uri = g_file_get_uri (file);
+  item = cc_background_item_new (uri);
+  g_free (uri);
+  g_object_set (G_OBJECT (item),
+		"flags", CC_BACKGROUND_ITEM_HAS_URI | CC_BACKGROUND_ITEM_HAS_SHADING,
+		"shading", G_DESKTOP_BACKGROUND_SHADING_SOLID,
+		"placement", G_DESKTOP_BACKGROUND_STYLE_ZOOM,
+		NULL);
+  if (source_uri != NULL)
+    g_object_set (G_OBJECT (item), "source-url", source_uri, NULL);
+
+  g_object_set_data (G_OBJECT (file), "item", item);
+  g_file_read_async (file, 0, NULL, picture_opened_for_read, bg_source);
+  g_object_unref (file);
+  return TRUE;
 }
 
 gboolean
@@ -554,3 +566,8 @@ bg_pictures_source_new (void)
   return g_object_new (BG_TYPE_PICTURES_SOURCE, NULL);
 }
 
+const char * const *
+bg_pictures_get_support_content_types (void)
+{
+	return content_types;
+}
diff --git a/panels/background/bg-pictures-source.h b/panels/background/bg-pictures-source.h
index 9260cd1..554a5c6 100644
--- a/panels/background/bg-pictures-source.h
+++ b/panels/background/bg-pictures-source.h
@@ -80,6 +80,8 @@ gboolean          bg_pictures_source_remove         (BgPicturesSource *bg_source
 gboolean          bg_pictures_source_is_known       (BgPicturesSource *bg_source,
 						     const char       *uri);
 
+const char * const * bg_pictures_get_support_content_types (void);
+
 G_END_DECLS
 
 #endif /* _BG_PICTURES_SOURCE_H */
diff --git a/panels/background/cc-background-panel.c b/panels/background/cc-background-panel.c
index 1ec9188..15b7221 100644
--- a/panels/background/cc-background-panel.c
+++ b/panels/background/cc-background-panel.c
@@ -992,11 +992,15 @@ add_button_clicked (GtkButton         *button,
   GtkWidget *preview;
   GtkFileFilter *filter;
   CcBackgroundPanelPrivate *priv;
+  const char * const * content_types;
+  guint i;
 
   priv = panel->priv;
 
   filter = gtk_file_filter_new ();
-  gtk_file_filter_add_mime_type (filter, "image/*");
+  content_types = bg_pictures_get_support_content_types ();
+  for (i = 0; content_types[i] != NULL; i++)
+    gtk_file_filter_add_mime_type (filter, content_types[i]);
 
   chooser = gtk_file_chooser_dialog_new (_("Browse for more pictures"),
 					 GTK_WINDOW (gtk_widget_get_toplevel (WID ("background-panel"))),