Allow falling back to another icon theme before hicolor. (#325546, Rodney

2006-01-11  Matthias Clasen  <mclasen@redhat.com>

	Allow falling back to another icon theme before
	hicolor.   (#325546, Rodney Dawes)

	* gtk/gtksettings.c: Add a gtk-fallback-icon-theme setting.

	* gdk/x11/gdkevents-x11.c: Map it to the XSetting Net/FallbackIconTheme.

	* gtk/gtkicontheme.c: Consult the fallback icon theme before
	looking in hicolor.

2 files changed, 40 insertions, 4 deletions

diff --git a/gtk/gtkicontheme.c b/gtk/gtkicontheme.c
index 885df5381a..869cc2c701 100644
--- a/gtk/gtkicontheme.c
+++ b/gtk/gtkicontheme.c
@@ -72,6 +72,7 @@ struct _GtkIconThemePrivate
   guint pixbuf_supports_svg : 1;
   
   char *current_theme;
+  char *fallback_theme;
   char **search_path;
   int search_path_len;
 
@@ -412,11 +413,15 @@ update_current_theme (GtkIconTheme *icon_theme)
   if (!priv->custom_theme)
     {
       gchar *theme = NULL;
+      gchar *fallback_theme = NULL;
+      gboolean changed = FALSE;
 
       if (priv->screen)
 	{
 	  GtkSettings *settings = gtk_settings_get_for_screen (priv->screen);
-	  g_object_get (settings, "gtk-icon-theme-name", &theme, NULL);
+	  g_object_get (settings, 
+			"gtk-icon-theme-name", &theme, 
+			"gtk-fallback-icon-theme", &fallback_theme, NULL);
 	}
 
       if (!theme)
@@ -427,10 +432,26 @@ update_current_theme (GtkIconTheme *icon_theme)
 	  g_free (priv->current_theme);
 	  priv->current_theme = theme;
 
-	  do_theme_change (icon_theme);
+	  changed = TRUE;
 	}
       else
 	g_free (theme);
+
+      if ((priv->fallback_theme && !fallback_theme) ||
+	  (!priv->fallback_theme && fallback_theme) ||
+	  (priv->fallback_theme && fallback_theme &&
+	   strcmp (priv->fallback_theme, fallback_theme) != 0))
+	{
+	  g_free (priv->fallback_theme);
+	  priv->fallback_theme = fallback_theme;
+
+	  changed = TRUE;
+	}
+      else
+	g_free (fallback_theme);
+
+      if (changed)
+	do_theme_change (icon_theme);
     }
 }
 
@@ -504,6 +525,8 @@ gtk_icon_theme_set_screen (GtkIconTheme *icon_theme,
 			G_CALLBACK (display_closed), icon_theme);
       g_signal_connect (settings, "notify::gtk-icon-theme-name",
 			G_CALLBACK (theme_changed), icon_theme);
+      g_signal_connect (settings, "notify::gtk-fallback-icon-theme-name",
+			G_CALLBACK (theme_changed), icon_theme);
     }
 
   update_current_theme (icon_theme);
@@ -1019,8 +1042,10 @@ load_themes (GtkIconTheme *icon_theme)
   priv->all_icons = g_hash_table_new (g_str_hash, g_str_equal);
   
   insert_theme (icon_theme, priv->current_theme);
-  
-  /* Always look in the "default" icon theme */
+
+  /* Always look in the "default" icon theme, and in a fallback theme */
+  if (priv->fallback_theme)
+    insert_theme (icon_theme, priv->fallback_theme);
   insert_theme (icon_theme, DEFAULT_THEME_NAME);
   priv->themes = g_list_reverse (priv->themes);
 
diff --git a/gtk/gtksettings.c b/gtk/gtksettings.c
index a0a10ef75a..9f0c837f7d 100644
--- a/gtk/gtksettings.c
+++ b/gtk/gtksettings.c
@@ -66,6 +66,7 @@ enum {
   PROP_SPLIT_CURSOR,
   PROP_THEME_NAME,
   PROP_ICON_THEME_NAME,
+  PROP_FALLBACK_ICON_THEME,
   PROP_KEY_THEME_NAME,
   PROP_MENU_BAR_ACCEL,
   PROP_DND_DRAG_THRESHOLD,
@@ -259,6 +260,7 @@ gtk_settings_class_init (GtkSettingsClass *class)
 								  GTK_PARAM_READWRITE),
                                              NULL);
   g_assert (result == PROP_THEME_NAME);
+
   result = settings_install_property_parser (class,
                                              g_param_spec_string ("gtk-icon-theme-name",
 								  P_("Icon Theme Name"),
@@ -267,6 +269,15 @@ gtk_settings_class_init (GtkSettingsClass *class)
 								  GTK_PARAM_READWRITE),
                                              NULL);
   g_assert (result == PROP_ICON_THEME_NAME);
+
+  result = settings_install_property_parser (class,
+                                             g_param_spec_string ("gtk-fallback-icon-theme",
+								  P_("Fallback Icon Theme Name"),
+								  P_("Name of a icon theme to fall back to"),
+								  NULL,
+								  GTK_PARAM_READWRITE),
+                                             NULL);
+  g_assert (result == PROP_FALLBACK_ICON_THEME);
   
   result = settings_install_property_parser (class,
                                              g_param_spec_string ("gtk-key-theme-name",