appearance in wayland: Support changing theme, icon theme, and fonts

*If we are in a wayland session, write the gtk theme and icon theme to both org.mate and org.gnome
*This changes wayland and xwayland themes simultaniously

*Under wayland, set the application and document fonts for both MATE and GNOME
*Otherwise some applications will ignore font changes set from the appearance capplet

*Only load GNOME interface  gsettings when running under wayland

*fail gracefully if the gnome interface schema is not present
    *Do not depend on it but use it if it is present to allow setting themes in compositors such as wayfire that use the GNOME gsettings values

1 files changed, 16 insertions, 0 deletions

diff --git a/capplets/appearance/appearance-main.c b/capplets/appearance/appearance-main.c
index 2a9b92eb..8e19c02b 100644
--- a/capplets/appearance/appearance-main.c
+++ b/capplets/appearance/appearance-main.c
@@ -31,6 +31,7 @@
 #include "theme-thumbnail.h"
 #include "activate-settings-daemon.h"
 #include "capplet-util.h"
+#include <gdk/gdkx.h>
 
 static AppearanceData *
 init_appearance_data (int *argc, char ***argv, GOptionContext *context)
@@ -56,6 +57,21 @@ init_appearance_data (int *argc, char ***argv, GOptionContext *context)
 
   data->filechooser_settings = g_settings_new (FILECHOOSER_SCHEMA);
   data->interface_settings = g_settings_new (INTERFACE_SCHEMA);
+
+  data->interface_gnome_settings = NULL;
+  /*Load the gnome interface schema if we are running under wayland and it is present*/
+  if (!(GDK_IS_X11_DISPLAY (gdk_display_get_default())))
+  {
+    GSettingsSchemaSource *source = g_settings_schema_source_get_default ();
+
+    if (source)
+    {
+      GSettingsSchema *schema = g_settings_schema_source_lookup (source, INTERFACE_GNOME_SCHEMA, TRUE);
+
+      if (schema)
+        data->interface_gnome_settings = g_settings_new_full (schema, NULL, NULL);
+    }
+  }
   data->marco_settings = g_settings_new (MARCO_SCHEMA);
   data->mouse_settings = g_settings_new (MOUSE_SCHEMA);
   data->font_settings = g_settings_new (FONT_RENDER_SCHEMA);