[gnome-builder] app: load styles from .local/share/gtksourceview-3.0

[Christian Hergert <chergert src gnome org>]

commit bf7906fe916f5053c08e39eb7c7138975a1891bf
Author: Christian Hergert <chergert redhat com>
Date:   Thu Oct 19 03:02:59 2017 -0700

    app: load styles from .local/share/gtksourceview-3.0
    
    This might be necessary when we are in flatpak, but we want to
    try to locate styles installed in the users home directory
    (instead of our private data dir).

 src/libide/application/ide-application.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/src/libide/application/ide-application.c b/src/libide/application/ide-application.c
index 42ceb6c..07f3fb3 100644
--- a/src/libide/application/ide-application.c
+++ b/src/libide/application/ide-application.c
@@ -133,12 +133,22 @@ ide_application_register_search_paths (IdeApplication *self)
   GtkSourceLanguageManager *languages;
   g_autofree gchar *gedit_path = NULL;
   g_autofree gchar *lang_path = NULL;
+  g_autofree gchar *style_path = NULL;
   const gchar * const *path;
 
   g_assert (IDE_IS_APPLICATION (self));
 
   manager = gtk_source_style_scheme_manager_get_default ();
 
+  /* We might need to set this up in case we're in flatpak */
+  style_path = g_build_filename (g_get_home_dir (),
+                                 ".local",
+                                 "share",
+                                 "gtksourceview-3.0",
+                                 "styles",
+                                 NULL);
+  gtk_source_style_scheme_manager_append_search_path (manager, style_path);
+
   gtk_source_style_scheme_manager_append_search_path (manager,
                                                       PACKAGE_DATADIR"/gtksourceview-3.0/styles/");