[gnome-builder] libide/core: add ide_context_register_settings()

[Christian Hergert <chergert src gnome org>]

commit 2f606c837e6caf92a916bc1dadcae063b0175251
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jul 26 18:03:52 2022 -0700

    libide/core: add ide_context_register_settings()
    
    The goal here is to make it easy to register settings that can be changed
    for both the application and the project. Readback of project settings
    always falls through to the lower layers but writes to the project
    overrides. For the application it will write and write to the app-wide
    gsettings.

 src/libide/core/ide-context.c | 53 +++++++++++++++++++++++++++++++------------
 src/libide/core/ide-context.h |  3 +++
 2 files changed, 42 insertions(+), 14 deletions(-)
---
diff --git a/src/libide/core/ide-context.c b/src/libide/core/ide-context.c
index 0d903fc16..e443804ff 100644
--- a/src/libide/core/ide-context.c
+++ b/src/libide/core/ide-context.c
@@ -31,6 +31,7 @@
 #include "ide-gsettings-action-group.h"
 #include "ide-macros.h"
 #include "ide-notifications.h"
+#include "ide-settings.h"
 
 /**
  * SECTION:ide-context
@@ -382,6 +383,8 @@ void
 ide_context_set_project_id (IdeContext *self,
                             const char *project_id)
 {
+  gboolean register_settings = FALSE;
+
   g_return_if_fail (IDE_IS_MAIN_THREAD ());
   g_return_if_fail (IDE_IS_CONTEXT (self));
 
@@ -391,25 +394,15 @@ ide_context_set_project_id (IdeContext *self,
   ide_object_lock (IDE_OBJECT (self));
   if (!ide_str_equal0 (self->project_id, project_id))
     {
-      g_autoptr(IdeGSettingsActionGroup) project_settings_action_group = NULL;
-      g_autoptr(GSettings) project_settings = NULL;
-      g_autofree char *path = NULL;
-
       g_free (self->project_id);
       self->project_id = g_strdup (project_id);
-
-      path = g_strdup_printf ("/org/gnome/builder/projects/%s/", project_id);
-      project_settings = g_settings_new_with_path ("org.gnome.builder.project", path);
-      project_settings_action_group = g_object_new (IDE_TYPE_GSETTINGS_ACTION_GROUP,
-                                                    "settings", project_settings,
-                                                    NULL);
-      ide_action_muxer_insert_action_group (self->action_muxer,
-                                            "settings:org.gnome.builder.project",
-                                            G_ACTION_GROUP (project_settings_action_group));
-
       ide_object_notify_by_pspec (IDE_OBJECT (self), properties [PROP_PROJECT_ID]);
+      register_settings = TRUE;
     }
   ide_object_unlock (IDE_OBJECT (self));
+
+  if (register_settings)
+    ide_context_register_settings (self, "org.gnome.builder.project");
 }
 
 /**
@@ -777,3 +770,35 @@ ide_context_ref_action_muxer (IdeContext *self)
 
   return g_steal_pointer (&ret);
 }
+
+/**
+ * ide_context_register_settings:
+ * @self: a #IdeContext
+ *
+ * Registers settings that can be overriden by a project.
+ *
+ * Use this if you have a GSettings schema that can have both
+ * application and per-project overrides.
+ */
+void
+ide_context_register_settings (IdeContext *self,
+                               const char *schema_id)
+{
+  g_autoptr(IdeActionMuxer) muxer = NULL;
+  g_autofree char *project_id = NULL;
+
+  g_return_if_fail (IDE_IS_CONTEXT (self));
+  g_return_if_fail (schema_id != NULL);
+
+  if ((muxer = ide_context_ref_action_muxer (self)) &&
+      (project_id = ide_context_dup_project_id (self)))
+    {
+      g_autoptr(IdeSettings) project_settings = ide_settings_new (project_id, schema_id, NULL, FALSE);
+      g_autoptr(IdeSettings) app_settings = ide_settings_new (project_id, schema_id, NULL, TRUE);
+      g_autofree char *project_group = g_strconcat ("project.settings:", schema_id, NULL);
+      g_autofree char *app_group = g_strconcat ("app.settings:", schema_id, NULL);
+
+      ide_action_muxer_insert_action_group (muxer, app_group, G_ACTION_GROUP (app_settings));
+      ide_action_muxer_insert_action_group (muxer, project_group, G_ACTION_GROUP (project_settings));
+    }
+}
diff --git a/src/libide/core/ide-context.h b/src/libide/core/ide-context.h
index f6ce820f8..a167f4246 100644
--- a/src/libide/core/ide-context.h
+++ b/src/libide/core/ide-context.h
@@ -87,6 +87,9 @@ void            ide_context_log                  (IdeContext     *self,
                                                   const gchar    *message);
 IDE_AVAILABLE_IN_ALL
 IdeActionMuxer *ide_context_ref_action_muxer     (IdeContext     *self);
+IDE_AVAILABLE_IN_ALL
+void            ide_context_register_settings    (IdeContext     *self,
+                                                  const char     *schema_id);
 
 #ifdef __cplusplus
 #define ide_context_warning(instance, format, ...) \