[gnome-builder/wip/gtk4-port] libide/gui: add dark helper

[Christian Hergert <chergert src gnome org>]

commit b965b0483b0ebf66ab9cefae1544c3164b0c1544
Author: Christian Hergert <chergert redhat com>
Date:   Mon Apr 4 15:59:45 2022 -0700

    libide/gui: add dark helper

 src/libide/gui/ide-application-color.c | 8 ++++++++
 src/libide/gui/ide-application.h       | 2 ++
 2 files changed, 10 insertions(+)
---
diff --git a/src/libide/gui/ide-application-color.c b/src/libide/gui/ide-application-color.c
index 6cbe322ba..de2e8a487 100644
--- a/src/libide/gui/ide-application-color.c
+++ b/src/libide/gui/ide-application-color.c
@@ -223,3 +223,11 @@ _ide_application_init_color (IdeApplication *self)
   _ide_application_update_style_scheme (self);
   ide_application_color_style_scheme_changed_cb (self, "style-scheme-name", self->editor_settings);
 }
+
+gboolean
+ide_application_get_dark (IdeApplication *self)
+{
+  g_return_val_if_fail (IDE_IS_APPLICATION (self), FALSE);
+
+  return adw_style_manager_get_dark (adw_style_manager_get_default ());
+}
diff --git a/src/libide/gui/ide-application.h b/src/libide/gui/ide-application.h
index 1f8c1126d..dd679ffff 100644
--- a/src/libide/gui/ide-application.h
+++ b/src/libide/gui/ide-application.h
@@ -96,5 +96,7 @@ const char    *ide_application_get_style_scheme          (IdeApplication
 IDE_AVAILABLE_IN_ALL
 void           ide_application_set_style_scheme          (IdeApplication           *self,
                                                           const char               *style_scheme);
+IDE_AVAILABLE_IN_ALL
+gboolean       ide_application_get_dark                  (IdeApplication           *self);
 
 G_END_DECLS