[gnome-builder/wip/gtk4-port] libide/gui: try to locate non-workspace contexts

[Christian Hergert <chergert src gnome org>]

commit 87118d0d1720a5e15a53d5977873147281610c8d
Author: Christian Hergert <chergert redhat com>
Date:   Mon May 2 20:43:24 2022 -0700

    libide/gui: try to locate non-workspace contexts
    
    In case we have a window that has a context property but is not an
    IdeWorkspace (such as IdePreferencesWindow).

 src/libide/gui/ide-gui-global.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
---
diff --git a/src/libide/gui/ide-gui-global.c b/src/libide/gui/ide-gui-global.c
index 006955ef3..d4314bbb5 100644
--- a/src/libide/gui/ide-gui-global.c
+++ b/src/libide/gui/ide-gui-global.c
@@ -144,6 +144,8 @@ ide_widget_set_context_handler (gpointer                widget,
     ide_widget_notify_root_cb (widget, NULL, NULL);
 }
 
+static gboolean dummy_cb (gpointer) { return G_SOURCE_REMOVE; }
+
 /**
  * ide_widget_get_context:
  * @widget: a #GtkWidget
@@ -164,6 +166,27 @@ ide_widget_get_context (GtkWidget *widget)
   if (IDE_IS_WORKSPACE (toplevel))
     return ide_workspace_get_context (IDE_WORKSPACE (toplevel));
 
+  if (toplevel != NULL)
+    {
+      GObjectClass *object_class = G_OBJECT_GET_CLASS (toplevel);
+      GParamSpec *pspec = g_object_class_find_property (object_class, "context");
+
+      if (G_IS_PARAM_SPEC_OBJECT (pspec) &&
+          g_type_is_a (pspec->value_type, IDE_TYPE_CONTEXT))
+        {
+          g_auto(GValue) value = G_VALUE_INIT;
+          IdeContext *ret;
+
+          g_value_init (&value, IDE_TYPE_CONTEXT);
+          g_object_get_property (G_OBJECT (toplevel), "context", &value);
+
+          ret = g_value_dup_object (&value);
+          g_idle_add_full (G_PRIORITY_LOW, dummy_cb, ret, g_object_unref);
+
+          return ret;
+        }
+    }
+
   return NULL;
 }