[gtk/readonly-events-1: 10/18] eventcontroller: Make the target widget available

[Matthias Clasen <matthiasc src gnome org>]

commit 2ccda389429060d1d4e997216665ec0b6b8bec22
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Feb 16 02:46:05 2020 -0500

    eventcontroller: Make the target widget available
    
    Make it possible for event controllers to obtain
    the target widget during handle_event.

 gtk/gtkeventcontroller.c        | 16 ++++++++++++++++
 gtk/gtkeventcontrollerprivate.h |  2 ++
 2 files changed, 18 insertions(+)
---
diff --git a/gtk/gtkeventcontroller.c b/gtk/gtkeventcontroller.c
index 34594efa46..c58d986211 100644
--- a/gtk/gtkeventcontroller.c
+++ b/gtk/gtkeventcontroller.c
@@ -58,6 +58,7 @@ struct _GtkEventControllerPrivate
   GtkPropagationPhase phase;
   GtkPropagationLimit limit;
   char *name;
+  GtkWidget *target;
 };
 
 G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GtkEventController, gtk_event_controller, G_TYPE_OBJECT)
@@ -323,8 +324,11 @@ gtk_event_controller_handle_event (GtkEventController *controller,
                                    double              y)
 {
   GtkEventControllerClass *controller_class;
+  GtkEventControllerPrivate *priv;
   gboolean retval = FALSE;
 
+  priv = gtk_event_controller_get_instance_private (controller);
+
   g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER (controller), FALSE);
   g_return_val_if_fail (event != NULL, FALSE);
 
@@ -333,10 +337,14 @@ gtk_event_controller_handle_event (GtkEventController *controller,
 
   controller_class = GTK_EVENT_CONTROLLER_GET_CLASS (controller);
 
+  priv->target = target;
+
   g_object_ref (controller);
   retval = controller_class->handle_event (controller, event, x, y);
   g_object_unref (controller);
 
+  priv->target = NULL;
+
   return retval;
 }
 
@@ -516,6 +524,14 @@ gtk_event_controller_set_name (GtkEventController *controller,
   priv->name = g_strdup (name);
 }
 
+GtkWidget *
+gtk_event_controller_get_target (GtkEventController *controller)
+{
+  GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (controller);
+
+  return priv->target;
+}
+
 static GtkCrossingData *
 gtk_crossing_data_copy (GtkCrossingData *crossing)
 {
diff --git a/gtk/gtkeventcontrollerprivate.h b/gtk/gtkeventcontrollerprivate.h
index 79a61d0314..5c2d341611 100644
--- a/gtk/gtkeventcontrollerprivate.h
+++ b/gtk/gtkeventcontrollerprivate.h
@@ -56,4 +56,6 @@ struct _GtkEventControllerClass
   gpointer padding[10];
 };
 
+GtkWidget *gtk_event_controller_get_target (GtkEventController *controller);
+
 #endif /* __GTK_EVENT_CONTROLLER_PRIVATE_H__ */