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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/gtk/focus_store_gtk.h"
#include <gtk/gtk.h>
namespace ui {
FocusStoreGtk::FocusStoreGtk()
: widget_(NULL),
destroy_handler_id_(0) {
}
FocusStoreGtk::~FocusStoreGtk() {
DisconnectDestroyHandler();
}
void FocusStoreGtk::Store(GtkWidget* widget) {
GtkWidget* focus_widget = NULL;
if (widget) {
// A detached widget won't have a toplevel window as an ancestor, so we
// can't assume that the query for toplevel will return a window.
GtkWidget* toplevel = gtk_widget_get_ancestor(widget, GTK_TYPE_WINDOW);
GtkWindow* window = GTK_IS_WINDOW(toplevel) ? GTK_WINDOW(toplevel) : NULL;
if (window)
focus_widget = window->focus_widget;
}
SetWidget(focus_widget);
}
void FocusStoreGtk::SetWidget(GtkWidget* widget) {
DisconnectDestroyHandler();
// We don't add a ref. The signal handler below effectively gives us a weak
// reference.
widget_ = widget;
if (widget_) {
// When invoked, |gtk_widget_destroyed| will set |widget_| to NULL.
destroy_handler_id_ = g_signal_connect(widget_, "destroy",
G_CALLBACK(gtk_widget_destroyed),
&widget_);
}
}
void FocusStoreGtk::DisconnectDestroyHandler() {
if (widget_) {
g_signal_handler_disconnect(widget_, destroy_handler_id_);
widget_ = NULL;
}
}
} // namespace ui
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