1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "chrome/browser/ui/gtk/focus_store_gtk.h" 6 7 #include <gtk/gtk.h> 8 9 #include "chrome/browser/platform_util.h" 10 FocusStoreGtk()11 FocusStoreGtk::FocusStoreGtk() 12 : widget_(NULL), 13 destroy_handler_id_(0) { 14 } 15 ~FocusStoreGtk()16 FocusStoreGtk::~FocusStoreGtk() { 17 DisconnectDestroyHandler(); 18 } 19 Store(GtkWidget * widget)20 void FocusStoreGtk::Store(GtkWidget* widget) { 21 GtkWidget* focus_widget = NULL; 22 if (widget) { 23 GtkWindow* window = platform_util::GetTopLevel(widget); 24 if (window) 25 focus_widget = window->focus_widget; 26 } 27 28 SetWidget(focus_widget); 29 } 30 SetWidget(GtkWidget * widget)31 void FocusStoreGtk::SetWidget(GtkWidget* widget) { 32 DisconnectDestroyHandler(); 33 34 // We don't add a ref. The signal handler below effectively gives us a weak 35 // reference. 36 widget_ = widget; 37 if (widget_) { 38 // When invoked, |gtk_widget_destroyed| will set |widget_| to NULL. 39 destroy_handler_id_ = g_signal_connect(widget_, "destroy", 40 G_CALLBACK(gtk_widget_destroyed), 41 &widget_); 42 } 43 } 44 DisconnectDestroyHandler()45 void FocusStoreGtk::DisconnectDestroyHandler() { 46 if (widget_) { 47 g_signal_handler_disconnect(widget_, destroy_handler_id_); 48 widget_ = NULL; 49 } 50 } 51