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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.
#ifndef VIEWS_CONTROLS_MENU_NESTED_DISPATCHER_GTK_H_
#define VIEWS_CONTROLS_MENU_NESTED_DISPATCHER_GTK_H_
#pragma once
#include "base/message_loop.h"
#if defined(TOUCH_UI)
typedef union _XEvent XEvent;
#endif
namespace views {
// A nested dispatcher that can out-live the creator of this
// dispatcher. This is to deal with the scenario where a menu object
// is deleted while it's handling the message loop. Note that
// |RunAndSelfDestruct| method always delete itself regardless of
// whether or not the menu object is deleted, so a menu object should
// create a new instance for each open request.
// http://crosbug.com/7228, http://crosbug.com/7929
class NestedDispatcherGtk : public MessageLoopForUI::Dispatcher {
public:
NestedDispatcherGtk(MessageLoopForUI::Dispatcher* creator,
bool allow_nested_task);
// Run the messsage loop and returns if the menu has been
// deleted in the nested loop. Returns true if the menu is
// deleted, or false otherwise.
bool RunAndSelfDestruct();
// Tells the nested dispatcher that creator has been destroyed.
void CreatorDestroyed();
private:
virtual ~NestedDispatcherGtk() {}
#if defined(TOUCH_UI)
virtual base::MessagePumpDispatcher::DispatchStatus Dispatch(XEvent* xevent);
#else
// Overriden from MessageLoopForUI::Dispatcher:
virtual bool Dispatch(GdkEvent* event);
#endif
// Creator of the nested loop.
MessageLoopForUI::Dispatcher* creator_;
// True to allow nested task in the message loop.
bool allow_nested_task_;
DISALLOW_COPY_AND_ASSIGN(NestedDispatcherGtk);
};
} // namespace views
#endif // VIEWS_CONTROLS_MENU_NESTED_DISPATCHER_GTK_H_
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