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// Copyright 2014 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 CHROME_BROWSER_CHROMEOS_EVENTS_EVENT_REWRITER_CONTROLLER_H_
#define CHROME_BROWSER_CHROMEOS_EVENTS_EVENT_REWRITER_CONTROLLER_H_
#include <list>
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"
#include "ui/aura/env_observer.h"
#include "ui/events/event_rewriter.h"
namespace ui {
class EventSource;
} // namespace ui
namespace chromeos {
// Owns |ui::EventRewriter|s and ensures that they are added to all root
// windows |EventSource|s, current and future, in the order that they are
// added to this.
class EventRewriterController : public aura::EnvObserver {
public:
EventRewriterController();
virtual ~EventRewriterController();
// Takes ownership of an EventRewriter; can only be called before Init().
void AddEventRewriter(scoped_ptr<ui::EventRewriter> rewriter);
// Add rewriters to any existing root windows; must be called once only
// after ash::Shell has been initialized.
void Init();
// aura::EnvObserver overrides:
virtual void OnWindowInitialized(aura::Window* window) override {}
virtual void OnHostInitialized(aura::WindowTreeHost* host) override;
private:
typedef std::list<ui::EventSource*> EventSourceList;
typedef ScopedVector<ui::EventRewriter> EventRewriters;
void AddToEventSource(ui::EventSource* source);
// The |EventRewriter|s managed by this controller.
EventRewriters rewriters_;
// Whether the owned event rewriters have been added to existing
// root windows; after this no more rewriters can be added.
bool initialized_;
DISALLOW_COPY_AND_ASSIGN(EventRewriterController);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_EVENTS_EVENT_REWRITER_CONTROLLER_H_
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