1 // Copyright 2014 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 #ifndef CHROME_BROWSER_CHROMEOS_EVENTS_EVENT_REWRITER_CONTROLLER_H_ 6 #define CHROME_BROWSER_CHROMEOS_EVENTS_EVENT_REWRITER_CONTROLLER_H_ 7 8 #include <list> 9 #include <vector> 10 11 #include "base/memory/scoped_ptr.h" 12 #include "base/memory/scoped_vector.h" 13 #include "ui/aura/env_observer.h" 14 #include "ui/events/event_rewriter.h" 15 16 namespace ui { 17 class EventSource; 18 } // namespace ui 19 20 namespace chromeos { 21 22 // Owns |ui::EventRewriter|s and ensures that they are added to all root 23 // windows |EventSource|s, current and future, in the order that they are 24 // added to this. 25 class EventRewriterController : public aura::EnvObserver { 26 public: 27 EventRewriterController(); 28 virtual ~EventRewriterController(); 29 30 // Takes ownership of an EventRewriter; can only be called before Init(). 31 void AddEventRewriter(scoped_ptr<ui::EventRewriter> rewriter); 32 33 // Add rewriters to any existing root windows; must be called once only 34 // after ash::Shell has been initialized. 35 void Init(); 36 37 // aura::EnvObserver overrides: OnWindowInitialized(aura::Window * window)38 virtual void OnWindowInitialized(aura::Window* window) OVERRIDE {} 39 virtual void OnHostInitialized(aura::WindowTreeHost* host) OVERRIDE; 40 41 private: 42 typedef std::list<ui::EventSource*> EventSourceList; 43 typedef ScopedVector<ui::EventRewriter> EventRewriters; 44 45 void AddToEventSource(ui::EventSource* source); 46 47 // The |EventRewriter|s managed by this controller. 48 EventRewriters rewriters_; 49 50 // Whether the owned event rewriters have been added to existing 51 // root windows; after this no more rewriters can be added. 52 bool initialized_; 53 54 DISALLOW_COPY_AND_ASSIGN(EventRewriterController); 55 }; 56 57 } // namespace chromeos 58 59 #endif // CHROME_BROWSER_CHROMEOS_EVENTS_EVENT_REWRITER_CONTROLLER_H_ 60