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mojo/services/window_manager/capture_controller.h

+// 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 SERVICES_WINDOW_MANAGER_CAPTURE_CONTROLLER_H_
+#define SERVICES_WINDOW_MANAGER_CAPTURE_CONTROLLER_H_
+
+#include "base/observer_list.h"
+#include "third_party/mojo_services/src/view_manager/public/cpp/view_observer.h"
+
+namespace window_manager {
+
+class CaptureControllerObserver;
+
+// Manages input capture. A view which has capture will take all input events.
+class CaptureController : public mojo::ViewObserver {
+ public:
+  CaptureController();
+  ~CaptureController() override;
+
+  void AddObserver(CaptureControllerObserver* observer);
+  void RemoveObserver(CaptureControllerObserver* observer);
+
+  void SetCapture(mojo::View* view);
+  void ReleaseCapture(mojo::View* view);
+  mojo::View* GetCapture();
+
+ private:
+  void NotifyCaptureChange(mojo::View* new_capture, mojo::View* old_capture);
+
+  // Overridden from ViewObserver:
+  void OnViewDestroying(mojo::View* view) override;
+
+  // The current capture view. Null if there is no capture view.
+  mojo::View* capture_view_;
+
+  ObserverList<CaptureControllerObserver> capture_controller_observers_;
+
+  DISALLOW_COPY_AND_ASSIGN(CaptureController);
+};
+
+void SetCaptureController(mojo::View* view,
+                          CaptureController* capture_controller);
+CaptureController* GetCaptureController(mojo::View* view);
+mojo::View* GetCaptureView(mojo::View* view);
+
+}  // namespace window_manager
+
+#endif  // SERVICES_WINDOW_MANAGER_CAPTURE_CONTROLLER_H_