Move processing out of AcceleratorDelegate

ash/common/accelerators/accelerator_router.h

+// Copyright 2016 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 ASH_ACCELERATORS_ACCELERATOR_ROUTER_H_
+#define ASH_ACCELERATORS_ACCELERATOR_ROUTER_H_
+
+#include "ash/ash_export.h"
+#include "base/macros.h"
+
+namespace ui {
+class Accelerator;
+class KeyEvent;
+}
+
+namespace ash {
+
+class WmWindow;
+
+// AcceleratorRouter does a minimal amount of processing before routing the
+// accelerator to the AcceleratorController. AcceleratorRouter may also decide
+// not to process certain accelerators.
+class ASH_EXPORT AcceleratorRouter {
+ public:
+  AcceleratorRouter();
+  ~AcceleratorRouter();
+
+  // Returns true if event should be consumed. |target| is the target of the
+  // event.
+  bool ProcessAccelerator(WmWindow* target,
+                          const ui::KeyEvent& event,
+                          const ui::Accelerator& accelerator);
+
+ private:
+  // Returns true if the window should be allowed a chance to handle
+  // system keys.
+  bool CanConsumeSystemKeys(WmWindow* target, const ui::KeyEvent& event);
+
+  // Returns true if the |accelerator| should be processed now.
+  bool ShouldProcessAcceleratorNow(WmWindow* target,
+                                   const ui::KeyEvent& event,
+                                   const ui::Accelerator& accelerator);
+
+  DISALLOW_COPY_AND_ASSIGN(AcceleratorRouter);
+};
+
+}  // namespace ash
+
+#endif  // ASH_ACCELERATORS_ACCELERATOR_ROUTER_H_