Separates out accelerators using non-common types

ash/accelerators/accelerator_controller_delegate.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_CONTROLLER_DELEGATE_H_
+#define ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_DELEGATE_H_
+
+#include "ash/accelerators/accelerator_table.h"
+#include "ash/ash_export.h"
+
+namespace ui {
+class Accelerator;
+}
+
+namespace ash {
+
+// Used by AcceleratorController to handle environment specific commands. This
+// file is temporary while ash supports both mus and aura.
+class ASH_EXPORT AcceleratorControllerDelegate {
+ public:
+  // Returns true if the delegate is responsible for handling |action|. This
+  // should not return whether the action may be enabled, only if this delegate
+  // handles the action.
+  virtual bool HandlesAction(AcceleratorAction action) = 0;
+
+  // Returns true if the delegate can perform the action at this time. Only
+  // invoked if HandlesAction() returns true.
+  virtual bool CanPerformAction(
+      AcceleratorAction action,
+      const ui::Accelerator& accelerator,
+      const ui::Accelerator& previous_accelerator) = 0;
+
+  // Performs the specified action.
+  virtual void PerformAction(AcceleratorAction action,
+                             const ui::Accelerator& accelerator) = 0;
+
+  // Shows a warning the user is using a deprecated accelerator.
+  virtual void ShowDeprecatedAcceleratorNotification(
+      const char* const notification_id,
+      int message_id,
+      int old_shortcut_id,
+      int new_shortcut_id) = 0;
+
+ protected:
+  virtual ~AcceleratorControllerDelegate() {}
+};

[James Cook, 2016/07/20 16:08:04]

Nice documentation in this class.

+
+}  // namespace ash
+
+#endif  // ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_DELEGATE_H_