InputManager/AcceleratorManager for athena

athena/input/public/accelerator_manager.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 ATHENA_INPUT_PUBLIC_ACCELERATOR_MANAGER_H_
+#define ATHENA_INPUT_PUBLIC_ACCELERATOR_MANAGER_H_
+
+#include "athena/athena_export.h"
+#include "ui/events/keycodes/keyboard_codes.h"
+
+namespace ui {
+class Accelerator;
+}
+
+namespace athena {
+
+enum TriggerEvent {
+  TRIGGER_ON_PRESS,
+  TRIGGER_ON_RELEASE,
+};
+
+// Accelerator flags.
+enum AcceleratorFlags {
+  AF_NONE = 0,
+  // Used for accelerators that should not be fired on auto repeated
+  // key event, such as toggling fullscrren.
+  AF_NON_AUTO_REPEATABLE = 1 << 0,
+  // Most key events are sent to applications first as they may
+  // want to consume them. Reserverd accelerators are reserved for OS
+  // and cannot be consumed by apps. (such as window cycling)
+  AF_RESERVED = 1 << 1,
+  // Used for accelerators that are useful only in debug mode.
+  AF_DEBUG = 1 << 2,
+};
+
+struct AcceleratorData {
+  // true if the accelerator should be triggered upon ui::ET_KEY_PRESSED
+  TriggerEvent trigger_event;
+  ui::KeyboardCode keycode;  // KeyEvent event flags.
+  int keyevent_flags;        // Combination of ui::KeyEventFlags
+  int command_id;            // ID to distinguish
+  int accelerator_flags;     // Combination of AcceleratorFlags;
+};
+
+// An interface that implements behavior for the set of
+// accelerators.
+class ATHENA_EXPORT AcceleratorHandler {
+ public:
+  virtual ~AcceleratorHandler() {}
+
+  virtual bool IsCommandEnabled(int command_id) const = 0;
+  virtual bool OnAcceleratorFired(int command_id,
+                                  const ui::Accelerator& accelerator) = 0;
+};
+
+class AcceleratorManager {
+ public:
+  virtual ~AcceleratorManager() {}
+
+  // Register accelerators and its handler that will be invoked when
+  // one of accelerator is fired.
+  virtual void RegisterAccelerators(const AcceleratorData accelerators[],
+                                    size_t num_accelerators,
+                                    AcceleratorHandler* handler) = 0;
+
+  // Enables accelerators that has a AF_DEBUG flag.
+  virtual void EnableDebugAccelerators() = 0;
+};
+
+}  // namespace athena
+
+#endif  // ATHENA_INPUT_PUBLIC_ACCELERATOR_MANAGER_H_