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// Copyright (c) 2010 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 APP_MENUS_ACCELERATOR_H_
#define APP_MENUS_ACCELERATOR_H_
#pragma once
#include "app/keyboard_codes.h"
namespace menus {
// This is a cross-platform base class for accelerator keys used in menus. It is
// meant to be subclassed for concrete toolkit implementations.
class Accelerator {
public:
Accelerator() : key_code_(app::VKEY_UNKNOWN), modifiers_(0) {}
Accelerator(app::KeyboardCode keycode, int modifiers)
: key_code_(keycode),
modifiers_(modifiers) {}
Accelerator(const Accelerator& accelerator) {
key_code_ = accelerator.key_code_;
modifiers_ = accelerator.modifiers_;
}
virtual ~Accelerator() {}
Accelerator& operator=(const Accelerator& accelerator) {
if (this != &accelerator) {
key_code_ = accelerator.key_code_;
modifiers_ = accelerator.modifiers_;
}
return *this;
}
// We define the < operator so that the KeyboardShortcut can be used as a key
// in a std::map.
bool operator <(const Accelerator& rhs) const {
if (key_code_ != rhs.key_code_)
return key_code_ < rhs.key_code_;
return modifiers_ < rhs.modifiers_;
}
bool operator ==(const Accelerator& rhs) const {
return (key_code_ == rhs.key_code_) && (modifiers_ == rhs.modifiers_);
}
bool operator !=(const Accelerator& rhs) const {
return !(*this == rhs);
}
app::KeyboardCode GetKeyCode() const {
return key_code_;
}
int modifiers() const {
return modifiers_;
}
protected:
// The keycode (VK_...).
app::KeyboardCode key_code_;
// The state of the Shift/Ctrl/Alt keys (platform-dependent).
int modifiers_;
};
// Since acclerator code is one of the few things that can't be cross platform
// in the chrome UI, separate out just the GetAcceleratorForCommandId() from
// the menu delegates.
class AcceleratorProvider {
public:
// Gets the accelerator for the specified command id. Returns true if the
// command id has a valid accelerator, false otherwise.
virtual bool GetAcceleratorForCommandId(
int command_id,
menus::Accelerator* accelerator) = 0;
protected:
virtual ~AcceleratorProvider() {}
};
}
#endif // APP_MENUS_ACCELERATOR_H_
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