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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This class describe a keyboard accelerator (or keyboard shortcut).
// Keyboard accelerators are registered with the FocusManager.
// It has a copy constructor and assignment operator so that it can be copied.
// It also defines the < operator so that it can be used as a key in a std::map.
//
#ifndef CHROME_VIEWS_ACCELERATOR_H__
#define CHROME_VIEWS_ACCELERATOR_H__
#include "chrome/views/event.h"
namespace ChromeViews {
class Accelerator {
public:
Accelerator(int keycode,
bool shift_pressed, bool ctrl_pressed, bool alt_pressed)
: key_code_(keycode) {
modifiers_ = 0;
if (shift_pressed)
modifiers_ |= Event::EF_SHIFT_DOWN;
if (ctrl_pressed)
modifiers_ |= Event::EF_CONTROL_DOWN;
if (alt_pressed)
modifiers_ |= Event::EF_ALT_DOWN;
}
Accelerator(const Accelerator& accelerator) {
key_code_ = accelerator.key_code_;
modifiers_ = accelerator.modifiers_;
}
~Accelerator() { };
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 IsShiftDown() const {
return (modifiers_ & Event::EF_SHIFT_DOWN) == Event::EF_SHIFT_DOWN;
}
bool IsCtrlDown() const {
return (modifiers_ & Event::EF_CONTROL_DOWN) == Event::EF_CONTROL_DOWN;
}
bool IsAltDown() const {
return (modifiers_ & Event::EF_ALT_DOWN) == Event::EF_ALT_DOWN;
}
int GetKeyCode() const {
return key_code_;
}
// Returns a string with the localized shortcut if any.
std::wstring GetShortcutText() const;
private:
// The window keycode (VK_...).
int key_code_;
// The state of the Shift/Ctrl/Alt keys (see event.h).
int modifiers_;
};
// An interface that classes that want to register for keyboard accelerators
// should implement.
class AcceleratorTarget {
public:
// This method should return true if the accelerator was processed.
virtual bool AcceleratorPressed(const Accelerator& accelerator) = 0;
};
}
#endif // #ifndef CHROME_VIEWS_ACCELERATOR_H__
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