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/*
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
* Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef Event_h
#define Event_h
#include "Clipboard.h"
#include "DOMTimeStamp.h"
#include <wtf/RefCounted.h>
#include <wtf/text/AtomicString.h>
namespace WebCore {
class EventTarget;
class EventDispatcher;
class HTMLIFrameElement;
class MemoryInstrumentation;
struct EventInit {
EventInit();
bool bubbles;
bool cancelable;
};
class Event : public RefCounted<Event> {
public:
enum PhaseType {
NONE = 0,
CAPTURING_PHASE = 1,
AT_TARGET = 2,
BUBBLING_PHASE = 3
};
enum EventType {
MOUSEDOWN = 1,
MOUSEUP = 2,
MOUSEOVER = 4,
MOUSEOUT = 8,
MOUSEMOVE = 16,
MOUSEDRAG = 32,
CLICK = 64,
DBLCLICK = 128,
KEYDOWN = 256,
KEYUP = 512,
KEYPRESS = 1024,
DRAGDROP = 2048,
FOCUS = 4096,
BLUR = 8192,
SELECT = 16384,
CHANGE = 32768
};
static PassRefPtr<Event> create()
{
return adoptRef(new Event);
}
static PassRefPtr<Event> create(const AtomicString& type, bool canBubble, bool cancelable)
{
return adoptRef(new Event(type, canBubble, cancelable));
}
static PassRefPtr<Event> create(const AtomicString& type, const EventInit& initializer)
{
return adoptRef(new Event(type, initializer));
}
virtual ~Event();
void initEvent(const AtomicString& type, bool canBubble, bool cancelable);
const AtomicString& type() const { return m_type; }
EventTarget* target() const { return m_target.get(); }
void setTarget(PassRefPtr<EventTarget>);
EventTarget* currentTarget() const { return m_currentTarget; }
void setCurrentTarget(EventTarget* currentTarget) { m_currentTarget = currentTarget; }
unsigned short eventPhase() const { return m_eventPhase; }
void setEventPhase(unsigned short eventPhase) { m_eventPhase = eventPhase; }
bool bubbles() const { return m_canBubble; }
bool cancelable() const { return m_cancelable; }
DOMTimeStamp timeStamp() const { return m_createTime; }
void stopPropagation() { m_propagationStopped = true; }
void stopImmediatePropagation() { m_immediatePropagationStopped = true; }
// IE Extensions
EventTarget* srcElement() const { return target(); } // MSIE extension - "the object that fired the event"
bool returnValue() const { return !defaultPrevented(); }
void setReturnValue(bool returnValue) { setDefaultPrevented(!returnValue); }
Clipboard* clipboardData() const { return isClipboardEvent() ? clipboard() : 0; }
virtual const AtomicString& interfaceName() const;
bool hasInterface(const AtomicString&) const;
// These events are general classes of events.
virtual bool isUIEvent() const;
virtual bool isMouseEvent() const;
virtual bool isKeyboardEvent() const;
virtual bool isTouchEvent() const;
// Drag events are a subset of mouse events.
virtual bool isDragEvent() const;
// These events lack a DOM interface.
virtual bool isClipboardEvent() const;
virtual bool isBeforeTextInsertedEvent() const;
bool propagationStopped() const { return m_propagationStopped || m_immediatePropagationStopped; }
bool immediatePropagationStopped() const { return m_immediatePropagationStopped; }
bool defaultPrevented() const { return m_defaultPrevented; }
void preventDefault() { if (m_cancelable) m_defaultPrevented = true; }
void setDefaultPrevented(bool defaultPrevented) { m_defaultPrevented = defaultPrevented; }
bool defaultHandled() const { return m_defaultHandled; }
void setDefaultHandled() { m_defaultHandled = true; }
bool cancelBubble() const { return m_cancelBubble; }
void setCancelBubble(bool cancel) { m_cancelBubble = cancel; }
Event* underlyingEvent() const { return m_underlyingEvent.get(); }
void setUnderlyingEvent(PassRefPtr<Event>);
virtual bool storesResultAsString() const;
virtual void storeResult(const String&);
virtual Clipboard* clipboard() const { return 0; }
bool isBeingDispatched() const { return eventPhase(); }
virtual void reportMemoryUsage(MemoryObjectInfo*) const;
virtual PassRefPtr<Event> cloneFor(HTMLIFrameElement*) const;
protected:
Event();
Event(const AtomicString& type, bool canBubble, bool cancelable);
Event(const AtomicString& type, const EventInit&);
virtual void receivedTarget();
bool dispatched() const { return m_target; }
private:
AtomicString m_type;
bool m_canBubble;
bool m_cancelable;
bool m_propagationStopped;
bool m_immediatePropagationStopped;
bool m_defaultPrevented;
bool m_defaultHandled;
bool m_cancelBubble;
unsigned short m_eventPhase;
EventTarget* m_currentTarget;
RefPtr<EventTarget> m_target;
DOMTimeStamp m_createTime;
RefPtr<Event> m_underlyingEvent;
};
} // namespace WebCore
#endif // Event_h
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