WebCore/dom/MouseEvent.cpp

/**
 * This file is part of the DOM implementation for KDE.
 *
 * 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, 2005, 2006 Apple Computer, Inc.
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
#include "config.h"
#include "MouseEvent.h"

#include "EventNames.h"

namespace WebCore {

using namespace EventNames;

MouseEvent::MouseEvent()
    : m_button(0)
{
}

MouseEvent::MouseEvent(const AtomicString& eventType, bool canBubble, bool cancelable, AbstractView* view,
                       int detail, int screenX, int screenY, int clientX, int clientY,
                       bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button,
                       EventTargetNode* relatedTarget, Clipboard* clipboard, bool isSimulated)
    : MouseRelatedEvent(eventType, canBubble, cancelable, view, detail, screenX, screenY,
                        clientX, clientY, ctrlKey, altKey, shiftKey, metaKey, isSimulated)
    , m_button(button)
    , m_relatedTarget(relatedTarget)
    , m_clipboard(clipboard)
{
}

MouseEvent::~MouseEvent()
{
}

void MouseEvent::initMouseEvent(const AtomicString& type, bool canBubble, bool cancelable, AbstractView* view,
                                int detail, int screenX, int screenY, int clientX, int clientY,
                                bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
                                unsigned short button, EventTargetNode* relatedTarget)
{
    if (dispatched())
        return;

    initUIEvent(type, canBubble, cancelable, view, detail);

    m_screenX = screenX;
    m_screenY = screenY;
    m_clientX = clientX;
    m_clientY = clientY;
    m_ctrlKey = ctrlKey;
    m_altKey = altKey;
    m_shiftKey = shiftKey;
    m_metaKey = metaKey;
    m_button = button;
    m_relatedTarget = relatedTarget;

    initCoordinates();
}

bool MouseEvent::isMouseEvent() const
{
    return true;
}

bool MouseEvent::isDragEvent() const
{
    const AtomicString& t = type();
    return t == dragenterEvent || t == dragoverEvent || t == dragleaveEvent || t == dropEvent
               || t == dragstartEvent|| t == dragEvent || t == dragendEvent;
}

int MouseEvent::which() const
{
    // For KHTML, the return values for left, middle and right mouse buttons are 0, 1, 2, respectively.
    // For the Netscape "which" property, the return values for left, middle and right mouse buttons are 1, 2, 3, respectively. 
    // So we must add 1.
    return m_button + 1;
}

Node* MouseEvent::toElement() const
{
    // MSIE extension - "the object toward which the user is moving the mouse pointer"
    return (type() == mouseoutEvent) ? relatedTarget() : target();
}

Node* MouseEvent::fromElement() const
{
    // MSIE extension - "object from which activation or the mouse pointer is exiting during the event" (huh?)
    return (type() == mouseoutEvent) ? target() : relatedTarget();
}

} // namespace WebCore