overflowevent.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2006, 2007 Apple 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:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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. 
 */

#include "config.h"
#include "OverflowEvent.h"

#include "EventNames.h"

namespace WebCore {
        
OverflowEvent::OverflowEvent()
    : Event(eventNames().overflowchangedEvent, false, false)
    , m_orient(VERTICAL)
    , m_horizontalOverflow(false)
    , m_verticalOverflow(false)
{
}

OverflowEvent::OverflowEvent(bool horizontalOverflowChanged, bool horizontalOverflow, bool verticalOverflowChanged, bool verticalOverflow)
    : Event(eventNames().overflowchangedEvent, false, false)
    , m_horizontalOverflow(horizontalOverflow)
    , m_verticalOverflow(verticalOverflow)
{
    ASSERT(horizontalOverflowChanged || verticalOverflowChanged);

    if (horizontalOverflowChanged && verticalOverflowChanged)
        m_orient = BOTH;
    else if (horizontalOverflowChanged)
        m_orient = HORIZONTAL;
    else
        m_orient = VERTICAL;
}

bool OverflowEvent::isOverflowEvent() const
{
    return true;
}

void OverflowEvent::initOverflowEvent(unsigned short orient, bool horizontalOverflow, bool verticalOverflow)
{
    if (dispatched())
        return;
    
    m_orient = orient;
    m_horizontalOverflow = horizontalOverflow;
    m_verticalOverflow = verticalOverflow;
}

}