renderpart.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

/**
 * This file is part of the KDE project.
 *
 * Copyright (C) 1999 Lars Knoll ([e-mail])
 *           (C) 2000 Simon Hausmann <[e-mail]>
 *           (C) 2000 Stefan Schimanski ([e-mail])
 * Copyright (C) 2004, 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., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */
#include "config.h"
#include "RenderPart.h"

#include "Document.h"
#include "Frame.h"
#include "FrameTree.h"
#include "FrameView.h"
#include "HTMLFrameOwnerElement.h"
#include "HTMLNames.h"
#include "Page.h"

namespace WebCore {

using namespace HTMLNames;

RenderPart::RenderPart(Element* node)
    : RenderWidget(node)
{
    // init RenderObject attributes
    setInline(false);
}

RenderPart::~RenderPart()
{
    // Since deref ends up calling setWidget back on us, need to make sure
    // that widget is already 0 so it won't do any work.
    Widget* widget = m_widget;
    m_widget = 0;
    if (widget && widget->isFrameView())
        static_cast<FrameView*>(widget)->deref();
    else
        delete widget;
}

void RenderPart::setWidget(Widget* widget)
{
    if (widget != m_widget) {
        if (widget && widget->isFrameView())
            static_cast<FrameView*>(widget)->ref();
        RenderWidget::setWidget(widget);

        // make sure the scrollbars are set correctly for restore
        // ### find better fix
        viewCleared();
    }
}

void RenderPart::viewCleared()
{
}

void RenderPart::deleteWidget()
{
    if (m_widget && m_widget->isFrameView())
        static_cast<FrameView*>(m_widget)->deref();
    else
        delete m_widget;
}

}