RenderPartObject.cpp   [plain text]

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 2000 Simon Hausmann <hausmann@kde.org>
 *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
 * Copyright (C) 2004, 2005, 2006, 2008, 2009 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.
 *
 */

#include "config.h"
#include "RenderPartObject.h"

#include "Frame.h"
#include "FrameLoaderClient.h"
#include "HTMLEmbedElement.h"
#include "HTMLIFrameElement.h"
#include "HTMLNames.h"
#include "HTMLObjectElement.h"
#include "HTMLParamElement.h"
#include "MIMETypeRegistry.h"
#include "Page.h"
#include "RenderView.h"
#include "RenderWidgetProtector.h"
#include "Settings.h"
#include "Text.h"

#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
#include "HTMLVideoElement.h"
#endif

namespace WebCore {

using namespace HTMLNames;

RenderPartObject::RenderPartObject(Element* element)
    : RenderPart(element)
{
}

bool RenderPartObject::flattenFrame()
{
    if (!node() || !node()->hasTagName(iframeTag))
        return false;

    HTMLIFrameElement* element = static_cast<HTMLIFrameElement*>(node());
    bool isScrollable = element->scrollingMode() != ScrollbarAlwaysOff;

    if (!isScrollable && style()->width().isFixed()
        && style()->height().isFixed())
        return false;

    Frame* frame = element->document()->frame();
    bool enabled = frame && frame->settings()->frameFlatteningEnabled();

    if (!enabled || !frame->page())
        return false;

    FrameView* view = frame->page()->mainFrame()->view();
    if (!view)
        return false;

    // Do not flatten offscreen inner frames during frame flattening.
    return absoluteBoundingBoxRect().intersects(IntRect(IntPoint(0, 0), view->contentsSize()));
}

void RenderPartObject::calcHeight()
{
    RenderPart::calcHeight();
    if (!flattenFrame())
         return;

    HTMLIFrameElement* frame = static_cast<HTMLIFrameElement*>(node());
    bool isScrollable = frame->scrollingMode() != ScrollbarAlwaysOff;

    if (isScrollable || !style()->height().isFixed()) {
        FrameView* view = static_cast<FrameView*>(widget());
        if (!view)
            return;
        int border = borderTop() + borderBottom();
        setHeight(max(height(), view->contentsHeight() + border));
    }
}

void RenderPartObject::calcWidth()
{
    RenderPart::calcWidth();
    if (!flattenFrame())
        return;

    HTMLIFrameElement* frame = static_cast<HTMLIFrameElement*>(node());
    bool isScrollable = frame->scrollingMode() != ScrollbarAlwaysOff;

    if (isScrollable || !style()->width().isFixed()) {
        FrameView* view = static_cast<FrameView*>(widget());
        if (!view)
            return;
        int border = borderLeft() + borderRight();
        setWidth(max(width(), view->contentsWidth() + border));
    }
}

void RenderPartObject::layout()
{
    ASSERT(needsLayout());

    RenderPart::calcWidth();
    RenderPart::calcHeight();

    if (flattenFrame()) {
        layoutWithFlattening(style()->width().isFixed(), style()->height().isFixed());
        return;
    }

    RenderPart::layout();

    m_overflow.clear();
    addShadowOverflow();

    setNeedsLayout(false);
}

void RenderPartObject::viewCleared()
{
    if (node() && widget() && widget()->isFrameView()) {
        FrameView* view = static_cast<FrameView*>(widget());
        int marginw = -1;
        int marginh = -1;
        if (node()->hasTagName(iframeTag)) {
            HTMLIFrameElement* frame = static_cast<HTMLIFrameElement*>(node());
            marginw = frame->getMarginWidth();
            marginh = frame->getMarginHeight();
        }
        if (marginw != -1)
            view->setMarginWidth(marginw);
        if (marginh != -1)
            view->setMarginHeight(marginh);
    }
}

}