/*

 * Copyright (C) 2010 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 "RenderFrameBase.h"

#include "FrameView.h"

#include "HTMLFrameElementBase.h"

#include "RenderView.h"

namespace WebCore {

RenderFrameBase::RenderFrameBase(Element* element)

    : RenderPart(element)

{

}

void RenderFrameBase::layoutWithFlattening(bool fixedWidth, bool fixedHeight)

{

    FrameView* childFrameView = static_cast<FrameView*>(widget());

    RenderView* childRoot = childFrameView ? static_cast<RenderView*>(childFrameView->frame()->contentRenderer()) : 0;

    // Do not expand frames which has zero width or height

    if (!width() || !height() || !childRoot) {

        updateWidgetPosition();

        if (childFrameView)

            childFrameView->layout();

        setNeedsLayout(false);

        return;

    }

    // need to update to calculate min/max correctly

    updateWidgetPosition();

    if (childRoot->prefWidthsDirty())

        childRoot->calcPrefWidths();

    // if scrollbars are off, and the width or height are fixed

    // we obey them and do not expand. With frame flattening

    // no subframe much ever become scrollable.

    HTMLFrameElementBase* element = static_cast<HTMLFrameElementBase*>(node());

    bool isScrollable = element->scrollingMode() != ScrollbarAlwaysOff;

    // consider iframe inset border

    int hBorder = borderLeft() + borderRight();

    int vBorder = borderTop() + borderBottom();

    // make sure minimum preferred width is enforced

    if (isScrollable || !fixedWidth) {

        setWidth(max(width(), childRoot->minPrefWidth() + hBorder));

        // update again to pass the new width to the child frame

        updateWidgetPosition();

        childFrameView->layout();

    }

    // expand the frame by setting frame height = content height

    if (isScrollable || !fixedHeight || childRoot->isFrameSet())

        setHeight(max(height(), childFrameView->contentsHeight() + vBorder));

    if (isScrollable || !fixedWidth || childRoot->isFrameSet())

        setWidth(max(width(), childFrameView->contentsWidth() + hBorder));

    updateWidgetPosition();

    ASSERT(!childFrameView->layoutPending());

    ASSERT(!childRoot->needsLayout());

    ASSERT(!childRoot->firstChild() || !childRoot->firstChild()->firstChild() || !childRoot->firstChild()->firstChild()->needsLayout());

    setNeedsLayout(false);

}

}