/*

 * This file is part of the WebKit project.

 *

 * Copyright (C) 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"

#if ENABLE(SVG) && ENABLE(SVG_EXPERIMENTAL_FEATURES)

#include "RenderForeignObject.h"

#include "GraphicsContext.h"

#include "RenderView.h"

#include "SVGForeignObjectElement.h"

#include "SVGLength.h"

namespace WebCore {

RenderForeignObject::RenderForeignObject(SVGForeignObjectElement* node) 

    : RenderSVGBlock(node)

{

}

AffineTransform RenderForeignObject::translationForAttributes()

{

    SVGForeignObjectElement* foreign = static_cast<SVGForeignObjectElement*>(element());

    return AffineTransform().translate(foreign->x().value(), foreign->y().value());

}

void RenderForeignObject::paint(PaintInfo& paintInfo, int parentX, int parentY)

{

    if (paintInfo.context->paintingDisabled())

        return;

    paintInfo.context->save();

    paintInfo.context->concatCTM(AffineTransform().translate(parentX, parentY));

    paintInfo.context->concatCTM(localTransform());

    paintInfo.context->concatCTM(translationForAttributes());

    paintInfo.context->clip(getClipRect(parentX, parentY));

    float opacity = style()->opacity();

    if (opacity < 1.0f)

        // FIXME: Possible optimization by clipping to bbox here, once relativeBBox is implemented & clip, mask and filter support added.

        paintInfo.context->beginTransparencyLayer(opacity);

    PaintInfo pi(paintInfo);

    pi.rect = absoluteTransform().inverse().mapRect(paintInfo.rect);

    RenderBlock::paint(pi, 0, 0);

    if (opacity < 1.0f)

        paintInfo.context->endTransparencyLayer();

    paintInfo.context->restore();

}

void RenderForeignObject::computeAbsoluteRepaintRect(IntRect& r, bool f)

{

    AffineTransform transform = translationForAttributes() * localTransform();

    r = transform.mapRect(r);

    RenderBlock::computeAbsoluteRepaintRect(r, f);

}

bool RenderForeignObject::requiresLayer()

{

    return false;

}

void RenderForeignObject::layout()

{

    ASSERT(needsLayout());

    // Arbitrary affine transforms are incompatible with LayoutState.

    view()->disableLayoutState();

    IntRect oldBounds;

    IntRect oldOutlineBox;

    bool checkForRepaint = checkForRepaintDuringLayout();

    if (checkForRepaint) {

        oldBounds = m_absoluteBounds;

        oldOutlineBox = absoluteOutlineBox();

    }

    RenderBlock::layout();

    m_absoluteBounds = absoluteClippedOverflowRect();

    if (checkForRepaint)

        repaintAfterLayoutIfNeeded(oldBounds, oldOutlineBox);

    view()->enableLayoutState();

    setNeedsLayout(false);

}

bool RenderForeignObject::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, HitTestAction hitTestAction)

{

    AffineTransform totalTransform = absoluteTransform();

    totalTransform *= translationForAttributes();

    double localX, localY;

    totalTransform.inverse().map(x, y, &localX, &localY);

    return RenderBlock::nodeAtPoint(request, result, static_cast<int>(localX), static_cast<int>(localY), tx, ty, hitTestAction);

}

} // namespace WebCore

#endif // ENABLE(SVG)