/*

    Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>

    Copyright (C) 2006 Apple Computer, Inc.

    Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>

    Copyright (C) 2007, 2008, 2009 Rob Buis <buis@kde.org>

    Copyright (C) 2009, Google, Inc.

    Copyright (C) 2009 Dirk Schulze <krit@webkit.org>

    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)

#include "RenderSVGImage.h"

#include "Attr.h"

#include "FloatConversion.h"

#include "FloatQuad.h"

#include "GraphicsContext.h"

#include "PointerEventsHitRules.h"

#include "RenderLayer.h"

#include "RenderSVGResourceContainer.h"

#include "RenderSVGResourceFilter.h"

#include "SVGImageElement.h"

#include "SVGLength.h"

#include "SVGPreserveAspectRatio.h"

#include "SVGRenderSupport.h"

namespace WebCore {

RenderSVGImage::RenderSVGImage(SVGImageElement* impl)

    : RenderImage(impl)

    , m_needsTransformUpdate(true)

{

}

void RenderSVGImage::layout()

{

    ASSERT(needsLayout());

    LayoutRepainter repainter(*this, m_everHadLayout && checkForRepaintDuringLayout());

    SVGImageElement* image = static_cast<SVGImageElement*>(node());

    if (m_needsTransformUpdate) {

        m_localTransform = image->animatedLocalTransform();

        m_needsTransformUpdate = false;

    }

    // minimum height

    setHeight(errorOccurred() ? intrinsicSize().height() : 0);

    calcWidth();

    calcHeight();

    // FIXME: Optimize caching the repaint rects.

    m_localBounds = FloatRect(image->x().value(image), image->y().value(image), image->width().value(image), image->height().value(image));

    m_cachedLocalRepaintRect = FloatRect();

    // Invalidate all resources of this client, if we changed something.

    if (m_everHadLayout && selfNeedsLayout())

        RenderSVGResource::invalidateAllResourcesOfRenderer(this);

    repainter.repaintAfterLayout();

    setNeedsLayout(false);

}

void RenderSVGImage::paint(PaintInfo& paintInfo, int, int)

{

    if (paintInfo.context->paintingDisabled() || style()->visibility() == HIDDEN)

        return;

    paintInfo.context->save();

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

    if (paintInfo.phase == PaintPhaseForeground) {

        PaintInfo savedInfo(paintInfo);

        if (SVGRenderSupport::prepareToRenderSVGContent(this, paintInfo)) {

            FloatRect destRect = m_localBounds;

            FloatRect srcRect(0, 0, image()->width(), image()->height());

            SVGImageElement* imageElt = static_cast<SVGImageElement*>(node());

            if (imageElt->preserveAspectRatio().align() != SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE)

                imageElt->preserveAspectRatio().transformRect(destRect, srcRect);

            paintInfo.context->drawImage(image(), DeviceColorSpace, destRect, srcRect);

        }

        SVGRenderSupport::finishRenderSVGContent(this, paintInfo, savedInfo.context);

    }

    if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth())

        paintOutline(paintInfo.context, 0, 0, width(), height());

    paintInfo.context->restore();

}

void RenderSVGImage::destroy()

{

    RenderSVGResource::invalidateAllResourcesOfRenderer(this);

    RenderImage::destroy();

}

bool RenderSVGImage::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)

{

    // We only draw in the forground phase, so we only hit-test then.

    if (hitTestAction != HitTestForeground)

        return false;

    PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_IMAGE_HITTESTING, request, style()->pointerEvents());

    bool isVisible = (style()->visibility() == VISIBLE);

    if (isVisible || !hitRules.requireVisible) {

        FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);

        if (!SVGRenderSupport::pointInClippingArea(this, localPoint))

            return false;

        if (hitRules.canHitFill) {

            if (m_localBounds.contains(localPoint)) {

                updateHitTestResult(result, roundedIntPoint(localPoint));

                return true;

            }

        }

    }

    return false;

}

bool RenderSVGImage::nodeAtPoint(const HitTestRequest&, HitTestResult&, int, int, int, int, HitTestAction)

{

    ASSERT_NOT_REACHED();

    return false;

}

FloatRect RenderSVGImage::repaintRectInLocalCoordinates() const

{

    // If we already have a cached repaint rect, return that

    if (!m_cachedLocalRepaintRect.isEmpty())

        return m_cachedLocalRepaintRect;

    m_cachedLocalRepaintRect = m_localBounds;

    SVGRenderSupport::intersectRepaintRectWithResources(this, m_cachedLocalRepaintRect);

    return m_cachedLocalRepaintRect;

}

void RenderSVGImage::imageChanged(WrappedImagePtr image, const IntRect* rect)

{

    RenderImage::imageChanged(image, rect);

#if ENABLE(FILTERS)

    // The image resource defaults to nullImage until the resource arrives.

    // This empty image may be cached by SVG filter effects which must be invalidated.

    if (RenderSVGResourceFilter* filter = getRenderSVGResourceById<RenderSVGResourceFilter>(document(), style()->svgStyle()->filterResource()))

        filter->invalidateClient(this);

#endif

    repaint();

}

IntRect RenderSVGImage::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer)

{

    return SVGRenderSupport::clippedOverflowRectForRepaint(this, repaintContainer);

}

void RenderSVGImage::computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect& repaintRect, bool fixed)

{

    SVGRenderSupport::computeRectForRepaint(this, repaintContainer, repaintRect, fixed);

}

void RenderSVGImage::mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed , bool useTransforms, TransformState& transformState) const

{

    SVGRenderSupport::mapLocalToContainer(this, repaintContainer, fixed, useTransforms, transformState);

}

void RenderSVGImage::addFocusRingRects(Vector<IntRect>& rects, int, int)

{

    // this is called from paint() after the localTransform has already been applied

    IntRect contentRect = enclosingIntRect(repaintRectInLocalCoordinates());

    if (!contentRect.isEmpty())

        rects.append(contentRect);

}

void RenderSVGImage::absoluteRects(Vector<IntRect>&, int, int)

{

    // This code path should never be taken for SVG, as we're assuming useTransforms=true everywhere, absoluteQuads should be used.

    ASSERT_NOT_REACHED();

}

void RenderSVGImage::absoluteQuads(Vector<FloatQuad>& quads)

{

    quads.append(localToAbsoluteQuad(strokeBoundingBox()));

}

}

#endif // ENABLE(SVG)