/*

 * This file is part of the WebKit project.

 *

 * Copyright (C) 2006 Apple Computer, Inc.

 *               2006 Alexander Kellett <lypanov@kde.org>

 *               2006 Oliver Hunt <ojh16@student.canterbury.ac.nz>

 *               2007 Nikolas Zimmermann <zimmermann@kde.org>

 *               2008 Rob Buis <buis@kde.org>

 *               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 "RenderSVGText.h"

#include "FloatConversion.h"

#include "FloatQuad.h"

#include "GraphicsContext.h"

#include "HitTestRequest.h"

#include "PointerEventsHitRules.h"

#include "RenderLayer.h"

#include "RenderSVGResource.h"

#include "RenderSVGRoot.h"

#include "SVGLengthList.h"

#include "SVGRenderSupport.h"

#include "SVGRootInlineBox.h"

#include "SVGTextElement.h"

#include "SVGTransformList.h"

#include "SVGURIReference.h"

#include "SimpleFontData.h"

#include "TransformState.h"

namespace WebCore {

RenderSVGText::RenderSVGText(SVGTextElement* node) 

    : RenderSVGBlock(node)

    , m_needsTransformUpdate(true)

{

}

IntRect RenderSVGText::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer)

{

    return SVGRenderSupport::clippedOverflowRectForRepaint(this, repaintContainer);

}

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

{

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

}

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

{

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

}

void RenderSVGText::layout()

{

    ASSERT(needsLayout());

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

    if (m_needsTransformUpdate) {

        SVGTextElement* text = static_cast<SVGTextElement*>(node());

        m_localTransform = text->animatedLocalTransform();

        m_needsTransformUpdate = false;

    }

    // Reduced version of RenderBlock::layoutBlock(), which only takes care of SVG text.

    // All if branches that could cause early exit in RenderBlocks layoutBlock() method are turned into assertions.

    ASSERT(!isInline());

    ASSERT(!layoutOnlyPositionedObjects());

    ASSERT(!scrollsOverflow());

    ASSERT(!hasControlClip());

    ASSERT(!hasColumns());

    ASSERT(!positionedObjects());

    ASSERT(!m_overflow);

    ASSERT(!isAnonymousBlock());

    if (!firstChild())

        setChildrenInline(true);

    ASSERT(childrenInline());

    forceLayoutInlineChildren();

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

    if (m_everHadLayout && selfNeedsLayout())

        RenderSVGResource::invalidateAllResourcesOfRenderer(this);

    repainter.repaintAfterLayout();

    setNeedsLayout(false);

}

RootInlineBox* RenderSVGText::createRootInlineBox() 

{

    RootInlineBox* box = new (renderArena()) SVGRootInlineBox(this);

    box->setHasVirtualHeight();

    return box;

}

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

{

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

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

    if (isVisible || !hitRules.requireVisible) {

        if ((hitRules.canHitStroke && (style()->svgStyle()->hasStroke() || !hitRules.requireStroke))

            || (hitRules.canHitFill && (style()->svgStyle()->hasFill() || !hitRules.requireFill))) {

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

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

                return false;       

            return RenderBlock::nodeAtPoint(request, result, (int)localPoint.x(), (int)localPoint.y(), 0, 0, hitTestAction);

        }

    }

    return false;

}

void RenderSVGText::destroy()

{

    RenderSVGResource::invalidateAllResourcesOfRenderer(this);

    RenderSVGBlock::destroy();

}

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

{

    ASSERT_NOT_REACHED();

    return false;

}

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

{

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

}

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

{

    if (paintInfo.context->paintingDisabled())

        return;

    if (paintInfo.phase != PaintPhaseForeground

     && paintInfo.phase != PaintPhaseSelfOutline

     && paintInfo.phase != PaintPhaseSelection)

         return;

    PaintInfo blockInfo(paintInfo);

    blockInfo.context->save();

    blockInfo.applyTransform(localToParentTransform());

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

    blockInfo.context->restore();

}

FloatRect RenderSVGText::strokeBoundingBox() const

{

    FloatRect strokeBoundaries = objectBoundingBox();

    if (!style()->svgStyle()->hasStroke())

        return strokeBoundaries;

    strokeBoundaries.inflate(SVGRenderStyle::cssPrimitiveToLength(this, style()->svgStyle()->strokeWidth(), 1.0f));

    return strokeBoundaries;

}

FloatRect RenderSVGText::repaintRectInLocalCoordinates() const

{

    FloatRect repaintRect = strokeBoundingBox();

    SVGRenderSupport::intersectRepaintRectWithResources(this, repaintRect);

    return repaintRect;

}

// Fix for <rdar://problem/8048875>. We should not render :first-line CSS Style

// in a SVG text element context.

RenderBlock* RenderSVGText::firstLineBlock() const

{

    return 0;

}

// Fix for <rdar://problem/8048875>. We should not render :first-letter CSS Style

// in a SVG text element context.

void RenderSVGText::updateFirstLetter()

{

}

}

#endif // ENABLE(SVG)