renderpath.cpp

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        finishRenderSVGContent(this, paintInfo, boundingBox, filter, savedInfo.context);
    }

    if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth())
        paintOutline(paintInfo.context, static_cast<int>(boundingBox.x()), static_cast<int>(boundingBox.y()),
            static_cast<int>(boundingBox.width()), static_cast<int>(boundingBox.height()), style());
    
    paintInfo.context->restore();
}

void RenderPath::addFocusRingRects(GraphicsContext* graphicsContext, int, int) 
{
    graphicsContext->addFocusRingRect(enclosingIntRect(relativeBBox(true)));
}

void RenderPath::absoluteRects(Vector<IntRect>& rects, int, int, bool)
{
    rects.append(absoluteClippedOverflowRect());
}

void RenderPath::absoluteQuads(Vector<FloatQuad>& quads, bool)
{
    quads.append(absoluteClippedOverflowRect());
}

bool RenderPath::nodeAtPoint(const HitTestRequest&, HitTestResult& result, int _x, int _y, int, int, HitTestAction hitTestAction)
{
    // We only draw in the forground phase, so we only hit-test then.
    if (hitTestAction != HitTestForeground)
        return false;
    
    IntPoint absolutePoint(_x, _y);

    PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_PATH_HITTESTING, style()->pointerEvents());

    bool isVisible = (style()->visibility() == VISIBLE);
    if (isVisible || !hitRules.requireVisible) {
        FloatPoint hitPoint = mapAbsolutePointToLocal(absolutePoint);
        if ((hitRules.canHitStroke && (style()->svgStyle()->hasStroke() || !hitRules.requireStroke) && strokeContains(hitPoint, hitRules.requireStroke))
            || (hitRules.canHitFill && (style()->svgStyle()->hasFill() || !hitRules.requireFill) && fillContains(hitPoint, hitRules.requireFill))) {
            updateHitTestResult(result, absolutePoint);
            return true;
        }
    }

    return false;
}

enum MarkerType {
    Start,
    Mid,
    End
};

struct MarkerData {
    FloatPoint origin;
    FloatPoint subpathStart;
    double strokeWidth;
    FloatPoint inslopePoints[2];
    FloatPoint outslopePoints[2];
    MarkerType type;
    SVGResourceMarker* marker;
};

struct DrawMarkersData {
    DrawMarkersData(GraphicsContext*, SVGResourceMarker* startMarker, SVGResourceMarker* midMarker, double strokeWidth);
    GraphicsContext* context;
    int elementIndex;
    MarkerData previousMarkerData;
    SVGResourceMarker* midMarker;
};

DrawMarkersData::DrawMarkersData(GraphicsContext* c, SVGResourceMarker *start, SVGResourceMarker *mid, double strokeWidth)
    : context(c)
    , elementIndex(0)
    , midMarker(mid)
{
    previousMarkerData.origin = FloatPoint();
    previousMarkerData.subpathStart = FloatPoint();
    previousMarkerData.strokeWidth = strokeWidth;
    previousMarkerData.marker = start;
    previousMarkerData.type = Start;
}

static void drawMarkerWithData(GraphicsContext* context, MarkerData &data)
{
    if (!data.marker)
        return;

    FloatPoint inslopeChange = data.inslopePoints[1] - FloatSize(data.inslopePoints[0].x(), data.inslopePoints[0].y());
    FloatPoint outslopeChange = data.outslopePoints[1] - FloatSize(data.outslopePoints[0].x(), data.outslopePoints[0].y());

    double inslope = rad2deg(atan2(inslopeChange.y(), inslopeChange.x()));
    double outslope = rad2deg(atan2(outslopeChange.y(), outslopeChange.x()));

    double angle = 0.0;
    switch (data.type) {
        case Start:
            angle = outslope;
            break;
        case Mid:
            angle = (inslope + outslope) / 2;
            break;
        case End:
            angle = inslope;
    }

    data.marker->draw(context, FloatRect(), data.origin.x(), data.origin.y(), data.strokeWidth, angle);
}

static inline void updateMarkerDataForElement(MarkerData& previousMarkerData, const PathElement* element)
{
    FloatPoint* points = element->points;
    
    switch (element->type) {
    case PathElementAddQuadCurveToPoint:
        // TODO
        previousMarkerData.origin = points[1];
        break;
    case PathElementAddCurveToPoint:
        previousMarkerData.inslopePoints[0] = points[1];
        previousMarkerData.inslopePoints[1] = points[2];
        previousMarkerData.origin = points[2];
        break;
    case PathElementMoveToPoint:
        previousMarkerData.subpathStart = points[0];
    case PathElementAddLineToPoint:
        previousMarkerData.inslopePoints[0] = previousMarkerData.origin;
        previousMarkerData.inslopePoints[1] = points[0];
        previousMarkerData.origin = points[0];
        break;
    case PathElementCloseSubpath:
        previousMarkerData.inslopePoints[0] = previousMarkerData.origin;
        previousMarkerData.inslopePoints[1] = points[0];
        previousMarkerData.origin = previousMarkerData.subpathStart;
        previousMarkerData.subpathStart = FloatPoint();
    }
}

static void drawStartAndMidMarkers(void* info, const PathElement* element)
{
    DrawMarkersData& data = *reinterpret_cast<DrawMarkersData*>(info);

    int elementIndex = data.elementIndex;
    MarkerData& previousMarkerData = data.previousMarkerData;

    FloatPoint* points = element->points;

    // First update the outslope for the previous element
    previousMarkerData.outslopePoints[0] = previousMarkerData.origin;
    previousMarkerData.outslopePoints[1] = points[0];

    // Draw the marker for the previous element
    if (elementIndex != 0)
        drawMarkerWithData(data.context, previousMarkerData);

    // Update our marker data for this element
    updateMarkerDataForElement(previousMarkerData, element);

    if (elementIndex == 1) {
        // After drawing the start marker, switch to drawing mid markers
        previousMarkerData.marker = data.midMarker;
        previousMarkerData.type = Mid;
    }

    data.elementIndex++;
}

FloatRect RenderPath::drawMarkersIfNeeded(GraphicsContext* context, const FloatRect&, const Path& path) const
{
    Document* doc = document();

    SVGElement* svgElement = static_cast<SVGElement*>(node());
    ASSERT(svgElement && svgElement->document() && svgElement->isStyled());

    SVGStyledElement* styledElement = static_cast<SVGStyledElement*>(svgElement);
    const SVGRenderStyle* svgStyle = style()->svgStyle();

    AtomicString startMarkerId(svgStyle->startMarker());
    AtomicString midMarkerId(svgStyle->midMarker());
    AtomicString endMarkerId(svgStyle->endMarker());

    SVGResourceMarker* startMarker = getMarkerById(doc, startMarkerId);
    SVGResourceMarker* midMarker = getMarkerById(doc, midMarkerId);
    SVGResourceMarker* endMarker = getMarkerById(doc, endMarkerId);

    if (!startMarker && !startMarkerId.isEmpty())
        svgElement->document()->accessSVGExtensions()->addPendingResource(startMarkerId, styledElement);
    else if (startMarker)
        startMarker->addClient(styledElement);

    if (!midMarker && !midMarkerId.isEmpty())
        svgElement->document()->accessSVGExtensions()->addPendingResource(midMarkerId, styledElement);
    else if (midMarker)
        midMarker->addClient(styledElement);

    if (!endMarker && !endMarkerId.isEmpty())
        svgElement->document()->accessSVGExtensions()->addPendingResource(endMarkerId, styledElement);
    else if (endMarker)
        endMarker->addClient(styledElement);

    if (!startMarker && !midMarker && !endMarker)
        return FloatRect();

    double strokeWidth = SVGRenderStyle::cssPrimitiveToLength(this, svgStyle->strokeWidth(), 1.0f);
    DrawMarkersData data(context, startMarker, midMarker, strokeWidth);

    path.apply(&data, drawStartAndMidMarkers);

    data.previousMarkerData.marker = endMarker;
    data.previousMarkerData.type = End;
    drawMarkerWithData(context, data.previousMarkerData);

    // We know the marker boundaries, only after they're drawn!
    // Otherwhise we'd need to do all the marker calculation twice
    // once here (through paint()) and once in absoluteClippedOverflowRect().
    FloatRect bounds;

    if (startMarker)
        bounds.unite(startMarker->cachedBounds());

    if (midMarker)
        bounds.unite(midMarker->cachedBounds());

    if (endMarker)
        bounds.unite(endMarker->cachedBounds());

    return bounds;
}

IntRect RenderPath::outlineBoundsForRepaint(RenderBoxModelObject* /*repaintContainer*/) const
{
    // FIXME: handle non-root repaintContainer
    IntRect result = m_absoluteBounds;
    adjustRectForOutlineAndShadow(result);
    return result;
}

}

#endif // ENABLE(SVG)