/*
Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
2004, 2005, 2008 Rob Buis <buis@kde.org>
2005, 2007 Eric Seidel <eric@webkit.org>
2009 Google, Inc.
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
aint 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 "RenderPath.h"
#include "FloatPoint.h"
#include "FloatQuad.h"
#include "GraphicsContext.h"
#include "PointerEventsHitRules.h"
#include "RenderSVGContainer.h"
#include "StrokeStyleApplier.h"
#include "SVGPaintServer.h"
#include "SVGRenderSupport.h"
#include "SVGResourceFilter.h"
#include "SVGResourceMarker.h"
#include "SVGResourceMasker.h"
#include "SVGStyledTransformableElement.h"
#include "SVGTransformList.h"
#include "SVGURIReference.h"
#include <wtf/MathExtras.h>
namespace WebCore {
class BoundingRectStrokeStyleApplier : public StrokeStyleApplier {
public:
BoundingRectStrokeStyleApplier(const RenderObject* object, RenderStyle* style)
: m_object(object)
, m_style(style)
{
ASSERT(style);
ASSERT(object);
}
void strokeStyle(GraphicsContext* gc)
{
applyStrokeStyleToContext(gc, m_style, m_object);
}
private:
const RenderObject* m_object;
RenderStyle* m_style;
};
RenderPath::RenderPath(SVGStyledTransformableElement* node)
: RenderSVGModelObject(node)
{
}
const AffineTransform& RenderPath::localToParentTransform() const
{
return m_localTransform;
}
AffineTransform RenderPath::localTransform() const
{
return m_localTransform;
}
bool RenderPath::fillContains(const FloatPoint& point, bool requiresFill) const
{
if (m_path.isEmpty())
return false;
if (requiresFill && !SVGPaintServer::fillPaintServer(style(), this))
return false;
return m_path.contains(point, style()->svgStyle()->fillRule());
}
bool RenderPath::strokeContains(const FloatPoint& point, bool requiresStroke) const
{
if (m_path.isEmpty())
return false;
if (requiresStroke && !SVGPaintServer::strokePaintServer(style(), this))
return false;
BoundingRectStrokeStyleApplier strokeStyle(this, style());
return m_path.strokeContains(&strokeStyle, point);
}
FloatRect RenderPath::objectBoundingBox() const
{
if (m_path.isEmpty())
return FloatRect();
if (m_cachedLocalFillBBox.isEmpty())
m_cachedLocalFillBBox = m_path.boundingRect();
return m_cachedLocalFillBBox;
}
FloatRect RenderPath::strokeBoundingBox() const
{
if (m_path.isEmpty())
return FloatRect();
if (!m_cachedLocalStrokeBBox.isEmpty())
return m_cachedLocalStrokeBBox;
m_cachedLocalStrokeBBox = objectBoundingBox();
if (style()->svgStyle()->hasStroke()) {
BoundingRectStrokeStyleApplier strokeStyle(this, style());
m_cachedLocalStrokeBBox.unite(m_path.strokeBoundingRect(&strokeStyle));
}
return m_cachedLocalStrokeBBox;
}
FloatRect RenderPath::markerBoundingBox() const
{
if (m_path.isEmpty())
return FloatRect();
if (m_cachedLocalMarkerBBox.isEmpty())
calculateMarkerBoundsIfNeeded();
return m_cachedLocalMarkerBBox;
}
FloatRect RenderPath::repaintRectInLocalCoordinates() const
{
if (m_path.isEmpty())
return FloatRect();
// If we already have a cached repaint rect, return that
if (!m_cachedLocalRepaintRect.isEmpty())
return m_cachedLocalRepaintRect;
// FIXME: We need to be careful here. We assume that there is no filter,
// clipper, marker or masker if the rects are empty.
FloatRect rect = filterBoundingBoxForRenderer(this);
if (!rect.isEmpty())
m_cachedLocalRepaintRect = rect;
else {
m_cachedLocalRepaintRect = strokeBoundingBox();
m_cachedLocalRepaintRect.unite(markerBoundingBox());
}
rect = clipperBoundingBoxForRenderer(this);
if (!rect.isEmpty())
m_cachedLocalRepaintRect.intersect(rect);
rect = maskerBoundingBoxForRenderer(this);
if (!rect.isEmpty())
m_cachedLocalRepaintRect.intersect(rect);
style()->svgStyle()->inflateForShadow(m_cachedLocalRepaintRect);
return m_cachedLocalRepaintRect;
}
void RenderPath::setPath(const Path& newPath)
{
m_path = newPath;
m_cachedLocalRepaintRect = FloatRect();
m_cachedLocalStrokeBBox = FloatRect();
m_cachedLocalFillBBox = FloatRect();
m_cachedLocalMarkerBBox = FloatRect();
}
void RenderPath::layout()
{
LayoutRepainter repainter(*this, checkForRepaintDuringLayout() && selfNeedsLayout());
SVGStyledTransformableElement* element = static_cast<SVGStyledTransformableElement*>(node());
m_localTransform = element->animatedLocalTransform();
setPath(element->toPathData());
repainter.repaintAfterLayout();
setNeedsLayout(false);
}
static inline void fillAndStrokePath(const Path& path, GraphicsContext* context, RenderStyle* style, RenderPath* object)
{
context->beginPath();
SVGPaintServer* fillPaintServer = SVGPaintServer::fillPaintServer(style, object);
if (fillPaintServer) {
context->addPath(path);
fillPaintServer->draw(context, object, ApplyToFillTargetType);
}
SVGPaintServer* strokePaintServer = SVGPaintServer::strokePaintServer(style, object);
if (strokePaintServer) {
context->addPath(path); // path is cleared when filled.
strokePaintServer->draw(context, object, ApplyToStrokeTargetType);
}
}
void RenderPath::paint(PaintInfo& paintInfo, int, int)
{
if (paintInfo.context->paintingDisabled() || style()->visibility() == HIDDEN || m_path.isEmpty())
return;
FloatRect boundingBox = repaintRectInLocalCoordinates();
FloatRect nonLocalBoundingBox = m_localTransform.mapRect(boundingBox);
// FIXME: The empty rect check is to deal with incorrect initial clip in renderSubtreeToImage
// unfortunately fixing that problem is fairly complex unless we were willing to just futz the
// rect to something "close enough"
if (!nonLocalBoundingBox.intersects(paintInfo.rect) && !paintInfo.rect.isEmpty())
return;
PaintInfo childPaintInfo(paintInfo);
childPaintInfo.context->save();
applyTransformToPaintInfo(childPaintInfo, m_localTransform);
SVGResourceFilter* filter = 0;
if (childPaintInfo.phase == PaintPhaseForeground) {
PaintInfo savedInfo(childPaintInfo);
if (prepareToRenderSVGContent(this, childPaintInfo, boundingBox, filter)) {
if (style()->svgStyle()->shapeRendering() == SR_CRISPEDGES)
childPaintInfo.context->setShouldAntialias(false);
fillAndStrokePath(m_path, childPaintInfo.context, style(), this);
if (static_cast<SVGStyledElement*>(node())->supportsMarkers())
m_markerLayoutInfo.drawMarkers(childPaintInfo);
}
finishRenderSVGContent(this, childPaintInfo, filter, savedInfo.context);
}
if ((childPaintInfo.phase == PaintPhaseOutline || childPaintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth())
paintOutline(childPaintInfo.context, static_cast<int>(boundingBox.x()), static_cast<int>(boundingBox.y()),
static_cast<int>(boundingBox.width()), static_cast<int>(boundingBox.height()), style());
childPaintInfo.context->restore();
}
// This method is called from inside paintOutline() since we call paintOutline()
// while transformed to our coord system, return local coords
void RenderPath::addFocusRingRects(Vector<IntRect>& rects, int, int)
{
IntRect rect = enclosingIntRect(repaintRectInLocalCoordinates());
if (!rect.isEmpty())
rects.append(rect);
}
bool RenderPath::nodeAtFloatPoint(const HitTestRequest&, 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;
FloatPoint localPoint = m_localTransform.inverse().mapPoint(pointInParent);
PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_PATH_HITTESTING, style()->pointerEvents());
bool isVisible = (style()->visibility() == VISIBLE);
if (isVisible || !hitRules.requireVisible) {
if ((hitRules.canHitStroke && (style()->svgStyle()->hasStroke() || !hitRules.requireStroke) && strokeContains(localPoint, hitRules.requireStroke))
|| (hitRules.canHitFill && (style()->svgStyle()->hasFill() || !hitRules.requireFill) && fillContains(localPoint, hitRules.requireFill))) {
updateHitTestResult(result, roundedIntPoint(localPoint));
return true;
}
}
return false;
}
void RenderPath::calculateMarkerBoundsIfNeeded() const
{
Document* doc = document();
SVGElement* svgElement = static_cast<SVGElement*>(node());
ASSERT(svgElement && svgElement->document());
if (!svgElement->isStyled())
return;
SVGStyledElement* styledElement = static_cast<SVGStyledElement*>(svgElement);
if (!styledElement->supportsMarkers())
return;
const SVGRenderStyle* svgStyle = style()->svgStyle();
AtomicString startMarkerId(svgStyle->startMarker());
AtomicString midMarkerId(svgStyle->midMarker());
AtomicString endMarkerId(svgStyle->endMarker());
SVGResourceMarker* startMarker = getMarkerById(doc, startMarkerId, this);
SVGResourceMarker* midMarker = getMarkerById(doc, midMarkerId, this);
SVGResourceMarker* endMarker = getMarkerById(doc, endMarkerId, this);
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;
float strokeWidth = SVGRenderStyle::cssPrimitiveToLength(this, svgStyle->strokeWidth(), 1.0f);
m_cachedLocalMarkerBBox = m_markerLayoutInfo.calculateBoundaries(startMarker, midMarker, endMarker, strokeWidth, m_path);
}
}
#endif // ENABLE(SVG)