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/*
* Copyright (C) 2006 Apple Computer, Inc.
* Copyright (C) 2009 Google, Inc.
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
*
* 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 "RenderSVGForeignObject.h"
#include "GraphicsContext.h"
#include "HitTestResult.h"
#include "LayoutRepainter.h"
#include "RenderObject.h"
#include "RenderSVGResource.h"
#include "RenderView.h"
#include "SVGForeignObjectElement.h"
#include "SVGRenderingContext.h"
#include "SVGResourcesCache.h"
#include "SVGSVGElement.h"
#include "TransformState.h"
#include <wtf/StackStats.h>
namespace WebCore {
RenderSVGForeignObject::RenderSVGForeignObject(SVGForeignObjectElement* node)
: RenderSVGBlock(node)
, m_needsTransformUpdate(true)
{
}
RenderSVGForeignObject::~RenderSVGForeignObject()
{
}
void RenderSVGForeignObject::paint(PaintInfo& paintInfo, const LayoutPoint&)
{
if (paintInfo.context->paintingDisabled()
|| (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection))
return;
PaintInfo childPaintInfo(paintInfo);
GraphicsContextStateSaver stateSaver(*childPaintInfo.context);
childPaintInfo.applyTransform(localTransform());
if (SVGRenderSupport::isOverflowHidden(this))
childPaintInfo.context->clip(m_viewport);
SVGRenderingContext renderingContext;
bool continueRendering = true;
if (paintInfo.phase == PaintPhaseForeground) {
renderingContext.prepareToRenderSVGContent(this, childPaintInfo);
continueRendering = renderingContext.isRenderingPrepared();
}
if (continueRendering) {
// Paint all phases of FO elements atomically, as though the FO element established its
// own stacking context.
bool preservePhase = paintInfo.phase == PaintPhaseSelection || paintInfo.phase == PaintPhaseTextClip;
LayoutPoint childPoint = IntPoint();
childPaintInfo.phase = preservePhase ? paintInfo.phase : PaintPhaseBlockBackground;
RenderBlock::paint(childPaintInfo, IntPoint());
if (!preservePhase) {
childPaintInfo.phase = PaintPhaseChildBlockBackgrounds;
RenderBlock::paint(childPaintInfo, childPoint);
childPaintInfo.phase = PaintPhaseFloat;
RenderBlock::paint(childPaintInfo, childPoint);
childPaintInfo.phase = PaintPhaseForeground;
RenderBlock::paint(childPaintInfo, childPoint);
childPaintInfo.phase = PaintPhaseOutline;
RenderBlock::paint(childPaintInfo, childPoint);
}
}
}
LayoutRect RenderSVGForeignObject::clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const
{
return SVGRenderSupport::clippedOverflowRectForRepaint(this, repaintContainer);
}
void RenderSVGForeignObject::computeFloatRectForRepaint(const RenderLayerModelObject* repaintContainer, FloatRect& repaintRect, bool fixed) const
{
SVGRenderSupport::computeFloatRectForRepaint(this, repaintContainer, repaintRect, fixed);
}
const AffineTransform& RenderSVGForeignObject::localToParentTransform() const
{
m_localToParentTransform = localTransform();
m_localToParentTransform.translate(m_viewport.x(), m_viewport.y());
return m_localToParentTransform;
}
void RenderSVGForeignObject::updateLogicalWidth()
{
// FIXME: Investigate in size rounding issues
// FIXME: Remove unnecessary rounding when layout is off ints: webkit.org/b/63656
setWidth(static_cast<int>(roundf(m_viewport.width())));
}
void RenderSVGForeignObject::computeLogicalHeight(LayoutUnit, LayoutUnit logicalTop, LogicalExtentComputedValues& computedValues) const
{
// FIXME: Investigate in size rounding issues
// FIXME: Remove unnecessary rounding when layout is off ints: webkit.org/b/63656
// FIXME: Is this correct for vertical writing mode?
computedValues.m_extent = static_cast<int>(roundf(m_viewport.height()));
computedValues.m_position = logicalTop;
}
void RenderSVGForeignObject::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
ASSERT(needsLayout());
ASSERT(!view()->layoutStateEnabled()); // RenderSVGRoot disables layoutState for the SVG rendering tree.
LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this));
SVGForeignObjectElement* foreign = static_cast<SVGForeignObjectElement*>(node());
bool updateCachedBoundariesInParents = false;
if (m_needsTransformUpdate) {
m_localTransform = foreign->animatedLocalTransform();
m_needsTransformUpdate = false;
updateCachedBoundariesInParents = true;
}
FloatRect oldViewport = m_viewport;
// Cache viewport boundaries
SVGLengthContext lengthContext(foreign);
FloatPoint viewportLocation(foreign->x().value(lengthContext), foreign->y().value(lengthContext));
m_viewport = FloatRect(viewportLocation, FloatSize(foreign->width().value(lengthContext), foreign->height().value(lengthContext)));
if (!updateCachedBoundariesInParents)
updateCachedBoundariesInParents = oldViewport != m_viewport;
// Set box origin to the foreignObject x/y translation, so positioned objects in XHTML content get correct
// positions. A regular RenderBoxModelObject would pull this information from RenderStyle - in SVG those
// properties are ignored for non <svg> elements, so we mimic what happens when specifying them through CSS.
// FIXME: Investigate in location rounding issues - only affects RenderSVGForeignObject & RenderSVGText
setLocation(roundedIntPoint(viewportLocation));
bool layoutChanged = everHadLayout() && selfNeedsLayout();
RenderBlock::layout();
ASSERT(!needsLayout());
// If our bounds changed, notify the parents.
if (updateCachedBoundariesInParents)
RenderSVGBlock::setNeedsBoundariesUpdate();
// Invalidate all resources of this client if our layout changed.
if (layoutChanged)
SVGResourcesCache::clientLayoutChanged(this);
repainter.repaintAfterLayout();
}
bool RenderSVGForeignObject::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
{
// Embedded content is drawn in the foreground phase.
if (hitTestAction != HitTestForeground)
return false;
FloatPoint localPoint = localTransform().inverse().mapPoint(pointInParent);
// Early exit if local point is not contained in clipped viewport area
if (SVGRenderSupport::isOverflowHidden(this) && !m_viewport.contains(localPoint))
return false;
// FOs establish a stacking context, so we need to hit-test all layers.
HitTestLocation hitTestLocation(roundedLayoutPoint(localPoint));
return RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestForeground)
|| RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestFloat)
|| RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestChildBlockBackgrounds);
}
bool RenderSVGForeignObject::nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation&, const LayoutPoint&, HitTestAction)
{
ASSERT_NOT_REACHED();
return false;
}
void RenderSVGForeignObject::mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState& transformState, MapCoordinatesFlags, bool* wasFixed) const
{
SVGRenderSupport::mapLocalToContainer(this, repaintContainer, transformState, wasFixed);
}
const RenderObject* RenderSVGForeignObject::pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap& geometryMap) const
{
return SVGRenderSupport::pushMappingToContainer(this, ancestorToStopAt, geometryMap);
}
}
#endif
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