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/*
* Copyright (C) 2006 Apple 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"
#include "LegacyRenderSVGForeignObject.h"
#include "GraphicsContext.h"
#include "HitTestResult.h"
#include "LayoutRepainter.h"
#include "LegacyRenderSVGResource.h"
#include "RenderBoxModelObjectInlines.h"
#include "RenderSVGBlockInlines.h"
#include "RenderView.h"
#include "SVGElementTypeHelpers.h"
#include "SVGForeignObjectElement.h"
#include "SVGRenderSupport.h"
#include "SVGRenderingContext.h"
#include "SVGResourcesCache.h"
#include "TransformState.h"
#include <wtf/StackStats.h>
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(LegacyRenderSVGForeignObject);
LegacyRenderSVGForeignObject::LegacyRenderSVGForeignObject(SVGForeignObjectElement& element, RenderStyle&& style)
: RenderSVGBlock(Type::LegacySVGForeignObject, element, WTFMove(style))
{
ASSERT(isLegacyRenderSVGForeignObject());
}
LegacyRenderSVGForeignObject::~LegacyRenderSVGForeignObject() = default;
SVGForeignObjectElement& LegacyRenderSVGForeignObject::foreignObjectElement() const
{
return downcast<SVGForeignObjectElement>(RenderSVGBlock::graphicsElement());
}
void LegacyRenderSVGForeignObject::paint(PaintInfo& paintInfo, const LayoutPoint&)
{
if (paintInfo.context().paintingDisabled())
return;
if (paintInfo.phase != PaintPhase::Foreground && paintInfo.phase != PaintPhase::Selection)
return;
PaintInfo childPaintInfo(paintInfo);
GraphicsContextStateSaver stateSaver(childPaintInfo.context());
childPaintInfo.applyTransform(localTransform());
if (SVGRenderSupport::isOverflowHidden(*this))
childPaintInfo.context().clip(m_viewport);
SVGRenderingContext renderingContext;
if (paintInfo.phase == PaintPhase::Foreground) {
renderingContext.prepareToRenderSVGContent(*this, childPaintInfo);
if (!renderingContext.isRenderingPrepared())
return;
}
LayoutPoint childPoint = IntPoint();
if (paintInfo.phase == PaintPhase::Selection) {
RenderBlock::paint(childPaintInfo, childPoint);
return;
}
// Paint all phases of FO elements atomically, as though the FO element established its
// own stacking context.
childPaintInfo.phase = PaintPhase::BlockBackground;
RenderBlock::paint(childPaintInfo, childPoint);
childPaintInfo.phase = PaintPhase::ChildBlockBackgrounds;
RenderBlock::paint(childPaintInfo, childPoint);
childPaintInfo.phase = PaintPhase::Float;
RenderBlock::paint(childPaintInfo, childPoint);
childPaintInfo.phase = PaintPhase::Foreground;
RenderBlock::paint(childPaintInfo, childPoint);
childPaintInfo.phase = PaintPhase::Outline;
RenderBlock::paint(childPaintInfo, childPoint);
}
const AffineTransform& LegacyRenderSVGForeignObject::localToParentTransform() const
{
m_localToParentTransform = localTransform();
m_localToParentTransform.translate(m_viewport.location());
return m_localToParentTransform;
}
void LegacyRenderSVGForeignObject::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())));
}
RenderBox::LogicalExtentComputedValues LegacyRenderSVGForeignObject::computeLogicalHeight(LayoutUnit, LayoutUnit logicalTop) 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?
return { static_cast<int>(roundf(m_viewport.height())), logicalTop, ComputedMarginValues() };
}
void LegacyRenderSVGForeignObject::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
ASSERT(needsLayout());
ASSERT(!view().frameView().layoutContext().isPaintOffsetCacheEnabled()); // LegacyRenderSVGRoot disables paint offset cache for the SVG rendering tree.
LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(*this));
bool updateCachedBoundariesInParents = false;
if (m_needsTransformUpdate) {
m_localTransform = foreignObjectElement().animatedLocalTransform();
m_needsTransformUpdate = false;
updateCachedBoundariesInParents = true;
}
FloatRect oldViewport = m_viewport;
// Cache viewport boundaries
Ref foreignObjectElement = this->foreignObjectElement();
SVGLengthContext lengthContext(foreignObjectElement.ptr());
FloatPoint viewportLocation(foreignObjectElement->x().value(lengthContext), foreignObjectElement->y().value(lengthContext));
m_viewport = FloatRect(viewportLocation, FloatSize(foreignObjectElement->width().value(lengthContext), foreignObjectElement->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 LegacyRenderSVGForeignObject & RenderSVGText
setLocation(roundedIntPoint(viewportLocation));
bool layoutChanged = everHadLayout() && selfNeedsLayout();
RenderBlock::layout();
ASSERT(!needsLayout());
// If our bounds changed, notify the parents.
if (updateCachedBoundariesInParents) {
if (CheckedPtr parent = this->parent())
parent->invalidateCachedBoundaries();
}
// Invalidate all resources of this client if our layout changed.
if (layoutChanged)
SVGResourcesCache::clientLayoutChanged(*this);
repainter.repaintAfterLayout();
}
bool LegacyRenderSVGForeignObject::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 = valueOrDefault(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(flooredLayoutPoint(localPoint));
return RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestForeground)
|| RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestFloat)
|| RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestChildBlockBackgrounds);
}
LayoutSize LegacyRenderSVGForeignObject::offsetFromContainer(RenderElement& container, const LayoutPoint&, bool*) const
{
ASSERT_UNUSED(container, &container == this->container());
ASSERT(!isInFlowPositioned());
ASSERT(!isAbsolutelyPositioned());
ASSERT(!isInline());
return locationOffset();
}
}
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