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/*
* Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Rob Buis <buis@kde.org>
* Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
* Copyright (C) 2022, 2023, 2024 Igalia S.L.
*
* 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 "RenderSVGResourceMarker.h"
#include "Element.h"
#include "ElementIterator.h"
#include "FloatPoint.h"
#include "Image.h"
#include "ImageBuffer.h"
#include "IntRect.h"
#include "RenderLayer.h"
#include "RenderLayerInlines.h"
#include "RenderSVGModelObjectInlines.h"
#include "RenderSVGResourceMarkerInlines.h"
#include "SVGElementTypeHelpers.h"
#include "SVGGraphicsElement.h"
#include "SVGLengthContext.h"
#include "SVGRenderStyle.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(RenderSVGResourceMarker);
RenderSVGResourceMarker::RenderSVGResourceMarker(SVGMarkerElement& element, RenderStyle&& style)
: RenderSVGResourceContainer(Type::SVGResourceMarker, element, WTFMove(style))
{
}
RenderSVGResourceMarker::~RenderSVGResourceMarker() = default;
void RenderSVGResourceMarker::invalidateMarker()
{
// Repainting all clients is sufficient to handle invalidation.
repaintAllClients();
}
FloatRect RenderSVGResourceMarker::computeViewport() const
{
Ref useMarkerElement = markerElement();
SVGLengthContext lengthContext(useMarkerElement.ptr());
return { 0, 0, useMarkerElement->markerWidth().value(lengthContext), useMarkerElement->markerHeight().value(lengthContext) };
}
bool RenderSVGResourceMarker::updateLayoutSizeIfNeeded()
{
auto previousViewportSize = viewportSize();
m_viewport = computeViewport();
return selfNeedsLayout() || previousViewportSize != viewportSize();
}
void RenderSVGResourceMarker::layout()
{
// RenderSVGResourceContainer inherits from RenderSVGHiddenContainer which has a no-op layout() implementation.
// Markers are always painted indirectly, but their children need to be laid out such as they would be regular
// children of a SVG container element, thus skip RenderSVGHiddenContainer::layout() and use RenderSVGContainer::layout().
RenderSVGContainer::layout();
}
void RenderSVGResourceMarker::updateFromStyle()
{
RenderSVGContainer::updateFromStyle();
if (SVGRenderSupport::isOverflowHidden(*this))
setHasNonVisibleOverflow();
}
void RenderSVGResourceMarker::updateLayerTransform()
{
ASSERT(hasLayer());
// First update the supplemental layer transform.
Ref useMarkerElement = markerElement();
auto viewportSize = this->viewportSize();
m_supplementalLayerTransform.makeIdentity();
if (useMarkerElement->hasAttribute(SVGNames::viewBoxAttr)) {
// An empty viewBox disables the rendering -- dirty the visible descendant status!
if (useMarkerElement->hasEmptyViewBox())
layer()->dirtyVisibleContentStatus();
else if (auto viewBoxTransform = useMarkerElement->viewBoxToViewTransform(viewportSize.width(), viewportSize.height()); !viewBoxTransform.isIdentity())
m_supplementalLayerTransform = viewBoxTransform;
}
// After updating the supplemental layer transform we're able to use it in RenderLayerModelObjects::updateLayerTransform().
RenderSVGContainer::updateLayerTransform();
}
void RenderSVGResourceMarker::applyTransform(TransformationMatrix& transform, const RenderStyle& style, const FloatRect& boundingBox, OptionSet<RenderStyle::TransformOperationOption> options) const
{
// This code resembles RenderLayerModelObject::applySVGTransform(), but supporting non-SVGGraphicsElement derived elements,
// such as SVGMarkerElement, that do not allow user-specified transformations (no SMIL, no SVG/CSS transformations) - only
// the marker-induced transformations when applying markers to path elements.
FloatPoint3D originTranslate;
if (options.contains(RenderStyle::TransformOperationOption::TransformOrigin) && !m_supplementalLayerTransform.isIdentityOrTranslation())
originTranslate = style.computeTransformOrigin(boundingBox);
style.applyTransformOrigin(transform, originTranslate);
transform.multiplyAffineTransform(m_supplementalLayerTransform);
style.unapplyTransformOrigin(transform, originTranslate);
}
LayoutRect RenderSVGResourceMarker::overflowClipRect(const LayoutPoint& location, OverlayScrollbarSizeRelevancy, PaintPhase) const
{
Ref useMarkerElement = markerElement();
auto clipRect = enclosingLayoutRect(viewport());
if (useMarkerElement->hasAttribute(SVGNames::viewBoxAttr)) {
if (useMarkerElement->hasEmptyViewBox())
return { };
if (!m_supplementalLayerTransform.isIdentity())
clipRect = enclosingLayoutRect(m_supplementalLayerTransform.inverse().value_or(AffineTransform { }).mapRect(viewport()));
}
clipRect.moveBy(location);
return clipRect;
}
AffineTransform RenderSVGResourceMarker::markerTransformation(const FloatPoint& origin, float autoAngle, float strokeWidth) const
{
AffineTransform transform;
transform.translate(origin);
transform.rotate(angle().value_or(autoAngle));
// The 'referencePoint()' coordinate maps to SVGs refX/refY, given in coordinates relative to the viewport established by the marker
auto mappedOrigin = m_supplementalLayerTransform.mapPoint(referencePoint());
if (markerUnits() == SVGMarkerUnitsStrokeWidth)
transform.scaleNonUniform(strokeWidth, strokeWidth);
transform.translate(-mappedOrigin);
return transform;
}
FloatRect RenderSVGResourceMarker::computeMarkerBoundingBox(const SVGBoundingBoxComputation::DecorationOptions& options, const AffineTransform& markerTransformation) const
{
SVGBoundingBoxComputation boundingBoxComputation(*this);
auto boundingBox = boundingBoxComputation.computeDecoratedBoundingBox(options);
// Map repaint rect into parent coordinate space, in which the marker boundaries have to be evaluated
return markerTransformation.mapRect(m_supplementalLayerTransform.mapRect(boundingBox));
}
}
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