198 lines
6.4 KiB
C++
198 lines
6.4 KiB
C++
/*
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* Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
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* Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
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* Copyright (C) 2018 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "SVGGraphicsElement.h"
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#include "RenderSVGPath.h"
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#include "RenderSVGResource.h"
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#include "SVGMatrix.h"
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#include "SVGNames.h"
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#include "SVGPathData.h"
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#include "SVGRect.h"
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#include "SVGSVGElement.h"
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#include "SVGStringList.h"
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#include <wtf/IsoMallocInlines.h>
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#include <wtf/NeverDestroyed.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(SVGGraphicsElement);
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SVGGraphicsElement::SVGGraphicsElement(const QualifiedName& tagName, Document& document)
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: SVGElement(tagName, document)
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, SVGTests(this)
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, m_shouldIsolateBlending(false)
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{
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static std::once_flag onceFlag;
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std::call_once(onceFlag, [] {
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PropertyRegistry::registerProperty<SVGNames::transformAttr, &SVGGraphicsElement::m_transform>();
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});
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}
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SVGGraphicsElement::~SVGGraphicsElement() = default;
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Ref<SVGMatrix> SVGGraphicsElement::getCTMForBindings()
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{
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return SVGMatrix::create(getCTM());
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}
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AffineTransform SVGGraphicsElement::getCTM(StyleUpdateStrategy styleUpdateStrategy)
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{
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return SVGLocatable::computeCTM(this, SVGLocatable::NearestViewportScope, styleUpdateStrategy);
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}
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Ref<SVGMatrix> SVGGraphicsElement::getScreenCTMForBindings()
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{
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return SVGMatrix::create(getScreenCTM());
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}
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AffineTransform SVGGraphicsElement::getScreenCTM(StyleUpdateStrategy styleUpdateStrategy)
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{
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return SVGLocatable::computeCTM(this, SVGLocatable::ScreenScope, styleUpdateStrategy);
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}
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AffineTransform SVGGraphicsElement::animatedLocalTransform() const
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{
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AffineTransform matrix;
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auto* style = renderer() ? &renderer()->style() : nullptr;
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bool hasSpecifiedTransform = style && style->hasTransform();
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// Honor any of the transform-related CSS properties if set.
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if (hasSpecifiedTransform || (style && (style->translate() || style->scale() || style->rotate()))) {
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FloatRect boundingBox;
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switch (style->transformBox()) {
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case TransformBox::BorderBox:
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// For SVG elements without an associated CSS layout box, the used value for border-box is stroke-box.
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case TransformBox::StrokeBox:
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boundingBox = renderer()->strokeBoundingBox();
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break;
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case TransformBox::ContentBox:
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// For SVG elements without an associated CSS layout box, the used value for content-box is fill-box.
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case TransformBox::FillBox:
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boundingBox = renderer()->objectBoundingBox();
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break;
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case TransformBox::ViewBox: {
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FloatSize viewportSize;
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SVGLengthContext(this).determineViewport(viewportSize);
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boundingBox.setSize(viewportSize);
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break;
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}
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}
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// Note: objectBoundingBox is an emptyRect for elements like pattern or clipPath.
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// See the "Object bounding box units" section of http://dev.w3.org/csswg/css3-transforms/
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TransformationMatrix transform;
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style->applyTransform(transform, boundingBox);
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// Flatten any 3D transform.
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matrix = transform.toAffineTransform();
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// CSS bakes the zoom factor into lengths, including translation components.
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// In order to align CSS & SVG transforms, we need to invert this operation.
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float zoom = style->effectiveZoom();
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if (zoom != 1) {
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matrix.setE(matrix.e() / zoom);
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matrix.setF(matrix.f() / zoom);
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}
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}
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// If we didn't have the CSS "transform" property set, we must account for the "transform" attribute.
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if (!hasSpecifiedTransform)
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matrix *= transform().concatenate();
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if (m_supplementalTransform)
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return *m_supplementalTransform * matrix;
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return matrix;
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}
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AffineTransform* SVGGraphicsElement::supplementalTransform()
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{
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if (!m_supplementalTransform)
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m_supplementalTransform = makeUnique<AffineTransform>();
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return m_supplementalTransform.get();
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}
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void SVGGraphicsElement::parseAttribute(const QualifiedName& name, const AtomString& value)
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{
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if (name == SVGNames::transformAttr) {
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m_transform->baseVal()->parse(value);
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return;
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}
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SVGElement::parseAttribute(name, value);
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SVGTests::parseAttribute(name, value);
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}
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void SVGGraphicsElement::svgAttributeChanged(const QualifiedName& attrName)
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{
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if (attrName == SVGNames::transformAttr) {
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InstanceInvalidationGuard guard(*this);
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if (auto renderer = this->renderer()) {
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renderer->setNeedsTransformUpdate();
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RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer);
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}
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return;
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}
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SVGElement::svgAttributeChanged(attrName);
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SVGTests::svgAttributeChanged(attrName);
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}
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SVGElement* SVGGraphicsElement::nearestViewportElement() const
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{
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return SVGTransformable::nearestViewportElement(this);
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}
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SVGElement* SVGGraphicsElement::farthestViewportElement() const
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{
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return SVGTransformable::farthestViewportElement(this);
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}
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Ref<SVGRect> SVGGraphicsElement::getBBoxForBindings()
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{
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return SVGRect::create(getBBox());
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}
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FloatRect SVGGraphicsElement::getBBox(StyleUpdateStrategy styleUpdateStrategy)
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{
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return SVGTransformable::getBBox(this, styleUpdateStrategy);
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}
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RenderPtr<RenderElement> SVGGraphicsElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
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{
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return createRenderer<RenderSVGPath>(*this, WTFMove(style));
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}
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Path SVGGraphicsElement::toClipPath()
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{
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Path path = pathFromGraphicsElement(this);
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// FIXME: How do we know the element has done a layout?
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path.transform(animatedLocalTransform());
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return path;
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}
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}
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