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/*
* Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
* Copyright (C) 2009 Google, Inc. All rights reserved.
* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
* Copyright (C) 2020, 2021, 2022 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 "RenderSVGContainer.h"
#include "GraphicsContext.h"
#include "HitTestRequest.h"
#include "HitTestResult.h"
#include "LayoutRepainter.h"
#include "RenderIterator.h"
#include "RenderLayer.h"
#include "RenderTreeBuilder.h"
#include "RenderView.h"
#include "SVGContainerLayout.h"
#include "SVGLayerTransformUpdater.h"
#include "SVGVisitedRendererTracking.h"
#include <wtf/SetForScope.h>
#include <wtf/StackStats.h>
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(RenderSVGContainer);
RenderSVGContainer::RenderSVGContainer(Type type, Document& document, RenderStyle&& style, OptionSet<SVGModelObjectFlag> svgFlags)
: RenderSVGModelObject(type, document, WTFMove(style), svgFlags | SVGModelObjectFlag::IsContainer)
{
}
RenderSVGContainer::RenderSVGContainer(Type type, SVGElement& element, RenderStyle&& style, OptionSet<SVGModelObjectFlag> svgFlags)
: RenderSVGModelObject(type, element, WTFMove(style), svgFlags | SVGModelObjectFlag::IsContainer)
{
}
RenderSVGContainer::~RenderSVGContainer() = default;
void RenderSVGContainer::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
ASSERT(needsLayout());
auto checkForRepaintOverride = isRenderSVGResourceMarker() ? std::make_optional(LayoutRepainter::CheckForRepaint::No) : std::nullopt;
LayoutRepainter repainter(*this, checkForRepaintOverride);
// Update layer transform before laying out children (SVG needs access to the transform matrices during layout for on-screen text font-size calculations).
// Eventually re-update if the transform reference box, relevant for transform-origin, has changed during layout.
//
// FIXME: LBSE should not repeat the same mistake -- remove the on-screen text font-size hacks that predate the modern solutions to this.
{
ASSERT(!m_isLayoutSizeChanged);
SetForScope trackLayoutSizeChanges(m_isLayoutSizeChanged, updateLayoutSizeIfNeeded());
ASSERT(!m_didTransformToRootUpdate);
SVGLayerTransformUpdater transformUpdater(*this);
SetForScope trackTransformChanges(m_didTransformToRootUpdate, transformUpdater.layerTransformChanged() || SVGContainerLayout::transformToRootChanged(parent()));
layoutChildren();
}
repainter.repaintAfterLayout();
clearNeedsLayout();
}
void RenderSVGContainer::layoutChildren()
{
SVGContainerLayout containerLayout(*this);
containerLayout.layoutChildren(selfNeedsLayout());
SVGBoundingBoxComputation boundingBoxComputation(*this);
m_objectBoundingBox = boundingBoxComputation.computeDecoratedBoundingBox(SVGBoundingBoxComputation::objectBoundingBoxDecoration, &m_objectBoundingBoxValid);
m_strokeBoundingBox = std::nullopt;
if (auto objectBoundingBoxWithoutTransformations = overridenObjectBoundingBoxWithoutTransformations())
m_objectBoundingBoxWithoutTransformations = objectBoundingBoxWithoutTransformations.value();
else {
constexpr auto objectBoundingBoxDecorationWithoutTransformations = SVGBoundingBoxComputation::objectBoundingBoxDecoration | SVGBoundingBoxComputation::DecorationOption::IgnoreTransformations;
m_objectBoundingBoxWithoutTransformations = boundingBoxComputation.computeDecoratedBoundingBox(objectBoundingBoxDecorationWithoutTransformations);
}
setCurrentSVGLayoutRect(enclosingLayoutRect(m_objectBoundingBoxWithoutTransformations));
containerLayout.positionChildrenRelativeToContainer();
}
FloatRect RenderSVGContainer::strokeBoundingBox() const
{
if (!m_strokeBoundingBox) {
// Initialize m_strokeBoundingBox before calling computeDecoratedBoundingBox, since recursively referenced markers can cause us to re-enter here.
m_strokeBoundingBox = FloatRect { };
SVGBoundingBoxComputation boundingBoxComputation(*this);
m_strokeBoundingBox = boundingBoxComputation.computeDecoratedBoundingBox(SVGBoundingBoxComputation::strokeBoundingBoxDecoration);
}
return *m_strokeBoundingBox;
}
void RenderSVGContainer::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
OptionSet<PaintPhase> relevantPaintPhases { PaintPhase::Foreground, PaintPhase::ClippingMask, PaintPhase::Mask, PaintPhase::Outline, PaintPhase::SelfOutline };
if (!shouldPaintSVGRenderer(paintInfo, relevantPaintPhases))
return;
if (paintInfo.phase == PaintPhase::ClippingMask) {
paintSVGClippingMask(paintInfo, objectBoundingBox());
return;
}
auto adjustedPaintOffset = paintOffset + currentSVGLayoutLocation();
if (paintInfo.phase == PaintPhase::Mask) {
paintSVGMask(paintInfo, adjustedPaintOffset);
return;
}
auto visualOverflowRect = visualOverflowRectEquivalent();
visualOverflowRect.moveBy(adjustedPaintOffset);
if (!visualOverflowRect.intersects(paintInfo.rect))
return;
if (paintInfo.phase == PaintPhase::Outline || paintInfo.phase == PaintPhase::SelfOutline) {
paintSVGOutline(paintInfo, adjustedPaintOffset);
return;
}
ASSERT(paintInfo.phase == PaintPhase::Foreground);
}
bool RenderSVGContainer::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction)
{
auto adjustedLocation = accumulatedOffset + currentSVGLayoutLocation();
auto visualOverflowRect = visualOverflowRectEquivalent();
visualOverflowRect.moveBy(adjustedLocation);
if (!locationInContainer.intersects(visualOverflowRect))
return false;
static NeverDestroyed<SVGVisitedRendererTracking::VisitedSet> s_visitedSet;
SVGVisitedRendererTracking recursionTracking(s_visitedSet);
if (recursionTracking.isVisiting(*this))
return false;
SVGVisitedRendererTracking::Scope recursionScope(recursionTracking, *this);
auto localPoint = locationInContainer.point();
auto coordinateSystemOriginTranslation = nominalSVGLayoutLocation() - adjustedLocation;
localPoint.move(coordinateSystemOriginTranslation);
if (!pointInSVGClippingArea(localPoint))
return false;
// Give RenderSVGViewportContainer a chance to apply its viewport clip.
if (!pointIsInsideViewportClip(localPoint))
return false;
for (auto* child = lastChild(); child; child = child->previousSibling()) {
if (!child->hasLayer() && child->nodeAtPoint(request, result, locationInContainer, adjustedLocation, hitTestAction)) {
updateHitTestResult(result, locationInContainer.point() - toLayoutSize(adjustedLocation));
if (result.addNodeToListBasedTestResult(child->protectedNode().get(), request, locationInContainer, visualOverflowRect) == HitTestProgress::Stop)
return true;
}
}
// Accessibility wants to return SVG containers, if appropriate.
if (request.type() & HitTestRequest::Type::AccessibilityHitTest && m_objectBoundingBox.contains(localPoint)) {
updateHitTestResult(result, locationInContainer.point() - toLayoutSize(adjustedLocation));
if (result.addNodeToListBasedTestResult(protectedNodeForHitTest().get(), request, locationInContainer, visualOverflowRect) == HitTestProgress::Stop)
return true;
}
// Spec: Only graphical elements can be targeted by the mouse, period.
// 16.4: "If there are no graphics elements whose relevant graphics content is under the pointer (i.e., there is no target element), the event is not dispatched."
return false;
}
}
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