5417 lines
258 KiB
C++
5417 lines
258 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
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* (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
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* Copyright (C) 2005-2010, 2015 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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*/
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#include "config.h"
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#include "RenderBox.h"
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#include "CSSFontSelector.h"
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#include "ClipPathOperation.h"
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#include "ControlStates.h"
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#include "Document.h"
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#include "Editing.h"
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#include "EventHandler.h"
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#include "FloatQuad.h"
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#include "FloatRoundedRect.h"
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#include "Frame.h"
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#include "FrameView.h"
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#include "GraphicsContext.h"
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#include "HTMLBodyElement.h"
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#include "HTMLButtonElement.h"
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#include "HTMLFrameOwnerElement.h"
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#include "HTMLHtmlElement.h"
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#include "HTMLImageElement.h"
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#include "HTMLInputElement.h"
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#include "HTMLLegendElement.h"
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#include "HTMLNames.h"
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#include "HTMLSelectElement.h"
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#include "HTMLTextAreaElement.h"
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#include "HitTestResult.h"
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#include "InlineRunAndOffset.h"
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#include "LayoutIntegrationLineIterator.h"
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#include "LayoutIntegrationLineLayout.h"
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#include "LegacyInlineElementBox.h"
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#include "Page.h"
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#include "PaintInfo.h"
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#include "RenderBoxFragmentInfo.h"
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#include "RenderChildIterator.h"
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#include "RenderDeprecatedFlexibleBox.h"
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#include "RenderFlexibleBox.h"
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#include "RenderFragmentContainer.h"
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#include "RenderGeometryMap.h"
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#include "RenderGrid.h"
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#include "RenderInline.h"
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#include "RenderIterator.h"
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#include "RenderLayer.h"
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#include "RenderLayerCompositor.h"
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#include "RenderLayerScrollableArea.h"
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#include "RenderLayoutState.h"
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#include "RenderMultiColumnFlow.h"
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#include "RenderSVGResourceClipper.h"
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#include "RenderTableCell.h"
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#include "RenderTheme.h"
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#include "RenderView.h"
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#include "RuntimeApplicationChecks.h"
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#include "SVGClipPathElement.h"
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#include "ScrollAnimator.h"
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#include "ScrollbarTheme.h"
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#include "Settings.h"
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#include "StyleScrollSnapPoints.h"
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#include "TransformState.h"
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#include <algorithm>
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#include <math.h>
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#include <wtf/IsoMallocInlines.h>
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#include <wtf/StackStats.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(RenderBox);
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struct SameSizeAsRenderBox : public RenderBoxModelObject {
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virtual ~SameSizeAsRenderBox() = default;
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LayoutRect frameRect;
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LayoutBoxExtent marginBox;
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LayoutUnit preferredLogicalWidths[2];
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void* pointers[2];
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};
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COMPILE_ASSERT(sizeof(RenderBox) == sizeof(SameSizeAsRenderBox), RenderBox_should_stay_small);
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using namespace HTMLNames;
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typedef WTF::HashMap<const RenderBox*, LayoutUnit> OverrideSizeMap;
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static OverrideSizeMap* gOverridingLogicalHeightMap = nullptr;
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static OverrideSizeMap* gOverridingLogicalWidthMap = nullptr;
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// FIXME: We should store these based on physical direction.
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typedef WTF::HashMap<const RenderBox*, std::optional<LayoutUnit>> OverrideOptionalSizeMap;
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static OverrideOptionalSizeMap* gOverridingContainingBlockContentLogicalHeightMap = nullptr;
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static OverrideOptionalSizeMap* gOverridingContainingBlockContentLogicalWidthMap = nullptr;
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// Size of border belt for autoscroll. When mouse pointer in border belt,
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// autoscroll is started.
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static const int autoscrollBeltSize = 20;
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static const unsigned backgroundObscurationTestMaxDepth = 4;
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using ControlStatesRendererMap = HashMap<const RenderObject*, std::unique_ptr<ControlStates>>;
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static ControlStatesRendererMap& controlStatesRendererMap()
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{
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static NeverDestroyed<ControlStatesRendererMap> map;
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return map;
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}
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static ControlStates* controlStatesForRenderer(const RenderBox& renderer)
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{
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return controlStatesRendererMap().ensure(&renderer, [] {
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return makeUnique<ControlStates>();
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}).iterator->value.get();
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}
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static void removeControlStatesForRenderer(const RenderBox& renderer)
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{
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controlStatesRendererMap().remove(&renderer);
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}
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bool RenderBox::s_hadNonVisibleOverflow = false;
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RenderBox::RenderBox(Element& element, RenderStyle&& style, BaseTypeFlags baseTypeFlags)
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: RenderBoxModelObject(element, WTFMove(style), baseTypeFlags)
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{
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setIsBox();
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}
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RenderBox::RenderBox(Document& document, RenderStyle&& style, BaseTypeFlags baseTypeFlags)
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: RenderBoxModelObject(document, WTFMove(style), baseTypeFlags)
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{
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setIsBox();
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}
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RenderBox::~RenderBox()
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{
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// Do not add any code here. Add it to willBeDestroyed() instead.
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}
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void RenderBox::willBeDestroyed()
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{
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if (frame().eventHandler().autoscrollRenderer() == this)
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frame().eventHandler().stopAutoscrollTimer(true);
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clearOverridingContentSize();
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clearOverridingContainingBlockContentSize();
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RenderBlock::removePercentHeightDescendantIfNeeded(*this);
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ShapeOutsideInfo::removeInfo(*this);
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view().unscheduleLazyRepaint(*this);
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removeControlStatesForRenderer(*this);
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if (hasInitializedStyle() && style().hasSnapPosition())
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view().unregisterBoxWithScrollSnapPositions(*this);
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RenderBoxModelObject::willBeDestroyed();
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}
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RenderFragmentContainer* RenderBox::clampToStartAndEndFragments(RenderFragmentContainer* fragment) const
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{
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RenderFragmentedFlow* fragmentedFlow = enclosingFragmentedFlow();
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ASSERT(isRenderView() || (fragment && fragmentedFlow));
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if (isRenderView())
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return fragment;
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// We need to clamp to the block, since we want any lines or blocks that overflow out of the
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// logical top or logical bottom of the block to size as though the border box in the first and
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// last fragments extended infinitely. Otherwise the lines are going to size according to the fragments
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// they overflow into, which makes no sense when this block doesn't exist in |fragment| at all.
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RenderFragmentContainer* startFragment = nullptr;
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RenderFragmentContainer* endFragment = nullptr;
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if (!fragmentedFlow->getFragmentRangeForBox(this, startFragment, endFragment))
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return fragment;
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if (fragment->logicalTopForFragmentedFlowContent() < startFragment->logicalTopForFragmentedFlowContent())
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return startFragment;
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if (fragment->logicalTopForFragmentedFlowContent() > endFragment->logicalTopForFragmentedFlowContent())
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return endFragment;
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return fragment;
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}
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bool RenderBox::hasFragmentRangeInFragmentedFlow() const
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{
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RenderFragmentedFlow* fragmentedFlow = enclosingFragmentedFlow();
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if (!fragmentedFlow || !fragmentedFlow->hasValidFragmentInfo())
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return false;
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return fragmentedFlow->hasCachedFragmentRangeForBox(*this);
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}
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LayoutRect RenderBox::clientBoxRectInFragment(RenderFragmentContainer* fragment) const
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{
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if (!fragment)
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return clientBoxRect();
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LayoutRect clientBox = borderBoxRectInFragment(fragment);
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clientBox.setLocation(clientBox.location() + LayoutSize(borderLeft(), borderTop()));
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clientBox.setSize(clientBox.size() - LayoutSize(borderLeft() + borderRight() + verticalScrollbarWidth(), borderTop() + borderBottom() + horizontalScrollbarHeight()));
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return clientBox;
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}
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LayoutRect RenderBox::borderBoxRectInFragment(RenderFragmentContainer*, RenderBoxFragmentInfoFlags) const
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{
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return borderBoxRect();
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}
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static RenderBlockFlow* outermostBlockContainingFloatingObject(RenderBox& box)
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{
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ASSERT(box.isFloating());
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RenderBlockFlow* parentBlock = nullptr;
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for (auto& ancestor : ancestorsOfType<RenderBlockFlow>(box)) {
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if (!parentBlock || ancestor.containsFloat(box))
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parentBlock = &ancestor;
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}
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return parentBlock;
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}
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void RenderBox::removeFloatingOrPositionedChildFromBlockLists()
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{
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ASSERT(isFloatingOrOutOfFlowPositioned());
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if (renderTreeBeingDestroyed())
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return;
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if (isFloating()) {
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if (RenderBlockFlow* parentBlock = outermostBlockContainingFloatingObject(*this)) {
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parentBlock->markSiblingsWithFloatsForLayout(this);
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parentBlock->markAllDescendantsWithFloatsForLayout(this, false);
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}
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}
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if (isOutOfFlowPositioned())
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RenderBlock::removePositionedObject(*this);
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}
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void RenderBox::styleWillChange(StyleDifference diff, const RenderStyle& newStyle)
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{
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s_hadNonVisibleOverflow = hasNonVisibleOverflow();
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const RenderStyle* oldStyle = hasInitializedStyle() ? &style() : nullptr;
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if (oldStyle) {
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// The background of the root element or the body element could propagate up to
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// the canvas. Issue full repaint, when our style changes substantially.
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if (diff >= StyleDifference::Repaint && (isDocumentElementRenderer() || isBody())) {
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view().repaintRootContents();
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if (oldStyle->hasEntirelyFixedBackground() != newStyle.hasEntirelyFixedBackground())
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view().compositor().rootLayerConfigurationChanged();
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}
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// When a layout hint happens and an object's position style changes, we have to do a layout
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// to dirty the render tree using the old position value now.
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if (diff == StyleDifference::Layout && parent() && oldStyle->position() != newStyle.position()) {
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markContainingBlocksForLayout();
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if (oldStyle->position() != PositionType::Static && newStyle.hasOutOfFlowPosition())
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parent()->setChildNeedsLayout();
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if (isFloating() && !isOutOfFlowPositioned() && newStyle.hasOutOfFlowPosition())
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removeFloatingOrPositionedChildFromBlockLists();
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}
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} else if (isBody())
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view().repaintRootContents();
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bool boxContributesSnapPositions = newStyle.hasSnapPosition();
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if (boxContributesSnapPositions || (oldStyle && oldStyle->hasSnapPosition())) {
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if (boxContributesSnapPositions)
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view().registerBoxWithScrollSnapPositions(*this);
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else
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view().unregisterBoxWithScrollSnapPositions(*this);
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}
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RenderBoxModelObject::styleWillChange(diff, newStyle);
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}
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void RenderBox::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
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{
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// Horizontal writing mode definition is updated in RenderBoxModelObject::updateFromStyle,
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// (as part of the RenderBoxModelObject::styleDidChange call below). So, we can safely cache the horizontal
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// writing mode value before style change here.
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bool oldHorizontalWritingMode = isHorizontalWritingMode();
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RenderBoxModelObject::styleDidChange(diff, oldStyle);
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const RenderStyle& newStyle = style();
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if (needsLayout() && oldStyle) {
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RenderBlock::removePercentHeightDescendantIfNeeded(*this);
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// Normally we can do optimized positioning layout for absolute/fixed positioned objects. There is one special case, however, which is
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// when the positioned object's margin-before is changed. In this case the parent has to get a layout in order to run margin collapsing
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// to determine the new static position.
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if (isOutOfFlowPositioned() && newStyle.hasStaticBlockPosition(isHorizontalWritingMode()) && oldStyle->marginBefore() != newStyle.marginBefore()
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&& parent() && !parent()->normalChildNeedsLayout())
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parent()->setChildNeedsLayout();
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}
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if (RenderBlock::hasPercentHeightContainerMap() && firstChild()
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&& oldHorizontalWritingMode != isHorizontalWritingMode())
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RenderBlock::clearPercentHeightDescendantsFrom(*this);
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// If our zoom factor changes and we have a defined scrollLeft/Top, we need to adjust that value into the
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// new zoomed coordinate space.
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if (hasNonVisibleOverflow() && layer() && oldStyle && oldStyle->effectiveZoom() != newStyle.effectiveZoom()) {
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if (auto* scrollableArea = layer()->scrollableArea()) {
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ScrollPosition scrollPosition = scrollableArea->scrollPosition();
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float zoomScaleFactor = newStyle.effectiveZoom() / oldStyle->effectiveZoom();
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scrollPosition.scale(zoomScaleFactor);
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scrollableArea->setPostLayoutScrollPosition(scrollPosition);
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}
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}
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// Our opaqueness might have changed without triggering layout.
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if (diff >= StyleDifference::Repaint && diff <= StyleDifference::RepaintLayer) {
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auto parentToInvalidate = parent();
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for (unsigned i = 0; i < backgroundObscurationTestMaxDepth && parentToInvalidate; ++i) {
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parentToInvalidate->invalidateBackgroundObscurationStatus();
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parentToInvalidate = parentToInvalidate->parent();
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}
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}
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bool isBodyRenderer = isBody();
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bool isDocElementRenderer = isDocumentElementRenderer();
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if (isDocElementRenderer || isBodyRenderer) {
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// Propagate the new writing mode and direction up to the RenderView.
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auto* documentElementRenderer = document().documentElement()->renderer();
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auto& viewStyle = view().mutableStyle();
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bool rootStyleChanged = false;
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bool viewDirectionOrWritingModeChanged = false;
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auto* rootRenderer = isBodyRenderer ? documentElementRenderer : nullptr;
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if (viewStyle.direction() != newStyle.direction() && (isDocElementRenderer || !documentElementRenderer->style().hasExplicitlySetDirection())) {
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viewStyle.setDirection(newStyle.direction());
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viewDirectionOrWritingModeChanged = true;
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if (isBodyRenderer) {
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rootRenderer->mutableStyle().setDirection(newStyle.direction());
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rootStyleChanged = true;
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}
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setNeedsLayoutAndPrefWidthsRecalc();
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view().frameView().topContentDirectionDidChange();
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}
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if (viewStyle.writingMode() != newStyle.writingMode() && (isDocElementRenderer || !documentElementRenderer->style().hasExplicitlySetWritingMode())) {
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viewStyle.setWritingMode(newStyle.writingMode());
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viewDirectionOrWritingModeChanged = true;
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view().setHorizontalWritingMode(newStyle.isHorizontalWritingMode());
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view().markAllDescendantsWithFloatsForLayout();
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if (isBodyRenderer) {
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rootStyleChanged = true;
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rootRenderer->mutableStyle().setWritingMode(newStyle.writingMode());
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rootRenderer->setHorizontalWritingMode(newStyle.isHorizontalWritingMode());
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}
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setNeedsLayoutAndPrefWidthsRecalc();
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}
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#if ENABLE(DARK_MODE_CSS)
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view().frameView().recalculateBaseBackgroundColor();
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#endif
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view().frameView().recalculateScrollbarOverlayStyle();
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const Pagination& pagination = view().frameView().pagination();
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if (viewDirectionOrWritingModeChanged && pagination.mode != Pagination::Unpaginated) {
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viewStyle.setColumnStylesFromPaginationMode(pagination.mode);
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if (view().multiColumnFlow())
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view().updateColumnProgressionFromStyle(viewStyle);
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}
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if (viewDirectionOrWritingModeChanged && view().multiColumnFlow())
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view().updateStylesForColumnChildren();
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if (rootStyleChanged && is<RenderBlockFlow>(rootRenderer) && downcast<RenderBlockFlow>(*rootRenderer).multiColumnFlow())
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downcast<RenderBlockFlow>(*rootRenderer).updateStylesForColumnChildren();
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if (isBodyRenderer && pagination.mode != Pagination::Unpaginated && page().paginationLineGridEnabled()) {
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// Propagate the body font back up to the RenderView and use it as
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// the basis of the grid.
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if (newStyle.fontDescription() != view().style().fontDescription()) {
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view().mutableStyle().setFontDescription(FontCascadeDescription { newStyle.fontDescription() });
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view().mutableStyle().fontCascade().update(&document().fontSelector());
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}
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}
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if (diff != StyleDifference::Equal)
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view().compositor().rootOrBodyStyleChanged(*this, oldStyle);
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}
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if ((oldStyle && oldStyle->shapeOutside()) || style().shapeOutside())
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updateShapeOutsideInfoAfterStyleChange(style(), oldStyle);
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updateGridPositionAfterStyleChange(style(), oldStyle);
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// Changing the position from/to absolute can potentially create/remove flex/grid items, as absolutely positioned
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// children of a flex/grid box are out-of-flow, and thus, not flex/grid items. This means that we need to clear
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// any override content size set by our container, because it would likely be incorrect after the style change.
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if (isOutOfFlowPositioned() && parent() && parent()->style().isDisplayFlexibleOrGridBox())
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clearOverridingContentSize();
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#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
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if (diff >= StyleDifference::Repaint) {
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if (auto* lineLayout = LayoutIntegration::LineLayout::containing(*this))
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lineLayout->updateStyle(*this);
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}
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#endif
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}
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void RenderBox::updateGridPositionAfterStyleChange(const RenderStyle& style, const RenderStyle* oldStyle)
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{
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if (!oldStyle || !is<RenderGrid>(parent()))
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return;
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if (oldStyle->gridItemColumnStart() == style.gridItemColumnStart()
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&& oldStyle->gridItemColumnEnd() == style.gridItemColumnEnd()
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&& oldStyle->gridItemRowStart() == style.gridItemRowStart()
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&& oldStyle->gridItemRowEnd() == style.gridItemRowEnd()
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&& oldStyle->order() == style.order()
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&& oldStyle->hasOutOfFlowPosition() == style.hasOutOfFlowPosition())
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return;
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// Positioned items don't participate on the layout of the grid,
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// so we don't need to mark the grid as dirty if they change positions.
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if (oldStyle->hasOutOfFlowPosition() && style.hasOutOfFlowPosition())
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return;
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// It should be possible to not dirty the grid in some cases (like moving an
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// explicitly placed grid item).
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// For now, it's more simple to just always recompute the grid.
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downcast<RenderGrid>(*parent()).dirtyGrid();
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}
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void RenderBox::updateShapeOutsideInfoAfterStyleChange(const RenderStyle& style, const RenderStyle* oldStyle)
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{
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const ShapeValue* shapeOutside = style.shapeOutside();
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const ShapeValue* oldShapeOutside = oldStyle ? oldStyle->shapeOutside() : nullptr;
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Length shapeMargin = style.shapeMargin();
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Length oldShapeMargin = oldStyle ? oldStyle->shapeMargin() : RenderStyle::initialShapeMargin();
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float shapeImageThreshold = style.shapeImageThreshold();
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float oldShapeImageThreshold = oldStyle ? oldStyle->shapeImageThreshold() : RenderStyle::initialShapeImageThreshold();
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// FIXME: A future optimization would do a deep comparison for equality. (bug 100811)
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if (shapeOutside == oldShapeOutside && shapeMargin == oldShapeMargin && shapeImageThreshold == oldShapeImageThreshold)
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return;
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if (!shapeOutside)
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ShapeOutsideInfo::removeInfo(*this);
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else
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ShapeOutsideInfo::ensureInfo(*this).markShapeAsDirty();
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if (shapeOutside || shapeOutside != oldShapeOutside)
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markShapeOutsideDependentsForLayout();
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}
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void RenderBox::updateFromStyle()
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{
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RenderBoxModelObject::updateFromStyle();
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const RenderStyle& styleToUse = style();
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bool isDocElementRenderer = isDocumentElementRenderer();
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bool isViewObject = isRenderView();
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|
|
// The root and the RenderView always paint their backgrounds/borders.
|
|
if (isDocElementRenderer || isViewObject)
|
|
setHasVisibleBoxDecorations(true);
|
|
|
|
setFloating(!isOutOfFlowPositioned() && styleToUse.isFloating());
|
|
|
|
// We also handle <body> and <html>, whose overflow applies to the viewport.
|
|
if (!(styleToUse.overflowX() == Overflow::Visible && styleToUse.overflowY() == Overflow::Visible) && !isDocElementRenderer && isRenderBlock()) {
|
|
bool boxHasNonVisibleOverflow = true;
|
|
if (isBody()) {
|
|
// Overflow on the body can propagate to the viewport under the following conditions.
|
|
// (1) The root element is <html>.
|
|
// (2) We are the primary <body> (can be checked by looking at document.body).
|
|
// (3) The root element has visible overflow.
|
|
if (is<HTMLHtmlElement>(*document().documentElement())
|
|
&& document().body() == element()
|
|
&& document().documentElement()->renderer()->style().overflowX() == Overflow::Visible) {
|
|
boxHasNonVisibleOverflow = false;
|
|
}
|
|
}
|
|
// Check for overflow clip.
|
|
// It's sufficient to just check one direction, since it's illegal to have visible on only one overflow value.
|
|
if (boxHasNonVisibleOverflow) {
|
|
if (!s_hadNonVisibleOverflow && hasRenderOverflow()) {
|
|
// Erase the overflow.
|
|
// Overflow changes have to result in immediate repaints of the entire layout overflow area because
|
|
// repaints issued by removal of descendants get clipped using the updated style when they shouldn't.
|
|
repaintRectangle(visualOverflowRect());
|
|
repaintRectangle(layoutOverflowRect());
|
|
}
|
|
setHasNonVisibleOverflow();
|
|
}
|
|
}
|
|
setHasTransformRelatedProperty(styleToUse.hasTransformRelatedProperty());
|
|
setHasReflection(styleToUse.boxReflect());
|
|
}
|
|
|
|
void RenderBox::layout()
|
|
{
|
|
StackStats::LayoutCheckPoint layoutCheckPoint;
|
|
ASSERT(needsLayout());
|
|
|
|
RenderObject* child = firstChild();
|
|
if (!child) {
|
|
clearNeedsLayout();
|
|
return;
|
|
}
|
|
|
|
LayoutStateMaintainer statePusher(*this, locationOffset(), style().isFlippedBlocksWritingMode());
|
|
while (child) {
|
|
if (child->needsLayout())
|
|
downcast<RenderElement>(*child).layout();
|
|
ASSERT(!child->needsLayout());
|
|
child = child->nextSibling();
|
|
}
|
|
invalidateBackgroundObscurationStatus();
|
|
clearNeedsLayout();
|
|
}
|
|
|
|
// More IE extensions. clientWidth and clientHeight represent the interior of an object
|
|
// excluding border and scrollbar.
|
|
LayoutUnit RenderBox::clientWidth() const
|
|
{
|
|
return paddingBoxWidth();
|
|
}
|
|
|
|
LayoutUnit RenderBox::clientHeight() const
|
|
{
|
|
return paddingBoxHeight();
|
|
}
|
|
|
|
int RenderBox::scrollWidth() const
|
|
{
|
|
if (hasPotentiallyScrollableOverflow() && layer())
|
|
return layer()->scrollWidth();
|
|
// For objects with visible overflow, this matches IE.
|
|
// FIXME: Need to work right with writing modes.
|
|
if (style().isLeftToRightDirection()) {
|
|
// FIXME: This should use snappedIntSize() instead with absolute coordinates.
|
|
return roundToInt(std::max(clientWidth(), layoutOverflowRect().maxX() - borderLeft()));
|
|
}
|
|
return roundToInt(clientWidth() - std::min<LayoutUnit>(0, layoutOverflowRect().x() - borderLeft()));
|
|
}
|
|
|
|
int RenderBox::scrollHeight() const
|
|
{
|
|
if (hasPotentiallyScrollableOverflow() && layer())
|
|
return layer()->scrollHeight();
|
|
// For objects with visible overflow, this matches IE.
|
|
// FIXME: Need to work right with writing modes.
|
|
// FIXME: This should use snappedIntSize() instead with absolute coordinates.
|
|
return roundToInt(std::max(clientHeight(), layoutOverflowRect().maxY() - borderTop()));
|
|
}
|
|
|
|
int RenderBox::scrollLeft() const
|
|
{
|
|
auto* scrollableArea = layer() ? layer()->scrollableArea() : nullptr;
|
|
return (hasNonVisibleOverflow() && scrollableArea) ? scrollableArea->scrollPosition().x() : 0;
|
|
}
|
|
|
|
int RenderBox::scrollTop() const
|
|
{
|
|
auto* scrollableArea = layer() ? layer()->scrollableArea() : nullptr;
|
|
return (hasNonVisibleOverflow() && scrollableArea) ? scrollableArea->scrollPosition().y() : 0;
|
|
}
|
|
|
|
void RenderBox::resetLogicalHeightBeforeLayoutIfNeeded()
|
|
{
|
|
if (shouldResetLogicalHeightBeforeLayout() || (is<RenderBlock>(parent()) && downcast<RenderBlock>(*parent()).shouldResetChildLogicalHeightBeforeLayout(*this)))
|
|
setLogicalHeight(0_lu);
|
|
}
|
|
|
|
static void setupWheelEventMonitor(RenderLayerScrollableArea& scrollableArea)
|
|
{
|
|
Page& page = scrollableArea.layer().renderer().page();
|
|
if (!page.isMonitoringWheelEvents())
|
|
return;
|
|
scrollableArea.scrollAnimator().setWheelEventTestMonitor(page.wheelEventTestMonitor());
|
|
}
|
|
|
|
void RenderBox::setScrollLeft(int newLeft, const ScrollPositionChangeOptions& options)
|
|
{
|
|
if (!hasPotentiallyScrollableOverflow() || !layer())
|
|
return;
|
|
auto* scrollableArea = layer()->scrollableArea();
|
|
ASSERT(scrollableArea);
|
|
setupWheelEventMonitor(*scrollableArea);
|
|
scrollableArea->scrollToXPosition(newLeft, options);
|
|
}
|
|
|
|
void RenderBox::setScrollTop(int newTop, const ScrollPositionChangeOptions& options)
|
|
{
|
|
if (!hasPotentiallyScrollableOverflow() || !layer())
|
|
return;
|
|
auto* scrollableArea = layer()->scrollableArea();
|
|
ASSERT(scrollableArea);
|
|
setupWheelEventMonitor(*scrollableArea);
|
|
scrollableArea->scrollToYPosition(newTop, options);
|
|
}
|
|
|
|
void RenderBox::setScrollPosition(const ScrollPosition& position, const ScrollPositionChangeOptions& options)
|
|
{
|
|
if (!hasPotentiallyScrollableOverflow() || !layer())
|
|
return;
|
|
auto* scrollableArea = layer()->scrollableArea();
|
|
ASSERT(scrollableArea);
|
|
setupWheelEventMonitor(*scrollableArea);
|
|
scrollableArea->setScrollPosition(position, options);
|
|
}
|
|
|
|
void RenderBox::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const
|
|
{
|
|
rects.append(snappedIntRect(accumulatedOffset, size()));
|
|
}
|
|
|
|
void RenderBox::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const
|
|
{
|
|
RenderFragmentedFlow* fragmentedFlow = enclosingFragmentedFlow();
|
|
if (fragmentedFlow && fragmentedFlow->absoluteQuadsForBox(quads, wasFixed, this))
|
|
return;
|
|
|
|
auto localRect = FloatRect { 0, 0, width(), height() };
|
|
quads.append(localToAbsoluteQuad(localRect, UseTransforms, wasFixed));
|
|
}
|
|
|
|
void RenderBox::updateLayerTransform()
|
|
{
|
|
// Transform-origin depends on box size, so we need to update the layer transform after layout.
|
|
if (hasLayer())
|
|
layer()->updateTransform();
|
|
}
|
|
|
|
LayoutUnit RenderBox::constrainLogicalWidthInFragmentByMinMax(LayoutUnit logicalWidth, LayoutUnit availableWidth, RenderBlock& cb, RenderFragmentContainer* fragment, AllowIntrinsic allowIntrinsic) const
|
|
{
|
|
const RenderStyle& styleToUse = style();
|
|
|
|
if (shouldComputeLogicalHeightFromAspectRatio()) {
|
|
auto [logicalMinWidth, logicalMaxWidth] = computeMinMaxLogicalWidthFromAspectRatio();
|
|
logicalWidth = std::clamp(logicalWidth, logicalMinWidth, logicalMaxWidth);
|
|
}
|
|
|
|
if (!styleToUse.logicalMaxWidth().isUndefined() && (allowIntrinsic == AllowIntrinsic::Yes || !styleToUse.logicalMaxWidth().isIntrinsic()))
|
|
logicalWidth = std::min(logicalWidth, computeLogicalWidthInFragmentUsing(MaxSize, styleToUse.logicalMaxWidth(), availableWidth, cb, fragment));
|
|
if (allowIntrinsic == AllowIntrinsic::No && styleToUse.logicalMinWidth().isIntrinsic())
|
|
return logicalWidth;
|
|
auto minLength = styleToUse.logicalMinWidth();
|
|
if (styleToUse.hasAspectRatio() && minLength.isAuto() && (styleToUse.logicalWidth().isAuto() || styleToUse.logicalWidth().isMinContent() || styleToUse.logicalWidth().isMaxContent()) && styleToUse.overflowInlineDirection() == Overflow::Visible) {
|
|
// Make sure we actually used the aspect ratio.
|
|
if (shouldComputeLogicalWidthFromAspectRatio())
|
|
minLength = Length(LengthType::MinContent);
|
|
}
|
|
return std::max(logicalWidth, computeLogicalWidthInFragmentUsing(MinSize, minLength, availableWidth, cb, fragment));
|
|
}
|
|
|
|
LayoutUnit RenderBox::constrainLogicalHeightByMinMax(LayoutUnit logicalHeight, std::optional<LayoutUnit> intrinsicContentHeight) const
|
|
{
|
|
const RenderStyle& styleToUse = style();
|
|
if (!styleToUse.logicalMaxHeight().isUndefined()) {
|
|
if (std::optional<LayoutUnit> maxH = computeLogicalHeightUsing(MaxSize, styleToUse.logicalMaxHeight(), intrinsicContentHeight))
|
|
logicalHeight = std::min(logicalHeight, maxH.value());
|
|
}
|
|
auto logicalMinHeight = styleToUse.logicalMinHeight();
|
|
if (logicalMinHeight.isAuto() && shouldComputeLogicalHeightFromAspectRatio() && intrinsicContentHeight && styleToUse.overflowBlockDirection() == Overflow::Visible) {
|
|
auto heightFromAspectRatio = blockSizeFromAspectRatio(horizontalBorderAndPaddingExtent(), verticalBorderAndPaddingExtent(), LayoutUnit(style().logicalAspectRatio()), style().boxSizingForAspectRatio(), logicalWidth()) - borderAndPaddingLogicalHeight();
|
|
if (firstChild())
|
|
heightFromAspectRatio = std::max(heightFromAspectRatio, *intrinsicContentHeight);
|
|
logicalMinHeight = Length(heightFromAspectRatio, LengthType::Fixed);
|
|
}
|
|
if (logicalMinHeight.isMinContent() || logicalMinHeight.isMaxContent())
|
|
logicalMinHeight = Length();
|
|
if (std::optional<LayoutUnit> computedLogicalHeight = computeLogicalHeightUsing(MinSize, logicalMinHeight, intrinsicContentHeight))
|
|
return std::max(logicalHeight, computedLogicalHeight.value());
|
|
return logicalHeight;
|
|
}
|
|
|
|
LayoutUnit RenderBox::constrainContentBoxLogicalHeightByMinMax(LayoutUnit logicalHeight, std::optional<LayoutUnit> intrinsicContentHeight) const
|
|
{
|
|
const RenderStyle& styleToUse = style();
|
|
if (!styleToUse.logicalMaxHeight().isUndefined()) {
|
|
if (std::optional<LayoutUnit> maxH = computeContentLogicalHeight(MaxSize, styleToUse.logicalMaxHeight(), intrinsicContentHeight))
|
|
logicalHeight = std::min(logicalHeight, maxH.value());
|
|
}
|
|
if (std::optional<LayoutUnit> computedContentLogicalHeight = computeContentLogicalHeight(MinSize, styleToUse.logicalMinHeight(), intrinsicContentHeight))
|
|
return std::max(logicalHeight, computedContentLogicalHeight.value());
|
|
return logicalHeight;
|
|
}
|
|
|
|
RoundedRect::Radii RenderBox::borderRadii() const
|
|
{
|
|
auto& style = this->style();
|
|
LayoutRect bounds = frameRect();
|
|
|
|
unsigned borderLeft = style.borderLeftWidth();
|
|
unsigned borderTop = style.borderTopWidth();
|
|
bounds.moveBy(LayoutPoint(borderLeft, borderTop));
|
|
bounds.contract(borderLeft + style.borderRightWidth(), borderTop + style.borderBottomWidth());
|
|
return style.getRoundedBorderFor(bounds).radii();
|
|
}
|
|
|
|
RoundedRect RenderBox::roundedBorderBoxRect() const
|
|
{
|
|
return style().getRoundedInnerBorderFor(borderBoxRect());
|
|
}
|
|
|
|
LayoutRect RenderBox::paddingBoxRect() const
|
|
{
|
|
auto verticalScrollbarWidth = this->verticalScrollbarWidth();
|
|
LayoutUnit offsetForScrollbar = shouldPlaceVerticalScrollbarOnLeft() ? verticalScrollbarWidth : 0;
|
|
|
|
return LayoutRect(borderLeft() + offsetForScrollbar, borderTop(),
|
|
width() - borderLeft() - borderRight() - verticalScrollbarWidth,
|
|
height() - borderTop() - borderBottom() - horizontalScrollbarHeight());
|
|
}
|
|
|
|
LayoutRect RenderBox::contentBoxRect() const
|
|
{
|
|
return { contentBoxLocation(), contentSize() };
|
|
}
|
|
|
|
LayoutPoint RenderBox::contentBoxLocation() const
|
|
{
|
|
LayoutUnit scrollbarSpace = shouldPlaceVerticalScrollbarOnLeft() ? verticalScrollbarWidth() : 0;
|
|
return { borderLeft() + paddingLeft() + scrollbarSpace, borderTop() + paddingTop() };
|
|
}
|
|
|
|
LayoutRect RenderBox::referenceBox(CSSBoxType boxType) const
|
|
{
|
|
LayoutRect referenceBox;
|
|
switch (boxType) {
|
|
case CSSBoxType::ContentBox:
|
|
case CSSBoxType::FillBox:
|
|
return contentBoxRect();
|
|
case CSSBoxType::PaddingBox:
|
|
return paddingBoxRect();
|
|
case CSSBoxType::MarginBox:
|
|
return marginBoxRect();
|
|
// stroke-box, view-box compute to border-box for HTML elements.
|
|
case CSSBoxType::StrokeBox:
|
|
case CSSBoxType::ViewBox:
|
|
case CSSBoxType::BorderBox:
|
|
case CSSBoxType::BoxMissing:
|
|
return borderBoxRect();
|
|
}
|
|
return { };
|
|
}
|
|
|
|
IntRect RenderBox::absoluteContentBox() const
|
|
{
|
|
// This is wrong with transforms and flipped writing modes.
|
|
IntRect rect = snappedIntRect(contentBoxRect());
|
|
FloatPoint absPos = localToAbsolute();
|
|
rect.move(absPos.x(), absPos.y());
|
|
return rect;
|
|
}
|
|
|
|
FloatQuad RenderBox::absoluteContentQuad() const
|
|
{
|
|
LayoutRect rect = contentBoxRect();
|
|
return localToAbsoluteQuad(FloatRect(rect));
|
|
}
|
|
|
|
LayoutRect RenderBox::outlineBoundsForRepaint(const RenderLayerModelObject* repaintContainer, const RenderGeometryMap* geometryMap) const
|
|
{
|
|
LayoutRect box = borderBoundingBox();
|
|
adjustRectForOutlineAndShadow(box);
|
|
|
|
if (repaintContainer != this) {
|
|
FloatQuad containerRelativeQuad;
|
|
if (geometryMap)
|
|
containerRelativeQuad = geometryMap->mapToContainer(box, repaintContainer);
|
|
else
|
|
containerRelativeQuad = localToContainerQuad(FloatRect(box), repaintContainer);
|
|
|
|
box = LayoutRect(containerRelativeQuad.boundingBox());
|
|
}
|
|
|
|
// FIXME: layoutDelta needs to be applied in parts before/after transforms and
|
|
// repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308
|
|
box.move(view().frameView().layoutContext().layoutDelta());
|
|
|
|
return LayoutRect(snapRectToDevicePixels(box, document().deviceScaleFactor()));
|
|
}
|
|
|
|
void RenderBox::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint& additionalOffset, const RenderLayerModelObject*)
|
|
{
|
|
if (!size().isEmpty())
|
|
rects.append(LayoutRect(additionalOffset, size()));
|
|
}
|
|
|
|
int RenderBox::reflectionOffset() const
|
|
{
|
|
if (!style().boxReflect())
|
|
return 0;
|
|
if (style().boxReflect()->direction() == ReflectionDirection::Left || style().boxReflect()->direction() == ReflectionDirection::Right)
|
|
return valueForLength(style().boxReflect()->offset(), borderBoxRect().width());
|
|
return valueForLength(style().boxReflect()->offset(), borderBoxRect().height());
|
|
}
|
|
|
|
LayoutRect RenderBox::reflectedRect(const LayoutRect& r) const
|
|
{
|
|
if (!style().boxReflect())
|
|
return LayoutRect();
|
|
|
|
LayoutRect box = borderBoxRect();
|
|
LayoutRect result = r;
|
|
switch (style().boxReflect()->direction()) {
|
|
case ReflectionDirection::Below:
|
|
result.setY(box.maxY() + reflectionOffset() + (box.maxY() - r.maxY()));
|
|
break;
|
|
case ReflectionDirection::Above:
|
|
result.setY(box.y() - reflectionOffset() - box.height() + (box.maxY() - r.maxY()));
|
|
break;
|
|
case ReflectionDirection::Left:
|
|
result.setX(box.x() - reflectionOffset() - box.width() + (box.maxX() - r.maxX()));
|
|
break;
|
|
case ReflectionDirection::Right:
|
|
result.setX(box.maxX() + reflectionOffset() + (box.maxX() - r.maxX()));
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
bool RenderBox::fixedElementLaysOutRelativeToFrame(const FrameView& frameView) const
|
|
{
|
|
return isFixedPositioned() && container()->isRenderView() && frameView.fixedElementsLayoutRelativeToFrame();
|
|
}
|
|
|
|
bool RenderBox::includeVerticalScrollbarSize() const
|
|
{
|
|
return hasNonVisibleOverflow() && layer() && !layer()->hasOverlayScrollbars()
|
|
&& (style().overflowY() == Overflow::Scroll || style().overflowY() == Overflow::Auto);
|
|
}
|
|
|
|
bool RenderBox::includeHorizontalScrollbarSize() const
|
|
{
|
|
return hasNonVisibleOverflow() && layer() && !layer()->hasOverlayScrollbars()
|
|
&& (style().overflowX() == Overflow::Scroll || style().overflowX() == Overflow::Auto);
|
|
}
|
|
|
|
int RenderBox::verticalScrollbarWidth() const
|
|
{
|
|
auto* scrollableArea = layer() ? layer()->scrollableArea() : nullptr;
|
|
if (!scrollableArea)
|
|
return 0;
|
|
return includeVerticalScrollbarSize() ? scrollableArea->verticalScrollbarWidth() : 0;
|
|
}
|
|
|
|
int RenderBox::horizontalScrollbarHeight() const
|
|
{
|
|
auto* scrollableArea = layer() ? layer()->scrollableArea() : nullptr;
|
|
if (!scrollableArea)
|
|
return 0;
|
|
return includeHorizontalScrollbarSize() ? scrollableArea->horizontalScrollbarHeight() : 0;
|
|
}
|
|
|
|
int RenderBox::intrinsicScrollbarLogicalWidth() const
|
|
{
|
|
if (!hasNonVisibleOverflow())
|
|
return 0;
|
|
|
|
if (isHorizontalWritingMode() && (style().overflowY() == Overflow::Scroll && !canUseOverlayScrollbars())) {
|
|
ASSERT(layer() && layer()->scrollableArea() && layer()->scrollableArea()->hasVerticalScrollbar());
|
|
return verticalScrollbarWidth();
|
|
}
|
|
|
|
if (!isHorizontalWritingMode() && (style().overflowX() == Overflow::Scroll && !canUseOverlayScrollbars())) {
|
|
ASSERT(layer() && layer()->scrollableArea() && layer()->scrollableArea()->hasHorizontalScrollbar());
|
|
return horizontalScrollbarHeight();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool RenderBox::scrollLayer(ScrollDirection direction, ScrollGranularity granularity, float multiplier, Element** stopElement)
|
|
{
|
|
auto* scrollableArea = layer() ? layer()->scrollableArea() : nullptr;
|
|
if (scrollableArea && scrollableArea->scroll(direction, granularity, multiplier)) {
|
|
if (stopElement)
|
|
*stopElement = element();
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool RenderBox::scroll(ScrollDirection direction, ScrollGranularity granularity, float multiplier, Element** stopElement, RenderBox* startBox, const IntPoint& wheelEventAbsolutePoint)
|
|
{
|
|
if (scrollLayer(direction, granularity, multiplier, stopElement))
|
|
return true;
|
|
|
|
if (stopElement && *stopElement && *stopElement == element())
|
|
return true;
|
|
|
|
RenderBlock* nextScrollBlock = containingBlock();
|
|
|
|
if (nextScrollBlock && !nextScrollBlock->isRenderView())
|
|
return nextScrollBlock->scroll(direction, granularity, multiplier, stopElement, startBox, wheelEventAbsolutePoint);
|
|
|
|
return false;
|
|
}
|
|
|
|
bool RenderBox::logicalScroll(ScrollLogicalDirection direction, ScrollGranularity granularity, float multiplier, Element** stopElement)
|
|
{
|
|
bool scrolled = false;
|
|
|
|
if (auto* scrollableArea = layer() ? layer()->scrollableArea() : nullptr) {
|
|
#if PLATFORM(COCOA)
|
|
// On Mac only we reset the inline direction position when doing a document scroll (e.g., hitting Home/End).
|
|
if (granularity == ScrollByDocument)
|
|
scrolled = scrollableArea->scroll(logicalToPhysical(ScrollInlineDirectionBackward, isHorizontalWritingMode(), style().isFlippedBlocksWritingMode()), ScrollByDocument, multiplier);
|
|
#endif
|
|
if (scrollableArea->scroll(logicalToPhysical(direction, isHorizontalWritingMode(), style().isFlippedBlocksWritingMode()), granularity, multiplier))
|
|
scrolled = true;
|
|
|
|
if (scrolled) {
|
|
if (stopElement)
|
|
*stopElement = element();
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (stopElement && *stopElement && *stopElement == element())
|
|
return true;
|
|
|
|
RenderBlock* b = containingBlock();
|
|
if (b && !b->isRenderView())
|
|
return b->logicalScroll(direction, granularity, multiplier, stopElement);
|
|
return false;
|
|
}
|
|
|
|
bool RenderBox::canBeScrolledAndHasScrollableArea() const
|
|
{
|
|
return canBeProgramaticallyScrolled() && (hasHorizontalOverflow() || hasVerticalOverflow());
|
|
}
|
|
|
|
bool RenderBox::isScrollableOrRubberbandableBox() const
|
|
{
|
|
return canBeScrolledAndHasScrollableArea();
|
|
}
|
|
|
|
bool RenderBox::requiresLayerWithScrollableArea() const
|
|
{
|
|
// FIXME: This is wrong; these boxes' layers should not need ScrollableAreas via RenderLayer.
|
|
if (isRenderView() || isDocumentElementRenderer())
|
|
return true;
|
|
|
|
if (hasPotentiallyScrollableOverflow())
|
|
return true;
|
|
|
|
if (style().resize() != Resize::None)
|
|
return true;
|
|
|
|
if (isHTMLMarquee() && style().marqueeBehavior() != MarqueeBehavior::None)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
// FIXME: This is badly named. overflow:hidden can be programmatically scrolled, yet this returns false in that case.
|
|
bool RenderBox::canBeProgramaticallyScrolled() const
|
|
{
|
|
if (isRenderView())
|
|
return true;
|
|
|
|
if (!hasPotentiallyScrollableOverflow())
|
|
return false;
|
|
|
|
if (hasScrollableOverflowX() || hasScrollableOverflowY())
|
|
return true;
|
|
|
|
return element() && element()->hasEditableStyle();
|
|
}
|
|
|
|
bool RenderBox::usesCompositedScrolling() const
|
|
{
|
|
return hasNonVisibleOverflow() && hasLayer() && layer()->usesCompositedScrolling();
|
|
}
|
|
|
|
void RenderBox::autoscroll(const IntPoint& position)
|
|
{
|
|
if (layer())
|
|
layer()->autoscroll(position);
|
|
}
|
|
|
|
// There are two kinds of renderer that can autoscroll.
|
|
bool RenderBox::canAutoscroll() const
|
|
{
|
|
if (isRenderView())
|
|
return view().frameView().isScrollable();
|
|
|
|
// Check for a box that can be scrolled in its own right.
|
|
if (canBeScrolledAndHasScrollableArea())
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
// If specified point is in border belt, returned offset denotes direction of
|
|
// scrolling.
|
|
IntSize RenderBox::calculateAutoscrollDirection(const IntPoint& windowPoint) const
|
|
{
|
|
IntRect box(absoluteBoundingBoxRect());
|
|
box.moveBy(view().frameView().scrollPosition());
|
|
IntRect windowBox = view().frameView().contentsToWindow(box);
|
|
|
|
IntPoint windowAutoscrollPoint = windowPoint;
|
|
|
|
if (windowAutoscrollPoint.x() < windowBox.x() + autoscrollBeltSize)
|
|
windowAutoscrollPoint.move(-autoscrollBeltSize, 0);
|
|
else if (windowAutoscrollPoint.x() > windowBox.maxX() - autoscrollBeltSize)
|
|
windowAutoscrollPoint.move(autoscrollBeltSize, 0);
|
|
|
|
if (windowAutoscrollPoint.y() < windowBox.y() + autoscrollBeltSize)
|
|
windowAutoscrollPoint.move(0, -autoscrollBeltSize);
|
|
else if (windowAutoscrollPoint.y() > windowBox.maxY() - autoscrollBeltSize)
|
|
windowAutoscrollPoint.move(0, autoscrollBeltSize);
|
|
|
|
return windowAutoscrollPoint - windowPoint;
|
|
}
|
|
|
|
RenderBox* RenderBox::findAutoscrollable(RenderObject* renderer)
|
|
{
|
|
while (renderer && !(is<RenderBox>(*renderer) && downcast<RenderBox>(*renderer).canAutoscroll())) {
|
|
if (is<RenderView>(*renderer) && renderer->document().ownerElement())
|
|
renderer = renderer->document().ownerElement()->renderer();
|
|
else
|
|
renderer = renderer->parent();
|
|
}
|
|
|
|
return is<RenderBox>(renderer) ? downcast<RenderBox>(renderer) : nullptr;
|
|
}
|
|
|
|
void RenderBox::panScroll(const IntPoint& source)
|
|
{
|
|
if (auto* scrollableArea = layer() ? layer()->scrollableArea() : nullptr)
|
|
scrollableArea->panScrollFromPoint(source);
|
|
}
|
|
|
|
bool RenderBox::canUseOverlayScrollbars() const
|
|
{
|
|
return !style().hasPseudoStyle(PseudoId::Scrollbar) && ScrollbarTheme::theme().usesOverlayScrollbars();
|
|
}
|
|
|
|
bool RenderBox::hasAutoScrollbar(ScrollbarOrientation orientation) const
|
|
{
|
|
if (!hasNonVisibleOverflow())
|
|
return false;
|
|
|
|
auto isAutoOrScrollWithOverlayScrollbar = [&](Overflow overflow) {
|
|
return overflow == Overflow::Auto || (overflow == Overflow::Scroll && canUseOverlayScrollbars());
|
|
};
|
|
|
|
switch (orientation) {
|
|
case ScrollbarOrientation::HorizontalScrollbar:
|
|
return isAutoOrScrollWithOverlayScrollbar(style().overflowX());
|
|
case ScrollbarOrientation::VerticalScrollbar:
|
|
return isAutoOrScrollWithOverlayScrollbar(style().overflowY());
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool RenderBox::hasAlwaysPresentScrollbar(ScrollbarOrientation orientation) const
|
|
{
|
|
if (!hasNonVisibleOverflow())
|
|
return false;
|
|
|
|
auto isAlwaysVisibleScrollbar = [&](Overflow overflow) {
|
|
return overflow == Overflow::Scroll && !canUseOverlayScrollbars();
|
|
};
|
|
|
|
switch (orientation) {
|
|
case ScrollbarOrientation::HorizontalScrollbar:
|
|
return isAlwaysVisibleScrollbar(style().overflowX());
|
|
case ScrollbarOrientation::VerticalScrollbar:
|
|
return isAlwaysVisibleScrollbar(style().overflowY());
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool RenderBox::needsPreferredWidthsRecalculation() const
|
|
{
|
|
return style().paddingStart().isPercentOrCalculated() || style().paddingEnd().isPercentOrCalculated() || (style().hasAspectRatio() && hasRelativeLogicalHeight());
|
|
}
|
|
|
|
ScrollPosition RenderBox::scrollPosition() const
|
|
{
|
|
if (!hasPotentiallyScrollableOverflow())
|
|
return { 0, 0 };
|
|
|
|
ASSERT(hasLayer());
|
|
auto* scrollableArea = layer()->scrollableArea();
|
|
if (!scrollableArea)
|
|
return { 0, 0 };
|
|
|
|
return scrollableArea->scrollPosition();
|
|
}
|
|
|
|
LayoutSize RenderBox::cachedSizeForOverflowClip() const
|
|
{
|
|
ASSERT(hasNonVisibleOverflow());
|
|
ASSERT(hasLayer());
|
|
return layer()->size();
|
|
}
|
|
|
|
bool RenderBox::applyCachedClipAndScrollPosition(LayoutRect& rect, const RenderLayerModelObject* container, VisibleRectContext context) const
|
|
{
|
|
flipForWritingMode(rect);
|
|
|
|
if (context.options.contains(VisibleRectContextOption::ApplyCompositedContainerScrolls) || this != container || !usesCompositedScrolling())
|
|
rect.moveBy(-scrollPosition()); // For overflow:auto/scroll/hidden.
|
|
|
|
// Do not clip scroll layer contents to reduce the number of repaints while scrolling.
|
|
if ((!context.options.contains(VisibleRectContextOption::ApplyCompositedClips) && usesCompositedScrolling())
|
|
|| (!context.options.contains(VisibleRectContextOption::ApplyContainerClip) && this == container)) {
|
|
flipForWritingMode(rect);
|
|
return true;
|
|
}
|
|
|
|
// height() is inaccurate if we're in the middle of a layout of this RenderBox, so use the
|
|
// layer's size instead. Even if the layer's size is wrong, the layer itself will repaint
|
|
// anyway if its size does change.
|
|
LayoutRect clipRect(LayoutPoint(), cachedSizeForOverflowClip());
|
|
bool intersects;
|
|
if (context.options.contains(VisibleRectContextOption::UseEdgeInclusiveIntersection))
|
|
intersects = rect.edgeInclusiveIntersect(clipRect);
|
|
else {
|
|
rect.intersect(clipRect);
|
|
intersects = !rect.isEmpty();
|
|
}
|
|
flipForWritingMode(rect);
|
|
return intersects;
|
|
}
|
|
|
|
void RenderBox::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
|
|
{
|
|
minLogicalWidth = minPreferredLogicalWidth() - borderAndPaddingLogicalWidth();
|
|
maxLogicalWidth = maxPreferredLogicalWidth() - borderAndPaddingLogicalWidth();
|
|
}
|
|
|
|
LayoutUnit RenderBox::minPreferredLogicalWidth() const
|
|
{
|
|
if (preferredLogicalWidthsDirty()) {
|
|
SetLayoutNeededForbiddenScope layoutForbiddenScope(*this);
|
|
const_cast<RenderBox&>(*this).computePreferredLogicalWidths();
|
|
}
|
|
return m_minPreferredLogicalWidth;
|
|
}
|
|
|
|
LayoutUnit RenderBox::maxPreferredLogicalWidth() const
|
|
{
|
|
if (preferredLogicalWidthsDirty()) {
|
|
SetLayoutNeededForbiddenScope layoutForbiddenScope(*this);
|
|
const_cast<RenderBox&>(*this).computePreferredLogicalWidths();
|
|
}
|
|
return m_maxPreferredLogicalWidth;
|
|
}
|
|
|
|
bool RenderBox::hasOverridingLogicalHeight() const
|
|
{
|
|
return gOverridingLogicalHeightMap && gOverridingLogicalHeightMap->contains(this);
|
|
}
|
|
|
|
bool RenderBox::hasOverridingLogicalWidth() const
|
|
{
|
|
return gOverridingLogicalWidthMap && gOverridingLogicalWidthMap->contains(this);
|
|
}
|
|
|
|
void RenderBox::setOverridingLogicalHeight(LayoutUnit height)
|
|
{
|
|
if (!gOverridingLogicalHeightMap)
|
|
gOverridingLogicalHeightMap = new OverrideSizeMap();
|
|
gOverridingLogicalHeightMap->set(this, height);
|
|
}
|
|
|
|
void RenderBox::setOverridingLogicalWidth(LayoutUnit width)
|
|
{
|
|
if (!gOverridingLogicalWidthMap)
|
|
gOverridingLogicalWidthMap = new OverrideSizeMap();
|
|
gOverridingLogicalWidthMap->set(this, width);
|
|
}
|
|
|
|
void RenderBox::clearOverridingLogicalHeight()
|
|
{
|
|
if (gOverridingLogicalHeightMap)
|
|
gOverridingLogicalHeightMap->remove(this);
|
|
}
|
|
|
|
void RenderBox::clearOverridingLogicalWidth()
|
|
{
|
|
if (gOverridingLogicalWidthMap)
|
|
gOverridingLogicalWidthMap->remove(this);
|
|
}
|
|
|
|
void RenderBox::clearOverridingContentSize()
|
|
{
|
|
clearOverridingLogicalHeight();
|
|
clearOverridingLogicalWidth();
|
|
}
|
|
|
|
LayoutUnit RenderBox::overridingLogicalWidth() const
|
|
{
|
|
ASSERT(hasOverridingLogicalWidth());
|
|
return gOverridingLogicalWidthMap->get(this);
|
|
}
|
|
|
|
LayoutUnit RenderBox::overridingLogicalHeight() const
|
|
{
|
|
ASSERT(hasOverridingLogicalHeight());
|
|
return gOverridingLogicalHeightMap->get(this);
|
|
}
|
|
|
|
std::optional<LayoutUnit> RenderBox::overridingContainingBlockContentWidth() const
|
|
{
|
|
ASSERT(hasOverridingContainingBlockContentWidth());
|
|
return containingBlock()->style().isHorizontalWritingMode()
|
|
? gOverridingContainingBlockContentLogicalWidthMap->get(this)
|
|
: gOverridingContainingBlockContentLogicalHeightMap->get(this);
|
|
}
|
|
|
|
std::optional<LayoutUnit> RenderBox::overridingContainingBlockContentHeight() const
|
|
{
|
|
ASSERT(hasOverridingContainingBlockContentHeight());
|
|
return containingBlock()->style().isHorizontalWritingMode()
|
|
? gOverridingContainingBlockContentLogicalHeightMap->get(this)
|
|
: gOverridingContainingBlockContentLogicalWidthMap->get(this);
|
|
}
|
|
|
|
bool RenderBox::hasOverridingContainingBlockContentWidth() const
|
|
{
|
|
RenderBlock* cb = containingBlock();
|
|
if (!cb)
|
|
return false;
|
|
|
|
return cb->style().isHorizontalWritingMode()
|
|
? gOverridingContainingBlockContentLogicalWidthMap && gOverridingContainingBlockContentLogicalWidthMap->contains(this)
|
|
: gOverridingContainingBlockContentLogicalHeightMap && gOverridingContainingBlockContentLogicalHeightMap->contains(this);
|
|
}
|
|
|
|
bool RenderBox::hasOverridingContainingBlockContentHeight() const
|
|
{
|
|
RenderBlock* cb = containingBlock();
|
|
if (!cb)
|
|
return false;
|
|
|
|
return cb->style().isHorizontalWritingMode()
|
|
? gOverridingContainingBlockContentLogicalHeightMap && gOverridingContainingBlockContentLogicalHeightMap->contains(this)
|
|
: gOverridingContainingBlockContentLogicalWidthMap && gOverridingContainingBlockContentLogicalWidthMap->contains(this);
|
|
}
|
|
|
|
std::optional<LayoutUnit> RenderBox::overridingContainingBlockContentLogicalWidth() const
|
|
{
|
|
ASSERT(hasOverridingContainingBlockContentLogicalWidth());
|
|
return gOverridingContainingBlockContentLogicalWidthMap->get(this);
|
|
}
|
|
|
|
std::optional<LayoutUnit> RenderBox::overridingContainingBlockContentLogicalHeight() const
|
|
{
|
|
ASSERT(hasOverridingContainingBlockContentLogicalHeight());
|
|
return gOverridingContainingBlockContentLogicalHeightMap->get(this);
|
|
}
|
|
|
|
bool RenderBox::hasOverridingContainingBlockContentLogicalWidth() const
|
|
{
|
|
return gOverridingContainingBlockContentLogicalWidthMap && gOverridingContainingBlockContentLogicalWidthMap->contains(this);
|
|
}
|
|
|
|
bool RenderBox::hasOverridingContainingBlockContentLogicalHeight() const
|
|
{
|
|
return gOverridingContainingBlockContentLogicalHeightMap && gOverridingContainingBlockContentLogicalHeightMap->contains(this);
|
|
}
|
|
|
|
void RenderBox::setOverridingContainingBlockContentLogicalWidth(std::optional<LayoutUnit> logicalWidth)
|
|
{
|
|
if (!gOverridingContainingBlockContentLogicalWidthMap)
|
|
gOverridingContainingBlockContentLogicalWidthMap = new OverrideOptionalSizeMap;
|
|
gOverridingContainingBlockContentLogicalWidthMap->set(this, logicalWidth);
|
|
}
|
|
|
|
void RenderBox::setOverridingContainingBlockContentLogicalHeight(std::optional<LayoutUnit> logicalHeight)
|
|
{
|
|
if (!gOverridingContainingBlockContentLogicalHeightMap)
|
|
gOverridingContainingBlockContentLogicalHeightMap = new OverrideOptionalSizeMap;
|
|
gOverridingContainingBlockContentLogicalHeightMap->set(this, logicalHeight);
|
|
}
|
|
|
|
void RenderBox::clearOverridingContainingBlockContentSize()
|
|
{
|
|
if (gOverridingContainingBlockContentLogicalWidthMap)
|
|
gOverridingContainingBlockContentLogicalWidthMap->remove(this);
|
|
clearOverridingContainingBlockContentLogicalHeight();
|
|
}
|
|
|
|
void RenderBox::clearOverridingContainingBlockContentLogicalHeight()
|
|
{
|
|
if (gOverridingContainingBlockContentLogicalHeightMap)
|
|
gOverridingContainingBlockContentLogicalHeightMap->remove(this);
|
|
}
|
|
|
|
LayoutUnit RenderBox::adjustBorderBoxLogicalWidthForBoxSizing(const Length& logicalWidth) const
|
|
{
|
|
auto width = LayoutUnit { logicalWidth.value() };
|
|
LayoutUnit bordersPlusPadding = borderAndPaddingLogicalWidth();
|
|
if (style().boxSizing() == BoxSizing::ContentBox || logicalWidth.isIntrinsicOrAuto())
|
|
return width + bordersPlusPadding;
|
|
return std::max(width, bordersPlusPadding);
|
|
}
|
|
|
|
LayoutUnit RenderBox::adjustBorderBoxLogicalWidthForBoxSizing(LayoutUnit computedLogicalWidth, LengthType originalType) const
|
|
{
|
|
if (originalType == LengthType::Calculated)
|
|
return adjustBorderBoxLogicalWidthForBoxSizing({ computedLogicalWidth, LengthType::Fixed, false });
|
|
return adjustBorderBoxLogicalWidthForBoxSizing({ computedLogicalWidth, originalType, false });
|
|
}
|
|
|
|
LayoutUnit RenderBox::adjustBorderBoxLogicalHeightForBoxSizing(LayoutUnit height) const
|
|
{
|
|
LayoutUnit bordersPlusPadding = borderAndPaddingLogicalHeight();
|
|
if (style().boxSizing() == BoxSizing::ContentBox)
|
|
return height + bordersPlusPadding;
|
|
return std::max(height, bordersPlusPadding);
|
|
}
|
|
|
|
LayoutUnit RenderBox::adjustContentBoxLogicalWidthForBoxSizing(const Length& logicalWidth) const
|
|
{
|
|
auto width = LayoutUnit { logicalWidth.value() };
|
|
if (style().boxSizing() == BoxSizing::ContentBox || logicalWidth.isIntrinsicOrAuto())
|
|
return std::max(0_lu, width);
|
|
return std::max(0_lu, width - borderAndPaddingLogicalWidth());
|
|
}
|
|
|
|
LayoutUnit RenderBox::adjustContentBoxLogicalWidthForBoxSizing(LayoutUnit computedLogicalWidth, LengthType originalType) const
|
|
{
|
|
if (originalType == LengthType::Calculated)
|
|
return adjustContentBoxLogicalWidthForBoxSizing({ computedLogicalWidth, LengthType::Fixed, false });
|
|
return adjustContentBoxLogicalWidthForBoxSizing({ computedLogicalWidth, originalType, false });
|
|
}
|
|
|
|
LayoutUnit RenderBox::adjustContentBoxLogicalHeightForBoxSizing(std::optional<LayoutUnit> height) const
|
|
{
|
|
if (!height)
|
|
return 0;
|
|
LayoutUnit result = height.value();
|
|
if (style().boxSizing() == BoxSizing::BorderBox)
|
|
result -= borderAndPaddingLogicalHeight();
|
|
return std::max(0_lu, result);
|
|
}
|
|
|
|
// Hit Testing
|
|
bool RenderBox::hitTestVisualOverflow(const HitTestLocation& hitTestLocation, const LayoutPoint& accumulatedOffset) const
|
|
{
|
|
if (isRenderView())
|
|
return true;
|
|
|
|
LayoutPoint adjustedLocation = accumulatedOffset + location();
|
|
LayoutRect overflowBox = visualOverflowRect();
|
|
flipForWritingMode(overflowBox);
|
|
overflowBox.moveBy(adjustedLocation);
|
|
return hitTestLocation.intersects(overflowBox);
|
|
}
|
|
|
|
bool RenderBox::hitTestClipPath(const HitTestLocation& hitTestLocation, const LayoutPoint& accumulatedOffset) const
|
|
{
|
|
if (!style().clipPath())
|
|
return true;
|
|
|
|
auto offsetFromHitTestRoot = toLayoutSize(accumulatedOffset + location());
|
|
auto hitTestLocationInLocalCoordinates = hitTestLocation.point() - offsetFromHitTestRoot;
|
|
switch (style().clipPath()->type()) {
|
|
case ClipPathOperation::Shape: {
|
|
auto& clipPath = downcast<ShapeClipPathOperation>(*style().clipPath());
|
|
auto referenceBoxRect = referenceBox(clipPath.referenceBox());
|
|
if (!clipPath.pathForReferenceRect(referenceBoxRect).contains(hitTestLocationInLocalCoordinates, clipPath.windRule()))
|
|
return false;
|
|
break;
|
|
}
|
|
case ClipPathOperation::Reference: {
|
|
const auto& referenceClipPathOperation = downcast<ReferenceClipPathOperation>(*style().clipPath());
|
|
auto* element = document().getElementById(referenceClipPathOperation.fragment());
|
|
if (!element || !element->renderer())
|
|
break;
|
|
if (!is<SVGClipPathElement>(*element))
|
|
break;
|
|
auto& clipper = downcast<RenderSVGResourceClipper>(*element->renderer());
|
|
if (!clipper.hitTestClipContent(FloatRect(borderBoxRect()), FloatPoint { hitTestLocationInLocalCoordinates }))
|
|
return false;
|
|
break;
|
|
}
|
|
case ClipPathOperation::Box:
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool RenderBox::hitTestBorderRadius(const HitTestLocation& hitTestLocation, const LayoutPoint& accumulatedOffset) const
|
|
{
|
|
if (isRenderView() || !style().hasBorderRadius())
|
|
return true;
|
|
|
|
LayoutPoint adjustedLocation = accumulatedOffset + location();
|
|
LayoutRect borderRect = borderBoxRect();
|
|
borderRect.moveBy(adjustedLocation);
|
|
RoundedRect border = style().getRoundedBorderFor(borderRect);
|
|
return hitTestLocation.intersects(border);
|
|
}
|
|
|
|
bool RenderBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction action)
|
|
{
|
|
LayoutPoint adjustedLocation = accumulatedOffset + location();
|
|
|
|
// Check kids first.
|
|
for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {
|
|
if (!child->hasLayer() && child->nodeAtPoint(request, result, locationInContainer, adjustedLocation, action)) {
|
|
updateHitTestResult(result, locationInContainer.point() - toLayoutSize(adjustedLocation));
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// Check our bounds next. For this purpose always assume that we can only be hit in the
|
|
// foreground phase (which is true for replaced elements like images).
|
|
LayoutRect boundsRect = borderBoxRectInFragment(nullptr);
|
|
boundsRect.moveBy(adjustedLocation);
|
|
if (visibleToHitTesting(request) && action == HitTestForeground && locationInContainer.intersects(boundsRect)) {
|
|
if (!hitTestVisualOverflow(locationInContainer, accumulatedOffset))
|
|
return false;
|
|
|
|
if (!hitTestClipPath(locationInContainer, accumulatedOffset))
|
|
return false;
|
|
|
|
if (!hitTestBorderRadius(locationInContainer, accumulatedOffset))
|
|
return false;
|
|
|
|
updateHitTestResult(result, locationInContainer.point() - toLayoutSize(adjustedLocation));
|
|
if (result.addNodeToListBasedTestResult(nodeForHitTest(), request, locationInContainer, boundsRect) == HitTestProgress::Stop)
|
|
return true;
|
|
}
|
|
|
|
return RenderBoxModelObject::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, action);
|
|
}
|
|
|
|
// --------------------- painting stuff -------------------------------
|
|
|
|
void RenderBox::paintRootBoxFillLayers(const PaintInfo& paintInfo)
|
|
{
|
|
ASSERT(isDocumentElementRenderer());
|
|
if (paintInfo.skipRootBackground())
|
|
return;
|
|
|
|
auto* rootBackgroundRenderer = view().rendererForRootBackground();
|
|
if (!rootBackgroundRenderer)
|
|
return;
|
|
|
|
auto& style = rootBackgroundRenderer->style();
|
|
auto color = style.visitedDependentColor(CSSPropertyBackgroundColor);
|
|
auto compositeOp = document().compositeOperatorForBackgroundColor(color, *this);
|
|
|
|
paintFillLayers(paintInfo, style.colorByApplyingColorFilter(color), style.backgroundLayers(), view().backgroundRect(), BackgroundBleedNone, compositeOp, rootBackgroundRenderer);
|
|
}
|
|
|
|
BackgroundBleedAvoidance RenderBox::determineBackgroundBleedAvoidance(GraphicsContext& context) const
|
|
{
|
|
if (context.paintingDisabled())
|
|
return BackgroundBleedNone;
|
|
|
|
const RenderStyle& style = this->style();
|
|
|
|
if (!style.hasBackground() || !style.hasBorder() || !style.hasBorderRadius() || borderImageIsLoadedAndCanBeRendered())
|
|
return BackgroundBleedNone;
|
|
|
|
AffineTransform ctm = context.getCTM();
|
|
FloatSize contextScaling(static_cast<float>(ctm.xScale()), static_cast<float>(ctm.yScale()));
|
|
|
|
// Because RoundedRect uses IntRect internally the inset applied by the
|
|
// BackgroundBleedShrinkBackground strategy cannot be less than one integer
|
|
// layout coordinate, even with subpixel layout enabled. To take that into
|
|
// account, we clamp the contextScaling to 1.0 for the following test so
|
|
// that borderObscuresBackgroundEdge can only return true if the border
|
|
// widths are greater than 2 in both layout coordinates and screen
|
|
// coordinates.
|
|
// This precaution will become obsolete if RoundedRect is ever promoted to
|
|
// a sub-pixel representation.
|
|
if (contextScaling.width() > 1)
|
|
contextScaling.setWidth(1);
|
|
if (contextScaling.height() > 1)
|
|
contextScaling.setHeight(1);
|
|
|
|
if (borderObscuresBackgroundEdge(contextScaling))
|
|
return BackgroundBleedShrinkBackground;
|
|
if (!style.hasAppearance() && borderObscuresBackground() && backgroundHasOpaqueTopLayer())
|
|
return BackgroundBleedBackgroundOverBorder;
|
|
|
|
return BackgroundBleedUseTransparencyLayer;
|
|
}
|
|
|
|
void RenderBox::paintBoxDecorations(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
|
|
{
|
|
if (!paintInfo.shouldPaintWithinRoot(*this))
|
|
return;
|
|
|
|
LayoutRect paintRect = borderBoxRectInFragment(nullptr);
|
|
paintRect.moveBy(paintOffset);
|
|
adjustBorderBoxRectForPainting(paintRect);
|
|
|
|
paintRect = theme().adjustedPaintRect(*this, paintRect);
|
|
BackgroundBleedAvoidance bleedAvoidance = determineBackgroundBleedAvoidance(paintInfo.context());
|
|
|
|
// FIXME: Should eventually give the theme control over whether the box shadow should paint, since controls could have
|
|
// custom shadows of their own.
|
|
if (!boxShadowShouldBeAppliedToBackground(paintRect.location(), bleedAvoidance))
|
|
paintBoxShadow(paintInfo, paintRect, style(), ShadowStyle::Normal);
|
|
|
|
GraphicsContextStateSaver stateSaver(paintInfo.context(), false);
|
|
if (bleedAvoidance == BackgroundBleedUseTransparencyLayer) {
|
|
// To avoid the background color bleeding out behind the border, we'll render background and border
|
|
// into a transparency layer, and then clip that in one go (which requires setting up the clip before
|
|
// beginning the layer).
|
|
stateSaver.save();
|
|
paintInfo.context().clipRoundedRect(style().getRoundedBorderFor(paintRect).pixelSnappedRoundedRectForPainting(document().deviceScaleFactor()));
|
|
paintInfo.context().beginTransparencyLayer(1);
|
|
}
|
|
|
|
// If we have a native theme appearance, paint that before painting our background.
|
|
// The theme will tell us whether or not we should also paint the CSS background.
|
|
bool borderOrBackgroundPaintingIsNeeded = true;
|
|
if (style().hasAppearance()) {
|
|
ControlStates* controlStates = controlStatesForRenderer(*this);
|
|
borderOrBackgroundPaintingIsNeeded = theme().paint(*this, *controlStates, paintInfo, paintRect);
|
|
if (controlStates->needsRepaint())
|
|
view().scheduleLazyRepaint(*this);
|
|
}
|
|
|
|
if (borderOrBackgroundPaintingIsNeeded) {
|
|
if (bleedAvoidance == BackgroundBleedBackgroundOverBorder)
|
|
paintBorder(paintInfo, paintRect, style(), bleedAvoidance);
|
|
|
|
paintBackground(paintInfo, paintRect, bleedAvoidance);
|
|
|
|
if (style().hasAppearance())
|
|
theme().paintDecorations(*this, paintInfo, paintRect);
|
|
}
|
|
paintBoxShadow(paintInfo, paintRect, style(), ShadowStyle::Inset);
|
|
|
|
// The theme will tell us whether or not we should also paint the CSS border.
|
|
if (bleedAvoidance != BackgroundBleedBackgroundOverBorder && (!style().hasAppearance() || (borderOrBackgroundPaintingIsNeeded && theme().paintBorderOnly(*this, paintInfo, paintRect))) && style().hasVisibleBorderDecoration())
|
|
paintBorder(paintInfo, paintRect, style(), bleedAvoidance);
|
|
|
|
if (bleedAvoidance == BackgroundBleedUseTransparencyLayer)
|
|
paintInfo.context().endTransparencyLayer();
|
|
}
|
|
|
|
bool RenderBox::paintsOwnBackground() const
|
|
{
|
|
if (isBody()) {
|
|
// The <body> only paints its background if the root element has defined a background independent of the body,
|
|
// or if the <body>'s parent is not the document element's renderer (e.g. inside SVG foreignObject).
|
|
auto documentElementRenderer = document().documentElement()->renderer();
|
|
return !documentElementRenderer
|
|
|| documentElementRenderer->hasBackground()
|
|
|| (documentElementRenderer != parent());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void RenderBox::paintBackground(const PaintInfo& paintInfo, const LayoutRect& paintRect, BackgroundBleedAvoidance bleedAvoidance)
|
|
{
|
|
if (isDocumentElementRenderer()) {
|
|
paintRootBoxFillLayers(paintInfo);
|
|
return;
|
|
}
|
|
|
|
if (!paintsOwnBackground())
|
|
return;
|
|
|
|
if (backgroundIsKnownToBeObscured(paintRect.location()) && !boxShadowShouldBeAppliedToBackground(paintRect.location(), bleedAvoidance))
|
|
return;
|
|
|
|
auto backgroundColor = style().visitedDependentColor(CSSPropertyBackgroundColor);
|
|
auto compositeOp = document().compositeOperatorForBackgroundColor(backgroundColor, *this);
|
|
|
|
paintFillLayers(paintInfo, style().colorByApplyingColorFilter(backgroundColor), style().backgroundLayers(), paintRect, bleedAvoidance, compositeOp);
|
|
}
|
|
|
|
bool RenderBox::getBackgroundPaintedExtent(const LayoutPoint& paintOffset, LayoutRect& paintedExtent) const
|
|
{
|
|
ASSERT(hasBackground());
|
|
LayoutRect backgroundRect = snappedIntRect(borderBoxRect());
|
|
|
|
Color backgroundColor = style().visitedDependentColorWithColorFilter(CSSPropertyBackgroundColor);
|
|
if (backgroundColor.isVisible()) {
|
|
paintedExtent = backgroundRect;
|
|
return true;
|
|
}
|
|
|
|
auto& layers = style().backgroundLayers();
|
|
if (!layers.image() || layers.next()) {
|
|
paintedExtent = backgroundRect;
|
|
return true;
|
|
}
|
|
|
|
auto geometry = calculateBackgroundImageGeometry(nullptr, layers, paintOffset, backgroundRect);
|
|
paintedExtent = geometry.destRect();
|
|
return !geometry.hasNonLocalGeometry();
|
|
}
|
|
|
|
bool RenderBox::backgroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect) const
|
|
{
|
|
if (!paintsOwnBackground())
|
|
return false;
|
|
|
|
Color backgroundColor = style().visitedDependentColorWithColorFilter(CSSPropertyBackgroundColor);
|
|
if (!backgroundColor.isOpaque())
|
|
return false;
|
|
|
|
// If the element has appearance, it might be painted by theme.
|
|
// We cannot be sure if theme paints the background opaque.
|
|
// In this case it is safe to not assume opaqueness.
|
|
// FIXME: May be ask theme if it paints opaque.
|
|
if (style().hasAppearance())
|
|
return false;
|
|
// FIXME: Check the opaqueness of background images.
|
|
|
|
if (hasClip() || hasClipPath())
|
|
return false;
|
|
|
|
// FIXME: Use rounded rect if border radius is present.
|
|
if (style().hasBorderRadius())
|
|
return false;
|
|
|
|
// FIXME: The background color clip is defined by the last layer.
|
|
if (style().backgroundLayers().next())
|
|
return false;
|
|
LayoutRect backgroundRect;
|
|
switch (style().backgroundClip()) {
|
|
case FillBox::Border:
|
|
backgroundRect = borderBoxRect();
|
|
break;
|
|
case FillBox::Padding:
|
|
backgroundRect = paddingBoxRect();
|
|
break;
|
|
case FillBox::Content:
|
|
backgroundRect = contentBoxRect();
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return backgroundRect.contains(localRect);
|
|
}
|
|
|
|
static bool isCandidateForOpaquenessTest(const RenderBox& childBox)
|
|
{
|
|
const RenderStyle& childStyle = childBox.style();
|
|
if (childStyle.position() != PositionType::Static && childBox.containingBlock() != childBox.parent())
|
|
return false;
|
|
if (childStyle.visibility() != Visibility::Visible)
|
|
return false;
|
|
if (childStyle.shapeOutside())
|
|
return false;
|
|
if (!childBox.width() || !childBox.height())
|
|
return false;
|
|
if (RenderLayer* childLayer = childBox.layer()) {
|
|
if (childLayer->isComposited())
|
|
return false;
|
|
// FIXME: Deal with z-index.
|
|
if (!childStyle.hasAutoUsedZIndex())
|
|
return false;
|
|
if (childLayer->hasTransform() || childLayer->isTransparent() || childLayer->hasFilter())
|
|
return false;
|
|
if (!childBox.scrollPosition().isZero())
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool RenderBox::foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const
|
|
{
|
|
if (!maxDepthToTest)
|
|
return false;
|
|
|
|
for (auto& childBox : childrenOfType<RenderBox>(*this)) {
|
|
if (!isCandidateForOpaquenessTest(childBox))
|
|
continue;
|
|
LayoutPoint childLocation = childBox.location();
|
|
if (childBox.isRelativelyPositioned())
|
|
childLocation.move(childBox.relativePositionOffset());
|
|
LayoutRect childLocalRect = localRect;
|
|
childLocalRect.moveBy(-childLocation);
|
|
if (childLocalRect.y() < 0 || childLocalRect.x() < 0) {
|
|
// If there is unobscured area above/left of a static positioned box then the rect is probably not covered.
|
|
if (childBox.style().position() == PositionType::Static)
|
|
return false;
|
|
continue;
|
|
}
|
|
if (childLocalRect.maxY() > childBox.height() || childLocalRect.maxX() > childBox.width())
|
|
continue;
|
|
if (childBox.backgroundIsKnownToBeOpaqueInRect(childLocalRect))
|
|
return true;
|
|
if (childBox.foregroundIsKnownToBeOpaqueInRect(childLocalRect, maxDepthToTest - 1))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool RenderBox::computeBackgroundIsKnownToBeObscured(const LayoutPoint& paintOffset)
|
|
{
|
|
// Test to see if the children trivially obscure the background.
|
|
// FIXME: This test can be much more comprehensive.
|
|
if (!hasBackground())
|
|
return false;
|
|
// Table and root background painting is special.
|
|
if (isTable() || isDocumentElementRenderer())
|
|
return false;
|
|
|
|
LayoutRect backgroundRect;
|
|
if (!getBackgroundPaintedExtent(paintOffset, backgroundRect))
|
|
return false;
|
|
|
|
if (auto* scrollableArea = layer() ? layer()->scrollableArea() : nullptr) {
|
|
if (scrollableArea->scrollingMayRevealBackground())
|
|
return false;
|
|
}
|
|
return foregroundIsKnownToBeOpaqueInRect(backgroundRect, backgroundObscurationTestMaxDepth);
|
|
}
|
|
|
|
bool RenderBox::backgroundHasOpaqueTopLayer() const
|
|
{
|
|
auto& fillLayer = style().backgroundLayers();
|
|
if (fillLayer.clip() != FillBox::Border)
|
|
return false;
|
|
|
|
// Clipped with local scrolling
|
|
if (hasNonVisibleOverflow() && fillLayer.attachment() == FillAttachment::LocalBackground)
|
|
return false;
|
|
|
|
if (fillLayer.hasOpaqueImage(*this) && fillLayer.hasRepeatXY() && fillLayer.image()->canRender(this, style().effectiveZoom()))
|
|
return true;
|
|
|
|
// If there is only one layer and no image, check whether the background color is opaque.
|
|
if (!fillLayer.next() && !fillLayer.hasImage()) {
|
|
Color bgColor = style().visitedDependentColorWithColorFilter(CSSPropertyBackgroundColor);
|
|
if (bgColor.isOpaque())
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void RenderBox::paintMask(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
|
|
{
|
|
if (!paintInfo.shouldPaintWithinRoot(*this) || style().visibility() != Visibility::Visible || paintInfo.phase != PaintPhase::Mask || paintInfo.context().paintingDisabled())
|
|
return;
|
|
|
|
LayoutRect paintRect = LayoutRect(paintOffset, size());
|
|
adjustBorderBoxRectForPainting(paintRect);
|
|
paintMaskImages(paintInfo, paintRect);
|
|
}
|
|
|
|
void RenderBox::paintClippingMask(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
|
|
{
|
|
if (!paintInfo.shouldPaintWithinRoot(*this) || style().visibility() != Visibility::Visible || paintInfo.phase != PaintPhase::ClippingMask || paintInfo.context().paintingDisabled())
|
|
return;
|
|
|
|
LayoutRect paintRect = LayoutRect(paintOffset, size());
|
|
paintInfo.context().fillRect(snappedIntRect(paintRect), Color::black);
|
|
}
|
|
|
|
void RenderBox::paintMaskImages(const PaintInfo& paintInfo, const LayoutRect& paintRect)
|
|
{
|
|
// Figure out if we need to push a transparency layer to render our mask.
|
|
bool pushTransparencyLayer = false;
|
|
bool compositedMask = hasLayer() && layer()->hasCompositedMask();
|
|
bool flattenCompositingLayers = paintInfo.paintBehavior.contains(PaintBehavior::FlattenCompositingLayers);
|
|
CompositeOperator compositeOp = CompositeOperator::SourceOver;
|
|
|
|
bool allMaskImagesLoaded = true;
|
|
|
|
if (!compositedMask || flattenCompositingLayers) {
|
|
pushTransparencyLayer = true;
|
|
|
|
// Don't render a masked element until all the mask images have loaded, to prevent a flash of unmasked content.
|
|
if (auto* maskBoxImage = style().maskBoxImage().image())
|
|
allMaskImagesLoaded &= maskBoxImage->isLoaded();
|
|
|
|
allMaskImagesLoaded &= style().maskLayers().imagesAreLoaded();
|
|
|
|
paintInfo.context().setCompositeOperation(CompositeOperator::DestinationIn);
|
|
paintInfo.context().beginTransparencyLayer(1);
|
|
compositeOp = CompositeOperator::SourceOver;
|
|
}
|
|
|
|
if (allMaskImagesLoaded) {
|
|
paintFillLayers(paintInfo, Color(), style().maskLayers(), paintRect, BackgroundBleedNone, compositeOp);
|
|
paintNinePieceImage(paintInfo.context(), paintRect, style(), style().maskBoxImage(), compositeOp);
|
|
}
|
|
|
|
if (pushTransparencyLayer)
|
|
paintInfo.context().endTransparencyLayer();
|
|
}
|
|
|
|
LayoutRect RenderBox::maskClipRect(const LayoutPoint& paintOffset)
|
|
{
|
|
const NinePieceImage& maskBoxImage = style().maskBoxImage();
|
|
if (maskBoxImage.image()) {
|
|
LayoutRect borderImageRect = borderBoxRect();
|
|
|
|
// Apply outsets to the border box.
|
|
borderImageRect.expand(style().maskBoxImageOutsets());
|
|
return borderImageRect;
|
|
}
|
|
|
|
LayoutRect result;
|
|
LayoutRect borderBox = borderBoxRect();
|
|
for (auto* maskLayer = &style().maskLayers(); maskLayer; maskLayer = maskLayer->next()) {
|
|
if (maskLayer->image()) {
|
|
// Masks should never have fixed attachment, so it's OK for paintContainer to be null.
|
|
result.unite(calculateBackgroundImageGeometry(nullptr, *maskLayer, paintOffset, borderBox).destRect());
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void RenderBox::paintFillLayers(const PaintInfo& paintInfo, const Color& color, const FillLayer& fillLayer, const LayoutRect& rect,
|
|
BackgroundBleedAvoidance bleedAvoidance, CompositeOperator op, RenderElement* backgroundObject)
|
|
{
|
|
Vector<const FillLayer*, 8> layers;
|
|
bool shouldDrawBackgroundInSeparateBuffer = false;
|
|
|
|
for (auto* layer = &fillLayer; layer; layer = layer->next()) {
|
|
layers.append(layer);
|
|
|
|
if (layer->blendMode() != BlendMode::Normal)
|
|
shouldDrawBackgroundInSeparateBuffer = true;
|
|
|
|
// Stop traversal when an opaque layer is encountered.
|
|
// FIXME: It would be possible for the following occlusion culling test to be more aggressive
|
|
// on layers with no repeat by testing whether the image covers the layout rect.
|
|
// Testing that here would imply duplicating a lot of calculations that are currently done in
|
|
// RenderBoxModelObject::paintFillLayerExtended. A more efficient solution might be to move
|
|
// the layer recursion into paintFillLayerExtended, or to compute the layer geometry here
|
|
// and pass it down.
|
|
|
|
// The clipOccludesNextLayers condition must be evaluated first to avoid short-circuiting.
|
|
if (layer->clipOccludesNextLayers(layer == &fillLayer) && layer->hasOpaqueImage(*this) && layer->image()->canRender(this, style().effectiveZoom()) && layer->hasRepeatXY() && layer->blendMode() == BlendMode::Normal)
|
|
break;
|
|
}
|
|
|
|
auto& context = paintInfo.context();
|
|
auto baseBgColorUsage = BaseBackgroundColorUse;
|
|
|
|
if (shouldDrawBackgroundInSeparateBuffer) {
|
|
paintFillLayer(paintInfo, color, *layers.last(), rect, bleedAvoidance, op, backgroundObject, BaseBackgroundColorOnly);
|
|
baseBgColorUsage = BaseBackgroundColorSkip;
|
|
context.beginTransparencyLayer(1);
|
|
}
|
|
|
|
auto topLayer = layers.rend();
|
|
for (auto it = layers.rbegin(); it != topLayer; ++it)
|
|
paintFillLayer(paintInfo, color, **it, rect, bleedAvoidance, op, backgroundObject, baseBgColorUsage);
|
|
|
|
if (shouldDrawBackgroundInSeparateBuffer)
|
|
context.endTransparencyLayer();
|
|
}
|
|
|
|
void RenderBox::paintFillLayer(const PaintInfo& paintInfo, const Color& c, const FillLayer& fillLayer, const LayoutRect& rect,
|
|
BackgroundBleedAvoidance bleedAvoidance, CompositeOperator op, RenderElement* backgroundObject, BaseBackgroundColorUsage baseBgColorUsage)
|
|
{
|
|
paintFillLayerExtended(paintInfo, c, fillLayer, rect, bleedAvoidance, nullptr, LayoutSize(), op, backgroundObject, baseBgColorUsage);
|
|
}
|
|
|
|
static StyleImage* findLayerUsedImage(WrappedImagePtr image, const FillLayer& layers)
|
|
{
|
|
for (auto* layer = &layers; layer; layer = layer->next()) {
|
|
if (layer->image() && image == layer->image()->data())
|
|
return layer->image();
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void RenderBox::imageChanged(WrappedImagePtr image, const IntRect*)
|
|
{
|
|
if (!parent())
|
|
return;
|
|
|
|
if ((style().borderImage().image() && style().borderImage().image()->data() == image) ||
|
|
(style().maskBoxImage().image() && style().maskBoxImage().image()->data() == image)) {
|
|
repaint();
|
|
return;
|
|
}
|
|
|
|
ShapeValue* shapeOutsideValue = style().shapeOutside();
|
|
if (!view().frameView().layoutContext().isInRenderTreeLayout() && isFloating() && shapeOutsideValue && shapeOutsideValue->image() && shapeOutsideValue->image()->data() == image) {
|
|
ShapeOutsideInfo::ensureInfo(*this).markShapeAsDirty();
|
|
markShapeOutsideDependentsForLayout();
|
|
}
|
|
|
|
bool didFullRepaint = repaintLayerRectsForImage(image, style().backgroundLayers(), true);
|
|
if (!didFullRepaint)
|
|
repaintLayerRectsForImage(image, style().maskLayers(), false);
|
|
|
|
if (!isComposited())
|
|
return;
|
|
|
|
if (layer()->hasCompositedMask() && findLayerUsedImage(image, style().maskLayers()))
|
|
layer()->contentChanged(MaskImageChanged);
|
|
|
|
if (auto* styleImage = findLayerUsedImage(image, style().backgroundLayers())) {
|
|
layer()->contentChanged(BackgroundImageChanged);
|
|
incrementVisuallyNonEmptyPixelCountIfNeeded(flooredIntSize(styleImage->imageSize(this, style().effectiveZoom())));
|
|
}
|
|
}
|
|
|
|
void RenderBox::incrementVisuallyNonEmptyPixelCountIfNeeded(const IntSize& size)
|
|
{
|
|
if (didContibuteToVisuallyNonEmptyPixelCount())
|
|
return;
|
|
|
|
view().frameView().incrementVisuallyNonEmptyPixelCount(size);
|
|
setDidContibuteToVisuallyNonEmptyPixelCount();
|
|
}
|
|
|
|
bool RenderBox::repaintLayerRectsForImage(WrappedImagePtr image, const FillLayer& layers, bool drawingBackground)
|
|
{
|
|
LayoutRect rendererRect;
|
|
RenderBox* layerRenderer = nullptr;
|
|
|
|
for (auto* layer = &layers; layer; layer = layer->next()) {
|
|
if (layer->image() && image == layer->image()->data() && (layer->image()->isLoaded() || layer->image()->canRender(this, style().effectiveZoom()))) {
|
|
// Now that we know this image is being used, compute the renderer and the rect if we haven't already.
|
|
bool drawingRootBackground = drawingBackground && (isDocumentElementRenderer() || (isBody() && !document().documentElement()->renderer()->hasBackground()));
|
|
if (!layerRenderer) {
|
|
if (drawingRootBackground) {
|
|
layerRenderer = &view();
|
|
|
|
LayoutUnit rw = downcast<RenderView>(*layerRenderer).frameView().contentsWidth();
|
|
LayoutUnit rh = downcast<RenderView>(*layerRenderer).frameView().contentsHeight();
|
|
|
|
rendererRect = LayoutRect(-layerRenderer->marginLeft(),
|
|
-layerRenderer->marginTop(),
|
|
std::max(layerRenderer->width() + layerRenderer->horizontalMarginExtent() + layerRenderer->borderLeft() + layerRenderer->borderRight(), rw),
|
|
std::max(layerRenderer->height() + layerRenderer->verticalMarginExtent() + layerRenderer->borderTop() + layerRenderer->borderBottom(), rh));
|
|
} else {
|
|
layerRenderer = this;
|
|
rendererRect = borderBoxRect();
|
|
}
|
|
}
|
|
// FIXME: Figure out how to pass absolute position to calculateBackgroundImageGeometry (for pixel snapping)
|
|
BackgroundImageGeometry geometry = layerRenderer->calculateBackgroundImageGeometry(nullptr, *layer, LayoutPoint(), rendererRect);
|
|
if (geometry.hasNonLocalGeometry()) {
|
|
// Rather than incur the costs of computing the paintContainer for renderers with fixed backgrounds
|
|
// in order to get the right destRect, just repaint the entire renderer.
|
|
layerRenderer->repaint();
|
|
return true;
|
|
}
|
|
|
|
LayoutRect rectToRepaint = geometry.destRect();
|
|
bool shouldClipToLayer = true;
|
|
|
|
// If this is the root background layer, we may need to extend the repaintRect if the FrameView has an
|
|
// extendedBackground. We should only extend the rect if it is already extending the full width or height
|
|
// of the rendererRect.
|
|
if (drawingRootBackground && view().frameView().hasExtendedBackgroundRectForPainting()) {
|
|
shouldClipToLayer = false;
|
|
IntRect extendedBackgroundRect = view().frameView().extendedBackgroundRectForPainting();
|
|
if (rectToRepaint.width() == rendererRect.width()) {
|
|
rectToRepaint.move(extendedBackgroundRect.x(), 0);
|
|
rectToRepaint.setWidth(extendedBackgroundRect.width());
|
|
}
|
|
if (rectToRepaint.height() == rendererRect.height()) {
|
|
rectToRepaint.move(0, extendedBackgroundRect.y());
|
|
rectToRepaint.setHeight(extendedBackgroundRect.height());
|
|
}
|
|
}
|
|
|
|
layerRenderer->repaintRectangle(rectToRepaint, shouldClipToLayer);
|
|
if (geometry.destRect() == rendererRect)
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool RenderBox::pushContentsClip(PaintInfo& paintInfo, const LayoutPoint& accumulatedOffset)
|
|
{
|
|
if (paintInfo.phase == PaintPhase::BlockBackground || paintInfo.phase == PaintPhase::SelfOutline || paintInfo.phase == PaintPhase::Mask)
|
|
return false;
|
|
|
|
bool isControlClip = hasControlClip();
|
|
bool isOverflowClip = hasNonVisibleOverflow() && !layer()->isSelfPaintingLayer();
|
|
|
|
if (!isControlClip && !isOverflowClip)
|
|
return false;
|
|
|
|
if (paintInfo.phase == PaintPhase::Outline)
|
|
paintInfo.phase = PaintPhase::ChildOutlines;
|
|
else if (paintInfo.phase == PaintPhase::ChildBlockBackground) {
|
|
paintInfo.phase = PaintPhase::BlockBackground;
|
|
paintObject(paintInfo, accumulatedOffset);
|
|
paintInfo.phase = PaintPhase::ChildBlockBackgrounds;
|
|
}
|
|
float deviceScaleFactor = document().deviceScaleFactor();
|
|
FloatRect clipRect = snapRectToDevicePixels((isControlClip ? controlClipRect(accumulatedOffset) : overflowClipRect(accumulatedOffset, nullptr, IgnoreOverlayScrollbarSize, paintInfo.phase)), deviceScaleFactor);
|
|
paintInfo.context().save();
|
|
if (style().hasBorderRadius())
|
|
paintInfo.context().clipRoundedRect(style().getRoundedInnerBorderFor(LayoutRect(accumulatedOffset, size())).pixelSnappedRoundedRectForPainting(deviceScaleFactor));
|
|
paintInfo.context().clip(clipRect);
|
|
|
|
if (paintInfo.phase == PaintPhase::EventRegion)
|
|
paintInfo.eventRegionContext->pushClip(enclosingIntRect(clipRect));
|
|
|
|
return true;
|
|
}
|
|
|
|
void RenderBox::popContentsClip(PaintInfo& paintInfo, PaintPhase originalPhase, const LayoutPoint& accumulatedOffset)
|
|
{
|
|
ASSERT(hasControlClip() || (hasNonVisibleOverflow() && !layer()->isSelfPaintingLayer()));
|
|
|
|
if (paintInfo.phase == PaintPhase::EventRegion)
|
|
paintInfo.eventRegionContext->popClip();
|
|
|
|
paintInfo.context().restore();
|
|
if (originalPhase == PaintPhase::Outline) {
|
|
paintInfo.phase = PaintPhase::SelfOutline;
|
|
paintObject(paintInfo, accumulatedOffset);
|
|
paintInfo.phase = originalPhase;
|
|
} else if (originalPhase == PaintPhase::ChildBlockBackground)
|
|
paintInfo.phase = originalPhase;
|
|
}
|
|
|
|
LayoutRect RenderBox::overflowClipRect(const LayoutPoint& location, RenderFragmentContainer* fragment, OverlayScrollbarSizeRelevancy relevancy, PaintPhase) const
|
|
{
|
|
LayoutRect clipRect = borderBoxRectInFragment(fragment);
|
|
clipRect.setLocation(location + clipRect.location() + LayoutSize(borderLeft(), borderTop()));
|
|
clipRect.setSize(clipRect.size() - LayoutSize(borderLeft() + borderRight(), borderTop() + borderBottom()));
|
|
if (style().overflowX() == Overflow::Clip && style().overflowY() == Overflow::Visible) {
|
|
LayoutRect infRect = LayoutRect::infiniteRect();
|
|
clipRect.setY(infRect.y());
|
|
clipRect.setHeight(infRect.height());
|
|
} else if (style().overflowY() == Overflow::Clip && style().overflowX() == Overflow::Visible) {
|
|
LayoutRect infRect = LayoutRect::infiniteRect();
|
|
clipRect.setX(infRect.x());
|
|
clipRect.setWidth(infRect.width());
|
|
}
|
|
|
|
// Subtract out scrollbars if we have them.
|
|
if (auto* scrollableArea = layer() ? layer()->scrollableArea() : nullptr) {
|
|
if (shouldPlaceVerticalScrollbarOnLeft())
|
|
clipRect.move(scrollableArea->verticalScrollbarWidth(relevancy), 0);
|
|
clipRect.contract(scrollableArea->verticalScrollbarWidth(relevancy), scrollableArea->horizontalScrollbarHeight(relevancy));
|
|
}
|
|
|
|
return clipRect;
|
|
}
|
|
|
|
LayoutRect RenderBox::clipRect(const LayoutPoint& location, RenderFragmentContainer* fragment) const
|
|
{
|
|
LayoutRect borderBoxRect = borderBoxRectInFragment(fragment);
|
|
LayoutRect clipRect = LayoutRect(borderBoxRect.location() + location, borderBoxRect.size());
|
|
|
|
if (!style().clipLeft().isAuto()) {
|
|
LayoutUnit c = valueForLength(style().clipLeft(), borderBoxRect.width());
|
|
clipRect.move(c, 0_lu);
|
|
clipRect.contract(c, 0_lu);
|
|
}
|
|
|
|
// We don't use the fragment-specific border box's width and height since clip offsets are (stupidly) specified
|
|
// from the left and top edges. Therefore it's better to avoid constraining to smaller widths and heights.
|
|
|
|
if (!style().clipRight().isAuto())
|
|
clipRect.contract(width() - valueForLength(style().clipRight(), width()), 0_lu);
|
|
|
|
if (!style().clipTop().isAuto()) {
|
|
LayoutUnit c = valueForLength(style().clipTop(), borderBoxRect.height());
|
|
clipRect.move(0_lu, c);
|
|
clipRect.contract(0_lu, c);
|
|
}
|
|
|
|
if (!style().clipBottom().isAuto())
|
|
clipRect.contract(0_lu, height() - valueForLength(style().clipBottom(), height()));
|
|
|
|
return clipRect;
|
|
}
|
|
|
|
LayoutUnit RenderBox::shrinkLogicalWidthToAvoidFloats(LayoutUnit childMarginStart, LayoutUnit childMarginEnd, const RenderBlock& cb, RenderFragmentContainer* fragment) const
|
|
{
|
|
RenderFragmentContainer* containingBlockFragment = nullptr;
|
|
LayoutUnit logicalTopPosition = logicalTop();
|
|
if (fragment) {
|
|
LayoutUnit offsetFromLogicalTopOfFragment = fragment ? fragment->logicalTopForFragmentedFlowContent() - offsetFromLogicalTopOfFirstPage() : 0_lu;
|
|
logicalTopPosition = std::max(logicalTopPosition, logicalTopPosition + offsetFromLogicalTopOfFragment);
|
|
containingBlockFragment = cb.clampToStartAndEndFragments(fragment);
|
|
}
|
|
|
|
LayoutUnit logicalHeight = cb.logicalHeightForChild(*this);
|
|
LayoutUnit result = cb.availableLogicalWidthForLineInFragment(logicalTopPosition, DoNotIndentText, containingBlockFragment, logicalHeight) - childMarginStart - childMarginEnd;
|
|
|
|
// We need to see if margins on either the start side or the end side can contain the floats in question. If they can,
|
|
// then just using the line width is inaccurate. In the case where a float completely fits, we don't need to use the line
|
|
// offset at all, but can instead push all the way to the content edge of the containing block. In the case where the float
|
|
// doesn't fit, we can use the line offset, but we need to grow it by the margin to reflect the fact that the margin was
|
|
// "consumed" by the float. Negative margins aren't consumed by the float, and so we ignore them.
|
|
if (childMarginStart > 0) {
|
|
LayoutUnit startContentSide = cb.startOffsetForContent(containingBlockFragment);
|
|
LayoutUnit startContentSideWithMargin = startContentSide + childMarginStart;
|
|
LayoutUnit startOffset = cb.startOffsetForLineInFragment(logicalTopPosition, DoNotIndentText, containingBlockFragment, logicalHeight);
|
|
if (startOffset > startContentSideWithMargin)
|
|
result += childMarginStart;
|
|
else
|
|
result += startOffset - startContentSide;
|
|
}
|
|
|
|
if (childMarginEnd > 0) {
|
|
LayoutUnit endContentSide = cb.endOffsetForContent(containingBlockFragment);
|
|
LayoutUnit endContentSideWithMargin = endContentSide + childMarginEnd;
|
|
LayoutUnit endOffset = cb.endOffsetForLineInFragment(logicalTopPosition, DoNotIndentText, containingBlockFragment, logicalHeight);
|
|
if (endOffset > endContentSideWithMargin)
|
|
result += childMarginEnd;
|
|
else
|
|
result += endOffset - endContentSide;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
LayoutUnit RenderBox::containingBlockLogicalWidthForContent() const
|
|
{
|
|
if (hasOverridingContainingBlockContentLogicalWidth())
|
|
return overridingContainingBlockContentLogicalWidth().value_or(0_lu);
|
|
|
|
if (RenderBlock* cb = containingBlock()) {
|
|
if (isOutOfFlowPositioned())
|
|
return cb->clientLogicalWidth();
|
|
return cb->availableLogicalWidth();
|
|
}
|
|
return 0_lu;
|
|
}
|
|
|
|
LayoutUnit RenderBox::containingBlockLogicalHeightForContent(AvailableLogicalHeightType heightType) const
|
|
{
|
|
if (hasOverridingContainingBlockContentLogicalHeight()) {
|
|
// FIXME: Containing block for a grid item is the grid area it's located in. We need to return whatever
|
|
// height value we get from overridingContainingBlockContentLogicalHeight() here, including std::nullopt.
|
|
if (auto height = overridingContainingBlockContentLogicalHeight())
|
|
return height.value();
|
|
}
|
|
|
|
if (RenderBlock* cb = containingBlock())
|
|
return cb->availableLogicalHeight(heightType);
|
|
return 0_lu;
|
|
}
|
|
|
|
LayoutUnit RenderBox::containingBlockLogicalWidthForContentInFragment(RenderFragmentContainer* fragment) const
|
|
{
|
|
if (!fragment)
|
|
return containingBlockLogicalWidthForContent();
|
|
|
|
RenderBlock* cb = containingBlock();
|
|
RenderFragmentContainer* containingBlockFragment = cb->clampToStartAndEndFragments(fragment);
|
|
// FIXME: It's unclear if a fragment's content should use the containing block's override logical width.
|
|
// If it should, the following line should call containingBlockLogicalWidthForContent.
|
|
LayoutUnit result = cb->availableLogicalWidth();
|
|
RenderBoxFragmentInfo* boxInfo = cb->renderBoxFragmentInfo(containingBlockFragment);
|
|
if (!boxInfo)
|
|
return result;
|
|
return std::max<LayoutUnit>(0, result - (cb->logicalWidth() - boxInfo->logicalWidth()));
|
|
}
|
|
|
|
LayoutUnit RenderBox::containingBlockAvailableLineWidthInFragment(RenderFragmentContainer* fragment) const
|
|
{
|
|
RenderBlock* cb = containingBlock();
|
|
RenderFragmentContainer* containingBlockFragment = nullptr;
|
|
LayoutUnit logicalTopPosition = logicalTop();
|
|
if (fragment) {
|
|
LayoutUnit offsetFromLogicalTopOfFragment = fragment ? fragment->logicalTopForFragmentedFlowContent() - offsetFromLogicalTopOfFirstPage() : 0_lu;
|
|
logicalTopPosition = std::max(logicalTopPosition, logicalTopPosition + offsetFromLogicalTopOfFragment);
|
|
containingBlockFragment = cb->clampToStartAndEndFragments(fragment);
|
|
}
|
|
return cb->availableLogicalWidthForLineInFragment(logicalTopPosition, DoNotIndentText, containingBlockFragment, availableLogicalHeight(IncludeMarginBorderPadding));
|
|
}
|
|
|
|
LayoutUnit RenderBox::perpendicularContainingBlockLogicalHeight() const
|
|
{
|
|
if (hasOverridingContainingBlockContentLogicalHeight()) {
|
|
if (auto height = overridingContainingBlockContentLogicalHeight())
|
|
return height.value();
|
|
}
|
|
|
|
RenderBlock* cb = containingBlock();
|
|
if (cb->hasOverridingLogicalHeight())
|
|
return cb->overridingContentLogicalHeight();
|
|
|
|
const RenderStyle& containingBlockStyle = cb->style();
|
|
Length logicalHeightLength = containingBlockStyle.logicalHeight();
|
|
|
|
// FIXME: For now just support fixed heights. Eventually should support percentage heights as well.
|
|
if (!logicalHeightLength.isFixed()) {
|
|
LayoutUnit fillFallbackExtent = containingBlockStyle.isHorizontalWritingMode() ? view().frameView().layoutSize().height() : view().frameView().layoutSize().width();
|
|
LayoutUnit fillAvailableExtent = containingBlock()->availableLogicalHeight(ExcludeMarginBorderPadding);
|
|
view().addPercentHeightDescendant(const_cast<RenderBox&>(*this));
|
|
// FIXME: https://bugs.webkit.org/show_bug.cgi?id=158286 We also need to perform the same percentHeightDescendant treatment to the element which dictates the return value for containingBlock()->availableLogicalHeight() above.
|
|
return std::min(fillAvailableExtent, fillFallbackExtent);
|
|
}
|
|
|
|
// Use the content box logical height as specified by the style.
|
|
return cb->adjustContentBoxLogicalHeightForBoxSizing(LayoutUnit(logicalHeightLength.value()));
|
|
}
|
|
|
|
void RenderBox::mapLocalToContainer(const RenderLayerModelObject* ancestorContainer, TransformState& transformState, OptionSet<MapCoordinatesMode> mode, bool* wasFixed) const
|
|
{
|
|
if (ancestorContainer == this)
|
|
return;
|
|
|
|
if (!ancestorContainer && view().frameView().layoutContext().isPaintOffsetCacheEnabled()) {
|
|
auto* layoutState = view().frameView().layoutContext().layoutState();
|
|
LayoutSize offset = layoutState->paintOffset() + locationOffset();
|
|
if (style().hasInFlowPosition() && layer())
|
|
offset += layer()->offsetForInFlowPosition();
|
|
transformState.move(offset);
|
|
return;
|
|
}
|
|
|
|
bool containerSkipped;
|
|
RenderElement* container = this->container(ancestorContainer, containerSkipped);
|
|
if (!container)
|
|
return;
|
|
|
|
bool isFixedPos = isFixedPositioned();
|
|
// If this box has a transform, it acts as a fixed position container for fixed descendants,
|
|
// and may itself also be fixed position. So propagate 'fixed' up only if this box is fixed position.
|
|
if (hasTransform() && !isFixedPos)
|
|
mode.remove(IsFixed);
|
|
else if (isFixedPos)
|
|
mode.add(IsFixed);
|
|
|
|
if (wasFixed)
|
|
*wasFixed = mode.contains(IsFixed);
|
|
|
|
LayoutSize containerOffset = offsetFromContainer(*container, LayoutPoint(transformState.mappedPoint()));
|
|
|
|
bool preserve3D = mode.contains(UseTransforms) && (container->style().preserves3D() || style().preserves3D());
|
|
if (mode.contains(UseTransforms) && shouldUseTransformFromContainer(container)) {
|
|
TransformationMatrix t;
|
|
getTransformFromContainer(container, containerOffset, t);
|
|
transformState.applyTransform(t, preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform);
|
|
} else
|
|
transformState.move(containerOffset.width(), containerOffset.height(), preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform);
|
|
|
|
if (containerSkipped) {
|
|
// There can't be a transform between ancestorContainer and o, because transforms create containers, so it should be safe
|
|
// to just subtract the delta between the ancestorContainer and o.
|
|
LayoutSize containerOffset = ancestorContainer->offsetFromAncestorContainer(*container);
|
|
transformState.move(-containerOffset.width(), -containerOffset.height(), preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform);
|
|
return;
|
|
}
|
|
|
|
mode.remove(ApplyContainerFlip);
|
|
|
|
container->mapLocalToContainer(ancestorContainer, transformState, mode, wasFixed);
|
|
}
|
|
|
|
const RenderObject* RenderBox::pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap& geometryMap) const
|
|
{
|
|
ASSERT(ancestorToStopAt != this);
|
|
|
|
bool ancestorSkipped;
|
|
RenderElement* container = this->container(ancestorToStopAt, ancestorSkipped);
|
|
if (!container)
|
|
return nullptr;
|
|
|
|
bool isFixedPos = isFixedPositioned();
|
|
LayoutSize adjustmentForSkippedAncestor;
|
|
if (ancestorSkipped) {
|
|
// There can't be a transform between repaintContainer and container, because transforms create containers, so it should be safe
|
|
// to just subtract the delta between the ancestor and container.
|
|
adjustmentForSkippedAncestor = -ancestorToStopAt->offsetFromAncestorContainer(*container);
|
|
}
|
|
|
|
bool offsetDependsOnPoint = false;
|
|
LayoutSize containerOffset = offsetFromContainer(*container, LayoutPoint(), &offsetDependsOnPoint);
|
|
|
|
bool preserve3D = container->style().preserves3D() || style().preserves3D();
|
|
if (shouldUseTransformFromContainer(container) && (geometryMap.mapCoordinatesFlags() & UseTransforms)) {
|
|
TransformationMatrix t;
|
|
getTransformFromContainer(container, containerOffset, t);
|
|
t.translateRight(adjustmentForSkippedAncestor.width(), adjustmentForSkippedAncestor.height());
|
|
|
|
geometryMap.push(this, t, preserve3D, offsetDependsOnPoint, isFixedPos, hasTransform());
|
|
} else {
|
|
containerOffset += adjustmentForSkippedAncestor;
|
|
geometryMap.push(this, containerOffset, preserve3D, offsetDependsOnPoint, isFixedPos, hasTransform());
|
|
}
|
|
|
|
return ancestorSkipped ? ancestorToStopAt : container;
|
|
}
|
|
|
|
void RenderBox::mapAbsoluteToLocalPoint(OptionSet<MapCoordinatesMode> mode, TransformState& transformState) const
|
|
{
|
|
bool isFixedPos = isFixedPositioned();
|
|
if (hasTransform() && !isFixedPos) {
|
|
// If this box has a transform, it acts as a fixed position container for fixed descendants,
|
|
// and may itself also be fixed position. So propagate 'fixed' up only if this box is fixed position.
|
|
mode.remove(IsFixed);
|
|
} else if (isFixedPos)
|
|
mode.add(IsFixed);
|
|
|
|
RenderBoxModelObject::mapAbsoluteToLocalPoint(mode, transformState);
|
|
}
|
|
|
|
LayoutSize RenderBox::offsetFromContainer(RenderElement& container, const LayoutPoint&, bool* offsetDependsOnPoint) const
|
|
{
|
|
// A fragment "has" boxes inside it without being their container.
|
|
ASSERT(&container == this->container() || is<RenderFragmentContainer>(container));
|
|
|
|
LayoutSize offset;
|
|
if (isInFlowPositioned())
|
|
offset += offsetForInFlowPosition();
|
|
|
|
if (!isInline() || isReplaced())
|
|
offset += topLeftLocationOffset();
|
|
|
|
if (is<RenderBox>(container))
|
|
offset -= toLayoutSize(downcast<RenderBox>(container).scrollPosition());
|
|
|
|
if (isAbsolutelyPositioned() && container.isInFlowPositioned() && is<RenderInline>(container))
|
|
offset += downcast<RenderInline>(container).offsetForInFlowPositionedInline(this);
|
|
|
|
if (offsetDependsOnPoint)
|
|
*offsetDependsOnPoint |= is<RenderFragmentedFlow>(container);
|
|
|
|
return offset;
|
|
}
|
|
|
|
std::unique_ptr<LegacyInlineElementBox> RenderBox::createInlineBox()
|
|
{
|
|
return makeUnique<LegacyInlineElementBox>(*this);
|
|
}
|
|
|
|
void RenderBox::dirtyLineBoxes(bool fullLayout)
|
|
{
|
|
if (!m_inlineBoxWrapper)
|
|
return;
|
|
|
|
if (fullLayout) {
|
|
delete m_inlineBoxWrapper;
|
|
m_inlineBoxWrapper = nullptr;
|
|
} else
|
|
m_inlineBoxWrapper->dirtyLineBoxes();
|
|
}
|
|
|
|
void RenderBox::positionLineBox(LegacyInlineElementBox& box)
|
|
{
|
|
if (isOutOfFlowPositioned()) {
|
|
// Cache the x position only if we were an DisplayType::Inline type originally.
|
|
bool wasInline = style().isOriginalDisplayInlineType();
|
|
if (wasInline) {
|
|
// The value is cached in the xPos of the box. We only need this value if
|
|
// our object was inline originally, since otherwise it would have ended up underneath
|
|
// the inlines.
|
|
LegacyRootInlineBox& rootBox = box.root();
|
|
rootBox.blockFlow().setStaticInlinePositionForChild(*this, rootBox.lineBoxTop(), LayoutUnit::fromFloatRound(box.logicalLeft()));
|
|
if (style().hasStaticInlinePosition(box.isHorizontal()))
|
|
setChildNeedsLayout(MarkOnlyThis); // Just mark the positioned object as needing layout, so it will update its position properly.
|
|
} else {
|
|
// Our object was a block originally, so we make our normal flow position be
|
|
// just below the line box (as though all the inlines that came before us got
|
|
// wrapped in an anonymous block, which is what would have happened had we been
|
|
// in flow). This value was cached in the y() of the box.
|
|
layer()->setStaticBlockPosition(LayoutUnit(box.logicalTop()));
|
|
if (style().hasStaticBlockPosition(box.isHorizontal()))
|
|
setChildNeedsLayout(MarkOnlyThis); // Just mark the positioned object as needing layout, so it will update its position properly.
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (isReplaced()) {
|
|
setLocation(LayoutPoint(box.topLeft()));
|
|
setInlineBoxWrapper(&box);
|
|
}
|
|
}
|
|
|
|
void RenderBox::deleteLineBoxWrapper()
|
|
{
|
|
if (!m_inlineBoxWrapper)
|
|
return;
|
|
|
|
if (!renderTreeBeingDestroyed())
|
|
m_inlineBoxWrapper->removeFromParent();
|
|
delete m_inlineBoxWrapper;
|
|
m_inlineBoxWrapper = nullptr;
|
|
}
|
|
|
|
LayoutRect RenderBox::clippedOverflowRect(const RenderLayerModelObject* repaintContainer, VisibleRectContext context) const
|
|
{
|
|
if (style().visibility() != Visibility::Visible && !enclosingLayer()->hasVisibleContent())
|
|
return LayoutRect();
|
|
LayoutRect r = visualOverflowRect();
|
|
// FIXME: layoutDelta needs to be applied in parts before/after transforms and
|
|
// repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308
|
|
r.move(view().frameView().layoutContext().layoutDelta());
|
|
return computeRect(r, repaintContainer, context);
|
|
}
|
|
|
|
LayoutRect RenderBox::computeVisibleRectUsingPaintOffset(const LayoutRect& rect) const
|
|
{
|
|
LayoutRect adjustedRect = rect;
|
|
auto* layoutState = view().frameView().layoutContext().layoutState();
|
|
|
|
if (layer() && layer()->transform())
|
|
adjustedRect = LayoutRect(encloseRectToDevicePixels(layer()->transform()->mapRect(adjustedRect), document().deviceScaleFactor()));
|
|
|
|
// We can't trust the bits on RenderObject, because this might be called while re-resolving style.
|
|
if (style().hasInFlowPosition() && layer())
|
|
adjustedRect.move(layer()->offsetForInFlowPosition());
|
|
|
|
adjustedRect.moveBy(location());
|
|
adjustedRect.move(layoutState->paintOffset());
|
|
if (layoutState->isClipped())
|
|
adjustedRect.intersect(layoutState->clipRect());
|
|
return adjustedRect;
|
|
}
|
|
|
|
std::optional<LayoutRect> RenderBox::computeVisibleRectInContainer(const LayoutRect& rect, const RenderLayerModelObject* container, VisibleRectContext context) const
|
|
{
|
|
// The rect we compute at each step is shifted by our x/y offset in the parent container's coordinate space.
|
|
// Only when we cross a writing mode boundary will we have to possibly flipForWritingMode (to convert into a more appropriate
|
|
// offset corner for the enclosing container). This allows for a fully RL or BT document to repaint
|
|
// properly even during layout, since the rect remains flipped all the way until the end.
|
|
//
|
|
// RenderView::computeVisibleRectInContainer then converts the rect to physical coordinates. We also convert to
|
|
// physical when we hit a repaint container boundary. Therefore the final rect returned is always in the
|
|
// physical coordinate space of the container.
|
|
const RenderStyle& styleToUse = style();
|
|
// Paint offset cache is only valid for root-relative, non-fixed position repainting
|
|
if (view().frameView().layoutContext().isPaintOffsetCacheEnabled() && !container && styleToUse.position() != PositionType::Fixed && !context.options.contains(VisibleRectContextOption::UseEdgeInclusiveIntersection))
|
|
return computeVisibleRectUsingPaintOffset(rect);
|
|
|
|
LayoutRect adjustedRect = rect;
|
|
if (hasReflection())
|
|
adjustedRect.unite(reflectedRect(adjustedRect));
|
|
|
|
if (container == this) {
|
|
if (container->style().isFlippedBlocksWritingMode())
|
|
flipForWritingMode(adjustedRect);
|
|
if (context.descendantNeedsEnclosingIntRect)
|
|
adjustedRect = enclosingIntRect(adjustedRect);
|
|
return adjustedRect;
|
|
}
|
|
|
|
bool containerIsSkipped;
|
|
auto* localContainer = this->container(container, containerIsSkipped);
|
|
if (!localContainer)
|
|
return adjustedRect;
|
|
|
|
if (isWritingModeRoot()) {
|
|
if (!isOutOfFlowPositioned() || !context.dirtyRectIsFlipped) {
|
|
flipForWritingMode(adjustedRect);
|
|
context.dirtyRectIsFlipped = true;
|
|
}
|
|
}
|
|
|
|
LayoutSize locationOffset = this->locationOffset();
|
|
// FIXME: This is needed as long as RenderWidget snaps to integral size/position.
|
|
if (isRenderReplaced() && isWidget()) {
|
|
LayoutSize flooredLocationOffset = toIntSize(flooredIntPoint(locationOffset));
|
|
adjustedRect.expand(locationOffset - flooredLocationOffset);
|
|
locationOffset = flooredLocationOffset;
|
|
context.descendantNeedsEnclosingIntRect = true;
|
|
}
|
|
|
|
if (is<RenderMultiColumnFlow>(this)) {
|
|
// We won't normally run this code. Only when the container is null (i.e., we're trying
|
|
// to get the rect in view coordinates) will we come in here, since normally container
|
|
// will be set and we'll stop at the flow thread. This case is mainly hit by the check for whether
|
|
// or not images should animate.
|
|
// FIXME: Just as with offsetFromContainer, we aren't really handling objects that span
|
|
// multiple columns properly.
|
|
LayoutPoint physicalPoint(flipForWritingMode(adjustedRect.location()));
|
|
if (auto* fragment = downcast<RenderMultiColumnFlow>(*this).physicalTranslationFromFlowToFragment((physicalPoint))) {
|
|
adjustedRect.setLocation(fragment->flipForWritingMode(physicalPoint));
|
|
return fragment->computeVisibleRectInContainer(adjustedRect, container, context);
|
|
}
|
|
}
|
|
|
|
LayoutPoint topLeft = adjustedRect.location();
|
|
topLeft.move(locationOffset);
|
|
|
|
// We are now in our parent container's coordinate space. Apply our transform to obtain a bounding box
|
|
// in the parent's coordinate space that encloses us.
|
|
auto position = styleToUse.position();
|
|
if (hasLayer() && layer()->transform()) {
|
|
context.hasPositionFixedDescendant = position == PositionType::Fixed;
|
|
adjustedRect = LayoutRect(encloseRectToDevicePixels(layer()->transform()->mapRect(adjustedRect), document().deviceScaleFactor()));
|
|
topLeft = adjustedRect.location();
|
|
topLeft.move(locationOffset);
|
|
} else if (position == PositionType::Fixed)
|
|
context.hasPositionFixedDescendant = true;
|
|
|
|
if (position == PositionType::Absolute && localContainer->isInFlowPositioned() && is<RenderInline>(*localContainer))
|
|
topLeft += downcast<RenderInline>(*localContainer).offsetForInFlowPositionedInline(this);
|
|
else if (styleToUse.hasInFlowPosition() && layer()) {
|
|
// Apply the relative position offset when invalidating a rectangle. The layer
|
|
// is translated, but the render box isn't, so we need to do this to get the
|
|
// right dirty rect. Since this is called from RenderObject::setStyle, the relative position
|
|
// flag on the RenderObject has been cleared, so use the one on the style().
|
|
topLeft += layer()->offsetForInFlowPosition();
|
|
}
|
|
|
|
// FIXME: We ignore the lightweight clipping rect that controls use, since if |o| is in mid-layout,
|
|
// its controlClipRect will be wrong. For overflow clip we use the values cached by the layer.
|
|
adjustedRect.setLocation(topLeft);
|
|
if (localContainer->hasNonVisibleOverflow()) {
|
|
RenderBox& containerBox = downcast<RenderBox>(*localContainer);
|
|
bool isEmpty = !containerBox.applyCachedClipAndScrollPosition(adjustedRect, container, context);
|
|
if (isEmpty) {
|
|
if (context.options.contains(VisibleRectContextOption::UseEdgeInclusiveIntersection))
|
|
return std::nullopt;
|
|
return adjustedRect;
|
|
}
|
|
}
|
|
|
|
if (containerIsSkipped) {
|
|
// If the container is below localContainer, then we need to map the rect into container's coordinates.
|
|
LayoutSize containerOffset = container->offsetFromAncestorContainer(*localContainer);
|
|
adjustedRect.move(-containerOffset);
|
|
return adjustedRect;
|
|
}
|
|
return localContainer->computeVisibleRectInContainer(adjustedRect, container, context);
|
|
}
|
|
|
|
void RenderBox::repaintDuringLayoutIfMoved(const LayoutRect& oldRect)
|
|
{
|
|
if (oldRect.location() != m_frameRect.location()) {
|
|
LayoutRect newRect = m_frameRect;
|
|
// The child moved. Invalidate the object's old and new positions. We have to do this
|
|
// since the object may not have gotten a layout.
|
|
m_frameRect = oldRect;
|
|
repaint();
|
|
repaintOverhangingFloats(true);
|
|
m_frameRect = newRect;
|
|
repaint();
|
|
repaintOverhangingFloats(true);
|
|
}
|
|
}
|
|
|
|
void RenderBox::repaintOverhangingFloats(bool)
|
|
{
|
|
}
|
|
|
|
void RenderBox::updateLogicalWidth()
|
|
{
|
|
LogicalExtentComputedValues computedValues;
|
|
computeLogicalWidthInFragment(computedValues);
|
|
|
|
setLogicalWidth(computedValues.m_extent);
|
|
setLogicalLeft(computedValues.m_position);
|
|
setMarginStart(computedValues.m_margins.m_start);
|
|
setMarginEnd(computedValues.m_margins.m_end);
|
|
}
|
|
|
|
static LayoutUnit inlineSizeFromAspectRatio(LayoutUnit borderPaddingInlineSum, LayoutUnit borderPaddingBlockSum, double aspectRatio, BoxSizing boxSizing, LayoutUnit blockSize)
|
|
{
|
|
if (boxSizing == BoxSizing::BorderBox)
|
|
return LayoutUnit(blockSize * aspectRatio);
|
|
|
|
return LayoutUnit((blockSize - borderPaddingBlockSum) * aspectRatio) + borderPaddingInlineSum;
|
|
}
|
|
|
|
void RenderBox::computeLogicalWidthInFragment(LogicalExtentComputedValues& computedValues, RenderFragmentContainer* fragment) const
|
|
{
|
|
computedValues.m_extent = logicalWidth();
|
|
computedValues.m_position = logicalLeft();
|
|
computedValues.m_margins.m_start = marginStart();
|
|
computedValues.m_margins.m_end = marginEnd();
|
|
|
|
if (isOutOfFlowPositioned()) {
|
|
// FIXME: This calculation is not patched for block-flow yet.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46500
|
|
computePositionedLogicalWidth(computedValues, fragment);
|
|
return;
|
|
}
|
|
|
|
// If layout is limited to a subtree, the subtree root's logical width does not change.
|
|
if (element() && !view().frameView().layoutContext().isLayoutPending() && view().frameView().layoutContext().subtreeLayoutRoot() == this)
|
|
return;
|
|
|
|
// The parent box is flexing us, so it has increased or decreased our
|
|
// width. Use the width from the style context.
|
|
// FIXME: Account for block-flow in flexible boxes.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46418
|
|
if (hasOverridingLogicalWidth() && (isRubyRun() || style().borderFit() == BorderFit::Lines || (parent()->isFlexibleBoxIncludingDeprecated()))) {
|
|
computedValues.m_extent = overridingLogicalWidth();
|
|
return;
|
|
}
|
|
|
|
// FIXME: Account for block-flow in flexible boxes.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46418
|
|
bool inVerticalBox = parent()->isDeprecatedFlexibleBox() && (parent()->style().boxOrient() == BoxOrient::Vertical);
|
|
bool stretching = (parent()->style().boxAlign() == BoxAlignment::Stretch);
|
|
// FIXME: Stretching is the only reason why we don't want the box to be treated as a replaced element, so we could perhaps
|
|
// refactor all this logic, not only for flex and grid since alignment is intended to be applied to any block.
|
|
bool treatAsReplaced = shouldComputeSizeAsReplaced() && (!inVerticalBox || !stretching);
|
|
treatAsReplaced = treatAsReplaced && (!isGridItem() || !hasStretchedLogicalWidth());
|
|
|
|
const RenderStyle& styleToUse = style();
|
|
Length logicalWidthLength = treatAsReplaced ? Length(computeReplacedLogicalWidth(), LengthType::Fixed) : styleToUse.logicalWidth();
|
|
|
|
RenderBlock& cb = *containingBlock();
|
|
LayoutUnit containerLogicalWidth = std::max<LayoutUnit>(0, containingBlockLogicalWidthForContentInFragment(fragment));
|
|
bool hasPerpendicularContainingBlock = cb.isHorizontalWritingMode() != isHorizontalWritingMode();
|
|
|
|
if (isInline() && !isInlineBlockOrInlineTable()) {
|
|
// just calculate margins
|
|
computedValues.m_margins.m_start = minimumValueForLength(styleToUse.marginStart(), containerLogicalWidth);
|
|
computedValues.m_margins.m_end = minimumValueForLength(styleToUse.marginEnd(), containerLogicalWidth);
|
|
if (treatAsReplaced)
|
|
computedValues.m_extent = std::max(LayoutUnit(floatValueForLength(logicalWidthLength, 0) + borderAndPaddingLogicalWidth()), minPreferredLogicalWidth());
|
|
return;
|
|
}
|
|
|
|
LayoutUnit containerWidthInInlineDirection = containerLogicalWidth;
|
|
if (hasPerpendicularContainingBlock)
|
|
containerWidthInInlineDirection = perpendicularContainingBlockLogicalHeight();
|
|
|
|
// Width calculations
|
|
if (treatAsReplaced) {
|
|
computedValues.m_extent = logicalWidthLength.value() + borderAndPaddingLogicalWidth();
|
|
} else if (shouldComputeLogicalWidthFromAspectRatio() && style().logicalWidth().isAuto()) {
|
|
computedValues.m_extent = computeLogicalWidthFromAspectRatio(fragment);
|
|
} else {
|
|
LayoutUnit preferredWidth = computeLogicalWidthInFragmentUsing(MainOrPreferredSize, styleToUse.logicalWidth(), containerWidthInInlineDirection, cb, fragment);
|
|
computedValues.m_extent = constrainLogicalWidthInFragmentByMinMax(preferredWidth, containerWidthInInlineDirection, cb, fragment);
|
|
}
|
|
|
|
// Margin calculations.
|
|
if (hasPerpendicularContainingBlock || isFloating() || isInline()) {
|
|
computedValues.m_margins.m_start = minimumValueForLength(styleToUse.marginStart(), containerLogicalWidth);
|
|
computedValues.m_margins.m_end = minimumValueForLength(styleToUse.marginEnd(), containerLogicalWidth);
|
|
} else {
|
|
LayoutUnit containerLogicalWidthForAutoMargins = containerLogicalWidth;
|
|
if (avoidsFloats() && cb.containsFloats())
|
|
containerLogicalWidthForAutoMargins = containingBlockAvailableLineWidthInFragment(fragment);
|
|
bool hasInvertedDirection = cb.style().isLeftToRightDirection() != style().isLeftToRightDirection();
|
|
computeInlineDirectionMargins(cb, containerLogicalWidthForAutoMargins, computedValues.m_extent,
|
|
hasInvertedDirection ? computedValues.m_margins.m_end : computedValues.m_margins.m_start,
|
|
hasInvertedDirection ? computedValues.m_margins.m_start : computedValues.m_margins.m_end);
|
|
}
|
|
|
|
if (!hasPerpendicularContainingBlock && containerLogicalWidth && containerLogicalWidth != (computedValues.m_extent + computedValues.m_margins.m_start + computedValues.m_margins.m_end)
|
|
&& !isFloating() && !isInline() && !cb.isFlexibleBoxIncludingDeprecated()
|
|
#if ENABLE(MATHML)
|
|
// RenderMathMLBlocks take the size of their content so we must not adjust the margin to fill the container size.
|
|
&& !cb.isRenderMathMLBlock()
|
|
#endif
|
|
&& !cb.isRenderGrid()
|
|
) {
|
|
LayoutUnit newMarginTotal = containerLogicalWidth - computedValues.m_extent;
|
|
bool hasInvertedDirection = cb.style().isLeftToRightDirection() != style().isLeftToRightDirection();
|
|
if (hasInvertedDirection)
|
|
computedValues.m_margins.m_start = newMarginTotal - computedValues.m_margins.m_end;
|
|
else
|
|
computedValues.m_margins.m_end = newMarginTotal - computedValues.m_margins.m_start;
|
|
}
|
|
}
|
|
|
|
LayoutUnit RenderBox::fillAvailableMeasure(LayoutUnit availableLogicalWidth) const
|
|
{
|
|
LayoutUnit marginStart;
|
|
LayoutUnit marginEnd;
|
|
return fillAvailableMeasure(availableLogicalWidth, marginStart, marginEnd);
|
|
}
|
|
|
|
LayoutUnit RenderBox::fillAvailableMeasure(LayoutUnit availableLogicalWidth, LayoutUnit& marginStart, LayoutUnit& marginEnd) const
|
|
{
|
|
marginStart = minimumValueForLength(style().marginStart(), availableLogicalWidth);
|
|
marginEnd = minimumValueForLength(style().marginEnd(), availableLogicalWidth);
|
|
return availableLogicalWidth - marginStart - marginEnd;
|
|
}
|
|
|
|
LayoutUnit RenderBox::computeIntrinsicLogicalWidthUsing(Length logicalWidthLength, LayoutUnit availableLogicalWidth, LayoutUnit borderAndPadding) const
|
|
{
|
|
if (logicalWidthLength.isFillAvailable())
|
|
return std::max(borderAndPadding, fillAvailableMeasure(availableLogicalWidth));
|
|
|
|
LayoutUnit minLogicalWidth;
|
|
LayoutUnit maxLogicalWidth;
|
|
if (!logicalWidthLength.isMinIntrinsic() && shouldComputeLogicalWidthFromAspectRatio()) {
|
|
minLogicalWidth = maxLogicalWidth = computeLogicalWidthFromAspectRatioInternal() - borderAndPadding;
|
|
if (firstChild()) {
|
|
LayoutUnit minChildrenLogicalWidth;
|
|
LayoutUnit maxChildrenLogicalWidth;
|
|
computeIntrinsicKeywordLogicalWidths(minChildrenLogicalWidth, maxChildrenLogicalWidth);
|
|
minLogicalWidth = std::max(minLogicalWidth, minChildrenLogicalWidth);
|
|
maxLogicalWidth = std::max(maxLogicalWidth, maxChildrenLogicalWidth);
|
|
}
|
|
} else
|
|
computeIntrinsicKeywordLogicalWidths(minLogicalWidth, maxLogicalWidth);
|
|
|
|
if (logicalWidthLength.isMinContent() || logicalWidthLength.isMinIntrinsic())
|
|
return minLogicalWidth + borderAndPadding;
|
|
|
|
if (logicalWidthLength.isMaxContent())
|
|
return maxLogicalWidth + borderAndPadding;
|
|
|
|
if (logicalWidthLength.isFitContent()) {
|
|
minLogicalWidth += borderAndPadding;
|
|
maxLogicalWidth += borderAndPadding;
|
|
return std::max(minLogicalWidth, std::min(maxLogicalWidth, fillAvailableMeasure(availableLogicalWidth)));
|
|
}
|
|
|
|
ASSERT_NOT_REACHED();
|
|
return 0;
|
|
}
|
|
|
|
LayoutUnit RenderBox::computeLogicalWidthInFragmentUsing(SizeType widthType, Length logicalWidth, LayoutUnit availableLogicalWidth,
|
|
const RenderBlock& cb, RenderFragmentContainer* fragment) const
|
|
{
|
|
ASSERT(widthType == MinSize || widthType == MainOrPreferredSize || !logicalWidth.isAuto());
|
|
if (widthType == MinSize && logicalWidth.isAuto())
|
|
return adjustBorderBoxLogicalWidthForBoxSizing(0, logicalWidth.type());
|
|
|
|
if (!logicalWidth.isIntrinsicOrAuto()) {
|
|
// FIXME: If the containing block flow is perpendicular to our direction we need to use the available logical height instead.
|
|
return adjustBorderBoxLogicalWidthForBoxSizing(valueForLength(logicalWidth, availableLogicalWidth), logicalWidth.type());
|
|
}
|
|
|
|
if (logicalWidth.isIntrinsic() || logicalWidth.isMinIntrinsic())
|
|
return computeIntrinsicLogicalWidthUsing(logicalWidth, availableLogicalWidth, borderAndPaddingLogicalWidth());
|
|
|
|
LayoutUnit marginStart;
|
|
LayoutUnit marginEnd;
|
|
LayoutUnit logicalWidthResult = fillAvailableMeasure(availableLogicalWidth, marginStart, marginEnd);
|
|
|
|
if (shrinkToAvoidFloats() && cb.containsFloats())
|
|
logicalWidthResult = std::min(logicalWidthResult, shrinkLogicalWidthToAvoidFloats(marginStart, marginEnd, cb, fragment));
|
|
|
|
if (widthType == MainOrPreferredSize && sizesLogicalWidthToFitContent(widthType))
|
|
return std::max(minPreferredLogicalWidth(), std::min(maxPreferredLogicalWidth(), logicalWidthResult));
|
|
return logicalWidthResult;
|
|
}
|
|
|
|
bool RenderBox::columnFlexItemHasStretchAlignment() const
|
|
{
|
|
// auto margins mean we don't stretch. Note that this function will only be
|
|
// used for widths, so we don't have to check marginBefore/marginAfter.
|
|
const auto& parentStyle = parent()->style();
|
|
ASSERT(parentStyle.isColumnFlexDirection());
|
|
if (style().marginStart().isAuto() || style().marginEnd().isAuto())
|
|
return false;
|
|
return style().resolvedAlignSelf(&parentStyle, containingBlock()->selfAlignmentNormalBehavior()).position() == ItemPosition::Stretch;
|
|
}
|
|
|
|
bool RenderBox::isStretchingColumnFlexItem() const
|
|
{
|
|
if (parent()->isDeprecatedFlexibleBox() && parent()->style().boxOrient() == BoxOrient::Vertical && parent()->style().boxAlign() == BoxAlignment::Stretch)
|
|
return true;
|
|
|
|
// We don't stretch multiline flexboxes because they need to apply line spacing (align-content) first.
|
|
if (parent()->isFlexibleBox() && parent()->style().flexWrap() == FlexWrap::NoWrap && parent()->style().isColumnFlexDirection() && columnFlexItemHasStretchAlignment())
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
// FIXME: Can/Should we move this inside specific layout classes (flex. grid)? Can we refactor columnFlexItemHasStretchAlignment logic?
|
|
bool RenderBox::hasStretchedLogicalHeight() const
|
|
{
|
|
auto& style = this->style();
|
|
if (!style.logicalHeight().isAuto() || style.marginBefore().isAuto() || style.marginAfter().isAuto())
|
|
return false;
|
|
RenderBlock* containingBlock = this->containingBlock();
|
|
if (!containingBlock) {
|
|
// We are evaluating align-self/justify-self, which default to 'normal' for the root element.
|
|
// The 'normal' value behaves like 'start' except for Flexbox Items, which obviously should have a container.
|
|
return false;
|
|
}
|
|
if (containingBlock->isHorizontalWritingMode() != isHorizontalWritingMode())
|
|
return style.resolvedJustifySelf(&containingBlock->style(), containingBlock->selfAlignmentNormalBehavior(this)).position() == ItemPosition::Stretch;
|
|
return style.resolvedAlignSelf(&containingBlock->style(), containingBlock->selfAlignmentNormalBehavior(this)).position() == ItemPosition::Stretch;
|
|
}
|
|
|
|
// FIXME: Can/Should we move this inside specific layout classes (flex. grid)? Can we refactor columnFlexItemHasStretchAlignment logic?
|
|
bool RenderBox::hasStretchedLogicalWidth(StretchingMode stretchingMode) const
|
|
{
|
|
auto& style = this->style();
|
|
if (!style.logicalWidth().isAuto() || style.marginStart().isAuto() || style.marginEnd().isAuto())
|
|
return false;
|
|
RenderBlock* containingBlock = this->containingBlock();
|
|
if (!containingBlock) {
|
|
// We are evaluating align-self/justify-self, which default to 'normal' for the root element.
|
|
// The 'normal' value behaves like 'start' except for Flexbox Items, which obviously should have a container.
|
|
return false;
|
|
}
|
|
auto normalItemPosition = stretchingMode == StretchingMode::Any ? containingBlock->selfAlignmentNormalBehavior(this) : ItemPosition::Normal;
|
|
if (containingBlock->isHorizontalWritingMode() != isHorizontalWritingMode())
|
|
return style.resolvedAlignSelf(&containingBlock->style(), normalItemPosition).position() == ItemPosition::Stretch;
|
|
return style.resolvedJustifySelf(&containingBlock->style(), normalItemPosition).position() == ItemPosition::Stretch;
|
|
}
|
|
|
|
bool RenderBox::sizesLogicalWidthToFitContent(SizeType widthType) const
|
|
{
|
|
// Marquees in WinIE are like a mixture of blocks and inline-blocks. They size as though they're blocks,
|
|
// but they allow text to sit on the same line as the marquee.
|
|
if (isFloating() || (isInlineBlockOrInlineTable() && !isHTMLMarquee()))
|
|
return true;
|
|
|
|
if (isGridItem())
|
|
return !hasStretchedLogicalWidth();
|
|
|
|
// This code may look a bit strange. Basically width:intrinsic should clamp the size when testing both
|
|
// min-width and width. max-width is only clamped if it is also intrinsic.
|
|
Length logicalWidth = (widthType == MaxSize) ? style().logicalMaxWidth() : style().logicalWidth();
|
|
if (logicalWidth.type() == LengthType::Intrinsic)
|
|
return true;
|
|
|
|
// Children of a horizontal marquee do not fill the container by default.
|
|
// FIXME: Need to deal with MarqueeDirection::Auto value properly. It could be vertical.
|
|
// FIXME: Think about block-flow here. Need to find out how marquee direction relates to
|
|
// block-flow (as well as how marquee overflow should relate to block flow).
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46472
|
|
if (parent()->isHTMLMarquee()) {
|
|
MarqueeDirection dir = parent()->style().marqueeDirection();
|
|
if (dir == MarqueeDirection::Auto || dir == MarqueeDirection::Forward || dir == MarqueeDirection::Backward || dir == MarqueeDirection::Left || dir == MarqueeDirection::Right)
|
|
return true;
|
|
}
|
|
|
|
#if ENABLE(MATHML)
|
|
// RenderMathMLBlocks take the size of their content, not of their container.
|
|
if (parent()->isRenderMathMLBlock())
|
|
return true;
|
|
#endif
|
|
|
|
// Flexible box items should shrink wrap, so we lay them out at their intrinsic widths.
|
|
// In the case of columns that have a stretch alignment, we layout at the stretched size
|
|
// to avoid an extra layout when applying alignment.
|
|
if (parent()->isFlexibleBox()) {
|
|
// For multiline columns, we need to apply align-content first, so we can't stretch now.
|
|
if (!parent()->style().isColumnFlexDirection() || parent()->style().flexWrap() != FlexWrap::NoWrap)
|
|
return true;
|
|
if (!columnFlexItemHasStretchAlignment())
|
|
return true;
|
|
}
|
|
|
|
// Flexible horizontal boxes lay out children at their intrinsic widths. Also vertical boxes
|
|
// that don't stretch their kids lay out their children at their intrinsic widths.
|
|
// FIXME: Think about block-flow here.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46473
|
|
if (parent()->isDeprecatedFlexibleBox() && (parent()->style().boxOrient() == BoxOrient::Horizontal || parent()->style().boxAlign() != BoxAlignment::Stretch))
|
|
return true;
|
|
|
|
// Button, input, select, textarea, and legend treat width value of 'auto' as 'intrinsic' unless it's in a
|
|
// stretching column flexbox.
|
|
// FIXME: Think about block-flow here.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46473
|
|
if (logicalWidth.isAuto() && !isStretchingColumnFlexItem() && element() && (is<HTMLInputElement>(*element()) || is<HTMLSelectElement>(*element()) || is<HTMLButtonElement>(*element()) || is<HTMLTextAreaElement>(*element()) || is<HTMLLegendElement>(*element())))
|
|
return true;
|
|
|
|
if (isHorizontalWritingMode() != containingBlock()->isHorizontalWritingMode())
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
void RenderBox::computeInlineDirectionMargins(const RenderBlock& containingBlock, LayoutUnit containerWidth, LayoutUnit childWidth, LayoutUnit& marginStart, LayoutUnit& marginEnd) const
|
|
{
|
|
|
|
const RenderStyle& containingBlockStyle = containingBlock.style();
|
|
Length marginStartLength = style().marginStartUsing(&containingBlockStyle);
|
|
Length marginEndLength = style().marginEndUsing(&containingBlockStyle);
|
|
|
|
if (isFloating() || isInline()) {
|
|
// Inline blocks/tables and floats don't have their margins increased.
|
|
marginStart = minimumValueForLength(marginStartLength, containerWidth);
|
|
marginEnd = minimumValueForLength(marginEndLength, containerWidth);
|
|
return;
|
|
}
|
|
|
|
if (containingBlock.isFlexibleBox()) {
|
|
// We need to let flexbox handle the margin adjustment - otherwise, flexbox
|
|
// will think we're wider than we actually are and calculate line sizes
|
|
// wrong. See also http://dev.w3.org/csswg/css-flexbox/#auto-margins
|
|
if (marginStartLength.isAuto())
|
|
marginStartLength = Length(0, LengthType::Fixed);
|
|
if (marginEndLength.isAuto())
|
|
marginEndLength = Length(0, LengthType::Fixed);
|
|
}
|
|
|
|
// Case One: The object is being centered in the containing block's available logical width.
|
|
if ((marginStartLength.isAuto() && marginEndLength.isAuto() && childWidth < containerWidth)
|
|
|| (!marginStartLength.isAuto() && !marginEndLength.isAuto() && containingBlock.style().textAlign() == TextAlignMode::WebKitCenter)) {
|
|
// Other browsers center the margin box for align=center elements so we match them here.
|
|
LayoutUnit marginStartWidth = minimumValueForLength(marginStartLength, containerWidth);
|
|
LayoutUnit marginEndWidth = minimumValueForLength(marginEndLength, containerWidth);
|
|
LayoutUnit centeredMarginBoxStart = std::max<LayoutUnit>(0, (containerWidth - childWidth - marginStartWidth - marginEndWidth) / 2);
|
|
marginStart = centeredMarginBoxStart + marginStartWidth;
|
|
marginEnd = containerWidth - childWidth - marginStart + marginEndWidth;
|
|
return;
|
|
}
|
|
|
|
// Case Two: The object is being pushed to the start of the containing block's available logical width.
|
|
if (marginEndLength.isAuto() && childWidth < containerWidth) {
|
|
marginStart = valueForLength(marginStartLength, containerWidth);
|
|
marginEnd = containerWidth - childWidth - marginStart;
|
|
return;
|
|
}
|
|
|
|
// Case Three: The object is being pushed to the end of the containing block's available logical width.
|
|
bool pushToEndFromTextAlign = !marginEndLength.isAuto() && ((!containingBlockStyle.isLeftToRightDirection() && containingBlockStyle.textAlign() == TextAlignMode::WebKitLeft)
|
|
|| (containingBlockStyle.isLeftToRightDirection() && containingBlockStyle.textAlign() == TextAlignMode::WebKitRight));
|
|
if ((marginStartLength.isAuto() || pushToEndFromTextAlign) && childWidth < containerWidth) {
|
|
marginEnd = valueForLength(marginEndLength, containerWidth);
|
|
marginStart = containerWidth - childWidth - marginEnd;
|
|
return;
|
|
}
|
|
|
|
// Case Four: Either no auto margins, or our width is >= the container width (css2.1, 10.3.3). In that case
|
|
// auto margins will just turn into 0.
|
|
marginStart = minimumValueForLength(marginStartLength, containerWidth);
|
|
marginEnd = minimumValueForLength(marginEndLength, containerWidth);
|
|
}
|
|
|
|
RenderBoxFragmentInfo* RenderBox::renderBoxFragmentInfo(RenderFragmentContainer* fragment, RenderBoxFragmentInfoFlags cacheFlag) const
|
|
{
|
|
// Make sure nobody is trying to call this with a null fragment.
|
|
if (!fragment)
|
|
return nullptr;
|
|
|
|
// If we have computed our width in this fragment already, it will be cached, and we can
|
|
// just return it.
|
|
RenderBoxFragmentInfo* boxInfo = fragment->renderBoxFragmentInfo(this);
|
|
if (boxInfo && cacheFlag == CacheRenderBoxFragmentInfo)
|
|
return boxInfo;
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
static bool shouldFlipBeforeAfterMargins(const RenderStyle& containingBlockStyle, const RenderStyle* childStyle)
|
|
{
|
|
ASSERT(containingBlockStyle.isHorizontalWritingMode() != childStyle->isHorizontalWritingMode());
|
|
WritingMode childWritingMode = childStyle->writingMode();
|
|
bool shouldFlip = false;
|
|
switch (containingBlockStyle.writingMode()) {
|
|
case WritingMode::TopToBottom:
|
|
shouldFlip = (childWritingMode == WritingMode::RightToLeft);
|
|
break;
|
|
case WritingMode::BottomToTop:
|
|
shouldFlip = (childWritingMode == WritingMode::RightToLeft);
|
|
break;
|
|
case WritingMode::RightToLeft:
|
|
shouldFlip = (childWritingMode == WritingMode::BottomToTop);
|
|
break;
|
|
case WritingMode::LeftToRight:
|
|
shouldFlip = (childWritingMode == WritingMode::BottomToTop);
|
|
break;
|
|
}
|
|
|
|
if (!containingBlockStyle.isLeftToRightDirection())
|
|
shouldFlip = !shouldFlip;
|
|
|
|
return shouldFlip;
|
|
}
|
|
|
|
void RenderBox::cacheIntrinsicContentLogicalHeightForFlexItem(LayoutUnit height) const
|
|
{
|
|
// FIXME: it should be enough with checking hasOverridingLogicalHeight() as this logic could be shared
|
|
// by any layout system using overrides like grid or flex. However this causes a never ending sequence of calls
|
|
// between layoutBlock() <-> relayoutToAvoidWidows().
|
|
if (isFloatingOrOutOfFlowPositioned() || !parent() || !parent()->isFlexibleBox() || hasOverridingLogicalHeight() || shouldComputeLogicalHeightFromAspectRatio())
|
|
return;
|
|
downcast<RenderFlexibleBox>(parent())->setCachedChildIntrinsicContentLogicalHeight(*this, height);
|
|
}
|
|
|
|
void RenderBox::updateLogicalHeight()
|
|
{
|
|
if (shouldApplySizeContainment(*this) && !isRenderGrid()) {
|
|
// We need the exact width of border and padding here, yet we can't use borderAndPadding* interfaces.
|
|
// Because these interfaces evetually call borderAfter/Before, and RenderBlock::borderBefore
|
|
// adds extra border to fieldset by adding intrinsicBorderForFieldset which is not needed here.
|
|
auto borderAndPadding = RenderBox::borderBefore() + RenderBox::paddingBefore() + RenderBox::borderAfter() + RenderBox::paddingAfter();
|
|
setLogicalHeight(borderAndPadding + scrollbarLogicalHeight());
|
|
}
|
|
|
|
cacheIntrinsicContentLogicalHeightForFlexItem(contentLogicalHeight());
|
|
auto computedValues = computeLogicalHeight(logicalHeight(), logicalTop());
|
|
setLogicalHeight(computedValues.m_extent);
|
|
setLogicalTop(computedValues.m_position);
|
|
setMarginBefore(computedValues.m_margins.m_before);
|
|
setMarginAfter(computedValues.m_margins.m_after);
|
|
}
|
|
|
|
RenderBox::LogicalExtentComputedValues RenderBox::computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop) const
|
|
{
|
|
LogicalExtentComputedValues computedValues;
|
|
computedValues.m_extent = logicalHeight;
|
|
computedValues.m_position = logicalTop;
|
|
|
|
// Cell height is managed by the table and inline non-replaced elements do not support a height property.
|
|
if (isTableCell() || (isInline() && !isReplaced()))
|
|
return computedValues;
|
|
|
|
Length h;
|
|
if (isOutOfFlowPositioned())
|
|
computePositionedLogicalHeight(computedValues);
|
|
else {
|
|
RenderBlock& cb = *containingBlock();
|
|
bool hasPerpendicularContainingBlock = cb.isHorizontalWritingMode() != isHorizontalWritingMode();
|
|
|
|
if (!hasPerpendicularContainingBlock) {
|
|
bool shouldFlipBeforeAfter = cb.style().writingMode() != style().writingMode();
|
|
computeBlockDirectionMargins(cb,
|
|
shouldFlipBeforeAfter ? computedValues.m_margins.m_after : computedValues.m_margins.m_before,
|
|
shouldFlipBeforeAfter ? computedValues.m_margins.m_before : computedValues.m_margins.m_after);
|
|
}
|
|
|
|
// For tables, calculate margins only.
|
|
if (isTable()) {
|
|
if (shouldComputeLogicalHeightFromAspectRatio())
|
|
computedValues.m_extent = blockSizeFromAspectRatio(horizontalBorderAndPaddingExtent(), verticalBorderAndPaddingExtent(), LayoutUnit(style().logicalAspectRatio()), style().boxSizingForAspectRatio(), logicalWidth());
|
|
if (hasPerpendicularContainingBlock) {
|
|
bool shouldFlipBeforeAfter = shouldFlipBeforeAfterMargins(cb.style(), &style());
|
|
computeInlineDirectionMargins(cb, containingBlockLogicalWidthForContent(), computedValues.m_extent,
|
|
shouldFlipBeforeAfter ? computedValues.m_margins.m_after : computedValues.m_margins.m_before,
|
|
shouldFlipBeforeAfter ? computedValues.m_margins.m_before : computedValues.m_margins.m_after);
|
|
}
|
|
return computedValues;
|
|
}
|
|
|
|
// FIXME: Account for block-flow in flexible boxes.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46418
|
|
bool inHorizontalBox = parent()->isDeprecatedFlexibleBox() && parent()->style().boxOrient() == BoxOrient::Horizontal;
|
|
bool stretching = parent()->style().boxAlign() == BoxAlignment::Stretch;
|
|
bool treatAsReplaced = shouldComputeSizeAsReplaced() && (!inHorizontalBox || !stretching);
|
|
bool checkMinMaxHeight = false;
|
|
|
|
// The parent box is flexing us, so it has increased or decreased our height. We have to
|
|
// grab our cached flexible height.
|
|
// FIXME: Account for block-flow in flexible boxes.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46418
|
|
if (hasOverridingLogicalHeight() && (parent()->isFlexibleBoxIncludingDeprecated() || parent()->isRenderGrid())) {
|
|
h = Length(overridingLogicalHeight(), LengthType::Fixed);
|
|
} else if (treatAsReplaced)
|
|
h = Length(computeReplacedLogicalHeight() + borderAndPaddingLogicalHeight(), LengthType::Fixed);
|
|
else {
|
|
h = style().logicalHeight();
|
|
checkMinMaxHeight = true;
|
|
}
|
|
|
|
// Block children of horizontal flexible boxes fill the height of the box.
|
|
// FIXME: Account for block-flow in flexible boxes.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46418
|
|
if (h.isAuto() && is<RenderDeprecatedFlexibleBox>(*parent()) && parent()->style().boxOrient() == BoxOrient::Horizontal
|
|
&& downcast<RenderDeprecatedFlexibleBox>(*parent()).isStretchingChildren()) {
|
|
h = Length(parentBox()->contentLogicalHeight() - marginBefore() - marginAfter(), LengthType::Fixed);
|
|
checkMinMaxHeight = false;
|
|
}
|
|
|
|
LayoutUnit heightResult;
|
|
if (checkMinMaxHeight) {
|
|
// Callers passing LayoutUnit::max() for logicalHeight means an indefinite height, so
|
|
// translate this to a nullopt intrinsic height for further logical height computations.
|
|
std::optional<LayoutUnit> intrinsicHeight;
|
|
if (computedValues.m_extent != LayoutUnit::max())
|
|
intrinsicHeight = computedValues.m_extent;
|
|
if (shouldComputeLogicalHeightFromAspectRatio()) {
|
|
if (intrinsicHeight && style().boxSizingForAspectRatio() == BoxSizing::ContentBox)
|
|
*intrinsicHeight -= borderAndPaddingLogicalHeight();
|
|
heightResult = blockSizeFromAspectRatio(horizontalBorderAndPaddingExtent(), verticalBorderAndPaddingExtent(), LayoutUnit(style().logicalAspectRatio()), style().boxSizingForAspectRatio(), logicalWidth());
|
|
} else {
|
|
if (intrinsicHeight)
|
|
*intrinsicHeight -= borderAndPaddingLogicalHeight();
|
|
heightResult = computeLogicalHeightUsing(MainOrPreferredSize, style().logicalHeight(), intrinsicHeight).value_or(computedValues.m_extent);
|
|
}
|
|
heightResult = constrainLogicalHeightByMinMax(heightResult, intrinsicHeight);
|
|
} else {
|
|
ASSERT(h.isFixed());
|
|
heightResult = h.value();
|
|
}
|
|
|
|
computedValues.m_extent = heightResult;
|
|
|
|
if (hasPerpendicularContainingBlock) {
|
|
bool shouldFlipBeforeAfter = shouldFlipBeforeAfterMargins(cb.style(), &style());
|
|
computeInlineDirectionMargins(cb, containingBlockLogicalWidthForContent(), heightResult,
|
|
shouldFlipBeforeAfter ? computedValues.m_margins.m_after : computedValues.m_margins.m_before,
|
|
shouldFlipBeforeAfter ? computedValues.m_margins.m_before : computedValues.m_margins.m_after);
|
|
}
|
|
}
|
|
|
|
// WinIE quirk: The <html> block always fills the entire canvas in quirks mode. The <body> always fills the
|
|
// <html> block in quirks mode. Only apply this quirk if the block is normal flow and no height
|
|
// is specified. When we're printing, we also need this quirk if the body or root has a percentage
|
|
// height since we don't set a height in RenderView when we're printing. So without this quirk, the
|
|
// height has nothing to be a percentage of, and it ends up being 0. That is bad.
|
|
bool paginatedContentNeedsBaseHeight = document().printing() && h.isPercentOrCalculated()
|
|
&& (isDocumentElementRenderer() || (isBody() && document().documentElement()->renderer()->style().logicalHeight().isPercentOrCalculated())) && !isInline();
|
|
if (stretchesToViewport() || paginatedContentNeedsBaseHeight) {
|
|
LayoutUnit margins = collapsedMarginBefore() + collapsedMarginAfter();
|
|
LayoutUnit visibleHeight = view().pageOrViewLogicalHeight();
|
|
if (isDocumentElementRenderer())
|
|
computedValues.m_extent = std::max(computedValues.m_extent, visibleHeight - margins);
|
|
else {
|
|
LayoutUnit marginsBordersPadding = margins + parentBox()->marginBefore() + parentBox()->marginAfter() + parentBox()->borderAndPaddingLogicalHeight();
|
|
computedValues.m_extent = std::max(computedValues.m_extent, visibleHeight - marginsBordersPadding);
|
|
}
|
|
}
|
|
return computedValues;
|
|
}
|
|
|
|
LayoutUnit RenderBox::computeLogicalHeightWithoutLayout() const
|
|
{
|
|
// FIXME:: We should probably return something other than just
|
|
// border + padding, but for now we have no good way to do anything else
|
|
// without layout, so we just use that.
|
|
LogicalExtentComputedValues computedValues = computeLogicalHeight(borderAndPaddingLogicalHeight(), 0_lu);
|
|
return computedValues.m_extent;
|
|
}
|
|
|
|
std::optional<LayoutUnit> RenderBox::computeLogicalHeightUsing(SizeType heightType, const Length& height, std::optional<LayoutUnit> intrinsicContentHeight) const
|
|
{
|
|
if (std::optional<LayoutUnit> logicalHeight = computeContentAndScrollbarLogicalHeightUsing(heightType, height, intrinsicContentHeight))
|
|
return adjustBorderBoxLogicalHeightForBoxSizing(logicalHeight.value());
|
|
return std::nullopt;
|
|
}
|
|
|
|
std::optional<LayoutUnit> RenderBox::computeContentLogicalHeight(SizeType heightType, const Length& height, std::optional<LayoutUnit> intrinsicContentHeight) const
|
|
{
|
|
if (std::optional<LayoutUnit> heightIncludingScrollbar = computeContentAndScrollbarLogicalHeightUsing(heightType, height, intrinsicContentHeight))
|
|
return std::max<LayoutUnit>(0, adjustContentBoxLogicalHeightForBoxSizing(heightIncludingScrollbar) - scrollbarLogicalHeight());
|
|
return std::nullopt;
|
|
}
|
|
|
|
std::optional<LayoutUnit> RenderBox::computeIntrinsicLogicalContentHeightUsing(Length logicalHeightLength, std::optional<LayoutUnit> intrinsicContentHeight, LayoutUnit borderAndPadding) const
|
|
{
|
|
// FIXME: The CSS sizing spec is considering changing what min-content/max-content should resolve to.
|
|
// If that happens, this code will have to change.
|
|
if (logicalHeightLength.isMinContent() || logicalHeightLength.isMaxContent() || logicalHeightLength.isFitContent() || logicalHeightLength.isLegacyIntrinsic()) {
|
|
if (intrinsicContentHeight && style().boxSizing() == BoxSizing::BorderBox)
|
|
return intrinsicContentHeight.value() + borderAndPaddingLogicalHeight();
|
|
return intrinsicContentHeight;
|
|
}
|
|
if (logicalHeightLength.isFillAvailable())
|
|
return containingBlock()->availableLogicalHeight(ExcludeMarginBorderPadding) - borderAndPadding;
|
|
ASSERT_NOT_REACHED();
|
|
return 0_lu;
|
|
}
|
|
|
|
std::optional<LayoutUnit> RenderBox::computeContentAndScrollbarLogicalHeightUsing(SizeType heightType, const Length& height, std::optional<LayoutUnit> intrinsicContentHeight) const
|
|
{
|
|
if (height.isAuto())
|
|
return heightType == MinSize ? std::optional<LayoutUnit>(0) : std::nullopt;
|
|
// FIXME: The CSS sizing spec is considering changing what min-content/max-content should resolve to.
|
|
// If that happens, this code will have to change.
|
|
if (height.isIntrinsic() || height.isLegacyIntrinsic())
|
|
return computeIntrinsicLogicalContentHeightUsing(height, intrinsicContentHeight, borderAndPaddingLogicalHeight());
|
|
if (height.isFixed())
|
|
return LayoutUnit(height.value());
|
|
if (height.isPercentOrCalculated())
|
|
return computePercentageLogicalHeight(height);
|
|
return std::nullopt;
|
|
}
|
|
|
|
bool RenderBox::skipContainingBlockForPercentHeightCalculation(const RenderBox& containingBlock, bool isPerpendicularWritingMode) const
|
|
{
|
|
// Flow threads for multicol or paged overflow should be skipped. They are invisible to the DOM,
|
|
// and percent heights of children should be resolved against the multicol or paged container.
|
|
if (containingBlock.isRenderFragmentedFlow() && !isPerpendicularWritingMode)
|
|
return true;
|
|
|
|
// Render view is not considered auto height.
|
|
if (is<RenderView>(containingBlock))
|
|
return false;
|
|
|
|
// If the writing mode of the containing block is orthogonal to ours, it means
|
|
// that we shouldn't skip anything, since we're going to resolve the
|
|
// percentage height against a containing block *width*.
|
|
if (isPerpendicularWritingMode)
|
|
return false;
|
|
|
|
// Anonymous blocks should not impede percentage resolution on a child.
|
|
// Examples of such anonymous blocks are blocks wrapped around inlines that
|
|
// have block siblings (from the CSS spec) and multicol flow threads (an
|
|
// implementation detail). Another implementation detail, ruby runs, create
|
|
// anonymous inline-blocks, so skip those too. All other types of anonymous
|
|
// objects, such as table-cells and flexboxes, will be treated as if they were
|
|
// non-anonymous.
|
|
if (containingBlock.isAnonymous())
|
|
return containingBlock.style().display() == DisplayType::Block || containingBlock.style().display() == DisplayType::InlineBlock;
|
|
|
|
// For quirks mode, we skip most auto-height containing blocks when computing
|
|
// percentages.
|
|
return document().inQuirksMode() && !containingBlock.isTableCell() && !containingBlock.isOutOfFlowPositioned() && !containingBlock.isRenderGrid() && !containingBlock.isFlexibleBoxIncludingDeprecated() && containingBlock.style().logicalHeight().isAuto();
|
|
}
|
|
|
|
bool RenderBox::shouldTreatChildAsReplacedInTableCells() const
|
|
{
|
|
if (isReplaced())
|
|
return true;
|
|
return element() && (element()->isFormControlElement() || is<HTMLImageElement>(element()));
|
|
}
|
|
|
|
static bool tableCellShouldHaveZeroInitialSize(const RenderBlock& block, const RenderBox& child, bool scrollsOverflowY)
|
|
{
|
|
// Normally we would let the cell size intrinsically, but scrolling overflow has to be
|
|
// treated differently, since WinIE lets scrolled overflow fragments shrink as needed.
|
|
// While we can't get all cases right, we can at least detect when the cell has a specified
|
|
// height or when the table has a specified height. In these cases we want to initially have
|
|
// no size and allow the flexing of the table or the cell to its specified height to cause us
|
|
// to grow to fill the space. This could end up being wrong in some cases, but it is
|
|
// preferable to the alternative (sizing intrinsically and making the row end up too big).
|
|
const RenderTableCell& cell = downcast<RenderTableCell>(block);
|
|
return scrollsOverflowY && !child.shouldTreatChildAsReplacedInTableCells() && (!cell.style().logicalHeight().isAuto() || !cell.table()->style().logicalHeight().isAuto());
|
|
}
|
|
|
|
std::optional<LayoutUnit> RenderBox::computePercentageLogicalHeight(const Length& height, UpdatePercentageHeightDescendants updateDescendants) const
|
|
{
|
|
std::optional<LayoutUnit> availableHeight;
|
|
|
|
bool skippedAutoHeightContainingBlock = false;
|
|
RenderBlock* cb = containingBlock();
|
|
const RenderBox* containingBlockChild = this;
|
|
LayoutUnit rootMarginBorderPaddingHeight;
|
|
bool isHorizontal = isHorizontalWritingMode();
|
|
while (cb && !is<RenderView>(*cb) && skipContainingBlockForPercentHeightCalculation(*cb, isHorizontal != cb->isHorizontalWritingMode())) {
|
|
if (cb->isBody() || cb->isDocumentElementRenderer())
|
|
rootMarginBorderPaddingHeight += cb->marginBefore() + cb->marginAfter() + cb->borderAndPaddingLogicalHeight();
|
|
skippedAutoHeightContainingBlock = true;
|
|
containingBlockChild = cb;
|
|
cb = cb->containingBlock();
|
|
}
|
|
if (updateDescendants == UpdatePercentageHeightDescendants::Yes)
|
|
cb->addPercentHeightDescendant(const_cast<RenderBox&>(*this));
|
|
|
|
bool isOrthogonal = isHorizontal != cb->isHorizontalWritingMode();
|
|
if (hasOverridingContainingBlockContentLogicalWidth() && isOrthogonal)
|
|
availableHeight = overridingContainingBlockContentLogicalWidth();
|
|
else if (hasOverridingContainingBlockContentLogicalHeight() && !isOrthogonal)
|
|
availableHeight = overridingContainingBlockContentLogicalHeight();
|
|
else if (isOrthogonal)
|
|
availableHeight = containingBlockChild->containingBlockLogicalWidthForContent();
|
|
else if (is<RenderTableCell>(*cb)) {
|
|
if (!skippedAutoHeightContainingBlock) {
|
|
// Table cells violate what the CSS spec says to do with heights. Basically we
|
|
// don't care if the cell specified a height or not. We just always make ourselves
|
|
// be a percentage of the cell's current content height.
|
|
if (!cb->hasOverridingLogicalHeight())
|
|
return tableCellShouldHaveZeroInitialSize(*cb, *this, scrollsOverflowY()) ? std::optional<LayoutUnit>(0) : std::nullopt;
|
|
|
|
availableHeight = cb->overridingLogicalHeight() - cb->computedCSSPaddingBefore() - cb->computedCSSPaddingAfter() - cb->borderBefore() - cb->borderAfter();
|
|
}
|
|
} else
|
|
availableHeight = cb->availableLogicalHeightForPercentageComputation();
|
|
|
|
if (!availableHeight)
|
|
return availableHeight;
|
|
|
|
LayoutUnit result = valueForLength(height, availableHeight.value() - rootMarginBorderPaddingHeight + (isTable() && isOutOfFlowPositioned() ? cb->paddingBefore() + cb->paddingAfter() : 0_lu));
|
|
|
|
// |overridingLogicalHeight| is the maximum height made available by the
|
|
// cell to its percent height children when we decide they can determine the
|
|
// height of the cell. If the percent height child is box-sizing:content-box
|
|
// then we must subtract the border and padding from the cell's
|
|
// |availableHeight| (given by |overridingLogicalHeight|) to arrive
|
|
// at the child's computed height.
|
|
bool subtractBorderAndPadding = isTable() || (is<RenderTableCell>(*cb) && !skippedAutoHeightContainingBlock && cb->hasOverridingLogicalHeight());
|
|
if (subtractBorderAndPadding) {
|
|
result -= borderAndPaddingLogicalHeight();
|
|
return std::max(0_lu, result);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
LayoutUnit RenderBox::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const
|
|
{
|
|
return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(MainOrPreferredSize, style().logicalWidth()), shouldComputePreferred);
|
|
}
|
|
|
|
LayoutUnit RenderBox::computeReplacedLogicalWidthRespectingMinMaxWidth(LayoutUnit logicalWidth, ShouldComputePreferred shouldComputePreferred) const
|
|
{
|
|
auto& logicalMinWidth = style().logicalMinWidth();
|
|
auto& logicalMaxWidth = style().logicalMaxWidth();
|
|
bool useLogicalWidthForMinWidth = (shouldComputePreferred == ComputePreferred && logicalMinWidth.isPercentOrCalculated()) || logicalMinWidth.isUndefined();
|
|
bool useLogicalWidthForMaxWidth = (shouldComputePreferred == ComputePreferred && logicalMaxWidth.isPercentOrCalculated()) || logicalMaxWidth.isUndefined();
|
|
auto minLogicalWidth = useLogicalWidthForMinWidth ? logicalWidth : computeReplacedLogicalWidthUsing(MinSize, logicalMinWidth);
|
|
auto maxLogicalWidth = useLogicalWidthForMaxWidth ? logicalWidth : computeReplacedLogicalWidthUsing(MaxSize, logicalMaxWidth);
|
|
return std::max(minLogicalWidth, std::min(logicalWidth, maxLogicalWidth));
|
|
}
|
|
|
|
LayoutUnit RenderBox::computeReplacedLogicalWidthUsing(SizeType widthType, Length logicalWidth) const
|
|
{
|
|
ASSERT(widthType == MinSize || widthType == MainOrPreferredSize || !logicalWidth.isAuto());
|
|
if (widthType == MinSize && logicalWidth.isAuto())
|
|
return adjustContentBoxLogicalWidthForBoxSizing(0, logicalWidth.type());
|
|
|
|
switch (logicalWidth.type()) {
|
|
case LengthType::Fixed:
|
|
return adjustContentBoxLogicalWidthForBoxSizing(logicalWidth);
|
|
case LengthType::MinContent:
|
|
case LengthType::MaxContent: {
|
|
// MinContent/MaxContent don't need the availableLogicalWidth argument.
|
|
LayoutUnit availableLogicalWidth;
|
|
return computeIntrinsicLogicalWidthUsing(logicalWidth, availableLogicalWidth, borderAndPaddingLogicalWidth()) - borderAndPaddingLogicalWidth();
|
|
}
|
|
case LengthType::FitContent:
|
|
case LengthType::FillAvailable:
|
|
case LengthType::Percent:
|
|
case LengthType::Calculated: {
|
|
// FIXME: containingBlockLogicalWidthForContent() is wrong if the replaced element's block-flow is perpendicular to the
|
|
// containing block's block-flow.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46496
|
|
const LayoutUnit cw = isOutOfFlowPositioned() ? containingBlockLogicalWidthForPositioned(downcast<RenderBoxModelObject>(*container())) : containingBlockLogicalWidthForContent();
|
|
Length containerLogicalWidth = containingBlock()->style().logicalWidth();
|
|
// FIXME: Handle cases when containing block width is calculated or viewport percent.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=91071
|
|
if (logicalWidth.isIntrinsic())
|
|
return computeIntrinsicLogicalWidthUsing(logicalWidth, cw, borderAndPaddingLogicalWidth()) - borderAndPaddingLogicalWidth();
|
|
if (cw > 0 || (!cw && (containerLogicalWidth.isFixed() || containerLogicalWidth.isPercentOrCalculated())))
|
|
return adjustContentBoxLogicalWidthForBoxSizing(minimumValueForLength(logicalWidth, cw), logicalWidth.type());
|
|
return 0_lu;
|
|
}
|
|
case LengthType::Intrinsic:
|
|
case LengthType::MinIntrinsic:
|
|
case LengthType::Auto:
|
|
case LengthType::Relative:
|
|
case LengthType::Undefined:
|
|
return intrinsicLogicalWidth();
|
|
}
|
|
|
|
ASSERT_NOT_REACHED();
|
|
return 0;
|
|
}
|
|
|
|
LayoutUnit RenderBox::computeReplacedLogicalHeight(std::optional<LayoutUnit>) const
|
|
{
|
|
return computeReplacedLogicalHeightRespectingMinMaxHeight(computeReplacedLogicalHeightUsing(MainOrPreferredSize, style().logicalHeight()));
|
|
}
|
|
|
|
static bool allowMinMaxPercentagesInAutoHeightBlocksQuirk()
|
|
{
|
|
#if PLATFORM(COCOA)
|
|
return CocoaApplication::isIBooks();
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
void RenderBox::computePreferredLogicalWidths()
|
|
{
|
|
ASSERT(preferredLogicalWidthsDirty());
|
|
|
|
computePreferredLogicalWidths(style().logicalMinWidth(), style().logicalMaxWidth(), borderAndPaddingLogicalWidth());
|
|
setPreferredLogicalWidthsDirty(false);
|
|
}
|
|
|
|
void RenderBox::computePreferredLogicalWidths(const Length& minWidth, const Length& maxWidth, LayoutUnit borderAndPadding)
|
|
{
|
|
if (shouldComputeLogicalHeightFromAspectRatio()) {
|
|
auto [logicalMinWidth, logicalMaxWidth] = computeMinMaxLogicalWidthFromAspectRatio();
|
|
m_minPreferredLogicalWidth = std::clamp(m_minPreferredLogicalWidth, logicalMinWidth, logicalMaxWidth);
|
|
m_maxPreferredLogicalWidth = std::clamp(m_maxPreferredLogicalWidth, logicalMinWidth, logicalMaxWidth);
|
|
}
|
|
|
|
if (maxWidth.isFixed()) {
|
|
auto adjustContentBoxLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(maxWidth);
|
|
m_maxPreferredLogicalWidth = std::min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidth);
|
|
m_minPreferredLogicalWidth = std::min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidth);
|
|
}
|
|
|
|
if (minWidth.isFixed() && minWidth.value() > 0) {
|
|
auto adjustContentBoxLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(minWidth);
|
|
m_maxPreferredLogicalWidth = std::max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidth);
|
|
m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidth);
|
|
}
|
|
|
|
m_minPreferredLogicalWidth += borderAndPadding;
|
|
m_maxPreferredLogicalWidth += borderAndPadding;
|
|
}
|
|
|
|
bool RenderBox::replacedMinMaxLogicalHeightComputesAsNone(SizeType sizeType) const
|
|
{
|
|
ASSERT(sizeType == MinSize || sizeType == MaxSize);
|
|
|
|
auto logicalHeight = sizeType == MinSize ? style().logicalMinHeight() : style().logicalMaxHeight();
|
|
auto initialLogicalHeight = sizeType == MinSize ? RenderStyle::initialMinSize() : RenderStyle::initialMaxSize();
|
|
|
|
if (logicalHeight == initialLogicalHeight)
|
|
return true;
|
|
|
|
if (logicalHeight.isPercentOrCalculated() && hasOverridingContainingBlockContentLogicalHeight())
|
|
return overridingContainingBlockContentLogicalHeight() == std::nullopt;
|
|
|
|
// Make sure % min-height and % max-height resolve to none if the containing block has auto height.
|
|
// Note that the "height" case for replaced elements was handled by hasReplacedLogicalHeight, which is why
|
|
// min and max-height are the only ones handled here.
|
|
// FIXME: For now we put in a quirk for iBooks until we can move them to viewport units.
|
|
if (auto* cb = containingBlockForAutoHeightDetection(logicalHeight))
|
|
return allowMinMaxPercentagesInAutoHeightBlocksQuirk() ? false : cb->hasAutoHeightOrContainingBlockWithAutoHeight();
|
|
|
|
return false;
|
|
}
|
|
|
|
LayoutUnit RenderBox::computeReplacedLogicalHeightRespectingMinMaxHeight(LayoutUnit logicalHeight) const
|
|
{
|
|
LayoutUnit minLogicalHeight;
|
|
if (!replacedMinMaxLogicalHeightComputesAsNone(MinSize))
|
|
minLogicalHeight = computeReplacedLogicalHeightUsing(MinSize, style().logicalMinHeight());
|
|
LayoutUnit maxLogicalHeight = logicalHeight;
|
|
if (!replacedMinMaxLogicalHeightComputesAsNone(MaxSize))
|
|
maxLogicalHeight = computeReplacedLogicalHeightUsing(MaxSize, style().logicalMaxHeight());
|
|
return std::max(minLogicalHeight, std::min(logicalHeight, maxLogicalHeight));
|
|
}
|
|
|
|
LayoutUnit RenderBox::computeReplacedLogicalHeightUsing(SizeType heightType, Length logicalHeight) const
|
|
{
|
|
ASSERT(heightType == MinSize || heightType == MainOrPreferredSize || !logicalHeight.isAuto());
|
|
if (heightType == MinSize && logicalHeight.isAuto())
|
|
return adjustContentBoxLogicalHeightForBoxSizing(std::optional<LayoutUnit>(0));
|
|
|
|
switch (logicalHeight.type()) {
|
|
case LengthType::Fixed:
|
|
return adjustContentBoxLogicalHeightForBoxSizing(LayoutUnit(logicalHeight.value()));
|
|
case LengthType::Percent:
|
|
case LengthType::Calculated: {
|
|
auto* container = isOutOfFlowPositioned() ? this->container() : containingBlock();
|
|
while (container && container->isAnonymous()) {
|
|
// Stop at rendering context root.
|
|
if (is<RenderView>(*container))
|
|
break;
|
|
container = container->containingBlock();
|
|
}
|
|
bool hasPerpendicularContainingBlock = container->isHorizontalWritingMode() != isHorizontalWritingMode();
|
|
std::optional<LayoutUnit> stretchedHeight;
|
|
if (is<RenderBlock>(container)) {
|
|
auto* block = downcast<RenderBlock>(container);
|
|
block->addPercentHeightDescendant(*const_cast<RenderBox*>(this));
|
|
if (block->isFlexItem() && downcast<RenderFlexibleBox>(block->parent())->useChildOverridingLogicalHeightForPercentageResolution(*block))
|
|
stretchedHeight = block->overridingContentLogicalHeight();
|
|
else if (block->isGridItem() && block->hasOverridingLogicalHeight() && !hasPerpendicularContainingBlock)
|
|
stretchedHeight = block->overridingContentLogicalHeight();
|
|
}
|
|
|
|
// FIXME: This calculation is not patched for block-flow yet.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46500
|
|
if (container->isOutOfFlowPositioned()
|
|
&& container->style().height().isAuto()
|
|
&& !(container->style().top().isAuto() || container->style().bottom().isAuto())) {
|
|
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(container->isRenderBlock());
|
|
auto& block = downcast<RenderBlock>(*container);
|
|
auto computedValues = block.computeLogicalHeight(block.logicalHeight(), 0);
|
|
LayoutUnit newContentHeight = computedValues.m_extent - block.borderAndPaddingLogicalHeight() - block.scrollbarLogicalHeight();
|
|
return adjustContentBoxLogicalHeightForBoxSizing(valueForLength(logicalHeight, newContentHeight));
|
|
}
|
|
|
|
// FIXME: availableLogicalHeight() is wrong if the replaced element's block-flow is perpendicular to the
|
|
// containing block's block-flow.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46496
|
|
LayoutUnit availableHeight;
|
|
if (isOutOfFlowPositioned())
|
|
availableHeight = containingBlockLogicalHeightForPositioned(downcast<RenderBoxModelObject>(*container));
|
|
else if (stretchedHeight)
|
|
availableHeight = stretchedHeight.value();
|
|
else {
|
|
availableHeight = hasPerpendicularContainingBlock ? containingBlockLogicalWidthForContent() : containingBlockLogicalHeightForContent(IncludeMarginBorderPadding);
|
|
// It is necessary to use the border-box to match WinIE's broken
|
|
// box model. This is essential for sizing inside
|
|
// table cells using percentage heights.
|
|
// FIXME: This needs to be made block-flow-aware. If the cell and image are perpendicular block-flows, this isn't right.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46997
|
|
while (container && !is<RenderView>(*container)
|
|
&& (container->style().logicalHeight().isAuto() || container->style().logicalHeight().isPercentOrCalculated())) {
|
|
if (container->isTableCell()) {
|
|
// Don't let table cells squeeze percent-height replaced elements
|
|
// <http://bugs.webkit.org/show_bug.cgi?id=15359>
|
|
availableHeight = std::max(availableHeight, intrinsicLogicalHeight());
|
|
return valueForLength(logicalHeight, availableHeight - borderAndPaddingLogicalHeight());
|
|
}
|
|
downcast<RenderBlock>(*container).addPercentHeightDescendant(const_cast<RenderBox&>(*this));
|
|
container = container->containingBlock();
|
|
}
|
|
}
|
|
return adjustContentBoxLogicalHeightForBoxSizing(valueForLength(logicalHeight, availableHeight));
|
|
}
|
|
case LengthType::MinContent:
|
|
case LengthType::MaxContent:
|
|
case LengthType::FitContent:
|
|
case LengthType::FillAvailable:
|
|
return adjustContentBoxLogicalHeightForBoxSizing(computeIntrinsicLogicalContentHeightUsing(logicalHeight, intrinsicLogicalHeight(), borderAndPaddingLogicalHeight()));
|
|
default:
|
|
return intrinsicLogicalHeight();
|
|
}
|
|
}
|
|
|
|
LayoutUnit RenderBox::availableLogicalHeight(AvailableLogicalHeightType heightType) const
|
|
{
|
|
return constrainContentBoxLogicalHeightByMinMax(availableLogicalHeightUsing(style().logicalHeight(), heightType), std::nullopt);
|
|
}
|
|
|
|
LayoutUnit RenderBox::availableLogicalHeightUsing(const Length& h, AvailableLogicalHeightType heightType) const
|
|
{
|
|
// We need to stop here, since we don't want to increase the height of the table
|
|
// artificially. We're going to rely on this cell getting expanded to some new
|
|
// height, and then when we lay out again we'll use the calculation below.
|
|
if (isTableCell() && (h.isAuto() || h.isPercentOrCalculated())) {
|
|
if (hasOverridingLogicalHeight())
|
|
return overridingLogicalHeight() - computedCSSPaddingBefore() - computedCSSPaddingAfter() - borderBefore() - borderAfter();
|
|
return logicalHeight() - borderAndPaddingLogicalHeight();
|
|
}
|
|
|
|
if (isFlexItem() && downcast<RenderFlexibleBox>(*parent()).useChildOverridingLogicalHeightForPercentageResolution(*this))
|
|
return overridingContentLogicalHeight();
|
|
|
|
if (shouldComputeLogicalHeightFromAspectRatio())
|
|
return blockSizeFromAspectRatio(horizontalBorderAndPaddingExtent(), verticalBorderAndPaddingExtent(), LayoutUnit(style().logicalAspectRatio()), style().boxSizingForAspectRatio(), logicalWidth());
|
|
|
|
if (h.isPercentOrCalculated() && isOutOfFlowPositioned() && !isRenderFragmentedFlow()) {
|
|
// FIXME: This is wrong if the containingBlock has a perpendicular writing mode.
|
|
LayoutUnit availableHeight = containingBlockLogicalHeightForPositioned(*containingBlock());
|
|
return adjustContentBoxLogicalHeightForBoxSizing(valueForLength(h, availableHeight));
|
|
}
|
|
|
|
if (std::optional<LayoutUnit> heightIncludingScrollbar = computeContentAndScrollbarLogicalHeightUsing(MainOrPreferredSize, h, std::nullopt))
|
|
return std::max<LayoutUnit>(0, adjustContentBoxLogicalHeightForBoxSizing(heightIncludingScrollbar) - scrollbarLogicalHeight());
|
|
|
|
// FIXME: Check logicalTop/logicalBottom here to correctly handle vertical writing-mode.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=46500
|
|
if (is<RenderBlock>(*this) && isOutOfFlowPositioned() && style().height().isAuto() && !(style().top().isAuto() || style().bottom().isAuto())) {
|
|
RenderBlock& block = const_cast<RenderBlock&>(downcast<RenderBlock>(*this));
|
|
auto computedValues = block.computeLogicalHeight(block.logicalHeight(), 0);
|
|
return computedValues.m_extent - block.borderAndPaddingLogicalHeight() - block.scrollbarLogicalHeight();
|
|
}
|
|
|
|
// FIXME: This is wrong if the containingBlock has a perpendicular writing mode.
|
|
LayoutUnit availableHeight = containingBlockLogicalHeightForContent(heightType);
|
|
if (heightType == ExcludeMarginBorderPadding) {
|
|
// FIXME: Margin collapsing hasn't happened yet, so this incorrectly removes collapsed margins.
|
|
availableHeight -= marginBefore() + marginAfter() + borderAndPaddingLogicalHeight();
|
|
}
|
|
return availableHeight;
|
|
}
|
|
|
|
void RenderBox::computeBlockDirectionMargins(const RenderBlock& containingBlock, LayoutUnit& marginBefore, LayoutUnit& marginAfter) const
|
|
{
|
|
if (isTableCell()) {
|
|
// FIXME: Not right if we allow cells to have different directionality than the table. If we do allow this, though,
|
|
// we may just do it with an extra anonymous block inside the cell.
|
|
marginBefore = 0;
|
|
marginAfter = 0;
|
|
return;
|
|
}
|
|
|
|
// Margins are calculated with respect to the logical width of
|
|
// the containing block (8.3)
|
|
LayoutUnit cw = containingBlockLogicalWidthForContent();
|
|
const RenderStyle& containingBlockStyle = containingBlock.style();
|
|
marginBefore = minimumValueForLength(style().marginBeforeUsing(&containingBlockStyle), cw);
|
|
marginAfter = minimumValueForLength(style().marginAfterUsing(&containingBlockStyle), cw);
|
|
}
|
|
|
|
void RenderBox::computeAndSetBlockDirectionMargins(const RenderBlock& containingBlock)
|
|
{
|
|
LayoutUnit marginBefore;
|
|
LayoutUnit marginAfter;
|
|
computeBlockDirectionMargins(containingBlock, marginBefore, marginAfter);
|
|
containingBlock.setMarginBeforeForChild(*this, marginBefore);
|
|
containingBlock.setMarginAfterForChild(*this, marginAfter);
|
|
}
|
|
|
|
LayoutUnit RenderBox::containingBlockLogicalWidthForPositioned(const RenderBoxModelObject& containingBlock, RenderFragmentContainer* fragment, bool checkForPerpendicularWritingMode) const
|
|
{
|
|
if (checkForPerpendicularWritingMode && containingBlock.isHorizontalWritingMode() != isHorizontalWritingMode())
|
|
return containingBlockLogicalHeightForPositioned(containingBlock, false);
|
|
|
|
if (hasOverridingContainingBlockContentLogicalWidth()) {
|
|
if (auto width = overridingContainingBlockContentLogicalWidth())
|
|
return width.value();
|
|
}
|
|
|
|
if (is<RenderBox>(containingBlock)) {
|
|
bool isFixedPosition = isFixedPositioned();
|
|
|
|
RenderFragmentedFlow* fragmentedFlow = enclosingFragmentedFlow();
|
|
if (!fragmentedFlow) {
|
|
if (isFixedPosition && is<RenderView>(containingBlock))
|
|
return downcast<RenderView>(containingBlock).clientLogicalWidthForFixedPosition();
|
|
|
|
return downcast<RenderBox>(containingBlock).clientLogicalWidth();
|
|
}
|
|
|
|
if (!is<RenderBlock>(containingBlock))
|
|
return downcast<RenderBox>(containingBlock).clientLogicalWidth();
|
|
|
|
const RenderBlock& cb = downcast<RenderBlock>(containingBlock);
|
|
RenderBoxFragmentInfo* boxInfo = nullptr;
|
|
if (!fragment) {
|
|
if (is<RenderFragmentedFlow>(containingBlock) && !checkForPerpendicularWritingMode)
|
|
return downcast<RenderFragmentedFlow>(containingBlock).contentLogicalWidthOfFirstFragment();
|
|
if (isWritingModeRoot()) {
|
|
LayoutUnit cbPageOffset = cb.offsetFromLogicalTopOfFirstPage();
|
|
RenderFragmentContainer* cbFragment = cb.fragmentAtBlockOffset(cbPageOffset);
|
|
if (cbFragment)
|
|
boxInfo = cb.renderBoxFragmentInfo(cbFragment);
|
|
}
|
|
} else if (fragmentedFlow->isHorizontalWritingMode() == containingBlock.isHorizontalWritingMode()) {
|
|
RenderFragmentContainer* containingBlockFragment = cb.clampToStartAndEndFragments(fragment);
|
|
boxInfo = cb.renderBoxFragmentInfo(containingBlockFragment);
|
|
}
|
|
return (boxInfo) ? std::max<LayoutUnit>(0, cb.clientLogicalWidth() - (cb.logicalWidth() - boxInfo->logicalWidth())) : cb.clientLogicalWidth();
|
|
}
|
|
|
|
ASSERT(containingBlock.isInFlowPositioned());
|
|
|
|
const auto& flow = downcast<RenderInline>(containingBlock);
|
|
LegacyInlineFlowBox* first = flow.firstLineBox();
|
|
LegacyInlineFlowBox* last = flow.lastLineBox();
|
|
|
|
// If the containing block is empty, return a width of 0.
|
|
if (!first || !last)
|
|
return 0;
|
|
|
|
LayoutUnit fromLeft;
|
|
LayoutUnit fromRight;
|
|
if (containingBlock.style().isLeftToRightDirection()) {
|
|
fromLeft = first->logicalLeft() + first->borderLogicalLeft();
|
|
fromRight = last->logicalLeft() + last->logicalWidth() - last->borderLogicalRight();
|
|
} else {
|
|
fromRight = first->logicalLeft() + first->logicalWidth() - first->borderLogicalRight();
|
|
fromLeft = last->logicalLeft() + last->borderLogicalLeft();
|
|
}
|
|
|
|
return std::max<LayoutUnit>(0, fromRight - fromLeft);
|
|
}
|
|
|
|
LayoutUnit RenderBox::containingBlockLogicalHeightForPositioned(const RenderBoxModelObject& containingBlock, bool checkForPerpendicularWritingMode) const
|
|
{
|
|
if (checkForPerpendicularWritingMode && containingBlock.isHorizontalWritingMode() != isHorizontalWritingMode())
|
|
return containingBlockLogicalWidthForPositioned(containingBlock, nullptr, false);
|
|
|
|
if (hasOverridingContainingBlockContentLogicalHeight()) {
|
|
if (auto height = overridingContainingBlockContentLogicalHeight())
|
|
return height.value();
|
|
}
|
|
|
|
if (containingBlock.isBox()) {
|
|
bool isFixedPosition = isFixedPositioned();
|
|
|
|
if (isFixedPosition && is<RenderView>(containingBlock))
|
|
return downcast<RenderView>(containingBlock).clientLogicalHeightForFixedPosition();
|
|
|
|
const RenderBlock& cb = is<RenderBlock>(containingBlock) ? downcast<RenderBlock>(containingBlock) : *containingBlock.containingBlock();
|
|
LayoutUnit result = cb.clientLogicalHeight();
|
|
RenderFragmentedFlow* fragmentedFlow = enclosingFragmentedFlow();
|
|
if (fragmentedFlow && is<RenderFragmentedFlow>(containingBlock) && fragmentedFlow->isHorizontalWritingMode() == containingBlock.isHorizontalWritingMode())
|
|
return downcast<RenderFragmentedFlow>(containingBlock).contentLogicalHeightOfFirstFragment();
|
|
return result;
|
|
}
|
|
|
|
ASSERT(containingBlock.isInFlowPositioned());
|
|
|
|
const auto& flow = downcast<RenderInline>(containingBlock);
|
|
LegacyInlineFlowBox* first = flow.firstLineBox();
|
|
LegacyInlineFlowBox* last = flow.lastLineBox();
|
|
|
|
// If the containing block is empty, return a height of 0.
|
|
if (!first || !last)
|
|
return 0;
|
|
|
|
LayoutUnit heightResult;
|
|
LayoutRect boundingBox = flow.linesBoundingBox();
|
|
if (containingBlock.isHorizontalWritingMode())
|
|
heightResult = boundingBox.height();
|
|
else
|
|
heightResult = boundingBox.width();
|
|
heightResult -= (containingBlock.borderBefore() + containingBlock.borderAfter());
|
|
return heightResult;
|
|
}
|
|
|
|
static inline bool isVerticalLRChildInHorizontalTBParent(const RenderBox& child, RenderObject& parent)
|
|
{
|
|
return !child.isHorizontalWritingMode() && child.style().isFlippedLinesWritingMode() && parent.isHorizontalWritingMode() && !parent.style().isFlippedBlocksWritingMode();
|
|
}
|
|
|
|
static void computeInlineStaticDistance(Length& logicalLeft, Length& logicalRight, const RenderBox* child, const RenderBoxModelObject& containerBlock, LayoutUnit containerLogicalWidth, RenderFragmentContainer* fragment)
|
|
{
|
|
if (!logicalLeft.isAuto() || !logicalRight.isAuto())
|
|
return;
|
|
|
|
RenderObject* parent = child->parent();
|
|
TextDirection parentDirection = parent->style().direction();
|
|
|
|
// This method is using enclosingBox() which is wrong for absolutely
|
|
// positioned grid items, as they rely on the grid area. So for grid items if
|
|
// both "left" and "right" properties are "auto", we can consider that one of
|
|
// them (depending on the direction) is simply "0".
|
|
if (parent->isRenderGrid() && parent == child->containingBlock()) {
|
|
if (parentDirection == TextDirection::LTR)
|
|
logicalLeft.setValue(LengthType::Fixed, 0);
|
|
else
|
|
logicalRight.setValue(LengthType::Fixed, 0);
|
|
return;
|
|
}
|
|
|
|
// FIXME: The static distance computation has not been fully patched for mixed writing modes yet.
|
|
if (parentDirection == TextDirection::LTR) {
|
|
LayoutUnit staticPosition = isVerticalLRChildInHorizontalTBParent(*child, *parent) ? child->layer()->staticBlockPosition() - containerBlock.borderBefore() : child->layer()->staticInlinePosition() - containerBlock.borderLogicalLeft();
|
|
for (auto* current = parent; current && current != &containerBlock; current = current->container()) {
|
|
if (!is<RenderBox>(*current))
|
|
continue;
|
|
const auto& renderBox = downcast<RenderBox>(*current);
|
|
staticPosition += isVerticalLRChildInHorizontalTBParent(*child, *parent) ? renderBox.logicalTop() : renderBox.logicalLeft();
|
|
if (renderBox.isInFlowPositioned())
|
|
staticPosition += renderBox.isHorizontalWritingMode() ? renderBox.offsetForInFlowPosition().width() : renderBox.offsetForInFlowPosition().height();
|
|
if (fragment && is<RenderBlock>(*current)) {
|
|
const RenderBlock& currentBlock = downcast<RenderBlock>(*current);
|
|
fragment = currentBlock.clampToStartAndEndFragments(fragment);
|
|
RenderBoxFragmentInfo* boxInfo = currentBlock.renderBoxFragmentInfo(fragment);
|
|
if (boxInfo)
|
|
staticPosition += boxInfo->logicalLeft();
|
|
}
|
|
}
|
|
logicalLeft.setValue(LengthType::Fixed, staticPosition);
|
|
} else {
|
|
LayoutUnit staticPosition = child->layer()->staticInlinePosition() + containerLogicalWidth + containerBlock.borderLogicalLeft();
|
|
auto& enclosingBox = parent->enclosingBox();
|
|
if (&enclosingBox != &containerBlock && containerBlock.isDescendantOf(&enclosingBox)) {
|
|
logicalRight.setValue(LengthType::Fixed, staticPosition);
|
|
return;
|
|
}
|
|
|
|
staticPosition -= enclosingBox.logicalWidth();
|
|
for (const RenderElement* current = &enclosingBox; current; current = current->container()) {
|
|
if (!is<RenderBox>(*current))
|
|
continue;
|
|
|
|
if (current != &containerBlock) {
|
|
auto& renderBox = downcast<RenderBox>(*current);
|
|
staticPosition -= renderBox.logicalLeft();
|
|
if (renderBox.isInFlowPositioned())
|
|
staticPosition -= renderBox.isHorizontalWritingMode() ? renderBox.offsetForInFlowPosition().width() : renderBox.offsetForInFlowPosition().height();
|
|
}
|
|
if (fragment && is<RenderBlock>(*current)) {
|
|
auto& currentBlock = downcast<RenderBlock>(*current);
|
|
fragment = currentBlock.clampToStartAndEndFragments(fragment);
|
|
RenderBoxFragmentInfo* boxInfo = currentBlock.renderBoxFragmentInfo(fragment);
|
|
if (boxInfo) {
|
|
if (current != &containerBlock)
|
|
staticPosition -= currentBlock.logicalWidth() - (boxInfo->logicalLeft() + boxInfo->logicalWidth());
|
|
if (current == &enclosingBox)
|
|
staticPosition += enclosingBox.logicalWidth() - boxInfo->logicalWidth();
|
|
}
|
|
}
|
|
if (current == &containerBlock)
|
|
break;
|
|
}
|
|
logicalRight.setValue(LengthType::Fixed, staticPosition);
|
|
}
|
|
}
|
|
|
|
void RenderBox::computePositionedLogicalWidth(LogicalExtentComputedValues& computedValues, RenderFragmentContainer* fragment) const
|
|
{
|
|
if (isReplaced()) {
|
|
// FIXME: Positioned replaced elements inside a flow thread are not working properly
|
|
// with variable width fragments (see https://bugs.webkit.org/show_bug.cgi?id=69896 ).
|
|
computePositionedLogicalWidthReplaced(computedValues);
|
|
return;
|
|
}
|
|
|
|
// QUESTIONS
|
|
// FIXME 1: Should we still deal with these the cases of 'left' or 'right' having
|
|
// the type 'static' in determining whether to calculate the static distance?
|
|
// NOTE: 'static' is not a legal value for 'left' or 'right' as of CSS 2.1.
|
|
|
|
// FIXME 2: Can perhaps optimize out cases when max-width/min-width are greater
|
|
// than or less than the computed width(). Be careful of box-sizing and
|
|
// percentage issues.
|
|
|
|
// The following is based off of the W3C Working Draft from April 11, 2006 of
|
|
// CSS 2.1: Section 10.3.7 "Absolutely positioned, non-replaced elements"
|
|
// <http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width>
|
|
// (block-style-comments in this function and in computePositionedLogicalWidthUsing()
|
|
// correspond to text from the spec)
|
|
|
|
|
|
// We don't use containingBlock(), since we may be positioned by an enclosing
|
|
// relative positioned inline.
|
|
const RenderBoxModelObject& containerBlock = downcast<RenderBoxModelObject>(*container());
|
|
|
|
const LayoutUnit containerLogicalWidth = containingBlockLogicalWidthForPositioned(containerBlock, fragment);
|
|
|
|
// Use the container block's direction except when calculating the static distance
|
|
// This conforms with the reference results for abspos-replaced-width-margin-000.htm
|
|
// of the CSS 2.1 test suite
|
|
TextDirection containerDirection = containerBlock.style().direction();
|
|
|
|
bool isHorizontal = isHorizontalWritingMode();
|
|
const LayoutUnit bordersPlusPadding = borderAndPaddingLogicalWidth();
|
|
const Length marginLogicalLeft = isHorizontal ? style().marginLeft() : style().marginTop();
|
|
const Length marginLogicalRight = isHorizontal ? style().marginRight() : style().marginBottom();
|
|
|
|
Length logicalLeftLength = style().logicalLeft();
|
|
Length logicalRightLength = style().logicalRight();
|
|
|
|
/*---------------------------------------------------------------------------*\
|
|
* For the purposes of this section and the next, the term "static position"
|
|
* (of an element) refers, roughly, to the position an element would have had
|
|
* in the normal flow. More precisely:
|
|
*
|
|
* * The static position for 'left' is the distance from the left edge of the
|
|
* containing block to the left margin edge of a hypothetical box that would
|
|
* have been the first box of the element if its 'position' property had
|
|
* been 'static' and 'float' had been 'none'. The value is negative if the
|
|
* hypothetical box is to the left of the containing block.
|
|
* * The static position for 'right' is the distance from the right edge of the
|
|
* containing block to the right margin edge of the same hypothetical box as
|
|
* above. The value is positive if the hypothetical box is to the left of the
|
|
* containing block's edge.
|
|
*
|
|
* But rather than actually calculating the dimensions of that hypothetical box,
|
|
* user agents are free to make a guess at its probable position.
|
|
*
|
|
* For the purposes of calculating the static position, the containing block of
|
|
* fixed positioned elements is the initial containing block instead of the
|
|
* viewport, and all scrollable boxes should be assumed to be scrolled to their
|
|
* origin.
|
|
\*---------------------------------------------------------------------------*/
|
|
|
|
// see FIXME 1
|
|
// Calculate the static distance if needed.
|
|
computeInlineStaticDistance(logicalLeftLength, logicalRightLength, this, containerBlock, containerLogicalWidth, fragment);
|
|
|
|
// Calculate constraint equation values for 'width' case.
|
|
computePositionedLogicalWidthUsing(MainOrPreferredSize, style().logicalWidth(), containerBlock, containerDirection,
|
|
containerLogicalWidth, bordersPlusPadding,
|
|
logicalLeftLength, logicalRightLength, marginLogicalLeft, marginLogicalRight,
|
|
computedValues);
|
|
|
|
LayoutUnit transferredMinSize = LayoutUnit::min();
|
|
LayoutUnit transferredMaxSize = LayoutUnit::max();
|
|
if (shouldComputeLogicalHeightFromAspectRatio())
|
|
std::tie(transferredMinSize, transferredMaxSize) = computeMinMaxLogicalWidthFromAspectRatio();
|
|
|
|
LogicalExtentComputedValues maxValues;
|
|
maxValues.m_extent = LayoutUnit::max();
|
|
// Calculate constraint equation values for 'max-width' case.
|
|
if (!style().logicalMaxWidth().isUndefined()) {
|
|
computePositionedLogicalWidthUsing(MaxSize, style().logicalMaxWidth(), containerBlock, containerDirection,
|
|
containerLogicalWidth, bordersPlusPadding,
|
|
logicalLeftLength, logicalRightLength, marginLogicalLeft, marginLogicalRight,
|
|
maxValues);
|
|
}
|
|
if (transferredMaxSize < maxValues.m_extent) {
|
|
computePositionedLogicalWidthUsing(MaxSize, Length(transferredMaxSize, LengthType::Fixed), containerBlock, containerDirection,
|
|
containerLogicalWidth, bordersPlusPadding,
|
|
logicalLeftLength, logicalRightLength, marginLogicalLeft, marginLogicalRight,
|
|
maxValues);
|
|
}
|
|
if (computedValues.m_extent > maxValues.m_extent) {
|
|
computedValues.m_extent = maxValues.m_extent;
|
|
computedValues.m_position = maxValues.m_position;
|
|
computedValues.m_margins.m_start = maxValues.m_margins.m_start;
|
|
computedValues.m_margins.m_end = maxValues.m_margins.m_end;
|
|
}
|
|
|
|
LogicalExtentComputedValues minValues;
|
|
minValues.m_extent = LayoutUnit::min();
|
|
// Calculate constraint equation values for 'min-width' case.
|
|
if (!style().logicalMinWidth().isZero() || style().logicalMinWidth().isIntrinsic()) {
|
|
computePositionedLogicalWidthUsing(MinSize, style().logicalMinWidth(), containerBlock, containerDirection,
|
|
containerLogicalWidth, bordersPlusPadding,
|
|
logicalLeftLength, logicalRightLength, marginLogicalLeft, marginLogicalRight,
|
|
minValues);
|
|
}
|
|
if (transferredMinSize > minValues.m_extent) {
|
|
computePositionedLogicalWidthUsing(MinSize, Length(transferredMinSize, LengthType::Fixed), containerBlock, containerDirection,
|
|
containerLogicalWidth, bordersPlusPadding,
|
|
logicalLeftLength, logicalRightLength, marginLogicalLeft, marginLogicalRight,
|
|
minValues);
|
|
}
|
|
if (computedValues.m_extent < minValues.m_extent) {
|
|
computedValues.m_extent = minValues.m_extent;
|
|
computedValues.m_position = minValues.m_position;
|
|
computedValues.m_margins.m_start = minValues.m_margins.m_start;
|
|
computedValues.m_margins.m_end = minValues.m_margins.m_end;
|
|
}
|
|
|
|
computedValues.m_extent += bordersPlusPadding;
|
|
if (is<RenderBox>(containerBlock)) {
|
|
auto& containingBox = downcast<RenderBox>(containerBlock);
|
|
if (containingBox.shouldPlaceVerticalScrollbarOnLeft() && isHorizontalWritingMode())
|
|
computedValues.m_position += containingBox.verticalScrollbarWidth();
|
|
}
|
|
|
|
// Adjust logicalLeft if we need to for the flipped version of our writing mode in fragments.
|
|
// FIXME: Add support for other types of objects as containerBlock, not only RenderBlock.
|
|
RenderFragmentedFlow* fragmentedFlow = enclosingFragmentedFlow();
|
|
if (fragmentedFlow && !fragment && isWritingModeRoot() && isHorizontalWritingMode() == containerBlock.isHorizontalWritingMode() && is<RenderBlock>(containerBlock)) {
|
|
ASSERT(containerBlock.canHaveBoxInfoInFragment());
|
|
LayoutUnit logicalLeftPos = computedValues.m_position;
|
|
const RenderBlock& renderBlock = downcast<RenderBlock>(containerBlock);
|
|
LayoutUnit cbPageOffset = renderBlock.offsetFromLogicalTopOfFirstPage();
|
|
RenderFragmentContainer* cbFragment = renderBlock.fragmentAtBlockOffset(cbPageOffset);
|
|
if (cbFragment) {
|
|
RenderBoxFragmentInfo* boxInfo = renderBlock.renderBoxFragmentInfo(cbFragment);
|
|
if (boxInfo) {
|
|
logicalLeftPos += boxInfo->logicalLeft();
|
|
computedValues.m_position = logicalLeftPos;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void computeLogicalLeftPositionedOffset(LayoutUnit& logicalLeftPos, const RenderBox* child, LayoutUnit logicalWidthValue, const RenderBoxModelObject& containerBlock, LayoutUnit containerLogicalWidth)
|
|
{
|
|
// Deal with differing writing modes here. Our offset needs to be in the containing block's coordinate space. If the containing block is flipped
|
|
// along this axis, then we need to flip the coordinate. This can only happen if the containing block is both a flipped mode and perpendicular to us.
|
|
if (containerBlock.isHorizontalWritingMode() != child->isHorizontalWritingMode() && containerBlock.style().isFlippedBlocksWritingMode()) {
|
|
logicalLeftPos = containerLogicalWidth - logicalWidthValue - logicalLeftPos;
|
|
logicalLeftPos += (child->isHorizontalWritingMode() ? containerBlock.borderRight() : containerBlock.borderBottom());
|
|
} else
|
|
logicalLeftPos += (child->isHorizontalWritingMode() ? containerBlock.borderLeft() : containerBlock.borderTop());
|
|
}
|
|
|
|
void RenderBox::computePositionedLogicalWidthUsing(SizeType widthType, Length logicalWidth, const RenderBoxModelObject& containerBlock, TextDirection containerDirection,
|
|
LayoutUnit containerLogicalWidth, LayoutUnit bordersPlusPadding,
|
|
Length logicalLeft, Length logicalRight, Length marginLogicalLeft, Length marginLogicalRight,
|
|
LogicalExtentComputedValues& computedValues) const
|
|
{
|
|
ASSERT(widthType == MinSize || widthType == MainOrPreferredSize || !logicalWidth.isAuto());
|
|
auto originalLogicalWidthType = logicalWidth.type();
|
|
if (widthType == MinSize && logicalWidth.isAuto()) {
|
|
if (shouldComputeLogicalWidthFromAspectRatio()) {
|
|
LayoutUnit minLogicalWidth;
|
|
LayoutUnit maxLogicalWidth;
|
|
computeIntrinsicLogicalWidths(minLogicalWidth, maxLogicalWidth);
|
|
logicalWidth = Length(minLogicalWidth, LengthType::Fixed);
|
|
} else
|
|
logicalWidth = Length(0, LengthType::Fixed);
|
|
} else if (widthType == MainOrPreferredSize && logicalWidth.isAuto() && shouldComputeLogicalWidthFromAspectRatio())
|
|
logicalWidth = Length(computeLogicalWidthFromAspectRatio(), LengthType::Fixed);
|
|
else if (logicalWidth.isIntrinsic())
|
|
logicalWidth = Length(computeIntrinsicLogicalWidthUsing(logicalWidth, containerLogicalWidth, bordersPlusPadding) - bordersPlusPadding, LengthType::Fixed);
|
|
|
|
// 'left' and 'right' cannot both be 'auto' because one would of been
|
|
// converted to the static position already
|
|
ASSERT(!(logicalLeft.isAuto() && logicalRight.isAuto()));
|
|
|
|
LayoutUnit logicalLeftValue;
|
|
|
|
const LayoutUnit containerRelativeLogicalWidth = containingBlockLogicalWidthForPositioned(containerBlock, nullptr, false);
|
|
|
|
bool logicalWidthIsAuto = logicalWidth.isIntrinsicOrAuto() && !shouldComputeLogicalWidthFromAspectRatio();
|
|
bool logicalLeftIsAuto = logicalLeft.isAuto();
|
|
bool logicalRightIsAuto = logicalRight.isAuto();
|
|
LayoutUnit& marginLogicalLeftValue = style().isLeftToRightDirection() ? computedValues.m_margins.m_start : computedValues.m_margins.m_end;
|
|
LayoutUnit& marginLogicalRightValue = style().isLeftToRightDirection() ? computedValues.m_margins.m_end : computedValues.m_margins.m_start;
|
|
|
|
if (!logicalLeftIsAuto && !logicalWidthIsAuto && !logicalRightIsAuto) {
|
|
/*-----------------------------------------------------------------------*\
|
|
* If none of the three is 'auto': If both 'margin-left' and 'margin-
|
|
* right' are 'auto', solve the equation under the extra constraint that
|
|
* the two margins get equal values, unless this would make them negative,
|
|
* in which case when direction of the containing block is 'ltr' ('rtl'),
|
|
* set 'margin-left' ('margin-right') to zero and solve for 'margin-right'
|
|
* ('margin-left'). If one of 'margin-left' or 'margin-right' is 'auto',
|
|
* solve the equation for that value. If the values are over-constrained,
|
|
* ignore the value for 'left' (in case the 'direction' property of the
|
|
* containing block is 'rtl') or 'right' (in case 'direction' is 'ltr')
|
|
* and solve for that value.
|
|
\*-----------------------------------------------------------------------*/
|
|
// NOTE: It is not necessary to solve for 'right' in the over constrained
|
|
// case because the value is not used for any further calculations.
|
|
|
|
logicalLeftValue = valueForLength(logicalLeft, containerLogicalWidth);
|
|
computedValues.m_extent = adjustContentBoxLogicalWidthForBoxSizing(valueForLength(logicalWidth, containerLogicalWidth), originalLogicalWidthType);
|
|
|
|
const LayoutUnit availableSpace = containerLogicalWidth - (logicalLeftValue + computedValues.m_extent + valueForLength(logicalRight, containerLogicalWidth) + bordersPlusPadding);
|
|
|
|
// Margins are now the only unknown
|
|
if (marginLogicalLeft.isAuto() && marginLogicalRight.isAuto()) {
|
|
// Both margins auto, solve for equality
|
|
if (availableSpace >= 0) {
|
|
marginLogicalLeftValue = availableSpace / 2; // split the difference
|
|
marginLogicalRightValue = availableSpace - marginLogicalLeftValue; // account for odd valued differences
|
|
} else {
|
|
// Use the containing block's direction rather than the parent block's
|
|
// per CSS 2.1 reference test abspos-non-replaced-width-margin-000.
|
|
if (containerDirection == TextDirection::LTR) {
|
|
marginLogicalLeftValue = 0;
|
|
marginLogicalRightValue = availableSpace; // will be negative
|
|
} else {
|
|
marginLogicalLeftValue = availableSpace; // will be negative
|
|
marginLogicalRightValue = 0;
|
|
}
|
|
}
|
|
} else if (marginLogicalLeft.isAuto()) {
|
|
// Solve for left margin
|
|
marginLogicalRightValue = valueForLength(marginLogicalRight, containerRelativeLogicalWidth);
|
|
marginLogicalLeftValue = availableSpace - marginLogicalRightValue;
|
|
} else if (marginLogicalRight.isAuto()) {
|
|
// Solve for right margin
|
|
marginLogicalLeftValue = valueForLength(marginLogicalLeft, containerRelativeLogicalWidth);
|
|
marginLogicalRightValue = availableSpace - marginLogicalLeftValue;
|
|
} else {
|
|
// Over-constrained, solve for left if direction is RTL
|
|
marginLogicalLeftValue = valueForLength(marginLogicalLeft, containerRelativeLogicalWidth);
|
|
marginLogicalRightValue = valueForLength(marginLogicalRight, containerRelativeLogicalWidth);
|
|
|
|
// Use the containing block's direction rather than the parent block's
|
|
// per CSS 2.1 reference test abspos-non-replaced-width-margin-000.
|
|
if (containerDirection == TextDirection::RTL)
|
|
logicalLeftValue = (availableSpace + logicalLeftValue) - marginLogicalLeftValue - marginLogicalRightValue;
|
|
}
|
|
} else {
|
|
/*--------------------------------------------------------------------*\
|
|
* Otherwise, set 'auto' values for 'margin-left' and 'margin-right'
|
|
* to 0, and pick the one of the following six rules that applies.
|
|
*
|
|
* 1. 'left' and 'width' are 'auto' and 'right' is not 'auto', then the
|
|
* width is shrink-to-fit. Then solve for 'left'
|
|
*
|
|
* OMIT RULE 2 AS IT SHOULD NEVER BE HIT
|
|
* ------------------------------------------------------------------
|
|
* 2. 'left' and 'right' are 'auto' and 'width' is not 'auto', then if
|
|
* the 'direction' property of the containing block is 'ltr' set
|
|
* 'left' to the static position, otherwise set 'right' to the
|
|
* static position. Then solve for 'left' (if 'direction is 'rtl')
|
|
* or 'right' (if 'direction' is 'ltr').
|
|
* ------------------------------------------------------------------
|
|
*
|
|
* 3. 'width' and 'right' are 'auto' and 'left' is not 'auto', then the
|
|
* width is shrink-to-fit . Then solve for 'right'
|
|
* 4. 'left' is 'auto', 'width' and 'right' are not 'auto', then solve
|
|
* for 'left'
|
|
* 5. 'width' is 'auto', 'left' and 'right' are not 'auto', then solve
|
|
* for 'width'
|
|
* 6. 'right' is 'auto', 'left' and 'width' are not 'auto', then solve
|
|
* for 'right'
|
|
*
|
|
* Calculation of the shrink-to-fit width is similar to calculating the
|
|
* width of a table cell using the automatic table layout algorithm.
|
|
* Roughly: calculate the preferred width by formatting the content
|
|
* without breaking lines other than where explicit line breaks occur,
|
|
* and also calculate the preferred minimum width, e.g., by trying all
|
|
* possible line breaks. CSS 2.1 does not define the exact algorithm.
|
|
* Thirdly, calculate the available width: this is found by solving
|
|
* for 'width' after setting 'left' (in case 1) or 'right' (in case 3)
|
|
* to 0.
|
|
*
|
|
* Then the shrink-to-fit width is:
|
|
* min(max(preferred minimum width, available width), preferred width).
|
|
\*--------------------------------------------------------------------*/
|
|
// NOTE: For rules 3 and 6 it is not necessary to solve for 'right'
|
|
// because the value is not used for any further calculations.
|
|
|
|
// Calculate margins, 'auto' margins are ignored.
|
|
marginLogicalLeftValue = minimumValueForLength(marginLogicalLeft, containerRelativeLogicalWidth);
|
|
marginLogicalRightValue = minimumValueForLength(marginLogicalRight, containerRelativeLogicalWidth);
|
|
|
|
const LayoutUnit availableSpace = containerLogicalWidth - (marginLogicalLeftValue + marginLogicalRightValue + bordersPlusPadding);
|
|
|
|
// FIXME: Is there a faster way to find the correct case?
|
|
// Use rule/case that applies.
|
|
if (logicalLeftIsAuto && logicalWidthIsAuto && !logicalRightIsAuto) {
|
|
// RULE 1: (use shrink-to-fit for width, and solve of left)
|
|
LayoutUnit logicalRightValue = valueForLength(logicalRight, containerLogicalWidth);
|
|
|
|
// FIXME: would it be better to have shrink-to-fit in one step?
|
|
LayoutUnit preferredWidth = maxPreferredLogicalWidth() - bordersPlusPadding;
|
|
LayoutUnit preferredMinWidth = minPreferredLogicalWidth() - bordersPlusPadding;
|
|
LayoutUnit availableWidth = availableSpace - logicalRightValue;
|
|
computedValues.m_extent = std::min(std::max(preferredMinWidth, availableWidth), preferredWidth);
|
|
logicalLeftValue = availableSpace - (computedValues.m_extent + logicalRightValue);
|
|
} else if (!logicalLeftIsAuto && logicalWidthIsAuto && logicalRightIsAuto) {
|
|
// RULE 3: (use shrink-to-fit for width, and no need solve of right)
|
|
logicalLeftValue = valueForLength(logicalLeft, containerLogicalWidth);
|
|
|
|
// FIXME: would it be better to have shrink-to-fit in one step?
|
|
LayoutUnit preferredWidth = maxPreferredLogicalWidth() - bordersPlusPadding;
|
|
LayoutUnit preferredMinWidth = minPreferredLogicalWidth() - bordersPlusPadding;
|
|
LayoutUnit availableWidth = availableSpace - logicalLeftValue;
|
|
computedValues.m_extent = std::min(std::max(preferredMinWidth, availableWidth), preferredWidth);
|
|
} else if (logicalLeftIsAuto && !logicalWidthIsAuto && !logicalRightIsAuto) {
|
|
// RULE 4: (solve for left)
|
|
computedValues.m_extent = adjustContentBoxLogicalWidthForBoxSizing(valueForLength(logicalWidth, containerLogicalWidth), originalLogicalWidthType);
|
|
logicalLeftValue = availableSpace - (computedValues.m_extent + valueForLength(logicalRight, containerLogicalWidth));
|
|
} else if (!logicalLeftIsAuto && logicalWidthIsAuto && !logicalRightIsAuto) {
|
|
// RULE 5: (solve for width)
|
|
logicalLeftValue = valueForLength(logicalLeft, containerLogicalWidth);
|
|
computedValues.m_extent = availableSpace - (logicalLeftValue + valueForLength(logicalRight, containerLogicalWidth));
|
|
} else if (!logicalLeftIsAuto && !logicalWidthIsAuto && logicalRightIsAuto) {
|
|
// RULE 6: (no need solve for right)
|
|
logicalLeftValue = valueForLength(logicalLeft, containerLogicalWidth);
|
|
computedValues.m_extent = adjustContentBoxLogicalWidthForBoxSizing(valueForLength(logicalWidth, containerLogicalWidth), originalLogicalWidthType);
|
|
}
|
|
}
|
|
|
|
// Use computed values to calculate the horizontal position.
|
|
|
|
// FIXME: This hack is needed to calculate the logical left position for a 'rtl' relatively
|
|
// positioned, inline because right now, it is using the logical left position
|
|
// of the first line box when really it should use the last line box. When
|
|
// this is fixed elsewhere, this block should be removed.
|
|
if (is<RenderInline>(containerBlock) && !containerBlock.style().isLeftToRightDirection()) {
|
|
const auto& flow = downcast<RenderInline>(containerBlock);
|
|
LegacyInlineFlowBox* firstLine = flow.firstLineBox();
|
|
LegacyInlineFlowBox* lastLine = flow.lastLineBox();
|
|
if (firstLine && lastLine && firstLine != lastLine) {
|
|
computedValues.m_position = logicalLeftValue + marginLogicalLeftValue + lastLine->borderLogicalLeft() + (lastLine->logicalLeft() - firstLine->logicalLeft());
|
|
return;
|
|
}
|
|
}
|
|
|
|
computedValues.m_position = logicalLeftValue + marginLogicalLeftValue;
|
|
computeLogicalLeftPositionedOffset(computedValues.m_position, this, computedValues.m_extent + bordersPlusPadding, containerBlock, containerLogicalWidth);
|
|
}
|
|
|
|
static void computeBlockStaticDistance(Length& logicalTop, Length& logicalBottom, const RenderBox* child, const RenderBoxModelObject& containerBlock)
|
|
{
|
|
if (!logicalTop.isAuto() || !logicalBottom.isAuto())
|
|
return;
|
|
|
|
RenderObject* parent = child->parent();
|
|
bool isParentDirectionLTR = parent->style().direction() == TextDirection::LTR;
|
|
|
|
// FIXME: The static distance computation has not been fully patched for mixed writing modes.
|
|
LayoutUnit staticLogicalTop = isVerticalLRChildInHorizontalTBParent(*child, *parent) && isParentDirectionLTR ? child->layer()->staticInlinePosition() - containerBlock.borderLogicalLeft() : child->layer()->staticBlockPosition() - containerBlock.borderBefore();
|
|
for (RenderElement* container = child->parent(); container && container != &containerBlock; container = container->container()) {
|
|
if (!is<RenderBox>(*container))
|
|
continue;
|
|
const auto& renderBox = downcast<RenderBox>(*container);
|
|
if (!is<RenderTableRow>(renderBox))
|
|
staticLogicalTop += isVerticalLRChildInHorizontalTBParent(*child, *parent) && isParentDirectionLTR ? renderBox.logicalLeft() : renderBox.logicalTop();
|
|
if (renderBox.isInFlowPositioned())
|
|
staticLogicalTop += renderBox.isHorizontalWritingMode() ? renderBox.offsetForInFlowPosition().height() : renderBox.offsetForInFlowPosition().width();
|
|
}
|
|
logicalTop.setValue(LengthType::Fixed, staticLogicalTop);
|
|
}
|
|
|
|
void RenderBox::computePositionedLogicalHeight(LogicalExtentComputedValues& computedValues) const
|
|
{
|
|
if (isReplaced()) {
|
|
computePositionedLogicalHeightReplaced(computedValues);
|
|
return;
|
|
}
|
|
|
|
// The following is based off of the W3C Working Draft from April 11, 2006 of
|
|
// CSS 2.1: Section 10.6.4 "Absolutely positioned, non-replaced elements"
|
|
// <http://www.w3.org/TR/2005/WD-CSS21-20050613/visudet.html#abs-non-replaced-height>
|
|
// (block-style-comments in this function and in computePositionedLogicalHeightUsing()
|
|
// correspond to text from the spec)
|
|
|
|
|
|
// We don't use containingBlock(), since we may be positioned by an enclosing relpositioned inline.
|
|
const RenderBoxModelObject& containerBlock = downcast<RenderBoxModelObject>(*container());
|
|
|
|
const LayoutUnit containerLogicalHeight = containingBlockLogicalHeightForPositioned(containerBlock);
|
|
|
|
const RenderStyle& styleToUse = style();
|
|
const LayoutUnit bordersPlusPadding = borderAndPaddingLogicalHeight();
|
|
const Length marginBefore = styleToUse.marginBefore();
|
|
const Length marginAfter = styleToUse.marginAfter();
|
|
Length logicalTopLength = styleToUse.logicalTop();
|
|
Length logicalBottomLength = styleToUse.logicalBottom();
|
|
|
|
/*---------------------------------------------------------------------------*\
|
|
* For the purposes of this section and the next, the term "static position"
|
|
* (of an element) refers, roughly, to the position an element would have had
|
|
* in the normal flow. More precisely, the static position for 'top' is the
|
|
* distance from the top edge of the containing block to the top margin edge
|
|
* of a hypothetical box that would have been the first box of the element if
|
|
* its 'position' property had been 'static' and 'float' had been 'none'. The
|
|
* value is negative if the hypothetical box is above the containing block.
|
|
*
|
|
* But rather than actually calculating the dimensions of that hypothetical
|
|
* box, user agents are free to make a guess at its probable position.
|
|
*
|
|
* For the purposes of calculating the static position, the containing block
|
|
* of fixed positioned elements is the initial containing block instead of
|
|
* the viewport.
|
|
\*---------------------------------------------------------------------------*/
|
|
|
|
// see FIXME 1
|
|
// Calculate the static distance if needed.
|
|
computeBlockStaticDistance(logicalTopLength, logicalBottomLength, this, containerBlock);
|
|
|
|
// Calculate constraint equation values for 'height' case.
|
|
LayoutUnit logicalHeight = computedValues.m_extent;
|
|
computePositionedLogicalHeightUsing(MainOrPreferredSize, styleToUse.logicalHeight(), containerBlock, containerLogicalHeight, bordersPlusPadding, logicalHeight,
|
|
logicalTopLength, logicalBottomLength, marginBefore, marginAfter,
|
|
computedValues);
|
|
|
|
// Avoid doing any work in the common case (where the values of min-height and max-height are their defaults).
|
|
// see FIXME 2
|
|
|
|
// Calculate constraint equation values for 'max-height' case.
|
|
if (!styleToUse.logicalMaxHeight().isUndefined()) {
|
|
LogicalExtentComputedValues maxValues;
|
|
|
|
computePositionedLogicalHeightUsing(MaxSize, styleToUse.logicalMaxHeight(), containerBlock, containerLogicalHeight, bordersPlusPadding, logicalHeight,
|
|
logicalTopLength, logicalBottomLength, marginBefore, marginAfter,
|
|
maxValues);
|
|
|
|
if (computedValues.m_extent > maxValues.m_extent) {
|
|
computedValues.m_extent = maxValues.m_extent;
|
|
computedValues.m_position = maxValues.m_position;
|
|
computedValues.m_margins.m_before = maxValues.m_margins.m_before;
|
|
computedValues.m_margins.m_after = maxValues.m_margins.m_after;
|
|
}
|
|
}
|
|
|
|
// Calculate constraint equation values for 'min-height' case.
|
|
Length logicalMinHeight = styleToUse.logicalMinHeight();
|
|
if (logicalMinHeight.isAuto() || !logicalMinHeight.isZero() || logicalMinHeight.isIntrinsic()) {
|
|
LogicalExtentComputedValues minValues;
|
|
|
|
computePositionedLogicalHeightUsing(MinSize, styleToUse.logicalMinHeight(), containerBlock, containerLogicalHeight, bordersPlusPadding, logicalHeight,
|
|
logicalTopLength, logicalBottomLength, marginBefore, marginAfter,
|
|
minValues);
|
|
|
|
if (computedValues.m_extent < minValues.m_extent) {
|
|
computedValues.m_extent = minValues.m_extent;
|
|
computedValues.m_position = minValues.m_position;
|
|
computedValues.m_margins.m_before = minValues.m_margins.m_before;
|
|
computedValues.m_margins.m_after = minValues.m_margins.m_after;
|
|
}
|
|
}
|
|
|
|
// Set final height value.
|
|
computedValues.m_extent += bordersPlusPadding;
|
|
|
|
// Adjust logicalTop if we need to for perpendicular writing modes in fragments.
|
|
// FIXME: Add support for other types of objects as containerBlock, not only RenderBlock.
|
|
RenderFragmentedFlow* fragmentedFlow = enclosingFragmentedFlow();
|
|
if (fragmentedFlow && isHorizontalWritingMode() != containerBlock.isHorizontalWritingMode() && is<RenderBlock>(containerBlock)) {
|
|
ASSERT(containerBlock.canHaveBoxInfoInFragment());
|
|
LayoutUnit logicalTopPos = computedValues.m_position;
|
|
const RenderBlock& renderBox = downcast<RenderBlock>(containerBlock);
|
|
LayoutUnit cbPageOffset = renderBox.offsetFromLogicalTopOfFirstPage() - logicalLeft();
|
|
RenderFragmentContainer* cbFragment = renderBox.fragmentAtBlockOffset(cbPageOffset);
|
|
if (cbFragment) {
|
|
RenderBoxFragmentInfo* boxInfo = renderBox.renderBoxFragmentInfo(cbFragment);
|
|
if (boxInfo) {
|
|
logicalTopPos += boxInfo->logicalLeft();
|
|
computedValues.m_position = logicalTopPos;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void computeLogicalTopPositionedOffset(LayoutUnit& logicalTopPos, const RenderBox* child, LayoutUnit logicalHeightValue, const RenderBoxModelObject& containerBlock, LayoutUnit containerLogicalHeight)
|
|
{
|
|
// Deal with differing writing modes here. Our offset needs to be in the containing block's coordinate space. If the containing block is flipped
|
|
// along this axis, then we need to flip the coordinate. This can only happen if the containing block is both a flipped mode and perpendicular to us.
|
|
if ((child->style().isFlippedBlocksWritingMode() && child->isHorizontalWritingMode() != containerBlock.isHorizontalWritingMode())
|
|
|| (child->style().isFlippedBlocksWritingMode() != containerBlock.style().isFlippedBlocksWritingMode() && child->isHorizontalWritingMode() == containerBlock.isHorizontalWritingMode()))
|
|
logicalTopPos = containerLogicalHeight - logicalHeightValue - logicalTopPos;
|
|
|
|
// Our offset is from the logical bottom edge in a flipped environment, e.g., right for vertical-rl and bottom for horizontal-bt.
|
|
if (containerBlock.style().isFlippedBlocksWritingMode() && child->isHorizontalWritingMode() == containerBlock.isHorizontalWritingMode()) {
|
|
if (child->isHorizontalWritingMode())
|
|
logicalTopPos += containerBlock.borderBottom();
|
|
else
|
|
logicalTopPos += containerBlock.borderRight();
|
|
} else {
|
|
if (child->isHorizontalWritingMode())
|
|
logicalTopPos += containerBlock.borderTop();
|
|
else
|
|
logicalTopPos += containerBlock.borderLeft();
|
|
}
|
|
}
|
|
|
|
void RenderBox::computePositionedLogicalHeightUsing(SizeType heightType, Length logicalHeightLength, const RenderBoxModelObject& containerBlock,
|
|
LayoutUnit containerLogicalHeight, LayoutUnit bordersPlusPadding, LayoutUnit logicalHeight,
|
|
Length logicalTop, Length logicalBottom, Length marginBefore, Length marginAfter,
|
|
LogicalExtentComputedValues& computedValues) const
|
|
{
|
|
ASSERT(heightType == MinSize || heightType == MainOrPreferredSize || !logicalHeightLength.isAuto());
|
|
if (heightType == MinSize && logicalHeightLength.isAuto()) {
|
|
if (shouldComputeLogicalHeightFromAspectRatio())
|
|
logicalHeightLength = Length(logicalHeight, LengthType::Fixed);
|
|
else
|
|
logicalHeightLength = Length(0, LengthType::Fixed);
|
|
}
|
|
|
|
// 'top' and 'bottom' cannot both be 'auto' because 'top would of been
|
|
// converted to the static position in computePositionedLogicalHeight()
|
|
ASSERT(!(logicalTop.isAuto() && logicalBottom.isAuto()));
|
|
|
|
LayoutUnit logicalHeightValue;
|
|
LayoutUnit contentLogicalHeight = logicalHeight - bordersPlusPadding;
|
|
|
|
const LayoutUnit containerRelativeLogicalWidth = containingBlockLogicalWidthForPositioned(containerBlock, nullptr, false);
|
|
|
|
LayoutUnit logicalTopValue;
|
|
|
|
bool fromAspectRatio = heightType == MainOrPreferredSize && shouldComputeLogicalHeightFromAspectRatio();
|
|
bool logicalHeightIsAuto = logicalHeightLength.isAuto() && !fromAspectRatio;
|
|
bool logicalTopIsAuto = logicalTop.isAuto();
|
|
bool logicalBottomIsAuto = logicalBottom.isAuto();
|
|
|
|
// Height is never unsolved for tables.
|
|
LayoutUnit resolvedLogicalHeight;
|
|
if (isTable()) {
|
|
resolvedLogicalHeight = contentLogicalHeight;
|
|
logicalHeightIsAuto = false;
|
|
} else {
|
|
if (logicalHeightLength.isIntrinsic())
|
|
resolvedLogicalHeight = computeIntrinsicLogicalContentHeightUsing(logicalHeightLength, contentLogicalHeight, bordersPlusPadding).value();
|
|
else if (fromAspectRatio) {
|
|
resolvedLogicalHeight = blockSizeFromAspectRatio(horizontalBorderAndPaddingExtent(), verticalBorderAndPaddingExtent(), LayoutUnit(style().logicalAspectRatio()), style().boxSizingForAspectRatio(), logicalWidth());
|
|
resolvedLogicalHeight = std::max(LayoutUnit(), resolvedLogicalHeight - bordersPlusPadding);
|
|
} else
|
|
resolvedLogicalHeight = adjustContentBoxLogicalHeightForBoxSizing(valueForLength(logicalHeightLength, containerLogicalHeight));
|
|
}
|
|
|
|
if (!logicalTopIsAuto && !logicalHeightIsAuto && !logicalBottomIsAuto) {
|
|
/*-----------------------------------------------------------------------*\
|
|
* If none of the three are 'auto': If both 'margin-top' and 'margin-
|
|
* bottom' are 'auto', solve the equation under the extra constraint that
|
|
* the two margins get equal values. If one of 'margin-top' or 'margin-
|
|
* bottom' is 'auto', solve the equation for that value. If the values
|
|
* are over-constrained, ignore the value for 'bottom' and solve for that
|
|
* value.
|
|
\*-----------------------------------------------------------------------*/
|
|
// NOTE: It is not necessary to solve for 'bottom' in the over constrained
|
|
// case because the value is not used for any further calculations.
|
|
|
|
logicalHeightValue = resolvedLogicalHeight;
|
|
logicalTopValue = valueForLength(logicalTop, containerLogicalHeight);
|
|
|
|
const LayoutUnit availableSpace = containerLogicalHeight - (logicalTopValue + logicalHeightValue + valueForLength(logicalBottom, containerLogicalHeight) + bordersPlusPadding);
|
|
|
|
// Margins are now the only unknown
|
|
if (marginBefore.isAuto() && marginAfter.isAuto()) {
|
|
// Both margins auto, solve for equality
|
|
// NOTE: This may result in negative values.
|
|
computedValues.m_margins.m_before = availableSpace / 2; // split the difference
|
|
computedValues.m_margins.m_after = availableSpace - computedValues.m_margins.m_before; // account for odd valued differences
|
|
} else if (marginBefore.isAuto()) {
|
|
// Solve for top margin
|
|
computedValues.m_margins.m_after = valueForLength(marginAfter, containerRelativeLogicalWidth);
|
|
computedValues.m_margins.m_before = availableSpace - computedValues.m_margins.m_after;
|
|
} else if (marginAfter.isAuto()) {
|
|
// Solve for bottom margin
|
|
computedValues.m_margins.m_before = valueForLength(marginBefore, containerRelativeLogicalWidth);
|
|
computedValues.m_margins.m_after = availableSpace - computedValues.m_margins.m_before;
|
|
} else {
|
|
// Over-constrained, (no need solve for bottom)
|
|
computedValues.m_margins.m_before = valueForLength(marginBefore, containerRelativeLogicalWidth);
|
|
computedValues.m_margins.m_after = valueForLength(marginAfter, containerRelativeLogicalWidth);
|
|
}
|
|
} else {
|
|
/*--------------------------------------------------------------------*\
|
|
* Otherwise, set 'auto' values for 'margin-top' and 'margin-bottom'
|
|
* to 0, and pick the one of the following six rules that applies.
|
|
*
|
|
* 1. 'top' and 'height' are 'auto' and 'bottom' is not 'auto', then
|
|
* the height is based on the content, and solve for 'top'.
|
|
*
|
|
* OMIT RULE 2 AS IT SHOULD NEVER BE HIT
|
|
* ------------------------------------------------------------------
|
|
* 2. 'top' and 'bottom' are 'auto' and 'height' is not 'auto', then
|
|
* set 'top' to the static position, and solve for 'bottom'.
|
|
* ------------------------------------------------------------------
|
|
*
|
|
* 3. 'height' and 'bottom' are 'auto' and 'top' is not 'auto', then
|
|
* the height is based on the content, and solve for 'bottom'.
|
|
* 4. 'top' is 'auto', 'height' and 'bottom' are not 'auto', and
|
|
* solve for 'top'.
|
|
* 5. 'height' is 'auto', 'top' and 'bottom' are not 'auto', and
|
|
* solve for 'height'.
|
|
* 6. 'bottom' is 'auto', 'top' and 'height' are not 'auto', and
|
|
* solve for 'bottom'.
|
|
\*--------------------------------------------------------------------*/
|
|
// NOTE: For rules 3 and 6 it is not necessary to solve for 'bottom'
|
|
// because the value is not used for any further calculations.
|
|
|
|
// Calculate margins, 'auto' margins are ignored.
|
|
computedValues.m_margins.m_before = minimumValueForLength(marginBefore, containerRelativeLogicalWidth);
|
|
computedValues.m_margins.m_after = minimumValueForLength(marginAfter, containerRelativeLogicalWidth);
|
|
|
|
const LayoutUnit availableSpace = containerLogicalHeight - (computedValues.m_margins.m_before + computedValues.m_margins.m_after + bordersPlusPadding);
|
|
|
|
// Use rule/case that applies.
|
|
if (logicalTopIsAuto && logicalHeightIsAuto && !logicalBottomIsAuto) {
|
|
// RULE 1: (height is content based, solve of top)
|
|
logicalHeightValue = contentLogicalHeight;
|
|
logicalTopValue = availableSpace - (logicalHeightValue + valueForLength(logicalBottom, containerLogicalHeight));
|
|
} else if (!logicalTopIsAuto && logicalHeightIsAuto && logicalBottomIsAuto) {
|
|
// RULE 3: (height is content based, no need solve of bottom)
|
|
logicalTopValue = valueForLength(logicalTop, containerLogicalHeight);
|
|
logicalHeightValue = contentLogicalHeight;
|
|
} else if (logicalTopIsAuto && !logicalHeightIsAuto && !logicalBottomIsAuto) {
|
|
// RULE 4: (solve of top)
|
|
logicalHeightValue = resolvedLogicalHeight;
|
|
logicalTopValue = availableSpace - (logicalHeightValue + valueForLength(logicalBottom, containerLogicalHeight));
|
|
} else if (!logicalTopIsAuto && logicalHeightIsAuto && !logicalBottomIsAuto) {
|
|
// RULE 5: (solve of height)
|
|
logicalTopValue = valueForLength(logicalTop, containerLogicalHeight);
|
|
logicalHeightValue = std::max<LayoutUnit>(0, availableSpace - (logicalTopValue + valueForLength(logicalBottom, containerLogicalHeight)));
|
|
} else if (!logicalTopIsAuto && !logicalHeightIsAuto && logicalBottomIsAuto) {
|
|
// RULE 6: (no need solve of bottom)
|
|
logicalHeightValue = resolvedLogicalHeight;
|
|
logicalTopValue = valueForLength(logicalTop, containerLogicalHeight);
|
|
}
|
|
}
|
|
computedValues.m_extent = logicalHeightValue;
|
|
|
|
// Use computed values to calculate the vertical position.
|
|
computedValues.m_position = logicalTopValue + computedValues.m_margins.m_before;
|
|
computeLogicalTopPositionedOffset(computedValues.m_position, this, logicalHeightValue + bordersPlusPadding, containerBlock, containerLogicalHeight);
|
|
}
|
|
|
|
void RenderBox::computePositionedLogicalWidthReplaced(LogicalExtentComputedValues& computedValues) const
|
|
{
|
|
// The following is based off of the W3C Working Draft from April 11, 2006 of
|
|
// CSS 2.1: Section 10.3.8 "Absolutely positioned, replaced elements"
|
|
// <http://www.w3.org/TR/2005/WD-CSS21-20050613/visudet.html#abs-replaced-width>
|
|
// (block-style-comments in this function correspond to text from the spec and
|
|
// the numbers correspond to numbers in spec)
|
|
|
|
// We don't use containingBlock(), since we may be positioned by an enclosing
|
|
// relative positioned inline.
|
|
const RenderBoxModelObject& containerBlock = downcast<RenderBoxModelObject>(*container());
|
|
|
|
const LayoutUnit containerLogicalWidth = containingBlockLogicalWidthForPositioned(containerBlock);
|
|
const LayoutUnit containerRelativeLogicalWidth = containingBlockLogicalWidthForPositioned(containerBlock, nullptr, false);
|
|
|
|
// To match WinIE, in quirks mode use the parent's 'direction' property
|
|
// instead of the container block's.
|
|
TextDirection containerDirection = containerBlock.style().direction();
|
|
|
|
// Variables to solve.
|
|
bool isHorizontal = isHorizontalWritingMode();
|
|
Length logicalLeft = style().logicalLeft();
|
|
Length logicalRight = style().logicalRight();
|
|
Length marginLogicalLeft = isHorizontal ? style().marginLeft() : style().marginTop();
|
|
Length marginLogicalRight = isHorizontal ? style().marginRight() : style().marginBottom();
|
|
LayoutUnit& marginLogicalLeftAlias = style().isLeftToRightDirection() ? computedValues.m_margins.m_start : computedValues.m_margins.m_end;
|
|
LayoutUnit& marginLogicalRightAlias = style().isLeftToRightDirection() ? computedValues.m_margins.m_end : computedValues.m_margins.m_start;
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 1. The used value of 'width' is determined as for inline replaced
|
|
* elements.
|
|
\*-----------------------------------------------------------------------*/
|
|
// NOTE: This value of width is final in that the min/max width calculations
|
|
// are dealt with in computeReplacedWidth(). This means that the steps to produce
|
|
// correct max/min in the non-replaced version, are not necessary.
|
|
computedValues.m_extent = computeReplacedLogicalWidth() + borderAndPaddingLogicalWidth();
|
|
|
|
const LayoutUnit availableSpace = containerLogicalWidth - computedValues.m_extent;
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 2. If both 'left' and 'right' have the value 'auto', then if 'direction'
|
|
* of the containing block is 'ltr', set 'left' to the static position;
|
|
* else if 'direction' is 'rtl', set 'right' to the static position.
|
|
\*-----------------------------------------------------------------------*/
|
|
// see FIXME 1
|
|
computeInlineStaticDistance(logicalLeft, logicalRight, this, containerBlock, containerLogicalWidth, nullptr); // FIXME: Pass the fragment.
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 3. If 'left' or 'right' are 'auto', replace any 'auto' on 'margin-left'
|
|
* or 'margin-right' with '0'.
|
|
\*-----------------------------------------------------------------------*/
|
|
if (logicalLeft.isAuto() || logicalRight.isAuto()) {
|
|
if (marginLogicalLeft.isAuto())
|
|
marginLogicalLeft.setValue(LengthType::Fixed, 0);
|
|
if (marginLogicalRight.isAuto())
|
|
marginLogicalRight.setValue(LengthType::Fixed, 0);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 4. If at this point both 'margin-left' and 'margin-right' are still
|
|
* 'auto', solve the equation under the extra constraint that the two
|
|
* margins must get equal values, unless this would make them negative,
|
|
* in which case when the direction of the containing block is 'ltr'
|
|
* ('rtl'), set 'margin-left' ('margin-right') to zero and solve for
|
|
* 'margin-right' ('margin-left').
|
|
\*-----------------------------------------------------------------------*/
|
|
LayoutUnit logicalLeftValue;
|
|
LayoutUnit logicalRightValue;
|
|
|
|
if (marginLogicalLeft.isAuto() && marginLogicalRight.isAuto()) {
|
|
// 'left' and 'right' cannot be 'auto' due to step 3
|
|
ASSERT(!(logicalLeft.isAuto() && logicalRight.isAuto()));
|
|
|
|
logicalLeftValue = valueForLength(logicalLeft, containerLogicalWidth);
|
|
logicalRightValue = valueForLength(logicalRight, containerLogicalWidth);
|
|
|
|
LayoutUnit difference = availableSpace - (logicalLeftValue + logicalRightValue);
|
|
if (difference > 0) {
|
|
marginLogicalLeftAlias = difference / 2; // split the difference
|
|
marginLogicalRightAlias = difference - marginLogicalLeftAlias; // account for odd valued differences
|
|
} else {
|
|
// Use the containing block's direction rather than the parent block's
|
|
// per CSS 2.1 reference test abspos-replaced-width-margin-000.
|
|
if (containerDirection == TextDirection::LTR) {
|
|
marginLogicalLeftAlias = 0;
|
|
marginLogicalRightAlias = difference; // will be negative
|
|
} else {
|
|
marginLogicalLeftAlias = difference; // will be negative
|
|
marginLogicalRightAlias = 0;
|
|
}
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 5. If at this point there is an 'auto' left, solve the equation for
|
|
* that value.
|
|
\*-----------------------------------------------------------------------*/
|
|
} else if (logicalLeft.isAuto()) {
|
|
marginLogicalLeftAlias = valueForLength(marginLogicalLeft, containerRelativeLogicalWidth);
|
|
marginLogicalRightAlias = valueForLength(marginLogicalRight, containerRelativeLogicalWidth);
|
|
logicalRightValue = valueForLength(logicalRight, containerLogicalWidth);
|
|
|
|
// Solve for 'left'
|
|
logicalLeftValue = availableSpace - (logicalRightValue + marginLogicalLeftAlias + marginLogicalRightAlias);
|
|
} else if (logicalRight.isAuto()) {
|
|
marginLogicalLeftAlias = valueForLength(marginLogicalLeft, containerRelativeLogicalWidth);
|
|
marginLogicalRightAlias = valueForLength(marginLogicalRight, containerRelativeLogicalWidth);
|
|
logicalLeftValue = valueForLength(logicalLeft, containerLogicalWidth);
|
|
|
|
// Solve for 'right'
|
|
logicalRightValue = availableSpace - (logicalLeftValue + marginLogicalLeftAlias + marginLogicalRightAlias);
|
|
} else if (marginLogicalLeft.isAuto()) {
|
|
marginLogicalRightAlias = valueForLength(marginLogicalRight, containerRelativeLogicalWidth);
|
|
logicalLeftValue = valueForLength(logicalLeft, containerLogicalWidth);
|
|
logicalRightValue = valueForLength(logicalRight, containerLogicalWidth);
|
|
|
|
// Solve for 'margin-left'
|
|
marginLogicalLeftAlias = availableSpace - (logicalLeftValue + logicalRightValue + marginLogicalRightAlias);
|
|
} else if (marginLogicalRight.isAuto()) {
|
|
marginLogicalLeftAlias = valueForLength(marginLogicalLeft, containerRelativeLogicalWidth);
|
|
logicalLeftValue = valueForLength(logicalLeft, containerLogicalWidth);
|
|
logicalRightValue = valueForLength(logicalRight, containerLogicalWidth);
|
|
|
|
// Solve for 'margin-right'
|
|
marginLogicalRightAlias = availableSpace - (logicalLeftValue + logicalRightValue + marginLogicalLeftAlias);
|
|
} else {
|
|
// Nothing is 'auto', just calculate the values.
|
|
marginLogicalLeftAlias = valueForLength(marginLogicalLeft, containerRelativeLogicalWidth);
|
|
marginLogicalRightAlias = valueForLength(marginLogicalRight, containerRelativeLogicalWidth);
|
|
logicalRightValue = valueForLength(logicalRight, containerLogicalWidth);
|
|
logicalLeftValue = valueForLength(logicalLeft, containerLogicalWidth);
|
|
// If the containing block is right-to-left, then push the left position as far to the right as possible
|
|
if (containerDirection == TextDirection::RTL) {
|
|
int totalLogicalWidth = computedValues.m_extent + logicalLeftValue + logicalRightValue + marginLogicalLeftAlias + marginLogicalRightAlias;
|
|
logicalLeftValue = containerLogicalWidth - (totalLogicalWidth - logicalLeftValue);
|
|
}
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 6. If at this point the values are over-constrained, ignore the value
|
|
* for either 'left' (in case the 'direction' property of the
|
|
* containing block is 'rtl') or 'right' (in case 'direction' is
|
|
* 'ltr') and solve for that value.
|
|
\*-----------------------------------------------------------------------*/
|
|
// NOTE: Constraints imposed by the width of the containing block and its content have already been accounted for above.
|
|
|
|
// FIXME: Deal with differing writing modes here. Our offset needs to be in the containing block's coordinate space, so that
|
|
// can make the result here rather complicated to compute.
|
|
|
|
// Use computed values to calculate the horizontal position.
|
|
|
|
// FIXME: This hack is needed to calculate the logical left position for a 'rtl' relatively
|
|
// positioned, inline containing block because right now, it is using the logical left position
|
|
// of the first line box when really it should use the last line box. When
|
|
// this is fixed elsewhere, this block should be removed.
|
|
if (is<RenderInline>(containerBlock) && !containerBlock.style().isLeftToRightDirection()) {
|
|
const auto& flow = downcast<RenderInline>(containerBlock);
|
|
LegacyInlineFlowBox* firstLine = flow.firstLineBox();
|
|
LegacyInlineFlowBox* lastLine = flow.lastLineBox();
|
|
if (firstLine && lastLine && firstLine != lastLine) {
|
|
computedValues.m_position = logicalLeftValue + marginLogicalLeftAlias + lastLine->borderLogicalLeft() + (lastLine->logicalLeft() - firstLine->logicalLeft());
|
|
return;
|
|
}
|
|
}
|
|
|
|
LayoutUnit logicalLeftPos = logicalLeftValue + marginLogicalLeftAlias;
|
|
// Border and padding have already been included in computedValues.m_extent.
|
|
computeLogicalLeftPositionedOffset(logicalLeftPos, this, computedValues.m_extent, containerBlock, containerLogicalWidth);
|
|
computedValues.m_position = logicalLeftPos;
|
|
}
|
|
|
|
void RenderBox::computePositionedLogicalHeightReplaced(LogicalExtentComputedValues& computedValues) const
|
|
{
|
|
// The following is based off of the W3C Working Draft from April 11, 2006 of
|
|
// CSS 2.1: Section 10.6.5 "Absolutely positioned, replaced elements"
|
|
// <http://www.w3.org/TR/2005/WD-CSS21-20050613/visudet.html#abs-replaced-height>
|
|
// (block-style-comments in this function correspond to text from the spec and
|
|
// the numbers correspond to numbers in spec)
|
|
|
|
// We don't use containingBlock(), since we may be positioned by an enclosing relpositioned inline.
|
|
const RenderBoxModelObject& containerBlock = downcast<RenderBoxModelObject>(*container());
|
|
|
|
const LayoutUnit containerLogicalHeight = containingBlockLogicalHeightForPositioned(containerBlock);
|
|
const LayoutUnit containerRelativeLogicalWidth = containingBlockLogicalWidthForPositioned(containerBlock, nullptr, false);
|
|
|
|
// Variables to solve.
|
|
Length marginBefore = style().marginBefore();
|
|
Length marginAfter = style().marginAfter();
|
|
LayoutUnit& marginBeforeAlias = computedValues.m_margins.m_before;
|
|
LayoutUnit& marginAfterAlias = computedValues.m_margins.m_after;
|
|
|
|
Length logicalTop = style().logicalTop();
|
|
Length logicalBottom = style().logicalBottom();
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 1. The used value of 'height' is determined as for inline replaced
|
|
* elements.
|
|
\*-----------------------------------------------------------------------*/
|
|
// NOTE: This value of height is final in that the min/max height calculations
|
|
// are dealt with in computeReplacedHeight(). This means that the steps to produce
|
|
// correct max/min in the non-replaced version, are not necessary.
|
|
computedValues.m_extent = computeReplacedLogicalHeight() + borderAndPaddingLogicalHeight();
|
|
const LayoutUnit availableSpace = containerLogicalHeight - computedValues.m_extent;
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 2. If both 'top' and 'bottom' have the value 'auto', replace 'top'
|
|
* with the element's static position.
|
|
\*-----------------------------------------------------------------------*/
|
|
// see FIXME 1
|
|
computeBlockStaticDistance(logicalTop, logicalBottom, this, containerBlock);
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 3. If 'bottom' is 'auto', replace any 'auto' on 'margin-top' or
|
|
* 'margin-bottom' with '0'.
|
|
\*-----------------------------------------------------------------------*/
|
|
// FIXME: The spec. says that this step should only be taken when bottom is
|
|
// auto, but if only top is auto, this makes step 4 impossible.
|
|
if (logicalTop.isAuto() || logicalBottom.isAuto()) {
|
|
if (marginBefore.isAuto())
|
|
marginBefore.setValue(LengthType::Fixed, 0);
|
|
if (marginAfter.isAuto())
|
|
marginAfter.setValue(LengthType::Fixed, 0);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 4. If at this point both 'margin-top' and 'margin-bottom' are still
|
|
* 'auto', solve the equation under the extra constraint that the two
|
|
* margins must get equal values.
|
|
\*-----------------------------------------------------------------------*/
|
|
LayoutUnit logicalTopValue;
|
|
LayoutUnit logicalBottomValue;
|
|
|
|
if (marginBefore.isAuto() && marginAfter.isAuto()) {
|
|
// 'top' and 'bottom' cannot be 'auto' due to step 2 and 3 combined.
|
|
ASSERT(!(logicalTop.isAuto() || logicalBottom.isAuto()));
|
|
|
|
logicalTopValue = valueForLength(logicalTop, containerLogicalHeight);
|
|
logicalBottomValue = valueForLength(logicalBottom, containerLogicalHeight);
|
|
|
|
LayoutUnit difference = availableSpace - (logicalTopValue + logicalBottomValue);
|
|
// NOTE: This may result in negative values.
|
|
marginBeforeAlias = difference / 2; // split the difference
|
|
marginAfterAlias = difference - marginBeforeAlias; // account for odd valued differences
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 5. If at this point there is only one 'auto' left, solve the equation
|
|
* for that value.
|
|
\*-----------------------------------------------------------------------*/
|
|
} else if (logicalTop.isAuto()) {
|
|
marginBeforeAlias = valueForLength(marginBefore, containerRelativeLogicalWidth);
|
|
marginAfterAlias = valueForLength(marginAfter, containerRelativeLogicalWidth);
|
|
logicalBottomValue = valueForLength(logicalBottom, containerLogicalHeight);
|
|
|
|
// Solve for 'top'
|
|
logicalTopValue = availableSpace - (logicalBottomValue + marginBeforeAlias + marginAfterAlias);
|
|
} else if (logicalBottom.isAuto()) {
|
|
marginBeforeAlias = valueForLength(marginBefore, containerRelativeLogicalWidth);
|
|
marginAfterAlias = valueForLength(marginAfter, containerRelativeLogicalWidth);
|
|
logicalTopValue = valueForLength(logicalTop, containerLogicalHeight);
|
|
|
|
// Solve for 'bottom'
|
|
// NOTE: It is not necessary to solve for 'bottom' because we don't ever
|
|
// use the value.
|
|
} else if (marginBefore.isAuto()) {
|
|
marginAfterAlias = valueForLength(marginAfter, containerRelativeLogicalWidth);
|
|
logicalTopValue = valueForLength(logicalTop, containerLogicalHeight);
|
|
logicalBottomValue = valueForLength(logicalBottom, containerLogicalHeight);
|
|
|
|
// Solve for 'margin-top'
|
|
marginBeforeAlias = availableSpace - (logicalTopValue + logicalBottomValue + marginAfterAlias);
|
|
} else if (marginAfter.isAuto()) {
|
|
marginBeforeAlias = valueForLength(marginBefore, containerRelativeLogicalWidth);
|
|
logicalTopValue = valueForLength(logicalTop, containerLogicalHeight);
|
|
logicalBottomValue = valueForLength(logicalBottom, containerLogicalHeight);
|
|
|
|
// Solve for 'margin-bottom'
|
|
marginAfterAlias = availableSpace - (logicalTopValue + logicalBottomValue + marginBeforeAlias);
|
|
} else {
|
|
// Nothing is 'auto', just calculate the values.
|
|
marginBeforeAlias = valueForLength(marginBefore, containerRelativeLogicalWidth);
|
|
marginAfterAlias = valueForLength(marginAfter, containerRelativeLogicalWidth);
|
|
logicalTopValue = valueForLength(logicalTop, containerLogicalHeight);
|
|
// NOTE: It is not necessary to solve for 'bottom' because we don't ever
|
|
// use the value.
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------*\
|
|
* 6. If at this point the values are over-constrained, ignore the value
|
|
* for 'bottom' and solve for that value.
|
|
\*-----------------------------------------------------------------------*/
|
|
// NOTE: It is not necessary to do this step because we don't end up using
|
|
// the value of 'bottom' regardless of whether the values are over-constrained
|
|
// or not.
|
|
|
|
// Use computed values to calculate the vertical position.
|
|
LayoutUnit logicalTopPos = logicalTopValue + marginBeforeAlias;
|
|
// Border and padding have already been included in computedValues.m_extent.
|
|
computeLogicalTopPositionedOffset(logicalTopPos, this, computedValues.m_extent, containerBlock, containerLogicalHeight);
|
|
computedValues.m_position = logicalTopPos;
|
|
}
|
|
|
|
VisiblePosition RenderBox::positionForPoint(const LayoutPoint& point, const RenderFragmentContainer* fragment)
|
|
{
|
|
// no children...return this render object's element, if there is one, and offset 0
|
|
if (!firstChild())
|
|
return createVisiblePosition(nonPseudoElement() ? firstPositionInOrBeforeNode(nonPseudoElement()) : Position());
|
|
|
|
if (isTable() && nonPseudoElement()) {
|
|
LayoutUnit right = contentWidth() + horizontalBorderAndPaddingExtent();
|
|
LayoutUnit bottom = contentHeight() + verticalBorderAndPaddingExtent();
|
|
|
|
if (point.x() < 0 || point.x() > right || point.y() < 0 || point.y() > bottom) {
|
|
if (point.x() <= right / 2)
|
|
return createVisiblePosition(firstPositionInOrBeforeNode(nonPseudoElement()));
|
|
return createVisiblePosition(lastPositionInOrAfterNode(nonPseudoElement()));
|
|
}
|
|
}
|
|
|
|
// Pass off to the closest child.
|
|
LayoutUnit minDist = LayoutUnit::max();
|
|
RenderBox* closestRenderer = nullptr;
|
|
LayoutPoint adjustedPoint = point;
|
|
if (isTableRow())
|
|
adjustedPoint.moveBy(location());
|
|
|
|
for (auto& renderer : childrenOfType<RenderBox>(*this)) {
|
|
if (is<RenderFragmentedFlow>(*this)) {
|
|
ASSERT(fragment);
|
|
if (!downcast<RenderFragmentedFlow>(*this).objectShouldFragmentInFlowFragment(&renderer, fragment))
|
|
continue;
|
|
}
|
|
|
|
if ((!renderer.firstChild() && !renderer.isInline() && !is<RenderBlockFlow>(renderer))
|
|
|| renderer.style().visibility() != Visibility::Visible)
|
|
continue;
|
|
|
|
LayoutUnit top = renderer.borderTop() + renderer.paddingTop() + (is<RenderTableRow>(*this) ? 0_lu : renderer.y());
|
|
LayoutUnit bottom = top + renderer.contentHeight();
|
|
LayoutUnit left = renderer.borderLeft() + renderer.paddingLeft() + (is<RenderTableRow>(*this) ? 0_lu : renderer.x());
|
|
LayoutUnit right = left + renderer.contentWidth();
|
|
|
|
if (point.x() <= right && point.x() >= left && point.y() <= top && point.y() >= bottom) {
|
|
if (is<RenderTableRow>(renderer))
|
|
return renderer.positionForPoint(point + adjustedPoint - renderer.locationOffset(), fragment);
|
|
return renderer.positionForPoint(point - renderer.locationOffset(), fragment);
|
|
}
|
|
|
|
// Find the distance from (x, y) to the box. Split the space around the box into 8 pieces
|
|
// and use a different compare depending on which piece (x, y) is in.
|
|
LayoutPoint cmp;
|
|
if (point.x() > right) {
|
|
if (point.y() < top)
|
|
cmp = LayoutPoint(right, top);
|
|
else if (point.y() > bottom)
|
|
cmp = LayoutPoint(right, bottom);
|
|
else
|
|
cmp = LayoutPoint(right, point.y());
|
|
} else if (point.x() < left) {
|
|
if (point.y() < top)
|
|
cmp = LayoutPoint(left, top);
|
|
else if (point.y() > bottom)
|
|
cmp = LayoutPoint(left, bottom);
|
|
else
|
|
cmp = LayoutPoint(left, point.y());
|
|
} else {
|
|
if (point.y() < top)
|
|
cmp = LayoutPoint(point.x(), top);
|
|
else
|
|
cmp = LayoutPoint(point.x(), bottom);
|
|
}
|
|
|
|
LayoutSize difference = cmp - point;
|
|
|
|
LayoutUnit dist = difference.width() * difference.width() + difference.height() * difference.height();
|
|
if (dist < minDist) {
|
|
closestRenderer = &renderer;
|
|
minDist = dist;
|
|
}
|
|
}
|
|
|
|
if (closestRenderer)
|
|
return closestRenderer->positionForPoint(adjustedPoint - closestRenderer->locationOffset(), fragment);
|
|
|
|
return createVisiblePosition(firstPositionInOrBeforeNode(nonPseudoElement()));
|
|
}
|
|
|
|
bool RenderBox::shrinkToAvoidFloats() const
|
|
{
|
|
// Floating objects don't shrink. Objects that don't avoid floats don't shrink. Marquees don't shrink.
|
|
if ((isInline() && !isHTMLMarquee()) || !avoidsFloats() || isFloating())
|
|
return false;
|
|
|
|
// Only auto width objects can possibly shrink to avoid floats.
|
|
return style().width().isAuto();
|
|
}
|
|
|
|
bool RenderBox::createsNewFormattingContext() const
|
|
{
|
|
return isInlineBlockOrInlineTable() || isFloatingOrOutOfFlowPositioned() || hasPotentiallyScrollableOverflow() || isFlexItemIncludingDeprecated()
|
|
|| isTableCell() || isTableCaption() || isFieldset() || isWritingModeRoot() || isDocumentElementRenderer() || isRenderFragmentedFlow() || isRenderFragmentContainer()
|
|
|| style().containsLayout() || isGridItem() || style().specifiesColumns() || style().columnSpan() == ColumnSpan::All || style().display() == DisplayType::FlowRoot;
|
|
}
|
|
|
|
bool RenderBox::avoidsFloats() const
|
|
{
|
|
return isReplaced() || isHR() || isLegend() || isFieldset() || createsNewFormattingContext();
|
|
}
|
|
|
|
void RenderBox::addVisualEffectOverflow()
|
|
{
|
|
bool hasBoxShadow = style().boxShadow();
|
|
bool hasBorderImageOutsets = style().hasBorderImageOutsets();
|
|
bool hasOutline = outlineStyleForRepaint().hasOutlineInVisualOverflow();
|
|
if (!hasBoxShadow && !hasBorderImageOutsets && !hasOutline)
|
|
return;
|
|
|
|
addVisualOverflow(applyVisualEffectOverflow(borderBoxRect()));
|
|
|
|
if (auto* fragmentedFlow = enclosingFragmentedFlow())
|
|
fragmentedFlow->addFragmentsVisualEffectOverflow(this);
|
|
}
|
|
|
|
LayoutRect RenderBox::applyVisualEffectOverflow(const LayoutRect& borderBox) const
|
|
{
|
|
bool isFlipped = style().isFlippedBlocksWritingMode();
|
|
bool isHorizontal = isHorizontalWritingMode();
|
|
|
|
LayoutUnit overflowMinX = borderBox.x();
|
|
LayoutUnit overflowMaxX = borderBox.maxX();
|
|
LayoutUnit overflowMinY = borderBox.y();
|
|
LayoutUnit overflowMaxY = borderBox.maxY();
|
|
|
|
// Compute box-shadow overflow first.
|
|
if (style().boxShadow()) {
|
|
auto shadowExtent = style().boxShadowExtent();
|
|
|
|
// In flipped blocks writing modes such as vertical-rl, the physical right shadow value is actually at the lower x-coordinate.
|
|
overflowMinX = borderBox.x() + ((!isFlipped || isHorizontal) ? shadowExtent.left() : -shadowExtent.right());
|
|
overflowMaxX = borderBox.maxX() + ((!isFlipped || isHorizontal) ? shadowExtent.right() : -shadowExtent.left());
|
|
overflowMinY = borderBox.y() + ((!isFlipped || !isHorizontal) ? shadowExtent.top() : -shadowExtent.bottom());
|
|
overflowMaxY = borderBox.maxY() + ((!isFlipped || !isHorizontal) ? shadowExtent.bottom() : -shadowExtent.top());
|
|
}
|
|
|
|
// Now compute border-image-outset overflow.
|
|
if (style().hasBorderImageOutsets()) {
|
|
auto borderOutsets = style().borderImageOutsets();
|
|
|
|
// In flipped blocks writing modes, the physical sides are inverted. For example in vertical-rl, the right
|
|
// border is at the lower x coordinate value.
|
|
overflowMinX = std::min(overflowMinX, borderBox.x() - ((!isFlipped || isHorizontal) ? borderOutsets.left() : borderOutsets.right()));
|
|
overflowMaxX = std::max(overflowMaxX, borderBox.maxX() + ((!isFlipped || isHorizontal) ? borderOutsets.right() : borderOutsets.left()));
|
|
overflowMinY = std::min(overflowMinY, borderBox.y() - ((!isFlipped || !isHorizontal) ? borderOutsets.top() : borderOutsets.bottom()));
|
|
overflowMaxY = std::max(overflowMaxY, borderBox.maxY() + ((!isFlipped || !isHorizontal) ? borderOutsets.bottom() : borderOutsets.top()));
|
|
}
|
|
|
|
if (outlineStyleForRepaint().hasOutlineInVisualOverflow()) {
|
|
LayoutUnit outlineSize { outlineStyleForRepaint().outlineSize() };
|
|
overflowMinX = std::min(overflowMinX, borderBox.x() - outlineSize);
|
|
overflowMaxX = std::max(overflowMaxX, borderBox.maxX() + outlineSize);
|
|
overflowMinY = std::min(overflowMinY, borderBox.y() - outlineSize);
|
|
overflowMaxY = std::max(overflowMaxY, borderBox.maxY() + outlineSize);
|
|
}
|
|
// Add in the final overflow with shadows and outsets combined.
|
|
return LayoutRect(overflowMinX, overflowMinY, overflowMaxX - overflowMinX, overflowMaxY - overflowMinY);
|
|
}
|
|
|
|
void RenderBox::addOverflowFromChild(const RenderBox* child, const LayoutSize& delta)
|
|
{
|
|
// Never allow flow threads to propagate overflow up to a parent.
|
|
if (child->isRenderFragmentedFlow())
|
|
return;
|
|
|
|
RenderFragmentedFlow* fragmentedFlow = enclosingFragmentedFlow();
|
|
if (fragmentedFlow)
|
|
fragmentedFlow->addFragmentsOverflowFromChild(this, child, delta);
|
|
|
|
// Only propagate layout overflow from the child if the child isn't clipping its overflow. If it is, then
|
|
// its overflow is internal to it, and we don't care about it. layoutOverflowRectForPropagation takes care of this
|
|
// and just propagates the border box rect instead.
|
|
LayoutRect childLayoutOverflowRect = child->layoutOverflowRectForPropagation(&style());
|
|
childLayoutOverflowRect.move(delta);
|
|
addLayoutOverflow(childLayoutOverflowRect);
|
|
|
|
// Add in visual overflow from the child. Even if the child clips its overflow, it may still
|
|
// have visual overflow of its own set from box shadows or reflections. It is unnecessary to propagate this
|
|
// overflow if we are clipping our own overflow.
|
|
if (child->hasSelfPaintingLayer() || hasPotentiallyScrollableOverflow())
|
|
return;
|
|
LayoutRect childVisualOverflowRect = child->visualOverflowRectForPropagation(&style());
|
|
childVisualOverflowRect.move(delta);
|
|
addVisualOverflow(childVisualOverflowRect);
|
|
}
|
|
|
|
void RenderBox::addLayoutOverflow(const LayoutRect& rect)
|
|
{
|
|
LayoutRect clientBox = flippedClientBoxRect();
|
|
if (clientBox.contains(rect) || rect.isEmpty())
|
|
return;
|
|
|
|
// For overflow clip objects, we don't want to propagate overflow into unreachable areas.
|
|
LayoutRect overflowRect(rect);
|
|
if (hasPotentiallyScrollableOverflow() || isRenderView()) {
|
|
// Overflow is in the block's coordinate space and thus is flipped for horizontal-bt and vertical-rl
|
|
// writing modes. At this stage that is actually a simplification, since we can treat horizontal-tb/bt as the same
|
|
// and vertical-lr/rl as the same.
|
|
bool hasTopOverflow = isTopLayoutOverflowAllowed();
|
|
bool hasLeftOverflow = isLeftLayoutOverflowAllowed();
|
|
|
|
if (!hasTopOverflow)
|
|
overflowRect.shiftYEdgeTo(std::max(overflowRect.y(), clientBox.y()));
|
|
else
|
|
overflowRect.shiftMaxYEdgeTo(std::min(overflowRect.maxY(), clientBox.maxY()));
|
|
if (!hasLeftOverflow)
|
|
overflowRect.shiftXEdgeTo(std::max(overflowRect.x(), clientBox.x()));
|
|
else
|
|
overflowRect.shiftMaxXEdgeTo(std::min(overflowRect.maxX(), clientBox.maxX()));
|
|
|
|
// Now re-test with the adjusted rectangle and see if it has become unreachable or fully
|
|
// contained.
|
|
if (clientBox.contains(overflowRect) || overflowRect.isEmpty())
|
|
return;
|
|
}
|
|
|
|
if (!m_overflow)
|
|
m_overflow = adoptRef(new RenderOverflow(clientBox, borderBoxRect()));
|
|
|
|
m_overflow->addLayoutOverflow(overflowRect);
|
|
}
|
|
|
|
void RenderBox::addVisualOverflow(const LayoutRect& rect)
|
|
{
|
|
LayoutRect borderBox = borderBoxRect();
|
|
if (borderBox.contains(rect) || rect.isEmpty())
|
|
return;
|
|
|
|
if (!m_overflow)
|
|
m_overflow = adoptRef(new RenderOverflow(flippedClientBoxRect(), borderBox));
|
|
|
|
m_overflow->addVisualOverflow(rect);
|
|
}
|
|
|
|
void RenderBox::clearOverflow()
|
|
{
|
|
m_overflow = nullptr;
|
|
RenderFragmentedFlow* fragmentedFlow = enclosingFragmentedFlow();
|
|
if (fragmentedFlow)
|
|
fragmentedFlow->clearFragmentsOverflow(this);
|
|
}
|
|
|
|
bool RenderBox::percentageLogicalHeightIsResolvable() const
|
|
{
|
|
// Do this to avoid duplicating all the logic that already exists when computing
|
|
// an actual percentage height.
|
|
Length fakeLength(100, LengthType::Percent);
|
|
return computePercentageLogicalHeight(fakeLength) != std::nullopt;
|
|
}
|
|
|
|
bool RenderBox::hasUnsplittableScrollingOverflow() const
|
|
{
|
|
// We will paginate as long as we don't scroll overflow in the pagination direction.
|
|
bool isHorizontal = isHorizontalWritingMode();
|
|
if ((isHorizontal && !scrollsOverflowY()) || (!isHorizontal && !scrollsOverflowX()))
|
|
return false;
|
|
|
|
// We do have overflow. We'll still be willing to paginate as long as the block
|
|
// has auto logical height, auto or undefined max-logical-height and a zero or auto min-logical-height.
|
|
// Note this is just a heuristic, and it's still possible to have overflow under these
|
|
// conditions, but it should work out to be good enough for common cases. Paginating overflow
|
|
// with scrollbars present is not the end of the world and is what we used to do in the old model anyway.
|
|
return !style().logicalHeight().isIntrinsicOrAuto()
|
|
|| (!style().logicalMaxHeight().isIntrinsicOrAuto() && !style().logicalMaxHeight().isUndefined() && (!style().logicalMaxHeight().isPercentOrCalculated() || percentageLogicalHeightIsResolvable()))
|
|
|| (!style().logicalMinHeight().isIntrinsicOrAuto() && style().logicalMinHeight().isPositive() && (!style().logicalMinHeight().isPercentOrCalculated() || percentageLogicalHeightIsResolvable()));
|
|
}
|
|
|
|
bool RenderBox::isUnsplittableForPagination() const
|
|
{
|
|
return isReplaced()
|
|
|| hasUnsplittableScrollingOverflow()
|
|
|| (parent() && isWritingModeRoot())
|
|
|| (isFloating() && style().styleType() == PseudoId::FirstLetter && style().initialLetterDrop() > 0)
|
|
|| shouldApplySizeContainment(*this);
|
|
}
|
|
|
|
LayoutUnit RenderBox::lineHeight(bool /*firstLine*/, LineDirectionMode direction, LinePositionMode /*linePositionMode*/) const
|
|
{
|
|
if (isReplaced())
|
|
return direction == HorizontalLine ? m_marginBox.top() + height() + m_marginBox.bottom() : m_marginBox.right() + width() + m_marginBox.left();
|
|
return 0;
|
|
}
|
|
|
|
LayoutUnit RenderBox::baselinePosition(FontBaseline baselineType, bool /*firstLine*/, LineDirectionMode direction, LinePositionMode /*linePositionMode*/) const
|
|
{
|
|
if (isReplaced()) {
|
|
auto result = roundToInt(direction == HorizontalLine ? m_marginBox.top() + height() + m_marginBox.bottom() : m_marginBox.right() + width() + m_marginBox.left());
|
|
if (baselineType == AlphabeticBaseline)
|
|
return result;
|
|
return result - result / 2;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
RenderLayer* RenderBox::enclosingFloatPaintingLayer() const
|
|
{
|
|
for (auto& box : lineageOfType<RenderBox>(*this)) {
|
|
if (box.layer() && box.layer()->isSelfPaintingLayer())
|
|
return box.layer();
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
LayoutRect RenderBox::logicalVisualOverflowRectForPropagation(const RenderStyle* parentStyle) const
|
|
{
|
|
LayoutRect rect = visualOverflowRectForPropagation(parentStyle);
|
|
if (!parentStyle->isHorizontalWritingMode())
|
|
return rect.transposedRect();
|
|
return rect;
|
|
}
|
|
|
|
LayoutRect RenderBox::visualOverflowRectForPropagation(const RenderStyle* parentStyle) const
|
|
{
|
|
// If the writing modes of the child and parent match, then we don't have to
|
|
// do anything fancy. Just return the result.
|
|
LayoutRect rect = visualOverflowRect();
|
|
if (parentStyle->writingMode() == style().writingMode())
|
|
return rect;
|
|
|
|
// We are putting ourselves into our parent's coordinate space. If there is a flipped block mismatch
|
|
// in a particular axis, then we have to flip the rect along that axis.
|
|
if (style().writingMode() == WritingMode::RightToLeft || parentStyle->writingMode() == WritingMode::RightToLeft)
|
|
rect.setX(width() - rect.maxX());
|
|
else if (style().writingMode() == WritingMode::BottomToTop || parentStyle->writingMode() == WritingMode::BottomToTop)
|
|
rect.setY(height() - rect.maxY());
|
|
|
|
return rect;
|
|
}
|
|
|
|
LayoutRect RenderBox::logicalLayoutOverflowRectForPropagation(const RenderStyle* parentStyle) const
|
|
{
|
|
LayoutRect rect = layoutOverflowRectForPropagation(parentStyle);
|
|
if (!parentStyle->isHorizontalWritingMode())
|
|
return rect.transposedRect();
|
|
return rect;
|
|
}
|
|
|
|
LayoutRect RenderBox::layoutOverflowRectForPropagation(const RenderStyle* parentStyle) const
|
|
{
|
|
// Only propagate interior layout overflow if we don't completely clip it.
|
|
LayoutRect rect = borderBoxRect();
|
|
if (!shouldApplyLayoutContainment(*this)) {
|
|
if (style().overflowX() == Overflow::Clip && style().overflowY() == Overflow::Visible) {
|
|
LayoutRect clippedOverflowRect = layoutOverflowRect();
|
|
clippedOverflowRect.setX(rect.x());
|
|
clippedOverflowRect.setWidth(rect.width());
|
|
rect.unite(clippedOverflowRect);
|
|
} else if (style().overflowY() == Overflow::Clip && style().overflowX() == Overflow::Visible) {
|
|
LayoutRect clippedOverflowRect = layoutOverflowRect();
|
|
clippedOverflowRect.setY(rect.y());
|
|
clippedOverflowRect.setHeight(rect.height());
|
|
rect.unite(clippedOverflowRect);
|
|
} else if (!hasNonVisibleOverflow())
|
|
rect.unite(layoutOverflowRect());
|
|
}
|
|
|
|
bool hasTransform = this->hasTransform();
|
|
// While a stickily positioned renderer is also inflow positioned, they stretch the overflow rect with their inflow geometry
|
|
// (as opposed to the paint geometry) because they are not stationary.
|
|
bool paintGeometryAffectsLayoutOverflow = hasTransform || (isInFlowPositioned() && !isStickilyPositioned());
|
|
if (paintGeometryAffectsLayoutOverflow) {
|
|
// If we are relatively positioned or if we have a transform, then we have to convert
|
|
// this rectangle into physical coordinates, apply relative positioning and transforms
|
|
// to it, and then convert it back.
|
|
// It ensures that the overflow rect tracks the paint geometry and not the inflow layout position.
|
|
flipForWritingMode(rect);
|
|
|
|
if (hasTransform && hasLayer())
|
|
rect = layer()->currentTransform().mapRect(rect);
|
|
|
|
if (isInFlowPositioned())
|
|
rect.move(offsetForInFlowPosition());
|
|
|
|
// Now we need to flip back.
|
|
flipForWritingMode(rect);
|
|
}
|
|
|
|
// If the writing modes of the child and parent match, then we don't have to
|
|
// do anything fancy. Just return the result.
|
|
if (parentStyle->writingMode() == style().writingMode())
|
|
return rect;
|
|
|
|
// We are putting ourselves into our parent's coordinate space. If there is a flipped block mismatch
|
|
// in a particular axis, then we have to flip the rect along that axis.
|
|
if (style().writingMode() == WritingMode::RightToLeft || parentStyle->writingMode() == WritingMode::RightToLeft)
|
|
rect.setX(width() - rect.maxX());
|
|
else if (style().writingMode() == WritingMode::BottomToTop || parentStyle->writingMode() == WritingMode::BottomToTop)
|
|
rect.setY(height() - rect.maxY());
|
|
|
|
return rect;
|
|
}
|
|
|
|
LayoutRect RenderBox::flippedClientBoxRect() const
|
|
{
|
|
// Because of the special coordinate system used for overflow rectangles (not quite logical, not
|
|
// quite physical), we need to flip the block progression coordinate in vertical-rl and
|
|
// horizontal-bt writing modes. Apart from that, this method does the same as clientBoxRect().
|
|
|
|
LayoutUnit left = borderLeft();
|
|
LayoutUnit top = borderTop();
|
|
LayoutUnit right = borderRight();
|
|
LayoutUnit bottom = borderBottom();
|
|
// Calculate physical padding box.
|
|
LayoutRect rect(left, top, width() - left - right, height() - top - bottom);
|
|
// Flip block progression axis if writing mode is vertical-rl or horizontal-bt.
|
|
flipForWritingMode(rect);
|
|
// Subtract space occupied by scrollbars. They are at their physical edge in this coordinate
|
|
// system, so order is important here: first flip, then subtract scrollbars.
|
|
if (shouldPlaceVerticalScrollbarOnLeft() && isHorizontalWritingMode())
|
|
rect.move(verticalScrollbarWidth(), 0);
|
|
rect.contract(verticalScrollbarWidth(), horizontalScrollbarHeight());
|
|
return rect;
|
|
}
|
|
|
|
LayoutUnit RenderBox::offsetLeft() const
|
|
{
|
|
return adjustedPositionRelativeToOffsetParent(topLeftLocation()).x();
|
|
}
|
|
|
|
LayoutUnit RenderBox::offsetTop() const
|
|
{
|
|
return adjustedPositionRelativeToOffsetParent(topLeftLocation()).y();
|
|
}
|
|
|
|
LayoutPoint RenderBox::flipForWritingModeForChild(const RenderBox* child, const LayoutPoint& point) const
|
|
{
|
|
if (!style().isFlippedBlocksWritingMode())
|
|
return point;
|
|
|
|
// The child is going to add in its x() and y(), so we have to make sure it ends up in
|
|
// the right place.
|
|
if (isHorizontalWritingMode())
|
|
return LayoutPoint(point.x(), point.y() + height() - child->height() - (2 * child->y()));
|
|
return LayoutPoint(point.x() + width() - child->width() - (2 * child->x()), point.y());
|
|
}
|
|
|
|
void RenderBox::flipForWritingMode(LayoutRect& rect) const
|
|
{
|
|
if (!style().isFlippedBlocksWritingMode())
|
|
return;
|
|
|
|
if (isHorizontalWritingMode())
|
|
rect.setY(height() - rect.maxY());
|
|
else
|
|
rect.setX(width() - rect.maxX());
|
|
}
|
|
|
|
LayoutUnit RenderBox::flipForWritingMode(LayoutUnit position) const
|
|
{
|
|
if (!style().isFlippedBlocksWritingMode())
|
|
return position;
|
|
return logicalHeight() - position;
|
|
}
|
|
|
|
LayoutPoint RenderBox::flipForWritingMode(const LayoutPoint& position) const
|
|
{
|
|
if (!style().isFlippedBlocksWritingMode())
|
|
return position;
|
|
return isHorizontalWritingMode() ? LayoutPoint(position.x(), height() - position.y()) : LayoutPoint(width() - position.x(), position.y());
|
|
}
|
|
|
|
LayoutSize RenderBox::flipForWritingMode(const LayoutSize& offset) const
|
|
{
|
|
if (!style().isFlippedBlocksWritingMode())
|
|
return offset;
|
|
return isHorizontalWritingMode() ? LayoutSize(offset.width(), height() - offset.height()) : LayoutSize(width() - offset.width(), offset.height());
|
|
}
|
|
|
|
FloatPoint RenderBox::flipForWritingMode(const FloatPoint& position) const
|
|
{
|
|
if (!style().isFlippedBlocksWritingMode())
|
|
return position;
|
|
return isHorizontalWritingMode() ? FloatPoint(position.x(), height() - position.y()) : FloatPoint(width() - position.x(), position.y());
|
|
}
|
|
|
|
void RenderBox::flipForWritingMode(FloatRect& rect) const
|
|
{
|
|
if (!style().isFlippedBlocksWritingMode())
|
|
return;
|
|
|
|
if (isHorizontalWritingMode())
|
|
rect.setY(height() - rect.maxY());
|
|
else
|
|
rect.setX(width() - rect.maxX());
|
|
}
|
|
|
|
LayoutPoint RenderBox::topLeftLocation() const
|
|
{
|
|
if (!view().frameView().hasFlippedBlockRenderers())
|
|
return location();
|
|
|
|
RenderBlock* containerBlock = containingBlock();
|
|
if (!containerBlock || containerBlock == this)
|
|
return location();
|
|
return containerBlock->flipForWritingModeForChild(this, location());
|
|
}
|
|
|
|
LayoutSize RenderBox::topLeftLocationOffset() const
|
|
{
|
|
if (!view().frameView().hasFlippedBlockRenderers())
|
|
return locationOffset();
|
|
|
|
RenderBlock* containerBlock = containingBlock();
|
|
if (!containerBlock || containerBlock == this)
|
|
return locationOffset();
|
|
|
|
LayoutRect rect(frameRect());
|
|
containerBlock->flipForWritingMode(rect); // FIXME: This is wrong if we are an absolutely positioned object enclosed by a relative-positioned inline.
|
|
return LayoutSize(rect.x(), rect.y());
|
|
}
|
|
|
|
void RenderBox::applyTopLeftLocationOffsetWithFlipping(LayoutPoint& point) const
|
|
{
|
|
RenderBlock* containerBlock = containingBlock();
|
|
if (!containerBlock || containerBlock == this) {
|
|
point.move(m_frameRect.x(), m_frameRect.y());
|
|
return;
|
|
}
|
|
|
|
LayoutRect rect(frameRect());
|
|
containerBlock->flipForWritingMode(rect); // FIXME: This is wrong if we are an absolutely positioned object enclosed by a relative-positioned inline.
|
|
point.move(rect.x(), rect.y());
|
|
}
|
|
|
|
bool RenderBox::shouldIgnoreAspectRatio() const
|
|
{
|
|
return !style().hasAspectRatio() || isTablePart();
|
|
}
|
|
|
|
static inline bool shouldComputeLogicalWidthFromAspectRatioAndInsets(const RenderBox& renderer)
|
|
{
|
|
if (!renderer.isOutOfFlowPositioned())
|
|
return false;
|
|
|
|
auto& style = renderer.style();
|
|
if (!style.logicalWidth().isAuto()) {
|
|
// Not applicable for aspect ratio computation.
|
|
return false;
|
|
}
|
|
// When both left and right are set, the out-of-flow positioned box is horizontally constrained and aspect ratio for the logical width is not applicable.
|
|
auto hasConstrainedWidth = (!style.logicalLeft().isAuto() && !style.logicalRight().isAuto()) || renderer.intrinsicLogicalWidth();
|
|
if (hasConstrainedWidth)
|
|
return false;
|
|
|
|
// When both top and bottom are set, the out-of-flow positioned box is vertically constrained and it can be used as if it had a non-auto height value.
|
|
auto hasConstrainedHeight = !style.logicalTop().isAuto() && !style.logicalBottom().isAuto();
|
|
if (!hasConstrainedHeight)
|
|
return false;
|
|
// FIXME: This could probably be omitted and let the callers handle the height check (as they seem to be doing anyway).
|
|
return style.logicalHeight().isAuto();
|
|
}
|
|
|
|
bool RenderBox::shouldComputeLogicalHeightFromAspectRatio() const
|
|
{
|
|
if (shouldIgnoreAspectRatio())
|
|
return false;
|
|
|
|
if (shouldComputeLogicalWidthFromAspectRatioAndInsets(*this))
|
|
return false;
|
|
|
|
auto h = style().logicalHeight();
|
|
return h.isAuto() || h.isIntrinsic() || (!isOutOfFlowPositioned() && h.isPercentOrCalculated() && !percentageLogicalHeightIsResolvable());
|
|
}
|
|
|
|
bool RenderBox::shouldComputeLogicalWidthFromAspectRatio() const
|
|
{
|
|
if (shouldIgnoreAspectRatio())
|
|
return false;
|
|
|
|
if (isGridItem()) {
|
|
if (shouldComputeSizeAsReplaced()) {
|
|
if (hasStretchedLogicalWidth() && hasStretchedLogicalHeight())
|
|
return false;
|
|
} else if (hasStretchedLogicalWidth(StretchingMode::Explicit))
|
|
return false;
|
|
}
|
|
|
|
auto isResolvablePercentageHeight = [&] {
|
|
return style().logicalHeight().isPercentOrCalculated() && (isOutOfFlowPositioned() || percentageLogicalHeightIsResolvable());
|
|
};
|
|
return hasOverridingLogicalHeight() || shouldComputeLogicalWidthFromAspectRatioAndInsets(*this) || style().logicalHeight().isFixed() || isResolvablePercentageHeight();
|
|
}
|
|
|
|
LayoutUnit RenderBox::computeLogicalWidthFromAspectRatioInternal() const
|
|
{
|
|
ASSERT(shouldComputeLogicalWidthFromAspectRatio());
|
|
auto computedValues = computeLogicalHeight(logicalHeight(), logicalTop());
|
|
LayoutUnit logicalHeightforAspectRatio = computedValues.m_extent;
|
|
|
|
return inlineSizeFromAspectRatio(horizontalBorderAndPaddingExtent(), verticalBorderAndPaddingExtent(), LayoutUnit(style().logicalAspectRatio()), style().boxSizingForAspectRatio(), logicalHeightforAspectRatio);
|
|
}
|
|
|
|
LayoutUnit RenderBox::computeLogicalWidthFromAspectRatio(RenderFragmentContainer* fragment) const
|
|
{
|
|
auto logicalWidth = computeLogicalWidthFromAspectRatioInternal();
|
|
LayoutUnit containerWidthInInlineDirection = std::max<LayoutUnit>(0, containingBlockLogicalWidthForContentInFragment(fragment));
|
|
return constrainLogicalWidthInFragmentByMinMax(logicalWidth, containerWidthInInlineDirection, *containingBlock(), fragment, AllowIntrinsic::No);
|
|
}
|
|
|
|
std::pair<LayoutUnit, LayoutUnit> RenderBox::computeMinMaxLogicalWidthFromAspectRatio() const
|
|
{
|
|
auto ratio = LayoutUnit { style().logicalAspectRatio() };
|
|
LayoutUnit blockMinSize = constrainLogicalHeightByMinMax(LayoutUnit(), std::nullopt);
|
|
LayoutUnit blockMaxSize = constrainLogicalHeightByMinMax(LayoutUnit::max(), std::nullopt);
|
|
LayoutUnit transferredMinSize = LayoutUnit();
|
|
LayoutUnit transferredMaxSize = LayoutUnit::max();
|
|
if (blockMinSize > LayoutUnit())
|
|
transferredMinSize = inlineSizeFromAspectRatio(horizontalBorderAndPaddingExtent(), verticalBorderAndPaddingExtent(), ratio, style().boxSizingForAspectRatio(), blockMinSize);
|
|
if (blockMaxSize != LayoutUnit::max())
|
|
transferredMaxSize = inlineSizeFromAspectRatio(horizontalBorderAndPaddingExtent(), verticalBorderAndPaddingExtent(), ratio, style().boxSizingForAspectRatio(), blockMaxSize);
|
|
// Minimum size wins over maximum size.
|
|
transferredMaxSize = std::max(transferredMaxSize, transferredMinSize);
|
|
return { transferredMinSize, transferredMaxSize };
|
|
}
|
|
|
|
bool RenderBox::hasRelativeDimensions() const
|
|
{
|
|
return style().height().isPercentOrCalculated() || style().width().isPercentOrCalculated()
|
|
|| style().maxHeight().isPercentOrCalculated() || style().maxWidth().isPercentOrCalculated()
|
|
|| style().minHeight().isPercentOrCalculated() || style().minWidth().isPercentOrCalculated();
|
|
}
|
|
|
|
bool RenderBox::hasRelativeLogicalHeight() const
|
|
{
|
|
return style().logicalHeight().isPercentOrCalculated()
|
|
|| style().logicalMinHeight().isPercentOrCalculated()
|
|
|| style().logicalMaxHeight().isPercentOrCalculated();
|
|
}
|
|
|
|
bool RenderBox::hasRelativeLogicalWidth() const
|
|
{
|
|
return style().logicalWidth().isPercentOrCalculated()
|
|
|| style().logicalMinWidth().isPercentOrCalculated()
|
|
|| style().logicalMaxWidth().isPercentOrCalculated();
|
|
}
|
|
|
|
LayoutUnit RenderBox::offsetFromLogicalTopOfFirstPage() const
|
|
{
|
|
auto* layoutState = view().frameView().layoutContext().layoutState();
|
|
if ((layoutState && !layoutState->isPaginated()) || (!layoutState && !enclosingFragmentedFlow()))
|
|
return 0;
|
|
|
|
RenderBlock* containerBlock = containingBlock();
|
|
return containerBlock->offsetFromLogicalTopOfFirstPage() + logicalTop();
|
|
}
|
|
|
|
LayoutRect RenderBox::absoluteAnchorRectWithScrollMargin(bool* insideFixed) const
|
|
{
|
|
LayoutRect anchorRect = absoluteAnchorRect(insideFixed);
|
|
const LengthBox& scrollMargin = style().scrollMargin();
|
|
if (scrollMargin.isZero())
|
|
return anchorRect;
|
|
|
|
// The scroll snap specification says that the scroll-margin should be applied in the
|
|
// coordinate system of the scroll container and applied to the rectangular bounding
|
|
// box of the transformed border box of the target element.
|
|
// See https://www.w3.org/TR/css-scroll-snap-1/#scroll-margin.
|
|
const LayoutSize boxSize = size();
|
|
const LayoutBoxExtent margin(
|
|
valueForLength(scrollMargin.top(), boxSize.height()),
|
|
valueForLength(scrollMargin.right(), boxSize.width()),
|
|
valueForLength(scrollMargin.bottom(), boxSize.height()),
|
|
valueForLength(scrollMargin.left(), boxSize.width()));
|
|
anchorRect.expand(margin);
|
|
|
|
return anchorRect;
|
|
}
|
|
|
|
LayoutBoxExtent RenderBox::scrollPaddingForViewportRect(const LayoutRect& viewportRect)
|
|
{
|
|
// We are using minimumValueForLength here, because scroll-padding values might be "auto". WebKit currently
|
|
// interprets "auto" as 0. See: https://drafts.csswg.org/css-scroll-snap-1/#propdef-scroll-padding
|
|
const auto& padding = style().scrollPadding();
|
|
return LayoutBoxExtent(
|
|
minimumValueForLength(padding.top(), viewportRect.height()), minimumValueForLength(padding.right(), viewportRect.width()),
|
|
minimumValueForLength(padding.bottom(), viewportRect.height()), minimumValueForLength(padding.left(), viewportRect.width()));
|
|
}
|
|
|
|
LayoutUnit synthesizedBaselineFromBorderBox(const RenderBox& box, LineDirectionMode direction)
|
|
{
|
|
return direction == HorizontalLine ? box.height() : box.width();
|
|
}
|
|
|
|
} // namespace WebCore
|