| File: | Volumes/Data/worker/Apple-iOS-26-Safer-CPP-Checks-EWS/build/Source/WebCore/rendering/RenderBlock.cpp |
| Warning: | line 483, column 25 A function 'isDelayingUpdateScrollInfoAfterLayout' has [[clang::annotate_type("webkit.nodelete")]] but it contains code that could destruct an object |
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| 1 | /* |
| 2 | * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| 3 | * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| 4 | * (C) 2007 David Smith (catfish.man@gmail.com) |
| 5 | * Copyright (C) 2003-2025 Apple Inc. All rights reserved. |
| 6 | * Copyright (C) Research In Motion Limited 2010. All rights reserved. |
| 7 | * Copyright (C) 2026 Samuel Weinig <sam@webkit.org> |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU Library General Public |
| 11 | * License as published by the Free Software Foundation; either |
| 12 | * version 2 of the License, or (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * Library General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Library General Public License |
| 20 | * along with this library; see the file COPYING.LIB. If not, write to |
| 21 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 22 | * Boston, MA 02110-1301, USA. |
| 23 | */ |
| 24 | |
| 25 | #include "config.h" |
| 26 | #include "RenderBlock.h" |
| 27 | |
| 28 | #include "AXObjectCache.h" |
| 29 | #include "BorderShape.h" |
| 30 | #include "ContainerNodeInlines.h" |
| 31 | #include "Editor.h" |
| 32 | #include "Element.h" |
| 33 | #include "ElementInlines.h" |
| 34 | #include "EventRegion.h" |
| 35 | #include "EventTargetInlines.h" |
| 36 | #include "FloatQuad.h" |
| 37 | #include "FrameSelection.h" |
| 38 | #include "GraphicsContext.h" |
| 39 | #include "HTMLNames.h" |
| 40 | #include "HTMLTextFormControlElement.h" |
| 41 | #include "HitTestLocation.h" |
| 42 | #include "HitTestResult.h" |
| 43 | #include "ImageBuffer.h" |
| 44 | #include "InlineIteratorInlineBox.h" |
| 45 | #include "LayoutRepainter.h" |
| 46 | #include "LayoutScope.h" |
| 47 | #include "LocalFrame.h" |
| 48 | #include "LocalFrameView.h" |
| 49 | #include "Logging.h" |
| 50 | #include "LogicalSelectionOffsetCachesInlines.h" |
| 51 | #include "OutlinePainter.h" |
| 52 | #include "Page.h" |
| 53 | #include "PaintInfo.h" |
| 54 | #include "PaintInfoInlines.h" |
| 55 | #include "RenderBlockFlow.h" |
| 56 | #include "RenderBlockInlines.h" |
| 57 | #include "RenderBoxFragmentInfo.h" |
| 58 | #include "RenderBoxInlines.h" |
| 59 | #include "RenderButton.h" |
| 60 | #include "RenderChildIterator.h" |
| 61 | #include "RenderCombineText.h" |
| 62 | #include "RenderDeprecatedFlexibleBox.h" |
| 63 | #include "RenderElementStyleInlines.h" |
| 64 | #include "RenderFlexibleBox.h" |
| 65 | #include "RenderFragmentedFlow.h" |
| 66 | #include "RenderGrid.h" |
| 67 | #include "RenderInline.h" |
| 68 | #include "RenderIterator.h" |
| 69 | #include "RenderLayer.h" |
| 70 | #include "RenderLayerScrollableArea.h" |
| 71 | #include "RenderLayoutState.h" |
| 72 | #include "RenderListMarker.h" |
| 73 | #include "RenderMenuList.h" |
| 74 | #include "RenderObjectInlines.h" |
| 75 | #include "RenderTableCell.h" |
| 76 | #include "RenderTextControl.h" |
| 77 | #include "RenderTextFragment.h" |
| 78 | #include "RenderTheme.h" |
| 79 | #include "RenderTreeBuilder.h" |
| 80 | #include "RenderTreePosition.h" |
| 81 | #include "RenderView.h" |
| 82 | #include "Settings.h" |
| 83 | #include "ShadowRoot.h" |
| 84 | #include "ShapeOutsideInfo.h" |
| 85 | #include "StyleContainmentCheckerInlines.h" |
| 86 | #include "TransformState.h" |
| 87 | #include <wtf/NeverDestroyed.h> |
| 88 | #include <wtf/SetForScope.h> |
| 89 | #include <wtf/StackStats.h> |
| 90 | #include <wtf/TZoneMallocInlines.h> |
| 91 | #include <wtf/text/TextStream.h> |
| 92 | |
| 93 | namespace WebCore { |
| 94 | |
| 95 | using namespace HTMLNames; |
| 96 | using namespace WTF::Unicode; |
| 97 | |
| 98 | WTF_MAKE_TZONE_ALLOCATED_IMPL(RenderBlock)::bmalloc::api::HeapRef RenderBlock::s_heapRef; const TZoneSpecification RenderBlock::s_heapSpec = { &RenderBlock::s_heapRef, TZoneSpecification ::encodeSize<RenderBlock>(), TZoneSpecification::encodeAlignment <RenderBlock>(), TZoneSpecification::encodeCategory< RenderBlock>(), ::bmalloc::api::compactAllocationMode<RenderBlock >(), TZoneSpecification::encodeDescriptor<RenderBlock> (), }; void* RenderBlock::operatorNewSlow(size_t size) { if constexpr (::bmalloc::api::compactAllocationMode<RenderBlock>() == CompactAllocationMode::Compact) return ::bmalloc::api::tzoneAllocateCompactSlow (size, s_heapSpec); return ::bmalloc::api::tzoneAllocateNonCompactSlow (size, s_heapSpec); } using __makeBtzoneMallocedInlineMacroSemicolonifier __attribute__((unused)) = int; |
| 99 | |
| 100 | struct SameSizeAsRenderBlock : public RenderBox { |
| 101 | }; |
| 102 | |
| 103 | static_assert(sizeof(RenderBlock) == sizeof(SameSizeAsRenderBlock), "RenderBlock should stay small"); |
| 104 | |
| 105 | using TrackedDescendantsMap = SingleThreadWeakHashMap<const RenderBlock, std::unique_ptr<TrackedRendererListHashSet>>; |
| 106 | using TrackedContainerMap = SingleThreadWeakHashMap<const RenderBox, SingleThreadWeakHashSet<const RenderBlock>>; |
| 107 | |
| 108 | static TrackedDescendantsMap* percentHeightDescendantsMap; |
| 109 | static TrackedContainerMap* percentHeightContainerMap; |
| 110 | |
| 111 | static void insertIntoTrackedRendererMaps(const RenderBlock& container, RenderBox& descendant) |
| 112 | { |
| 113 | if (!percentHeightDescendantsMap) { |
| 114 | percentHeightDescendantsMap = new TrackedDescendantsMap; |
| 115 | percentHeightContainerMap = new TrackedContainerMap; |
| 116 | } |
| 117 | |
| 118 | auto& descendantSet = percentHeightDescendantsMap->ensure(container, [] { |
| 119 | return makeUnique<TrackedRendererListHashSet>(); |
| 120 | }).iterator->value; |
| 121 | |
| 122 | bool added = descendantSet->add(descendant).isNewEntry; |
| 123 | if (!added) { |
| 124 | #if ASSERT_ENABLED0 |
| 125 | auto it = percentHeightContainerMap->find(descendant); |
| 126 | ASSERT(it != percentHeightContainerMap->end())((void)0); |
| 127 | ASSERT(it->value.contains(container))((void)0); |
| 128 | #endif |
| 129 | return; |
| 130 | } |
| 131 | |
| 132 | auto& containerSet = percentHeightContainerMap->add(descendant, SingleThreadWeakHashSet<const RenderBlock>()).iterator->value; |
| 133 | ASSERT(!containerSet.contains(container))((void)0); |
| 134 | containerSet.add(container); |
| 135 | } |
| 136 | |
| 137 | static void removeFromTrackedRendererMaps(RenderBox& descendant) |
| 138 | { |
| 139 | if (!percentHeightDescendantsMap) |
| 140 | return; |
| 141 | |
| 142 | auto containerSet = percentHeightContainerMap->take(descendant); |
| 143 | for (auto& container : containerSet) { |
| 144 | // FIXME: Disabling this assert temporarily until we fix the layout |
| 145 | // bugs associated with positioned objects not properly cleared from |
| 146 | // their ancestor chain before being moved. See webkit bug 93766. |
| 147 | // ASSERT(descendant->isDescendantOf(container)); |
| 148 | auto descendantsMapIterator = percentHeightDescendantsMap->find(container); |
| 149 | ASSERT(descendantsMapIterator != percentHeightDescendantsMap->end())((void)0); |
| 150 | if (descendantsMapIterator == percentHeightDescendantsMap->end()) |
| 151 | continue; |
| 152 | auto& descendantSet = descendantsMapIterator->value; |
| 153 | ASSERT(descendantSet->contains(descendant))((void)0); |
| 154 | descendantSet->remove(descendant); |
| 155 | if (descendantSet->isEmptyIgnoringNullReferences()) |
| 156 | percentHeightDescendantsMap->remove(descendantsMapIterator); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | class OutOfFlowDescendantsMap { |
| 161 | public: |
| 162 | void addDescendant(const RenderBlock& containingBlock, RenderBox& outOfFlowDescendant) |
| 163 | { |
| 164 | // Protect against double insert where a descendant would end up with multiple containing blocks. |
| 165 | auto previousContainingBlock = m_containerMap.get(outOfFlowDescendant); |
| 166 | if (previousContainingBlock && previousContainingBlock != &containingBlock) { |
| 167 | if (auto* descendants = m_descendantsMap.get(*previousContainingBlock)) |
| 168 | descendants->remove(outOfFlowDescendant); |
| 169 | } |
| 170 | |
| 171 | auto& descendants = m_descendantsMap.ensure(containingBlock, [] { |
| 172 | return makeUnique<TrackedRendererListHashSet>(); |
| 173 | }).iterator->value; |
| 174 | |
| 175 | auto isNewEntry = false; |
| 176 | if (!is<RenderView>(containingBlock) || descendants->isEmptyIgnoringNullReferences()) |
| 177 | isNewEntry = descendants->add(outOfFlowDescendant).isNewEntry; |
| 178 | else if (outOfFlowDescendant.isFixedPositioned() || isInTopLayerOrBackdrop(outOfFlowDescendant.style(), outOfFlowDescendant.element())) |
| 179 | isNewEntry = descendants->appendOrMoveToLast(outOfFlowDescendant).isNewEntry; |
| 180 | else { |
| 181 | auto ensureLayoutDepentBoxPosition = [&] { |
| 182 | // RenderView is a special containing block as it may hold both absolute and fixed positioned containing blocks. |
| 183 | // When a fixed positioned box is also a descendant of an absolute positioned box anchored to the RenderView, |
| 184 | // we have to make sure that the absolute positioned box is inserted before the fixed box to follow |
| 185 | // block layout dependency. |
| 186 | for (auto it = descendants->begin(); it != descendants->end(); ++it) { |
| 187 | if (it->isFixedPositioned()) { |
| 188 | isNewEntry = descendants->insertBefore(it, outOfFlowDescendant).isNewEntry; |
| 189 | return; |
| 190 | } |
| 191 | } |
| 192 | isNewEntry = descendants->appendOrMoveToLast(outOfFlowDescendant).isNewEntry; |
| 193 | }; |
| 194 | ensureLayoutDepentBoxPosition(); |
| 195 | } |
| 196 | |
| 197 | if (!isNewEntry) { |
| 198 | ASSERT(m_containerMap.contains(outOfFlowDescendant))((void)0); |
| 199 | return; |
| 200 | } |
| 201 | m_containerMap.set(outOfFlowDescendant, containingBlock); |
| 202 | } |
| 203 | |
| 204 | void removeDescendant(const RenderBox& outOfFlowDescendant) |
| 205 | { |
| 206 | auto containingBlock = m_containerMap.take(outOfFlowDescendant); |
| 207 | if (!containingBlock) |
| 208 | return; |
| 209 | |
| 210 | auto descendantsIterator = m_descendantsMap.find(*containingBlock.get()); |
| 211 | ASSERT(descendantsIterator != m_descendantsMap.end())((void)0); |
| 212 | if (descendantsIterator == m_descendantsMap.end()) |
| 213 | return; |
| 214 | |
| 215 | auto& descendants = descendantsIterator->value; |
| 216 | ASSERT(descendants->contains(const_cast<RenderBox&>(outOfFlowDescendant)))((void)0); |
| 217 | |
| 218 | descendants->remove(const_cast<RenderBox&>(outOfFlowDescendant)); |
| 219 | if (descendants->isEmptyIgnoringNullReferences()) |
| 220 | m_descendantsMap.remove(descendantsIterator); |
| 221 | } |
| 222 | |
| 223 | void removeContainingBlock(const RenderBlock& containingBlock) |
| 224 | { |
| 225 | auto descendants = m_descendantsMap.take(containingBlock); |
| 226 | if (!descendants) |
| 227 | return; |
| 228 | |
| 229 | for (auto& renderer : *descendants) |
| 230 | m_containerMap.remove(renderer); |
| 231 | } |
| 232 | |
| 233 | TrackedRendererListHashSet* positionedRenderers(const RenderBlock& containingBlock) const |
| 234 | { |
| 235 | return m_descendantsMap.get(containingBlock); |
| 236 | } |
| 237 | |
| 238 | private: |
| 239 | using DescendantsMap = SingleThreadWeakHashMap<const RenderBlock, std::unique_ptr<TrackedRendererListHashSet>>; |
| 240 | using ContainerMap = SingleThreadWeakHashMap<const RenderBox, SingleThreadWeakPtr<const RenderBlock>>; |
| 241 | |
| 242 | DescendantsMap m_descendantsMap; |
| 243 | ContainerMap m_containerMap; |
| 244 | }; |
| 245 | |
| 246 | static OutOfFlowDescendantsMap& outOfFlowDescendantsMap() |
| 247 | { |
| 248 | static NeverDestroyed<OutOfFlowDescendantsMap> mapForOutOfFlowDescendants; |
| 249 | return mapForOutOfFlowDescendants; |
| 250 | } |
| 251 | |
| 252 | using ContinuationOutlineTableMap = SingleThreadWeakHashMap<RenderBlock, std::unique_ptr<SingleThreadWeakListHashSet<RenderInline>>>; |
| 253 | |
| 254 | // Allocated only when some of these fields have non-default values |
| 255 | |
| 256 | struct RenderBlockRareData { |
| 257 | WTF_MAKE_TZONE_ALLOCATED_INLINE(RenderBlockRareData)public: public: using HeapRef = ::bmalloc::api::HeapRef; using TZoneDescriptor = ::bmalloc::api::TZoneDescriptor; using TZoneMallocFallback = ::bmalloc::api::TZoneMallocFallback; using CompactAllocationMode = ::bmalloc::CompactAllocationMode; static constexpr bool usesTZoneHeap () { return true; } static constexpr unsigned inheritedSizeClass () { return ::bmalloc::TZone::sizeClass<RenderBlockRareData >(); } static constexpr unsigned inheritedAlignment() { return ::bmalloc::TZone::alignment<RenderBlockRareData>(); } __attribute__ ((always_inline)) inline void* operator new(size_t, void* p) { return p; } __attribute__((always_inline)) inline void* operator new[](size_t, void* p) { return p; } void* operator new[](size_t size) = delete; void operator delete[](void* p) = delete; __attribute__ ((always_inline)) inline void* operator new(size_t, NotNullTag , void* location) { ((void)0); return location; } void* operator new(size_t size) { static HeapRef s_heapRef; static const TZoneSpecification s_heapSpec = { &s_heapRef, TZoneSpecification::encodeSize <RenderBlockRareData>(), TZoneSpecification::encodeAlignment <RenderBlockRareData>(), TZoneSpecification::encodeCategory <RenderBlockRareData>(), ::bmalloc::api::compactAllocationMode <RenderBlockRareData>(), TZoneSpecification::encodeDescriptor <RenderBlockRareData>(), }; if (!s_heapRef || size != sizeof (RenderBlockRareData)) { [[unlikely]] if constexpr (::bmalloc ::api::compactAllocationMode<RenderBlockRareData>() == CompactAllocationMode ::Compact) return ::bmalloc::api::tzoneAllocateCompactSlow(size , s_heapSpec); return ::bmalloc::api::tzoneAllocateNonCompactSlow (size, s_heapSpec); } ; if constexpr (::bmalloc::api::compactAllocationMode <RenderBlockRareData>() == CompactAllocationMode::Compact ) return ::bmalloc::api::tzoneAllocateCompact(s_heapRef); return ::bmalloc::api::tzoneAllocateNonCompact(s_heapRef); } __attribute__ ((always_inline)) inline void operator delete(void* p) { ::bmalloc ::api::tzoneFree(p); } __attribute__((always_inline)) inline static void freeAfterDestruction(void* p) { ::bmalloc::api::tzoneFree (p); } using WTFIsFastMallocAllocated = int; private: using __makeBtzoneMallocedInlineMacroSemicolonifier __attribute__((unused)) = int; |
| 258 | WTF_MAKE_NONCOPYABLE(RenderBlockRareData)RenderBlockRareData(const RenderBlockRareData&) = delete; RenderBlockRareData& operator=(const RenderBlockRareData &) = delete;; |
| 259 | public: |
| 260 | RenderBlockRareData() |
| 261 | { |
| 262 | } |
| 263 | |
| 264 | LayoutUnit m_paginationStrut; |
| 265 | LayoutUnit m_pageLogicalOffset; |
| 266 | LayoutUnit m_intrinsicBorderForFieldset; |
| 267 | |
| 268 | std::optional<SingleThreadWeakPtr<RenderFragmentedFlow>> m_enclosingFragmentedFlow; |
| 269 | }; |
| 270 | |
| 271 | using RenderBlockRareDataMap = SingleThreadWeakHashMap<const RenderBlock, std::unique_ptr<RenderBlockRareData>>; |
| 272 | static RenderBlockRareDataMap* gRareDataMap; |
| 273 | |
| 274 | RenderBlock::RenderBlock(Type type, Element& element, RenderStyle&& style, OptionSet<TypeFlag> baseTypeFlags, TypeSpecificFlags typeSpecificFlags) |
| 275 | : RenderBox(type, element, WTF::move(style), baseTypeFlags | TypeFlag::IsRenderBlock, typeSpecificFlags) |
| 276 | { |
| 277 | ASSERT(isRenderBlock())((void)0); |
| 278 | } |
| 279 | |
| 280 | RenderBlock::RenderBlock(Type type, Document& document, RenderStyle&& style, OptionSet<TypeFlag> baseTypeFlags, TypeSpecificFlags typeSpecificFlags) |
| 281 | : RenderBox(type, document, WTF::move(style), baseTypeFlags | TypeFlag::IsRenderBlock, typeSpecificFlags) |
| 282 | { |
| 283 | ASSERT(isRenderBlock())((void)0); |
| 284 | } |
| 285 | |
| 286 | RenderBlock::~RenderBlock() |
| 287 | { |
| 288 | // Blocks can be added to gRareDataMap during willBeDestroyed(), so this code can't move there. |
| 289 | if (renderBlockHasRareData()) |
| 290 | gRareDataMap->remove(*this); |
| 291 | |
| 292 | // Do not add any more code here. Add it to willBeDestroyed() instead. |
| 293 | } |
| 294 | |
| 295 | void RenderBlock::styleWillChange(Style::Difference diff, const RenderStyle& newStyle) |
| 296 | { |
| 297 | const RenderStyle* oldStyle = hasInitializedStyle() ? &style() : nullptr; |
| 298 | setBlockLevelReplacedOrAtomicInline(newStyle.display().isInlineType()); |
| 299 | if (oldStyle) { |
| 300 | removeOutOfFlowBoxesIfNeededOnStyleChange(*this, *oldStyle, newStyle); |
| 301 | if (isLegend() && oldStyle->floating() == Float::None && newStyle.floating() != Float::None) |
| 302 | setIsExcludedFromNormalLayout(false); |
| 303 | } |
| 304 | RenderBox::styleWillChange(diff, newStyle); |
| 305 | } |
| 306 | |
| 307 | bool RenderBlock::scrollbarWidthDidChange(const RenderStyle& oldStyle, const RenderStyle& newStyle, ScrollbarOrientation orientation) |
| 308 | { |
| 309 | return (orientation == ScrollbarOrientation::Vertical ? includeVerticalScrollbarSize() : includeHorizontalScrollbarSize()) && oldStyle.scrollbarWidth() != newStyle.scrollbarWidth(); |
| 310 | } |
| 311 | |
| 312 | bool RenderBlock::contentBoxLogicalWidthChanged(const RenderStyle& oldStyle, const RenderStyle& newStyle) |
| 313 | { |
| 314 | if (newStyle.writingMode().isHorizontal()) { |
| 315 | return oldStyle.usedBorderLeftWidth() != newStyle.usedBorderLeftWidth() |
| 316 | || oldStyle.usedBorderRightWidth() != newStyle.usedBorderRightWidth() |
| 317 | || oldStyle.paddingLeft() != newStyle.paddingLeft() |
| 318 | || oldStyle.paddingRight() != newStyle.paddingRight() |
| 319 | || scrollbarWidthDidChange(oldStyle, newStyle, ScrollbarOrientation::Vertical); |
| 320 | } |
| 321 | |
| 322 | return oldStyle.usedBorderTopWidth() != newStyle.usedBorderTopWidth() |
| 323 | || oldStyle.usedBorderBottomWidth() != newStyle.usedBorderBottomWidth() |
| 324 | || oldStyle.paddingTop() != newStyle.paddingTop() |
| 325 | || oldStyle.paddingBottom() != newStyle.paddingBottom() |
| 326 | || scrollbarWidthDidChange(oldStyle, newStyle, ScrollbarOrientation::Horizontal); |
| 327 | } |
| 328 | |
| 329 | bool RenderBlock::paddingBoxLogicaHeightChanged(const RenderStyle& oldStyle, const RenderStyle& newStyle) |
| 330 | { |
| 331 | auto scrollbarHeightDidChange = [&] (auto orientation) { |
| 332 | return (orientation == ScrollbarOrientation::Vertical ? includeVerticalScrollbarSize() : includeHorizontalScrollbarSize()) && oldStyle.scrollbarWidth() != newStyle.scrollbarWidth(); |
| 333 | }; |
| 334 | if (newStyle.writingMode().isHorizontal()) |
| 335 | return oldStyle.usedBorderTopWidth() != newStyle.usedBorderTopWidth() || oldStyle.usedBorderBottomWidth() != newStyle.usedBorderBottomWidth() || scrollbarHeightDidChange(ScrollbarOrientation::Horizontal); |
| 336 | return oldStyle.usedBorderLeftWidth() != newStyle.usedBorderLeftWidth() || oldStyle.usedBorderRightWidth() != newStyle.usedBorderRightWidth() || scrollbarHeightDidChange(ScrollbarOrientation::Vertical); |
| 337 | } |
| 338 | |
| 339 | void RenderBlock::styleDidChange(Style::Difference diff, const RenderStyle* oldStyle) |
| 340 | { |
| 341 | RenderBox::styleDidChange(diff, oldStyle); |
| 342 | |
| 343 | if (oldStyle) |
| 344 | adjustFragmentedFlowStateOnContainingBlockChangeIfNeeded(*oldStyle, style()); |
| 345 | |
| 346 | propagateStyleToAnonymousChildren(StylePropagationType::BlockAndRubyChildren); |
| 347 | |
| 348 | // It's possible for our border/padding to change, but for the overall logical width of the block to |
| 349 | // end up being the same. We keep track of this change so in layoutBlock, we can know to set relayoutChildren=true. |
| 350 | auto shouldForceRelayoutChildren = false; |
| 351 | if (oldStyle && diff == Style::DifferenceResult::Layout && needsLayout()) { |
| 352 | // Out-of-flow boxes anchored to the padding box. |
| 353 | shouldForceRelayoutChildren = contentBoxLogicalWidthChanged(*oldStyle, style()) || (outOfFlowBoxes() && paddingBoxLogicaHeightChanged(*oldStyle, style())); |
| 354 | } |
| 355 | setShouldForceRelayoutChildren(shouldForceRelayoutChildren); |
| 356 | } |
| 357 | |
| 358 | bool RenderBlock::childrenPreventSelfCollapsing() const |
| 359 | { |
| 360 | // Whether or not we collapse is dependent on whether all our normal flow children |
| 361 | // are also self-collapsing. |
| 362 | for (RenderBox* child = firstChildBox(); child; child = child->nextSiblingBox()) { |
| 363 | if (child->isFloatingOrOutOfFlowPositioned()) |
| 364 | continue; |
| 365 | if (!child->isSelfCollapsingBlock()) |
| 366 | return true; |
| 367 | } |
| 368 | return false; |
| 369 | } |
| 370 | |
| 371 | bool RenderBlock::isSelfCollapsingBlock() const |
| 372 | { |
| 373 | // We are not self-collapsing if we |
| 374 | // (a) have a non-zero height according to layout (an optimization to avoid wasting time) |
| 375 | // (b) are a table, |
| 376 | // (c) have border/padding, |
| 377 | // (d) have a min-height |
| 378 | // (e) have specified that one of our margins can't collapse using a CSS extension |
| 379 | |
| 380 | if (isOutOfFlowPositioned()) |
| 381 | return false; |
| 382 | |
| 383 | auto minHeightIsPositive = [&] { |
| 384 | return WTF::switchOn(style().logicalMinHeight(), |
| 385 | [](const Style::MinimumSize::Fixed& fixedValue) { |
| 386 | return fixedValue.isPositive(); |
| 387 | }, |
| 388 | [&](const Style::MinimumSize::Percentage& percentageValue) { |
| 389 | return percentageValue.isPositive(); |
| 390 | }, |
| 391 | [&](const Style::PreferredSize::Calc&) { |
| 392 | return true; |
| 393 | }, |
| 394 | [](const auto&) { |
| 395 | return false; |
| 396 | } |
| 397 | ); |
| 398 | }; |
| 399 | |
| 400 | auto heightIsZeroOrAuto = [&] { |
| 401 | auto handleNonZeroPercentageOrCalc = [&] { |
| 402 | // While in quirks mode there's always a fixed height ancestor to resolve percent value against (ICB), |
| 403 | // in standards mode we can only use the containing block. |
| 404 | if (document().inQuirksMode()) |
| 405 | return false; |
| 406 | CheckedPtr containingBlock = this->containingBlock(); |
| 407 | if (!containingBlock) { |
| 408 | ASSERT_NOT_REACHED()((void)0); |
| 409 | return false; |
| 410 | } |
| 411 | return is<RenderView>(*containingBlock) || !containingBlock->style().logicalHeight().isFixed(); |
| 412 | }; |
| 413 | |
| 414 | return WTF::switchOn(style().logicalHeight(), |
| 415 | [](const Style::PreferredSize::Fixed& fixedValue) { |
| 416 | return fixedValue.isZero(); |
| 417 | }, |
| 418 | [&](const Style::PreferredSize::Percentage& percentageValue) { |
| 419 | if (percentageValue.isZero()) |
| 420 | return true; |
| 421 | return handleNonZeroPercentageOrCalc(); |
| 422 | }, |
| 423 | [&](const Style::PreferredSize::Calc&) { |
| 424 | return handleNonZeroPercentageOrCalc(); |
| 425 | }, |
| 426 | [](const CSS::Keyword::Auto&) { |
| 427 | return true; |
| 428 | }, |
| 429 | // FIXME(GCC): Can be removed on Aug 9th, 2026 or later. |
| 430 | #if COMPILER(GCC)(defined WTF_COMPILER_GCC && WTF_COMPILER_GCC) && (__GNUC__4 < 13) |
| 431 | [](auto const&) { |
| 432 | return false; |
| 433 | } |
| 434 | #else |
| 435 | [](CSS::PrimitiveKeyword auto const&) { |
| 436 | return false; |
| 437 | } |
| 438 | #endif |
| 439 | ); |
| 440 | }; |
| 441 | |
| 442 | if (logicalHeight() > 0 || isRenderTable() || borderAndPaddingLogicalHeight() || minHeightIsPositive()) |
| 443 | return false; |
| 444 | |
| 445 | if (heightIsZeroOrAuto()) { |
| 446 | // If the height is 0 or auto, then whether or not we are a self-collapsing block depends |
| 447 | // on whether we have content that is all self-collapsing or not. |
| 448 | return !createsNewFormattingContext() && !childrenPreventSelfCollapsing(); |
| 449 | } |
| 450 | |
| 451 | return false; |
| 452 | } |
| 453 | |
| 454 | void RenderBlock::beginUpdateScrollInfoAfterLayoutTransaction() |
| 455 | { |
| 456 | ++view().frameView().layoutContext().updateScrollInfoAfterLayoutTransaction().nestedCount; |
| 457 | } |
| 458 | |
| 459 | void RenderBlock::endAndCommitUpdateScrollInfoAfterLayoutTransaction() |
| 460 | { |
| 461 | auto* transaction = view().frameView().layoutContext().updateScrollInfoAfterLayoutTransactionIfExists(); |
| 462 | ASSERT(transaction)((void)0); |
| 463 | if (--transaction->nestedCount) |
| 464 | return; |
| 465 | |
| 466 | // Calling RenderLayer::updateScrollInfoAfterLayout() may cause its associated block to layout again and |
| 467 | // updates its scroll info (i.e. call RenderBlock::updateScrollInfoAfterLayout()). We decrement the nestedCount first |
| 468 | // so that all subsequent calls to RenderBlock::updateScrollInfoAfterLayout() are dispatched immediately. |
| 469 | // That is, to ensure that such subsequent calls aren't added to |transaction| while we are processing it. |
| 470 | auto blocksToUpdate = copyToVector(transaction->blocks); |
| 471 | transaction->blocks.clear(); |
| 472 | |
| 473 | for (auto block : blocksToUpdate) { |
| 474 | if (block->hasControlClip() && block->hasRenderOverflow()) |
| 475 | block->clearLayoutOverflow(); |
| 476 | if (block->hasNonVisibleOverflow()) |
| 477 | block->layer()->updateScrollInfoAfterLayout(); |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | static inline bool NODELETE[[clang::annotate_type("webkit.nodelete")]] isDelayingUpdateScrollInfoAfterLayout(const RenderBlock& renderer) |
| 482 | { |
| 483 | auto* transaction = renderer.view().frameView().layoutContext().updateScrollInfoAfterLayoutTransactionIfExists(); |
A function 'isDelayingUpdateScrollInfoAfterLayout' has [[clang::annotate_type("webkit.nodelete")]] but it contains code that could destruct an object | |
| 484 | // FIXME: https://bugs.webkit.org/show_bug.cgi?id=97937 |
| 485 | // Workaround for now. We cannot delay the scroll info for overflow |
| 486 | // for items with opposite writing directions, as the contents needs |
| 487 | // to overflow in that direction |
| 488 | return transaction && transaction->nestedCount && !renderer.writingMode().isBlockFlipped(); |
| 489 | }; |
| 490 | |
| 491 | void RenderBlock::updateScrollInfoAfterLayout() |
| 492 | { |
| 493 | auto hasNonVisibleOverflow = this->hasNonVisibleOverflow(); |
| 494 | |
| 495 | if (isDelayingUpdateScrollInfoAfterLayout(*this)) { |
| 496 | auto shouldUpdate = hasNonVisibleOverflow || hasControlClip(); |
| 497 | if (shouldUpdate) { |
| 498 | view().frameView().layoutContext().updateScrollInfoAfterLayoutTransactionIfExists()->blocks.add(*this); |
| 499 | return; |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | if (hasNonVisibleOverflow && layer()) |
| 504 | layer()->updateScrollInfoAfterLayout(); |
| 505 | } |
| 506 | |
| 507 | void RenderBlock::layout() |
| 508 | { |
| 509 | StackStats::LayoutCheckPoint layoutCheckPoint; |
| 510 | |
| 511 | // Table cells call layoutBlock directly, so don't add any logic here. Put code into layoutBlock(). |
| 512 | { |
| 513 | auto scope = LayoutScope { *this }; |
| 514 | layoutBlock(RelayoutChildren::No); |
| 515 | } |
| 516 | |
| 517 | // It's safe to check for control clip here, since controls can never be table cells. |
| 518 | // If we have a lightweight clip, there can never be any overflow from children. |
| 519 | if (hasControlClip() && m_overflow && !isDelayingUpdateScrollInfoAfterLayout(*this)) |
| 520 | clearLayoutOverflow(); |
| 521 | |
| 522 | invalidateBackgroundObscurationStatus(); |
| 523 | } |
| 524 | |
| 525 | RenderBlockRareData* RenderBlock::blockRareData() const |
| 526 | { |
| 527 | if (!renderBlockHasRareData()) |
| 528 | return nullptr; |
| 529 | ASSERT(gRareDataMap)((void)0); |
| 530 | return gRareDataMap->get(*this); |
| 531 | } |
| 532 | |
| 533 | RenderBlockRareData& RenderBlock::ensureBlockRareData() |
| 534 | { |
| 535 | if (!gRareDataMap) |
| 536 | gRareDataMap = new RenderBlockRareDataMap; |
| 537 | |
| 538 | return *gRareDataMap->ensure(*this, [this] { |
| 539 | setRenderBlockHasRareData(true); |
| 540 | return makeUnique<RenderBlockRareData>(); |
| 541 | }).iterator->value; |
| 542 | } |
| 543 | |
| 544 | void RenderBlock::preparePaginationBeforeBlockLayout(RelayoutChildren& relayoutChildren) |
| 545 | { |
| 546 | // Fragments changing widths can force us to relayout our children. |
| 547 | if (CheckedPtr fragmentedFlow = enclosingFragmentedFlow()) |
| 548 | fragmentedFlow->logicalWidthChangedInFragmentsForBlock(*this, relayoutChildren); |
| 549 | } |
| 550 | |
| 551 | bool RenderBlock::recomputeLogicalWidth() |
| 552 | { |
| 553 | LayoutUnit oldWidth = logicalWidth(); |
| 554 | |
| 555 | updateLogicalWidth(); |
| 556 | |
| 557 | bool hasBorderOrPaddingLogicalWidthChanged = this->hasBorderOrPaddingLogicalWidthChanged(); |
| 558 | setShouldForceRelayoutChildren(false); |
| 559 | |
| 560 | return oldWidth != logicalWidth() || hasBorderOrPaddingLogicalWidthChanged; |
| 561 | } |
| 562 | |
| 563 | void RenderBlock::layoutBlock(RelayoutChildren, LayoutUnit) |
| 564 | { |
| 565 | ASSERT_NOT_REACHED()((void)0); |
| 566 | } |
| 567 | |
| 568 | // Overflow is always relative to the border-box of the element in question. |
| 569 | // Therefore, if the element has a vertical scrollbar placed on the left, an overflow rect at x=2px would conceptually intersect the scrollbar. |
| 570 | void RenderBlock::computeInFlowOverflow(LayoutRect contentArea, OptionSet<ComputeOverflowOptions> options) |
| 571 | { |
| 572 | clearOverflow(); |
| 573 | addOverflowFromInFlowChildren(options); |
| 574 | |
| 575 | if (hasPotentiallyScrollableOverflow() || isRenderView()) { |
| 576 | if (!flippedContentBoxRect().contains(contentArea)) |
| 577 | ensureOverflow(); |
| 578 | if (hasRenderOverflow()) { |
| 579 | m_overflow->addContentOverflow(contentArea); |
| 580 | addLayoutOverflow(scrollablePaddingAreaOverflowRect()); |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | // Add visual overflow from box-shadow, border-image-outset and outline. |
| 585 | addVisualEffectOverflow(); |
| 586 | |
| 587 | // Add visual overflow from theme. |
| 588 | addVisualOverflowFromTheme(); |
| 589 | } |
| 590 | |
| 591 | void RenderBlock::clearLayoutOverflow() |
| 592 | { |
| 593 | if (!m_overflow) |
| 594 | return; |
| 595 | |
| 596 | if (visualOverflowRect() == borderBoxRect()) { |
| 597 | // FIXME: Implement complete solution for fragments overflow. |
| 598 | clearOverflow(); |
| 599 | return; |
| 600 | } |
| 601 | |
| 602 | m_overflow->setLayoutOverflow(borderBoxRect()); |
| 603 | m_overflow->setContentArea(flippedContentBoxRect()); |
| 604 | } |
| 605 | |
| 606 | void RenderBlock::addOverflowFromOutOfFlowBoxes() |
| 607 | { |
| 608 | TrackedRendererListHashSet* outOfFlowDescendants = outOfFlowBoxes(); |
| 609 | if (!outOfFlowDescendants) |
| 610 | return; |
| 611 | |
| 612 | for (auto& outOfFlowBox : *outOfFlowDescendants) { |
| 613 | // Fixed positioned elements don't contribute to layout overflow, since they don't scroll with the content. |
| 614 | if (outOfFlowBox.isAbsolutelyPositioned()) |
| 615 | addOverflowFromContainedBox(outOfFlowBox); |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | void RenderBlock::addVisualOverflowFromTheme() |
| 620 | { |
| 621 | if (!style().hasUsedAppearance()) |
| 622 | return; |
| 623 | |
| 624 | FloatRect inflatedRect = borderBoxRect(); |
| 625 | theme().adjustRepaintRect(*this, inflatedRect); |
| 626 | addVisualOverflow(snappedIntRect(LayoutRect(inflatedRect))); |
| 627 | |
| 628 | if (CheckedPtr fragmentedFlow = enclosingFragmentedFlow()) |
| 629 | fragmentedFlow->addFragmentsVisualOverflowFromTheme(*this); |
| 630 | } |
| 631 | |
| 632 | void RenderBlock::setLogicalLeftForChild(RenderBox& child, LayoutUnit logicalLeft, ApplyLayoutDeltaMode applyDelta) |
| 633 | { |
| 634 | if (isHorizontalWritingMode()) { |
| 635 | if (applyDelta == ApplyLayoutDelta) |
| 636 | view().frameView().layoutContext().addLayoutDelta(LayoutSize(child.x() - logicalLeft, 0_lu)); |
| 637 | child.setX(logicalLeft); |
| 638 | } else { |
| 639 | if (applyDelta == ApplyLayoutDelta) |
| 640 | view().frameView().layoutContext().addLayoutDelta(LayoutSize(0_lu, child.y() - logicalLeft)); |
| 641 | child.setY(logicalLeft); |
| 642 | } |
| 643 | } |
| 644 | |
| 645 | void RenderBlock::setLogicalTopForChild(RenderBox& child, LayoutUnit logicalTop, ApplyLayoutDeltaMode applyDelta) |
| 646 | { |
| 647 | if (isHorizontalWritingMode()) { |
| 648 | if (applyDelta == ApplyLayoutDelta) |
| 649 | view().frameView().layoutContext().addLayoutDelta(LayoutSize(0_lu, child.y() - logicalTop)); |
| 650 | child.setY(logicalTop); |
| 651 | } else { |
| 652 | if (applyDelta == ApplyLayoutDelta) |
| 653 | view().frameView().layoutContext().addLayoutDelta(LayoutSize(child.x() - logicalTop, 0_lu)); |
| 654 | child.setX(logicalTop); |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | void RenderBlock::updateBlockChildDirtyBitsBeforeLayout(RelayoutChildren relayoutChildren, RenderBox& child) |
| 659 | { |
| 660 | if (child.isOutOfFlowPositioned()) |
| 661 | return; |
| 662 | |
| 663 | // FIXME: Technically percentage height objects only need a relayout if their percentage isn't going to be turned into |
| 664 | // an auto value. Add a method to determine this, so that we can avoid the relayout. |
| 665 | auto childHasRelativeHeight = [&] { |
| 666 | auto& style = child.style(); |
| 667 | return style.height().isPercentOrCalculated() || style.minHeight().isPercentOrCalculated() || style.maxHeight().isPercentOrCalculated(); |
| 668 | }; |
| 669 | if (relayoutChildren == RelayoutChildren::Yes || (childHasRelativeHeight() && !isRenderView())) |
| 670 | child.setChildNeedsLayout(MarkOnlyThis); |
| 671 | |
| 672 | // If relayoutChildren is set and the child has percentage padding or an embedded content box, we also need to invalidate the childs pref widths. |
| 673 | if (relayoutChildren == RelayoutChildren::Yes && child.shouldInvalidatePreferredWidths()) |
| 674 | child.setNeedsPreferredWidthsUpdate(MarkOnlyThis); |
| 675 | } |
| 676 | |
| 677 | void RenderBlock::simplifiedNormalFlowLayout() |
| 678 | { |
| 679 | ASSERT(!childrenInline())((void)0); |
| 680 | |
| 681 | for (auto& box : childrenOfType<RenderBox>(*this)) { |
| 682 | if (!box.isOutOfFlowPositioned()) |
| 683 | box.layoutIfNeeded(); |
| 684 | } |
| 685 | } |
| 686 | |
| 687 | bool RenderBlock::canPerformSimplifiedLayout() const |
| 688 | { |
| 689 | if (selfNeedsLayout() || normalChildNeedsLayout() || outOfFlowChildNeedsStaticPositionLayout()) |
| 690 | return false; |
| 691 | if (auto wasSkippedDuringLastLayout = wasSkippedDuringLastLayoutDueToContentVisibility(); wasSkippedDuringLastLayout && *wasSkippedDuringLastLayout) |
| 692 | return false; |
| 693 | if (layoutContext().isSkippedContentRootForLayout(*this) && (outOfFlowChildNeedsLayout() || canContainFixedPositionObjects())) |
| 694 | return false; |
| 695 | if (isSkippedContentRoot(*this) && firstChild() && firstChild()->wasSkippedDuringLastLayoutDueToContentVisibility()) |
| 696 | return false; |
| 697 | return outOfFlowChildNeedsLayout() || needsSimplifiedNormalFlowLayout(); |
| 698 | } |
| 699 | |
| 700 | bool RenderBlock::simplifiedLayout() |
| 701 | { |
| 702 | if (!canPerformSimplifiedLayout()) |
| 703 | return false; |
| 704 | |
| 705 | LayoutStateMaintainer statePusher(*this, locationOffset(), isTransformed() || hasReflection() || writingMode().isBlockFlipped()); |
| 706 | if (needsOutOfFlowMovementLayout() && !tryLayoutDoingOutOfFlowMovementOnly()) |
| 707 | return false; |
| 708 | |
| 709 | // Lay out positioned descendants or objects that just need to recompute overflow. |
| 710 | if (needsSimplifiedNormalFlowLayout()) |
| 711 | simplifiedNormalFlowLayout(); |
| 712 | |
| 713 | // Make sure a forced break is applied after the content if we are a flow thread in a simplified layout. |
| 714 | // This ensures the size information is correctly computed for the last auto-height fragment receiving content. |
| 715 | if (CheckedPtr fragmentedFlow = dynamicDowncast<RenderFragmentedFlow>(*this)) |
| 716 | fragmentedFlow->applyBreakAfterContent(clientLogicalBottom()); |
| 717 | |
| 718 | // Recompute our overflow information. |
| 719 | // FIXME: Skip recalculation if we didn't actually relayout our in-flow boxes and don't have cached overflow. |
| 720 | auto contentArea = hasRenderOverflow() ? m_overflow->contentArea() : flippedContentBoxRect(); |
| 721 | computeInFlowOverflow(contentArea, ComputeOverflowOptions::RecomputeFloats); |
| 722 | |
| 723 | // Lay out our positioned objects if our positioned child bit is set. |
| 724 | // Also, if an absolute position element inside a relative positioned container moves, and the absolute element has a fixed position |
| 725 | // child, neither the fixed element nor its container learn of the movement since outOfFlowChildNeedsLayout() is only marked as far as the |
| 726 | // relative positioned container. So if we can have fixed pos objects in our positioned objects list check if any of them |
| 727 | // are statically positioned and thus need to move with their absolute ancestors. |
| 728 | bool canContainFixedPosObjects = canContainFixedPositionObjects(); |
| 729 | if (outOfFlowChildNeedsLayout() || canContainFixedPosObjects) |
| 730 | layoutOutOfFlowBoxes(RelayoutChildren::No, !outOfFlowChildNeedsLayout() && canContainFixedPosObjects); |
| 731 | addOverflowFromOutOfFlowBoxes(); |
| 732 | |
| 733 | updateLayerTransform(); |
| 734 | |
| 735 | updateScrollInfoAfterLayout(); |
| 736 | |
| 737 | clearNeedsLayout(); |
| 738 | return true; |
| 739 | } |
| 740 | |
| 741 | void RenderBlock::markFixedPositionBoxForLayoutIfNeeded(RenderBox& positionedChild) |
| 742 | { |
| 743 | if (positionedChild.style().position() != PositionType::Fixed) |
| 744 | return; |
| 745 | |
| 746 | bool hasStaticBlockPosition = positionedChild.style().hasStaticBlockPosition(isHorizontalWritingMode()); |
| 747 | bool hasStaticInlinePosition = positionedChild.style().hasStaticInlinePosition(isHorizontalWritingMode()); |
| 748 | if (!hasStaticBlockPosition && !hasStaticInlinePosition) |
| 749 | return; |
| 750 | |
| 751 | auto* parent = positionedChild.parent(); |
| 752 | while (parent && !is<RenderView>(*parent) && parent->style().position() != PositionType::Absolute) |
| 753 | parent = parent->parent(); |
| 754 | if (!parent || parent->style().position() != PositionType::Absolute) |
| 755 | return; |
| 756 | |
| 757 | if (hasStaticInlinePosition) { |
| 758 | LogicalExtentComputedValues computedValues; |
| 759 | positionedChild.computeLogicalWidth(computedValues); |
| 760 | LayoutUnit newLeft = computedValues.position; |
| 761 | if (newLeft != positionedChild.logicalLeft()) |
| 762 | positionedChild.setChildNeedsLayout(MarkOnlyThis); |
| 763 | } else if (hasStaticBlockPosition) { |
| 764 | auto logicalTop = positionedChild.logicalTop(); |
| 765 | if (logicalTop != positionedChild.computeLogicalHeight(positionedChild.logicalHeight(), logicalTop).position) |
| 766 | positionedChild.setChildNeedsLayout(MarkOnlyThis); |
| 767 | } |
| 768 | } |
| 769 | |
| 770 | LayoutUnit RenderBlock::marginIntrinsicLogicalWidthForChild(RenderBox& child) const |
| 771 | { |
| 772 | // A margin has three types: fixed, percentage, and auto (variable). |
| 773 | // Auto and percentage margins become 0 when computing min/max width. |
| 774 | // Fixed margins can be added in as is. |
| 775 | auto& marginLeft = child.style().marginStart(writingMode()); |
| 776 | auto& marginRight = child.style().marginEnd(writingMode()); |
| 777 | const auto& zoomFactor = child.style().usedZoomForLength(); |
| 778 | LayoutUnit margin; |
| 779 | if (auto fixedMarginLeft = marginLeft.tryFixed(); fixedMarginLeft && !shouldTrimChildMargin(Style::MarginTrimSide::InlineStart, child)) |
| 780 | margin += fixedMarginLeft->resolveZoom(zoomFactor); |
| 781 | if (auto fixedMarginRight = marginRight.tryFixed(); fixedMarginRight && !shouldTrimChildMargin(Style::MarginTrimSide::InlineEnd, child)) |
| 782 | margin += fixedMarginRight->resolveZoom(zoomFactor); |
| 783 | return margin; |
| 784 | } |
| 785 | |
| 786 | void RenderBlock::layoutOutOfFlowBox(RenderBox& outOfFlowBox, RelayoutChildren relayoutChildren, bool fixedPositionObjectsOnly) |
| 787 | { |
| 788 | ASSERT(outOfFlowBox.isOutOfFlowPositioned())((void)0); |
| 789 | |
| 790 | if (layoutContext().isSkippedContentRootForLayout(*this)) { |
| 791 | outOfFlowBox.clearNeedsLayoutForSkippedContent(); |
| 792 | return; |
| 793 | } |
| 794 | |
| 795 | estimateFragmentRangeForBoxChild(outOfFlowBox); |
| 796 | |
| 797 | // A fixed position element with an absolute positioned ancestor has no way of knowing if the latter has changed position. So |
| 798 | // if this is a fixed position element, mark it for layout if it has an abspos ancestor and needs to move with that ancestor, i.e. |
| 799 | // it has static position. |
| 800 | markFixedPositionBoxForLayoutIfNeeded(outOfFlowBox); |
| 801 | if (fixedPositionObjectsOnly) { |
| 802 | outOfFlowBox.layoutIfNeeded(); |
| 803 | return; |
| 804 | } |
| 805 | |
| 806 | auto& outOfFlowBoxStyle = outOfFlowBox.style(); |
| 807 | // When a non-positioned block element moves, it may have positioned children that are implicitly positioned relative to the |
| 808 | // non-positioned block. Rather than trying to detect all of these movement cases, we just always lay out positioned |
| 809 | // objects that are positioned implicitly like this. Such objects are rare, and so in typical DHTML menu usage (where everything is |
| 810 | // positioned explicitly) this should not incur a performance penalty. |
| 811 | auto needsLayout = [&] { |
| 812 | if (relayoutChildren == RelayoutChildren::Yes) |
| 813 | return true; |
| 814 | if (outOfFlowBox.parent() == this) |
| 815 | return false; |
| 816 | if (outOfFlowBoxStyle.hasStaticBlockPosition(isHorizontalWritingMode())) |
| 817 | return true; |
| 818 | if (outOfFlowBoxStyle.hasStaticInlinePosition(isHorizontalWritingMode())) { |
| 819 | // FIXME: We could just set the logical left on this out-of-flow box since the box itself does not really need layout (we are just moving an out-of-flow renderer here). |
| 820 | return outOfFlowBox.logicalLeft() != PositionedLayoutConstraints { outOfFlowBox, LogicalBoxAxis::Inline }.computedInlineStaticDistance(); |
| 821 | } |
| 822 | return false; |
| 823 | }; |
| 824 | if (needsLayout()) |
| 825 | outOfFlowBox.setChildNeedsLayout(MarkOnlyThis); |
| 826 | |
| 827 | // If relayoutChildren is set and the child has percentage padding or an embedded content box, we also need to invalidate the childs pref widths. |
| 828 | if (relayoutChildren == RelayoutChildren::Yes && outOfFlowBox.shouldInvalidatePreferredWidths()) |
| 829 | outOfFlowBox.setNeedsPreferredWidthsUpdate(MarkOnlyThis); |
| 830 | |
| 831 | outOfFlowBox.markForPaginationRelayoutIfNeeded(); |
| 832 | |
| 833 | // We don't have to do a full layout. We just have to update our position. Try that first. If we have shrink-to-fit width |
| 834 | // and we hit the available width constraint, the layoutIfNeeded() will catch it and do a full layout. |
| 835 | if (outOfFlowBox.needsOutOfFlowMovementLayoutOnly() && outOfFlowBox.tryLayoutDoingOutOfFlowMovementOnly()) { |
| 836 | if (Style::AnchorPositionEvaluator::isAnchorPositioned(outOfFlowBoxStyle)) |
| 837 | Style::AnchorPositionEvaluator::captureScrollSnapshots(outOfFlowBox); |
| 838 | outOfFlowBox.clearNeedsLayout(); |
| 839 | } |
| 840 | |
| 841 | // If we are paginated or in a line grid, compute a vertical position for our object now. |
| 842 | // If it's wrong we'll lay out again. |
| 843 | LayoutUnit oldLogicalTop; |
| 844 | auto* layoutState = view().frameView().layoutContext().layoutState(); |
| 845 | bool needsBlockDirectionLocationSetBeforeLayout = outOfFlowBox.needsLayout() && layoutState && layoutState->needsBlockDirectionLocationSetBeforeLayout(); |
| 846 | if (needsBlockDirectionLocationSetBeforeLayout) { |
| 847 | if (isHorizontalWritingMode() == outOfFlowBox.isHorizontalWritingMode()) |
| 848 | outOfFlowBox.updateLogicalHeight(); |
| 849 | else |
| 850 | outOfFlowBox.updateLogicalWidth(); |
| 851 | oldLogicalTop = logicalTopForChild(outOfFlowBox); |
| 852 | } |
| 853 | |
| 854 | outOfFlowBox.layoutIfNeeded(); |
| 855 | |
| 856 | auto* parent = outOfFlowBox.parent(); |
| 857 | bool layoutChanged = false; |
| 858 | if (auto* flexibleBox = dynamicDowncast<RenderFlexibleBox>(*parent); flexibleBox && flexibleBox->setStaticPositionForPositionedLayout(outOfFlowBox)) { |
| 859 | // The static position of an abspos child of a flexbox depends on its size |
| 860 | // (for example, they can be centered). So we may have to reposition the |
| 861 | // item after layout. |
| 862 | // FIXME: We could probably avoid a layout here and just reposition? |
| 863 | layoutChanged = true; |
| 864 | } |
| 865 | |
| 866 | // Lay out again if our estimate was wrong. |
| 867 | if (layoutChanged || (needsBlockDirectionLocationSetBeforeLayout && logicalTopForChild(outOfFlowBox) != oldLogicalTop)) { |
| 868 | outOfFlowBox.setChildNeedsLayout(MarkOnlyThis); |
| 869 | outOfFlowBox.layoutIfNeeded(); |
| 870 | } |
| 871 | |
| 872 | if (updateFragmentRangeForBoxChild(outOfFlowBox)) { |
| 873 | outOfFlowBox.setNeedsLayout(MarkOnlyThis); |
| 874 | outOfFlowBox.layoutIfNeeded(); |
| 875 | } |
| 876 | |
| 877 | if (layoutState && layoutState->isPaginated()) { |
| 878 | if (CheckedPtr blockFlow = dynamicDowncast<RenderBlockFlow>(*this)) |
| 879 | blockFlow->adjustSizeContainmentChildForPagination(outOfFlowBox, outOfFlowBox.logicalTop()); |
| 880 | } |
| 881 | } |
| 882 | |
| 883 | void RenderBlock::layoutOutOfFlowBoxes(RelayoutChildren relayoutChildren, bool fixedPositionObjectsOnly) |
| 884 | { |
| 885 | auto* outOfFlowDescendants = outOfFlowBoxes(); |
| 886 | if (!outOfFlowDescendants) |
| 887 | return; |
| 888 | |
| 889 | // Do not cache outOfFlowDescendants->end() in a local variable, since |outOfFlowDescendants| can be mutated |
| 890 | // as it is walked. We always need to fetch the new end() value dynamically. |
| 891 | for (auto& descendant : *outOfFlowDescendants) |
| 892 | layoutOutOfFlowBox(descendant, relayoutChildren, fixedPositionObjectsOnly); |
| 893 | } |
| 894 | |
| 895 | void RenderBlock::markOutOfFlowBoxesForLayout() |
| 896 | { |
| 897 | auto* outOfFlowDescendants = outOfFlowBoxes(); |
| 898 | if (!outOfFlowDescendants) |
| 899 | return; |
| 900 | |
| 901 | for (auto& descendant : *outOfFlowDescendants) |
| 902 | descendant.setChildNeedsLayout(); |
| 903 | } |
| 904 | |
| 905 | void RenderBlock::markForPaginationRelayoutIfNeeded() |
| 906 | { |
| 907 | auto* layoutState = view().frameView().layoutContext().layoutState(); |
| 908 | if (needsLayout() || !layoutState || !layoutState->isPaginated()) |
| 909 | return; |
| 910 | |
| 911 | if (layoutState->pageLogicalHeightChanged() || (layoutState->pageLogicalHeight() && layoutState->pageLogicalOffset(this, logicalTop()) != pageLogicalOffset())) |
| 912 | setChildNeedsLayout(MarkOnlyThis); |
| 913 | } |
| 914 | |
| 915 | void RenderBlock::paintCarets(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| 916 | { |
| 917 | if (paintInfo.phase == PaintPhase::Foreground) { |
| 918 | paintCaret(paintInfo, paintOffset, CursorCaret); |
| 919 | paintCaret(paintInfo, paintOffset, DragCaret); |
| 920 | } |
| 921 | } |
| 922 | |
| 923 | void RenderBlock::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| 924 | { |
| 925 | auto adjustedPaintOffset = paintOffset + location(); |
| 926 | PaintPhase phase = paintInfo.phase; |
| 927 | |
| 928 | // FIXME: Could eliminate the isDocumentElementRenderer() check if we fix background painting so that the RenderView paints the root's background. |
| 929 | auto visualContentIsClippedOut = [&](LayoutRect paintingRect) { |
| 930 | if (isDocumentElementRenderer()) |
| 931 | return false; |
| 932 | |
| 933 | if (paintInfo.paintBehavior.contains(PaintBehavior::CompositedOverflowScrollContent) && hasLayer() && layer()->usesCompositedScrolling()) |
| 934 | return false; |
| 935 | |
| 936 | auto overflowBox = visualOverflowRect(); |
| 937 | flipForWritingMode(overflowBox); |
| 938 | overflowBox.moveBy(adjustedPaintOffset); |
| 939 | return !overflowBox.intersects(paintingRect); |
| 940 | }; |
| 941 | |
| 942 | if (visualContentIsClippedOut(paintInfo.rect)) |
| 943 | return; |
| 944 | |
| 945 | bool pushedClip = pushContentsClip(paintInfo, adjustedPaintOffset); |
| 946 | paintObject(paintInfo, adjustedPaintOffset); |
| 947 | if (pushedClip) |
| 948 | popContentsClip(paintInfo, phase, adjustedPaintOffset); |
| 949 | |
| 950 | // Our scrollbar widgets paint exactly when we tell them to, so that they work properly with |
| 951 | // z-index. We paint after we painted the background/border, so that the scrollbars will |
| 952 | // sit above the background/border. |
| 953 | if (phase == PaintPhase::BlockBackground || phase == PaintPhase::ChildBlockBackground) { |
| 954 | CheckedPtr layer = this->layer(); |
| 955 | if (hasNonVisibleOverflow() && layer && layer->scrollableArea() && style().usedVisibility() == Visibility::Visible |
| 956 | && paintInfo.shouldPaintWithinRoot(*this) && !paintInfo.paintRootBackgroundOnly()) { |
| 957 | protect(layer->scrollableArea())->paintOverflowControls(paintInfo.context(), paintInfo.paintBehavior, roundedIntPoint(adjustedPaintOffset), snappedIntRect(paintInfo.rect)); |
| 958 | } |
| 959 | } |
| 960 | } |
| 961 | |
| 962 | PaintInfo RenderBlock::paintInfoForBlockChildren(const PaintInfo& paintInfo) const |
| 963 | { |
| 964 | auto phaseForChildren = [&] { |
| 965 | switch (paintInfo.phase) { |
| 966 | case PaintPhase::ChildOutlines: |
| 967 | return PaintPhase::Outline; |
| 968 | case PaintPhase::ChildBlockBackgrounds: |
| 969 | return PaintPhase::ChildBlockBackground; |
| 970 | default: |
| 971 | return paintInfo.phase; |
| 972 | } |
| 973 | }; |
| 974 | |
| 975 | PaintInfo paintInfoForChildren(paintInfo); |
| 976 | paintInfoForChildren.phase = phaseForChildren(); |
| 977 | paintInfoForChildren.updateSubtreePaintRootForChildren(this); |
| 978 | |
| 979 | if (paintInfoForChildren.eventRegionContext()) |
| 980 | paintInfoForChildren.paintBehavior.add(PaintBehavior::EventRegionIncludeBackground); |
| 981 | |
| 982 | return paintInfoForChildren; |
| 983 | } |
| 984 | |
| 985 | void RenderBlock::paintContents(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| 986 | { |
| 987 | ASSERT(!isSkippedContentRoot(*this))((void)0); |
| 988 | |
| 989 | if (childrenInline()) |
| 990 | paintInlineChildren(paintInfo, paintOffset); |
| 991 | else { |
| 992 | PaintInfo paintInfoForChildred = paintInfoForBlockChildren(paintInfo); |
| 993 | |
| 994 | // FIXME: Paint-time pagination is obsolete and is now only used by embedded WebViews inside AppKit |
| 995 | // NSViews. Do not add any more code for this. |
| 996 | bool usePrintRect = !view().printRect().isEmpty(); |
| 997 | paintChildren(paintInfo, paintOffset, paintInfoForChildred, usePrintRect); |
| 998 | } |
| 999 | } |
| 1000 | |
| 1001 | void RenderBlock::paintChildren(PaintInfo& paintInfo, const LayoutPoint& paintOffset, PaintInfo& paintInfoForChild, bool usePrintRect) |
| 1002 | { |
| 1003 | ASSERT(!isSkippedContentRoot(*this))((void)0); |
| 1004 | |
| 1005 | for (auto& child : childrenOfType<RenderBox>(*this)) { |
| 1006 | if (!paintChild(child, paintInfo, paintOffset, paintInfoForChild, usePrintRect)) |
| 1007 | return; |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | bool RenderBlock::paintChild(RenderBox& child, PaintInfo& paintInfo, const LayoutPoint& paintOffset, PaintInfo& paintInfoForChild, bool usePrintRect, PaintBlockType paintType) |
| 1012 | { |
| 1013 | ASSERT(!isSkippedContentRoot(*this))((void)0); |
| 1014 | |
| 1015 | if (child.isExcludedAndPlacedInBorder()) |
| 1016 | return true; |
| 1017 | |
| 1018 | if (child.isSkippedContent()) { |
| 1019 | ASSERT(child.isColumnSpanner())((void)0); |
| 1020 | return true; |
| 1021 | } |
| 1022 | |
| 1023 | // Check for page-break-before: always, and if it's set, break and bail. |
| 1024 | bool checkBeforeAlways = !childrenInline() && (usePrintRect && alwaysPageBreak(child.style().breakBefore())); |
| 1025 | LayoutUnit absoluteChildY = paintOffset.y() + child.y(); |
| 1026 | if (checkBeforeAlways |
| 1027 | && absoluteChildY > paintInfo.rect.y() |
| 1028 | && absoluteChildY < paintInfo.rect.maxY()) { |
| 1029 | view().setBestTruncatedAt(absoluteChildY, this, true); |
| 1030 | return false; |
| 1031 | } |
| 1032 | |
| 1033 | if (!child.isFloating() && child.isBlockLevelReplacedOrAtomicInline() && usePrintRect && child.height() <= view().printRect().height()) { |
| 1034 | // Paginate block-level replaced elements. |
| 1035 | if (absoluteChildY + child.height() > view().printRect().maxY()) { |
| 1036 | if (absoluteChildY < view().truncatedAt()) |
| 1037 | view().setBestTruncatedAt(absoluteChildY, &child); |
| 1038 | // If we were able to truncate, don't paint. |
| 1039 | if (absoluteChildY >= view().truncatedAt()) |
| 1040 | return false; |
| 1041 | } |
| 1042 | } |
| 1043 | |
| 1044 | LayoutPoint childPoint = flipForWritingModeForChild(child, paintOffset); |
| 1045 | if (!child.hasSelfPaintingLayer() && !child.isFloating()) { |
| 1046 | if (paintType == PaintAsInlineBlock) |
| 1047 | child.paintAsInlineBlock(paintInfoForChild, childPoint); |
| 1048 | else |
| 1049 | child.paint(paintInfoForChild, childPoint); |
| 1050 | } |
| 1051 | |
| 1052 | // Check for page-break-after: always, and if it's set, break and bail. |
| 1053 | bool checkAfterAlways = !childrenInline() && (usePrintRect && alwaysPageBreak(child.style().breakAfter())); |
| 1054 | if (checkAfterAlways |
| 1055 | && (absoluteChildY + child.height()) > paintInfo.rect.y() |
| 1056 | && (absoluteChildY + child.height()) < paintInfo.rect.maxY()) { |
| 1057 | view().setBestTruncatedAt(absoluteChildY + child.height() + std::max<LayoutUnit>(0, child.collapsedMarginAfter()), this, true); |
| 1058 | return false; |
| 1059 | } |
| 1060 | |
| 1061 | return true; |
| 1062 | } |
| 1063 | |
| 1064 | void RenderBlock::paintCaret(PaintInfo& paintInfo, const LayoutPoint& paintOffset, CaretType type) |
| 1065 | { |
| 1066 | auto shouldPaintCaret = [&](RenderBlock* caretPainter, bool isContentEditable) { |
| 1067 | if (caretPainter != this) |
| 1068 | return false; |
| 1069 | |
| 1070 | return isContentEditable || settings().caretBrowsingEnabled(); |
| 1071 | }; |
| 1072 | |
| 1073 | switch (type) { |
| 1074 | case CaretType::CursorCaret: { |
| 1075 | auto caretPainter = frame().selection().caretRendererWithoutUpdatingLayout(); |
| 1076 | if (!caretPainter) |
| 1077 | return; |
| 1078 | |
| 1079 | bool isContentEditable = frame().selection().selection().hasEditableStyle(); |
| 1080 | |
| 1081 | if (shouldPaintCaret(caretPainter, isContentEditable)) |
| 1082 | frame().selection().paintCaret(paintInfo.context(), paintOffset); |
| 1083 | break; |
| 1084 | } |
| 1085 | case CaretType::DragCaret: { |
| 1086 | auto caretPainter = page().dragCaretController().caretRenderer(); |
| 1087 | if (!caretPainter) |
| 1088 | return; |
| 1089 | |
| 1090 | bool isContentEditable = page().dragCaretController().isContentEditable(); |
| 1091 | if (shouldPaintCaret(caretPainter, isContentEditable)) |
| 1092 | page().dragCaretController().paintDragCaret(protect(frame()).ptr(), paintInfo.context(), paintOffset); |
| 1093 | |
| 1094 | break; |
| 1095 | } |
| 1096 | } |
| 1097 | } |
| 1098 | |
| 1099 | void RenderBlock::paintDebugBoxShadowIfApplicable(GraphicsContext& context, const LayoutRect& paintRect) const |
| 1100 | { |
| 1101 | // FIXME: Use a more generic, modern-layout wide setting instead. |
| 1102 | if (!settings().legacyLineLayoutVisualCoverageEnabled()) |
| 1103 | return; |
| 1104 | |
| 1105 | auto* flexBox = dynamicDowncast<RenderFlexibleBox>(this); |
| 1106 | if (!flexBox) |
| 1107 | return; |
| 1108 | |
| 1109 | constexpr size_t shadowExtent = 3; |
| 1110 | GraphicsContextStateSaver stateSaver(context); |
| 1111 | |
| 1112 | auto shadowRect = paintRect; |
| 1113 | shadowRect.inflate(shadowExtent); |
| 1114 | context.clip(shadowRect); |
| 1115 | context.setDropShadow({ { -shadowRect.width(), 0 }, 30, flexBox->hasModernLayout() ? SRGBA<uint8_t> { 0, 180, 230, 200 } : SRGBA<uint8_t> { 200, 100, 100, 200 }, ShadowRadiusMode::Default }); |
| 1116 | context.clipOut(paintRect); |
| 1117 | shadowRect.move(shadowRect.width(), 0); |
| 1118 | context.fillRect(shadowRect, Color::black); |
| 1119 | } |
| 1120 | |
| 1121 | void RenderBlock::paintObject(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| 1122 | { |
| 1123 | PaintPhase paintPhase = paintInfo.phase; |
| 1124 | auto shouldPaintContent = !isSkippedContentRoot(*this); |
| 1125 | |
| 1126 | // 1. paint background, borders etc |
| 1127 | if ((paintPhase == PaintPhase::BlockBackground || paintPhase == PaintPhase::ChildBlockBackground) && style().usedVisibility() == Visibility::Visible) { |
| 1128 | if (hasVisibleBoxDecorations()) |
| 1129 | paintBoxDecorations(paintInfo, paintOffset); |
| 1130 | paintDebugBoxShadowIfApplicable(paintInfo.context(), { paintOffset, size() }); |
| 1131 | } |
| 1132 | |
| 1133 | // Paint legends just above the border before we scroll or clip. |
| 1134 | if (shouldPaintContent && (paintPhase == PaintPhase::BlockBackground || paintPhase == PaintPhase::ChildBlockBackground || paintPhase == PaintPhase::Selection)) |
| 1135 | paintExcludedChildrenInBorder(paintInfo, paintOffset); |
| 1136 | |
| 1137 | if (paintPhase == PaintPhase::Mask && style().usedVisibility() == Visibility::Visible) { |
| 1138 | paintMask(paintInfo, paintOffset); |
| 1139 | return; |
| 1140 | } |
| 1141 | |
| 1142 | if (paintPhase == PaintPhase::ClippingMask && style().usedVisibility() == Visibility::Visible) { |
| 1143 | paintClippingMask(paintInfo, paintOffset); |
| 1144 | return; |
| 1145 | } |
| 1146 | |
| 1147 | // If just painting the root background, then return. |
| 1148 | if (paintInfo.paintRootBackgroundOnly()) |
| 1149 | return; |
| 1150 | |
| 1151 | if (paintPhase == PaintPhase::Accessibility) |
| 1152 | paintInfo.accessibilityRegionContext()->takeBounds(*this, paintOffset); |
| 1153 | |
| 1154 | if (paintPhase == PaintPhase::EventRegion) { |
| 1155 | auto borderRect = LayoutRect(paintOffset, size()); |
| 1156 | |
| 1157 | Ref document = this->document(); |
| 1158 | if (paintInfo.paintBehavior.contains(PaintBehavior::EventRegionIncludeBackground) && visibleToHitTesting()) { |
| 1159 | auto borderShape = BorderShape::shapeForBorderRect(style(), borderRect); |
| 1160 | LOG_WITH_STREAM(EventRegions, stream << "RenderBlock " << *this << " uniting region " << borderShape.deprecatedRoundedRect() << " event listener types " << style().eventListenerRegionTypes())((void)0); |
| 1161 | bool overrideUserModifyIsEditable = isRenderTextControl() && protect(downcast<RenderTextControl>(*this).textFormControlElement())->isInnerTextElementEditable(); |
| 1162 | paintInfo.eventRegionContext()->unite(borderShape.deprecatedPixelSnappedRoundedRect(document->deviceScaleFactor()), *this, style(), overrideUserModifyIsEditable); |
| 1163 | } |
| 1164 | |
| 1165 | if (!paintInfo.paintBehavior.contains(PaintBehavior::EventRegionIncludeForeground)) |
| 1166 | return; |
| 1167 | |
| 1168 | bool needsTraverseDescendants = hasVisualOverflow() || containsFloats() || !paintInfo.eventRegionContext()->contains(enclosingIntRect(borderRect)) || view().needsEventRegionUpdateForNonCompositedFrame(); |
| 1169 | LOG_WITH_STREAM(EventRegions, stream << "RenderBlock " << *this << " needsTraverseDescendants for event region: hasVisualOverflow: " << hasVisualOverflow() << " containsFloats: "((void)0) |
| 1170 | << containsFloats() << " border box is outside current region: " << !paintInfo.eventRegionContext()->contains(enclosingIntRect(borderRect)) << " needsEventRegionUpdateForNonCompositedFrame:" << view().needsEventRegionUpdateForNonCompositedFrame())((void)0); |
| 1171 | #if ENABLE(TOUCH_ACTION_REGIONS)(defined 1 && 1) |
| 1172 | needsTraverseDescendants |= document->mayHaveElementsWithNonAutoTouchAction(); |
| 1173 | LOG_WITH_STREAM(EventRegions, stream << " may have touch-action elements: " << document->mayHaveElementsWithNonAutoTouchAction())((void)0); |
| 1174 | #endif |
| 1175 | #if ENABLE(WHEEL_EVENT_REGIONS)(defined 1 && 1) |
| 1176 | needsTraverseDescendants |= document->hasWheelEventHandlers(); |
| 1177 | LOG_WITH_STREAM(EventRegions, stream << " has wheel event handlers: " << document->hasWheelEventHandlers())((void)0); |
| 1178 | #endif |
| 1179 | #if ENABLE(TOUCH_EVENT_REGIONS)(defined 0 && 0) |
| 1180 | needsTraverseDescendants |= document->hasTouchEventHandlers(); |
| 1181 | LOG_WITH_STREAM(EventRegions, stream << " has touch event handlers: " << document->hasTouchEventHandlers())((void)0); |
| 1182 | #endif |
| 1183 | |
| 1184 | #if ENABLE(EDITABLE_REGION)(defined 1 && 1) |
| 1185 | // We treat the entire text control as editable to match users' expectation even |
| 1186 | // though it's actually the inner text element of the control that is editable. |
| 1187 | // So, no need to traverse to find the inner text element in this case. |
| 1188 | if (!isRenderTextControl()) { |
| 1189 | needsTraverseDescendants |= document->mayHaveEditableElements() && page().shouldBuildEditableRegion(); |
| 1190 | LOG_WITH_STREAM(EventRegions, stream << " needs editable event region: " << (document->mayHaveEditableElements() && page().shouldBuildEditableRegion()))((void)0); |
| 1191 | } |
| 1192 | #endif |
| 1193 | |
| 1194 | #if ENABLE(INTERACTION_REGIONS_IN_EVENT_REGION)(defined ENABLE_INTERACTION_REGIONS_IN_EVENT_REGION && ENABLE_INTERACTION_REGIONS_IN_EVENT_REGION) |
| 1195 | needsTraverseDescendants |= page().shouldBuildInteractionRegions(); |
| 1196 | #endif |
| 1197 | |
| 1198 | if (!needsTraverseDescendants) |
| 1199 | return; |
| 1200 | } |
| 1201 | |
| 1202 | // Adjust our painting position if we're inside a scrolled layer (e.g., an overflow:auto div). |
| 1203 | LayoutPoint scrolledOffset = paintOffset; |
| 1204 | scrolledOffset.moveBy(-scrollPosition()); |
| 1205 | |
| 1206 | // Column rules need to account for scrolling and clipping. |
| 1207 | // FIXME: Clipping of column rules does not work. We will need a separate paint phase for column rules I suspect in order to get |
| 1208 | // clipping correct (since it has to paint as background but is still considered "contents"). |
| 1209 | if ((paintPhase == PaintPhase::BlockBackground || paintPhase == PaintPhase::ChildBlockBackground) && style().usedVisibility() == Visibility::Visible) |
| 1210 | paintColumnRules(paintInfo, scrolledOffset); |
| 1211 | |
| 1212 | // Done with backgrounds, borders and column rules. |
| 1213 | if (paintPhase == PaintPhase::BlockBackground) |
| 1214 | return; |
| 1215 | |
| 1216 | // 2. paint contents |
| 1217 | if (shouldPaintContent) { |
| 1218 | if (paintPhase != PaintPhase::SelfOutline) |
| 1219 | paintContents(paintInfo, scrolledOffset); |
| 1220 | } |
| 1221 | |
| 1222 | // 3. paint selection |
| 1223 | if (!protect(document())->printing()) { |
| 1224 | // Fill in gaps in selection on lines, between blocks and "empty space" when content is skipped. |
| 1225 | paintSelection(paintInfo, scrolledOffset); |
| 1226 | } |
| 1227 | |
| 1228 | if (shouldPaintContent) { |
| 1229 | // 4. paint floats. |
| 1230 | if (paintPhase == PaintPhase::Float || paintPhase == PaintPhase::Selection || paintPhase == PaintPhase::TextClip || paintPhase == PaintPhase::EventRegion || paintPhase == PaintPhase::Accessibility) |
| 1231 | paintFloats(paintInfo, scrolledOffset, paintPhase == PaintPhase::Selection || paintPhase == PaintPhase::TextClip || paintPhase == PaintPhase::EventRegion || paintPhase == PaintPhase::Accessibility); |
| 1232 | } |
| 1233 | |
| 1234 | // 5. paint outline. |
| 1235 | if ((paintPhase == PaintPhase::Outline || paintPhase == PaintPhase::SelfOutline) && hasOutline() && style().usedVisibility() == Visibility::Visible) { |
| 1236 | // Don't paint focus ring for anonymous block continuation because the |
| 1237 | // inline element having outline-style:auto paints the whole focus ring. |
| 1238 | if (style().outlineStyle() != OutlineStyle::Auto || !isContinuation()) |
| 1239 | paintOutline(paintInfo, LayoutRect(paintOffset, size())); |
| 1240 | } |
| 1241 | |
| 1242 | // 6. paint continuation outlines. |
| 1243 | if ((paintPhase == PaintPhase::Outline || paintPhase == PaintPhase::ChildOutlines)) { |
| 1244 | RenderInline* inlineCont = inlineContinuation(); |
| 1245 | if (inlineCont && inlineCont->hasOutline() && inlineCont->style().usedVisibility() == Visibility::Visible) { |
| 1246 | RenderInline* inlineRenderer = downcast<RenderInline>(inlineCont->element()->renderer()); |
| 1247 | RenderBlock* containingBlock = this->containingBlock(); |
| 1248 | |
| 1249 | bool inlineEnclosedInSelfPaintingLayer = false; |
| 1250 | for (RenderBoxModelObject* box = inlineRenderer; box != containingBlock; box = &box->parent()->enclosingBoxModelObject()) { |
| 1251 | if (box->hasSelfPaintingLayer()) { |
| 1252 | inlineEnclosedInSelfPaintingLayer = true; |
| 1253 | break; |
| 1254 | } |
| 1255 | } |
| 1256 | |
| 1257 | // Do not add continuations for outline painting by our containing block if we are a relative positioned |
| 1258 | // anonymous block (i.e. have our own layer), paint them straightaway instead. This is because a block depends on renderers in its continuation table being |
| 1259 | // in the same layer. |
| 1260 | if (!inlineEnclosedInSelfPaintingLayer && !hasLayer()) |
| 1261 | containingBlock->addContinuationWithOutline(inlineRenderer); |
| 1262 | else if (!InlineIterator::lineLeftmostInlineBoxFor(*inlineRenderer) || (!inlineEnclosedInSelfPaintingLayer && hasLayer())) { |
| 1263 | auto outlineOffset = paintOffset - locationOffset() + inlineRenderer->containingBlock()->location(); |
| 1264 | OutlinePainter { paintInfo }.paintOutline(*inlineRenderer, outlineOffset); |
| 1265 | } |
| 1266 | } |
| 1267 | paintContinuationOutlines(paintInfo, paintOffset); |
| 1268 | } |
| 1269 | |
| 1270 | // 7. paint caret. |
| 1271 | // If the caret's node's render object's containing block is this block, and the paint action is PaintPhase::Foreground, |
| 1272 | // then paint the caret. |
| 1273 | if (shouldPaintContent) |
| 1274 | paintCarets(paintInfo, paintOffset); |
| 1275 | } |
| 1276 | |
| 1277 | static ContinuationOutlineTableMap* continuationOutlineTable() |
| 1278 | { |
| 1279 | static NeverDestroyed<ContinuationOutlineTableMap> table; |
| 1280 | return &table.get(); |
| 1281 | } |
| 1282 | |
| 1283 | void RenderBlock::addContinuationWithOutline(RenderInline* flow) |
| 1284 | { |
| 1285 | // We can't make this work if the inline is in a layer. We'll just rely on the broken |
| 1286 | // way of painting. |
| 1287 | ASSERT(!flow->layer() && !flow->isContinuation())((void)0); |
| 1288 | |
| 1289 | auto* table = continuationOutlineTable(); |
| 1290 | auto* continuations = table->get(*this); |
| 1291 | if (!continuations) { |
| 1292 | continuations = new SingleThreadWeakListHashSet<RenderInline>; |
| 1293 | table->set(*this, std::unique_ptr<SingleThreadWeakListHashSet<RenderInline>>(continuations)); |
| 1294 | } |
| 1295 | |
| 1296 | continuations->add(*flow); |
| 1297 | } |
| 1298 | |
| 1299 | bool RenderBlock::establishesIndependentFormattingContextIgnoringDisplayType(const RenderStyle& style) const |
| 1300 | { |
| 1301 | RefPtr element = this->element(); |
| 1302 | if (!element) { |
| 1303 | ASSERT(isAnonymous())((void)0); |
| 1304 | return false; |
| 1305 | } |
| 1306 | |
| 1307 | auto isBlockBoxWithPotentiallyScrollableOverflow = [&] { |
| 1308 | return style.display().isBlockType() |
| 1309 | && style.display().doesGenerateBlockContainer() |
| 1310 | && hasNonVisibleOverflow() |
| 1311 | && style.overflowX() != Overflow::Clip |
| 1312 | && style.overflowX() != Overflow::Visible; |
| 1313 | }; |
| 1314 | |
| 1315 | return style.floating() != Float::None |
| 1316 | || style.hasOutOfFlowPosition() |
| 1317 | || isBlockBoxWithPotentiallyScrollableOverflow() |
| 1318 | || style.usedContain().contains(Style::ContainValue::Layout) |
| 1319 | || style.containerType() != ContainerType::Normal |
| 1320 | || Style::ContainmentChecker { style, *element }.shouldApplyPaintContainment() |
| 1321 | || (style.display().isBlockType() && !style.blockStepSize().isNone()); |
| 1322 | } |
| 1323 | |
| 1324 | bool RenderBlock::establishesIndependentFormattingContext() const |
| 1325 | { |
| 1326 | auto& style = this->style(); |
| 1327 | if (establishesIndependentFormattingContextIgnoringDisplayType(style)) |
| 1328 | return true; |
| 1329 | |
| 1330 | if (isGridItem()) { |
| 1331 | // Grid items establish a new independent formatting context, unless they're a subgrid |
| 1332 | // https://drafts.csswg.org/css-grid-2/#grid-item-display |
| 1333 | if (!style.gridTemplateColumns().subgrid && !style.gridTemplateRows().subgrid) |
| 1334 | return true; |
| 1335 | // Masonry makes grid items not subgrids. |
| 1336 | if (CheckedPtr parentGridBox = dynamicDowncast<RenderGrid>(parent())) |
| 1337 | return parentGridBox->isMasonry(); |
| 1338 | } |
| 1339 | |
| 1340 | return false; |
| 1341 | } |
| 1342 | |
| 1343 | bool RenderBlock::createsNewFormattingContext() const |
| 1344 | { |
| 1345 | // Writing-mode changes establish an independent block formatting context |
| 1346 | // if the box is a block-container. |
| 1347 | // https://drafts.csswg.org/css-writing-modes/#block-flow |
| 1348 | if (isWritingModeRoot() && isBlockContainer()) |
| 1349 | return true; |
| 1350 | auto& style = this->style(); |
| 1351 | if (isBlockContainer() && !style.alignContent().isNormal()) |
| 1352 | return true; |
| 1353 | return isNonReplacedAtomicInlineLevelBox() |
| 1354 | || style.display().isFlexibleBoxIncludingDeprecatedOrGridFormattingContextBox() |
| 1355 | || isFlexItemIncludingDeprecated() |
| 1356 | || isRenderTable() |
| 1357 | || isRenderTableCell() |
| 1358 | || isRenderTableCaption() |
| 1359 | || isFieldset() |
| 1360 | || isDocumentElementRenderer() |
| 1361 | || isRenderFragmentedFlow() |
| 1362 | || isRenderOrLegacyRenderSVGForeignObject() |
| 1363 | || style.specifiesColumns() |
| 1364 | || style.columnSpan() == ColumnSpan::All |
| 1365 | || style.display() == Style::DisplayType::BlockFlowRoot |
| 1366 | || establishesIndependentFormattingContext(); |
| 1367 | } |
| 1368 | |
| 1369 | #if ASSERT_ENABLED0 |
| 1370 | bool RenderBlock::paintsContinuationOutline(const RenderInline& renderer) |
| 1371 | { |
| 1372 | if (auto* continuations = continuationOutlineTable()->get(*this)) |
| 1373 | return continuations->contains(renderer); |
| 1374 | return false; |
| 1375 | } |
| 1376 | #endif |
| 1377 | |
| 1378 | void RenderBlock::paintContinuationOutlines(PaintInfo& info, const LayoutPoint& paintOffset) |
| 1379 | { |
| 1380 | auto* table = continuationOutlineTable(); |
| 1381 | auto continuations = table->take(*this); |
| 1382 | if (!continuations) |
| 1383 | return; |
| 1384 | |
| 1385 | LayoutPoint accumulatedPaintOffset = paintOffset; |
| 1386 | // Paint each continuation outline. |
| 1387 | OutlinePainter outlinePainter { info }; |
| 1388 | for (auto& renderInline : *continuations) { |
| 1389 | // Need to add in the coordinates of the intervening blocks. |
| 1390 | auto* block = renderInline.containingBlock(); |
| 1391 | for ( ; block && block != this; block = block->containingBlock()) |
| 1392 | accumulatedPaintOffset.moveBy(block->location()); |
| 1393 | ASSERT(block)((void)0); |
| 1394 | outlinePainter.paintOutline(renderInline, accumulatedPaintOffset); |
| 1395 | } |
| 1396 | } |
| 1397 | |
| 1398 | bool RenderBlock::shouldPaintSelectionGaps() const |
| 1399 | { |
| 1400 | return selectionState() != HighlightState::None && style().usedVisibility() == Visibility::Visible && isSelectionRoot(); |
| 1401 | } |
| 1402 | |
| 1403 | bool RenderBlock::isSelectionRoot() const |
| 1404 | { |
| 1405 | if (isPseudoElement()) |
| 1406 | return false; |
| 1407 | ASSERT(element() || isAnonymous())((void)0); |
| 1408 | |
| 1409 | // FIXME: Eventually tables should have to learn how to fill gaps between cells, at least in simple non-spanning cases. |
| 1410 | if (isRenderTable()) |
| 1411 | return false; |
| 1412 | |
| 1413 | if (isBody() || isDocumentElementRenderer() || hasNonVisibleOverflow() |
| 1414 | || isPositioned() || isFloating() |
| 1415 | || isRenderTableCell() || isNonReplacedAtomicInlineLevelBox() |
| 1416 | || isTransformed() || hasReflection() || hasMask() || isWritingModeRoot() |
| 1417 | || isRenderFragmentedFlow() || style().columnSpan() == ColumnSpan::All |
| 1418 | || isFlexItemIncludingDeprecated() || isGridItem()) |
| 1419 | return true; |
| 1420 | |
| 1421 | if (view().selection().start()) { |
| 1422 | RefPtr startElement = view().selection().start()->node(); |
| 1423 | if (startElement && startElement->rootEditableElement() == element()) |
| 1424 | return true; |
| 1425 | } |
| 1426 | |
| 1427 | return false; |
| 1428 | } |
| 1429 | |
| 1430 | GapRects RenderBlock::selectionGapRectsForRepaint(const RenderLayerModelObject* repaintContainer) |
| 1431 | { |
| 1432 | ASSERT(!needsLayout())((void)0); |
| 1433 | |
| 1434 | if (!shouldPaintSelectionGaps()) |
| 1435 | return { }; |
| 1436 | |
| 1437 | FloatPoint containerPoint = localToContainerPoint(FloatPoint(), repaintContainer, UseTransforms); |
| 1438 | LayoutPoint offsetFromRepaintContainer(containerPoint - toFloatSize(scrollPosition())); |
| 1439 | |
| 1440 | #if ENABLE(TEXT_SELECTION)(defined 0 && 0) |
| 1441 | ASSERT(isSelectionRoot())((void)0); |
| 1442 | #endif |
| 1443 | LogicalSelectionOffsetCaches cache(*this); |
| 1444 | LayoutUnit lastTop; |
| 1445 | LayoutUnit lastLeft = logicalLeftSelectionOffset(*this, lastTop, cache); |
| 1446 | LayoutUnit lastRight = logicalRightSelectionOffset(*this, lastTop, cache); |
| 1447 | |
| 1448 | return selectionGaps(*this, offsetFromRepaintContainer, IntSize(), lastTop, lastLeft, lastRight, cache); |
| 1449 | } |
| 1450 | |
| 1451 | void RenderBlock::paintSelection(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| 1452 | { |
| 1453 | #if ENABLE(TEXT_SELECTION)(defined 0 && 0) |
| 1454 | if (shouldPaintSelectionGaps() && paintInfo.phase == PaintPhase::Foreground) { |
| 1455 | ASSERT(isSelectionRoot())((void)0); |
| 1456 | LogicalSelectionOffsetCaches cache(*this); |
| 1457 | LayoutUnit lastTop; |
| 1458 | LayoutUnit lastLeft = logicalLeftSelectionOffset(*this, lastTop, cache); |
| 1459 | LayoutUnit lastRight = logicalRightSelectionOffset(*this, lastTop, cache); |
| 1460 | GraphicsContextStateSaver stateSaver(paintInfo.context()); |
| 1461 | |
| 1462 | LayoutRect gapRectsBounds = selectionGaps(*this, paintOffset, LayoutSize(), lastTop, lastLeft, lastRight, cache, &paintInfo); |
| 1463 | if (!gapRectsBounds.isEmpty()) { |
| 1464 | if (CheckedPtr layer = enclosingLayer()) { |
| 1465 | gapRectsBounds.moveBy(-paintOffset); |
| 1466 | if (!hasLayer()) { |
| 1467 | LayoutRect localBounds(gapRectsBounds); |
| 1468 | flipForWritingMode(localBounds); |
| 1469 | gapRectsBounds = localToContainerQuad(FloatRect(localBounds), &layer->renderer()).enclosingBoundingBox(); |
| 1470 | if (layer->renderer().isRenderBox()) |
| 1471 | gapRectsBounds.moveBy(layer->renderBox()->scrollPosition()); |
| 1472 | } |
| 1473 | layer->addBlockSelectionGapsBounds(gapRectsBounds); |
| 1474 | } |
| 1475 | } |
| 1476 | } |
| 1477 | #else |
| 1478 | UNUSED_PARAM(paintInfo)(void)paintInfo; |
| 1479 | UNUSED_PARAM(paintOffset)(void)paintOffset; |
| 1480 | #endif |
| 1481 | } |
| 1482 | |
| 1483 | static void clipOutOutOfFlowBoxes(const PaintInfo* paintInfo, const LayoutPoint& offset, TrackedRendererListHashSet* outOfFlowBoxes) |
| 1484 | { |
| 1485 | if (!outOfFlowBoxes) |
| 1486 | return; |
| 1487 | |
| 1488 | for (auto& renderer : *outOfFlowBoxes) |
| 1489 | paintInfo->context().clipOut(IntRect(offset.x() + renderer.x(), offset.y() + renderer.y(), renderer.width(), renderer.height())); |
| 1490 | } |
| 1491 | |
| 1492 | LayoutUnit blockDirectionOffset(RenderBlock& rootBlock, const LayoutSize& offsetFromRootBlock) |
| 1493 | { |
| 1494 | return rootBlock.isHorizontalWritingMode() ? offsetFromRootBlock.height() : offsetFromRootBlock.width(); |
| 1495 | } |
| 1496 | |
| 1497 | LayoutUnit inlineDirectionOffset(RenderBlock& rootBlock, const LayoutSize& offsetFromRootBlock) |
| 1498 | { |
| 1499 | return rootBlock.isHorizontalWritingMode() ? offsetFromRootBlock.width() : offsetFromRootBlock.height(); |
| 1500 | } |
| 1501 | |
| 1502 | LayoutRect RenderBlock::logicalRectToPhysicalRect(const LayoutPoint& rootBlockPhysicalPosition, const LayoutRect& logicalRect) |
| 1503 | { |
| 1504 | LayoutRect result; |
| 1505 | if (isHorizontalWritingMode()) |
| 1506 | result = logicalRect; |
| 1507 | else |
| 1508 | result = LayoutRect(logicalRect.y(), logicalRect.x(), logicalRect.height(), logicalRect.width()); |
| 1509 | flipForWritingMode(result); |
| 1510 | result.moveBy(rootBlockPhysicalPosition); |
| 1511 | return result; |
| 1512 | } |
| 1513 | |
| 1514 | GapRects RenderBlock::selectionGaps(RenderBlock& rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| 1515 | LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const LogicalSelectionOffsetCaches& cache, const PaintInfo* paintInfo) |
| 1516 | { |
| 1517 | // IMPORTANT: Callers of this method that intend for painting to happen need to do a save/restore. |
| 1518 | // Clip out floating and positioned objects when painting selection gaps. |
| 1519 | if (paintInfo) { |
| 1520 | // Note that we don't clip out overflow for positioned objects. We just stick to the border box. |
| 1521 | LayoutRect flippedBlockRect(offsetFromRootBlock.width(), offsetFromRootBlock.height(), width(), height()); |
| 1522 | rootBlock.flipForWritingMode(flippedBlockRect); |
| 1523 | flippedBlockRect.moveBy(rootBlockPhysicalPosition); |
| 1524 | clipOutOutOfFlowBoxes(paintInfo, flippedBlockRect.location(), outOfFlowBoxes()); |
| 1525 | if (isBody() || isDocumentElementRenderer()) { // The <body> must make sure to examine its containingBlock's positioned objects. |
| 1526 | for (RenderBlock* cb = containingBlock(); cb && !is<RenderView>(*cb); cb = cb->containingBlock()) |
| 1527 | clipOutOutOfFlowBoxes(paintInfo, LayoutPoint(cb->x(), cb->y()), cb->outOfFlowBoxes()); // FIXME: Not right for flipped writing modes. |
| 1528 | } |
| 1529 | clipOutFloatingBoxes(rootBlock, paintInfo, rootBlockPhysicalPosition, offsetFromRootBlock); |
| 1530 | } |
| 1531 | |
| 1532 | // FIXME: overflow: auto/scroll fragments need more math here, since painting in the border box is different from painting in the padding box (one is scrolled, the other is fixed). |
| 1533 | if (!is<RenderBlockFlow>(*this)) { |
| 1534 | // FIXME: Make multi-column selection gap filling work someday. |
| 1535 | return { }; |
| 1536 | } |
| 1537 | |
| 1538 | if (isFlexItem() || isGridItem() || isDeprecatedFlexItem()) { |
| 1539 | // FIXME: Adding a selection gap to these blocks would produce correct (visual) result only if we could also paint selection gaps between them, |
| 1540 | // as we do for blocks in a BFC. Returning an empty gap rect here means we only paint the selection over the content, |
| 1541 | // as opposed to expand it all the way to the end of the container. |
| 1542 | return { }; |
| 1543 | } |
| 1544 | |
| 1545 | if (isTransformed() || style().columnSpan() == ColumnSpan::All || isRenderFragmentedFlow()) { |
| 1546 | // FIXME: We should learn how to gap fill multiple columns and transforms eventually. |
| 1547 | lastLogicalTop = blockDirectionOffset(rootBlock, offsetFromRootBlock) + logicalHeight(); |
| 1548 | lastLogicalLeft = logicalLeftSelectionOffset(rootBlock, logicalHeight(), cache); |
| 1549 | lastLogicalRight = logicalRightSelectionOffset(rootBlock, logicalHeight(), cache); |
| 1550 | return { }; |
| 1551 | } |
| 1552 | |
| 1553 | GapRects result; |
| 1554 | if (childrenInline()) |
| 1555 | result = inlineSelectionGaps(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, lastLogicalTop, lastLogicalLeft, lastLogicalRight, cache, paintInfo); |
| 1556 | else |
| 1557 | result = blockSelectionGaps(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, lastLogicalTop, lastLogicalLeft, lastLogicalRight, cache, paintInfo); |
| 1558 | |
| 1559 | // Fill the vertical gap all the way to the bottom of our block if the selection extends past our block. |
| 1560 | if (&rootBlock == this && (selectionState() != HighlightState::Both && selectionState() != HighlightState::End)) { |
| 1561 | result.uniteCenter(blockSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, |
| 1562 | lastLogicalTop, lastLogicalLeft, lastLogicalRight, logicalHeight(), cache, paintInfo)); |
| 1563 | } |
| 1564 | |
| 1565 | return result; |
| 1566 | } |
| 1567 | |
| 1568 | GapRects NODELETE[[clang::annotate_type("webkit.nodelete")]] RenderBlock::inlineSelectionGaps(RenderBlock&, const LayoutPoint&, const LayoutSize&, LayoutUnit&, LayoutUnit&, LayoutUnit&, const LogicalSelectionOffsetCaches&, const PaintInfo*) |
| 1569 | { |
| 1570 | ASSERT_NOT_REACHED()((void)0); |
| 1571 | return GapRects(); |
| 1572 | } |
| 1573 | |
| 1574 | GapRects RenderBlock::blockSelectionGaps(RenderBlock& rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| 1575 | LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const LogicalSelectionOffsetCaches& cache, const PaintInfo* paintInfo) |
| 1576 | { |
| 1577 | ASSERT(!isSkippedContent())((void)0); |
| 1578 | |
| 1579 | if (isSkippedContentRoot(*this)) |
| 1580 | return { }; |
| 1581 | |
| 1582 | // Jump right to the first block child that contains some selected objects. |
| 1583 | RenderBox* curr; |
| 1584 | for (curr = firstChildBox(); curr && curr->selectionState() == HighlightState::None; curr = curr->nextSiblingBox()) { } |
| 1585 | |
| 1586 | if (!curr) |
| 1587 | return { }; |
| 1588 | |
| 1589 | LogicalSelectionOffsetCaches childCache(*this, cache); |
| 1590 | |
| 1591 | GapRects result; |
| 1592 | for (bool sawSelectionEnd = false; curr && !sawSelectionEnd; curr = curr->nextSiblingBox()) { |
| 1593 | HighlightState childState = curr->selectionState(); |
| 1594 | if (childState == HighlightState::Both || childState == HighlightState::End) |
| 1595 | sawSelectionEnd = true; |
| 1596 | |
| 1597 | if (curr->isFloatingOrOutOfFlowPositioned()) |
| 1598 | continue; // We must be a normal flow object in order to even be considered. |
| 1599 | |
| 1600 | if (curr->isInFlowPositioned() && curr->hasLayer()) { |
| 1601 | // If the relposition offset is anything other than 0, then treat this just like an absolute positioned element. |
| 1602 | // Just disregard it completely. |
| 1603 | LayoutSize relOffset = curr->layer()->offsetForInFlowPosition(); |
| 1604 | if (relOffset.width() || relOffset.height()) |
| 1605 | continue; |
| 1606 | } |
| 1607 | |
| 1608 | // FIXME: Eventually we won't special-case table and other layout roots like this. |
| 1609 | auto propagatesSelectionToChildren = isAnyOf<RenderTable, RenderFlexibleBox, RenderDeprecatedFlexibleBox, RenderGrid>(*curr); |
| 1610 | auto paintsOwnSelection = curr->shouldPaintSelectionGaps() || propagatesSelectionToChildren; |
| 1611 | bool fillBlockGaps = paintsOwnSelection || (curr->canBeSelectionLeaf() && childState != HighlightState::None); |
| 1612 | if (fillBlockGaps) { |
| 1613 | // We need to fill the vertical gap above this object. |
| 1614 | if (childState == HighlightState::End || childState == HighlightState::Inside) { |
| 1615 | // Fill the gap above the object. |
| 1616 | result.uniteCenter(blockSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, |
| 1617 | lastLogicalTop, lastLogicalLeft, lastLogicalRight, curr->logicalTop(), cache, paintInfo)); |
| 1618 | } |
| 1619 | |
| 1620 | // Only fill side gaps for objects that paint their own selection if we know for sure the selection is going to extend all the way *past* |
| 1621 | // our object. We know this if the selection did not end inside our object. |
| 1622 | if (paintsOwnSelection && (childState == HighlightState::Start || sawSelectionEnd)) |
| 1623 | childState = HighlightState::None; |
| 1624 | |
| 1625 | // Fill side gaps on this object based off its state. |
| 1626 | bool leftGap, rightGap; |
| 1627 | getSelectionGapInfo(childState, leftGap, rightGap); |
| 1628 | |
| 1629 | if (leftGap) |
| 1630 | result.uniteLeft(logicalLeftSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, this, curr->logicalLeft(), curr->logicalTop(), curr->logicalHeight(), cache, paintInfo)); |
| 1631 | if (rightGap) |
| 1632 | result.uniteRight(logicalRightSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, this, curr->logicalRight(), curr->logicalTop(), curr->logicalHeight(), cache, paintInfo)); |
| 1633 | |
| 1634 | // Update lastLogicalTop to be just underneath the object. lastLogicalLeft and lastLogicalRight extend as far as |
| 1635 | // they can without bumping into floating or positioned objects. Ideally they will go right up |
| 1636 | // to the border of the root selection block. |
| 1637 | lastLogicalTop = blockDirectionOffset(rootBlock, offsetFromRootBlock) + curr->logicalBottom(); |
| 1638 | lastLogicalLeft = logicalLeftSelectionOffset(rootBlock, curr->logicalBottom(), cache); |
| 1639 | lastLogicalRight = logicalRightSelectionOffset(rootBlock, curr->logicalBottom(), cache); |
| 1640 | } else if (childState != HighlightState::None) { |
| 1641 | if (auto* renderBlock = dynamicDowncast<RenderBlock>(*curr)) { |
| 1642 | // We must be a block that has some selected object inside it, so recur. |
| 1643 | result.unite(renderBlock->selectionGaps(rootBlock, rootBlockPhysicalPosition, LayoutSize(offsetFromRootBlock.width() + curr->x(), offsetFromRootBlock.height() + curr->y()), |
| 1644 | lastLogicalTop, lastLogicalLeft, lastLogicalRight, childCache, paintInfo)); |
| 1645 | } |
| 1646 | } |
| 1647 | } |
| 1648 | return result; |
| 1649 | } |
| 1650 | |
| 1651 | LayoutRect RenderBlock::blockSelectionGap(RenderBlock& rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| 1652 | LayoutUnit lastLogicalTop, LayoutUnit lastLogicalLeft, LayoutUnit lastLogicalRight, LayoutUnit logicalBottom, const LogicalSelectionOffsetCaches& cache, const PaintInfo* paintInfo) |
| 1653 | { |
| 1654 | LayoutUnit logicalTop = lastLogicalTop; |
| 1655 | LayoutUnit logicalHeight = blockDirectionOffset(rootBlock, offsetFromRootBlock) + logicalBottom - logicalTop; |
| 1656 | if (logicalHeight <= 0) |
| 1657 | return LayoutRect(); |
| 1658 | |
| 1659 | // Get the selection offsets for the bottom of the gap |
| 1660 | LayoutUnit logicalLeft = std::max(lastLogicalLeft, logicalLeftSelectionOffset(rootBlock, logicalBottom, cache)); |
| 1661 | LayoutUnit logicalRight = std::min(lastLogicalRight, logicalRightSelectionOffset(rootBlock, logicalBottom, cache)); |
| 1662 | LayoutUnit logicalWidth = logicalRight - logicalLeft; |
| 1663 | if (logicalWidth <= 0) |
| 1664 | return LayoutRect(); |
| 1665 | |
| 1666 | LayoutRect gapRect = rootBlock.logicalRectToPhysicalRect(rootBlockPhysicalPosition, LayoutRect(logicalLeft, logicalTop, logicalWidth, logicalHeight)); |
| 1667 | if (paintInfo) |
| 1668 | paintInfo->context().fillRect(snapRectToDevicePixels(gapRect, protect(document())->deviceScaleFactor()), selectionBackgroundColor()); |
| 1669 | return gapRect; |
| 1670 | } |
| 1671 | |
| 1672 | LayoutRect RenderBlock::logicalLeftSelectionGap(RenderBlock& rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, RenderElement* selObj, LayoutUnit logicalLeft, LayoutUnit logicalTop, LayoutUnit logicalHeight, const LogicalSelectionOffsetCaches& cache, const PaintInfo* paintInfo) |
| 1673 | { |
| 1674 | LayoutUnit rootBlockLogicalTop = blockDirectionOffset(rootBlock, offsetFromRootBlock) + logicalTop; |
| 1675 | LayoutUnit rootBlockLogicalLeft = std::max(logicalLeftSelectionOffset(rootBlock, logicalTop, cache), logicalLeftSelectionOffset(rootBlock, logicalTop + logicalHeight, cache)); |
| 1676 | LayoutUnit rootBlockLogicalRight = std::min(inlineDirectionOffset(rootBlock, offsetFromRootBlock) + logicalLeft, |
| 1677 | std::min(logicalRightSelectionOffset(rootBlock, logicalTop, cache), logicalRightSelectionOffset(rootBlock, logicalTop + logicalHeight, cache))); |
| 1678 | LayoutUnit rootBlockLogicalWidth = rootBlockLogicalRight - rootBlockLogicalLeft; |
| 1679 | if (rootBlockLogicalWidth <= 0) |
| 1680 | return LayoutRect(); |
| 1681 | |
| 1682 | LayoutRect gapRect = rootBlock.logicalRectToPhysicalRect(rootBlockPhysicalPosition, LayoutRect(rootBlockLogicalLeft, rootBlockLogicalTop, rootBlockLogicalWidth, logicalHeight)); |
| 1683 | if (paintInfo) |
| 1684 | paintInfo->context().fillRect(snapRectToDevicePixels(gapRect, protect(document())->deviceScaleFactor()), selObj->selectionBackgroundColor()); |
| 1685 | return gapRect; |
| 1686 | } |
| 1687 | |
| 1688 | LayoutRect RenderBlock::logicalRightSelectionGap(RenderBlock& rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, RenderElement* selObj, LayoutUnit logicalRight, LayoutUnit logicalTop, LayoutUnit logicalHeight, const LogicalSelectionOffsetCaches& cache, const PaintInfo* paintInfo) |
| 1689 | { |
| 1690 | LayoutUnit rootBlockLogicalTop = blockDirectionOffset(rootBlock, offsetFromRootBlock) + logicalTop; |
| 1691 | LayoutUnit rootBlockLogicalLeft = std::max(inlineDirectionOffset(rootBlock, offsetFromRootBlock) + logicalRight, |
| 1692 | std::max(logicalLeftSelectionOffset(rootBlock, logicalTop, cache), logicalLeftSelectionOffset(rootBlock, logicalTop + logicalHeight, cache))); |
| 1693 | LayoutUnit rootBlockLogicalRight = std::min(logicalRightSelectionOffset(rootBlock, logicalTop, cache), logicalRightSelectionOffset(rootBlock, logicalTop + logicalHeight, cache)); |
| 1694 | LayoutUnit rootBlockLogicalWidth = rootBlockLogicalRight - rootBlockLogicalLeft; |
| 1695 | if (rootBlockLogicalWidth <= 0) |
| 1696 | return LayoutRect(); |
| 1697 | |
| 1698 | LayoutRect gapRect = rootBlock.logicalRectToPhysicalRect(rootBlockPhysicalPosition, LayoutRect(rootBlockLogicalLeft, rootBlockLogicalTop, rootBlockLogicalWidth, logicalHeight)); |
| 1699 | if (paintInfo) |
| 1700 | paintInfo->context().fillRect(snapRectToDevicePixels(gapRect, protect(document())->deviceScaleFactor()), selObj->selectionBackgroundColor()); |
| 1701 | return gapRect; |
| 1702 | } |
| 1703 | |
| 1704 | void RenderBlock::getSelectionGapInfo(HighlightState state, bool& leftGap, bool& rightGap) |
| 1705 | { |
| 1706 | bool ltr = writingMode().isLogicalLeftInlineStart(); |
| 1707 | leftGap = (state == RenderObject::HighlightState::Inside) || (state == RenderObject::HighlightState::End && ltr) || (state == RenderObject::HighlightState::Start && !ltr); |
| 1708 | rightGap = (state == RenderObject::HighlightState::Inside) || (state == RenderObject::HighlightState::Start && ltr) || (state == RenderObject::HighlightState::End && !ltr); |
| 1709 | } |
| 1710 | |
| 1711 | LayoutUnit RenderBlock::logicalLeftSelectionOffset(RenderBlock& rootBlock, LayoutUnit position, const LogicalSelectionOffsetCaches& cache) |
| 1712 | { |
| 1713 | LayoutUnit logicalLeft = logicalLeftOffsetForLine(position); |
| 1714 | if (logicalLeft == logicalLeftOffsetForContent()) { |
| 1715 | if (&rootBlock != this) // The border can potentially be further extended by our containingBlock(). |
| 1716 | return cache.containingBlockInfo(*this).logicalLeftSelectionOffset(rootBlock, position + logicalTop()); |
| 1717 | return logicalLeft; |
| 1718 | } |
| 1719 | |
| 1720 | RenderBlock* cb = this; |
| 1721 | const LogicalSelectionOffsetCaches* currentCache = &cache; |
| 1722 | while (cb != &rootBlock) { |
| 1723 | logicalLeft += cb->logicalLeft(); |
| 1724 | |
| 1725 | ASSERT(currentCache)((void)0); |
| 1726 | auto info = currentCache->containingBlockInfo(*cb); |
| 1727 | cb = info.block(); |
| 1728 | if (!cb) |
| 1729 | break; |
| 1730 | currentCache = info.cache(); |
| 1731 | } |
| 1732 | return logicalLeft; |
| 1733 | } |
| 1734 | |
| 1735 | LayoutUnit RenderBlock::logicalRightSelectionOffset(RenderBlock& rootBlock, LayoutUnit position, const LogicalSelectionOffsetCaches& cache) |
| 1736 | { |
| 1737 | LayoutUnit logicalRight = logicalRightOffsetForLine(position); |
| 1738 | if (logicalRight == logicalRightOffsetForContent()) { |
| 1739 | if (&rootBlock != this) // The border can potentially be further extended by our containingBlock(). |
| 1740 | return cache.containingBlockInfo(*this).logicalRightSelectionOffset(rootBlock, position + logicalTop()); |
| 1741 | return logicalRight; |
| 1742 | } |
| 1743 | |
| 1744 | RenderBlock* cb = this; |
| 1745 | const LogicalSelectionOffsetCaches* currentCache = &cache; |
| 1746 | while (cb != &rootBlock) { |
| 1747 | logicalRight += cb->logicalLeft(); |
| 1748 | |
| 1749 | ASSERT(currentCache)((void)0); |
| 1750 | auto info = currentCache->containingBlockInfo(*cb); |
| 1751 | cb = info.block(); |
| 1752 | if (!cb) |
| 1753 | break; |
| 1754 | currentCache = info.cache(); |
| 1755 | } |
| 1756 | return logicalRight; |
| 1757 | } |
| 1758 | |
| 1759 | TrackedRendererListHashSet* RenderBlock::outOfFlowBoxes() const |
| 1760 | { |
| 1761 | return outOfFlowDescendantsMap().positionedRenderers(*this); |
| 1762 | } |
| 1763 | |
| 1764 | void RenderBlock::addOutOfFlowBox(RenderBox& outOfFlowBox) |
| 1765 | { |
| 1766 | ASSERT(outOfFlowBox.isOutOfFlowPositioned())((void)0); |
| 1767 | ASSERT(!isAnonymousBlock())((void)0); |
| 1768 | |
| 1769 | outOfFlowBox.clearGridAreaContentSize(); |
| 1770 | |
| 1771 | if (outOfFlowBox.isRenderFragmentedFlow()) |
| 1772 | return; |
| 1773 | // FIXME: Find out if we can do this as part of outOfFlowBox.setChildNeedsLayout(MarkOnlyThis) |
| 1774 | if (outOfFlowBox.needsLayout()) { |
| 1775 | // We should turn this bit on only while in layout. |
| 1776 | ASSERT(outOfFlowChildNeedsLayout() || view().frameView().layoutContext().isInLayout())((void)0); |
| 1777 | setOutOfFlowChildNeedsLayoutBit(true); |
| 1778 | } |
| 1779 | outOfFlowDescendantsMap().addDescendant(*this, outOfFlowBox); |
| 1780 | } |
| 1781 | |
| 1782 | void RenderBlock::removeOutOfFlowBox(const RenderBox& rendererToRemove) |
| 1783 | { |
| 1784 | outOfFlowDescendantsMap().removeDescendant(rendererToRemove); |
| 1785 | } |
| 1786 | |
| 1787 | static inline void markRendererAndParentForLayout(RenderBox& renderer) |
| 1788 | { |
| 1789 | renderer.setChildNeedsLayout(MarkOnlyThis); |
| 1790 | if (renderer.shouldInvalidatePreferredWidths()) |
| 1791 | renderer.setNeedsPreferredWidthsUpdate(MarkOnlyThis); |
| 1792 | auto* parentBlock = RenderObject::containingBlockForPositionType(PositionType::Static, renderer); |
| 1793 | if (!parentBlock) { |
| 1794 | ASSERT_NOT_REACHED()((void)0); |
| 1795 | return; |
| 1796 | } |
| 1797 | // Parent has to be mark for layout to run static positioning on the out-of-flow content. |
| 1798 | parentBlock->setChildNeedsLayout(); |
| 1799 | } |
| 1800 | |
| 1801 | void RenderBlock::removeOutOfFlowBoxes(const RenderBlock* newContainingBlockCandidate, ContainingBlockState containingBlockState) |
| 1802 | { |
| 1803 | auto* outOfFlowDescendants = outOfFlowBoxes(); |
| 1804 | if (!outOfFlowDescendants) |
| 1805 | return; |
| 1806 | |
| 1807 | Vector<CheckedRef<RenderBox>, 16> renderersToRemove; |
| 1808 | if (!newContainingBlockCandidate) { |
| 1809 | // We don't form containing block for these boxes anymore (either through style change or internal render tree shuffle) |
| 1810 | for (auto& renderer : *outOfFlowDescendants) { |
| 1811 | renderersToRemove.append(renderer); |
| 1812 | |
| 1813 | markRendererAndParentForLayout(renderer); |
| 1814 | auto markNewContainingBlockForLayout = [&] { |
| 1815 | auto isAbsolutePositioned = renderer.isAbsolutelyPositioned(); |
| 1816 | // During style change we can't tell which ancestor is going to be the final containing block, so let's just mark the new candidate dirty. |
| 1817 | auto* newContainingBlock = containingBlock(); |
| 1818 | for (; newContainingBlock && (isAbsolutePositioned ? !newContainingBlock->canContainAbsolutelyPositionedObjects() : newContainingBlock->canContainFixedPositionObjects()); newContainingBlock = newContainingBlock->containingBlock()) { } |
| 1819 | if (newContainingBlock) |
| 1820 | newContainingBlock->setNeedsLayout(); |
| 1821 | }; |
| 1822 | markNewContainingBlockForLayout(); |
| 1823 | } |
| 1824 | } else if (containingBlockState == ContainingBlockState::NewContainingBlock) { |
| 1825 | // Some of the positioned boxes are getting transferred over to newContainingBlockCandidate. |
| 1826 | for (auto& renderer : *outOfFlowDescendants) { |
| 1827 | if (!renderer.isDescendantOf(newContainingBlockCandidate)) |
| 1828 | continue; |
| 1829 | renderersToRemove.append(renderer); |
| 1830 | markRendererAndParentForLayout(renderer); |
| 1831 | } |
| 1832 | } else |
| 1833 | ASSERT_NOT_REACHED()((void)0); |
| 1834 | |
| 1835 | for (auto& renderer : renderersToRemove) |
| 1836 | removeOutOfFlowBox(renderer); |
| 1837 | } |
| 1838 | |
| 1839 | void RenderBlock::addPercentHeightDescendant(RenderBox& descendant) |
| 1840 | { |
| 1841 | insertIntoTrackedRendererMaps(*this, descendant); |
| 1842 | } |
| 1843 | |
| 1844 | void RenderBlock::removePercentHeightDescendant(RenderBox& descendant) |
| 1845 | { |
| 1846 | // We query the map directly, rather than looking at style's |
| 1847 | // logicalHeight()/logicalMinHeight()/logicalMaxHeight() since those |
| 1848 | // can change with writing mode/directional changes. |
| 1849 | removeFromTrackedRendererMaps(descendant); |
| 1850 | } |
| 1851 | |
| 1852 | TrackedRendererListHashSet* RenderBlock::percentHeightDescendants() const |
| 1853 | { |
| 1854 | return percentHeightDescendantsMap ? percentHeightDescendantsMap->get(*this) : nullptr; |
| 1855 | } |
| 1856 | |
| 1857 | bool RenderBlock::hasPercentHeightContainerMap() |
| 1858 | { |
| 1859 | return percentHeightContainerMap; |
| 1860 | } |
| 1861 | |
| 1862 | void RenderBlock::clearPercentHeightDescendantsFrom(RenderBox& parent) |
| 1863 | { |
| 1864 | if (!percentHeightContainerMap) |
| 1865 | return; |
| 1866 | |
| 1867 | for (RenderObject* child = parent.firstChild(); child; child = child->nextInPreOrder(&parent)) { |
| 1868 | if (CheckedPtr box = dynamicDowncast<RenderBox>(*child)) |
| 1869 | removeFromTrackedRendererMaps(*box); |
| 1870 | } |
| 1871 | } |
| 1872 | |
| 1873 | bool RenderBlock::isContainingBlockAncestorFor(RenderObject& renderer) const |
| 1874 | { |
| 1875 | for (const auto* ancestor = renderer.containingBlock(); ancestor; ancestor = ancestor->containingBlock()) { |
| 1876 | if (ancestor == this) |
| 1877 | return true; |
| 1878 | } |
| 1879 | return false; |
| 1880 | } |
| 1881 | |
| 1882 | LayoutUnit RenderBlock::textIndentOffset() const |
| 1883 | { |
| 1884 | LayoutUnit cw; |
| 1885 | if (style().textIndent().length.isPercentOrCalculated()) |
| 1886 | cw = contentBoxLogicalWidth(); |
| 1887 | return Style::evaluate<LayoutUnit>(style().textIndent().length, cw, style().usedZoomForLength()); |
| 1888 | } |
| 1889 | |
| 1890 | LayoutUnit RenderBlock::logicalLeftOffsetForContent() const |
| 1891 | { |
| 1892 | LayoutUnit logicalLeftOffset = writingMode().isHorizontal() ? borderLeft() + paddingLeft() : borderTop() + paddingTop(); |
| 1893 | if (isHorizontalWritingMode() && shouldPlaceVerticalScrollbarOnLeft()) |
| 1894 | logicalLeftOffset += verticalScrollbarWidth(); |
| 1895 | return logicalLeftOffset; |
| 1896 | } |
| 1897 | |
| 1898 | LayoutUnit RenderBlock::logicalRightOffsetForContent() const |
| 1899 | { |
| 1900 | LayoutUnit logicalRightOffset = writingMode().isHorizontal() ? borderLeft() + paddingLeft() : borderTop() + paddingTop(); |
| 1901 | if (isHorizontalWritingMode() && shouldPlaceVerticalScrollbarOnLeft()) |
| 1902 | logicalRightOffset += verticalScrollbarWidth(); |
| 1903 | logicalRightOffset += contentBoxLogicalWidth(); |
| 1904 | return logicalRightOffset; |
| 1905 | } |
| 1906 | |
| 1907 | LayoutUnit RenderBlock::adjustLogicalLeftOffsetForLine(LayoutUnit offsetFromFloats) const |
| 1908 | { |
| 1909 | LayoutUnit left = offsetFromFloats; |
| 1910 | |
| 1911 | if (style().lineAlign() == LineAlign::None) |
| 1912 | return left; |
| 1913 | |
| 1914 | // Push in our left offset so that it is aligned with the character grid. |
| 1915 | auto* layoutState = view().frameView().layoutContext().layoutState(); |
| 1916 | if (!layoutState) |
| 1917 | return left; |
| 1918 | |
| 1919 | RenderBlock* lineGrid = layoutState->lineGrid(); |
| 1920 | if (!lineGrid || lineGrid->writingMode().computedWritingMode() != writingMode().computedWritingMode()) |
| 1921 | return left; |
| 1922 | |
| 1923 | // FIXME: Should letter-spacing apply? This is complicated since it doesn't apply at the edge? |
| 1924 | float maxCharWidth = lineGrid->style().fontCascade().primaryFont().maxCharWidth(); |
| 1925 | if (!maxCharWidth) |
| 1926 | return left; |
| 1927 | |
| 1928 | LayoutUnit lineGridOffset = lineGrid->isHorizontalWritingMode() ? layoutState->lineGridOffset().width(): layoutState->lineGridOffset().height(); |
| 1929 | LayoutUnit layoutOffset = lineGrid->isHorizontalWritingMode() ? layoutState->layoutOffset().width() : layoutState->layoutOffset().height(); |
| 1930 | |
| 1931 | // Push in to the nearest character width (truncated so that we pixel snap left). |
| 1932 | // FIXME: Should be patched when subpixel layout lands, since this calculation doesn't have to pixel snap |
| 1933 | // any more (https://bugs.webkit.org/show_bug.cgi?id=79946). |
| 1934 | // FIXME: This is wrong for RTL (https://bugs.webkit.org/show_bug.cgi?id=79945). |
| 1935 | // FIXME: This doesn't work with columns or fragments (https://bugs.webkit.org/show_bug.cgi?id=79942). |
| 1936 | // FIXME: This doesn't work when the inline position of the object isn't set ahead of time. |
| 1937 | // FIXME: Dynamic changes to the font or to the inline position need to result in a deep relayout. |
| 1938 | // (https://bugs.webkit.org/show_bug.cgi?id=79944) |
| 1939 | float remainder = fmodf(maxCharWidth - fmodf(left + layoutOffset - lineGridOffset, maxCharWidth), maxCharWidth); |
| 1940 | left += remainder; |
| 1941 | return left; |
| 1942 | } |
| 1943 | |
| 1944 | LayoutUnit RenderBlock::adjustLogicalRightOffsetForLine(LayoutUnit offsetFromFloats) const |
| 1945 | { |
| 1946 | LayoutUnit right = offsetFromFloats; |
| 1947 | |
| 1948 | if (style().lineAlign() == LineAlign::None) |
| 1949 | return right; |
| 1950 | |
| 1951 | // Push in our right offset so that it is aligned with the character grid. |
| 1952 | auto* layoutState = view().frameView().layoutContext().layoutState(); |
| 1953 | if (!layoutState) |
| 1954 | return right; |
| 1955 | |
| 1956 | RenderBlock* lineGrid = layoutState->lineGrid(); |
| 1957 | if (!lineGrid || lineGrid->writingMode().computedWritingMode() != writingMode().computedWritingMode()) |
| 1958 | return right; |
| 1959 | |
| 1960 | // FIXME: Should letter-spacing apply? This is complicated since it doesn't apply at the edge? |
| 1961 | float maxCharWidth = lineGrid->style().fontCascade().primaryFont().maxCharWidth(); |
| 1962 | if (!maxCharWidth) |
| 1963 | return right; |
| 1964 | |
| 1965 | LayoutUnit lineGridOffset = lineGrid->isHorizontalWritingMode() ? layoutState->lineGridOffset().width(): layoutState->lineGridOffset().height(); |
| 1966 | LayoutUnit layoutOffset = lineGrid->isHorizontalWritingMode() ? layoutState->layoutOffset().width() : layoutState->layoutOffset().height(); |
| 1967 | |
| 1968 | // Push in to the nearest character width (truncated so that we pixel snap right). |
| 1969 | // FIXME: Should be patched when subpixel layout lands, since this calculation doesn't have to pixel snap |
| 1970 | // any more (https://bugs.webkit.org/show_bug.cgi?id=79946). |
| 1971 | // FIXME: This is wrong for RTL (https://bugs.webkit.org/show_bug.cgi?id=79945). |
| 1972 | // FIXME: This doesn't work with columns or fragments (https://bugs.webkit.org/show_bug.cgi?id=79942). |
| 1973 | // FIXME: This doesn't work when the inline position of the object isn't set ahead of time. |
| 1974 | // FIXME: Dynamic changes to the font or to the inline position need to result in a deep relayout. |
| 1975 | // (https://bugs.webkit.org/show_bug.cgi?id=79944) |
| 1976 | float remainder = fmodf(fmodf(right + layoutOffset - lineGridOffset, maxCharWidth), maxCharWidth); |
| 1977 | right -= ceilf(remainder); |
| 1978 | return right; |
| 1979 | } |
| 1980 | |
| 1981 | bool RenderBlock::isPointInOverflowControl(HitTestResult& result, const LayoutPoint& locationInContainer, const LayoutPoint& accumulatedOffset) |
| 1982 | { |
| 1983 | if (!scrollsOverflow()) |
| 1984 | return false; |
| 1985 | if (CheckedPtr scrollableArea = layer() ? layer()->scrollableArea() : nullptr) |
| 1986 | return scrollableArea->hitTestOverflowControls(result, roundedIntPoint(locationInContainer - toLayoutSize(accumulatedOffset))); |
| 1987 | return false; |
| 1988 | } |
| 1989 | |
| 1990 | Node* RenderBlock::nodeForHitTest() const |
| 1991 | { |
| 1992 | if (auto type = style().pseudoElementType()) { |
| 1993 | switch (*type) { |
| 1994 | case PseudoElementType::Backdrop: |
| 1995 | // If we're a ::backdrop pseudo-element, we should hit-test to the element that generated it. |
| 1996 | // This matches the behavior that other browsers have. |
| 1997 | for (auto& element : document().topLayerElements()) { |
| 1998 | if (!element->renderer()) |
| 1999 | continue; |
| 2000 | ASSERT(element->renderer()->pseudoElementRenderer(PseudoElementType::Backdrop))((void)0); |
| 2001 | if (element->renderer()->pseudoElementRenderer(PseudoElementType::Backdrop) == this) |
| 2002 | return element.ptr(); |
| 2003 | } |
| 2004 | ASSERT_NOT_REACHED()((void)0); |
| 2005 | break; |
| 2006 | |
| 2007 | case PseudoElementType::ViewTransition: |
| 2008 | case PseudoElementType::ViewTransitionGroup: |
| 2009 | case PseudoElementType::ViewTransitionImagePair: |
| 2010 | // The view transition pseudo-elements should hit-test to their originating element (the document element). |
| 2011 | return document().documentElement(); |
| 2012 | |
| 2013 | default: |
| 2014 | break; |
| 2015 | } |
| 2016 | } |
| 2017 | |
| 2018 | // If we are in the margins of block elements that are part of a |
| 2019 | // continuation we're actually still inside the enclosing element |
| 2020 | // that was split. Use the appropriate inner node. |
| 2021 | if (auto* continuation = this->continuation()) |
| 2022 | return continuation->element(); |
| 2023 | return element(); |
| 2024 | } |
| 2025 | |
| 2026 | bool RenderBlock::hitTestChildren(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& adjustedLocation, HitTestAction hitTestAction) |
| 2027 | { |
| 2028 | ASSERT(!isSkippedContentRoot(*this))((void)0); |
| 2029 | |
| 2030 | // Hit test descendants first. |
| 2031 | const LayoutSize localOffset = toLayoutSize(adjustedLocation); |
| 2032 | const LayoutSize scrolledOffset(localOffset - toLayoutSize(scrollPosition())); |
| 2033 | |
| 2034 | if (hitTestAction == HitTestFloat && hitTestFloats(request, result, locationInContainer, toLayoutPoint(scrolledOffset))) |
| 2035 | return true; |
| 2036 | if (hitTestContents(request, result, locationInContainer, toLayoutPoint(scrolledOffset), hitTestAction)) { |
| 2037 | updateHitTestResult(result, flipForWritingMode(locationInContainer.point() - localOffset)); |
| 2038 | return true; |
| 2039 | } |
| 2040 | return false; |
| 2041 | } |
| 2042 | |
| 2043 | bool RenderBlock::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction) |
| 2044 | { |
| 2045 | const LayoutPoint adjustedLocation(accumulatedOffset + location()); |
| 2046 | const LayoutSize localOffset = toLayoutSize(adjustedLocation); |
| 2047 | |
| 2048 | // Check if we need to do anything at all. |
| 2049 | if (!hitTestVisualOverflow(locationInContainer, accumulatedOffset)) |
| 2050 | return false; |
| 2051 | |
| 2052 | if ((hitTestAction == HitTestBlockBackground || hitTestAction == HitTestChildBlockBackground) |
| 2053 | && visibleToHitTesting(request) && isPointInOverflowControl(result, locationInContainer.point(), adjustedLocation)) { |
| 2054 | updateHitTestResult(result, locationInContainer.point() - localOffset); |
| 2055 | // FIXME: isPointInOverflowControl() doesn't handle rect-based tests yet. |
| 2056 | if (result.addNodeToListBasedTestResult(protect(nodeForHitTest()).get(), request, locationInContainer) == HitTestProgress::Stop) |
| 2057 | return true; |
| 2058 | } |
| 2059 | |
| 2060 | if (!hitTestClipPath(locationInContainer, accumulatedOffset)) |
| 2061 | return false; |
| 2062 | |
| 2063 | auto shouldHittestContent = !isSkippedContentRoot(*this); |
| 2064 | if (shouldHittestContent) { |
| 2065 | // If we have clipping, then we can't have any spillout. |
| 2066 | bool useClip = (hasControlClip() || hasNonVisibleOverflow()); |
| 2067 | bool checkChildren = !useClip || (hasControlClip() ? locationInContainer.intersects(controlClipRect(adjustedLocation)) : locationInContainer.intersects(overflowClipRect(adjustedLocation, OverlayScrollbarSizeRelevancy::IncludeOverlayScrollbarSize))); |
| 2068 | if (checkChildren && hitTestChildren(request, result, locationInContainer, adjustedLocation, hitTestAction)) |
| 2069 | return true; |
| 2070 | |
| 2071 | if (!checkChildren && hitTestExcludedChildrenInBorder(request, result, locationInContainer, adjustedLocation, hitTestAction)) |
| 2072 | return true; |
| 2073 | } |
| 2074 | |
| 2075 | if (!hitTestBorderRadius(locationInContainer, accumulatedOffset)) |
| 2076 | return false; |
| 2077 | |
| 2078 | // Now hit test our background |
| 2079 | if (hitTestAction == HitTestBlockBackground || hitTestAction == HitTestChildBlockBackground) { |
| 2080 | LayoutRect boundsRect(adjustedLocation, size()); |
| 2081 | if (visibleToHitTesting(request) && locationInContainer.intersects(boundsRect)) { |
| 2082 | updateHitTestResult(result, flipForWritingMode(locationInContainer.point() - localOffset)); |
| 2083 | if (result.addNodeToListBasedTestResult(protect(nodeForHitTest()).get(), request, locationInContainer, boundsRect) == HitTestProgress::Stop) |
| 2084 | return true; |
| 2085 | } |
| 2086 | } |
| 2087 | |
| 2088 | return false; |
| 2089 | } |
| 2090 | |
| 2091 | bool RenderBlock::hitTestContents(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction) |
| 2092 | { |
| 2093 | if (childrenInline() && !isRenderTable()) { |
| 2094 | if (style().isSkippedRootOrSkippedContent()) |
| 2095 | return false; |
| 2096 | return hitTestInlineChildren(request, result, locationInContainer, accumulatedOffset, hitTestAction); |
| 2097 | } |
| 2098 | |
| 2099 | // Hit test our children. |
| 2100 | HitTestAction childHitTest = hitTestAction; |
| 2101 | if (hitTestAction == HitTestChildBlockBackgrounds) |
| 2102 | childHitTest = HitTestChildBlockBackground; |
| 2103 | for (auto* child = lastChildBox(); child; child = child->previousSiblingBox()) { |
| 2104 | LayoutPoint childPoint = flipForWritingModeForChild(*child, accumulatedOffset); |
| 2105 | if (!child->hasSelfPaintingLayer() && !child->isFloating() && child->nodeAtPoint(request, result, locationInContainer, childPoint, childHitTest)) |
| 2106 | return true; |
| 2107 | } |
| 2108 | |
| 2109 | return false; |
| 2110 | } |
| 2111 | |
| 2112 | static inline bool isEditingBoundary(RenderElement* ancestor, RenderBox& child) |
| 2113 | { |
| 2114 | ASSERT(!ancestor || ancestor->nonPseudoElement())((void)0); |
| 2115 | ASSERT(child.nonPseudoElement())((void)0); |
| 2116 | return !ancestor || !ancestor->parent() || (ancestor->hasLayer() && ancestor->parent()->isRenderView()) |
| 2117 | || protect(ancestor->nonPseudoElement())->hasEditableStyle() == protect(child.nonPseudoElement())->hasEditableStyle(); |
| 2118 | } |
| 2119 | |
| 2120 | // FIXME: This function should go on RenderObject as an instance method. Then |
| 2121 | // all cases in which positionForPoint recurs could call this instead to |
| 2122 | // prevent crossing editable boundaries. This would require many tests. |
| 2123 | PositionWithAffinity positionForPointRespectingEditingBoundaries(RenderBlock& parent, RenderBox& child, const LayoutPoint& pointInParentCoordinates, HitTestSource source) |
| 2124 | { |
| 2125 | LayoutPoint childLocation = child.location(); |
| 2126 | if (child.isInFlowPositioned()) |
| 2127 | childLocation += child.offsetForInFlowPosition(); |
| 2128 | |
| 2129 | // FIXME: This is wrong if the child's writing-mode is different from the parent's. |
| 2130 | LayoutPoint pointInChildCoordinates(toLayoutPoint(pointInParentCoordinates - childLocation)); |
| 2131 | |
| 2132 | // If this is an anonymous renderer, we just recur normally |
| 2133 | RefPtr childElement= child.nonPseudoElement(); |
| 2134 | if (!childElement) |
| 2135 | return child.positionForPoint(pointInChildCoordinates, source, nullptr); |
| 2136 | |
| 2137 | // Otherwise, first make sure that the editability of the parent and child agree. |
| 2138 | // If they don't agree, then we return a visible position just before or after the child |
| 2139 | RenderElement* ancestor = &parent; |
| 2140 | while (ancestor && !ancestor->nonPseudoElement()) |
| 2141 | ancestor = ancestor->parent(); |
| 2142 | |
| 2143 | // If we can't find an ancestor to check editability on, or editability is unchanged, we recur like normal |
| 2144 | if (isEditingBoundary(ancestor, child)) |
| 2145 | return child.positionForPoint(pointInChildCoordinates, source, nullptr); |
| 2146 | |
| 2147 | // Otherwise return before or after the child, depending on if the click was to the logical left or logical right of the child |
| 2148 | LayoutUnit childMiddle = parent.logicalWidthForChild(child) / 2; |
| 2149 | LayoutUnit logicalLeft = parent.isHorizontalWritingMode() ? pointInChildCoordinates.x() : pointInChildCoordinates.y(); |
| 2150 | if (logicalLeft < childMiddle) |
| 2151 | return ancestor->createPositionWithAffinity(childElement->computeNodeIndex(), Affinity::Downstream); |
| 2152 | return ancestor->createPositionWithAffinity(childElement->computeNodeIndex() + 1, Affinity::Upstream); |
| 2153 | } |
| 2154 | |
| 2155 | PositionWithAffinity RenderBlock::positionForPointWithInlineChildren(const LayoutPoint&, HitTestSource) |
| 2156 | { |
| 2157 | ASSERT_NOT_REACHED()((void)0); |
| 2158 | return PositionWithAffinity(); |
| 2159 | } |
| 2160 | |
| 2161 | static inline bool NODELETE[[clang::annotate_type("webkit.nodelete")]] isChildHitTestCandidate(const RenderBox& box, HitTestSource source) |
| 2162 | { |
| 2163 | auto visibility = source == HitTestSource::Script ? box.style().visibility() : box.style().usedVisibility(); |
| 2164 | return box.height() && visibility == Visibility::Visible && !box.isOutOfFlowPositioned() && !box.isRenderFragmentedFlow(); |
| 2165 | } |
| 2166 | |
| 2167 | // Valid candidates in a FragmentedFlow must be rendered by the fragment. |
| 2168 | static inline bool isChildHitTestCandidate(const RenderBox& box, const RenderFragmentContainer* fragment, const LayoutPoint& point, HitTestSource source) |
| 2169 | { |
| 2170 | if (!isChildHitTestCandidate(box, source)) |
| 2171 | return false; |
| 2172 | if (!fragment) |
| 2173 | return true; |
| 2174 | auto& block = [&]() -> const RenderBlock& { |
| 2175 | if (auto* block = dynamicDowncast<RenderBlock>(box)) |
| 2176 | return *block; |
| 2177 | return *box.containingBlock(); |
| 2178 | }(); |
| 2179 | return block.fragmentAtBlockOffset(point.y()) == fragment; |
| 2180 | } |
| 2181 | |
| 2182 | PositionWithAffinity RenderBlock::positionForPoint(const LayoutPoint& point, HitTestSource source, const RenderFragmentContainer* fragment) |
| 2183 | { |
| 2184 | if (isRenderTable()) |
| 2185 | return RenderBox::positionForPoint(point, source, fragment); |
| 2186 | |
| 2187 | if (isBlockLevelReplacedOrAtomicInline()) { |
| 2188 | // FIXME: This seems wrong when the object's writing-mode doesn't match the line's writing-mode. |
| 2189 | LayoutUnit pointLogicalLeft = isHorizontalWritingMode() ? point.x() : point.y(); |
| 2190 | LayoutUnit pointLogicalTop = isHorizontalWritingMode() ? point.y() : point.x(); |
| 2191 | |
| 2192 | if (pointLogicalLeft < 0) |
| 2193 | return createPositionWithAffinity(caretMinOffset(), Affinity::Downstream); |
| 2194 | if (pointLogicalLeft >= logicalWidth()) |
| 2195 | return createPositionWithAffinity(caretMaxOffset(), Affinity::Downstream); |
| 2196 | if (pointLogicalTop < 0) |
| 2197 | return createPositionWithAffinity(caretMinOffset(), Affinity::Downstream); |
| 2198 | if (pointLogicalTop >= logicalHeight()) |
| 2199 | return createPositionWithAffinity(caretMaxOffset(), Affinity::Downstream); |
| 2200 | } |
| 2201 | if (isFlexibleBoxIncludingDeprecated() || isRenderGrid()) |
| 2202 | return RenderBox::positionForPoint(point, source, fragment); |
| 2203 | |
| 2204 | LayoutPoint pointInContents = point; |
| 2205 | offsetForContents(pointInContents); |
| 2206 | LayoutPoint pointInLogicalContents(pointInContents); |
| 2207 | if (!isHorizontalWritingMode()) |
| 2208 | pointInLogicalContents = pointInLogicalContents.transposedPoint(); |
| 2209 | |
| 2210 | if (childrenInline()) |
| 2211 | return positionForPointWithInlineChildren(pointInLogicalContents, source); |
| 2212 | |
| 2213 | RenderBox* lastCandidateBox = lastChildBox(); |
| 2214 | |
| 2215 | if (!fragment) |
| 2216 | fragment = fragmentAtBlockOffset(pointInLogicalContents.y()); |
| 2217 | |
| 2218 | while (lastCandidateBox && !isChildHitTestCandidate(*lastCandidateBox, fragment, pointInLogicalContents, source)) |
| 2219 | lastCandidateBox = lastCandidateBox->previousSiblingBox(); |
| 2220 | |
| 2221 | bool blocksAreFlipped = writingMode().isBlockFlipped(); |
| 2222 | if (lastCandidateBox) { |
| 2223 | if (pointInLogicalContents.y() > logicalTopForChild(*lastCandidateBox) |
| 2224 | || (!blocksAreFlipped && pointInLogicalContents.y() == logicalTopForChild(*lastCandidateBox))) |
| 2225 | return positionForPointRespectingEditingBoundaries(*this, *lastCandidateBox, pointInContents, source); |
| 2226 | |
| 2227 | for (auto& childBox : childrenOfType<RenderBox>(*this)) { |
| 2228 | if (!isChildHitTestCandidate(childBox, fragment, pointInLogicalContents, source)) |
| 2229 | continue; |
| 2230 | auto childLogicalBottom = logicalTopForChild(childBox) + logicalHeightForChild(childBox); |
| 2231 | if (auto* blockFlow = dynamicDowncast<RenderBlockFlow>(childBox)) |
| 2232 | childLogicalBottom = std::max(childLogicalBottom, blockFlow->lowestFloatLogicalBottom()); |
| 2233 | // We hit child if our click is above the bottom of its padding box (like IE6/7 and FF3). |
| 2234 | if (pointInLogicalContents.y() < childLogicalBottom || (blocksAreFlipped && pointInLogicalContents.y() == childLogicalBottom)) |
| 2235 | return positionForPointRespectingEditingBoundaries(*this, childBox, pointInContents, source); |
| 2236 | } |
| 2237 | } |
| 2238 | |
| 2239 | // We only get here if there are no hit test candidate children below the click. |
| 2240 | return RenderBox::positionForPoint(point, source, fragment); |
| 2241 | } |
| 2242 | |
| 2243 | void RenderBlock::offsetForContents(LayoutPoint& offset) const |
| 2244 | { |
| 2245 | offset = flipForWritingMode(offset); |
| 2246 | offset += toLayoutSize(scrollPosition()); |
| 2247 | offset = flipForWritingMode(offset); |
| 2248 | } |
| 2249 | |
| 2250 | bool RenderBlock::willStretchItem(const RenderBox& item, LogicalBoxAxis containingAxis, StretchingMode mode) const |
| 2251 | { |
| 2252 | UNUSED_PARAM(item)(void)item; |
| 2253 | UNUSED_PARAM(containingAxis)(void)containingAxis; |
| 2254 | UNUSED_PARAM(mode)(void)mode; |
| 2255 | return false; |
| 2256 | } |
| 2257 | |
| 2258 | void RenderBlock::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const |
| 2259 | { |
| 2260 | ASSERT(!childrenInline())((void)0); |
| 2261 | if (shouldApplySizeOrInlineSizeContainment()) { |
| 2262 | if (auto width = explicitIntrinsicInnerLogicalWidth()) { |
| 2263 | minLogicalWidth = width.value(); |
| 2264 | maxLogicalWidth = width.value(); |
| 2265 | } |
| 2266 | } else if (!shouldApplyInlineSizeContainment()) |
| 2267 | computeBlockPreferredLogicalWidths(minLogicalWidth, maxLogicalWidth); |
| 2268 | |
| 2269 | maxLogicalWidth = std::max(minLogicalWidth, maxLogicalWidth); |
| 2270 | |
| 2271 | int scrollbarWidth = intrinsicScrollbarLogicalWidthIncludingGutter(); |
| 2272 | maxLogicalWidth += scrollbarWidth; |
| 2273 | minLogicalWidth += scrollbarWidth; |
| 2274 | } |
| 2275 | |
| 2276 | void RenderBlock::computePreferredLogicalWidths() |
| 2277 | { |
| 2278 | ASSERT(needsPreferredLogicalWidthsUpdate())((void)0); |
| 2279 | |
| 2280 | m_minPreferredLogicalWidth = 0; |
| 2281 | m_maxPreferredLogicalWidth = 0; |
| 2282 | |
| 2283 | auto& styleToUse = style(); |
| 2284 | auto logicalWidth = overridingLogicalWidthForFlexBasisComputation().value_or(styleToUse.logicalWidth()); |
| 2285 | if (auto fixedLogicalWidth = logicalWidth.tryFixed(); !isRenderTableCell() && fixedLogicalWidth && fixedLogicalWidth->isPositiveOrZero() && !(isDeprecatedFlexItem() && !static_cast<int>(fixedLogicalWidth->resolveZoom(style().usedZoomForLength())))) { |
| 2286 | m_minPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(*fixedLogicalWidth); |
| 2287 | m_maxPreferredLogicalWidth = m_minPreferredLogicalWidth; |
| 2288 | } else if (logicalWidth.isMaxContent()) { |
| 2289 | computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth); |
| 2290 | m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth; |
| 2291 | } else if (shouldComputeLogicalWidthFromAspectRatio()) { |
| 2292 | m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = (computeLogicalWidthFromAspectRatio() - borderAndPaddingLogicalWidth()); |
| 2293 | m_minPreferredLogicalWidth = std::max(0_lu, m_minPreferredLogicalWidth); |
| 2294 | m_maxPreferredLogicalWidth = std::max(0_lu, m_maxPreferredLogicalWidth); |
| 2295 | } else |
| 2296 | computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth); |
| 2297 | |
| 2298 | RenderBox::computePreferredLogicalWidths(styleToUse.logicalMinWidth(), styleToUse.logicalMaxWidth(), borderAndPaddingLogicalWidth()); |
| 2299 | |
| 2300 | clearNeedsPreferredWidthsUpdate(); |
| 2301 | } |
| 2302 | |
| 2303 | void RenderBlock::computeBlockPreferredLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const |
| 2304 | { |
| 2305 | ASSERT(!shouldApplyInlineSizeContainment())((void)0); |
| 2306 | auto* containingBlock = this->containingBlock(); |
| 2307 | if (!containingBlock) { |
| 2308 | ASSERT_NOT_REACHED()((void)0); |
| 2309 | return; |
| 2310 | } |
| 2311 | |
| 2312 | LayoutUnit childMinWidth; |
| 2313 | LayoutUnit childMaxWidth; |
| 2314 | if (computePreferredWidthsForExcludedChildren(childMinWidth, childMaxWidth)) { |
| 2315 | minLogicalWidth = std::max(childMinWidth, minLogicalWidth); |
| 2316 | maxLogicalWidth = std::max(childMaxWidth, maxLogicalWidth); |
| 2317 | } |
| 2318 | |
| 2319 | LayoutUnit floatLeftWidth; |
| 2320 | LayoutUnit floatRightWidth; |
| 2321 | auto nowrap = style().textWrapMode() == TextWrapMode::NoWrap && style().whiteSpaceCollapse() == WhiteSpaceCollapse::Collapse; |
| 2322 | for (auto& childBox : childrenOfType<RenderBox>(*this)) { |
| 2323 | // Positioned children don't affect the min/max width. Legends in fieldsets are skipped here |
| 2324 | // since they compute outside of any one layout system. Other children excluded from |
| 2325 | // normal layout are only used with block flows, so it's ok to calculate them here. |
| 2326 | if (childBox.isOutOfFlowPositioned() || childBox.isExcludedAndPlacedInBorder()) |
| 2327 | continue; |
| 2328 | |
| 2329 | auto& childStyle = childBox.style(); |
| 2330 | // Either the box itself of its content avoids floats. |
| 2331 | auto childAvoidsFloats = childBox.avoidsFloats() || (childBox.isAnonymousBlock() && childBox.childrenInline()); |
| 2332 | if (childBox.isFloating() || childAvoidsFloats) { |
| 2333 | LayoutUnit floatTotalWidth = floatLeftWidth + floatRightWidth; |
| 2334 | auto childUsedClear = RenderStyle::usedClear(childBox); |
| 2335 | if (childUsedClear == UsedClear::Left || childUsedClear == UsedClear::Both) { |
| 2336 | maxLogicalWidth = std::max(floatTotalWidth, maxLogicalWidth); |
| 2337 | floatLeftWidth = 0.f; |
| 2338 | } |
| 2339 | if (childUsedClear == UsedClear::Right || childUsedClear == UsedClear::Both) { |
| 2340 | maxLogicalWidth = std::max(floatTotalWidth, maxLogicalWidth); |
| 2341 | floatRightWidth = 0.f; |
| 2342 | } |
| 2343 | } |
| 2344 | |
| 2345 | // A margin basically has three types: fixed, percentage, and auto (variable). |
| 2346 | // Auto and percentage margins simply become 0 when computing min/max width. |
| 2347 | // Fixed margins can be added in as is. |
| 2348 | LayoutUnit marginStart; |
| 2349 | LayoutUnit marginEnd; |
| 2350 | const auto& childZoomFactor = childStyle.usedZoomForLength(); |
| 2351 | if (auto fixedMarginStart = childStyle.marginStart(writingMode()).tryFixed()) |
| 2352 | marginStart += fixedMarginStart->resolveZoom(childZoomFactor); |
| 2353 | if (auto fixedMarginEnd = childStyle.marginEnd(writingMode()).tryFixed()) |
| 2354 | marginEnd += fixedMarginEnd->resolveZoom(childZoomFactor); |
| 2355 | auto margin = marginStart + marginEnd; |
| 2356 | |
| 2357 | LayoutUnit childMinPreferredLogicalWidth; |
| 2358 | LayoutUnit childMaxPreferredLogicalWidth; |
| 2359 | computeChildPreferredLogicalWidths(const_cast<RenderBox&>(childBox), childMinPreferredLogicalWidth, childMaxPreferredLogicalWidth); |
| 2360 | |
| 2361 | auto logicalWidth = childMinPreferredLogicalWidth + margin; |
| 2362 | minLogicalWidth = std::max(logicalWidth, minLogicalWidth); |
| 2363 | |
| 2364 | // IE ignores tables for calculation of nowrap. Makes some sense. |
| 2365 | if (nowrap && !childBox.isRenderTable()) |
| 2366 | maxLogicalWidth = std::max(logicalWidth, maxLogicalWidth); |
| 2367 | |
| 2368 | logicalWidth = childMaxPreferredLogicalWidth + margin; |
| 2369 | |
| 2370 | if (!childBox.isFloating()) { |
| 2371 | if (childAvoidsFloats) { |
| 2372 | // Determine a left and right max value based off whether or not the floats can fit in the |
| 2373 | // margins of the object. For negative margins, we will attempt to overlap the float if the negative margin |
| 2374 | // is smaller than the float width. |
| 2375 | bool ltr = containingBlock->writingMode().isLogicalLeftInlineStart(); |
| 2376 | LayoutUnit marginLogicalLeft = ltr ? marginStart : marginEnd; |
| 2377 | LayoutUnit marginLogicalRight = ltr ? marginEnd : marginStart; |
| 2378 | LayoutUnit maxLeft = marginLogicalLeft > 0 ? std::max(floatLeftWidth, marginLogicalLeft) : floatLeftWidth + marginLogicalLeft; |
| 2379 | LayoutUnit maxRight = marginLogicalRight > 0 ? std::max(floatRightWidth, marginLogicalRight) : floatRightWidth + marginLogicalRight; |
| 2380 | logicalWidth = childMaxPreferredLogicalWidth + maxLeft + maxRight; |
| 2381 | logicalWidth = std::max(logicalWidth, floatLeftWidth + floatRightWidth); |
| 2382 | } else |
| 2383 | maxLogicalWidth = std::max(floatLeftWidth + floatRightWidth, maxLogicalWidth); |
| 2384 | floatLeftWidth = 0.f; |
| 2385 | floatRightWidth = 0.f; |
| 2386 | } |
| 2387 | |
| 2388 | if (childBox.isFloating()) { |
| 2389 | if (RenderStyle::usedFloat(childBox) == UsedFloat::Left) |
| 2390 | floatLeftWidth += logicalWidth; |
| 2391 | else |
| 2392 | floatRightWidth += logicalWidth; |
| 2393 | } else |
| 2394 | maxLogicalWidth = std::max(logicalWidth, maxLogicalWidth); |
| 2395 | } |
| 2396 | |
| 2397 | // Always make sure these values are non-negative. |
| 2398 | minLogicalWidth = std::max(0_lu, minLogicalWidth); |
| 2399 | maxLogicalWidth = std::max(0_lu, maxLogicalWidth); |
| 2400 | |
| 2401 | maxLogicalWidth = std::max(floatLeftWidth + floatRightWidth, maxLogicalWidth); |
| 2402 | } |
| 2403 | |
| 2404 | void RenderBlock::computeChildIntrinsicLogicalWidths(RenderBox& child, LayoutUnit& minPreferredLogicalWidth, LayoutUnit& maxPreferredLogicalWidth) const |
| 2405 | { |
| 2406 | minPreferredLogicalWidth = child.minPreferredLogicalWidth(); |
| 2407 | maxPreferredLogicalWidth = child.maxPreferredLogicalWidth(); |
| 2408 | } |
| 2409 | |
| 2410 | void RenderBlock::computeChildPreferredLogicalWidths(RenderBox& childBox, LayoutUnit& minPreferredLogicalWidth, LayoutUnit& maxPreferredLogicalWidth) const |
| 2411 | { |
| 2412 | if (childBox.isHorizontalWritingMode() != isHorizontalWritingMode()) { |
| 2413 | // If the child is an orthogonal flow, child's height determines the width, |
| 2414 | // but the height is not available until layout. |
| 2415 | // http://dev.w3.org/csswg/css-writing-modes-3/#orthogonal-shrink-to-fit |
| 2416 | if (!childBox.needsLayout()) { |
| 2417 | minPreferredLogicalWidth = childBox.logicalHeight(); |
| 2418 | maxPreferredLogicalWidth = childBox.logicalHeight(); |
| 2419 | return; |
| 2420 | } |
| 2421 | auto& childBoxStyle = childBox.style(); |
| 2422 | if (auto fixedChildBoxStyleLogicalWidth = childBoxStyle.logicalWidth().tryFixed(); childBox.shouldComputeLogicalHeightFromAspectRatio() && fixedChildBoxStyleLogicalWidth) { |
| 2423 | auto aspectRatioSize = blockSizeFromAspectRatio( |
| 2424 | childBox.horizontalBorderAndPaddingExtent(), |
| 2425 | childBox.verticalBorderAndPaddingExtent(), |
| 2426 | LayoutUnit { childBoxStyle.logicalAspectRatio() }, |
| 2427 | childBoxStyle.boxSizingForAspectRatio(), |
| 2428 | LayoutUnit { fixedChildBoxStyleLogicalWidth->resolveZoom(childBoxStyle.usedZoomForLength()) }, |
| 2429 | style().aspectRatio(), |
| 2430 | isRenderReplaced() |
| 2431 | ); |
| 2432 | minPreferredLogicalWidth = aspectRatioSize; |
| 2433 | maxPreferredLogicalWidth = aspectRatioSize; |
| 2434 | return; |
| 2435 | } |
| 2436 | auto logicalHeightWithoutLayout = childBox.computeLogicalHeightWithoutLayout(); |
| 2437 | minPreferredLogicalWidth = logicalHeightWithoutLayout; |
| 2438 | maxPreferredLogicalWidth = logicalHeightWithoutLayout; |
| 2439 | return; |
| 2440 | } |
| 2441 | |
| 2442 | computeChildIntrinsicLogicalWidths(childBox, minPreferredLogicalWidth, maxPreferredLogicalWidth); |
| 2443 | |
| 2444 | // For non-replaced blocks if the inline size is min|max-content or a definite |
| 2445 | // size the min|max-content contribution is that size plus border, padding and |
| 2446 | // margin https://drafts.csswg.org/css-sizing/#block-intrinsic |
| 2447 | if (!is<RenderBlock>(childBox)) |
| 2448 | return; |
| 2449 | auto& computedInlineSize = childBox.style().logicalWidth(); |
| 2450 | if (computedInlineSize.isMaxContent()) |
| 2451 | minPreferredLogicalWidth = maxPreferredLogicalWidth; |
| 2452 | else if (computedInlineSize.isMinContent()) |
| 2453 | maxPreferredLogicalWidth = minPreferredLogicalWidth; |
| 2454 | } |
| 2455 | |
| 2456 | bool RenderBlock::hasLineIfEmpty() const |
| 2457 | { |
| 2458 | RefPtr element = this->element(); |
| 2459 | return element && element->isRootEditableElement(); |
| 2460 | } |
| 2461 | |
| 2462 | std::optional<LayoutUnit> RenderBlock::firstLineBaseline() const |
| 2463 | { |
| 2464 | if (shouldApplyLayoutContainment()) |
| 2465 | return { }; |
| 2466 | |
| 2467 | if (isWritingModeRoot() && !isFlexItem()) |
| 2468 | return { }; |
| 2469 | |
| 2470 | auto firstInFlowBaseline = [&] -> std::optional<LayoutUnit> { |
| 2471 | for (CheckedPtr child = firstInFlowChildBox(); child; child = child->nextInFlowSiblingBox()) { |
| 2472 | if (child->isLegend() && child->isExcludedFromNormalLayout()) |
| 2473 | continue; |
| 2474 | if (auto baseline = child->firstLineBaseline()) |
| 2475 | return (settings().subpixelInlineLayoutEnabled() ? LayoutUnit(child->logicalTop()) : LayoutUnit(child->logicalTop().toInt())) + *baseline; |
| 2476 | } |
| 2477 | return { }; |
| 2478 | }; |
| 2479 | return firstInFlowBaseline(); |
| 2480 | } |
| 2481 | |
| 2482 | std::optional<LayoutUnit> RenderBlock::lastLineBaseline() const |
| 2483 | { |
| 2484 | if (shouldApplyLayoutContainment()) |
| 2485 | return { }; |
| 2486 | |
| 2487 | if (isWritingModeRoot() && !isFlexItem()) |
| 2488 | return { }; |
| 2489 | |
| 2490 | auto lastInFlowBaseline = [&] -> std::optional<LayoutUnit> { |
| 2491 | for (CheckedPtr child = lastInFlowChildBox(); child; child = child->previousInFlowSiblingBox()) { |
| 2492 | if (child->isLegend() && child->isExcludedFromNormalLayout()) |
| 2493 | continue; |
| 2494 | if (auto baseline = child->lastLineBaseline()) |
| 2495 | return (settings().subpixelInlineLayoutEnabled() ? LayoutUnit(child->logicalTop()) : LayoutUnit(child->logicalTop().toInt())) + *baseline; |
| 2496 | } |
| 2497 | return { }; |
| 2498 | }; |
| 2499 | return lastInFlowBaseline(); |
| 2500 | } |
| 2501 | |
| 2502 | static inline bool NODELETE[[clang::annotate_type("webkit.nodelete")]] isRenderBlockFlowOrRenderButton(RenderElement& renderElement) |
| 2503 | { |
| 2504 | // We include isRenderButton in this check because buttons are implemented |
| 2505 | // using flex box but should still support first-line|first-letter. |
| 2506 | // The flex box and specs require that flex box and grid do not support |
| 2507 | // first-line|first-letter, though. |
| 2508 | // FIXME: Remove when buttons are implemented with align-items instead of |
| 2509 | // flex box. |
| 2510 | return renderElement.isRenderBlockFlow() || renderElement.isRenderButton(); |
| 2511 | } |
| 2512 | |
| 2513 | static inline RenderBlock* findFirstLetterBlock(RenderBlock* start) |
| 2514 | { |
| 2515 | RenderBlock* firstLetterBlock = start; |
| 2516 | while (true) { |
| 2517 | bool canHaveFirstLetterRenderer = firstLetterBlock->style().hasPseudoStyle(PseudoElementType::FirstLetter) |
| 2518 | && firstLetterBlock->canHaveGeneratedChildren() |
| 2519 | && isRenderBlockFlowOrRenderButton(*firstLetterBlock); |
| 2520 | if (canHaveFirstLetterRenderer) |
| 2521 | return firstLetterBlock; |
| 2522 | |
| 2523 | RenderElement* parentBlock = firstLetterBlock->parent(); |
| 2524 | if (firstLetterBlock->isBlockLevelReplacedOrAtomicInline() || !parentBlock || parentBlock->firstChild() != firstLetterBlock |
| 2525 | || !isRenderBlockFlowOrRenderButton(*parentBlock)) |
| 2526 | return nullptr; |
| 2527 | firstLetterBlock = downcast<RenderBlock>(parentBlock); |
| 2528 | } |
| 2529 | |
| 2530 | return nullptr; |
| 2531 | } |
| 2532 | |
| 2533 | std::pair<RenderObject*, RenderElement*> RenderBlock::firstLetterAndContainer(RenderObject* skipThisAsFirstLetter) |
| 2534 | { |
| 2535 | // Don't recur |
| 2536 | if (style().pseudoElementType() == PseudoElementType::FirstLetter) |
| 2537 | return { }; |
| 2538 | |
| 2539 | // FIXME: We need to destroy the first-letter object if it is no longer the first child. Need to find |
| 2540 | // an efficient way to check for that situation though before implementing anything. |
| 2541 | RenderElement* firstLetterContainer = findFirstLetterBlock(this); |
| 2542 | if (!firstLetterContainer) |
| 2543 | return { }; |
| 2544 | |
| 2545 | // Drill into inlines looking for our first text descendant. |
| 2546 | auto* firstLetter = firstLetterContainer->firstChild(); |
| 2547 | while (firstLetter) { |
| 2548 | if (is<RenderText>(*firstLetter)) { |
| 2549 | if (firstLetter == skipThisAsFirstLetter) { |
| 2550 | firstLetter = firstLetter->nextSibling(); |
| 2551 | continue; |
| 2552 | } |
| 2553 | break; |
| 2554 | } |
| 2555 | |
| 2556 | RenderElement& current = downcast<RenderElement>(*firstLetter); |
| 2557 | if (is<RenderListMarker>(current)) |
| 2558 | firstLetter = current.nextSibling(); |
| 2559 | else if (current.isFloatingOrOutOfFlowPositioned()) { |
| 2560 | if (current.style().pseudoElementType() == PseudoElementType::FirstLetter) { |
| 2561 | firstLetter = current.firstChild(); |
| 2562 | break; |
| 2563 | } |
| 2564 | firstLetter = current.nextSibling(); |
| 2565 | } else if (current.isBlockLevelReplacedOrAtomicInline() || isAnyOf<RenderButton, RenderMenuList>(current)) |
| 2566 | break; |
| 2567 | else if (current.isFlexibleBoxIncludingDeprecated() || current.isRenderGrid()) |
| 2568 | return { }; |
| 2569 | else if (current.style().hasPseudoStyle(PseudoElementType::FirstLetter) && current.canHaveGeneratedChildren()) { |
| 2570 | // We found a lower-level node with first-letter, which supersedes the higher-level style |
| 2571 | firstLetterContainer = ¤t; |
| 2572 | firstLetter = current.firstChild(); |
| 2573 | } else |
| 2574 | firstLetter = current.firstChild(); |
| 2575 | } |
| 2576 | |
| 2577 | if (!firstLetter) |
| 2578 | return { }; |
| 2579 | |
| 2580 | return { firstLetter, firstLetterContainer }; |
| 2581 | } |
| 2582 | |
| 2583 | RenderFragmentedFlow* RenderBlock::cachedEnclosingFragmentedFlow() const |
| 2584 | { |
| 2585 | RenderBlockRareData* rareData = blockRareData(); |
| 2586 | |
| 2587 | if (!rareData || !rareData->m_enclosingFragmentedFlow) |
| 2588 | return nullptr; |
| 2589 | |
| 2590 | return rareData->m_enclosingFragmentedFlow.value().get(); |
| 2591 | } |
| 2592 | |
| 2593 | bool RenderBlock::cachedEnclosingFragmentedFlowNeedsUpdate() const |
| 2594 | { |
| 2595 | RenderBlockRareData* rareData = blockRareData(); |
| 2596 | |
| 2597 | if (!rareData || !rareData->m_enclosingFragmentedFlow) |
| 2598 | return true; |
| 2599 | |
| 2600 | return false; |
| 2601 | } |
| 2602 | |
| 2603 | void RenderBlock::setCachedEnclosingFragmentedFlowNeedsUpdate() |
| 2604 | { |
| 2605 | RenderBlockRareData& rareData = ensureBlockRareData(); |
| 2606 | rareData.m_enclosingFragmentedFlow = std::nullopt; |
| 2607 | } |
| 2608 | |
| 2609 | RenderFragmentedFlow* RenderBlock::updateCachedEnclosingFragmentedFlow(RenderFragmentedFlow* fragmentedFlow) const |
| 2610 | { |
| 2611 | if (!fragmentedFlow) { |
| 2612 | if (auto* rareData = const_cast<RenderBlock&>(*this).blockRareData()) |
| 2613 | rareData->m_enclosingFragmentedFlow = { }; |
| 2614 | return { }; |
| 2615 | } |
| 2616 | |
| 2617 | const_cast<RenderBlock&>(*this).ensureBlockRareData().m_enclosingFragmentedFlow = fragmentedFlow; |
| 2618 | return fragmentedFlow; |
| 2619 | } |
| 2620 | |
| 2621 | RenderFragmentedFlow* RenderBlock::locateEnclosingFragmentedFlow() const |
| 2622 | { |
| 2623 | RenderBlockRareData* rareData = blockRareData(); |
| 2624 | if (!rareData || !rareData->m_enclosingFragmentedFlow) |
| 2625 | return updateCachedEnclosingFragmentedFlow(RenderBox::locateEnclosingFragmentedFlow()); |
| 2626 | |
| 2627 | ASSERT(rareData->m_enclosingFragmentedFlow.value() == RenderBox::locateEnclosingFragmentedFlow())((void)0); |
| 2628 | return rareData->m_enclosingFragmentedFlow.value().get(); |
| 2629 | } |
| 2630 | |
| 2631 | void RenderBlock::resetEnclosingFragmentedFlowAndChildInfoIncludingDescendants(RenderFragmentedFlow* fragmentedFlow) |
| 2632 | { |
| 2633 | if (fragmentedFlowState() == FragmentedFlowState::NotInsideFlow) |
| 2634 | return; |
| 2635 | |
| 2636 | if (auto* cachedFragmentedFlow = cachedEnclosingFragmentedFlow()) |
| 2637 | fragmentedFlow = cachedFragmentedFlow; |
| 2638 | setCachedEnclosingFragmentedFlowNeedsUpdate(); |
| 2639 | RenderElement::resetEnclosingFragmentedFlowAndChildInfoIncludingDescendants(fragmentedFlow); |
| 2640 | } |
| 2641 | |
| 2642 | LayoutUnit RenderBlock::paginationStrut() const |
| 2643 | { |
| 2644 | RenderBlockRareData* rareData = blockRareData(); |
| 2645 | return rareData ? rareData->m_paginationStrut : 0_lu; |
| 2646 | } |
| 2647 | |
| 2648 | LayoutUnit RenderBlock::pageLogicalOffset() const |
| 2649 | { |
| 2650 | RenderBlockRareData* rareData = blockRareData(); |
| 2651 | return rareData ? rareData->m_pageLogicalOffset : 0_lu; |
| 2652 | } |
| 2653 | |
| 2654 | void RenderBlock::setPaginationStrut(LayoutUnit strut) |
| 2655 | { |
| 2656 | RenderBlockRareData* rareData = blockRareData(); |
| 2657 | if (!rareData) { |
| 2658 | if (!strut) |
| 2659 | return; |
| 2660 | rareData = &ensureBlockRareData(); |
| 2661 | } |
| 2662 | rareData->m_paginationStrut = strut; |
| 2663 | } |
| 2664 | |
| 2665 | void RenderBlock::setPageLogicalOffset(LayoutUnit logicalOffset) |
| 2666 | { |
| 2667 | RenderBlockRareData* rareData = blockRareData(); |
| 2668 | if (!rareData) { |
| 2669 | if (!logicalOffset) |
| 2670 | return; |
| 2671 | rareData = &ensureBlockRareData(); |
| 2672 | } |
| 2673 | rareData->m_pageLogicalOffset = logicalOffset; |
| 2674 | } |
| 2675 | |
| 2676 | void RenderBlock::boundingRects(Vector<LayoutRect>& rects, const LayoutPoint& accumulatedOffset) const |
| 2677 | { |
| 2678 | // For blocks inside inlines, we include margins so that we run right up to the inline boxes |
| 2679 | // above and below us (thus getting merged with them to form a single irregular shape). |
| 2680 | if (auto* continuation = this->continuation()) { |
| 2681 | // FIXME: This is wrong for block-flows that are horizontal. |
| 2682 | // https://bugs.webkit.org/show_bug.cgi?id=46781 |
| 2683 | rects.append(LayoutRect(accumulatedOffset.x(), accumulatedOffset.y() - collapsedMarginBefore(), width(), height() + collapsedMarginBefore() + collapsedMarginAfter())); |
| 2684 | auto* containingBlock = inlineContinuation()->containingBlock(); |
| 2685 | continuation->boundingRects(rects, accumulatedOffset - locationOffset() + containingBlock->locationOffset()); |
| 2686 | } else |
| 2687 | rects.append({ accumulatedOffset, size() }); |
| 2688 | } |
| 2689 | |
| 2690 | void RenderBlock::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const |
| 2691 | { |
| 2692 | if (!continuation()) { |
| 2693 | absoluteQuadsIgnoringContinuation({ { }, size() }, quads, wasFixed); |
| 2694 | return; |
| 2695 | } |
| 2696 | // For blocks inside inlines, we include margins so that we run right up to the inline boxes |
| 2697 | // above and below us (thus getting merged with them to form a single irregular shape). |
| 2698 | auto logicalRect = FloatRect { 0, -collapsedMarginBefore(), width(), height() + collapsedMarginBefore() + collapsedMarginAfter() }; |
| 2699 | absoluteQuadsIgnoringContinuation(logicalRect, quads, wasFixed); |
| 2700 | collectAbsoluteQuadsForContinuation(quads, wasFixed); |
| 2701 | } |
| 2702 | |
| 2703 | void RenderBlock::absoluteQuadsIgnoringContinuation(const FloatRect& logicalRect, Vector<FloatQuad>& quads, bool* wasFixed) const |
| 2704 | { |
| 2705 | // FIXME: This is wrong for block-flows that are horizontal. |
| 2706 | // https://bugs.webkit.org/show_bug.cgi?id=46781 |
| 2707 | CheckedPtr fragmentedFlow = enclosingFragmentedFlow(); |
| 2708 | if (!fragmentedFlow || !fragmentedFlow->absoluteQuadsForBox(quads, wasFixed, *this)) |
| 2709 | quads.append(localToAbsoluteQuad(logicalRect, UseTransforms, wasFixed)); |
| 2710 | } |
| 2711 | |
| 2712 | LayoutRect RenderBlock::rectWithOutlineForRepaint(const RenderLayerModelObject* repaintContainer, LayoutUnit outlineWidth) const |
| 2713 | { |
| 2714 | LayoutRect r(RenderBox::rectWithOutlineForRepaint(repaintContainer, outlineWidth)); |
| 2715 | if (isContinuation()) |
| 2716 | r.inflateY(collapsedMarginBefore()); // FIXME: This is wrong for block-flows that are horizontal. |
| 2717 | return r; |
| 2718 | } |
| 2719 | |
| 2720 | const RenderStyle& RenderBlock::outlineStyleForRepaint() const |
| 2721 | { |
| 2722 | if (auto* continuation = this->continuation()) |
| 2723 | return continuation->style(); |
| 2724 | return RenderElement::outlineStyleForRepaint(); |
| 2725 | } |
| 2726 | |
| 2727 | LayoutUnit RenderBlock::offsetFromLogicalTopOfFirstPage() const |
| 2728 | { |
| 2729 | auto* layoutState = view().frameView().layoutContext().layoutState(); |
| 2730 | if (layoutState && !layoutState->isPaginated()) |
| 2731 | return 0; |
| 2732 | |
| 2733 | if (CheckedPtr fragmentedFlow = enclosingFragmentedFlow()) |
| 2734 | return fragmentedFlow->offsetFromLogicalTopOfFirstFragment(this); |
| 2735 | |
| 2736 | if (layoutState) { |
| 2737 | ASSERT(layoutState->renderer() == this)((void)0); |
| 2738 | |
| 2739 | LayoutSize offsetDelta = layoutState->layoutOffset() - layoutState->pageOffset(); |
| 2740 | return isHorizontalWritingMode() ? offsetDelta.height() : offsetDelta.width(); |
| 2741 | } |
| 2742 | |
| 2743 | ASSERT_NOT_REACHED()((void)0); |
| 2744 | return 0; |
| 2745 | } |
| 2746 | |
| 2747 | RenderFragmentContainer* RenderBlock::fragmentAtBlockOffset(LayoutUnit blockOffset) const |
| 2748 | { |
| 2749 | if (CheckedPtr fragmentedFlow = enclosingFragmentedFlow(); fragmentedFlow && fragmentedFlow->hasValidFragmentInfo()) |
| 2750 | return fragmentedFlow->fragmentAtBlockOffset(this, offsetFromLogicalTopOfFirstPage() + blockOffset, true); |
| 2751 | |
| 2752 | return nullptr; |
| 2753 | } |
| 2754 | |
| 2755 | static bool canComputeFragmentRangeForBox(const RenderBlock& parentBlock, const RenderBox& childBox, const RenderFragmentedFlow& enclosingFragmentedFlow) |
| 2756 | { |
| 2757 | if (!enclosingFragmentedFlow.hasFragments()) |
| 2758 | return false; |
| 2759 | |
| 2760 | if (!childBox.canHaveOutsideFragmentRange()) |
| 2761 | return false; |
| 2762 | |
| 2763 | return enclosingFragmentedFlow.hasCachedFragmentRangeForBox(parentBlock); |
| 2764 | } |
| 2765 | |
| 2766 | bool RenderBlock::childBoxIsUnsplittableForFragmentation(const RenderBox& child) const |
| 2767 | { |
| 2768 | CheckedPtr fragmentedFlow = enclosingFragmentedFlow(); |
| 2769 | bool checkColumnBreaks = fragmentedFlow && fragmentedFlow->shouldCheckColumnBreaks(); |
| 2770 | bool checkPageBreaks = !checkColumnBreaks && view().frameView().layoutContext().layoutState()->pageLogicalHeight(); |
| 2771 | return child.isUnsplittableForPagination() || child.style().breakInside() == BreakInside::Avoid |
| 2772 | || (checkColumnBreaks && child.style().breakInside() == BreakInside::AvoidColumn) |
| 2773 | || (checkPageBreaks && child.style().breakInside() == BreakInside::AvoidPage); |
| 2774 | } |
| 2775 | |
| 2776 | void RenderBlock::computeFragmentRangeForBoxChild(const RenderBox& box) const |
| 2777 | { |
| 2778 | CheckedPtr fragmentedFlow = enclosingFragmentedFlow(); |
| 2779 | ASSERT(fragmentedFlow && canComputeFragmentRangeForBox(*this, box, *fragmentedFlow))((void)0); |
| 2780 | ASSERT(box.fragmentedFlowState() == FragmentedFlowState::InsideFlow)((void)0); |
| 2781 | |
| 2782 | RenderFragmentContainer* startFragment; |
| 2783 | RenderFragmentContainer* endFragment; |
| 2784 | LayoutUnit offsetFromLogicalTopOfFirstFragment = box.offsetFromLogicalTopOfFirstPage(); |
| 2785 | if (childBoxIsUnsplittableForFragmentation(box)) |
| 2786 | startFragment = endFragment = fragmentedFlow->fragmentAtBlockOffset(this, offsetFromLogicalTopOfFirstFragment, true); |
| 2787 | else { |
| 2788 | startFragment = fragmentedFlow->fragmentAtBlockOffset(this, offsetFromLogicalTopOfFirstFragment, true); |
| 2789 | endFragment = fragmentedFlow->fragmentAtBlockOffset(this, offsetFromLogicalTopOfFirstFragment + logicalHeightForChild(box), true); |
| 2790 | } |
| 2791 | |
| 2792 | fragmentedFlow->setFragmentRangeForBox(box, startFragment, endFragment); |
| 2793 | } |
| 2794 | |
| 2795 | void RenderBlock::estimateFragmentRangeForBoxChild(const RenderBox& box) const |
| 2796 | { |
| 2797 | CheckedPtr fragmentedFlow = enclosingFragmentedFlow(); |
| 2798 | if (!fragmentedFlow || box.fragmentedFlowState() == FragmentedFlowState::NotInsideFlow || !canComputeFragmentRangeForBox(*this, box, *fragmentedFlow)) |
| 2799 | return; |
| 2800 | |
| 2801 | if (childBoxIsUnsplittableForFragmentation(box)) { |
| 2802 | computeFragmentRangeForBoxChild(box); |
| 2803 | return; |
| 2804 | } |
| 2805 | |
| 2806 | auto estimatedValues = box.computeLogicalHeight(RenderFragmentedFlow::maxLogicalHeight(), logicalTopForChild(box)); |
| 2807 | LayoutUnit offsetFromLogicalTopOfFirstFragment = box.offsetFromLogicalTopOfFirstPage(); |
| 2808 | RenderFragmentContainer* startFragment = fragmentedFlow->fragmentAtBlockOffset(this, offsetFromLogicalTopOfFirstFragment, true); |
| 2809 | RenderFragmentContainer* endFragment = fragmentedFlow->fragmentAtBlockOffset(this, offsetFromLogicalTopOfFirstFragment + estimatedValues.extent, true); |
| 2810 | |
| 2811 | fragmentedFlow->setFragmentRangeForBox(box, startFragment, endFragment); |
| 2812 | } |
| 2813 | |
| 2814 | bool RenderBlock::updateFragmentRangeForBoxChild(const RenderBox& box) const |
| 2815 | { |
| 2816 | CheckedPtr fragmentedFlow = enclosingFragmentedFlow(); |
| 2817 | if (!fragmentedFlow || box.fragmentedFlowState() == FragmentedFlowState::NotInsideFlow || !canComputeFragmentRangeForBox(*this, box, *fragmentedFlow)) |
| 2818 | return false; |
| 2819 | |
| 2820 | RenderFragmentContainer* startFragment = nullptr; |
| 2821 | RenderFragmentContainer* endFragment = nullptr; |
| 2822 | fragmentedFlow->getFragmentRangeForBox(box, startFragment, endFragment); |
| 2823 | |
| 2824 | computeFragmentRangeForBoxChild(box); |
| 2825 | |
| 2826 | RenderFragmentContainer* newStartFragment = nullptr; |
| 2827 | RenderFragmentContainer* newEndFragment = nullptr; |
| 2828 | fragmentedFlow->getFragmentRangeForBox(box, newStartFragment, newEndFragment); |
| 2829 | |
| 2830 | |
| 2831 | // Changing the start fragment means we shift everything and a relayout is needed. |
| 2832 | if (newStartFragment != startFragment) |
| 2833 | return true; |
| 2834 | |
| 2835 | // The fragment range of the box has changed. Some boxes (e.g floats) may have been positioned assuming |
| 2836 | // a different range. |
| 2837 | if (box.needsLayoutAfterFragmentRangeChange() && newEndFragment != endFragment) |
| 2838 | return true; |
| 2839 | |
| 2840 | return false; |
| 2841 | } |
| 2842 | |
| 2843 | void RenderBlock::setTrimmedMarginForChild(RenderBox& child, Style::MarginTrimSide side) |
| 2844 | { |
| 2845 | switch (side) { |
| 2846 | case Style::MarginTrimSide::BlockStart: |
| 2847 | setMarginBeforeForChild(child, 0_lu); |
| 2848 | break; |
| 2849 | case Style::MarginTrimSide::BlockEnd: |
| 2850 | setMarginAfterForChild(child, 0_lu); |
| 2851 | break; |
| 2852 | case Style::MarginTrimSide::InlineStart: |
| 2853 | setMarginStartForChild(child, 0_lu); |
| 2854 | break; |
| 2855 | case Style::MarginTrimSide::InlineEnd: |
| 2856 | setMarginEndForChild(child, 0_lu); |
| 2857 | break; |
| 2858 | default: |
| 2859 | ASSERT_NOT_IMPLEMENTED_YET()((void)0); |
| 2860 | } |
| 2861 | |
| 2862 | child.markMarginAsTrimmed(side); |
| 2863 | } |
| 2864 | |
| 2865 | LayoutUnit RenderBlock::collapsedMarginBeforeForChild(const RenderBox& child) const |
| 2866 | { |
| 2867 | // If the child has the same directionality as we do, then we can just return its |
| 2868 | // collapsed margin. |
| 2869 | if (!child.isWritingModeRoot()) |
| 2870 | return child.collapsedMarginBefore(); |
| 2871 | |
| 2872 | // The child has a different directionality. If the child is parallel, then it's just |
| 2873 | // flipped relative to us. We can use the collapsed margin for the opposite edge. |
| 2874 | if (child.isHorizontalWritingMode() == isHorizontalWritingMode()) |
| 2875 | return child.collapsedMarginAfter(); |
| 2876 | |
| 2877 | // The child is perpendicular to us, which means its margins don't collapse but are on the |
| 2878 | // "logical left/right" sides of the child box. We can just return the raw margin in this case. |
| 2879 | return marginBeforeForChild(child); |
| 2880 | } |
| 2881 | |
| 2882 | LayoutUnit RenderBlock::collapsedMarginAfterForChild(const RenderBox& child) const |
| 2883 | { |
| 2884 | // If the child has the same directionality as we do, then we can just return its |
| 2885 | // collapsed margin. |
| 2886 | if (!child.isWritingModeRoot()) |
| 2887 | return child.collapsedMarginAfter(); |
| 2888 | |
| 2889 | // The child has a different directionality. If the child is parallel, then it's just |
| 2890 | // flipped relative to us. We can use the collapsed margin for the opposite edge. |
| 2891 | if (child.isHorizontalWritingMode() == isHorizontalWritingMode()) |
| 2892 | return child.collapsedMarginBefore(); |
| 2893 | |
| 2894 | // The child is perpendicular to us, which means its margins don't collapse but are on the |
| 2895 | // "logical left/right" side of the child box. We can just return the raw margin in this case. |
| 2896 | return marginAfterForChild(child); |
| 2897 | } |
| 2898 | |
| 2899 | bool RenderBlock::hasMarginBeforeQuirk(const RenderBox& child) const |
| 2900 | { |
| 2901 | // If the child has the same directionality as we do, then we can just return its |
| 2902 | // margin quirk. |
| 2903 | if (!child.isWritingModeRoot()) { |
| 2904 | auto* childBlock = dynamicDowncast<RenderBlock>(child); |
| 2905 | return childBlock ? childBlock->hasMarginBeforeQuirk() : child.style().marginBefore().hasQuirk(); |
| 2906 | } |
| 2907 | |
| 2908 | // The child has a different directionality. If the child is parallel, then it's just |
| 2909 | // flipped relative to us. We can use the opposite edge. |
| 2910 | if (child.isHorizontalWritingMode() == isHorizontalWritingMode()) { |
| 2911 | auto* childBlock = dynamicDowncast<RenderBlock>(child); |
| 2912 | return childBlock ? childBlock->hasMarginAfterQuirk() : child.style().marginAfter().hasQuirk(); |
| 2913 | } |
| 2914 | |
| 2915 | // The child is perpendicular to us and box sides are never quirky in html.css, and we don't really care about |
| 2916 | // whether or not authors specified quirky ems, since they're an implementation detail. |
| 2917 | return false; |
| 2918 | } |
| 2919 | |
| 2920 | bool RenderBlock::hasMarginAfterQuirk(const RenderBox& child) const |
| 2921 | { |
| 2922 | // If the child has the same directionality as we do, then we can just return its |
| 2923 | // margin quirk. |
| 2924 | if (!child.isWritingModeRoot()) { |
| 2925 | auto* childBlock = dynamicDowncast<RenderBlock>(child); |
| 2926 | return childBlock ? childBlock->hasMarginAfterQuirk() : child.style().marginAfter().hasQuirk(); |
| 2927 | } |
| 2928 | |
| 2929 | // The child has a different directionality. If the child is parallel, then it's just |
| 2930 | // flipped relative to us. We can use the opposite edge. |
| 2931 | if (child.isHorizontalWritingMode() == isHorizontalWritingMode()) { |
| 2932 | auto* childBlock = dynamicDowncast<RenderBlock>(child); |
| 2933 | return childBlock ? childBlock->hasMarginBeforeQuirk() : child.style().marginBefore().hasQuirk(); |
| 2934 | } |
| 2935 | |
| 2936 | // The child is perpendicular to us and box sides are never quirky in html.css, and we don't really care about |
| 2937 | // whether or not authors specified quirky ems, since they're an implementation detail. |
| 2938 | return false; |
| 2939 | } |
| 2940 | |
| 2941 | ASCIILiteral RenderBlock::renderName() const |
| 2942 | { |
| 2943 | if (isBody()) |
| 2944 | return "RenderBody"_s; // FIXME: Temporary hack until we know that the regression tests pass. |
| 2945 | if (isFieldset()) |
| 2946 | return "RenderFieldSet"_s; // FIXME: Remove eventually, but done to keep tests from breaking. |
| 2947 | if (isFloating()) |
| 2948 | return "RenderBlock (floating)"_s; |
| 2949 | if (isOutOfFlowPositioned()) |
| 2950 | return "RenderBlock (positioned)"_s; |
| 2951 | if (isAnonymousBlock()) |
| 2952 | return "RenderBlock (anonymous)"_s; |
| 2953 | // FIXME: Temporary hack while the new generated content system is being implemented. |
| 2954 | if (isPseudoElement()) |
| 2955 | return "RenderBlock (generated)"_s; |
| 2956 | if (isAnonymous()) |
| 2957 | return "RenderBlock (generated)"_s; |
| 2958 | if (isRelativelyPositioned()) |
| 2959 | return "RenderBlock (relative positioned)"_s; |
| 2960 | if (isStickilyPositioned()) |
| 2961 | return "RenderBlock (sticky positioned)"_s; |
| 2962 | return "RenderBlock"_s; |
| 2963 | } |
| 2964 | |
| 2965 | String RenderBlock::debugDescription() const |
| 2966 | { |
| 2967 | if (isViewTransitionPseudo()) { |
| 2968 | StringBuilder builder; |
| 2969 | |
| 2970 | builder.append(renderName(), " 0x"_s, hex(reinterpret_cast<uintptr_t>(this), Lowercase)); |
| 2971 | |
| 2972 | builder.append(" ::view-transition"_s); |
| 2973 | if (style().pseudoElementType() != PseudoElementType::ViewTransition) { |
| 2974 | builder.append("-"_s, style().pseudoElementType() == PseudoElementType::ViewTransitionGroup ? "group("_s : "image-pair("_s); |
| 2975 | builder.append(style().pseudoElementNameArgument(), ')'); |
| 2976 | } |
| 2977 | return builder.toString(); |
| 2978 | } |
| 2979 | |
| 2980 | return RenderObject::debugDescription(); |
| 2981 | } |
| 2982 | |
| 2983 | TextRun RenderBlock::constructTextRun(StringView stringView, const RenderStyle& style, ExpansionBehavior expansion, TextRunFlags flags) |
| 2984 | { |
| 2985 | auto textDirection = TextDirection::LTR; |
| 2986 | bool directionalOverride = style.rtlOrdering() == Order::Visual; |
| 2987 | if (flags != DefaultTextRunFlags) { |
| 2988 | if (flags & RespectDirection) |
| 2989 | textDirection = style.writingMode().bidiDirection(); |
| 2990 | if (flags & RespectDirectionOverride) |
| 2991 | directionalOverride |= isOverride(style.unicodeBidi()); |
| 2992 | } |
| 2993 | |
| 2994 | // This works because: |
| 2995 | // 1. TextRun owns its text string. Its member is a String, not a StringView |
| 2996 | // 2. This replacement doesn't affect string indices. We're replacing a single Unicode code unit with another Unicode code unit. |
| 2997 | // How convenient. |
| 2998 | auto updatedString = RenderBlock::updateSecurityDiscCharacters(style, stringView.toStringWithoutCopying()); |
| 2999 | return TextRun(WTF::move(updatedString), 0, 0, expansion, textDirection, directionalOverride); |
| 3000 | } |
| 3001 | |
| 3002 | TextRun RenderBlock::constructTextRun(const String& string, const RenderStyle& style, ExpansionBehavior expansion, TextRunFlags flags) |
| 3003 | { |
| 3004 | return constructTextRun(StringView(string), style, expansion, flags); |
| 3005 | } |
| 3006 | |
| 3007 | TextRun RenderBlock::constructTextRun(const AtomString& atomString, const RenderStyle& style, ExpansionBehavior expansion, TextRunFlags flags) |
| 3008 | { |
| 3009 | return constructTextRun(StringView(atomString), style, expansion, flags); |
| 3010 | } |
| 3011 | |
| 3012 | TextRun RenderBlock::constructTextRun(const RenderText& text, const RenderStyle& style, ExpansionBehavior expansion) |
| 3013 | { |
| 3014 | return constructTextRun(text.stringView(), style, expansion); |
| 3015 | } |
| 3016 | |
| 3017 | TextRun RenderBlock::constructTextRun(const RenderText& text, unsigned offset, unsigned length, const RenderStyle& style, ExpansionBehavior expansion) |
| 3018 | { |
| 3019 | unsigned stop = offset + length; |
| 3020 | ASSERT(stop <= text.text().length())((void)0); |
| 3021 | return constructTextRun(text.stringView(offset, stop), style, expansion); |
| 3022 | } |
| 3023 | |
| 3024 | TextRun RenderBlock::constructTextRun(std::span<const Latin1Character> characters, const RenderStyle& style, ExpansionBehavior expansion) |
| 3025 | { |
| 3026 | return constructTextRun(StringView { characters }, style, expansion); |
| 3027 | } |
| 3028 | |
| 3029 | TextRun RenderBlock::constructTextRun(std::span<const char16_t> characters, const RenderStyle& style, ExpansionBehavior expansion) |
| 3030 | { |
| 3031 | return constructTextRun(StringView { characters }, style, expansion); |
| 3032 | } |
| 3033 | |
| 3034 | bool RenderBlock::hasDefiniteLogicalHeight() const |
| 3035 | { |
| 3036 | return (bool)availableLogicalHeightForPercentageComputation(); |
| 3037 | } |
| 3038 | |
| 3039 | std::optional<LayoutUnit> RenderBlock::availableLogicalHeightForPercentageComputation() const |
| 3040 | { |
| 3041 | // For anonymous blocks that are skipped during percentage height calculation, |
| 3042 | // we consider them to have an indefinite height. |
| 3043 | if (skipContainingBlockForPercentHeightCalculation(*this, false)) |
| 3044 | return { }; |
| 3045 | |
| 3046 | auto availableHeight = [&]() -> std::optional<LayoutUnit> { |
| 3047 | if (auto overridingLogicalHeightForFlex = (isFlexItem() ? downcast<RenderFlexibleBox>(parent())->usedFlexItemOverridingLogicalHeightForPercentageResolution(*this) : std::nullopt)) |
| 3048 | return contentBoxLogicalHeight(*overridingLogicalHeightForFlex); |
| 3049 | |
| 3050 | if (auto overridingLogicalHeightForGrid = (isGridItem() ? overridingBorderBoxLogicalHeight() : std::nullopt)) |
| 3051 | return contentBoxLogicalHeight(*overridingLogicalHeightForGrid); |
| 3052 | |
| 3053 | auto& style = this->style(); |
| 3054 | if (auto fixedLogicalHeight = style.logicalHeight().tryFixed()) { |
| 3055 | auto contentBoxHeight = adjustContentBoxLogicalHeightForBoxSizing(LayoutUnit { fixedLogicalHeight->resolveZoom(style.usedZoomForLength()) }); |
| 3056 | return std::max(0_lu, constrainContentBoxLogicalHeightByMinMax(contentBoxHeight - scrollbarLogicalHeight(), { })); |
| 3057 | } |
| 3058 | |
| 3059 | if (shouldComputeLogicalHeightFromAspectRatio()) { |
| 3060 | // Only grid is expected to be in a state where it is calculating pref width and having unknown logical width. |
| 3061 | if (isRenderGrid() && needsPreferredLogicalWidthsUpdate() && !style.logicalWidth().isSpecified()) |
| 3062 | return { }; |
| 3063 | return blockSizeFromAspectRatio( |
| 3064 | horizontalBorderAndPaddingExtent(), |
| 3065 | verticalBorderAndPaddingExtent(), |
| 3066 | LayoutUnit { style.logicalAspectRatio() }, |
| 3067 | style.boxSizingForAspectRatio(), |
| 3068 | logicalWidth(), |
| 3069 | style.aspectRatio(), |
| 3070 | isRenderReplaced() |
| 3071 | ); |
| 3072 | } |
| 3073 | |
| 3074 | // A positioned element that specified both top/bottom or that specifies |
| 3075 | // height should be treated as though it has a height explicitly specified |
| 3076 | // that can be used for any percentage computations. |
| 3077 | // However, intrinsic heights (fit-content, min-content, max-content) are |
| 3078 | // content-dependent and should be treated as indefinite for percentage |
| 3079 | // resolution of children, since the actual height is not yet determined. |
| 3080 | auto heightIsIntrinsic = style.logicalHeight().isIntrinsic() || style.logicalHeight().isLegacyIntrinsic(); |
| 3081 | auto hasNonIntrinsicSpecifiedHeight = !style.logicalHeight().isAuto() && !heightIsIntrinsic; |
| 3082 | auto hasDefiniteHeightFromInsets = !style.logicalTop().isAuto() && !style.logicalBottom().isAuto() && style.logicalHeight().isAuto(); |
| 3083 | auto isOutOfFlowPositionedWithSpecifiedHeight = isOutOfFlowPositioned() && (hasNonIntrinsicSpecifiedHeight || hasDefiniteHeightFromInsets); |
| 3084 | if (isOutOfFlowPositionedWithSpecifiedHeight) { |
| 3085 | // Don't allow this to affect the block' size() member variable, since this |
| 3086 | // can get called while the block is still laying out its kids. |
| 3087 | return std::max(0_lu, computeLogicalHeight(logicalHeight(), 0_lu).extent - borderAndPaddingLogicalHeight() - scrollbarLogicalHeight()); |
| 3088 | } |
| 3089 | |
| 3090 | if (style.logicalHeight().isPercentOrCalculated()) { |
| 3091 | if (auto heightWithScrollbar = computePercentageLogicalHeight(style.logicalHeight())) { |
| 3092 | auto contentBoxHeightWithScrollbar = adjustContentBoxLogicalHeightForBoxSizing(*heightWithScrollbar); |
| 3093 | // We need to adjust for min/max height because this method does not handle the min/max of the current block, its caller does. |
| 3094 | // So the return value from the recursive call will not have been adjusted yet. |
| 3095 | return std::max(0_lu, constrainContentBoxLogicalHeightByMinMax(contentBoxHeightWithScrollbar - scrollbarLogicalHeight(), { })); |
| 3096 | } |
| 3097 | return { }; |
| 3098 | } |
| 3099 | |
| 3100 | if (isRenderView()) |
| 3101 | return view().pageOrViewLogicalHeight(); |
| 3102 | |
| 3103 | return { }; |
| 3104 | }; |
| 3105 | return availableHeight(); |
| 3106 | } |
| 3107 | |
| 3108 | void RenderBlock::layoutExcludedChildren(RelayoutChildren relayoutChildren) |
| 3109 | { |
| 3110 | if (!isFieldset()) |
| 3111 | return; |
| 3112 | |
| 3113 | setIntrinsicBorderForFieldset(0); |
| 3114 | |
| 3115 | RenderBox* box = findFieldsetLegend(); |
| 3116 | if (!box) |
| 3117 | return; |
| 3118 | |
| 3119 | box->setIsExcludedFromNormalLayout(true); |
| 3120 | for (auto& child : childrenOfType<RenderBox>(*this)) { |
| 3121 | if (&child == box || !child.isLegend()) |
| 3122 | continue; |
| 3123 | child.setIsExcludedFromNormalLayout(false); |
| 3124 | } |
| 3125 | |
| 3126 | RenderBox& legend = *box; |
| 3127 | if (relayoutChildren == RelayoutChildren::Yes) |
| 3128 | legend.setChildNeedsLayout(MarkOnlyThis); |
| 3129 | legend.layoutIfNeeded(); |
| 3130 | |
| 3131 | LayoutUnit logicalLeft; |
| 3132 | if (writingMode().isBidiLTR()) { |
| 3133 | switch (legend.style().textAlign()) { |
| 3134 | case Style::TextAlign::Center: |
| 3135 | logicalLeft = (logicalWidth() - logicalWidthForChild(legend)) / 2; |
| 3136 | break; |
| 3137 | case Style::TextAlign::Right: |
| 3138 | logicalLeft = logicalWidth() - borderAndPaddingEnd() - logicalWidthForChild(legend); |
| 3139 | break; |
| 3140 | default: |
| 3141 | logicalLeft = borderAndPaddingStart() + marginStartForChild(legend); |
| 3142 | break; |
| 3143 | } |
| 3144 | } else { |
| 3145 | switch (legend.style().textAlign()) { |
| 3146 | case Style::TextAlign::Left: |
| 3147 | logicalLeft = borderAndPaddingStart(); |
| 3148 | break; |
| 3149 | case Style::TextAlign::Center: { |
| 3150 | // Make sure that the extra pixel goes to the end side in RTL (since it went to the end side |
| 3151 | // in LTR). |
| 3152 | LayoutUnit centeredWidth = logicalWidth() - logicalWidthForChild(legend); |
| 3153 | logicalLeft = centeredWidth - centeredWidth / 2; |
| 3154 | break; |
| 3155 | } |
| 3156 | default: |
| 3157 | logicalLeft = logicalWidth() - borderAndPaddingStart() - marginStartForChild(legend) - logicalWidthForChild(legend); |
| 3158 | break; |
| 3159 | } |
| 3160 | } |
| 3161 | |
| 3162 | setLogicalLeftForChild(legend, logicalLeft); |
| 3163 | |
| 3164 | LayoutUnit fieldsetBorderBefore = borderBefore(); |
| 3165 | LayoutUnit legendLogicalHeight = logicalHeightForChild(legend); |
| 3166 | LayoutUnit legendAfterMargin = marginAfterForChild(legend); |
| 3167 | LayoutUnit topPositionForLegend = std::max(0_lu, (fieldsetBorderBefore - legendLogicalHeight) / 2); |
| 3168 | LayoutUnit bottomPositionForLegend = topPositionForLegend + legendLogicalHeight + legendAfterMargin; |
| 3169 | |
| 3170 | // Place the legend now. |
| 3171 | setLogicalTopForChild(legend, topPositionForLegend); |
| 3172 | |
| 3173 | // If the bottom of the legend (including its after margin) is below the fieldset border, |
| 3174 | // then we need to add in sufficient intrinsic border to account for this gap. |
| 3175 | // FIXME: Should we support the before margin of the legend? Not entirely clear. |
| 3176 | // FIXME: Consider dropping support for the after margin of the legend. Not sure other |
| 3177 | // browsers support that anyway. |
| 3178 | if (bottomPositionForLegend > fieldsetBorderBefore) |
| 3179 | setIntrinsicBorderForFieldset(bottomPositionForLegend - fieldsetBorderBefore); |
| 3180 | |
| 3181 | // Now that the legend is included in the border extent, we can set our logical height |
| 3182 | // to the borderBefore (which includes the legend and its after margin if they were bigger |
| 3183 | // than the actual fieldset border) and then add in our padding before. |
| 3184 | setLogicalHeight(borderAndPaddingBefore()); |
| 3185 | } |
| 3186 | |
| 3187 | RenderBox* RenderBlock::findFieldsetLegend(FieldsetFindLegendOption option) const |
| 3188 | { |
| 3189 | if (isSkippedContentRoot(*this)) |
| 3190 | return { }; |
| 3191 | |
| 3192 | for (auto& legend : childrenOfType<RenderBox>(*this)) { |
| 3193 | if (option == FieldsetIgnoreFloatingOrOutOfFlow && legend.isFloatingOrOutOfFlowPositioned()) |
| 3194 | continue; |
| 3195 | if (legend.isLegend()) |
| 3196 | return const_cast<RenderBox*>(&legend); |
| 3197 | } |
| 3198 | return { }; |
| 3199 | } |
| 3200 | |
| 3201 | void RenderBlock::adjustBorderBoxRectForPainting(LayoutRect& paintRect) |
| 3202 | { |
| 3203 | if (!isFieldset() || !intrinsicBorderForFieldset()) |
| 3204 | return; |
| 3205 | |
| 3206 | auto* legend = findFieldsetLegend(); |
| 3207 | if (!legend) |
| 3208 | return; |
| 3209 | |
| 3210 | if (writingMode().isHorizontal()) { |
| 3211 | LayoutUnit yOff = std::max(0_lu, (legend->height() - RenderBox::borderBefore()) / 2); |
| 3212 | paintRect.setHeight(paintRect.height() - yOff); |
| 3213 | if (writingMode().isBlockTopToBottom()) |
| 3214 | paintRect.setY(paintRect.y() + yOff); |
| 3215 | } else { |
| 3216 | LayoutUnit xOff = std::max(0_lu, (legend->width() - RenderBox::borderBefore()) / 2); |
| 3217 | paintRect.setWidth(paintRect.width() - xOff); |
| 3218 | if (writingMode().isBlockLeftToRight()) |
| 3219 | paintRect.setX(paintRect.x() + xOff); |
| 3220 | } |
| 3221 | } |
| 3222 | |
| 3223 | LayoutRect RenderBlock::paintRectToClipOutFromBorder(const LayoutRect& paintRect) |
| 3224 | { |
| 3225 | LayoutRect clipRect; |
| 3226 | if (!isFieldset()) |
| 3227 | return clipRect; |
| 3228 | auto* legend = findFieldsetLegend(); |
| 3229 | if (!legend) |
| 3230 | return clipRect; |
| 3231 | |
| 3232 | LayoutUnit borderExtent = RenderBox::borderBefore(); |
| 3233 | if (writingMode().isHorizontal()) { |
| 3234 | clipRect.setX(paintRect.x() + legend->x()); |
| 3235 | clipRect.setY(writingMode().isBlockTopToBottom() ? paintRect.y() : paintRect.y() + paintRect.height() - borderExtent); |
| 3236 | clipRect.setWidth(legend->width()); |
| 3237 | clipRect.setHeight(borderExtent); |
| 3238 | } else { |
| 3239 | clipRect.setX(writingMode().isBlockLeftToRight() ? paintRect.x() : paintRect.x() + paintRect.width() - borderExtent); |
| 3240 | clipRect.setY(paintRect.y() + legend->y()); |
| 3241 | clipRect.setWidth(borderExtent); |
| 3242 | clipRect.setHeight(legend->height()); |
| 3243 | } |
| 3244 | return clipRect; |
| 3245 | } |
| 3246 | |
| 3247 | LayoutUnit RenderBlock::intrinsicBorderForFieldset() const |
| 3248 | { |
| 3249 | auto* rareData = blockRareData(); |
| 3250 | return rareData ? rareData->m_intrinsicBorderForFieldset : 0_lu; |
| 3251 | } |
| 3252 | |
| 3253 | void RenderBlock::setIntrinsicBorderForFieldset(LayoutUnit padding) |
| 3254 | { |
| 3255 | auto* rareData = blockRareData(); |
| 3256 | if (!rareData) { |
| 3257 | if (!padding) |
| 3258 | return; |
| 3259 | rareData = &ensureBlockRareData(); |
| 3260 | } |
| 3261 | rareData->m_intrinsicBorderForFieldset = padding; |
| 3262 | } |
| 3263 | |
| 3264 | RectEdges<LayoutUnit> RenderBlock::borderWidths() const |
| 3265 | { |
| 3266 | if (!intrinsicBorderForFieldset()) |
| 3267 | return RenderBox::borderWidths(); |
| 3268 | |
| 3269 | return { |
| 3270 | borderTop(), |
| 3271 | borderRight(), |
| 3272 | borderBottom(), |
| 3273 | borderLeft() |
| 3274 | }; |
| 3275 | } |
| 3276 | |
| 3277 | LayoutUnit RenderBlock::borderTop() const |
| 3278 | { |
| 3279 | if (!writingMode().isBlockTopToBottom() || !intrinsicBorderForFieldset()) |
| 3280 | return RenderBox::borderTop(); |
| 3281 | return RenderBox::borderTop() + intrinsicBorderForFieldset(); |
| 3282 | } |
| 3283 | |
| 3284 | LayoutUnit RenderBlock::borderLeft() const |
| 3285 | { |
| 3286 | if (!writingMode().isBlockLeftToRight() || !intrinsicBorderForFieldset()) |
| 3287 | return RenderBox::borderLeft(); |
| 3288 | return RenderBox::borderLeft() + intrinsicBorderForFieldset(); |
| 3289 | } |
| 3290 | |
| 3291 | LayoutUnit RenderBlock::borderBottom() const |
| 3292 | { |
| 3293 | if (writingMode().blockDirection() != FlowDirection::BottomToTop || !intrinsicBorderForFieldset()) |
| 3294 | return RenderBox::borderBottom(); |
| 3295 | return RenderBox::borderBottom() + intrinsicBorderForFieldset(); |
| 3296 | } |
| 3297 | |
| 3298 | LayoutUnit RenderBlock::borderRight() const |
| 3299 | { |
| 3300 | if (writingMode().blockDirection() != FlowDirection::RightToLeft || !intrinsicBorderForFieldset()) |
| 3301 | return RenderBox::borderRight(); |
| 3302 | return RenderBox::borderRight() + intrinsicBorderForFieldset(); |
| 3303 | } |
| 3304 | |
| 3305 | LayoutUnit RenderBlock::borderBefore() const |
| 3306 | { |
| 3307 | return RenderBox::borderBefore() + intrinsicBorderForFieldset(); |
| 3308 | } |
| 3309 | |
| 3310 | bool RenderBlock::computePreferredWidthsForExcludedChildren(LayoutUnit& minWidth, LayoutUnit& maxWidth) const |
| 3311 | { |
| 3312 | if (!isFieldset()) |
| 3313 | return false; |
| 3314 | |
| 3315 | auto* legend = findFieldsetLegend(); |
| 3316 | if (!legend) |
| 3317 | return false; |
| 3318 | |
| 3319 | legend->setIsExcludedFromNormalLayout(true); |
| 3320 | |
| 3321 | computeChildPreferredLogicalWidths(*legend, minWidth, maxWidth); |
| 3322 | |
| 3323 | // These are going to be added in later, so we subtract them out to reflect the |
| 3324 | // fact that the legend is outside the scrollable area. |
| 3325 | auto scrollbarWidth = intrinsicScrollbarLogicalWidthIncludingGutter(); |
| 3326 | minWidth -= scrollbarWidth; |
| 3327 | maxWidth -= scrollbarWidth; |
| 3328 | |
| 3329 | const auto& childStyle = legend->style(); |
| 3330 | const auto& childZoomFactor = childStyle.usedZoomForLength(); |
| 3331 | |
| 3332 | LayoutUnit marginStart; |
| 3333 | LayoutUnit marginEnd; |
| 3334 | if (auto fixedMarginStart = childStyle.marginStart(writingMode()).tryFixed()) |
| 3335 | marginStart += fixedMarginStart->resolveZoom(childZoomFactor); |
| 3336 | if (auto fixedMarginEnd = childStyle.marginEnd(writingMode()).tryFixed()) |
| 3337 | marginEnd += fixedMarginEnd->resolveZoom(childZoomFactor); |
| 3338 | |
| 3339 | auto margin = marginStart + marginEnd; |
| 3340 | |
| 3341 | minWidth += margin; |
| 3342 | maxWidth += margin; |
| 3343 | |
| 3344 | return true; |
| 3345 | } |
| 3346 | |
| 3347 | LayoutUnit RenderBlock::adjustBorderBoxLogicalHeightForBoxSizing(LayoutUnit height) const |
| 3348 | { |
| 3349 | // FIXME: We're doing this to match other browsers even though it's questionable. |
| 3350 | // Shouldn't height:100px mean the fieldset content gets 100px of height even if the |
| 3351 | // resulting fieldset becomes much taller because of the legend? |
| 3352 | LayoutUnit bordersPlusPadding = borderAndPaddingLogicalHeight(); |
| 3353 | if (style().boxSizing() == BoxSizing::ContentBox) |
| 3354 | return height + bordersPlusPadding - intrinsicBorderForFieldset(); |
| 3355 | return std::max(height, bordersPlusPadding); |
| 3356 | } |
| 3357 | |
| 3358 | LayoutUnit RenderBlock::adjustContentBoxLogicalHeightForBoxSizing(std::optional<LayoutUnit> height) const |
| 3359 | { |
| 3360 | // FIXME: We're doing this to match other browsers even though it's questionable. |
| 3361 | // Shouldn't height:100px mean the fieldset content gets 100px of height even if the |
| 3362 | // resulting fieldset becomes much taller because of the legend? |
| 3363 | if (!height) |
| 3364 | return 0; |
| 3365 | LayoutUnit result = height.value(); |
| 3366 | if (style().boxSizing() == BoxSizing::BorderBox) |
| 3367 | result -= borderAndPaddingLogicalHeight(); |
| 3368 | else |
| 3369 | result -= intrinsicBorderForFieldset(); |
| 3370 | return std::max(0_lu, result); |
| 3371 | } |
| 3372 | |
| 3373 | LayoutUnit RenderBlock::adjustIntrinsicLogicalHeightForBoxSizing(LayoutUnit height) const |
| 3374 | { |
| 3375 | if (style().boxSizing() == BoxSizing::BorderBox) |
| 3376 | return height + borderAndPaddingLogicalHeight(); |
| 3377 | return height + intrinsicBorderForFieldset(); |
| 3378 | } |
| 3379 | |
| 3380 | void RenderBlock::paintExcludedChildrenInBorder(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| 3381 | { |
| 3382 | if (!isFieldset()) |
| 3383 | return; |
| 3384 | |
| 3385 | RenderBox* box = findFieldsetLegend(); |
| 3386 | if (!box || !box->isExcludedFromNormalLayout() || box->hasSelfPaintingLayer()) |
| 3387 | return; |
| 3388 | |
| 3389 | LayoutPoint childPoint = flipForWritingModeForChild(*box, paintOffset); |
| 3390 | box->paintAsInlineBlock(paintInfo, childPoint); |
| 3391 | } |
| 3392 | |
| 3393 | bool RenderBlock::hitTestExcludedChildrenInBorder(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction) |
| 3394 | { |
| 3395 | if (!isFieldset()) |
| 3396 | return false; |
| 3397 | |
| 3398 | auto* legend = findFieldsetLegend(); |
| 3399 | if (!legend || !legend->isExcludedFromNormalLayout() || legend->hasSelfPaintingLayer()) |
| 3400 | return false; |
| 3401 | |
| 3402 | HitTestAction childHitTest = hitTestAction; |
| 3403 | if (hitTestAction == HitTestChildBlockBackgrounds) |
| 3404 | childHitTest = HitTestChildBlockBackground; |
| 3405 | LayoutPoint childPoint = flipForWritingModeForChild(*legend, accumulatedOffset); |
| 3406 | return legend->nodeAtPoint(request, result, locationInContainer, childPoint, childHitTest); |
| 3407 | } |
| 3408 | |
| 3409 | String RenderBlock::updateSecurityDiscCharacters(const RenderStyle& style, String&& string) |
| 3410 | { |
| 3411 | #if !PLATFORM(COCOA)(defined 1 && 1) |
| 3412 | UNUSED_PARAM(style)(void)style; |
| 3413 | return WTF::move(string); |
| 3414 | #else |
| 3415 | if (style.textSecurity() == TextSecurity::None) |
| 3416 | return WTF::move(string); |
| 3417 | // This PUA character in the system font is used to render password field dots on Cocoa platforms. |
| 3418 | constexpr char16_t textSecurityDiscPUACodePoint = 0xF79A; |
| 3419 | Ref font = style.fontCascade().primaryFont(); |
| 3420 | if (!(font->platformData().isSystemFont() && font->glyphForCharacter(textSecurityDiscPUACodePoint))) |
| 3421 | return WTF::move(string); |
| 3422 | |
| 3423 | // See RenderText::setRenderedText() |
| 3424 | #if PLATFORM(IOS_FAMILY)(defined 1 && 1) |
| 3425 | constexpr char16_t discCharacterToReplace = blackCircle; |
| 3426 | #else |
| 3427 | constexpr char16_t discCharacterToReplace = bullet; |
| 3428 | #endif |
| 3429 | |
| 3430 | return makeStringByReplacingAll(string, discCharacterToReplace, textSecurityDiscPUACodePoint); |
| 3431 | #endif |
| 3432 | } |
| 3433 | |
| 3434 | LayoutUnit RenderBlock::layoutOverflowLogicalBottom(const RenderBlock& renderer) |
| 3435 | { |
| 3436 | ASSERT(is<RenderGrid>(renderer) || is<RenderFlexibleBox>(renderer))((void)0); |
| 3437 | auto maxChildLogicalBottom = LayoutUnit { }; |
| 3438 | for (auto& child : childrenOfType<RenderBox>(renderer)) { |
| 3439 | if (child.isOutOfFlowPositioned()) |
| 3440 | continue; |
| 3441 | auto childLogicalBottom = renderer.logicalTopForChild(child) + renderer.logicalHeightForChild(child) + renderer.marginAfterForChild(child); |
| 3442 | maxChildLogicalBottom = std::max(maxChildLogicalBottom, childLogicalBottom); |
| 3443 | } |
| 3444 | return std::max(renderer.clientLogicalBottom(), maxChildLogicalBottom + renderer.paddingAfter()); |
| 3445 | } |
| 3446 | |
| 3447 | void RenderBlock::updateInFlowDescendantTransformsAfterLayout() |
| 3448 | { |
| 3449 | auto boxes = view().frameView().layoutContext().takeBoxesNeedingTransformUpdateAfterContainerLayout(*this); |
| 3450 | for (auto& box : boxes) { |
| 3451 | if (box && box->hasLayer() && !box->isOutOfFlowPositioned()) |
| 3452 | box->layer()->updateTransform(); |
| 3453 | } |
| 3454 | } |
| 3455 | |
| 3456 | void RenderBlock::updateOutOfFlowDescendantTransformsAfterLayout() |
| 3457 | { |
| 3458 | auto boxes = view().frameView().layoutContext().takeBoxesNeedingTransformUpdateAfterContainerLayout(*this); |
| 3459 | for (auto& box : boxes) { |
| 3460 | if (box && box->hasLayer() && box->isOutOfFlowPositioned()) |
| 3461 | box->layer()->updateTransform(); |
| 3462 | } |
| 3463 | } |
| 3464 | |
| 3465 | } // namespace WebCore |