| File: | Volumes/Data/worker/macOS-Safer-CPP-Checks-EWS/build/Source/WebCore/rendering/RenderReplaced.cpp |
| Warning: | line 991, column 11 Local variable 'frameView' is uncounted and unsafe |
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| 1 | /* |
| 2 | * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| 3 | * Copyright (C) 2000 Dirk Mueller (mueller@kde.org) |
| 4 | * Copyright (C) 2004-2025 Apple Inc. All rights reserved. |
| 5 | * Copyright (C) 2018 Google Inc. All rights reserved. |
| 6 | * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved. |
| 7 | * |
| 8 | * This library is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Library General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This library is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Library General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Library General Public License |
| 19 | * along with this library; see the file COPYING.LIB. If not, write to |
| 20 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 21 | * Boston, MA 02110-1301, USA. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include "config.h" |
| 26 | #include "RenderReplaced.h" |
| 27 | |
| 28 | #include "BackgroundPainter.h" |
| 29 | #include "BorderShape.h" |
| 30 | #include "DocumentMarkerController.h" |
| 31 | #include "ElementRuleCollector.h" |
| 32 | #include "FloatRoundedRect.h" |
| 33 | #include "GraphicsContext.h" |
| 34 | #include "HTMLElement.h" |
| 35 | #include "HTMLImageElement.h" |
| 36 | #include "HTMLParserIdioms.h" |
| 37 | #include "HighlightRegistry.h" |
| 38 | #include "InlineIteratorBox.h" |
| 39 | #include "InlineIteratorLineBoxInlines.h" |
| 40 | #include "LayoutRepainter.h" |
| 41 | #include "LineSelection.h" |
| 42 | #include "LocalFrame.h" |
| 43 | #include "PositionedLayoutConstraints.h" |
| 44 | #include "PaintInfoInlines.h" |
| 45 | #include "RenderBlock.h" |
| 46 | #include "RenderBoxInlines.h" |
| 47 | #include "RenderChildIterator.h" |
| 48 | #include "RenderElementStyleInlines.h" |
| 49 | #include "RenderFlexibleBox.h" |
| 50 | #include "RenderFragmentedFlow.h" |
| 51 | #include "RenderHTMLCanvas.h" |
| 52 | #include "RenderHighlight.h" |
| 53 | #include "RenderImage.h" |
| 54 | #include "RenderLayer.h" |
| 55 | #include "RenderLayoutState.h" |
| 56 | #include "RenderObjectInlines.h" |
| 57 | #include "RenderStyle+GettersInlines.h" |
| 58 | #include "RenderTheme.h" |
| 59 | #include "RenderVideo.h" |
| 60 | #include "RenderView.h" |
| 61 | #include "RenderedDocumentMarker.h" |
| 62 | #include "Settings.h" |
| 63 | #include "StyleComputedStyle+InitialInlines.h" |
| 64 | #include "StylePrimitiveNumericTypes+Evaluation.h" |
| 65 | #include "VisiblePosition.h" |
| 66 | #include <wtf/StackStats.h> |
| 67 | #include <wtf/TZoneMallocInlines.h> |
| 68 | #include <wtf/TypeCasts.h> |
| 69 | |
| 70 | namespace WebCore { |
| 71 | |
| 72 | WTF_MAKE_TZONE_ALLOCATED_IMPL(RenderReplaced)::bmalloc::api::HeapRef RenderReplaced::s_heapRef; const TZoneSpecification RenderReplaced::s_heapSpec = { &RenderReplaced::s_heapRef , TZoneSpecification::encodeSize<RenderReplaced>(), TZoneSpecification ::encodeAlignment<RenderReplaced>(), TZoneSpecification ::encodeCategory<RenderReplaced>(), ::bmalloc::api::compactAllocationMode <RenderReplaced>(), TZoneSpecification::encodeDescriptor <RenderReplaced>(), }; void* RenderReplaced::operatorNewSlow (size_t size) { if constexpr (::bmalloc::api::compactAllocationMode <RenderReplaced>() == CompactAllocationMode::Compact) return ::bmalloc::api::tzoneAllocateCompactSlow(size, s_heapSpec); return ::bmalloc::api::tzoneAllocateNonCompactSlow(size, s_heapSpec ); } using __makeBtzoneMallocedInlineMacroSemicolonifier __attribute__ ((unused)) = int; |
| 73 | |
| 74 | const int cDefaultWidth = 300; |
| 75 | const int cDefaultHeight = 150; |
| 76 | |
| 77 | RenderReplaced::RenderReplaced(Type type, Element& element, RenderStyle&& style, OptionSet<ReplacedFlag> flags) |
| 78 | : RenderBox(type, element, WTF::move(style), { }, flags) |
| 79 | , m_intrinsicSize(cDefaultWidth, cDefaultHeight) |
| 80 | { |
| 81 | ASSERT(element.isReplaced(&this->style()) || type == Type::Image)((void)0); |
| 82 | setBlockLevelReplacedOrAtomicInline(true); |
| 83 | ASSERT(isRenderReplaced())((void)0); |
| 84 | } |
| 85 | |
| 86 | RenderReplaced::RenderReplaced(Type type, Element& element, RenderStyle&& style, const LayoutSize& intrinsicSize, OptionSet<ReplacedFlag> flags) |
| 87 | : RenderBox(type, element, WTF::move(style), { }, flags) |
| 88 | , m_intrinsicSize(intrinsicSize) |
| 89 | { |
| 90 | ASSERT(element.isReplaced(&this->style()) || type == Type::Image)((void)0); |
| 91 | setBlockLevelReplacedOrAtomicInline(true); |
| 92 | ASSERT(isRenderReplaced())((void)0); |
| 93 | } |
| 94 | |
| 95 | RenderReplaced::RenderReplaced(Type type, Document& document, RenderStyle&& style, const LayoutSize& intrinsicSize, OptionSet<ReplacedFlag> flags) |
| 96 | : RenderBox(type, document, WTF::move(style), { }, flags) |
| 97 | , m_intrinsicSize(intrinsicSize) |
| 98 | { |
| 99 | setBlockLevelReplacedOrAtomicInline(true); |
| 100 | ASSERT(isRenderReplaced())((void)0); |
| 101 | } |
| 102 | |
| 103 | RenderReplaced::~RenderReplaced() = default; |
| 104 | |
| 105 | bool RenderReplaced::shouldRespectZeroIntrinsicWidth() const |
| 106 | { |
| 107 | // Per CSSWG resolution, 0px intrinsic width should be respected for SVG |
| 108 | // items and coerce the intrinsic height to 0px as well. Note that this is |
| 109 | // not the case for 0px intrinsic height SVGs or for other RenderReplaced items. |
| 110 | return false; |
| 111 | } |
| 112 | |
| 113 | void RenderReplaced::willBeDestroyed() |
| 114 | { |
| 115 | if (!renderTreeBeingDestroyed() && parent()) |
| 116 | parent()->dirtyLineFromChangedChild(); |
| 117 | |
| 118 | RenderBox::willBeDestroyed(); |
| 119 | } |
| 120 | |
| 121 | void RenderReplaced::styleDidChange(Style::Difference diff, const RenderStyle* oldStyle) |
| 122 | { |
| 123 | RenderBox::styleDidChange(diff, oldStyle); |
| 124 | auto previousUsedZoom = oldStyle ? oldStyle->usedZoom() : Style::evaluate<float>(Style::ComputedStyle::initialZoom()); |
| 125 | if (previousUsedZoom != style().usedZoom()) |
| 126 | intrinsicSizeChanged(); |
| 127 | } |
| 128 | |
| 129 | static bool shouldRepaintOnSizeChange(RenderReplaced& renderer) |
| 130 | { |
| 131 | if (is<RenderHTMLCanvas>(renderer)) |
| 132 | return true; |
| 133 | |
| 134 | #if ENABLE(VIDEO)(defined 1 && 1) |
| 135 | if (auto* renderImage = dynamicDowncast<RenderImage>(renderer); renderImage && !is<RenderMedia>(*renderImage) && !renderImage->isShowingMissingOrImageError()) |
| 136 | return true; |
| 137 | #endif |
| 138 | |
| 139 | return false; |
| 140 | } |
| 141 | |
| 142 | void RenderReplaced::layout() |
| 143 | { |
| 144 | StackStats::LayoutCheckPoint layoutCheckPoint; |
| 145 | ASSERT(needsLayout())((void)0); |
| 146 | |
| 147 | LayoutRepainter repainter(*this); |
| 148 | |
| 149 | LayoutRect oldContentRect = replacedContentRect(); |
| 150 | |
| 151 | setHeight(minimumReplacedHeight()); |
| 152 | |
| 153 | updateLogicalWidth(); |
| 154 | updateLogicalHeight(); |
| 155 | |
| 156 | clearOverflow(); |
| 157 | addVisualEffectOverflow(); |
| 158 | updateLayerTransform(); |
| 159 | invalidateBackgroundObscurationStatus(); |
| 160 | repainter.repaintAfterLayout(); |
| 161 | clearNeedsLayout(); |
| 162 | |
| 163 | if (replacedContentRect() != oldContentRect) { |
| 164 | setNeedsPreferredWidthsUpdate(); |
| 165 | if (shouldRepaintOnSizeChange(*this)) |
| 166 | repaint(); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | void RenderReplaced::intrinsicSizeChanged() |
| 171 | { |
| 172 | int scaledWidth = static_cast<int>(cDefaultWidth * style().usedZoom()); |
| 173 | int scaledHeight = static_cast<int>(cDefaultHeight * style().usedZoom()); |
| 174 | m_intrinsicSize = IntSize(scaledWidth, scaledHeight); |
| 175 | setNeedsLayoutAndPreferredWidthsUpdate(); |
| 176 | } |
| 177 | |
| 178 | bool RenderReplaced::shouldDrawSelectionTint() const |
| 179 | { |
| 180 | return selectionState() != HighlightState::None && !document().printing(); |
| 181 | } |
| 182 | |
| 183 | inline static bool contentContainsReplacedElement(const Vector<WeakPtr<RenderedDocumentMarker>>& markers, const Element& element) |
| 184 | { |
| 185 | for (auto& marker : markers) { |
| 186 | if (marker->type() == DocumentMarkerType::DraggedContent) { |
| 187 | if (std::get<RefPtr<Node>>(marker->data()) == &element) |
| 188 | return true; |
| 189 | } else if (marker->type() == DocumentMarkerType::TransparentContent) { |
| 190 | if (std::get<DocumentMarker::TransparentContentData>(marker->data()).node == &element) |
| 191 | return true; |
| 192 | } |
| 193 | } |
| 194 | return false; |
| 195 | } |
| 196 | |
| 197 | Color RenderReplaced::calculateHighlightColor() const |
| 198 | { |
| 199 | RenderHighlight renderHighlight; |
| 200 | #if ENABLE(APP_HIGHLIGHTS)(defined 1 && 1) |
| 201 | if (auto appHighlightRegistry = document().appHighlightRegistryIfExists()) { |
| 202 | if (appHighlightRegistry->highlightsVisibility() == HighlightVisibility::Visible) { |
| 203 | for (auto& highlight : appHighlightRegistry->map()) { |
| 204 | for (auto& highlightRange : highlight.value->highlightRanges()) { |
| 205 | if (!renderHighlight.setRenderRange(highlightRange)) |
| 206 | continue; |
| 207 | |
| 208 | auto state = renderHighlight.highlightStateForRenderer(*this); |
| 209 | if (!isHighlighted(state, renderHighlight)) |
| 210 | continue; |
| 211 | |
| 212 | OptionSet<StyleColorOptions> styleColorOptions = { StyleColorOptions::UseSystemAppearance }; |
| 213 | return theme().annotationHighlightBackgroundColor(styleColorOptions); |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | } |
| 218 | #endif |
| 219 | if (auto highlightRegistry = document().highlightRegistryIfExists()) { |
| 220 | for (auto& highlight : highlightRegistry->map()) { |
| 221 | for (auto& highlightRange : highlight.value->highlightRanges()) { |
| 222 | if (!renderHighlight.setRenderRange(highlightRange)) |
| 223 | continue; |
| 224 | |
| 225 | auto state = renderHighlight.highlightStateForRenderer(*this); |
| 226 | if (!isHighlighted(state, renderHighlight)) |
| 227 | continue; |
| 228 | |
| 229 | if (auto highlightStyle = getCachedPseudoStyle({ PseudoElementType::Highlight, highlight.key }, &style())) |
| 230 | return highlightStyle->backgroundColorResolvingCurrentColor(); |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | if (document().settings().scrollToTextFragmentEnabled()) { |
| 236 | if (auto highlightRegistry = document().fragmentHighlightRegistryIfExists()) { |
| 237 | for (auto& highlight : highlightRegistry->map()) { |
| 238 | for (auto& highlightRange : highlight.value->highlightRanges()) { |
| 239 | if (!renderHighlight.setRenderRange(highlightRange)) |
| 240 | continue; |
| 241 | |
| 242 | auto state = renderHighlight.highlightStateForRenderer(*this); |
| 243 | if (!isHighlighted(state, renderHighlight)) |
| 244 | continue; |
| 245 | |
| 246 | OptionSet<StyleColorOptions> styleColorOptions = { StyleColorOptions::UseSystemAppearance }; |
| 247 | return theme().annotationHighlightBackgroundColor(styleColorOptions); |
| 248 | } |
| 249 | } |
| 250 | } |
| 251 | } |
| 252 | return Color(); |
| 253 | } |
| 254 | |
| 255 | void RenderReplaced::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| 256 | { |
| 257 | if (!shouldPaint(paintInfo, paintOffset)) |
| 258 | return; |
| 259 | |
| 260 | LayoutPoint adjustedPaintOffset = paintOffset + location(); |
| 261 | |
| 262 | if (paintInfo.phase == PaintPhase::EventRegion) { |
| 263 | if (isRenderOrLegacyRenderSVGRoot() && !isSkippedContentRoot(*this)) |
| 264 | paintReplaced(paintInfo, adjustedPaintOffset); |
| 265 | else if (visibleToHitTesting()) { |
| 266 | auto borderRect = LayoutRect(adjustedPaintOffset, size()); |
| 267 | auto borderShape = BorderShape::shapeForBorderRect(style(), borderRect); |
| 268 | paintInfo.eventRegionContext()->unite(borderShape.deprecatedPixelSnappedRoundedRect(document().deviceScaleFactor()), *this, style()); |
| 269 | } |
| 270 | return; |
| 271 | } |
| 272 | |
| 273 | if (paintInfo.phase == PaintPhase::Accessibility) { |
| 274 | paintInfo.accessibilityRegionContext()->takeBounds(*this, adjustedPaintOffset); |
| 275 | return; |
| 276 | } |
| 277 | |
| 278 | SetLayoutNeededForbiddenScope scope(*this); |
| 279 | |
| 280 | GraphicsContextStateSaver savedGraphicsContext(paintInfo.context(), false); |
| 281 | if (element() && element()->parentOrShadowHostElement()) { |
| 282 | RefPtr parentContainer = element()->parentOrShadowHostElement(); |
| 283 | ASSERT(parentContainer)((void)0); |
| 284 | CheckedPtr markers = document().markersIfExists(); |
| 285 | if (markers) { |
| 286 | if (contentContainsReplacedElement(markers->markersFor(*parentContainer, DocumentMarkerType::DraggedContent), *element())) { |
| 287 | savedGraphicsContext.save(); |
| 288 | paintInfo.context().setAlpha(0.25); |
| 289 | } |
| 290 | if (contentContainsReplacedElement(markers->markersFor(*parentContainer, DocumentMarkerType::TransparentContent), *element())) { |
| 291 | savedGraphicsContext.save(); |
| 292 | paintInfo.context().setAlpha(0.0); |
| 293 | } |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | if (hasVisibleBoxDecorations() && paintInfo.phase == PaintPhase::Foreground) |
| 298 | paintBoxDecorations(paintInfo, adjustedPaintOffset); |
| 299 | |
| 300 | if (paintInfo.phase == PaintPhase::Mask) { |
| 301 | paintMask(paintInfo, adjustedPaintOffset); |
| 302 | return; |
| 303 | } |
| 304 | |
| 305 | if (paintInfo.phase == PaintPhase::ClippingMask && style().usedVisibility() == Visibility::Visible) { |
| 306 | paintClippingMask(paintInfo, adjustedPaintOffset); |
| 307 | return; |
| 308 | } |
| 309 | |
| 310 | LayoutRect paintRect = LayoutRect(adjustedPaintOffset, size()); |
| 311 | if (paintInfo.phase == PaintPhase::Outline || paintInfo.phase == PaintPhase::SelfOutline) { |
| 312 | if (style().usedOutlineWidth()) |
| 313 | paintOutline(paintInfo, paintRect); |
| 314 | return; |
| 315 | } |
| 316 | |
| 317 | if (paintInfo.phase != PaintPhase::Foreground && paintInfo.phase != PaintPhase::Selection) |
| 318 | return; |
| 319 | |
| 320 | if (!paintInfo.shouldPaintWithinRoot(*this)) |
| 321 | return; |
| 322 | |
| 323 | Color highlightColor; |
| 324 | if (!document().printing() && !paintInfo.paintBehavior.contains(PaintBehavior::ExcludeSelection)) |
| 325 | highlightColor = calculateHighlightColor(); |
| 326 | |
| 327 | bool drawSelectionTint = shouldDrawSelectionTint(); |
| 328 | if (paintInfo.phase == PaintPhase::Selection) { |
| 329 | if (selectionState() == HighlightState::None) |
| 330 | return; |
| 331 | drawSelectionTint = false; |
| 332 | } |
| 333 | |
| 334 | bool completelyClippedOut = false; |
| 335 | if (style().border().hasBorderRadius()) { |
| 336 | completelyClippedOut = size().isEmpty(); |
| 337 | if (!completelyClippedOut) { |
| 338 | // Push a clip if we have a border radius, since we want to round the foreground content that gets painted. |
| 339 | paintInfo.context().save(); |
| 340 | clipToContentBoxShape(paintInfo.context(), adjustedPaintOffset, document().deviceScaleFactor()); |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | if (!completelyClippedOut) { |
| 345 | if (!isSkippedContentRoot(*this)) |
| 346 | paintReplaced(paintInfo, adjustedPaintOffset); |
| 347 | |
| 348 | if (style().border().hasBorderRadius()) |
| 349 | paintInfo.context().restore(); |
| 350 | } |
| 351 | |
| 352 | // The selection tint never gets clipped by border-radius rounding, since we want it to run right up to the edges of |
| 353 | // surrounding content. |
| 354 | if (drawSelectionTint) { |
| 355 | LayoutRect selectionPaintingRect = localSelectionRect(); |
| 356 | selectionPaintingRect.moveBy(adjustedPaintOffset); |
| 357 | paintInfo.context().fillRect(snappedIntRect(selectionPaintingRect), selectionBackgroundColor()); |
| 358 | } |
| 359 | |
| 360 | if (highlightColor.isVisible()) { |
| 361 | auto selectionPaintingRect = localSelectionRect(false); |
| 362 | selectionPaintingRect.moveBy(adjustedPaintOffset); |
| 363 | paintInfo.context().fillRect(snappedIntRect(selectionPaintingRect), highlightColor); |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | bool RenderReplaced::shouldPaint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| 368 | { |
| 369 | if ((paintInfo.paintBehavior.contains(PaintBehavior::ExcludeSelection)) && isSelected()) |
| 370 | return false; |
| 371 | |
| 372 | if (paintInfo.paintBehavior.contains(PaintBehavior::ExcludeReplacedContentExceptForIFrames) && !isRenderIFrame()) |
| 373 | return false; |
| 374 | |
| 375 | if (paintInfo.phase != PaintPhase::Foreground |
| 376 | && paintInfo.phase != PaintPhase::Outline |
| 377 | && paintInfo.phase != PaintPhase::SelfOutline |
| 378 | && paintInfo.phase != PaintPhase::Selection |
| 379 | && paintInfo.phase != PaintPhase::Mask |
| 380 | && paintInfo.phase != PaintPhase::ClippingMask |
| 381 | && paintInfo.phase != PaintPhase::EventRegion |
| 382 | && paintInfo.phase != PaintPhase::Accessibility) |
| 383 | return false; |
| 384 | |
| 385 | if (!paintInfo.shouldPaintWithinRoot(*this)) |
| 386 | return false; |
| 387 | |
| 388 | // if we're invisible or haven't received a layout yet, then just bail. |
| 389 | if (style().usedVisibility() != Visibility::Visible) |
| 390 | return false; |
| 391 | |
| 392 | LayoutRect paintRect(visualOverflowRect()); |
| 393 | paintRect.moveBy(paintOffset + location()); |
| 394 | |
| 395 | // Early exit if the element touches the edges. |
| 396 | LayoutUnit top = paintRect.y(); |
| 397 | LayoutUnit bottom = paintRect.maxY(); |
| 398 | |
| 399 | LayoutRect localRepaintRect = paintInfo.rect; |
| 400 | if (paintRect.x() >= localRepaintRect.maxX() || paintRect.maxX() <= localRepaintRect.x()) |
| 401 | return false; |
| 402 | |
| 403 | if (top >= localRepaintRect.maxY() || bottom <= localRepaintRect.y()) |
| 404 | return false; |
| 405 | |
| 406 | return true; |
| 407 | } |
| 408 | |
| 409 | bool RenderReplaced::hasReplacedLogicalHeight() const |
| 410 | { |
| 411 | if (style().logicalHeight().isAuto()) |
| 412 | return false; |
| 413 | |
| 414 | if (style().logicalHeight().isFixed()) |
| 415 | return true; |
| 416 | |
| 417 | if (style().logicalHeight().isPercentOrCalculated()) |
| 418 | return !hasAutoHeightOrContainingBlockWithAutoHeight(); |
| 419 | |
| 420 | if (style().logicalHeight().isIntrinsic()) |
| 421 | return !style().aspectRatio().hasRatio(); |
| 422 | |
| 423 | return false; |
| 424 | } |
| 425 | |
| 426 | bool RenderReplaced::setNeedsLayoutIfNeededAfterIntrinsicSizeChange() |
| 427 | { |
| 428 | setNeedsPreferredWidthsUpdate(); |
| 429 | |
| 430 | // If the actual area occupied by the image has changed and it is not constrained by style then a layout is required. |
| 431 | bool imageSizeIsConstrained = style().logicalWidth().isSpecified() && style().logicalHeight().isSpecified() |
| 432 | && !style().logicalMinWidth().isIntrinsic() && !style().logicalMaxWidth().isIntrinsic() |
| 433 | && !hasAutoHeightOrContainingBlockWithAutoHeight(UpdatePercentageHeightDescendants::No); |
| 434 | |
| 435 | // FIXME: We only need to recompute the containing block's preferred size |
| 436 | // if the containing block's size depends on the image's size (i.e., the container uses shrink-to-fit sizing). |
| 437 | // There's no easy way to detect that shrink-to-fit is needed, always force a layout. |
| 438 | bool containingBlockNeedsToRecomputePreferredSize = |
| 439 | style().logicalWidth().isPercentOrCalculated() |
| 440 | || style().logicalMaxWidth().isPercentOrCalculated() |
| 441 | || style().logicalMinWidth().isPercentOrCalculated(); |
| 442 | |
| 443 | // Flex and grid layout use the intrinsic image width/height even if width/height are specified. |
| 444 | if (!imageSizeIsConstrained || containingBlockNeedsToRecomputePreferredSize || isFlexItem() || isGridItem()) { |
| 445 | setNeedsLayout(); |
| 446 | return true; |
| 447 | } |
| 448 | |
| 449 | return false; |
| 450 | } |
| 451 | |
| 452 | static bool isVideoWithDefaultObjectSize(const RenderReplaced* maybeVideo) |
| 453 | { |
| 454 | #if ENABLE(VIDEO)(defined 1 && 1) |
| 455 | if (auto* video = dynamicDowncast<RenderVideo>(maybeVideo)) |
| 456 | return video->hasDefaultObjectSize(); |
| 457 | #else |
| 458 | UNUSED_PARAM(maybeVideo)(void)maybeVideo; |
| 459 | #endif |
| 460 | return false; |
| 461 | } |
| 462 | |
| 463 | void RenderReplaced::computeAspectRatioInformationForRenderBox(RenderBox* contentRenderer, FloatSize& constrainedSize, FloatSize& preferredAspectRatio) const |
| 464 | { |
| 465 | FloatSize intrinsicSize; |
| 466 | if (shouldApplySizeOrInlineSizeContainment()) { |
| 467 | intrinsicSize = RenderReplaced::computeIntrinsicSize(); |
| 468 | preferredAspectRatio = RenderReplaced::preferredAspectRatio(); |
| 469 | } else if (contentRenderer) { |
| 470 | bool contentIsRenderReplaced = false; |
| 471 | if (auto* renderReplaced = dynamicDowncast<RenderReplaced>(contentRenderer)) { |
| 472 | intrinsicSize = renderReplaced->computeIntrinsicSize(); |
| 473 | preferredAspectRatio = renderReplaced->preferredAspectRatio(); |
| 474 | contentIsRenderReplaced = true; |
| 475 | } |
| 476 | if (style().aspectRatio().isRatio() || (style().aspectRatio().isAutoAndRatio() && preferredAspectRatio.isEmpty())) |
| 477 | preferredAspectRatio = FloatSize::narrowPrecision(style().aspectRatio().width().value, style().aspectRatio().height().value); |
| 478 | |
| 479 | // Handle zoom & vertical writing modes here, as the embedded document doesn't know about them. |
| 480 | intrinsicSize.scale(style().usedZoom()); |
| 481 | |
| 482 | if (auto* image = dynamicDowncast<RenderImage>(*this)) |
| 483 | intrinsicSize.scale(image->imageDevicePixelRatio()); |
| 484 | |
| 485 | // Update our intrinsic size to match what the content renderer has computed, so that when we |
| 486 | // constrain the size below, the correct intrinsic size will be obtained for comparison against |
| 487 | // min and max widths. |
| 488 | if (contentIsRenderReplaced && isRenderWidget()) { |
| 489 | // For RenderWidget content (e.g. <object> embedding an SVG document), always update |
| 490 | // m_intrinsicSize to reflect current intrinsic dimensions, applying CSS default fallback |
| 491 | // values (300x150) for dimensions with no intrinsic value (e.g. percentage-sized or |
| 492 | // removed attributes). This prevents stale cached sizes when attributes like width/height |
| 493 | // are removed. Note: this does not apply to RenderImage (<img src="svg">), which manages |
| 494 | // its own intrinsic size via setIntrinsicSize() during image load. |
| 495 | auto sizeToCache = intrinsicSize; |
| 496 | if (!sizeToCache.width()) |
| 497 | sizeToCache.setWidth(cDefaultWidth); |
| 498 | if (!sizeToCache.height()) |
| 499 | sizeToCache.setHeight(cDefaultHeight); |
| 500 | m_intrinsicSize = LayoutSize(sizeToCache); |
| 501 | } else if (!preferredAspectRatio.isEmpty() && !intrinsicSize.isZero()) |
| 502 | m_intrinsicSize = LayoutSize(intrinsicSize); |
| 503 | |
| 504 | if (!isHorizontalWritingMode()) { |
| 505 | if (!preferredAspectRatio.isEmpty()) |
| 506 | preferredAspectRatio = preferredAspectRatio.transposedSize(); |
| 507 | intrinsicSize = intrinsicSize.transposedSize(); |
| 508 | } |
| 509 | } else { |
| 510 | intrinsicSize = computeIntrinsicSize(); |
| 511 | preferredAspectRatio = this->preferredAspectRatio(); |
| 512 | if (!preferredAspectRatio.isEmpty() && !intrinsicSize.isZero()) |
| 513 | m_intrinsicSize = LayoutSize(isHorizontalWritingMode() ? intrinsicSize : intrinsicSize.transposedSize()); |
| 514 | } |
| 515 | constrainedSize = intrinsicSize; |
| 516 | } |
| 517 | |
| 518 | void RenderReplaced::computeIntrinsicSizesConstrainedByTransferredMinMaxSizes(RenderBox* contentRenderer, FloatSize& intrinsicSize, FloatSize& intrinsicRatio) const |
| 519 | { |
| 520 | computeAspectRatioInformationForRenderBox(contentRenderer, intrinsicSize, intrinsicRatio); |
| 521 | |
| 522 | // Now constrain the intrinsic size along each axis according to minimum and maximum width/heights along the |
| 523 | // opposite axis. So for example a maximum width that shrinks our width will result in the height we compute here |
| 524 | // having to shrink in order to preserve the aspect ratio. Because we compute these values independently along |
| 525 | // each axis, the final returned size may in fact not preserve the aspect ratio. |
| 526 | auto& style = this->style(); |
| 527 | auto computedLogicalHeight = style.logicalHeight(); |
| 528 | bool logicalHeightBehavesAsAuto = computedLogicalHeight.isAuto() || (computedLogicalHeight.isPercentOrCalculated() && !percentageLogicalHeightIsResolvable()); |
| 529 | if (!intrinsicRatio.isZero() && style.logicalWidth().isAuto() && logicalHeightBehavesAsAuto) { |
| 530 | auto removeBorderAndPaddingFromMinMaxSizes = [](LayoutUnit& minSize, LayoutUnit &maxSize, LayoutUnit borderAndPadding) { |
| 531 | minSize = std::max(0_lu, minSize - borderAndPadding); |
| 532 | maxSize = std::max(0_lu, maxSize - borderAndPadding); |
| 533 | }; |
| 534 | |
| 535 | auto [minLogicalWidth, maxLogicalWidth] = computeMinMaxLogicalWidthFromAspectRatio(); |
| 536 | removeBorderAndPaddingFromMinMaxSizes(minLogicalWidth, maxLogicalWidth, borderAndPaddingLogicalWidth()); |
| 537 | |
| 538 | auto [minLogicalHeight, maxLogicalHeight] = computeMinMaxLogicalHeightFromAspectRatio(); |
| 539 | removeBorderAndPaddingFromMinMaxSizes(minLogicalHeight, maxLogicalHeight, borderAndPaddingLogicalHeight()); |
| 540 | |
| 541 | // Only apply min-constraints upward when the dimension is actually intrinsic (non-zero). |
| 542 | // Max-constraints can always be applied since they only shrink values. |
| 543 | LayoutUnit width { intrinsicSize.width() }; |
| 544 | if (width > 0) |
| 545 | width = std::max(width, minLogicalWidth); |
| 546 | intrinsicSize.setWidth(std::min(width, maxLogicalWidth)); |
| 547 | |
| 548 | LayoutUnit height { intrinsicSize.height() }; |
| 549 | if (height > 0) |
| 550 | height = std::max(height, minLogicalHeight); |
| 551 | intrinsicSize.setHeight(std::min(height, maxLogicalHeight)); |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | LayoutRect RenderReplaced::replacedContentRect(const LayoutSize& intrinsicSize) const |
| 556 | { |
| 557 | LayoutRect contentRect = contentBoxRect(); |
| 558 | if (intrinsicSize.isEmpty()) |
| 559 | return contentRect; |
| 560 | |
| 561 | auto objectFit = style().objectFit(); |
| 562 | |
| 563 | LayoutRect finalRect = contentRect; |
| 564 | switch (objectFit) { |
| 565 | case ObjectFit::Contain: |
| 566 | case ObjectFit::ScaleDown: |
| 567 | case ObjectFit::Cover: |
| 568 | finalRect.setSize(finalRect.size().fitToAspectRatio(intrinsicSize, objectFit == ObjectFit::Cover ? AspectRatioFitGrow : AspectRatioFitShrink)); |
| 569 | if (objectFit != ObjectFit::ScaleDown || finalRect.width() <= intrinsicSize.width()) |
| 570 | break; |
| 571 | [[fallthrough]]; |
| 572 | case ObjectFit::None: |
| 573 | finalRect.setSize(intrinsicSize); |
| 574 | break; |
| 575 | case ObjectFit::Fill: |
| 576 | break; |
| 577 | } |
| 578 | |
| 579 | auto& objectPosition = style().objectPosition(); |
| 580 | auto zoom = style().usedZoomForLength(); |
| 581 | |
| 582 | auto xOffset = Style::evaluate<LayoutUnit>(objectPosition.x, contentRect.width() - finalRect.width(), zoom); |
| 583 | auto yOffset = Style::evaluate<LayoutUnit>(objectPosition.y, contentRect.height() - finalRect.height(), zoom); |
| 584 | |
| 585 | finalRect.move(xOffset, yOffset); |
| 586 | |
| 587 | return finalRect; |
| 588 | } |
| 589 | |
| 590 | double RenderReplaced::computeIntrinsicAspectRatio() const |
| 591 | { |
| 592 | FloatSize intrinsicRatio; |
| 593 | FloatSize intrinsicSize; |
| 594 | computeAspectRatioInformationForRenderBox(embeddedContentBox(), intrinsicSize, intrinsicRatio); |
| 595 | return intrinsicRatio.aspectRatioDouble(); |
| 596 | } |
| 597 | |
| 598 | FloatSize RenderReplaced::computeIntrinsicSize() const |
| 599 | { |
| 600 | // If there's an embeddedContentBox() of a remote, referenced document available, this code-path should never be used. |
| 601 | ASSERT(!embeddedContentBox() || shouldApplySizeOrInlineSizeContainment())((void)0); |
| 602 | return { intrinsicLogicalWidth(), intrinsicLogicalHeight() }; |
| 603 | } |
| 604 | |
| 605 | FloatSize RenderReplaced::preferredAspectRatio() const |
| 606 | { |
| 607 | // If there's an embeddedContentBox() of a remote, referenced document available, this code-path should never be used. |
| 608 | ASSERT(!embeddedContentBox() || shouldApplySizeOrInlineSizeContainment())((void)0); |
| 609 | auto intrinsicSize = FloatSize(intrinsicLogicalWidth(), intrinsicLogicalHeight()); |
| 610 | FloatSize preferredAspectRatio; |
| 611 | |
| 612 | if (style().aspectRatio().hasRatio()) { |
| 613 | preferredAspectRatio = FloatSize::narrowPrecision(style().aspectRatioLogicalWidth().value, style().aspectRatioLogicalHeight().value); |
| 614 | if (style().aspectRatio().isRatio() || isVideoWithDefaultObjectSize(this)) |
| 615 | return preferredAspectRatio; |
| 616 | } |
| 617 | // Figure out if we need to compute an intrinsic ratio. |
| 618 | if (!RenderBox::hasIntrinsicAspectRatio() && !isRenderOrLegacyRenderSVGRoot()) |
| 619 | return preferredAspectRatio; |
| 620 | |
| 621 | // After supporting contain-intrinsic-size, the intrinsicSize of size containment is not always empty. |
| 622 | if (intrinsicSize.isEmpty() || shouldApplySizeContainment()) |
| 623 | return preferredAspectRatio; |
| 624 | |
| 625 | return intrinsicSize; |
| 626 | } |
| 627 | |
| 628 | LayoutUnit RenderReplaced::computeConstrainedLogicalWidth() const |
| 629 | { |
| 630 | // The aforementioned 'constraint equation' used for block-level, non-replaced |
| 631 | // elements in normal flow: |
| 632 | // 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + |
| 633 | // 'padding-right' + 'border-right-width' + 'margin-right' = width of |
| 634 | // containing block |
| 635 | // see https://www.w3.org/TR/CSS22/visudet.html#blockwidth |
| 636 | LayoutUnit logicalWidth; |
| 637 | if (isOutOfFlowPositioned()) { |
| 638 | // For absolutely positioned elements with both left and right set, |
| 639 | // the available width is constrained by those values. |
| 640 | auto& logicalLeft = style().logicalLeft(); |
| 641 | auto& logicalRight = style().logicalRight(); |
| 642 | auto containerWidth = containingBlock()->clientLogicalWidth(); |
| 643 | |
| 644 | if (!logicalLeft.isAuto() && !logicalRight.isAuto()) { |
| 645 | auto left = Style::evaluate<LayoutUnit>(logicalLeft, containerWidth, style().usedZoomForLength()); |
| 646 | auto right = Style::evaluate<LayoutUnit>(logicalRight, containerWidth, style().usedZoomForLength()); |
| 647 | logicalWidth = containerWidth - left - right; |
| 648 | } else |
| 649 | logicalWidth = containerWidth; |
| 650 | } else |
| 651 | logicalWidth = containingBlock()->contentBoxLogicalWidth(); |
| 652 | |
| 653 | // This solves above equation for 'width' (== logicalWidth). |
| 654 | auto marginStart = Style::evaluateMinimum<LayoutUnit>(style().marginStart(), logicalWidth, style().usedZoomForLength()); |
| 655 | auto marginEnd = Style::evaluateMinimum<LayoutUnit>(style().marginEnd(), logicalWidth, style().usedZoomForLength()); |
| 656 | |
| 657 | return std::max(0_lu, (logicalWidth - (marginStart + marginEnd + borderLeft() + borderRight() + paddingLeft() + paddingRight()))); |
| 658 | } |
| 659 | |
| 660 | void RenderReplaced::computeAspectRatioAdjustedIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const |
| 661 | { |
| 662 | computeIntrinsicLogicalWidths(minLogicalWidth, maxLogicalWidth); |
| 663 | |
| 664 | if (!hasIntrinsicAspectRatio()) |
| 665 | return; |
| 666 | |
| 667 | auto& style = this->style(); |
| 668 | auto computedAspectRatio = computeIntrinsicAspectRatio(); |
| 669 | auto computedIntrinsicLogicalWidth = minLogicalWidth; |
| 670 | |
| 671 | auto resolveHeightForAspectRatio = [&](auto& length, bool canResolvePercentage) -> std::optional<LayoutUnit> { |
| 672 | if (auto fixedHeight = length.tryFixed()) |
| 673 | return LayoutUnit { fixedHeight->resolveZoom(style.usedZoomForLength()) }; |
| 674 | |
| 675 | if (length.isPercentOrCalculated() && canResolvePercentage) |
| 676 | return computePercentageLogicalHeight(length, UpdatePercentageHeightDescendants::No); |
| 677 | return std::nullopt; |
| 678 | }; |
| 679 | |
| 680 | // Resolve height and apply aspect ratio if available |
| 681 | if (auto resolvedLogicalHeight = resolveHeightForAspectRatio(style.logicalHeight(), hasReplacedLogicalHeight())) |
| 682 | computedIntrinsicLogicalWidth = *resolvedLogicalHeight * computedAspectRatio; |
| 683 | |
| 684 | // Apply max-height constraint |
| 685 | if (auto resolvedLogicalMaxHeight = resolveHeightForAspectRatio(style.logicalMaxHeight(), !replacedMaxLogicalHeightComputesAsNone())) |
| 686 | computedIntrinsicLogicalWidth = std::min(computedIntrinsicLogicalWidth, LayoutUnit { *resolvedLogicalMaxHeight * computedAspectRatio }); |
| 687 | |
| 688 | // Apply min-height constraint |
| 689 | if (auto resolvedLogicalMinHeight = resolveHeightForAspectRatio(style.logicalMinHeight(), !replacedMinLogicalHeightComputesAsNone())) |
| 690 | computedIntrinsicLogicalWidth = std::max(computedIntrinsicLogicalWidth, LayoutUnit { *resolvedLogicalMinHeight * computedAspectRatio }); |
| 691 | |
| 692 | minLogicalWidth = computedIntrinsicLogicalWidth; |
| 693 | maxLogicalWidth = minLogicalWidth; |
| 694 | } |
| 695 | |
| 696 | static inline LayoutUnit resolveWidthForRatio(LayoutUnit borderAndPaddingLogicalHeight, LayoutUnit borderAndPaddingLogicalWidth, LayoutUnit logicalHeight, double aspectRatio, BoxSizing boxSizing) |
| 697 | { |
| 698 | if (boxSizing == BoxSizing::BorderBox) |
| 699 | return LayoutUnit((logicalHeight + borderAndPaddingLogicalHeight) * aspectRatio) - borderAndPaddingLogicalWidth; |
| 700 | return LayoutUnit(logicalHeight * aspectRatio); |
| 701 | } |
| 702 | |
| 703 | static inline bool hasIntrinsicSize(RenderBox*contentRenderer, bool hasIntrinsicWidth, bool hasIntrinsicHeight ) |
| 704 | { |
| 705 | if (hasIntrinsicWidth && hasIntrinsicHeight) |
| 706 | return true; |
| 707 | if (hasIntrinsicWidth || hasIntrinsicHeight) |
| 708 | return contentRenderer && contentRenderer->isRenderOrLegacyRenderSVGRoot(); |
| 709 | return false; |
| 710 | } |
| 711 | |
| 712 | LayoutUnit RenderReplaced::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const |
| 713 | { |
| 714 | auto& style = this->style(); |
| 715 | if (style.logicalWidth().isSpecified()) |
| 716 | return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(style.logicalWidth()), shouldComputePreferred); |
| 717 | if (style.logicalWidth().isIntrinsic()) |
| 718 | return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(style.logicalWidth()), shouldComputePreferred); |
| 719 | |
| 720 | RenderBox* contentRenderer = embeddedContentBox(); |
| 721 | |
| 722 | // 10.3.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width |
| 723 | FloatSize intrinsicRatio; |
| 724 | FloatSize constrainedSize; |
| 725 | computeIntrinsicSizesConstrainedByTransferredMinMaxSizes(contentRenderer, constrainedSize, intrinsicRatio); |
| 726 | |
| 727 | if (style.logicalWidth().isAuto()) { |
| 728 | bool computedHeightIsAuto = style.logicalHeight().isAuto(); |
| 729 | bool hasIntrinsicWidth = constrainedSize.width() > 0 || (!constrainedSize.width() && shouldRespectZeroIntrinsicWidth()) || shouldApplySizeOrInlineSizeContainment(); |
| 730 | bool hasIntrinsicHeight = constrainedSize.height() > 0 || shouldApplySizeContainment(); |
| 731 | |
| 732 | // For flex or grid items where the logical height has been overriden then we should use that size to compute the replaced width as long as the flex or |
| 733 | // grid item has an intrinsic size. It is possible (indeed, common) for an SVG graphic to have an intrinsic aspect ratio but not to have an intrinsic |
| 734 | // width or height. There are also elements with intrinsic sizes but without intrinsic ratio (like an iframe). |
| 735 | if (auto overridingLogicalHeight = (!intrinsicRatio.isEmpty() && (isFlexItem() || isGridItem()) && hasIntrinsicSize(contentRenderer, hasIntrinsicWidth, hasIntrinsicHeight) ? this->overridingBorderBoxLogicalHeight() : std::nullopt)) |
| 736 | return computeReplacedLogicalWidthRespectingMinMaxWidth(contentBoxLogicalHeight(*overridingLogicalHeight) * intrinsicRatio.aspectRatioDouble(), shouldComputePreferred); |
| 737 | |
| 738 | // If 'height' and 'width' both have computed values of 'auto' and the element also has an intrinsic width, then that intrinsic width is the used value of 'width'. |
| 739 | if (computedHeightIsAuto && hasIntrinsicWidth) |
| 740 | return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred); |
| 741 | |
| 742 | if (!intrinsicRatio.isEmpty()) { |
| 743 | // If 'height' and 'width' both have computed values of 'auto' and the element has no intrinsic width, but does have an intrinsic height and intrinsic ratio; |
| 744 | // or if 'width' has a computed value of 'auto', 'height' has some other computed value, and the element does have an intrinsic ratio; then the used value |
| 745 | // of 'width' is: (used height) * (intrinsic ratio) |
| 746 | if (!computedHeightIsAuto || (!hasIntrinsicWidth && hasIntrinsicHeight)) { |
| 747 | auto estimatedUsedWidth = [&] { |
| 748 | if (hasIntrinsicWidth) |
| 749 | return LayoutUnit(constrainedSize.width()); |
| 750 | |
| 751 | if (shouldComputePreferred == ShouldComputePreferred::ComputePreferred) |
| 752 | return computeReplacedLogicalWidthRespectingMinMaxWidth(0_lu, ShouldComputePreferred::ComputePreferred); |
| 753 | |
| 754 | auto constrainedLogicalWidth = computeConstrainedLogicalWidth(); |
| 755 | return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedLogicalWidth, ShouldComputePreferred::ComputeActual); |
| 756 | }(); |
| 757 | |
| 758 | LayoutUnit logicalHeight = computeReplacedLogicalHeight(std::optional<LayoutUnit>(estimatedUsedWidth)); |
| 759 | auto boxSizing = style.aspectRatio().hasRatio() ? style.boxSizingForAspectRatio() : BoxSizing::ContentBox; |
| 760 | return computeReplacedLogicalWidthRespectingMinMaxWidth(resolveWidthForRatio(borderAndPaddingLogicalHeight(), borderAndPaddingLogicalWidth(), logicalHeight, intrinsicRatio.aspectRatioDouble(), boxSizing), shouldComputePreferred); |
| 761 | } |
| 762 | |
| 763 | // If 'height' and 'width' both have computed values of 'auto' and the |
| 764 | // element has an intrinsic ratio but no intrinsic height or width, then |
| 765 | // the used value of 'width' is undefined in CSS 2.1. However, it is |
| 766 | // suggested that, if the containing block's width does not itself depend |
| 767 | // on the replaced element's width, then the used value of 'width' is |
| 768 | // calculated from the constraint equation used for block-level, |
| 769 | // non-replaced elements in normal flow. |
| 770 | if (computedHeightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight) { |
| 771 | bool isFlexItemComputingBaseSize = isFlexItem() && downcast<RenderFlexibleBox>(parent())->isComputingFlexBaseSizes(); |
| 772 | if (shouldComputePreferred == ShouldComputePreferred::ComputePreferred && !isFlexItemComputingBaseSize) |
| 773 | return computeReplacedLogicalWidthRespectingMinMaxWidth(0_lu, ShouldComputePreferred::ComputePreferred); |
| 774 | |
| 775 | auto constrainedLogicalWidth = computeConstrainedLogicalWidth(); |
| 776 | auto [transferredMinLogicalWidth, transferredMaxLogicalWidth] = computeMinMaxLogicalWidthFromAspectRatio(); |
| 777 | ASSERT(transferredMinLogicalWidth <= transferredMaxLogicalWidth)((void)0); |
| 778 | constrainedLogicalWidth = std::clamp(constrainedLogicalWidth, transferredMinLogicalWidth, transferredMaxLogicalWidth); |
| 779 | |
| 780 | // For absolutely positioned elements with both insets set, don't let max-width intrinsic |
| 781 | // keywords constrain the width. |
| 782 | auto& style = this->style(); |
| 783 | if (isOutOfFlowPositioned() && !style.logicalLeft().isAuto() && !style.logicalRight().isAuto()) { |
| 784 | // Still respect min-width, but ignore max-width if it's an intrinsic keyword. |
| 785 | auto& logicalMinWidth = style.logicalMinWidth(); |
| 786 | auto minLogicalWidth = logicalMinWidth.isIntrinsic() ? 0_lu : computeReplacedLogicalWidthUsing(logicalMinWidth); |
| 787 | return std::max(minLogicalWidth, constrainedLogicalWidth); |
| 788 | } |
| 789 | |
| 790 | return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedLogicalWidth, ShouldComputePreferred::ComputeActual); |
| 791 | } |
| 792 | } |
| 793 | |
| 794 | // Otherwise, if 'width' has a computed value of 'auto', and the element has an intrinsic width, then that intrinsic width is the used value of 'width'. |
| 795 | if (hasIntrinsicWidth) |
| 796 | return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred); |
| 797 | |
| 798 | // Otherwise, if 'width' has a computed value of 'auto', but none of the conditions above are met, then the used value of 'width' becomes 300px. If 300px is too |
| 799 | // wide to fit the device, UAs should use the width of the largest rectangle that has a 2:1 ratio and fits the device instead. |
| 800 | // Note: We fall through and instead return intrinsicLogicalWidth() here - to preserve existing WebKit behavior, which might or might not be correct, or desired. |
| 801 | // Changing this to return cDefaultWidth, will affect lots of test results. Eg. some tests assume that a blank <img> tag (which implies width/height=auto) |
| 802 | // has no intrinsic size, which is wrong per CSS 2.1, but matches our behavior since a long time. |
| 803 | } |
| 804 | |
| 805 | return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), shouldComputePreferred); |
| 806 | } |
| 807 | |
| 808 | LayoutUnit RenderReplaced::computeReplacedLogicalHeight(std::optional<LayoutUnit> estimatedUsedWidth) const |
| 809 | { |
| 810 | // 10.5 Content height: the 'height' property: http://www.w3.org/TR/CSS21/visudet.html#propdef-height |
| 811 | if (hasReplacedLogicalHeight()) |
| 812 | return computeReplacedLogicalHeightRespectingMinMaxHeight(computeReplacedLogicalHeightUsing(style().logicalHeight())); |
| 813 | |
| 814 | RenderBox* contentRenderer = embeddedContentBox(); |
| 815 | |
| 816 | // 10.6.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-height |
| 817 | FloatSize intrinsicRatio; |
| 818 | FloatSize constrainedSize; |
| 819 | computeIntrinsicSizesConstrainedByTransferredMinMaxSizes(contentRenderer, constrainedSize, intrinsicRatio); |
| 820 | |
| 821 | bool widthIsAuto = style().logicalWidth().isAuto(); |
| 822 | bool hasIntrinsicWidth = constrainedSize.width() > 0 || (!constrainedSize.width() && shouldRespectZeroIntrinsicWidth()) || shouldApplySizeOrInlineSizeContainment(); |
| 823 | bool hasIntrinsicHeight = constrainedSize.height() > 0 || shouldApplySizeContainment(); |
| 824 | |
| 825 | // See computeReplacedLogicalHeight() for a similar check for heights. |
| 826 | if (auto overridinglogicalWidth = (!intrinsicRatio.isEmpty() && (isFlexItem() || isGridItem()) && hasIntrinsicSize(contentRenderer, hasIntrinsicWidth, hasIntrinsicHeight) ? overridingBorderBoxLogicalWidth() : std::nullopt)) |
| 827 | return computeReplacedLogicalHeightRespectingMinMaxHeight(contentBoxLogicalWidth(*overridinglogicalWidth) * intrinsicRatio.transposedSize().aspectRatioDouble()); |
| 828 | |
| 829 | // If 'height' and 'width' both have computed values of 'auto' and the element also has an intrinsic height, then that intrinsic height is the used value of 'height'. |
| 830 | if (widthIsAuto && hasIntrinsicHeight) |
| 831 | return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height()); |
| 832 | |
| 833 | // Otherwise, if 'height' has a computed value of 'auto', and the element has an intrinsic ratio then the used value of 'height' is: |
| 834 | // (used width) / (intrinsic ratio) |
| 835 | if (!intrinsicRatio.isEmpty()) { |
| 836 | LayoutUnit usedWidth = estimatedUsedWidth ? estimatedUsedWidth.value() : contentBoxLogicalWidth(); |
| 837 | BoxSizing boxSizing = BoxSizing::ContentBox; |
| 838 | if (style().aspectRatio().hasRatio()) |
| 839 | boxSizing = style().boxSizingForAspectRatio(); |
| 840 | return computeReplacedLogicalHeightRespectingMinMaxHeight(resolveHeightForRatio(borderAndPaddingLogicalWidth(), borderAndPaddingLogicalHeight(), usedWidth, intrinsicRatio.transposedSize().aspectRatioDouble(), boxSizing)); |
| 841 | } |
| 842 | |
| 843 | // Otherwise, if 'height' has a computed value of 'auto', and the element has an intrinsic height, then that intrinsic height is the used value of 'height'. |
| 844 | if (hasIntrinsicHeight) |
| 845 | return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height()); |
| 846 | |
| 847 | // Otherwise, if 'height' has a computed value of 'auto', but none of the conditions above are met, then the used value of 'height' must be set to the height |
| 848 | // of the largest rectangle that has a 2:1 ratio, has a height not greater than 150px, and has a width not greater than the device width. |
| 849 | return computeReplacedLogicalHeightRespectingMinMaxHeight(intrinsicLogicalHeight()); |
| 850 | } |
| 851 | |
| 852 | void RenderReplaced::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const |
| 853 | { |
| 854 | minLogicalWidth = maxLogicalWidth = intrinsicLogicalWidth(); |
| 855 | } |
| 856 | |
| 857 | void RenderReplaced::computePreferredLogicalWidths() |
| 858 | { |
| 859 | ASSERT(needsPreferredLogicalWidthsUpdate())((void)0); |
| 860 | |
| 861 | // We cannot resolve any percent logical width here as the available logical |
| 862 | // width may not be set on our containing block. |
| 863 | if (style().logicalWidth().isPercentOrCalculated()) |
| 864 | computeAspectRatioAdjustedIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth); |
| 865 | else |
| 866 | m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = computeReplacedLogicalWidth(ShouldComputePreferred::ComputePreferred); |
| 867 | |
| 868 | bool ignoreMinMaxSizes = shouldIgnoreLogicalMinMaxWidthSizes(); |
| 869 | const RenderStyle& styleToUse = style(); |
| 870 | if (styleToUse.logicalWidth().isPercentOrCalculated() || styleToUse.logicalMaxWidth().isPercentOrCalculated()) |
| 871 | m_minPreferredLogicalWidth = 0; |
| 872 | |
| 873 | if (auto fixedLogicalMinWidth = styleToUse.logicalMinWidth().tryFixed(); !ignoreMinMaxSizes && fixedLogicalMinWidth && fixedLogicalMinWidth->isPositive()) { |
| 874 | m_maxPreferredLogicalWidth = std::max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(*fixedLogicalMinWidth)); |
| 875 | m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(*fixedLogicalMinWidth)); |
| 876 | } |
| 877 | |
| 878 | if (auto fixedLogicalMaxWidth = styleToUse.logicalMaxWidth().tryFixed(); !ignoreMinMaxSizes && fixedLogicalMaxWidth) { |
| 879 | m_maxPreferredLogicalWidth = std::min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(*fixedLogicalMaxWidth)); |
| 880 | m_minPreferredLogicalWidth = std::min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(*fixedLogicalMaxWidth)); |
| 881 | } |
| 882 | |
| 883 | LayoutUnit borderAndPadding = borderAndPaddingLogicalWidth(); |
| 884 | m_minPreferredLogicalWidth += borderAndPadding; |
| 885 | m_maxPreferredLogicalWidth += borderAndPadding; |
| 886 | |
| 887 | clearNeedsPreferredWidthsUpdate(); |
| 888 | } |
| 889 | |
| 890 | PositionWithAffinity RenderReplaced::positionForPoint(const LayoutPoint& point, HitTestSource source, const RenderFragmentContainer* fragment) |
| 891 | { |
| 892 | auto [top, bottom] = [&]() -> std::pair<float, float> { |
| 893 | if (auto run = InlineIterator::boxFor(*this)) { |
| 894 | auto lineBox = run->lineBox(); |
| 895 | auto lineContentTop = LayoutUnit { std::min(previousLineBoxContentBottomOrBorderAndPadding(*lineBox), lineBox->contentLogicalTop()) }; |
| 896 | return std::make_pair(lineContentTop, LineSelection::logicalBottom(*lineBox)); |
| 897 | } |
| 898 | return std::make_pair(logicalTop(), logicalBottom()); |
| 899 | }(); |
| 900 | |
| 901 | LayoutUnit blockDirectionPosition = isHorizontalWritingMode() ? point.y() + y() : point.x() + x(); |
| 902 | LayoutUnit lineDirectionPosition = isHorizontalWritingMode() ? point.x() + x() : point.y() + y(); |
| 903 | |
| 904 | if (blockDirectionPosition < top) |
| 905 | return createPositionWithAffinity(caretMinOffset(), Affinity::Downstream); // coordinates are above |
| 906 | |
| 907 | if (blockDirectionPosition >= bottom) |
| 908 | return createPositionWithAffinity(caretMaxOffset(), Affinity::Downstream); // coordinates are below |
| 909 | |
| 910 | if (element()) { |
| 911 | if (lineDirectionPosition <= logicalLeft() + (logicalWidth() / 2)) |
| 912 | return createPositionWithAffinity(0, Affinity::Downstream); |
| 913 | return createPositionWithAffinity(1, Affinity::Downstream); |
| 914 | } |
| 915 | |
| 916 | return RenderBox::positionForPoint(point, source, fragment); |
| 917 | } |
| 918 | |
| 919 | LayoutRect RenderReplaced::selectionRectForRepaint(const RenderLayerModelObject* repaintContainer, bool clipToVisibleContent) |
| 920 | { |
| 921 | ASSERT(!needsLayout())((void)0); |
| 922 | |
| 923 | if (!isSelected()) |
| 924 | return LayoutRect(); |
| 925 | |
| 926 | LayoutRect rect = localSelectionRect(); |
| 927 | if (clipToVisibleContent) |
| 928 | return computeRectForRepaint(rect, repaintContainer); |
| 929 | return localToContainerQuad(FloatRect(rect), repaintContainer).enclosingBoundingBox(); |
| 930 | } |
| 931 | |
| 932 | LayoutRect RenderReplaced::localSelectionRect(bool checkWhetherSelected) const |
| 933 | { |
| 934 | if (checkWhetherSelected && !isSelected()) |
| 935 | return LayoutRect(); |
| 936 | |
| 937 | return LayoutRect(LayoutPoint(), size()); |
| 938 | } |
| 939 | |
| 940 | bool RenderReplaced::isSelected() const |
| 941 | { |
| 942 | return isHighlighted(selectionState(), view().selection()); |
| 943 | } |
| 944 | |
| 945 | bool RenderReplaced::isHighlighted(HighlightState state, const RenderHighlight& rangeData) const |
| 946 | { |
| 947 | if (state == HighlightState::None) |
| 948 | return false; |
| 949 | if (state == HighlightState::Inside) |
| 950 | return true; |
| 951 | |
| 952 | auto selectionStart = rangeData.startOffset(); |
| 953 | auto selectionEnd = rangeData.endOffset(); |
| 954 | if (state == HighlightState::Start) |
| 955 | return !selectionStart; |
| 956 | |
| 957 | unsigned end = element()->hasChildNodes() ? element()->countChildNodes() : 1; |
| 958 | if (state == HighlightState::End) |
| 959 | return selectionEnd == end; |
| 960 | if (state == HighlightState::Both) |
| 961 | return !selectionStart && selectionEnd == end; |
| 962 | ASSERT_NOT_REACHED()((void)0); |
| 963 | return false; |
| 964 | } |
| 965 | |
| 966 | auto RenderReplaced::localRectsForRepaint(RepaintOutlineBounds repaintOutlineBounds) const -> RepaintRects |
| 967 | { |
| 968 | if (isInsideEntirelyHiddenLayer()) |
| 969 | return { }; |
| 970 | |
| 971 | // The selectionRect can project outside of the overflowRect, so take their union |
| 972 | // for repainting to avoid selection painting glitches. |
| 973 | auto overflowRect = unionRect(localSelectionRect(false), visualOverflowRect()); |
| 974 | |
| 975 | // FIXME: layoutDelta needs to be applied in parts before/after transforms and |
| 976 | // repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308 |
| 977 | overflowRect.move(view().frameView().layoutContext().layoutDelta()); |
| 978 | |
| 979 | auto rects = RepaintRects { overflowRect }; |
| 980 | if (repaintOutlineBounds == RepaintOutlineBounds::Yes) |
| 981 | rects.outlineBoundsRect = localOutlineBoundsRepaintRect(); |
| 982 | |
| 983 | return rects; |
| 984 | } |
| 985 | |
| 986 | bool RenderReplaced::isContentLikelyVisibleInViewport() |
| 987 | { |
| 988 | if (!isVisibleIgnoringGeometry()) |
| 989 | return false; |
| 990 | |
| 991 | auto& frameView = view().frameView(); |
Local variable 'frameView' is uncounted and unsafe | |
| 992 | auto visibleRect = LayoutRect(frameView.windowToContents(frameView.windowClipRect())); |
| 993 | auto contentRect = computeRectForRepaint(replacedContentRect(), nullptr); |
| 994 | |
| 995 | // Content rectangle may be empty because it is intrinsically sized and the content has not loaded yet. |
| 996 | if (contentRect.isEmpty() && (style().logicalWidth().isAuto() || style().logicalHeight().isAuto())) |
| 997 | return visibleRect.contains(contentRect.location()); |
| 998 | |
| 999 | return visibleRect.intersects(contentRect); |
| 1000 | } |
| 1001 | |
| 1002 | bool RenderReplaced::shouldInvalidatePreferredWidths() const |
| 1003 | { |
| 1004 | // If the height is a percentage and the width is auto, then the containingBlocks's height changing can cause this node to change it's preferred width because it maintains aspect ratio. |
| 1005 | return (hasRelativeLogicalHeight() || (isGridItem() && hasStretchedLogicalHeight())) && style().logicalWidth().isAuto(); |
| 1006 | } |
| 1007 | |
| 1008 | LayoutSize RenderReplaced::intrinsicSize() const |
| 1009 | { |
| 1010 | if (!view().frameView().layoutContext().isInRenderTreeLayout()) { |
| 1011 | // 'contain' removes the natural aspect ratio / width / height only for the purposes of sizing and layout of the box. |
| 1012 | return m_intrinsicSize; |
| 1013 | } |
| 1014 | |
| 1015 | auto size = m_intrinsicSize; |
| 1016 | auto zoomValue = style().usedZoom(); |
| 1017 | if (isHorizontalWritingMode() ? shouldApplySizeOrInlineSizeContainment() : shouldApplySizeContainment()) |
| 1018 | size.setWidth(explicitIntrinsicInnerWidth().value_or(0_lu) * zoomValue); |
| 1019 | if (isHorizontalWritingMode() ? shouldApplySizeContainment() : shouldApplySizeOrInlineSizeContainment()) |
| 1020 | size.setHeight(explicitIntrinsicInnerHeight().value_or(0_lu) * zoomValue); |
| 1021 | return size; |
| 1022 | } |
| 1023 | |
| 1024 | void RenderReplaced::layoutShadowContent(const LayoutSize& oldSize) |
| 1025 | { |
| 1026 | for (auto& renderBox : childrenOfType<RenderBox>(*this)) { |
| 1027 | auto newSize = contentBoxRect().size(); |
| 1028 | |
| 1029 | if (is<RenderImage>(this)) { |
| 1030 | bool childNeedsLayout = renderBox.needsLayout(); |
| 1031 | // If the region chain has changed we also need to relayout the children to update the region box info. |
| 1032 | // FIXME: We can do better once we compute region box info for RenderReplaced, not only for RenderBlock. |
| 1033 | if (CheckedPtr fragmentedFlow = enclosingFragmentedFlow(); fragmentedFlow && !childNeedsLayout) { |
| 1034 | if (fragmentedFlow->pageLogicalSizeChanged()) |
| 1035 | childNeedsLayout = true; |
| 1036 | } |
| 1037 | |
| 1038 | if (newSize == oldSize && !childNeedsLayout) |
| 1039 | continue; |
| 1040 | } |
| 1041 | |
| 1042 | // When calling layout() on a child node, a parent must either push a LayoutStateMaintainer, or |
| 1043 | // instantiate LayoutStateDisabler. Since using a LayoutStateMaintainer is slightly more efficient, |
| 1044 | // and this method might be called many times per second during video playback, use a LayoutStateMaintainer: |
| 1045 | LayoutStateMaintainer statePusher(*this, locationOffset(), isTransformed() || hasReflection() || writingMode().isBlockFlipped()); |
| 1046 | renderBox.setLocation(LayoutPoint(borderLeft(), borderTop()) + LayoutSize(paddingLeft(), paddingTop())); |
| 1047 | |
| 1048 | auto usedZoom = renderBox.style().usedZoomForLength(); |
| 1049 | renderBox.mutableStyle().setHeight(Style::PreferredSize::Fixed { newSize.height() / usedZoom.value }); |
| 1050 | renderBox.mutableStyle().setWidth(Style::PreferredSize::Fixed { newSize.width() / usedZoom.value }); |
| 1051 | |
| 1052 | renderBox.setNeedsLayout(MarkOnlyThis); |
| 1053 | renderBox.layout(); |
| 1054 | } |
| 1055 | |
| 1056 | clearChildNeedsLayout(); |
| 1057 | } |
| 1058 | |
| 1059 | FloatSize RenderReplaced::intrinsicRatio() const |
| 1060 | { |
| 1061 | FloatSize intrinsicRatio; |
| 1062 | FloatSize constrainedSize; |
| 1063 | computeAspectRatioInformationForRenderBox(embeddedContentBox(), constrainedSize, intrinsicRatio); |
| 1064 | return intrinsicRatio; |
| 1065 | } |
| 1066 | |
| 1067 | void RenderReplaced::computeReplacedOutOfFlowPositionedLogicalWidth(LogicalExtentComputedValues& computedValues) const |
| 1068 | { |
| 1069 | PositionedLayoutConstraints inlineConstraints(*this, LogicalBoxAxis::Inline); |
| 1070 | inlineConstraints.computeInsets(); |
| 1071 | |
| 1072 | // NOTE: This value of width is final in that the min/max width calculations |
| 1073 | // are dealt with in computeReplacedWidth(). This means that the steps to produce |
| 1074 | // correct max/min in the non-replaced version, are not necessary. |
| 1075 | computedValues.extent = computeReplacedLogicalWidth() + borderAndPaddingLogicalWidth(); |
| 1076 | |
| 1077 | inlineConstraints.resolvePosition(computedValues); |
| 1078 | inlineConstraints.fixupLogicalLeftPosition(computedValues); |
| 1079 | } |
| 1080 | |
| 1081 | void RenderReplaced::computeReplacedOutOfFlowPositionedLogicalHeight(LogicalExtentComputedValues& computedValues) const |
| 1082 | { |
| 1083 | PositionedLayoutConstraints blockConstraints(*this, LogicalBoxAxis::Block); |
| 1084 | blockConstraints.computeInsets(); |
| 1085 | |
| 1086 | // NOTE: This value of height is final in that the min/max height calculations |
| 1087 | // are dealt with in computeReplacedHeight(). This means that the steps to produce |
| 1088 | // correct max/min in the non-replaced version, are not necessary. |
| 1089 | computedValues.extent = computeReplacedLogicalHeight() + borderAndPaddingLogicalHeight(); |
| 1090 | |
| 1091 | blockConstraints.resolvePosition(computedValues); |
| 1092 | blockConstraints.adjustLogicalTopWithLogicalHeightIfNeeded(computedValues); |
| 1093 | } |
| 1094 | |
| 1095 | LayoutUnit RenderReplaced::computeReplacedLogicalWidthRespectingMinMaxWidth(LayoutUnit logicalWidth, ShouldComputePreferred shouldComputePreferred) const |
| 1096 | { |
| 1097 | if (shouldIgnoreLogicalMinMaxWidthSizes()) |
| 1098 | return logicalWidth; |
| 1099 | |
| 1100 | auto& logicalMinWidth = style().logicalMinWidth(); |
| 1101 | auto& logicalMaxWidth = style().logicalMaxWidth(); |
| 1102 | bool useLogicalWidthForMinWidth = (shouldComputePreferred == ShouldComputePreferred::ComputePreferred && logicalMinWidth.isPercentOrCalculated()); |
| 1103 | bool useLogicalWidthForMaxWidth = (shouldComputePreferred == ShouldComputePreferred::ComputePreferred && logicalMaxWidth.isPercentOrCalculated()) || logicalMaxWidth.isNone(); |
| 1104 | auto minLogicalWidth = useLogicalWidthForMinWidth ? logicalWidth : computeReplacedLogicalWidthUsing(logicalMinWidth); |
| 1105 | auto maxLogicalWidth = useLogicalWidthForMaxWidth ? logicalWidth : computeReplacedLogicalWidthUsing(logicalMaxWidth); |
| 1106 | return std::max(minLogicalWidth, std::min(logicalWidth, maxLogicalWidth)); |
| 1107 | } |
| 1108 | |
| 1109 | template<typename SizeType> |
| 1110 | LayoutUnit RenderReplaced::computeReplacedLogicalWidthUsing(const SizeType& logicalWidth) const |
| 1111 | { |
| 1112 | auto calculateContainerWidth = [&] { |
| 1113 | if (isOutOfFlowPositioned()) { |
| 1114 | PositionedLayoutConstraints constraints(*this, LogicalBoxAxis::Inline); |
| 1115 | return constraints.containingSize(); |
| 1116 | } |
| 1117 | if (isHorizontalWritingMode() == containingBlock()->isHorizontalWritingMode()) |
| 1118 | return containingBlockLogicalWidthForContent(); |
| 1119 | return perpendicularContainingBlockLogicalHeight(); |
| 1120 | }; |
| 1121 | |
| 1122 | auto percentageOrCalc = [&](Style::IsPercentageOrCalc auto const& logicalWidth) { |
| 1123 | // FIXME: Handle cases when containing block width is calculated or viewport percent. |
| 1124 | // https://bugs.webkit.org/show_bug.cgi?id=91071 |
| 1125 | if (auto containerWidth = calculateContainerWidth(); containerWidth > 0 || (!containerWidth && (containingBlock()->style().logicalWidth().isSpecified()))) { |
| 1126 | if constexpr (Style::IsPercentage<std::decay_t<decltype(logicalWidth)>>) |
| 1127 | return adjustContentBoxLogicalWidthForBoxSizing(Style::evaluate<LayoutUnit>(logicalWidth, containerWidth)); |
| 1128 | else |
| 1129 | return adjustContentBoxLogicalWidthForBoxSizing(Style::evaluate<LayoutUnit>(logicalWidth, containerWidth, style().usedZoomForLength())); |
| 1130 | } |
| 1131 | return 0_lu; |
| 1132 | }; |
| 1133 | |
| 1134 | auto content = [&](const auto& keyword, const auto& availableLogicalWidth) { |
| 1135 | // FIXME: Handle cases when containing block width is calculated or viewport percent. |
| 1136 | // https://bugs.webkit.org/show_bug.cgi?id=91071 |
| 1137 | return computeIntrinsicLogicalWidthUsing(keyword, availableLogicalWidth, borderAndPaddingLogicalWidth()) - borderAndPaddingLogicalWidth(); |
| 1138 | }; |
| 1139 | |
| 1140 | return WTF::switchOn(logicalWidth, |
| 1141 | [&](const typename SizeType::Fixed& fixedLogicalWidth) -> LayoutUnit { |
| 1142 | return adjustContentBoxLogicalWidthForBoxSizing(fixedLogicalWidth); |
| 1143 | }, |
| 1144 | [&](const typename SizeType::Percentage& percentageLogicalWidth) -> LayoutUnit { |
| 1145 | return percentageOrCalc(percentageLogicalWidth); |
| 1146 | }, |
| 1147 | [&](const typename SizeType::Calc& calculatedLogicalWidth) -> LayoutUnit { |
| 1148 | return percentageOrCalc(calculatedLogicalWidth); |
| 1149 | }, |
| 1150 | [&](const CSS::Keyword::FitContent& keyword) -> LayoutUnit { |
| 1151 | return content(keyword, calculateContainerWidth()); |
| 1152 | }, |
| 1153 | [&](const CSS::Keyword::WebkitFillAvailable& keyword) -> LayoutUnit { |
| 1154 | return content(keyword, calculateContainerWidth()); |
| 1155 | }, |
| 1156 | [&](const CSS::Keyword::MinContent& keyword) -> LayoutUnit { |
| 1157 | // min-content/max-content don't need the availableLogicalWidth argument. |
| 1158 | return content(keyword, 0_lu); |
| 1159 | }, |
| 1160 | [&](const CSS::Keyword::MaxContent& keyword) -> LayoutUnit { |
| 1161 | // min-content/max-content don't need the availableLogicalWidth argument. |
| 1162 | return content(keyword, 0_lu); |
| 1163 | }, |
| 1164 | [&](const CSS::Keyword::Intrinsic&) -> LayoutUnit { |
| 1165 | return intrinsicLogicalWidth(); |
| 1166 | }, |
| 1167 | [&](const CSS::Keyword::MinIntrinsic&) -> LayoutUnit { |
| 1168 | return intrinsicLogicalWidth(); |
| 1169 | }, |
| 1170 | [&](const CSS::Keyword::Auto&) -> LayoutUnit { |
| 1171 | if constexpr (std::same_as<SizeType, Style::MinimumSize>) |
| 1172 | return 0_lu; |
| 1173 | else |
| 1174 | return intrinsicLogicalWidth(); |
| 1175 | }, |
| 1176 | [&](const CSS::Keyword::None&) -> LayoutUnit { |
| 1177 | return intrinsicLogicalWidth(); |
| 1178 | } |
| 1179 | ); |
| 1180 | } |
| 1181 | |
| 1182 | bool RenderReplaced::replacedMinMaxLogicalHeightComputesAsNone(const auto& logicalHeight, const auto& initialLogicalHeight) const |
| 1183 | { |
| 1184 | if (logicalHeight == initialLogicalHeight) |
| 1185 | return true; |
| 1186 | |
| 1187 | if (isGridItem() && logicalHeight.isPercentOrCalculated()) { |
| 1188 | if (auto gridAreaContentLogicalHeight = this->gridAreaContentLogicalHeight()) |
| 1189 | return !*gridAreaContentLogicalHeight; |
| 1190 | } |
| 1191 | |
| 1192 | // Make sure % min-height and % max-height resolve to none if the containing block has auto height. |
| 1193 | // Note that the "height" case for replaced elements was handled by hasReplacedLogicalHeight, which is why |
| 1194 | // min and max-height are the only ones handled here. |
| 1195 | // FIXME: For now we put in a quirk for Apple Books until we can move them to viewport units. |
| 1196 | #if PLATFORM(COCOA)(defined 1 && 1) |
| 1197 | // Allow min-max percentages in auto height blocks quirk. |
| 1198 | if (WTF::CocoaApplication::isAppleBooks()) |
| 1199 | return false; |
| 1200 | #endif |
| 1201 | if (CheckedPtr containingBlock = containingBlockForAutoHeightDetection(logicalHeight)) |
| 1202 | return containingBlock->hasAutoHeightOrContainingBlockWithAutoHeight(); |
| 1203 | return false; |
| 1204 | } |
| 1205 | |
| 1206 | bool RenderReplaced::replacedMinLogicalHeightComputesAsNone() const |
| 1207 | { |
| 1208 | return replacedMinMaxLogicalHeightComputesAsNone(style().logicalMinHeight(), Style::ComputedStyle::initialMinHeight()); |
| 1209 | } |
| 1210 | |
| 1211 | bool RenderReplaced::replacedMaxLogicalHeightComputesAsNone() const |
| 1212 | { |
| 1213 | return replacedMinMaxLogicalHeightComputesAsNone(style().logicalMaxHeight(), Style::ComputedStyle::initialMaxHeight()); |
| 1214 | } |
| 1215 | |
| 1216 | LayoutUnit RenderReplaced::computeReplacedLogicalHeightRespectingMinMaxHeight(LayoutUnit logicalHeight) const |
| 1217 | { |
| 1218 | if (shouldIgnoreLogicalMinMaxHeightSizes()) |
| 1219 | return logicalHeight; |
| 1220 | |
| 1221 | LayoutUnit minLogicalHeight; |
| 1222 | if (!replacedMinLogicalHeightComputesAsNone()) |
| 1223 | minLogicalHeight = computeReplacedLogicalHeightUsing(style().logicalMinHeight()); |
| 1224 | LayoutUnit maxLogicalHeight = logicalHeight; |
| 1225 | if (!replacedMaxLogicalHeightComputesAsNone()) |
| 1226 | maxLogicalHeight = computeReplacedLogicalHeightUsing(style().logicalMaxHeight()); |
| 1227 | return std::max(minLogicalHeight, std::min(logicalHeight, maxLogicalHeight)); |
| 1228 | } |
| 1229 | |
| 1230 | template<typename SizeType> |
| 1231 | LayoutUnit RenderReplaced::computeReplacedLogicalHeightUsingGeneric(const SizeType& logicalHeight) const |
| 1232 | { |
| 1233 | #if ASSERT_ENABLED0 |
| 1234 | // This function should get called with Style::MinimumSize/Style::MaximumSize only if replaced[Min|Max]LogicalHeightComputesAsNone |
| 1235 | // returns false, otherwise we should not try to compute those values as they may be incorrect. The caller should make sure this |
| 1236 | // condition holds before calling this function |
| 1237 | if constexpr (std::same_as<SizeType, Style::MinimumSize>) |
| 1238 | ASSERT(!replacedMinLogicalHeightComputesAsNone())((void)0); |
| 1239 | else if constexpr (std::same_as<SizeType, Style::MaximumSize>) |
| 1240 | ASSERT(!replacedMaxLogicalHeightComputesAsNone())((void)0); |
| 1241 | #endif |
| 1242 | |
| 1243 | auto percentageOrCalculated = [&](Style::IsPercentageOrCalc auto const& logicalHeight) { |
| 1244 | auto* container = isOutOfFlowPositioned() ? this->container() : containingBlock(); |
| 1245 | while (container && container->isAnonymousForPercentageResolution()) { |
| 1246 | // Stop at rendering context root. |
| 1247 | if (is<RenderView>(*container)) |
| 1248 | break; |
| 1249 | container = container->containingBlock(); |
| 1250 | } |
| 1251 | bool hasPerpendicularContainingBlock = container->isHorizontalWritingMode() != isHorizontalWritingMode(); |
| 1252 | std::optional<LayoutUnit> stretchedHeight; |
| 1253 | if (auto* block = dynamicDowncast<RenderBlock>(container)) { |
| 1254 | block->addPercentHeightDescendant(*const_cast<RenderReplaced*>(this)); |
| 1255 | if (auto usedFlexItemOverridingLogicalHeightForPercentageResolutionForFlex = (block->isFlexItem() ? downcast<RenderFlexibleBox>(block->parent())->usedFlexItemOverridingLogicalHeightForPercentageResolution(*block) : std::nullopt)) |
| 1256 | stretchedHeight = block->contentBoxLogicalHeight(*usedFlexItemOverridingLogicalHeightForPercentageResolutionForFlex); |
| 1257 | else if (auto usedChildOverridingLogicalHeightForGrid = (block->isGridItem() && !hasPerpendicularContainingBlock ? block->overridingBorderBoxLogicalHeight() : std::nullopt)) |
| 1258 | stretchedHeight = block->contentBoxLogicalHeight(*usedChildOverridingLogicalHeightForGrid); |
| 1259 | } |
| 1260 | |
| 1261 | // FIXME: This calculation is not patched for block-flow yet. |
| 1262 | // https://bugs.webkit.org/show_bug.cgi?id=46500 |
| 1263 | if (container->isOutOfFlowPositioned() |
| 1264 | && container->style().height().isAuto() |
| 1265 | && !(container->style().top().isAuto() || container->style().bottom().isAuto())) { |
| 1266 | auto& block = downcast<RenderBlock>(*container); |
| 1267 | auto computedValues = block.computeLogicalHeight(block.logicalHeight(), 0); |
| 1268 | LayoutUnit borderPaddingAdjustment = isOutOfFlowPositioned() ? block.borderLogicalHeight() : block.borderAndPaddingLogicalHeight(); |
| 1269 | LayoutUnit newContentHeight = computedValues.extent - block.scrollbarLogicalHeight() - borderPaddingAdjustment; |
| 1270 | |
| 1271 | if constexpr (Style::IsPercentage<std::decay_t<decltype(logicalHeight)>>) |
| 1272 | return adjustContentBoxLogicalHeightForBoxSizing(Style::evaluate<LayoutUnit>(logicalHeight, newContentHeight)); |
| 1273 | else |
| 1274 | return adjustContentBoxLogicalHeightForBoxSizing(Style::evaluate<LayoutUnit>(logicalHeight, newContentHeight, style().usedZoomForLength())); |
| 1275 | } |
| 1276 | |
| 1277 | LayoutUnit availableHeight; |
| 1278 | if (isOutOfFlowPositioned()) { |
| 1279 | PositionedLayoutConstraints constraints(*this, LogicalBoxAxis::Block); |
| 1280 | availableHeight = constraints.containingSize(); |
| 1281 | } else if (stretchedHeight) |
| 1282 | availableHeight = stretchedHeight.value(); |
| 1283 | else if (auto gridAreaLogicalHeight = isGridItem() ? this->gridAreaContentLogicalHeight() : std::nullopt; gridAreaLogicalHeight && *gridAreaLogicalHeight) |
| 1284 | availableHeight = gridAreaLogicalHeight->value(); |
| 1285 | else { |
| 1286 | availableHeight = hasPerpendicularContainingBlock ? containingBlockLogicalWidthForContent() : containingBlockLogicalHeightForContent(AvailableLogicalHeightType::IncludeMarginBorderPadding); |
| 1287 | // It is necessary to use the border-box to match WinIE's broken |
| 1288 | // box model. This is essential for sizing inside |
| 1289 | // table cells using percentage heights. |
| 1290 | // FIXME: This needs to be made block-flow-aware. If the cell and image are perpendicular block-flows, this isn't right. |
| 1291 | // https://bugs.webkit.org/show_bug.cgi?id=46997 |
| 1292 | while (container && !is<RenderView>(*container) |
| 1293 | && (container->style().logicalHeight().isAuto() || container->style().logicalHeight().isPercentOrCalculated())) { |
| 1294 | if (container->isRenderTableCell()) { |
| 1295 | // Don't let table cells squeeze percent-height replaced elements |
| 1296 | // <http://bugs.webkit.org/show_bug.cgi?id=15359> |
| 1297 | availableHeight = std::max(availableHeight, intrinsicLogicalHeight()); |
| 1298 | if constexpr (Style::IsPercentage<std::decay_t<decltype(logicalHeight)>>) |
| 1299 | return Style::evaluate<LayoutUnit>(logicalHeight, availableHeight - borderAndPaddingLogicalHeight()); |
| 1300 | else |
| 1301 | return Style::evaluate<LayoutUnit>(logicalHeight, availableHeight - borderAndPaddingLogicalHeight(), style().usedZoomForLength()); |
| 1302 | } |
| 1303 | downcast<RenderBlock>(*container).addPercentHeightDescendant(const_cast<RenderReplaced&>(*this)); |
| 1304 | container = container->containingBlock(); |
| 1305 | } |
| 1306 | } |
| 1307 | |
| 1308 | if constexpr (Style::IsPercentage<std::decay_t<decltype(logicalHeight)>>) |
| 1309 | return adjustContentBoxLogicalHeightForBoxSizing(Style::evaluate<LayoutUnit>(logicalHeight, availableHeight)); |
| 1310 | else |
| 1311 | return adjustContentBoxLogicalHeightForBoxSizing(Style::evaluate<LayoutUnit>(logicalHeight, availableHeight, style().usedZoomForLength())); |
| 1312 | }; |
| 1313 | |
| 1314 | auto content = [&] { |
| 1315 | return adjustContentBoxLogicalHeightForBoxSizing(computeIntrinsicLogicalContentHeightUsing(logicalHeight, intrinsicLogicalHeight(), borderAndPaddingLogicalHeight())); |
| 1316 | }; |
| 1317 | |
| 1318 | return WTF::switchOn(logicalHeight, |
| 1319 | [&](const typename SizeType::Fixed& fixedLogicalHeight) -> LayoutUnit { |
| 1320 | return adjustContentBoxLogicalHeightForBoxSizing(LayoutUnit { fixedLogicalHeight.resolveZoom(style().usedZoomForLength()) }); |
| 1321 | }, |
| 1322 | [&](const typename SizeType::Percentage& percentageLogicalHeight) -> LayoutUnit { |
| 1323 | return percentageOrCalculated(percentageLogicalHeight); |
| 1324 | }, |
| 1325 | [&](const typename SizeType::Calc& calculatedLogicalHeight) -> LayoutUnit { |
| 1326 | return percentageOrCalculated(calculatedLogicalHeight); |
| 1327 | }, |
| 1328 | [&](const CSS::Keyword::FitContent&) -> LayoutUnit { |
| 1329 | auto [transferredMinLogicalHeight, transferredMaxLogicalHeight] = computeMinMaxLogicalHeightFromAspectRatio(); |
| 1330 | return std::clamp(content(), transferredMinLogicalHeight, transferredMaxLogicalHeight); |
| 1331 | }, |
| 1332 | [&](const CSS::Keyword::WebkitFillAvailable&) -> LayoutUnit { |
| 1333 | return content(); |
| 1334 | }, |
| 1335 | [&](const CSS::Keyword::MinContent&) -> LayoutUnit { |
| 1336 | auto [transferredMinLogicalHeight, transferredMaxLogicalHeight] = computeMinMaxLogicalHeightFromAspectRatio(); |
| 1337 | return std::clamp(content(), transferredMinLogicalHeight, transferredMaxLogicalHeight); |
| 1338 | }, |
| 1339 | [&](const CSS::Keyword::MaxContent&) -> LayoutUnit { |
| 1340 | auto [transferredMinLogicalHeight, transferredMaxLogicalHeight] = computeMinMaxLogicalHeightFromAspectRatio(); |
| 1341 | return std::clamp(content(), transferredMinLogicalHeight, transferredMaxLogicalHeight); |
| 1342 | }, |
| 1343 | [&](const CSS::Keyword::Intrinsic&) -> LayoutUnit { |
| 1344 | return intrinsicLogicalHeight(); |
| 1345 | }, |
| 1346 | [&](const CSS::Keyword::MinIntrinsic&) -> LayoutUnit { |
| 1347 | return intrinsicLogicalHeight(); |
| 1348 | }, |
| 1349 | [&](const CSS::Keyword::Auto&) -> LayoutUnit { |
| 1350 | if constexpr (std::same_as<SizeType, Style::MinimumSize>) |
| 1351 | return adjustContentBoxLogicalHeightForBoxSizing(LayoutUnit { 0 }); |
| 1352 | else |
| 1353 | return intrinsicLogicalHeight(); |
| 1354 | }, |
| 1355 | [&](const CSS::Keyword::None&) -> LayoutUnit { |
| 1356 | return intrinsicLogicalHeight(); |
| 1357 | } |
| 1358 | ); |
| 1359 | } |
| 1360 | |
| 1361 | LayoutUnit RenderReplaced::computeReplacedLogicalHeightUsing(const Style::PreferredSize& logicalHeight) const |
| 1362 | { |
| 1363 | return computeReplacedLogicalHeightUsingGeneric(logicalHeight); |
| 1364 | } |
| 1365 | |
| 1366 | LayoutUnit RenderReplaced::computeReplacedLogicalHeightUsing(const Style::MinimumSize& logicalHeight) const |
| 1367 | { |
| 1368 | return computeReplacedLogicalHeightUsingGeneric(logicalHeight); |
| 1369 | } |
| 1370 | |
| 1371 | LayoutUnit RenderReplaced::computeReplacedLogicalHeightUsing(const Style::MaximumSize& logicalHeight) const |
| 1372 | { |
| 1373 | return computeReplacedLogicalHeightUsingGeneric(logicalHeight); |
| 1374 | } |
| 1375 | |
| 1376 | } |