| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * Copyright (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved. |
| * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #include "config.h" |
| #include "RenderReplaced.h" |
| |
| #include "DocumentMarkerController.h" |
| #include "ElementRuleCollector.h" |
| #include "FloatRoundedRect.h" |
| #include "Frame.h" |
| #include "GraphicsContext.h" |
| #include "HTMLElement.h" |
| #include "HTMLImageElement.h" |
| #include "HTMLParserIdioms.h" |
| #include "HighlightData.h" |
| #include "HighlightRegister.h" |
| #include "InlineIteratorBox.h" |
| #include "InlineIteratorLineBox.h" |
| #include "LayoutRepainter.h" |
| #include "LineSelection.h" |
| #include "RenderBlock.h" |
| #include "RenderFragmentedFlow.h" |
| #include "RenderImage.h" |
| #include "RenderLayer.h" |
| #include "RenderTheme.h" |
| #include "RenderView.h" |
| #include "RenderedDocumentMarker.h" |
| #include "RuntimeEnabledFeatures.h" |
| #include "Settings.h" |
| #include "VisiblePosition.h" |
| #include <wtf/IsoMallocInlines.h> |
| #include <wtf/StackStats.h> |
| |
| namespace WebCore { |
| |
| WTF_MAKE_ISO_ALLOCATED_IMPL(RenderReplaced); |
| |
| const int cDefaultWidth = 300; |
| const int cDefaultHeight = 150; |
| |
| RenderReplaced::RenderReplaced(Element& element, RenderStyle&& style) |
| : RenderBox(element, WTFMove(style), RenderReplacedFlag) |
| , m_intrinsicSize(cDefaultWidth, cDefaultHeight) |
| { |
| setReplacedOrInlineBlock(true); |
| } |
| |
| RenderReplaced::RenderReplaced(Element& element, RenderStyle&& style, const LayoutSize& intrinsicSize) |
| : RenderBox(element, WTFMove(style), RenderReplacedFlag) |
| , m_intrinsicSize(intrinsicSize) |
| { |
| setReplacedOrInlineBlock(true); |
| } |
| |
| RenderReplaced::RenderReplaced(Document& document, RenderStyle&& style, const LayoutSize& intrinsicSize) |
| : RenderBox(document, WTFMove(style), RenderReplacedFlag) |
| , m_intrinsicSize(intrinsicSize) |
| { |
| setReplacedOrInlineBlock(true); |
| } |
| |
| RenderReplaced::~RenderReplaced() = default; |
| |
| void RenderReplaced::willBeDestroyed() |
| { |
| if (!renderTreeBeingDestroyed() && parent()) |
| parent()->dirtyLinesFromChangedChild(*this); |
| |
| RenderBox::willBeDestroyed(); |
| } |
| |
| void RenderReplaced::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) |
| { |
| RenderBox::styleDidChange(diff, oldStyle); |
| auto previousEffectiveZoom = oldStyle ? oldStyle->effectiveZoom() : RenderStyle::initialZoom(); |
| if (previousEffectiveZoom != style().effectiveZoom()) |
| intrinsicSizeChanged(); |
| } |
| |
| void RenderReplaced::layout() |
| { |
| StackStats::LayoutCheckPoint layoutCheckPoint; |
| ASSERT(needsLayout()); |
| |
| LayoutRepainter repainter(*this, checkForRepaintDuringLayout()); |
| |
| LayoutRect oldContentRect = replacedContentRect(); |
| |
| setHeight(minimumReplacedHeight()); |
| |
| updateLogicalWidth(); |
| updateLogicalHeight(); |
| |
| clearOverflow(); |
| addVisualEffectOverflow(); |
| updateLayerTransform(); |
| invalidateBackgroundObscurationStatus(); |
| |
| repainter.repaintAfterLayout(); |
| clearNeedsLayout(); |
| |
| if (replacedContentRect() != oldContentRect) |
| setPreferredLogicalWidthsDirty(true); |
| } |
| |
| void RenderReplaced::intrinsicSizeChanged() |
| { |
| int scaledWidth = static_cast<int>(cDefaultWidth * style().effectiveZoom()); |
| int scaledHeight = static_cast<int>(cDefaultHeight * style().effectiveZoom()); |
| m_intrinsicSize = IntSize(scaledWidth, scaledHeight); |
| setNeedsLayoutAndPrefWidthsRecalc(); |
| } |
| |
| bool RenderReplaced::shouldDrawSelectionTint() const |
| { |
| return selectionState() != HighlightState::None && !document().printing(); |
| } |
| |
| inline static bool draggedContentContainsReplacedElement(const Vector<RenderedDocumentMarker*>& markers, const Element& element) |
| { |
| for (auto* marker : markers) { |
| if (std::get<RefPtr<Node>>(marker->data()) == &element) |
| return true; |
| } |
| return false; |
| } |
| |
| Color RenderReplaced::calculateHighlightColor() const |
| { |
| HighlightData highlightData; |
| #if ENABLE(APP_HIGHLIGHTS) |
| if (auto appHighlightRegister = document().appHighlightRegisterIfExists()) { |
| if (appHighlightRegister->highlightsVisibility() == HighlightVisibility::Visible) { |
| for (auto& highlight : appHighlightRegister->map()) { |
| for (auto& rangeData : highlight.value->rangesData()) { |
| if (!highlightData.setRenderRange(rangeData)) |
| continue; |
| |
| auto state = highlightData.highlightStateForRenderer(*this); |
| if (!isHighlighted(state, highlightData)) |
| continue; |
| |
| OptionSet<StyleColorOptions> styleColorOptions = { StyleColorOptions::UseSystemAppearance }; |
| return theme().annotationHighlightColor(styleColorOptions); |
| } |
| } |
| } |
| } |
| #endif |
| if (RuntimeEnabledFeatures::sharedFeatures().highlightAPIEnabled()) { |
| if (auto highlightRegister = document().highlightRegisterIfExists()) { |
| for (auto& highlight : highlightRegister->map()) { |
| for (auto& rangeData : highlight.value->rangesData()) { |
| if (!highlightData.setRenderRange(rangeData)) |
| continue; |
| |
| auto state = highlightData.highlightStateForRenderer(*this); |
| if (!isHighlighted(state, highlightData)) |
| continue; |
| |
| if (auto highlightStyle = getUncachedPseudoStyle({ PseudoId::Highlight, highlight.key }, &style())) |
| return highlightStyle->backgroundColor(); |
| } |
| } |
| } |
| } |
| if (document().settings().scrollToTextFragmentEnabled()) { |
| if (auto highlightRegister = document().fragmentHighlightRegisterIfExists()) { |
| for (auto& highlight : highlightRegister->map()) { |
| for (auto& rangeData : highlight.value->rangesData()) { |
| if (!highlightData.setRenderRange(rangeData)) |
| continue; |
| |
| auto state = highlightData.highlightStateForRenderer(*this); |
| if (!isHighlighted(state, highlightData)) |
| continue; |
| |
| OptionSet<StyleColorOptions> styleColorOptions = { StyleColorOptions::UseSystemAppearance }; |
| return theme().annotationHighlightColor(styleColorOptions); |
| } |
| } |
| } |
| } |
| return Color(); |
| } |
| |
| void RenderReplaced::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| { |
| if (!shouldPaint(paintInfo, paintOffset)) |
| return; |
| |
| LayoutPoint adjustedPaintOffset = paintOffset + location(); |
| |
| if (paintInfo.phase == PaintPhase::EventRegion) { |
| if (visibleToHitTesting()) { |
| auto borderRect = LayoutRect(adjustedPaintOffset, size()); |
| auto borderRegion = approximateAsRegion(style().getRoundedBorderFor(borderRect)); |
| paintInfo.eventRegionContext->unite(borderRegion, *this, style()); |
| } |
| return; |
| } |
| |
| SetLayoutNeededForbiddenScope scope(*this); |
| |
| GraphicsContextStateSaver savedGraphicsContext(paintInfo.context(), false); |
| if (element() && element()->parentOrShadowHostElement()) { |
| auto* parentContainer = element()->parentOrShadowHostElement(); |
| ASSERT(parentContainer); |
| if (draggedContentContainsReplacedElement(document().markers().markersFor(*parentContainer, DocumentMarker::DraggedContent), *element())) { |
| savedGraphicsContext.save(); |
| paintInfo.context().setAlpha(0.25); |
| } |
| } |
| |
| if (hasVisibleBoxDecorations() && paintInfo.phase == PaintPhase::Foreground) |
| paintBoxDecorations(paintInfo, adjustedPaintOffset); |
| |
| if (paintInfo.phase == PaintPhase::Mask) { |
| paintMask(paintInfo, adjustedPaintOffset); |
| return; |
| } |
| |
| LayoutRect paintRect = LayoutRect(adjustedPaintOffset, size()); |
| if (paintInfo.phase == PaintPhase::Outline || paintInfo.phase == PaintPhase::SelfOutline) { |
| if (style().outlineWidth()) |
| paintOutline(paintInfo, paintRect); |
| return; |
| } |
| |
| if (paintInfo.phase != PaintPhase::Foreground && paintInfo.phase != PaintPhase::Selection) |
| return; |
| |
| if (!paintInfo.shouldPaintWithinRoot(*this)) |
| return; |
| |
| Color highlightColor; |
| if (!document().printing() && !paintInfo.paintBehavior.contains(PaintBehavior::ExcludeSelection)) |
| highlightColor = calculateHighlightColor(); |
| |
| bool drawSelectionTint = shouldDrawSelectionTint(); |
| if (paintInfo.phase == PaintPhase::Selection) { |
| if (selectionState() == HighlightState::None) |
| return; |
| drawSelectionTint = false; |
| } |
| |
| bool completelyClippedOut = false; |
| if (style().hasBorderRadius()) { |
| completelyClippedOut = size().isEmpty(); |
| if (!completelyClippedOut) { |
| // Push a clip if we have a border radius, since we want to round the foreground content that gets painted. |
| paintInfo.context().save(); |
| auto pixelSnappedRoundedRect = style().getRoundedInnerBorderFor(paintRect, |
| paddingTop() + borderTop(), paddingBottom() + borderBottom(), paddingLeft() + borderLeft(), paddingRight() + borderRight(), true, true).pixelSnappedRoundedRectForPainting(document().deviceScaleFactor()); |
| clipRoundedInnerRect(paintInfo.context(), paintRect, pixelSnappedRoundedRect); |
| } |
| } |
| |
| if (!completelyClippedOut) { |
| paintReplaced(paintInfo, adjustedPaintOffset); |
| |
| if (style().hasBorderRadius()) |
| paintInfo.context().restore(); |
| } |
| |
| // The selection tint never gets clipped by border-radius rounding, since we want it to run right up to the edges of |
| // surrounding content. |
| if (drawSelectionTint) { |
| LayoutRect selectionPaintingRect = localSelectionRect(); |
| selectionPaintingRect.moveBy(adjustedPaintOffset); |
| paintInfo.context().fillRect(snappedIntRect(selectionPaintingRect), selectionBackgroundColor()); |
| } |
| |
| if (highlightColor.isVisible()) { |
| auto selectionPaintingRect = localSelectionRect(false); |
| selectionPaintingRect.moveBy(adjustedPaintOffset); |
| paintInfo.context().fillRect(snappedIntRect(selectionPaintingRect), highlightColor); |
| } |
| } |
| |
| bool RenderReplaced::shouldPaint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| { |
| if ((paintInfo.paintBehavior.contains(PaintBehavior::ExcludeSelection)) && isSelected()) |
| return false; |
| |
| if (paintInfo.phase != PaintPhase::Foreground |
| && paintInfo.phase != PaintPhase::Outline |
| && paintInfo.phase != PaintPhase::SelfOutline |
| && paintInfo.phase != PaintPhase::Selection |
| && paintInfo.phase != PaintPhase::Mask |
| && paintInfo.phase != PaintPhase::EventRegion) |
| return false; |
| |
| if (!paintInfo.shouldPaintWithinRoot(*this)) |
| return false; |
| |
| // if we're invisible or haven't received a layout yet, then just bail. |
| if (style().visibility() != Visibility::Visible) |
| return false; |
| |
| LayoutPoint adjustedPaintOffset = paintOffset + location(); |
| |
| // Early exit if the element touches the edges. |
| LayoutUnit top = adjustedPaintOffset.y() + visualOverflowRect().y(); |
| LayoutUnit bottom = adjustedPaintOffset.y() + visualOverflowRect().maxY(); |
| if (isSelected() && m_inlineBoxWrapper) { |
| const LegacyRootInlineBox& rootBox = m_inlineBoxWrapper->root(); |
| LayoutUnit selTop = paintOffset.y() + rootBox.selectionTop(); |
| LayoutUnit selBottom = paintOffset.y() + selTop + rootBox.selectionHeight(); |
| top = std::min(selTop, top); |
| bottom = std::max(selBottom, bottom); |
| } |
| |
| LayoutRect localRepaintRect = paintInfo.rect; |
| if (adjustedPaintOffset.x() + visualOverflowRect().x() >= localRepaintRect.maxX() || adjustedPaintOffset.x() + visualOverflowRect().maxX() <= localRepaintRect.x()) |
| return false; |
| |
| if (top >= localRepaintRect.maxY() || bottom <= localRepaintRect.y()) |
| return false; |
| |
| return true; |
| } |
| |
| static inline RenderBlock* firstContainingBlockWithLogicalWidth(const RenderReplaced* replaced) |
| { |
| // We have to lookup the containing block, which has an explicit width, which must not be equal to our direct containing block. |
| // If the embedded document appears _after_ we performed the initial layout, our intrinsic size is 300x150. If our containing |
| // block doesn't provide an explicit width, it's set to the 300 default, coming from the initial layout run. |
| RenderBlock* containingBlock = replaced->containingBlock(); |
| if (!containingBlock) |
| return 0; |
| |
| for (; containingBlock && !is<RenderView>(*containingBlock) && !containingBlock->isBody(); containingBlock = containingBlock->containingBlock()) { |
| if (containingBlock->style().logicalWidth().isSpecified()) |
| return containingBlock; |
| } |
| |
| return 0; |
| } |
| |
| bool RenderReplaced::hasReplacedLogicalWidth() const |
| { |
| if (style().logicalWidth().isSpecified()) |
| return true; |
| |
| if (style().logicalWidth().isAuto()) |
| return false; |
| |
| return firstContainingBlockWithLogicalWidth(this); |
| } |
| |
| bool RenderReplaced::hasReplacedLogicalHeight() const |
| { |
| if (style().logicalHeight().isAuto()) |
| return false; |
| |
| if (style().logicalHeight().isFixed()) |
| return true; |
| |
| if (style().logicalHeight().isPercentOrCalculated()) |
| return !hasAutoHeightOrContainingBlockWithAutoHeight(); |
| |
| if (style().logicalHeight().isIntrinsic()) |
| return !style().hasAspectRatio(); |
| |
| return false; |
| } |
| |
| bool RenderReplaced::setNeedsLayoutIfNeededAfterIntrinsicSizeChange() |
| { |
| setPreferredLogicalWidthsDirty(true); |
| |
| // If the actual area occupied by the image has changed and it is not constrained by style then a layout is required. |
| bool imageSizeIsConstrained = style().logicalWidth().isSpecified() && style().logicalHeight().isSpecified() && !style().logicalMinWidth().isIntrinsic() && !style().logicalMaxWidth().isIntrinsic(); |
| |
| // FIXME: We only need to recompute the containing block's preferred size |
| // if the containing block's size depends on the image's size (i.e., the container uses shrink-to-fit sizing). |
| // There's no easy way to detect that shrink-to-fit is needed, always force a layout. |
| bool containingBlockNeedsToRecomputePreferredSize = |
| style().logicalWidth().isPercentOrCalculated() |
| || style().logicalMaxWidth().isPercentOrCalculated() |
| || style().logicalMinWidth().isPercentOrCalculated(); |
| |
| // Flex layout algorithm uses the intrinsic image width/height even if width/height are specified. |
| if (!imageSizeIsConstrained || containingBlockNeedsToRecomputePreferredSize || isFlexItem()) { |
| setNeedsLayout(); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| void RenderReplaced::computeAspectRatioInformationForRenderBox(RenderBox* contentRenderer, FloatSize& constrainedSize, double& intrinsicRatio) const |
| { |
| FloatSize intrinsicSize; |
| if (shouldApplySizeContainment()) |
| RenderReplaced::computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio); |
| else if (contentRenderer) { |
| contentRenderer->computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio); |
| |
| if (style().aspectRatioType() == AspectRatioType::Ratio || (style().aspectRatioType() == AspectRatioType::AutoAndRatio && !intrinsicRatio)) |
| intrinsicRatio = style().aspectRatioWidth() / style().aspectRatioHeight(); |
| |
| // Handle zoom & vertical writing modes here, as the embedded document doesn't know about them. |
| intrinsicSize.scale(style().effectiveZoom()); |
| |
| if (is<RenderImage>(*this)) |
| intrinsicSize.scale(downcast<RenderImage>(*this).imageDevicePixelRatio()); |
| |
| // Update our intrinsic size to match what the content renderer has computed, so that when we |
| // constrain the size below, the correct intrinsic size will be obtained for comparison against |
| // min and max widths. |
| if (intrinsicRatio && !intrinsicSize.isZero()) |
| m_intrinsicSize = LayoutSize(intrinsicSize); |
| |
| if (!isHorizontalWritingMode()) { |
| if (intrinsicRatio) |
| intrinsicRatio = 1 / intrinsicRatio; |
| intrinsicSize = intrinsicSize.transposedSize(); |
| } |
| } else { |
| computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio); |
| if (intrinsicRatio && !intrinsicSize.isZero()) |
| m_intrinsicSize = LayoutSize(isHorizontalWritingMode() ? intrinsicSize : intrinsicSize.transposedSize()); |
| } |
| |
| // Now constrain the intrinsic size along each axis according to minimum and maximum width/heights along the |
| // opposite axis. So for example a maximum width that shrinks our width will result in the height we compute here |
| // having to shrink in order to preserve the aspect ratio. Because we compute these values independently along |
| // each axis, the final returned size may in fact not preserve the aspect ratio. |
| // FIXME: In the long term, it might be better to just return this code more to the way it used to be before this |
| // function was added, since all it has done is make the code more unclear. |
| constrainedSize = intrinsicSize; |
| if (intrinsicRatio && !intrinsicSize.isEmpty() && style().logicalWidth().isAuto() && style().logicalHeight().isAuto()) { |
| // We can't multiply or divide by 'intrinsicRatio' here, it breaks tests, like fast/images/zoomed-img-size.html, which |
| // can only be fixed once subpixel precision is available for things like intrinsicWidth/Height - which include zoom! |
| constrainedSize.setWidth(RenderBox::computeReplacedLogicalHeight() * intrinsicSize.width() / intrinsicSize.height()); |
| constrainedSize.setHeight(RenderBox::computeReplacedLogicalWidth() * intrinsicSize.height() / intrinsicSize.width()); |
| } |
| } |
| |
| LayoutRect RenderReplaced::replacedContentRect(const LayoutSize& intrinsicSize) const |
| { |
| LayoutRect contentRect = contentBoxRect(); |
| if (intrinsicSize.isEmpty()) |
| return contentRect; |
| |
| ObjectFit objectFit = style().objectFit(); |
| |
| LayoutRect finalRect = contentRect; |
| switch (objectFit) { |
| case ObjectFit::Contain: |
| case ObjectFit::ScaleDown: |
| case ObjectFit::Cover: |
| finalRect.setSize(finalRect.size().fitToAspectRatio(intrinsicSize, objectFit == ObjectFit::Cover ? AspectRatioFitGrow : AspectRatioFitShrink)); |
| if (objectFit != ObjectFit::ScaleDown || finalRect.width() <= intrinsicSize.width()) |
| break; |
| FALLTHROUGH; |
| case ObjectFit::None: |
| finalRect.setSize(intrinsicSize); |
| break; |
| case ObjectFit::Fill: |
| break; |
| } |
| |
| LengthPoint objectPosition = style().objectPosition(); |
| |
| LayoutUnit xOffset = minimumValueForLength(objectPosition.x(), contentRect.width() - finalRect.width()); |
| LayoutUnit yOffset = minimumValueForLength(objectPosition.y(), contentRect.height() - finalRect.height()); |
| |
| finalRect.move(xOffset, yOffset); |
| |
| return finalRect; |
| } |
| |
| double RenderReplaced::computeIntrinsicAspectRatio() const |
| { |
| double intrinsicRatio; |
| FloatSize intrinsicSize; |
| computeAspectRatioInformationForRenderBox(embeddedContentBox(), intrinsicSize, intrinsicRatio); |
| return intrinsicRatio; |
| } |
| |
| RoundedRect RenderReplaced::roundedContentBoxRect() const |
| { |
| return style().getRoundedInnerBorderFor(borderBoxRect(), |
| borderTop() + paddingTop(), borderBottom() + paddingBottom(), |
| borderLeft() + paddingLeft(), borderRight() + paddingRight()); |
| } |
| |
| void RenderReplaced::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio) const |
| { |
| // If there's an embeddedContentBox() of a remote, referenced document available, this code-path should never be used. |
| ASSERT(!embeddedContentBox() || shouldApplySizeContainment()); |
| intrinsicSize = FloatSize(intrinsicLogicalWidth(), intrinsicLogicalHeight()); |
| |
| if (style().hasAspectRatio()) { |
| intrinsicRatio = style().logicalAspectRatio(); |
| if (style().aspectRatioType() == AspectRatioType::Ratio) |
| return; |
| } |
| // Figure out if we need to compute an intrinsic ratio. |
| if (!hasIntrinsicAspectRatio()) |
| return; |
| |
| if (intrinsicSize.isEmpty()) |
| return; |
| |
| intrinsicRatio = intrinsicSize.width() / intrinsicSize.height(); |
| } |
| |
| LayoutUnit RenderReplaced::computeConstrainedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const |
| { |
| if (shouldComputePreferred == ComputePreferred) |
| return computeReplacedLogicalWidthRespectingMinMaxWidth(0_lu, ComputePreferred); |
| |
| // The aforementioned 'constraint equation' used for block-level, non-replaced |
| // elements in normal flow: |
| // 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + |
| // 'padding-right' + 'border-right-width' + 'margin-right' = width of |
| // containing block |
| LayoutUnit logicalWidth = containingBlock()->availableLogicalWidth(); |
| |
| // This solves above equation for 'width' (== logicalWidth). |
| LayoutUnit marginStart = minimumValueForLength(style().marginStart(), logicalWidth); |
| LayoutUnit marginEnd = minimumValueForLength(style().marginEnd(), logicalWidth); |
| |
| // FIXME: This expression does not align with the comment above, which is quoting https://www.w3.org/TR/CSS22/visudet.html#blockwidth. |
| logicalWidth = std::max(0_lu, (logicalWidth - (marginStart + marginEnd + borderLeft() + borderRight()))); |
| return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth, shouldComputePreferred); |
| } |
| |
| static inline LayoutUnit resolveWidthForRatio(LayoutUnit borderAndPaddingLogicalHeight, LayoutUnit borderAndPaddingLogicalWidth, LayoutUnit logicalHeight, double aspectRatio, BoxSizing boxSizing) |
| { |
| if (boxSizing == BoxSizing::BorderBox) |
| return LayoutUnit((logicalHeight + borderAndPaddingLogicalHeight) * aspectRatio) - borderAndPaddingLogicalWidth; |
| return LayoutUnit(logicalHeight * aspectRatio); |
| } |
| |
| static inline bool hasIntrinsicSize(RenderBox*contentRenderer, bool hasIntrinsicWidth, bool hasIntrinsicHeight ) |
| { |
| if (hasIntrinsicWidth && hasIntrinsicHeight) |
| return true; |
| if (hasIntrinsicWidth || hasIntrinsicHeight) |
| return contentRenderer && contentRenderer->isSVGRootOrLegacySVGRoot(); |
| return false; |
| } |
| |
| LayoutUnit RenderReplaced::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const |
| { |
| if (style().logicalWidth().isSpecified() || style().logicalWidth().isIntrinsic()) |
| return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(MainOrPreferredSize, style().logicalWidth()), shouldComputePreferred); |
| |
| RenderBox* contentRenderer = embeddedContentBox(); |
| |
| // 10.3.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width |
| double intrinsicRatio = 0; |
| FloatSize constrainedSize; |
| computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio); |
| |
| if (style().logicalWidth().isAuto()) { |
| bool computedHeightIsAuto = style().logicalHeight().isAuto(); |
| bool hasIntrinsicWidth = constrainedSize.width() > 0; |
| bool hasIntrinsicHeight = constrainedSize.height() > 0; |
| |
| // 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 |
| // 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 |
| // width or height. There are also elements with intrinsic sizes but without intrinsic ratio (like an iframe). |
| if (intrinsicRatio && (isFlexItem() || isGridItem()) && hasOverridingLogicalHeight() && hasIntrinsicSize(contentRenderer, hasIntrinsicWidth, hasIntrinsicHeight)) |
| return computeReplacedLogicalWidthRespectingMinMaxWidth(overridingContentLogicalHeight() * intrinsicRatio, shouldComputePreferred); |
| |
| // 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'. |
| if (computedHeightIsAuto && hasIntrinsicWidth) |
| return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred); |
| |
| if (intrinsicRatio) { |
| // 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; |
| // 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 |
| // of 'width' is: (used height) * (intrinsic ratio) |
| if (!computedHeightIsAuto || (!hasIntrinsicWidth && hasIntrinsicHeight)) { |
| LayoutUnit estimatedUsedWidth = hasIntrinsicWidth ? LayoutUnit(constrainedSize.width()) : computeConstrainedLogicalWidth(shouldComputePreferred); |
| LayoutUnit logicalHeight = computeReplacedLogicalHeight(std::optional<LayoutUnit>(estimatedUsedWidth)); |
| BoxSizing boxSizing = style().hasAspectRatio() ? style().boxSizingForAspectRatio() : BoxSizing::ContentBox; |
| return computeReplacedLogicalWidthRespectingMinMaxWidth(resolveWidthForRatio(borderAndPaddingLogicalHeight(), borderAndPaddingLogicalWidth(), logicalHeight, intrinsicRatio, boxSizing), shouldComputePreferred); |
| } |
| |
| // If 'height' and 'width' both have computed values of 'auto' and the |
| // element has an intrinsic ratio but no intrinsic height or width, then |
| // the used value of 'width' is undefined in CSS 2.1. However, it is |
| // suggested that, if the containing block's width does not itself depend |
| // on the replaced element's width, then the used value of 'width' is |
| // calculated from the constraint equation used for block-level, |
| // non-replaced elements in normal flow. |
| if (computedHeightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight) |
| return computeConstrainedLogicalWidth(shouldComputePreferred); |
| } |
| |
| // 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'. |
| if (hasIntrinsicWidth) |
| return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred); |
| |
| // 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 |
| // 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. |
| // Note: We fall through and instead return intrinsicLogicalWidth() here - to preserve existing WebKit behavior, which might or might not be correct, or desired. |
| // 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) |
| // has no intrinsic size, which is wrong per CSS 2.1, but matches our behavior since a long time. |
| } |
| |
| return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), shouldComputePreferred); |
| } |
| |
| static inline LayoutUnit resolveHeightForRatio(LayoutUnit borderAndPaddingLogicalWidth, LayoutUnit borderAndPaddingLogicalHeight, LayoutUnit logicalWidth, double aspectRatio, BoxSizing boxSizing) |
| { |
| if (boxSizing == BoxSizing::BorderBox) |
| return LayoutUnit((logicalWidth + borderAndPaddingLogicalWidth) / aspectRatio) - borderAndPaddingLogicalHeight; |
| return LayoutUnit(logicalWidth / aspectRatio); |
| } |
| |
| LayoutUnit RenderReplaced::computeReplacedLogicalHeight(std::optional<LayoutUnit> estimatedUsedWidth) const |
| { |
| // 10.5 Content height: the 'height' property: http://www.w3.org/TR/CSS21/visudet.html#propdef-height |
| if (hasReplacedLogicalHeight()) |
| return computeReplacedLogicalHeightRespectingMinMaxHeight(computeReplacedLogicalHeightUsing(MainOrPreferredSize, style().logicalHeight())); |
| |
| RenderBox* contentRenderer = embeddedContentBox(); |
| |
| // 10.6.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-height |
| double intrinsicRatio = 0; |
| FloatSize constrainedSize; |
| computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio); |
| |
| bool widthIsAuto = style().logicalWidth().isAuto(); |
| bool hasIntrinsicHeight = constrainedSize.height() > 0; |
| bool hasIntrinsicWidth = constrainedSize.width() > 0; |
| |
| // See computeReplacedLogicalHeight() for a similar check for heights. |
| if (intrinsicRatio && (isFlexItem() || isGridItem()) && hasOverridingLogicalWidth() && hasIntrinsicSize(contentRenderer, hasIntrinsicWidth, hasIntrinsicHeight)) |
| return computeReplacedLogicalHeightRespectingMinMaxHeight(overridingContentLogicalWidth() / intrinsicRatio); |
| |
| // 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'. |
| if (widthIsAuto && hasIntrinsicHeight) |
| return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height()); |
| |
| // Otherwise, if 'height' has a computed value of 'auto', and the element has an intrinsic ratio then the used value of 'height' is: |
| // (used width) / (intrinsic ratio) |
| if (intrinsicRatio) { |
| LayoutUnit usedWidth = estimatedUsedWidth ? estimatedUsedWidth.value() : availableLogicalWidth(); |
| BoxSizing boxSizing = BoxSizing::ContentBox; |
| if (style().hasAspectRatio()) |
| boxSizing = style().boxSizingForAspectRatio(); |
| return computeReplacedLogicalHeightRespectingMinMaxHeight(resolveHeightForRatio(borderAndPaddingLogicalWidth(), borderAndPaddingLogicalHeight(), usedWidth, intrinsicRatio, boxSizing)); |
| } |
| |
| // 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'. |
| if (hasIntrinsicHeight) |
| return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height()); |
| |
| // 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 |
| // 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. |
| return computeReplacedLogicalHeightRespectingMinMaxHeight(intrinsicLogicalHeight()); |
| } |
| |
| void RenderReplaced::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const |
| { |
| minLogicalWidth = maxLogicalWidth = intrinsicLogicalWidth(); |
| } |
| |
| void RenderReplaced::computePreferredLogicalWidths() |
| { |
| ASSERT(preferredLogicalWidthsDirty()); |
| |
| // We cannot resolve any percent logical width here as the available logical |
| // width may not be set on our containing block. |
| if (style().logicalWidth().isPercentOrCalculated()) |
| computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth); |
| else |
| m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = computeReplacedLogicalWidth(ComputePreferred); |
| |
| const RenderStyle& styleToUse = style(); |
| if (styleToUse.logicalWidth().isPercentOrCalculated() || styleToUse.logicalMaxWidth().isPercentOrCalculated()) |
| m_minPreferredLogicalWidth = 0; |
| |
| if (styleToUse.logicalMinWidth().isFixed() && styleToUse.logicalMinWidth().value() > 0) { |
| m_maxPreferredLogicalWidth = std::max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse.logicalMinWidth())); |
| m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse.logicalMinWidth())); |
| } |
| |
| if (styleToUse.logicalMaxWidth().isFixed()) { |
| m_maxPreferredLogicalWidth = std::min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse.logicalMaxWidth())); |
| m_minPreferredLogicalWidth = std::min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse.logicalMaxWidth())); |
| } |
| |
| LayoutUnit borderAndPadding = borderAndPaddingLogicalWidth(); |
| m_minPreferredLogicalWidth += borderAndPadding; |
| m_maxPreferredLogicalWidth += borderAndPadding; |
| |
| setPreferredLogicalWidthsDirty(false); |
| } |
| |
| VisiblePosition RenderReplaced::positionForPoint(const LayoutPoint& point, const RenderFragmentContainer* fragment) |
| { |
| auto [top, bottom] = [&]() -> std::pair<float, float> { |
| if (auto run = InlineIterator::boxFor(*this)) { |
| auto lineBox = run->lineBox(); |
| auto lineContentTop = LayoutUnit { std::min(previousLineBoxContentBottomOrBorderAndPadding(*lineBox), lineBox->contentLogicalTop()) }; |
| return std::make_pair(lineContentTop, LineSelection::logicalBottom(*lineBox)); |
| } |
| return std::make_pair(logicalTop(), logicalBottom()); |
| }(); |
| |
| LayoutUnit blockDirectionPosition = isHorizontalWritingMode() ? point.y() + y() : point.x() + x(); |
| LayoutUnit lineDirectionPosition = isHorizontalWritingMode() ? point.x() + x() : point.y() + y(); |
| |
| if (blockDirectionPosition < top) |
| return createVisiblePosition(caretMinOffset(), Affinity::Downstream); // coordinates are above |
| |
| if (blockDirectionPosition >= bottom) |
| return createVisiblePosition(caretMaxOffset(), Affinity::Downstream); // coordinates are below |
| |
| if (element()) { |
| if (lineDirectionPosition <= logicalLeft() + (logicalWidth() / 2)) |
| return createVisiblePosition(0, Affinity::Downstream); |
| return createVisiblePosition(1, Affinity::Downstream); |
| } |
| |
| return RenderBox::positionForPoint(point, fragment); |
| } |
| |
| LayoutRect RenderReplaced::selectionRectForRepaint(const RenderLayerModelObject* repaintContainer, bool clipToVisibleContent) |
| { |
| ASSERT(!needsLayout()); |
| |
| if (!isSelected()) |
| return LayoutRect(); |
| |
| LayoutRect rect = localSelectionRect(); |
| if (clipToVisibleContent) |
| return computeRectForRepaint(rect, repaintContainer); |
| return localToContainerQuad(FloatRect(rect), repaintContainer).enclosingBoundingBox(); |
| } |
| |
| LayoutRect RenderReplaced::localSelectionRect(bool checkWhetherSelected) const |
| { |
| if (checkWhetherSelected && !isSelected()) |
| return LayoutRect(); |
| |
| if (!m_inlineBoxWrapper) |
| // We're a block-level replaced element. Just return our own dimensions. |
| return LayoutRect(LayoutPoint(), size()); |
| |
| const LegacyRootInlineBox& rootBox = m_inlineBoxWrapper->root(); |
| LayoutUnit newLogicalTop { rootBox.blockFlow().style().isFlippedBlocksWritingMode() ? m_inlineBoxWrapper->logicalBottom() - rootBox.selectionBottom() : rootBox.selectionTop() - m_inlineBoxWrapper->logicalTop() }; |
| if (rootBox.blockFlow().style().isHorizontalWritingMode()) |
| return LayoutRect(0_lu, newLogicalTop, width(), rootBox.selectionHeight()); |
| return LayoutRect(newLogicalTop, 0_lu, rootBox.selectionHeight(), height()); |
| } |
| |
| bool RenderReplaced::isSelected() const |
| { |
| return isHighlighted(selectionState(), view().selection()); |
| } |
| |
| bool RenderReplaced::isHighlighted(HighlightState state, const HighlightData& rangeData) const |
| { |
| if (state == HighlightState::None) |
| return false; |
| if (state == HighlightState::Inside) |
| return true; |
| |
| auto selectionStart = rangeData.startOffset(); |
| auto selectionEnd = rangeData.endOffset(); |
| if (state == HighlightState::Start) |
| return !selectionStart; |
| |
| unsigned end = element()->hasChildNodes() ? element()->countChildNodes() : 1; |
| if (state == HighlightState::End) |
| return selectionEnd == end; |
| if (state == HighlightState::Both) |
| return !selectionStart && selectionEnd == end; |
| ASSERT_NOT_REACHED(); |
| return false; |
| } |
| |
| LayoutRect RenderReplaced::clippedOverflowRect(const RenderLayerModelObject* repaintContainer, VisibleRectContext context) const |
| { |
| if (isInsideEntirelyHiddenLayer()) |
| return { }; |
| |
| // The selectionRect can project outside of the overflowRect, so take their union |
| // for repainting to avoid selection painting glitches. |
| LayoutRect r = unionRect(localSelectionRect(false), visualOverflowRect()); |
| // FIXME: layoutDelta needs to be applied in parts before/after transforms and |
| // repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308 |
| r.move(view().frameView().layoutContext().layoutDelta()); |
| return computeRect(r, repaintContainer, context); |
| } |
| |
| bool RenderReplaced::isContentLikelyVisibleInViewport() |
| { |
| if (!isVisibleIgnoringGeometry()) |
| return false; |
| |
| auto& frameView = view().frameView(); |
| auto visibleRect = LayoutRect(frameView.windowToContents(frameView.windowClipRect())); |
| auto contentRect = computeRectForRepaint(replacedContentRect(), nullptr); |
| |
| // Content rectangle may be empty because it is intrinsically sized and the content has not loaded yet. |
| if (contentRect.isEmpty() && (style().logicalWidth().isAuto() || style().logicalHeight().isAuto())) |
| return visibleRect.contains(contentRect.location()); |
| |
| return visibleRect.intersects(contentRect); |
| } |
| |
| bool RenderReplaced::needsPreferredWidthsRecalculation() const |
| { |
| // 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. |
| return (hasRelativeLogicalHeight() || (isGridItem() && hasStretchedLogicalHeight())) && style().logicalWidth().isAuto(); |
| } |
| |
| } |
