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/*
* 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 "InlineIteratorLine.h"
#include "LayoutRepainter.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)
{
setReplaced(true);
}
RenderReplaced::RenderReplaced(Element& element, RenderStyle&& style, const LayoutSize& intrinsicSize)
: RenderBox(element, WTFMove(style), RenderReplacedFlag)
, m_intrinsicSize(intrinsicSize)
{
setReplaced(true);
}
RenderReplaced::RenderReplaced(Document& document, RenderStyle&& style, const LayoutSize& intrinsicSize)
: RenderBox(document, WTFMove(style), RenderReplacedFlag)
, m_intrinsicSize(intrinsicSize)
{
setReplaced(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().appHighlightColor(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();
}
}
}
}
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, 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(*this))
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;
}
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(*this));
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(round((logicalHeight + borderAndPaddingLogicalHeight) * aspectRatio)) - borderAndPaddingLogicalWidth;
return LayoutUnit(round(logicalHeight * aspectRatio));
}
static inline bool hasIntrinsicSize(RenderBox*contentRenderer, bool hasIntrinsicWidth, bool hasIntrinsicHeight )
{
if (hasIntrinsicWidth && hasIntrinsicHeight)
return true;
if (hasIntrinsicWidth || hasIntrinsicHeight)
return contentRenderer && contentRenderer->isSVGRoot();
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();
// FIXME: The hasIntrinsicWidth and hasIntrinsicHeight flags here are only updated for SVG elements. Ideally, it can be used in
// all the cases so we don't need constrainedSize.width() > 0 and constrainedSize.height() > 0 clauses.
bool hasIntrinsicWidth = constrainedSize.hasIntrinsicWidth || constrainedSize.width() > 0;
bool hasIntrinsicHeight = constrainedSize.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(roundToInt(round(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(round((logicalWidth + borderAndPaddingLogicalWidth) / aspectRatio)) - borderAndPaddingLogicalHeight;
return LayoutUnit(round(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();
// FIXME: The hasIntrinsicHeight and hasIntrinsicWidth flags here are only updated for SVG elements. Ideally, it can be used in
// all the cases so we don't need constrainedSize.height() > 0 and constrainedSize.width() > 0 clauses.
bool hasIntrinsicHeight = constrainedSize.hasIntrinsicHeight || constrainedSize.height() > 0;
bool hasIntrinsicWidth = constrainedSize.hasIntrinsicWidth || constrainedSize.width() > 0;
// See computeReplacedLogicalHeight() for a similar check for heights.
if (intrinsicRatio && (isFlexItem() || isGridItem()) && hasOverridingLogicalWidth() && hasIntrinsicSize(contentRenderer, hasIntrinsicWidth, hasIntrinsicHeight))
return computeReplacedLogicalHeightRespectingMinMaxHeight(roundToInt(round(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] = [&] {
if (auto run = InlineIterator::boxFor(*this)) {
auto line = run->line();
return std::make_pair(line->selectionTopForHitTesting(), line->selectionBottom());
}
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 (style().visibility() != Visibility::Visible && !enclosingLayer()->hasVisibleContent())
return LayoutRect();
// 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();
}
}