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/*
* Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004-2017 Apple Inc. All rights reserved.
* Copyright (C) 2011 Adobe Systems Incorporated. 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 "RenderStyle.h"
#include "CSSComputedStyleDeclaration.h"
#include "CSSCustomPropertyValue.h"
#include "CSSParser.h"
#include "CSSPropertyNames.h"
#include "CSSPropertyParser.h"
#include "ContentData.h"
#include "CursorList.h"
#include "FloatRoundedRect.h"
#include "FontCascade.h"
#include "FontSelector.h"
#include "InlineTextBoxStyle.h"
#include "Pagination.h"
#include "QuotesData.h"
#include "RenderObject.h"
#include "RenderTheme.h"
#include "ScaleTransformOperation.h"
#include "ShadowData.h"
#include "StyleBuilderConverter.h"
#include "StyleImage.h"
#include "StyleInheritedData.h"
#include "StyleResolver.h"
#include "StyleScrollSnapPoints.h"
#include "StyleSelfAlignmentData.h"
#include "StyleTreeResolver.h"
#include "WillChangeData.h"
#include <wtf/MathExtras.h>
#include <wtf/PointerComparison.h>
#include <wtf/StdLibExtras.h>
#include <algorithm>
#if ENABLE(TEXT_AUTOSIZING)
#include <wtf/text/StringHash.h>
#endif
namespace WebCore {
struct SameSizeAsBorderValue {
Color m_color;
float m_width;
int m_restBits;
};
COMPILE_ASSERT(sizeof(BorderValue) == sizeof(SameSizeAsBorderValue), BorderValue_should_not_grow);
struct SameSizeAsRenderStyle {
void* dataRefs[7];
void* ownPtrs[1];
void* dataRefSvgStyle;
struct InheritedFlags {
unsigned m_bitfields[2];
} m_inheritedFlags;
struct NonInheritedFlags {
unsigned m_bitfields[2];
} m_nonInheritedFlags;
#if ASSERT_ENABLED || ENABLE(SECURITY_ASSERTIONS)
bool deletionCheck;
#endif
};
static_assert(sizeof(RenderStyle) == sizeof(SameSizeAsRenderStyle), "RenderStyle should stay small");
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(RenderStyle);
RenderStyle& RenderStyle::defaultStyle()
{
static NeverDestroyed<RenderStyle> style { CreateDefaultStyle };
return style;
}
RenderStyle RenderStyle::create()
{
return clone(defaultStyle());
}
std::unique_ptr<RenderStyle> RenderStyle::createPtr()
{
return clonePtr(defaultStyle());
}
RenderStyle RenderStyle::clone(const RenderStyle& style)
{
return RenderStyle(style, Clone);
}
std::unique_ptr<RenderStyle> RenderStyle::clonePtr(const RenderStyle& style)
{
return makeUnique<RenderStyle>(style, Clone);
}
RenderStyle RenderStyle::createAnonymousStyleWithDisplay(const RenderStyle& parentStyle, DisplayType display)
{
auto newStyle = create();
newStyle.inheritFrom(parentStyle);
newStyle.inheritUnicodeBidiFrom(&parentStyle);
newStyle.setDisplay(display);
return newStyle;
}
RenderStyle RenderStyle::createStyleInheritingFromPseudoStyle(const RenderStyle& pseudoStyle)
{
ASSERT(pseudoStyle.styleType() == PseudoId::Before || pseudoStyle.styleType() == PseudoId::After);
auto style = create();
style.inheritFrom(pseudoStyle);
return style;
}
RenderStyle::RenderStyle(RenderStyle&&) = default;
RenderStyle& RenderStyle::operator=(RenderStyle&&) = default;
RenderStyle::RenderStyle(CreateDefaultStyleTag)
: m_boxData(StyleBoxData::create())
, m_visualData(StyleVisualData::create())
, m_backgroundData(StyleBackgroundData::create())
, m_surroundData(StyleSurroundData::create())
, m_rareNonInheritedData(StyleRareNonInheritedData::create())
, m_rareInheritedData(StyleRareInheritedData::create())
, m_inheritedData(StyleInheritedData::create())
, m_svgStyle(SVGRenderStyle::create())
{
m_inheritedFlags.emptyCells = static_cast<unsigned>(initialEmptyCells());
m_inheritedFlags.captionSide = static_cast<unsigned>(initialCaptionSide());
m_inheritedFlags.listStyleType = static_cast<unsigned>(initialListStyleType());
m_inheritedFlags.listStylePosition = static_cast<unsigned>(initialListStylePosition());
m_inheritedFlags.visibility = static_cast<unsigned>(initialVisibility());
m_inheritedFlags.textAlign = static_cast<unsigned>(initialTextAlign());
m_inheritedFlags.textTransform = static_cast<unsigned>(initialTextTransform());
m_inheritedFlags.textDecorations = initialTextDecoration().toRaw();
m_inheritedFlags.cursor = static_cast<unsigned>(initialCursor());
#if ENABLE(CURSOR_VISIBILITY)
m_inheritedFlags.cursorVisibility = static_cast<unsigned>(initialCursorVisibility());
#endif
m_inheritedFlags.direction = static_cast<unsigned>(initialDirection());
m_inheritedFlags.whiteSpace = static_cast<unsigned>(initialWhiteSpace());
m_inheritedFlags.borderCollapse = static_cast<unsigned>(initialBorderCollapse());
m_inheritedFlags.rtlOrdering = static_cast<unsigned>(initialRTLOrdering());
m_inheritedFlags.boxDirection = static_cast<unsigned>(initialBoxDirection());
m_inheritedFlags.printColorAdjust = static_cast<unsigned>(initialPrintColorAdjust());
m_inheritedFlags.pointerEvents = static_cast<unsigned>(initialPointerEvents());
m_inheritedFlags.insideLink = static_cast<unsigned>(InsideLink::NotInside);
m_inheritedFlags.insideDefaultButton = false;
m_inheritedFlags.writingMode = initialWritingMode();
#if ENABLE(TEXT_AUTOSIZING)
m_inheritedFlags.autosizeStatus = 0;
#endif
m_nonInheritedFlags.effectiveDisplay = static_cast<unsigned>(initialDisplay());
m_nonInheritedFlags.originalDisplay = static_cast<unsigned>(initialDisplay());
m_nonInheritedFlags.overflowX = static_cast<unsigned>(initialOverflowX());
m_nonInheritedFlags.overflowY = static_cast<unsigned>(initialOverflowY());
m_nonInheritedFlags.verticalAlign = static_cast<unsigned>(initialVerticalAlign());
m_nonInheritedFlags.clear = static_cast<unsigned>(initialClear());
m_nonInheritedFlags.position = static_cast<unsigned>(initialPosition());
m_nonInheritedFlags.unicodeBidi = initialUnicodeBidi();
m_nonInheritedFlags.floating = static_cast<unsigned>(initialFloating());
m_nonInheritedFlags.tableLayout = static_cast<unsigned>(initialTableLayout());
m_nonInheritedFlags.hasExplicitlySetDirection = false;
m_nonInheritedFlags.hasExplicitlySetWritingMode = false;
m_nonInheritedFlags.hasExplicitlySetTextAlign = false;
m_nonInheritedFlags.hasViewportUnits = false;
m_nonInheritedFlags.hasExplicitlyInheritedProperties = false;
m_nonInheritedFlags.isUnique = false;
m_nonInheritedFlags.emptyState = false;
m_nonInheritedFlags.firstChildState = false;
m_nonInheritedFlags.lastChildState = false;
m_nonInheritedFlags.affectedByHover = false;
m_nonInheritedFlags.affectedByActive = false;
m_nonInheritedFlags.affectedByDrag = false;
m_nonInheritedFlags.isLink = false;
m_nonInheritedFlags.styleType = static_cast<unsigned>(PseudoId::None);
m_nonInheritedFlags.pseudoBits = static_cast<unsigned>(PseudoId::None);
static_assert((sizeof(InheritedFlags) <= 8), "InheritedFlags does not grow");
static_assert((sizeof(NonInheritedFlags) <= 8), "NonInheritedFlags does not grow");
}
inline RenderStyle::RenderStyle(const RenderStyle& other, CloneTag)
: m_boxData(other.m_boxData)
, m_visualData(other.m_visualData)
, m_backgroundData(other.m_backgroundData)
, m_surroundData(other.m_surroundData)
, m_rareNonInheritedData(other.m_rareNonInheritedData)
, m_nonInheritedFlags(other.m_nonInheritedFlags)
, m_rareInheritedData(other.m_rareInheritedData)
, m_inheritedData(other.m_inheritedData)
, m_inheritedFlags(other.m_inheritedFlags)
, m_svgStyle(other.m_svgStyle)
{
}
inline RenderStyle::RenderStyle(RenderStyle& a, RenderStyle&& b)
: m_boxData(a.m_boxData.replace(WTFMove(b.m_boxData)))
, m_visualData(a.m_visualData.replace(WTFMove(b.m_visualData)))
, m_backgroundData(a.m_backgroundData.replace(WTFMove(b.m_backgroundData)))
, m_surroundData(a.m_surroundData.replace(WTFMove(b.m_surroundData)))
, m_rareNonInheritedData(a.m_rareNonInheritedData.replace(WTFMove(b.m_rareNonInheritedData)))
, m_nonInheritedFlags(std::exchange(a.m_nonInheritedFlags, b.m_nonInheritedFlags))
, m_rareInheritedData(a.m_rareInheritedData.replace(WTFMove(b.m_rareInheritedData)))
, m_inheritedData(a.m_inheritedData.replace(WTFMove(b.m_inheritedData)))
, m_inheritedFlags(std::exchange(a.m_inheritedFlags, b.m_inheritedFlags))
, m_cachedPseudoStyles(std::exchange(a.m_cachedPseudoStyles, WTFMove(b.m_cachedPseudoStyles)))
, m_svgStyle(a.m_svgStyle.replace(WTFMove(b.m_svgStyle)))
{
}
RenderStyle::~RenderStyle()
{
#if ASSERT_ENABLED || ENABLE(SECURITY_ASSERTIONS)
ASSERT_WITH_SECURITY_IMPLICATION(!m_deletionHasBegun);
m_deletionHasBegun = true;
#endif
}
RenderStyle RenderStyle::replace(RenderStyle&& newStyle)
{
return RenderStyle { *this, WTFMove(newStyle) };
}
static StyleSelfAlignmentData resolvedSelfAlignment(const StyleSelfAlignmentData& value, ItemPosition normalValueBehavior)
{
if (value.position() == ItemPosition::Legacy || value.position() == ItemPosition::Normal || value.position() == ItemPosition::Auto)
return { normalValueBehavior, OverflowAlignment::Default };
return value;
}
StyleSelfAlignmentData RenderStyle::resolvedAlignItems(ItemPosition normalValueBehaviour) const
{
return resolvedSelfAlignment(alignItems(), normalValueBehaviour);
}
StyleSelfAlignmentData RenderStyle::resolvedAlignSelf(const RenderStyle* parentStyle, ItemPosition normalValueBehaviour) const
{
// The auto keyword computes to the parent's align-items computed value.
// We will return the behaviour of 'normal' value if needed, which is specific of each layout model.
if (!parentStyle || alignSelf().position() != ItemPosition::Auto)
return resolvedSelfAlignment(alignSelf(), normalValueBehaviour);
return parentStyle->resolvedAlignItems(normalValueBehaviour);
}
StyleSelfAlignmentData RenderStyle::resolvedJustifyItems(ItemPosition normalValueBehaviour) const
{
return resolvedSelfAlignment(justifyItems(), normalValueBehaviour);
}
StyleSelfAlignmentData RenderStyle::resolvedJustifySelf(const RenderStyle* parentStyle, ItemPosition normalValueBehaviour) const
{
// The auto keyword computes to the parent's justify-items computed value.
// We will return the behaviour of 'normal' value if needed, which is specific of each layout model.
if (!parentStyle || justifySelf().position() != ItemPosition::Auto)
return resolvedSelfAlignment(justifySelf(), normalValueBehaviour);
return parentStyle->resolvedJustifyItems(normalValueBehaviour);
}
static inline StyleContentAlignmentData resolvedContentAlignment(const StyleContentAlignmentData& value, const StyleContentAlignmentData& normalValueBehavior)
{
return (value.position() == ContentPosition::Normal && value.distribution() == ContentDistribution::Default) ? normalValueBehavior : value;
}
StyleContentAlignmentData RenderStyle::resolvedAlignContent(const StyleContentAlignmentData& normalValueBehavior) const
{
// We will return the behaviour of 'normal' value if needed, which is specific of each layout model.
return resolvedContentAlignment(alignContent(), normalValueBehavior);
}
StyleContentAlignmentData RenderStyle::resolvedJustifyContent(const StyleContentAlignmentData& normalValueBehavior) const
{
// We will return the behaviour of 'normal' value if needed, which is specific of each layout model.
return resolvedContentAlignment(justifyContent(), normalValueBehavior);
}
static inline ContentPosition resolvedContentAlignmentPosition(const StyleContentAlignmentData& value, const StyleContentAlignmentData& normalValueBehavior)
{
return (value.position() == ContentPosition::Normal && value.distribution() == ContentDistribution::Default) ? normalValueBehavior.position() : value.position();
}
static inline ContentDistribution resolvedContentAlignmentDistribution(const StyleContentAlignmentData& value, const StyleContentAlignmentData& normalValueBehavior)
{
return (value.position() == ContentPosition::Normal && value.distribution() == ContentDistribution::Default) ? normalValueBehavior.distribution() : value.distribution();
}
ContentPosition RenderStyle::resolvedJustifyContentPosition(const StyleContentAlignmentData& normalValueBehavior) const
{
return resolvedContentAlignmentPosition(justifyContent(), normalValueBehavior);
}
ContentDistribution RenderStyle::resolvedJustifyContentDistribution(const StyleContentAlignmentData& normalValueBehavior) const
{
return resolvedContentAlignmentDistribution(justifyContent(), normalValueBehavior);
}
ContentPosition RenderStyle::resolvedAlignContentPosition(const StyleContentAlignmentData& normalValueBehavior) const
{
return resolvedContentAlignmentPosition(alignContent(), normalValueBehavior);
}
ContentDistribution RenderStyle::resolvedAlignContentDistribution(const StyleContentAlignmentData& normalValueBehavior) const
{
return resolvedContentAlignmentDistribution(alignContent(), normalValueBehavior);
}
void RenderStyle::inheritFrom(const RenderStyle& inheritParent)
{
m_rareInheritedData = inheritParent.m_rareInheritedData;
m_inheritedData = inheritParent.m_inheritedData;
m_inheritedFlags = inheritParent.m_inheritedFlags;
if (m_svgStyle != inheritParent.m_svgStyle)
m_svgStyle.access().inheritFrom(inheritParent.m_svgStyle.get());
}
void RenderStyle::copyNonInheritedFrom(const RenderStyle& other)
{
m_boxData = other.m_boxData;
m_visualData = other.m_visualData;
m_backgroundData = other.m_backgroundData;
m_surroundData = other.m_surroundData;
m_rareNonInheritedData = other.m_rareNonInheritedData;
m_nonInheritedFlags.copyNonInheritedFrom(other.m_nonInheritedFlags);
if (m_svgStyle != other.m_svgStyle)
m_svgStyle.access().copyNonInheritedFrom(other.m_svgStyle.get());
ASSERT(zoom() == initialZoom());
}
void RenderStyle::copyContentFrom(const RenderStyle& other)
{
if (!other.m_rareNonInheritedData->content)
return;
m_rareNonInheritedData.access().content = other.m_rareNonInheritedData->content->clone();
}
bool RenderStyle::operator==(const RenderStyle& other) const
{
// compare everything except the pseudoStyle pointer
return m_inheritedFlags == other.m_inheritedFlags
&& m_nonInheritedFlags == other.m_nonInheritedFlags
&& m_boxData == other.m_boxData
&& m_visualData == other.m_visualData
&& m_backgroundData == other.m_backgroundData
&& m_surroundData == other.m_surroundData
&& m_rareNonInheritedData == other.m_rareNonInheritedData
&& m_rareInheritedData == other.m_rareInheritedData
&& m_inheritedData == other.m_inheritedData
&& m_svgStyle == other.m_svgStyle;
}
bool RenderStyle::hasUniquePseudoStyle() const
{
if (!m_cachedPseudoStyles || styleType() != PseudoId::None)
return false;
for (auto& pseudoStyle : *m_cachedPseudoStyles) {
if (pseudoStyle->unique())
return true;
}
return false;
}
RenderStyle* RenderStyle::getCachedPseudoStyle(PseudoId pid) const
{
if (!m_cachedPseudoStyles || !m_cachedPseudoStyles->size())
return nullptr;
if (styleType() != PseudoId::None)
return nullptr;
for (auto& pseudoStyle : *m_cachedPseudoStyles) {
if (pseudoStyle->styleType() == pid)
return pseudoStyle.get();
}
return nullptr;
}
RenderStyle* RenderStyle::addCachedPseudoStyle(std::unique_ptr<RenderStyle> pseudo)
{
if (!pseudo)
return nullptr;
ASSERT(pseudo->styleType() > PseudoId::None);
RenderStyle* result = pseudo.get();
if (!m_cachedPseudoStyles)
m_cachedPseudoStyles = makeUnique<PseudoStyleCache>();
m_cachedPseudoStyles->append(WTFMove(pseudo));
return result;
}
void RenderStyle::removeCachedPseudoStyle(PseudoId pid)
{
if (!m_cachedPseudoStyles)
return;
for (size_t i = 0; i < m_cachedPseudoStyles->size(); ++i) {
RenderStyle* pseudoStyle = m_cachedPseudoStyles->at(i).get();
if (pseudoStyle->styleType() == pid) {
m_cachedPseudoStyles->remove(i);
return;
}
}
}
bool RenderStyle::inheritedEqual(const RenderStyle& other) const
{
return m_inheritedFlags == other.m_inheritedFlags
&& m_inheritedData == other.m_inheritedData
&& (m_svgStyle.ptr() == other.m_svgStyle.ptr() || m_svgStyle->inheritedEqual(other.m_svgStyle))
&& m_rareInheritedData == other.m_rareInheritedData;
}
#if ENABLE(TEXT_AUTOSIZING)
static inline unsigned computeFontHash(const FontCascade& font)
{
IntegerHasher hasher;
hasher.add(ASCIICaseInsensitiveHash::hash(font.fontDescription().firstFamily()));
hasher.add(font.fontDescription().specifiedSize());
return hasher.hash();
}
unsigned RenderStyle::hashForTextAutosizing() const
{
// FIXME: Not a very smart hash. Could be improved upon. See <https://bugs.webkit.org/show_bug.cgi?id=121131>.
unsigned hash = m_rareNonInheritedData->appearance;
hash ^= m_rareNonInheritedData->marginBeforeCollapse;
hash ^= m_rareNonInheritedData->marginAfterCollapse;
hash ^= m_rareNonInheritedData->lineClamp.value();
hash ^= m_rareInheritedData->overflowWrap;
hash ^= m_rareInheritedData->nbspMode;
hash ^= m_rareInheritedData->lineBreak;
hash ^= WTF::FloatHash<float>::hash(m_inheritedData->specifiedLineHeight.value());
hash ^= computeFontHash(m_inheritedData->fontCascade);
hash ^= WTF::FloatHash<float>::hash(m_inheritedData->horizontalBorderSpacing);
hash ^= WTF::FloatHash<float>::hash(m_inheritedData->verticalBorderSpacing);
hash ^= m_inheritedFlags.boxDirection;
hash ^= m_inheritedFlags.rtlOrdering;
hash ^= m_nonInheritedFlags.position;
hash ^= m_nonInheritedFlags.floating;
hash ^= m_rareNonInheritedData->textOverflow;
hash ^= m_rareInheritedData->textSecurity;
return hash;
}
bool RenderStyle::equalForTextAutosizing(const RenderStyle& other) const
{
return m_rareNonInheritedData->appearance == other.m_rareNonInheritedData->appearance
&& m_rareNonInheritedData->marginBeforeCollapse == other.m_rareNonInheritedData->marginBeforeCollapse
&& m_rareNonInheritedData->marginAfterCollapse == other.m_rareNonInheritedData->marginAfterCollapse
&& m_rareNonInheritedData->lineClamp == other.m_rareNonInheritedData->lineClamp
&& m_rareInheritedData->textSizeAdjust == other.m_rareInheritedData->textSizeAdjust
&& m_rareInheritedData->overflowWrap == other.m_rareInheritedData->overflowWrap
&& m_rareInheritedData->nbspMode == other.m_rareInheritedData->nbspMode
&& m_rareInheritedData->lineBreak == other.m_rareInheritedData->lineBreak
&& m_rareInheritedData->textSecurity == other.m_rareInheritedData->textSecurity
&& m_inheritedData->specifiedLineHeight == other.m_inheritedData->specifiedLineHeight
&& m_inheritedData->fontCascade.equalForTextAutoSizing(other.m_inheritedData->fontCascade)
&& m_inheritedData->horizontalBorderSpacing == other.m_inheritedData->horizontalBorderSpacing
&& m_inheritedData->verticalBorderSpacing == other.m_inheritedData->verticalBorderSpacing
&& m_inheritedFlags.boxDirection == other.m_inheritedFlags.boxDirection
&& m_inheritedFlags.rtlOrdering == other.m_inheritedFlags.rtlOrdering
&& m_nonInheritedFlags.position == other.m_nonInheritedFlags.position
&& m_nonInheritedFlags.floating == other.m_nonInheritedFlags.floating
&& m_rareNonInheritedData->textOverflow == other.m_rareNonInheritedData->textOverflow;
}
bool RenderStyle::isIdempotentTextAutosizingCandidate() const
{
// Refer to <rdar://problem/51826266> for more information regarding how this function was generated.
auto fields = OptionSet<AutosizeStatus::Fields>::fromRaw(m_inheritedFlags.autosizeStatus);
if (fields.contains(AutosizeStatus::Fields::AvoidSubtree))
return false;
const float smallMinimumDifferenceThresholdBetweenLineHeightAndSpecifiedFontSizeForBoostingText = 5;
const float largeMinimumDifferenceThresholdBetweenLineHeightAndSpecifiedFontSizeForBoostingText = 25;
if (fields.contains(AutosizeStatus::Fields::FixedHeight)) {
if (fields.contains(AutosizeStatus::Fields::FixedWidth)) {
if (whiteSpace() == WhiteSpace::NoWrap) {
if (width().isFixed())
return false;
if (height().isFixed() && specifiedLineHeight().isFixed()) {
float specifiedSize = specifiedFontSize();
if (height().value() == specifiedSize && specifiedLineHeight().value() == specifiedSize)
return false;
}
return true;
}
if (fields.contains(AutosizeStatus::Fields::Floating)) {
if (specifiedLineHeight().isFixed() && height().isFixed()) {
float specifiedSize = specifiedFontSize();
if (specifiedLineHeight().value() - specifiedSize > smallMinimumDifferenceThresholdBetweenLineHeightAndSpecifiedFontSizeForBoostingText
&& height().value() - specifiedSize > smallMinimumDifferenceThresholdBetweenLineHeightAndSpecifiedFontSizeForBoostingText) {
return true;
}
}
return false;
}
if (fields.contains(AutosizeStatus::Fields::OverflowXHidden))
return false;
return true;
}
if (fields.contains(AutosizeStatus::Fields::OverflowXHidden)) {
if (fields.contains(AutosizeStatus::Fields::Floating))
return false;
return true;
}
return true;
}
if (width().isFixed()) {
if (breakWords())
return true;
return false;
}
if (textSizeAdjust().isPercentage() && textSizeAdjust().percentage() == 100) {
if (fields.contains(AutosizeStatus::Fields::Floating))
return true;
if (fields.contains(AutosizeStatus::Fields::FixedWidth))
return true;
if (specifiedLineHeight().isFixed() && specifiedLineHeight().value() - specifiedFontSize() > largeMinimumDifferenceThresholdBetweenLineHeightAndSpecifiedFontSizeForBoostingText)
return true;
return false;
}
if (hasBackgroundImage() && backgroundRepeatX() == FillRepeat::NoRepeat && backgroundRepeatY() == FillRepeat::NoRepeat)
return false;
return true;
}
AutosizeStatus RenderStyle::autosizeStatus() const
{
return OptionSet<AutosizeStatus::Fields>::fromRaw(m_inheritedFlags.autosizeStatus);
}
void RenderStyle::setAutosizeStatus(AutosizeStatus autosizeStatus)
{
m_inheritedFlags.autosizeStatus = autosizeStatus.fields().toRaw();
}
#endif // ENABLE(TEXT_AUTOSIZING)
static bool positionChangeIsMovementOnly(const LengthBox& a, const LengthBox& b, const Length& width)
{
// If any unit types are different, then we can't guarantee
// that this was just a movement.
if (a.left().type() != b.left().type()
|| a.right().type() != b.right().type()
|| a.top().type() != b.top().type()
|| a.bottom().type() != b.bottom().type())
return false;
// Only one unit can be non-auto in the horizontal direction and
// in the vertical direction. Otherwise the adjustment of values
// is changing the size of the box.
if (!a.left().isIntrinsicOrAuto() && !a.right().isIntrinsicOrAuto())
return false;
if (!a.top().isIntrinsicOrAuto() && !a.bottom().isIntrinsicOrAuto())
return false;
// If our width is auto and left or right is specified then this
// is not just a movement - we need to resize to our container.
if ((!a.left().isIntrinsicOrAuto() || !a.right().isIntrinsicOrAuto()) && width.isIntrinsicOrAuto())
return false;
// One of the units is fixed or percent in both directions and stayed
// that way in the new style. Therefore all we are doing is moving.
return true;
}
inline bool RenderStyle::changeAffectsVisualOverflow(const RenderStyle& other) const
{
if (m_rareNonInheritedData.ptr() != other.m_rareNonInheritedData.ptr()
&& !arePointingToEqualData(m_rareNonInheritedData->boxShadow, other.m_rareNonInheritedData->boxShadow))
return true;
if (m_rareInheritedData.ptr() != other.m_rareInheritedData.ptr()
&& !arePointingToEqualData(m_rareInheritedData->textShadow, other.m_rareInheritedData->textShadow))
return true;
if (m_inheritedFlags.textDecorations != other.m_inheritedFlags.textDecorations
|| m_rareNonInheritedData->textDecorationStyle != other.m_rareNonInheritedData->textDecorationStyle
|| m_rareInheritedData->textDecorationThickness != other.m_rareInheritedData->textDecorationThickness
|| m_rareInheritedData->textUnderlineOffset != other.m_rareInheritedData->textUnderlineOffset
|| m_rareInheritedData->textUnderlinePosition != other.m_rareInheritedData->textUnderlinePosition) {
// Underlines are always drawn outside of their textbox bounds when text-underline-position: under;
// is specified. We can take an early out here.
if (textUnderlinePosition() == TextUnderlinePosition::Under || other.textUnderlinePosition() == TextUnderlinePosition::Under)
return true;
return visualOverflowForDecorations(*this, nullptr) != visualOverflowForDecorations(other, nullptr);
}
if (hasOutlineInVisualOverflow() != other.hasOutlineInVisualOverflow())
return true;
return false;
}
static bool rareNonInheritedDataChangeRequiresLayout(const StyleRareNonInheritedData& first, const StyleRareNonInheritedData& second, OptionSet<StyleDifferenceContextSensitiveProperty>& changedContextSensitiveProperties)
{
ASSERT(&first != &second);
if (first.appearance != second.appearance
|| first.marginBeforeCollapse != second.marginBeforeCollapse
|| first.marginAfterCollapse != second.marginAfterCollapse
|| first.lineClamp != second.lineClamp
|| first.initialLetter != second.initialLetter
|| first.textOverflow != second.textOverflow)
return true;
if (first.shapeMargin != second.shapeMargin)
return true;
if (first.deprecatedFlexibleBox != second.deprecatedFlexibleBox)
return true;
if (first.flexibleBox != second.flexibleBox)
return true;
if (first.order != second.order
|| first.alignContent != second.alignContent
|| first.alignItems != second.alignItems
|| first.alignSelf != second.alignSelf
|| first.justifyContent != second.justifyContent
|| first.justifyItems != second.justifyItems
|| first.justifySelf != second.justifySelf)
return true;
if (!arePointingToEqualData(first.boxReflect, second.boxReflect))
return true;
if (first.multiCol != second.multiCol)
return true;
if (first.transform.ptr() != second.transform.ptr()) {
if (first.transform->hasTransform() != second.transform->hasTransform())
return true;
if (*first.transform != *second.transform) {
changedContextSensitiveProperties.add(StyleDifferenceContextSensitiveProperty::Transform);
// Don't return; keep looking for another change
}
}
if (first.grid != second.grid
|| first.gridItem != second.gridItem)
return true;
if (!arePointingToEqualData(first.willChange, second.willChange)) {
changedContextSensitiveProperties.add(StyleDifferenceContextSensitiveProperty::WillChange);
// Don't return; keep looking for another change
}
if (first.textCombine != second.textCombine)
return true;
if (first.breakBefore != second.breakBefore
|| first.breakAfter != second.breakAfter
|| first.breakInside != second.breakInside)
return true;
if (first.hasOpacity() != second.hasOpacity()) {
// FIXME: We would like to use SimplifiedLayout here, but we can't quite do that yet.
// We need to make sure SimplifiedLayout can operate correctly on RenderInlines (we will need
// to add a selfNeedsSimplifiedLayout bit in order to not get confused and taint every line).
// In addition we need to solve the floating object issue when layers come and go. Right now
// a full layout is necessary to keep floating object lists sane.
return true;
}
#if ENABLE(CSS_COMPOSITING)
if (first.isolation != second.isolation) {
// Ideally this would trigger a cheaper layout that just updates layer z-order trees (webit.org/b/190088).
return true;
}
#endif
if (first.hasFilters() != second.hasFilters())
return true;
#if ENABLE(FILTERS_LEVEL_2)
if (first.hasBackdropFilters() != second.hasBackdropFilters())
return true;
#endif
return false;
}
static bool rareInheritedDataChangeRequiresLayout(const StyleRareInheritedData& first, const StyleRareInheritedData& second)
{
ASSERT(&first != &second);
if (first.indent != second.indent
#if ENABLE(CSS3_TEXT)
|| first.textAlignLast != second.textAlignLast
|| first.textJustify != second.textJustify
|| first.textIndentLine != second.textIndentLine
#endif
|| first.effectiveZoom != second.effectiveZoom
|| first.textZoom != second.textZoom
#if ENABLE(TEXT_AUTOSIZING)
|| first.textSizeAdjust != second.textSizeAdjust
#endif
|| first.wordBreak != second.wordBreak
|| first.overflowWrap != second.overflowWrap
|| first.nbspMode != second.nbspMode
|| first.lineBreak != second.lineBreak
|| first.textSecurity != second.textSecurity
|| first.hyphens != second.hyphens
|| first.hyphenationLimitBefore != second.hyphenationLimitBefore
|| first.hyphenationLimitAfter != second.hyphenationLimitAfter
|| first.hyphenationString != second.hyphenationString
|| first.rubyPosition != second.rubyPosition
|| first.textEmphasisMark != second.textEmphasisMark
|| first.textEmphasisPosition != second.textEmphasisPosition
|| first.textEmphasisCustomMark != second.textEmphasisCustomMark
|| first.textOrientation != second.textOrientation
|| first.tabSize != second.tabSize
|| first.lineBoxContain != second.lineBoxContain
|| first.lineGrid != second.lineGrid
|| first.imageOrientation != second.imageOrientation
#if ENABLE(CSS_IMAGE_RESOLUTION)
|| first.imageResolutionSource != second.imageResolutionSource
|| first.imageResolutionSnap != second.imageResolutionSnap
|| first.imageResolution != second.imageResolution
#endif
|| first.lineSnap != second.lineSnap
|| first.lineAlign != second.lineAlign
|| first.hangingPunctuation != second.hangingPunctuation
#if ENABLE(OVERFLOW_SCROLLING_TOUCH)
|| first.useTouchOverflowScrolling != second.useTouchOverflowScrolling
#endif
|| first.listStyleImage != second.listStyleImage) // FIXME: needs arePointingToEqualData()?
return true;
if (first.textStrokeWidth != second.textStrokeWidth)
return true;
// These properties affect the cached stroke bounding box rects.
if (first.capStyle != second.capStyle
|| first.joinStyle != second.joinStyle
|| first.strokeWidth != second.strokeWidth
|| first.miterLimit != second.miterLimit)
return true;
if (!arePointingToEqualData(first.quotes, second.quotes))
return true;
return false;
}
bool RenderStyle::changeRequiresLayout(const RenderStyle& other, OptionSet<StyleDifferenceContextSensitiveProperty>& changedContextSensitiveProperties) const
{
if (m_boxData.ptr() != other.m_boxData.ptr()) {
if (m_boxData->width() != other.m_boxData->width()
|| m_boxData->minWidth() != other.m_boxData->minWidth()
|| m_boxData->maxWidth() != other.m_boxData->maxWidth()
|| m_boxData->height() != other.m_boxData->height()
|| m_boxData->minHeight() != other.m_boxData->minHeight()
|| m_boxData->maxHeight() != other.m_boxData->maxHeight())
return true;
if (m_boxData->verticalAlign() != other.m_boxData->verticalAlign())
return true;
if (m_boxData->boxSizing() != other.m_boxData->boxSizing())
return true;
}
if (m_surroundData->margin != other.m_surroundData->margin)
return true;
if (m_surroundData->padding != other.m_surroundData->padding)
return true;
// FIXME: We should add an optimized form of layout that just recomputes visual overflow.
if (changeAffectsVisualOverflow(other))
return true;
if (m_rareNonInheritedData.ptr() != other.m_rareNonInheritedData.ptr()
&& rareNonInheritedDataChangeRequiresLayout(*m_rareNonInheritedData, *other.m_rareNonInheritedData, changedContextSensitiveProperties))
return true;
if (m_rareInheritedData.ptr() != other.m_rareInheritedData.ptr()
&& rareInheritedDataChangeRequiresLayout(*m_rareInheritedData, *other.m_rareInheritedData))
return true;
if (m_inheritedData.ptr() != other.m_inheritedData.ptr()) {
if (m_inheritedData->lineHeight != other.m_inheritedData->lineHeight
#if ENABLE(TEXT_AUTOSIZING)
|| m_inheritedData->specifiedLineHeight != other.m_inheritedData->specifiedLineHeight
#endif
|| m_inheritedData->fontCascade != other.m_inheritedData->fontCascade
|| m_inheritedData->horizontalBorderSpacing != other.m_inheritedData->horizontalBorderSpacing
|| m_inheritedData->verticalBorderSpacing != other.m_inheritedData->verticalBorderSpacing)
return true;
}
if (m_inheritedFlags.boxDirection != other.m_inheritedFlags.boxDirection
|| m_inheritedFlags.rtlOrdering != other.m_inheritedFlags.rtlOrdering
|| m_nonInheritedFlags.position != other.m_nonInheritedFlags.position
|| m_nonInheritedFlags.floating != other.m_nonInheritedFlags.floating
|| m_nonInheritedFlags.originalDisplay != other.m_nonInheritedFlags.originalDisplay
|| m_nonInheritedFlags.verticalAlign != other.m_nonInheritedFlags.verticalAlign)
return true;
if (static_cast<DisplayType>(m_nonInheritedFlags.effectiveDisplay) >= DisplayType::Table) {
if (m_inheritedFlags.borderCollapse != other.m_inheritedFlags.borderCollapse
|| m_inheritedFlags.emptyCells != other.m_inheritedFlags.emptyCells
|| m_inheritedFlags.captionSide != other.m_inheritedFlags.captionSide
|| m_nonInheritedFlags.tableLayout != other.m_nonInheritedFlags.tableLayout)
return true;
// In the collapsing border model, 'hidden' suppresses other borders, while 'none'
// does not, so these style differences can be width differences.
if (m_inheritedFlags.borderCollapse
&& ((borderTopStyle() == BorderStyle::Hidden && other.borderTopStyle() == BorderStyle::None)
|| (borderTopStyle() == BorderStyle::None && other.borderTopStyle() == BorderStyle::Hidden)
|| (borderBottomStyle() == BorderStyle::Hidden && other.borderBottomStyle() == BorderStyle::None)
|| (borderBottomStyle() == BorderStyle::None && other.borderBottomStyle() == BorderStyle::Hidden)
|| (borderLeftStyle() == BorderStyle::Hidden && other.borderLeftStyle() == BorderStyle::None)
|| (borderLeftStyle() == BorderStyle::None && other.borderLeftStyle() == BorderStyle::Hidden)
|| (borderRightStyle() == BorderStyle::Hidden && other.borderRightStyle() == BorderStyle::None)
|| (borderRightStyle() == BorderStyle::None && other.borderRightStyle() == BorderStyle::Hidden)))
return true;
}
if (static_cast<DisplayType>(m_nonInheritedFlags.effectiveDisplay) == DisplayType::ListItem) {
if (m_inheritedFlags.listStyleType != other.m_inheritedFlags.listStyleType
|| m_inheritedFlags.listStylePosition != other.m_inheritedFlags.listStylePosition)
return true;
}
if (m_inheritedFlags.textAlign != other.m_inheritedFlags.textAlign
|| m_inheritedFlags.textTransform != other.m_inheritedFlags.textTransform
|| m_inheritedFlags.direction != other.m_inheritedFlags.direction
|| m_inheritedFlags.whiteSpace != other.m_inheritedFlags.whiteSpace
|| m_nonInheritedFlags.clear != other.m_nonInheritedFlags.clear
|| m_nonInheritedFlags.unicodeBidi != other.m_nonInheritedFlags.unicodeBidi)
return true;
// Check block flow direction.
if (m_inheritedFlags.writingMode != other.m_inheritedFlags.writingMode)
return true;
// Overflow returns a layout hint.
if (m_nonInheritedFlags.overflowX != other.m_nonInheritedFlags.overflowX
|| m_nonInheritedFlags.overflowY != other.m_nonInheritedFlags.overflowY)
return true;
// If our border widths change, then we need to layout. Other changes to borders
// only necessitate a repaint.
if (borderLeftWidth() != other.borderLeftWidth()
|| borderTopWidth() != other.borderTopWidth()
|| borderBottomWidth() != other.borderBottomWidth()
|| borderRightWidth() != other.borderRightWidth())
return true;
// If the counter directives change, trigger a relayout to re-calculate counter values and rebuild the counter node tree.
if (!arePointingToEqualData(m_rareNonInheritedData->counterDirectives, other.m_rareNonInheritedData->counterDirectives))
return true;
if ((visibility() == Visibility::Collapse) != (other.visibility() == Visibility::Collapse))
return true;
if (position() != PositionType::Static) {
if (m_surroundData->offset != other.m_surroundData->offset) {
// FIXME: We would like to use SimplifiedLayout for relative positioning, but we can't quite do that yet.
// We need to make sure SimplifiedLayout can operate correctly on RenderInlines (we will need
// to add a selfNeedsSimplifiedLayout bit in order to not get confused and taint every line).
if (position() != PositionType::Absolute)
return true;
// Optimize for the case where a positioned layer is moving but not changing size.
if (!positionChangeIsMovementOnly(m_surroundData->offset, other.m_surroundData->offset, m_boxData->width()))
return true;
}
}
bool hasFirstLineStyle = hasPseudoStyle(PseudoId::FirstLine);
if (hasFirstLineStyle != other.hasPseudoStyle(PseudoId::FirstLine))
return true;
if (hasFirstLineStyle) {
auto* firstLineStyle = getCachedPseudoStyle(PseudoId::FirstLine);
if (!firstLineStyle)
return true;
auto* otherFirstLineStyle = other.getCachedPseudoStyle(PseudoId::FirstLine);
if (!otherFirstLineStyle)
return true;
// FIXME: Not all first line style changes actually need layout.
if (*firstLineStyle != *otherFirstLineStyle)
return true;
}
return false;
}
bool RenderStyle::changeRequiresPositionedLayoutOnly(const RenderStyle& other, OptionSet<StyleDifferenceContextSensitiveProperty>&) const
{
if (position() == PositionType::Static)
return false;
if (m_surroundData->offset != other.m_surroundData->offset) {
// Optimize for the case where a positioned layer is moving but not changing size.
if (position() == PositionType::Absolute && positionChangeIsMovementOnly(m_surroundData->offset, other.m_surroundData->offset, m_boxData->width()))
return true;
}
return false;
}
static bool rareNonInheritedDataChangeRequiresLayerRepaint(const StyleRareNonInheritedData& first, const StyleRareNonInheritedData& second, OptionSet<StyleDifferenceContextSensitiveProperty>& changedContextSensitiveProperties)
{
#if ENABLE(CSS_COMPOSITING)
if (first.effectiveBlendMode != second.effectiveBlendMode)
return true;
#endif
if (first.opacity != second.opacity) {
changedContextSensitiveProperties.add(StyleDifferenceContextSensitiveProperty::Opacity);
// Don't return true; keep looking for another change.
}
if (first.filter != second.filter) {
changedContextSensitiveProperties.add(StyleDifferenceContextSensitiveProperty::Filter);
// Don't return true; keep looking for another change.
}
#if ENABLE(FILTERS_LEVEL_2)
if (first.backdropFilter != second.backdropFilter) {
changedContextSensitiveProperties.add(StyleDifferenceContextSensitiveProperty::Filter);
// Don't return true; keep looking for another change.
}
#endif
if (first.mask != second.mask || first.maskBoxImage != second.maskBoxImage)
return true;
return false;
}
bool RenderStyle::changeRequiresLayerRepaint(const RenderStyle& other, OptionSet<StyleDifferenceContextSensitiveProperty>& changedContextSensitiveProperties) const
{
// Style::Resolver has ensured that zIndex is non-auto only if it's applicable.
if (m_boxData->usedZIndex() != other.m_boxData->usedZIndex() || m_boxData->hasAutoUsedZIndex() != other.m_boxData->hasAutoUsedZIndex())
return true;
if (position() != PositionType::Static) {
if (m_visualData->clip != other.m_visualData->clip || m_visualData->hasClip != other.m_visualData->hasClip) {
changedContextSensitiveProperties.add(StyleDifferenceContextSensitiveProperty::ClipRect);
return true;
}
}
if (m_rareNonInheritedData.ptr() != other.m_rareNonInheritedData.ptr()
&& rareNonInheritedDataChangeRequiresLayerRepaint(*m_rareNonInheritedData, *other.m_rareNonInheritedData, changedContextSensitiveProperties))
return true;
return false;
}
static bool requiresPainting(const RenderStyle& style)
{
if (style.visibility() == Visibility::Hidden)
return false;
if (!style.opacity())
return false;
return true;
}
static bool rareNonInheritedDataChangeRequiresRepaint(const StyleRareNonInheritedData& first, const StyleRareNonInheritedData& second, OptionSet<StyleDifferenceContextSensitiveProperty>& changedContextSensitiveProperties)
{
if (first.userDrag != second.userDrag
|| first.borderFit != second.borderFit
|| first.objectFit != second.objectFit
|| first.objectPosition != second.objectPosition)
return true;
if (first.isNotFinal != second.isNotFinal)
return true;
if (first.shapeOutside != second.shapeOutside)
return true;
// FIXME: this should probably be moved to changeRequiresLayerRepaint().
if (first.clipPath != second.clipPath) {
changedContextSensitiveProperties.add(StyleDifferenceContextSensitiveProperty::ClipPath);
// Don't return true; keep looking for another change.
}
return false;
}
static bool rareInheritedDataChangeRequiresRepaint(const StyleRareInheritedData& first, const StyleRareInheritedData& second)
{
return first.userModify != second.userModify
|| first.userSelect != second.userSelect
|| first.appleColorFilter != second.appleColorFilter
|| first.imageRendering != second.imageRendering
#if ENABLE(DARK_MODE_CSS)
|| first.colorScheme != second.colorScheme
#endif
;
}
#if ENABLE(CSS_PAINTING_API)
void RenderStyle::addCustomPaintWatchProperty(const String& name)
{
auto& data = m_rareNonInheritedData.access();
if (!data.customPaintWatchedProperties)
data.customPaintWatchedProperties = makeUnique<HashSet<String>>();
data.customPaintWatchedProperties->add(name);
}
inline static bool changedCustomPaintWatchedProperty(const RenderStyle& a, const StyleRareNonInheritedData& aData, const RenderStyle& b, const StyleRareNonInheritedData& bData)
{
auto* propertiesA = aData.customPaintWatchedProperties.get();
auto* propertiesB = bData.customPaintWatchedProperties.get();
if (UNLIKELY(propertiesA || propertiesB)) {
// FIXME: We should not need to use ComputedStyleExtractor here.
ComputedStyleExtractor extractor((Element*) nullptr);
for (auto* watchPropertiesMap : { propertiesA, propertiesB }) {
if (!watchPropertiesMap)
continue;
for (auto& name : *watchPropertiesMap) {
RefPtr<CSSValue> valueA;
RefPtr<CSSValue> valueB;
if (isCustomPropertyName(name)) {
if (a.getCustomProperty(name))
valueA = CSSCustomPropertyValue::create(*a.getCustomProperty(name));
if (b.getCustomProperty(name))
valueB = CSSCustomPropertyValue::create(*b.getCustomProperty(name));
} else {
CSSPropertyID propertyID = cssPropertyID(name);
if (!propertyID)
continue;
valueA = extractor.valueForPropertyInStyle(a, propertyID);
valueB = extractor.valueForPropertyInStyle(b, propertyID);
}
if ((valueA && !valueB) || (!valueA && valueB))
return true;
if (!valueA)
continue;
if (!(*valueA == *valueB))
return true;
}
}
}
return false;
}
#endif
bool RenderStyle::changeRequiresRepaint(const RenderStyle& other, OptionSet<StyleDifferenceContextSensitiveProperty>& changedContextSensitiveProperties) const
{
if (!requiresPainting(*this) && !requiresPainting(other))
return false;
if (m_inheritedFlags.visibility != other.m_inheritedFlags.visibility
|| m_inheritedFlags.printColorAdjust != other.m_inheritedFlags.printColorAdjust
|| m_inheritedFlags.insideLink != other.m_inheritedFlags.insideLink
|| m_inheritedFlags.insideDefaultButton != other.m_inheritedFlags.insideDefaultButton
|| m_surroundData->border != other.m_surroundData->border
|| !m_backgroundData->isEquivalentForPainting(*other.m_backgroundData))
return true;
if (m_rareNonInheritedData.ptr() != other.m_rareNonInheritedData.ptr()
&& rareNonInheritedDataChangeRequiresRepaint(*m_rareNonInheritedData, *other.m_rareNonInheritedData, changedContextSensitiveProperties))
return true;
if (m_rareInheritedData.ptr() != other.m_rareInheritedData.ptr()
&& rareInheritedDataChangeRequiresRepaint(*m_rareInheritedData, *other.m_rareInheritedData))
return true;
#if ENABLE(CSS_PAINTING_API)
if (changedCustomPaintWatchedProperty(*this, *m_rareNonInheritedData, other, *other.m_rareNonInheritedData))
return true;
#endif
return false;
}
bool RenderStyle::changeRequiresRepaintIfTextOrBorderOrOutline(const RenderStyle& other, OptionSet<StyleDifferenceContextSensitiveProperty>&) const
{
if (m_inheritedData->color != other.m_inheritedData->color
|| m_inheritedFlags.textDecorations != other.m_inheritedFlags.textDecorations
|| m_visualData->textDecoration != other.m_visualData->textDecoration
|| m_rareNonInheritedData->textDecorationStyle != other.m_rareNonInheritedData->textDecorationStyle
|| m_rareNonInheritedData->textDecorationColor != other.m_rareNonInheritedData->textDecorationColor
|| m_rareInheritedData->textDecorationSkip != other.m_rareInheritedData->textDecorationSkip
|| m_rareInheritedData->textFillColor != other.m_rareInheritedData->textFillColor
|| m_rareInheritedData->textStrokeColor != other.m_rareInheritedData->textStrokeColor
|| m_rareInheritedData->textEmphasisColor != other.m_rareInheritedData->textEmphasisColor
|| m_rareInheritedData->textEmphasisFill != other.m_rareInheritedData->textEmphasisFill
|| m_rareInheritedData->strokeColor != other.m_rareInheritedData->strokeColor
|| m_rareInheritedData->caretColor != other.m_rareInheritedData->caretColor)
return true;
return false;
}
bool RenderStyle::changeRequiresRecompositeLayer(const RenderStyle& other, OptionSet<StyleDifferenceContextSensitiveProperty>&) const
{
if (m_rareNonInheritedData.ptr() != other.m_rareNonInheritedData.ptr()) {
if (m_rareNonInheritedData->transformStyle3D != other.m_rareNonInheritedData->transformStyle3D
|| m_rareNonInheritedData->backfaceVisibility != other.m_rareNonInheritedData->backfaceVisibility
|| m_rareNonInheritedData->perspective != other.m_rareNonInheritedData->perspective
|| m_rareNonInheritedData->perspectiveOriginX != other.m_rareNonInheritedData->perspectiveOriginX
|| m_rareNonInheritedData->perspectiveOriginY != other.m_rareNonInheritedData->perspectiveOriginY)
return true;
}
return false;
}
StyleDifference RenderStyle::diff(const RenderStyle& other, OptionSet<StyleDifferenceContextSensitiveProperty>& changedContextSensitiveProperties) const
{
changedContextSensitiveProperties = OptionSet<StyleDifferenceContextSensitiveProperty>();
StyleDifference svgChange = StyleDifference::Equal;
if (m_svgStyle != other.m_svgStyle) {
svgChange = m_svgStyle->diff(other.m_svgStyle.get());
if (svgChange == StyleDifference::Layout)
return svgChange;
}
if (changeRequiresLayout(other, changedContextSensitiveProperties))
return StyleDifference::Layout;
// SVGRenderStyle::diff() might have returned StyleDifference::Repaint, eg. if fill changes.
// If eg. the font-size changed at the same time, we're not allowed to return StyleDifference::Repaint,
// but have to return StyleDifference::Layout, that's why this if branch comes after all branches
// that are relevant for SVG and might return StyleDifference::Layout.
if (svgChange != StyleDifference::Equal)
return svgChange;
if (changeRequiresPositionedLayoutOnly(other, changedContextSensitiveProperties))
return StyleDifference::LayoutPositionedMovementOnly;
if (changeRequiresLayerRepaint(other, changedContextSensitiveProperties))
return StyleDifference::RepaintLayer;
if (changeRequiresRepaint(other, changedContextSensitiveProperties))
return StyleDifference::Repaint;
if (changeRequiresRecompositeLayer(other, changedContextSensitiveProperties))
return StyleDifference::RecompositeLayer;
if (changeRequiresRepaintIfTextOrBorderOrOutline(other, changedContextSensitiveProperties))
return StyleDifference::RepaintIfTextOrBorderOrOutline;
// Cursors are not checked, since they will be set appropriately in response to mouse events,
// so they don't need to cause any repaint or layout.
// Animations don't need to be checked either. We always set the new style on the RenderObject, so we will get a chance to fire off
// the resulting transition properly.
return StyleDifference::Equal;
}
bool RenderStyle::diffRequiresLayerRepaint(const RenderStyle& style, bool isComposited) const
{
OptionSet<StyleDifferenceContextSensitiveProperty> changedContextSensitiveProperties;
if (changeRequiresRepaint(style, changedContextSensitiveProperties))
return true;
if (isComposited && changeRequiresLayerRepaint(style, changedContextSensitiveProperties))
return changedContextSensitiveProperties.contains(StyleDifferenceContextSensitiveProperty::ClipRect);
return false;
}
void RenderStyle::setClip(Length&& top, Length&& right, Length&& bottom, Length&& left)
{
auto& data = m_visualData.access();
data.clip.top() = WTFMove(top);
data.clip.right() = WTFMove(right);
data.clip.bottom() = WTFMove(bottom);
data.clip.left() = WTFMove(left);
}
void RenderStyle::addCursor(RefPtr<StyleImage>&& image, const IntPoint& hotSpot)
{
auto& cursorData = m_rareInheritedData.access().cursorData;
if (!cursorData)
cursorData = CursorList::create();
cursorData->append(CursorData(WTFMove(image), hotSpot));
}
void RenderStyle::setCursorList(RefPtr<CursorList>&& list)
{
m_rareInheritedData.access().cursorData = WTFMove(list);
}
void RenderStyle::setQuotes(RefPtr<QuotesData>&& q)
{
if (m_rareInheritedData->quotes == q || (m_rareInheritedData->quotes && q && *m_rareInheritedData->quotes == *q))
return;
m_rareInheritedData.access().quotes = WTFMove(q);
}
void RenderStyle::setWillChange(RefPtr<WillChangeData>&& willChangeData)
{
if (arePointingToEqualData(m_rareNonInheritedData->willChange.get(), willChangeData.get()))
return;
m_rareNonInheritedData.access().willChange = WTFMove(willChangeData);
}
void RenderStyle::clearCursorList()
{
if (m_rareInheritedData->cursorData)
m_rareInheritedData.access().cursorData = nullptr;
}
void RenderStyle::clearContent()
{
if (m_rareNonInheritedData->content)
m_rareNonInheritedData.access().content = nullptr;
}
static inline ContentData& lastContent(ContentData& firstContent)
{
auto* lastContent = &firstContent;
for (auto* content = &firstContent; content; content = content->next())
lastContent = content;
return *lastContent;
}
void RenderStyle::setContent(std::unique_ptr<ContentData> contentData, bool add)
{
auto& data = m_rareNonInheritedData.access();
if (add && data.content)
lastContent(*data.content).setNext(WTFMove(contentData));
else {
data.content = WTFMove(contentData);
auto& altText = data.altText;
if (!altText.isNull())
data.content->setAltText(altText);
}
}
void RenderStyle::setContent(RefPtr<StyleImage>&& image, bool add)
{
if (!image)
return;
setContent(makeUnique<ImageContentData>(image.releaseNonNull()), add);
}
void RenderStyle::setContent(const String& string, bool add)
{
auto& data = m_rareNonInheritedData.access();
if (add && data.content) {
auto& last = lastContent(*data.content);
if (!is<TextContentData>(last))
last.setNext(makeUnique<TextContentData>(string));
else {
auto& textContent = downcast<TextContentData>(last);
textContent.setText(textContent.text() + string);
}
} else {
data.content = makeUnique<TextContentData>(string);
auto& altText = data.altText;
if (!altText.isNull())
data.content->setAltText(altText);
}
}
void RenderStyle::setContent(std::unique_ptr<CounterContent> counter, bool add)
{
if (!counter)
return;
setContent(makeUnique<CounterContentData>(WTFMove(counter)), add);
}
void RenderStyle::setContent(QuoteType quote, bool add)
{
setContent(makeUnique<QuoteContentData>(quote), add);
}
void RenderStyle::setContentAltText(const String& string)
{
auto& data = m_rareNonInheritedData.access();
data.altText = string;
if (data.content)
data.content->setAltText(string);
}
const String& RenderStyle::contentAltText() const
{
return m_rareNonInheritedData->altText;
}
void RenderStyle::setHasAttrContent()
{
setUnique();
SET_VAR(m_rareNonInheritedData, hasAttrContent, true);
}
static inline bool requireTransformOrigin(const Vector<RefPtr<TransformOperation>>& transformOperations, RenderStyle::ApplyTransformOrigin applyOrigin)
{
// The transform-origin property brackets the transform with translate operations.
// When the only transform is a translation, the transform-origin is irrelevant.
if (applyOrigin != RenderStyle::IncludeTransformOrigin)
return false;
for (auto& operation : transformOperations) {
// FIXME: Use affectedByTransformOrigin().
auto type = operation->type();
if (type != TransformOperation::TRANSLATE
&& type != TransformOperation::TRANSLATE_3D
&& type != TransformOperation::TRANSLATE_X
&& type != TransformOperation::TRANSLATE_Y
&& type != TransformOperation::TRANSLATE_Z)
return true;
}
return false;
}
void RenderStyle::applyTransform(TransformationMatrix& transform, const FloatRect& boundingBox, ApplyTransformOrigin applyOrigin) const
{
auto& operations = m_rareNonInheritedData->transform->operations.operations();
bool applyTransformOrigin = requireTransformOrigin(operations, applyOrigin);
FloatPoint3D originTranslate;
if (applyTransformOrigin) {
originTranslate.setX(boundingBox.x() + floatValueForLength(transformOriginX(), boundingBox.width()));
originTranslate.setY(boundingBox.y() + floatValueForLength(transformOriginY(), boundingBox.height()));
originTranslate.setZ(transformOriginZ());
transform.translate3d(originTranslate.x(), originTranslate.y(), originTranslate.z());
}
for (auto& operation : operations)
operation->apply(transform, boundingBox.size());
if (applyTransformOrigin)
transform.translate3d(-originTranslate.x(), -originTranslate.y(), -originTranslate.z());
}
void RenderStyle::setPageScaleTransform(float scale)
{
if (scale == 1)
return;
TransformOperations transform;
transform.operations().append(ScaleTransformOperation::create(scale, scale, ScaleTransformOperation::SCALE));
setTransform(transform);
setTransformOriginX(Length(0, Fixed));
setTransformOriginY(Length(0, Fixed));
}
void RenderStyle::setTextShadow(std::unique_ptr<ShadowData> shadowData, bool add)
{
ASSERT(!shadowData || (!shadowData->spread() && shadowData->style() == ShadowStyle::Normal));
auto& rareData = m_rareInheritedData.access();
if (!add) {
rareData.textShadow = WTFMove(shadowData);
return;
}
shadowData->setNext(WTFMove(rareData.textShadow));
rareData.textShadow = WTFMove(shadowData);
}
void RenderStyle::setBoxShadow(std::unique_ptr<ShadowData> shadowData, bool add)
{
auto& rareData = m_rareNonInheritedData.access();
if (!add) {
rareData.boxShadow = WTFMove(shadowData);
return;
}
shadowData->setNext(WTFMove(rareData.boxShadow));
rareData.boxShadow = WTFMove(shadowData);
}
static RoundedRect::Radii calcRadiiFor(const BorderData& border, const LayoutSize& size)
{
return {
sizeForLengthSize(border.topLeftRadius(), size),
sizeForLengthSize(border.topRightRadius(), size),
sizeForLengthSize(border.bottomLeftRadius(), size),
sizeForLengthSize(border.bottomRightRadius(), size)
};
}
StyleImage* RenderStyle::listStyleImage() const
{
return m_rareInheritedData->listStyleImage.get();
}
void RenderStyle::setListStyleImage(RefPtr<StyleImage>&& v)
{
if (m_rareInheritedData->listStyleImage != v)
m_rareInheritedData.access().listStyleImage = WTFMove(v);
}
const Color& RenderStyle::color() const
{
return m_inheritedData->color;
}
const Color& RenderStyle::visitedLinkColor() const
{
return m_inheritedData->visitedLinkColor;
}
void RenderStyle::setColor(const Color& v)
{
SET_VAR(m_inheritedData, color, v);
}
void RenderStyle::setVisitedLinkColor(const Color& v)
{
SET_VAR(m_inheritedData, visitedLinkColor, v);
}
float RenderStyle::horizontalBorderSpacing() const
{
return m_inheritedData->horizontalBorderSpacing;
}
float RenderStyle::verticalBorderSpacing() const
{
return m_inheritedData->verticalBorderSpacing;
}
void RenderStyle::setHorizontalBorderSpacing(float v)
{
SET_VAR(m_inheritedData, horizontalBorderSpacing, v);
}
void RenderStyle::setVerticalBorderSpacing(float v)
{
SET_VAR(m_inheritedData, verticalBorderSpacing, v);
}
RoundedRect RenderStyle::getRoundedBorderFor(const LayoutRect& borderRect, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
{
RoundedRect roundedRect(borderRect);
if (hasBorderRadius()) {
RoundedRect::Radii radii = calcRadiiFor(m_surroundData->border, borderRect.size());
radii.scale(calcBorderRadiiConstraintScaleFor(borderRect, radii));
roundedRect.includeLogicalEdges(radii, isHorizontalWritingMode(), includeLogicalLeftEdge, includeLogicalRightEdge);
}
return roundedRect;
}
RoundedRect RenderStyle::getRoundedInnerBorderFor(const LayoutRect& borderRect, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
{
bool horizontal = isHorizontalWritingMode();
LayoutUnit leftWidth { (!horizontal || includeLogicalLeftEdge) ? borderLeftWidth() : 0 };
LayoutUnit rightWidth { (!horizontal || includeLogicalRightEdge) ? borderRightWidth() : 0 };
LayoutUnit topWidth { (horizontal || includeLogicalLeftEdge) ? borderTopWidth() : 0 };
LayoutUnit bottomWidth { (horizontal || includeLogicalRightEdge) ? borderBottomWidth() : 0 };
return getRoundedInnerBorderFor(borderRect, topWidth, bottomWidth, leftWidth, rightWidth, includeLogicalLeftEdge, includeLogicalRightEdge);
}
RoundedRect RenderStyle::getRoundedInnerBorderFor(const LayoutRect& borderRect, LayoutUnit topWidth, LayoutUnit bottomWidth,
LayoutUnit leftWidth, LayoutUnit rightWidth, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
{
RoundedRect roundedRect { { borderRect.x() + leftWidth, borderRect.y() + topWidth,
borderRect.width() - leftWidth - rightWidth, borderRect.height() - topWidth - bottomWidth } };
if (hasBorderRadius()) {
auto radii = getRoundedBorderFor(borderRect).radii();
radii.shrink(topWidth, bottomWidth, leftWidth, rightWidth);
roundedRect.includeLogicalEdges(radii, isHorizontalWritingMode(), includeLogicalLeftEdge, includeLogicalRightEdge);
}
return roundedRect;
}
static bool allLayersAreFixed(const FillLayer& layers)
{
for (auto* layer = &layers; layer; layer = layer->next()) {
if (!(layer->image() && layer->attachment() == FillAttachment::FixedBackground))
return false;
}
return true;
}
bool RenderStyle::hasEntirelyFixedBackground() const
{
return allLayersAreFixed(backgroundLayers());
}
const CounterDirectiveMap* RenderStyle::counterDirectives() const
{
return m_rareNonInheritedData->counterDirectives.get();
}
CounterDirectiveMap& RenderStyle::accessCounterDirectives()
{
auto& map = m_rareNonInheritedData.access().counterDirectives;
if (!map)
map = makeUnique<CounterDirectiveMap>();
return *map;
}
const AtomString& RenderStyle::hyphenString() const
{
ASSERT(hyphens() != Hyphens::None);
auto& hyphenationString = m_rareInheritedData->hyphenationString;
if (!hyphenationString.isNull())
return hyphenationString;
// FIXME: This should depend on locale.
static NeverDestroyed<AtomString> hyphenMinusString(&hyphenMinus, 1);
static NeverDestroyed<AtomString> hyphenString(&hyphen, 1);
return fontCascade().primaryFont().glyphForCharacter(hyphen) ? hyphenString : hyphenMinusString;
}
const AtomString& RenderStyle::textEmphasisMarkString() const
{
switch (textEmphasisMark()) {
case TextEmphasisMark::None:
return nullAtom();
case TextEmphasisMark::Custom:
return textEmphasisCustomMark();
case TextEmphasisMark::Dot: {
static NeverDestroyed<AtomString> filledDotString(&bullet, 1);
static NeverDestroyed<AtomString> openDotString(&whiteBullet, 1);
return textEmphasisFill() == TextEmphasisFill::Filled ? filledDotString : openDotString;
}
case TextEmphasisMark::Circle: {
static NeverDestroyed<AtomString> filledCircleString(&blackCircle, 1);
static NeverDestroyed<AtomString> openCircleString(&whiteCircle, 1);
return textEmphasisFill() == TextEmphasisFill::Filled ? filledCircleString : openCircleString;
}
case TextEmphasisMark::DoubleCircle: {
static NeverDestroyed<AtomString> filledDoubleCircleString(&fisheye, 1);
static NeverDestroyed<AtomString> openDoubleCircleString(&bullseye, 1);
return textEmphasisFill() == TextEmphasisFill::Filled ? filledDoubleCircleString : openDoubleCircleString;
}
case TextEmphasisMark::Triangle: {
static NeverDestroyed<AtomString> filledTriangleString(&blackUpPointingTriangle, 1);
static NeverDestroyed<AtomString> openTriangleString(&whiteUpPointingTriangle, 1);
return textEmphasisFill() == TextEmphasisFill::Filled ? filledTriangleString : openTriangleString;
}
case TextEmphasisMark::Sesame: {
static NeverDestroyed<AtomString> filledSesameString(&sesameDot, 1);
static NeverDestroyed<AtomString> openSesameString(&whiteSesameDot, 1);
return textEmphasisFill() == TextEmphasisFill::Filled ? filledSesameString : openSesameString;
}
case TextEmphasisMark::Auto:
ASSERT_NOT_REACHED();
return nullAtom();
}
ASSERT_NOT_REACHED();
return nullAtom();
}
void RenderStyle::adjustAnimations()
{
auto* animationList = m_rareNonInheritedData->animations.get();
if (!animationList)
return;
// Get rid of empty animations and anything beyond them
for (size_t i = 0, size = animationList->size(); i < size; ++i) {
if (animationList->animation(i).isEmpty()) {
animationList->resize(i);
break;
}
}
if (animationList->isEmpty()) {
clearAnimations();
return;
}
// Repeat patterns into layers that don't have some properties set.
animationList->fillUnsetProperties();
}
void RenderStyle::adjustTransitions()
{
auto* transitionList = m_rareNonInheritedData->transitions.get();
if (!transitionList)
return;
// Get rid of empty transitions and anything beyond them
for (size_t i = 0, size = transitionList->size(); i < size; ++i) {
if (transitionList->animation(i).isEmpty()) {
transitionList->resize(i);
break;
}
}
if (transitionList->isEmpty()) {
clearTransitions();
return;
}
// Repeat patterns into layers that don't have some properties set.
transitionList->fillUnsetProperties();
// Make sure there are no duplicate properties.
// This is an O(n^2) algorithm but the lists tend to be short, so it is probably OK.
for (size_t i = 0; i < transitionList->size(); ++i) {
for (size_t j = i + 1; j < transitionList->size(); ++j) {
if (transitionList->animation(i).property() == transitionList->animation(j).property()) {
// toss i
transitionList->remove(i);
j = i;
}
}
}
}
AnimationList& RenderStyle::ensureAnimations()
{
if (!m_rareNonInheritedData.access().animations)
m_rareNonInheritedData.access().animations = makeUnique<AnimationList>();
return *m_rareNonInheritedData->animations;
}
AnimationList& RenderStyle::ensureTransitions()
{
if (!m_rareNonInheritedData.access().transitions)
m_rareNonInheritedData.access().transitions = makeUnique<AnimationList>();
return *m_rareNonInheritedData->transitions;
}
const Animation* RenderStyle::transitionForProperty(CSSPropertyID property) const
{
auto* transitions = this->transitions();
if (!transitions)
return nullptr;
for (size_t i = 0, size = transitions->size(); i < size; ++i) {
auto& animation = transitions->animation(i);
if (animation.animationMode() == Animation::AnimateAll || animation.property() == property)
return &animation;
}
return nullptr;
}
const FontCascade& RenderStyle::fontCascade() const
{
return m_inheritedData->fontCascade;
}
const FontMetrics& RenderStyle::fontMetrics() const
{
return m_inheritedData->fontCascade.fontMetrics();
}
const FontCascadeDescription& RenderStyle::fontDescription() const
{
return m_inheritedData->fontCascade.fontDescription();
}
float RenderStyle::specifiedFontSize() const
{
return fontDescription().specifiedSize();
}
float RenderStyle::computedFontSize() const
{
return fontDescription().computedSize();
}
unsigned RenderStyle::computedFontPixelSize() const
{
return fontDescription().computedPixelSize();
}
const Length& RenderStyle::wordSpacing() const
{
return m_rareInheritedData->wordSpacing;
}
float RenderStyle::letterSpacing() const
{
return m_inheritedData->fontCascade.letterSpacing();
}
bool RenderStyle::setFontDescription(FontCascadeDescription&& description)
{
if (m_inheritedData->fontCascade.fontDescription() == description)
return false;
auto& cascade = m_inheritedData.access().fontCascade;
cascade = { WTFMove(description), cascade.letterSpacing(), cascade.wordSpacing() };
return true;
}
const Length& RenderStyle::specifiedLineHeight() const
{
#if ENABLE(TEXT_AUTOSIZING)
return m_inheritedData->specifiedLineHeight;
#else
return m_inheritedData->lineHeight;
#endif
}
#if ENABLE(TEXT_AUTOSIZING)
void RenderStyle::setSpecifiedLineHeight(Length&& height)
{
SET_VAR(m_inheritedData, specifiedLineHeight, WTFMove(height));
}
#endif
const Length& RenderStyle::lineHeight() const
{
return m_inheritedData->lineHeight;
}
void RenderStyle::setLineHeight(Length&& height)
{
SET_VAR(m_inheritedData, lineHeight, WTFMove(height));
}
int RenderStyle::computedLineHeight() const
{
const Length& lh = lineHeight();
// Negative value means the line height is not set. Use the font's built-in spacing.
if (lh.isNegative())
return fontMetrics().lineSpacing();
if (lh.isPercentOrCalculated())
return minimumValueForLength(lh, computedFontPixelSize());
return clampTo<int>(lh.value());
}
void RenderStyle::setWordSpacing(Length&& value)
{
float fontWordSpacing;
switch (value.type()) {
case Auto:
fontWordSpacing = 0;
break;
case Percent:
fontWordSpacing = value.percent() * fontCascade().spaceWidth() / 100;
break;
case Fixed:
fontWordSpacing = value.value();
break;
case Calculated:
fontWordSpacing = value.nonNanCalculatedValue(maxValueForCssLength);
break;
default:
ASSERT_NOT_REACHED();
fontWordSpacing = 0;
break;
}
m_inheritedData.access().fontCascade.setWordSpacing(fontWordSpacing);
m_rareInheritedData.access().wordSpacing = WTFMove(value);
}
void RenderStyle::setLetterSpacing(float v) { m_inheritedData.access().fontCascade.setLetterSpacing(v); }
void RenderStyle::setFontSize(float size)
{
// size must be specifiedSize if Text Autosizing is enabled, but computedSize if text
// zoom is enabled (if neither is enabled it's irrelevant as they're probably the same).
ASSERT(std::isfinite(size));
if (!std::isfinite(size) || size < 0)
size = 0;
else
size = std::min(maximumAllowedFontSize, size);
FontSelector* currentFontSelector = fontCascade().fontSelector();
auto description = fontDescription();
description.setSpecifiedSize(size);
description.setComputedSize(size);
setFontDescription(WTFMove(description));
fontCascade().update(currentFontSelector);
}
#if ENABLE(VARIATION_FONTS)
void RenderStyle::setFontVariationSettings(FontVariationSettings settings)
{
FontSelector* currentFontSelector = fontCascade().fontSelector();
auto description = fontDescription();
description.setVariationSettings(WTFMove(settings));
setFontDescription(WTFMove(description));
fontCascade().update(currentFontSelector);
}
#endif
void RenderStyle::setFontWeight(FontSelectionValue value)
{
FontSelector* currentFontSelector = fontCascade().fontSelector();
auto description = fontDescription();
description.setWeight(value);
setFontDescription(WTFMove(description));
fontCascade().update(currentFontSelector);
}
void RenderStyle::setFontStretch(FontSelectionValue value)
{
FontSelector* currentFontSelector = fontCascade().fontSelector();
auto description = fontDescription();
description.setStretch(value);
setFontDescription(WTFMove(description));
fontCascade().update(currentFontSelector);
}
void RenderStyle::setFontItalic(Optional<FontSelectionValue> value)
{
FontSelector* currentFontSelector = fontCascade().fontSelector();
auto description = fontDescription();
description.setItalic(value);
setFontDescription(WTFMove(description));
fontCascade().update(currentFontSelector);
}
void RenderStyle::getShadowExtent(const ShadowData* shadow, LayoutUnit& top, LayoutUnit& right, LayoutUnit& bottom, LayoutUnit& left) const
{
top = 0;
right = 0;
bottom = 0;
left = 0;
for ( ; shadow; shadow = shadow->next()) {
if (shadow->style() == ShadowStyle::Inset)
continue;
auto extentAndSpread = shadow->paintingExtent() + shadow->spread();
top = std::min<LayoutUnit>(top, shadow->y() - extentAndSpread);
right = std::max<LayoutUnit>(right, shadow->x() + extentAndSpread);
bottom = std::max<LayoutUnit>(bottom, shadow->y() + extentAndSpread);
left = std::min<LayoutUnit>(left, shadow->x() - extentAndSpread);
}
}
LayoutBoxExtent RenderStyle::getShadowInsetExtent(const ShadowData* shadow) const
{
LayoutUnit top;
LayoutUnit right;
LayoutUnit bottom;
LayoutUnit left;
for ( ; shadow; shadow = shadow->next()) {
if (shadow->style() == ShadowStyle::Normal)
continue;
auto extentAndSpread = shadow->paintingExtent() + shadow->spread();
top = std::max<LayoutUnit>(top, shadow->y() + extentAndSpread);
right = std::min<LayoutUnit>(right, shadow->x() - extentAndSpread);
bottom = std::min<LayoutUnit>(bottom, shadow->y() - extentAndSpread);
left = std::max<LayoutUnit>(left, shadow->x() + extentAndSpread);
}
return LayoutBoxExtent(WTFMove(top), WTFMove(right), WTFMove(bottom), WTFMove(left));
}
void RenderStyle::getShadowHorizontalExtent(const ShadowData* shadow, LayoutUnit &left, LayoutUnit &right) const
{
left = 0;
right = 0;
for ( ; shadow; shadow = shadow->next()) {
if (shadow->style() == ShadowStyle::Inset)
continue;
auto extentAndSpread = shadow->paintingExtent() + shadow->spread();
left = std::min<LayoutUnit>(left, shadow->x() - extentAndSpread);
right = std::max<LayoutUnit>(right, shadow->x() + extentAndSpread);
}
}
void RenderStyle::getShadowVerticalExtent(const ShadowData* shadow, LayoutUnit &top, LayoutUnit &bottom) const
{
top = 0;
bottom = 0;
for ( ; shadow; shadow = shadow->next()) {
if (shadow->style() == ShadowStyle::Inset)
continue;
auto extentAndSpread = shadow->paintingExtent() + shadow->spread();
top = std::min<LayoutUnit>(top, shadow->y() - extentAndSpread);
bottom = std::max<LayoutUnit>(bottom, shadow->y() + extentAndSpread);
}
}
Color RenderStyle::colorIncludingFallback(CSSPropertyID colorProperty, bool visitedLink) const
{
Color result;
BorderStyle borderStyle = BorderStyle::None;
switch (colorProperty) {
case CSSPropertyBackgroundColor:
return visitedLink ? visitedLinkBackgroundColor() : backgroundColor(); // Background color doesn't fall back.
case CSSPropertyBorderLeftColor:
result = visitedLink ? visitedLinkBorderLeftColor() : borderLeftColor();
borderStyle = borderLeftStyle();
break;
case CSSPropertyBorderRightColor:
result = visitedLink ? visitedLinkBorderRightColor() : borderRightColor();
borderStyle = borderRightStyle();
break;
case CSSPropertyBorderTopColor:
result = visitedLink ? visitedLinkBorderTopColor() : borderTopColor();
borderStyle = borderTopStyle();
break;
case CSSPropertyBorderBottomColor:
result = visitedLink ? visitedLinkBorderBottomColor() : borderBottomColor();
borderStyle = borderBottomStyle();
break;
case CSSPropertyCaretColor:
result = visitedLink ? visitedLinkCaretColor() : caretColor();
break;
case CSSPropertyColor:
result = visitedLink ? visitedLinkColor() : color();
break;
case CSSPropertyOutlineColor:
result = visitedLink ? visitedLinkOutlineColor() : outlineColor();
break;
case CSSPropertyColumnRuleColor:
result = visitedLink ? visitedLinkColumnRuleColor() : columnRuleColor();
break;
case CSSPropertyTextDecorationColor:
// Text decoration color fallback is handled in RenderObject::decorationColor.
return visitedLink ? visitedLinkTextDecorationColor() : textDecorationColor();
case CSSPropertyWebkitTextEmphasisColor:
result = visitedLink ? visitedLinkTextEmphasisColor() : textEmphasisColor();
break;
case CSSPropertyWebkitTextFillColor:
result = visitedLink ? visitedLinkTextFillColor() : textFillColor();
break;
case CSSPropertyWebkitTextStrokeColor:
result = visitedLink ? visitedLinkTextStrokeColor() : textStrokeColor();
break;
case CSSPropertyStrokeColor:
result = visitedLink ? visitedLinkStrokeColor() : strokeColor();
break;
default:
ASSERT_NOT_REACHED();
break;
}
if (!result.isValid()) {
if (!visitedLink && (borderStyle == BorderStyle::Inset || borderStyle == BorderStyle::Outset || borderStyle == BorderStyle::Ridge || borderStyle == BorderStyle::Groove))
result = Color(238, 238, 238);
else
result = visitedLink ? visitedLinkColor() : color();
}
return result;
}
Color RenderStyle::visitedDependentColor(CSSPropertyID colorProperty) const
{
Color unvisitedColor = colorIncludingFallback(colorProperty, false);
if (insideLink() != InsideLink::InsideVisited)
return unvisitedColor;
Color visitedColor = colorIncludingFallback(colorProperty, true);
// Text decoration color validity is preserved (checked in RenderObject::decorationColor).
if (colorProperty == CSSPropertyTextDecorationColor)
return visitedColor;
// FIXME: Technically someone could explicitly specify the color transparent, but for now we'll just
// assume that if the background color is transparent that it wasn't set. Note that it's weird that
// we're returning unvisited info for a visited link, but given our restriction that the alpha values
// have to match, it makes more sense to return the unvisited background color if specified than it
// does to return black. This behavior matches what Firefox 4 does as well.
if (colorProperty == CSSPropertyBackgroundColor && visitedColor == Color::transparent)
return unvisitedColor;
// Take the alpha from the unvisited color, but get the RGB values from the visited color.
return visitedColor.colorWithAlpha(unvisitedColor.alphaAsFloat());
}
Color RenderStyle::visitedDependentColorWithColorFilter(CSSPropertyID colorProperty) const
{
if (!hasAppleColorFilter())
return visitedDependentColor(colorProperty);
return colorByApplyingColorFilter(visitedDependentColor(colorProperty));
}
Color RenderStyle::colorByApplyingColorFilter(const Color& color) const
{
Color transformedColor = color;
appleColorFilter().transformColor(transformedColor);
return transformedColor;
}
const BorderValue& RenderStyle::borderBefore() const
{
switch (writingMode()) {
case TopToBottomWritingMode:
return borderTop();
case BottomToTopWritingMode:
return borderBottom();
case LeftToRightWritingMode:
return borderLeft();
case RightToLeftWritingMode:
return borderRight();
}
ASSERT_NOT_REACHED();
return borderTop();
}
const BorderValue& RenderStyle::borderAfter() const
{
switch (writingMode()) {
case TopToBottomWritingMode:
return borderBottom();
case BottomToTopWritingMode:
return borderTop();
case LeftToRightWritingMode:
return borderRight();
case RightToLeftWritingMode:
return borderLeft();
}
ASSERT_NOT_REACHED();
return borderBottom();
}
const BorderValue& RenderStyle::borderStart() const
{
if (isHorizontalWritingMode())
return isLeftToRightDirection() ? borderLeft() : borderRight();
return isLeftToRightDirection() ? borderTop() : borderBottom();
}
const BorderValue& RenderStyle::borderEnd() const
{
if (isHorizontalWritingMode())
return isLeftToRightDirection() ? borderRight() : borderLeft();
return isLeftToRightDirection() ? borderBottom() : borderTop();
}
float RenderStyle::borderBeforeWidth() const
{
switch (writingMode()) {
case TopToBottomWritingMode:
return borderTopWidth();
case BottomToTopWritingMode:
return borderBottomWidth();
case LeftToRightWritingMode:
return borderLeftWidth();
case RightToLeftWritingMode:
return borderRightWidth();
}
ASSERT_NOT_REACHED();
return borderTopWidth();
}
float RenderStyle::borderAfterWidth() const
{
switch (writingMode()) {
case TopToBottomWritingMode:
return borderBottomWidth();
case BottomToTopWritingMode:
return borderTopWidth();
case LeftToRightWritingMode:
return borderRightWidth();
case RightToLeftWritingMode:
return borderLeftWidth();
}
ASSERT_NOT_REACHED();
return borderBottomWidth();
}
float RenderStyle::borderStartWidth() const
{
if (isHorizontalWritingMode())
return isLeftToRightDirection() ? borderLeftWidth() : borderRightWidth();
return isLeftToRightDirection() ? borderTopWidth() : borderBottomWidth();
}
float RenderStyle::borderEndWidth() const
{
if (isHorizontalWritingMode())
return isLeftToRightDirection() ? borderRightWidth() : borderLeftWidth();
return isLeftToRightDirection() ? borderBottomWidth() : borderTopWidth();
}
void RenderStyle::setMarginStart(Length&& margin)
{
if (isHorizontalWritingMode()) {
if (isLeftToRightDirection())
setMarginLeft(WTFMove(margin));
else
setMarginRight(WTFMove(margin));
} else {
if (isLeftToRightDirection())
setMarginTop(WTFMove(margin));
else
setMarginBottom(WTFMove(margin));
}
}
void RenderStyle::setMarginEnd(Length&& margin)
{
if (isHorizontalWritingMode()) {
if (isLeftToRightDirection())
setMarginRight(WTFMove(margin));
else
setMarginLeft(WTFMove(margin));
} else {
if (isLeftToRightDirection())
setMarginBottom(WTFMove(margin));
else
setMarginTop(WTFMove(margin));
}
}
TextEmphasisMark RenderStyle::textEmphasisMark() const
{
auto mark = static_cast<TextEmphasisMark>(m_rareInheritedData->textEmphasisMark);
if (mark != TextEmphasisMark::Auto)
return mark;
if (isHorizontalWritingMode())
return TextEmphasisMark::Dot;
return TextEmphasisMark::Sesame;
}
#if ENABLE(TOUCH_EVENTS)
Color RenderStyle::initialTapHighlightColor()
{
return RenderTheme::tapHighlightColor();
}
#endif
LayoutBoxExtent RenderStyle::imageOutsets(const NinePieceImage& image) const
{
return {
NinePieceImage::computeOutset(image.outset().top(), LayoutUnit(borderTopWidth())),
NinePieceImage::computeOutset(image.outset().right(), LayoutUnit(borderRightWidth())),
NinePieceImage::computeOutset(image.outset().bottom(), LayoutUnit(borderBottomWidth())),
NinePieceImage::computeOutset(image.outset().left(), LayoutUnit(borderLeftWidth()))
};
}
std::pair<FontOrientation, NonCJKGlyphOrientation> RenderStyle::fontAndGlyphOrientation()
{
// FIXME: TextOrientationSideways should map to sideways-left in vertical-lr, which is not supported yet.
if (isHorizontalWritingMode())
return { FontOrientation::Horizontal, NonCJKGlyphOrientation::Mixed };
switch (textOrientation()) {
case TextOrientation::Mixed:
return { FontOrientation::Vertical, NonCJKGlyphOrientation::Mixed };
case TextOrientation::Upright:
return { FontOrientation::Vertical, NonCJKGlyphOrientation::Upright };
case TextOrientation::Sideways:
return { FontOrientation::Horizontal, NonCJKGlyphOrientation::Mixed };
default:
ASSERT_NOT_REACHED();
return { FontOrientation::Horizontal, NonCJKGlyphOrientation::Mixed };
}
}
void RenderStyle::setBorderImageSource(RefPtr<StyleImage>&& image)
{
if (m_surroundData->border.m_image.image() == image.get())
return;
m_surroundData.access().border.m_image.setImage(WTFMove(image));
}
void RenderStyle::setBorderImageSlices(LengthBox&& slices)
{
if (m_surroundData->border.m_image.imageSlices() == slices)
return;
m_surroundData.access().border.m_image.setImageSlices(WTFMove(slices));
}
void RenderStyle::setBorderImageWidth(LengthBox&& slices)
{
if (m_surroundData->border.m_image.borderSlices() == slices)
return;
m_surroundData.access().border.m_image.setBorderSlices(WTFMove(slices));
}
void RenderStyle::setBorderImageOutset(LengthBox&& outset)
{
if (m_surroundData->border.m_image.outset() == outset)
return;
m_surroundData.access().border.m_image.setOutset(WTFMove(outset));
}
void RenderStyle::setColumnStylesFromPaginationMode(const Pagination::Mode& paginationMode)
{
if (paginationMode == Pagination::Unpaginated)
return;
setColumnFill(ColumnFill::Auto);
switch (paginationMode) {
case Pagination::LeftToRightPaginated:
setColumnAxis(ColumnAxis::Horizontal);
if (isHorizontalWritingMode())
setColumnProgression(isLeftToRightDirection() ? ColumnProgression::Normal : ColumnProgression::Reverse);
else
setColumnProgression(isFlippedBlocksWritingMode() ? ColumnProgression::Reverse : ColumnProgression::Normal);
break;
case Pagination::RightToLeftPaginated:
setColumnAxis(ColumnAxis::Horizontal);
if (isHorizontalWritingMode())
setColumnProgression(isLeftToRightDirection() ? ColumnProgression::Reverse : ColumnProgression::Normal);
else
setColumnProgression(isFlippedBlocksWritingMode() ? ColumnProgression::Normal : ColumnProgression::Reverse);
break;
case Pagination::TopToBottomPaginated:
setColumnAxis(ColumnAxis::Vertical);
if (isHorizontalWritingMode())
setColumnProgression(isFlippedBlocksWritingMode() ? ColumnProgression::Reverse : ColumnProgression::Normal);
else
setColumnProgression(isLeftToRightDirection() ? ColumnProgression::Normal : ColumnProgression::Reverse);
break;
case Pagination::BottomToTopPaginated:
setColumnAxis(ColumnAxis::Vertical);
if (isHorizontalWritingMode())
setColumnProgression(isFlippedBlocksWritingMode() ? ColumnProgression::Normal : ColumnProgression::Reverse);
else
setColumnProgression(isLeftToRightDirection() ? ColumnProgression::Reverse : ColumnProgression::Normal);
break;
case Pagination::Unpaginated:
ASSERT_NOT_REACHED();
break;
}
}
#if ENABLE(CSS_SCROLL_SNAP)
ScrollSnapType RenderStyle::initialScrollSnapType()
{
return { };
}
ScrollSnapAlign RenderStyle::initialScrollSnapAlign()
{
return { };
}
const StyleScrollSnapArea& RenderStyle::scrollSnapArea() const
{
return *m_rareNonInheritedData->scrollSnapArea;
}
const StyleScrollSnapPort& RenderStyle::scrollSnapPort() const
{
return *m_rareNonInheritedData->scrollSnapPort;
}
const ScrollSnapType& RenderStyle::scrollSnapType() const
{
return m_rareNonInheritedData->scrollSnapPort->type;
}
const LengthBox& RenderStyle::scrollPadding() const
{
return m_rareNonInheritedData->scrollSnapPort->scrollPadding;
}
const Length& RenderStyle::scrollPaddingTop() const
{
return scrollPadding().top();
}
const Length& RenderStyle::scrollPaddingBottom() const
{
return scrollPadding().bottom();
}
const Length& RenderStyle::scrollPaddingLeft() const
{
return scrollPadding().left();
}
const Length& RenderStyle::scrollPaddingRight() const
{
return scrollPadding().right();
}
const ScrollSnapAlign& RenderStyle::scrollSnapAlign() const
{
return m_rareNonInheritedData->scrollSnapArea->alignment;
}
const LengthBox& RenderStyle::scrollSnapMargin() const
{
return m_rareNonInheritedData->scrollSnapArea->scrollSnapMargin;
}
const Length& RenderStyle::scrollSnapMarginTop() const
{
return scrollSnapMargin().top();
}
const Length& RenderStyle::scrollSnapMarginBottom() const
{
return scrollSnapMargin().bottom();
}
const Length& RenderStyle::scrollSnapMarginLeft() const
{
return scrollSnapMargin().left();
}
const Length& RenderStyle::scrollSnapMarginRight() const
{
return scrollSnapMargin().right();
}
void RenderStyle::setScrollSnapType(const ScrollSnapType& type)
{
SET_NESTED_VAR(m_rareNonInheritedData, scrollSnapPort, type, type);
}
void RenderStyle::setScrollPaddingTop(Length&& length)
{
SET_NESTED_VAR(m_rareNonInheritedData, scrollSnapPort, scrollPadding.top(), WTFMove(length));
}
void RenderStyle::setScrollPaddingBottom(Length&& length)
{
SET_NESTED_VAR(m_rareNonInheritedData, scrollSnapPort, scrollPadding.bottom(), WTFMove(length));
}
void RenderStyle::setScrollPaddingLeft(Length&& length)
{
SET_NESTED_VAR(m_rareNonInheritedData, scrollSnapPort, scrollPadding.left(), WTFMove(length));
}
void RenderStyle::setScrollPaddingRight(Length&& length)
{
SET_NESTED_VAR(m_rareNonInheritedData, scrollSnapPort, scrollPadding.right(), WTFMove(length));
}
void RenderStyle::setScrollSnapAlign(const ScrollSnapAlign& alignment)
{
SET_NESTED_VAR(m_rareNonInheritedData, scrollSnapArea, alignment, alignment);
}
void RenderStyle::setScrollSnapMarginTop(Length&& length)
{
SET_NESTED_VAR(m_rareNonInheritedData, scrollSnapArea, scrollSnapMargin.top(), WTFMove(length));
}
void RenderStyle::setScrollSnapMarginBottom(Length&& length)
{
SET_NESTED_VAR(m_rareNonInheritedData, scrollSnapArea, scrollSnapMargin.bottom(), WTFMove(length));
}
void RenderStyle::setScrollSnapMarginLeft(Length&& length)
{
SET_NESTED_VAR(m_rareNonInheritedData, scrollSnapArea, scrollSnapMargin.left(), WTFMove(length));
}
void RenderStyle::setScrollSnapMarginRight(Length&& length)
{
SET_NESTED_VAR(m_rareNonInheritedData, scrollSnapArea, scrollSnapMargin.right(), WTFMove(length));
}
#endif
bool RenderStyle::hasReferenceFilterOnly() const
{
if (!hasFilter())
return false;
auto& filterOperations = m_rareNonInheritedData->filter->operations;
return filterOperations.size() == 1 && filterOperations.at(0)->type() == FilterOperation::REFERENCE;
}
float RenderStyle::outlineWidth() const
{
if (m_backgroundData->outline.style() == BorderStyle::None)
return 0;
if (outlineStyleIsAuto() == OutlineIsAuto::On)
return std::max(m_backgroundData->outline.width(), RenderTheme::platformFocusRingWidth());
return m_backgroundData->outline.width();
}
float RenderStyle::outlineOffset() const
{
if (m_backgroundData->outline.style() == BorderStyle::None)
return 0;
if (outlineStyleIsAuto() == OutlineIsAuto::On)
return (m_backgroundData->outline.offset() + RenderTheme::platformFocusRingOffset(outlineWidth()));
return m_backgroundData->outline.offset();
}
bool RenderStyle::shouldPlaceBlockDirectionScrollbarOnLeft() const
{
return !isLeftToRightDirection() && isHorizontalWritingMode();
}
Vector<PaintType, 3> RenderStyle::paintTypesForPaintOrder(PaintOrder order)
{
Vector<PaintType, 3> paintOrder;
switch (order) {
case PaintOrder::Normal:
FALLTHROUGH;
case PaintOrder::Fill:
paintOrder.append(PaintType::Fill);
paintOrder.append(PaintType::Stroke);
paintOrder.append(PaintType::Markers);
break;
case PaintOrder::FillMarkers:
paintOrder.append(PaintType::Fill);
paintOrder.append(PaintType::Markers);
paintOrder.append(PaintType::Stroke);
break;
case PaintOrder::Stroke:
paintOrder.append(PaintType::Stroke);
paintOrder.append(PaintType::Fill);
paintOrder.append(PaintType::Markers);
break;
case PaintOrder::StrokeMarkers:
paintOrder.append(PaintType::Stroke);
paintOrder.append(PaintType::Markers);
paintOrder.append(PaintType::Fill);
break;
case PaintOrder::Markers:
paintOrder.append(PaintType::Markers);
paintOrder.append(PaintType::Fill);
paintOrder.append(PaintType::Stroke);
break;
case PaintOrder::MarkersStroke:
paintOrder.append(PaintType::Markers);
paintOrder.append(PaintType::Stroke);
paintOrder.append(PaintType::Fill);
break;
};
return paintOrder;
}
float RenderStyle::computedStrokeWidth(const IntSize& viewportSize) const
{
// Use the stroke-width and stroke-color value combination only if stroke-color has been explicitly specified.
// Since there will be no visible stroke when stroke-color is not specified (transparent by default), we fall
// back to the legacy Webkit text stroke combination in that case.
if (!hasExplicitlySetStrokeColor())
return textStrokeWidth();
const Length& length = strokeWidth();
if (length.isPercent()) {
// According to the spec, https://drafts.fxtf.org/paint/#stroke-width, the percentage is relative to the scaled viewport size.
// The scaled viewport size is the geometric mean of the viewport width and height.
ExceptionOr<float> result = length.value() * (viewportSize.width() + viewportSize.height()) / 200.0f;
if (result.hasException())
return 0;
return result.releaseReturnValue();
}
if (length.isAuto() || !length.isSpecified())
return 0;
return floatValueForLength(length, viewportSize.width());
}
bool RenderStyle::hasPositiveStrokeWidth() const
{
if (!hasExplicitlySetStrokeWidth())
return textStrokeWidth() > 0;
return strokeWidth().isPositive();
}
Color RenderStyle::computedStrokeColor() const
{
CSSPropertyID propertyID = CSSPropertyStrokeColor;
if (!hasExplicitlySetStrokeColor())
propertyID = CSSPropertyWebkitTextStrokeColor;
return visitedDependentColor(propertyID);
}
} // namespace WebCore