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chromium / chromium / src / 261ddd76e3f59c55e8a946366195ac1b51a1cb26 / . / third_party / blink / renderer / core / style / computed_style.cc
blob: 16bb9ee24e1117a951a8267bce51178f9ef8cefd [file] [log] [blame]
/*
* Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 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 "third_party/blink/renderer/core/style/computed_style.h"
#include <algorithm>
#include <memory>
#include <utility>
#include "build/build_config.h"
#include "cc/input/overscroll_behavior.h"
#include "third_party/blink/renderer/core/animation/css/css_animation_data.h"
#include "third_party/blink/renderer/core/animation/css/css_transition_data.h"
#include "third_party/blink/renderer/core/css/css_paint_value.h"
#include "third_party/blink/renderer/core/css/css_primitive_value.h"
#include "third_party/blink/renderer/core/css/css_property_equality.h"
#include "third_party/blink/renderer/core/css/properties/css_property.h"
#include "third_party/blink/renderer/core/css/properties/longhand.h"
#include "third_party/blink/renderer/core/css/resolver/style_resolver.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/layout/custom/layout_worklet.h"
#include "third_party/blink/renderer/core/layout/layout_theme.h"
#include "third_party/blink/renderer/core/layout/text_autosizer.h"
#include "third_party/blink/renderer/core/style/applied_text_decoration.h"
#include "third_party/blink/renderer/core/style/border_edge.h"
#include "third_party/blink/renderer/core/style/computed_style_constants.h"
#include "third_party/blink/renderer/core/style/computed_style_initial_values.h"
#include "third_party/blink/renderer/core/style/content_data.h"
#include "third_party/blink/renderer/core/style/cursor_data.h"
#include "third_party/blink/renderer/core/style/data_equivalency.h"
#include "third_party/blink/renderer/core/style/quotes_data.h"
#include "third_party/blink/renderer/core/style/shadow_list.h"
#include "third_party/blink/renderer/core/style/style_difference.h"
#include "third_party/blink/renderer/core/style/style_image.h"
#include "third_party/blink/renderer/core/style/style_inherited_variables.h"
#include "third_party/blink/renderer/core/style/style_non_inherited_variables.h"
#include "third_party/blink/renderer/core/style/style_ray.h"
#include "third_party/blink/renderer/platform/fonts/font.h"
#include "third_party/blink/renderer/platform/fonts/font_selector.h"
#include "third_party/blink/renderer/platform/geometry/float_rounded_rect.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context.h"
#include "third_party/blink/renderer/platform/graphics/path.h"
#include "third_party/blink/renderer/platform/length_functions.h"
#include "third_party/blink/renderer/platform/text/capitalize.h"
#include "third_party/blink/renderer/platform/transforms/rotate_transform_operation.h"
#include "third_party/blink/renderer/platform/transforms/scale_transform_operation.h"
#include "third_party/blink/renderer/platform/transforms/translate_transform_operation.h"
#include "third_party/blink/renderer/platform/wtf/assertions.h"
#include "third_party/blink/renderer/platform/wtf/math_extras.h"
#include "third_party/blink/renderer/platform/wtf/saturated_arithmetic.h"
#include "third_party/blink/renderer/platform/wtf/size_assertions.h"
namespace blink {
struct SameSizeAsBorderValue {
RGBA32 color_;
unsigned bitfield_;
};
ASSERT_SIZE(BorderValue, SameSizeAsBorderValue);
// Since different compilers/architectures pack ComputedStyle differently,
// re-create the same structure for an accurate size comparison.
struct SameSizeAsComputedStyle : public RefCounted<SameSizeAsComputedStyle> {
struct ComputedStyleBase {
void* data_refs[7];
unsigned bitfields_[4];
} base_;
void* own_ptrs[1];
void* data_ref_svg_style;
};
// If this assert fails, it means that size of ComputedStyle has changed. Please
// check that you really *do* what to increase the size of ComputedStyle, then
// update the SameSizeAsComputedStyle struct to match the updated storage of
// ComputedStyle.
ASSERT_SIZE(ComputedStyle, SameSizeAsComputedStyle);
scoped_refptr<ComputedStyle> ComputedStyle::Create() {
return base::AdoptRef(new ComputedStyle(InitialStyle()));
}
scoped_refptr<ComputedStyle> ComputedStyle::CreateInitialStyle() {
return base::AdoptRef(new ComputedStyle());
}
ComputedStyle& ComputedStyle::MutableInitialStyle() {
LEAK_SANITIZER_DISABLED_SCOPE;
DEFINE_STATIC_REF(ComputedStyle, initial_style,
(ComputedStyle::CreateInitialStyle()));
return *initial_style;
}
void ComputedStyle::InvalidateInitialStyle() {
MutableInitialStyle().SetTapHighlightColor(
ComputedStyleInitialValues::InitialTapHighlightColor());
}
scoped_refptr<ComputedStyle> ComputedStyle::CreateAnonymousStyleWithDisplay(
const ComputedStyle& parent_style,
EDisplay display) {
scoped_refptr<ComputedStyle> new_style = ComputedStyle::Create();
new_style->InheritFrom(parent_style);
new_style->SetUnicodeBidi(parent_style.GetUnicodeBidi());
new_style->SetDisplay(display);
return new_style;
}
scoped_refptr<ComputedStyle>
ComputedStyle::CreateInheritedDisplayContentsStyleIfNeeded(
const ComputedStyle& parent_style,
const ComputedStyle& layout_parent_style) {
if (&parent_style == &layout_parent_style)
return nullptr;
if (parent_style.InheritedEqual(layout_parent_style))
return nullptr;
return ComputedStyle::CreateAnonymousStyleWithDisplay(parent_style,
EDisplay::kInline);
}
scoped_refptr<ComputedStyle> ComputedStyle::Clone(const ComputedStyle& other) {
return base::AdoptRef(new ComputedStyle(other));
}
ALWAYS_INLINE ComputedStyle::ComputedStyle()
: ComputedStyleBase(), RefCounted<ComputedStyle>() {
svg_style_.Init();
}
ALWAYS_INLINE ComputedStyle::ComputedStyle(const ComputedStyle& o)
: ComputedStyleBase(o),
RefCounted<ComputedStyle>(),
svg_style_(o.svg_style_) {}
static StyleRecalcChange DiffPseudoStyles(const ComputedStyle& old_style,
const ComputedStyle& new_style) {
// If the pseudoStyles have changed, ensure layoutObject triggers setStyle.
if (!old_style.HasAnyPublicPseudoStyles() &&
!new_style.HasAnyPublicPseudoStyles())
return kNoChange;
for (PseudoId pseudo_id = kFirstPublicPseudoId;
pseudo_id < kFirstInternalPseudoId;
pseudo_id = static_cast<PseudoId>(pseudo_id + 1)) {
if (!old_style.HasPseudoStyle(pseudo_id) &&
!new_style.HasPseudoStyle(pseudo_id))
continue;
const ComputedStyle* new_pseudo_style =
new_style.GetCachedPseudoStyle(pseudo_id);
if (!new_pseudo_style)
return kNoInherit;
const ComputedStyle* old_pseudo_style =
old_style.GetCachedPseudoStyle(pseudo_id);
if (old_pseudo_style && *old_pseudo_style != *new_pseudo_style)
return kNoInherit;
}
return kNoChange;
}
StyleRecalcChange ComputedStyle::StylePropagationDiff(
const ComputedStyle* old_style,
const ComputedStyle* new_style) {
// If the style has changed from display none or to display none, then the
// layout subtree needs to be reattached
if ((!old_style && new_style) || (old_style && !new_style))
return kReattach;
if (!old_style && !new_style)
return kNoChange;
if (old_style->Display() != new_style->Display() ||
old_style->HasPseudoStyle(kPseudoIdFirstLetter) !=
new_style->HasPseudoStyle(kPseudoIdFirstLetter) ||
!old_style->ContentDataEquivalent(*new_style) ||
old_style->HasTextCombine() != new_style->HasTextCombine())
return kReattach;
// We need to perform a reattach if a "display: layout(foo)" has changed to a
// "display: layout(bar)". This is because one custom layout could be
// registered and the other may not, affecting the box-tree construction.
if (old_style->DisplayLayoutCustomName() !=
new_style->DisplayLayoutCustomName()) {
return kReattach;
}
if (old_style->ForceLegacyLayout() != new_style->ForceLegacyLayout())
return kReattach;
bool independent_equal = old_style->IndependentInheritedEqual(*new_style);
bool non_independent_equal =
old_style->NonIndependentInheritedEqual(*new_style);
if (!independent_equal || !non_independent_equal) {
if (non_independent_equal && !old_style->HasExplicitlyInheritedProperties())
return kIndependentInherit;
return kInherit;
}
if (!old_style->LoadingCustomFontsEqual(*new_style) ||
old_style->JustifyItems() != new_style->JustifyItems())
return kInherit;
if (*old_style == *new_style)
return DiffPseudoStyles(*old_style, *new_style);
if (old_style->HasExplicitlyInheritedProperties())
return kInherit;
return kNoInherit;
}
void ComputedStyle::PropagateIndependentInheritedProperties(
const ComputedStyle& parent_style) {
ComputedStyleBase::PropagateIndependentInheritedProperties(parent_style);
}
StyleSelfAlignmentData ResolvedSelfAlignment(
const StyleSelfAlignmentData& value,
ItemPosition normal_value_behavior) {
if (value.GetPosition() == ItemPosition::kLegacy ||
value.GetPosition() == ItemPosition::kNormal ||
value.GetPosition() == ItemPosition::kAuto)
return {normal_value_behavior, OverflowAlignment::kDefault};
return value;
}
StyleSelfAlignmentData ComputedStyle::ResolvedAlignItems(
ItemPosition normal_value_behaviour) const {
// We will return the behaviour of 'normal' value if needed, which is specific
// of each layout model.
return ResolvedSelfAlignment(AlignItems(), normal_value_behaviour);
}
StyleSelfAlignmentData ComputedStyle::ResolvedAlignSelf(
ItemPosition normal_value_behaviour,
const ComputedStyle* parent_style) const {
// We will return the behaviour of 'normal' value if needed, which is specific
// of each layout model.
if (!parent_style || AlignSelfPosition() != ItemPosition::kAuto)
return ResolvedSelfAlignment(AlignSelf(), normal_value_behaviour);
// The 'auto' keyword computes to the parent's align-items computed value.
return parent_style->ResolvedAlignItems(normal_value_behaviour);
}
StyleSelfAlignmentData ComputedStyle::ResolvedJustifyItems(
ItemPosition normal_value_behaviour) const {
// We will return the behaviour of 'normal' value if needed, which is specific
// of each layout model.
return ResolvedSelfAlignment(JustifyItems(), normal_value_behaviour);
}
StyleSelfAlignmentData ComputedStyle::ResolvedJustifySelf(
ItemPosition normal_value_behaviour,
const ComputedStyle* parent_style) const {
// We will return the behaviour of 'normal' value if needed, which is specific
// of each layout model.
if (!parent_style || JustifySelfPosition() != ItemPosition::kAuto)
return ResolvedSelfAlignment(JustifySelf(), normal_value_behaviour);
// The auto keyword computes to the parent's justify-items computed value.
return parent_style->ResolvedJustifyItems(normal_value_behaviour);
}
StyleContentAlignmentData ResolvedContentAlignment(
const StyleContentAlignmentData& value,
const StyleContentAlignmentData& normal_behaviour) {
return (value.GetPosition() == ContentPosition::kNormal &&
value.Distribution() == ContentDistributionType::kDefault)
? normal_behaviour
: value;
}
StyleContentAlignmentData ComputedStyle::ResolvedAlignContent(
const StyleContentAlignmentData& normal_behaviour) const {
// We will return the behaviour of 'normal' value if needed, which is specific
// of each layout model.
return ResolvedContentAlignment(AlignContent(), normal_behaviour);
}
StyleContentAlignmentData ComputedStyle::ResolvedJustifyContent(
const StyleContentAlignmentData& normal_behaviour) const {
// We will return the behaviour of 'normal' value if needed, which is specific
// of each layout model.
return ResolvedContentAlignment(JustifyContent(), normal_behaviour);
}
static inline ContentPosition ResolvedContentAlignmentPosition(
const StyleContentAlignmentData& value,
const StyleContentAlignmentData& normal_value_behavior) {
return (value.GetPosition() == ContentPosition::kNormal &&
value.Distribution() == ContentDistributionType::kDefault)
? normal_value_behavior.GetPosition()
: value.GetPosition();
}
static inline ContentDistributionType ResolvedContentAlignmentDistribution(
const StyleContentAlignmentData& value,
const StyleContentAlignmentData& normal_value_behavior) {
return (value.GetPosition() == ContentPosition::kNormal &&
value.Distribution() == ContentDistributionType::kDefault)
? normal_value_behavior.Distribution()
: value.Distribution();
}
ContentPosition ComputedStyle::ResolvedJustifyContentPosition(
const StyleContentAlignmentData& normal_value_behavior) const {
return ResolvedContentAlignmentPosition(JustifyContent(),
normal_value_behavior);
}
ContentDistributionType ComputedStyle::ResolvedJustifyContentDistribution(
const StyleContentAlignmentData& normal_value_behavior) const {
return ResolvedContentAlignmentDistribution(JustifyContent(),
normal_value_behavior);
}
ContentPosition ComputedStyle::ResolvedAlignContentPosition(
const StyleContentAlignmentData& normal_value_behavior) const {
return ResolvedContentAlignmentPosition(AlignContent(),
normal_value_behavior);
}
ContentDistributionType ComputedStyle::ResolvedAlignContentDistribution(
const StyleContentAlignmentData& normal_value_behavior) const {
return ResolvedContentAlignmentDistribution(AlignContent(),
normal_value_behavior);
}
void ComputedStyle::InheritFrom(const ComputedStyle& inherit_parent,
IsAtShadowBoundary is_at_shadow_boundary) {
EUserModify current_user_modify = UserModify();
ComputedStyleBase::InheritFrom(inherit_parent, is_at_shadow_boundary);
if (svg_style_ != inherit_parent.svg_style_)
svg_style_.Access()->InheritFrom(inherit_parent.svg_style_.Get());
if (is_at_shadow_boundary == kAtShadowBoundary) {
// Even if surrounding content is user-editable, shadow DOM should act as a
// single unit, and not necessarily be editable
SetUserModify(current_user_modify);
}
}
void ComputedStyle::CopyNonInheritedFromCached(const ComputedStyle& other) {
DCHECK(MatchedPropertiesCache::IsStyleCacheable(other));
ComputedStyleBase::CopyNonInheritedFromCached(other);
// The flags are copied one-by-one because they contain
// bunch of stuff other than real style data.
// See comments for each skipped flag below.
// Correctly set during selector matching:
// m_styleType
// m_pseudoBits
// Set correctly while computing style for children:
// m_explicitInheritance
// The following flags are set during matching before we decide that we get a
// match in the MatchedPropertiesCache which in turn calls this method. The
// reason why we don't copy these flags is that they're already correctly set
// and that they may differ between elements which have the same set of
// matched properties. For instance, given the rule:
//
// :-webkit-any(:hover, :focus) { background-color: green }"
//
// A hovered element, and a focused element may use the same cached matched
// properties here, but the affectedBy flags will be set differently based on
// the matching order of the :-webkit-any components.
//
// m_emptyState
// m_affectedByFocus
// m_affectedByHover
// m_affectedByActive
// m_affectedByDrag
// m_isLink
if (svg_style_ != other.svg_style_)
svg_style_.Access()->CopyNonInheritedFromCached(other.svg_style_.Get());
}
bool ComputedStyle::operator==(const ComputedStyle& o) const {
return InheritedEqual(o) && NonInheritedEqual(o);
}
bool ComputedStyle::IsStyleAvailable() const {
return this != StyleResolver::StyleNotYetAvailable();
}
ComputedStyle* ComputedStyle::GetCachedPseudoStyle(PseudoId pid) const {
if (!cached_pseudo_styles_ || !cached_pseudo_styles_->size())
return nullptr;
if (StyleType() != kPseudoIdNone)
return nullptr;
for (size_t i = 0; i < cached_pseudo_styles_->size(); ++i) {
ComputedStyle* pseudo_style = cached_pseudo_styles_->at(i).get();
if (pseudo_style->StyleType() == pid)
return pseudo_style;
}
return nullptr;
}
ComputedStyle* ComputedStyle::AddCachedPseudoStyle(
scoped_refptr<ComputedStyle> pseudo) {
DCHECK(pseudo);
DCHECK_GT(pseudo->StyleType(), kPseudoIdNone);
ComputedStyle* result = pseudo.get();
if (!cached_pseudo_styles_)
cached_pseudo_styles_ = std::make_unique<PseudoStyleCache>();
cached_pseudo_styles_->push_back(std::move(pseudo));
return result;
}
void ComputedStyle::RemoveCachedPseudoStyle(PseudoId pid) {
if (!cached_pseudo_styles_)
return;
for (size_t i = 0; i < cached_pseudo_styles_->size(); ++i) {
ComputedStyle* pseudo_style = cached_pseudo_styles_->at(i).get();
if (pseudo_style->StyleType() == pid) {
cached_pseudo_styles_->EraseAt(i);
return;
}
}
}
bool ComputedStyle::InheritedEqual(const ComputedStyle& other) const {
return IndependentInheritedEqual(other) &&
NonIndependentInheritedEqual(other);
}
bool ComputedStyle::IndependentInheritedEqual(
const ComputedStyle& other) const {
return ComputedStyleBase::IndependentInheritedEqual(other);
}
bool ComputedStyle::NonIndependentInheritedEqual(
const ComputedStyle& other) const {
return ComputedStyleBase::NonIndependentInheritedEqual(other) &&
svg_style_->InheritedEqual(*other.svg_style_);
}
bool ComputedStyle::LoadingCustomFontsEqual(const ComputedStyle& other) const {
return GetFont().LoadingCustomFonts() == other.GetFont().LoadingCustomFonts();
}
bool ComputedStyle::NonInheritedEqual(const ComputedStyle& other) const {
// compare everything except the pseudoStyle pointer
return ComputedStyleBase::NonInheritedEqual(other) &&
svg_style_->NonInheritedEqual(*other.svg_style_);
}
bool ComputedStyle::InheritedDataShared(const ComputedStyle& other) const {
// This is a fast check that only looks if the data structures are shared.
return ComputedStyleBase::InheritedDataShared(other) &&
svg_style_.Get() == other.svg_style_.Get();
}
static bool DependenceOnContentHeightHasChanged(const ComputedStyle& a,
const ComputedStyle& b) {
// If top or bottom become auto/non-auto then it means we either have to solve
// height based on the content or stop doing so
// (http://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-height)
// - either way requires a layout.
return a.LogicalTop().IsAuto() != b.LogicalTop().IsAuto() ||
a.LogicalBottom().IsAuto() != b.LogicalBottom().IsAuto();
}
StyleDifference ComputedStyle::VisualInvalidationDiff(
const Document& document,
const ComputedStyle& other) const {
// Note, we use .Get() on each DataRef below because DataRef::operator== will
// do a deep compare, which is duplicate work when we're going to compare each
// property inside this function anyway.
StyleDifference diff;
if (svg_style_.Get() != other.svg_style_.Get())
diff = svg_style_->Diff(other.svg_style_.Get());
if ((!diff.NeedsFullLayout() || !diff.NeedsFullPaintInvalidation()) &&
DiffNeedsFullLayoutAndPaintInvalidation(other)) {
diff.SetNeedsFullLayout();
diff.SetNeedsPaintInvalidationObject();
}
if (!diff.NeedsFullLayout() && DiffNeedsFullLayout(document, other))
diff.SetNeedsFullLayout();
if (!diff.NeedsFullLayout() && !MarginEqual(other)) {
// Relative-positioned elements collapse their margins so need a full
// layout.
if (HasOutOfFlowPosition())
diff.SetNeedsPositionedMovementLayout();
else
diff.SetNeedsFullLayout();
}
if (!diff.NeedsFullLayout() && GetPosition() != EPosition::kStatic &&
!OffsetEqual(other)) {
// Optimize for the case where a positioned layer is moving but not changing
// size.
if (DependenceOnContentHeightHasChanged(*this, other))
diff.SetNeedsFullLayout();
else
diff.SetNeedsPositionedMovementLayout();
}
if (DiffNeedsPaintInvalidationSubtree(other))
diff.SetNeedsPaintInvalidationSubtree();
else if (DiffNeedsPaintInvalidationObject(other))
diff.SetNeedsPaintInvalidationObject();
if (DiffNeedsVisualRectUpdate(other))
diff.SetNeedsVisualRectUpdate();
UpdatePropertySpecificDifferences(other, diff);
// The following condition needs to be at last, because it may depend on
// conditions in diff computed above.
if (ScrollAnchorDisablingPropertyChanged(other, diff))
diff.SetScrollAnchorDisablingPropertyChanged();
// Cursors are not checked, since they will be set appropriately in response
// to mouse events, so they don't need to cause any paint invalidation or
// layout.
// Animations don't need to be checked either. We always set the new style on
// the layoutObject, so we will get a chance to fire off the resulting
// transition properly.
return diff;
}
bool ComputedStyle::ScrollAnchorDisablingPropertyChanged(
const ComputedStyle& other,
const StyleDifference& diff) const {
if (ComputedStyleBase::ScrollAnchorDisablingPropertyChanged(*this, other))
return true;
if (diff.TransformChanged())
return true;
return false;
}
bool ComputedStyle::DiffNeedsFullLayoutAndPaintInvalidation(
const ComputedStyle& other) const {
// FIXME: Not all cases in this method need both full layout and paint
// invalidation.
// Should move cases into DiffNeedsFullLayout() if
// - don't need paint invalidation at all;
// - or the layoutObject knows how to exactly invalidate paints caused by the
// layout change instead of forced full paint invalidation.
if (ComputedStyleBase::DiffNeedsFullLayoutAndPaintInvalidation(*this, other))
return true;
if (IsDisplayTableType(Display())) {
if (ComputedStyleBase::
DiffNeedsFullLayoutAndPaintInvalidationDisplayTableType(*this,
other))
return true;
// In the collapsing border model, 'hidden' suppresses other borders, while
// 'none' does not, so these style differences can be width differences.
if ((BorderCollapse() == EBorderCollapse::kCollapse) &&
((BorderTopStyle() == EBorderStyle::kHidden &&
other.BorderTopStyle() == EBorderStyle::kNone) ||
(BorderTopStyle() == EBorderStyle::kNone &&
other.BorderTopStyle() == EBorderStyle::kHidden) ||
(BorderBottomStyle() == EBorderStyle::kHidden &&
other.BorderBottomStyle() == EBorderStyle::kNone) ||
(BorderBottomStyle() == EBorderStyle::kNone &&
other.BorderBottomStyle() == EBorderStyle::kHidden) ||
(BorderLeftStyle() == EBorderStyle::kHidden &&
other.BorderLeftStyle() == EBorderStyle::kNone) ||
(BorderLeftStyle() == EBorderStyle::kNone &&
other.BorderLeftStyle() == EBorderStyle::kHidden) ||
(BorderRightStyle() == EBorderStyle::kHidden &&
other.BorderRightStyle() == EBorderStyle::kNone) ||
(BorderRightStyle() == EBorderStyle::kNone &&
other.BorderRightStyle() == EBorderStyle::kHidden)))
return true;
} else if (Display() == EDisplay::kListItem) {
if (ComputedStyleBase::
DiffNeedsFullLayoutAndPaintInvalidationDisplayListItem(*this,
other))
return true;
}
if ((Visibility() == EVisibility::kCollapse) !=
(other.Visibility() == EVisibility::kCollapse))
return true;
// Movement of non-static-positioned object is special cased in
// ComputedStyle::VisualInvalidationDiff().
return false;
}
bool ComputedStyle::DiffNeedsFullLayout(const Document& document,
const ComputedStyle& other) const {
if (ComputedStyleBase::DiffNeedsFullLayout(*this, other))
return true;
if (IsDisplayLayoutCustomBox()) {
if (DiffNeedsFullLayoutForLayoutCustom(document, other))
return true;
}
if (DisplayLayoutCustomParentName()) {
if (DiffNeedsFullLayoutForLayoutCustomChild(document, other))
return true;
}
return false;
}
bool ComputedStyle::DiffNeedsFullLayoutForLayoutCustom(
const Document& document,
const ComputedStyle& other) const {
DCHECK(IsDisplayLayoutCustomBox());
LayoutWorklet* worklet = LayoutWorklet::From(*document.domWindow());
const AtomicString& name = DisplayLayoutCustomName();
if (!worklet->GetDocumentDefinitionMap()->Contains(name))
return false;
const DocumentLayoutDefinition* definition =
worklet->GetDocumentDefinitionMap()->at(name);
if (definition == kInvalidDocumentLayoutDefinition)
return false;
if (!PropertiesEqual(definition->NativeInvalidationProperties(), other))
return true;
if (!CustomPropertiesEqual(definition->CustomInvalidationProperties(), other))
return true;
return false;
}
bool ComputedStyle::DiffNeedsFullLayoutForLayoutCustomChild(
const Document& document,
const ComputedStyle& other) const {
LayoutWorklet* worklet = LayoutWorklet::From(*document.domWindow());
const AtomicString& name = DisplayLayoutCustomParentName();
if (!worklet->GetDocumentDefinitionMap()->Contains(name))
return false;
const DocumentLayoutDefinition* definition =
worklet->GetDocumentDefinitionMap()->at(name);
if (definition == kInvalidDocumentLayoutDefinition)
return false;
if (!PropertiesEqual(definition->ChildNativeInvalidationProperties(), other))
return true;
if (!CustomPropertiesEqual(definition->ChildCustomInvalidationProperties(),
other))
return true;
return false;
}
bool ComputedStyle::DiffNeedsPaintInvalidationSubtree(
const ComputedStyle& other) const {
return ComputedStyleBase::DiffNeedsPaintInvalidationSubtree(*this, other);
}
bool ComputedStyle::DiffNeedsPaintInvalidationObject(
const ComputedStyle& other) const {
if (ComputedStyleBase::DiffNeedsPaintInvalidationObject(*this, other))
return true;
if (!BorderVisuallyEqual(other) || !RadiiEqual(other) ||
!BackgroundVisuallyEqual(other))
return true;
if (PaintImagesInternal()) {
for (const auto& image : *PaintImagesInternal()) {
DCHECK(image);
if (DiffNeedsPaintInvalidationObjectForPaintImage(*image, other))
return true;
}
}
return false;
}
bool ComputedStyle::DiffNeedsPaintInvalidationObjectForPaintImage(
const StyleImage& image,
const ComputedStyle& other) const {
// https://crbug.com/835589: early exit when paint target is associated with
// a link.
if (InsideLink() != EInsideLink::kNotInsideLink)
return false;
CSSPaintValue* value = ToCSSPaintValue(image.CssValue());
// NOTE: If the invalidation properties vectors are null, we are invalid as
// we haven't yet been painted (and can't provide the invalidation
// properties yet).
if (!value->NativeInvalidationProperties() ||
!value->CustomInvalidationProperties())
return true;
if (!PropertiesEqual(*value->NativeInvalidationProperties(), other))
return true;
if (!CustomPropertiesEqual(*value->CustomInvalidationProperties(), other))
return true;
return false;
}
bool ComputedStyle::PropertiesEqual(const Vector<CSSPropertyID>& properties,
const ComputedStyle& other) const {
for (CSSPropertyID property_id : properties) {
// TODO(ikilpatrick): remove IsInterpolableProperty check once
// CSSPropertyEquality::PropertiesEqual correctly handles all properties.
const CSSProperty& property = CSSProperty::Get(property_id);
if (!property.IsInterpolable() ||
!CSSPropertyEquality::PropertiesEqual(PropertyHandle(property), *this,
other))
return false;
}
return true;
}
bool ComputedStyle::CustomPropertiesEqual(
const Vector<AtomicString>& properties,
const ComputedStyle& other) const {
// Short-circuit if neither of the styles have custom properties.
if (!InheritedVariables() && !NonInheritedVariables() &&
!other.InheritedVariables() && !other.NonInheritedVariables())
return true;
for (const AtomicString& property_name : properties) {
if (!DataEquivalent(GetVariable(property_name),
other.GetVariable(property_name)))
return false;
}
return true;
}
// This doesn't include conditions needing layout or overflow recomputation
// which implies visual rect update.
bool ComputedStyle::DiffNeedsVisualRectUpdate(
const ComputedStyle& other) const {
// Visual rect is empty if visibility is hidden. Also need to update visual
// rect of the resizer.
return ComputedStyleBase::DiffNeedsVisualRectUpdate(*this, other);
}
void ComputedStyle::UpdatePropertySpecificDifferences(
const ComputedStyle& other,
StyleDifference& diff) const {
if (ComputedStyleBase::UpdatePropertySpecificDifferencesZIndex(*this, other))
diff.SetZIndexChanged();
if (UpdatePropertySpecificDifferencesTransform(*this, other))
diff.SetTransformChanged();
if (ComputedStyleBase::UpdatePropertySpecificDifferencesOpacity(*this, other))
diff.SetOpacityChanged();
if (ComputedStyleBase::UpdatePropertySpecificDifferencesFilter(*this, other))
diff.SetFilterChanged();
if (ComputedStyleBase::
UpdatePropertySpecificDifferencesNeedsRecomputeOverflow(*this, other))
diff.SetNeedsRecomputeOverflow();
if (ComputedStyleBase::UpdatePropertySpecificDifferencesBackdropFilter(*this,
other))
diff.SetBackdropFilterChanged();
if (!diff.NeedsFullPaintInvalidation() &&
ComputedStyleBase::UpdatePropertySpecificDifferencesTextDecorationOrColor(
*this, other)) {
diff.SetTextDecorationOrColorChanged();
}
bool has_clip = HasOutOfFlowPosition() && !HasAutoClip();
bool other_has_clip = other.HasOutOfFlowPosition() && !other.HasAutoClip();
if (has_clip != other_has_clip ||
(has_clip && Clip() != other.Clip()))
diff.SetCSSClipChanged();
if (HasCurrentTransformAnimation() != other.HasCurrentTransformAnimation() ||
HasCurrentOpacityAnimation() != other.HasCurrentOpacityAnimation() ||
HasCurrentFilterAnimation() != other.HasCurrentFilterAnimation() ||
HasCurrentBackdropFilterAnimation() !=
other.HasCurrentBackdropFilterAnimation() ||
HasInlineTransform() != other.HasInlineTransform() ||
BackfaceVisibility() != other.BackfaceVisibility() ||
HasWillChangeCompositingHint() != other.HasWillChangeCompositingHint() ||
UsedTransformStyle3D() != other.UsedTransformStyle3D() ||
ContainsPaint() != other.ContainsPaint() ||
IsOverflowVisible() != other.IsOverflowVisible()) {
diff.SetCompositingReasonsChanged();
}
}
void ComputedStyle::AddPaintImage(StyleImage* image) {
if (!MutablePaintImagesInternal()) {
SetPaintImagesInternal(std::make_unique<PaintImages>());
}
MutablePaintImagesInternal()->push_back(image);
}
void ComputedStyle::AddCursor(StyleImage* image,
bool hot_spot_specified,
const IntPoint& hot_spot) {
if (!CursorDataInternal())
SetCursorDataInternal(new CursorList);
MutableCursorDataInternal()->push_back(
CursorData(image, hot_spot_specified, hot_spot));
}
void ComputedStyle::SetCursorList(CursorList* other) {
SetCursorDataInternal(other);
}
bool ComputedStyle::QuotesDataEquivalent(const ComputedStyle& other) const {
return DataEquivalent(Quotes(), other.Quotes());
}
void ComputedStyle::ClearCursorList() {
if (CursorDataInternal())
SetCursorDataInternal(nullptr);
}
static bool HasPropertyThatCreatesStackingContext(
const Vector<CSSPropertyID>& properties) {
for (CSSPropertyID property : properties) {
switch (property) {
case CSSPropertyOpacity:
case CSSPropertyTransform:
case CSSPropertyAliasWebkitTransform:
case CSSPropertyTransformStyle:
case CSSPropertyAliasWebkitTransformStyle:
case CSSPropertyPerspective:
case CSSPropertyAliasWebkitPerspective:
case CSSPropertyTranslate:
case CSSPropertyRotate:
case CSSPropertyScale:
case CSSPropertyOffsetPath:
case CSSPropertyOffsetPosition:
case CSSPropertyWebkitMask:
case CSSPropertyWebkitMaskBoxImage:
case CSSPropertyClipPath:
case CSSPropertyAliasWebkitClipPath:
case CSSPropertyWebkitBoxReflect:
case CSSPropertyFilter:
case CSSPropertyAliasWebkitFilter:
case CSSPropertyBackdropFilter:
case CSSPropertyZIndex:
case CSSPropertyPosition:
case CSSPropertyMixBlendMode:
case CSSPropertyIsolation:
return true;
default:
break;
}
}
return false;
}
void ComputedStyle::UpdateIsStackingContext(bool is_document_element,
bool is_in_top_layer,
bool is_svg_stacking) {
if (IsStackingContext())
return;
// Force a stacking context for transform-style: preserve-3d. This happens
// even if preserves-3d is ignored due to a 'grouping property' being present
// which requires flattening. See ComputedStyle::UsedTransformStyle3D() and
// ComputedStyle::HasGroupingProperty().
// This is legacy behavior that is left ambiguous in the official specs.
// See crbug.com/663650 for more details."
if (TransformStyle3D() == ETransformStyle3D::kPreserve3d) {
SetIsStackingContext(true);
return;
}
if (is_document_element || is_in_top_layer || is_svg_stacking ||
StyleType() == kPseudoIdBackdrop || HasOpacity() ||
HasTransformRelatedProperty() || HasMask() || ClipPath() ||
BoxReflect() || HasFilterInducingProperty() || HasBackdropFilter() ||
HasBlendMode() || HasIsolation() || HasViewportConstrainedPosition() ||
GetPosition() == EPosition::kSticky ||
HasPropertyThatCreatesStackingContext(WillChangeProperties()) ||
ContainsPaint()) {
SetIsStackingContext(true);
}
}
void ComputedStyle::AddCallbackSelector(const String& selector) {
if (!CallbackSelectorsInternal().Contains(selector))
MutableCallbackSelectorsInternal().push_back(selector);
}
void ComputedStyle::SetContent(ContentData* content_data) {
SetContentInternal(content_data);
}
bool ComputedStyle::HasWillChangeCompositingHint() const {
for (size_t i = 0; i < WillChangeProperties().size(); ++i) {
switch (WillChangeProperties()[i]) {
case CSSPropertyOpacity:
case CSSPropertyTransform:
case CSSPropertyAliasWebkitTransform:
case CSSPropertyTranslate:
case CSSPropertyScale:
case CSSPropertyRotate:
case CSSPropertyTop:
case CSSPropertyLeft:
case CSSPropertyBottom:
case CSSPropertyRight:
return true;
default:
break;
}
}
return false;
}
bool ComputedStyle::HasWillChangeTransformHint() const {
for (const auto& property : WillChangeProperties()) {
switch (property) {
case CSSPropertyTransform:
case CSSPropertyAliasWebkitTransform:
case CSSPropertyPerspective:
case CSSPropertyTranslate:
case CSSPropertyScale:
case CSSPropertyRotate:
case CSSPropertyOffsetPath:
case CSSPropertyOffsetPosition:
return true;
default:
break;
}
}
return false;
}
bool ComputedStyle::RequireTransformOrigin(
ApplyTransformOrigin apply_origin,
ApplyMotionPath apply_motion_path) const {
// transform-origin brackets the transform with translate operations.
// Optimize for the case where the only transform is a translation, since the
// transform-origin is irrelevant in that case.
if (apply_origin != kIncludeTransformOrigin)
return false;
if (apply_motion_path == kIncludeMotionPath)
return true;
for (const auto& operation : Transform().Operations()) {
TransformOperation::OperationType type = operation->GetType();
if (type != TransformOperation::kTranslateX &&
type != TransformOperation::kTranslateY &&
type != TransformOperation::kTranslate &&
type != TransformOperation::kTranslateZ &&
type != TransformOperation::kTranslate3D)
return true;
}
return Scale() || Rotate();
}
InterpolationQuality ComputedStyle::GetInterpolationQuality() const {
if (ImageRendering() == EImageRendering::kPixelated)
return kInterpolationNone;
if (ImageRendering() == EImageRendering::kWebkitOptimizeContrast)
return kInterpolationLow;
return kInterpolationDefault;
}
void ComputedStyle::ApplyTransform(
TransformationMatrix& result,
const LayoutSize& border_box_size,
ApplyTransformOrigin apply_origin,
ApplyMotionPath apply_motion_path,
ApplyIndependentTransformProperties apply_independent_transform_properties)
const {
ApplyTransform(result, FloatRect(FloatPoint(), FloatSize(border_box_size)),
apply_origin, apply_motion_path,
apply_independent_transform_properties);
}
void ComputedStyle::ApplyTransform(
TransformationMatrix& result,
const FloatRect& bounding_box,
ApplyTransformOrigin apply_origin,
ApplyMotionPath apply_motion_path,
ApplyIndependentTransformProperties apply_independent_transform_properties)
const {
if (!HasOffset())
apply_motion_path = kExcludeMotionPath;
bool apply_transform_origin =
RequireTransformOrigin(apply_origin, apply_motion_path);
float origin_x = 0;
float origin_y = 0;
float origin_z = 0;
const FloatSize& box_size = bounding_box.Size();
if (apply_transform_origin ||
// We need to calculate originX and originY for applying motion path.
apply_motion_path == kIncludeMotionPath) {
origin_x = FloatValueForLength(TransformOriginX(), box_size.Width()) +
bounding_box.X();
origin_y = FloatValueForLength(TransformOriginY(), box_size.Height()) +
bounding_box.Y();
if (apply_transform_origin) {
origin_z = TransformOriginZ();
result.Translate3d(origin_x, origin_y, origin_z);
}
}
if (apply_independent_transform_properties ==
kIncludeIndependentTransformProperties) {
if (Translate())
Translate()->Apply(result, box_size);
if (Rotate())
Rotate()->Apply(result, box_size);
if (Scale())
Scale()->Apply(result, box_size);
}
if (apply_motion_path == kIncludeMotionPath)
ApplyMotionPathTransform(origin_x, origin_y, bounding_box, result);
for (const auto& operation : Transform().Operations())
operation->Apply(result, box_size);
if (apply_transform_origin) {
result.Translate3d(-origin_x, -origin_y, -origin_z);
}
}
bool ComputedStyle::HasFilters() const {
return FilterInternal().Get() && !FilterInternal()->operations_.IsEmpty();
}
void ComputedStyle::ApplyMotionPathTransform(
float origin_x,
float origin_y,
const FloatRect& bounding_box,
TransformationMatrix& transform) const {
// TODO(ericwilligers): crbug.com/638055 Apply offset-position.
if (!OffsetPath()) {
return;
}
const LengthPoint& position = OffsetPosition();
const LengthPoint& anchor = OffsetAnchor();
const Length& distance = OffsetDistance();
const BasicShape* path = OffsetPath();
const StyleOffsetRotation& rotate = OffsetRotate();
FloatPoint point;
float angle;
if (path->GetType() == BasicShape::kStyleRayType) {
// TODO(ericwilligers): crbug.com/641245 Support <size> for ray paths.
float float_distance = FloatValueForLength(distance, 0);
angle = ToStyleRay(*path).Angle() - 90;
point.SetX(float_distance * cos(deg2rad(angle)));
point.SetY(float_distance * sin(deg2rad(angle)));
} else {
float zoom = EffectiveZoom();
const StylePath& motion_path = ToStylePath(*path);
float path_length = motion_path.length();
float float_distance =
FloatValueForLength(distance, path_length * zoom) / zoom;
float computed_distance;
if (motion_path.IsClosed() && path_length > 0) {
computed_distance = fmod(float_distance, path_length);
if (computed_distance < 0)
computed_distance += path_length;
} else {
computed_distance = clampTo<float>(float_distance, 0, path_length);
}
motion_path.GetPath().PointAndNormalAtLength(computed_distance, point,
angle);
point.Scale(zoom, zoom);
}
if (rotate.type == OffsetRotationType::kFixed)
angle = 0;
float origin_shift_x = 0;
float origin_shift_y = 0;
// If the offset-position and offset-anchor properties are not yet enabled,
// they will have the default value, auto.
FloatPoint anchor_point(origin_x, origin_y);
if (!position.X().IsAuto() || !anchor.X().IsAuto()) {
anchor_point = FloatPointForLengthPoint(anchor, bounding_box.Size());
anchor_point += bounding_box.Location();
// Shift the origin from transform-origin to offset-anchor.
origin_shift_x = anchor_point.X() - origin_x;
origin_shift_y = anchor_point.Y() - origin_y;
}
transform.Translate(point.X() - anchor_point.X() + origin_shift_x,
point.Y() - anchor_point.Y() + origin_shift_y);
transform.Rotate(angle + rotate.angle);
if (!position.X().IsAuto() || !anchor.X().IsAuto())
// Shift the origin back to transform-origin.
transform.Translate(-origin_shift_x, -origin_shift_y);
}
bool ComputedStyle::TextShadowDataEquivalent(const ComputedStyle& other) const {
return DataEquivalent(TextShadow(), other.TextShadow());
}
StyleImage* ComputedStyle::ListStyleImage() const {
return ListStyleImageInternal();
}
void ComputedStyle::SetListStyleImage(StyleImage* v) {
SetListStyleImageInternal(v);
}
Color ComputedStyle::GetColor() const {
return ColorInternal();
}
void ComputedStyle::SetColor(const Color& v) {
SetColorInternal(v);
}
static FloatRoundedRect::Radii CalcRadiiFor(const LengthSize& top_left,
const LengthSize& top_right,
const LengthSize& bottom_left,
const LengthSize& bottom_right,
FloatSize size) {
return FloatRoundedRect::Radii(FloatSizeForLengthSize(top_left, size),
FloatSizeForLengthSize(top_right, size),
FloatSizeForLengthSize(bottom_left, size),
FloatSizeForLengthSize(bottom_right, size));
}
FloatRoundedRect ComputedStyle::GetRoundedBorderFor(
const LayoutRect& border_rect,
bool include_logical_left_edge,
bool include_logical_right_edge) const {
FloatRoundedRect rounded_rect(PixelSnappedIntRect(border_rect));
if (HasBorderRadius()) {
FloatRoundedRect::Radii radii = CalcRadiiFor(
BorderTopLeftRadius(), BorderTopRightRadius(), BorderBottomLeftRadius(),
BorderBottomRightRadius(), FloatSize(border_rect.Size()));
rounded_rect.IncludeLogicalEdges(radii, IsHorizontalWritingMode(),
include_logical_left_edge,
include_logical_right_edge);
rounded_rect.ConstrainRadii();
}
return rounded_rect;
}
FloatRoundedRect ComputedStyle::GetRoundedInnerBorderFor(
const LayoutRect& border_rect,
bool include_logical_left_edge,
bool include_logical_right_edge) const {
bool horizontal = IsHorizontalWritingMode();
int left_width = (!horizontal || include_logical_left_edge)
? roundf(BorderLeftWidth())
: 0;
int right_width = (!horizontal || include_logical_right_edge)
? roundf(BorderRightWidth())
: 0;
int top_width =
(horizontal || include_logical_left_edge) ? roundf(BorderTopWidth()) : 0;
int bottom_width = (horizontal || include_logical_right_edge)
? roundf(BorderBottomWidth())
: 0;
return GetRoundedInnerBorderFor(
border_rect,
LayoutRectOutsets(-top_width, -right_width, -bottom_width, -left_width),
include_logical_left_edge, include_logical_right_edge);
}
FloatRoundedRect ComputedStyle::GetRoundedInnerBorderFor(
const LayoutRect& border_rect,
const LayoutRectOutsets& insets,
bool include_logical_left_edge,
bool include_logical_right_edge) const {
LayoutRect inner_rect(border_rect);
inner_rect.Expand(insets);
LayoutSize inner_rect_size = inner_rect.Size();
inner_rect_size.ClampNegativeToZero();
inner_rect.SetSize(inner_rect_size);
FloatRoundedRect rounded_rect(PixelSnappedIntRect(inner_rect));
if (HasBorderRadius()) {
FloatRoundedRect::Radii radii = GetRoundedBorderFor(border_rect).GetRadii();
// Insets use negative values.
radii.Shrink(-insets.Top().ToFloat(), -insets.Bottom().ToFloat(),
-insets.Left().ToFloat(), -insets.Right().ToFloat());
rounded_rect.IncludeLogicalEdges(radii, IsHorizontalWritingMode(),
include_logical_left_edge,
include_logical_right_edge);
}
return rounded_rect;
}
bool ComputedStyle::CanRenderBorderImage() const {
if (!HasBorderDecoration())
return false;
StyleImage* border_image = BorderImage().GetImage();
return border_image && border_image->CanRender() && border_image->IsLoaded();
}
static bool AllLayersAreFixed(const FillLayer& layer) {
for (const FillLayer* curr_layer = &layer; curr_layer;
curr_layer = curr_layer->Next()) {
if (!curr_layer->GetImage() ||
curr_layer->Attachment() != EFillAttachment::kFixed)
return false;
}
return true;
}
bool ComputedStyle::HasEntirelyFixedBackground() const {
return AllLayersAreFixed(BackgroundLayers());
}
const CounterDirectiveMap* ComputedStyle::GetCounterDirectives() const {
return CounterDirectivesInternal().get();
}
CounterDirectiveMap& ComputedStyle::AccessCounterDirectives() {
std::unique_ptr<CounterDirectiveMap>& map =
MutableCounterDirectivesInternal();
if (!map)
map = std::make_unique<CounterDirectiveMap>();
return *map;
}
const CounterDirectives ComputedStyle::GetCounterDirectives(
const AtomicString& identifier) const {
if (const CounterDirectiveMap* directives = GetCounterDirectives())
return directives->at(identifier);
return CounterDirectives();
}
void ComputedStyle::ClearIncrementDirectives() {
if (!GetCounterDirectives())
return;
// This makes us copy even if we may not be removing any items.
CounterDirectiveMap& map = AccessCounterDirectives();
typedef CounterDirectiveMap::iterator Iterator;
Iterator end = map.end();
for (Iterator it = map.begin(); it != end; ++it)
it->value.ClearIncrement();
}
void ComputedStyle::ClearResetDirectives() {
if (!GetCounterDirectives())
return;
// This makes us copy even if we may not be removing any items.
CounterDirectiveMap& map = AccessCounterDirectives();
typedef CounterDirectiveMap::iterator Iterator;
Iterator end = map.end();
for (Iterator it = map.begin(); it != end; ++it)
it->value.ClearReset();
}
AtomicString ComputedStyle::LocaleForLineBreakIterator() const {
LineBreakIteratorMode mode = LineBreakIteratorMode::kDefault;
switch (GetLineBreak()) {
case LineBreak::kAuto:
case LineBreak::kAfterWhiteSpace:
return Locale();
case LineBreak::kNormal:
mode = LineBreakIteratorMode::kNormal;
break;
case LineBreak::kStrict:
mode = LineBreakIteratorMode::kStrict;
break;
case LineBreak::kLoose:
mode = LineBreakIteratorMode::kLoose;
break;
}
if (const LayoutLocale* locale = GetFontDescription().Locale())
return locale->LocaleWithBreakKeyword(mode);
return Locale();
}
Hyphenation* ComputedStyle::GetHyphenation() const {
return GetHyphens() == Hyphens::kAuto
? GetFontDescription().LocaleOrDefault().GetHyphenation()
: nullptr;
}
const AtomicString& ComputedStyle::HyphenString() const {
const AtomicString& hyphenation_string = HyphenationString();
if (!hyphenation_string.IsNull())
return hyphenation_string;
// FIXME: This should depend on locale.
DEFINE_STATIC_LOCAL(AtomicString, hyphen_minus_string,
(&kHyphenMinusCharacter, 1));
DEFINE_STATIC_LOCAL(AtomicString, hyphen_string, (&kHyphenCharacter, 1));
const SimpleFontData* primary_font = GetFont().PrimaryFont();
DCHECK(primary_font);
return primary_font && primary_font->GlyphForCharacter(kHyphenCharacter)
? hyphen_string
: hyphen_minus_string;
}
ETextAlign ComputedStyle::GetTextAlign(bool is_last_line) const {
if (!is_last_line)
return GetTextAlign();
// When this is the last line of a block, or the line ends with a forced line
// break.
// https://drafts.csswg.org/css-text-3/#propdef-text-align-last
switch (TextAlignLast()) {
case ETextAlignLast::kStart:
return ETextAlign::kStart;
case ETextAlignLast::kEnd:
return ETextAlign::kEnd;
case ETextAlignLast::kLeft:
return ETextAlign::kLeft;
case ETextAlignLast::kRight:
return ETextAlign::kRight;
case ETextAlignLast::kCenter:
return ETextAlign::kCenter;
case ETextAlignLast::kJustify:
return ETextAlign::kJustify;
case ETextAlignLast::kAuto:
ETextAlign text_align = GetTextAlign();
if (text_align == ETextAlign::kJustify)
return ETextAlign::kStart;
return text_align;
}
NOTREACHED();
return GetTextAlign();
}
bool ComputedStyle::ShouldUseTextIndent(bool is_first_line,
bool is_after_forced_break) const {
bool should_use =
is_first_line || (is_after_forced_break &&
GetTextIndentLine() != TextIndentLine::kFirstLine);
return GetTextIndentType() == TextIndentType::kNormal ? should_use
: !should_use;
}
void ComputedStyle::ApplyTextTransform(String* text,
UChar previous_character) const {
switch (TextTransform()) {
case ETextTransform::kNone:
return;
case ETextTransform::kCapitalize:
*text = Capitalize(*text, previous_character);
return;
case ETextTransform::kUppercase:
*text = text->UpperUnicode(Locale());
return;
case ETextTransform::kLowercase:
*text = text->LowerUnicode(Locale());
return;
}
NOTREACHED();
}
const AtomicString& ComputedStyle::TextEmphasisMarkString() const {
switch (GetTextEmphasisMark()) {
case TextEmphasisMark::kNone:
return g_null_atom;
case TextEmphasisMark::kCustom:
return TextEmphasisCustomMark();
case TextEmphasisMark::kDot: {
DEFINE_STATIC_LOCAL(AtomicString, filled_dot_string,
(&kBulletCharacter, 1));
DEFINE_STATIC_LOCAL(AtomicString, open_dot_string,
(&kWhiteBulletCharacter, 1));
return GetTextEmphasisFill() == TextEmphasisFill::kFilled
? filled_dot_string
: open_dot_string;
}
case TextEmphasisMark::kCircle: {
DEFINE_STATIC_LOCAL(AtomicString, filled_circle_string,
(&kBlackCircleCharacter, 1));
DEFINE_STATIC_LOCAL(AtomicString, open_circle_string,
(&kWhiteCircleCharacter, 1));
return GetTextEmphasisFill() == TextEmphasisFill::kFilled
? filled_circle_string
: open_circle_string;
}
case TextEmphasisMark::kDoubleCircle: {
DEFINE_STATIC_LOCAL(AtomicString, filled_double_circle_string,
(&kFisheyeCharacter, 1));
DEFINE_STATIC_LOCAL(AtomicString, open_double_circle_string,
(&kBullseyeCharacter, 1));
return GetTextEmphasisFill() == TextEmphasisFill::kFilled
? filled_double_circle_string
: open_double_circle_string;
}
case TextEmphasisMark::kTriangle: {
DEFINE_STATIC_LOCAL(AtomicString, filled_triangle_string,
(&kBlackUpPointingTriangleCharacter, 1));
DEFINE_STATIC_LOCAL(AtomicString, open_triangle_string,
(&kWhiteUpPointingTriangleCharacter, 1));
return GetTextEmphasisFill() == TextEmphasisFill::kFilled
? filled_triangle_string
: open_triangle_string;
}
case TextEmphasisMark::kSesame: {
DEFINE_STATIC_LOCAL(AtomicString, filled_sesame_string,
(&kSesameDotCharacter, 1));
DEFINE_STATIC_LOCAL(AtomicString, open_sesame_string,
(&kWhiteSesameDotCharacter, 1));
return GetTextEmphasisFill() == TextEmphasisFill::kFilled
? filled_sesame_string
: open_sesame_string;
}
case TextEmphasisMark::kAuto:
NOTREACHED();
return g_null_atom;
}
NOTREACHED();
return g_null_atom;
}
LineLogicalSide ComputedStyle::GetTextEmphasisLineLogicalSide() const {
TextEmphasisPosition position = GetTextEmphasisPosition();
if (IsHorizontalWritingMode()) {
return position == TextEmphasisPosition::kOverRight ||
position == TextEmphasisPosition::kOverLeft
? LineLogicalSide::kOver
: LineLogicalSide::kUnder;
}
if (GetWritingMode() != WritingMode::kSidewaysLr) {
return position == TextEmphasisPosition::kOverRight ||
position == TextEmphasisPosition::kUnderRight
? LineLogicalSide::kOver
: LineLogicalSide::kUnder;
}
return position == TextEmphasisPosition::kOverLeft ||
position == TextEmphasisPosition::kUnderLeft
? LineLogicalSide::kOver
: LineLogicalSide::kUnder;
}
CSSAnimationData& ComputedStyle::AccessAnimations() {
if (!AnimationsInternal())
SetAnimationsInternal(CSSAnimationData::Create());
return *AnimationsInternal();
}
CSSTransitionData& ComputedStyle::AccessTransitions() {
if (!TransitionsInternal())
SetTransitionsInternal(CSSTransitionData::Create());
return *TransitionsInternal();
}
const Font& ComputedStyle::GetFont() const {
return FontInternal();
}
const FontDescription& ComputedStyle::GetFontDescription() const {
return FontInternal().GetFontDescription();
}
float ComputedStyle::SpecifiedFontSize() const {
return GetFontDescription().SpecifiedSize();
}
float ComputedStyle::ComputedFontSize() const {
return GetFontDescription().ComputedSize();
}
LayoutUnit ComputedStyle::ComputedFontSizeAsFixed() const {
return LayoutUnit::FromFloatRound(GetFontDescription().ComputedSize());
}
int ComputedStyle::FontSize() const {
return GetFontDescription().ComputedPixelSize();
}
float ComputedStyle::FontSizeAdjust() const {
return GetFontDescription().SizeAdjust();
}
bool ComputedStyle::HasFontSizeAdjust() const {
return GetFontDescription().HasSizeAdjust();
}
FontSelectionValue ComputedStyle::GetFontWeight() const {
return GetFontDescription().Weight();
}
FontSelectionValue ComputedStyle::GetFontStretch() const {
return GetFontDescription().Stretch();
}
FontBaseline ComputedStyle::GetFontBaseline() const {
// TODO(kojii): Incorporate 'dominant-baseline' when we support it.
// https://www.w3.org/TR/css-inline-3/#dominant-baseline-property
// Vertical flow (except 'text-orientation: sideways') uses ideographic
// baseline. https://drafts.csswg.org/css-writing-modes-3/#intro-baselines
return !GetFontDescription().IsVerticalAnyUpright() ? kAlphabeticBaseline
: kIdeographicBaseline;
}
TextDecoration ComputedStyle::TextDecorationsInEffect() const {
if (HasSimpleUnderlineInternal())
return TextDecoration::kUnderline;
if (!AppliedTextDecorationsInternal())
return TextDecoration::kNone;
TextDecoration decorations = TextDecoration::kNone;
const Vector<AppliedTextDecoration>& applied = AppliedTextDecorations();
for (size_t i = 0; i < applied.size(); ++i)
decorations |= applied[i].Lines();
return decorations;
}
const Vector<AppliedTextDecoration>& ComputedStyle::AppliedTextDecorations()
const {
if (HasSimpleUnderlineInternal()) {
DEFINE_STATIC_LOCAL(
Vector<AppliedTextDecoration>, underline,
(1, AppliedTextDecoration(
TextDecoration::kUnderline, ETextDecorationStyle::kSolid,
VisitedDependentColor(GetCSSPropertyTextDecorationColor()))));
// Since we only have one of these in memory, just update the color before
// returning.
underline.at(0).SetColor(
VisitedDependentColor(GetCSSPropertyTextDecorationColor()));
return underline;
}
if (!AppliedTextDecorationsInternal()) {
DEFINE_STATIC_LOCAL(Vector<AppliedTextDecoration>, empty, ());
return empty;
}
return AppliedTextDecorationsInternal()->GetVector();
}
StyleInheritedVariables* ComputedStyle::InheritedVariables() const {
return InheritedVariablesInternal().get();
}
StyleNonInheritedVariables* ComputedStyle::NonInheritedVariables() const {
return NonInheritedVariablesInternal().get();
}
StyleInheritedVariables& ComputedStyle::MutableInheritedVariables() {
scoped_refptr<StyleInheritedVariables>& variables =
MutableInheritedVariablesInternal();
if (!variables)
variables = StyleInheritedVariables::Create();
else if (!variables->HasOneRef())
variables = variables->Copy();
return *variables;
}
StyleNonInheritedVariables& ComputedStyle::MutableNonInheritedVariables() {
std::unique_ptr<StyleNonInheritedVariables>& variables =
MutableNonInheritedVariablesInternal();
if (!variables)
variables = StyleNonInheritedVariables::Create();
return *variables;
}
void ComputedStyle::SetUnresolvedInheritedVariable(
const AtomicString& name,
scoped_refptr<CSSVariableData> value) {
DCHECK(value && value->NeedsVariableResolution());
MutableInheritedVariables().SetVariable(name, std::move(value));
}
void ComputedStyle::SetUnresolvedNonInheritedVariable(
const AtomicString& name,
scoped_refptr<CSSVariableData> value) {
DCHECK(value && value->NeedsVariableResolution());
MutableNonInheritedVariables().SetVariable(name, std::move(value));
}
void ComputedStyle::SetResolvedUnregisteredVariable(
const AtomicString& name,
scoped_refptr<CSSVariableData> value) {
DCHECK(value && !value->NeedsVariableResolution());
MutableInheritedVariables().SetVariable(name, std::move(value));
}
void ComputedStyle::SetResolvedInheritedVariable(
const AtomicString& name,
scoped_refptr<CSSVariableData> value,
const CSSValue* parsed_value) {
DCHECK(!!value == !!parsed_value);
DCHECK(!(value && value->NeedsVariableResolution()));
StyleInheritedVariables& variables = MutableInheritedVariables();
variables.SetVariable(name, std::move(value));
variables.SetRegisteredVariable(name, parsed_value);
}
void ComputedStyle::SetResolvedNonInheritedVariable(
const AtomicString& name,
scoped_refptr<CSSVariableData> value,
const CSSValue* parsed_value) {
DCHECK(!!value == !!parsed_value);
DCHECK(!(value && value->NeedsVariableResolution()));
StyleNonInheritedVariables& variables = MutableNonInheritedVariables();
variables.SetVariable(name, std::move(value));
variables.SetRegisteredVariable(name, parsed_value);
}
void ComputedStyle::RemoveVariable(const AtomicString& name,
bool is_inherited_property) {
if (is_inherited_property) {
MutableInheritedVariables().RemoveVariable(name);
} else {
MutableNonInheritedVariables().RemoveVariable(name);
}
}
CSSVariableData* ComputedStyle::GetVariable(const AtomicString& name) const {
CSSVariableData* variable = GetVariable(name, true);
if (variable) {
return variable;
}
return GetVariable(name, false);
}
CSSVariableData* ComputedStyle::GetVariable(const AtomicString& name,
bool is_inherited_property) const {
if (is_inherited_property) {
return InheritedVariables() ? InheritedVariables()->GetVariable(name)
: nullptr;
}
return NonInheritedVariables() ? NonInheritedVariables()->GetVariable(name)
: nullptr;
}
const CSSValue* ComputedStyle::GetRegisteredVariable(
const AtomicString& name,
bool is_inherited_property) const {
if (is_inherited_property) {
return InheritedVariables() ? InheritedVariables()->RegisteredVariable(name)
: nullptr;
}
return NonInheritedVariables()
? NonInheritedVariables()->RegisteredVariable(name)
: nullptr;
}
const CSSValue* ComputedStyle::GetRegisteredVariable(
const AtomicString& name) const {
// Registered custom properties are by default non-inheriting so check there
// first.
const CSSValue* result = GetRegisteredVariable(name, false);
if (result) {
return result;
}
return GetRegisteredVariable(name, true);
}
float ComputedStyle::WordSpacing() const {
return GetFontDescription().WordSpacing();
}
float ComputedStyle::LetterSpacing() const {
return GetFontDescription().LetterSpacing();
}
bool ComputedStyle::SetFontDescription(const FontDescription& v) {
if (FontInternal().GetFontDescription() != v) {
SetFontInternal(Font(v));
return true;
}
return false;
}
void ComputedStyle::SetFont(const Font& font) {
SetFontInternal(font);
}
bool ComputedStyle::HasIdenticalAscentDescentAndLineGap(
const ComputedStyle& other) const {
const SimpleFontData* font_data = GetFont().PrimaryFont();
const SimpleFontData* other_font_data = other.GetFont().PrimaryFont();
return font_data && other_font_data &&
font_data->GetFontMetrics().HasIdenticalAscentDescentAndLineGap(
other_font_data->GetFontMetrics());
}
const Length& ComputedStyle::SpecifiedLineHeight() const {
return LineHeightInternal();
}
Length ComputedStyle::LineHeight() const {
const Length& lh = LineHeightInternal();
// Unlike getFontDescription().computedSize() and hence fontSize(), this is
// recalculated on demand as we only store the specified line height.
// FIXME: Should consider scaling the fixed part of any calc expressions
// too, though this involves messily poking into CalcExpressionLength.
if (lh.IsFixed()) {
float multiplier = TextAutosizingMultiplier();
return Length(
TextAutosizer::ComputeAutosizedFontSize(lh.Value(), multiplier),
kFixed);
}
return lh;
}
int ComputedStyle::ComputedLineHeight() const {
const Length& lh = LineHeight();
// Negative value means the line height is not set. Use the font's built-in
// spacing, if avalible.
if (lh.IsNegative() && GetFont().PrimaryFont())
return GetFont().PrimaryFont()->GetFontMetrics().LineSpacing();
if (lh.IsPercentOrCalc())
return MinimumValueForLength(lh, LayoutUnit(ComputedFontSize())).ToInt();
return std::min(lh.Value(), LayoutUnit::Max().ToFloat());
}
LayoutUnit ComputedStyle::ComputedLineHeightAsFixed() const {
const Length& lh = LineHeight();
// Negative value means the line height is not set. Use the font's built-in
// spacing, if avalible.
if (lh.IsNegative() && GetFont().PrimaryFont())
return GetFont().PrimaryFont()->GetFontMetrics().FixedLineSpacing();
if (lh.IsPercentOrCalc()) {
return LayoutUnit(
MinimumValueForLength(lh, ComputedFontSizeAsFixed()).ToInt());
}
return LayoutUnit(floorf(lh.Value()));
}
void ComputedStyle::SetWordSpacing(float word_spacing) {
FontSelector* current_font_selector = GetFont().GetFontSelector();
FontDescription desc(GetFontDescription());
desc.SetWordSpacing(word_spacing);
SetFontDescription(desc);
GetFont().Update(current_font_selector);
}
void ComputedStyle::SetLetterSpacing(float letter_spacing) {
FontSelector* current_font_selector = GetFont().GetFontSelector();
FontDescription desc(GetFontDescription());
desc.SetLetterSpacing(letter_spacing);
SetFontDescription(desc);
GetFont().Update(current_font_selector);
}
void ComputedStyle::SetTextAutosizingMultiplier(float multiplier) {
SetTextAutosizingMultiplierInternal(multiplier);
float size = SpecifiedFontSize();
DCHECK(std::isfinite(size));
if (!std::isfinite(size) || size < 0)
size = 0;
else
size = std::min(kMaximumAllowedFontSize, size);
FontSelector* current_font_selector = GetFont().GetFontSelector();
FontDescription desc(GetFontDescription());
desc.SetSpecifiedSize(size);
desc.SetComputedSize(size);
float autosized_font_size =
TextAutosizer::ComputeAutosizedFontSize(size, multiplier);
float computed_size = autosized_font_size * EffectiveZoom();
desc.SetComputedSize(std::min(kMaximumAllowedFontSize, computed_size));
SetFontDescription(desc);
GetFont().Update(current_font_selector);
}
void ComputedStyle::AddAppliedTextDecoration(
const AppliedTextDecoration& decoration) {
scoped_refptr<AppliedTextDecorationList>& list =
MutableAppliedTextDecorationsInternal();
if (!list)
list = AppliedTextDecorationList::Create();
else if (!list->HasOneRef())
list = list->Copy();
list->push_back(decoration);
}
void ComputedStyle::OverrideTextDecorationColors(Color override_color) {
scoped_refptr<AppliedTextDecorationList>& list =
MutableAppliedTextDecorationsInternal();
DCHECK(list);
if (!list->HasOneRef())
list = list->Copy();
for (size_t i = 0; i < list->size(); ++i)
list->at(i).SetColor(override_color);
}
void ComputedStyle::ApplyTextDecorations(
const Color& parent_text_decoration_color,
bool override_existing_colors) {
if (GetTextDecoration() == TextDecoration::kNone &&
!HasSimpleUnderlineInternal() && !AppliedTextDecorationsInternal())
return;
// If there are any color changes or decorations set by this element, stop
// using m_hasSimpleUnderline.
Color current_text_decoration_color =
VisitedDependentColor(GetCSSPropertyTextDecorationColor());
if (HasSimpleUnderlineInternal() &&
(GetTextDecoration() != TextDecoration::kNone ||
current_text_decoration_color != parent_text_decoration_color)) {
SetHasSimpleUnderlineInternal(false);
AddAppliedTextDecoration(AppliedTextDecoration(
TextDecoration::kUnderline, ETextDecorationStyle::kSolid,
parent_text_decoration_color));
}
if (override_existing_colors && AppliedTextDecorationsInternal())
OverrideTextDecorationColors(current_text_decoration_color);
if (GetTextDecoration() == TextDecoration::kNone)
return;
DCHECK(!HasSimpleUnderlineInternal());
// To save memory, we don't use AppliedTextDecoration objects in the common
// case of a single simple underline of currentColor.
TextDecoration decoration_lines = GetTextDecoration();
ETextDecorationStyle decoration_style = TextDecorationStyle();
bool is_simple_underline = decoration_lines == TextDecoration::kUnderline &&
decoration_style == ETextDecorationStyle::kSolid &&
TextDecorationColor().IsCurrentColor();
if (is_simple_underline && !AppliedTextDecorationsInternal()) {
SetHasSimpleUnderlineInternal(true);
return;
}
AddAppliedTextDecoration(AppliedTextDecoration(
decoration_lines, decoration_style, current_text_decoration_color));
}
void ComputedStyle::ClearAppliedTextDecorations() {
SetHasSimpleUnderlineInternal(false);
if (AppliedTextDecorationsInternal())
SetAppliedTextDecorationsInternal(nullptr);
}
void ComputedStyle::RestoreParentTextDecorations(
const ComputedStyle& parent_style) {
SetHasSimpleUnderlineInternal(parent_style.HasSimpleUnderlineInternal());
if (AppliedTextDecorationsInternal() !=
parent_style.AppliedTextDecorationsInternal()) {
SetAppliedTextDecorationsInternal(scoped_refptr<AppliedTextDecorationList>(
parent_style.AppliedTextDecorationsInternal()));
}
}
void ComputedStyle::ClearMultiCol() {
SetColumnGap(ComputedStyleInitialValues::InitialColumnGap());
SetColumnWidthInternal(ComputedStyleInitialValues::InitialColumnWidth());
SetColumnRuleStyle(ComputedStyleInitialValues::InitialColumnRuleStyle());
SetColumnRuleWidthInternal(
LayoutUnit(ComputedStyleInitialValues::InitialColumnRuleWidth()));
SetColumnRuleColorInternal(
ComputedStyleInitialValues::InitialColumnRuleColor());
SetColumnRuleColorIsCurrentColor(
ComputedStyleInitialValues::InitialColumnRuleColorIsCurrentColor());
SetVisitedLinkColumnRuleColorInternal(
ComputedStyleInitialValues::InitialVisitedLinkColumnRuleColor());
SetColumnCountInternal(ComputedStyleInitialValues::InitialColumnCount());
SetHasAutoColumnCountInternal(
ComputedStyleInitialValues::InitialHasAutoColumnCount());
SetHasAutoColumnWidthInternal(
ComputedStyleInitialValues::InitialHasAutoColumnWidth());
ResetColumnFill();
ResetColumnSpan();
}
StyleColor ComputedStyle::DecorationColorIncludingFallback(
bool visited_link) const {
StyleColor style_color =
visited_link ? VisitedLinkTextDecorationColor() : TextDecorationColor();
if (!style_color.IsCurrentColor())
return style_color;
if (TextStrokeWidth()) {
// Prefer stroke color if possible, but not if it's fully transparent.
StyleColor text_stroke_style_color =
visited_link ? VisitedLinkTextStrokeColor() : TextStrokeColor();
if (!text_stroke_style_color.IsCurrentColor() &&
text_stroke_style_color.GetColor().Alpha())
return text_stroke_style_color;
}
return visited_link ? VisitedLinkTextFillColor() : TextFillColor();
}
Color ComputedStyle::VisitedDependentColor(
const CSSProperty& color_property) const {
Color unvisited_color =
ToLonghand(color_property).ColorIncludingFallback(false, *this);
if (InsideLink() != EInsideLink::kInsideVisitedLink)
return unvisited_color;
Color visited_color =
ToLonghand(color_property).ColorIncludingFallback(true, *this);
// Take the alpha from the unvisited color, but get the RGB values from the
// visited color.
return Color(visited_color.Red(), visited_color.Green(), visited_color.Blue(),
unvisited_color.Alpha());
}
void ComputedStyle::SetMarginStart(const Length& margin) {
if (IsHorizontalWritingMode()) {
if (IsLeftToRightDirection())
SetMarginLeft(margin);
else
SetMarginRight(margin);
} else {
if (IsLeftToRightDirection())
SetMarginTop(margin);
else
SetMarginBottom(margin);
}
}
void ComputedStyle::SetMarginEnd(const Length& margin) {
if (IsHorizontalWritingMode()) {
if (IsLeftToRightDirection())
SetMarginRight(margin);
else
SetMarginLeft(margin);
} else {
if (IsLeftToRightDirection())
SetMarginBottom(margin);
else
SetMarginTop(margin);
}
}
int ComputedStyle::OutlineOutsetExtent() const {
if (!HasOutline())
return 0;
if (OutlineStyleIsAuto()) {
return GraphicsContext::FocusRingOutsetExtent(
OutlineOffset(), std::ceil(GetOutlineStrokeWidthForFocusRing()));
}
return ClampAdd(OutlineWidth(), OutlineOffset()).Max(0);
}
float ComputedStyle::GetOutlineStrokeWidthForFocusRing() const {
#if defined(OS_MACOSX)
return OutlineWidth();
#else
// Draw an outline with thickness in proportion to the zoom level, but never
// less than 1 pixel so that it remains visible.
return std::max(EffectiveZoom(), 1.f);
#endif
}
bool ComputedStyle::ColumnRuleEquivalent(
const ComputedStyle& other_style) const {
return ColumnRuleStyle() == other_style.ColumnRuleStyle() &&
ColumnRuleWidth() == other_style.ColumnRuleWidth() &&
VisitedDependentColor(GetCSSPropertyColumnRuleColor()) ==
other_style.VisitedDependentColor(GetCSSPropertyColumnRuleColor());
}
TextEmphasisMark ComputedStyle::GetTextEmphasisMark() const {
TextEmphasisMark mark = TextEmphasisMarkInternal();
if (mark != TextEmphasisMark::kAuto)
return mark;
if (IsHorizontalWritingMode())
return TextEmphasisMark::kDot;
return TextEmphasisMark::kSesame;
}
LayoutRectOutsets ComputedStyle::ImageOutsets(
const NinePieceImage& image) const {
return LayoutRectOutsets(
NinePieceImage::ComputeOutset(image.Outset().Top(), BorderTopWidth()),
NinePieceImage::ComputeOutset(image.Outset().Right(), BorderRightWidth()),
NinePieceImage::ComputeOutset(image.Outset().Bottom(),
BorderBottomWidth()),
NinePieceImage::ComputeOutset(image.Outset().Left(), BorderLeftWidth()));
}
void ComputedStyle::SetBorderImageSource(StyleImage* image) {
if (BorderImage().GetImage() == image)
return;
MutableBorderImageInternal().SetImage(image);
}
void ComputedStyle::SetBorderImageSlices(const LengthBox& slices) {
if (BorderImage().ImageSlices() == slices)
return;
MutableBorderImageInternal().SetImageSlices(slices);
}
void ComputedStyle::SetBorderImageSlicesFill(bool fill) {
if (BorderImage().Fill() == fill)
return;
MutableBorderImageInternal().SetFill(fill);
}
void ComputedStyle::SetBorderImageWidth(const BorderImageLengthBox& slices) {
if (BorderImage().BorderSlices() == slices)
return;
MutableBorderImageInternal().SetBorderSlices(slices);
}
void ComputedStyle::SetBorderImageOutset(const BorderImageLengthBox& outset) {
if (BorderImage().Outset() == outset)
return;
MutableBorderImageInternal().SetOutset(outset);
}
bool ComputedStyle::BorderObscuresBackground() const {
if (!HasBorder())
return false;
// Bail if we have any border-image for now. We could look at the image alpha
// to improve this.
if (BorderImage().GetImage())
return false;
BorderEdge edges[4];
GetBorderEdgeInfo(edges);
for (unsigned int i = static_cast<unsigned>(BoxSide::kTop);
i <= static_cast<unsigned>(BoxSide::kLeft); ++i) {
const BorderEdge& curr_edge = edges[i];
if (!curr_edge.ObscuresBackground())
return false;
}
return true;
}
LayoutRectOutsets ComputedStyle::BoxDecorationOutsets() const {
DCHECK(HasVisualOverflowingEffect());
LayoutRectOutsets outsets;
if (const ShadowList* box_shadow = BoxShadow())
outsets = LayoutRectOutsets(box_shadow->RectOutsetsIncludingOriginal());
if (HasBorderImageOutsets())
outsets.Unite(BorderImageOutsets());
if (HasMaskBoxImageOutsets())
outsets.Unite(MaskBoxImageOutsets());
return outsets;
}
void ComputedStyle::GetBorderEdgeInfo(BorderEdge edges[],
bool include_logical_left_edge,
bool include_logical_right_edge) const {
bool horizontal = IsHorizontalWritingMode();
edges[static_cast<unsigned>(BoxSide::kTop)] = BorderEdge(
BorderTopWidth(), VisitedDependentColor(GetCSSPropertyBorderTopColor()),
BorderTopStyle(), horizontal || include_logical_left_edge);
edges[static_cast<unsigned>(BoxSide::kRight)] =
BorderEdge(BorderRightWidth(),
VisitedDependentColor(GetCSSPropertyBorderRightColor()),
BorderRightStyle(), !horizontal || include_logical_right_edge);
edges[static_cast<unsigned>(BoxSide::kBottom)] =
BorderEdge(BorderBottomWidth(),
VisitedDependentColor(GetCSSPropertyBorderBottomColor()),
BorderBottomStyle(), horizontal || include_logical_right_edge);
edges[static_cast<unsigned>(BoxSide::kLeft)] = BorderEdge(
BorderLeftWidth(), VisitedDependentColor(GetCSSPropertyBorderLeftColor()),
BorderLeftStyle(), !horizontal || include_logical_left_edge);
}
void ComputedStyle::CopyChildDependentFlagsFrom(const ComputedStyle& other) {
if (other.HasExplicitlyInheritedProperties())
SetHasExplicitlyInheritedProperties();
}
bool ComputedStyle::ShadowListHasCurrentColor(const ShadowList* shadow_list) {
if (!shadow_list)
return false;
for (size_t i = shadow_list->Shadows().size(); i--;) {
if (shadow_list->Shadows()[i].GetColor().IsCurrentColor())
return true;
}
return false;
}
STATIC_ASSERT_ENUM(cc::OverscrollBehavior::kOverscrollBehaviorTypeAuto,
EOverscrollBehavior::kAuto);
STATIC_ASSERT_ENUM(cc::OverscrollBehavior::kOverscrollBehaviorTypeContain,
EOverscrollBehavior::kContain);
STATIC_ASSERT_ENUM(cc::OverscrollBehavior::kOverscrollBehaviorTypeNone,
EOverscrollBehavior::kNone);
} // namespace blink