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dart / external / github.com / flutter / engine / refs/tags/demo_apk_24 / . / sky / engine / core / rendering / style / RenderStyle.cpp
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/*
* 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 "sky/engine/core/rendering/style/RenderStyle.h"
#include <algorithm>
#include "gen/sky/platform/RuntimeEnabledFeatures.h"
#include "sky/engine/core/css/resolver/StyleResolver.h"
#include "sky/engine/core/rendering/RenderTheme.h"
#include "sky/engine/core/rendering/style/AppliedTextDecoration.h"
#include "sky/engine/core/rendering/style/DataEquivalency.h"
#include "sky/engine/core/rendering/style/ShadowList.h"
#include "sky/engine/core/rendering/style/StyleImage.h"
#include "sky/engine/core/rendering/style/StyleInheritedData.h"
#include "sky/engine/platform/LengthFunctions.h"
#include "sky/engine/platform/fonts/Font.h"
#include "sky/engine/platform/fonts/FontSelector.h"
#include "sky/engine/platform/geometry/FloatRoundedRect.h"
#include "sky/engine/wtf/MathExtras.h"
namespace blink {
struct SameSizeAsBorderValue {
RGBA32 m_color;
unsigned m_width;
};
COMPILE_ASSERT(sizeof(BorderValue) == sizeof(SameSizeAsBorderValue), BorderValue_should_not_grow);
inline RenderStyle* defaultStyle()
{
DEFINE_STATIC_REF(RenderStyle, s_defaultStyle, (RenderStyle::createDefaultStyle()));
return s_defaultStyle;
}
PassRefPtr<RenderStyle> RenderStyle::create()
{
return adoptRef(new RenderStyle());
}
PassRefPtr<RenderStyle> RenderStyle::createDefaultStyle()
{
return adoptRef(new RenderStyle(DefaultStyle));
}
PassRefPtr<RenderStyle> RenderStyle::clone(const RenderStyle* other)
{
return adoptRef(new RenderStyle(*other));
}
ALWAYS_INLINE RenderStyle::RenderStyle()
: m_box(defaultStyle()->m_box)
, visual(defaultStyle()->visual)
, m_background(defaultStyle()->m_background)
, surround(defaultStyle()->surround)
, rareNonInheritedData(defaultStyle()->rareNonInheritedData)
, rareInheritedData(defaultStyle()->rareInheritedData)
, inherited(defaultStyle()->inherited)
{
setBitDefaults(); // Would it be faster to copy this from the default style?
COMPILE_ASSERT((sizeof(InheritedFlags) <= 8), InheritedFlags_does_not_grow);
COMPILE_ASSERT((sizeof(NonInheritedFlags) <= 8), NonInheritedFlags_does_not_grow);
}
ALWAYS_INLINE RenderStyle::RenderStyle(DefaultStyleTag)
{
setBitDefaults();
m_box.init();
visual.init();
m_background.init();
surround.init();
rareNonInheritedData.init();
rareNonInheritedData.access()->m_flexibleBox.init();
rareNonInheritedData.access()->m_transform.init();
rareNonInheritedData.access()->m_filter.init();
rareInheritedData.init();
inherited.init();
}
ALWAYS_INLINE RenderStyle::RenderStyle(const RenderStyle& o)
: RefCounted<RenderStyle>()
, m_box(o.m_box)
, visual(o.visual)
, m_background(o.m_background)
, surround(o.surround)
, rareNonInheritedData(o.rareNonInheritedData)
, rareInheritedData(o.rareInheritedData)
, inherited(o.inherited)
, inherited_flags(o.inherited_flags)
, noninherited_flags(o.noninherited_flags)
{
}
StyleRecalcChange RenderStyle::stylePropagationDiff(const RenderStyle* oldStyle, const RenderStyle* newStyle)
{
if ((!oldStyle && newStyle) || (oldStyle && !newStyle))
return Reattach;
if (!oldStyle && !newStyle)
return NoChange;
if (oldStyle->display() != newStyle->display()
|| oldStyle->justifyItems() != newStyle->justifyItems()
|| oldStyle->alignItems() != newStyle->alignItems())
return Reattach;
if (*oldStyle == *newStyle)
return NoChange;
if (oldStyle->inheritedNotEqual(newStyle)
|| oldStyle->hasExplicitlyInheritedProperties()
|| newStyle->hasExplicitlyInheritedProperties())
return Inherit;
return NoInherit;
}
void RenderStyle::inheritFrom(const RenderStyle* inheritParent)
{
rareInheritedData = inheritParent->rareInheritedData;
inherited = inheritParent->inherited;
inherited_flags = inheritParent->inherited_flags;
}
void RenderStyle::copyNonInheritedFrom(const RenderStyle* other)
{
m_box = other->m_box;
visual = other->visual;
m_background = other->m_background;
surround = other->surround;
rareNonInheritedData = other->rareNonInheritedData;
// The flags are copied one-by-one because noninherited_flags contains a bunch of stuff other than real style data.
noninherited_flags.effectiveDisplay = other->noninherited_flags.effectiveDisplay;
noninherited_flags.originalDisplay = other->noninherited_flags.originalDisplay;
noninherited_flags.overflowX = other->noninherited_flags.overflowX;
noninherited_flags.overflowY = other->noninherited_flags.overflowY;
noninherited_flags.verticalAlign = other->noninherited_flags.verticalAlign;
noninherited_flags.position = other->noninherited_flags.position;
noninherited_flags.unicodeBidi = other->noninherited_flags.unicodeBidi;
noninherited_flags.explicitInheritance = other->noninherited_flags.explicitInheritance;
noninherited_flags.currentColor = other->noninherited_flags.currentColor;
noninherited_flags.hasViewportUnits = other->noninherited_flags.hasViewportUnits;
}
bool RenderStyle::operator==(const RenderStyle& o) const
{
// compare everything except the pseudoStyle pointer
return inherited_flags == o.inherited_flags
&& noninherited_flags == o.noninherited_flags
&& m_box == o.m_box
&& visual == o.visual
&& m_background == o.m_background
&& surround == o.surround
&& rareNonInheritedData == o.rareNonInheritedData
&& rareInheritedData == o.rareInheritedData
&& inherited == o.inherited;
}
bool RenderStyle::inheritedNotEqual(const RenderStyle* other) const
{
return inherited_flags != other->inherited_flags
|| inherited != other->inherited
|| rareInheritedData != other->rareInheritedData;
}
bool RenderStyle::inheritedDataShared(const RenderStyle* other) const
{
// This is a fast check that only looks if the data structures are shared.
return inherited_flags == other->inherited_flags
&& inherited.get() == other->inherited.get()
&& rareInheritedData.get() == other->rareInheritedData.get();
}
bool RenderStyle::requiresOnlyBlockChildren() const
{
switch (display()) {
case PARAGRAPH:
case INLINE:
return false;
case FLEX:
case INLINE_FLEX:
return true;
case NONE:
ASSERT_NOT_REACHED();
return false;
}
ASSERT_NOT_REACHED();
return false;
}
static bool positionedObjectMovedOnly(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 and changed then this
// is not just a movement - we need to resize to our container.
if (width.isIntrinsicOrAuto()
&& ((!a.left().isIntrinsicOrAuto() && a.left() != b.left())
|| (!a.right().isIntrinsicOrAuto() && a.right() != b.right())))
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;
}
StyleDifference RenderStyle::visualInvalidationDiff(const RenderStyle& 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 (diffNeedsFullLayout(other)) {
diff.setNeedsFullLayout();
} else if (position() != StaticPosition && surround->offset != other.surround->offset) {
// Optimize for the case where a positioned layer is moving but not changing size.
if (positionedObjectMovedOnly(surround->offset, other.surround->offset, m_box->width()))
diff.setNeedsPositionedMovementLayout();
else
diff.setNeedsFullLayout();
}
updatePropertySpecificDifferences(other, diff);
// 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.
return diff;
}
bool RenderStyle::diffNeedsFullLayout(const RenderStyle& 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 renderer knows how to exactly invalidate paints caused by the layout change
// instead of forced full paint invalidation.
if (surround.get() != other.surround.get()) {
// If our border widths change, then we need to layout. Other changes to borders only necessitate a paint invalidation.
if (borderLeftWidth() != other.borderLeftWidth()
|| borderTopWidth() != other.borderTopWidth()
|| borderBottomWidth() != other.borderBottomWidth()
|| borderRightWidth() != other.borderRightWidth())
return true;
}
if (rareNonInheritedData.get() != other.rareNonInheritedData.get()) {
if (rareNonInheritedData->textOverflow != other.rareNonInheritedData->textOverflow
|| rareNonInheritedData->m_wrapFlow != other.rareNonInheritedData->m_wrapFlow
|| rareNonInheritedData->m_wrapThrough != other.rareNonInheritedData->m_wrapThrough
|| rareNonInheritedData->m_order != other.rareNonInheritedData->m_order
|| rareNonInheritedData->m_alignContent != other.rareNonInheritedData->m_alignContent
|| rareNonInheritedData->m_alignItems != other.rareNonInheritedData->m_alignItems
|| rareNonInheritedData->m_alignSelf != other.rareNonInheritedData->m_alignSelf
|| rareNonInheritedData->m_justifyContent != other.rareNonInheritedData->m_justifyContent
|| rareNonInheritedData->hasFilters() != other.rareNonInheritedData->hasFilters())
return true;
if (rareNonInheritedData->m_flexibleBox.get() != other.rareNonInheritedData->m_flexibleBox.get()
&& *rareNonInheritedData->m_flexibleBox.get() != *other.rareNonInheritedData->m_flexibleBox.get())
return true;
// FIXME: We should add an optimized form of layout that just recomputes visual overflow.
if (!rareNonInheritedData->shadowDataEquivalent(*other.rareNonInheritedData.get()))
return true;
// If the counter directives change, trigger a relayout to re-calculate counter values and rebuild the counter node tree.
const CounterDirectiveMap* mapA = rareNonInheritedData->m_counterDirectives.get();
const CounterDirectiveMap* mapB = other.rareNonInheritedData->m_counterDirectives.get();
if (!(mapA == mapB || (mapA && mapB && *mapA == *mapB)))
return true;
// We only need do layout for opacity changes if adding or losing opacity could trigger a change
// in us being a stacking context.
if (hasAutoZIndex() != other.hasAutoZIndex() && rareNonInheritedData->hasOpacity() != other.rareNonInheritedData->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 (rareInheritedData.get() != other.rareInheritedData.get()) {
if (rareInheritedData->highlight != other.rareInheritedData->highlight
|| rareInheritedData->indent != other.rareInheritedData->indent
|| rareInheritedData->m_textAlignLast != other.rareInheritedData->m_textAlignLast
|| rareInheritedData->m_textIndentLine != other.rareInheritedData->m_textIndentLine
|| rareInheritedData->wordBreak != other.rareInheritedData->wordBreak
|| rareInheritedData->overflowWrap != other.rareInheritedData->overflowWrap
|| rareInheritedData->lineBreak != other.rareInheritedData->lineBreak
|| rareInheritedData->hyphens != other.rareInheritedData->hyphens
|| rareInheritedData->hyphenationLimitBefore != other.rareInheritedData->hyphenationLimitBefore
|| rareInheritedData->hyphenationLimitAfter != other.rareInheritedData->hyphenationLimitAfter
|| rareInheritedData->hyphenationString != other.rareInheritedData->hyphenationString
|| rareInheritedData->locale != other.rareInheritedData->locale
|| rareInheritedData->textEmphasisMark != other.rareInheritedData->textEmphasisMark
|| rareInheritedData->textEmphasisPosition != other.rareInheritedData->textEmphasisPosition
|| rareInheritedData->textEmphasisCustomMark != other.rareInheritedData->textEmphasisCustomMark
|| rareInheritedData->m_textJustify != other.rareInheritedData->m_textJustify
|| rareInheritedData->m_textOrientation != other.rareInheritedData->m_textOrientation
|| rareInheritedData->m_tabSize != other.rareInheritedData->m_tabSize
|| rareInheritedData->m_lineBoxContain != other.rareInheritedData->m_lineBoxContain
|| rareInheritedData->textStrokeWidth != other.rareInheritedData->textStrokeWidth)
return true;
if (!rareInheritedData->shadowDataEquivalent(*other.rareInheritedData.get()))
return true;
}
if (inherited.get() != other.inherited.get()) {
if (inherited->line_height != other.inherited->line_height
|| inherited->font != other.inherited->font
|| inherited->horizontal_border_spacing != other.inherited->horizontal_border_spacing
|| inherited->vertical_border_spacing != other.inherited->vertical_border_spacing)
return true;
}
if (inherited_flags.m_rtlOrdering != other.inherited_flags.m_rtlOrdering
|| inherited_flags._text_align != other.inherited_flags._text_align
|| inherited_flags._direction != other.inherited_flags._direction
|| inherited_flags._white_space != other.inherited_flags._white_space)
return true;
if (noninherited_flags.overflowX != other.noninherited_flags.overflowX
|| noninherited_flags.overflowY != other.noninherited_flags.overflowY
|| noninherited_flags.unicodeBidi != other.noninherited_flags.unicodeBidi
|| noninherited_flags.position != other.noninherited_flags.position
|| noninherited_flags.originalDisplay != other.noninherited_flags.originalDisplay)
return true;
if (!m_background->outline().visuallyEqual(other.m_background->outline())) {
// FIXME: We only really need to recompute the overflow but we don't have an optimized layout for it.
return true;
}
if (m_box.get() != other.m_box.get()) {
if (m_box->width() != other.m_box->width()
|| m_box->minWidth() != other.m_box->minWidth()
|| m_box->maxWidth() != other.m_box->maxWidth()
|| m_box->height() != other.m_box->height()
|| m_box->minHeight() != other.m_box->minHeight()
|| m_box->maxHeight() != other.m_box->maxHeight())
return true;
if (m_box->verticalAlign() != other.m_box->verticalAlign())
return true;
if (m_box->boxSizing() != other.m_box->boxSizing())
return true;
}
if (noninherited_flags.verticalAlign != other.noninherited_flags.verticalAlign)
return true;
if (surround.get() != other.surround.get()) {
if (surround->margin != other.surround->margin)
return true;
if (surround->padding != other.surround->padding)
return true;
}
// Movement of non-static-positioned object is special cased in RenderStyle::visualInvalidationDiff().
return false;
}
void RenderStyle::updatePropertySpecificDifferences(const RenderStyle& other, StyleDifference& diff) const
{
// StyleAdjuster has ensured that zIndex is non-auto only if it's applicable.
if (m_box->zIndex() != other.m_box->zIndex() || m_box->hasAutoZIndex() != other.m_box->hasAutoZIndex())
diff.setZIndexChanged();
if (rareNonInheritedData.get() != other.rareNonInheritedData.get()) {
if (!transformDataEquivalent(other))
diff.setTransformChanged();
if (rareNonInheritedData->opacity != other.rareNonInheritedData->opacity)
diff.setOpacityChanged();
if (rareNonInheritedData->m_filter != other.rareNonInheritedData->m_filter)
diff.setFilterChanged();
}
}
inline bool requireTransformOrigin(const Vector<RefPtr<TransformOperation> >& transformOperations, RenderStyle::ApplyTransformOrigin applyOrigin)
{
// 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 (applyOrigin != RenderStyle::IncludeTransformOrigin)
return false;
unsigned size = transformOperations.size();
for (unsigned i = 0; i < size; ++i) {
TransformOperation::OperationType type = transformOperations[i]->type();
if (type != TransformOperation::TranslateX
&& type != TransformOperation::TranslateY
&& type != TransformOperation::Translate
&& type != TransformOperation::TranslateZ
&& type != TransformOperation::Translate3D)
return true;
}
return false;
}
void RenderStyle::applyTransform(TransformationMatrix& transform, const LayoutSize& borderBoxSize, ApplyTransformOrigin applyOrigin) const
{
applyTransform(transform, FloatRect(FloatPoint(), borderBoxSize), applyOrigin);
}
void RenderStyle::applyTransform(TransformationMatrix& transform, const FloatRect& boundingBox, ApplyTransformOrigin applyOrigin) const
{
const Vector<RefPtr<TransformOperation> >& transformOperations = rareNonInheritedData->m_transform->m_operations.operations();
bool applyTransformOrigin = requireTransformOrigin(transformOperations, applyOrigin);
float offsetX = transformOriginX().type() == Percent ? boundingBox.x() : 0;
float offsetY = transformOriginY().type() == Percent ? boundingBox.y() : 0;
if (applyTransformOrigin) {
transform.translate3d(floatValueForLength(transformOriginX(), boundingBox.width()) + offsetX,
floatValueForLength(transformOriginY(), boundingBox.height()) + offsetY,
transformOriginZ());
}
unsigned size = transformOperations.size();
for (unsigned i = 0; i < size; ++i)
transformOperations[i]->apply(transform, boundingBox.size());
if (applyTransformOrigin) {
transform.translate3d(-floatValueForLength(transformOriginX(), boundingBox.width()) - offsetX,
-floatValueForLength(transformOriginY(), boundingBox.height()) - offsetY,
-transformOriginZ());
}
}
void RenderStyle::setTextShadow(PassRefPtr<ShadowList> s)
{
rareInheritedData.access()->textShadow = s;
}
void RenderStyle::setBoxShadow(PassRefPtr<ShadowList> s)
{
rareNonInheritedData.access()->m_boxShadow = s;
}
static RoundedRect::Radii calcRadiiFor(const BorderData& border, IntSize size)
{
return RoundedRect::Radii(
IntSize(valueForLength(border.topLeft().width(), size.width()),
valueForLength(border.topLeft().height(), size.height())),
IntSize(valueForLength(border.topRight().width(), size.width()),
valueForLength(border.topRight().height(), size.height())),
IntSize(valueForLength(border.bottomLeft().width(), size.width()),
valueForLength(border.bottomLeft().height(), size.height())),
IntSize(valueForLength(border.bottomRight().width(), size.width()),
valueForLength(border.bottomRight().height(), size.height())));
}
Color RenderStyle::color() const { return inherited->color; }
void RenderStyle::setColor(const Color& v) { SET_VAR(inherited, color, v); }
short RenderStyle::horizontalBorderSpacing() const { return inherited->horizontal_border_spacing; }
short RenderStyle::verticalBorderSpacing() const { return inherited->vertical_border_spacing; }
void RenderStyle::setHorizontalBorderSpacing(short v) { SET_VAR(inherited, horizontal_border_spacing, v); }
void RenderStyle::setVerticalBorderSpacing(short v) { SET_VAR(inherited, vertical_border_spacing, v); }
RoundedRect RenderStyle::getRoundedBorderFor(const LayoutRect& borderRect, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
{
IntRect snappedBorderRect(pixelSnappedIntRect(borderRect));
RoundedRect roundedRect(snappedBorderRect);
if (hasBorderRadius()) {
RoundedRect::Radii radii = calcRadiiFor(surround->border, snappedBorderRect.size());
radii.scale(calcBorderRadiiConstraintScaleFor(borderRect, radii));
roundedRect.includeLogicalEdges(radii, includeLogicalLeftEdge, includeLogicalRightEdge);
}
return roundedRect;
}
RoundedRect RenderStyle::getRoundedInnerBorderFor(const LayoutRect& borderRect, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
{
int leftWidth = (includeLogicalLeftEdge) ? borderLeftWidth() : 0;
int rightWidth = (includeLogicalRightEdge) ? borderRightWidth() : 0;
int topWidth = borderTopWidth();
int bottomWidth = borderBottomWidth();
return getRoundedInnerBorderFor(borderRect, topWidth, bottomWidth, leftWidth, rightWidth, includeLogicalLeftEdge, includeLogicalRightEdge);
}
RoundedRect RenderStyle::getRoundedInnerBorderFor(const LayoutRect& borderRect,
int topWidth, int bottomWidth, int leftWidth, int rightWidth, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
{
LayoutRect innerRect(borderRect.x() + leftWidth,
borderRect.y() + topWidth,
borderRect.width() - leftWidth - rightWidth,
borderRect.height() - topWidth - bottomWidth);
RoundedRect roundedRect(pixelSnappedIntRect(innerRect));
if (hasBorderRadius()) {
RoundedRect::Radii radii = getRoundedBorderFor(borderRect).radii();
radii.shrink(topWidth, bottomWidth, leftWidth, rightWidth);
roundedRect.includeLogicalEdges(radii, includeLogicalLeftEdge, includeLogicalRightEdge);
}
return roundedRect;
}
static bool allLayersAreFixed(const FillLayer& layer)
{
for (const FillLayer* currLayer = &layer; currLayer; currLayer = currLayer->next()) {
if (!currLayer->image() || currLayer->attachment() != FixedBackgroundAttachment)
return false;
}
return true;
}
bool RenderStyle::hasEntirelyFixedBackground() const
{
return allLayersAreFixed(backgroundLayers());
}
const CounterDirectiveMap* RenderStyle::counterDirectives() const
{
return rareNonInheritedData->m_counterDirectives.get();
}
CounterDirectiveMap& RenderStyle::accessCounterDirectives()
{
OwnPtr<CounterDirectiveMap>& map = rareNonInheritedData.access()->m_counterDirectives;
if (!map)
map = adoptPtr(new CounterDirectiveMap);
return *map;
}
const CounterDirectives RenderStyle::getCounterDirectives(const AtomicString& identifier) const
{
if (const CounterDirectiveMap* directives = counterDirectives())
return directives->get(identifier);
return CounterDirectives();
}
const AtomicString& RenderStyle::hyphenString() const
{
const AtomicString& hyphenationString = rareInheritedData.get()->hyphenationString;
if (!hyphenationString.isNull())
return hyphenationString;
// FIXME: This should depend on locale.
DEFINE_STATIC_LOCAL(AtomicString, hyphenMinusString, (&hyphenMinus, 1));
DEFINE_STATIC_LOCAL(AtomicString, hyphenString, (&hyphen, 1));
return font().primaryFontHasGlyphForCharacter(hyphen) ? hyphenString : hyphenMinusString;
}
const AtomicString& RenderStyle::textEmphasisMarkString() const
{
switch (textEmphasisMark()) {
case TextEmphasisMarkNone:
return nullAtom;
case TextEmphasisMarkCustom:
return textEmphasisCustomMark();
case TextEmphasisMarkDot: {
DEFINE_STATIC_LOCAL(AtomicString, filledDotString, (&bullet, 1));
DEFINE_STATIC_LOCAL(AtomicString, openDotString, (&whiteBullet, 1));
return textEmphasisFill() == TextEmphasisFillFilled ? filledDotString : openDotString;
}
case TextEmphasisMarkCircle: {
DEFINE_STATIC_LOCAL(AtomicString, filledCircleString, (&blackCircle, 1));
DEFINE_STATIC_LOCAL(AtomicString, openCircleString, (&whiteCircle, 1));
return textEmphasisFill() == TextEmphasisFillFilled ? filledCircleString : openCircleString;
}
case TextEmphasisMarkDoubleCircle: {
DEFINE_STATIC_LOCAL(AtomicString, filledDoubleCircleString, (&fisheye, 1));
DEFINE_STATIC_LOCAL(AtomicString, openDoubleCircleString, (&bullseye, 1));
return textEmphasisFill() == TextEmphasisFillFilled ? filledDoubleCircleString : openDoubleCircleString;
}
case TextEmphasisMarkTriangle: {
DEFINE_STATIC_LOCAL(AtomicString, filledTriangleString, (&blackUpPointingTriangle, 1));
DEFINE_STATIC_LOCAL(AtomicString, openTriangleString, (&whiteUpPointingTriangle, 1));
return textEmphasisFill() == TextEmphasisFillFilled ? filledTriangleString : openTriangleString;
}
case TextEmphasisMarkSesame: {
DEFINE_STATIC_LOCAL(AtomicString, filledSesameString, (&sesameDot, 1));
DEFINE_STATIC_LOCAL(AtomicString, openSesameString, (&whiteSesameDot, 1));
return textEmphasisFill() == TextEmphasisFillFilled ? filledSesameString : openSesameString;
}
case TextEmphasisMarkAuto:
ASSERT_NOT_REACHED();
return nullAtom;
}
ASSERT_NOT_REACHED();
return nullAtom;
}
const Font& RenderStyle::font() const { return inherited->font; }
const FontMetrics& RenderStyle::fontMetrics() const { return inherited->font.fontMetrics(); }
const FontDescription& RenderStyle::fontDescription() const { return inherited->font.fontDescription(); }
float RenderStyle::specifiedFontSize() const { return fontDescription().specifiedSize(); }
float RenderStyle::computedFontSize() const { return fontDescription().computedSize(); }
int RenderStyle::fontSize() const { return fontDescription().computedPixelSize(); }
FontWeight RenderStyle::fontWeight() const { return fontDescription().weight(); }
FontStretch RenderStyle::fontStretch() const { return fontDescription().stretch(); }
TextDecoration RenderStyle::textDecorationsInEffect() const
{
int decorations = 0;
const Vector<AppliedTextDecoration>& applied = appliedTextDecorations();
for (size_t i = 0; i < applied.size(); ++i)
decorations |= applied[i].line();
return static_cast<TextDecoration>(decorations);
}
const Vector<AppliedTextDecoration>& RenderStyle::appliedTextDecorations() const
{
if (!inherited_flags.m_textUnderline && !rareInheritedData->appliedTextDecorations) {
DEFINE_STATIC_LOCAL(Vector<AppliedTextDecoration>, empty, ());
return empty;
}
if (inherited_flags.m_textUnderline) {
DEFINE_STATIC_LOCAL(Vector<AppliedTextDecoration>, underline, (1, AppliedTextDecoration(TextDecorationUnderline)));
return underline;
}
return rareInheritedData->appliedTextDecorations->vector();
}
float RenderStyle::wordSpacing() const { return fontDescription().wordSpacing(); }
float RenderStyle::letterSpacing() const { return fontDescription().letterSpacing(); }
bool RenderStyle::setFontDescription(const FontDescription& v)
{
if (inherited->font.fontDescription() != v) {
inherited.access()->font = Font(v);
return true;
}
return false;
}
const Length& RenderStyle::specifiedLineHeight() const { return inherited->line_height; }
Length RenderStyle::lineHeight() const
{
return inherited->line_height;
}
void RenderStyle::setLineHeight(const Length& specifiedLineHeight) { SET_VAR(inherited, line_height, specifiedLineHeight); }
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.isPercent())
return minimumValueForLength(lh, fontSize());
return lh.value();
}
void RenderStyle::setWordSpacing(float wordSpacing)
{
FontSelector* currentFontSelector = font().fontSelector();
FontDescription desc(fontDescription());
desc.setWordSpacing(wordSpacing);
setFontDescription(desc);
font().update(currentFontSelector);
}
void RenderStyle::setLetterSpacing(float letterSpacing)
{
FontSelector* currentFontSelector = font().fontSelector();
FontDescription desc(fontDescription());
desc.setLetterSpacing(letterSpacing);
setFontDescription(desc);
font().update(currentFontSelector);
}
void RenderStyle::setFontSize(float size)
{
ASSERT(std::isfinite(size));
if (!std::isfinite(size) || size < 0)
size = 0;
else
size = std::min(maximumAllowedFontSize, size);
FontSelector* currentFontSelector = font().fontSelector();
FontDescription desc(fontDescription());
desc.setSpecifiedSize(size);
desc.setComputedSize(size);
setFontDescription(desc);
font().update(currentFontSelector);
}
void RenderStyle::setFontWeight(FontWeight weight)
{
FontSelector* currentFontSelector = font().fontSelector();
FontDescription desc(fontDescription());
desc.setWeight(weight);
setFontDescription(desc);
font().update(currentFontSelector);
}
void RenderStyle::addAppliedTextDecoration(const AppliedTextDecoration& decoration)
{
RefPtr<AppliedTextDecorationList>& list = rareInheritedData.access()->appliedTextDecorations;
if (!list)
list = AppliedTextDecorationList::create();
else if (!list->hasOneRef())
list = list->copy();
if (inherited_flags.m_textUnderline) {
inherited_flags.m_textUnderline = false;
list->append(AppliedTextDecoration(TextDecorationUnderline));
}
list->append(decoration);
}
void RenderStyle::applyTextDecorations()
{
if (textDecoration() == TextDecorationNone)
return;
TextDecorationStyle style = textDecorationStyle();
StyleColor styleColor = decorationStyleColor();
int decorations = textDecoration();
if (decorations & TextDecorationUnderline) {
// To save memory, we don't use AppliedTextDecoration objects in the
// common case of a single simple underline.
AppliedTextDecoration underline(TextDecorationUnderline, style, styleColor);
if (!rareInheritedData->appliedTextDecorations && underline.isSimpleUnderline())
inherited_flags.m_textUnderline = true;
else
addAppliedTextDecoration(underline);
}
if (decorations & TextDecorationOverline)
addAppliedTextDecoration(AppliedTextDecoration(TextDecorationOverline, style, styleColor));
if (decorations & TextDecorationLineThrough)
addAppliedTextDecoration(AppliedTextDecoration(TextDecorationLineThrough, style, styleColor));
}
void RenderStyle::clearAppliedTextDecorations()
{
inherited_flags.m_textUnderline = false;
if (rareInheritedData->appliedTextDecorations)
rareInheritedData.access()->appliedTextDecorations = nullptr;
}
void RenderStyle::setFontStretch(FontStretch stretch)
{
FontSelector* currentFontSelector = font().fontSelector();
FontDescription desc(fontDescription());
desc.setStretch(stretch);
setFontDescription(desc);
font().update(currentFontSelector);
}
void RenderStyle::getShadowExtent(const ShadowList* shadowList, LayoutUnit &top, LayoutUnit &right, LayoutUnit &bottom, LayoutUnit &left) const
{
top = 0;
right = 0;
bottom = 0;
left = 0;
size_t shadowCount = shadowList ? shadowList->shadows().size() : 0;
for (size_t i = 0; i < shadowCount; ++i) {
const ShadowData& shadow = shadowList->shadows()[i];
if (shadow.style() == Inset)
continue;
float blurAndSpread = shadow.blur() + shadow.spread();
top = std::min<LayoutUnit>(top, shadow.y() - blurAndSpread);
right = std::max<LayoutUnit>(right, shadow.x() + blurAndSpread);
bottom = std::max<LayoutUnit>(bottom, shadow.y() + blurAndSpread);
left = std::min<LayoutUnit>(left, shadow.x() - blurAndSpread);
}
}
LayoutBoxExtent RenderStyle::getShadowInsetExtent(const ShadowList* shadowList) const
{
LayoutUnit top = 0;
LayoutUnit right = 0;
LayoutUnit bottom = 0;
LayoutUnit left = 0;
size_t shadowCount = shadowList ? shadowList->shadows().size() : 0;
for (size_t i = 0; i < shadowCount; ++i) {
const ShadowData& shadow = shadowList->shadows()[i];
if (shadow.style() == Normal)
continue;
float blurAndSpread = shadow.blur() + shadow.spread();
top = std::max<LayoutUnit>(top, shadow.y() + blurAndSpread);
right = std::min<LayoutUnit>(right, shadow.x() - blurAndSpread);
bottom = std::min<LayoutUnit>(bottom, shadow.y() - blurAndSpread);
left = std::max<LayoutUnit>(left, shadow.x() + blurAndSpread);
}
return LayoutBoxExtent(top, right, bottom, left);
}
void RenderStyle::getShadowHorizontalExtent(const ShadowList* shadowList, LayoutUnit &left, LayoutUnit &right) const
{
left = 0;
right = 0;
size_t shadowCount = shadowList ? shadowList->shadows().size() : 0;
for (size_t i = 0; i < shadowCount; ++i) {
const ShadowData& shadow = shadowList->shadows()[i];
if (shadow.style() == Inset)
continue;
float blurAndSpread = shadow.blur() + shadow.spread();
left = std::min<LayoutUnit>(left, shadow.x() - blurAndSpread);
right = std::max<LayoutUnit>(right, shadow.x() + blurAndSpread);
}
}
void RenderStyle::getShadowVerticalExtent(const ShadowList* shadowList, LayoutUnit &top, LayoutUnit &bottom) const
{
top = 0;
bottom = 0;
size_t shadowCount = shadowList ? shadowList->shadows().size() : 0;
for (size_t i = 0; i < shadowCount; ++i) {
const ShadowData& shadow = shadowList->shadows()[i];
if (shadow.style() == Inset)
continue;
float blurAndSpread = shadow.blur() + shadow.spread();
top = std::min<LayoutUnit>(top, shadow.y() - blurAndSpread);
bottom = std::max<LayoutUnit>(bottom, shadow.y() + blurAndSpread);
}
}
StyleColor RenderStyle::decorationStyleColor() const
{
StyleColor styleColor = textDecorationColor();
if (!styleColor.isCurrentColor())
return styleColor;
if (textStrokeWidth()) {
// Prefer stroke color if possible, but not if it's fully transparent.
StyleColor textStrokeStyleColor = textStrokeColor();
if (!textStrokeStyleColor.isCurrentColor() && textStrokeStyleColor.color().alpha())
return textStrokeStyleColor;
}
return textFillColor();
}
Color RenderStyle::decorationColor() const
{
return decorationStyleColor().resolve(color());
}
Color RenderStyle::colorIncludingFallback(int colorProperty) const
{
StyleColor result(StyleColor::currentColor());
EBorderStyle borderStyle = BNONE;
switch (colorProperty) {
case CSSPropertyBackgroundColor:
result = backgroundColor();
break;
case CSSPropertyBorderLeftColor:
result = borderLeftColor();
borderStyle = borderLeftStyle();
break;
case CSSPropertyBorderRightColor:
result = borderRightColor();
borderStyle = borderRightStyle();
break;
case CSSPropertyBorderTopColor:
result = borderTopColor();
borderStyle = borderTopStyle();
break;
case CSSPropertyBorderBottomColor:
result = borderBottomColor();
borderStyle = borderBottomStyle();
break;
case CSSPropertyColor:
result = color();
break;
case CSSPropertyOutlineColor:
result = outlineColor();
break;
case CSSPropertyWebkitTextEmphasisColor:
result = textEmphasisColor();
break;
case CSSPropertyWebkitTextFillColor:
result = textFillColor();
break;
case CSSPropertyWebkitTextStrokeColor:
result = textStrokeColor();
break;
case CSSPropertyWebkitTapHighlightColor:
result = tapHighlightColor();
break;
default:
ASSERT_NOT_REACHED();
break;
}
if (!result.isCurrentColor())
return result.color();
// FIXME: Treating styled borders with initial color differently causes problems
// See crbug.com/316559, crbug.com/276231
if ((borderStyle == INSET || borderStyle == OUTSET || borderStyle == RIDGE || borderStyle == GROOVE))
return Color(238, 238, 238);
return color();
}
const BorderValue& RenderStyle::borderBefore() const
{
// FIXME(sky): Remove
return borderTop();
}
const BorderValue& RenderStyle::borderAfter() const
{
// FIXME(sky): Remove
return borderBottom();
}
const BorderValue& RenderStyle::borderStart() const
{
return isLeftToRightDirection() ? borderLeft() : borderRight();
}
const BorderValue& RenderStyle::borderEnd() const
{
return isLeftToRightDirection() ? borderRight() : borderLeft();
}
unsigned short RenderStyle::borderBeforeWidth() const
{
// FIXME(sky): Remove
return borderTopWidth();
}
unsigned short RenderStyle::borderAfterWidth() const
{
// FIXME(sky): Remove
return borderBottomWidth();
}
unsigned short RenderStyle::borderStartWidth() const
{
return isLeftToRightDirection() ? borderLeftWidth() : borderRightWidth();
}
unsigned short RenderStyle::borderEndWidth() const
{
return isLeftToRightDirection() ? borderRightWidth() : borderLeftWidth();
}
void RenderStyle::setMarginStart(const Length& margin)
{
if (isLeftToRightDirection())
setMarginLeft(margin);
else
setMarginRight(margin);
}
void RenderStyle::setMarginEnd(const Length& margin)
{
if (isLeftToRightDirection())
setMarginRight(margin);
else
setMarginLeft(margin);
}
TextEmphasisMark RenderStyle::textEmphasisMark() const
{
TextEmphasisMark mark = static_cast<TextEmphasisMark>(rareInheritedData->textEmphasisMark);
if (mark != TextEmphasisMarkAuto)
return mark;
return TextEmphasisMarkDot;
}
Color RenderStyle::initialTapHighlightColor()
{
return RenderTheme::tapHighlightColor();
}
float calcBorderRadiiConstraintScaleFor(const FloatRect& rect, const FloatRoundedRect::Radii& radii)
{
// Constrain corner radii using CSS3 rules:
// http://www.w3.org/TR/css3-background/#the-border-radius
float factor = 1;
float radiiSum;
// top
radiiSum = radii.topLeft().width() + radii.topRight().width(); // Casts to avoid integer overflow.
if (radiiSum > rect.width())
factor = std::min(rect.width() / radiiSum, factor);
// bottom
radiiSum = radii.bottomLeft().width() + radii.bottomRight().width();
if (radiiSum > rect.width())
factor = std::min(rect.width() / radiiSum, factor);
// left
radiiSum = radii.topLeft().height() + radii.bottomLeft().height();
if (radiiSum > rect.height())
factor = std::min(rect.height() / radiiSum, factor);
// right
radiiSum = radii.topRight().height() + radii.bottomRight().height();
if (radiiSum > rect.height())
factor = std::min(rect.height() / radiiSum, factor);
ASSERT(factor <= 1);
return factor;
}
} // namespace blink