Source/WebCore/rendering/style/RenderStyle.cpp

   1 /*
   2  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
   3  * Copyright (C) 2004-2015 Apple Inc. All rights reserved.
   4  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public License
  17  * along with this library; see the file COPYING.LIB.  If not, write to
  18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #include "config.h"
  24 #include "RenderStyle.h"
  25
  26 #include "ContentData.h"
  27 #include "CursorList.h"
  28 #include "CSSPropertyNames.h"
  29 #include "FloatRoundedRect.h"
  30 #include "FontCascade.h"
  31 #include "FontSelector.h"
  32 #include "InlineTextBoxStyle.h"
  33 #include "Pagination.h"
  34 #include "QuotesData.h"
  35 #include "RenderObject.h"
  36 #include "ScaleTransformOperation.h"
  37 #include "ShadowData.h"
  38 #include "StyleImage.h"
  39 #include "StyleInheritedData.h"
  40 #include "StyleResolver.h"
  41 #include "StyleScrollSnapPoints.h"
  42 #include <wtf/MathExtras.h>
  43 #include <wtf/StdLibExtras.h>
  44 #include <algorithm>
  45
  46 #if ENABLE(IOS_TEXT_AUTOSIZING)
  47 #include <wtf/text/StringHash.h>
  48 #endif
  49
  50 #if ENABLE(TEXT_AUTOSIZING)
  51 #include "TextAutosizer.h"
  52 #endif
  53
  54 #if ENABLE(TOUCH_EVENTS)
  55 #include "RenderTheme.h"
  56 #endif
  57
  58 namespace WebCore {
  59
  60 struct SameSizeAsBorderValue {
  61     float m_width;
  62     RGBA32 m_color;
  63     int m_restBits;
  64 };
  65
  66 COMPILE_ASSERT(sizeof(BorderValue) == sizeof(SameSizeAsBorderValue), BorderValue_should_not_grow);
  67
  68 struct SameSizeAsRenderStyle : public RefCounted<SameSizeAsRenderStyle> {
  69     void* dataRefs[7];
  70     void* ownPtrs[1];
  71     void* dataRefSvgStyle;
  72     struct InheritedFlags {
  73         unsigned m_bitfields[2];
  74     } inherited_flags;
  75
  76     struct NonInheritedFlags {
  77         uint64_t m_flags;
  78     } noninherited_flags;
  79 };
  80
  81 COMPILE_ASSERT(sizeof(RenderStyle) == sizeof(SameSizeAsRenderStyle), RenderStyle_should_stay_small);
  82
  83 inline RenderStyle& defaultStyle()
  84 {
  85     static RenderStyle& style = RenderStyle::createDefaultStyle().leakRef();
  86     return style;
  87 }
  88
  89 Ref<RenderStyle> RenderStyle::create()
  90 {
  91     return adoptRef(*new RenderStyle(defaultStyle()));
  92 }
  93
  94 Ref<RenderStyle> RenderStyle::createDefaultStyle()
  95 {
  96     return adoptRef(*new RenderStyle(true));
  97 }
  98
  99 Ref<RenderStyle> RenderStyle::createAnonymousStyleWithDisplay(const RenderStyle* parentStyle, EDisplay display)
 100 {
 101     auto newStyle = RenderStyle::create();
 102     newStyle.get().inheritFrom(parentStyle);
 103     newStyle.get().inheritUnicodeBidiFrom(parentStyle);
 104     newStyle.get().setDisplay(display);
 105     return newStyle;
 106 }
 107
 108 Ref<RenderStyle> RenderStyle::clone(const RenderStyle* other)
 109 {
 110     return adoptRef(*new RenderStyle(*other));
 111 }
 112
 113 Ref<RenderStyle> RenderStyle::createStyleInheritingFromPseudoStyle(const RenderStyle& pseudoStyle)
 114 {
 115     ASSERT(pseudoStyle.styleType() == BEFORE || pseudoStyle.styleType() == AFTER);
 116
 117     auto style = RenderStyle::create();
 118     style.get().inheritFrom(&pseudoStyle);
 119     return style;
 120 }
 121
 122 ALWAYS_INLINE RenderStyle::RenderStyle(bool)
 123     : m_box(StyleBoxData::create())
 124     , visual(StyleVisualData::create())
 125     , m_background(StyleBackgroundData::create())
 126     , surround(StyleSurroundData::create())
 127     , rareNonInheritedData(StyleRareNonInheritedData::create())
 128     , rareInheritedData(StyleRareInheritedData::create())
 129     , inherited(StyleInheritedData::create())
 130     , m_svgStyle(SVGRenderStyle::create())
 131 {
 132     inherited_flags._empty_cells = initialEmptyCells();
 133     inherited_flags._caption_side = initialCaptionSide();
 134     inherited_flags._list_style_type = initialListStyleType();
 135     inherited_flags._list_style_position = initialListStylePosition();
 136     inherited_flags._visibility = initialVisibility();
 137     inherited_flags._text_align = initialTextAlign();
 138     inherited_flags._text_transform = initialTextTransform();
 139     inherited_flags._text_decorations = initialTextDecoration();
 140     inherited_flags._cursor_style = initialCursor();
 141 #if ENABLE(CURSOR_VISIBILITY)
 142     inherited_flags.m_cursorVisibility = initialCursorVisibility();
 143 #endif
 144     inherited_flags._direction = initialDirection();
 145     inherited_flags._white_space = initialWhiteSpace();
 146     inherited_flags._border_collapse = initialBorderCollapse();
 147     inherited_flags.m_rtlOrdering = initialRTLOrdering();
 148     inherited_flags._box_direction = initialBoxDirection();
 149     inherited_flags.m_printColorAdjust = initialPrintColorAdjust();
 150     inherited_flags._pointerEvents = initialPointerEvents();
 151     inherited_flags._insideLink = NotInsideLink;
 152     inherited_flags._insideDefaultButton = false;
 153     inherited_flags.m_writingMode = initialWritingMode();
 154
 155     static_assert((sizeof(InheritedFlags) <= 8), "InheritedFlags does not grow");
 156     static_assert((sizeof(NonInheritedFlags) <= 8), "NonInheritedFlags does not grow");
 157 }
 158
 159 ALWAYS_INLINE RenderStyle::RenderStyle(const RenderStyle& o)
 160     : RefCounted<RenderStyle>()
 161     , m_box(o.m_box)
 162     , visual(o.visual)
 163     , m_background(o.m_background)
 164     , surround(o.surround)
 165     , rareNonInheritedData(o.rareNonInheritedData)
 166     , rareInheritedData(o.rareInheritedData)
 167     , inherited(o.inherited)
 168     , m_svgStyle(o.m_svgStyle)
 169     , inherited_flags(o.inherited_flags)
 170     , noninherited_flags(o.noninherited_flags)
 171 {
 172 }
 173
 174 ItemPosition RenderStyle::resolveAlignment(const RenderStyle& parentStyle, const RenderStyle& childStyle, ItemPosition resolvedAutoPositionForRenderer)
 175 {
 176     // The auto keyword computes to the parent's align-items computed value, or to "stretch", if not set or "auto".
 177     if (childStyle.alignSelf() == ItemPositionAuto)
 178         return (parentStyle.alignItems() == ItemPositionAuto) ? resolvedAutoPositionForRenderer : parentStyle.alignItems();
 179     return childStyle.alignSelf();
 180 }
 181
 182 void RenderStyle::inheritFrom(const RenderStyle* inheritParent, IsAtShadowBoundary isAtShadowBoundary)
 183 {
 184     if (isAtShadowBoundary == AtShadowBoundary) {
 185         // Even if surrounding content is user-editable, shadow DOM should act as a single unit, and not necessarily be editable
 186         EUserModify currentUserModify = userModify();
 187         rareInheritedData = inheritParent->rareInheritedData;
 188         setUserModify(currentUserModify);
 189     } else
 190         rareInheritedData = inheritParent->rareInheritedData;
 191     inherited = inheritParent->inherited;
 192     inherited_flags = inheritParent->inherited_flags;
 193
 194     if (m_svgStyle != inheritParent->m_svgStyle)
 195         m_svgStyle.access()->inheritFrom(inheritParent->m_svgStyle.get());
 196 }
 197
 198 void RenderStyle::copyNonInheritedFrom(const RenderStyle* other)
 199 {
 200     m_box = other->m_box;
 201     visual = other->visual;
 202     m_background = other->m_background;
 203     surround = other->surround;
 204     rareNonInheritedData = other->rareNonInheritedData;
 205     noninherited_flags.copyNonInheritedFrom(other->noninherited_flags);
 206
 207     if (m_svgStyle != other->m_svgStyle)
 208         m_svgStyle.access()->copyNonInheritedFrom(other->m_svgStyle.get());
 209
 210     ASSERT(zoom() == initialZoom());
 211 }
 212
 213 bool RenderStyle::operator==(const RenderStyle& o) const
 214 {
 215     // compare everything except the pseudoStyle pointer
 216     return inherited_flags == o.inherited_flags
 217         && noninherited_flags == o.noninherited_flags
 218         && m_box == o.m_box
 219         && visual == o.visual
 220         && m_background == o.m_background
 221         && surround == o.surround
 222         && rareNonInheritedData == o.rareNonInheritedData
 223         && rareInheritedData == o.rareInheritedData
 224         && inherited == o.inherited
 225         && m_svgStyle == o.m_svgStyle
 226             ;
 227 }
 228
 229 bool RenderStyle::isStyleAvailable() const
 230 {
 231     return this != StyleResolver::styleNotYetAvailable();
 232 }
 233
 234 bool RenderStyle::hasUniquePseudoStyle() const
 235 {
 236     if (!m_cachedPseudoStyles || styleType() != NOPSEUDO)
 237         return false;
 238
 239     for (size_t i = 0; i < m_cachedPseudoStyles->size(); ++i) {
 240         RenderStyle* pseudoStyle = m_cachedPseudoStyles->at(i).get();
 241         if (pseudoStyle->unique())
 242             return true;
 243     }
 244
 245     return false;
 246 }
 247
 248 RenderStyle* RenderStyle::getCachedPseudoStyle(PseudoId pid) const
 249 {
 250     if (!m_cachedPseudoStyles || !m_cachedPseudoStyles->size())
 251         return 0;
 252
 253     if (styleType() != NOPSEUDO)
 254         return 0;
 255
 256     for (size_t i = 0; i < m_cachedPseudoStyles->size(); ++i) {
 257         RenderStyle* pseudoStyle = m_cachedPseudoStyles->at(i).get();
 258         if (pseudoStyle->styleType() == pid)
 259             return pseudoStyle;
 260     }
 261
 262     return 0;
 263 }
 264
 265 RenderStyle* RenderStyle::addCachedPseudoStyle(PassRefPtr<RenderStyle> pseudo)
 266 {
 267     if (!pseudo)
 268         return 0;
 269
 270     ASSERT(pseudo->styleType() > NOPSEUDO);
 271
 272     RenderStyle* result = pseudo.get();
 273
 274     if (!m_cachedPseudoStyles)
 275         m_cachedPseudoStyles = std::make_unique<PseudoStyleCache>();
 276
 277     m_cachedPseudoStyles->append(pseudo);
 278
 279     return result;
 280 }
 281
 282 void RenderStyle::removeCachedPseudoStyle(PseudoId pid)
 283 {
 284     if (!m_cachedPseudoStyles)
 285         return;
 286     for (size_t i = 0; i < m_cachedPseudoStyles->size(); ++i) {
 287         RenderStyle* pseudoStyle = m_cachedPseudoStyles->at(i).get();
 288         if (pseudoStyle->styleType() == pid) {
 289             m_cachedPseudoStyles->remove(i);
 290             return;
 291         }
 292     }
 293 }
 294
 295 bool RenderStyle::inheritedNotEqual(const RenderStyle* other) const
 296 {
 297     return inherited_flags != other->inherited_flags
 298            || inherited != other->inherited
 299            || m_svgStyle->inheritedNotEqual(other->m_svgStyle.get())
 300            || rareInheritedData != other->rareInheritedData;
 301 }
 302
 303 #if ENABLE(IOS_TEXT_AUTOSIZING)
 304 inline unsigned computeFontHash(const FontCascade& font)
 305 {
 306     unsigned hashCodes[2] = {
 307         CaseFoldingHash::hash(font.fontDescription().firstFamily().impl()),
 308         static_cast<unsigned>(font.fontDescription().specifiedSize())
 309     };
 310     return StringHasher::computeHash(reinterpret_cast<UChar*>(hashCodes), 2 * sizeof(unsigned) / sizeof(UChar));
 311 }
 312
 313 uint32_t RenderStyle::hashForTextAutosizing() const
 314 {
 315     // FIXME: Not a very smart hash. Could be improved upon. See <https://bugs.webkit.org/show_bug.cgi?id=121131>.
 316     uint32_t hash = 0;
 317
 318     hash ^= rareNonInheritedData->m_appearance;
 319     hash ^= rareNonInheritedData->marginBeforeCollapse;
 320     hash ^= rareNonInheritedData->marginAfterCollapse;
 321     hash ^= rareNonInheritedData->lineClamp.value();
 322     hash ^= rareInheritedData->overflowWrap;
 323     hash ^= rareInheritedData->nbspMode;
 324     hash ^= rareInheritedData->lineBreak;
 325     hash ^= WTF::FloatHash<float>::hash(inherited->specifiedLineHeight.value());
 326     hash ^= computeFontHash(inherited->fontCascade);
 327     hash ^= inherited->horizontal_border_spacing;
 328     hash ^= inherited->vertical_border_spacing;
 329     hash ^= inherited_flags._box_direction;
 330     hash ^= inherited_flags.m_rtlOrdering;
 331     hash ^= noninherited_flags.position();
 332     hash ^= noninherited_flags.floating();
 333     hash ^= rareNonInheritedData->textOverflow;
 334     hash ^= rareInheritedData->textSecurity;
 335     return hash;
 336 }
 337
 338 bool RenderStyle::equalForTextAutosizing(const RenderStyle* other) const
 339 {
 340     return rareNonInheritedData->m_appearance == other->rareNonInheritedData->m_appearance
 341         && rareNonInheritedData->marginBeforeCollapse == other->rareNonInheritedData->marginBeforeCollapse
 342         && rareNonInheritedData->marginAfterCollapse == other->rareNonInheritedData->marginAfterCollapse
 343         && rareNonInheritedData->lineClamp == other->rareNonInheritedData->lineClamp
 344         && rareInheritedData->textSizeAdjust == other->rareInheritedData->textSizeAdjust
 345         && rareInheritedData->overflowWrap == other->rareInheritedData->overflowWrap
 346         && rareInheritedData->nbspMode == other->rareInheritedData->nbspMode
 347         && rareInheritedData->lineBreak == other->rareInheritedData->lineBreak
 348         && rareInheritedData->textSecurity == other->rareInheritedData->textSecurity
 349         && inherited->specifiedLineHeight == other->inherited->specifiedLineHeight
 350         && inherited->fontCascade.equalForTextAutoSizing(other->inherited->fontCascade)
 351         && inherited->horizontal_border_spacing == other->inherited->horizontal_border_spacing
 352         && inherited->vertical_border_spacing == other->inherited->vertical_border_spacing
 353         && inherited_flags._box_direction == other->inherited_flags._box_direction
 354         && inherited_flags.m_rtlOrdering == other->inherited_flags.m_rtlOrdering
 355         && noninherited_flags.position() == other->noninherited_flags.position()
 356         && noninherited_flags.floating() == other->noninherited_flags.floating()
 357         && rareNonInheritedData->textOverflow == other->rareNonInheritedData->textOverflow;
 358 }
 359 #endif // ENABLE(IOS_TEXT_AUTOSIZING)
 360
 361 bool RenderStyle::inheritedDataShared(const RenderStyle* other) const
 362 {
 363     // This is a fast check that only looks if the data structures are shared.
 364     return inherited_flags == other->inherited_flags
 365         && inherited.get() == other->inherited.get()
 366         && m_svgStyle.get() == other->m_svgStyle.get()
 367         && rareInheritedData.get() == other->rareInheritedData.get();
 368 }
 369
 370 static bool positionChangeIsMovementOnly(const LengthBox& a, const LengthBox& b, const Length& width)
 371 {
 372     // If any unit types are different, then we can't guarantee
 373     // that this was just a movement.
 374     if (a.left().type() != b.left().type()
 375         || a.right().type() != b.right().type()
 376         || a.top().type() != b.top().type()
 377         || a.bottom().type() != b.bottom().type())
 378         return false;
 379
 380     // Only one unit can be non-auto in the horizontal direction and
 381     // in the vertical direction.  Otherwise the adjustment of values
 382     // is changing the size of the box.
 383     if (!a.left().isIntrinsicOrAuto() && !a.right().isIntrinsicOrAuto())
 384         return false;
 385     if (!a.top().isIntrinsicOrAuto() && !a.bottom().isIntrinsicOrAuto())
 386         return false;
 387     // If our width is auto and left or right is specified then this
 388     // is not just a movement - we need to resize to our container.
 389     if ((!a.left().isIntrinsicOrAuto() || !a.right().isIntrinsicOrAuto()) && width.isIntrinsicOrAuto())
 390         return false;
 391
 392     // One of the units is fixed or percent in both directions and stayed
 393     // that way in the new style.  Therefore all we are doing is moving.
 394     return true;
 395 }
 396
 397 inline bool RenderStyle::changeAffectsVisualOverflow(const RenderStyle& other) const
 398 {
 399     if (rareNonInheritedData.get() != other.rareNonInheritedData.get()
 400         && !rareNonInheritedData->shadowDataEquivalent(*other.rareNonInheritedData.get()))
 401         return true;
 402
 403     if (rareInheritedData.get() != other.rareInheritedData.get()
 404         && !rareInheritedData->shadowDataEquivalent(*other.rareInheritedData.get()))
 405         return true;
 406
 407     if (inherited_flags._text_decorations != other.inherited_flags._text_decorations
 408         || visual->textDecoration != other.visual->textDecoration
 409         || rareNonInheritedData->m_textDecorationStyle != other.rareNonInheritedData->m_textDecorationStyle) {
 410         // Underlines are always drawn outside of their textbox bounds when text-underline-position: under;
 411         // is specified. We can take an early out here.
 412         if (textUnderlinePosition() == TextUnderlinePositionUnder
 413             || other.textUnderlinePosition() == TextUnderlinePositionUnder)
 414             return true;
 415         return visualOverflowForDecorations(*this, nullptr) != visualOverflowForDecorations(other, nullptr);
 416     }
 417
 418     return false;
 419 }
 420
 421 bool RenderStyle::changeRequiresLayout(const RenderStyle& other, unsigned& changedContextSensitiveProperties) const
 422 {
 423     if (m_box->width() != other.m_box->width()
 424         || m_box->minWidth() != other.m_box->minWidth()
 425         || m_box->maxWidth() != other.m_box->maxWidth()
 426         || m_box->height() != other.m_box->height()
 427         || m_box->minHeight() != other.m_box->minHeight()
 428         || m_box->maxHeight() != other.m_box->maxHeight())
 429         return true;
 430
 431     if (m_box->verticalAlign() != other.m_box->verticalAlign() || noninherited_flags.verticalAlign() != other.noninherited_flags.verticalAlign())
 432         return true;
 433
 434     if (m_box->boxSizing() != other.m_box->boxSizing())
 435         return true;
 436
 437     if (surround->margin != other.surround->margin)
 438         return true;
 439
 440     if (surround->padding != other.surround->padding)
 441         return true;
 442
 443     // FIXME: We should add an optimized form of layout that just recomputes visual overflow.
 444     if (changeAffectsVisualOverflow(other))
 445         return true;
 446
 447     if (rareNonInheritedData.get() != other.rareNonInheritedData.get()) {
 448         if (rareNonInheritedData->m_appearance != other.rareNonInheritedData->m_appearance
 449             || rareNonInheritedData->marginBeforeCollapse != other.rareNonInheritedData->marginBeforeCollapse
 450             || rareNonInheritedData->marginAfterCollapse != other.rareNonInheritedData->marginAfterCollapse
 451             || rareNonInheritedData->lineClamp != other.rareNonInheritedData->lineClamp
 452             || rareNonInheritedData->m_initialLetter != other.rareNonInheritedData->m_initialLetter
 453             || rareNonInheritedData->textOverflow != other.rareNonInheritedData->textOverflow)
 454             return true;
 455
 456         if (rareNonInheritedData->m_regionFragment != other.rareNonInheritedData->m_regionFragment)
 457             return true;
 458
 459 #if ENABLE(CSS_SHAPES)
 460         if (rareNonInheritedData->m_shapeMargin != other.rareNonInheritedData->m_shapeMargin)
 461             return true;
 462 #endif
 463
 464         if (rareNonInheritedData->m_deprecatedFlexibleBox.get() != other.rareNonInheritedData->m_deprecatedFlexibleBox.get()
 465             && *rareNonInheritedData->m_deprecatedFlexibleBox.get() != *other.rareNonInheritedData->m_deprecatedFlexibleBox.get())
 466             return true;
 467
 468         if (rareNonInheritedData->m_flexibleBox.get() != other.rareNonInheritedData->m_flexibleBox.get()
 469             && *rareNonInheritedData->m_flexibleBox.get() != *other.rareNonInheritedData->m_flexibleBox.get())
 470             return true;
 471         if (rareNonInheritedData->m_order != other.rareNonInheritedData->m_order
 472             || rareNonInheritedData->m_alignContent != other.rareNonInheritedData->m_alignContent
 473             || rareNonInheritedData->m_alignItems != other.rareNonInheritedData->m_alignItems
 474             || rareNonInheritedData->m_alignSelf != other.rareNonInheritedData->m_alignSelf
 475             || rareNonInheritedData->m_justifyContent != other.rareNonInheritedData->m_justifyContent)
 476             return true;
 477
 478         if (!rareNonInheritedData->reflectionDataEquivalent(*other.rareNonInheritedData.get()))
 479             return true;
 480
 481         if (rareNonInheritedData->m_multiCol.get() != other.rareNonInheritedData->m_multiCol.get()
 482             && *rareNonInheritedData->m_multiCol.get() != *other.rareNonInheritedData->m_multiCol.get())
 483             return true;
 484
 485         if (rareNonInheritedData->m_transform != other.rareNonInheritedData->m_transform) {
 486             if (rareNonInheritedData->m_transform->hasTransform() != other.rareNonInheritedData->m_transform->hasTransform())
 487                 return true;
 488             if (*rareNonInheritedData->m_transform != *other.rareNonInheritedData->m_transform) {
 489                 changedContextSensitiveProperties |= ContextSensitivePropertyTransform;
 490                 // Don't return; keep looking for another change
 491             }
 492         }
 493
 494 #if ENABLE(CSS_GRID_LAYOUT)
 495         if (rareNonInheritedData->m_grid.get() != other.rareNonInheritedData->m_grid.get()
 496             || rareNonInheritedData->m_gridItem.get() != other.rareNonInheritedData->m_gridItem.get())
 497             return true;
 498 #endif
 499
 500 #if ENABLE(DASHBOARD_SUPPORT)
 501         // If regions change, trigger a relayout to re-calc regions.
 502         if (rareNonInheritedData->m_dashboardRegions != other.rareNonInheritedData->m_dashboardRegions)
 503             return true;
 504 #endif
 505     }
 506
 507     if (rareInheritedData.get() != other.rareInheritedData.get()) {
 508         if (rareInheritedData->indent != other.rareInheritedData->indent
 509 #if ENABLE(CSS3_TEXT)
 510             || rareInheritedData->m_textAlignLast != other.rareInheritedData->m_textAlignLast
 511             || rareInheritedData->m_textJustify != other.rareInheritedData->m_textJustify
 512             || rareInheritedData->m_textIndentLine != other.rareInheritedData->m_textIndentLine
 513 #endif
 514             || rareInheritedData->m_effectiveZoom != other.rareInheritedData->m_effectiveZoom
 515 #if ENABLE(IOS_TEXT_AUTOSIZING)
 516             || rareInheritedData->textSizeAdjust != other.rareInheritedData->textSizeAdjust
 517 #endif
 518             || rareInheritedData->wordBreak != other.rareInheritedData->wordBreak
 519             || rareInheritedData->overflowWrap != other.rareInheritedData->overflowWrap
 520             || rareInheritedData->nbspMode != other.rareInheritedData->nbspMode
 521             || rareInheritedData->lineBreak != other.rareInheritedData->lineBreak
 522             || rareInheritedData->textSecurity != other.rareInheritedData->textSecurity
 523             || rareInheritedData->hyphens != other.rareInheritedData->hyphens
 524             || rareInheritedData->hyphenationLimitBefore != other.rareInheritedData->hyphenationLimitBefore
 525             || rareInheritedData->hyphenationLimitAfter != other.rareInheritedData->hyphenationLimitAfter
 526             || rareInheritedData->hyphenationString != other.rareInheritedData->hyphenationString
 527             || rareInheritedData->locale != other.rareInheritedData->locale
 528             || rareInheritedData->m_rubyPosition != other.rareInheritedData->m_rubyPosition
 529             || rareInheritedData->textEmphasisMark != other.rareInheritedData->textEmphasisMark
 530             || rareInheritedData->textEmphasisPosition != other.rareInheritedData->textEmphasisPosition
 531             || rareInheritedData->textEmphasisCustomMark != other.rareInheritedData->textEmphasisCustomMark
 532             || rareInheritedData->m_textOrientation != other.rareInheritedData->m_textOrientation
 533             || rareInheritedData->m_tabSize != other.rareInheritedData->m_tabSize
 534             || rareInheritedData->m_lineBoxContain != other.rareInheritedData->m_lineBoxContain
 535             || rareInheritedData->m_lineGrid != other.rareInheritedData->m_lineGrid
 536 #if ENABLE(CSS_IMAGE_ORIENTATION)
 537             || rareInheritedData->m_imageOrientation != other.rareInheritedData->m_imageOrientation
 538 #endif
 539 #if ENABLE(CSS_IMAGE_RESOLUTION)
 540             || rareInheritedData->m_imageResolutionSource != other.rareInheritedData->m_imageResolutionSource
 541             || rareInheritedData->m_imageResolutionSnap != other.rareInheritedData->m_imageResolutionSnap
 542             || rareInheritedData->m_imageResolution != other.rareInheritedData->m_imageResolution
 543 #endif
 544             || rareInheritedData->m_lineSnap != other.rareInheritedData->m_lineSnap
 545             || rareInheritedData->m_lineAlign != other.rareInheritedData->m_lineAlign
 546 #if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
 547             || rareInheritedData->useTouchOverflowScrolling != other.rareInheritedData->useTouchOverflowScrolling
 548 #endif
 549             || rareInheritedData->listStyleImage != other.rareInheritedData->listStyleImage)
 550             return true;
 551
 552         if (textStrokeWidth() != other.textStrokeWidth())
 553             return true;
 554     }
 555
 556 #if ENABLE(TEXT_AUTOSIZING)
 557     if (visual->m_textAutosizingMultiplier != other.visual->m_textAutosizingMultiplier)
 558         return true;
 559 #endif
 560
 561     if (inherited->line_height != other.inherited->line_height
 562 #if ENABLE(IOS_TEXT_AUTOSIZING)
 563         || inherited->specifiedLineHeight != other.inherited->specifiedLineHeight
 564 #endif
 565         || inherited->fontCascade != other.inherited->fontCascade
 566         || inherited->horizontal_border_spacing != other.inherited->horizontal_border_spacing
 567         || inherited->vertical_border_spacing != other.inherited->vertical_border_spacing
 568         || inherited_flags._box_direction != other.inherited_flags._box_direction
 569         || inherited_flags.m_rtlOrdering != other.inherited_flags.m_rtlOrdering
 570         || noninherited_flags.position() != other.noninherited_flags.position()
 571         || noninherited_flags.floating() != other.noninherited_flags.floating()
 572         || noninherited_flags.originalDisplay() != other.noninherited_flags.originalDisplay())
 573         return true;
 574
 575
 576     if ((noninherited_flags.effectiveDisplay()) >= TABLE) {
 577         if (inherited_flags._border_collapse != other.inherited_flags._border_collapse
 578             || inherited_flags._empty_cells != other.inherited_flags._empty_cells
 579             || inherited_flags._caption_side != other.inherited_flags._caption_side
 580             || noninherited_flags.tableLayout() != other.noninherited_flags.tableLayout())
 581             return true;
 582
 583         // In the collapsing border model, 'hidden' suppresses other borders, while 'none'
 584         // does not, so these style differences can be width differences.
 585         if (inherited_flags._border_collapse
 586             && ((borderTopStyle() == BHIDDEN && other.borderTopStyle() == BNONE)
 587                 || (borderTopStyle() == BNONE && other.borderTopStyle() == BHIDDEN)
 588                 || (borderBottomStyle() == BHIDDEN && other.borderBottomStyle() == BNONE)
 589                 || (borderBottomStyle() == BNONE && other.borderBottomStyle() == BHIDDEN)
 590                 || (borderLeftStyle() == BHIDDEN && other.borderLeftStyle() == BNONE)
 591                 || (borderLeftStyle() == BNONE && other.borderLeftStyle() == BHIDDEN)
 592                 || (borderRightStyle() == BHIDDEN && other.borderRightStyle() == BNONE)
 593                 || (borderRightStyle() == BNONE && other.borderRightStyle() == BHIDDEN)))
 594             return true;
 595     }
 596
 597     if (noninherited_flags.effectiveDisplay() == LIST_ITEM) {
 598         if (inherited_flags._list_style_type != other.inherited_flags._list_style_type
 599             || inherited_flags._list_style_position != other.inherited_flags._list_style_position)
 600             return true;
 601     }
 602
 603     if (inherited_flags._text_align != other.inherited_flags._text_align
 604         || inherited_flags._text_transform != other.inherited_flags._text_transform
 605         || inherited_flags._direction != other.inherited_flags._direction
 606         || inherited_flags._white_space != other.inherited_flags._white_space
 607         || noninherited_flags.clear() != other.noninherited_flags.clear()
 608         || noninherited_flags.unicodeBidi() != other.noninherited_flags.unicodeBidi())
 609         return true;
 610
 611     // Check block flow direction.
 612     if (inherited_flags.m_writingMode != other.inherited_flags.m_writingMode)
 613         return true;
 614
 615     // Check text combine mode.
 616     if (rareNonInheritedData->m_textCombine != other.rareNonInheritedData->m_textCombine)
 617         return true;
 618
 619     // Overflow returns a layout hint.
 620     if (noninherited_flags.overflowX() != other.noninherited_flags.overflowX()
 621         || noninherited_flags.overflowY() != other.noninherited_flags.overflowY())
 622         return true;
 623
 624     // If our border widths change, then we need to layout.  Other changes to borders
 625     // only necessitate a repaint.
 626     if (borderLeftWidth() != other.borderLeftWidth()
 627         || borderTopWidth() != other.borderTopWidth()
 628         || borderBottomWidth() != other.borderBottomWidth()
 629         || borderRightWidth() != other.borderRightWidth())
 630         return true;
 631
 632     // If the counter directives change, trigger a relayout to re-calculate counter values and rebuild the counter node tree.
 633     const CounterDirectiveMap* mapA = rareNonInheritedData->m_counterDirectives.get();
 634     const CounterDirectiveMap* mapB = other.rareNonInheritedData->m_counterDirectives.get();
 635     if (!(mapA == mapB || (mapA && mapB && *mapA == *mapB)))
 636         return true;
 637
 638     if ((visibility() == COLLAPSE) != (other.visibility() == COLLAPSE))
 639         return true;
 640
 641     if (rareNonInheritedData->hasOpacity() != other.rareNonInheritedData->hasOpacity()) {
 642         // FIXME: We would like to use SimplifiedLayout here, but we can't quite do that yet.
 643         // We need to make sure SimplifiedLayout can operate correctly on RenderInlines (we will need
 644         // to add a selfNeedsSimplifiedLayout bit in order to not get confused and taint every line).
 645         // In addition we need to solve the floating object issue when layers come and go. Right now
 646         // a full layout is necessary to keep floating object lists sane.
 647         return true;
 648     }
 649
 650     if (rareNonInheritedData->hasFilters() != other.rareNonInheritedData->hasFilters())
 651         return true;
 652
 653 #if ENABLE(FILTERS_LEVEL_2)
 654     if (rareNonInheritedData->hasBackdropFilters() != other.rareNonInheritedData->hasBackdropFilters())
 655         return true;
 656 #endif
 657
 658     const QuotesData* quotesDataA = rareInheritedData->quotes.get();
 659     const QuotesData* quotesDataB = other.rareInheritedData->quotes.get();
 660     if (!(quotesDataA == quotesDataB || (quotesDataA && quotesDataB && *quotesDataA == *quotesDataB)))
 661         return true;
 662
 663     if (position() != StaticPosition) {
 664         if (surround->offset != other.surround->offset) {
 665             // FIXME: We would like to use SimplifiedLayout for relative positioning, but we can't quite do that yet.
 666             // We need to make sure SimplifiedLayout can operate correctly on RenderInlines (we will need
 667             // to add a selfNeedsSimplifiedLayout bit in order to not get confused and taint every line).
 668             if (position() != AbsolutePosition)
 669                 return true;
 670
 671             // Optimize for the case where a positioned layer is moving but not changing size.
 672             if (!positionChangeIsMovementOnly(surround->offset, other.surround->offset, m_box->width()))
 673                 return true;
 674         }
 675     }
 676
 677     return false;
 678 }
 679
 680 bool RenderStyle::changeRequiresPositionedLayoutOnly(const RenderStyle& other, unsigned&) const
 681 {
 682     if (position() == StaticPosition)
 683         return false;
 684
 685     if (surround->offset != other.surround->offset) {
 686         // Optimize for the case where a positioned layer is moving but not changing size.
 687         if (position() == AbsolutePosition && positionChangeIsMovementOnly(surround->offset, other.surround->offset, m_box->width()))
 688             return true;
 689     }
 690
 691     return false;
 692 }
 693
 694 bool RenderStyle::changeRequiresLayerRepaint(const RenderStyle& other, unsigned& changedContextSensitiveProperties) const
 695 {
 696     // StyleResolver has ensured that zIndex is non-auto only if it's applicable.
 697     if (m_box->zIndex() != other.m_box->zIndex() || m_box->hasAutoZIndex() != other.m_box->hasAutoZIndex())
 698         return true;
 699
 700     if (position() != StaticPosition) {
 701         if (visual->clip != other.visual->clip || visual->hasClip != other.visual->hasClip) {
 702             changedContextSensitiveProperties |= ContextSensitivePropertyClipRect;
 703             return true;
 704         }
 705     }
 706
 707 #if ENABLE(CSS_COMPOSITING)
 708     if (rareNonInheritedData->m_effectiveBlendMode != other.rareNonInheritedData->m_effectiveBlendMode)
 709         return true;
 710 #endif
 711
 712     if (rareNonInheritedData->opacity != other.rareNonInheritedData->opacity) {
 713         changedContextSensitiveProperties |= ContextSensitivePropertyOpacity;
 714         // Don't return; keep looking for another change.
 715     }
 716
 717     if (rareNonInheritedData->m_filter.get() != other.rareNonInheritedData->m_filter.get()
 718         && *rareNonInheritedData->m_filter.get() != *other.rareNonInheritedData->m_filter.get()) {
 719         changedContextSensitiveProperties |= ContextSensitivePropertyFilter;
 720         // Don't return; keep looking for another change.
 721     }
 722
 723     if (rareNonInheritedData->m_mask != other.rareNonInheritedData->m_mask
 724         || rareNonInheritedData->m_maskBoxImage != other.rareNonInheritedData->m_maskBoxImage)
 725         return true;
 726
 727     return false;
 728 }
 729
 730 bool RenderStyle::changeRequiresRepaint(const RenderStyle& other, unsigned& changedContextSensitiveProperties) const
 731 {
 732     if (inherited_flags._visibility != other.inherited_flags._visibility
 733         || inherited_flags.m_printColorAdjust != other.inherited_flags.m_printColorAdjust
 734         || inherited_flags._insideLink != other.inherited_flags._insideLink
 735         || inherited_flags._insideDefaultButton != other.inherited_flags._insideDefaultButton
 736         || surround->border != other.surround->border
 737         || !m_background->isEquivalentForPainting(*other.m_background)
 738         || rareInheritedData->userModify != other.rareInheritedData->userModify
 739         || rareInheritedData->userSelect != other.rareInheritedData->userSelect
 740         || rareNonInheritedData->userDrag != other.rareNonInheritedData->userDrag
 741         || rareNonInheritedData->m_borderFit != other.rareNonInheritedData->m_borderFit
 742         || rareNonInheritedData->m_objectFit != other.rareNonInheritedData->m_objectFit
 743         || rareInheritedData->m_imageRendering != other.rareInheritedData->m_imageRendering)
 744         return true;
 745
 746 #if ENABLE(CSS_SHAPES)
 747     if (rareNonInheritedData->m_shapeOutside != other.rareNonInheritedData->m_shapeOutside)
 748         return true;
 749 #endif
 750
 751     // FIXME: this should probably be moved to changeRequiresLayerRepaint().
 752     if (rareNonInheritedData->m_clipPath != other.rareNonInheritedData->m_clipPath) {
 753         changedContextSensitiveProperties |= ContextSensitivePropertyClipPath;
 754         // Don't return; keep looking for another change.
 755     }
 756
 757     return false;
 758 }
 759
 760 bool RenderStyle::changeRequiresRepaintIfTextOrBorderOrOutline(const RenderStyle& other, unsigned&) const
 761 {
 762     if (inherited->color != other.inherited->color
 763         || inherited_flags._text_decorations != other.inherited_flags._text_decorations
 764         || visual->textDecoration != other.visual->textDecoration
 765         || rareNonInheritedData->m_textDecorationStyle != other.rareNonInheritedData->m_textDecorationStyle
 766         || rareNonInheritedData->m_textDecorationColor != other.rareNonInheritedData->m_textDecorationColor
 767         || rareInheritedData->m_textDecorationSkip != other.rareInheritedData->m_textDecorationSkip
 768         || rareInheritedData->textFillColor != other.rareInheritedData->textFillColor
 769         || rareInheritedData->textStrokeColor != other.rareInheritedData->textStrokeColor
 770         || rareInheritedData->textEmphasisColor != other.rareInheritedData->textEmphasisColor
 771         || rareInheritedData->textEmphasisFill != other.rareInheritedData->textEmphasisFill)
 772         return true;
 773
 774     return false;
 775 }
 776
 777 bool RenderStyle::changeRequiresRecompositeLayer(const RenderStyle& other, unsigned&) const
 778 {
 779     if (rareNonInheritedData.get() != other.rareNonInheritedData.get()) {
 780         if (rareNonInheritedData->m_transformStyle3D != other.rareNonInheritedData->m_transformStyle3D
 781             || rareNonInheritedData->m_backfaceVisibility != other.rareNonInheritedData->m_backfaceVisibility
 782             || rareNonInheritedData->m_perspective != other.rareNonInheritedData->m_perspective
 783             || rareNonInheritedData->m_perspectiveOriginX != other.rareNonInheritedData->m_perspectiveOriginX
 784             || rareNonInheritedData->m_perspectiveOriginY != other.rareNonInheritedData->m_perspectiveOriginY)
 785             return true;
 786     }
 787
 788     return false;
 789 }
 790
 791 StyleDifference RenderStyle::diff(const RenderStyle& other, unsigned& changedContextSensitiveProperties) const
 792 {
 793     changedContextSensitiveProperties = ContextSensitivePropertyNone;
 794
 795     StyleDifference svgChange = StyleDifferenceEqual;
 796     if (m_svgStyle != other.m_svgStyle) {
 797         svgChange = m_svgStyle->diff(other.m_svgStyle.get());
 798         if (svgChange == StyleDifferenceLayout)
 799             return svgChange;
 800     }
 801
 802     if (changeRequiresLayout(other, changedContextSensitiveProperties))
 803         return StyleDifferenceLayout;
 804
 805     // SVGRenderStyle::diff() might have returned StyleDifferenceRepaint, eg. if fill changes.
 806     // If eg. the font-size changed at the same time, we're not allowed to return StyleDifferenceRepaint,
 807     // but have to return StyleDifferenceLayout, that's why  this if branch comes after all branches
 808     // that are relevant for SVG and might return StyleDifferenceLayout.
 809     if (svgChange != StyleDifferenceEqual)
 810         return svgChange;
 811
 812     if (changeRequiresPositionedLayoutOnly(other, changedContextSensitiveProperties))
 813         return StyleDifferenceLayoutPositionedMovementOnly;
 814
 815     if (changeRequiresLayerRepaint(other, changedContextSensitiveProperties))
 816         return StyleDifferenceRepaintLayer;
 817
 818     if (changeRequiresRepaint(other, changedContextSensitiveProperties))
 819         return StyleDifferenceRepaint;
 820
 821     if (changeRequiresRecompositeLayer(other, changedContextSensitiveProperties))
 822         return StyleDifferenceRecompositeLayer;
 823
 824     if (changeRequiresRepaintIfTextOrBorderOrOutline(other, changedContextSensitiveProperties))
 825         return StyleDifferenceRepaintIfTextOrBorderOrOutline;
 826
 827     // Cursors are not checked, since they will be set appropriately in response to mouse events,
 828     // so they don't need to cause any repaint or layout.
 829
 830     // Animations don't need to be checked either.  We always set the new style on the RenderObject, so we will get a chance to fire off
 831     // the resulting transition properly.
 832     return StyleDifferenceEqual;
 833 }
 834
 835 bool RenderStyle::diffRequiresLayerRepaint(const RenderStyle& style, bool isComposited) const
 836 {
 837     unsigned changedContextSensitiveProperties = 0;
 838
 839     if (changeRequiresRepaint(style, changedContextSensitiveProperties))
 840         return true;
 841
 842     if (isComposited && changeRequiresLayerRepaint(style, changedContextSensitiveProperties))
 843         return changedContextSensitiveProperties & ContextSensitivePropertyClipRect;
 844
 845     return false;
 846 }
 847
 848 void RenderStyle::setMaskImage(const Vector<RefPtr<MaskImageOperation>>& ops)
 849 {
 850     FillLayer* curLayer = &rareNonInheritedData.access()->m_mask;
 851     while (curLayer) {
 852         curLayer->setMaskImage(nullptr);
 853         curLayer = curLayer->next();
 854     }
 855
 856     curLayer = &rareNonInheritedData.access()->m_mask;
 857     FillLayer* prevLayer = nullptr;
 858     for (auto& maskImage : ops) {
 859         if (!curLayer) {
 860             prevLayer->setNext(std::make_unique<FillLayer>(MaskFillLayer));
 861             curLayer = prevLayer->next();
 862         }
 863
 864         curLayer->setMaskImage(maskImage);
 865         prevLayer = curLayer;
 866         curLayer = curLayer->next();
 867     }
 868 }
 869
 870 void RenderStyle::setClip(Length top, Length right, Length bottom, Length left)
 871 {
 872     StyleVisualData* data = visual.access();
 873     data->clip.m_top = top;
 874     data->clip.m_right = right;
 875     data->clip.m_bottom = bottom;
 876     data->clip.m_left = left;
 877 }
 878
 879 void RenderStyle::addCursor(PassRefPtr<StyleImage> image, const IntPoint& hotSpot)
 880 {
 881     if (!rareInheritedData.access()->cursorData)
 882         rareInheritedData.access()->cursorData = CursorList::create();
 883     rareInheritedData.access()->cursorData->append(CursorData(image, hotSpot));
 884 }
 885
 886 void RenderStyle::setCursorList(PassRefPtr<CursorList> other)
 887 {
 888     rareInheritedData.access()->cursorData = other;
 889 }
 890
 891 void RenderStyle::setQuotes(PassRefPtr<QuotesData> q)
 892 {
 893     if (rareInheritedData->quotes == q || (rareInheritedData->quotes && q && *rareInheritedData->quotes == *q))
 894         return;
 895
 896     rareInheritedData.access()->quotes = q;
 897 }
 898
 899 void RenderStyle::clearCursorList()
 900 {
 901     if (rareInheritedData->cursorData)
 902         rareInheritedData.access()->cursorData = 0;
 903 }
 904
 905 void RenderStyle::clearContent()
 906 {
 907     if (rareNonInheritedData->m_content)
 908         rareNonInheritedData.access()->m_content = nullptr;
 909 }
 910
 911 void RenderStyle::appendContent(std::unique_ptr<ContentData> contentData)
 912 {
 913     auto& content = rareNonInheritedData.access()->m_content;
 914     ContentData* lastContent = content.get();
 915     while (lastContent && lastContent->next())
 916         lastContent = lastContent->next();
 917
 918     if (lastContent)
 919         lastContent->setNext(WTF::move(contentData));
 920     else
 921         content = WTF::move(contentData);
 922 }
 923
 924 void RenderStyle::setContent(PassRefPtr<StyleImage> image, bool add)
 925 {
 926     if (!image)
 927         return;
 928
 929     if (add) {
 930         appendContent(std::make_unique<ImageContentData>(image));
 931         return;
 932     }
 933
 934     rareNonInheritedData.access()->m_content = std::make_unique<ImageContentData>(image);
 935     if (!rareNonInheritedData.access()->m_altText.isNull())
 936         rareNonInheritedData.access()->m_content->setAltText(rareNonInheritedData.access()->m_altText);
 937 }
 938
 939 void RenderStyle::setContent(const String& string, bool add)
 940 {
 941     auto& content = rareNonInheritedData.access()->m_content;
 942     if (add) {
 943         ContentData* lastContent = content.get();
 944         while (lastContent && lastContent->next())
 945             lastContent = lastContent->next();
 946
 947         if (lastContent) {
 948             // We attempt to merge with the last ContentData if possible.
 949             if (is<TextContentData>(*lastContent)) {
 950                 TextContentData& textContent = downcast<TextContentData>(*lastContent);
 951                 textContent.setText(textContent.text() + string);
 952             } else
 953                 lastContent->setNext(std::make_unique<TextContentData>(string));
 954
 955             if (!rareNonInheritedData.access()->m_altText.isNull())
 956                 lastContent->setAltText(rareNonInheritedData.access()->m_altText);
 957             return;
 958         }
 959     }
 960
 961     content = std::make_unique<TextContentData>(string);
 962     if (!rareNonInheritedData.access()->m_altText.isNull())
 963         content->setAltText(rareNonInheritedData.access()->m_altText);
 964 }
 965
 966 void RenderStyle::setContent(std::unique_ptr<CounterContent> counter, bool add)
 967 {
 968     if (!counter)
 969         return;
 970
 971     if (add) {
 972         appendContent(std::make_unique<CounterContentData>(WTF::move(counter)));
 973         return;
 974     }
 975
 976     rareNonInheritedData.access()->m_content = std::make_unique<CounterContentData>(WTF::move(counter));
 977 }
 978
 979 void RenderStyle::setContent(QuoteType quote, bool add)
 980 {
 981     if (add) {
 982         appendContent(std::make_unique<QuoteContentData>(quote));
 983         return;
 984     }
 985
 986     rareNonInheritedData.access()->m_content = std::make_unique<QuoteContentData>(quote);
 987 }
 988
 989 void RenderStyle::setContentAltText(const String& string)
 990 {
 991     rareNonInheritedData.access()->m_altText = string;
 992
 993     if (rareNonInheritedData.access()->m_content)
 994         rareNonInheritedData.access()->m_content->setAltText(string);
 995 }
 996
 997 const String& RenderStyle::contentAltText() const
 998 {
 999     return rareNonInheritedData->m_altText;
1000 }
1001
1002 // FIXME: use affectedByTransformOrigin().
1003 static inline bool requireTransformOrigin(const Vector<RefPtr<TransformOperation>>& transformOperations, RenderStyle::ApplyTransformOrigin applyOrigin)
1004 {
1005     // transform-origin brackets the transform with translate operations.
1006     // Optimize for the case where the only transform is a translation, since the transform-origin is irrelevant
1007     // in that case.
1008     if (applyOrigin != RenderStyle::IncludeTransformOrigin)
1009         return false;
1010
1011     for (auto& operation : transformOperations) {
1012         TransformOperation::OperationType type = operation->type();
1013         if (type != TransformOperation::TRANSLATE_X
1014             && type != TransformOperation::TRANSLATE_Y
1015             && type != TransformOperation::TRANSLATE
1016             && type != TransformOperation::TRANSLATE_Z
1017             && type != TransformOperation::TRANSLATE_3D)
1018             return true;
1019     }
1020
1021     return false;
1022 }
1023
1024 void RenderStyle::applyTransform(TransformationMatrix& transform, const FloatRect& boundingBox, ApplyTransformOrigin applyOrigin) const
1025 {
1026     auto& operations = rareNonInheritedData->m_transform->m_operations.operations();
1027     bool applyTransformOrigin = requireTransformOrigin(operations, applyOrigin);
1028
1029     float offsetX = transformOriginX().isPercentNotCalculated() ? boundingBox.x() : 0;
1030     float offsetY = transformOriginY().isPercentNotCalculated() ? boundingBox.y() : 0;
1031
1032     if (applyTransformOrigin) {
1033         transform.translate3d(floatValueForLength(transformOriginX(), boundingBox.width()) + offsetX,
1034                               floatValueForLength(transformOriginY(), boundingBox.height()) + offsetY,
1035                               transformOriginZ());
1036     }
1037
1038     for (auto& operation : operations)
1039         operation->apply(transform, boundingBox.size());
1040
1041     if (applyTransformOrigin) {
1042         transform.translate3d(-floatValueForLength(transformOriginX(), boundingBox.width()) - offsetX,
1043                               -floatValueForLength(transformOriginY(), boundingBox.height()) - offsetY,
1044                               -transformOriginZ());
1045     }
1046 }
1047
1048 void RenderStyle::setPageScaleTransform(float scale)
1049 {
1050     if (scale == 1)
1051         return;
1052     TransformOperations transform;
1053     transform.operations().append(ScaleTransformOperation::create(scale, scale, ScaleTransformOperation::SCALE));
1054     setTransform(transform);
1055     setTransformOriginX(Length(0, Fixed));
1056     setTransformOriginY(Length(0, Fixed));
1057 }
1058
1059 void RenderStyle::setTextShadow(std::unique_ptr<ShadowData> shadowData, bool add)
1060 {
1061     ASSERT(!shadowData || (!shadowData->spread() && shadowData->style() == Normal));
1062
1063     StyleRareInheritedData* rareData = rareInheritedData.access();
1064     if (!add) {
1065         rareData->textShadow = WTF::move(shadowData);
1066         return;
1067     }
1068
1069     shadowData->setNext(WTF::move(rareData->textShadow));
1070     rareData->textShadow = WTF::move(shadowData);
1071 }
1072
1073 void RenderStyle::setBoxShadow(std::unique_ptr<ShadowData> shadowData, bool add)
1074 {
1075     StyleRareNonInheritedData* rareData = rareNonInheritedData.access();
1076     if (!add) {
1077         rareData->m_boxShadow = WTF::move(shadowData);
1078         return;
1079     }
1080
1081     shadowData->setNext(WTF::move(rareData->m_boxShadow));
1082     rareData->m_boxShadow = WTF::move(shadowData);
1083 }
1084
1085 static RoundedRect::Radii calcRadiiFor(const BorderData& border, const LayoutSize& size)
1086 {
1087     return RoundedRect::Radii(
1088         LayoutSize(valueForLength(border.topLeft().width(), size.width()),
1089             valueForLength(border.topLeft().height(), size.height())),
1090         LayoutSize(valueForLength(border.topRight().width(), size.width()),
1091             valueForLength(border.topRight().height(), size.height())),
1092         LayoutSize(valueForLength(border.bottomLeft().width(), size.width()),
1093             valueForLength(border.bottomLeft().height(), size.height())),
1094         LayoutSize(valueForLength(border.bottomRight().width(), size.width()),
1095             valueForLength(border.bottomRight().height(), size.height())));
1096 }
1097
1098 StyleImage* RenderStyle::listStyleImage() const { return rareInheritedData->listStyleImage.get(); }
1099 void RenderStyle::setListStyleImage(PassRefPtr<StyleImage> v)
1100 {
1101     if (rareInheritedData->listStyleImage != v)
1102         rareInheritedData.access()->listStyleImage = v;
1103 }
1104
1105 Color RenderStyle::color() const { return inherited->color; }
1106 Color RenderStyle::visitedLinkColor() const { return inherited->visitedLinkColor; }
1107 void RenderStyle::setColor(const Color& v) { SET_VAR(inherited, color, v); }
1108 void RenderStyle::setVisitedLinkColor(const Color& v) { SET_VAR(inherited, visitedLinkColor, v); }
1109
1110 short RenderStyle::horizontalBorderSpacing() const { return inherited->horizontal_border_spacing; }
1111 short RenderStyle::verticalBorderSpacing() const { return inherited->vertical_border_spacing; }
1112 void RenderStyle::setHorizontalBorderSpacing(short v) { SET_VAR(inherited, horizontal_border_spacing, v); }
1113 void RenderStyle::setVerticalBorderSpacing(short v) { SET_VAR(inherited, vertical_border_spacing, v); }
1114
1115 RoundedRect RenderStyle::getRoundedBorderFor(const LayoutRect& borderRect, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
1116 {
1117     RoundedRect roundedRect(borderRect);
1118     if (hasBorderRadius()) {
1119         RoundedRect::Radii radii = calcRadiiFor(surround->border, borderRect.size());
1120         radii.scale(calcBorderRadiiConstraintScaleFor(borderRect, radii));
1121         roundedRect.includeLogicalEdges(radii, isHorizontalWritingMode(), includeLogicalLeftEdge, includeLogicalRightEdge);
1122     }
1123     return roundedRect;
1124 }
1125
1126 RoundedRect RenderStyle::getRoundedInnerBorderFor(const LayoutRect& borderRect, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
1127 {
1128     bool horizontal = isHorizontalWritingMode();
1129
1130     LayoutUnit leftWidth = (!horizontal || includeLogicalLeftEdge) ? borderLeftWidth() : 0;
1131     LayoutUnit rightWidth = (!horizontal || includeLogicalRightEdge) ? borderRightWidth() : 0;
1132     LayoutUnit topWidth = (horizontal || includeLogicalLeftEdge) ? borderTopWidth() : 0;
1133     LayoutUnit bottomWidth = (horizontal || includeLogicalRightEdge) ? borderBottomWidth() : 0;
1134
1135     return getRoundedInnerBorderFor(borderRect, topWidth, bottomWidth, leftWidth, rightWidth, includeLogicalLeftEdge, includeLogicalRightEdge);
1136 }
1137
1138 RoundedRect RenderStyle::getRoundedInnerBorderFor(const LayoutRect& borderRect, LayoutUnit topWidth, LayoutUnit bottomWidth,
1139     LayoutUnit leftWidth, LayoutUnit rightWidth, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
1140 {
1141     LayoutRect innerRect(borderRect.x() + leftWidth,
1142                borderRect.y() + topWidth,
1143                borderRect.width() - leftWidth - rightWidth,
1144                borderRect.height() - topWidth - bottomWidth);
1145
1146     RoundedRect roundedRect(innerRect);
1147
1148     if (hasBorderRadius()) {
1149         RoundedRect::Radii radii = getRoundedBorderFor(borderRect).radii();
1150         radii.shrink(topWidth, bottomWidth, leftWidth, rightWidth);
1151         roundedRect.includeLogicalEdges(radii, isHorizontalWritingMode(), includeLogicalLeftEdge, includeLogicalRightEdge);
1152     }
1153     return roundedRect;
1154 }
1155
1156 static bool allLayersAreFixed(const FillLayer* layer)
1157 {
1158     bool allFixed = true;
1159
1160     for (const FillLayer* currLayer = layer; currLayer; currLayer = currLayer->next())
1161         allFixed &= (currLayer->image() && currLayer->attachment() == FixedBackgroundAttachment);
1162
1163     return layer && allFixed;
1164 }
1165
1166 bool RenderStyle::hasEntirelyFixedBackground() const
1167 {
1168     return allLayersAreFixed(backgroundLayers());
1169 }
1170
1171 const CounterDirectiveMap* RenderStyle::counterDirectives() const
1172 {
1173     return rareNonInheritedData->m_counterDirectives.get();
1174 }
1175
1176 CounterDirectiveMap& RenderStyle::accessCounterDirectives()
1177 {
1178     auto& map = rareNonInheritedData.access()->m_counterDirectives;
1179     if (!map)
1180         map = std::make_unique<CounterDirectiveMap>();
1181     return *map;
1182 }
1183
1184 const CounterDirectives RenderStyle::getCounterDirectives(const AtomicString& identifier) const
1185 {
1186     if (const CounterDirectiveMap* directives = counterDirectives())
1187         return directives->get(identifier);
1188     return CounterDirectives();
1189 }
1190
1191 const AtomicString& RenderStyle::hyphenString() const
1192 {
1193     ASSERT(hyphens() != HyphensNone);
1194
1195     const AtomicString& hyphenationString = rareInheritedData.get()->hyphenationString;
1196     if (!hyphenationString.isNull())
1197         return hyphenationString;
1198
1199     // FIXME: This should depend on locale.
1200     DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, hyphenMinusString, (&hyphenMinus, 1));
1201     DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, hyphenString, (&hyphen, 1));
1202     return fontCascade().primaryFont().glyphForCharacter(hyphen) ? hyphenString : hyphenMinusString;
1203 }
1204
1205 const AtomicString& RenderStyle::textEmphasisMarkString() const
1206 {
1207     switch (textEmphasisMark()) {
1208     case TextEmphasisMarkNone:
1209         return nullAtom;
1210     case TextEmphasisMarkCustom:
1211         return textEmphasisCustomMark();
1212     case TextEmphasisMarkDot: {
1213         DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, filledDotString, (&bullet, 1));
1214         DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, openDotString, (&whiteBullet, 1));
1215         return textEmphasisFill() == TextEmphasisFillFilled ? filledDotString : openDotString;
1216     }
1217     case TextEmphasisMarkCircle: {
1218         DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, filledCircleString, (&blackCircle, 1));
1219         DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, openCircleString, (&whiteCircle, 1));
1220         return textEmphasisFill() == TextEmphasisFillFilled ? filledCircleString : openCircleString;
1221     }
1222     case TextEmphasisMarkDoubleCircle: {
1223         DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, filledDoubleCircleString, (&fisheye, 1));
1224         DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, openDoubleCircleString, (&bullseye, 1));
1225         return textEmphasisFill() == TextEmphasisFillFilled ? filledDoubleCircleString : openDoubleCircleString;
1226     }
1227     case TextEmphasisMarkTriangle: {
1228         DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, filledTriangleString, (&blackUpPointingTriangle, 1));
1229         DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, openTriangleString, (&whiteUpPointingTriangle, 1));
1230         return textEmphasisFill() == TextEmphasisFillFilled ? filledTriangleString : openTriangleString;
1231     }
1232     case TextEmphasisMarkSesame: {
1233         DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, filledSesameString, (&sesameDot, 1));
1234         DEPRECATED_DEFINE_STATIC_LOCAL(AtomicString, openSesameString, (&whiteSesameDot, 1));
1235         return textEmphasisFill() == TextEmphasisFillFilled ? filledSesameString : openSesameString;
1236     }
1237     case TextEmphasisMarkAuto:
1238         ASSERT_NOT_REACHED();
1239         return nullAtom;
1240     }
1241
1242     ASSERT_NOT_REACHED();
1243     return nullAtom;
1244 }
1245
1246 #if ENABLE(DASHBOARD_SUPPORT)
1247 const Vector<StyleDashboardRegion>& RenderStyle::initialDashboardRegions()
1248 {
1249     DEPRECATED_DEFINE_STATIC_LOCAL(Vector<StyleDashboardRegion>, emptyList, ());
1250     return emptyList;
1251 }
1252
1253 const Vector<StyleDashboardRegion>& RenderStyle::noneDashboardRegions()
1254 {
1255     DEPRECATED_DEFINE_STATIC_LOCAL(Vector<StyleDashboardRegion>, noneList, ());
1256     static bool noneListInitialized = false;
1257
1258     if (!noneListInitialized) {
1259         StyleDashboardRegion region;
1260         region.label = "";
1261         region.offset.m_top  = Length();
1262         region.offset.m_right = Length();
1263         region.offset.m_bottom = Length();
1264         region.offset.m_left = Length();
1265         region.type = StyleDashboardRegion::None;
1266         noneList.append(region);
1267         noneListInitialized = true;
1268     }
1269     return noneList;
1270 }
1271 #endif
1272
1273 void RenderStyle::adjustAnimations()
1274 {
1275     AnimationList* animationList = rareNonInheritedData->m_animations.get();
1276     if (!animationList)
1277         return;
1278
1279     // Get rid of empty animations and anything beyond them
1280     for (size_t i = 0; i < animationList->size(); ++i) {
1281         if (animationList->animation(i).isEmpty()) {
1282             animationList->resize(i);
1283             break;
1284         }
1285     }
1286
1287     if (animationList->isEmpty()) {
1288         clearAnimations();
1289         return;
1290     }
1291
1292     // Repeat patterns into layers that don't have some properties set.
1293     animationList->fillUnsetProperties();
1294 }
1295
1296 void RenderStyle::adjustTransitions()
1297 {
1298     AnimationList* transitionList = rareNonInheritedData->m_transitions.get();
1299     if (!transitionList)
1300         return;
1301
1302     // Get rid of empty transitions and anything beyond them
1303     for (size_t i = 0; i < transitionList->size(); ++i) {
1304         if (transitionList->animation(i).isEmpty()) {
1305             transitionList->resize(i);
1306             break;
1307         }
1308     }
1309
1310     if (transitionList->isEmpty()) {
1311         clearTransitions();
1312         return;
1313     }
1314
1315     // Repeat patterns into layers that don't have some properties set.
1316     transitionList->fillUnsetProperties();
1317
1318     // Make sure there are no duplicate properties. This is an O(n^2) algorithm
1319     // but the lists tend to be very short, so it is probably ok
1320     for (size_t i = 0; i < transitionList->size(); ++i) {
1321         for (size_t j = i+1; j < transitionList->size(); ++j) {
1322             if (transitionList->animation(i).property() == transitionList->animation(j).property()) {
1323                 // toss i
1324                 transitionList->remove(i);
1325                 j = i;
1326             }
1327         }
1328     }
1329 }
1330
1331 AnimationList& RenderStyle::ensureAnimations()
1332 {
1333     if (!rareNonInheritedData.access()->m_animations)
1334         rareNonInheritedData.access()->m_animations = std::make_unique<AnimationList>();
1335     return *rareNonInheritedData->m_animations;
1336 }
1337
1338 AnimationList& RenderStyle::ensureTransitions()
1339 {
1340     if (!rareNonInheritedData.access()->m_transitions)
1341         rareNonInheritedData.access()->m_transitions = std::make_unique<AnimationList>();
1342     return *rareNonInheritedData->m_transitions;
1343 }
1344
1345 const Animation* RenderStyle::transitionForProperty(CSSPropertyID property) const
1346 {
1347     if (transitions()) {
1348         for (size_t i = 0; i < transitions()->size(); ++i) {
1349             const Animation& p = transitions()->animation(i);
1350             if (p.animationMode() == Animation::AnimateAll || p.property() == property) {
1351                 return &p;
1352             }
1353         }
1354     }
1355     return 0;
1356 }
1357
1358 const FontCascade& RenderStyle::fontCascade() const { return inherited->fontCascade; }
1359 const FontMetrics& RenderStyle::fontMetrics() const { return inherited->fontCascade.fontMetrics(); }
1360 const FontDescription& RenderStyle::fontDescription() const { return inherited->fontCascade.fontDescription(); }
1361 float RenderStyle::specifiedFontSize() const { return fontDescription().specifiedSize(); }
1362 float RenderStyle::computedFontSize() const { return fontDescription().computedSize(); }
1363 int RenderStyle::fontSize() const { return inherited->fontCascade.pixelSize(); }
1364
1365 const Length& RenderStyle::wordSpacing() const { return rareInheritedData->wordSpacing; }
1366 float RenderStyle::letterSpacing() const { return inherited->fontCascade.letterSpacing(); }
1367
1368 bool RenderStyle::setFontDescription(const FontDescription& v)
1369 {
1370     if (inherited->fontCascade.fontDescription() != v) {
1371         inherited.access()->fontCascade = FontCascade(v, inherited->fontCascade.letterSpacing(), inherited->fontCascade.wordSpacing());
1372         return true;
1373     }
1374     return false;
1375 }
1376
1377 #if ENABLE(IOS_TEXT_AUTOSIZING)
1378 const Length& RenderStyle::specifiedLineHeight() const { return inherited->specifiedLineHeight; }
1379 void RenderStyle::setSpecifiedLineHeight(Length v) { SET_VAR(inherited, specifiedLineHeight, v); }
1380 #else
1381 const Length& RenderStyle::specifiedLineHeight() const { return inherited->line_height; }
1382 #endif
1383
1384 Length RenderStyle::lineHeight() const
1385 {
1386     const Length& lh = inherited->line_height;
1387 #if ENABLE(TEXT_AUTOSIZING)
1388     // Unlike fontDescription().computedSize() and hence fontSize(), this is
1389     // recalculated on demand as we only store the specified line height.
1390     // FIXME: Should consider scaling the fixed part of any calc expressions
1391     // too, though this involves messily poking into CalcExpressionLength.
1392     float multiplier = textAutosizingMultiplier();
1393     if (multiplier > 1 && lh.isFixed())
1394         return Length(TextAutosizer::computeAutosizedFontSize(lh.value(), multiplier), Fixed);
1395 #endif
1396     return lh;
1397 }
1398 void RenderStyle::setLineHeight(Length specifiedLineHeight) { SET_VAR(inherited, line_height, specifiedLineHeight); }
1399
1400 int RenderStyle::computedLineHeight() const
1401 {
1402     const Length& lh = lineHeight();
1403
1404     // Negative value means the line height is not set. Use the font's built-in spacing.
1405     if (lh.isNegative())
1406         return fontMetrics().lineSpacing();
1407
1408     if (lh.isPercent())
1409         return minimumValueForLength(lh, fontSize());
1410
1411     return lh.value();
1412 }
1413
1414 void RenderStyle::setWordSpacing(Length value)
1415 {
1416     float fontWordSpacing;
1417     switch (value.type()) {
1418     case Auto:
1419         fontWordSpacing = 0;
1420         break;
1421     case Percent:
1422         fontWordSpacing = value.percent() * fontCascade().spaceWidth() / 100;
1423         break;
1424     case Fixed:
1425         fontWordSpacing = value.value();
1426         break;
1427     case Calculated:
1428         fontWordSpacing = value.nonNanCalculatedValue(maxValueForCssLength);
1429         break;
1430     default:
1431         ASSERT_NOT_REACHED();
1432         fontWordSpacing = 0;
1433         break;
1434     }
1435     inherited.access()->fontCascade.setWordSpacing(fontWordSpacing);
1436     rareInheritedData.access()->wordSpacing = WTF::move(value);
1437 }
1438
1439 void RenderStyle::setLetterSpacing(float v) { inherited.access()->fontCascade.setLetterSpacing(v); }
1440
1441 void RenderStyle::setFontSize(float size)
1442 {
1443     // size must be specifiedSize if Text Autosizing is enabled, but computedSize if text
1444     // zoom is enabled (if neither is enabled it's irrelevant as they're probably the same).
1445
1446     ASSERT(std::isfinite(size));
1447     if (!std::isfinite(size) || size < 0)
1448         size = 0;
1449     else
1450         size = std::min(maximumAllowedFontSize, size);
1451
1452     FontSelector* currentFontSelector = fontCascade().fontSelector();
1453     FontDescription desc(fontDescription());
1454     desc.setSpecifiedSize(size);
1455     desc.setComputedSize(size);
1456
1457 #if ENABLE(TEXT_AUTOSIZING)
1458     float multiplier = textAutosizingMultiplier();
1459     if (multiplier > 1) {
1460         float autosizedFontSize = TextAutosizer::computeAutosizedFontSize(size, multiplier);
1461         desc.setComputedSize(min(maximumAllowedFontSize, autosizedFontSize));
1462     }
1463 #endif
1464
1465     setFontDescription(desc);
1466     fontCascade().update(currentFontSelector);
1467 }
1468
1469 void RenderStyle::getShadowExtent(const ShadowData* shadow, LayoutUnit &top, LayoutUnit &right, LayoutUnit &bottom, LayoutUnit &left) const
1470 {
1471     top = 0;
1472     right = 0;
1473     bottom = 0;
1474     left = 0;
1475
1476     for ( ; shadow; shadow = shadow->next()) {
1477         if (shadow->style() == Inset)
1478             continue;
1479
1480         int extentAndSpread = shadow->paintingExtent() + shadow->spread();
1481         top = std::min<LayoutUnit>(top, shadow->y() - extentAndSpread);
1482         right = std::max<LayoutUnit>(right, shadow->x() + extentAndSpread);
1483         bottom = std::max<LayoutUnit>(bottom, shadow->y() + extentAndSpread);
1484         left = std::min<LayoutUnit>(left, shadow->x() - extentAndSpread);
1485     }
1486 }
1487
1488 LayoutBoxExtent RenderStyle::getShadowInsetExtent(const ShadowData* shadow) const
1489 {
1490     LayoutUnit top = 0;
1491     LayoutUnit right = 0;
1492     LayoutUnit bottom = 0;
1493     LayoutUnit left = 0;
1494
1495     for ( ; shadow; shadow = shadow->next()) {
1496         if (shadow->style() == Normal)
1497             continue;
1498
1499         int extentAndSpread = shadow->paintingExtent() + shadow->spread();
1500         top = std::max<LayoutUnit>(top, shadow->y() + extentAndSpread);
1501         right = std::min<LayoutUnit>(right, shadow->x() - extentAndSpread);
1502         bottom = std::min<LayoutUnit>(bottom, shadow->y() - extentAndSpread);
1503         left = std::max<LayoutUnit>(left, shadow->x() + extentAndSpread);
1504     }
1505
1506     return LayoutBoxExtent(top, right, bottom, left);
1507 }
1508
1509 void RenderStyle::getShadowHorizontalExtent(const ShadowData* shadow, LayoutUnit &left, LayoutUnit &right) const
1510 {
1511     left = 0;
1512     right = 0;
1513
1514     for ( ; shadow; shadow = shadow->next()) {
1515         if (shadow->style() == Inset)
1516             continue;
1517
1518         int extentAndSpread = shadow->paintingExtent() + shadow->spread();
1519         left = std::min<LayoutUnit>(left, shadow->x() - extentAndSpread);
1520         right = std::max<LayoutUnit>(right, shadow->x() + extentAndSpread);
1521     }
1522 }
1523
1524 void RenderStyle::getShadowVerticalExtent(const ShadowData* shadow, LayoutUnit &top, LayoutUnit &bottom) const
1525 {
1526     top = 0;
1527     bottom = 0;
1528
1529     for ( ; shadow; shadow = shadow->next()) {
1530         if (shadow->style() == Inset)
1531             continue;
1532
1533         int extentAndSpread = shadow->paintingExtent() + shadow->spread();
1534         top = std::min<LayoutUnit>(top, shadow->y() - extentAndSpread);
1535         bottom = std::max<LayoutUnit>(bottom, shadow->y() + extentAndSpread);
1536     }
1537 }
1538
1539 Color RenderStyle::colorIncludingFallback(int colorProperty, bool visitedLink) const
1540 {
1541     Color result;
1542     EBorderStyle borderStyle = BNONE;
1543     switch (colorProperty) {
1544     case CSSPropertyBackgroundColor:
1545         return visitedLink ? visitedLinkBackgroundColor() : backgroundColor(); // Background color doesn't fall back.
1546     case CSSPropertyBorderLeftColor:
1547         result = visitedLink ? visitedLinkBorderLeftColor() : borderLeftColor();
1548         borderStyle = borderLeftStyle();
1549         break;
1550     case CSSPropertyBorderRightColor:
1551         result = visitedLink ? visitedLinkBorderRightColor() : borderRightColor();
1552         borderStyle = borderRightStyle();
1553         break;
1554     case CSSPropertyBorderTopColor:
1555         result = visitedLink ? visitedLinkBorderTopColor() : borderTopColor();
1556         borderStyle = borderTopStyle();
1557         break;
1558     case CSSPropertyBorderBottomColor:
1559         result = visitedLink ? visitedLinkBorderBottomColor() : borderBottomColor();
1560         borderStyle = borderBottomStyle();
1561         break;
1562     case CSSPropertyColor:
1563         result = visitedLink ? visitedLinkColor() : color();
1564         break;
1565     case CSSPropertyOutlineColor:
1566         result = visitedLink ? visitedLinkOutlineColor() : outlineColor();
1567         break;
1568     case CSSPropertyColumnRuleColor:
1569         result = visitedLink ? visitedLinkColumnRuleColor() : columnRuleColor();
1570         break;
1571     case CSSPropertyWebkitTextDecorationColor:
1572         // Text decoration color fallback is handled in RenderObject::decorationColor.
1573         return visitedLink ? visitedLinkTextDecorationColor() : textDecorationColor();
1574     case CSSPropertyWebkitTextEmphasisColor:
1575         result = visitedLink ? visitedLinkTextEmphasisColor() : textEmphasisColor();
1576         break;
1577     case CSSPropertyWebkitTextFillColor:
1578         result = visitedLink ? visitedLinkTextFillColor() : textFillColor();
1579         break;
1580     case CSSPropertyWebkitTextStrokeColor:
1581         result = visitedLink ? visitedLinkTextStrokeColor() : textStrokeColor();
1582         break;
1583     default:
1584         ASSERT_NOT_REACHED();
1585         break;
1586     }
1587
1588     if (!result.isValid()) {
1589         if (!visitedLink && (borderStyle == INSET || borderStyle == OUTSET || borderStyle == RIDGE || borderStyle == GROOVE))
1590             result.setRGB(238, 238, 238);
1591         else
1592             result = visitedLink ? visitedLinkColor() : color();
1593     }
1594     return result;
1595 }
1596
1597 Color RenderStyle::visitedDependentColor(int colorProperty) const
1598 {
1599     Color unvisitedColor = colorIncludingFallback(colorProperty, false);
1600     if (insideLink() != InsideVisitedLink)
1601         return unvisitedColor;
1602
1603     Color visitedColor = colorIncludingFallback(colorProperty, true);
1604
1605     // Text decoration color validity is preserved (checked in RenderObject::decorationColor).
1606     if (colorProperty == CSSPropertyWebkitTextDecorationColor)
1607         return visitedColor;
1608
1609     // FIXME: Technically someone could explicitly specify the color transparent, but for now we'll just
1610     // assume that if the background color is transparent that it wasn't set. Note that it's weird that
1611     // we're returning unvisited info for a visited link, but given our restriction that the alpha values
1612     // have to match, it makes more sense to return the unvisited background color if specified than it
1613     // does to return black. This behavior matches what Firefox 4 does as well.
1614     if (colorProperty == CSSPropertyBackgroundColor && visitedColor == Color::transparent)
1615         return unvisitedColor;
1616
1617     // Take the alpha from the unvisited color, but get the RGB values from the visited color.
1618     return Color(visitedColor.red(), visitedColor.green(), visitedColor.blue(), unvisitedColor.alpha());
1619 }
1620
1621 const BorderValue& RenderStyle::borderBefore() const
1622 {
1623     switch (writingMode()) {
1624     case TopToBottomWritingMode:
1625         return borderTop();
1626     case BottomToTopWritingMode:
1627         return borderBottom();
1628     case LeftToRightWritingMode:
1629         return borderLeft();
1630     case RightToLeftWritingMode:
1631         return borderRight();
1632     }
1633     ASSERT_NOT_REACHED();
1634     return borderTop();
1635 }
1636
1637 const BorderValue& RenderStyle::borderAfter() const
1638 {
1639     switch (writingMode()) {
1640     case TopToBottomWritingMode:
1641         return borderBottom();
1642     case BottomToTopWritingMode:
1643         return borderTop();
1644     case LeftToRightWritingMode:
1645         return borderRight();
1646     case RightToLeftWritingMode:
1647         return borderLeft();
1648     }
1649     ASSERT_NOT_REACHED();
1650     return borderBottom();
1651 }
1652
1653 const BorderValue& RenderStyle::borderStart() const
1654 {
1655     if (isHorizontalWritingMode())
1656         return isLeftToRightDirection() ? borderLeft() : borderRight();
1657     return isLeftToRightDirection() ? borderTop() : borderBottom();
1658 }
1659
1660 const BorderValue& RenderStyle::borderEnd() const
1661 {
1662     if (isHorizontalWritingMode())
1663         return isLeftToRightDirection() ? borderRight() : borderLeft();
1664     return isLeftToRightDirection() ? borderBottom() : borderTop();
1665 }
1666
1667 float RenderStyle::borderBeforeWidth() const
1668 {
1669     switch (writingMode()) {
1670     case TopToBottomWritingMode:
1671         return borderTopWidth();
1672     case BottomToTopWritingMode:
1673         return borderBottomWidth();
1674     case LeftToRightWritingMode:
1675         return borderLeftWidth();
1676     case RightToLeftWritingMode:
1677         return borderRightWidth();
1678     }
1679     ASSERT_NOT_REACHED();
1680     return borderTopWidth();
1681 }
1682
1683 float RenderStyle::borderAfterWidth() const
1684 {
1685     switch (writingMode()) {
1686     case TopToBottomWritingMode:
1687         return borderBottomWidth();
1688     case BottomToTopWritingMode:
1689         return borderTopWidth();
1690     case LeftToRightWritingMode:
1691         return borderRightWidth();
1692     case RightToLeftWritingMode:
1693         return borderLeftWidth();
1694     }
1695     ASSERT_NOT_REACHED();
1696     return borderBottomWidth();
1697 }
1698
1699 float RenderStyle::borderStartWidth() const
1700 {
1701     if (isHorizontalWritingMode())
1702         return isLeftToRightDirection() ? borderLeftWidth() : borderRightWidth();
1703     return isLeftToRightDirection() ? borderTopWidth() : borderBottomWidth();
1704 }
1705
1706 float RenderStyle::borderEndWidth() const
1707 {
1708     if (isHorizontalWritingMode())
1709         return isLeftToRightDirection() ? borderRightWidth() : borderLeftWidth();
1710     return isLeftToRightDirection() ? borderBottomWidth() : borderTopWidth();
1711 }
1712
1713 void RenderStyle::setMarginStart(Length margin)
1714 {
1715     if (isHorizontalWritingMode()) {
1716         if (isLeftToRightDirection())
1717             setMarginLeft(margin);
1718         else
1719             setMarginRight(margin);
1720     } else {
1721         if (isLeftToRightDirection())
1722             setMarginTop(margin);
1723         else
1724             setMarginBottom(margin);
1725     }
1726 }
1727
1728 void RenderStyle::setMarginEnd(Length margin)
1729 {
1730     if (isHorizontalWritingMode()) {
1731         if (isLeftToRightDirection())
1732             setMarginRight(margin);
1733         else
1734             setMarginLeft(margin);
1735     } else {
1736         if (isLeftToRightDirection())
1737             setMarginBottom(margin);
1738         else
1739             setMarginTop(margin);
1740     }
1741 }
1742
1743 TextEmphasisMark RenderStyle::textEmphasisMark() const
1744 {
1745     TextEmphasisMark mark = static_cast<TextEmphasisMark>(rareInheritedData->textEmphasisMark);
1746     if (mark != TextEmphasisMarkAuto)
1747         return mark;
1748
1749     if (isHorizontalWritingMode())
1750         return TextEmphasisMarkDot;
1751
1752     return TextEmphasisMarkSesame;
1753 }
1754
1755 #if ENABLE(TOUCH_EVENTS)
1756 Color RenderStyle::initialTapHighlightColor()
1757 {
1758     return RenderTheme::tapHighlightColor();
1759 }
1760 #endif
1761
1762 LayoutBoxExtent RenderStyle::imageOutsets(const NinePieceImage& image) const
1763 {
1764     return LayoutBoxExtent(NinePieceImage::computeOutset(image.outset().top(), borderTopWidth()),
1765                            NinePieceImage::computeOutset(image.outset().right(), borderRightWidth()),
1766                            NinePieceImage::computeOutset(image.outset().bottom(), borderBottomWidth()),
1767                            NinePieceImage::computeOutset(image.outset().left(), borderLeftWidth()));
1768 }
1769
1770 void RenderStyle::getFontAndGlyphOrientation(FontOrientation& fontOrientation, NonCJKGlyphOrientation& glyphOrientation)
1771 {
1772     if (isHorizontalWritingMode()) {
1773         fontOrientation = Horizontal;
1774         glyphOrientation = NonCJKGlyphOrientationVerticalRight;
1775         return;
1776     }
1777
1778     switch (textOrientation()) {
1779     case TextOrientationVerticalRight:
1780         fontOrientation = Vertical;
1781         glyphOrientation = NonCJKGlyphOrientationVerticalRight;
1782         return;
1783     case TextOrientationUpright:
1784         fontOrientation = Vertical;
1785         glyphOrientation = NonCJKGlyphOrientationUpright;
1786         return;
1787     case TextOrientationSideways:
1788         if (writingMode() == LeftToRightWritingMode) {
1789             // FIXME: This should map to sideways-left, which is not supported yet.
1790             fontOrientation = Vertical;
1791             glyphOrientation = NonCJKGlyphOrientationVerticalRight;
1792             return;
1793         }
1794         fontOrientation = Horizontal;
1795         glyphOrientation = NonCJKGlyphOrientationVerticalRight;
1796         return;
1797     case TextOrientationSidewaysRight:
1798         fontOrientation = Horizontal;
1799         glyphOrientation = NonCJKGlyphOrientationVerticalRight;
1800         return;
1801     default:
1802         ASSERT_NOT_REACHED();
1803         fontOrientation = Horizontal;
1804         glyphOrientation = NonCJKGlyphOrientationVerticalRight;
1805         return;
1806     }
1807 }
1808
1809 void RenderStyle::setBorderImageSource(PassRefPtr<StyleImage> image)
1810 {
1811     if (surround->border.m_image.image() == image.get())
1812         return;
1813     surround.access()->border.m_image.setImage(image);
1814 }
1815
1816 void RenderStyle::setBorderImageSlices(LengthBox slices)
1817 {
1818     if (surround->border.m_image.imageSlices() == slices)
1819         return;
1820     surround.access()->border.m_image.setImageSlices(slices);
1821 }
1822
1823 void RenderStyle::setBorderImageWidth(LengthBox slices)
1824 {
1825     if (surround->border.m_image.borderSlices() == slices)
1826         return;
1827     surround.access()->border.m_image.setBorderSlices(slices);
1828 }
1829
1830 void RenderStyle::setBorderImageOutset(LengthBox outset)
1831 {
1832     if (surround->border.m_image.outset() == outset)
1833         return;
1834     surround.access()->border.m_image.setOutset(outset);
1835 }
1836
1837 void RenderStyle::setColumnStylesFromPaginationMode(const Pagination::Mode& paginationMode)
1838 {
1839     if (paginationMode == Pagination::Unpaginated)
1840         return;
1841
1842     setColumnFill(ColumnFillAuto);
1843
1844     switch (paginationMode) {
1845     case Pagination::LeftToRightPaginated:
1846         setColumnAxis(HorizontalColumnAxis);
1847         if (isHorizontalWritingMode())
1848             setColumnProgression(isLeftToRightDirection() ? NormalColumnProgression : ReverseColumnProgression);
1849         else
1850             setColumnProgression(isFlippedBlocksWritingMode() ? ReverseColumnProgression : NormalColumnProgression);
1851         break;
1852     case Pagination::RightToLeftPaginated:
1853         setColumnAxis(HorizontalColumnAxis);
1854         if (isHorizontalWritingMode())
1855             setColumnProgression(isLeftToRightDirection() ? ReverseColumnProgression : NormalColumnProgression);
1856         else
1857             setColumnProgression(isFlippedBlocksWritingMode() ? NormalColumnProgression : ReverseColumnProgression);
1858         break;
1859     case Pagination::TopToBottomPaginated:
1860         setColumnAxis(VerticalColumnAxis);
1861         if (isHorizontalWritingMode())
1862             setColumnProgression(isFlippedBlocksWritingMode() ? ReverseColumnProgression : NormalColumnProgression);
1863         else
1864             setColumnProgression(isLeftToRightDirection() ? NormalColumnProgression : ReverseColumnProgression);
1865         break;
1866     case Pagination::BottomToTopPaginated:
1867         setColumnAxis(VerticalColumnAxis);
1868         if (isHorizontalWritingMode())
1869             setColumnProgression(isFlippedBlocksWritingMode() ? NormalColumnProgression : ReverseColumnProgression);
1870         else
1871             setColumnProgression(isLeftToRightDirection() ? ReverseColumnProgression : NormalColumnProgression);
1872         break;
1873     case Pagination::Unpaginated:
1874         ASSERT_NOT_REACHED();
1875         break;
1876     }
1877 }
1878
1879 #if ENABLE(CSS_SCROLL_SNAP)
1880 LengthSize RenderStyle::initialScrollSnapDestination()
1881 {
1882     return defaultScrollSnapDestination();
1883 }
1884
1885 Vector<LengthSize> RenderStyle::initialScrollSnapCoordinates()
1886 {
1887     return Vector<LengthSize>();
1888 }
1889
1890 const ScrollSnapPoints* RenderStyle::scrollSnapPointsX() const
1891 {
1892     return rareNonInheritedData->m_scrollSnapPoints->xPoints.get();
1893 }
1894
1895 const ScrollSnapPoints* RenderStyle::scrollSnapPointsY() const
1896 {
1897     return rareNonInheritedData->m_scrollSnapPoints->yPoints.get();
1898 }
1899
1900 const LengthSize& RenderStyle::scrollSnapDestination() const
1901 {
1902     return rareNonInheritedData->m_scrollSnapPoints->destination;
1903 }
1904
1905 const Vector<LengthSize>& RenderStyle::scrollSnapCoordinates() const
1906 {
1907     return rareNonInheritedData->m_scrollSnapPoints->coordinates;
1908 }
1909
1910 void RenderStyle::setScrollSnapPointsX(std::unique_ptr<ScrollSnapPoints> points)
1911 {
1912     if (rareNonInheritedData->m_scrollSnapPoints->xPoints.get() == points.get())
1913         return;
1914     rareNonInheritedData.access()->m_scrollSnapPoints.access()->xPoints = WTF::move(points);
1915 }
1916
1917 void RenderStyle::setScrollSnapPointsY(std::unique_ptr<ScrollSnapPoints> points)
1918 {
1919     if (rareNonInheritedData->m_scrollSnapPoints->yPoints.get() == points.get())
1920         return;
1921     rareNonInheritedData.access()->m_scrollSnapPoints.access()->yPoints = WTF::move(points);
1922 }
1923
1924 void RenderStyle::setScrollSnapDestination(LengthSize destination)
1925 {
1926     if (rareNonInheritedData->m_scrollSnapPoints->destination == destination)
1927         return;
1928     rareNonInheritedData.access()->m_scrollSnapPoints.access()->destination = WTF::move(destination);
1929 }
1930
1931 void RenderStyle::setScrollSnapCoordinates(Vector<LengthSize> coordinates)
1932 {
1933     if (rareNonInheritedData->m_scrollSnapPoints->coordinates == coordinates)
1934         return;
1935     rareNonInheritedData.access()->m_scrollSnapPoints.access()->coordinates = WTF::move(coordinates);
1936 }
1937
1938 #endif
1939
1940 } // namespace WebCore