Source/WebCore/rendering/style/RenderStyle.cpp

   1 /*
   2  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
   3  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 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 "Font.h"
  30 #include "FontSelector.h"
  31 #include "QuotesData.h"
  32 #include "RenderArena.h"
  33 #include "RenderObject.h"
  34 #include "ScaleTransformOperation.h"
  35 #include "ShadowData.h"
  36 #include "StyleImage.h"
  37 #include "StyleInheritedData.h"
  38 #include "StyleResolver.h"
  39 #if ENABLE(TOUCH_EVENTS)
  40 #include "RenderTheme.h"
  41 #endif
  42 #include "WebCoreMemoryInstrumentation.h"
  43 #include <wtf/MathExtras.h>
  44 #include <wtf/MemoryInstrumentationVector.h>
  45 #include <wtf/MemoryObjectInfo.h>
  46 #include <wtf/StdLibExtras.h>
  47 #include <algorithm>
  48
  49 #if ENABLE(TEXT_AUTOSIZING)
  50 #include "TextAutosizer.h"
  51 #endif
  52
  53 using namespace std;
  54
  55 namespace WebCore {
  56
  57 struct SameSizeAsBorderValue {
  58     RGBA32 m_color;
  59     unsigned m_width;
  60 };
  61
  62 COMPILE_ASSERT(sizeof(BorderValue) == sizeof(SameSizeAsBorderValue), BorderValue_should_not_grow);
  63
  64 struct SameSizeAsRenderStyle : public RefCounted<SameSizeAsRenderStyle> {
  65     void* dataRefs[7];
  66     void* ownPtrs[1];
  67 #if ENABLE(SVG)
  68     void* dataRefSvgStyle;
  69 #endif
  70     struct InheritedFlags {
  71         unsigned m_bitfields[2];
  72     } inherited_flags;
  73
  74     struct NonInheritedFlags {
  75         unsigned m_bitfields[2];
  76     } noninherited_flags;
  77 };
  78
  79 COMPILE_ASSERT(sizeof(RenderStyle) == sizeof(SameSizeAsRenderStyle), RenderStyle_should_stay_small);
  80
  81 inline RenderStyle* defaultStyle()
  82 {
  83     static RenderStyle* s_defaultStyle = RenderStyle::createDefaultStyle().leakRef();
  84     return s_defaultStyle;
  85 }
  86
  87 PassRefPtr<RenderStyle> RenderStyle::create()
  88 {
  89     return adoptRef(new RenderStyle());
  90 }
  91
  92 PassRefPtr<RenderStyle> RenderStyle::createDefaultStyle()
  93 {
  94     return adoptRef(new RenderStyle(true));
  95 }
  96
  97 PassRefPtr<RenderStyle> RenderStyle::createAnonymousStyleWithDisplay(const RenderStyle* parentStyle, EDisplay display)
  98 {
  99     RefPtr<RenderStyle> newStyle = RenderStyle::create();
 100     newStyle->inheritFrom(parentStyle);
 101     newStyle->inheritUnicodeBidiFrom(parentStyle);
 102     newStyle->setDisplay(display);
 103     return newStyle;
 104 }
 105
 106 PassRefPtr<RenderStyle> RenderStyle::clone(const RenderStyle* other)
 107 {
 108     return adoptRef(new RenderStyle(*other));
 109 }
 110
 111 ALWAYS_INLINE RenderStyle::RenderStyle()
 112     : m_box(defaultStyle()->m_box)
 113     , visual(defaultStyle()->visual)
 114     , m_background(defaultStyle()->m_background)
 115     , surround(defaultStyle()->surround)
 116     , rareNonInheritedData(defaultStyle()->rareNonInheritedData)
 117     , rareInheritedData(defaultStyle()->rareInheritedData)
 118     , inherited(defaultStyle()->inherited)
 119 #if ENABLE(SVG)
 120     , m_svgStyle(defaultStyle()->m_svgStyle)
 121 #endif
 122 {
 123     setBitDefaults(); // Would it be faster to copy this from the default style?
 124     COMPILE_ASSERT((sizeof(InheritedFlags) <= 8), InheritedFlags_does_not_grow);
 125     COMPILE_ASSERT((sizeof(NonInheritedFlags) <= 8), NonInheritedFlags_does_not_grow);
 126 }
 127
 128 ALWAYS_INLINE RenderStyle::RenderStyle(bool)
 129 {
 130     setBitDefaults();
 131
 132     m_box.init();
 133     visual.init();
 134     m_background.init();
 135     surround.init();
 136     rareNonInheritedData.init();
 137     rareNonInheritedData.access()->m_deprecatedFlexibleBox.init();
 138     rareNonInheritedData.access()->m_flexibleBox.init();
 139     rareNonInheritedData.access()->m_marquee.init();
 140     rareNonInheritedData.access()->m_multiCol.init();
 141     rareNonInheritedData.access()->m_transform.init();
 142 #if ENABLE(CSS_FILTERS)
 143     rareNonInheritedData.access()->m_filter.init();
 144 #endif
 145     rareNonInheritedData.access()->m_grid.init();
 146     rareNonInheritedData.access()->m_gridItem.init();
 147     rareInheritedData.init();
 148     inherited.init();
 149 #if ENABLE(SVG)
 150     m_svgStyle.init();
 151 #endif
 152 }
 153
 154 ALWAYS_INLINE RenderStyle::RenderStyle(const RenderStyle& o)
 155     : RefCounted<RenderStyle>()
 156     , m_box(o.m_box)
 157     , visual(o.visual)
 158     , m_background(o.m_background)
 159     , surround(o.surround)
 160     , rareNonInheritedData(o.rareNonInheritedData)
 161     , rareInheritedData(o.rareInheritedData)
 162     , inherited(o.inherited)
 163 #if ENABLE(SVG)
 164     , m_svgStyle(o.m_svgStyle)
 165 #endif
 166     , inherited_flags(o.inherited_flags)
 167     , noninherited_flags(o.noninherited_flags)
 168 {
 169 }
 170
 171 void RenderStyle::inheritFrom(const RenderStyle* inheritParent, IsAtShadowBoundary isAtShadowBoundary)
 172 {
 173     if (isAtShadowBoundary == AtShadowBoundary) {
 174         // Even if surrounding content is user-editable, shadow DOM should act as a single unit, and not necessarily be editable
 175         EUserModify currentUserModify = userModify();
 176         rareInheritedData = inheritParent->rareInheritedData;
 177         setUserModify(currentUserModify);
 178     } else
 179         rareInheritedData = inheritParent->rareInheritedData;
 180     inherited = inheritParent->inherited;
 181     inherited_flags = inheritParent->inherited_flags;
 182 #if ENABLE(SVG)
 183     if (m_svgStyle != inheritParent->m_svgStyle)
 184         m_svgStyle.access()->inheritFrom(inheritParent->m_svgStyle.get());
 185 #endif
 186 }
 187
 188 void RenderStyle::copyNonInheritedFrom(const RenderStyle* other)
 189 {
 190     m_box = other->m_box;
 191     visual = other->visual;
 192     m_background = other->m_background;
 193     surround = other->surround;
 194     rareNonInheritedData = other->rareNonInheritedData;
 195     // The flags are copied one-by-one because noninherited_flags contains a bunch of stuff other than real style data.
 196     noninherited_flags._effectiveDisplay = other->noninherited_flags._effectiveDisplay;
 197     noninherited_flags._originalDisplay = other->noninherited_flags._originalDisplay;
 198     noninherited_flags._overflowX = other->noninherited_flags._overflowX;
 199     noninherited_flags._overflowY = other->noninherited_flags._overflowY;
 200     noninherited_flags._vertical_align = other->noninherited_flags._vertical_align;
 201     noninherited_flags._clear = other->noninherited_flags._clear;
 202     noninherited_flags._position = other->noninherited_flags._position;
 203     noninherited_flags._floating = other->noninherited_flags._floating;
 204     noninherited_flags._table_layout = other->noninherited_flags._table_layout;
 205     noninherited_flags._unicodeBidi = other->noninherited_flags._unicodeBidi;
 206     noninherited_flags._page_break_before = other->noninherited_flags._page_break_before;
 207     noninherited_flags._page_break_after = other->noninherited_flags._page_break_after;
 208     noninherited_flags._page_break_inside = other->noninherited_flags._page_break_inside;
 209     noninherited_flags.explicitInheritance = other->noninherited_flags.explicitInheritance;
 210 #if ENABLE(SVG)
 211     if (m_svgStyle != other->m_svgStyle)
 212         m_svgStyle.access()->copyNonInheritedFrom(other->m_svgStyle.get());
 213 #endif
 214     ASSERT(zoom() == initialZoom());
 215 }
 216
 217 bool RenderStyle::operator==(const RenderStyle& o) const
 218 {
 219     // compare everything except the pseudoStyle pointer
 220     return inherited_flags == o.inherited_flags
 221         && noninherited_flags == o.noninherited_flags
 222         && m_box == o.m_box
 223         && visual == o.visual
 224         && m_background == o.m_background
 225         && surround == o.surround
 226         && rareNonInheritedData == o.rareNonInheritedData
 227         && rareInheritedData == o.rareInheritedData
 228         && inherited == o.inherited
 229 #if ENABLE(SVG)
 230         && m_svgStyle == o.m_svgStyle
 231 #endif
 232             ;
 233 }
 234
 235 bool RenderStyle::isStyleAvailable() const
 236 {
 237     return this != StyleResolver::styleNotYetAvailable();
 238 }
 239
 240 static inline int pseudoBit(PseudoId pseudo)
 241 {
 242     return 1 << (pseudo - 1);
 243 }
 244
 245 bool RenderStyle::hasAnyPublicPseudoStyles() const
 246 {
 247     return PUBLIC_PSEUDOID_MASK & noninherited_flags._pseudoBits;
 248 }
 249
 250 bool RenderStyle::hasPseudoStyle(PseudoId pseudo) const
 251 {
 252     ASSERT(pseudo > NOPSEUDO);
 253     ASSERT(pseudo < FIRST_INTERNAL_PSEUDOID);
 254     return pseudoBit(pseudo) & noninherited_flags._pseudoBits;
 255 }
 256
 257 void RenderStyle::setHasPseudoStyle(PseudoId pseudo)
 258 {
 259     ASSERT(pseudo > NOPSEUDO);
 260     ASSERT(pseudo < FIRST_INTERNAL_PSEUDOID);
 261     noninherited_flags._pseudoBits |= pseudoBit(pseudo);
 262 }
 263
 264 RenderStyle* RenderStyle::getCachedPseudoStyle(PseudoId pid) const
 265 {
 266     if (!m_cachedPseudoStyles || !m_cachedPseudoStyles->size())
 267         return 0;
 268
 269     if (styleType() != NOPSEUDO)
 270         return 0;
 271
 272     for (size_t i = 0; i < m_cachedPseudoStyles->size(); ++i) {
 273         RenderStyle* pseudoStyle = m_cachedPseudoStyles->at(i).get();
 274         if (pseudoStyle->styleType() == pid)
 275             return pseudoStyle;
 276     }
 277
 278     return 0;
 279 }
 280
 281 RenderStyle* RenderStyle::addCachedPseudoStyle(PassRefPtr<RenderStyle> pseudo)
 282 {
 283     if (!pseudo)
 284         return 0;
 285
 286     ASSERT(pseudo->styleType() > NOPSEUDO);
 287
 288     RenderStyle* result = pseudo.get();
 289
 290     if (!m_cachedPseudoStyles)
 291         m_cachedPseudoStyles = adoptPtr(new PseudoStyleCache);
 292
 293     m_cachedPseudoStyles->append(pseudo);
 294
 295     return result;
 296 }
 297
 298 void RenderStyle::removeCachedPseudoStyle(PseudoId pid)
 299 {
 300     if (!m_cachedPseudoStyles)
 301         return;
 302     for (size_t i = 0; i < m_cachedPseudoStyles->size(); ++i) {
 303         RenderStyle* pseudoStyle = m_cachedPseudoStyles->at(i).get();
 304         if (pseudoStyle->styleType() == pid) {
 305             m_cachedPseudoStyles->remove(i);
 306             return;
 307         }
 308     }
 309 }
 310
 311 bool RenderStyle::inheritedNotEqual(const RenderStyle* other) const
 312 {
 313     return inherited_flags != other->inherited_flags
 314            || inherited != other->inherited
 315 #if ENABLE(SVG)
 316            || m_svgStyle->inheritedNotEqual(other->m_svgStyle.get())
 317 #endif
 318            || rareInheritedData != other->rareInheritedData;
 319 }
 320
 321 bool RenderStyle::inheritedDataShared(const RenderStyle* other) const
 322 {
 323     // This is a fast check that only looks if the data structures are shared.
 324     return inherited_flags == other->inherited_flags
 325         && inherited.get() == other->inherited.get()
 326 #if ENABLE(SVG)
 327         && m_svgStyle.get() == other->m_svgStyle.get()
 328 #endif
 329         && rareInheritedData.get() == other->rareInheritedData.get();
 330 }
 331
 332 static bool positionedObjectMoved(const LengthBox& a, const LengthBox& b)
 333 {
 334     // If any unit types are different, then we can't guarantee
 335     // that this was just a movement.
 336     if (a.left().type() != b.left().type()
 337         || a.right().type() != b.right().type()
 338         || a.top().type() != b.top().type()
 339         || a.bottom().type() != b.bottom().type())
 340         return false;
 341
 342     // Only one unit can be non-auto in the horizontal direction and
 343     // in the vertical direction.  Otherwise the adjustment of values
 344     // is changing the size of the box.
 345     if (!a.left().isIntrinsicOrAuto() && !a.right().isIntrinsicOrAuto())
 346         return false;
 347     if (!a.top().isIntrinsicOrAuto() && !a.bottom().isIntrinsicOrAuto())
 348         return false;
 349
 350     // One of the units is fixed or percent in both directions and stayed
 351     // that way in the new style.  Therefore all we are doing is moving.
 352     return true;
 353 }
 354
 355 StyleDifference RenderStyle::diff(const RenderStyle* other, unsigned& changedContextSensitiveProperties) const
 356 {
 357     changedContextSensitiveProperties = ContextSensitivePropertyNone;
 358
 359 #if ENABLE(SVG)
 360     StyleDifference svgChange = StyleDifferenceEqual;
 361     if (m_svgStyle != other->m_svgStyle) {
 362         svgChange = m_svgStyle->diff(other->m_svgStyle.get());
 363         if (svgChange == StyleDifferenceLayout)
 364             return svgChange;
 365     }
 366 #endif
 367
 368     if (m_box->width() != other->m_box->width()
 369         || m_box->minWidth() != other->m_box->minWidth()
 370         || m_box->maxWidth() != other->m_box->maxWidth()
 371         || m_box->height() != other->m_box->height()
 372         || m_box->minHeight() != other->m_box->minHeight()
 373         || m_box->maxHeight() != other->m_box->maxHeight())
 374         return StyleDifferenceLayout;
 375
 376     if (m_box->verticalAlign() != other->m_box->verticalAlign() || noninherited_flags._vertical_align != other->noninherited_flags._vertical_align)
 377         return StyleDifferenceLayout;
 378
 379     if (m_box->boxSizing() != other->m_box->boxSizing())
 380         return StyleDifferenceLayout;
 381
 382     if (surround->margin != other->surround->margin)
 383         return StyleDifferenceLayout;
 384
 385     if (surround->padding != other->surround->padding)
 386         return StyleDifferenceLayout;
 387
 388     if (rareNonInheritedData.get() != other->rareNonInheritedData.get()) {
 389         if (rareNonInheritedData->m_appearance != other->rareNonInheritedData->m_appearance
 390             || rareNonInheritedData->marginBeforeCollapse != other->rareNonInheritedData->marginBeforeCollapse
 391             || rareNonInheritedData->marginAfterCollapse != other->rareNonInheritedData->marginAfterCollapse
 392             || rareNonInheritedData->lineClamp != other->rareNonInheritedData->lineClamp
 393             || rareNonInheritedData->textOverflow != other->rareNonInheritedData->textOverflow)
 394             return StyleDifferenceLayout;
 395
 396         if (rareNonInheritedData->m_regionOverflow != other->rareNonInheritedData->m_regionOverflow)
 397             return StyleDifferenceLayout;
 398
 399         if (rareNonInheritedData->m_wrapFlow != other->rareNonInheritedData->m_wrapFlow
 400             || rareNonInheritedData->m_wrapThrough != other->rareNonInheritedData->m_wrapThrough
 401             || rareNonInheritedData->m_shapeMargin != other->rareNonInheritedData->m_shapeMargin
 402             || rareNonInheritedData->m_shapePadding != other->rareNonInheritedData->m_shapePadding)
 403             return StyleDifferenceLayout;
 404
 405         if (rareNonInheritedData->m_deprecatedFlexibleBox.get() != other->rareNonInheritedData->m_deprecatedFlexibleBox.get()
 406             && *rareNonInheritedData->m_deprecatedFlexibleBox.get() != *other->rareNonInheritedData->m_deprecatedFlexibleBox.get())
 407             return StyleDifferenceLayout;
 408
 409         if (rareNonInheritedData->m_flexibleBox.get() != other->rareNonInheritedData->m_flexibleBox.get()
 410             && *rareNonInheritedData->m_flexibleBox.get() != *other->rareNonInheritedData->m_flexibleBox.get())
 411             return StyleDifferenceLayout;
 412         if (rareNonInheritedData->m_order != other->rareNonInheritedData->m_order
 413             || rareNonInheritedData->m_alignContent != other->rareNonInheritedData->m_alignContent
 414             || rareNonInheritedData->m_alignItems != other->rareNonInheritedData->m_alignItems
 415             || rareNonInheritedData->m_alignSelf != other->rareNonInheritedData->m_alignSelf
 416             || rareNonInheritedData->m_justifyContent != other->rareNonInheritedData->m_justifyContent)
 417             return StyleDifferenceLayout;
 418
 419         // FIXME: We should add an optimized form of layout that just recomputes visual overflow.
 420         if (!rareNonInheritedData->shadowDataEquivalent(*other->rareNonInheritedData.get()))
 421             return StyleDifferenceLayout;
 422
 423         if (!rareNonInheritedData->reflectionDataEquivalent(*other->rareNonInheritedData.get()))
 424             return StyleDifferenceLayout;
 425
 426         if (rareNonInheritedData->m_multiCol.get() != other->rareNonInheritedData->m_multiCol.get()
 427             && *rareNonInheritedData->m_multiCol.get() != *other->rareNonInheritedData->m_multiCol.get())
 428             return StyleDifferenceLayout;
 429
 430         if (rareNonInheritedData->m_transform.get() != other->rareNonInheritedData->m_transform.get()
 431             && *rareNonInheritedData->m_transform.get() != *other->rareNonInheritedData->m_transform.get()) {
 432 #if USE(ACCELERATED_COMPOSITING)
 433             changedContextSensitiveProperties |= ContextSensitivePropertyTransform;
 434             // Don't return; keep looking for another change
 435 #else
 436             return StyleDifferenceLayout;
 437 #endif
 438         }
 439
 440         if (rareNonInheritedData->m_grid.get() != other->rareNonInheritedData->m_grid.get()
 441             || rareNonInheritedData->m_gridItem.get() != other->rareNonInheritedData->m_gridItem.get())
 442             return StyleDifferenceLayout;
 443
 444 #if !USE(ACCELERATED_COMPOSITING)
 445         if (rareNonInheritedData.get() != other->rareNonInheritedData.get()) {
 446             if (rareNonInheritedData->m_transformStyle3D != other->rareNonInheritedData->m_transformStyle3D
 447                 || rareNonInheritedData->m_backfaceVisibility != other->rareNonInheritedData->m_backfaceVisibility
 448                 || rareNonInheritedData->m_perspective != other->rareNonInheritedData->m_perspective
 449                 || rareNonInheritedData->m_perspectiveOriginX != other->rareNonInheritedData->m_perspectiveOriginX
 450                 || rareNonInheritedData->m_perspectiveOriginY != other->rareNonInheritedData->m_perspectiveOriginY)
 451                 return StyleDifferenceLayout;
 452         }
 453 #endif
 454
 455 #if ENABLE(DASHBOARD_SUPPORT)
 456         // If regions change, trigger a relayout to re-calc regions.
 457         if (rareNonInheritedData->m_dashboardRegions != other->rareNonInheritedData->m_dashboardRegions)
 458             return StyleDifferenceLayout;
 459 #endif
 460
 461 #if ENABLE(CSS_EXCLUSIONS)
 462         if (rareNonInheritedData->m_shapeInside != other->rareNonInheritedData->m_shapeInside)
 463             return StyleDifferenceLayout;
 464 #endif
 465     }
 466
 467     if (rareInheritedData.get() != other->rareInheritedData.get()) {
 468         if (rareInheritedData->highlight != other->rareInheritedData->highlight
 469             || rareInheritedData->indent != other->rareInheritedData->indent
 470             || rareInheritedData->m_effectiveZoom != other->rareInheritedData->m_effectiveZoom
 471             || rareInheritedData->textSizeAdjust != other->rareInheritedData->textSizeAdjust
 472             || rareInheritedData->wordBreak != other->rareInheritedData->wordBreak
 473             || rareInheritedData->overflowWrap != other->rareInheritedData->overflowWrap
 474             || rareInheritedData->nbspMode != other->rareInheritedData->nbspMode
 475             || rareInheritedData->lineBreak != other->rareInheritedData->lineBreak
 476             || rareInheritedData->textSecurity != other->rareInheritedData->textSecurity
 477             || rareInheritedData->hyphens != other->rareInheritedData->hyphens
 478             || rareInheritedData->hyphenationLimitBefore != other->rareInheritedData->hyphenationLimitBefore
 479             || rareInheritedData->hyphenationLimitAfter != other->rareInheritedData->hyphenationLimitAfter
 480             || rareInheritedData->hyphenationString != other->rareInheritedData->hyphenationString
 481             || rareInheritedData->locale != other->rareInheritedData->locale
 482             || rareInheritedData->m_rubyPosition != other->rareInheritedData->m_rubyPosition
 483             || rareInheritedData->textEmphasisMark != other->rareInheritedData->textEmphasisMark
 484             || rareInheritedData->textEmphasisPosition != other->rareInheritedData->textEmphasisPosition
 485             || rareInheritedData->textEmphasisCustomMark != other->rareInheritedData->textEmphasisCustomMark
 486             || rareInheritedData->m_textOrientation != other->rareInheritedData->m_textOrientation
 487             || rareInheritedData->m_tabSize != other->rareInheritedData->m_tabSize
 488             || rareInheritedData->m_lineBoxContain != other->rareInheritedData->m_lineBoxContain
 489             || rareInheritedData->m_lineGrid != other->rareInheritedData->m_lineGrid
 490 #if ENABLE(CSS_IMAGE_RESOLUTION)
 491             || rareInheritedData->m_imageResolutionSource != other->rareInheritedData->m_imageResolutionSource
 492             || rareInheritedData->m_imageResolutionSnap != other->rareInheritedData->m_imageResolutionSnap
 493             || rareInheritedData->m_imageResolution != other->rareInheritedData->m_imageResolution
 494 #endif
 495             || rareInheritedData->m_lineSnap != other->rareInheritedData->m_lineSnap
 496             || rareInheritedData->m_lineAlign != other->rareInheritedData->m_lineAlign
 497             || rareInheritedData->listStyleImage != other->rareInheritedData->listStyleImage)
 498             return StyleDifferenceLayout;
 499
 500         if (!rareInheritedData->shadowDataEquivalent(*other->rareInheritedData.get()))
 501             return StyleDifferenceLayout;
 502
 503         if (textStrokeWidth() != other->textStrokeWidth())
 504             return StyleDifferenceLayout;
 505     }
 506
 507 #if ENABLE(TEXT_AUTOSIZING)
 508     if (visual->m_textAutosizingMultiplier != other->visual->m_textAutosizingMultiplier)
 509         return StyleDifferenceLayout;
 510 #endif
 511
 512     if (inherited->line_height != other->inherited->line_height
 513         || inherited->font != other->inherited->font
 514         || inherited->horizontal_border_spacing != other->inherited->horizontal_border_spacing
 515         || inherited->vertical_border_spacing != other->inherited->vertical_border_spacing
 516         || inherited_flags._box_direction != other->inherited_flags._box_direction
 517         || inherited_flags.m_rtlOrdering != other->inherited_flags.m_rtlOrdering
 518         || noninherited_flags._position != other->noninherited_flags._position
 519         || noninherited_flags._floating != other->noninherited_flags._floating
 520         || noninherited_flags._originalDisplay != other->noninherited_flags._originalDisplay)
 521         return StyleDifferenceLayout;
 522
 523
 524     if (((int)noninherited_flags._effectiveDisplay) >= TABLE) {
 525         if (inherited_flags._border_collapse != other->inherited_flags._border_collapse
 526             || inherited_flags._empty_cells != other->inherited_flags._empty_cells
 527             || inherited_flags._caption_side != other->inherited_flags._caption_side
 528             || noninherited_flags._table_layout != other->noninherited_flags._table_layout)
 529             return StyleDifferenceLayout;
 530
 531         // In the collapsing border model, 'hidden' suppresses other borders, while 'none'
 532         // does not, so these style differences can be width differences.
 533         if (inherited_flags._border_collapse
 534             && ((borderTopStyle() == BHIDDEN && other->borderTopStyle() == BNONE)
 535                 || (borderTopStyle() == BNONE && other->borderTopStyle() == BHIDDEN)
 536                 || (borderBottomStyle() == BHIDDEN && other->borderBottomStyle() == BNONE)
 537                 || (borderBottomStyle() == BNONE && other->borderBottomStyle() == BHIDDEN)
 538                 || (borderLeftStyle() == BHIDDEN && other->borderLeftStyle() == BNONE)
 539                 || (borderLeftStyle() == BNONE && other->borderLeftStyle() == BHIDDEN)
 540                 || (borderRightStyle() == BHIDDEN && other->borderRightStyle() == BNONE)
 541                 || (borderRightStyle() == BNONE && other->borderRightStyle() == BHIDDEN)))
 542             return StyleDifferenceLayout;
 543     }
 544
 545     if (noninherited_flags._effectiveDisplay == LIST_ITEM) {
 546         if (inherited_flags._list_style_type != other->inherited_flags._list_style_type
 547             || inherited_flags._list_style_position != other->inherited_flags._list_style_position)
 548             return StyleDifferenceLayout;
 549     }
 550
 551     if (inherited_flags._text_align != other->inherited_flags._text_align
 552         || inherited_flags._text_transform != other->inherited_flags._text_transform
 553         || inherited_flags._direction != other->inherited_flags._direction
 554         || inherited_flags._white_space != other->inherited_flags._white_space
 555         || noninherited_flags._clear != other->noninherited_flags._clear
 556         || noninherited_flags._unicodeBidi != other->noninherited_flags._unicodeBidi)
 557         return StyleDifferenceLayout;
 558
 559     // Check block flow direction.
 560     if (inherited_flags.m_writingMode != other->inherited_flags.m_writingMode)
 561         return StyleDifferenceLayout;
 562
 563     // Check text combine mode.
 564     if (rareNonInheritedData->m_textCombine != other->rareNonInheritedData->m_textCombine)
 565         return StyleDifferenceLayout;
 566
 567     // Overflow returns a layout hint.
 568     if (noninherited_flags._overflowX != other->noninherited_flags._overflowX
 569         || noninherited_flags._overflowY != other->noninherited_flags._overflowY)
 570         return StyleDifferenceLayout;
 571
 572     // If our border widths change, then we need to layout.  Other changes to borders
 573     // only necessitate a repaint.
 574     if (borderLeftWidth() != other->borderLeftWidth()
 575         || borderTopWidth() != other->borderTopWidth()
 576         || borderBottomWidth() != other->borderBottomWidth()
 577         || borderRightWidth() != other->borderRightWidth())
 578         return StyleDifferenceLayout;
 579
 580     // If the counter directives change, trigger a relayout to re-calculate counter values and rebuild the counter node tree.
 581     const CounterDirectiveMap* mapA = rareNonInheritedData->m_counterDirectives.get();
 582     const CounterDirectiveMap* mapB = other->rareNonInheritedData->m_counterDirectives.get();
 583     if (!(mapA == mapB || (mapA && mapB && *mapA == *mapB)))
 584         return StyleDifferenceLayout;
 585
 586     if ((visibility() == COLLAPSE) != (other->visibility() == COLLAPSE))
 587         return StyleDifferenceLayout;
 588
 589     if ((rareNonInheritedData->opacity == 1 && other->rareNonInheritedData->opacity < 1)
 590         || (rareNonInheritedData->opacity < 1 && other->rareNonInheritedData->opacity == 1)) {
 591         // FIXME: We would like to use SimplifiedLayout here, but we can't quite do that yet.
 592         // We need to make sure SimplifiedLayout can operate correctly on RenderInlines (we will need
 593         // to add a selfNeedsSimplifiedLayout bit in order to not get confused and taint every line).
 594         // In addition we need to solve the floating object issue when layers come and go. Right now
 595         // a full layout is necessary to keep floating object lists sane.
 596         return StyleDifferenceLayout;
 597     }
 598
 599     if (!QuotesData::equals(rareInheritedData->quotes.get(), other->rareInheritedData->quotes.get()))
 600         return StyleDifferenceLayout;
 601
 602 #if ENABLE(SVG)
 603     // SVGRenderStyle::diff() might have returned StyleDifferenceRepaint, eg. if fill changes.
 604     // If eg. the font-size changed at the same time, we're not allowed to return StyleDifferenceRepaint,
 605     // but have to return StyleDifferenceLayout, that's why  this if branch comes after all branches
 606     // that are relevant for SVG and might return StyleDifferenceLayout.
 607     if (svgChange != StyleDifferenceEqual)
 608         return svgChange;
 609 #endif
 610
 611     // Make sure these left/top/right/bottom checks stay below all layout checks and above
 612     // all visible checks.
 613     if (position() != StaticPosition) {
 614         if (surround->offset != other->surround->offset) {
 615              // Optimize for the case where a positioned layer is moving but not changing size.
 616             if (position() == AbsolutePosition && positionedObjectMoved(surround->offset, other->surround->offset))
 617                 return StyleDifferenceLayoutPositionedMovementOnly;
 618
 619             // FIXME: We would like to use SimplifiedLayout for relative positioning, but we can't quite do that yet.
 620             // We need to make sure SimplifiedLayout can operate correctly on RenderInlines (we will need
 621             // to add a selfNeedsSimplifiedLayout bit in order to not get confused and taint every line).
 622             return StyleDifferenceLayout;
 623         } else if (m_box->zIndex() != other->m_box->zIndex() || m_box->hasAutoZIndex() != other->m_box->hasAutoZIndex()
 624                  || visual->clip != other->visual->clip || visual->hasClip != other->visual->hasClip)
 625             return StyleDifferenceRepaintLayer;
 626     }
 627
 628 #if ENABLE(CSS_COMPOSITING)
 629     if (rareNonInheritedData->m_effectiveBlendMode != other->rareNonInheritedData->m_effectiveBlendMode)
 630         return StyleDifferenceRepaintLayer;
 631 #endif
 632
 633     if (rareNonInheritedData->opacity != other->rareNonInheritedData->opacity) {
 634 #if USE(ACCELERATED_COMPOSITING)
 635         changedContextSensitiveProperties |= ContextSensitivePropertyOpacity;
 636         // Don't return; keep looking for another change.
 637 #else
 638         return StyleDifferenceRepaintLayer;
 639 #endif
 640     }
 641
 642 #if ENABLE(CSS_FILTERS)
 643     if (rareNonInheritedData->m_filter.get() != other->rareNonInheritedData->m_filter.get()
 644         && *rareNonInheritedData->m_filter.get() != *other->rareNonInheritedData->m_filter.get()) {
 645 #if USE(ACCELERATED_COMPOSITING)
 646         changedContextSensitiveProperties |= ContextSensitivePropertyFilter;
 647         // Don't return; keep looking for another change.
 648 #else
 649         return StyleDifferenceRepaintLayer;
 650 #endif
 651     }
 652 #endif
 653
 654     if (rareNonInheritedData->m_mask != other->rareNonInheritedData->m_mask
 655         || rareNonInheritedData->m_maskBoxImage != other->rareNonInheritedData->m_maskBoxImage)
 656         return StyleDifferenceRepaintLayer;
 657
 658     if (inherited->color != other->inherited->color
 659         || inherited_flags._visibility != other->inherited_flags._visibility
 660         || inherited_flags._text_decorations != other->inherited_flags._text_decorations
 661         || inherited_flags.m_printColorAdjust != other->inherited_flags.m_printColorAdjust
 662         || inherited_flags._insideLink != other->inherited_flags._insideLink
 663         || surround->border != other->surround->border
 664         || *m_background.get() != *other->m_background.get()
 665         || visual->textDecoration != other->visual->textDecoration
 666         || rareInheritedData->userModify != other->rareInheritedData->userModify
 667         || rareInheritedData->userSelect != other->rareInheritedData->userSelect
 668         || rareNonInheritedData->userDrag != other->rareNonInheritedData->userDrag
 669         || rareNonInheritedData->m_borderFit != other->rareNonInheritedData->m_borderFit
 670 #if ENABLE(CSS3_TEXT)
 671         || rareNonInheritedData->m_textDecorationStyle != other->rareNonInheritedData->m_textDecorationStyle
 672 #endif // CSS3_TEXT
 673         || rareInheritedData->textFillColor != other->rareInheritedData->textFillColor
 674         || rareInheritedData->textStrokeColor != other->rareInheritedData->textStrokeColor
 675         || rareInheritedData->textEmphasisColor != other->rareInheritedData->textEmphasisColor
 676         || rareInheritedData->textEmphasisFill != other->rareInheritedData->textEmphasisFill
 677         || rareInheritedData->m_imageRendering != other->rareInheritedData->m_imageRendering)
 678         return StyleDifferenceRepaint;
 679
 680         // FIXME: The current spec is being reworked to remove dependencies between exclusions and affected
 681         // content. There's a proposal to use floats instead. In that case, wrap-shape should actually relayout
 682         // the parent container. For sure, I will have to revisit this code, but for now I've added this in order
 683         // to avoid having diff() == StyleDifferenceEqual where wrap-shapes actually differ.
 684         // Tracking bug: https://bugs.webkit.org/show_bug.cgi?id=62991
 685         if (rareNonInheritedData->m_shapeOutside != other->rareNonInheritedData->m_shapeOutside)
 686             return StyleDifferenceRepaint;
 687
 688         if (rareNonInheritedData->m_clipPath != other->rareNonInheritedData->m_clipPath)
 689             return StyleDifferenceRepaint;
 690
 691
 692 #if USE(ACCELERATED_COMPOSITING)
 693     if (rareNonInheritedData.get() != other->rareNonInheritedData.get()) {
 694         if (rareNonInheritedData->m_transformStyle3D != other->rareNonInheritedData->m_transformStyle3D
 695             || rareNonInheritedData->m_backfaceVisibility != other->rareNonInheritedData->m_backfaceVisibility
 696             || rareNonInheritedData->m_perspective != other->rareNonInheritedData->m_perspective
 697             || rareNonInheritedData->m_perspectiveOriginX != other->rareNonInheritedData->m_perspectiveOriginX
 698             || rareNonInheritedData->m_perspectiveOriginY != other->rareNonInheritedData->m_perspectiveOriginY)
 699             return StyleDifferenceRecompositeLayer;
 700     }
 701 #endif
 702
 703     // Cursors are not checked, since they will be set appropriately in response to mouse events,
 704     // so they don't need to cause any repaint or layout.
 705
 706     // 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
 707     // the resulting transition properly.
 708     return StyleDifferenceEqual;
 709 }
 710
 711 void RenderStyle::setClip(Length top, Length right, Length bottom, Length left)
 712 {
 713     StyleVisualData* data = visual.access();
 714     data->clip.m_top = top;
 715     data->clip.m_right = right;
 716     data->clip.m_bottom = bottom;
 717     data->clip.m_left = left;
 718 }
 719
 720 void RenderStyle::addCursor(PassRefPtr<StyleImage> image, const IntPoint& hotSpot)
 721 {
 722     if (!rareInheritedData.access()->cursorData)
 723         rareInheritedData.access()->cursorData = CursorList::create();
 724     rareInheritedData.access()->cursorData->append(CursorData(image, hotSpot));
 725 }
 726
 727 void RenderStyle::setCursorList(PassRefPtr<CursorList> other)
 728 {
 729     rareInheritedData.access()->cursorData = other;
 730 }
 731
 732 void RenderStyle::setQuotes(PassRefPtr<QuotesData> q)
 733 {
 734     if (QuotesData::equals(rareInheritedData->quotes.get(), q.get()))
 735         return;
 736     rareInheritedData.access()->quotes = q;
 737 }
 738
 739 void RenderStyle::clearCursorList()
 740 {
 741     if (rareInheritedData->cursorData)
 742         rareInheritedData.access()->cursorData = 0;
 743 }
 744
 745 void RenderStyle::clearContent()
 746 {
 747     if (rareNonInheritedData->m_content)
 748         rareNonInheritedData.access()->m_content = nullptr;
 749 }
 750
 751 void RenderStyle::appendContent(PassOwnPtr<ContentData> contentData)
 752 {
 753     OwnPtr<ContentData>& content = rareNonInheritedData.access()->m_content;
 754     ContentData* lastContent = content.get();
 755     while (lastContent && lastContent->next())
 756         lastContent = lastContent->next();
 757
 758     if (lastContent)
 759         lastContent->setNext(contentData);
 760     else
 761         content = contentData;
 762 }
 763
 764 void RenderStyle::setContent(PassRefPtr<StyleImage> image, bool add)
 765 {
 766     if (!image)
 767         return;
 768
 769     if (add) {
 770         appendContent(ContentData::create(image));
 771         return;
 772     }
 773
 774     rareNonInheritedData.access()->m_content = ContentData::create(image);
 775 }
 776
 777 void RenderStyle::setContent(const String& string, bool add)
 778 {
 779     OwnPtr<ContentData>& content = rareNonInheritedData.access()->m_content;
 780     if (add) {
 781         ContentData* lastContent = content.get();
 782         while (lastContent && lastContent->next())
 783             lastContent = lastContent->next();
 784
 785         if (lastContent) {
 786             // We attempt to merge with the last ContentData if possible.
 787             if (lastContent->isText()) {
 788                 TextContentData* textContent = static_cast<TextContentData*>(lastContent);
 789                 textContent->setText(textContent->text() + string);
 790             } else
 791                 lastContent->setNext(ContentData::create(string));
 792
 793             return;
 794         }
 795     }
 796
 797     content = ContentData::create(string);
 798 }
 799
 800 void RenderStyle::setContent(PassOwnPtr<CounterContent> counter, bool add)
 801 {
 802     if (!counter)
 803         return;
 804
 805     if (add) {
 806         appendContent(ContentData::create(counter));
 807         return;
 808     }
 809
 810     rareNonInheritedData.access()->m_content = ContentData::create(counter);
 811 }
 812
 813 void RenderStyle::setContent(QuoteType quote, bool add)
 814 {
 815     if (add) {
 816         appendContent(ContentData::create(quote));
 817         return;
 818     }
 819
 820     rareNonInheritedData.access()->m_content = ContentData::create(quote);
 821 }
 822
 823 inline bool requireTransformOrigin(const Vector<RefPtr<TransformOperation> >& transformOperations, RenderStyle::ApplyTransformOrigin applyOrigin)
 824 {
 825     // transform-origin brackets the transform with translate operations.
 826     // Optimize for the case where the only transform is a translation, since the transform-origin is irrelevant
 827     // in that case.
 828     if (applyOrigin != RenderStyle::IncludeTransformOrigin)
 829         return false;
 830
 831     unsigned size = transformOperations.size();
 832     for (unsigned i = 0; i < size; ++i) {
 833         TransformOperation::OperationType type = transformOperations[i]->getOperationType();
 834         if (type != TransformOperation::TRANSLATE_X
 835             && type != TransformOperation::TRANSLATE_Y
 836             && type != TransformOperation::TRANSLATE
 837             && type != TransformOperation::TRANSLATE_Z
 838             && type != TransformOperation::TRANSLATE_3D)
 839             return true;
 840     }
 841
 842     return false;
 843 }
 844
 845 void RenderStyle::applyTransform(TransformationMatrix& transform, const LayoutSize& borderBoxSize, ApplyTransformOrigin applyOrigin) const
 846 {
 847     // FIXME: when subpixel layout is supported (bug 71143) the body of this function could be replaced by
 848     // applyTransform(transform, FloatRect(FloatPoint(), borderBoxSize), applyOrigin);
 849
 850     const Vector<RefPtr<TransformOperation> >& transformOperations = rareNonInheritedData->m_transform->m_operations.operations();
 851     bool applyTransformOrigin = requireTransformOrigin(transformOperations, applyOrigin);
 852
 853     if (applyTransformOrigin)
 854         transform.translate3d(floatValueForLength(transformOriginX(), borderBoxSize.width()), floatValueForLength(transformOriginY(), borderBoxSize.height()), transformOriginZ());
 855
 856     unsigned size = transformOperations.size();
 857     for (unsigned i = 0; i < size; ++i)
 858         transformOperations[i]->apply(transform, borderBoxSize);
 859
 860     if (applyTransformOrigin)
 861         transform.translate3d(-floatValueForLength(transformOriginX(), borderBoxSize.width()), -floatValueForLength(transformOriginY(), borderBoxSize.height()), -transformOriginZ());
 862 }
 863
 864 void RenderStyle::applyTransform(TransformationMatrix& transform, const FloatRect& boundingBox, ApplyTransformOrigin applyOrigin) const
 865 {
 866     const Vector<RefPtr<TransformOperation> >& transformOperations = rareNonInheritedData->m_transform->m_operations.operations();
 867     bool applyTransformOrigin = requireTransformOrigin(transformOperations, applyOrigin);
 868
 869     float offsetX = transformOriginX().type() == Percent ? boundingBox.x() : 0;
 870     float offsetY = transformOriginY().type() == Percent ? boundingBox.y() : 0;
 871
 872     if (applyTransformOrigin) {
 873         transform.translate3d(floatValueForLength(transformOriginX(), boundingBox.width()) + offsetX,
 874                               floatValueForLength(transformOriginY(), boundingBox.height()) + offsetY,
 875                               transformOriginZ());
 876     }
 877
 878     unsigned size = transformOperations.size();
 879     for (unsigned i = 0; i < size; ++i)
 880         transformOperations[i]->apply(transform, boundingBox.size());
 881
 882     if (applyTransformOrigin) {
 883         transform.translate3d(-floatValueForLength(transformOriginX(), boundingBox.width()) - offsetX,
 884                               -floatValueForLength(transformOriginY(), boundingBox.height()) - offsetY,
 885                               -transformOriginZ());
 886     }
 887 }
 888
 889 void RenderStyle::setPageScaleTransform(float scale)
 890 {
 891     if (scale == 1)
 892         return;
 893     TransformOperations transform;
 894     transform.operations().append(ScaleTransformOperation::create(scale, scale, ScaleTransformOperation::SCALE));
 895     setTransform(transform);
 896     setTransformOriginX(Length(0, Fixed));
 897     setTransformOriginY(Length(0, Fixed));
 898 }
 899
 900 void RenderStyle::setTextShadow(PassOwnPtr<ShadowData> shadowData, bool add)
 901 {
 902     ASSERT(!shadowData || (!shadowData->spread() && shadowData->style() == Normal));
 903
 904     StyleRareInheritedData* rareData = rareInheritedData.access();
 905     if (!add) {
 906         rareData->textShadow = shadowData;
 907         return;
 908     }
 909
 910     shadowData->setNext(rareData->textShadow.release());
 911     rareData->textShadow = shadowData;
 912 }
 913
 914 void RenderStyle::setBoxShadow(PassOwnPtr<ShadowData> shadowData, bool add)
 915 {
 916     StyleRareNonInheritedData* rareData = rareNonInheritedData.access();
 917     if (!add) {
 918         rareData->m_boxShadow = shadowData;
 919         return;
 920     }
 921
 922     shadowData->setNext(rareData->m_boxShadow.release());
 923     rareData->m_boxShadow = shadowData;
 924 }
 925
 926 static RoundedRect::Radii calcRadiiFor(const BorderData& border, IntSize size, RenderView* renderView)
 927 {
 928     return RoundedRect::Radii(
 929         IntSize(valueForLength(border.topLeft().width(), size.width(), renderView),
 930                 valueForLength(border.topLeft().height(), size.height(), renderView)),
 931         IntSize(valueForLength(border.topRight().width(), size.width(), renderView),
 932                 valueForLength(border.topRight().height(), size.height(), renderView)),
 933         IntSize(valueForLength(border.bottomLeft().width(), size.width(), renderView),
 934                 valueForLength(border.bottomLeft().height(), size.height(), renderView)),
 935         IntSize(valueForLength(border.bottomRight().width(), size.width(), renderView),
 936                 valueForLength(border.bottomRight().height(), size.height(), renderView)));
 937 }
 938
 939 static float calcConstraintScaleFor(const IntRect& rect, const RoundedRect::Radii& radii)
 940 {
 941     // Constrain corner radii using CSS3 rules:
 942     // http://www.w3.org/TR/css3-background/#the-border-radius
 943
 944     float factor = 1;
 945     unsigned radiiSum;
 946
 947     // top
 948     radiiSum = static_cast<unsigned>(radii.topLeft().width()) + static_cast<unsigned>(radii.topRight().width()); // Casts to avoid integer overflow.
 949     if (radiiSum > static_cast<unsigned>(rect.width()))
 950         factor = min(static_cast<float>(rect.width()) / radiiSum, factor);
 951
 952     // bottom
 953     radiiSum = static_cast<unsigned>(radii.bottomLeft().width()) + static_cast<unsigned>(radii.bottomRight().width());
 954     if (radiiSum > static_cast<unsigned>(rect.width()))
 955         factor = min(static_cast<float>(rect.width()) / radiiSum, factor);
 956
 957     // left
 958     radiiSum = static_cast<unsigned>(radii.topLeft().height()) + static_cast<unsigned>(radii.bottomLeft().height());
 959     if (radiiSum > static_cast<unsigned>(rect.height()))
 960         factor = min(static_cast<float>(rect.height()) / radiiSum, factor);
 961
 962     // right
 963     radiiSum = static_cast<unsigned>(radii.topRight().height()) + static_cast<unsigned>(radii.bottomRight().height());
 964     if (radiiSum > static_cast<unsigned>(rect.height()))
 965         factor = min(static_cast<float>(rect.height()) / radiiSum, factor);
 966
 967     ASSERT(factor <= 1);
 968     return factor;
 969 }
 970
 971 StyleImage* RenderStyle::listStyleImage() const { return rareInheritedData->listStyleImage.get(); }
 972 void RenderStyle::setListStyleImage(PassRefPtr<StyleImage> v)
 973 {
 974     if (rareInheritedData->listStyleImage != v)
 975         rareInheritedData.access()->listStyleImage = v;
 976 }
 977
 978 Color RenderStyle::color() const { return inherited->color; }
 979 Color RenderStyle::visitedLinkColor() const { return inherited->visitedLinkColor; }
 980 void RenderStyle::setColor(const Color& v) { SET_VAR(inherited, color, v); }
 981 void RenderStyle::setVisitedLinkColor(const Color& v) { SET_VAR(inherited, visitedLinkColor, v); }
 982
 983 short RenderStyle::horizontalBorderSpacing() const { return inherited->horizontal_border_spacing; }
 984 short RenderStyle::verticalBorderSpacing() const { return inherited->vertical_border_spacing; }
 985 void RenderStyle::setHorizontalBorderSpacing(short v) { SET_VAR(inherited, horizontal_border_spacing, v); }
 986 void RenderStyle::setVerticalBorderSpacing(short v) { SET_VAR(inherited, vertical_border_spacing, v); }
 987
 988 RoundedRect RenderStyle::getRoundedBorderFor(const LayoutRect& borderRect, RenderView* renderView, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
 989 {
 990     IntRect snappedBorderRect(pixelSnappedIntRect(borderRect));
 991     RoundedRect roundedRect(snappedBorderRect);
 992     if (hasBorderRadius()) {
 993         RoundedRect::Radii radii = calcRadiiFor(surround->border, snappedBorderRect.size(), renderView);
 994         radii.scale(calcConstraintScaleFor(snappedBorderRect, radii));
 995         roundedRect.includeLogicalEdges(radii, isHorizontalWritingMode(), includeLogicalLeftEdge, includeLogicalRightEdge);
 996     }
 997     return roundedRect;
 998 }
 999
1000 RoundedRect RenderStyle::getRoundedInnerBorderFor(const LayoutRect& borderRect, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
1001 {
1002     bool horizontal = isHorizontalWritingMode();
1003
1004     int leftWidth = (!horizontal || includeLogicalLeftEdge) ? borderLeftWidth() : 0;
1005     int rightWidth = (!horizontal || includeLogicalRightEdge) ? borderRightWidth() : 0;
1006     int topWidth = (horizontal || includeLogicalLeftEdge) ? borderTopWidth() : 0;
1007     int bottomWidth = (horizontal || includeLogicalRightEdge) ? borderBottomWidth() : 0;
1008
1009     return getRoundedInnerBorderFor(borderRect, topWidth, bottomWidth, leftWidth, rightWidth, includeLogicalLeftEdge, includeLogicalRightEdge);
1010 }
1011
1012 RoundedRect RenderStyle::getRoundedInnerBorderFor(const LayoutRect& borderRect,
1013     int topWidth, int bottomWidth, int leftWidth, int rightWidth, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const
1014 {
1015     LayoutRect innerRect(borderRect.x() + leftWidth,
1016                borderRect.y() + topWidth,
1017                borderRect.width() - leftWidth - rightWidth,
1018                borderRect.height() - topWidth - bottomWidth);
1019
1020     RoundedRect roundedRect(pixelSnappedIntRect(innerRect));
1021
1022     if (hasBorderRadius()) {
1023         RoundedRect::Radii radii = getRoundedBorderFor(borderRect).radii();
1024         radii.shrink(topWidth, bottomWidth, leftWidth, rightWidth);
1025         roundedRect.includeLogicalEdges(radii, isHorizontalWritingMode(), includeLogicalLeftEdge, includeLogicalRightEdge);
1026     }
1027     return roundedRect;
1028 }
1029
1030 static bool allLayersAreFixed(const FillLayer* layer)
1031 {
1032     bool allFixed = true;
1033
1034     for (const FillLayer* currLayer = layer; currLayer; currLayer = currLayer->next())
1035         allFixed &= (currLayer->image() && currLayer->attachment() == FixedBackgroundAttachment);
1036
1037     return layer && allFixed;
1038 }
1039
1040 bool RenderStyle::hasEntirelyFixedBackground() const
1041 {
1042     return allLayersAreFixed(backgroundLayers());
1043 }
1044
1045 const CounterDirectiveMap* RenderStyle::counterDirectives() const
1046 {
1047     return rareNonInheritedData->m_counterDirectives.get();
1048 }
1049
1050 CounterDirectiveMap& RenderStyle::accessCounterDirectives()
1051 {
1052     OwnPtr<CounterDirectiveMap>& map = rareNonInheritedData.access()->m_counterDirectives;
1053     if (!map)
1054         map = adoptPtr(new CounterDirectiveMap);
1055     return *map;
1056 }
1057
1058 const CounterDirectives RenderStyle::getCounterDirectives(const AtomicString& identifier) const
1059 {
1060     if (const CounterDirectiveMap* directives = counterDirectives())
1061         return directives->get(identifier);
1062     return CounterDirectives();
1063 }
1064
1065 const AtomicString& RenderStyle::hyphenString() const
1066 {
1067     ASSERT(hyphens() != HyphensNone);
1068
1069     const AtomicString& hyphenationString = rareInheritedData.get()->hyphenationString;
1070     if (!hyphenationString.isNull())
1071         return hyphenationString;
1072
1073     // FIXME: This should depend on locale.
1074     DEFINE_STATIC_LOCAL(AtomicString, hyphenMinusString, (&hyphenMinus, 1));
1075     DEFINE_STATIC_LOCAL(AtomicString, hyphenString, (&hyphen, 1));
1076     return font().primaryFontHasGlyphForCharacter(hyphen) ? hyphenString : hyphenMinusString;
1077 }
1078
1079 const AtomicString& RenderStyle::textEmphasisMarkString() const
1080 {
1081     switch (textEmphasisMark()) {
1082     case TextEmphasisMarkNone:
1083         return nullAtom;
1084     case TextEmphasisMarkCustom:
1085         return textEmphasisCustomMark();
1086     case TextEmphasisMarkDot: {
1087         DEFINE_STATIC_LOCAL(AtomicString, filledDotString, (&bullet, 1));
1088         DEFINE_STATIC_LOCAL(AtomicString, openDotString, (&whiteBullet, 1));
1089         return textEmphasisFill() == TextEmphasisFillFilled ? filledDotString : openDotString;
1090     }
1091     case TextEmphasisMarkCircle: {
1092         DEFINE_STATIC_LOCAL(AtomicString, filledCircleString, (&blackCircle, 1));
1093         DEFINE_STATIC_LOCAL(AtomicString, openCircleString, (&whiteCircle, 1));
1094         return textEmphasisFill() == TextEmphasisFillFilled ? filledCircleString : openCircleString;
1095     }
1096     case TextEmphasisMarkDoubleCircle: {
1097         DEFINE_STATIC_LOCAL(AtomicString, filledDoubleCircleString, (&fisheye, 1));
1098         DEFINE_STATIC_LOCAL(AtomicString, openDoubleCircleString, (&bullseye, 1));
1099         return textEmphasisFill() == TextEmphasisFillFilled ? filledDoubleCircleString : openDoubleCircleString;
1100     }
1101     case TextEmphasisMarkTriangle: {
1102         DEFINE_STATIC_LOCAL(AtomicString, filledTriangleString, (&blackUpPointingTriangle, 1));
1103         DEFINE_STATIC_LOCAL(AtomicString, openTriangleString, (&whiteUpPointingTriangle, 1));
1104         return textEmphasisFill() == TextEmphasisFillFilled ? filledTriangleString : openTriangleString;
1105     }
1106     case TextEmphasisMarkSesame: {
1107         DEFINE_STATIC_LOCAL(AtomicString, filledSesameString, (&sesameDot, 1));
1108         DEFINE_STATIC_LOCAL(AtomicString, openSesameString, (&whiteSesameDot, 1));
1109         return textEmphasisFill() == TextEmphasisFillFilled ? filledSesameString : openSesameString;
1110     }
1111     case TextEmphasisMarkAuto:
1112         ASSERT_NOT_REACHED();
1113         return nullAtom;
1114     }
1115
1116     ASSERT_NOT_REACHED();
1117     return nullAtom;
1118 }
1119
1120 #if ENABLE(DASHBOARD_SUPPORT)
1121 const Vector<StyleDashboardRegion>& RenderStyle::initialDashboardRegions()
1122 {
1123     DEFINE_STATIC_LOCAL(Vector<StyleDashboardRegion>, emptyList, ());
1124     return emptyList;
1125 }
1126
1127 const Vector<StyleDashboardRegion>& RenderStyle::noneDashboardRegions()
1128 {
1129     DEFINE_STATIC_LOCAL(Vector<StyleDashboardRegion>, noneList, ());
1130     static bool noneListInitialized = false;
1131
1132     if (!noneListInitialized) {
1133         StyleDashboardRegion region;
1134         region.label = "";
1135         region.offset.m_top  = Length();
1136         region.offset.m_right = Length();
1137         region.offset.m_bottom = Length();
1138         region.offset.m_left = Length();
1139         region.type = StyleDashboardRegion::None;
1140         noneList.append(region);
1141         noneListInitialized = true;
1142     }
1143     return noneList;
1144 }
1145 #endif
1146
1147 void RenderStyle::adjustAnimations()
1148 {
1149     AnimationList* animationList = rareNonInheritedData->m_animations.get();
1150     if (!animationList)
1151         return;
1152
1153     // Get rid of empty animations and anything beyond them
1154     for (size_t i = 0; i < animationList->size(); ++i) {
1155         if (animationList->animation(i)->isEmpty()) {
1156             animationList->resize(i);
1157             break;
1158         }
1159     }
1160
1161     if (animationList->isEmpty()) {
1162         clearAnimations();
1163         return;
1164     }
1165
1166     // Repeat patterns into layers that don't have some properties set.
1167     animationList->fillUnsetProperties();
1168 }
1169
1170 void RenderStyle::adjustTransitions()
1171 {
1172     AnimationList* transitionList = rareNonInheritedData->m_transitions.get();
1173     if (!transitionList)
1174         return;
1175
1176     // Get rid of empty transitions and anything beyond them
1177     for (size_t i = 0; i < transitionList->size(); ++i) {
1178         if (transitionList->animation(i)->isEmpty()) {
1179             transitionList->resize(i);
1180             break;
1181         }
1182     }
1183
1184     if (transitionList->isEmpty()) {
1185         clearTransitions();
1186         return;
1187     }
1188
1189     // Repeat patterns into layers that don't have some properties set.
1190     transitionList->fillUnsetProperties();
1191
1192     // Make sure there are no duplicate properties. This is an O(n^2) algorithm
1193     // but the lists tend to be very short, so it is probably ok
1194     for (size_t i = 0; i < transitionList->size(); ++i) {
1195         for (size_t j = i+1; j < transitionList->size(); ++j) {
1196             if (transitionList->animation(i)->property() == transitionList->animation(j)->property()) {
1197                 // toss i
1198                 transitionList->remove(i);
1199                 j = i;
1200             }
1201         }
1202     }
1203 }
1204
1205 AnimationList* RenderStyle::accessAnimations()
1206 {
1207     if (!rareNonInheritedData.access()->m_animations)
1208         rareNonInheritedData.access()->m_animations = adoptPtr(new AnimationList());
1209     return rareNonInheritedData->m_animations.get();
1210 }
1211
1212 AnimationList* RenderStyle::accessTransitions()
1213 {
1214     if (!rareNonInheritedData.access()->m_transitions)
1215         rareNonInheritedData.access()->m_transitions = adoptPtr(new AnimationList());
1216     return rareNonInheritedData->m_transitions.get();
1217 }
1218
1219 const Animation* RenderStyle::transitionForProperty(CSSPropertyID property) const
1220 {
1221     if (transitions()) {
1222         for (size_t i = 0; i < transitions()->size(); ++i) {
1223             const Animation* p = transitions()->animation(i);
1224             if (p->animationMode() == Animation::AnimateAll || p->property() == property) {
1225                 return p;
1226             }
1227         }
1228     }
1229     return 0;
1230 }
1231
1232 const Font& RenderStyle::font() const { return inherited->font; }
1233 const FontMetrics& RenderStyle::fontMetrics() const { return inherited->font.fontMetrics(); }
1234 const FontDescription& RenderStyle::fontDescription() const { return inherited->font.fontDescription(); }
1235 float RenderStyle::specifiedFontSize() const { return fontDescription().specifiedSize(); }
1236 float RenderStyle::computedFontSize() const { return fontDescription().computedSize(); }
1237 int RenderStyle::fontSize() const { return inherited->font.pixelSize(); }
1238
1239 int RenderStyle::wordSpacing() const { return inherited->font.wordSpacing(); }
1240 int RenderStyle::letterSpacing() const { return inherited->font.letterSpacing(); }
1241
1242 bool RenderStyle::setFontDescription(const FontDescription& v)
1243 {
1244     if (inherited->font.fontDescription() != v) {
1245         inherited.access()->font = Font(v, inherited->font.letterSpacing(), inherited->font.wordSpacing());
1246         return true;
1247     }
1248     return false;
1249 }
1250
1251 Length RenderStyle::specifiedLineHeight() const { return inherited->line_height; }
1252 Length RenderStyle::lineHeight() const
1253 {
1254     const Length& lh = inherited->line_height;
1255 #if ENABLE(TEXT_AUTOSIZING)
1256     // Unlike fontDescription().computedSize() and hence fontSize(), this is
1257     // recalculated on demand as we only store the specified line height.
1258     // FIXME: Should consider scaling the fixed part of any calc expressions
1259     // too, though this involves messily poking into CalcExpressionLength.
1260     float multiplier = textAutosizingMultiplier();
1261     if (multiplier > 1 && lh.isFixed())
1262         return Length(TextAutosizer::computeAutosizedFontSize(lh.value(), multiplier), Fixed);
1263 #endif
1264     return lh;
1265 }
1266 void RenderStyle::setLineHeight(Length specifiedLineHeight) { SET_VAR(inherited, line_height, specifiedLineHeight); }
1267
1268 int RenderStyle::computedLineHeight(RenderView* renderView) const
1269 {
1270     const Length& lh = lineHeight();
1271
1272     // Negative value means the line height is not set. Use the font's built-in spacing.
1273     if (lh.isNegative())
1274         return fontMetrics().lineSpacing();
1275
1276     if (lh.isPercent())
1277         return minimumValueForLength(lh, fontSize());
1278
1279     if (lh.isViewportPercentage())
1280         return valueForLength(lh, 0, renderView);
1281
1282     return lh.value();
1283 }
1284
1285 void RenderStyle::setWordSpacing(int v) { inherited.access()->font.setWordSpacing(v); }
1286 void RenderStyle::setLetterSpacing(int v) { inherited.access()->font.setLetterSpacing(v); }
1287
1288 void RenderStyle::setFontSize(float size)
1289 {
1290     // size must be specifiedSize if Text Autosizing is enabled, but computedSize if text
1291     // zoom is enabled (if neither is enabled it's irrelevant as they're probably the same).
1292
1293     ASSERT(isfinite(size));
1294     if (!isfinite(size) || size < 0)
1295         size = 0;
1296     else
1297         size = min(maximumAllowedFontSize, size);
1298
1299     FontSelector* currentFontSelector = font().fontSelector();
1300     FontDescription desc(fontDescription());
1301     desc.setSpecifiedSize(size);
1302     desc.setComputedSize(size);
1303
1304 #if ENABLE(TEXT_AUTOSIZING)
1305     float multiplier = textAutosizingMultiplier();
1306     if (multiplier > 1) {
1307         float autosizedFontSize = TextAutosizer::computeAutosizedFontSize(size, multiplier);
1308         desc.setComputedSize(min(maximumAllowedFontSize, autosizedFontSize));
1309     }
1310 #endif
1311
1312     setFontDescription(desc);
1313     font().update(currentFontSelector);
1314 }
1315
1316 void RenderStyle::getShadowExtent(const ShadowData* shadow, LayoutUnit &top, LayoutUnit &right, LayoutUnit &bottom, LayoutUnit &left) const
1317 {
1318     top = 0;
1319     right = 0;
1320     bottom = 0;
1321     left = 0;
1322
1323     for ( ; shadow; shadow = shadow->next()) {
1324         if (shadow->style() == Inset)
1325             continue;
1326         int blurAndSpread = shadow->blur() + shadow->spread();
1327
1328         top = min<LayoutUnit>(top, shadow->y() - blurAndSpread);
1329         right = max<LayoutUnit>(right, shadow->x() + blurAndSpread);
1330         bottom = max<LayoutUnit>(bottom, shadow->y() + blurAndSpread);
1331         left = min<LayoutUnit>(left, shadow->x() - blurAndSpread);
1332     }
1333 }
1334
1335 LayoutBoxExtent RenderStyle::getShadowInsetExtent(const ShadowData* shadow) const
1336 {
1337     LayoutUnit top = 0;
1338     LayoutUnit right = 0;
1339     LayoutUnit bottom = 0;
1340     LayoutUnit left = 0;
1341
1342     for ( ; shadow; shadow = shadow->next()) {
1343         if (shadow->style() == Normal)
1344             continue;
1345         int blurAndSpread = shadow->blur() + shadow->spread();
1346         top = max<LayoutUnit>(top, shadow->y() + blurAndSpread);
1347         right = min<LayoutUnit>(right, shadow->x() - blurAndSpread);
1348         bottom = min<LayoutUnit>(bottom, shadow->y() - blurAndSpread);
1349         left = max<LayoutUnit>(left, shadow->x() + blurAndSpread);
1350     }
1351
1352     return LayoutBoxExtent(top, right, bottom, left);
1353 }
1354
1355 void RenderStyle::getShadowHorizontalExtent(const ShadowData* shadow, LayoutUnit &left, LayoutUnit &right) const
1356 {
1357     left = 0;
1358     right = 0;
1359
1360     for ( ; shadow; shadow = shadow->next()) {
1361         if (shadow->style() == Inset)
1362             continue;
1363         int blurAndSpread = shadow->blur() + shadow->spread();
1364
1365         left = min<LayoutUnit>(left, shadow->x() - blurAndSpread);
1366         right = max<LayoutUnit>(right, shadow->x() + blurAndSpread);
1367     }
1368 }
1369
1370 void RenderStyle::getShadowVerticalExtent(const ShadowData* shadow, LayoutUnit &top, LayoutUnit &bottom) const
1371 {
1372     top = 0;
1373     bottom = 0;
1374
1375     for ( ; shadow; shadow = shadow->next()) {
1376         if (shadow->style() == Inset)
1377             continue;
1378         int blurAndSpread = shadow->blur() + shadow->spread();
1379
1380         top = min<LayoutUnit>(top, shadow->y() - blurAndSpread);
1381         bottom = max<LayoutUnit>(bottom, shadow->y() + blurAndSpread);
1382     }
1383 }
1384
1385 Color RenderStyle::colorIncludingFallback(int colorProperty, bool visitedLink) const
1386 {
1387     Color result;
1388     EBorderStyle borderStyle = BNONE;
1389     switch (colorProperty) {
1390     case CSSPropertyBackgroundColor:
1391         return visitedLink ? visitedLinkBackgroundColor() : backgroundColor(); // Background color doesn't fall back.
1392     case CSSPropertyBorderLeftColor:
1393         result = visitedLink ? visitedLinkBorderLeftColor() : borderLeftColor();
1394         borderStyle = borderLeftStyle();
1395         break;
1396     case CSSPropertyBorderRightColor:
1397         result = visitedLink ? visitedLinkBorderRightColor() : borderRightColor();
1398         borderStyle = borderRightStyle();
1399         break;
1400     case CSSPropertyBorderTopColor:
1401         result = visitedLink ? visitedLinkBorderTopColor() : borderTopColor();
1402         borderStyle = borderTopStyle();
1403         break;
1404     case CSSPropertyBorderBottomColor:
1405         result = visitedLink ? visitedLinkBorderBottomColor() : borderBottomColor();
1406         borderStyle = borderBottomStyle();
1407         break;
1408     case CSSPropertyColor:
1409         result = visitedLink ? visitedLinkColor() : color();
1410         break;
1411     case CSSPropertyOutlineColor:
1412         result = visitedLink ? visitedLinkOutlineColor() : outlineColor();
1413         break;
1414     case CSSPropertyWebkitColumnRuleColor:
1415         result = visitedLink ? visitedLinkColumnRuleColor() : columnRuleColor();
1416         break;
1417     case CSSPropertyWebkitTextEmphasisColor:
1418         result = visitedLink ? visitedLinkTextEmphasisColor() : textEmphasisColor();
1419         break;
1420     case CSSPropertyWebkitTextFillColor:
1421         result = visitedLink ? visitedLinkTextFillColor() : textFillColor();
1422         break;
1423     case CSSPropertyWebkitTextStrokeColor:
1424         result = visitedLink ? visitedLinkTextStrokeColor() : textStrokeColor();
1425         break;
1426     default:
1427         ASSERT_NOT_REACHED();
1428         break;
1429     }
1430
1431     if (!result.isValid()) {
1432         if (!visitedLink && (borderStyle == INSET || borderStyle == OUTSET || borderStyle == RIDGE || borderStyle == GROOVE))
1433             result.setRGB(238, 238, 238);
1434         else
1435             result = visitedLink ? visitedLinkColor() : color();
1436     }
1437     return result;
1438 }
1439
1440 Color RenderStyle::visitedDependentColor(int colorProperty) const
1441 {
1442     Color unvisitedColor = colorIncludingFallback(colorProperty, false);
1443     if (insideLink() != InsideVisitedLink)
1444         return unvisitedColor;
1445
1446     Color visitedColor = colorIncludingFallback(colorProperty, true);
1447
1448     // FIXME: Technically someone could explicitly specify the color transparent, but for now we'll just
1449     // assume that if the background color is transparent that it wasn't set. Note that it's weird that
1450     // we're returning unvisited info for a visited link, but given our restriction that the alpha values
1451     // have to match, it makes more sense to return the unvisited background color if specified than it
1452     // does to return black. This behavior matches what Firefox 4 does as well.
1453     if (colorProperty == CSSPropertyBackgroundColor && visitedColor == Color::transparent)
1454         return unvisitedColor;
1455
1456     // Take the alpha from the unvisited color, but get the RGB values from the visited color.
1457     return Color(visitedColor.red(), visitedColor.green(), visitedColor.blue(), unvisitedColor.alpha());
1458 }
1459
1460 const BorderValue& RenderStyle::borderBefore() const
1461 {
1462     switch (writingMode()) {
1463     case TopToBottomWritingMode:
1464         return borderTop();
1465     case BottomToTopWritingMode:
1466         return borderBottom();
1467     case LeftToRightWritingMode:
1468         return borderLeft();
1469     case RightToLeftWritingMode:
1470         return borderRight();
1471     }
1472     ASSERT_NOT_REACHED();
1473     return borderTop();
1474 }
1475
1476 const BorderValue& RenderStyle::borderAfter() const
1477 {
1478     switch (writingMode()) {
1479     case TopToBottomWritingMode:
1480         return borderBottom();
1481     case BottomToTopWritingMode:
1482         return borderTop();
1483     case LeftToRightWritingMode:
1484         return borderRight();
1485     case RightToLeftWritingMode:
1486         return borderLeft();
1487     }
1488     ASSERT_NOT_REACHED();
1489     return borderBottom();
1490 }
1491
1492 const BorderValue& RenderStyle::borderStart() const
1493 {
1494     if (isHorizontalWritingMode())
1495         return isLeftToRightDirection() ? borderLeft() : borderRight();
1496     return isLeftToRightDirection() ? borderTop() : borderBottom();
1497 }
1498
1499 const BorderValue& RenderStyle::borderEnd() const
1500 {
1501     if (isHorizontalWritingMode())
1502         return isLeftToRightDirection() ? borderRight() : borderLeft();
1503     return isLeftToRightDirection() ? borderBottom() : borderTop();
1504 }
1505
1506 unsigned short RenderStyle::borderBeforeWidth() const
1507 {
1508     switch (writingMode()) {
1509     case TopToBottomWritingMode:
1510         return borderTopWidth();
1511     case BottomToTopWritingMode:
1512         return borderBottomWidth();
1513     case LeftToRightWritingMode:
1514         return borderLeftWidth();
1515     case RightToLeftWritingMode:
1516         return borderRightWidth();
1517     }
1518     ASSERT_NOT_REACHED();
1519     return borderTopWidth();
1520 }
1521
1522 unsigned short RenderStyle::borderAfterWidth() const
1523 {
1524     switch (writingMode()) {
1525     case TopToBottomWritingMode:
1526         return borderBottomWidth();
1527     case BottomToTopWritingMode:
1528         return borderTopWidth();
1529     case LeftToRightWritingMode:
1530         return borderRightWidth();
1531     case RightToLeftWritingMode:
1532         return borderLeftWidth();
1533     }
1534     ASSERT_NOT_REACHED();
1535     return borderBottomWidth();
1536 }
1537
1538 unsigned short RenderStyle::borderStartWidth() const
1539 {
1540     if (isHorizontalWritingMode())
1541         return isLeftToRightDirection() ? borderLeftWidth() : borderRightWidth();
1542     return isLeftToRightDirection() ? borderTopWidth() : borderBottomWidth();
1543 }
1544
1545 unsigned short RenderStyle::borderEndWidth() const
1546 {
1547     if (isHorizontalWritingMode())
1548         return isLeftToRightDirection() ? borderRightWidth() : borderLeftWidth();
1549     return isLeftToRightDirection() ? borderBottomWidth() : borderTopWidth();
1550 }
1551
1552 void RenderStyle::setMarginStart(Length margin)
1553 {
1554     if (isHorizontalWritingMode()) {
1555         if (isLeftToRightDirection())
1556             setMarginLeft(margin);
1557         else
1558             setMarginRight(margin);
1559     } else {
1560         if (isLeftToRightDirection())
1561             setMarginTop(margin);
1562         else
1563             setMarginBottom(margin);
1564     }
1565 }
1566
1567 void RenderStyle::setMarginEnd(Length margin)
1568 {
1569     if (isHorizontalWritingMode()) {
1570         if (isLeftToRightDirection())
1571             setMarginRight(margin);
1572         else
1573             setMarginLeft(margin);
1574     } else {
1575         if (isLeftToRightDirection())
1576             setMarginBottom(margin);
1577         else
1578             setMarginTop(margin);
1579     }
1580 }
1581
1582 TextEmphasisMark RenderStyle::textEmphasisMark() const
1583 {
1584     TextEmphasisMark mark = static_cast<TextEmphasisMark>(rareInheritedData->textEmphasisMark);
1585     if (mark != TextEmphasisMarkAuto)
1586         return mark;
1587
1588     if (isHorizontalWritingMode())
1589         return TextEmphasisMarkDot;
1590
1591     return TextEmphasisMarkSesame;
1592 }
1593
1594 #if ENABLE(TOUCH_EVENTS)
1595 Color RenderStyle::initialTapHighlightColor()
1596 {
1597     return RenderTheme::tapHighlightColor();
1598 }
1599 #endif
1600
1601 LayoutBoxExtent RenderStyle::imageOutsets(const NinePieceImage& image) const
1602 {
1603     return LayoutBoxExtent(NinePieceImage::computeOutset(image.outset().top(), borderTopWidth()),
1604                            NinePieceImage::computeOutset(image.outset().right(), borderRightWidth()),
1605                            NinePieceImage::computeOutset(image.outset().bottom(), borderBottomWidth()),
1606                            NinePieceImage::computeOutset(image.outset().left(), borderLeftWidth()));
1607 }
1608
1609 void RenderStyle::setBorderImageSource(PassRefPtr<StyleImage> image)
1610 {
1611     if (surround->border.m_image.image() == image.get())
1612         return;
1613     surround.access()->border.m_image.setImage(image);
1614 }
1615
1616 void RenderStyle::setBorderImageSlices(LengthBox slices)
1617 {
1618     if (surround->border.m_image.imageSlices() == slices)
1619         return;
1620     surround.access()->border.m_image.setImageSlices(slices);
1621 }
1622
1623 void RenderStyle::setBorderImageWidth(LengthBox slices)
1624 {
1625     if (surround->border.m_image.borderSlices() == slices)
1626         return;
1627     surround.access()->border.m_image.setBorderSlices(slices);
1628 }
1629
1630 void RenderStyle::setBorderImageOutset(LengthBox outset)
1631 {
1632     if (surround->border.m_image.outset() == outset)
1633         return;
1634     surround.access()->border.m_image.setOutset(outset);
1635 }
1636
1637 void RenderStyle::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
1638 {
1639     MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::CSS);
1640     info.addMember(m_box, "box");
1641     info.addMember(visual, "visual");
1642     // FIXME: m_background contains RefPtr<StyleImage> that might need to be instrumented.
1643     info.addMember(m_background, "background");
1644     // FIXME: surrond contains some fields e.g. BorderData that might need to be instrumented.
1645     info.addMember(surround, "surround");
1646     info.addMember(rareNonInheritedData, "rareNonInheritedData");
1647     info.addMember(rareInheritedData, "rareInheritedData");
1648     // FIXME: inherited contains StyleImage and Font fields that might need to be instrumented.
1649     info.addMember(inherited, "inherited");
1650     info.addMember(m_cachedPseudoStyles, "cachedPseudoStyles");
1651 #if ENABLE(SVG)
1652     info.addMember(m_svgStyle, "svgStyle");
1653 #endif
1654     info.addMember(inherited_flags, "inherited_flags");
1655     info.addMember(noninherited_flags, "noninherited_flags");
1656 }
1657
1658 } // namespace WebCore