1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 *
20 */
21
22#pragma once
23
24#include "CSSSelector.h"
25#include "CSSToLengthConversionData.h"
26#include "CSSToStyleMap.h"
27#include "DocumentRuleSets.h"
28#include "InspectorCSSOMWrappers.h"
29#include "MediaQueryEvaluator.h"
30#include "RenderStyle.h"
31#include "RuleSet.h"
32#include "SelectorChecker.h"
33#include <bitset>
34#include <memory>
35#include <wtf/Bitmap.h>
36#include <wtf/HashMap.h>
37#include <wtf/RefPtr.h>
38#include <wtf/Vector.h>
39#include <wtf/text/AtomicStringHash.h>
40#include <wtf/text/StringHash.h>
41
42namespace WebCore {
43
44class CSSCursorImageValue;
45class CSSFontFace;
46class CSSFontFaceRule;
47class CSSFontValue;
48class CSSImageGeneratorValue;
49class CSSImageSetValue;
50class CSSImageValue;
51class CSSPageRule;
52class CSSPrimitiveValue;
53class CSSProperty;
54class CSSStyleSheet;
55class CSSValue;
56class ContainerNode;
57class Document;
58class Element;
59class Frame;
60class FrameView;
61class KeyframeList;
62class KeyframeValue;
63class MediaQueryEvaluator;
64class Node;
65class RenderScrollbar;
66class RuleData;
67class RuleSet;
68class SelectorFilter;
69class Settings;
70class StyleCachedImage;
71class StyleGeneratedImage;
72class StyleImage;
73class StyleRuleKeyframe;
74class StyleProperties;
75class StyleRule;
76class StyleRuleKeyframes;
77class StyleRulePage;
78class StyleSheet;
79class StyleSheetList;
80class StyledElement;
81class SVGSVGElement;
82class ViewportStyleResolver;
83struct ResourceLoaderOptions;
84
85// MatchOnlyUserAgentRules is used in media queries, where relative units
86// are interpreted according to the document root element style, and styled only
87// from the User Agent Stylesheet rules.
88
89enum class RuleMatchingBehavior: uint8_t {
90 MatchAllRules,
91 MatchAllRulesExcludingSMIL,
92 MatchOnlyUserAgentRules,
93};
94
95enum class CascadeLevel: uint8_t {
96 UserAgentLevel,
97 AuthorLevel,
98 UserLevel
99};
100
101class PseudoStyleRequest {
102public:
103 PseudoStyleRequest(PseudoId pseudoId, RenderScrollbar* scrollbar = nullptr, ScrollbarPart scrollbarPart = NoPart)
104 : pseudoId(pseudoId)
105 , scrollbarPart(scrollbarPart)
106 , scrollbar(scrollbar)
107 {
108 }
109
110 PseudoId pseudoId;
111 ScrollbarPart scrollbarPart;
112 RenderScrollbar* scrollbar;
113};
114
115struct ElementStyle {
116 ElementStyle(std::unique_ptr<RenderStyle> renderStyle, std::unique_ptr<Style::Relations> relations = { })
117 : renderStyle(WTFMove(renderStyle))
118 , relations(WTFMove(relations))
119 { }
120
121 std::unique_ptr<RenderStyle> renderStyle;
122 std::unique_ptr<Style::Relations> relations;
123};
124
125// This class selects a RenderStyle for a given element based on a collection of stylesheets.
126class StyleResolver {
127 WTF_MAKE_NONCOPYABLE(StyleResolver); WTF_MAKE_FAST_ALLOCATED;
128public:
129 StyleResolver(Document&);
130 ~StyleResolver();
131
132 ElementStyle styleForElement(const Element&, const RenderStyle* parentStyle, const RenderStyle* parentBoxStyle = nullptr, RuleMatchingBehavior = RuleMatchingBehavior::MatchAllRules, const SelectorFilter* = nullptr);
133
134 void keyframeStylesForAnimation(const Element&, const RenderStyle*, KeyframeList&);
135
136 std::unique_ptr<RenderStyle> pseudoStyleForElement(const Element&, const PseudoStyleRequest&, const RenderStyle& parentStyle, const SelectorFilter* = nullptr);
137
138 std::unique_ptr<RenderStyle> styleForPage(int pageIndex);
139 std::unique_ptr<RenderStyle> defaultStyleForElement();
140
141 RenderStyle* style() const { return m_state.style(); }
142 const RenderStyle* parentStyle() const { return m_state.parentStyle(); }
143 const RenderStyle* rootElementStyle() const { return m_state.rootElementStyle(); }
144 const Element* element() { return m_state.element(); }
145 Document& document() { return m_document; }
146 const Document& document() const { return m_document; }
147 const Settings& settings() const { return m_document.settings(); }
148
149 void appendAuthorStyleSheets(const Vector<RefPtr<CSSStyleSheet>>&);
150
151 DocumentRuleSets& ruleSets() { return m_ruleSets; }
152 const DocumentRuleSets& ruleSets() const { return m_ruleSets; }
153
154 const MediaQueryEvaluator& mediaQueryEvaluator() const { return m_mediaQueryEvaluator; }
155
156 RenderStyle* overrideDocumentElementStyle() const { return m_overrideDocumentElementStyle; }
157 void setOverrideDocumentElementStyle(RenderStyle* style) { m_overrideDocumentElementStyle = style; }
158
159 void addCurrentSVGFontFaceRules();
160 static void adjustSVGElementStyle(const SVGElement&, RenderStyle&);
161
162 void setNewStateWithElement(const Element&);
163 std::unique_ptr<RenderStyle> styleForKeyframe(const RenderStyle*, const StyleRuleKeyframe*, KeyframeValue&);
164 bool isAnimationNameValid(const String&);
165
166public:
167 // These methods will give back the set of rules that matched for a given element (or a pseudo-element).
168 enum CSSRuleFilter {
169 UAAndUserCSSRules = 1 << 1,
170 AuthorCSSRules = 1 << 2,
171 EmptyCSSRules = 1 << 3,
172 AllButEmptyCSSRules = UAAndUserCSSRules | AuthorCSSRules,
173 AllCSSRules = AllButEmptyCSSRules | EmptyCSSRules,
174 };
175 Vector<RefPtr<StyleRule>> styleRulesForElement(const Element*, unsigned rulesToInclude = AllButEmptyCSSRules);
176 Vector<RefPtr<StyleRule>> pseudoStyleRulesForElement(const Element*, PseudoId, unsigned rulesToInclude = AllButEmptyCSSRules);
177
178public:
179 struct MatchResult;
180
181 void applyPropertyToStyle(CSSPropertyID, CSSValue*, std::unique_ptr<RenderStyle>);
182 void applyPropertyToCurrentStyle(CSSPropertyID, CSSValue*);
183
184 void updateFont();
185 void initializeFontStyle();
186
187 void setFontSize(FontCascadeDescription&, float size);
188
189public:
190 bool useSVGZoomRules() const;
191 bool useSVGZoomRulesForLength() const;
192
193 static bool colorFromPrimitiveValueIsDerivedFromElement(const CSSPrimitiveValue&);
194 Color colorFromPrimitiveValue(const CSSPrimitiveValue&, bool forVisitedLink = false) const;
195
196 bool hasSelectorForId(const AtomicString&) const;
197 bool hasSelectorForAttribute(const Element&, const AtomicString&) const;
198
199#if ENABLE(CSS_DEVICE_ADAPTATION)
200 ViewportStyleResolver* viewportStyleResolver() { return m_viewportStyleResolver.get(); }
201#endif
202
203 void addViewportDependentMediaQueryResult(const MediaQueryExpression&, bool result);
204 bool hasViewportDependentMediaQueries() const { return !m_viewportDependentMediaQueryResults.isEmpty(); }
205 bool hasMediaQueriesAffectedByViewportChange() const;
206
207 void addAccessibilitySettingsDependentMediaQueryResult(const MediaQueryExpression&, bool result);
208 bool hasAccessibilitySettingsDependentMediaQueries() const { return !m_accessibilitySettingsDependentMediaQueryResults.isEmpty(); }
209 bool hasMediaQueriesAffectedByAccessibilitySettingsChange() const;
210
211 void addAppearanceDependentMediaQueryResult(const MediaQueryExpression&, bool result);
212 bool hasAppearanceDependentMediaQueries() const { return !m_appearanceDependentMediaQueryResults.isEmpty(); }
213 bool hasMediaQueriesAffectedByAppearanceChange() const;
214
215 void addKeyframeStyle(Ref<StyleRuleKeyframes>&&);
216
217 bool usesFirstLineRules() const { return m_ruleSets.features().usesFirstLineRules; }
218 bool usesFirstLetterRules() const { return m_ruleSets.features().usesFirstLetterRules; }
219
220 void invalidateMatchedPropertiesCache();
221
222 void clearCachedPropertiesAffectedByViewportUnits();
223
224 bool createFilterOperations(const CSSValue& inValue, FilterOperations& outOperations);
225
226 struct RuleRange {
227 RuleRange(int& firstRuleIndex, int& lastRuleIndex): firstRuleIndex(firstRuleIndex), lastRuleIndex(lastRuleIndex) { }
228 int& firstRuleIndex;
229 int& lastRuleIndex;
230 };
231
232 struct MatchRanges {
233 MatchRanges() : firstUARule(-1), lastUARule(-1), firstAuthorRule(-1), lastAuthorRule(-1), firstUserRule(-1), lastUserRule(-1) { }
234 int firstUARule;
235 int lastUARule;
236 int firstAuthorRule;
237 int lastAuthorRule;
238 int firstUserRule;
239 int lastUserRule;
240 RuleRange UARuleRange() { return RuleRange(firstUARule, lastUARule); }
241 RuleRange authorRuleRange() { return RuleRange(firstAuthorRule, lastAuthorRule); }
242 RuleRange userRuleRange() { return RuleRange(firstUserRule, lastUserRule); }
243 };
244
245 struct MatchedProperties {
246 MatchedProperties();
247 ~MatchedProperties();
248
249 RefPtr<StyleProperties> properties;
250 uint16_t linkMatchType;
251 uint16_t whitelistType;
252 Style::ScopeOrdinal styleScopeOrdinal;
253 };
254
255 struct MatchResult {
256 MatchResult() : isCacheable(true) { }
257 Vector<StyleRule*, 64> matchedRules;
258 MatchRanges ranges;
259 bool isCacheable;
260
261 const Vector<MatchedProperties, 64>& matchedProperties() const { return m_matchedProperties; }
262
263 void addMatchedProperties(const StyleProperties&, StyleRule* = nullptr, unsigned linkMatchType = SelectorChecker::MatchAll, PropertyWhitelistType = PropertyWhitelistNone, Style::ScopeOrdinal = Style::ScopeOrdinal::Element);
264 private:
265 Vector<MatchedProperties, 64> m_matchedProperties;
266 };
267
268 class CascadedProperties {
269 WTF_MAKE_FAST_ALLOCATED;
270 public:
271 CascadedProperties(TextDirection, WritingMode);
272
273 struct Property {
274 void apply(StyleResolver&, ApplyCascadedPropertyState&);
275
276 CSSPropertyID id;
277 CascadeLevel level;
278 Style::ScopeOrdinal styleScopeOrdinal;
279 CSSValue* cssValue[3];
280 };
281
282 bool hasProperty(CSSPropertyID) const;
283 Property& property(CSSPropertyID);
284
285 void addNormalMatches(const MatchResult&, int startIndex, int endIndex, bool inheritedOnly = false);
286 void addImportantMatches(const MatchResult&, int startIndex, int endIndex, bool inheritedOnly = false);
287
288 void applyDeferredProperties(StyleResolver&, ApplyCascadedPropertyState&);
289
290 HashMap<AtomicString, Property>& customProperties() { return m_customProperties; }
291 bool hasCustomProperty(const String&) const;
292 Property customProperty(const String&) const;
293
294 private:
295 void addMatch(const MatchResult&, unsigned index, bool isImportant, bool inheritedOnly);
296 void set(CSSPropertyID, CSSValue&, unsigned linkMatchType, CascadeLevel, Style::ScopeOrdinal);
297 void setDeferred(CSSPropertyID, CSSValue&, unsigned linkMatchType, CascadeLevel, Style::ScopeOrdinal);
298 static void setPropertyInternal(Property&, CSSPropertyID, CSSValue&, unsigned linkMatchType, CascadeLevel, Style::ScopeOrdinal);
299
300 Property m_properties[numCSSProperties + 2];
301 std::bitset<numCSSProperties + 2> m_propertyIsPresent;
302
303 Vector<Property, 8> m_deferredProperties;
304 HashMap<AtomicString, Property> m_customProperties;
305
306 TextDirection m_direction;
307 WritingMode m_writingMode;
308 };
309
310 void applyCascadedProperties(int firstProperty, int lastProperty, ApplyCascadedPropertyState&);
311 void applyCascadedCustomProperty(const String& name, ApplyCascadedPropertyState&);
312
313private:
314 // This function fixes up the default font size if it detects that the current generic font family has changed. -dwh
315 void checkForGenericFamilyChange(RenderStyle*, const RenderStyle* parentStyle);
316 void checkForZoomChange(RenderStyle*, const RenderStyle* parentStyle);
317#if ENABLE(TEXT_AUTOSIZING)
318 void checkForTextSizeAdjust(RenderStyle*);
319#endif
320
321 void adjustRenderStyle(RenderStyle&, const RenderStyle& parentStyle, const RenderStyle* parentBoxStyle, const Element*);
322 void adjustRenderStyleForSiteSpecificQuirks(RenderStyle&, const Element&);
323
324 std::unique_ptr<GridPosition> adjustNamedGridItemPosition(const NamedGridAreaMap&, const NamedGridLinesMap&, const GridPosition&, GridPositionSide) const;
325
326 void adjustStyleForInterCharacterRuby();
327
328 bool fastRejectSelector(const RuleData&) const;
329
330 enum ShouldUseMatchedPropertiesCache { DoNotUseMatchedPropertiesCache = 0, UseMatchedPropertiesCache };
331 void applyMatchedProperties(const MatchResult&, const Element&, ShouldUseMatchedPropertiesCache = UseMatchedPropertiesCache);
332
333 enum CustomPropertyCycleTracking { Enabled = 0, Disabled };
334 template<CustomPropertyCycleTracking>
335 inline void applyCascadedPropertiesImpl(int firstProperty, int lastProperty, ApplyCascadedPropertyState&);
336
337 void cascadeMatches(CascadedProperties&, const MatchResult&, bool important, int startIndex, int endIndex, bool inheritedOnly);
338
339 void matchPageRules(MatchResult&, RuleSet*, bool isLeftPage, bool isFirstPage, const String& pageName);
340 void matchPageRulesForList(Vector<StyleRulePage*>& matchedRules, const Vector<StyleRulePage*>&, bool isLeftPage, bool isFirstPage, const String& pageName);
341
342 bool isLeftPage(int pageIndex) const;
343 bool isRightPage(int pageIndex) const { return !isLeftPage(pageIndex); }
344 bool isFirstPage(int pageIndex) const;
345 String pageName(int pageIndex) const;
346
347 DocumentRuleSets m_ruleSets;
348
349 typedef HashMap<AtomicStringImpl*, RefPtr<StyleRuleKeyframes>> KeyframesRuleMap;
350 KeyframesRuleMap m_keyframesRuleMap;
351
352public:
353 typedef HashMap<CSSPropertyID, RefPtr<CSSValue>> PendingImagePropertyMap;
354
355 class State {
356 public:
357 State() { }
358 State(const Element&, const RenderStyle* parentStyle, const RenderStyle* documentElementStyle = nullptr, const SelectorFilter* = nullptr);
359
360 public:
361 void clear();
362
363 const Element* element() const { return m_element; }
364
365 void setStyle(std::unique_ptr<RenderStyle>);
366 RenderStyle* style() const { return m_style.get(); }
367 std::unique_ptr<RenderStyle> takeStyle() { return WTFMove(m_style); }
368
369 void setParentStyle(std::unique_ptr<RenderStyle>);
370 const RenderStyle* parentStyle() const { return m_parentStyle; }
371 const RenderStyle* rootElementStyle() const { return m_rootElementStyle; }
372
373 InsideLink elementLinkState() const { return m_elementLinkState; }
374
375 void setApplyPropertyToRegularStyle(bool isApply) { m_applyPropertyToRegularStyle = isApply; }
376 void setApplyPropertyToVisitedLinkStyle(bool isApply) { m_applyPropertyToVisitedLinkStyle = isApply; }
377 bool applyPropertyToRegularStyle() const { return m_applyPropertyToRegularStyle; }
378 bool applyPropertyToVisitedLinkStyle() const { return m_applyPropertyToVisitedLinkStyle; }
379
380 void setFontDirty(bool isDirty) { m_fontDirty = isDirty; }
381 bool fontDirty() const { return m_fontDirty; }
382 void setFontSizeHasViewportUnits(bool hasViewportUnits) { m_fontSizeHasViewportUnits = hasViewportUnits; }
383 bool fontSizeHasViewportUnits() const { return m_fontSizeHasViewportUnits; }
384
385 void cacheBorderAndBackground();
386 bool hasUAAppearance() const { return m_hasUAAppearance; }
387 BorderData borderData() const { return m_borderData; }
388 FillLayer backgroundData() const { return m_backgroundData; }
389 const Color& backgroundColor() const { return m_backgroundColor; }
390
391 const FontCascadeDescription& fontDescription() { return m_style->fontDescription(); }
392 const FontCascadeDescription& parentFontDescription() { return m_parentStyle->fontDescription(); }
393 void setFontDescription(FontCascadeDescription&& fontDescription) { m_fontDirty |= m_style->setFontDescription(WTFMove(fontDescription)); }
394 void setZoom(float f) { m_fontDirty |= m_style->setZoom(f); }
395 void setEffectiveZoom(float f) { m_fontDirty |= m_style->setEffectiveZoom(f); }
396 void setWritingMode(WritingMode writingMode) { m_fontDirty |= m_style->setWritingMode(writingMode); }
397 void setTextOrientation(TextOrientation textOrientation) { m_fontDirty |= m_style->setTextOrientation(textOrientation); }
398
399 bool useSVGZoomRules() const { return m_element && m_element->isSVGElement(); }
400
401 const CSSToLengthConversionData& cssToLengthConversionData() const { return m_cssToLengthConversionData; }
402
403 CascadeLevel cascadeLevel() const { return m_cascadeLevel; }
404 void setCascadeLevel(CascadeLevel level) { m_cascadeLevel = level; }
405 Style::ScopeOrdinal styleScopeOrdinal() const { return m_styleScopeOrdinal; }
406 void setStyleScopeOrdinal(Style::ScopeOrdinal styleScopeOrdinal) { m_styleScopeOrdinal = styleScopeOrdinal; }
407
408 CascadedProperties* authorRollback() const { return m_authorRollback.get(); }
409 CascadedProperties* userRollback() const { return m_userRollback.get(); }
410
411 void setAuthorRollback(std::unique_ptr<CascadedProperties>& rollback) { m_authorRollback = WTFMove(rollback); }
412 void setUserRollback(std::unique_ptr<CascadedProperties>& rollback) { m_userRollback = WTFMove(rollback); }
413
414 const SelectorFilter* selectorFilter() const { return m_selectorFilter; }
415
416 private:
417 void updateConversionData();
418
419 const Element* m_element { nullptr };
420 std::unique_ptr<RenderStyle> m_style;
421 const RenderStyle* m_parentStyle { nullptr };
422 std::unique_ptr<RenderStyle> m_ownedParentStyle;
423 const RenderStyle* m_rootElementStyle { nullptr };
424 std::unique_ptr<CascadedProperties> m_authorRollback;
425 std::unique_ptr<CascadedProperties> m_userRollback;
426
427 const SelectorFilter* m_selectorFilter { nullptr };
428
429 BorderData m_borderData;
430 FillLayer m_backgroundData { FillLayerType::Background };
431 Color m_backgroundColor;
432
433 CSSToLengthConversionData m_cssToLengthConversionData;
434
435 Style::ScopeOrdinal m_styleScopeOrdinal { Style::ScopeOrdinal::Element };
436
437 InsideLink m_elementLinkState { InsideLink::NotInside };
438 CascadeLevel m_cascadeLevel { CascadeLevel::UserAgentLevel };
439
440 bool m_applyPropertyToRegularStyle { true };
441 bool m_applyPropertyToVisitedLinkStyle { false };
442 bool m_fontDirty { false };
443 bool m_fontSizeHasViewportUnits { false };
444 bool m_hasUAAppearance { false };
445 };
446
447 State& state() { return m_state; }
448 const State& state() const { return m_state; }
449
450 RefPtr<StyleImage> styleImage(CSSValue&);
451
452 bool applyPropertyToRegularStyle() const { return m_state.applyPropertyToRegularStyle(); }
453 bool applyPropertyToVisitedLinkStyle() const { return m_state.applyPropertyToVisitedLinkStyle(); }
454
455 CascadeLevel cascadeLevel() const { return m_state.cascadeLevel(); }
456 void setCascadeLevel(CascadeLevel level) { m_state.setCascadeLevel(level); }
457
458 CascadedProperties* cascadedPropertiesForRollback(const MatchResult&);
459
460 CSSToStyleMap* styleMap() { return &m_styleMap; }
461 InspectorCSSOMWrappers& inspectorCSSOMWrappers() { return m_inspectorCSSOMWrappers; }
462 const FontCascadeDescription& fontDescription() { return m_state.fontDescription(); }
463 const FontCascadeDescription& parentFontDescription() { return m_state.parentFontDescription(); }
464 void setFontDescription(FontCascadeDescription&& fontDescription) { m_state.setFontDescription(WTFMove(fontDescription)); }
465 void setZoom(float f) { m_state.setZoom(f); }
466 void setEffectiveZoom(float f) { m_state.setEffectiveZoom(f); }
467 void setWritingMode(WritingMode writingMode) { m_state.setWritingMode(writingMode); }
468 void setTextOrientation(TextOrientation textOrientation) { m_state.setTextOrientation(textOrientation); }
469
470 RefPtr<CSSValue> resolvedVariableValue(CSSPropertyID, const CSSValue&, ApplyCascadedPropertyState&) const;
471
472private:
473 void cacheBorderAndBackground();
474
475 void applyProperty(CSSPropertyID, CSSValue*, ApplyCascadedPropertyState&, SelectorChecker::LinkMatchMask = SelectorChecker::MatchDefault);
476
477 void applySVGProperty(CSSPropertyID, CSSValue*);
478
479 static unsigned computeMatchedPropertiesHash(const MatchedProperties*, unsigned size);
480 struct MatchedPropertiesCacheItem {
481 Vector<MatchedProperties> matchedProperties;
482 MatchRanges ranges;
483 std::unique_ptr<RenderStyle> renderStyle;
484 std::unique_ptr<RenderStyle> parentRenderStyle;
485
486 MatchedPropertiesCacheItem(const MatchResult& matchResult, const RenderStyle* style, const RenderStyle* parentStyle)
487 : ranges(matchResult.ranges)
488 , renderStyle(RenderStyle::clonePtr(*style))
489 , parentRenderStyle(RenderStyle::clonePtr(*parentStyle))
490 {
491 // Assign rather than copy-construct so we only allocate as much vector capacity as needed.
492 matchedProperties = matchResult.matchedProperties();
493 }
494 MatchedPropertiesCacheItem() = default;
495 };
496 const MatchedPropertiesCacheItem* findFromMatchedPropertiesCache(unsigned hash, const MatchResult&);
497 void addToMatchedPropertiesCache(const RenderStyle*, const RenderStyle* parentStyle, unsigned hash, const MatchResult&);
498
499 // Every N additions to the matched declaration cache trigger a sweep where entries holding
500 // the last reference to a style declaration are garbage collected.
501 void sweepMatchedPropertiesCache();
502
503 typedef HashMap<unsigned, MatchedPropertiesCacheItem> MatchedPropertiesCache;
504 MatchedPropertiesCache m_matchedPropertiesCache;
505
506 Timer m_matchedPropertiesCacheSweepTimer;
507
508 MediaQueryEvaluator m_mediaQueryEvaluator;
509 std::unique_ptr<RenderStyle> m_rootDefaultStyle;
510
511 Document& m_document;
512
513 RenderStyle* m_overrideDocumentElementStyle { nullptr };
514
515 Vector<MediaQueryResult> m_viewportDependentMediaQueryResults;
516 Vector<MediaQueryResult> m_accessibilitySettingsDependentMediaQueryResults;
517 Vector<MediaQueryResult> m_appearanceDependentMediaQueryResults;
518
519#if ENABLE(CSS_DEVICE_ADAPTATION)
520 RefPtr<ViewportStyleResolver> m_viewportStyleResolver;
521#endif
522
523 CSSToStyleMap m_styleMap;
524 InspectorCSSOMWrappers m_inspectorCSSOMWrappers;
525
526 State m_state;
527
528 unsigned m_matchedPropertiesCacheAdditionsSinceLastSweep { 0 };
529
530 bool m_matchAuthorAndUserStyles { true };
531 // See if we still have crashes where StyleResolver gets deleted early.
532 bool m_isDeleted { false };
533
534 friend bool operator==(const MatchedProperties&, const MatchedProperties&);
535 friend bool operator!=(const MatchedProperties&, const MatchedProperties&);
536 friend bool operator==(const MatchRanges&, const MatchRanges&);
537 friend bool operator!=(const MatchRanges&, const MatchRanges&);
538};
539
540// State to use when applying properties, to keep track of which custom and high-priority
541// properties have been resolved.
542struct ApplyCascadedPropertyState {
543 StyleResolver* styleResolver;
544 StyleResolver::CascadedProperties* cascade;
545 const StyleResolver::MatchResult* matchResult;
546 Bitmap<numCSSProperties> appliedProperties = { };
547 HashSet<String> appliedCustomProperties = { };
548 Bitmap<numCSSProperties> inProgressProperties = { };
549 HashSet<String> inProgressPropertiesCustom = { };
550};
551
552
553inline bool StyleResolver::hasSelectorForAttribute(const Element& element, const AtomicString &attributeName) const
554{
555 ASSERT(!attributeName.isEmpty());
556 if (element.isHTMLElement())
557 return m_ruleSets.features().attributeCanonicalLocalNamesInRules.contains(attributeName);
558 return m_ruleSets.features().attributeLocalNamesInRules.contains(attributeName);
559}
560
561inline bool StyleResolver::hasSelectorForId(const AtomicString& idValue) const
562{
563 ASSERT(!idValue.isEmpty());
564 return m_ruleSets.features().idsInRules.contains(idValue);
565}
566
567} // namespace WebCore
568