5b7fa6e37347a3a19a6992ced135c08360ff535d
[WebKit-https.git] / Source / WebCore / inspector / InspectorStyleSheet.cpp
1 /*
2  * Copyright (C) 2010, Google Inc. All rights reserved.
3  *
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5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1.  Redistributions of source code must retain the above copyright
8  *     notice, this list of conditions and the following disclaimer.
9  * 2.  Redistributions in binary form must reproduce the above copyright
10  *     notice, this list of conditions and the following disclaimer in the
11  *     documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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24
25 #include "config.h"
26
27 #if ENABLE(INSPECTOR)
28
29 #include "InspectorStyleSheet.h"
30
31 #include "CSSImportRule.h"
32 #include "CSSMediaRule.h"
33 #include "CSSParser.h"
34 #include "CSSPropertyNames.h"
35 #include "CSSPropertySourceData.h"
36 #include "CSSRule.h"
37 #include "CSSRuleList.h"
38 #include "CSSStyleRule.h"
39 #include "CSSStyleSheet.h"
40 #include "CSSSupportsRule.h"
41 #include "ContentSecurityPolicy.h"
42 #include "Document.h"
43 #include "Element.h"
44 #include "HTMLHeadElement.h"
45 #include "HTMLNames.h"
46 #include "HTMLParserIdioms.h"
47 #include "HTMLStyleElement.h"
48 #include "InspectorCSSAgent.h"
49 #include "InspectorPageAgent.h"
50 #include "Node.h"
51 #include "SVGElement.h"
52 #include "SVGNames.h"
53 #include "StyleProperties.h"
54 #include "StyleResolver.h"
55 #include "StyleRule.h"
56 #include "StyleRuleImport.h"
57 #include "StyleSheetContents.h"
58 #include "StyleSheetList.h"
59 #include "WebKitCSSKeyframesRule.h"
60 #include <inspector/ContentSearchUtilities.h>
61 #include <inspector/InspectorValues.h>
62 #include <wtf/Vector.h>
63 #include <wtf/text/StringBuilder.h>
64 #include <yarr/RegularExpression.h>
65
66 using Inspector::Protocol::Array;
67 using WebCore::RuleSourceDataList;
68 using WebCore::CSSRuleSourceData;
69
70 class ParsedStyleSheet {
71     WTF_MAKE_FAST_ALLOCATED;
72 public:
73     ParsedStyleSheet();
74
75     const String& text() const { ASSERT(m_hasText); return m_text; }
76     void setText(const String& text);
77     bool hasText() const { return m_hasText; }
78     RuleSourceDataList* sourceData() const { return m_sourceData.get(); }
79     void setSourceData(std::unique_ptr<RuleSourceDataList>);
80     bool hasSourceData() const { return m_sourceData != nullptr; }
81     PassRefPtr<WebCore::CSSRuleSourceData> ruleSourceDataAt(unsigned) const;
82
83 private:
84
85     String m_text;
86     bool m_hasText;
87     std::unique_ptr<RuleSourceDataList> m_sourceData;
88 };
89
90 ParsedStyleSheet::ParsedStyleSheet()
91     : m_hasText(false)
92 {
93 }
94
95 void ParsedStyleSheet::setText(const String& text)
96 {
97     m_hasText = true;
98     m_text = text;
99     setSourceData(nullptr);
100 }
101
102 static void flattenSourceData(RuleSourceDataList* dataList, RuleSourceDataList* target)
103 {
104     for (size_t i = 0; i < dataList->size(); ++i) {
105         RefPtr<CSSRuleSourceData>& data = dataList->at(i);
106         if (data->type == CSSRuleSourceData::STYLE_RULE)
107             target->append(data);
108         else if (data->type == CSSRuleSourceData::MEDIA_RULE)
109             flattenSourceData(&data->childRules, target);
110 #if ENABLE(CSS3_CONDITIONAL_RULES)
111         else if (data->type == CSSRuleSourceData::SUPPORTS_RULE)
112             flattenSourceData(&data->childRules, target);
113 #endif
114     }
115 }
116
117 void ParsedStyleSheet::setSourceData(std::unique_ptr<RuleSourceDataList> sourceData)
118 {
119     if (!sourceData) {
120         m_sourceData.reset();
121         return;
122     }
123
124     m_sourceData = std::make_unique<RuleSourceDataList>();
125
126     // FIXME: This is a temporary solution to retain the original flat sourceData structure
127     // containing only style rules, even though CSSParser now provides the full rule source data tree.
128     // Normally, we should just assign m_sourceData = sourceData;
129     flattenSourceData(sourceData.get(), m_sourceData.get());
130 }
131
132 PassRefPtr<WebCore::CSSRuleSourceData> ParsedStyleSheet::ruleSourceDataAt(unsigned index) const
133 {
134     if (!hasSourceData() || index >= m_sourceData->size())
135         return nullptr;
136
137     return m_sourceData->at(index);
138 }
139
140 using namespace Inspector;
141
142 namespace WebCore {
143
144 enum MediaListSource {
145     MediaListSourceLinkedSheet,
146     MediaListSourceInlineSheet,
147     MediaListSourceMediaRule,
148     MediaListSourceImportRule
149 };
150
151 static PassRefPtr<Inspector::Protocol::CSS::SourceRange> buildSourceRangeObject(const SourceRange& range, Vector<size_t>* lineEndings)
152 {
153     if (!lineEndings)
154         return nullptr;
155     TextPosition start = ContentSearchUtilities::textPositionFromOffset(range.start, *lineEndings);
156     TextPosition end = ContentSearchUtilities::textPositionFromOffset(range.end, *lineEndings);
157
158     RefPtr<Inspector::Protocol::CSS::SourceRange> result = Inspector::Protocol::CSS::SourceRange::create()
159         .setStartLine(start.m_line.zeroBasedInt())
160         .setStartColumn(start.m_column.zeroBasedInt())
161         .setEndLine(end.m_line.zeroBasedInt())
162         .setEndColumn(end.m_column.zeroBasedInt());
163     return result.release();
164 }
165
166 static PassRefPtr<Inspector::Protocol::CSS::CSSMedia> buildMediaObject(const MediaList* media, MediaListSource mediaListSource, const String& sourceURL)
167 {
168     // Make certain compilers happy by initializing |source| up-front.
169     Inspector::Protocol::CSS::CSSMedia::Source source = Inspector::Protocol::CSS::CSSMedia::Source::InlineSheet;
170     switch (mediaListSource) {
171     case MediaListSourceMediaRule:
172         source = Inspector::Protocol::CSS::CSSMedia::Source::MediaRule;
173         break;
174     case MediaListSourceImportRule:
175         source = Inspector::Protocol::CSS::CSSMedia::Source::ImportRule;
176         break;
177     case MediaListSourceLinkedSheet:
178         source = Inspector::Protocol::CSS::CSSMedia::Source::LinkedSheet;
179         break;
180     case MediaListSourceInlineSheet:
181         source = Inspector::Protocol::CSS::CSSMedia::Source::InlineSheet;
182         break;
183     }
184
185     RefPtr<Inspector::Protocol::CSS::CSSMedia> mediaObject = Inspector::Protocol::CSS::CSSMedia::create()
186         .setText(media->mediaText())
187         .setSource(source);
188
189     if (!sourceURL.isEmpty()) {
190         mediaObject->setSourceURL(sourceURL);
191         mediaObject->setSourceLine(media->queries()->lastLine());
192     }
193     return mediaObject.release();
194 }
195
196 static PassRefPtr<CSSRuleList> asCSSRuleList(CSSStyleSheet* styleSheet)
197 {
198     if (!styleSheet)
199         return nullptr;
200
201     RefPtr<StaticCSSRuleList> list = StaticCSSRuleList::create();
202     Vector<RefPtr<CSSRule>>& listRules = list->rules();
203     for (unsigned i = 0, size = styleSheet->length(); i < size; ++i) {
204         CSSRule* item = styleSheet->item(i);
205         if (item->type() == CSSRule::CHARSET_RULE)
206             continue;
207         listRules.append(item);
208     }
209     return list.release();
210 }
211
212 static PassRefPtr<CSSRuleList> asCSSRuleList(CSSRule* rule)
213 {
214     if (!rule)
215         return nullptr;
216
217     if (rule->type() == CSSRule::MEDIA_RULE)
218         return &toCSSMediaRule(rule)->cssRules();
219
220     if (rule->type() == CSSRule::WEBKIT_KEYFRAMES_RULE)
221         return &static_cast<WebKitCSSKeyframesRule*>(rule)->cssRules();
222
223 #if ENABLE(CSS3_CONDITIONAL_RULES)
224     if (rule->type() == CSSRule::SUPPORTS_RULE)
225         return &toCSSSupportsRule(rule)->cssRules();
226 #endif
227
228     return nullptr;
229 }
230
231 static void fillMediaListChain(CSSRule* rule, Array<Inspector::Protocol::CSS::CSSMedia>* mediaArray)
232 {
233     MediaList* mediaList;
234     CSSRule* parentRule = rule;
235     String sourceURL;
236     while (parentRule) {
237         CSSStyleSheet* parentStyleSheet = nullptr;
238         bool isMediaRule = true;
239         if (parentRule->type() == CSSRule::MEDIA_RULE) {
240             CSSMediaRule* mediaRule = toCSSMediaRule(parentRule);
241             mediaList = mediaRule->media();
242             parentStyleSheet = mediaRule->parentStyleSheet();
243         } else if (parentRule->type() == CSSRule::IMPORT_RULE) {
244             CSSImportRule* importRule = toCSSImportRule(parentRule);
245             mediaList = &importRule->media();
246             parentStyleSheet = importRule->parentStyleSheet();
247             isMediaRule = false;
248         } else
249             mediaList = nullptr;
250
251         if (parentStyleSheet) {
252             sourceURL = parentStyleSheet->contents().baseURL();
253             if (sourceURL.isEmpty())
254                 sourceURL = InspectorDOMAgent::documentURLString(parentStyleSheet->ownerDocument());
255         } else
256             sourceURL = "";
257
258         if (mediaList && mediaList->length())
259             mediaArray->addItem(buildMediaObject(mediaList, isMediaRule ? MediaListSourceMediaRule : MediaListSourceImportRule, sourceURL));
260
261         if (parentRule->parentRule())
262             parentRule = parentRule->parentRule();
263         else {
264             CSSStyleSheet* styleSheet = parentRule->parentStyleSheet();
265             while (styleSheet) {
266                 mediaList = styleSheet->media();
267                 if (mediaList && mediaList->length()) {
268                     Document* doc = styleSheet->ownerDocument();
269                     if (doc)
270                         sourceURL = doc->url();
271                     else if (!styleSheet->contents().baseURL().isEmpty())
272                         sourceURL = styleSheet->contents().baseURL();
273                     else
274                         sourceURL = "";
275                     mediaArray->addItem(buildMediaObject(mediaList, styleSheet->ownerNode() ? MediaListSourceLinkedSheet : MediaListSourceInlineSheet, sourceURL));
276                 }
277                 parentRule = styleSheet->ownerRule();
278                 if (parentRule)
279                     break;
280                 styleSheet = styleSheet->parentStyleSheet();
281             }
282         }
283     }
284 }
285
286 static std::unique_ptr<CSSParser> createCSSParser(Document* document)
287 {
288     return std::make_unique<CSSParser>(document ? CSSParserContext(*document) : strictCSSParserContext());
289 }
290
291 PassRefPtr<InspectorStyle> InspectorStyle::create(const InspectorCSSId& styleId, PassRefPtr<CSSStyleDeclaration> style, InspectorStyleSheet* parentStyleSheet)
292 {
293     return adoptRef(new InspectorStyle(styleId, style, parentStyleSheet));
294 }
295
296 InspectorStyle::InspectorStyle(const InspectorCSSId& styleId, PassRefPtr<CSSStyleDeclaration> style, InspectorStyleSheet* parentStyleSheet)
297     : m_styleId(styleId)
298     , m_style(style)
299     , m_parentStyleSheet(parentStyleSheet)
300     , m_formatAcquired(false)
301 {
302     ASSERT(m_style);
303 }
304
305 InspectorStyle::~InspectorStyle()
306 {
307 }
308
309 PassRefPtr<Inspector::Protocol::CSS::CSSStyle> InspectorStyle::buildObjectForStyle() const
310 {
311     RefPtr<Inspector::Protocol::CSS::CSSStyle> result = styleWithProperties();
312     if (!m_styleId.isEmpty())
313         result->setStyleId(m_styleId.asProtocolValue<Inspector::Protocol::CSS::CSSStyleId>());
314
315     result->setWidth(m_style->getPropertyValue("width"));
316     result->setHeight(m_style->getPropertyValue("height"));
317
318     RefPtr<CSSRuleSourceData> sourceData = extractSourceData();
319     if (sourceData)
320         result->setRange(buildSourceRangeObject(sourceData->ruleBodyRange, m_parentStyleSheet->lineEndings().get()));
321
322     return result.release();
323 }
324
325 PassRefPtr<Inspector::Protocol::Array<Inspector::Protocol::CSS::CSSComputedStyleProperty>> InspectorStyle::buildArrayForComputedStyle() const
326 {
327     RefPtr<Inspector::Protocol::Array<Inspector::Protocol::CSS::CSSComputedStyleProperty>> result = Inspector::Protocol::Array<Inspector::Protocol::CSS::CSSComputedStyleProperty>::create();
328     Vector<InspectorStyleProperty> properties;
329     populateAllProperties(&properties);
330
331     for (Vector<InspectorStyleProperty>::iterator it = properties.begin(), itEnd = properties.end(); it != itEnd; ++it) {
332         const CSSPropertySourceData& propertyEntry = it->sourceData;
333         RefPtr<Inspector::Protocol::CSS::CSSComputedStyleProperty> entry = Inspector::Protocol::CSS::CSSComputedStyleProperty::create()
334             .setName(propertyEntry.name)
335             .setValue(propertyEntry.value);
336         result->addItem(entry);
337     }
338
339     return result.release();
340 }
341
342 // This method does the following preprocessing of |propertyText| with |overwrite| == false and |index| past the last active property:
343 // - If the last property (if present) has no closing ";", the ";" is prepended to the current |propertyText| value.
344 // - A heuristic formatting is attempted to retain the style structure.
345 //
346 // The propertyText (if not empty) is checked to be a valid style declaration (containing at least one property). If not,
347 // the method returns false (denoting an error).
348 bool InspectorStyle::setPropertyText(unsigned index, const String& propertyText, bool overwrite, String* oldText, ExceptionCode& ec)
349 {
350     ASSERT(m_parentStyleSheet);
351     DEPRECATED_DEFINE_STATIC_LOCAL(String, bogusPropertyName, (ASCIILiteral("-webkit-boguz-propertee")));
352
353     if (!m_parentStyleSheet->ensureParsedDataReady()) {
354         ec = NOT_FOUND_ERR;
355         return false;
356     }
357
358     if (propertyText.stripWhiteSpace().length()) {
359         RefPtr<MutableStyleProperties> tempMutableStyle = MutableStyleProperties::create();
360         RefPtr<CSSRuleSourceData> sourceData = CSSRuleSourceData::create(CSSRuleSourceData::STYLE_RULE);
361         Document* ownerDocument = m_parentStyleSheet->pageStyleSheet() ? m_parentStyleSheet->pageStyleSheet()->ownerDocument() : nullptr;
362         createCSSParser(ownerDocument)->parseDeclaration(tempMutableStyle.get(), propertyText + " " + bogusPropertyName + ": none", sourceData, &m_style->parentStyleSheet()->contents());
363         Vector<CSSPropertySourceData>& propertyData = sourceData->styleSourceData->propertyData;
364         unsigned propertyCount = propertyData.size();
365
366         // At least one property + the bogus property added just above should be present.
367         if (propertyCount < 2) {
368             ec = SYNTAX_ERR;
369             return false;
370         }
371
372         // Check for a proper propertyText termination (the parser could at least restore to the PROPERTY_NAME state).
373         if (propertyData.at(propertyCount - 1).name != bogusPropertyName) {
374             ec = SYNTAX_ERR;
375             return false;
376         }
377     }
378
379     RefPtr<CSSRuleSourceData> sourceData = extractSourceData();
380     if (!sourceData) {
381         ec = NOT_FOUND_ERR;
382         return false;
383     }
384
385     String text;
386     bool success = styleText(&text);
387     if (!success) {
388         ec = NOT_FOUND_ERR;
389         return false;
390     }
391
392     Vector<InspectorStyleProperty> allProperties;
393     populateAllProperties(&allProperties);
394
395     InspectorStyleTextEditor editor(&allProperties, &m_disabledProperties, text, newLineAndWhitespaceDelimiters());
396     if (overwrite) {
397         if (index >= allProperties.size()) {
398             ec = INDEX_SIZE_ERR;
399             return false;
400         }
401         *oldText = allProperties.at(index).rawText;
402         editor.replaceProperty(index, propertyText);
403     } else
404         editor.insertProperty(index, propertyText, sourceData->ruleBodyRange.length());
405
406     return applyStyleText(editor.styleText());
407 }
408
409 bool InspectorStyle::toggleProperty(unsigned index, bool disable, ExceptionCode& ec)
410 {
411     ASSERT(m_parentStyleSheet);
412     if (!m_parentStyleSheet->ensureParsedDataReady()) {
413         ec = NO_MODIFICATION_ALLOWED_ERR;
414         return false;
415     }
416
417     RefPtr<CSSRuleSourceData> sourceData = extractSourceData();
418     if (!sourceData) {
419         ec = NOT_FOUND_ERR;
420         return false;
421     }
422
423     String text;
424     bool success = styleText(&text);
425     if (!success) {
426         ec = NOT_FOUND_ERR;
427         return false;
428     }
429
430     Vector<InspectorStyleProperty> allProperties;
431     populateAllProperties(&allProperties);
432     if (index >= allProperties.size()) {
433         ec = INDEX_SIZE_ERR;
434         return false;
435     }
436
437     InspectorStyleProperty& property = allProperties.at(index);
438     if (property.disabled == disable)
439         return true; // Idempotent operation.
440
441     InspectorStyleTextEditor editor(&allProperties, &m_disabledProperties, text, newLineAndWhitespaceDelimiters());
442     if (disable)
443         editor.disableProperty(index);
444     else
445         editor.enableProperty(index);
446
447     return applyStyleText(editor.styleText());
448 }
449
450 bool InspectorStyle::getText(String* result) const
451 {
452     // Precondition: m_parentStyleSheet->ensureParsedDataReady() has been called successfully.
453     RefPtr<CSSRuleSourceData> sourceData = extractSourceData();
454     if (!sourceData)
455         return false;
456
457     String styleSheetText;
458     bool success = m_parentStyleSheet->getText(&styleSheetText);
459     if (!success)
460         return false;
461
462     SourceRange& bodyRange = sourceData->ruleBodyRange;
463     *result = styleSheetText.substring(bodyRange.start, bodyRange.end - bodyRange.start);
464     return true;
465 }
466
467 bool InspectorStyle::populateAllProperties(Vector<InspectorStyleProperty>* result) const
468 {
469     HashSet<String> sourcePropertyNames;
470     unsigned disabledIndex = 0;
471     unsigned disabledLength = m_disabledProperties.size();
472     InspectorStyleProperty disabledProperty;
473     if (disabledIndex < disabledLength)
474         disabledProperty = m_disabledProperties.at(disabledIndex);
475
476     RefPtr<CSSRuleSourceData> sourceData = extractSourceData();
477     Vector<CSSPropertySourceData>* sourcePropertyData = sourceData ? &(sourceData->styleSourceData->propertyData) : nullptr;
478     if (sourcePropertyData) {
479         String styleDeclaration;
480         bool isStyleTextKnown = styleText(&styleDeclaration);
481         ASSERT_UNUSED(isStyleTextKnown, isStyleTextKnown);
482         for (Vector<CSSPropertySourceData>::const_iterator it = sourcePropertyData->begin(); it != sourcePropertyData->end(); ++it) {
483             while (disabledIndex < disabledLength && disabledProperty.sourceData.range.start <= it->range.start) {
484                 result->append(disabledProperty);
485                 if (++disabledIndex < disabledLength)
486                     disabledProperty = m_disabledProperties.at(disabledIndex);
487             }
488             InspectorStyleProperty p(*it, true, false);
489             p.setRawTextFromStyleDeclaration(styleDeclaration);
490             result->append(p);
491             sourcePropertyNames.add(it->name.lower());
492         }
493     }
494
495     while (disabledIndex < disabledLength) {
496         disabledProperty = m_disabledProperties.at(disabledIndex++);
497         result->append(disabledProperty);
498     }
499
500     for (int i = 0, size = m_style->length(); i < size; ++i) {
501         String name = m_style->item(i);
502         if (sourcePropertyNames.contains(name.lower()))
503             continue;
504
505         sourcePropertyNames.add(name.lower());
506         result->append(InspectorStyleProperty(CSSPropertySourceData(name, m_style->getPropertyValue(name), !m_style->getPropertyPriority(name).isEmpty(), true, SourceRange()), false, false));
507     }
508
509     return true;
510 }
511
512 PassRefPtr<Inspector::Protocol::CSS::CSSStyle> InspectorStyle::styleWithProperties() const
513 {
514     Vector<InspectorStyleProperty> properties;
515     populateAllProperties(&properties);
516
517     RefPtr<Array<Inspector::Protocol::CSS::CSSProperty>> propertiesObject = Array<Inspector::Protocol::CSS::CSSProperty>::create();
518     RefPtr<Array<Inspector::Protocol::CSS::ShorthandEntry>> shorthandEntries = Array<Inspector::Protocol::CSS::ShorthandEntry>::create();
519     HashMap<String, RefPtr<Inspector::Protocol::CSS::CSSProperty>> propertyNameToPreviousActiveProperty;
520     HashSet<String> foundShorthands;
521     String previousPriority;
522     String previousStatus;
523     std::unique_ptr<Vector<size_t>> lineEndings(m_parentStyleSheet ? m_parentStyleSheet->lineEndings() : nullptr);
524     RefPtr<CSSRuleSourceData> sourceData = extractSourceData();
525     unsigned ruleBodyRangeStart = sourceData ? sourceData->ruleBodyRange.start : 0;
526
527     for (Vector<InspectorStyleProperty>::iterator it = properties.begin(), itEnd = properties.end(); it != itEnd; ++it) {
528         const CSSPropertySourceData& propertyEntry = it->sourceData;
529         const String& name = propertyEntry.name;
530
531         // Visual Studio disagrees with other compilers as to whether 'class' is needed here.
532 #if COMPILER(MSVC)
533         enum class Inspector::Protocol::CSS::CSSPropertyStatus status;
534 #else
535         enum Inspector::Protocol::CSS::CSSPropertyStatus status;
536 #endif
537         status = it->disabled ? Inspector::Protocol::CSS::CSSPropertyStatus::Disabled : Inspector::Protocol::CSS::CSSPropertyStatus::Active;
538
539         RefPtr<Inspector::Protocol::CSS::CSSProperty> property = Inspector::Protocol::CSS::CSSProperty::create()
540             .setName(name.lower())
541             .setValue(propertyEntry.value);
542
543         propertiesObject->addItem(property);
544
545         // Default "parsedOk" == true.
546         if (!propertyEntry.parsedOk)
547             property->setParsedOk(false);
548         if (it->hasRawText())
549             property->setText(it->rawText);
550
551         // Default "priority" == "".
552         if (propertyEntry.important)
553             property->setPriority("important");
554         if (!it->disabled) {
555             if (it->hasSource) {
556                 ASSERT(sourceData);
557                 property->setImplicit(false);
558                 // The property range is relative to the style body start.
559                 // Should be converted into an absolute range (relative to the stylesheet start)
560                 // for the proper conversion into line:column.
561                 SourceRange absolutePropertyRange = propertyEntry.range;
562                 absolutePropertyRange.start += ruleBodyRangeStart;
563                 absolutePropertyRange.end += ruleBodyRangeStart;
564                 property->setRange(buildSourceRangeObject(absolutePropertyRange, lineEndings.get()));
565
566                 // Parsed property overrides any property with the same name. Non-parsed property overrides
567                 // previous non-parsed property with the same name (if any).
568                 bool shouldInactivate = false;
569                 CSSPropertyID propertyId = cssPropertyID(name);
570                 // Canonicalize property names to treat non-prefixed and vendor-prefixed property names the same (opacity vs. -webkit-opacity).
571                 String canonicalPropertyName = propertyId ? getPropertyNameString(propertyId) : name;
572                 HashMap<String, RefPtr<Inspector::Protocol::CSS::CSSProperty>>::iterator activeIt = propertyNameToPreviousActiveProperty.find(canonicalPropertyName);
573                 if (activeIt != propertyNameToPreviousActiveProperty.end()) {
574                     if (propertyEntry.parsedOk) {
575                         bool successPriority = activeIt->value->getString(Inspector::Protocol::CSS::CSSProperty::Priority, previousPriority);
576                         bool successStatus = activeIt->value->getString(Inspector::Protocol::CSS::CSSProperty::Status, previousStatus);
577                         if (successStatus && previousStatus != "inactive") {
578                             if (propertyEntry.important || !successPriority) // Priority not set == "not important".
579                                 shouldInactivate = true;
580                             else if (status == Inspector::Protocol::CSS::CSSPropertyStatus::Active) {
581                                 // Inactivate a non-important property following the same-named important property.
582                                 status = Inspector::Protocol::CSS::CSSPropertyStatus::Inactive;
583                             }
584                         }
585                     } else {
586                         bool previousParsedOk;
587                         bool success = activeIt->value->getBoolean(Inspector::Protocol::CSS::CSSProperty::ParsedOk, previousParsedOk);
588                         if (success && !previousParsedOk)
589                             shouldInactivate = true;
590                     }
591                 } else
592                     propertyNameToPreviousActiveProperty.set(canonicalPropertyName, property);
593
594                 if (shouldInactivate) {
595                     activeIt->value->setStatus(Inspector::Protocol::CSS::CSSPropertyStatus::Inactive);
596                     propertyNameToPreviousActiveProperty.set(canonicalPropertyName, property);
597                 }
598             } else {
599                 bool implicit = m_style->isPropertyImplicit(name);
600                 // Default "implicit" == false.
601                 if (implicit)
602                     property->setImplicit(true);
603                 status = Inspector::Protocol::CSS::CSSPropertyStatus::Style;
604
605                 String shorthand = m_style->getPropertyShorthand(name);
606                 if (!shorthand.isEmpty()) {
607                     if (!foundShorthands.contains(shorthand)) {
608                         foundShorthands.add(shorthand);
609                         RefPtr<Inspector::Protocol::CSS::ShorthandEntry> entry = Inspector::Protocol::CSS::ShorthandEntry::create()
610                             .setName(shorthand)
611                             .setValue(shorthandValue(shorthand));
612                         shorthandEntries->addItem(entry);
613                     }
614                 }
615             }
616         }
617
618         // Default "status" == "style".
619         if (status != Inspector::Protocol::CSS::CSSPropertyStatus::Style)
620             property->setStatus(status);
621     }
622
623     RefPtr<Inspector::Protocol::CSS::CSSStyle> result = Inspector::Protocol::CSS::CSSStyle::create()
624         .setCssProperties(propertiesObject)
625         .setShorthandEntries(shorthandEntries);
626     return result.release();
627 }
628
629 PassRefPtr<CSSRuleSourceData> InspectorStyle::extractSourceData() const
630 {
631     if (!m_parentStyleSheet || !m_parentStyleSheet->ensureParsedDataReady())
632         return nullptr;
633     return m_parentStyleSheet->ruleSourceDataFor(m_style.get());
634 }
635
636 bool InspectorStyle::setText(const String& text, ExceptionCode& ec)
637 {
638     return m_parentStyleSheet->setStyleText(m_style.get(), text, ec);
639 }
640
641 String InspectorStyle::shorthandValue(const String& shorthandProperty) const
642 {
643     String value = m_style->getPropertyValue(shorthandProperty);
644     if (!value.isEmpty())
645         return value;
646     StringBuilder builder;
647     for (unsigned i = 0; i < m_style->length(); ++i) {
648         String individualProperty = m_style->item(i);
649         if (m_style->getPropertyShorthand(individualProperty) != shorthandProperty)
650             continue;
651         if (m_style->isPropertyImplicit(individualProperty))
652             continue;
653         String individualValue = m_style->getPropertyValue(individualProperty);
654         if (individualValue == "initial")
655             continue;
656         if (!builder.isEmpty())
657             builder.append(' ');
658         builder.append(individualValue);
659     }
660     return builder.toString();
661 }
662
663 String InspectorStyle::shorthandPriority(const String& shorthandProperty) const
664 {
665     String priority = m_style->getPropertyPriority(shorthandProperty);
666     if (priority.isEmpty()) {
667         for (unsigned i = 0; i < m_style->length(); ++i) {
668             String individualProperty = m_style->item(i);
669             if (m_style->getPropertyShorthand(individualProperty) != shorthandProperty)
670                 continue;
671             priority = m_style->getPropertyPriority(individualProperty);
672             break;
673         }
674     }
675     return priority;
676 }
677
678 Vector<String> InspectorStyle::longhandProperties(const String& shorthandProperty) const
679 {
680     Vector<String> properties;
681     HashSet<String> foundProperties;
682     for (unsigned i = 0; i < m_style->length(); ++i) {
683         String individualProperty = m_style->item(i);
684         if (foundProperties.contains(individualProperty) || m_style->getPropertyShorthand(individualProperty) != shorthandProperty)
685             continue;
686
687         foundProperties.add(individualProperty);
688         properties.append(individualProperty);
689     }
690     return properties;
691 }
692
693 NewLineAndWhitespace& InspectorStyle::newLineAndWhitespaceDelimiters() const
694 {
695     DEPRECATED_DEFINE_STATIC_LOCAL(String, defaultPrefix, (ASCIILiteral("    ")));
696
697     if (m_formatAcquired)
698         return m_format;
699
700     RefPtr<CSSRuleSourceData> sourceData = extractSourceData();
701     Vector<CSSPropertySourceData>* sourcePropertyData = sourceData ? &(sourceData->styleSourceData->propertyData) : nullptr;
702     int propertyCount;
703     if (!sourcePropertyData || !(propertyCount = sourcePropertyData->size())) {
704         m_format.first = "\n";
705         m_format.second = defaultPrefix;
706         return m_format; // Do not remember the default formatting and attempt to acquire it later.
707     }
708
709     String text;
710     bool success = styleText(&text);
711     ASSERT_UNUSED(success, success);
712
713     m_formatAcquired = true;
714
715     String candidatePrefix = defaultPrefix;
716     StringBuilder formatLineFeed;
717     StringBuilder prefix;
718     int scanStart = 0;
719     int propertyIndex = 0;
720     bool isFullPrefixScanned = false;
721     bool lineFeedTerminated = false;
722     while (propertyIndex < propertyCount) {
723         const WebCore::CSSPropertySourceData& currentProperty = sourcePropertyData->at(propertyIndex++);
724
725         bool processNextProperty = false;
726         int scanEnd = currentProperty.range.start;
727         for (int i = scanStart; i < scanEnd; ++i) {
728             UChar ch = text[i];
729             bool isLineFeed = isHTMLLineBreak(ch);
730             if (isLineFeed) {
731                 if (!lineFeedTerminated)
732                     formatLineFeed.append(ch);
733                 prefix.clear();
734             } else if (isHTMLSpace(ch))
735                 prefix.append(ch);
736             else {
737                 candidatePrefix = prefix.toString();
738                 prefix.clear();
739                 scanStart = currentProperty.range.end;
740                 ++propertyIndex;
741                 processNextProperty = true;
742                 break;
743             }
744             if (!isLineFeed && formatLineFeed.length())
745                 lineFeedTerminated = true;
746         }
747         if (!processNextProperty) {
748             isFullPrefixScanned = true;
749             break;
750         }
751     }
752
753     m_format.first = formatLineFeed.toString();
754     m_format.second = isFullPrefixScanned ? prefix.toString() : candidatePrefix;
755     return m_format;
756 }
757
758 PassRefPtr<InspectorStyleSheet> InspectorStyleSheet::create(InspectorPageAgent* pageAgent, const String& id, PassRefPtr<CSSStyleSheet> pageStyleSheet, Inspector::Protocol::CSS::StyleSheetOrigin origin, const String& documentURL, Listener* listener)
759 {
760     return adoptRef(new InspectorStyleSheet(pageAgent, id, pageStyleSheet, origin, documentURL, listener));
761 }
762
763 // static
764 String InspectorStyleSheet::styleSheetURL(CSSStyleSheet* pageStyleSheet)
765 {
766     if (pageStyleSheet && !pageStyleSheet->contents().baseURL().isEmpty())
767         return pageStyleSheet->contents().baseURL().string();
768     return emptyString();
769 }
770
771 InspectorStyleSheet::InspectorStyleSheet(InspectorPageAgent* pageAgent, const String& id, PassRefPtr<CSSStyleSheet> pageStyleSheet, Inspector::Protocol::CSS::StyleSheetOrigin origin, const String& documentURL, Listener* listener)
772     : m_pageAgent(pageAgent)
773     , m_id(id)
774     , m_pageStyleSheet(pageStyleSheet)
775     , m_origin(origin)
776     , m_documentURL(documentURL)
777     , m_isRevalidating(false)
778     , m_listener(listener)
779 {
780     m_parsedStyleSheet = new ParsedStyleSheet();
781 }
782
783 InspectorStyleSheet::~InspectorStyleSheet()
784 {
785     delete m_parsedStyleSheet;
786 }
787
788 String InspectorStyleSheet::finalURL() const
789 {
790     String url = styleSheetURL(m_pageStyleSheet.get());
791     return url.isEmpty() ? m_documentURL : url;
792 }
793
794 void InspectorStyleSheet::reparseStyleSheet(const String& text)
795 {
796     {
797         // Have a separate scope for clearRules() (bug 95324).
798         CSSStyleSheet::RuleMutationScope mutationScope(m_pageStyleSheet.get());
799         m_pageStyleSheet->contents().clearRules();
800     }
801     {
802         CSSStyleSheet::RuleMutationScope mutationScope(m_pageStyleSheet.get());
803         m_pageStyleSheet->contents().parseString(text);
804         m_pageStyleSheet->clearChildRuleCSSOMWrappers();
805         m_inspectorStyles.clear();
806         fireStyleSheetChanged();
807     }
808 }
809
810 bool InspectorStyleSheet::setText(const String& text, ExceptionCode& ec)
811 {
812     if (!checkPageStyleSheet(ec))
813         return false;
814     if (!m_parsedStyleSheet)
815         return false;
816
817     m_parsedStyleSheet->setText(text);
818     m_flatRules.clear();
819
820     return true;
821 }
822
823 String InspectorStyleSheet::ruleSelector(const InspectorCSSId& id, ExceptionCode& ec)
824 {
825     CSSStyleRule* rule = ruleForId(id);
826     if (!rule) {
827         ec = NOT_FOUND_ERR;
828         return "";
829     }
830     return rule->selectorText();
831 }
832
833 bool InspectorStyleSheet::setRuleSelector(const InspectorCSSId& id, const String& selector, ExceptionCode& ec)
834 {
835     if (!checkPageStyleSheet(ec))
836         return false;
837     CSSStyleRule* rule = ruleForId(id);
838     if (!rule) {
839         ec = NOT_FOUND_ERR;
840         return false;
841     }
842     CSSStyleSheet* styleSheet = rule->parentStyleSheet();
843     if (!styleSheet || !ensureParsedDataReady()) {
844         ec = NOT_FOUND_ERR;
845         return false;
846     }
847
848     rule->setSelectorText(selector);
849     RefPtr<CSSRuleSourceData> sourceData = ruleSourceDataFor(&rule->style());
850     if (!sourceData) {
851         ec = NOT_FOUND_ERR;
852         return false;
853     }
854
855     String sheetText = m_parsedStyleSheet->text();
856     sheetText.replace(sourceData->ruleHeaderRange.start, sourceData->ruleHeaderRange.length(), selector);
857     m_parsedStyleSheet->setText(sheetText);
858     fireStyleSheetChanged();
859     return true;
860 }
861
862 static bool checkStyleRuleSelector(Document* document, const String& selector)
863 {
864     CSSSelectorList selectorList;
865     createCSSParser(document)->parseSelector(selector, selectorList);
866     return selectorList.isValid();
867 }
868
869 CSSStyleRule* InspectorStyleSheet::addRule(const String& selector, ExceptionCode& ec)
870 {
871     if (!checkPageStyleSheet(ec))
872         return nullptr;
873     if (!checkStyleRuleSelector(m_pageStyleSheet->ownerDocument(), selector)) {
874         ec = SYNTAX_ERR;
875         return nullptr;
876     }
877
878     String text;
879     bool success = getText(&text);
880     if (!success) {
881         ec = NOT_FOUND_ERR;
882         return nullptr;
883     }
884     StringBuilder styleSheetText;
885     styleSheetText.append(text);
886
887     m_pageStyleSheet->addRule(selector, "", ec);
888     if (ec)
889         return nullptr;
890     ASSERT(m_pageStyleSheet->length());
891     unsigned lastRuleIndex = m_pageStyleSheet->length() - 1;
892     CSSRule* rule = m_pageStyleSheet->item(lastRuleIndex);
893     ASSERT(rule);
894
895     CSSStyleRule* styleRule = InspectorCSSAgent::asCSSStyleRule(rule);
896     if (!styleRule) {
897         // What we just added has to be a CSSStyleRule - we cannot handle other types of rules yet.
898         // If it is not a style rule, pretend we never touched the stylesheet.
899         m_pageStyleSheet->deleteRule(lastRuleIndex, ASSERT_NO_EXCEPTION);
900         ec = SYNTAX_ERR;
901         return nullptr;
902     }
903
904     if (!styleSheetText.isEmpty())
905         styleSheetText.append('\n');
906
907     styleSheetText.append(selector);
908     styleSheetText.appendLiteral(" {}");
909     // Using setText() as this operation changes the style sheet rule set.
910     setText(styleSheetText.toString(), ASSERT_NO_EXCEPTION);
911
912     fireStyleSheetChanged();
913
914     return styleRule;
915 }
916
917 bool InspectorStyleSheet::deleteRule(const InspectorCSSId& id, ExceptionCode& ec)
918 {
919     if (!checkPageStyleSheet(ec))
920         return false;
921     RefPtr<CSSStyleRule> rule = ruleForId(id);
922     if (!rule) {
923         ec = NOT_FOUND_ERR;
924         return false;
925     }
926     CSSStyleSheet* styleSheet = rule->parentStyleSheet();
927     if (!styleSheet || !ensureParsedDataReady()) {
928         ec = NOT_FOUND_ERR;
929         return false;
930     }
931
932     RefPtr<CSSRuleSourceData> sourceData = ruleSourceDataFor(&rule->style());
933     if (!sourceData) {
934         ec = NOT_FOUND_ERR;
935         return false;
936     }
937
938     styleSheet->deleteRule(id.ordinal(), ec);
939     // |rule| MAY NOT be addressed after this line!
940
941     if (ec)
942         return false;
943
944     String sheetText = m_parsedStyleSheet->text();
945     sheetText.remove(sourceData->ruleHeaderRange.start, sourceData->ruleBodyRange.end - sourceData->ruleHeaderRange.start + 1);
946     setText(sheetText, ASSERT_NO_EXCEPTION);
947     fireStyleSheetChanged();
948     return true;
949 }
950
951 CSSStyleRule* InspectorStyleSheet::ruleForId(const InspectorCSSId& id) const
952 {
953     if (!m_pageStyleSheet)
954         return nullptr;
955
956     ASSERT(!id.isEmpty());
957     ensureFlatRules();
958     return id.ordinal() >= m_flatRules.size() ? nullptr : m_flatRules.at(id.ordinal()).get();
959
960 }
961
962 PassRefPtr<Inspector::Protocol::CSS::CSSStyleSheetBody> InspectorStyleSheet::buildObjectForStyleSheet()
963 {
964     CSSStyleSheet* styleSheet = pageStyleSheet();
965     if (!styleSheet)
966         return nullptr;
967
968     RefPtr<CSSRuleList> cssRuleList = asCSSRuleList(styleSheet);
969
970     RefPtr<Inspector::Protocol::CSS::CSSStyleSheetBody> result = Inspector::Protocol::CSS::CSSStyleSheetBody::create()
971         .setStyleSheetId(id())
972         .setRules(buildArrayForRuleList(cssRuleList.get()));
973
974     String styleSheetText;
975     bool success = getText(&styleSheetText);
976     if (success)
977         result->setText(styleSheetText);
978
979     return result.release();
980 }
981
982 PassRefPtr<Inspector::Protocol::CSS::CSSStyleSheetHeader> InspectorStyleSheet::buildObjectForStyleSheetInfo()
983 {
984     CSSStyleSheet* styleSheet = pageStyleSheet();
985     if (!styleSheet)
986         return nullptr;
987
988     Document* document = styleSheet->ownerDocument();
989     Frame* frame = document ? document->frame() : nullptr;
990     RefPtr<Inspector::Protocol::CSS::CSSStyleSheetHeader> result = Inspector::Protocol::CSS::CSSStyleSheetHeader::create()
991         .setStyleSheetId(id())
992         .setOrigin(m_origin)
993         .setDisabled(styleSheet->disabled())
994         .setSourceURL(finalURL())
995         .setTitle(styleSheet->title())
996         .setFrameId(m_pageAgent->frameId(frame));
997
998     return result.release();
999 }
1000
1001 static PassRefPtr<Inspector::Protocol::Array<String>> selectorsFromSource(const CSSRuleSourceData* sourceData, const String& sheetText)
1002 {
1003     DEPRECATED_DEFINE_STATIC_LOCAL(JSC::Yarr::RegularExpression, comment, ("/\\*[^]*?\\*/", TextCaseSensitive, JSC::Yarr::MultilineEnabled));
1004     RefPtr<Inspector::Protocol::Array<String>> result = Inspector::Protocol::Array<String>::create();
1005     const SelectorRangeList& ranges = sourceData->selectorRanges;
1006     for (size_t i = 0, size = ranges.size(); i < size; ++i) {
1007         const SourceRange& range = ranges.at(i);
1008         String selector = sheetText.substring(range.start, range.length());
1009
1010         // We don't want to see any comments in the selector components, only the meaningful parts.
1011         replace(selector, comment, "");
1012         result->addItem(selector.stripWhiteSpace());
1013     }
1014     return result.release();
1015 }
1016
1017 PassRefPtr<Inspector::Protocol::CSS::SelectorList> InspectorStyleSheet::buildObjectForSelectorList(CSSStyleRule* rule)
1018 {
1019     RefPtr<CSSRuleSourceData> sourceData;
1020     if (ensureParsedDataReady())
1021         sourceData = ruleSourceDataFor(&rule->style());
1022     RefPtr<Inspector::Protocol::Array<String>> selectors;
1023
1024     // This intentionally does not rely on the source data to avoid catching the trailing comments (before the declaration starting '{').
1025     String selectorText = rule->selectorText();
1026
1027     if (sourceData)
1028         selectors = selectorsFromSource(sourceData.get(), m_parsedStyleSheet->text());
1029     else {
1030         selectors = Inspector::Protocol::Array<String>::create();
1031         const CSSSelectorList& selectorList = rule->styleRule()->selectorList();
1032         for (const CSSSelector* selector = selectorList.first(); selector; selector = CSSSelectorList::next(selector))
1033             selectors->addItem(selector->selectorText());
1034     }
1035     RefPtr<Inspector::Protocol::CSS::SelectorList> result = Inspector::Protocol::CSS::SelectorList::create()
1036         .setSelectors(selectors)
1037         .setText(selectorText)
1038         .release();
1039     if (sourceData)
1040         result->setRange(buildSourceRangeObject(sourceData->ruleHeaderRange, lineEndings().get()));
1041     return result.release();
1042 }
1043
1044 PassRefPtr<Inspector::Protocol::CSS::CSSRule> InspectorStyleSheet::buildObjectForRule(CSSStyleRule* rule)
1045 {
1046     CSSStyleSheet* styleSheet = pageStyleSheet();
1047     if (!styleSheet)
1048         return nullptr;
1049
1050     RefPtr<Inspector::Protocol::CSS::CSSRule> result = Inspector::Protocol::CSS::CSSRule::create()
1051         .setSelectorList(buildObjectForSelectorList(rule))
1052         .setSourceLine(rule->styleRule()->sourceLine())
1053         .setOrigin(m_origin)
1054         .setStyle(buildObjectForStyle(&rule->style()));
1055
1056     // "sourceURL" is present only for regular rules, otherwise "origin" should be used in the frontend.
1057     if (m_origin == Inspector::Protocol::CSS::StyleSheetOrigin::Regular)
1058         result->setSourceURL(finalURL());
1059
1060     if (canBind()) {
1061         InspectorCSSId id(ruleId(rule));
1062         if (!id.isEmpty())
1063             result->setRuleId(id.asProtocolValue<Inspector::Protocol::CSS::CSSRuleId>());
1064     }
1065
1066     RefPtr<Array<Inspector::Protocol::CSS::CSSMedia>> mediaArray = Array<Inspector::Protocol::CSS::CSSMedia>::create();
1067
1068     fillMediaListChain(rule, mediaArray.get());
1069     if (mediaArray->length())
1070         result->setMedia(mediaArray.release());
1071
1072     return result.release();
1073 }
1074
1075 PassRefPtr<Inspector::Protocol::CSS::CSSStyle> InspectorStyleSheet::buildObjectForStyle(CSSStyleDeclaration* style)
1076 {
1077     RefPtr<CSSRuleSourceData> sourceData;
1078     if (ensureParsedDataReady())
1079         sourceData = ruleSourceDataFor(style);
1080
1081     InspectorCSSId id = ruleOrStyleId(style);
1082     if (id.isEmpty()) {
1083         RefPtr<Inspector::Protocol::CSS::CSSStyle> bogusStyle = Inspector::Protocol::CSS::CSSStyle::create()
1084             .setCssProperties(Array<Inspector::Protocol::CSS::CSSProperty>::create())
1085             .setShorthandEntries(Array<Inspector::Protocol::CSS::ShorthandEntry>::create());
1086         return bogusStyle.release();
1087     }
1088     RefPtr<InspectorStyle> inspectorStyle = inspectorStyleForId(id);
1089     RefPtr<Inspector::Protocol::CSS::CSSStyle> result = inspectorStyle->buildObjectForStyle();
1090
1091     // Style text cannot be retrieved without stylesheet, so set cssText here.
1092     if (sourceData) {
1093         String sheetText;
1094         bool success = getText(&sheetText);
1095         if (success) {
1096             const SourceRange& bodyRange = sourceData->ruleBodyRange;
1097             result->setCssText(sheetText.substring(bodyRange.start, bodyRange.end - bodyRange.start));
1098         }
1099     }
1100
1101     return result.release();
1102 }
1103
1104 bool InspectorStyleSheet::setStyleText(const InspectorCSSId& id, const String& text, String* oldText, ExceptionCode& ec)
1105 {
1106     RefPtr<InspectorStyle> inspectorStyle = inspectorStyleForId(id);
1107     if (!inspectorStyle) {
1108         ec = NOT_FOUND_ERR;
1109         return false;
1110     }
1111
1112     if (oldText && !inspectorStyle->getText(oldText))
1113         return false;
1114
1115     bool success = inspectorStyle->setText(text, ec);
1116     if (success)
1117         fireStyleSheetChanged();
1118     return success;
1119 }
1120
1121 bool InspectorStyleSheet::setPropertyText(const InspectorCSSId& id, unsigned propertyIndex, const String& text, bool overwrite, String* oldText, ExceptionCode& ec)
1122 {
1123     RefPtr<InspectorStyle> inspectorStyle = inspectorStyleForId(id);
1124     if (!inspectorStyle) {
1125         ec = NOT_FOUND_ERR;
1126         return false;
1127     }
1128
1129     bool success = inspectorStyle->setPropertyText(propertyIndex, text, overwrite, oldText, ec);
1130     if (success)
1131         fireStyleSheetChanged();
1132     return success;
1133 }
1134
1135 bool InspectorStyleSheet::toggleProperty(const InspectorCSSId& id, unsigned propertyIndex, bool disable, ExceptionCode& ec)
1136 {
1137     RefPtr<InspectorStyle> inspectorStyle = inspectorStyleForId(id);
1138     if (!inspectorStyle) {
1139         ec = NOT_FOUND_ERR;
1140         return false;
1141     }
1142
1143     bool success = inspectorStyle->toggleProperty(propertyIndex, disable, ec);
1144     if (success) {
1145         if (disable)
1146             rememberInspectorStyle(inspectorStyle);
1147         else if (!inspectorStyle->hasDisabledProperties())
1148             forgetInspectorStyle(inspectorStyle->cssStyle());
1149         fireStyleSheetChanged();
1150     }
1151     return success;
1152 }
1153
1154 bool InspectorStyleSheet::getText(String* result) const
1155 {
1156     if (!ensureText())
1157         return false;
1158     *result = m_parsedStyleSheet->text();
1159     return true;
1160 }
1161
1162 CSSStyleDeclaration* InspectorStyleSheet::styleForId(const InspectorCSSId& id) const
1163 {
1164     CSSStyleRule* rule = ruleForId(id);
1165     if (!rule)
1166         return nullptr;
1167
1168     return &rule->style();
1169 }
1170
1171 void InspectorStyleSheet::fireStyleSheetChanged()
1172 {
1173     if (m_listener)
1174         m_listener->styleSheetChanged(this);
1175 }
1176
1177 PassRefPtr<InspectorStyle> InspectorStyleSheet::inspectorStyleForId(const InspectorCSSId& id)
1178 {
1179     CSSStyleDeclaration* style = styleForId(id);
1180     if (!style)
1181         return nullptr;
1182
1183     InspectorStyleMap::iterator it = m_inspectorStyles.find(style);
1184     if (it == m_inspectorStyles.end()) {
1185         RefPtr<InspectorStyle> inspectorStyle = InspectorStyle::create(id, style, this);
1186         return inspectorStyle.release();
1187     }
1188     return it->value;
1189 }
1190
1191 void InspectorStyleSheet::rememberInspectorStyle(RefPtr<InspectorStyle> inspectorStyle)
1192 {
1193     m_inspectorStyles.set(inspectorStyle->cssStyle(), inspectorStyle);
1194 }
1195
1196 void InspectorStyleSheet::forgetInspectorStyle(CSSStyleDeclaration* style)
1197 {
1198     m_inspectorStyles.remove(style);
1199 }
1200
1201 InspectorCSSId InspectorStyleSheet::ruleOrStyleId(CSSStyleDeclaration* style) const
1202 {
1203     unsigned index = ruleIndexByStyle(style);
1204     if (index != UINT_MAX)
1205         return InspectorCSSId(id(), index);
1206     return InspectorCSSId();
1207 }
1208
1209 Document* InspectorStyleSheet::ownerDocument() const
1210 {
1211     return m_pageStyleSheet->ownerDocument();
1212 }
1213
1214 RefPtr<CSSRuleSourceData> InspectorStyleSheet::ruleSourceDataFor(CSSStyleDeclaration* style) const
1215 {
1216     return m_parsedStyleSheet->ruleSourceDataAt(ruleIndexByStyle(style));
1217 }
1218
1219 std::unique_ptr<Vector<size_t>> InspectorStyleSheet::lineEndings() const
1220 {
1221     if (!m_parsedStyleSheet->hasText())
1222         return nullptr;
1223     return ContentSearchUtilities::lineEndings(m_parsedStyleSheet->text());
1224 }
1225
1226 unsigned InspectorStyleSheet::ruleIndexByStyle(CSSStyleDeclaration* pageStyle) const
1227 {
1228     ensureFlatRules();
1229     unsigned index = 0;
1230     for (unsigned i = 0, size = m_flatRules.size(); i < size; ++i) {
1231         if (&m_flatRules.at(i)->style() == pageStyle)
1232             return index;
1233
1234         ++index;
1235     }
1236     return UINT_MAX;
1237 }
1238
1239 bool InspectorStyleSheet::checkPageStyleSheet(ExceptionCode& ec) const
1240 {
1241     if (!m_pageStyleSheet) {
1242         ec = NOT_SUPPORTED_ERR;
1243         return false;
1244     }
1245     return true;
1246 }
1247
1248 bool InspectorStyleSheet::ensureParsedDataReady()
1249 {
1250     return ensureText() && ensureSourceData();
1251 }
1252
1253 bool InspectorStyleSheet::ensureText() const
1254 {
1255     if (!m_parsedStyleSheet)
1256         return false;
1257     if (m_parsedStyleSheet->hasText())
1258         return true;
1259
1260     String text;
1261     bool success = originalStyleSheetText(&text);
1262     if (success)
1263         m_parsedStyleSheet->setText(text);
1264     // No need to clear m_flatRules here - it's empty.
1265
1266     return success;
1267 }
1268
1269 bool InspectorStyleSheet::ensureSourceData()
1270 {
1271     if (m_parsedStyleSheet->hasSourceData())
1272         return true;
1273
1274     if (!m_parsedStyleSheet->hasText())
1275         return false;
1276
1277     RefPtr<StyleSheetContents> newStyleSheet = StyleSheetContents::create();
1278     auto ruleSourceDataResult = std::make_unique<RuleSourceDataList>();
1279     createCSSParser(m_pageStyleSheet->ownerDocument())->parseSheet(newStyleSheet.get(), m_parsedStyleSheet->text(), 0, ruleSourceDataResult.get());
1280     m_parsedStyleSheet->setSourceData(WTF::move(ruleSourceDataResult));
1281     return m_parsedStyleSheet->hasSourceData();
1282 }
1283
1284 void InspectorStyleSheet::ensureFlatRules() const
1285 {
1286     // We are fine with redoing this for empty stylesheets as this will run fast.
1287     if (m_flatRules.isEmpty())
1288         collectFlatRules(asCSSRuleList(pageStyleSheet()), &m_flatRules);
1289 }
1290
1291 bool InspectorStyleSheet::setStyleText(CSSStyleDeclaration* style, const String& text, ExceptionCode& ec)
1292 {
1293     if (!m_pageStyleSheet)
1294         return false;
1295     if (!ensureParsedDataReady())
1296         return false;
1297
1298     String patchedStyleSheetText;
1299     bool success = styleSheetTextWithChangedStyle(style, text, &patchedStyleSheetText);
1300     if (!success)
1301         return false;
1302
1303     InspectorCSSId id = ruleOrStyleId(style);
1304     if (id.isEmpty())
1305         return false;
1306
1307     style->setCssText(text, ec);
1308     if (!ec)
1309         m_parsedStyleSheet->setText(patchedStyleSheetText);
1310
1311     return !ec;
1312 }
1313
1314 bool InspectorStyleSheet::styleSheetTextWithChangedStyle(CSSStyleDeclaration* style, const String& newStyleText, String* result)
1315 {
1316     if (!style)
1317         return false;
1318
1319     if (!ensureParsedDataReady())
1320         return false;
1321
1322     RefPtr<CSSRuleSourceData> sourceData = ruleSourceDataFor(style);
1323     unsigned bodyStart = sourceData->ruleBodyRange.start;
1324     unsigned bodyEnd = sourceData->ruleBodyRange.end;
1325     ASSERT(bodyStart <= bodyEnd);
1326
1327     String text = m_parsedStyleSheet->text();
1328     ASSERT_WITH_SECURITY_IMPLICATION(bodyEnd <= text.length()); // bodyEnd is exclusive
1329
1330     text.replace(bodyStart, bodyEnd - bodyStart, newStyleText);
1331     *result = text;
1332     return true;
1333 }
1334
1335 InspectorCSSId InspectorStyleSheet::ruleId(CSSStyleRule* rule) const
1336 {
1337     return ruleOrStyleId(&rule->style());
1338 }
1339
1340 void InspectorStyleSheet::revalidateStyle(CSSStyleDeclaration* pageStyle)
1341 {
1342     if (m_isRevalidating)
1343         return;
1344
1345     m_isRevalidating = true;
1346     ensureFlatRules();
1347     for (unsigned i = 0, size = m_flatRules.size(); i < size; ++i) {
1348         CSSStyleRule* parsedRule = m_flatRules.at(i).get();
1349         if (&parsedRule->style() == pageStyle) {
1350             if (parsedRule->styleRule()->properties().asText() != pageStyle->cssText()) {
1351                 // Clear the disabled properties for the invalid style here.
1352                 m_inspectorStyles.remove(pageStyle);
1353
1354                 ExceptionCode ec = 0;
1355                 setStyleText(pageStyle, pageStyle->cssText(), ec);
1356             }
1357             break;
1358         }
1359     }
1360     m_isRevalidating = false;
1361 }
1362
1363 bool InspectorStyleSheet::originalStyleSheetText(String* result) const
1364 {
1365     bool success = inlineStyleSheetText(result);
1366     if (!success)
1367         success = resourceStyleSheetText(result);
1368     return success;
1369 }
1370
1371 bool InspectorStyleSheet::resourceStyleSheetText(String* result) const
1372 {
1373     if (m_origin == Inspector::Protocol::CSS::StyleSheetOrigin::User || m_origin == Inspector::Protocol::CSS::StyleSheetOrigin::UserAgent)
1374         return false;
1375
1376     if (!m_pageStyleSheet || !ownerDocument() || !ownerDocument()->frame())
1377         return false;
1378
1379     String error;
1380     bool base64Encoded;
1381     InspectorPageAgent::resourceContent(error, ownerDocument()->frame(), URL(ParsedURLString, m_pageStyleSheet->href()), result, &base64Encoded);
1382     return error.isEmpty() && !base64Encoded;
1383 }
1384
1385 bool InspectorStyleSheet::inlineStyleSheetText(String* result) const
1386 {
1387     if (!m_pageStyleSheet)
1388         return false;
1389
1390     Node* ownerNode = m_pageStyleSheet->ownerNode();
1391     if (!is<Element>(ownerNode))
1392         return false;
1393     Element& ownerElement = downcast<Element>(*ownerNode);
1394
1395     if (!is<HTMLStyleElement>(ownerElement) && !is<SVGStyleElement>(ownerElement))
1396         return false;
1397     *result = ownerElement.textContent();
1398     return true;
1399 }
1400
1401 PassRefPtr<Inspector::Protocol::Array<Inspector::Protocol::CSS::CSSRule>> InspectorStyleSheet::buildArrayForRuleList(CSSRuleList* ruleList)
1402 {
1403     RefPtr<Inspector::Protocol::Array<Inspector::Protocol::CSS::CSSRule>> result = Inspector::Protocol::Array<Inspector::Protocol::CSS::CSSRule>::create();
1404     if (!ruleList)
1405         return result.release();
1406
1407     RefPtr<CSSRuleList> refRuleList = ruleList;
1408     CSSStyleRuleVector rules;
1409     collectFlatRules(refRuleList, &rules);
1410
1411     for (unsigned i = 0, size = rules.size(); i < size; ++i)
1412         result->addItem(buildObjectForRule(rules.at(i).get()));
1413
1414     return result.release();
1415 }
1416
1417 void InspectorStyleSheet::collectFlatRules(PassRefPtr<CSSRuleList> ruleList, CSSStyleRuleVector* result)
1418 {
1419     if (!ruleList)
1420         return;
1421
1422     for (unsigned i = 0, size = ruleList->length(); i < size; ++i) {
1423         CSSRule* rule = ruleList->item(i);
1424         CSSStyleRule* styleRule = InspectorCSSAgent::asCSSStyleRule(rule);
1425         if (styleRule)
1426             result->append(styleRule);
1427         else {
1428             RefPtr<CSSRuleList> childRuleList = asCSSRuleList(rule);
1429             if (childRuleList)
1430                 collectFlatRules(childRuleList, result);
1431         }
1432     }
1433 }
1434
1435 PassRefPtr<InspectorStyleSheetForInlineStyle> InspectorStyleSheetForInlineStyle::create(InspectorPageAgent* pageAgent, const String& id, PassRefPtr<Element> element, Inspector::Protocol::CSS::StyleSheetOrigin origin, Listener* listener)
1436 {
1437     return adoptRef(new InspectorStyleSheetForInlineStyle(pageAgent, id, element, origin, listener));
1438 }
1439
1440 InspectorStyleSheetForInlineStyle::InspectorStyleSheetForInlineStyle(InspectorPageAgent* pageAgent, const String& id, PassRefPtr<Element> element, Inspector::Protocol::CSS::StyleSheetOrigin origin, Listener* listener)
1441     : InspectorStyleSheet(pageAgent, id, nullptr, origin, "", listener)
1442     , m_element(element)
1443     , m_ruleSourceData(nullptr)
1444     , m_isStyleTextValid(false)
1445 {
1446     ASSERT(m_element);
1447     m_inspectorStyle = InspectorStyle::create(InspectorCSSId(id, 0), inlineStyle(), this);
1448     m_styleText = m_element->isStyledElement() ? m_element->getAttribute("style").string() : String();
1449 }
1450
1451 void InspectorStyleSheetForInlineStyle::didModifyElementAttribute()
1452 {
1453     m_isStyleTextValid = false;
1454     if (m_element->isStyledElement() && m_element->style() != m_inspectorStyle->cssStyle())
1455         m_inspectorStyle = InspectorStyle::create(InspectorCSSId(id(), 0), inlineStyle(), this);
1456     m_ruleSourceData.clear();
1457 }
1458
1459 bool InspectorStyleSheetForInlineStyle::getText(String* result) const
1460 {
1461     if (!m_isStyleTextValid) {
1462         m_styleText = elementStyleText();
1463         m_isStyleTextValid = true;
1464     }
1465     *result = m_styleText;
1466     return true;
1467 }
1468
1469 bool InspectorStyleSheetForInlineStyle::setStyleText(CSSStyleDeclaration* style, const String& text, ExceptionCode& ec)
1470 {
1471     ASSERT_UNUSED(style, style == inlineStyle());
1472
1473     {
1474         InspectorCSSAgent::InlineStyleOverrideScope overrideScope(&m_element->document());
1475         m_element->setAttribute("style", text, ec);
1476     }
1477
1478     m_styleText = text;
1479     m_isStyleTextValid = true;
1480     m_ruleSourceData.clear();
1481     return !ec;
1482 }
1483
1484 std::unique_ptr<Vector<size_t>> InspectorStyleSheetForInlineStyle::lineEndings() const
1485 {
1486     return ContentSearchUtilities::lineEndings(elementStyleText());
1487 }
1488
1489 Document* InspectorStyleSheetForInlineStyle::ownerDocument() const
1490 {
1491     return &m_element->document();
1492 }
1493
1494 bool InspectorStyleSheetForInlineStyle::ensureParsedDataReady()
1495 {
1496     // The "style" property value can get changed indirectly, e.g. via element.style.borderWidth = "2px".
1497     const String& currentStyleText = elementStyleText();
1498     if (m_styleText != currentStyleText) {
1499         m_ruleSourceData.clear();
1500         m_styleText = currentStyleText;
1501         m_isStyleTextValid = true;
1502     }
1503
1504     if (m_ruleSourceData)
1505         return true;
1506
1507     m_ruleSourceData = CSSRuleSourceData::create(CSSRuleSourceData::STYLE_RULE);
1508     bool success = getStyleAttributeRanges(m_ruleSourceData.get());
1509     if (!success)
1510         return false;
1511
1512     return true;
1513 }
1514
1515 PassRefPtr<InspectorStyle> InspectorStyleSheetForInlineStyle::inspectorStyleForId(const InspectorCSSId& id)
1516 {
1517     ASSERT_UNUSED(id, !id.ordinal());
1518     return m_inspectorStyle;
1519 }
1520
1521 CSSStyleDeclaration* InspectorStyleSheetForInlineStyle::inlineStyle() const
1522 {
1523     return m_element->style();
1524 }
1525
1526 const String& InspectorStyleSheetForInlineStyle::elementStyleText() const
1527 {
1528     return m_element->getAttribute("style").string();
1529 }
1530
1531 bool InspectorStyleSheetForInlineStyle::getStyleAttributeRanges(CSSRuleSourceData* result) const
1532 {
1533     if (!m_element->isStyledElement())
1534         return false;
1535
1536     if (m_styleText.isEmpty()) {
1537         result->ruleBodyRange.start = 0;
1538         result->ruleBodyRange.end = 0;
1539         return true;
1540     }
1541
1542     RefPtr<MutableStyleProperties> tempDeclaration = MutableStyleProperties::create();
1543     createCSSParser(&m_element->document())->parseDeclaration(tempDeclaration.get(), m_styleText, result, &m_element->document().elementSheet().contents());
1544     return true;
1545 }
1546
1547 } // namespace WebCore
1548
1549 #endif // ENABLE(INSPECTOR)