329 lines
12 KiB
C++
329 lines
12 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* (C) 2001 Peter Kelly (pmk@post.com)
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* (C) 2001 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2004-2018 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "StyledElement.h"
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#include "AttributeChangeInvalidation.h"
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#include "CSSComputedStyleDeclaration.h"
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#include "CSSImageValue.h"
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#include "CSSParser.h"
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#include "CSSPrimitiveValue.h"
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#include "CSSPropertyParser.h"
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#include "CSSStyleSheet.h"
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#include "CSSUnparsedValue.h"
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#include "CSSValuePool.h"
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#include "CachedResource.h"
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#include "ContentSecurityPolicy.h"
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#include "DOMTokenList.h"
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#include "ElementRareData.h"
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#include "HTMLElement.h"
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#include "HTMLImageElement.h"
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#include "HTMLParserIdioms.h"
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#include "InspectorInstrumentation.h"
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#include "PropertySetCSSStyleDeclaration.h"
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#include "ScriptableDocumentParser.h"
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#include "StyleProperties.h"
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#include "StylePropertyMap.h"
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#include "StyleResolver.h"
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#include <wtf/HashFunctions.h>
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#include <wtf/IsoMallocInlines.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(StyledElement);
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COMPILE_ASSERT(sizeof(StyledElement) == sizeof(Element), styledelement_should_remain_same_size_as_element);
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using namespace HTMLNames;
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void StyledElement::synchronizeStyleAttributeInternalImpl()
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{
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ASSERT(elementData());
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ASSERT(elementData()->styleAttributeIsDirty());
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elementData()->setStyleAttributeIsDirty(false);
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if (const StyleProperties* inlineStyle = this->inlineStyle())
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setSynchronizedLazyAttribute(styleAttr, inlineStyle->asText());
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}
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StyledElement::~StyledElement()
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{
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if (PropertySetCSSStyleDeclaration* cssomWrapper = inlineStyleCSSOMWrapper())
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cssomWrapper->clearParentElement();
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}
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CSSStyleDeclaration& StyledElement::cssomStyle()
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{
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return ensureMutableInlineStyle().ensureInlineCSSStyleDeclaration(*this);
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}
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#if ENABLE(CSS_TYPED_OM)
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class StyledElementInlineStylePropertyMap final : public StylePropertyMap {
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public:
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static Ref<StylePropertyMap> create(StyledElement& element)
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{
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return adoptRef(*new StyledElementInlineStylePropertyMap(element));
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}
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private:
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RefPtr<CSSStyleValue> get(const String& property) const final
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{
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ASSERT(m_element); // Hitting this assertion would imply a GC bug. Element is collected while this property map is alive.
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if (!m_element)
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return nullptr;
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return extractInlineProperty(property, *m_element);
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}
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explicit StyledElementInlineStylePropertyMap(StyledElement& element)
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: m_element(&element)
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{
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}
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void clearElement() override { m_element = nullptr; }
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static RefPtr<CSSStyleValue> extractInlineProperty(const String& name, StyledElement& element)
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{
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if (!element.inlineStyle())
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return nullptr;
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if (isCustomPropertyName(name)) {
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auto value = element.inlineStyle()->getCustomPropertyCSSValue(name);
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return StylePropertyMapReadOnly::customPropertyValueOrDefault(name, element.document(), value.get(), &element);
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}
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CSSPropertyID propertyID = cssPropertyID(name);
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if (!propertyID)
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return nullptr;
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auto value = element.inlineStyle()->getPropertyCSSValue(propertyID);
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return StylePropertyMapReadOnly::reifyValue(value.get(), element.document(), &element);
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}
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StyledElement* m_element { nullptr };
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};
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StylePropertyMap& StyledElement::ensureAttributeStyleMap()
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{
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if (!attributeStyleMap())
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setAttributeStyleMap(StyledElementInlineStylePropertyMap::create(*this));
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return *attributeStyleMap();
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}
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#endif
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MutableStyleProperties& StyledElement::ensureMutableInlineStyle()
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{
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RefPtr<StyleProperties>& inlineStyle = ensureUniqueElementData().m_inlineStyle;
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if (!inlineStyle)
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inlineStyle = MutableStyleProperties::create(strictToCSSParserMode(isHTMLElement() && !document().inQuirksMode()));
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else if (!is<MutableStyleProperties>(*inlineStyle))
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inlineStyle = inlineStyle->mutableCopy();
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return downcast<MutableStyleProperties>(*inlineStyle);
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}
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void StyledElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason reason)
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{
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if (oldValue != newValue) {
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if (name == styleAttr)
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styleAttributeChanged(newValue, reason);
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else if (hasPresentationalHintsForAttribute(name)) {
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elementData()->setPresentationalHintStyleIsDirty(true);
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invalidateStyle();
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}
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}
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Element::attributeChanged(name, oldValue, newValue, reason);
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}
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PropertySetCSSStyleDeclaration* StyledElement::inlineStyleCSSOMWrapper()
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{
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if (!inlineStyle() || !inlineStyle()->hasCSSOMWrapper())
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return 0;
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PropertySetCSSStyleDeclaration* cssomWrapper = ensureMutableInlineStyle().cssStyleDeclaration();
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ASSERT(cssomWrapper && cssomWrapper->parentElement() == this);
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return cssomWrapper;
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}
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static bool usesStyleBasedEditability(const StyleProperties& properties)
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{
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return properties.getPropertyCSSValue(CSSPropertyWebkitUserModify);
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}
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void StyledElement::setInlineStyleFromString(const AtomString& newStyleString)
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{
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auto& inlineStyle = elementData()->m_inlineStyle;
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// Avoid redundant work if we're using shared attribute data with already parsed inline style.
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if (inlineStyle && !elementData()->isUnique())
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return;
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// We reconstruct the property set instead of mutating if there is no CSSOM wrapper.
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// This makes wrapperless property sets immutable and so cacheable.
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if (inlineStyle && !is<MutableStyleProperties>(*inlineStyle))
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inlineStyle = nullptr;
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if (!inlineStyle)
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inlineStyle = CSSParser::parseInlineStyleDeclaration(newStyleString, this);
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else
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downcast<MutableStyleProperties>(*inlineStyle).parseDeclaration(newStyleString, document());
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if (usesStyleBasedEditability(*inlineStyle))
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document().setHasElementUsingStyleBasedEditability();
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}
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void StyledElement::styleAttributeChanged(const AtomString& newStyleString, AttributeModificationReason reason)
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{
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auto startLineNumber = WTF::OrdinalNumber::beforeFirst();
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if (document().scriptableDocumentParser() && !document().isInDocumentWrite())
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startLineNumber = document().scriptableDocumentParser()->textPosition().m_line;
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if (reason == ModifiedByCloning || document().contentSecurityPolicy()->allowInlineStyle(document().url().string(), startLineNumber, { }, isInUserAgentShadowTree()))
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setInlineStyleFromString(newStyleString);
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elementData()->setStyleAttributeIsDirty(false);
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invalidateStyle();
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InspectorInstrumentation::didInvalidateStyleAttr(*this);
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}
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void StyledElement::invalidateStyleAttribute()
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{
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if (auto* inlineStyle = this->inlineStyle()) {
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if (usesStyleBasedEditability(*inlineStyle))
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document().setHasElementUsingStyleBasedEditability();
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}
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elementData()->setStyleAttributeIsDirty(true);
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invalidateStyle();
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// In the rare case of selectors like "[style] ~ div" we need to synchronize immediately to invalidate.
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if (styleResolver().ruleSets().hasComplexSelectorsForStyleAttribute()) {
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if (auto* inlineStyle = this->inlineStyle()) {
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elementData()->setStyleAttributeIsDirty(false);
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auto newValue = inlineStyle->asText();
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Style::AttributeChangeInvalidation styleInvalidation(*this, styleAttr, attributeWithoutSynchronization(styleAttr), newValue);
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setSynchronizedLazyAttribute(styleAttr, newValue);
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}
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}
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}
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void StyledElement::inlineStyleChanged()
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{
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invalidateStyleAttribute();
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InspectorInstrumentation::didInvalidateStyleAttr(*this);
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}
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bool StyledElement::setInlineStyleProperty(CSSPropertyID propertyID, CSSValueID identifier, bool important)
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{
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ensureMutableInlineStyle().setProperty(propertyID, CSSValuePool::singleton().createIdentifierValue(identifier), important);
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inlineStyleChanged();
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return true;
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}
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bool StyledElement::setInlineStyleProperty(CSSPropertyID propertyID, CSSPropertyID identifier, bool important)
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{
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ensureMutableInlineStyle().setProperty(propertyID, CSSValuePool::singleton().createIdentifierValue(identifier), important);
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inlineStyleChanged();
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return true;
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}
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bool StyledElement::setInlineStyleProperty(CSSPropertyID propertyID, double value, CSSUnitType unit, bool important)
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{
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ensureMutableInlineStyle().setProperty(propertyID, CSSValuePool::singleton().createValue(value, unit), important);
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inlineStyleChanged();
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return true;
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}
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bool StyledElement::setInlineStyleProperty(CSSPropertyID propertyID, const String& value, bool important)
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{
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bool changes = ensureMutableInlineStyle().setProperty(propertyID, value, important, CSSParserContext(document()));
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if (changes)
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inlineStyleChanged();
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return changes;
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}
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bool StyledElement::removeInlineStyleProperty(CSSPropertyID propertyID)
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{
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if (!inlineStyle())
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return false;
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bool changes = ensureMutableInlineStyle().removeProperty(propertyID);
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if (changes)
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inlineStyleChanged();
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return changes;
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}
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void StyledElement::removeAllInlineStyleProperties()
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{
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if (!inlineStyle() || inlineStyle()->isEmpty())
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return;
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ensureMutableInlineStyle().clear();
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inlineStyleChanged();
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}
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void StyledElement::addSubresourceAttributeURLs(ListHashSet<URL>& urls) const
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{
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auto* inlineStyle = this->inlineStyle();
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if (!inlineStyle)
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return;
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inlineStyle->traverseSubresources([&] (auto& resource) {
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urls.add(resource.url());
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return false;
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});
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}
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void StyledElement::rebuildPresentationalHintStyle()
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{
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auto style = MutableStyleProperties::create(isSVGElement() ? SVGAttributeMode : HTMLQuirksMode);
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for (const Attribute& attribute : attributesIterator())
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collectPresentationalHintsForAttribute(attribute.name(), attribute.value(), style);
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if (is<HTMLImageElement>(*this))
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collectExtraStyleForPresentationalHints(style);
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// ShareableElementData doesn't store presentation attribute style, so make sure we have a UniqueElementData.
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UniqueElementData& elementData = ensureUniqueElementData();
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elementData.setPresentationalHintStyleIsDirty(false);
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if (style->isEmpty())
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elementData.m_presentationalHintStyle = nullptr;
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else
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elementData.m_presentationalHintStyle = WTFMove(style);
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}
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void StyledElement::addPropertyToPresentationalHintStyle(MutableStyleProperties& style, CSSPropertyID propertyID, CSSValueID identifier)
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{
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style.setProperty(propertyID, CSSValuePool::singleton().createIdentifierValue(identifier));
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}
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void StyledElement::addPropertyToPresentationalHintStyle(MutableStyleProperties& style, CSSPropertyID propertyID, double value, CSSUnitType unit)
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{
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style.setProperty(propertyID, CSSValuePool::singleton().createValue(value, unit));
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}
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void StyledElement::addPropertyToPresentationalHintStyle(MutableStyleProperties& style, CSSPropertyID propertyID, const String& value)
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{
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style.setProperty(propertyID, value, false, CSSParserContext(document()));
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}
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}
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