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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Peter Kelly (pmk@post.com)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2008, 2010, 2014 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "StyledElement.h"
#include "CSSImageValue.h"
#include "CSSParser.h"
#include "CSSStyleSheet.h"
#include "CSSValuePool.h"
#include "CachedResource.h"
#include "ContentSecurityPolicy.h"
#include "DOMTokenList.h"
#include "HTMLElement.h"
#include "HTMLParserIdioms.h"
#include "InspectorInstrumentation.h"
#include "PropertySetCSSStyleDeclaration.h"
#include "ScriptableDocumentParser.h"
#include "StyleProperties.h"
#include "StyleResolver.h"
#include <wtf/HashFunctions.h>
namespace WebCore {
COMPILE_ASSERT(sizeof(StyledElement) == sizeof(Element), styledelement_should_remain_same_size_as_element);
using namespace HTMLNames;
void StyledElement::synchronizeStyleAttributeInternal(StyledElement* styledElement)
{
ASSERT(styledElement->elementData());
ASSERT(styledElement->elementData()->styleAttributeIsDirty());
styledElement->elementData()->setStyleAttributeIsDirty(false);
if (const StyleProperties* inlineStyle = styledElement->inlineStyle())
styledElement->setSynchronizedLazyAttribute(styleAttr, inlineStyle->asText());
}
StyledElement::~StyledElement()
{
if (PropertySetCSSStyleDeclaration* cssomWrapper = inlineStyleCSSOMWrapper())
cssomWrapper->clearParentElement();
}
CSSStyleDeclaration* StyledElement::cssomStyle()
{
return ensureMutableInlineStyle().ensureInlineCSSStyleDeclaration(this);
}
MutableStyleProperties& StyledElement::ensureMutableInlineStyle()
{
RefPtr<StyleProperties>& inlineStyle = ensureUniqueElementData().m_inlineStyle;
if (!inlineStyle)
inlineStyle = MutableStyleProperties::create(strictToCSSParserMode(isHTMLElement() && !document().inQuirksMode()));
else if (!is<MutableStyleProperties>(*inlineStyle))
inlineStyle = inlineStyle->mutableCopy();
return downcast<MutableStyleProperties>(*inlineStyle);
}
void StyledElement::attributeChanged(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason reason)
{
if (oldValue != newValue) {
if (name == styleAttr)
styleAttributeChanged(newValue, reason);
else if (isPresentationAttribute(name)) {
elementData()->setPresentationAttributeStyleIsDirty(true);
invalidateStyle();
}
}
Element::attributeChanged(name, oldValue, newValue, reason);
}
PropertySetCSSStyleDeclaration* StyledElement::inlineStyleCSSOMWrapper()
{
if (!inlineStyle() || !inlineStyle()->hasCSSOMWrapper())
return 0;
PropertySetCSSStyleDeclaration* cssomWrapper = ensureMutableInlineStyle().cssStyleDeclaration();
ASSERT(cssomWrapper && cssomWrapper->parentElement() == this);
return cssomWrapper;
}
static bool usesStyleBasedEditability(const StyleProperties& properties)
{
return properties.getPropertyCSSValue(CSSPropertyWebkitUserModify);
}
void StyledElement::setInlineStyleFromString(const AtomicString& newStyleString)
{
RefPtr<StyleProperties>& inlineStyle = elementData()->m_inlineStyle;
// Avoid redundant work if we're using shared attribute data with already parsed inline style.
if (inlineStyle && !elementData()->isUnique())
return;
// We reconstruct the property set instead of mutating if there is no CSSOM wrapper.
// This makes wrapperless property sets immutable and so cacheable.
if (inlineStyle && !is<MutableStyleProperties>(*inlineStyle))
inlineStyle = nullptr;
if (!inlineStyle)
inlineStyle = CSSParser::parseInlineStyleDeclaration(newStyleString, this);
else
downcast<MutableStyleProperties>(*inlineStyle).parseDeclaration(newStyleString, document());
if (usesStyleBasedEditability(*inlineStyle))
document().setHasElementUsingStyleBasedEditability();
}
void StyledElement::styleAttributeChanged(const AtomicString& newStyleString, AttributeModificationReason reason)
{
WTF::OrdinalNumber startLineNumber = WTF::OrdinalNumber::beforeFirst();
if (document().scriptableDocumentParser() && !document().isInDocumentWrite())
startLineNumber = document().scriptableDocumentParser()->textPosition().m_line;
if (newStyleString.isNull()) {
if (PropertySetCSSStyleDeclaration* cssomWrapper = inlineStyleCSSOMWrapper())
cssomWrapper->clearParentElement();
ensureUniqueElementData().m_inlineStyle = nullptr;
} else if (reason == ModifiedByCloning || document().contentSecurityPolicy()->allowInlineStyle(document().url(), startLineNumber, String(), isInUserAgentShadowTree()))
setInlineStyleFromString(newStyleString);
elementData()->setStyleAttributeIsDirty(false);
invalidateStyle();
InspectorInstrumentation::didInvalidateStyleAttr(document(), *this);
}
void StyledElement::invalidateStyleAttribute()
{
if (usesStyleBasedEditability(*inlineStyle()))
document().setHasElementUsingStyleBasedEditability();
elementData()->setStyleAttributeIsDirty(true);
invalidateStyle();
}
void StyledElement::inlineStyleChanged()
{
invalidateStyleAttribute();
InspectorInstrumentation::didInvalidateStyleAttr(document(), *this);
}
bool StyledElement::setInlineStyleProperty(CSSPropertyID propertyID, CSSValueID identifier, bool important)
{
ensureMutableInlineStyle().setProperty(propertyID, CSSValuePool::singleton().createIdentifierValue(identifier), important);
inlineStyleChanged();
return true;
}
bool StyledElement::setInlineStyleProperty(CSSPropertyID propertyID, CSSPropertyID identifier, bool important)
{
ensureMutableInlineStyle().setProperty(propertyID, CSSValuePool::singleton().createIdentifierValue(identifier), important);
inlineStyleChanged();
return true;
}
bool StyledElement::setInlineStyleProperty(CSSPropertyID propertyID, double value, CSSPrimitiveValue::UnitType unit, bool important)
{
ensureMutableInlineStyle().setProperty(propertyID, CSSValuePool::singleton().createValue(value, unit), important);
inlineStyleChanged();
return true;
}
bool StyledElement::setInlineStyleProperty(CSSPropertyID propertyID, const String& value, bool important)
{
bool changes = ensureMutableInlineStyle().setProperty(propertyID, value, important, CSSParserContext(document()));
if (changes)
inlineStyleChanged();
return changes;
}
bool StyledElement::removeInlineStyleProperty(CSSPropertyID propertyID)
{
if (!inlineStyle())
return false;
bool changes = ensureMutableInlineStyle().removeProperty(propertyID);
if (changes)
inlineStyleChanged();
return changes;
}
void StyledElement::removeAllInlineStyleProperties()
{
if (!inlineStyle() || inlineStyle()->isEmpty())
return;
ensureMutableInlineStyle().clear();
inlineStyleChanged();
}
void StyledElement::addSubresourceAttributeURLs(ListHashSet<URL>& urls) const
{
auto* inlineStyle = this->inlineStyle();
if (!inlineStyle)
return;
inlineStyle->traverseSubresources([&] (auto& resource) {
urls.add(resource.url());
return false;
});
}
void StyledElement::rebuildPresentationAttributeStyle()
{
RefPtr<StyleProperties> style = MutableStyleProperties::create(isSVGElement() ? SVGAttributeMode : HTMLQuirksMode);
for (const Attribute& attribute : attributesIterator())
collectStyleForPresentationAttribute(attribute.name(), attribute.value(), static_cast<MutableStyleProperties&>(*style));
// ShareableElementData doesn't store presentation attribute style, so make sure we have a UniqueElementData.
UniqueElementData& elementData = ensureUniqueElementData();
elementData.setPresentationAttributeStyleIsDirty(false);
elementData.m_presentationAttributeStyle = style->isEmpty() ? nullptr : WTFMove(style);
}
void StyledElement::addPropertyToPresentationAttributeStyle(MutableStyleProperties& style, CSSPropertyID propertyID, CSSValueID identifier)
{
style.setProperty(propertyID, CSSValuePool::singleton().createIdentifierValue(identifier));
}
void StyledElement::addPropertyToPresentationAttributeStyle(MutableStyleProperties& style, CSSPropertyID propertyID, double value, CSSPrimitiveValue::UnitType unit)
{
style.setProperty(propertyID, CSSValuePool::singleton().createValue(value, unit));
}
void StyledElement::addPropertyToPresentationAttributeStyle(MutableStyleProperties& style, CSSPropertyID propertyID, const String& value)
{
style.setProperty(propertyID, value, false, CSSParserContext(document()));
}
}
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