blob: ed1ff23faa88f4815e1b5ed1b1ea60094668f1c2 [file] [log] [blame]
/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
* Copyright (C) 2011 Research In Motion Limited. 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 "PropertySetCSSStyleDeclaration.h"
#include "CSSPropertyParser.h"
#include "CSSRule.h"
#include "CSSStyleSheet.h"
#include "CustomElementReactionQueue.h"
#include "HTMLNames.h"
#include "InspectorInstrumentation.h"
#include "MutationObserverInterestGroup.h"
#include "MutationRecord.h"
#include "StyleProperties.h"
#include "StyleSheetContents.h"
#include "StyledElement.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(PropertySetCSSStyleDeclaration);
WTF_MAKE_ISO_ALLOCATED_IMPL(StyleRuleCSSStyleDeclaration);
WTF_MAKE_ISO_ALLOCATED_IMPL(InlineCSSStyleDeclaration);
class StyleAttributeMutationScope {
WTF_MAKE_NONCOPYABLE(StyleAttributeMutationScope);
public:
StyleAttributeMutationScope(PropertySetCSSStyleDeclaration* decl)
{
++s_scopeCount;
if (s_scopeCount != 1) {
ASSERT(s_currentDecl == decl);
return;
}
ASSERT(!s_currentDecl);
s_currentDecl = decl;
auto* element = s_currentDecl->parentElement();
if (!element)
return;
bool shouldReadOldValue = false;
m_mutationRecipients = MutationObserverInterestGroup::createForAttributesMutation(*s_currentDecl->parentElement(), HTMLNames::styleAttr);
if (m_mutationRecipients && m_mutationRecipients->isOldValueRequested())
shouldReadOldValue = true;
if (UNLIKELY(element->isDefinedCustomElement())) {
auto* reactionQueue = element->reactionQueue();
if (reactionQueue && reactionQueue->observesStyleAttribute()) {
m_customElement = element;
shouldReadOldValue = true;
}
}
if (shouldReadOldValue)
m_oldValue = s_currentDecl->parentElement()->getAttribute(HTMLNames::styleAttr);
}
~StyleAttributeMutationScope()
{
--s_scopeCount;
if (s_scopeCount)
return;
if (s_shouldDeliver) {
if (m_mutationRecipients) {
auto mutation = MutationRecord::createAttributes(*s_currentDecl->parentElement(), HTMLNames::styleAttr, m_oldValue);
m_mutationRecipients->enqueueMutationRecord(WTFMove(mutation));
}
if (m_customElement) {
auto& newValue = m_customElement->getAttribute(HTMLNames::styleAttr);
CustomElementReactionQueue::enqueueAttributeChangedCallbackIfNeeded(*m_customElement, HTMLNames::styleAttr, m_oldValue, newValue);
}
}
s_shouldDeliver = false;
if (!s_shouldNotifyInspector) {
s_currentDecl = nullptr;
return;
}
// We have to clear internal state before calling Inspector's code.
PropertySetCSSStyleDeclaration* localCopyStyleDecl = s_currentDecl;
s_currentDecl = nullptr;
s_shouldNotifyInspector = false;
if (auto* parentElement = localCopyStyleDecl->parentElement())
InspectorInstrumentation::didInvalidateStyleAttr(*parentElement);
}
void enqueueMutationRecord()
{
s_shouldDeliver = true;
}
void didInvalidateStyleAttr()
{
s_shouldNotifyInspector = true;
}
private:
static unsigned s_scopeCount;
static PropertySetCSSStyleDeclaration* s_currentDecl;
static bool s_shouldNotifyInspector;
static bool s_shouldDeliver;
std::unique_ptr<MutationObserverInterestGroup> m_mutationRecipients;
AtomicString m_oldValue;
RefPtr<Element> m_customElement;
};
unsigned StyleAttributeMutationScope::s_scopeCount = 0;
PropertySetCSSStyleDeclaration* StyleAttributeMutationScope::s_currentDecl = nullptr;
bool StyleAttributeMutationScope::s_shouldNotifyInspector = false;
bool StyleAttributeMutationScope::s_shouldDeliver = false;
void PropertySetCSSStyleDeclaration::ref()
{
m_propertySet->ref();
}
void PropertySetCSSStyleDeclaration::deref()
{
m_propertySet->deref();
}
unsigned PropertySetCSSStyleDeclaration::length() const
{
return m_propertySet->propertyCount();
}
String PropertySetCSSStyleDeclaration::item(unsigned i) const
{
if (i >= m_propertySet->propertyCount())
return String();
return m_propertySet->propertyAt(i).cssName();
}
String PropertySetCSSStyleDeclaration::cssText() const
{
return m_propertySet->asText();
}
ExceptionOr<void> PropertySetCSSStyleDeclaration::setCssText(const String& text)
{
StyleAttributeMutationScope mutationScope(this);
if (!willMutate())
return { };
bool changed = m_propertySet->parseDeclaration(text, cssParserContext());
didMutate(changed ? PropertyChanged : NoChanges);
mutationScope.enqueueMutationRecord();
return { };
}
RefPtr<DeprecatedCSSOMValue> PropertySetCSSStyleDeclaration::getPropertyCSSValue(const String& propertyName)
{
if (isCustomPropertyName(propertyName)) {
RefPtr<CSSValue> value = m_propertySet->getCustomPropertyCSSValue(propertyName);
if (!value)
return nullptr;
return wrapForDeprecatedCSSOM(value.get());
}
CSSPropertyID propertyID = cssPropertyID(propertyName);
if (!propertyID)
return nullptr;
return wrapForDeprecatedCSSOM(getPropertyCSSValueInternal(propertyID).get());
}
String PropertySetCSSStyleDeclaration::getPropertyValue(const String& propertyName)
{
if (isCustomPropertyName(propertyName))
return m_propertySet->getCustomPropertyValue(propertyName);
CSSPropertyID propertyID = cssPropertyID(propertyName);
if (!propertyID)
return String();
return getPropertyValueInternal(propertyID);
}
String PropertySetCSSStyleDeclaration::getPropertyPriority(const String& propertyName)
{
if (isCustomPropertyName(propertyName))
return m_propertySet->customPropertyIsImportant(propertyName) ? "important"_s : emptyString();
CSSPropertyID propertyID = cssPropertyID(propertyName);
if (!propertyID)
return String();
return m_propertySet->propertyIsImportant(propertyID) ? "important"_s : emptyString();
}
String PropertySetCSSStyleDeclaration::getPropertyShorthand(const String& propertyName)
{
CSSPropertyID propertyID = cssPropertyID(propertyName);
if (!propertyID)
return String();
return m_propertySet->getPropertyShorthand(propertyID);
}
bool PropertySetCSSStyleDeclaration::isPropertyImplicit(const String& propertyName)
{
CSSPropertyID propertyID = cssPropertyID(propertyName);
if (!propertyID)
return false;
return m_propertySet->isPropertyImplicit(propertyID);
}
ExceptionOr<void> PropertySetCSSStyleDeclaration::setProperty(const String& propertyName, const String& value, const String& priority)
{
StyleAttributeMutationScope mutationScope(this);
CSSPropertyID propertyID = cssPropertyID(propertyName);
if (isCustomPropertyName(propertyName))
propertyID = CSSPropertyCustom;
if (!propertyID)
return { };
if (!willMutate())
return { };
bool important = equalIgnoringASCIICase(priority, "important");
if (!important && !priority.isEmpty())
return { };
bool changed;
if (UNLIKELY(propertyID == CSSPropertyCustom)) {
Document* document = nullptr;
if (parentElement())
document = &parentElement()->document();
else
document = parentStyleSheet()->ownerDocument();
changed = m_propertySet->setCustomProperty(document, propertyName, value, important, cssParserContext());
} else
changed = m_propertySet->setProperty(propertyID, value, important, cssParserContext());
didMutate(changed ? PropertyChanged : NoChanges);
if (changed) {
// CSS DOM requires raising SyntaxError of parsing failed, but this is too dangerous for compatibility,
// see <http://bugs.webkit.org/show_bug.cgi?id=7296>.
mutationScope.enqueueMutationRecord();
}
return { };
}
ExceptionOr<String> PropertySetCSSStyleDeclaration::removeProperty(const String& propertyName)
{
StyleAttributeMutationScope mutationScope(this);
CSSPropertyID propertyID = cssPropertyID(propertyName);
if (isCustomPropertyName(propertyName))
propertyID = CSSPropertyCustom;
if (!propertyID)
return String();
if (!willMutate())
return String();
String result;
bool changed = propertyID != CSSPropertyCustom ? m_propertySet->removeProperty(propertyID, &result) : m_propertySet->removeCustomProperty(propertyName, &result);
didMutate(changed ? PropertyChanged : NoChanges);
if (changed)
mutationScope.enqueueMutationRecord();
return result;
}
RefPtr<CSSValue> PropertySetCSSStyleDeclaration::getPropertyCSSValueInternal(CSSPropertyID propertyID)
{
return m_propertySet->getPropertyCSSValue(propertyID);
}
String PropertySetCSSStyleDeclaration::getPropertyValueInternal(CSSPropertyID propertyID)
{
String value = m_propertySet->getPropertyValue(propertyID);
if (!value.isEmpty())
return value;
return String();
}
ExceptionOr<bool> PropertySetCSSStyleDeclaration::setPropertyInternal(CSSPropertyID propertyID, const String& value, bool important)
{
StyleAttributeMutationScope mutationScope(this);
if (!willMutate())
return false;
bool changed = m_propertySet->setProperty(propertyID, value, important, cssParserContext());
didMutate(changed ? PropertyChanged : NoChanges);
if (changed)
mutationScope.enqueueMutationRecord();
return changed;
}
RefPtr<DeprecatedCSSOMValue> PropertySetCSSStyleDeclaration::wrapForDeprecatedCSSOM(CSSValue* internalValue)
{
if (!internalValue)
return nullptr;
// The map is here to maintain the object identity of the CSSValues over multiple invocations.
// FIXME: It is likely that the identity is not important for web compatibility and this code should be removed.
if (!m_cssomValueWrappers)
m_cssomValueWrappers = std::make_unique<HashMap<CSSValue*, WeakPtr<DeprecatedCSSOMValue>>>();
auto& clonedValue = m_cssomValueWrappers->add(internalValue, WeakPtr<DeprecatedCSSOMValue>()).iterator->value;
if (clonedValue)
return clonedValue.get();
RefPtr<DeprecatedCSSOMValue> wrapper = internalValue->createDeprecatedCSSOMWrapper(*this);
clonedValue = makeWeakPtr(wrapper.get());
return wrapper;
}
StyleSheetContents* PropertySetCSSStyleDeclaration::contextStyleSheet() const
{
CSSStyleSheet* cssStyleSheet = parentStyleSheet();
return cssStyleSheet ? &cssStyleSheet->contents() : nullptr;
}
CSSParserContext PropertySetCSSStyleDeclaration::cssParserContext() const
{
return CSSParserContext(m_propertySet->cssParserMode());
}
Ref<MutableStyleProperties> PropertySetCSSStyleDeclaration::copyProperties() const
{
return m_propertySet->mutableCopy();
}
StyleRuleCSSStyleDeclaration::StyleRuleCSSStyleDeclaration(MutableStyleProperties& propertySet, CSSRule& parentRule)
: PropertySetCSSStyleDeclaration(propertySet)
, m_refCount(1)
, m_parentRule(&parentRule)
{
m_propertySet->ref();
}
StyleRuleCSSStyleDeclaration::~StyleRuleCSSStyleDeclaration()
{
m_propertySet->deref();
}
void StyleRuleCSSStyleDeclaration::ref()
{
++m_refCount;
}
void StyleRuleCSSStyleDeclaration::deref()
{
ASSERT(m_refCount);
if (!--m_refCount)
delete this;
}
bool StyleRuleCSSStyleDeclaration::willMutate()
{
if (!m_parentRule || !m_parentRule->parentStyleSheet())
return false;
m_parentRule->parentStyleSheet()->willMutateRules();
return true;
}
void StyleRuleCSSStyleDeclaration::didMutate(MutationType type)
{
ASSERT(m_parentRule);
ASSERT(m_parentRule->parentStyleSheet());
if (type == PropertyChanged)
m_cssomValueWrappers = nullptr;
// Style sheet mutation needs to be signaled even if the change failed. willMutate*/didMutate* must pair.
m_parentRule->parentStyleSheet()->didMutateRuleFromCSSStyleDeclaration();
}
CSSStyleSheet* StyleRuleCSSStyleDeclaration::parentStyleSheet() const
{
return m_parentRule ? m_parentRule->parentStyleSheet() : nullptr;
}
CSSParserContext StyleRuleCSSStyleDeclaration::cssParserContext() const
{
auto* styleSheet = contextStyleSheet();
if (!styleSheet)
return PropertySetCSSStyleDeclaration::cssParserContext();
return styleSheet->parserContext();
}
void StyleRuleCSSStyleDeclaration::reattach(MutableStyleProperties& propertySet)
{
m_propertySet->deref();
m_propertySet = &propertySet;
m_propertySet->ref();
}
bool InlineCSSStyleDeclaration::willMutate()
{
if (m_parentElement)
InspectorInstrumentation::willInvalidateStyleAttr(*m_parentElement);
return true;
}
void InlineCSSStyleDeclaration::didMutate(MutationType type)
{
if (type == NoChanges)
return;
m_cssomValueWrappers = nullptr;
if (!m_parentElement)
return;
m_parentElement->invalidateStyleAttribute();
StyleAttributeMutationScope(this).didInvalidateStyleAttr();
}
CSSStyleSheet* InlineCSSStyleDeclaration::parentStyleSheet() const
{
return nullptr;
}
CSSParserContext InlineCSSStyleDeclaration::cssParserContext() const
{
if (!m_parentElement)
return PropertySetCSSStyleDeclaration::cssParserContext();
CSSParserContext context(m_parentElement->document());
context.mode = m_propertySet->cssParserMode();
return context;
}
} // namespace WebCore