SelectorChecker.cpp [plain text]
#include "config.h"
#include "SelectorChecker.h"
#include "CSSSelector.h"
#include "CSSSelectorList.h"
#include "Document.h"
#include "ElementTraversal.h"
#include "FocusController.h"
#include "Frame.h"
#include "FrameSelection.h"
#include "HTMLAnchorElement.h"
#include "HTMLDocument.h"
#include "HTMLFrameElementBase.h"
#include "HTMLInputElement.h"
#include "HTMLNames.h"
#include "HTMLOptGroupElement.h"
#include "HTMLOptionElement.h"
#include "HTMLProgressElement.h"
#include "HTMLStyleElement.h"
#include "InsertionPoint.h"
#include "InspectorInstrumentation.h"
#include "NodeRenderStyle.h"
#include "Page.h"
#include "RenderElement.h"
#include "RenderScrollbar.h"
#include "RenderStyle.h"
#include "ScrollableArea.h"
#include "ScrollbarTheme.h"
#include "SelectorCheckerTestFunctions.h"
#include "ShadowRoot.h"
#include "StyledElement.h"
#include "Text.h"
namespace WebCore {
using namespace HTMLNames;
static inline bool isFirstChildElement(const Element* element)
{
return !ElementTraversal::previousSibling(element);
}
static inline bool isLastChildElement(const Element* element)
{
return !ElementTraversal::nextSibling(element);
}
static inline bool isFirstOfType(const Element* element, const QualifiedName& type)
{
for (const Element* sibling = ElementTraversal::previousSibling(element); sibling; sibling = ElementTraversal::previousSibling(sibling)) {
if (sibling->hasTagName(type))
return false;
}
return true;
}
static inline bool isLastOfType(const Element* element, const QualifiedName& type)
{
for (const Element* sibling = ElementTraversal::nextSibling(element); sibling; sibling = ElementTraversal::nextSibling(sibling)) {
if (sibling->hasTagName(type))
return false;
}
return true;
}
static inline int countElementsBefore(const Element* element)
{
int count = 0;
for (const Element* sibling = ElementTraversal::previousSibling(element); sibling; sibling = ElementTraversal::previousSibling(sibling)) {
unsigned index = sibling->childIndex();
if (index) {
count += index;
break;
}
count++;
}
return count;
}
static inline int countElementsOfTypeBefore(const Element* element, const QualifiedName& type)
{
int count = 0;
for (const Element* sibling = ElementTraversal::previousSibling(element); sibling; sibling = ElementTraversal::previousSibling(sibling)) {
if (sibling->hasTagName(type))
++count;
}
return count;
}
static inline int countElementsAfter(const Element* element)
{
int count = 0;
for (const Element* sibling = ElementTraversal::nextSibling(element); sibling; sibling = ElementTraversal::nextSibling(sibling))
++count;
return count;
}
static inline int countElementsOfTypeAfter(const Element* element, const QualifiedName& type)
{
int count = 0;
for (const Element* sibling = ElementTraversal::nextSibling(element); sibling; sibling = ElementTraversal::nextSibling(sibling)) {
if (sibling->hasTagName(type))
++count;
}
return count;
}
SelectorChecker::SelectorChecker(Document& document, Mode mode)
: m_strictParsing(!document.inQuirksMode())
, m_documentIsHTML(document.isHTMLDocument())
, m_mode(mode)
{
}
bool SelectorChecker::match(const SelectorCheckingContext& context) const
{
PseudoId pseudoId = NOPSEUDO;
if (matchRecursively(context, pseudoId) != SelectorMatches)
return false;
if (context.pseudoId != NOPSEUDO && context.pseudoId != pseudoId)
return false;
if (context.pseudoId == NOPSEUDO && pseudoId != NOPSEUDO) {
if (m_mode == Mode::ResolvingStyle && pseudoId < FIRST_INTERNAL_PSEUDOID)
context.elementStyle->setHasPseudoStyle(pseudoId);
return m_mode == Mode::SharingRules || m_mode == Mode::StyleInvalidation;
}
return true;
}
SelectorChecker::Match SelectorChecker::matchRecursively(const SelectorCheckingContext& context, PseudoId& dynamicPseudo) const
{
if (!checkOne(context))
return SelectorFailsLocally;
if (context.selector->m_match == CSSSelector::PseudoElement) {
if (context.selector->isCustomPseudoElement()) {
if (ShadowRoot* root = context.element->containingShadowRoot()) {
if (context.element->shadowPseudoId() != context.selector->value())
return SelectorFailsLocally;
if (context.selector->pseudoElementType() == CSSSelector::PseudoElementWebKitCustom && root->type() != ShadowRoot::UserAgentShadowRoot)
return SelectorFailsLocally;
} else if (m_mode != Mode::StyleInvalidation)
return SelectorFailsLocally;
} else {
if ((!context.elementStyle && m_mode == Mode::ResolvingStyle) || m_mode == Mode::QueryingRules)
return SelectorFailsLocally;
PseudoId pseudoId = m_mode == Mode::StyleInvalidation ? NOPSEUDO : CSSSelector::pseudoId(context.selector->pseudoElementType());
if (pseudoId != NOPSEUDO)
dynamicPseudo = pseudoId;
}
}
CSSSelector::Relation relation = context.selector->relation();
const CSSSelector* historySelector = context.selector->tagHistory();
if (!historySelector)
return SelectorMatches;
SelectorCheckingContext nextContext(context);
nextContext.selector = historySelector;
PseudoId ignoreDynamicPseudo = NOPSEUDO;
if (relation != CSSSelector::SubSelector) {
if (context.pseudoId != NOPSEUDO && context.pseudoId != dynamicPseudo)
return SelectorFailsCompletely;
if (context.element->isLink() || (relation != CSSSelector::Descendant && relation != CSSSelector::Child))
nextContext.visitedMatchType = VisitedMatchDisabled;
nextContext.pseudoId = NOPSEUDO;
}
switch (relation) {
case CSSSelector::Descendant:
nextContext.element = context.element->parentElement();
nextContext.firstSelectorOfTheFragment = nextContext.selector;
nextContext.elementStyle = 0;
for (; nextContext.element; nextContext.element = nextContext.element->parentElement()) {
Match match = this->matchRecursively(nextContext, ignoreDynamicPseudo);
if (match == SelectorMatches || match == SelectorFailsCompletely)
return match;
}
return SelectorFailsCompletely;
case CSSSelector::Child:
{
nextContext.element = context.element->parentElement();
if (!nextContext.element)
return SelectorFailsCompletely;
nextContext.firstSelectorOfTheFragment = nextContext.selector;
nextContext.elementStyle = nullptr;
Match match = matchRecursively(nextContext, ignoreDynamicPseudo);
if (match == SelectorMatches || match == SelectorFailsCompletely)
return match;
return SelectorFailsAllSiblings;
}
case CSSSelector::DirectAdjacent:
if (m_mode == Mode::ResolvingStyle) {
if (Element* parentElement = context.element->parentElement())
parentElement->setChildrenAffectedByDirectAdjacentRules();
}
nextContext.element = context.element->previousElementSibling();
if (!nextContext.element)
return SelectorFailsAllSiblings;
nextContext.firstSelectorOfTheFragment = nextContext.selector;
nextContext.elementStyle = 0;
return matchRecursively(nextContext, ignoreDynamicPseudo);
case CSSSelector::IndirectAdjacent:
if (m_mode == Mode::ResolvingStyle) {
if (Element* parentElement = context.element->parentElement())
parentElement->setChildrenAffectedByForwardPositionalRules();
}
nextContext.element = context.element->previousElementSibling();
nextContext.firstSelectorOfTheFragment = nextContext.selector;
nextContext.elementStyle = 0;
for (; nextContext.element; nextContext.element = nextContext.element->previousElementSibling()) {
Match match = this->matchRecursively(nextContext, ignoreDynamicPseudo);
if (match == SelectorMatches || match == SelectorFailsAllSiblings || match == SelectorFailsCompletely)
return match;
};
return SelectorFailsAllSiblings;
case CSSSelector::SubSelector:
nextContext.hasScrollbarPseudo = dynamicPseudo != NOPSEUDO && (context.scrollbar || dynamicPseudo == SCROLLBAR_CORNER || dynamicPseudo == RESIZER);
nextContext.hasSelectionPseudo = dynamicPseudo == SELECTION;
if ((context.elementStyle || m_mode == Mode::CollectingRules) && dynamicPseudo != NOPSEUDO
&& !nextContext.hasSelectionPseudo
&& !(nextContext.hasScrollbarPseudo && nextContext.selector->m_match == CSSSelector::PseudoClass))
return SelectorFailsCompletely;
return matchRecursively(nextContext, dynamicPseudo);
case CSSSelector::ShadowDescendant:
{
Element* shadowHostNode = context.element->shadowHost();
if (!shadowHostNode)
return SelectorFailsCompletely;
nextContext.element = shadowHostNode;
nextContext.firstSelectorOfTheFragment = nextContext.selector;
nextContext.elementStyle = 0;
return matchRecursively(nextContext, ignoreDynamicPseudo);
}
}
ASSERT_NOT_REACHED();
return SelectorFailsCompletely;
}
static bool attributeValueMatches(const Attribute& attribute, CSSSelector::Match match, const AtomicString& selectorValue, bool caseSensitive)
{
const AtomicString& value = attribute.value();
ASSERT(!value.isNull());
switch (match) {
case CSSSelector::Set:
break;
case CSSSelector::Exact:
if (caseSensitive ? selectorValue != value : !equalIgnoringCase(selectorValue, value))
return false;
break;
case CSSSelector::List:
{
if (selectorValue.contains(' ') || selectorValue.isEmpty())
return false;
unsigned startSearchAt = 0;
while (true) {
size_t foundPos = value.find(selectorValue, startSearchAt, caseSensitive);
if (foundPos == notFound)
return false;
if (!foundPos || value[foundPos - 1] == ' ') {
unsigned endStr = foundPos + selectorValue.length();
if (endStr == value.length() || value[endStr] == ' ')
break; }
startSearchAt = foundPos + 1;
}
break;
}
case CSSSelector::Contain:
if (!value.contains(selectorValue, caseSensitive) || selectorValue.isEmpty())
return false;
break;
case CSSSelector::Begin:
if (!value.startsWith(selectorValue, caseSensitive) || selectorValue.isEmpty())
return false;
break;
case CSSSelector::End:
if (!value.endsWith(selectorValue, caseSensitive) || selectorValue.isEmpty())
return false;
break;
case CSSSelector::Hyphen:
if (value.length() < selectorValue.length())
return false;
if (!value.startsWith(selectorValue, caseSensitive))
return false;
if (value.length() != selectorValue.length() && value[selectorValue.length()] != '-')
return false;
break;
default:
ASSERT_NOT_REACHED();
return false;
}
return true;
}
static bool anyAttributeMatches(Element* element, const CSSSelector* selector, const QualifiedName& selectorAttr, bool caseSensitive)
{
ASSERT(element->hasAttributesWithoutUpdate());
for (const Attribute& attribute : element->attributesIterator()) {
if (!attribute.matches(selectorAttr.prefix(), element->isHTMLElement() ? selector->attributeCanonicalLocalName() : selectorAttr.localName(), selectorAttr.namespaceURI()))
continue;
if (attributeValueMatches(attribute, static_cast<CSSSelector::Match>(selector->m_match), selector->value(), caseSensitive))
return true;
}
return false;
}
static bool canMatchHoverOrActiveInQuirksMode(const SelectorChecker::SelectorCheckingContext& context)
{
if (context.inFunctionalPseudoClass)
return true;
for (const CSSSelector* selector = context.firstSelectorOfTheFragment; selector; selector = selector->tagHistory()) {
switch (selector->m_match) {
case CSSSelector::Tag:
if (selector->tagQName() != anyQName())
return true;
break;
case CSSSelector::PseudoClass: {
CSSSelector::PseudoClassType pseudoClassType = selector->pseudoClassType();
if (pseudoClassType != CSSSelector::PseudoClassHover && pseudoClassType != CSSSelector::PseudoClassActive)
return true;
break;
}
case CSSSelector::Id:
case CSSSelector::Class:
case CSSSelector::Exact:
case CSSSelector::Set:
case CSSSelector::List:
case CSSSelector::Hyphen:
case CSSSelector::Contain:
case CSSSelector::Begin:
case CSSSelector::End:
case CSSSelector::PagePseudoClass:
case CSSSelector::PseudoElement:
return true;
case CSSSelector::Unknown:
ASSERT_NOT_REACHED();
break;
}
CSSSelector::Relation relation = selector->relation();
if (relation == CSSSelector::ShadowDescendant)
return true;
if (relation != CSSSelector::SubSelector)
return false;
}
return false;
}
bool SelectorChecker::checkOne(const SelectorCheckingContext& context) const
{
Element* const & element = context.element;
const CSSSelector* const & selector = context.selector;
ASSERT(element);
ASSERT(selector);
if (selector->m_match == CSSSelector::Tag)
return SelectorChecker::tagMatches(element, selector->tagQName());
if (selector->m_match == CSSSelector::Class)
return element->hasClass() && element->classNames().contains(selector->value());
if (selector->m_match == CSSSelector::Id)
return element->hasID() && element->idForStyleResolution() == selector->value();
if (selector->isAttributeSelector()) {
if (!element->hasAttributes())
return false;
const QualifiedName& attr = selector->attribute();
bool caseSensitive = !(m_documentIsHTML && element->isHTMLElement()) || HTMLDocument::isCaseSensitiveAttribute(attr);
if (!anyAttributeMatches(element, selector, attr, caseSensitive))
return false;
}
if (selector->m_match == CSSSelector::PseudoClass) {
if (selector->pseudoClassType() == CSSSelector::PseudoClassNot) {
const CSSSelectorList* selectorList = selector->selectorList();
if (!selectorList)
return false;
SelectorCheckingContext subContext(context);
subContext.inFunctionalPseudoClass = true;
subContext.firstSelectorOfTheFragment = selectorList->first();
for (subContext.selector = selectorList->first(); subContext.selector; subContext.selector = subContext.selector->tagHistory()) {
if (subContext.selector->m_match == CSSSelector::PseudoClass) {
ASSERT(subContext.selector->pseudoClassType() != CSSSelector::PseudoClassNot);
if (subContext.selector->pseudoClassType() == CSSSelector::PseudoClassVisited || (subContext.selector->pseudoClassType() == CSSSelector::PseudoClassLink && subContext.visitedMatchType == VisitedMatchEnabled))
return true;
}
if (!checkOne(subContext))
return true;
}
} else if (context.hasScrollbarPseudo) {
return checkScrollbarPseudoClass(context, &element->document(), selector);
} else if (context.hasSelectionPseudo) {
if (selector->pseudoClassType() == CSSSelector::PseudoClassWindowInactive)
return !element->document().page()->focusController().isActive();
}
switch (selector->pseudoClassType()) {
case CSSSelector::PseudoClassNot:
break; case CSSSelector::PseudoClassEmpty:
{
bool result = true;
for (Node* n = element->firstChild(); n; n = n->nextSibling()) {
if (n->isElementNode()) {
result = false;
break;
}
if (n->isTextNode()) {
Text* textNode = toText(n);
if (!textNode->data().isEmpty()) {
result = false;
break;
}
}
}
if (m_mode == Mode::ResolvingStyle) {
element->setStyleAffectedByEmpty();
if (context.elementStyle)
context.elementStyle->setEmptyState(result);
else if (element->renderStyle() && (element->document().styleSheetCollection().usesSiblingRules() || element->renderStyle()->unique()))
element->renderStyle()->setEmptyState(result);
}
return result;
}
case CSSSelector::PseudoClassFirstChild:
if (Element* parentElement = element->parentElement()) {
bool result = isFirstChildElement(element);
if (m_mode == Mode::ResolvingStyle) {
RenderStyle* childStyle = context.elementStyle ? context.elementStyle : element->renderStyle();
parentElement->setChildrenAffectedByFirstChildRules();
if (result && childStyle)
childStyle->setFirstChildState();
}
return result;
}
break;
case CSSSelector::PseudoClassFirstOfType:
if (Element* parentElement = element->parentElement()) {
bool result = isFirstOfType(element, element->tagQName());
if (m_mode == Mode::ResolvingStyle)
parentElement->setChildrenAffectedByForwardPositionalRules();
return result;
}
break;
case CSSSelector::PseudoClassLastChild:
if (Element* parentElement = element->parentElement()) {
bool result = parentElement->isFinishedParsingChildren() && isLastChildElement(element);
if (m_mode == Mode::ResolvingStyle) {
RenderStyle* childStyle = context.elementStyle ? context.elementStyle : element->renderStyle();
parentElement->setChildrenAffectedByLastChildRules();
if (result && childStyle)
childStyle->setLastChildState();
}
return result;
}
break;
case CSSSelector::PseudoClassLastOfType:
if (Element* parentElement = element->parentElement()) {
if (m_mode == Mode::ResolvingStyle)
parentElement->setChildrenAffectedByBackwardPositionalRules();
if (!parentElement->isFinishedParsingChildren())
return false;
return isLastOfType(element, element->tagQName());
}
break;
case CSSSelector::PseudoClassOnlyChild:
if (Element* parentElement = element->parentElement()) {
bool firstChild = isFirstChildElement(element);
bool onlyChild = firstChild && parentElement->isFinishedParsingChildren() && isLastChildElement(element);
if (m_mode == Mode::ResolvingStyle) {
RenderStyle* childStyle = context.elementStyle ? context.elementStyle : element->renderStyle();
parentElement->setChildrenAffectedByFirstChildRules();
parentElement->setChildrenAffectedByLastChildRules();
if (firstChild && childStyle)
childStyle->setFirstChildState();
if (onlyChild && childStyle)
childStyle->setLastChildState();
}
return onlyChild;
}
break;
case CSSSelector::PseudoClassOnlyOfType:
if (Element* parentElement = element->parentElement()) {
if (m_mode == Mode::ResolvingStyle) {
parentElement->setChildrenAffectedByForwardPositionalRules();
parentElement->setChildrenAffectedByBackwardPositionalRules();
}
if (!parentElement->isFinishedParsingChildren())
return false;
return isFirstOfType(element, element->tagQName()) && isLastOfType(element, element->tagQName());
}
break;
case CSSSelector::PseudoClassNthChild:
if (!selector->parseNth())
break;
if (Element* parentElement = element->parentElement()) {
int count = 1 + countElementsBefore(element);
if (m_mode == Mode::ResolvingStyle) {
RenderStyle* childStyle = context.elementStyle ? context.elementStyle : element->renderStyle();
element->setChildIndex(count);
if (childStyle)
childStyle->setUnique();
parentElement->setChildrenAffectedByForwardPositionalRules();
}
if (selector->matchNth(count))
return true;
}
break;
case CSSSelector::PseudoClassNthOfType:
if (!selector->parseNth())
break;
if (Element* parentElement = element->parentElement()) {
int count = 1 + countElementsOfTypeBefore(element, element->tagQName());
if (m_mode == Mode::ResolvingStyle)
parentElement->setChildrenAffectedByForwardPositionalRules();
if (selector->matchNth(count))
return true;
}
break;
case CSSSelector::PseudoClassNthLastChild:
if (!selector->parseNth())
break;
if (Element* parentElement = element->parentElement()) {
if (m_mode == Mode::ResolvingStyle)
parentElement->setChildrenAffectedByBackwardPositionalRules();
if (!parentElement->isFinishedParsingChildren())
return false;
int count = 1 + countElementsAfter(element);
if (selector->matchNth(count))
return true;
}
break;
case CSSSelector::PseudoClassNthLastOfType:
if (!selector->parseNth())
break;
if (Element* parentElement = element->parentElement()) {
if (m_mode == Mode::ResolvingStyle)
parentElement->setChildrenAffectedByBackwardPositionalRules();
if (!parentElement->isFinishedParsingChildren())
return false;
int count = 1 + countElementsOfTypeAfter(element, element->tagQName());
if (selector->matchNth(count))
return true;
}
break;
case CSSSelector::PseudoClassTarget:
if (element == element->document().cssTarget())
return true;
break;
case CSSSelector::PseudoClassAny:
{
SelectorCheckingContext subContext(context);
subContext.inFunctionalPseudoClass = true;
PseudoId ignoreDynamicPseudo = NOPSEUDO;
for (subContext.selector = selector->selectorList()->first(); subContext.selector; subContext.selector = CSSSelectorList::next(subContext.selector)) {
subContext.firstSelectorOfTheFragment = subContext.selector;
if (matchRecursively(subContext, ignoreDynamicPseudo) == SelectorMatches)
return true;
}
}
break;
case CSSSelector::PseudoClassAutofill:
return isAutofilled(element);
case CSSSelector::PseudoClassAnyLink:
case CSSSelector::PseudoClassLink:
return element->isLink();
case CSSSelector::PseudoClassVisited:
return element->isLink() && context.visitedMatchType == VisitedMatchEnabled;
case CSSSelector::PseudoClassDrag:
if (m_mode == Mode::ResolvingStyle) {
if (context.elementStyle)
context.elementStyle->setAffectedByDrag();
else
element->setChildrenAffectedByDrag();
}
if (element->renderer() && element->renderer()->isDragging())
return true;
break;
case CSSSelector::PseudoClassFocus:
return matchesFocusPseudoClass(element);
case CSSSelector::PseudoClassHover:
if (m_strictParsing || element->isLink() || canMatchHoverOrActiveInQuirksMode(context)) {
if (m_mode == Mode::ResolvingStyle) {
if (context.elementStyle)
context.elementStyle->setAffectedByHover();
else
element->setChildrenAffectedByHover();
}
if (element->hovered() || InspectorInstrumentation::forcePseudoState(element, CSSSelector::PseudoClassHover))
return true;
}
break;
case CSSSelector::PseudoClassActive:
if (m_strictParsing || element->isLink() || canMatchHoverOrActiveInQuirksMode(context)) {
if (m_mode == Mode::ResolvingStyle) {
if (context.elementStyle)
context.elementStyle->setAffectedByActive();
else
element->setChildrenAffectedByActive();
}
if (element->active() || InspectorInstrumentation::forcePseudoState(element, CSSSelector::PseudoClassActive))
return true;
}
break;
case CSSSelector::PseudoClassEnabled:
return isEnabled(element);
case CSSSelector::PseudoClassFullPageMedia:
return element->document().isMediaDocument();
case CSSSelector::PseudoClassDefault:
return isDefaultButtonForForm(element);
case CSSSelector::PseudoClassDisabled:
return isDisabled(element);
case CSSSelector::PseudoClassReadOnly:
return matchesReadOnlyPseudoClass(element);
case CSSSelector::PseudoClassReadWrite:
return matchesReadWritePseudoClass(element);
case CSSSelector::PseudoClassOptional:
return isOptionalFormControl(element);
case CSSSelector::PseudoClassRequired:
return isRequiredFormControl(element);
case CSSSelector::PseudoClassValid:
return isValid(element);
case CSSSelector::PseudoClassInvalid:
return isInvalid(element);
case CSSSelector::PseudoClassChecked:
return isChecked(element);
case CSSSelector::PseudoClassIndeterminate:
return shouldAppearIndeterminate(element);
case CSSSelector::PseudoClassRoot:
if (element == element->document().documentElement())
return true;
break;
case CSSSelector::PseudoClassLang:
{
const AtomicString& argument = selector->argument();
if (argument.isNull())
return false;
return matchesLangPseudoClass(element, argument.impl());
}
#if ENABLE(FULLSCREEN_API)
case CSSSelector::PseudoClassFullScreen:
return matchesFullScreenPseudoClass(element);
case CSSSelector::PseudoClassAnimatingFullScreenTransition:
if (element != element->document().webkitCurrentFullScreenElement())
return false;
return element->document().isAnimatingFullScreen();
case CSSSelector::PseudoClassFullScreenAncestor:
return element->containsFullScreenElement();
case CSSSelector::PseudoClassFullScreenDocument:
if (!element->document().webkitIsFullScreen())
return false;
return true;
#endif
case CSSSelector::PseudoClassInRange:
return isInRange(element);
case CSSSelector::PseudoClassOutOfRange:
return isOutOfRange(element);
#if ENABLE(VIDEO_TRACK)
case CSSSelector::PseudoClassFuture:
return matchesFutureCuePseudoClass(element);
case CSSSelector::PseudoClassPast:
return matchesPastCuePseudoClass(element);
#endif
case CSSSelector::PseudoClassScope:
{
const Node* contextualReferenceNode = !context.scope ? element->document().documentElement() : context.scope;
if (element == contextualReferenceNode)
return true;
break;
}
case CSSSelector::PseudoClassHorizontal:
case CSSSelector::PseudoClassVertical:
case CSSSelector::PseudoClassDecrement:
case CSSSelector::PseudoClassIncrement:
case CSSSelector::PseudoClassStart:
case CSSSelector::PseudoClassEnd:
case CSSSelector::PseudoClassDoubleButton:
case CSSSelector::PseudoClassSingleButton:
case CSSSelector::PseudoClassNoButton:
case CSSSelector::PseudoClassCornerPresent:
return false;
case CSSSelector::PseudoClassUnknown:
default:
ASSERT_NOT_REACHED();
break;
}
return false;
}
#if ENABLE(VIDEO_TRACK)
else if (selector->m_match == CSSSelector::PseudoElement && selector->pseudoElementType() == CSSSelector::PseudoElementCue) {
SelectorCheckingContext subContext(context);
PseudoId ignoreDynamicPseudo = NOPSEUDO;
const CSSSelector* const & selector = context.selector;
for (subContext.selector = selector->selectorList()->first(); subContext.selector; subContext.selector = CSSSelectorList::next(subContext.selector)) {
subContext.firstSelectorOfTheFragment = subContext.selector;
subContext.inFunctionalPseudoClass = true;
if (matchRecursively(subContext, ignoreDynamicPseudo) == SelectorMatches)
return true;
}
return false;
}
#endif
return true;
}
bool SelectorChecker::checkScrollbarPseudoClass(const SelectorCheckingContext& context, Document* document, const CSSSelector* selector) const
{
ASSERT(selector->m_match == CSSSelector::PseudoClass);
RenderScrollbar* scrollbar = context.scrollbar;
ScrollbarPart part = context.scrollbarPart;
if (selector->pseudoClassType() == CSSSelector::PseudoClassWindowInactive)
return !document->page()->focusController().isActive();
if (!scrollbar)
return false;
switch (selector->pseudoClassType()) {
case CSSSelector::PseudoClassEnabled:
return scrollbar->enabled();
case CSSSelector::PseudoClassDisabled:
return !scrollbar->enabled();
case CSSSelector::PseudoClassHover:
{
ScrollbarPart hoveredPart = scrollbar->hoveredPart();
if (part == ScrollbarBGPart)
return hoveredPart != NoPart;
if (part == TrackBGPart)
return hoveredPart == BackTrackPart || hoveredPart == ForwardTrackPart || hoveredPart == ThumbPart;
return part == hoveredPart;
}
case CSSSelector::PseudoClassActive:
{
ScrollbarPart pressedPart = scrollbar->pressedPart();
if (part == ScrollbarBGPart)
return pressedPart != NoPart;
if (part == TrackBGPart)
return pressedPart == BackTrackPart || pressedPart == ForwardTrackPart || pressedPart == ThumbPart;
return part == pressedPart;
}
case CSSSelector::PseudoClassHorizontal:
return scrollbar->orientation() == HorizontalScrollbar;
case CSSSelector::PseudoClassVertical:
return scrollbar->orientation() == VerticalScrollbar;
case CSSSelector::PseudoClassDecrement:
return part == BackButtonStartPart || part == BackButtonEndPart || part == BackTrackPart;
case CSSSelector::PseudoClassIncrement:
return part == ForwardButtonStartPart || part == ForwardButtonEndPart || part == ForwardTrackPart;
case CSSSelector::PseudoClassStart:
return part == BackButtonStartPart || part == ForwardButtonStartPart || part == BackTrackPart;
case CSSSelector::PseudoClassEnd:
return part == BackButtonEndPart || part == ForwardButtonEndPart || part == ForwardTrackPart;
case CSSSelector::PseudoClassDoubleButton:
{
ScrollbarButtonsPlacement buttonsPlacement = scrollbar->theme()->buttonsPlacement();
if (part == BackButtonStartPart || part == ForwardButtonStartPart || part == BackTrackPart)
return buttonsPlacement == ScrollbarButtonsDoubleStart || buttonsPlacement == ScrollbarButtonsDoubleBoth;
if (part == BackButtonEndPart || part == ForwardButtonEndPart || part == ForwardTrackPart)
return buttonsPlacement == ScrollbarButtonsDoubleEnd || buttonsPlacement == ScrollbarButtonsDoubleBoth;
return false;
}
case CSSSelector::PseudoClassSingleButton:
{
ScrollbarButtonsPlacement buttonsPlacement = scrollbar->theme()->buttonsPlacement();
if (part == BackButtonStartPart || part == ForwardButtonEndPart || part == BackTrackPart || part == ForwardTrackPart)
return buttonsPlacement == ScrollbarButtonsSingle;
return false;
}
case CSSSelector::PseudoClassNoButton:
{
ScrollbarButtonsPlacement buttonsPlacement = scrollbar->theme()->buttonsPlacement();
if (part == BackTrackPart)
return buttonsPlacement == ScrollbarButtonsNone || buttonsPlacement == ScrollbarButtonsDoubleEnd;
if (part == ForwardTrackPart)
return buttonsPlacement == ScrollbarButtonsNone || buttonsPlacement == ScrollbarButtonsDoubleStart;
return false;
}
case CSSSelector::PseudoClassCornerPresent:
return scrollbar->scrollableArea()->isScrollCornerVisible();
default:
return false;
}
}
unsigned SelectorChecker::determineLinkMatchType(const CSSSelector* selector)
{
unsigned linkMatchType = MatchAll;
for (; selector; selector = selector->tagHistory()) {
if (selector->m_match == CSSSelector::PseudoClass) {
switch (selector->pseudoClassType()) {
case CSSSelector::PseudoClassNot:
{
const CSSSelectorList* selectorList = selector->selectorList();
if (!selectorList)
break;
for (const CSSSelector* subSelector = selectorList->first(); subSelector; subSelector = subSelector->tagHistory()) {
if (subSelector->m_match == CSSSelector::PseudoClass) {
CSSSelector::PseudoClassType subType = subSelector->pseudoClassType();
if (subType == CSSSelector::PseudoClassVisited)
linkMatchType &= ~SelectorChecker::MatchVisited;
else if (subType == CSSSelector::PseudoClassLink)
linkMatchType &= ~SelectorChecker::MatchLink;
}
}
}
break;
case CSSSelector::PseudoClassLink:
linkMatchType &= ~SelectorChecker::MatchVisited;
break;
case CSSSelector::PseudoClassVisited:
linkMatchType &= ~SelectorChecker::MatchLink;
break;
default:
break;
}
}
CSSSelector::Relation relation = selector->relation();
if (relation == CSSSelector::SubSelector)
continue;
if (relation != CSSSelector::Descendant && relation != CSSSelector::Child)
return linkMatchType;
if (linkMatchType != MatchAll)
return linkMatchType;
}
return linkMatchType;
}
static bool isFrameFocused(const Element* element)
{
return element->document().frame() && element->document().frame()->selection().isFocusedAndActive();
}
bool SelectorChecker::matchesFocusPseudoClass(const Element* element)
{
if (InspectorInstrumentation::forcePseudoState(const_cast<Element*>(element), CSSSelector::PseudoClassFocus))
return true;
return element->focused() && isFrameFocused(element);
}
}