void ScopedStyleResolver::addTreeBoundaryCrossingRules(const RuleSet& authorRules, CSSStyleSheet* parentStyleSheet, unsigned sheetIndex)
{
bool isDocumentScope = treeScope().rootNode().isDocumentNode();
if (authorRules.deepCombinatorOrShadowPseudoRules().isEmpty()
&& (isDocumentScope || (authorRules.contentPseudoElementRules().isEmpty() && authorRules.slottedPseudoElementRules().isEmpty())))
return;
if (!authorRules.deepCombinatorOrShadowPseudoRules().isEmpty())
m_hasDeepOrShadowSelector = true;
OwnPtrWillBeRawPtr<RuleSet> ruleSetForScope = RuleSet::create();
addRules(ruleSetForScope.get(), authorRules.deepCombinatorOrShadowPseudoRules());
if (!isDocumentScope) {
addRules(ruleSetForScope.get(), authorRules.contentPseudoElementRules());
addRules(ruleSetForScope.get(), authorRules.slottedPseudoElementRules());
}
if (!m_treeBoundaryCrossingRuleSet) {
m_treeBoundaryCrossingRuleSet = adoptPtrWillBeNoop(new CSSStyleSheetRuleSubSet());
treeScope().document().styleResolver()->addTreeBoundaryCrossingScope(treeScope().rootNode());
}
m_treeBoundaryCrossingRuleSet->append(RuleSubSet::create(parentStyleSheet, sheetIndex, ruleSetForScope.release()));
}
void HTMLMapElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
// FIXME: This logic seems wrong for XML documents.
// Either the id or name will be used depending on the order the attributes are parsed.
if (isIdAttributeName(name) || name == nameAttr) {
if (isIdAttributeName(name)) {
// Call base class so that hasID bit gets set.
HTMLElement::parseAttribute(name, value);
if (document().isHTMLDocument())
return;
}
if (inDocument())
treeScope().removeImageMap(this);
String mapName = value;
if (mapName[0] == '#')
mapName = mapName.substring(1);
m_name = AtomicString(document().isHTMLDocument() ? mapName.lower() : mapName);
if (inDocument())
treeScope().addImageMap(this);
return;
}
HTMLElement::parseAttribute(name, value);
}
void ScopedStyleResolver::appendCSSStyleSheet(CSSStyleSheet& cssSheet, const MediaQueryEvaluator& medium)
{
unsigned index = m_authorStyleSheets.size();
m_authorStyleSheets.append(&cssSheet);
StyleSheetContents* sheet = cssSheet.contents();
AddRuleFlags addRuleFlags = treeScope().document().securityOrigin()->canRequest(sheet->baseURL()) ? RuleHasDocumentSecurityOrigin : RuleHasNoSpecialState;
const RuleSet& ruleSet = sheet->ensureRuleSet(medium, addRuleFlags);
addKeyframeRules(ruleSet);
addFontFaceRules(ruleSet);
addTreeBoundaryCrossingRules(ruleSet, &cssSheet, index);
treeScope().document().styleResolver()->addMediaQueryResults(ruleSet.viewportDependentMediaQueryResults());
}
// getElementById on SVGSVGElement is restricted to only the child subtree defined by the <svg> element.
// See http://www.w3.org/TR/SVG11/struct.html#InterfaceSVGSVGElement
Element* SVGSVGElement::getElementById(const String& id)
{
Element* element = treeScope().getElementById(id);
if (element && element->isDescendantOf(this))
return element;
if (treeScope().containsMultipleElementsWithId(id)) {
for (auto element : *treeScope().getAllElementsById(id)) {
if (element->isDescendantOf(this))
return element;
}
}
return nullptr;
}
void ContainerNode::parserAppendChild(PassRefPtr<Node> newChild)
{
ASSERT(newChild);
ASSERT(!newChild->parentNode()); // Use appendChild if you need to handle reparenting (and want DOM mutation events).
ASSERT(!newChild->isDocumentFragment());
#if ENABLE(TEMPLATE_ELEMENT)
ASSERT(!hasTagName(HTMLNames::templateTag));
#endif
if (&document() != &newChild->document())
document().adoptNode(newChild.get(), ASSERT_NO_EXCEPTION);
{
NoEventDispatchAssertion assertNoEventDispatch;
// FIXME: This method should take a PassRefPtr.
appendChildToContainer(newChild.get(), *this);
treeScope().adoptIfNeeded(newChild.get());
}
newChild->updateAncestorConnectedSubframeCountForInsertion();
ChildListMutationScope(*this).childAdded(*newChild);
notifyChildInserted(*newChild, ChildChangeSourceParser);
ChildNodeInsertionNotifier(*this).notify(*newChild);
newChild->setNeedsStyleRecalc(ReconstructRenderTree);
}
void DocumentStyleSheetCollection::updateActiveStyleSheets(StyleEngine* engine, StyleResolverUpdateMode updateMode)
{
StyleSheetCollection collection;
ActiveDocumentStyleSheetCollector collector(collection);
collectStyleSheets(engine, collector);
StyleSheetChange change;
analyzeStyleSheetChange(updateMode, collection, change);
if (change.styleResolverUpdateType == Reconstruct) {
engine->clearMasterResolver();
// FIMXE: The following depends on whether StyleRuleFontFace was modified or not.
// No need to always-clear font cache.
engine->clearFontCache();
} else if (StyleResolver* styleResolver = engine->resolver()) {
if (change.styleResolverUpdateType != Additive) {
ASSERT(change.styleResolverUpdateType == Reset);
styleResolver->resetAuthorStyle(treeScope());
engine->removeFontFaceRules(change.fontFaceRulesToRemove);
styleResolver->removePendingAuthorStyleSheets(m_activeAuthorStyleSheets);
styleResolver->lazyAppendAuthorStyleSheets(0, collection.activeAuthorStyleSheets());
} else {
styleResolver->lazyAppendAuthorStyleSheets(m_activeAuthorStyleSheets.size(), collection.activeAuthorStyleSheets());
}
}
if (change.requiresFullStyleRecalc)
document().setNeedsStyleRecalc(SubtreeStyleChange);
collection.swap(*this);
updateUsesRemUnits();
}
void ContainerNode::takeAllChildrenFrom(ContainerNode* oldParent)
{
NodeVector children;
getChildNodes(oldParent, children);
if (oldParent->document()->hasMutationObserversOfType(MutationObserver::ChildList)) {
ChildListMutationScope mutation(oldParent);
for (unsigned i = 0; i < children.size(); ++i)
mutation.willRemoveChild(children[i].get());
}
// FIXME: We need to do notifyMutationObserversNodeWillDetach() for each child,
// probably inside removeDetachedChildrenInContainer.
oldParent->removeDetachedChildren();
for (unsigned i = 0; i < children.size(); ++i) {
if (children[i]->attached())
children[i]->detach();
// FIXME: We need a no mutation event version of adoptNode.
RefPtr<Node> child = document()->adoptNode(children[i].release(), ASSERT_NO_EXCEPTION);
parserAppendChild(child.get());
// FIXME: Together with adoptNode above, the tree scope might get updated recursively twice
// (if the document changed or oldParent was in a shadow tree, AND *this is in a shadow tree).
// Can we do better?
treeScope()->adoptIfNeeded(child.get());
if (attached() && !child->attached())
child->attach();
}
}
void SVGUseElement::buildPendingResource()
{
if (inUseShadowTree())
return;
clearShadowTree();
cancelShadowTreeRecreation();
if (!referencedScope() || !inDocument())
return;
AtomicString id;
Element* target = SVGURIReference::targetElementFromIRIString(hrefString(), treeScope(), &id, externalDocument());
if (!target || !target->inDocument()) {
// If we can't find the target of an external element, just give up.
// We can't observe if the target somewhen enters the external document, nor should we do it.
if (externalDocument())
return;
if (id.isEmpty())
return;
referencedScope()->document().accessSVGExtensions().addPendingResource(id, this);
ASSERT(hasPendingResources());
return;
}
if (target->isSVGElement()) {
buildShadowAndInstanceTree(toSVGElement(target));
invalidateDependentShadowTrees();
}
ASSERT(!m_needsShadowTreeRecreation);
}
void ScopedStyleResolver::collectMatchingTreeBoundaryCrossingRules(ElementRuleCollector& collector, CascadeOrder cascadeOrder)
{
for (const auto& rules : *m_treeBoundaryCrossingRuleSet) {
MatchRequest request(rules->m_ruleSet.get(), &treeScope().rootNode(), rules->m_parentStyleSheet, rules->m_parentIndex);
collector.collectMatchingRules(request, cascadeOrder, true);
}
}
String SVGElement::title() const
{
// According to spec, we should not return titles when hovering over root <svg> elements (those
// <title> elements are the title of the document, not a tooltip) so we instantly return.
if (isOutermostSVGSVGElement())
return String();
// Walk up the tree, to find out whether we're inside a <use> shadow tree, to find the right title.
if (isInShadowTree()) {
Element* shadowHostElement = toShadowRoot(treeScope().rootNode()).host();
// At this time, SVG nodes are not allowed in non-<use> shadow trees, so any shadow root we do
// have should be a use. The assert and following test is here to catch future shadow DOM changes
// that do enable SVG in a shadow tree.
ASSERT(!shadowHostElement || isSVGUseElement(*shadowHostElement));
if (isSVGUseElement(shadowHostElement)) {
SVGUseElement& useElement = toSVGUseElement(*shadowHostElement);
// If the <use> title is not empty we found the title to use.
String useTitle(useElement.title());
if (!useTitle.isEmpty())
return useTitle;
}
}
// If we aren't an instance in a <use> or the <use> title was not found, then find the first
// <title> child of this element.
// If a title child was found, return the text contents.
if (Element* titleElement = Traversal<SVGTitleElement>::firstChild(*this))
return titleElement->innerText();
// Otherwise return a null/empty string.
return String();
}
void ScopedStyleResolver::addFontFaceRules(const RuleSet& ruleSet)
{
// FIXME(BUG 72461): We don't add @font-face rules of scoped style sheets for the moment.
if (!treeScope().rootNode().isDocumentNode())
return;
Document& document = treeScope().document();
CSSFontSelector* cssFontSelector = document.styleEngine().fontSelector();
const WillBeHeapVector<RawPtrWillBeMember<StyleRuleFontFace>> fontFaceRules = ruleSet.fontFaceRules();
for (auto& fontFaceRule : fontFaceRules) {
if (RefPtrWillBeRawPtr<FontFace> fontFace = FontFace::create(&document, fontFaceRule))
cssFontSelector->fontFaceCache()->add(cssFontSelector, fontFaceRule, fontFace);
}
if (fontFaceRules.size())
document.styleResolver()->invalidateMatchedPropertiesCache();
}
void ContainerNode::parserAppendChild(PassRefPtr<Node> newChild)
{
ASSERT(newChild);
ASSERT(!newChild->parentNode()); // Use appendChild if you need to handle reparenting (and want DOM mutation events).
ASSERT(!newChild->isDocumentFragment());
ASSERT(!hasTagName(HTMLNames::templateTag));
if (document() != newChild->document())
document()->adoptNode(newChild.get(), ASSERT_NO_EXCEPTION);
Node* last = m_lastChild;
{
NoEventDispatchAssertion assertNoEventDispatch;
// FIXME: This method should take a PassRefPtr.
appendChildToContainer(newChild.get(), this);
treeScope()->adoptIfNeeded(newChild.get());
}
newChild->updateAncestorConnectedSubframeCountForInsertion();
ChildListMutationScope(this).childAdded(newChild.get());
childrenChanged(true, last, 0, 1);
ChildNodeInsertionNotifier(this).notify(newChild.get());
}
void HTMLElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
if (isIdAttributeName(name) || name == classAttr || name == styleAttr)
return Element::parseAttribute(name, value);
if (name == dirAttr)
dirAttributeChanged(value);
else if (name == tabindexAttr) {
int tabindex = 0;
if (value.isEmpty()) {
clearTabIndexExplicitlyIfNeeded();
if (treeScope().adjustedFocusedElement() == this) {
// We might want to call blur(), but it's dangerous to dispatch
// events here.
document().setNeedsFocusedElementCheck();
}
} else if (parseHTMLInteger(value, tabindex)) {
// Clamp tabindex to the range of 'short' to match Firefox's behavior.
setTabIndexExplicitly(max(static_cast<int>(std::numeric_limits<short>::min()), min(tabindex, static_cast<int>(std::numeric_limits<short>::max()))));
}
} else {
const AtomicString& eventName = eventNameForAttributeName(name);
if (!eventName.isNull())
setAttributeEventListener(eventName, createAttributeEventListener(this, name, value));
}
}
inline SVGElement* SVGSMILElement::eventBaseFor(const Condition& condition)
{
Element* eventBase = condition.baseID().isEmpty() ? targetElement() : treeScope().getElementById(AtomicString(condition.baseID()));
if (eventBase && eventBase->isSVGElement())
return toSVGElement(eventBase);
return nullptr;
}
void ScopedStyleResolver::collectMatchingTreeBoundaryCrossingRules(ElementRuleCollector& collector, bool includeEmptyRules, CascadeOrder cascadeOrder)
{
RuleRange ruleRange = collector.matchedResult().ranges.authorRuleRange();
for (const auto& rules : *m_treeBoundaryCrossingRuleSet) {
MatchRequest request(rules->m_ruleSet.get(), includeEmptyRules, &treeScope().rootNode(), rules->m_parentStyleSheet, rules->m_parentIndex);
collector.collectMatchingRules(request, ruleRange, cascadeOrder, true);
}
}
bool Element::affectedByAttributeSelector(const AtomicString& attributeName) const
{
if (attributeName.isEmpty())
return false;
if (treeScope().scopedStyleResolver().hasSelectorForAttribute(attributeName))
return true;
return false;
}
bool Element::affectedByIdSelector(const AtomicString& idValue) const
{
if (idValue.isEmpty())
return false;
if (treeScope().scopedStyleResolver().hasSelectorForId(idValue))
return true;
return false;
}
bool HTMLShadowElement::doesSelectFromHostChildren() const
{
TreeScope* scope = treeScope();
if (scope->isShadowRoot())
return toShadowRoot(scope)->isOldest();
return false;
}
ScopedStyleResolver* ScopedStyleResolver::parent() const
{
for (TreeScope* scope = treeScope().parentTreeScope(); scope; scope = scope->parentTreeScope()) {
if (ScopedStyleResolver* resolver = scope->scopedStyleResolver())
return resolver;
}
return nullptr;
}
void SVGTRefElement::updateReferencedText()
{
Element* target = treeScope()->getElementById(SVGURIReference::getTarget(href()));
String textContent;
if (target && target->isSVGElement())
textContent = static_cast<SVGElement*>(target)->textContent();
ExceptionCode ignore = 0;
setTextContent(textContent, ignore);
}
bool ContainerNode::appendChild(PassRefPtr<Node> newChild, ExceptionCode& ec, AttachBehavior attachBehavior)
{
RefPtr<ContainerNode> protect(this);
// Check that this node is not "floating".
// If it is, it can be deleted as a side effect of sending mutation events.
ASSERT(refCount() || parentOrShadowHostNode());
ec = 0;
// Make sure adding the new child is ok
if (!checkAddChild(this, newChild.get(), ec))
return false;
if (newChild == m_lastChild) // nothing to do
return newChild;
NodeVector targets;
collectChildrenAndRemoveFromOldParent(newChild.get(), targets, ec);
if (ec)
return false;
if (targets.isEmpty())
return true;
// We need this extra check because collectChildrenAndRemoveFromOldParent() can fire mutation events.
if (!checkAcceptChildGuaranteedNodeTypes(this, newChild.get(), ec))
return false;
InspectorInstrumentation::willInsertDOMNode(document(), this);
// Now actually add the child(ren)
ChildListMutationScope mutation(this);
for (NodeVector::const_iterator it = targets.begin(); it != targets.end(); ++it) {
Node* child = it->get();
// If the child has a parent again, just stop what we're doing, because
// that means someone is doing something with DOM mutation -- can't re-parent
// a child that already has a parent.
if (child->parentNode())
break;
treeScope()->adoptIfNeeded(child);
// Append child to the end of the list
{
NoEventDispatchAssertion assertNoEventDispatch;
appendChildToContainer(child, this);
}
updateTreeAfterInsertion(this, child, attachBehavior);
}
dispatchSubtreeModifiedEvent();
return true;
}
void ScopedStyleResolver::addTreeBoundaryCrossingRules(const RuleSet& authorRules, CSSStyleSheet* parentStyleSheet, unsigned sheetIndex)
{
bool isDocumentScope = treeScope().rootNode().isDocumentNode();
if (authorRules.treeBoundaryCrossingRules().isEmpty() && (isDocumentScope || authorRules.shadowDistributedRules().isEmpty()))
return;
OwnPtrWillBeRawPtr<RuleSet> ruleSetForScope = RuleSet::create();
addRules(ruleSetForScope.get(), authorRules.treeBoundaryCrossingRules());
if (!isDocumentScope)
addRules(ruleSetForScope.get(), authorRules.shadowDistributedRules());
if (!m_treeBoundaryCrossingRuleSet) {
m_treeBoundaryCrossingRuleSet = adoptPtrWillBeNoop(new CSSStyleSheetRuleSubSet());
treeScope().document().styleResolver()->addTreeBoundaryCrossingScope(treeScope().rootNode());
}
m_treeBoundaryCrossingRuleSet->append(RuleSubSet::create(parentStyleSheet, sheetIndex, ruleSetForScope.release()));
}
void Element::removedFrom(ContainerNode* insertionPoint)
{
if (insertionPoint->isInTreeScope() && treeScope() == document()) {
const AtomicString& idValue = getIdAttribute();
if (!idValue.isNull())
updateId(insertionPoint->treeScope(), idValue, nullAtom);
}
ContainerNode::removedFrom(insertionPoint);
}
inline void Element::updateId(const AtomicString& oldId, const AtomicString& newId)
{
if (!isInTreeScope())
return;
if (oldId == newId)
return;
updateId(treeScope(), oldId, newId);
}
PassRefPtrWillBeRawPtr<FilterEffect> SVGFEImageElement::build(SVGFilterBuilder*, Filter* filter)
{
if (m_cachedImage) {
// Don't use the broken image icon on image loading errors.
RefPtr<Image> image = m_cachedImage->errorOccurred() ?
nullptr : m_cachedImage->image();
return FEImage::createWithImage(filter, image, m_preserveAspectRatio->currentValue());
}
return FEImage::createWithIRIReference(filter, treeScope(), hrefString(), m_preserveAspectRatio->currentValue());
}
ShadowRoot* InsertionPoint::assignedFrom() const
{
TreeScope* scope = treeScope();
if (!scope->isShadowRoot())
return 0;
ShadowRoot* olderShadowRoot = toShadowRoot(scope)->olderShadowRoot();
if (olderShadowRoot && olderShadowRoot->assignedTo() == this)
return olderShadowRoot;
return 0;
}
HTMLMenuElement* HTMLElement::contextMenu() const
{
const AtomicString& contextMenuId(fastGetAttribute(contextmenuAttr));
if (contextMenuId.isNull())
return nullptr;
Element* element = treeScope().getElementById(contextMenuId);
// Not checking if the menu element is of type "popup".
// Ignoring menu element type attribute is intentional according to the standard.
return isHTMLMenuElement(element) ? toHTMLMenuElement(element) : nullptr;
}
ShadowRoot* InsertionPoint::assignedFrom() const
{
Node* treeScopeRoot = treeScope()->rootNode();
if (!treeScopeRoot->isShadowRoot())
return 0;
ShadowRoot* olderShadowRoot = toShadowRoot(treeScopeRoot)->olderShadowRoot();
if (olderShadowRoot && olderShadowRoot->assignedTo() == this)
return olderShadowRoot;
return 0;
}
// getElementById on SVGSVGElement is restricted to only the child subtree defined by the <svg> element.
// See http://www.w3.org/TR/SVG11/struct.html#InterfaceSVGSVGElement
Element* SVGSVGElement::getElementById(const AtomicString& id)
{
Element* element = treeScope().getElementById(id);
if (element && element->isDescendantOf(this))
return element;
// Fall back to traversing our subtree. Duplicate ids are allowed, the first found will
// be returned.
for (auto& element : descendantsOfType<Element>(*this)) {
if (element.getIdAttribute() == id)
return &element;
}
return 0;
}
Element* DocumentFragment::getElementById(const AtomicString& id) const
{
// Fast path for ShadowRoot, where we are both a DocumentFragment and a TreeScope.
if (isTreeScope())
return treeScope().getElementById(id);
// Otherwise, fall back to iterating all of the element descendants.
for (auto& element : elementDescendants(*this)) {
if (element.getIdAttribute() == id)
return const_cast<Element*>(&element);
}
return nullptr;
}
