inline Node* ComposedTreeWalker::traverseParentOrHost(const Node* node) const
{
Node* parent = node->parentNode();
if (!parent)
return 0;
if (!parent->isShadowRoot())
return parent;
ShadowRoot* shadowRoot = toShadowRoot(parent);
ASSERT(!shadowRoot->shadowInsertionPointOfYoungerShadowRoot());
if (!shadowRoot->isYoungest())
return 0;
return shadowRoot->host();
}
Node::InsertionNotificationRequest HTMLContentElement::insertedInto(ContainerNode* insertionPoint)
{
InsertionPoint::insertedInto(insertionPoint);
if (insertionPoint->inDocument() && isActive()) {
ShadowRoot* root = shadowRoot();
root->registerContentElement();
root->owner()->setShouldCollectSelectFeatureSet();
m_registeredWithShadowRoot = true;
}
return InsertionDone;
}
// FIXME: Move the following helper functions, authorShadowRootOf, firstWithinTraversingShadowTree,
// nextTraversingShadowTree to the best place, e.g. NodeTraversal.
static ShadowRoot* authorShadowRootOf(const ContainerNode& node)
{
if (!node.isElementNode() || !isShadowHost(&node))
return nullptr;
ElementShadow* shadow = toElement(node).shadow();
ASSERT(shadow);
for (ShadowRoot* shadowRoot = shadow->oldestShadowRoot(); shadowRoot; shadowRoot = shadowRoot->youngerShadowRoot()) {
if (shadowRoot->type() == ShadowRootType::OpenByDefault || shadowRoot->type() == ShadowRootType::Open)
return shadowRoot;
}
return nullptr;
}
void TreeScope::setNeedsStyleRecalcForViewportUnits() {
for (Element* element = ElementTraversal::firstWithin(rootNode()); element;
element = ElementTraversal::nextIncludingPseudo(*element)) {
for (ShadowRoot* root = element->youngestShadowRoot(); root;
root = root->olderShadowRoot())
root->setNeedsStyleRecalcForViewportUnits();
const ComputedStyle* style = element->computedStyle();
if (style && style->hasViewportUnits())
element->setNeedsStyleRecalc(LocalStyleChange,
StyleChangeReasonForTracing::create(
StyleChangeReason::ViewportUnits));
}
}
void SVGTRefElement::updateReferencedText()
{
String textContent;
if (Element* target = SVGURIReference::targetElementFromIRIString(href(), document()))
textContent = target->textContent();
ASSERT(hasShadowRoot());
ShadowRoot* root = shadowTree()->oldestShadowRoot();
if (!root->firstChild())
root->appendChild(SVGShadowText::create(document(), textContent), ASSERT_NO_EXCEPTION);
else
root->firstChild()->setTextContent(textContent, ASSERT_NO_EXCEPTION);
}
void ShadowRoot::removedFrom(ContainerNode* insertionPoint)
{
if (insertionPoint->inDocument() && m_registeredWithParentShadowRoot) {
ShadowRoot* root = host()->containingShadowRoot();
if (!root)
root = insertionPoint->containingShadowRoot();
if (root)
root->removeChildShadowRoot();
m_registeredWithParentShadowRoot = false;
}
DocumentFragment::removedFrom(insertionPoint);
}
ContainerNode* ComposedTreeTraversal::traverseParentOrHost(const Node& node)
{
ContainerNode* parent = node.parentNode();
if (!parent)
return nullptr;
if (!parent->isShadowRoot())
return parent;
ShadowRoot* shadowRoot = toShadowRoot(parent);
ASSERT(!shadowRoot->shadowInsertionPointOfYoungerShadowRoot());
if (!shadowRoot->isYoungest())
return nullptr;
return shadowRoot->host();
}
void ShadowRoot::removedFrom(ContainerNode* insertionPoint)
{
ShadowRoot* root = host()->containingShadowRoot();
if (!root)
root = insertionPoint->containingShadowRoot();
if (root)
root->removeChildShadowRoot();
if (inActiveDocument())
document().styleEngine()->removeTreeScope(*this);
DocumentFragment::removedFrom(insertionPoint);
}
void ShadowTree::attach()
{
// Children of m_selector is populated lazily in
// ensureSelector(), and here we just ensure that it is in clean state.
ASSERT(!selector().hasPopulated());
selector().willSelect();
for (ShadowRoot* root = youngestShadowRoot(); root; root = root->olderShadowRoot()) {
if (!root->attached())
root->attach();
}
selector().didSelect();
}
Node* ComposedTreeWalker::traverseBackToYoungerShadowRoot(const Node* node, TraversalDirection direction)
{
ASSERT(node);
if (node->parentNode() && node->parentNode()->isShadowRoot()) {
ShadowRoot* parentShadowRoot = toShadowRoot(node->parentNode());
if (!parentShadowRoot->isYoungest()) {
HTMLShadowElement* assignedInsertionPoint = parentShadowRoot->shadowInsertionPointOfYoungerShadowRoot();
ASSERT(assignedInsertionPoint);
return traverseSiblingInCurrentTree(assignedInsertionPoint, direction);
}
}
return 0;
}
Node* ComposedShadowTreeWalker::traverseBackToYoungerShadowRoot(const Node* node, TraversalDirection direction)
{
ASSERT(node);
if (node->parentNode() && node->parentNode()->isShadowRoot()) {
ShadowRoot* parentShadowRoot = toShadowRoot(node->parentNode());
if (!parentShadowRoot->isYoungest()) {
InsertionPoint* assignedInsertionPoint = ScopeContentDistribution::assignedTo(parentShadowRoot);
ASSERT(assignedInsertionPoint);
return traverseSiblingInCurrentTree(assignedInsertionPoint, direction);
}
}
return 0;
}
ShadowRoot* HTMLShadowElement::olderShadowRoot()
{
ShadowRoot* containingRoot = containingShadowRoot();
if (!containingRoot)
return 0;
ContentDistributor::ensureDistribution(containingRoot);
ShadowRoot* older = containingRoot->olderShadowRoot();
if (!older || older->type() != ShadowRoot::AuthorShadowRoot || ScopeContentDistribution::assignedTo(older) != this)
return 0;
return older;
}
static bool shouldBypassMainWorldCSP(Element* element)
{
// Main world CSP is bypassed within an isolated world.
LocalFrame* frame = element->document().frame();
if (frame && frame->script().shouldBypassMainWorldCSP())
return true;
// Main world CSP is bypassed for style elements in user agent shadow DOM.
ShadowRoot* root = element->containingShadowRoot();
if (root && root->type() == ShadowRootType::UserAgent)
return true;
return false;
}
static void attachShadowRoot(ShadowRoot& shadowRoot)
{
if (shadowRoot.attached())
return;
StyleResolver& styleResolver = shadowRoot.document().ensureStyleResolver();
styleResolver.pushParentShadowRoot(&shadowRoot);
attachChildren(shadowRoot);
styleResolver.popParentShadowRoot(&shadowRoot);
shadowRoot.clearNeedsStyleRecalc();
shadowRoot.setAttached(true);
}
TEST(TreeScopeTest, CommonAncestorOfInclusiveTrees) {
// document
// | : Common ancestor is document.
// shadowRoot
Document* document = Document::create();
Element* html = document->createElement("html", StringOrDictionary());
document->appendChild(html);
ShadowRoot* shadowRoot =
html->createShadowRootInternal(ShadowRootType::V0, ASSERT_NO_EXCEPTION);
EXPECT_EQ(document, document->commonAncestorTreeScope(*shadowRoot));
EXPECT_EQ(document, shadowRoot->commonAncestorTreeScope(*document));
}
void ShadowRoot::removedFrom(ContainerNode* insertionPoint)
{
if (insertionPoint->inDocument() && m_registeredWithParentShadowRoot) {
ShadowRoot* root = host()->containingShadowRoot();
if (!root)
root = insertionPoint->containingShadowRoot();
if (root && root->scopeDistribution())
root->scopeDistribution()->unregisterElementShadow();
m_registeredWithParentShadowRoot = false;
}
DocumentFragment::removedFrom(insertionPoint);
}
// Test case for
// - childAt
// - countChildren
// - hasChildren
// - index
// - isDescendantOf
TEST_F(FlatTreeTraversalTest, childAt) {
const char* mainHTML =
"<div id='m0'>"
"<span id='m00'>m00</span>"
"<span id='m01'>m01</span>"
"</div>";
const char* shadowHTML =
"<a id='s00'>s00</a>"
"<content select='#m01'></content>"
"<a id='s02'>s02</a>"
"<a id='s03'><content select='#m00'></content></a>"
"<a id='s04'>s04</a>";
setupSampleHTML(mainHTML, shadowHTML, 0);
Element* body = document().body();
Element* m0 = body->querySelector("#m0");
Element* m00 = m0->querySelector("#m00");
Element* m01 = m0->querySelector("#m01");
Element* shadowHost = m0;
ShadowRoot* shadowRoot = shadowHost->openShadowRoot();
Element* s00 = shadowRoot->querySelector("#s00");
Element* s02 = shadowRoot->querySelector("#s02");
Element* s03 = shadowRoot->querySelector("#s03");
Element* s04 = shadowRoot->querySelector("#s04");
const unsigned numberOfChildNodes = 5;
Node* expectedChildNodes[5] = {s00, m01, s02, s03, s04};
ASSERT_EQ(numberOfChildNodes, FlatTreeTraversal::countChildren(*shadowHost));
EXPECT_TRUE(FlatTreeTraversal::hasChildren(*shadowHost));
for (unsigned index = 0; index < numberOfChildNodes; ++index) {
Node* child = FlatTreeTraversal::childAt(*shadowHost, index);
EXPECT_EQ(expectedChildNodes[index], child)
<< "FlatTreeTraversal::childAt(*shadowHost, " << index << ")";
EXPECT_EQ(index, FlatTreeTraversal::index(*child))
<< "FlatTreeTraversal::index(FlatTreeTraversal(*shadowHost, " << index
<< "))";
EXPECT_TRUE(FlatTreeTraversal::isDescendantOf(*child, *shadowHost))
<< "FlatTreeTraversal::isDescendantOf(*FlatTreeTraversal(*shadowHost, "
<< index << "), *shadowHost)";
}
EXPECT_EQ(nullptr,
FlatTreeTraversal::childAt(*shadowHost, numberOfChildNodes + 1))
<< "Out of bounds childAt() returns nullptr.";
// Distribute node |m00| is child of node in shadow tree |s03|.
EXPECT_EQ(m00, FlatTreeTraversal::childAt(*s03, 0));
}
void ElementShadow::collectSelectFeatureSetFrom(ShadowRoot& root)
{
if (!root.containsShadowRoots() && !root.containsContentElements())
return;
for (Element& element : ElementTraversal::descendantsOf(root)) {
if (ElementShadow* shadow = element.shadow())
m_selectFeatures.add(shadow->ensureSelectFeatureSet());
if (!isHTMLContentElement(element))
continue;
const CSSSelectorList& list = toHTMLContentElement(element).selectorList();
m_selectFeatures.collectFeaturesFromSelectorList(list);
}
}
TEST_F(FlatTreeTraversalTest, previousPostOrder) {
const char* mainHTML =
"<div id='m0'>m0</div>"
"<div id='m1'>"
"<span id='m10'>m10</span>"
"<span id='m11'>m11</span>"
"</div>"
"<div id='m2'>m2</div>";
const char* shadowHTML =
"<content select='#m11'></content>"
"<a id='s11'>s11</a>"
"<a id='s12'>"
"<b id='s120'>s120</b>"
"<content select='#m10'></content>"
"</a>";
setupSampleHTML(mainHTML, shadowHTML, 1);
Element* body = document().body();
Element* m0 = body->querySelector("#m0");
Element* m1 = body->querySelector("#m1");
Element* m2 = body->querySelector("#m2");
Element* m10 = body->querySelector("#m10");
Element* m11 = body->querySelector("#m11");
ShadowRoot* shadowRoot = m1->openShadowRoot();
Element* s11 = shadowRoot->querySelector("#s11");
Element* s12 = shadowRoot->querySelector("#s12");
Element* s120 = shadowRoot->querySelector("#s120");
EXPECT_EQ(*m0->firstChild(), FlatTreeTraversal::previousPostOrder(*m0));
EXPECT_EQ(*s12, FlatTreeTraversal::previousPostOrder(*m1));
EXPECT_EQ(*m10->firstChild(), FlatTreeTraversal::previousPostOrder(*m10));
EXPECT_EQ(*s120, FlatTreeTraversal::previousPostOrder(*m10->firstChild()));
EXPECT_EQ(*s120,
FlatTreeTraversal::previousPostOrder(*m10->firstChild(), s12));
EXPECT_EQ(*m11->firstChild(), FlatTreeTraversal::previousPostOrder(*m11));
EXPECT_EQ(*m0, FlatTreeTraversal::previousPostOrder(*m11->firstChild()));
EXPECT_EQ(nullptr,
FlatTreeTraversal::previousPostOrder(*m11->firstChild(), m11));
EXPECT_EQ(*m2->firstChild(), FlatTreeTraversal::previousPostOrder(*m2));
EXPECT_EQ(*s11->firstChild(), FlatTreeTraversal::previousPostOrder(*s11));
EXPECT_EQ(*m10, FlatTreeTraversal::previousPostOrder(*s12));
EXPECT_EQ(*s120->firstChild(), FlatTreeTraversal::previousPostOrder(*s120));
EXPECT_EQ(*s11, FlatTreeTraversal::previousPostOrder(*s120->firstChild()));
EXPECT_EQ(nullptr,
FlatTreeTraversal::previousPostOrder(*s120->firstChild(), s12));
}
void TreeScopeAdopter::moveTreeToNewScope(Node& root) const
{
ASSERT(needsScopeChange());
#if !ENABLE(OILPAN)
m_oldScope.guardRef();
#endif
// If an element is moved from a document and then eventually back again the collection cache for
// that element may contain stale data as changes made to it will have updated the DOMTreeVersion
// of the document it was moved to. By increasing the DOMTreeVersion of the donating document here
// we ensure that the collection cache will be invalidated as needed when the element is moved back.
Document& oldDocument = m_oldScope.document();
Document& newDocument = m_newScope.document();
bool willMoveToNewDocument = oldDocument != newDocument;
if (willMoveToNewDocument)
oldDocument.incDOMTreeVersion();
for (Node* node = &root; node; node = NodeTraversal::next(*node, &root)) {
updateTreeScope(*node);
if (willMoveToNewDocument)
moveNodeToNewDocument(*node, oldDocument, newDocument);
else if (node->hasRareData()) {
NodeRareData* rareData = node->rareData();
if (rareData->nodeLists())
rareData->nodeLists()->adoptTreeScope();
}
if (!node->isElementNode())
continue;
if (node->hasSyntheticAttrChildNodes()) {
WillBeHeapVector<RefPtrWillBeMember<Attr> >& attrs = *toElement(node)->attrNodeList();
for (unsigned i = 0; i < attrs.size(); ++i)
moveTreeToNewScope(*attrs[i]);
}
for (ShadowRoot* shadow = node->youngestShadowRoot(); shadow; shadow = shadow->olderShadowRoot()) {
shadow->setParentTreeScope(m_newScope);
if (willMoveToNewDocument)
moveTreeToNewDocument(*shadow, oldDocument, newDocument);
}
}
#if !ENABLE(OILPAN)
m_oldScope.guardDeref();
#endif
}
void TreeScopeAdopter::moveTreeToNewScope(Node& root) const
{
ASSERT(needsScopeChange());
#if !ENABLE(OILPAN)
oldScope().guardRef();
#endif
// If an element is moved from a document and then eventually back again the collection cache for
// that element may contain stale data as changes made to it will have updated the DOMTreeVersion
// of the document it was moved to. By increasing the DOMTreeVersion of the donating document here
// we ensure that the collection cache will be invalidated as needed when the element is moved back.
Document& oldDocument = oldScope().document();
Document& newDocument = newScope().document();
bool willMoveToNewDocument = oldDocument != newDocument;
if (willMoveToNewDocument)
oldDocument.incDOMTreeVersion();
for (Node& node : NodeTraversal::inclusiveDescendantsOf(root)) {
updateTreeScope(node);
if (willMoveToNewDocument) {
moveNodeToNewDocument(node, oldDocument, newDocument);
} else if (node.hasRareData()) {
NodeRareData* rareData = node.rareData();
if (rareData->nodeLists())
rareData->nodeLists()->adoptTreeScope();
}
if (!node.isElementNode())
continue;
Element& element = toElement(node);
if (WillBeHeapVector<RefPtrWillBeMember<Attr>>* attrs = element.attrNodeList()) {
for (const auto& attr : *attrs)
moveTreeToNewScope(*attr);
}
for (ShadowRoot* shadow = element.youngestShadowRoot(); shadow; shadow = shadow->olderShadowRoot()) {
shadow->setParentTreeScope(newScope());
if (willMoveToNewDocument)
moveTreeToNewDocument(*shadow, oldDocument, newDocument);
}
}
#if !ENABLE(OILPAN)
oldScope().guardDeref();
#endif
}
void SVGTRefElement::updateReferencedText(Element* target)
{
String textContent;
if (target)
textContent = target->textContent();
ASSERT(shadowRoot());
ShadowRoot* root = shadowRoot();
if (!root->firstChild())
root->appendChild(Text::create(document(), textContent), ASSERT_NO_EXCEPTION);
else {
ASSERT(root->firstChild()->isTextNode());
root->firstChild()->setTextContent(textContent, ASSERT_NO_EXCEPTION);
}
}
void HTMLPlugInImageElement::checkSnapshotStatus()
{
if (!renderer()->isSnapshottedPlugIn()) {
if (displayState() == Playing)
checkSizeChangeForSnapshotting();
return;
}
ShadowRoot* root = userAgentShadowRoot();
if (!root)
return;
Element* shadowContainer = toElement(root->firstChild());
shadowContainer->setAttribute(classAttr, classNameForShadowRoot(this));
}
void HTMLSlotElement::enqueueSlotChangeEvent() {
if (!m_slotchangeEventEnqueued) {
Microtask::enqueueMicrotask(WTF::bind(
&HTMLSlotElement::dispatchSlotChangeEvent, wrapPersistent(this)));
m_slotchangeEventEnqueued = true;
}
ShadowRoot* root = containingShadowRoot();
DCHECK(root);
DCHECK(root->isV1());
root->owner()->setNeedsDistributionRecalc();
// Check slotchange recursively since this slotchange may cause another
// slotchange.
checkSlotChange();
}
void HTMLOptGroupElement::didAddUserAgentShadowRoot(ShadowRoot& root) {
DEFINE_STATIC_LOCAL(AtomicString, labelPadding, ("0 2px 1px 2px"));
DEFINE_STATIC_LOCAL(AtomicString, labelMinHeight, ("1.2em"));
HTMLDivElement* label = HTMLDivElement::create(document());
label->setAttribute(roleAttr, AtomicString("group"));
label->setAttribute(aria_labelAttr, AtomicString());
label->setInlineStyleProperty(CSSPropertyPadding, labelPadding);
label->setInlineStyleProperty(CSSPropertyMinHeight, labelMinHeight);
label->setIdAttribute(ShadowElementNames::optGroupLabel());
root.appendChild(label);
HTMLContentElement* content = HTMLContentElement::create(document());
content->setAttribute(selectAttr, "option,hr");
root.appendChild(content);
}
void HTMLContentElement::removedFrom(ContainerNode* insertionPoint)
{
if (insertionPoint->inDocument() && m_registeredWithShadowRoot) {
ShadowRoot* root = shadowRoot();
if (!root)
root = insertionPoint->shadowRoot();
if (root)
root->unregisterContentElement();
m_registeredWithShadowRoot = false;
if (ElementShadow* elementShadow = root ? root->owner() : 0)
elementShadow->setShouldCollectSelectFeatureSet();
}
InsertionPoint::removedFrom(insertionPoint);
}
void ContentDistributor::ensureDistribution(ShadowRoot* shadowRoot)
{
ASSERT(shadowRoot);
Vector<ShadowRoot*, 8> shadowRoots;
for (Element* current = shadowRoot->hostElement(); current; current = current->shadowHost()) {
ShadowRoot* currentRoot = current->shadowRoot();
if (!currentRoot->distributor().needsDistribution())
break;
shadowRoots.append(currentRoot);
}
for (size_t i = shadowRoots.size(); i > 0; --i)
shadowRoots[i - 1]->distributor().distribute(shadowRoots[i - 1]->hostElement());
}
nsresult
HTMLContentElement::SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
nsIAtom* aPrefix, const nsAString& aValue,
bool aNotify)
{
nsresult rv = nsGenericHTMLElement::SetAttr(aNameSpaceID, aName, aPrefix,
aValue, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::select) {
// Select attribute was updated, the insertion point may match different
// elements.
nsIDocument* doc = OwnerDoc();
nsCSSParser parser(doc->CSSLoader());
mValidSelector = true;
mSelectorList = nullptr;
nsresult rv = parser.ParseSelectorString(aValue,
doc->GetDocumentURI(),
// Bug 11240
0, // XXX get the line number!
getter_Transfers(mSelectorList));
// We don't want to return an exception if parsing failed because
// the spec does not define it as an exception case.
if (NS_SUCCEEDED(rv)) {
// Ensure that all the selectors are valid
nsCSSSelectorList* selectors = mSelectorList;
while (selectors) {
if (!IsValidContentSelectors(selectors->mSelectors)) {
// If we have an invalid selector, we can not match anything.
mValidSelector = false;
mSelectorList = nullptr;
break;
}
selectors = selectors->mNext;
}
}
ShadowRoot* containingShadow = GetContainingShadow();
if (containingShadow) {
containingShadow->DistributeAllNodes();
}
}
return NS_OK;
}
void HTMLMarqueeElement::didAddUserAgentShadowRoot(ShadowRoot& shadowRoot) {
Element* style = HTMLStyleElement::create(document(), false);
style->setTextContent(
":host { display: inline-block; overflow: hidden;"
"text-align: initial; white-space: nowrap; }"
":host([direction=\"up\"]), :host([direction=\"down\"]) { overflow: "
"initial; overflow-y: hidden; white-space: initial; }"
":host > div { will-change: transform; }");
shadowRoot.appendChild(style);
Element* mover = HTMLDivElement::create(document());
shadowRoot.appendChild(mover);
mover->appendChild(HTMLContentElement::create(document()));
m_mover = mover;
}
void InputType::destroyShadowSubtree()
{
ShadowRoot* root = element()->userAgentShadowRoot();
if (!root)
return;
root->removeAllChildren();
// It's ok to clear contents of all other ShadowRoots because they must have
// been created by TextFieldDecorationElement, and we don't allow adding
// AuthorShadowRoot to HTMLInputElement.
while ((root = root->youngerShadowRoot())) {
root->removeAllChildren();
root->appendChild(HTMLShadowElement::create(shadowTag, element()->document()));
}
}
