void ShadowTree::removeAllShadowRoots()
{
if (!hasShadowRoot())
return;
// Dont protect this ref count.
Element* shadowHost = host();
while (RefPtr<ShadowRoot> oldRoot = m_shadowRoots.removeHead()) {
InspectorInstrumentation::willPopShadowRoot(shadowHost, oldRoot.get());
shadowHost->document()->removeFocusedNodeOfSubtree(oldRoot.get());
if (oldRoot->attached())
oldRoot->detach();
oldRoot->setShadowHost(0);
oldRoot->setPrev(0);
oldRoot->setNext(0);
shadowHost->document()->adoptIfNeeded(oldRoot.get());
ChildNodeRemovalNotifier(shadowHost).notify(oldRoot.get());
}
if (shadowHost->attached())
shadowHost->attachChildrenLazily();
}
bool ContainerNode::removeChild(Node* oldChild, ExceptionCode& ec)
{
// 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());
RefPtr<Node> protect(this);
ec = 0;
// NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
if (isReadOnlyNode()) {
ec = NO_MODIFICATION_ALLOWED_ERR;
return false;
}
// NOT_FOUND_ERR: Raised if oldChild is not a child of this node.
if (!oldChild || oldChild->parentNode() != this) {
ec = NOT_FOUND_ERR;
return false;
}
RefPtr<Node> child = oldChild;
document().removeFocusedNodeOfSubtree(child.get());
#if ENABLE(FULLSCREEN_API)
document().removeFullScreenElementOfSubtree(child.get());
#endif
// Events fired when blurring currently focused node might have moved this
// child into a different parent.
if (child->parentNode() != this) {
ec = NOT_FOUND_ERR;
return false;
}
willRemoveChild(child.get());
// Mutation events might have moved this child into a different parent.
if (child->parentNode() != this) {
ec = NOT_FOUND_ERR;
return false;
}
{
WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates;
Node* prev = child->previousSibling();
Node* next = child->nextSibling();
removeBetween(prev, next, child.get());
childrenChanged(false, prev, next, -1);
ChildNodeRemovalNotifier(this).notify(child.get());
}
dispatchSubtreeModifiedEvent();
return child;
}
void ContainerNode::parserRemoveChild(Node* oldChild)
{
ASSERT(oldChild);
ASSERT(oldChild->parentNode() == this);
Node* prev = oldChild->previousSibling();
Node* next = oldChild->nextSibling();
removeBetween(prev, next, oldChild);
childrenChanged(true, prev, next, -1);
ChildNodeRemovalNotifier(this).notify(oldChild);
}
// this differs from other remove functions because it forcibly removes all the children,
// regardless of read-only status or event exceptions, e.g.
void ContainerNode::removeChildren()
{
if (!m_firstChild)
return;
// The container node can be removed from event handlers.
RefPtr<ContainerNode> protect(this);
// Exclude this node when looking for the focused or full screen Node since
// only children will be removed.
// FIXME: We should call these inside the loop below. Right now you can focus
// a node with mutation events and it'll never get blured.
document()->removeFocusedNodeOfSubtree(this, true);
document()->removeFullScreenElementOfSubtree(this, true);
ChildListMutationScope mutation(this);
NodeVector removedChildren;
{
WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates;
while (RefPtr<Node> child = m_firstChild) {
// Dispatch synchronous events like mutation and unload events.
dispatchChildRemovalEvents(child.get());
ChildFrameDisconnector(child.get()).disconnect();
// FIXME: In theory this can fire focus events when the selection
// changes, but there's no obvious way to test it.
document()->nodeWillBeRemoved(child.get());
// If an event moved the child start over.
if (child != m_firstChild)
continue;
mutation.willRemoveChild(child.get());
child->notifyMutationObserversNodeWillDetach();
removeBetween(0, child->nextSibling(), child.get());
removedChildren.append(child.release());
}
// FIXME: We could avoid walking all the children twice by calling
// notify inside the loop and childrenChanged after but that would mean
// calling childrenChanged in a different order than all other methods.
// Figure out if this is safe.
childrenChanged(false, 0, 0, -static_cast<int>(removedChildren.size()));
for (size_t i = 0; i < removedChildren.size(); ++i)
ChildNodeRemovalNotifier(this).notify(removedChildren[i].get());
}
dispatchSubtreeModifiedEvent();
}
// this differs from other remove functions because it forcibly removes all the children,
// regardless of read-only status or event exceptions, e.g.
void ContainerNode::removeChildren()
{
if (!m_firstChild)
return;
// The container node can be removed from event handlers.
Ref<ContainerNode> protect(*this);
// exclude this node when looking for removed focusedNode since only children will be removed
document().removeFocusedNodeOfSubtree(this, true);
#if ENABLE(FULLSCREEN_API)
document().removeFullScreenElementOfSubtree(this, true);
#endif
// Do any prep work needed before actually starting to detach
// and remove... e.g. stop loading frames, fire unload events.
willRemoveChildren(*this);
NodeVector removedChildren;
{
WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates;
{
NoEventDispatchAssertion assertNoEventDispatch;
removedChildren.reserveInitialCapacity(countChildNodes());
while (RefPtr<Node> n = m_firstChild) {
removedChildren.append(*m_firstChild);
removeBetween(0, m_firstChild->nextSibling(), *m_firstChild);
}
}
ChildChange change = { AllChildrenRemoved, nullptr, nullptr, ChildChangeSourceAPI };
childrenChanged(change);
for (size_t i = 0; i < removedChildren.size(); ++i)
ChildNodeRemovalNotifier(*this).notify(removedChildren[i].get());
}
if (document().svgExtensions()) {
Element* shadowHost = this->shadowHost();
if (!shadowHost || !shadowHost->hasTagName(SVGNames::useTag))
document().accessSVGExtensions()->rebuildElements();
}
dispatchSubtreeModifiedEvent();
}
void ElementShadow::removeAllShadowRoots()
{
// Dont protect this ref count.
Element* shadowHost = host();
ASSERT(shadowHost);
while (RefPtr<ShadowRoot> oldRoot = m_shadowRoots.head()) {
InspectorInstrumentation::willPopShadowRoot(shadowHost, oldRoot.get());
shadowHost->document().removeFocusedElementOfSubtree(oldRoot.get());
m_shadowRoots.removeHead();
oldRoot->setParentOrShadowHostNode(0);
oldRoot->setParentTreeScope(&shadowHost->document());
oldRoot->setPrev(0);
oldRoot->setNext(0);
ChildNodeRemovalNotifier(*shadowHost).notify(*oldRoot);
}
}
void ContainerNode::parserRemoveChild(Node* oldChild)
{
ASSERT(oldChild);
ASSERT(oldChild->parentNode() == this);
ASSERT(!oldChild->isDocumentFragment());
Node* prev = oldChild->previousSibling();
Node* next = oldChild->nextSibling();
oldChild->updateAncestorConnectedSubframeCountForRemoval();
ChildListMutationScope(this).willRemoveChild(oldChild);
oldChild->notifyMutationObserversNodeWillDetach();
removeBetween(prev, next, oldChild);
childrenChanged(true, prev, next, -1);
ChildNodeRemovalNotifier(this).notify(oldChild);
}
void ContainerNode::parserRemoveChild(Node& oldChild)
{
ASSERT(oldChild.parentNode() == this);
ASSERT(!oldChild.isDocumentFragment());
Node* prev = oldChild.previousSibling();
Node* next = oldChild.nextSibling();
oldChild.updateAncestorConnectedSubframeCountForRemoval();
ChildListMutationScope(*this).willRemoveChild(oldChild);
oldChild.notifyMutationObserversNodeWillDetach();
removeBetween(prev, next, oldChild);
notifyChildRemoved(oldChild, prev, next, ChildChangeSourceParser);
ChildNodeRemovalNotifier(*this).notify(oldChild);
}
void ElementShadow::removeShadowRoot()
{
// Dont protect this ref count.
Element* shadowHost = host();
if (RefPtr<ShadowRoot> oldRoot = m_shadowRoot) {
InspectorInstrumentation::willPopShadowRoot(shadowHost, oldRoot.get());
shadowHost->document()->removeFocusedNodeOfSubtree(oldRoot.get());
if (oldRoot->attached())
oldRoot->detach();
m_shadowRoot = 0;
oldRoot->setParentOrShadowHostNode(0);
oldRoot->setParentTreeScope(shadowHost->document());
ChildNodeRemovalNotifier(shadowHost).notify(oldRoot.get());
}
m_distributor.invalidateDistribution(shadowHost);
}
// this differs from other remove functions because it forcibly removes all the children,
// regardless of read-only status or event exceptions, e.g.
void ContainerNode::removeChildren()
{
if (!m_firstChild)
return;
// The container node can be removed from event handlers.
RefPtr<ContainerNode> protect(this);
// exclude this node when looking for removed focusedNode since only children will be removed
document().removeFocusedNodeOfSubtree(this, true);
#if ENABLE(FULLSCREEN_API)
document().removeFullScreenElementOfSubtree(this, true);
#endif
// Do any prep work needed before actually starting to detach
// and remove... e.g. stop loading frames, fire unload events.
willRemoveChildren(protect.get());
NodeVector removedChildren;
{
WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates;
{
NoEventDispatchAssertion assertNoEventDispatch;
removedChildren.reserveInitialCapacity(childNodeCount());
while (RefPtr<Node> n = m_firstChild) {
removedChildren.append(m_firstChild);
removeBetween(0, m_firstChild->nextSibling(), m_firstChild);
}
}
childrenChanged(false, 0, 0, -static_cast<int>(removedChildren.size()));
for (size_t i = 0; i < removedChildren.size(); ++i)
ChildNodeRemovalNotifier(this).notify(removedChildren[i].get());
}
dispatchSubtreeModifiedEvent();
}
// this differs from other remove functions because it forcibly removes all the children,
// regardless of read-only status or event exceptions, e.g.
void ContainerNode::removeChildren()
{
if (!m_firstChild)
return;
// The container node can be removed from event handlers.
RefPtr<ContainerNode> protect(this);
// exclude this node when looking for removed focusedNode since only children will be removed
document()->removeFocusedNodeOfSubtree(this, true);
#if ENABLE(FULLSCREEN_API)
document()->removeFullScreenElementOfSubtree(this, true);
#endif
// Do any prep work needed before actually starting to detach
// and remove... e.g. stop loading frames, fire unload events.
willRemoveChildren(protect.get());
Vector<RefPtr<Node>, 10> removedChildren;
{
WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates;
NoEventDispatchAssertion assertNoEventDispatch;
removedChildren.reserveInitialCapacity(childNodeCount());
while (RefPtr<Node> n = m_firstChild) {
Node* next = n->nextSibling();
// Remove the node from the tree before calling detach or removedFromDocument (4427024, 4129744).
// removeChild() does this after calling detach(). There is no explanation for
// this discrepancy between removeChild() and its optimized version removeChildren().
n->setPreviousSibling(0);
n->setNextSibling(0);
n->setParentOrHostNode(0);
document()->adoptIfNeeded(n.get());
m_firstChild = next;
if (n == m_lastChild)
m_lastChild = 0;
removedChildren.append(n.release());
}
size_t removedChildrenCount = removedChildren.size();
size_t i;
// Detach the nodes only after properly removed from the tree because
// a. detaching requires a proper DOM tree (for counters and quotes for
// example) and during the previous loop the next sibling still points to
// the node being removed while the node being removed does not point back
// and does not point to the same parent as its next sibling.
// b. destroying Renderers of standalone nodes is sometimes faster.
for (i = 0; i < removedChildrenCount; ++i) {
Node* removedChild = removedChildren[i].get();
if (removedChild->attached())
removedChild->detach();
}
childrenChanged(false, 0, 0, -static_cast<int>(removedChildrenCount));
for (i = 0; i < removedChildrenCount; ++i)
ChildNodeRemovalNotifier(this).notify(removedChildren[i].get());
}
dispatchSubtreeModifiedEvent();
}
bool ContainerNode::removeChild(Node* oldChild, ExceptionCode& ec)
{
// 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());
Ref<ContainerNode> protect(*this);
ec = 0;
// NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
if (isReadOnlyNode()) {
ec = NO_MODIFICATION_ALLOWED_ERR;
return false;
}
// NOT_FOUND_ERR: Raised if oldChild is not a child of this node.
if (!oldChild || oldChild->parentNode() != this) {
ec = NOT_FOUND_ERR;
return false;
}
Ref<Node> child(*oldChild);
document().removeFocusedNodeOfSubtree(&child.get());
#if ENABLE(FULLSCREEN_API)
document().removeFullScreenElementOfSubtree(&child.get());
#endif
// Events fired when blurring currently focused node might have moved this
// child into a different parent.
if (child->parentNode() != this) {
ec = NOT_FOUND_ERR;
return false;
}
willRemoveChild(child.get());
// Mutation events might have moved this child into a different parent.
if (child->parentNode() != this) {
ec = NOT_FOUND_ERR;
return false;
}
{
WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates;
Node* prev = child->previousSibling();
Node* next = child->nextSibling();
removeBetween(prev, next, child.get());
notifyChildRemoved(child.get(), prev, next, ChildChangeSourceAPI);
ChildNodeRemovalNotifier(*this).notify(child.get());
}
if (document().svgExtensions()) {
Element* shadowHost = this->shadowHost();
if (!shadowHost || !shadowHost->hasTagName(SVGNames::useTag))
document().accessSVGExtensions()->rebuildElements();
}
dispatchSubtreeModifiedEvent();
return true;
}
