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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/DocGroup.h"
#include "mozilla/dom/HTMLSlotElement.h"
#include "mozilla/dom/HTMLSlotElementBinding.h"
#include "mozilla/dom/HTMLUnknownElement.h"
#include "mozilla/dom/ShadowRoot.h"
#include "nsGkAtoms.h"
#include "nsDocument.h"
nsGenericHTMLElement*
NS_NewHTMLSlotElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
mozilla::dom::FromParser aFromParser)
{
RefPtr<mozilla::dom::NodeInfo> nodeInfo(aNodeInfo);
if (nsDocument::IsWebComponentsEnabled(nodeInfo->GetDocument())) {
already_AddRefed<mozilla::dom::NodeInfo> nodeInfoArg(nodeInfo.forget());
return new mozilla::dom::HTMLSlotElement(nodeInfoArg);
}
already_AddRefed<mozilla::dom::NodeInfo> nodeInfoArg(nodeInfo.forget());
return new mozilla::dom::HTMLUnknownElement(nodeInfoArg);
}
namespace mozilla {
namespace dom {
HTMLSlotElement::HTMLSlotElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: nsGenericHTMLElement(aNodeInfo)
{
}
HTMLSlotElement::~HTMLSlotElement()
{
}
NS_IMPL_ADDREF_INHERITED(HTMLSlotElement, nsGenericHTMLElement)
NS_IMPL_RELEASE_INHERITED(HTMLSlotElement, nsGenericHTMLElement)
NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLSlotElement,
nsGenericHTMLElement,
mAssignedNodes)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(HTMLSlotElement)
NS_INTERFACE_MAP_END_INHERITING(nsGenericHTMLElement)
NS_IMPL_ELEMENT_CLONE(HTMLSlotElement)
nsresult
HTMLSlotElement::BindToTree(nsIDocument* aDocument,
nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers)
{
RefPtr<ShadowRoot> oldContainingShadow = GetContainingShadow();
nsresult rv = nsGenericHTMLElement::BindToTree(aDocument, aParent,
aBindingParent,
aCompileEventHandlers);
NS_ENSURE_SUCCESS(rv, rv);
ShadowRoot* containingShadow = GetContainingShadow();
if (containingShadow && !oldContainingShadow) {
containingShadow->AddSlot(this);
}
return NS_OK;
}
void
HTMLSlotElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
RefPtr<ShadowRoot> oldContainingShadow = GetContainingShadow();
nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
if (oldContainingShadow && !GetContainingShadow()) {
oldContainingShadow->RemoveSlot(this);
}
}
nsresult
HTMLSlotElement::BeforeSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
const nsAttrValueOrString* aValue,
bool aNotify)
{
if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::name) {
if (ShadowRoot* containingShadow = GetContainingShadow()) {
containingShadow->RemoveSlot(this);
}
}
return nsGenericHTMLElement::BeforeSetAttr(aNameSpaceID, aName, aValue,
aNotify);
}
nsresult
HTMLSlotElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
bool aNotify)
{
if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::name) {
if (ShadowRoot* containingShadow = GetContainingShadow()) {
containingShadow->AddSlot(this);
}
}
if (nsIContent* parent = GetParent()) {
if (parent->IsElement()) {
nsLayoutUtils::PostRestyleEvent(
parent->AsElement(), eRestyle_Subtree, nsChangeHint(0));
}
}
return nsGenericHTMLElement::AfterSetAttr(aNameSpaceID, aName, aValue,
aOldValue, aNotify);
}
/**
* Flatten assigned nodes given a slot, as in:
* https://dom.spec.whatwg.org/#find-flattened-slotables
*/
static void
FlattenAssignedNodes(HTMLSlotElement* aSlot, nsTArray<RefPtr<nsINode>>& aNodes)
{
if (!aSlot->GetContainingShadow()) {
return;
}
const nsTArray<RefPtr<nsINode>>& assignedNodes = aSlot->AssignedNodes();
// If assignedNodes is empty, use children of slot as fallback content.
if (assignedNodes.IsEmpty()) {
for (nsIContent* child = aSlot->AsContent()->GetFirstChild();
child;
child = child->GetNextSibling()) {
if (!child->IsSlotable()) {
continue;
}
if (child->IsHTMLElement(nsGkAtoms::slot)) {
FlattenAssignedNodes(HTMLSlotElement::FromContent(child), aNodes);
} else {
aNodes.AppendElement(child);
}
}
return;
}
for (uint32_t i = 0; i < assignedNodes.Length(); i++) {
nsINode* assignedNode = assignedNodes[i];
if (assignedNode->IsHTMLElement(nsGkAtoms::slot)) {
FlattenAssignedNodes(
HTMLSlotElement::FromContent(assignedNode->AsContent()), aNodes);
} else {
aNodes.AppendElement(assignedNode);
}
}
}
void
HTMLSlotElement::AssignedNodes(const AssignedNodesOptions& aOptions,
nsTArray<RefPtr<nsINode>>& aNodes)
{
if (aOptions.mFlatten) {
return FlattenAssignedNodes(this, aNodes);
}
aNodes = mAssignedNodes;
}
void HTMLSlotElement::AssignedElements(const AssignedNodesOptions& aOptions,
nsTArray<RefPtr<Element>>& aElements) {
AutoTArray<RefPtr<nsINode>, 128> assignedNodes;
AssignedNodes(aOptions, assignedNodes);
for (const RefPtr<nsINode>& assignedNode : assignedNodes) {
if (assignedNode->IsElement()) {
aElements.AppendElement(assignedNode->AsElement());
}
}
}
const nsTArray<RefPtr<nsINode>>&
HTMLSlotElement::AssignedNodes() const
{
return mAssignedNodes;
}
void
HTMLSlotElement::InsertAssignedNode(uint32_t aIndex, nsINode* aNode)
{
mAssignedNodes.InsertElementAt(aIndex, aNode);
aNode->AsContent()->SetAssignedSlot(this);
}
void
HTMLSlotElement::AppendAssignedNode(nsINode* aNode)
{
mAssignedNodes.AppendElement(aNode);
aNode->AsContent()->SetAssignedSlot(this);
}
void
HTMLSlotElement::RemoveAssignedNode(nsINode* aNode)
{
mAssignedNodes.RemoveElement(aNode);
aNode->AsContent()->SetAssignedSlot(nullptr);
}
void
HTMLSlotElement::ClearAssignedNodes()
{
for (uint32_t i = 0; i < mAssignedNodes.Length(); i++) {
mAssignedNodes[i]->AsContent()->SetAssignedSlot(nullptr);
}
mAssignedNodes.Clear();
}
void
HTMLSlotElement::EnqueueSlotChangeEvent() const
{
DocGroup* docGroup = OwnerDoc()->GetDocGroup();
if (!docGroup) {
return;
}
docGroup->SignalSlotChange(this);
}
void
HTMLSlotElement::FireSlotChangeEvent()
{
nsContentUtils::DispatchTrustedEvent(OwnerDoc(),
static_cast<nsIContent*>(this),
NS_LITERAL_STRING("slotchange"), true,
false);
}
JSObject*
HTMLSlotElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return HTMLSlotElementBinding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla
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