diff options
Diffstat (limited to 'dom/html/HTMLSlotElement.cpp')
| -rw-r--r-- | dom/html/HTMLSlotElement.cpp | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/dom/html/HTMLSlotElement.cpp b/dom/html/HTMLSlotElement.cpp new file mode 100644 index 000000000..e2dc3d8ff --- /dev/null +++ b/dom/html/HTMLSlotElement.cpp @@ -0,0 +1,245 @@ +/* -*- 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); + } + } + + 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 |