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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef mozilla_dom_shadowroot_h__
#define mozilla_dom_shadowroot_h__
#include "mozilla/dom/DocumentFragment.h"
#include "mozilla/dom/StyleSheetList.h"
#include "mozilla/StyleSheet.h"
#include "nsCOMPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIContentInlines.h"
#include "nsTHashtable.h"
#include "nsDocument.h"
class nsIAtom;
class nsIContent;
class nsXBLPrototypeBinding;
namespace mozilla {
namespace dom {
class Element;
class HTMLContentElement;
class HTMLShadowElement;
class ShadowRootStyleSheetList;
class ShadowRoot final : public DocumentFragment,
public nsStubMutationObserver
{
friend class ShadowRootStyleSheetList;
public:
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ShadowRoot,
DocumentFragment)
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
ShadowRoot(Element* aElement, already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
nsXBLPrototypeBinding* aProtoBinding);
void AddToIdTable(Element* aElement, nsIAtom* aId);
void RemoveFromIdTable(Element* aElement, nsIAtom* aId);
void InsertSheet(StyleSheet* aSheet, nsIContent* aLinkingContent);
void RemoveSheet(StyleSheet* aSheet);
bool ApplyAuthorStyles();
void SetApplyAuthorStyles(bool aApplyAuthorStyles);
StyleSheetList* StyleSheets();
HTMLShadowElement* GetShadowElement() { return mShadowElement; }
/**
* Sets the current shadow insertion point where the older
* ShadowRoot will be projected.
*/
void SetShadowElement(HTMLShadowElement* aShadowElement);
/**
* Change the node that populates the distribution pool with
* its children. This is distinct from the ShadowRoot host described
* in the specifications. The ShadowRoot host is the element
* which created this ShadowRoot and does not change. The pool host
* is the same as the ShadowRoot host if this is the youngest
* ShadowRoot. If this is an older ShadowRoot, the pool host is
* the <shadow> element in the younger ShadowRoot (if it exists).
*/
void ChangePoolHost(nsIContent* aNewHost);
/**
* Distributes a single explicit child of the pool host to the content
* insertion points in this ShadowRoot.
*/
void DistributeSingleNode(nsIContent* aContent);
/**
* Removes a single explicit child of the pool host from the content
* insertion points in this ShadowRoot.
*/
void RemoveDistributedNode(nsIContent* aContent);
/**
* Distributes all the explicit children of the pool host to the content
* insertion points in this ShadowRoot.
*/
void DistributeAllNodes();
void AddInsertionPoint(HTMLContentElement* aInsertionPoint);
void RemoveInsertionPoint(HTMLContentElement* aInsertionPoint);
void SetYoungerShadow(ShadowRoot* aYoungerShadow);
ShadowRoot* GetYoungerShadowRoot() { return mYoungerShadow; }
void SetInsertionPointChanged() { mInsertionPointChanged = true; }
void SetAssociatedBinding(nsXBLBinding* aBinding) { mAssociatedBinding = aBinding; }
nsISupports* GetParentObject() const { return mPoolHost; }
nsIContent* GetPoolHost() { return mPoolHost; }
nsTArray<HTMLShadowElement*>& ShadowDescendants() { return mShadowDescendants; }
JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
static bool IsPooledNode(nsIContent* aChild, nsIContent* aContainer,
nsIContent* aHost);
static ShadowRoot* FromNode(nsINode* aNode);
static bool IsShadowInsertionPoint(nsIContent* aContent);
static void RemoveDestInsertionPoint(nsIContent* aInsertionPoint,
nsTArray<nsIContent*>& aDestInsertionPoints);
// WebIDL methods.
Element* GetElementById(const nsAString& aElementId);
already_AddRefed<nsContentList>
GetElementsByTagName(const nsAString& aNamespaceURI);
already_AddRefed<nsContentList>
GetElementsByTagNameNS(const nsAString& aNamespaceURI,
const nsAString& aLocalName);
already_AddRefed<nsContentList>
GetElementsByClassName(const nsAString& aClasses);
void GetInnerHTML(nsAString& aInnerHTML);
void SetInnerHTML(const nsAString& aInnerHTML, ErrorResult& aError);
Element* Host();
ShadowRoot* GetOlderShadowRoot() { return mOlderShadow; }
void StyleSheetChanged();
bool IsComposedDocParticipant() { return mIsComposedDocParticipant; }
void SetIsComposedDocParticipant(bool aIsComposedDocParticipant)
{
mIsComposedDocParticipant = aIsComposedDocParticipant;
}
virtual void DestroyContent() override;
protected:
virtual ~ShadowRoot();
// The pool host is the parent of the nodes that will be distributed
// into the insertion points in this ShadowRoot. See |ChangeShadowRoot|.
nsCOMPtr<nsIContent> mPoolHost;
// An array of content insertion points that are a descendant of the ShadowRoot
// sorted in tree order. Insertion points are responsible for notifying
// the ShadowRoot when they are removed or added as a descendant. The insertion
// points are kept alive by the parent node, thus weak references are held
// by the array.
nsTArray<HTMLContentElement*> mInsertionPoints;
// An array of the <shadow> elements that are descendant of the ShadowRoot
// sorted in tree order. Only the first may be a shadow insertion point.
nsTArray<HTMLShadowElement*> mShadowDescendants;
nsTHashtable<nsIdentifierMapEntry> mIdentifierMap;
nsXBLPrototypeBinding* mProtoBinding;
// It is necessary to hold a reference to the associated nsXBLBinding
// because the binding holds a reference on the nsXBLDocumentInfo that
// owns |mProtoBinding|.
RefPtr<nsXBLBinding> mAssociatedBinding;
RefPtr<ShadowRootStyleSheetList> mStyleSheetList;
// The current shadow insertion point of this ShadowRoot.
HTMLShadowElement* mShadowElement;
// The ShadowRoot that was created by the host element before
// this ShadowRoot was created.
RefPtr<ShadowRoot> mOlderShadow;
// The ShadowRoot that was created by the host element after
// this ShadowRoot was created.
RefPtr<ShadowRoot> mYoungerShadow;
// A boolean that indicates that an insertion point was added or removed
// from this ShadowRoot and that the nodes need to be redistributed into
// the insertion points. After this flag is set, nodes will be distributed
// on the next mutation event.
bool mInsertionPointChanged;
// Flag to indicate whether the descendants of this shadow root are part of the
// composed document. Ideally, we would use a node flag on nodes to
// mark whether it is in the composed document, but we have run out of flags
// so instead we track it here.
bool mIsComposedDocParticipant;
nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const override;
};
class ShadowRootStyleSheetList : public StyleSheetList
{
public:
explicit ShadowRootStyleSheetList(ShadowRoot* aShadowRoot);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ShadowRootStyleSheetList, StyleSheetList)
virtual nsINode* GetParentObject() const override
{
return mShadowRoot;
}
uint32_t Length() override;
StyleSheet* IndexedGetter(uint32_t aIndex, bool& aFound) override;
protected:
virtual ~ShadowRootStyleSheetList();
RefPtr<ShadowRoot> mShadowRoot;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_shadowroot_h__
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