зеркало из https://github.com/mozilla/gecko-dev.git
633 строки
22 KiB
C++
633 строки
22 KiB
C++
/* -*- 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/. */
|
|
|
|
/*
|
|
* nsBaseContentList is a basic list of content nodes; nsContentList
|
|
* is a commonly used NodeList implementation (used for
|
|
* getElementsByTagName, some properties on HTMLDocument/Document, etc).
|
|
*/
|
|
|
|
#ifndef nsContentList_h___
|
|
#define nsContentList_h___
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "nsContentListDeclarations.h"
|
|
#include "nsISupports.h"
|
|
#include "nsTArray.h"
|
|
#include "nsString.h"
|
|
#include "nsIHTMLCollection.h"
|
|
#include "nsINodeList.h"
|
|
#include "nsStubMutationObserver.h"
|
|
#include "nsAtom.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
#include "nsNameSpaceManager.h"
|
|
#include "nsWrapperCache.h"
|
|
#include "nsHashKeys.h"
|
|
#include "mozilla/HashFunctions.h"
|
|
#include "mozilla/MemoryReporting.h"
|
|
#include "mozilla/dom/NameSpaceConstants.h"
|
|
|
|
// XXX Avoid including this here by moving function bodies to the cpp file.
|
|
#include "nsIContent.h"
|
|
|
|
namespace mozilla::dom {
|
|
class Element;
|
|
} // namespace mozilla::dom
|
|
|
|
class nsBaseContentList : public nsINodeList {
|
|
protected:
|
|
using Element = mozilla::dom::Element;
|
|
|
|
public:
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
|
|
// nsINodeList
|
|
int32_t IndexOf(nsIContent* aContent) override;
|
|
nsIContent* Item(uint32_t aIndex) override;
|
|
|
|
uint32_t Length() override { return mElements.Length(); }
|
|
|
|
NS_DECL_CYCLE_COLLECTION_SKIPPABLE_WRAPPERCACHE_CLASS(nsBaseContentList)
|
|
|
|
void AppendElement(nsIContent* aContent) {
|
|
MOZ_ASSERT(aContent);
|
|
mElements.AppendElement(aContent);
|
|
}
|
|
void MaybeAppendElement(nsIContent* aContent) {
|
|
if (aContent) {
|
|
AppendElement(aContent);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Insert the element at a given index, shifting the objects at
|
|
* the given index and later to make space.
|
|
* @param aContent Element to insert, must not be null
|
|
* @param aIndex Index to insert the element at.
|
|
*/
|
|
void InsertElementAt(nsIContent* aContent, int32_t aIndex) {
|
|
NS_ASSERTION(aContent, "Element to insert must not be null");
|
|
mElements.InsertElementAt(aIndex, aContent);
|
|
}
|
|
|
|
void RemoveElement(nsIContent* aContent) {
|
|
mElements.RemoveElement(aContent);
|
|
}
|
|
|
|
void Reset() { mElements.Clear(); }
|
|
|
|
virtual int32_t IndexOf(nsIContent* aContent, bool aDoFlush);
|
|
|
|
JSObject* WrapObject(JSContext* cx,
|
|
JS::Handle<JSObject*> aGivenProto) override = 0;
|
|
|
|
void SetCapacity(uint32_t aCapacity) { mElements.SetCapacity(aCapacity); }
|
|
|
|
virtual void LastRelease() {}
|
|
|
|
// Memory reporting. For now, subclasses of nsBaseContentList don't really
|
|
// need to report any members that are not part of the object itself, so we
|
|
// don't need to make this virtual.
|
|
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
|
|
|
|
protected:
|
|
virtual ~nsBaseContentList();
|
|
|
|
/**
|
|
* To be called from non-destructor locations (e.g. unlink) that want to
|
|
* remove from caches. Cacheable subclasses should override.
|
|
*/
|
|
virtual void RemoveFromCaches() {}
|
|
|
|
AutoTArray<nsCOMPtr<nsIContent>, 10> mElements;
|
|
};
|
|
|
|
class nsSimpleContentList : public nsBaseContentList {
|
|
public:
|
|
explicit nsSimpleContentList(nsINode* aRoot)
|
|
: nsBaseContentList(), mRoot(aRoot) {}
|
|
|
|
NS_DECL_ISUPPORTS_INHERITED
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsSimpleContentList,
|
|
nsBaseContentList)
|
|
|
|
nsINode* GetParentObject() override { return mRoot; }
|
|
JSObject* WrapObject(JSContext* cx,
|
|
JS::Handle<JSObject*> aGivenProto) override;
|
|
|
|
protected:
|
|
virtual ~nsSimpleContentList() = default;
|
|
|
|
private:
|
|
// This has to be a strong reference, the root might go away before the list.
|
|
nsCOMPtr<nsINode> mRoot;
|
|
};
|
|
|
|
// Used for returning lists that will always be empty, such as the applets list
|
|
// in HTML Documents
|
|
class nsEmptyContentList final : public nsBaseContentList,
|
|
public nsIHTMLCollection {
|
|
public:
|
|
explicit nsEmptyContentList(nsINode* aRoot)
|
|
: nsBaseContentList(), mRoot(aRoot) {}
|
|
|
|
NS_DECL_ISUPPORTS_INHERITED
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsEmptyContentList,
|
|
nsBaseContentList)
|
|
|
|
nsINode* GetParentObject() override { return mRoot; }
|
|
|
|
JSObject* WrapObject(JSContext* cx,
|
|
JS::Handle<JSObject*> aGivenProto) override;
|
|
|
|
JSObject* GetWrapperPreserveColorInternal() override {
|
|
return nsWrapperCache::GetWrapperPreserveColor();
|
|
}
|
|
void PreserveWrapperInternal(nsISupports* aScriptObjectHolder) override {
|
|
nsWrapperCache::PreserveWrapper(aScriptObjectHolder);
|
|
}
|
|
|
|
uint32_t Length() final { return 0; }
|
|
nsIContent* Item(uint32_t aIndex) override;
|
|
Element* GetElementAt(uint32_t index) override;
|
|
Element* GetFirstNamedElement(const nsAString& aName, bool& aFound) override;
|
|
void GetSupportedNames(nsTArray<nsString>& aNames) override;
|
|
|
|
protected:
|
|
virtual ~nsEmptyContentList() = default;
|
|
|
|
private:
|
|
// This has to be a strong reference, the root might go away before the list.
|
|
nsCOMPtr<nsINode> mRoot;
|
|
};
|
|
|
|
/**
|
|
* Class that's used as the key to hash nsContentList implementations
|
|
* for fast retrieval
|
|
*/
|
|
struct nsContentListKey {
|
|
// We have to take an aIsHTMLDocument arg for two reasons:
|
|
// 1) We don't want to include Document.h in this header.
|
|
// 2) We need to do that to make nsContentList::RemoveFromHashtable
|
|
// work, because by the time it's called the document of the
|
|
// list's root node might have changed.
|
|
nsContentListKey(nsINode* aRootNode, int32_t aMatchNameSpaceId,
|
|
const nsAString& aTagname, bool aIsHTMLDocument)
|
|
: mRootNode(aRootNode),
|
|
mMatchNameSpaceId(aMatchNameSpaceId),
|
|
mTagname(aTagname),
|
|
mIsHTMLDocument(aIsHTMLDocument),
|
|
mHash(mozilla::AddToHash(mozilla::HashString(aTagname), mRootNode,
|
|
mMatchNameSpaceId, mIsHTMLDocument)) {}
|
|
|
|
nsContentListKey(const nsContentListKey& aContentListKey) = default;
|
|
|
|
inline uint32_t GetHash(void) const { return mHash; }
|
|
|
|
nsINode* const mRootNode; // Weak ref
|
|
const int32_t mMatchNameSpaceId;
|
|
const nsAString& mTagname;
|
|
bool mIsHTMLDocument;
|
|
const uint32_t mHash;
|
|
};
|
|
|
|
/**
|
|
* Class that implements a possibly live NodeList that matches Elements
|
|
* in the tree based on some criterion.
|
|
*/
|
|
class nsContentList : public nsBaseContentList,
|
|
public nsIHTMLCollection,
|
|
public nsStubMutationObserver {
|
|
protected:
|
|
enum class State : uint8_t {
|
|
// The list is up to date and need not do any walking to be able to answer
|
|
// any questions anyone may have.
|
|
UpToDate = 0,
|
|
// The list contains no useful information and if anyone asks it anything it
|
|
// will have to populate itself before answering.
|
|
Dirty,
|
|
// The list has populated itself to a certain extent and that that part of
|
|
// the list is still valid. Requests for things outside that part of the
|
|
// list will require walking the tree some more. When a list is in this
|
|
// state, the last thing in mElements is the last node in the tree that the
|
|
// list looked at.
|
|
Lazy,
|
|
};
|
|
|
|
public:
|
|
NS_DECL_ISUPPORTS_INHERITED
|
|
|
|
/**
|
|
* @param aRootNode The node under which to limit our search.
|
|
* @param aMatchAtom An atom whose meaning depends on aMatchNameSpaceId.
|
|
* The special value "*" always matches whatever aMatchAtom
|
|
* is matched against.
|
|
* @param aMatchNameSpaceId If kNameSpaceID_Unknown, then aMatchAtom is the
|
|
* tagName to match.
|
|
* If kNameSpaceID_Wildcard, then aMatchAtom is the
|
|
* localName to match.
|
|
* Otherwise we match nodes whose namespace is
|
|
* aMatchNameSpaceId and localName matches
|
|
* aMatchAtom.
|
|
* @param aDeep If false, then look only at children of the root, nothing
|
|
* deeper. If true, then look at the whole subtree rooted at
|
|
* our root.
|
|
* @param aLiveList Whether the created list should be a live list observing
|
|
* mutations to the DOM tree.
|
|
*/
|
|
nsContentList(nsINode* aRootNode, int32_t aMatchNameSpaceId,
|
|
nsAtom* aHTMLMatchAtom, nsAtom* aXMLMatchAtom,
|
|
bool aDeep = true, bool aLiveList = true);
|
|
|
|
/**
|
|
* @param aRootNode The node under which to limit our search.
|
|
* @param aFunc the function to be called to determine whether we match.
|
|
* This function MUST NOT ever cause mutation of the DOM.
|
|
* The nsContentList implementation guarantees that everything
|
|
* passed to the function will be IsElement().
|
|
* @param aDestroyFunc the function that will be called to destroy aData
|
|
* @param aData closure data that will need to be passed back to aFunc
|
|
* @param aDeep If false, then look only at children of the root, nothing
|
|
* deeper. If true, then look at the whole subtree rooted at
|
|
* our root.
|
|
* @param aMatchAtom an atom to be passed back to aFunc
|
|
* @param aMatchNameSpaceId a namespace id to be passed back to aFunc
|
|
* @param aFuncMayDependOnAttr a boolean that indicates whether this list is
|
|
* sensitive to attribute changes.
|
|
* @param aLiveList Whether the created list should be a live list observing
|
|
* mutations to the DOM tree.
|
|
*/
|
|
nsContentList(nsINode* aRootNode, nsContentListMatchFunc aFunc,
|
|
nsContentListDestroyFunc aDestroyFunc, void* aData,
|
|
bool aDeep = true, nsAtom* aMatchAtom = nullptr,
|
|
int32_t aMatchNameSpaceId = kNameSpaceID_None,
|
|
bool aFuncMayDependOnAttr = true, bool aLiveList = true);
|
|
|
|
// nsWrapperCache
|
|
using nsWrapperCache::GetWrapperPreserveColor;
|
|
using nsWrapperCache::PreserveWrapper;
|
|
JSObject* WrapObject(JSContext* aCx,
|
|
JS::Handle<JSObject*> aGivenProto) override;
|
|
|
|
protected:
|
|
virtual ~nsContentList();
|
|
|
|
JSObject* GetWrapperPreserveColorInternal() override {
|
|
return nsWrapperCache::GetWrapperPreserveColor();
|
|
}
|
|
void PreserveWrapperInternal(nsISupports* aScriptObjectHolder) override {
|
|
nsWrapperCache::PreserveWrapper(aScriptObjectHolder);
|
|
}
|
|
|
|
public:
|
|
// nsBaseContentList overrides
|
|
int32_t IndexOf(nsIContent* aContent, bool aDoFlush) override;
|
|
int32_t IndexOf(nsIContent* aContent) override;
|
|
nsINode* GetParentObject() override { return mRootNode; }
|
|
|
|
uint32_t Length() final { return Length(true); }
|
|
nsIContent* Item(uint32_t aIndex) final;
|
|
Element* GetElementAt(uint32_t index) override;
|
|
Element* GetFirstNamedElement(const nsAString& aName, bool& aFound) override {
|
|
Element* item = NamedItem(aName, true);
|
|
aFound = !!item;
|
|
return item;
|
|
}
|
|
void GetSupportedNames(nsTArray<nsString>& aNames) override;
|
|
|
|
// nsContentList public methods
|
|
uint32_t Length(bool aDoFlush);
|
|
nsIContent* Item(uint32_t aIndex, bool aDoFlush);
|
|
Element* NamedItem(const nsAString& aName, bool aDoFlush);
|
|
|
|
// nsIMutationObserver
|
|
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
|
|
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
|
|
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
|
|
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
|
|
NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
|
|
|
|
static nsContentList* FromSupports(nsISupports* aSupports) {
|
|
nsINodeList* list = static_cast<nsINodeList*>(aSupports);
|
|
#ifdef DEBUG
|
|
{
|
|
nsCOMPtr<nsINodeList> list_qi = do_QueryInterface(aSupports);
|
|
|
|
// If this assertion fires the QI implementation for the object in
|
|
// question doesn't use the nsINodeList pointer as the nsISupports
|
|
// pointer. That must be fixed, or we'll crash...
|
|
NS_ASSERTION(list_qi == list, "Uh, fix QI!");
|
|
}
|
|
#endif
|
|
return static_cast<nsContentList*>(list);
|
|
}
|
|
|
|
bool MatchesKey(const nsContentListKey& aKey) const {
|
|
// The root node is most commonly the same: the document. And the
|
|
// most common namespace id is kNameSpaceID_Unknown. So check the
|
|
// string first. Cases in which whether our root's ownerDocument
|
|
// is HTML changes are extremely rare, so check those last.
|
|
MOZ_ASSERT(mXMLMatchAtom,
|
|
"How did we get here with a null match atom on our list?");
|
|
return mXMLMatchAtom->Equals(aKey.mTagname) &&
|
|
mRootNode == aKey.mRootNode &&
|
|
mMatchNameSpaceId == aKey.mMatchNameSpaceId &&
|
|
mIsHTMLDocument == aKey.mIsHTMLDocument;
|
|
}
|
|
|
|
/**
|
|
* Sets the state to LIST_DIRTY and clears mElements array.
|
|
* @note This is the only acceptable way to set state to LIST_DIRTY.
|
|
*/
|
|
void SetDirty() {
|
|
mState = State::Dirty;
|
|
InvalidateNamedItemsCache();
|
|
Reset();
|
|
}
|
|
|
|
void LastRelease() override;
|
|
|
|
protected:
|
|
// A cache from name to the first named item in mElements. Only possibly
|
|
// non-null when mState is State::UpToDate. Elements are kept alive by our
|
|
// mElements array.
|
|
using NamedItemsCache = nsTHashMap<RefPtr<nsAtom>, Element*>;
|
|
|
|
void InvalidateNamedItemsCache() {
|
|
mNamedItemsCache = nullptr;
|
|
mNamedItemsCacheValid = false;
|
|
}
|
|
|
|
inline void InsertElementInNamedItemsCache(nsIContent&);
|
|
inline void InvalidateNamedItemsCacheForAttributeChange(int32_t aNameSpaceID,
|
|
nsAtom* aAttribute);
|
|
inline void InvalidateNamedItemsCacheForInsertion(Element&);
|
|
inline void InvalidateNamedItemsCacheForDeletion(Element&);
|
|
|
|
void EnsureNamedItemsCacheValid(bool aDoFlush);
|
|
|
|
/**
|
|
* Returns whether the element matches our criterion
|
|
*
|
|
* @param aElement the element to attempt to match
|
|
* @return whether we match
|
|
*/
|
|
bool Match(Element* aElement);
|
|
/**
|
|
* See if anything in the subtree rooted at aContent, including
|
|
* aContent itself, matches our criterion.
|
|
*
|
|
* @param aContent the root of the subtree to match against
|
|
* @return whether we match something in the tree rooted at aContent
|
|
*/
|
|
bool MatchSelf(nsIContent* aContent);
|
|
|
|
/**
|
|
* Populate our list. Stop once we have at least aNeededLength
|
|
* elements. At the end of PopulateSelf running, either the last
|
|
* node we examined is the last node in our array or we have
|
|
* traversed the whole document (or both).
|
|
*
|
|
* @param aNeededLength the length the list should have when we are
|
|
* done (unless it exhausts the document)
|
|
* @param aExpectedElementsIfDirty is for debugging only to
|
|
* assert that mElements has expected number of entries.
|
|
*/
|
|
virtual void PopulateSelf(uint32_t aNeededLength,
|
|
uint32_t aExpectedElementsIfDirty = 0);
|
|
|
|
/**
|
|
* @param aContainer a content node which must be a descendant of
|
|
* mRootNode
|
|
* @return true if children or descendants of aContainer could match our
|
|
* criterion.
|
|
* false otherwise.
|
|
*/
|
|
bool MayContainRelevantNodes(nsINode* aContainer) {
|
|
return mDeep || aContainer == mRootNode;
|
|
}
|
|
|
|
/**
|
|
* Remove ourselves from the hashtable that caches commonly accessed
|
|
* content lists. Generally done on destruction.
|
|
*/
|
|
void RemoveFromHashtable();
|
|
/**
|
|
* If state is not LIST_UP_TO_DATE, fully populate ourselves with
|
|
* all the nodes we can find.
|
|
*/
|
|
inline void BringSelfUpToDate(bool aDoFlush);
|
|
|
|
/**
|
|
* To be called from non-destructor locations that want to remove from caches.
|
|
* Needed because if subclasses want to have cache behavior they can't just
|
|
* override RemoveFromHashtable(), since we call that in our destructor.
|
|
*/
|
|
void RemoveFromCaches() override { RemoveFromHashtable(); }
|
|
|
|
nsINode* mRootNode; // Weak ref
|
|
int32_t mMatchNameSpaceId;
|
|
RefPtr<nsAtom> mHTMLMatchAtom;
|
|
RefPtr<nsAtom> mXMLMatchAtom;
|
|
|
|
/**
|
|
* Function to use to determine whether a piece of content matches
|
|
* our criterion
|
|
*/
|
|
nsContentListMatchFunc mFunc = nullptr;
|
|
/**
|
|
* Cleanup closure data with this.
|
|
*/
|
|
nsContentListDestroyFunc mDestroyFunc = nullptr;
|
|
/**
|
|
* Closure data to pass to mFunc when we call it
|
|
*/
|
|
void* mData = nullptr;
|
|
|
|
mozilla::UniquePtr<NamedItemsCache> mNamedItemsCache;
|
|
|
|
// The current state of the list.
|
|
State mState;
|
|
|
|
/**
|
|
* True if we are looking for elements named "*"
|
|
*/
|
|
bool mMatchAll : 1;
|
|
/**
|
|
* Whether to actually descend the tree. If this is false, we won't
|
|
* consider grandkids of mRootNode.
|
|
*/
|
|
bool mDeep : 1;
|
|
/**
|
|
* Whether the return value of mFunc could depend on the values of
|
|
* attributes.
|
|
*/
|
|
bool mFuncMayDependOnAttr : 1;
|
|
/**
|
|
* Whether we actually need to flush to get our state correct.
|
|
*/
|
|
bool mFlushesNeeded : 1;
|
|
/**
|
|
* Whether the ownerDocument of our root node at list creation time was an
|
|
* HTML document. Only needed when we're doing a namespace/atom match, not
|
|
* when doing function matching, always false otherwise.
|
|
*/
|
|
bool mIsHTMLDocument : 1;
|
|
/**
|
|
* True mNamedItemsCache is valid. Note mNamedItemsCache might still be null
|
|
* if there's no named items at all.
|
|
*/
|
|
bool mNamedItemsCacheValid : 1;
|
|
/**
|
|
* Whether the list observes mutations to the DOM tree.
|
|
*/
|
|
const bool mIsLiveList : 1;
|
|
|
|
#ifdef DEBUG_CONTENT_LIST
|
|
void AssertInSync();
|
|
#endif
|
|
};
|
|
|
|
/**
|
|
* A class of cacheable content list; cached on the combination of aRootNode +
|
|
* aFunc + aDataString
|
|
*/
|
|
class nsCacheableFuncStringContentList;
|
|
|
|
class MOZ_STACK_CLASS nsFuncStringCacheKey {
|
|
public:
|
|
nsFuncStringCacheKey(nsINode* aRootNode, nsContentListMatchFunc aFunc,
|
|
const nsAString& aString)
|
|
: mRootNode(aRootNode), mFunc(aFunc), mString(aString) {}
|
|
|
|
uint32_t GetHash(void) const {
|
|
uint32_t hash = mozilla::HashString(mString);
|
|
return mozilla::AddToHash(hash, mRootNode, mFunc);
|
|
}
|
|
|
|
private:
|
|
friend class nsCacheableFuncStringContentList;
|
|
|
|
nsINode* const mRootNode;
|
|
const nsContentListMatchFunc mFunc;
|
|
const nsAString& mString;
|
|
};
|
|
|
|
// aDestroyFunc is allowed to be null
|
|
// aDataAllocator must always return a non-null pointer
|
|
class nsCacheableFuncStringContentList : public nsContentList {
|
|
public:
|
|
virtual ~nsCacheableFuncStringContentList();
|
|
|
|
bool Equals(const nsFuncStringCacheKey* aKey) {
|
|
return mRootNode == aKey->mRootNode && mFunc == aKey->mFunc &&
|
|
mString == aKey->mString;
|
|
}
|
|
|
|
enum ContentListType { eNodeList, eHTMLCollection };
|
|
#ifdef DEBUG
|
|
ContentListType mType;
|
|
#endif
|
|
|
|
protected:
|
|
nsCacheableFuncStringContentList(
|
|
nsINode* aRootNode, nsContentListMatchFunc aFunc,
|
|
nsContentListDestroyFunc aDestroyFunc,
|
|
nsFuncStringContentListDataAllocator aDataAllocator,
|
|
const nsAString& aString, mozilla::DebugOnly<ContentListType> aType)
|
|
: nsContentList(aRootNode, aFunc, aDestroyFunc, nullptr),
|
|
#ifdef DEBUG
|
|
mType(aType),
|
|
#endif
|
|
mString(aString) {
|
|
mData = (*aDataAllocator)(aRootNode, &mString);
|
|
MOZ_ASSERT(mData);
|
|
}
|
|
|
|
void RemoveFromCaches() override { RemoveFromFuncStringHashtable(); }
|
|
void RemoveFromFuncStringHashtable();
|
|
|
|
nsString mString;
|
|
};
|
|
|
|
class nsCachableElementsByNameNodeList
|
|
: public nsCacheableFuncStringContentList {
|
|
public:
|
|
nsCachableElementsByNameNodeList(
|
|
nsINode* aRootNode, nsContentListMatchFunc aFunc,
|
|
nsContentListDestroyFunc aDestroyFunc,
|
|
nsFuncStringContentListDataAllocator aDataAllocator,
|
|
const nsAString& aString)
|
|
: nsCacheableFuncStringContentList(aRootNode, aFunc, aDestroyFunc,
|
|
aDataAllocator, aString, eNodeList) {}
|
|
|
|
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
|
|
|
|
JSObject* WrapObject(JSContext* cx,
|
|
JS::Handle<JSObject*> aGivenProto) override;
|
|
|
|
#ifdef DEBUG
|
|
static const ContentListType sType;
|
|
#endif
|
|
};
|
|
|
|
class nsCacheableFuncStringHTMLCollection
|
|
: public nsCacheableFuncStringContentList {
|
|
public:
|
|
nsCacheableFuncStringHTMLCollection(
|
|
nsINode* aRootNode, nsContentListMatchFunc aFunc,
|
|
nsContentListDestroyFunc aDestroyFunc,
|
|
nsFuncStringContentListDataAllocator aDataAllocator,
|
|
const nsAString& aString)
|
|
: nsCacheableFuncStringContentList(aRootNode, aFunc, aDestroyFunc,
|
|
aDataAllocator, aString,
|
|
eHTMLCollection) {}
|
|
|
|
JSObject* WrapObject(JSContext* cx,
|
|
JS::Handle<JSObject*> aGivenProto) override;
|
|
|
|
#ifdef DEBUG
|
|
static const ContentListType sType;
|
|
#endif
|
|
};
|
|
|
|
class nsLabelsNodeList final : public nsContentList {
|
|
public:
|
|
nsLabelsNodeList(nsINode* aRootNode, nsContentListMatchFunc aFunc,
|
|
nsContentListDestroyFunc aDestroyFunc, void* aData)
|
|
: nsContentList(aRootNode, aFunc, aDestroyFunc, aData) {}
|
|
|
|
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
|
|
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
|
|
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
|
|
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
|
|
|
|
JSObject* WrapObject(JSContext* cx,
|
|
JS::Handle<JSObject*> aGivenProto) override;
|
|
|
|
/**
|
|
* Reset root, mutation observer, and clear content list
|
|
* if the root has been changed.
|
|
*
|
|
* @param aRootNode The node under which to limit our search.
|
|
*/
|
|
void MaybeResetRoot(nsINode* aRootNode);
|
|
|
|
private:
|
|
/**
|
|
* Start searching at the last one if we already have nodes, otherwise
|
|
* start searching at the root.
|
|
*
|
|
* @param aNeededLength The list of length should have when we are
|
|
* done (unless it exhausts the document).
|
|
* @param aExpectedElementsIfDirty is for debugging only to
|
|
* assert that mElements has expected number of entries.
|
|
*/
|
|
void PopulateSelf(uint32_t aNeededLength,
|
|
uint32_t aExpectedElementsIfDirty = 0) override;
|
|
};
|
|
#endif // nsContentList_h___
|