gecko-dev/dom/html/HTMLPropertiesCollection.h

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6.3 KiB
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set tw=80 expandtab softtabstop=2 ts=2 sw=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/. */
#ifndef HTMLPropertiesCollection_h_
#define HTMLPropertiesCollection_h_
#include "mozilla/Attributes.h"
#include "mozilla/dom/DOMStringList.h"
#include "nsCycleCollectionParticipant.h"
#include "nsAutoPtr.h"
#include "nsCOMArray.h"
#include "nsIMutationObserver.h"
#include "nsStubMutationObserver.h"
#include "nsBaseHashtable.h"
#include "nsINodeList.h"
#include "nsIHTMLCollection.h"
#include "nsHashKeys.h"
#include "nsRefPtrHashtable.h"
#include "nsGenericHTMLElement.h"
class nsIDocument;
class nsINode;
namespace mozilla {
namespace dom {
class HTMLPropertiesCollection;
class PropertyNodeList;
class Element;
class PropertyStringList : public DOMStringList
{
public:
explicit PropertyStringList(HTMLPropertiesCollection* aCollection);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(PropertyStringList, DOMStringList)
bool ContainsInternal(const nsAString& aString);
protected:
virtual ~PropertyStringList();
virtual void EnsureFresh() override;
nsRefPtr<HTMLPropertiesCollection> mCollection;
};
class HTMLPropertiesCollection final : public nsIHTMLCollection,
public nsStubMutationObserver,
public nsWrapperCache
{
friend class PropertyNodeList;
friend class PropertyStringList;
public:
explicit HTMLPropertiesCollection(nsGenericHTMLElement* aRoot);
// nsWrapperCache
using nsWrapperCache::GetWrapperPreserveColor;
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
protected:
virtual ~HTMLPropertiesCollection();
virtual JSObject* GetWrapperPreserveColorInternal() override
{
return nsWrapperCache::GetWrapperPreserveColor();
}
public:
virtual Element* GetElementAt(uint32_t aIndex) override;
void SetDocument(nsIDocument* aDocument);
nsINode* GetParentObject() override;
virtual Element*
GetFirstNamedElement(const nsAString& aName, bool& aFound) override
{
// HTMLPropertiesCollection.namedItem and the named getter call the
// NamedItem that returns a PropertyNodeList, calling
// HTMLCollection.namedItem doesn't make sense so this returns null.
aFound = false;
return nullptr;
}
PropertyNodeList* NamedItem(const nsAString& aName);
PropertyNodeList* NamedGetter(const nsAString& aName, bool& aFound)
{
aFound = IsSupportedNamedProperty(aName);
return aFound ? NamedItem(aName) : nullptr;
}
bool NameIsEnumerable(const nsAString& aName)
{
return true;
}
DOMStringList* Names()
{
EnsureFresh();
return mNames;
}
virtual void GetSupportedNames(unsigned,
nsTArray<nsString>& aNames) override;
NS_DECL_NSIDOMHTMLCOLLECTION
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(HTMLPropertiesCollection,
nsIHTMLCollection)
protected:
// Make sure this collection is up to date, in case the DOM has been mutated.
void EnsureFresh();
// Crawl the properties of mRoot, following any itemRefs it may have
void CrawlProperties();
// Crawl startNode and its descendants, looking for items
void CrawlSubtree(Element* startNode);
bool IsSupportedNamedProperty(const nsAString& aName)
{
EnsureFresh();
return mNames->ContainsInternal(aName);
}
// the items that make up this collection
nsTArray<nsRefPtr<nsGenericHTMLElement> > mProperties;
// the itemprop attribute of the properties
nsRefPtr<PropertyStringList> mNames;
// The cached PropertyNodeLists that are NamedItems of this collection
nsRefPtrHashtable<nsStringHashKey, PropertyNodeList> mNamedItemEntries;
// The element this collection is rooted at
nsRefPtr<nsGenericHTMLElement> mRoot;
// The document mRoot is in, if any
nsCOMPtr<nsIDocument> mDoc;
// True if there have been DOM modifications since the last EnsureFresh call.
bool mIsDirty;
};
class PropertyNodeList final : public nsINodeList,
public nsStubMutationObserver
{
public:
PropertyNodeList(HTMLPropertiesCollection* aCollection,
nsIContent* aRoot, const nsAString& aName);
virtual JSObject* WrapObject(JSContext *cx, JS::Handle<JSObject*> aGivenProto) override;
void SetDocument(nsIDocument* aDocument);
void GetValues(JSContext* aCx, nsTArray<JS::Value >& aResult,
ErrorResult& aError);
virtual nsIContent* Item(uint32_t aIndex) override;
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(PropertyNodeList,
nsINodeList)
NS_DECL_NSIDOMNODELIST
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
// nsINodeList interface
virtual int32_t IndexOf(nsIContent* aContent) override;
virtual nsINode* GetParentObject() override;
void AppendElement(nsGenericHTMLElement* aElement)
{
mElements.AppendElement(aElement);
}
void Clear()
{
mElements.Clear();
}
void SetDirty() { mIsDirty = true; }
protected:
virtual ~PropertyNodeList();
// Make sure this list is up to date, in case the DOM has been mutated.
void EnsureFresh();
// the the name that this list corresponds to
nsString mName;
// the document mParent is in, if any
nsCOMPtr<nsIDocument> mDoc;
// the collection that this list is a named item of
nsRefPtr<HTMLPropertiesCollection> mCollection;
// the node this list is rooted at
nsCOMPtr<nsINode> mParent;
// the properties that make up this list
nsTArray<nsRefPtr<nsGenericHTMLElement> > mElements;
// True if there have been DOM modifications since the last EnsureFresh call.
bool mIsDirty;
};
} // namespace dom
} // namespace mozilla
#endif // HTMLPropertiesCollection_h_