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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef HTMLCollection_h
#define HTMLCollection_h
#include <wtf/RefCounted.h>
#include <wtf/Forward.h>
#include <wtf/HashMap.h>
#include <wtf/Vector.h>
namespace WebCore {
class AtomicString;
class AtomicStringImpl;
class Element;
class Node;
class NodeList;
class String;
class HTMLCollection : public RefCounted<HTMLCollection> {
public:
enum Type {
// unnamed collection types cached in the document
DocImages, // all <img> elements in the document
DocApplets, // all <object> and <applet> elements
DocEmbeds, // all <embed> elements
DocObjects, // all <object> elements
DocForms, // all <form> elements
DocLinks, // all <a> _and_ <area> elements with a value for href
DocAnchors, // all <a> elements with a value for name
DocScripts, // all <script> elements
DocAll, // "all" elements (IE)
NodeChildren, // first-level children (IE)
// named collection types cached in the document
WindowNamedItems,
DocumentNamedItems,
// types not cached in the document; these are types that can't be used on a document
TableTBodies, // all <tbody> elements in this table
TSectionRows, // all row elements in this table section
TRCells, // all cells in this row
SelectOptions,
MapAreas,
Other
};
static const Type FirstUnnamedDocumentCachedType = DocImages;
static const unsigned NumUnnamedDocumentCachedTypes = NodeChildren - DocImages + 1;
static const Type FirstNamedDocumentCachedType = WindowNamedItems;
static const unsigned NumNamedDocumentCachedTypes = DocumentNamedItems - WindowNamedItems + 1;
HTMLCollection(PassRefPtr<Node> base, Type);
virtual ~HTMLCollection();
unsigned length() const;
virtual Node* item(unsigned index) const;
virtual Node* nextItem() const;
virtual Node* namedItem(const String& name, bool caseSensitive = true) const;
virtual Node* nextNamedItem(const String& name) const; // In case of multiple items named the same way
Node* firstItem() const;
void namedItems(const AtomicString& name, Vector<RefPtr<Node> >&) const;
PassRefPtr<NodeList> tags(const String&);
Node* base() const { return m_base.get(); }
Type type() const { return m_type; }
// FIXME: This class name is a bad in two ways. First, "info" is much too vague,
// and doesn't convey the job of this class (caching collection state).
// Second, since this is a member of HTMLCollection, it doesn't need "collection"
// in its name.
struct CollectionInfo {
CollectionInfo();
CollectionInfo(const CollectionInfo&);
CollectionInfo& operator=(const CollectionInfo& other)
{
CollectionInfo tmp(other);
swap(tmp);
return *this;
}
~CollectionInfo();
void reset();
void swap(CollectionInfo&);
typedef HashMap<AtomicStringImpl*, Vector<Element*>*> NodeCacheMap;
unsigned version;
Element* current;
unsigned position;
unsigned length;
int elementsArrayPosition;
NodeCacheMap idCache;
NodeCacheMap nameCache;
bool hasLength;
bool hasNameCache;
private:
static void copyCacheMap(NodeCacheMap&, const NodeCacheMap&);
};
protected:
HTMLCollection(PassRefPtr<Node> base, Type, CollectionInfo*);
CollectionInfo* info() const { return m_info; }
virtual void resetCollectionInfo() const;
mutable bool m_idsDone; // for nextNamedItem()
private:
virtual Element* itemAfter(Element*) const;
virtual unsigned calcLength() const;
virtual void updateNameCache() const;
bool checkForNameMatch(Element*, bool checkName, const String &name, bool caseSensitive) const;
RefPtr<Node> m_base;
Type m_type;
mutable CollectionInfo* m_info;
mutable bool m_ownsInfo;
};
} // namespace
#endif
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