154 lines
4.8 KiB
C++
154 lines
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK *****
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*
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*
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* This Original Code has been modified by IBM Corporation.
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* Modifications made by IBM described herein are
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* Copyright (c) International Business Machines
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* Corporation, 2000
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*
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* Modifications to Mozilla code or documentation
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* identified per MPL Section 3.3
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*
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* Date Modified by Description of modification
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* 03/27/2000 IBM Corp. Added PR_CALLBACK for Optlink
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* use in OS2
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*/
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/*
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Maintains one-to-many mapping between element IDs and content
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nodes.
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*/
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#ifndef nsElementMap_h__
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#define nsElementMap_h__
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#include "nscore.h"
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#include "nsError.h"
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#include "plhash.h"
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#include "nsIContent.h"
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#include "nsFixedSizeAllocator.h"
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class nsString;
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class nsISupportsArray;
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class nsElementMap
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{
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protected:
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PLHashTable* mMap;
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nsFixedSizeAllocator mPool;
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static PLHashAllocOps gAllocOps;
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class ContentListItem {
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public:
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ContentListItem* mNext;
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nsCOMPtr<nsIContent> mContent;
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static ContentListItem*
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Create(nsFixedSizeAllocator& aPool, nsIContent* aContent) {
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void* bytes = aPool.Alloc(sizeof(ContentListItem));
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return bytes ? new (bytes) ContentListItem(aContent) : nsnull; }
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static void
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Destroy(nsFixedSizeAllocator& aPool, ContentListItem* aItem) {
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delete aItem;
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aPool.Free(aItem, sizeof(*aItem)); }
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protected:
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static void* operator new(size_t aSize, void* aPtr) CPP_THROW_NEW {
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return aPtr; }
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static void operator delete(void* aPtr, size_t aSize) {
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/* do nothing; memory free()'d in Destroy() */ }
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ContentListItem(nsIContent* aContent) : mNext(nsnull), mContent(aContent) {
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MOZ_COUNT_CTOR(nsElementMap::ContentListItem); }
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~ContentListItem() {
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MOZ_COUNT_DTOR(nsElementMap::ContentListItem); }
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};
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static PLHashNumber PR_CALLBACK
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Hash(const void* akey);
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static PRIntn PR_CALLBACK
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Compare(const void* aLeft, const void* aRight);
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static PRIntn PR_CALLBACK
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ReleaseContentList(PLHashEntry* aHashEntry, PRIntn aIndex, void* aClosure);
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public:
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nsElementMap(void);
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virtual ~nsElementMap();
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nsresult
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Add(const nsAString& aID, nsIContent* aContent);
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nsresult
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Remove(const nsAString& aID, nsIContent* aContent);
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nsresult
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Find(const nsAString& aID, nsISupportsArray* aResults);
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nsresult
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FindFirst(const nsAString& aID, nsIContent** aContent);
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typedef PRIntn (*nsElementMapEnumerator)(const PRUnichar* aID,
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nsIContent* aElement,
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void* aClosure);
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nsresult
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Enumerate(nsElementMapEnumerator aEnumerator, void* aClosure);
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private:
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struct EnumerateClosure {
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nsElementMap* mSelf;
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nsElementMapEnumerator mEnumerator;
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void* mClosure;
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};
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static PRIntn PR_CALLBACK
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EnumerateImpl(PLHashEntry* aHashEntry, PRIntn aIndex, void* aClosure);
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};
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#endif // nsElementMap_h__
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