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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is String Enumerator.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corp.
- * Portions created by the Initial Developer are Copyright (C) 2003
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * Alec Flett <alecf@netscape.com>
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- #include "nsIStringEnumerator.h"
- #include "nsVoidArray.h"
-
- // nsIStringEnumerator/nsIUTF8StringEnumerator implementations
- //
- // Currently all implementations support both interfaces. The
- // constructors below provide the most common interface for the given
- // type (i.e. nsIStringEnumerator for PRUnichar* strings, and so
- // forth) but any resulting enumerators can be queried to the other
- // type. Internally, the enumerators will hold onto the type that was
- // passed in and do conversion if GetNext() for the other type of
- // string is called.
-
- // There are a few different types of enumerators:
-
- //
- // These enumerators hold a pointer to the array. Be careful
- // because modifying the array may confuse the iterator, especially if
- // you insert or remove elements in the middle of the array.
- //
-
- // The non-adopting enumerator requires that the array sticks around
- // at least as long as the enumerator does. These are for constant
- // string arrays that the enumerator does not own, this could be used
- // in VERY specialized cases such as when the provider KNOWS that the
- // string enumerator will be consumed immediately, or will at least
- // outlast the array.
- // For example:
- //
- // nsCStringArray array;
- // array.AppendCString("abc");
- // array.AppendCString("def");
- // NS_NewStringEnumerator(&enumerator, &array, PR_TRUE);
- //
- // // call some internal method which iterates the enumerator
- // InternalMethod(enumerator);
- // NS_RELEASE(enumerator);
- //
- NS_COM nsresult
- NS_NewUTF8StringEnumerator(nsIUTF8StringEnumerator** aResult,
- const nsCStringArray* aArray);
-
- NS_COM nsresult
- NS_NewStringEnumerator(nsIStringEnumerator** aResult,
- const nsStringArray* aArray);
-
- // Adopting string enumerators assume ownership of the array and will
- // call |operator delete| on the array when the enumerator is destroyed
- // this is useful when the provider creates an array soley for the
- // purpose of creating the enumerator.
- // For example:
- //
- // nsCStringArray* array = new nsCStringArray;
- // array->AppendString("abcd");
- // NS_NewAdoptingStringEnumerator(&result, array);
- NS_COM nsresult
- NS_NewAdoptingStringEnumerator(nsIStringEnumerator** aResult,
- nsStringArray* aArray);
-
- NS_COM nsresult
- NS_NewAdoptingUTF8StringEnumerator(nsIUTF8StringEnumerator** aResult,
- nsCStringArray* aArray);
-
-
- // these versions take a refcounted "owner" which will be addreffed
- // when the enumerator is created, and destroyed when the enumerator
- // is released. This allows providers to give non-owning pointers to
- // ns*StringArray member variables without worrying about lifetime
- // issues
- // For example:
- //
- // nsresult MyClass::Enumerate(nsIUTF8StringEnumerator** aResult) {
- // mCategoryList->AppendString("abcd");
- // return NS_NewStringEnumerator(aResult, mCategoryList, this);
- // }
- //
- NS_COM nsresult
- NS_NewStringEnumerator(nsIStringEnumerator** aResult,
- const nsStringArray* aArray,
- nsISupports* aOwner);
- NS_COM nsresult
- NS_NewUTF8StringEnumerator(nsIUTF8StringEnumerator** aResult,
- const nsCStringArray* aArray,
- nsISupports* aOwner);
-