зеркало из https://github.com/mozilla/pjs.git
124 строки
2.6 KiB
Java
124 строки
2.6 KiB
Java
|
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil -*-
|
||
|
*
|
||
|
* The contents of this file are subject to the Mozilla Public License
|
||
|
* Version 1.0 (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 the Grendel mail/news client.
|
||
|
*
|
||
|
* The Initial Developer of the Original Code is Netscape Communications
|
||
|
* Corporation. Portions created by Netscape are Copyright (C) 1997
|
||
|
* Netscape Communications Corporation. All Rights Reserved.
|
||
|
*/
|
||
|
|
||
|
package calypso.util;
|
||
|
|
||
|
import java.text.*;
|
||
|
|
||
|
public final class CharArrayIterator implements CharacterIterator
|
||
|
{
|
||
|
private char[] fText;
|
||
|
private int fStart;
|
||
|
private int fEnd;
|
||
|
private int fPosition;
|
||
|
|
||
|
public CharArrayIterator(char[] aText, int aStartOffset, int aLength)
|
||
|
{
|
||
|
int endOffset = aStartOffset + aLength;
|
||
|
|
||
|
if (aStartOffset < 0 || aLength < 0 ||
|
||
|
(aStartOffset + aLength) > aText.length)
|
||
|
throw new IllegalArgumentException("parameter out of range");
|
||
|
|
||
|
fText = aText;
|
||
|
fStart = aStartOffset;
|
||
|
fEnd = endOffset;
|
||
|
fPosition = 0;
|
||
|
}
|
||
|
|
||
|
public char first()
|
||
|
{
|
||
|
fPosition = fStart;
|
||
|
return fText[fPosition];
|
||
|
}
|
||
|
|
||
|
public char last()
|
||
|
{
|
||
|
fPosition = fEnd - 1;
|
||
|
return fText[fPosition];
|
||
|
}
|
||
|
|
||
|
public char current()
|
||
|
{
|
||
|
if (fPosition < fStart || fPosition >= fEnd)
|
||
|
return CharacterIterator.DONE;
|
||
|
|
||
|
return fText[fPosition];
|
||
|
}
|
||
|
|
||
|
public char next()
|
||
|
{
|
||
|
fPosition += 1;
|
||
|
|
||
|
if (fPosition >= fEnd)
|
||
|
return CharacterIterator.DONE;
|
||
|
|
||
|
return fText[fPosition];
|
||
|
}
|
||
|
|
||
|
public char previous()
|
||
|
{
|
||
|
fPosition -= 1;
|
||
|
|
||
|
if (fPosition < fStart)
|
||
|
return CharacterIterator.DONE;
|
||
|
|
||
|
return fText[fPosition];
|
||
|
}
|
||
|
|
||
|
public char setIndex(int aPosition)
|
||
|
{
|
||
|
if (aPosition < fStart || aPosition >= fEnd)
|
||
|
throw new IllegalArgumentException("aPosition out of range");
|
||
|
|
||
|
fPosition = aPosition;
|
||
|
return fText[fPosition];
|
||
|
}
|
||
|
|
||
|
public int getBeginIndex()
|
||
|
{
|
||
|
return fStart;
|
||
|
}
|
||
|
|
||
|
public int getEndIndex()
|
||
|
{
|
||
|
return fEnd;
|
||
|
}
|
||
|
|
||
|
public int getIndex()
|
||
|
{
|
||
|
return fPosition;
|
||
|
}
|
||
|
|
||
|
public Object clone()
|
||
|
{
|
||
|
try
|
||
|
{
|
||
|
CharArrayIterator other
|
||
|
= (CharArrayIterator) super.clone();
|
||
|
|
||
|
return other;
|
||
|
}
|
||
|
catch (CloneNotSupportedException e)
|
||
|
{
|
||
|
throw new InternalError();
|
||
|
}
|
||
|
}
|
||
|
}
|