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/jEdit/tags/jedit-4-2-pre4/org/gjt/sp/util/SegmentBuffer.java

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Java | 70 lines | 32 code | 8 blank | 30 comment | 4 complexity | 45f66a2c55fbea1be2dd3e4e19ab78cd MD5 | raw file
 1/*
 2 * SegmentBuffer.java - A Segment you can append stuff to
 3 * :tabSize=8:indentSize=8:noTabs=false:
 4 * :folding=explicit:collapseFolds=1:
 5 *
 6 * Copyright (C) 2001 Slava Pestov
 7 *
 8 * This program is free software; you can redistribute it and/or
 9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
21 */
22
23package org.gjt.sp.util;
24
25import javax.swing.text.Segment;
26
27/**
28 * An extended segment that you can append text to.
29 */
30public class SegmentBuffer extends Segment
31{
32	//{{{ SegmentBuffer constructor
33	public SegmentBuffer(int capacity)
34	{
35		ensureCapacity(capacity);
36	} //}}}
37
38	//{{{ append() method
39	public void append(char ch)
40	{
41		ensureCapacity(count + 1);
42		array[offset + count] = ch;
43		count++;
44	} //}}}
45
46	//{{{ append() method
47	public void append(char[] text, int off, int len)
48	{
49		ensureCapacity(count + len);
50		System.arraycopy(text,off,array,count,len);
51		count += len;
52	} //}}}
53
54	//{{{ Private members
55
56	//{{{ ensureCapacity() method
57	private void ensureCapacity(int capacity)
58	{
59		if(array == null)
60			array = new char[capacity];
61		else if(capacity >= array.length)
62		{
63			char[] arrayN = new char[capacity * 2];
64			System.arraycopy(array,0,arrayN,0,count);
65			array = arrayN;
66		}
67	} //}}}
68
69	//}}}
70}