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comparison dwtx/jface/text/DefaultLineTracker.d @ 129:eb30df5ca28b

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Added JFace Text sources
author Frank Benoit <benoit@tionex.de>
date Sat, 23 Aug 2008 19:10:48 +0200
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children c4fb132a086c
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128:8df1d4193877 129:eb30df5ca28b
1 /*******************************************************************************
2 * Copyright (c) 2000, 2008 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module dwtx.jface.text.DefaultLineTracker;
14
15 import dwt.dwthelper.utils;
16
17
18 /**
19 * Standard implementation of {@link dwtx.jface.text.ILineTracker}.
20 * <p>
21 * The line tracker considers the three common line delimiters which are '\n',
22 * '\r', '\r\n'.
23 * <p>
24 * This class is not intended to be subclassed.
25 * </p>
26 * @noextend This class is not intended to be subclassed by clients.
27 */
28 public class DefaultLineTracker : AbstractLineTracker {
29
30 /** The predefined delimiters of this tracker */
31 public final static String[] DELIMITERS= { "\r", "\n", "\r\n" }; //$NON-NLS-3$ //$NON-NLS-1$ //$NON-NLS-2$
32 /** A predefined delimiter information which is always reused as return value */
33 private DelimiterInfo fDelimiterInfo= new DelimiterInfo();
34
35
36 /**
37 * Creates a standard line tracker.
38 */
39 public DefaultLineTracker() {
40 }
41
42 /*
43 * @see dwtx.jface.text.ILineTracker#getLegalLineDelimiters()
44 */
45 public String[] getLegalLineDelimiters() {
46 return TextUtilities.copy(DELIMITERS);
47 }
48
49 /*
50 * @see dwtx.jface.text.AbstractLineTracker#nextDelimiterInfo(java.lang.String, int)
51 */
52 protected DelimiterInfo nextDelimiterInfo(String text, int offset) {
53
54 char ch;
55 int length= text.length();
56 for (int i= offset; i < length; i++) {
57
58 ch= text.charAt(i);
59 if (ch is '\r') {
60
61 if (i + 1 < length) {
62 if (text.charAt(i + 1) is '\n') {
63 fDelimiterInfo.delimiter= DELIMITERS[2];
64 fDelimiterInfo.delimiterIndex= i;
65 fDelimiterInfo.delimiterLength= 2;
66 return fDelimiterInfo;
67 }
68 }
69
70 fDelimiterInfo.delimiter= DELIMITERS[0];
71 fDelimiterInfo.delimiterIndex= i;
72 fDelimiterInfo.delimiterLength= 1;
73 return fDelimiterInfo;
74
75 } else if (ch is '\n') {
76
77 fDelimiterInfo.delimiter= DELIMITERS[1];
78 fDelimiterInfo.delimiterIndex= i;
79 fDelimiterInfo.delimiterLength= 1;
80 return fDelimiterInfo;
81 }
82 }
83
84 return null;
85 }
86 }