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comparison dwtx/jface/text/ConfigurableLineTracker.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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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.ConfigurableLineTracker;
14
15 import dwt.dwthelper.utils;
16
17 import dwtx.core.runtime.Assert;
18
19
20 /**
21 * Standard implementation of a generic
22 * {@link dwtx.jface.text.ILineTracker}.
23 * <p>
24 * The line tracker can be configured with the set of legal line delimiters.
25 * Line delimiters are unconstrained. The line delimiters are used to compute
26 * the tracker's line structure. In the case of overlapping line delimiters, the
27 * longest line delimiter is given precedence of the shorter ones.
28 * <p>
29 * This class is not intended to be subclassed.
30 * </p>
31 * @noextend This class is not intended to be subclassed by clients.
32 */
33 public class ConfigurableLineTracker : AbstractLineTracker {
34
35
36 /** The strings which are considered being the line delimiter */
37 private String[] fDelimiters;
38 /** A predefined delimiter information which is always reused as return value */
39 private DelimiterInfo fDelimiterInfo= new DelimiterInfo();
40
41
42 /**
43 * Creates a standard line tracker for the given line delimiters.
44 *
45 * @param legalLineDelimiters the tracker's legal line delimiters,
46 * may not be <code>null</code> and must be longer than 0
47 */
48 public ConfigurableLineTracker(String[] legalLineDelimiters) {
49 Assert.isTrue(legalLineDelimiters !is null && legalLineDelimiters.length > 0);
50 fDelimiters= TextUtilities.copy(legalLineDelimiters);
51 }
52
53 /*
54 * @see dwtx.jface.text.ILineTracker#getLegalLineDelimiters()
55 */
56 public String[] getLegalLineDelimiters() {
57 return TextUtilities.copy(fDelimiters);
58 }
59
60 /*
61 * @see dwtx.jface.text.AbstractLineTracker#nextDelimiterInfo(java.lang.String, int)
62 */
63 protected DelimiterInfo nextDelimiterInfo(String text, int offset) {
64 if (fDelimiters.length > 1) {
65 int[] info= TextUtilities.indexOf(fDelimiters, text, offset);
66 if (info[0] is -1)
67 return null;
68 fDelimiterInfo.delimiterIndex= info[0];
69 fDelimiterInfo.delimiter= fDelimiters[info[1]];
70 } else {
71 int index= text.indexOf(fDelimiters[0], offset);
72 if (index is -1)
73 return null;
74 fDelimiterInfo.delimiterIndex= index;
75 fDelimiterInfo.delimiter= fDelimiters[0];
76 }
77
78 fDelimiterInfo.delimiterLength= fDelimiterInfo.delimiter.length();
79 return fDelimiterInfo;
80 }
81 }