source: other-projects/rsyntax-textarea/devel-packages/jflex-1.4.3/src/JFlex/StdOutWriter.java@ 25584

Last change on this file since 25584 was 25584, checked in by davidb, 12 years ago

Initial cut an a text edit area for GLI that supports color syntax highlighting
File size: 3.6 KB
Line 
1/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
2 * JFlex 1.4.3 *
3 * Copyright (C) 1998-2009 Gerwin Klein <[email protected]> *
4 * All rights reserved. *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License. See the file *
8 * COPYRIGHT for more information. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU General Public License along *
16 * with this program; if not, write to the Free Software Foundation, Inc., *
17 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
18 * *
19 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
20
21package JFlex;
22
23
24import java.io.*;
25import java.awt.TextArea;
26
27
28/**
29 * Convenience class for JFlex stdout, redirects output to a TextArea
30 * if in GUI mode.
31 *
32 * @author Gerwin Klein
33 * @version JFlex 1.4.3, $Revision: 433 $, $Date: 2009-01-31 19:52:34 +1100 (Sat, 31 Jan 2009) $
34 */
35public final class StdOutWriter extends PrintWriter {
36
37 /** text area to write to if in gui mode, gui mode = (text != null) */
38 private TextArea text;
39
40 /**
41 * approximation of the current column in the text area
42 * for auto wrapping at <code>wrap</code> characters
43 **/
44 private int col;
45
46 /** auto wrap lines in gui mode at this value */
47 private final static int wrap = 78;
48
49 /** A StdOutWriter, attached to System.out, no gui mode */
50 public StdOutWriter() {
51 super(System.out,true);
52 }
53
54 /** A StdOutWrite, attached to the specified output stream, no gui mode */
55 public StdOutWriter(OutputStream out) {
56 super(out,true);
57 }
58
59 /**
60 * Set the TextArea to write text to. Will continue
61 * to write to System.out if text is <code>null</code>.
62 *
63 * @param text the TextArea to write to
64 */
65 public void setGUIMode(TextArea text) {
66 this.text = text;
67 }
68
69 /** Write a single character. */
70 public void write(int c) {
71 if (text != null) {
72 text.append(String.valueOf((char) c));
73 if (++col > wrap) println();
74 }
75 else
76 super.write(c);
77 }
78
79 /** Write a portion of an array of characters. */
80 public void write(char buf[], int off, int len) {
81 if (text != null) {
82 text.append(new String(buf,off,len));
83 if ((col+=len) > wrap) println();
84 }
85 else
86 super.write(buf, off, len);
87 }
88
89 /** Write a portion of a string. */
90 public void write(String s, int off, int len) {
91 if (text != null) {
92 text.append(s.substring(off,off+len));
93 if ((col+=len) > wrap) println();
94 }
95 else {
96 super.write(s,off,len);
97 flush();
98 }
99 }
100
101 /**
102 * Begin a new line. Which actual character/s is/are written
103 * depends on the runtime platform.
104 */
105 public void println() {
106 if (text != null) {
107 text.append(Out.NL);
108 col = 0;
109 }
110 else
111 super.println();
112 }
113}
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