source: other-projects/rsyntax-textarea/src/java/org/fife/ui/rsyntaxtextarea/folding/XmlFoldParser.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: 3.3 KB
Line 
1/*
2 * 10/23/2011
3 *
4 * XmlFoldParser.java - Fold parser for XML.
5 *
6 * This library is distributed under a modified BSD license. See the included
7 * RSyntaxTextArea.License.txt file for details.
8 */
9package org.fife.ui.rsyntaxtextarea.folding;
10
11import java.util.ArrayList;
12import java.util.List;
13import javax.swing.text.BadLocationException;
14
15import org.fife.ui.rsyntaxtextarea.RSyntaxTextArea;
16import org.fife.ui.rsyntaxtextarea.Token;
17
18
19/**
20 * Fold parser for XML. Any tags that span more than one line, as well as
21 * comment regions spanning more than one line, are identified as foldable
22 * regions.
23 *
24 * @author Robert Futrell
25 * @version 1.0
26 */
27public class XmlFoldParser implements FoldParser {
28
29 private static final char[] MARKUP_CLOSING_TAG_START = { '<', '/' };
30 private static final char[] MARKUP_SHORT_TAG_END = { '/', '>' };
31 private static final char[] MLC_END = { '-', '-', '>' };
32
33
34 /**
35 * {@inheritDoc}
36 */
37 public List getFolds(RSyntaxTextArea textArea) {
38
39 List folds = new ArrayList();
40
41 Fold currentFold = null;
42 int lineCount = textArea.getLineCount();
43 boolean inMLC = false;
44 int mlcStart = 0;
45
46 try {
47
48 for (int line=0; line<lineCount; line++) {
49
50 Token t = textArea.getTokenListForLine(line);
51 while (t!=null && t.isPaintable()) {
52
53 if (t.isComment()) {
54
55 // Continuing an MLC from a previous line
56 if (inMLC) {
57 // Found the end of the MLC starting on a previous line...
58 if (t.endsWith(MLC_END)) {
59 int mlcEnd = t.offset + t.textCount - 1;
60 if (currentFold==null) {
61 currentFold = new Fold(FoldType.COMMENT, textArea, mlcStart);
62 currentFold.setEndOffset(mlcEnd);
63 folds.add(currentFold);
64 currentFold = null;
65 }
66 else {
67 currentFold = currentFold.createChild(FoldType.COMMENT, mlcStart);
68 currentFold.setEndOffset(mlcEnd);
69 currentFold = currentFold.getParent();
70 }
71 inMLC = false;
72 mlcStart = 0;
73 }
74 // Otherwise, this MLC is continuing on to yet
75 // another line.
76 }
77
78 else {
79 // If we're an MLC that ends on a later line...
80 if (t.type==Token.COMMENT_MULTILINE && !t.endsWith(MLC_END)) {
81 inMLC = true;
82 mlcStart = t.offset;
83 }
84 }
85
86 }
87
88 else if (t.type==Token.MARKUP_TAG_DELIMITER && t.isSingleChar('<')) {
89 if (currentFold==null) {
90 currentFold = new Fold(FoldType.CODE, textArea, t.offset);
91 folds.add(currentFold);
92 }
93 else {
94 currentFold = currentFold.createChild(FoldType.CODE, t.offset);
95 }
96 }
97
98 else if (t.is(Token.MARKUP_TAG_DELIMITER, MARKUP_SHORT_TAG_END)) {
99 if (currentFold!=null) {
100 Fold parentFold = currentFold.getParent();
101 currentFold.removeFromParent();
102 currentFold = parentFold;
103 }
104 }
105
106 else if (t.is(Token.MARKUP_TAG_DELIMITER, MARKUP_CLOSING_TAG_START)) {
107 if (currentFold!=null) {
108 currentFold.setEndOffset(t.offset);
109 Fold parentFold = currentFold.getParent();
110 // Don't add fold markers for single-line blocks
111 if (currentFold.isOnSingleLine()) {
112 currentFold.removeFromParent();
113 }
114 currentFold = parentFold;
115 }
116 }
117
118 t = t.getNextToken();
119
120 }
121
122 }
123
124 } catch (BadLocationException ble) { // Should never happen
125 ble.printStackTrace();
126 }
127
128 return folds;
129
130 }
131
132
133}
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