01: /*
02: * ExplicitFoldHandler.java - Explicit fold handler
03: * :tabSize=8:indentSize=8:noTabs=false:
04: * :folding=explicit:collapseFolds=1:
05: *
06: * Copyright (C) 2001 Slava Pestov
07: *
08: * This program is free software; you can redistribute it and/or
09: * 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:
23: package org.gjt.sp.jedit.buffer;
24:
25: import javax.swing.text.Segment;
26:
27: /**
28: * A fold handler that folds lines based on markers ("{{{" and "}}}")
29: * embedded in the text.
30: *
31: * @author Slava Pestov
32: * @version $Id: ExplicitFoldHandler.java 5339 2006-01-25 23:12:07Z spestov $
33: * @since jEdit 4.0pre1
34: */
35: public class ExplicitFoldHandler extends FoldHandler {
36: //{{{ ExplicitFoldHandler constructor
37: public ExplicitFoldHandler() {
38: super ("explicit");
39: } //}}}
40:
41: //{{{ getFoldLevel() method
42: /**
43: * Returns the fold level of the specified line.
44: * @param buffer The buffer in question
45: * @param lineIndex The line index
46: * @param seg A segment the fold handler can use to obtain any
47: * text from the buffer, if necessary
48: * @return The fold level of the specified line
49: * @since jEdit 4.0pre1
50: */
51: public int getFoldLevel(JEditBuffer buffer, int lineIndex,
52: Segment seg) {
53: if (lineIndex == 0)
54: return 0;
55: else {
56: int foldLevel = buffer.getFoldLevel(lineIndex - 1);
57:
58: buffer.getLineText(lineIndex - 1, seg);
59:
60: int offset = seg.offset;
61: int count = seg.count;
62:
63: int openingBrackets = 0, closingBrackets = 0;
64: for (int i = 0; i < count; i++) {
65: switch (seg.array[offset + i]) {
66: case '{':
67: closingBrackets = 0;
68: openingBrackets++;
69: if (openingBrackets == 3) {
70: foldLevel++;
71: openingBrackets = 0;
72: }
73: break;
74: case '}':
75: openingBrackets = 0;
76: closingBrackets++;
77: if (closingBrackets == 3) {
78: if (foldLevel > 0)
79: foldLevel--;
80: closingBrackets = 0;
81: }
82: break;
83: default:
84: closingBrackets = openingBrackets = 0;
85: break;
86: }
87: }
88:
89: return foldLevel;
90: }
91: } //}}}
92: }
|