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/jEdit/tags/jedit-4-0-pre3/org/gjt/sp/jedit/buffer/ExplicitFoldHandler.java

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Java | 97 lines | 51 code | 7 blank | 39 comment | 8 complexity | 748915330b770a8bf6cd60e00cb04484 MD5 | raw file
Possible License(s): BSD-3-Clause, AGPL-1.0, Apache-2.0, LGPL-2.0, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, LGPL-2.1, GPL-3.0, MPL-2.0-no-copyleft-exception, IPL-1.0
  1. /*
  2. * ExplicitFoldHandler.java - Explicit fold handler
  3. * :tabSize=8:indentSize=8:noTabs=false:
  4. * :folding=explicit:collapseFolds=1:
  5. *
  6. * Copyright (C) 2001 Slava Pestov
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * 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. package org.gjt.sp.jedit.buffer;
  23. import javax.swing.text.Segment;
  24. import org.gjt.sp.jedit.Buffer;
  25. /**
  26. * A fold handler that folds lines based markers embedded in the text.
  27. * ("{{{"
  28. * and "}}}").
  29. * @author Slava Pestov
  30. * @version $Id: ExplicitFoldHandler.java 3832 2001-10-10 10:07:05Z spestov $
  31. * @since jEdit 4.0pre1
  32. */
  33. public class ExplicitFoldHandler implements FoldHandler
  34. {
  35. //{{{ getFoldLevel() method
  36. /**
  37. * Returns the fold level of the specified line.
  38. * @param buffer The buffer in question
  39. * @param lineIndex The line index
  40. * @param seg A segment the fold handler can use to obtain any
  41. * text from the buffer, if necessary
  42. * @return The fold level of the specified line
  43. * @since jEdit 4.0pre1
  44. */
  45. public int getFoldLevel(Buffer buffer, int lineIndex, Segment seg)
  46. {
  47. if(lineIndex == 0)
  48. return 0;
  49. else
  50. {
  51. int tabSize = buffer.getTabSize();
  52. int foldLevel = buffer.getFoldLevel(lineIndex - 1);
  53. buffer.getLineText(lineIndex - 1,seg);
  54. int offset = seg.offset;
  55. int count = seg.count;
  56. int openingBrackets = 0, closingBrackets = 0;
  57. loop: for(int i = 0; i < count; i++)
  58. {
  59. switch(seg.array[offset + i])
  60. {
  61. case '{':
  62. closingBrackets = 0;
  63. openingBrackets++;
  64. if(openingBrackets == 3)
  65. {
  66. foldLevel += tabSize;
  67. break loop;
  68. }
  69. else
  70. break;
  71. case '}':
  72. openingBrackets = 0;
  73. closingBrackets++;
  74. if(closingBrackets == 3)
  75. {
  76. if(foldLevel >= tabSize)
  77. foldLevel -= tabSize;
  78. break loop;
  79. }
  80. else
  81. break;
  82. default:
  83. closingBrackets = openingBrackets = 0;
  84. break;
  85. }
  86. }
  87. return foldLevel;
  88. }
  89. } //}}}
  90. }