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21
22 package org.armedbear.j;
23
24 import gnu.regexp.RE;
25 import gnu.regexp.REException;
26 import gnu.regexp.REMatch;
27 import javax.swing.undo.CompoundEdit  ;
28
29 public final class AlignStrings
30 {
31 public static void alignStrings()
32 {
33 final Editor editor = Editor.currentEditor();
34 InputDialog d =
35 new InputDialog(editor, "Regular Expression:", "Align Strings",
36 null);
37 d.setHistory(new History("alignStrings"));
38 editor.centerDialog(d);
39 d.show();
40 String input = d.getInput();
41 if (input != null)
42 alignStrings(input);
43 }
44
45 public static void alignStrings(String s)
46 {
47 final Editor editor = Editor.currentEditor();
48 if (!editor.checkReadOnly())
49 return;
50 if (editor.getMark() == null)
51 return;
52 final Region region = new Region(editor);
53 if (region.getEndLineNumber() - region.getBeginLineNumber() < 2)
54 return;
55 s = unquote(s);
56 RE re;
57 try {
58 re = new RE(s);
59 }
60 catch (REException e) {
61 MessageDialog.showMessageDialog(editor, e.getMessage(), "Error");
62 return;
63 }
64 final Buffer buffer = editor.getBuffer();
65 try {
66 buffer.lockWrite();
67 }
68 catch (InterruptedException e) {
69 Log.error(e);
70 return;
71 }
72 try {
73 _alignStrings(editor, buffer, region, re);
74 }
75 finally {
76 buffer.unlockWrite();
77 }
78 }
79
80 private static void _alignStrings(Editor editor, Buffer buffer,
81 Region region, RE re)
82 {
83 int maxCol = -1;
84 for (Line line = region.getBeginLine(); line != region.getEndLine();
85 line = line.next()) {
86 String text = line.getText();
87 if (text != null) {
88 REMatch match = re.getMatch(text);
89 if (match != null) {
90 int offset = match.getStartIndex();
91 int col = buffer.getCol(line, offset);
92 if (col > maxCol)
93 maxCol = col;
94 }
95 }
96 }
97 if (maxCol < 0)
98 return;
99 Position savedDot = new Position(editor.getDot());
100 CompoundEdit compoundEdit = buffer.beginCompoundEdit();
101 for (Line line = region.getBeginLine(); line != region.getEndLine();
102 line = line.next()) {
103 String text = line.getText();
104 if (text != null) {
105 REMatch match = re.getMatch(text);
106 if (match != null) {
107 int offset = match.getStartIndex();
108 int col = buffer.getCol(line, offset);
109 if (col < maxCol) {
110 editor.addUndo(SimpleEdit.MOVE);
111 editor.getDot().moveTo(line, offset);
112 editor.addUndo(SimpleEdit.LINE_EDIT);
113 buffer.insertChars(editor.getDot(),
114 Utilities.spaces(maxCol - col));
115 Editor.updateInAllEditors(buffer, line);
116 }
117 }
118 }
119 }
120 editor.getDot().moveTo(savedDot);
121 editor.moveCaretToDotCol();
122 buffer.endCompoundEdit(compoundEdit);
123 }
124
125 private static String unquote(String s)
126 {
127 int length = s.length();
128 if (length >= 2) {
129 char c = s.charAt(0);
130 if (c == '"' || c == '\'') {
131 if (s.charAt(length-1) == c)
132 return s.substring(1, length-1);
133 }
134 }
135 return s;
136 }
137 }
138 |
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