|
1
19
20 package org.netbeans.modules.languages.features;
21
22 import java.util.ConcurrentModificationException  ;
23 import java.util.HashMap ;
24 import java.util.Iterator ;
25 import java.util.List ;
26 import java.util.Map ;
27 import java.util.WeakHashMap ;
28 import javax.swing.text.BadLocationException ;
29 import org.netbeans.api.languages.LanguagesManager;
30 import org.netbeans.api.languages.ParseException;
31 import org.netbeans.api.lexer.Token;
32 import org.netbeans.api.lexer.TokenHierarchy;
33 import org.netbeans.api.lexer.TokenSequence;
34 import org.netbeans.editor.BaseDocument;
35 import org.netbeans.editor.BaseDocument;
36 import org.netbeans.editor.ext.ExtSyntaxSupport;
37 import org.netbeans.modules.languages.Feature;
38 import org.netbeans.modules.languages.Language;
39 import org.netbeans.modules.languages.LanguagesManagerImpl;
40 import org.netbeans.modules.languages.lexer.STokenId;
41
42
43
47 public class BraceHighlighting extends ExtSyntaxSupport {
48
49 public BraceHighlighting (BaseDocument doc) {
50 super (doc);
51 }
52
53 public int[] findMatchingBlock (int offset, boolean simpleSearch) throws BadLocationException {
54 try {
55 BaseDocument doc = getDocument ();
56 TokenHierarchy<BaseDocument> tokenHierarchy = TokenHierarchy.<BaseDocument>get (doc);
57 TokenSequence tokens = tokenHierarchy.tokenSequence();
58 tokens.move(offset);
59 tokens.moveNext ();
60 Token<STokenId> token = tokens.token ();
61 String mimeType = (String ) doc.getProperty("mimeType"); Language language = ((LanguagesManagerImpl)LanguagesManager.getDefault()).getLanguage(mimeType);
63 Map <String ,String >[] bracesValue = getBraces (language);
64 if (bracesValue == null) {
65 return super.findMatchingBlock(offset, simpleSearch);
66 }
67
68 CharSequence text = token.text().toString();
69 boolean moveToRight = false;
70 String bracket = bracesValue [0].get (text);
71 if (bracket != null) {
72 moveToRight = true;
73 } else {
74 bracket = bracesValue [1].get (text);
75 if (bracket == null) {
76 return null;
77 }
78 }
79 String focusedBracket = text.toString();
80 int focusedBracketLength = focusedBracket.length();
81 int length = bracket.length();
82 int depth = 1;
83 while (moveToRight ? tokens.moveNext() : tokens.movePrevious()) {
84 token = tokens.token();
85 text = token.text();
86 if (text.length() == length && bracket.equals(text.toString())) {
87 depth--;
88 if (depth == 0) {
89 int position = token.offset(tokenHierarchy);
90 return new int[] {position, position + token.length()};
91 }
92 } else if (text.length() == focusedBracketLength && focusedBracket.equals(text.toString())) {
93 depth++;
94 }
95 }
96 } catch (ConcurrentModificationException e) {
97 } catch (ParseException e) {
98 }
99 return null;
100 }
101
102 private static Map <Language,Map <String ,String >[]> braces = new WeakHashMap <Language,Map <String ,String >[]> ();
103
104 private static Map <String ,String >[] getBraces (Language l) {
105 if (!braces.containsKey (l)) {
106 Map <String ,String > startToEnd = new HashMap <String ,String > ();
107 Map <String ,String > endToStart = new HashMap <String ,String > ();
108
109 List <Feature> indents = l.getFeatures ("BRACE");
110 Iterator <Feature> it = indents.iterator ();
111 while (it.hasNext ()) {
112 Feature indent = it.next ();
113 String s = (String ) indent.getValue ();
114 int i = s.indexOf (':');
115 String start = s.substring (0, i);
116 String end = s.substring (i + 1);
117 startToEnd.put (start, end);
118 endToStart.put (end, start);
119 }
120 braces.put (
121 l,
122 new Map [] {startToEnd, endToStart}
123 );
124 }
125 return braces.get (l);
126 }
127 }
128
129 |
Popular Tags |
Java API By Example, From Geeks To Geeks.