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1
11 package org.eclipse.jdt.internal.ui.text.correction;
12
13
14 import org.eclipse.text.edits.ReplaceEdit;
15 import org.eclipse.text.edits.TextEdit;
16
17 import org.eclipse.core.runtime.CoreException;
18 import org.eclipse.core.runtime.IStatus;
19
20 import org.eclipse.jface.text.BadLocationException;
21 import org.eclipse.jface.text.IDocument;
22 import org.eclipse.jface.text.IRegion;
23 import org.eclipse.jface.text.Position;
24
25 import org.eclipse.jdt.core.ICompilationUnit;
26 import org.eclipse.jdt.core.ToolFactory;
27 import org.eclipse.jdt.core.compiler.IScanner;
28 import org.eclipse.jdt.core.compiler.ITerminalSymbols;
29 import org.eclipse.jdt.core.compiler.InvalidInputException;
30
31 import org.eclipse.jdt.ui.text.java.IProblemLocation;
32
33 import org.eclipse.jdt.internal.corext.dom.TokenScanner;
34 import org.eclipse.jdt.internal.ui.JavaPluginImages;
35 import org.eclipse.jdt.internal.ui.JavaUIStatus;
36
37
39 public class TaskMarkerProposal extends CUCorrectionProposal {
40
41 private IProblemLocation fLocation;
42
43 public TaskMarkerProposal(ICompilationUnit cu, IProblemLocation location, int relevance) {
44 super("", cu, relevance, null); fLocation= location;
46
47 setDisplayName(CorrectionMessages.TaskMarkerProposal_description);
48 setImage(JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE));
49 }
50
51
54 protected void addEdits(IDocument document, TextEdit rootEdit) throws CoreException {
55 super.addEdits(document, rootEdit);
56
57 try {
58 Position pos= getUpdatedPosition(document);
59 if (pos != null) {
60 rootEdit.addChild(new ReplaceEdit(pos.getOffset(), pos.getLength(), "")); } else {
62 rootEdit.addChild(new ReplaceEdit(fLocation.getOffset(), fLocation.getLength(), "")); }
64 } catch (BadLocationException e) {
65 throw new CoreException(JavaUIStatus.createError(IStatus.ERROR, e));
66 }
67 }
68
69 private Position getUpdatedPosition(IDocument document) throws BadLocationException {
70 IScanner scanner= ToolFactory.createScanner(true, false, false, false);
71 scanner.setSource(document.get().toCharArray());
72
73 int token= getSurroundingComment(scanner);
74 if (token == ITerminalSymbols.TokenNameEOF) {
75 return null;
76 }
77 int commentStart= scanner.getCurrentTokenStartPosition();
78 int commentEnd= scanner.getCurrentTokenEndPosition() + 1;
79
80 int contentStart= commentStart + 2;
81 int contentEnd= commentEnd;
82 if (token == ITerminalSymbols.TokenNameCOMMENT_JAVADOC) {
83 contentStart= commentStart + 3;
84 contentEnd= commentEnd - 2;
85 } else if (token == ITerminalSymbols.TokenNameCOMMENT_BLOCK) {
86 contentEnd= commentEnd - 2;
87 }
88 if (hasContent(document, contentStart, fLocation.getOffset()) || hasContent(document, contentEnd, fLocation.getOffset() + fLocation.getLength())) {
89 return new Position(fLocation.getOffset(), fLocation.getLength());
90 }
91
92 IRegion startRegion= document.getLineInformationOfOffset(commentStart);
93 int start= startRegion.getOffset();
94 boolean contentAtBegining= hasContent(document, start, commentStart);
95
96 if (contentAtBegining) {
97 start= commentStart;
98 }
99
100 int end;
101 if (token == ITerminalSymbols.TokenNameCOMMENT_LINE) {
102 if (contentAtBegining) {
103 end= startRegion.getOffset() + startRegion.getLength(); } else {
105 end= commentEnd; }
107 } else {
108 int endLine= document.getLineOfOffset(commentEnd - 1);
109 if (endLine + 1 == document.getNumberOfLines() || contentAtBegining) {
110 IRegion endRegion= document.getLineInformation(endLine);
111 end= endRegion.getOffset() + endRegion.getLength();
112 } else {
113 IRegion endRegion= document.getLineInformation(endLine + 1);
114 end= endRegion.getOffset();
115 }
116 }
117 if (hasContent(document, commentEnd, end)) {
118 end= commentEnd;
119 start= commentStart; }
121 return new Position(start, end - start);
122 }
123
124 private int getSurroundingComment(IScanner scanner) {
125 try {
126 int start= fLocation.getOffset();
127 int end= start + fLocation.getLength();
128
129 int token= scanner.getNextToken();
130 while (token != ITerminalSymbols.TokenNameEOF) {
131 if (TokenScanner.isComment(token)) {
132 int currStart= scanner.getCurrentTokenStartPosition();
133 int currEnd= scanner.getCurrentTokenEndPosition() + 1;
134 if (currStart <= start && end <= currEnd) {
135 return token;
136 }
137 }
138 token= scanner.getNextToken();
139 }
140
141 } catch (InvalidInputException e) {
142 }
144 return ITerminalSymbols.TokenNameEOF;
145 }
146
147 private boolean hasContent(IDocument document, int start, int end) throws BadLocationException {
148 for (int i= start; i < end; i++) {
149 char ch= document.getChar(i);
150 if (!Character.isWhitespace(ch)) {
151 return true;
152 }
153 }
154 return false;
155 }
156
157 }
158 |
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