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Java > Open Source Codes > edu > rice > cs > drjava > model > definitions > indent > QuestionStartAfterOpenBrace


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33
34 package edu.rice.cs.drjava.model.definitions.indent;
35
36 import javax.swing.text.BadLocationException JavaDoc;
37 import edu.rice.cs.drjava.model.AbstractDJDocument;
38 import edu.rice.cs.drjava.model.definitions.reducedmodel.*;
39 import edu.rice.cs.util.UnexpectedException;
40
41 /** Determines whether or not the closest non-whitespace character previous to the start of the current line (excluding
42   * any characters inside comments or strings) is an open brace.
43   *
44   * @version $Id: QuestionStartAfterOpenBrace.java 3900 2006-06-29 13:16:38Z rcartwright $
45   */
46 public class QuestionStartAfterOpenBrace extends IndentRuleQuestion {
47   /** @param yesRule The decision subtree for the case that this rule applies in the current context.
48     * @param noRule The decision subtree for the case that this rule does not apply in the current context.
49     */
50   public QuestionStartAfterOpenBrace(IndentRule yesRule, IndentRule noRule) { super(yesRule, noRule); }
51   
52   /** @param doc The AbstractDJDocument containing the current line.
53     * @return True the closest non-whitespace character before the start of the current line (excluding any
54     * characters inside comments or strings) is an open brace.
55     */
56   boolean applyRule(AbstractDJDocument doc, int reason) {
57     
58     int origin = doc.getCurrentLocation();
59     //int origin = doc.getReduced().absOffset();
60 int lineStart = doc.getLineStartPos(doc.getCurrentLocation());
61     
62     // Get brace for start of line
63 doc.move(lineStart - origin);
64     IndentInfo info = doc.getIndentInformation();
65     doc.move(origin - lineStart);
66     
67     if ((!info.braceType.equals(IndentInfo.openSquiggly)) ||
68         (info.distToBrace < 0))
69       // Precondition not met: we should have a brace
70 return false;
71     int bracePos = lineStart - info.distToBrace;
72     
73     // Get brace's end of line
74 int braceEndLinePos = doc.getLineEndPos(bracePos);
75     
76     // Get position of next non-WS char (not in comments)
77 int nextNonWS = -1;
78     try { nextNonWS = doc.getFirstNonWSCharPos(braceEndLinePos); }
79     catch (BadLocationException JavaDoc e) {
80       // This shouldn't happen
81 throw new UnexpectedException(e);
82     }
83     
84     if (nextNonWS == AbstractDJDocument.ERROR_INDEX) return true;
85     
86     return (nextNonWS >= lineStart);
87   }
88 }
89
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