01: /*BEGIN_COPYRIGHT_BLOCK
02: *
03: * Copyright (c) 2001-2007, JavaPLT group at Rice University (javaplt@rice.edu)
04: * All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions are met:
08: * * Redistributions of source code must retain the above copyright
09: * notice, this list of conditions and the following disclaimer.
10: * * Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * * Neither the names of DrJava, the JavaPLT group, Rice University, nor the
14: * names of its contributors may be used to endorse or promote products
15: * derived from this software without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
21: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28: *
29: * This software is Open Source Initiative approved Open Source Software.
30: * Open Source Initative Approved is a trademark of the Open Source Initiative.
31: *
32: * This file is part of DrJava. Download the current version of this project
33: * from http://www.drjava.org/ or http://sourceforge.net/projects/drjava/
34: *
35: * END_COPYRIGHT_BLOCK*/
36:
37: package edu.rice.cs.drjava.model.definitions.indent;
38:
39: import javax.swing.text.*;
40: import edu.rice.cs.util.UnexpectedException;
41:
42: import edu.rice.cs.drjava.model.AbstractDJDocument;
43:
44: /** Question rule in the indentation decision tree. Determines if the current line starts with the specified
45: * string.
46: * @version $Id: QuestionCurrLineStartsWith.java 4255 2007-08-28 19:17:37Z mgricken $
47: */
48: public class QuestionCurrLineStartsWith extends IndentRuleQuestion {
49: private String _prefix;
50:
51: /** Constructs a new rule for the given prefix string. Does not look inside comments.
52: * @param prefix String to search for
53: * @param yesRule Rule to use if this rule holds
54: * @param noRule Rule to use if this rule does not hold
55: */
56: public QuestionCurrLineStartsWith(String prefix,
57: IndentRule yesRule, IndentRule noRule) {
58: super (yesRule, noRule);
59: _prefix = prefix;
60: }
61:
62: /** Determines if the current line in the document starts with the specified prefix, ignoring whitespace.
63: * @param doc AbstractDJDocument containing the line to be indented.
64: * @param reason The reason that the indentation is being done
65: * @return true if this node's rule holds.
66: */
67: boolean applyRule(AbstractDJDocument doc,
68: Indenter.IndentReason reason) {
69:
70: try {
71: // Find start of line
72: int here = doc.getCurrentLocation();
73: int firstCharPos = doc.getLineFirstCharPos(here);
74: int lineEndPos = doc.getLineEndPos(here);
75:
76: // If prefix would run off the end of the line, the answer is obvious.
77: if (firstCharPos + _prefix.length() > lineEndPos) {
78: return false;
79: }
80:
81: // Compare prefix
82: String actualPrefix = doc.getText(firstCharPos, _prefix
83: .length());
84: return _prefix.equals(actualPrefix);
85: } catch (BadLocationException e) {
86: // Shouldn't happen
87: throw new UnexpectedException(e);
88: }
89: }
90: }
|