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Java > Open Source Codes > org > eclipse > jdt > internal > ui > text > java > JavaNoTypeCompletionProposalComputer


1 /*******************************************************************************
2  * Copyright (c) 2005, 2006 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/

11 package org.eclipse.jdt.internal.ui.text.java;
12
13 import org.eclipse.jface.text.IDocument;
14
15 import org.eclipse.jdt.core.CompletionProposal;
16
17 import org.eclipse.jdt.ui.text.java.CompletionProposalCollector;
18 import org.eclipse.jdt.ui.text.java.ContentAssistInvocationContext;
19 import org.eclipse.jdt.ui.text.java.JavaContentAssistInvocationContext;
20
21 import org.eclipse.jdt.internal.ui.text.JavaHeuristicScanner;
22 import org.eclipse.jdt.internal.ui.text.Symbols;
23
24 /**
25  *
26  * @since 3.2
27  */

28 public class JavaNoTypeCompletionProposalComputer extends JavaCompletionProposalComputer {
29     /*
30      * @see org.eclipse.jdt.internal.ui.text.java.JavaCompletionProposalComputer#createCollector(org.eclipse.jdt.ui.text.java.JavaContentAssistInvocationContext)
31      */

32     protected CompletionProposalCollector createCollector(JavaContentAssistInvocationContext context) {
33         CompletionProposalCollector collector= super.createCollector(context);
34         collector.setIgnored(CompletionProposal.ANNOTATION_ATTRIBUTE_REF, false);
35         collector.setIgnored(CompletionProposal.ANONYMOUS_CLASS_DECLARATION, false);
36         collector.setIgnored(CompletionProposal.FIELD_REF, false);
37         collector.setIgnored(CompletionProposal.KEYWORD, false);
38         collector.setIgnored(CompletionProposal.LABEL_REF, false);
39         collector.setIgnored(CompletionProposal.LOCAL_VARIABLE_REF, false);
40         collector.setIgnored(CompletionProposal.METHOD_DECLARATION, false);
41         collector.setIgnored(CompletionProposal.METHOD_NAME_REFERENCE, false);
42         collector.setIgnored(CompletionProposal.METHOD_REF, false);
43         collector.setIgnored(CompletionProposal.PACKAGE_REF, false);
44         collector.setIgnored(CompletionProposal.POTENTIAL_METHOD_DECLARATION, false);
45         collector.setIgnored(CompletionProposal.VARIABLE_DECLARATION, false);
46         
47         collector.setIgnored(CompletionProposal.JAVADOC_BLOCK_TAG, true);
48         collector.setIgnored(CompletionProposal.JAVADOC_FIELD_REF, true);
49         collector.setIgnored(CompletionProposal.JAVADOC_INLINE_TAG, true);
50         collector.setIgnored(CompletionProposal.JAVADOC_METHOD_REF, true);
51         collector.setIgnored(CompletionProposal.JAVADOC_PARAM_REF, true);
52         collector.setIgnored(CompletionProposal.JAVADOC_TYPE_REF, true);
53         collector.setIgnored(CompletionProposal.JAVADOC_VALUE_REF, true);
54         
55         collector.setIgnored(CompletionProposal.TYPE_REF, true);
56         return collector;
57     }
58     
59     protected int guessContextInformationPosition(ContentAssistInvocationContext context) {
60         final int contextPosition= context.getInvocationOffset();
61         
62         IDocument document= context.getDocument();
63         JavaHeuristicScanner scanner= new JavaHeuristicScanner(document);
64         int bound= Math.max(-1, contextPosition - 200);
65         
66         // try the innermost scope of parentheses that looks like a method call
67
int pos= contextPosition - 1;
68         do {
69             int paren= scanner.findOpeningPeer(pos, bound, '(', ')');
70             if (paren == JavaHeuristicScanner.NOT_FOUND)
71                 break;
72             int token= scanner.previousToken(paren - 1, bound);
73             // next token must be a method name (identifier) or the closing angle of a
74
// constructor call of a parameterized type.
75
if (token == Symbols.TokenIDENT || token == Symbols.TokenGREATERTHAN)
76                 return paren + 1;
77             pos= paren - 1;
78         } while (true);
79         
80         return super.guessContextInformationPosition(context);
81     }
82 }
83
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