KickJava   Java API By Example, From Geeks To Geeks.

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


1 /*******************************************************************************
2  * Copyright (c) 2000, 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.text.edits.TextEdit;
14
15 import org.eclipse.core.runtime.CoreException;
16 import org.eclipse.core.runtime.NullProgressMonitor;
17
18 import org.eclipse.swt.graphics.Image;
19
20 import org.eclipse.jface.preference.IPreferenceStore;
21
22 import org.eclipse.jface.text.BadLocationException;
23 import org.eclipse.jface.text.IDocument;
24
25 import org.eclipse.jdt.core.ICompilationUnit;
26 import org.eclipse.jdt.core.IType;
27 import org.eclipse.jdt.core.Signature;
28 import org.eclipse.jdt.core.dom.rewrite.ImportRewrite;
29
30 import org.eclipse.jdt.internal.corext.codemanipulation.StubUtility;
31
32 import org.eclipse.jdt.ui.PreferenceConstants;
33
34 import org.eclipse.jdt.internal.ui.JavaPlugin;
35
36 /**
37  * If passed compilation unit is not null, the replacement string will be seen as a qualified type name.
38   */

39 public class JavaTypeCompletionProposal extends JavaCompletionProposal {
40
41     protected final ICompilationUnit fCompilationUnit;
42
43     /** The unqualified type name. */
44     private final String JavaDoc fUnqualifiedTypeName;
45     /** The fully qualified type name. */
46     private final String JavaDoc fFullyQualifiedTypeName;
47
48     public JavaTypeCompletionProposal(String JavaDoc replacementString, ICompilationUnit cu, int replacementOffset, int replacementLength, Image image, String JavaDoc displayString, int relevance) {
49         this(replacementString, cu, replacementOffset, replacementLength, image, displayString, relevance, null);
50     }
51
52     public JavaTypeCompletionProposal(String JavaDoc replacementString, ICompilationUnit cu, int replacementOffset, int replacementLength, Image image, String JavaDoc displayString, int relevance,
53         String JavaDoc fullyQualifiedTypeName)
54     {
55         super(replacementString, replacementOffset, replacementLength, image, displayString, relevance);
56         fCompilationUnit= cu;
57         fFullyQualifiedTypeName= fullyQualifiedTypeName;
58         fUnqualifiedTypeName= fullyQualifiedTypeName != null ? Signature.getSimpleName(fullyQualifiedTypeName) : null;
59     }
60
61     protected boolean updateReplacementString(IDocument document, char trigger, int offset, ImportRewrite impRewrite) throws CoreException, BadLocationException {
62         // avoid adding imports when inside imports container
63
if (impRewrite != null && fFullyQualifiedTypeName != null) {
64             String JavaDoc replacementString= getReplacementString();
65             String JavaDoc qualifiedType= fFullyQualifiedTypeName;
66             if (qualifiedType.indexOf('.') != -1 && replacementString.startsWith(qualifiedType) && !replacementString.endsWith(String.valueOf(';'))) {
67                 IType[] types= impRewrite.getCompilationUnit().getTypes();
68                 if (types.length > 0 && types[0].getSourceRange().getOffset() <= offset) {
69                     // ignore positions above type.
70
setReplacementString(impRewrite.addImport(getReplacementString()));
71                     return true;
72                 }
73             }
74         }
75         return false;
76     }
77
78
79     /* (non-Javadoc)
80      * @see ICompletionProposalExtension#apply(IDocument, char, int)
81      */

82     public void apply(IDocument document, char trigger, int offset) {
83         try {
84             ImportRewrite impRewrite= null;
85
86             if (fCompilationUnit != null && allowAddingImports()) {
87                 impRewrite= StubUtility.createImportRewrite(fCompilationUnit, true);
88             }
89
90             boolean importAdded= updateReplacementString(document, trigger, offset, impRewrite);
91
92             if (importAdded)
93                 setCursorPosition(getReplacementString().length());
94
95             super.apply(document, trigger, offset);
96
97             if (importAdded && impRewrite != null) {
98                 int oldLen= document.getLength();
99                 impRewrite.rewriteImports(new NullProgressMonitor()).apply(document, TextEdit.UPDATE_REGIONS);
100                 setReplacementOffset(getReplacementOffset() + document.getLength() - oldLen);
101             }
102         } catch (CoreException e) {
103             JavaPlugin.log(e);
104         } catch (BadLocationException e) {
105             JavaPlugin.log(e);
106         }
107     }
108
109     private boolean allowAddingImports() {
110         IPreferenceStore preferenceStore= JavaPlugin.getDefault().getPreferenceStore();
111         return preferenceStore.getBoolean(PreferenceConstants.CODEASSIST_ADDIMPORT);
112     }
113
114     /*
115      * @see org.eclipse.jdt.internal.ui.text.java.AbstractJavaCompletionProposal#isValidPrefix(java.lang.String)
116      */

117     protected boolean isValidPrefix(String JavaDoc prefix) {
118         return super.isValidPrefix(prefix) || isPrefix(prefix, fUnqualifiedTypeName) || isPrefix(prefix, fFullyQualifiedTypeName);
119     }
120
121     /*
122      * @see org.eclipse.jdt.internal.ui.text.java.JavaCompletionProposal#getCompletionText()
123      */

124     public CharSequence JavaDoc getPrefixCompletionText(IDocument document, int completionOffset) {
125         return fUnqualifiedTypeName;
126     }
127
128 }
129
Popular Tags