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1
11
12 package org.eclipse.jdt.internal.ui.refactoring.contentassist;
13
14 import java.util.ArrayList  ;
15 import java.util.Arrays ;
16 import java.util.List ;
17
18 import org.eclipse.core.runtime.Assert;
19 import org.eclipse.core.runtime.NullProgressMonitor;
20
21 import org.eclipse.swt.graphics.Image;
22
23 import org.eclipse.jface.contentassist.IContentAssistSubjectControl;
24 import org.eclipse.jface.contentassist.ISubjectControlContentAssistProcessor;
25 import org.eclipse.jface.preference.IPreferenceStore;
26 import org.eclipse.jface.resource.ImageDescriptor;
27
28 import org.eclipse.jface.text.ITextViewer;
29 import org.eclipse.jface.text.contentassist.ICompletionProposal;
30 import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
31 import org.eclipse.jface.text.contentassist.IContextInformation;
32 import org.eclipse.jface.text.contentassist.IContextInformationValidator;
33
34 import org.eclipse.jdt.core.CompletionRequestor;
35 import org.eclipse.jdt.core.ICompilationUnit;
36 import org.eclipse.jdt.core.IJavaProject;
37 import org.eclipse.jdt.core.JavaModelException;
38 import org.eclipse.jdt.core.WorkingCopyOwner;
39 import org.eclipse.jdt.core.compiler.IProblem;
40
41 import org.eclipse.jdt.internal.corext.refactoring.StubTypeContext;
42
43 import org.eclipse.jdt.ui.PreferenceConstants;
44 import org.eclipse.jdt.ui.text.java.CompletionProposalComparator;
45
46 import org.eclipse.jdt.internal.ui.JavaPlugin;
47 import org.eclipse.jdt.internal.ui.refactoring.RefactoringMessages;
48 import org.eclipse.jdt.internal.ui.text.java.JavaCompletionProposal;
49 import org.eclipse.jdt.internal.ui.text.java.JavaTypeCompletionProposal;
50 import org.eclipse.jdt.internal.ui.viewsupport.ImageDescriptorRegistry;
51
52
53 public class CUPositionCompletionProcessor implements IContentAssistProcessor, ISubjectControlContentAssistProcessor {
54
55 private static final ImageDescriptorRegistry IMAGE_DESC_REGISTRY= JavaPlugin.getImageDescriptorRegistry();
56
57 private String fErrorMessage;
58 private char[] fProposalAutoActivationSet;
59 private CompletionProposalComparator fComparator;
60
61 private CompletionContextRequestor fCompletionContextRequestor;
62
63 private CUPositionCompletionRequestor fCompletionRequestor;
64
65
70 public CUPositionCompletionProcessor(CUPositionCompletionRequestor completionRequestor) {
71 fCompletionRequestor= completionRequestor;
72
73 fComparator= new CompletionProposalComparator();
74 IPreferenceStore preferenceStore= JavaPlugin.getDefault().getPreferenceStore();
75 String triggers= preferenceStore.getString(PreferenceConstants.CODEASSIST_AUTOACTIVATION_TRIGGERS_JAVA);
76 fProposalAutoActivationSet = triggers.toCharArray();
77 }
78
79
87 public void setCompletionContext(final ICompilationUnit cuHandle, final String beforeString, final String afterString) {
88 fCompletionContextRequestor= new CompletionContextRequestor() {
89 final StubTypeContext fStubTypeContext= new StubTypeContext(cuHandle, beforeString, afterString);
90 public StubTypeContext getStubTypeContext() {
91 return fStubTypeContext;
92 }
93 };
94 if (cuHandle != null)
95 fCompletionRequestor.setJavaProject(cuHandle.getJavaProject());
96 }
97
98 public void setCompletionContextRequestor(CompletionContextRequestor completionContextRequestor) {
99 fCompletionContextRequestor= completionContextRequestor;
100 }
101
102
107 public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int documentOffset) {
108 Assert.isTrue(false, "ITextViewer not supported"); return null;
110 }
111
112
117 public IContextInformation[] computeContextInformation(ITextViewer viewer, int documentOffset) {
118 Assert.isTrue(false, "ITextViewer not supported"); return null;
120 }
121
122
125 public char[] getCompletionProposalAutoActivationCharacters() {
126 return fProposalAutoActivationSet;
127 }
128
129
132 public char[] getContextInformationAutoActivationCharacters() {
133 return null;
134 }
135
136
139 public String getErrorMessage() {
140 return fErrorMessage;
141 }
142
143
146 public IContextInformationValidator getContextInformationValidator() {
147 return null; }
149
150
153 public IContextInformation[] computeContextInformation(IContentAssistSubjectControl contentAssistSubjectControl, int documentOffset) {
154 return null;
155 }
156
157
160 public ICompletionProposal[] computeCompletionProposals(IContentAssistSubjectControl contentAssistSubjectControl, int documentOffset) {
161 if (fCompletionContextRequestor.getOriginalCu() == null)
162 return null;
163 String input= contentAssistSubjectControl.getDocument().get();
164 if (documentOffset == 0)
165 return null;
166 ICompletionProposal[] proposals= internalComputeCompletionProposals(documentOffset, input);
167 Arrays.sort(proposals, fComparator);
168 return proposals;
169 }
170
171 private ICompletionProposal[] internalComputeCompletionProposals(int documentOffset, String input) {
172 String cuString= fCompletionContextRequestor.getBeforeString() + input + fCompletionContextRequestor.getAfterString();
173 ICompilationUnit cu= null;
174 try {
175
182 cu= fCompletionContextRequestor.getOriginalCu().getWorkingCopy(new WorkingCopyOwner() {}, null, new NullProgressMonitor());
183 cu.getBuffer().setContents(cuString);
184 int cuPrefixLength= fCompletionContextRequestor.getBeforeString().length();
185 fCompletionRequestor.setOffsetReduction(cuPrefixLength);
186 cu.codeComplete(cuPrefixLength + documentOffset, fCompletionRequestor);
187
188 JavaCompletionProposal[] proposals= fCompletionRequestor.getResults();
189 if (proposals.length == 0) {
190 String errorMsg= fCompletionRequestor.getErrorMessage();
191 if (errorMsg == null || errorMsg.trim().length() == 0)
192 errorMsg= RefactoringMessages.JavaTypeCompletionProcessor_no_completion;
193 fErrorMessage= errorMsg;
194 } else {
195 fErrorMessage= fCompletionRequestor.getErrorMessage();
196 }
197 return proposals;
198 } catch (JavaModelException e) {
199 JavaPlugin.log(e);
200 return null;
201 } finally {
202 try {
203 if (cu != null)
204 cu.discardWorkingCopy();
205 } catch (JavaModelException e) {
206 JavaPlugin.log(e);
207 }
208 }
209 }
210
211 protected abstract static class CUPositionCompletionRequestor extends CompletionRequestor {
212 public static final char[] TRIGGER_CHARACTERS= new char[] { '.' };
213
214 private int fOffsetReduction;
215 private IJavaProject fJavaProject;
216
217 private List fProposals;
218 private String fErrorMessage2;
219
220 public IJavaProject getJavaProject() {
221 return fJavaProject;
222 }
223
224 private void setJavaProject(IJavaProject javaProject) {
225 fJavaProject= javaProject;
226 }
227
228 private void setOffsetReduction(int offsetReduction) {
229 fOffsetReduction= offsetReduction;
230 fProposals= new ArrayList ();
231 }
232
233 public final void completionFailure(IProblem error) {
234 fErrorMessage2= error.getMessage();
235 }
236
237 public final JavaCompletionProposal[] getResults() {
238 return (JavaCompletionProposal[]) fProposals.toArray(new JavaCompletionProposal[fProposals.size()]);
239 }
240
241 public final String getErrorMessage() {
242 return fErrorMessage2;
243 }
244
245 protected final void addAdjustedCompletion(String name, String completion,
246 int start, int end, int relevance, ImageDescriptor descriptor) {
247 JavaCompletionProposal javaCompletionProposal= new JavaCompletionProposal(completion, start - fOffsetReduction, end - start,
248 getImage(descriptor), name, relevance);
249 javaCompletionProposal.setTriggerCharacters(TRIGGER_CHARACTERS);
250 fProposals.add(javaCompletionProposal);
251 }
252
253 protected final void addAdjustedTypeCompletion(String name, String completion,
254 int start, int end, int relevance, ImageDescriptor descriptor, String fullyQualifiedName) {
255 JavaTypeCompletionProposal javaCompletionProposal= new JavaTypeCompletionProposal(
256 fullyQualifiedName == null ? completion : fullyQualifiedName, null,
257 fullyQualifiedName == null ? start - fOffsetReduction : 0,
258 end - start, getImage(descriptor), name, relevance, completion);
259 javaCompletionProposal.setTriggerCharacters(TRIGGER_CHARACTERS);
260 fProposals.add(javaCompletionProposal);
261 }
262
263 private static Image getImage(ImageDescriptor descriptor) {
264 return (descriptor == null) ? null : CUPositionCompletionProcessor.IMAGE_DESC_REGISTRY.get(descriptor);
265 }
266 }
267 }
268 |
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