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1
11 package org.eclipse.jdt.internal.ui.text.java;
12
13 import java.util.Collection  ;
14 import java.util.Set ;
15
16 import org.eclipse.core.runtime.Assert;
17 import org.eclipse.core.runtime.CoreException;
18 import org.eclipse.core.runtime.IStatus;
19
20 import org.eclipse.jface.resource.ImageDescriptor;
21
22 import org.eclipse.jface.text.BadLocationException;
23 import org.eclipse.jface.text.IDocument;
24 import org.eclipse.jface.text.IRegion;
25 import org.eclipse.jface.text.TextUtilities;
26 import org.eclipse.jface.text.contentassist.ICompletionProposalExtension4;
27
28 import org.eclipse.jdt.core.IMethod;
29 import org.eclipse.jdt.core.IType;
30 import org.eclipse.jdt.core.JavaConventions;
31 import org.eclipse.jdt.core.Signature;
32 import org.eclipse.jdt.core.dom.rewrite.ImportRewrite;
33 import org.eclipse.jdt.core.formatter.CodeFormatter;
34
35 import org.eclipse.jdt.internal.corext.codemanipulation.CodeGenerationSettings;
36 import org.eclipse.jdt.internal.corext.util.CodeFormatterUtil;
37 import org.eclipse.jdt.internal.corext.util.Strings;
38
39 import org.eclipse.jdt.ui.CodeGeneration;
40 import org.eclipse.jdt.ui.JavaElementImageDescriptor;
41
42 import org.eclipse.jdt.internal.ui.JavaPlugin;
43 import org.eclipse.jdt.internal.ui.JavaPluginImages;
44 import org.eclipse.jdt.internal.ui.preferences.JavaPreferencesSettings;
45 import org.eclipse.jdt.internal.ui.viewsupport.JavaElementImageProvider;
46
47
50 public class MethodDeclarationCompletionProposal extends JavaTypeCompletionProposal implements ICompletionProposalExtension4 {
51
52
53 public static void evaluateProposals(IType type, String prefix, int offset, int length, int relevance, Set suggestedMethods, Collection result) throws CoreException {
54 IMethod[] methods= type.getMethods();
55 if (!type.isInterface()) {
56 String constructorName= type.getElementName();
57 if (constructorName.length() > 0 && constructorName.startsWith(prefix) && !hasMethod(methods, constructorName) && suggestedMethods.add(constructorName)) {
58 result.add(new MethodDeclarationCompletionProposal(type, constructorName, null, offset, length, relevance + 500));
59 }
60 }
61
62 if (prefix.length() > 0 && !"main".equals(prefix) && !hasMethod(methods, prefix) && suggestedMethods.add(prefix)) { if (!JavaConventions.validateMethodName(prefix).matches(IStatus.ERROR)) {
64 result.add(new MethodDeclarationCompletionProposal(type, prefix, Signature.SIG_VOID, offset, length, relevance));
65 }
66 }
67 }
68
69 private static boolean hasMethod(IMethod[] methods, String name) {
70 for (int i= 0; i < methods.length; i++) {
71 IMethod curr= methods[i];
72 if (curr.getElementName().equals(name) && curr.getParameterTypes().length == 0) {
73 return true;
74 }
75 }
76 return false;
77 }
78
79 private final IType fType;
80 private final String fReturnTypeSig;
81 private final String fMethodName;
82
83 public MethodDeclarationCompletionProposal(IType type, String methodName, String returnTypeSig, int start, int length, int relevance) {
84 super("", type.getCompilationUnit(), start, length, null, getDisplayName(methodName, returnTypeSig), relevance); Assert.isNotNull(type);
86 Assert.isNotNull(methodName);
87
88 fType= type;
89 fMethodName= methodName;
90 fReturnTypeSig= returnTypeSig;
91
92 if (returnTypeSig == null) {
93 setProposalInfo(new ProposalInfo(type));
94
95 ImageDescriptor desc= new JavaElementImageDescriptor(JavaPluginImages.DESC_MISC_PUBLIC, JavaElementImageDescriptor.CONSTRUCTOR, JavaElementImageProvider.SMALL_SIZE);
96 setImage(JavaPlugin.getImageDescriptorRegistry().get(desc));
97 } else {
98 setImage(JavaPluginImages.get(JavaPluginImages.IMG_MISC_PRIVATE));
99 }
100 }
101
102 private static String getDisplayName(String methodName, String returnTypeSig) {
103 StringBuffer buf= new StringBuffer ();
104 buf.append(methodName);
105 buf.append('(');
106 buf.append(')');
107 if (returnTypeSig != null) {
108 buf.append(" "); buf.append(Signature.toString(returnTypeSig));
110 buf.append(" - "); buf.append(JavaTextMessages.MethodCompletionProposal_method_label);
112 } else {
113 buf.append(" - "); buf.append(JavaTextMessages.MethodCompletionProposal_constructor_label);
115 }
116 return buf.toString();
117 }
118
119
122 protected boolean updateReplacementString(IDocument document, char trigger, int offset, ImportRewrite impRewrite) throws CoreException, BadLocationException {
123
124 CodeGenerationSettings settings= JavaPreferencesSettings.getCodeGenerationSettings(fType.getJavaProject());
125 boolean addComments= settings.createComments;
126
127 String [] empty= new String [0];
128 String lineDelim= TextUtilities.getDefaultLineDelimiter(document);
129 String declTypeName= fType.getTypeQualifiedName('.');
130 boolean isInterface= fType.isInterface();
131
132 StringBuffer buf= new StringBuffer ();
133 if (addComments) {
134 String comment= CodeGeneration.getMethodComment(fType.getCompilationUnit(), declTypeName, fMethodName, empty, empty, fReturnTypeSig, empty, null, lineDelim);
135 if (comment != null) {
136 buf.append(comment);
137 buf.append(lineDelim);
138 }
139 }
140 if (fReturnTypeSig != null) {
141 if (!isInterface) {
142 buf.append("private "); }
144 } else {
145 buf.append("public "); }
147
148 if (fReturnTypeSig != null) {
149 buf.append(Signature.toString(fReturnTypeSig));
150 }
151 buf.append(' ');
152 buf.append(fMethodName);
153 if (isInterface) {
154 buf.append("();"); buf.append(lineDelim);
156 } else {
157 buf.append("() {"); buf.append(lineDelim);
159
160 String body= CodeGeneration.getMethodBodyContent(fType.getCompilationUnit(), declTypeName, fMethodName, fReturnTypeSig == null, "", lineDelim); if (body != null) {
162 buf.append(body);
163 buf.append(lineDelim);
164 }
165 buf.append("}"); buf.append(lineDelim);
167 }
168 String stub= buf.toString();
169
170 IRegion region= document.getLineInformationOfOffset(getReplacementOffset());
172 int lineStart= region.getOffset();
173 int indent= Strings.computeIndentUnits(document.get(lineStart, getReplacementOffset() - lineStart), settings.tabWidth, settings.indentWidth);
174
175 String replacement= CodeFormatterUtil.format(CodeFormatter.K_CLASS_BODY_DECLARATIONS, stub, indent, null, lineDelim, fType.getJavaProject());
176
177 if (replacement.endsWith(lineDelim)) {
178 replacement= replacement.substring(0, replacement.length() - lineDelim.length());
179 }
180
181 setReplacementString(Strings.trimLeadingTabsAndSpaces(replacement));
182 return true;
183 }
184
185 public CharSequence getPrefixCompletionText(IDocument document, int completionOffset) {
186 return new String (); }
188
189
192 public boolean isAutoInsertable() {
193 return false;
194 }
195 }
196 |
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