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1
11 package org.eclipse.jdt.internal.ui.text.java.hover;
12
13 import java.util.Properties  ;
14
15 import org.eclipse.core.resources.IStorage;
16
17 import org.eclipse.jface.internal.text.html.HTMLPrinter;
18
19 import org.eclipse.jface.text.IRegion;
20 import org.eclipse.jface.text.ITextViewer;
21 import org.eclipse.jface.text.Region;
22
23 import org.eclipse.ui.IEditorInput;
24
25 import org.eclipse.jdt.core.IJavaElement;
26 import org.eclipse.jdt.core.JavaModelException;
27 import org.eclipse.jdt.core.dom.ASTNode;
28 import org.eclipse.jdt.core.dom.CompilationUnit;
29 import org.eclipse.jdt.core.dom.QualifiedName;
30 import org.eclipse.jdt.core.dom.SimpleName;
31 import org.eclipse.jdt.core.dom.StringLiteral;
32
33 import org.eclipse.jdt.internal.corext.dom.NodeFinder;
34 import org.eclipse.jdt.internal.corext.refactoring.nls.AccessorClassReference;
35 import org.eclipse.jdt.internal.corext.refactoring.nls.NLSHintHelper;
36
37 import org.eclipse.jdt.internal.ui.JavaPlugin;
38 import org.eclipse.jdt.internal.ui.javaeditor.ASTProvider;
39 import org.eclipse.jdt.internal.ui.javaeditor.ClassFileEditor;
40 import org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor;
41 import org.eclipse.jdt.internal.ui.javaeditor.IClassFileEditorInput;
42 import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
43
44
49 public class NLSStringHover extends AbstractJavaEditorTextHover {
50
51
52
55 public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
56 if (!(getEditor() instanceof JavaEditor))
57 return null;
58
59 IJavaElement je= getEditorInputJavaElement();
60 if (je == null)
61 return null;
62
63 CompilationUnit ast= JavaPlugin.getDefault().getASTProvider().getAST(je, ASTProvider.WAIT_NO, null);
65 if (ast == null)
66 return null;
67
68 ASTNode node= NodeFinder.perform(ast, offset, 1);
69 if (node instanceof StringLiteral) {
70 StringLiteral stringLiteral= (StringLiteral)node;
71 return new Region(stringLiteral.getStartPosition(), stringLiteral.getLength());
72 } else if (node instanceof SimpleName) {
73 SimpleName simpleName= (SimpleName)node;
74 return new Region(simpleName.getStartPosition(), simpleName.getLength());
75 }
76
77 return null;
78 }
79
80
83 public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
84 if (!(getEditor() instanceof JavaEditor))
85 return null;
86
87 IJavaElement je= getEditorInputJavaElement();
88 if (je == null)
89 return null;
90
91 CompilationUnit ast= JavaPlugin.getDefault().getASTProvider().getAST(je, ASTProvider.WAIT_ACTIVE_ONLY, null);
92 if (ast == null)
93 return null;
94
95 ASTNode node= NodeFinder.perform(ast, hoverRegion.getOffset(), hoverRegion.getLength());
96 if (!(node instanceof StringLiteral) && !(node instanceof SimpleName))
97 return null;
98
99 if (node.getLocationInParent() == QualifiedName.QUALIFIER_PROPERTY)
100 return null;
101
102 AccessorClassReference ref= NLSHintHelper.getAccessorClassReference(ast, hoverRegion);
103 if (ref == null)
104 return null;
105
106 IStorage propertiesFile;
107 try {
108 propertiesFile= NLSHintHelper.getResourceBundle(je.getJavaProject(), ref);
109 if (propertiesFile == null)
110 return toHtml(JavaHoverMessages.NLSStringHover_NLSStringHover_PropertiesFileNotDetectedWarning, ""); } catch (JavaModelException ex) {
112 return null;
113 }
114
115 final String propertiesFileName= propertiesFile.getName();
116 Properties properties= NLSHintHelper.getProperties(propertiesFile);
117 if (properties == null)
118 return null;
119 if (properties.isEmpty())
120 return toHtml(propertiesFileName, JavaHoverMessages.NLSStringHover_NLSStringHover_missingKeyWarning);
121
122 String identifier= null;
123 if (node instanceof StringLiteral) {
124 identifier= ((StringLiteral)node).getLiteralValue();
125 } else {
126 identifier= ((SimpleName)node).getIdentifier();
127 }
128 if (identifier == null)
129 return null;
130
131 String value= properties.getProperty(identifier, null);
132 if (value != null)
133 value= HTMLPrinter.convertToHTMLContent(value);
134 else
135 value= JavaHoverMessages.NLSStringHover_NLSStringHover_missingKeyWarning;
136
137 return toHtml(propertiesFileName, value);
138 }
139
140 private String toHtml(String header, String string) {
141
142 StringBuffer buffer= new StringBuffer ();
143
144 HTMLPrinter.addSmallHeader(buffer, header);
145 HTMLPrinter.addParagraph(buffer, string);
146 HTMLPrinter.insertPageProlog(buffer, 0);
147 HTMLPrinter.addPageEpilog(buffer);
148 return buffer.toString();
149 }
150
151 private IJavaElement getEditorInputJavaElement() {
152 if (getEditor() instanceof CompilationUnitEditor)
153 return JavaPlugin.getDefault().getWorkingCopyManager().getWorkingCopy(getEditor().getEditorInput());
154 else if (getEditor() instanceof ClassFileEditor) {
155 IEditorInput editorInput= getEditor().getEditorInput();
156 if (editorInput instanceof IClassFileEditorInput)
157 return ((IClassFileEditorInput)editorInput).getClassFile();
158
159 }
160 return null;
161 }
162
163 }
164 |
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