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1
11
12 package org.eclipse.jdt.internal.ui.text.java.hover;
13
14 import java.io.IOException  ;
15
16 import org.eclipse.swt.SWT;
17 import org.eclipse.swt.widgets.Shell;
18
19 import org.eclipse.jface.text.Document;
20 import org.eclipse.jface.text.IDocument;
21 import org.eclipse.jface.text.IInformationControl;
22 import org.eclipse.jface.text.IInformationControlCreator;
23 import org.eclipse.jface.text.ITextHoverExtension;
24 import org.eclipse.jface.text.information.IInformationProviderExtension2;
25
26 import org.eclipse.ui.IEditorPart;
27 import org.eclipse.ui.part.IWorkbenchPartOrientation;
28
29 import org.eclipse.ui.editors.text.EditorsUI;
30
31 import org.eclipse.jdt.core.IJavaElement;
32 import org.eclipse.jdt.core.ILocalVariable;
33 import org.eclipse.jdt.core.IMember;
34 import org.eclipse.jdt.core.ISourceReference;
35 import org.eclipse.jdt.core.ITypeParameter;
36 import org.eclipse.jdt.core.JavaModelException;
37
38 import org.eclipse.jdt.internal.corext.codemanipulation.StubUtility;
39 import org.eclipse.jdt.internal.corext.util.Strings;
40
41 import org.eclipse.jdt.internal.ui.JavaPlugin;
42 import org.eclipse.jdt.internal.ui.text.JavaCodeReader;
43
44
47 public class JavaSourceHover extends AbstractJavaEditorTextHover implements ITextHoverExtension, IInformationProviderExtension2 {
48
49
52 protected String getHoverInfo(IJavaElement[] result) {
53 int nResults= result.length;
54
55 if (nResults > 1)
56 return null;
57
58 IJavaElement curr= result[0];
59 if ((curr instanceof IMember || curr instanceof ILocalVariable || curr instanceof ITypeParameter) && curr instanceof ISourceReference) {
60 try {
61 String source= ((ISourceReference) curr).getSource();
62 if (source == null)
63 return null;
64
65 source= removeLeadingComments(source);
66 String delim= StubUtility.getLineDelimiterUsed(result[0]);
67
68 String [] sourceLines= Strings.convertIntoLines(source);
69 String firstLine= sourceLines[0];
70 if (!Character.isWhitespace(firstLine.charAt(0)))
71 sourceLines[0]= ""; Strings.trimIndentation(sourceLines, curr.getJavaProject());
73
74 if (!Character.isWhitespace(firstLine.charAt(0)))
75 sourceLines[0]= firstLine;
76
77 source= Strings.concatenate(sourceLines, delim);
78
79 return source;
80
81 } catch (JavaModelException ex) {
82 }
83 }
84
85 return null;
86 }
87
88 private String removeLeadingComments(String source) {
89 JavaCodeReader reader= new JavaCodeReader();
90 IDocument document= new Document(source);
91 int i;
92 try {
93 reader.configureForwardReader(document, 0, document.getLength(), true, false);
94 int c= reader.read();
95 while (c != -1 && (c == '\r' || c == '\n')) {
96 c= reader.read();
97 }
98 i= reader.getOffset();
99 reader.close();
100 } catch (IOException ex) {
101 i= 0;
102 } finally {
103 try {
104 if (reader != null)
105 reader.close();
106 } catch (IOException ex) {
107 JavaPlugin.log(ex);
108 }
109 }
110
111 if (i < 0)
112 return source;
113 return source.substring(i);
114 }
115
116
120 public IInformationControlCreator getHoverControlCreator() {
121 return new IInformationControlCreator() {
122 public IInformationControl createInformationControl(Shell parent) {
123 IEditorPart editor= getEditor();
124 int shellStyle= SWT.TOOL | SWT.NO_TRIM;
125 if (editor instanceof IWorkbenchPartOrientation)
126 shellStyle |= ((IWorkbenchPartOrientation)editor).getOrientation();
127 return new SourceViewerInformationControl(parent, shellStyle, SWT.NONE, EditorsUI.getTooltipAffordanceString());
128 }
129 };
130 }
131
132
136 public IInformationControlCreator getInformationPresenterControlCreator() {
137 return new IInformationControlCreator() {
138 public IInformationControl createInformationControl(Shell parent) {
139 int style= SWT.V_SCROLL | SWT.H_SCROLL;
140 int shellStyle= SWT.RESIZE | SWT.TOOL;
141 IEditorPart editor= getEditor();
142 if (editor instanceof IWorkbenchPartOrientation)
143 shellStyle |= ((IWorkbenchPartOrientation)editor).getOrientation();
144 return new SourceViewerInformationControl(parent, shellStyle, style);
145 }
146 };
147 }
148 }
149 |
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