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1
11 package org.eclipse.jdt.internal.ui.text.java;
12
13 import org.eclipse.swt.graphics.Point;
14 import org.eclipse.swt.widgets.Shell;
15
16 import org.eclipse.jface.dialogs.MessageDialog;
17
18 import org.eclipse.jface.text.BadLocationException;
19 import org.eclipse.jface.text.IDocument;
20 import org.eclipse.jface.text.IRegion;
21 import org.eclipse.jface.text.Region;
22 import org.eclipse.jface.text.link.LinkedModeModel;
23 import org.eclipse.jface.text.link.LinkedModeUI;
24 import org.eclipse.jface.text.link.LinkedPosition;
25 import org.eclipse.jface.text.link.LinkedPositionGroup;
26
27 import org.eclipse.ui.IEditorPart;
28 import org.eclipse.ui.texteditor.link.EditorLinkedModeUI;
29
30 import org.eclipse.jdt.core.CompletionProposal;
31
32 import org.eclipse.jdt.ui.text.java.JavaContentAssistInvocationContext;
33
34 import org.eclipse.jdt.internal.ui.JavaPlugin;
35 import org.eclipse.jdt.internal.ui.javaeditor.EditorHighlightingSynchronizer;
36 import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
37
38
41 public final class ExperimentalProposal extends JavaMethodCompletionProposal {
42
43 private IRegion fSelectedRegion; private int[] fArgumentOffsets;
45 private int[] fArgumentLengths;
46
47 public ExperimentalProposal(CompletionProposal proposal, JavaContentAssistInvocationContext context) {
48 super(proposal, context);
49 }
50
51
54 public void apply(IDocument document, char trigger, int offset) {
55 super.apply(document, trigger, offset);
56 int baseOffset= getReplacementOffset();
57 String  replacement= getReplacementString();
58
59 if (fArgumentOffsets != null && getTextViewer() != null) {
60 try {
61 LinkedModeModel model= new LinkedModeModel();
62 for (int i= 0; i != fArgumentOffsets.length; i++) {
63 LinkedPositionGroup group= new LinkedPositionGroup();
64 group.addPosition(new LinkedPosition(document, baseOffset + fArgumentOffsets[i], fArgumentLengths[i], LinkedPositionGroup.NO_STOP));
65 model.addGroup(group);
66 }
67
68 model.forceInstall();
69 JavaEditor editor= getJavaEditor();
70 if (editor != null) {
71 model.addLinkingListener(new EditorHighlightingSynchronizer(editor));
72 }
73
74 LinkedModeUI ui= new EditorLinkedModeUI(model, getTextViewer());
75 ui.setExitPosition(getTextViewer(), baseOffset + replacement.length(), 0, Integer.MAX_VALUE);
76 ui.setExitPolicy(new ExitPolicy(')', document));
77 ui.setDoContextInfo(true);
78 ui.setCyclingMode(LinkedModeUI.CYCLE_WHEN_NO_PARENT);
79 ui.enter();
80
81 fSelectedRegion= ui.getSelectedRegion();
82
83 } catch (BadLocationException e) {
84 JavaPlugin.log(e);
85 openErrorDialog(e);
86 }
87 } else {
88 fSelectedRegion= new Region(baseOffset + replacement.length(), 0);
89 }
90 }
91
92
95 protected boolean needsLinkedMode() {
96 return false; }
98
99
102 protected String computeReplacementString() {
103
104 if (!hasParameters() || !hasArgumentList())
105 return super.computeReplacementString();
106
107 char[][] parameterNames= fProposal.findParameterNames(null);
108 int count= parameterNames.length;
109 fArgumentOffsets= new int[count];
110 fArgumentLengths= new int[count];
111 StringBuffer buffer= new StringBuffer (String.valueOf(fProposal.getName()));
112
113 FormatterPrefs prefs= getFormatterPrefs();
114 if (prefs.beforeOpeningParen)
115 buffer.append(SPACE);
116 buffer.append(LPAREN);
117
118 setCursorPosition(buffer.length());
119
120 if (prefs.afterOpeningParen)
121 buffer.append(SPACE);
122
123 for (int i= 0; i != count; i++) {
124 if (i != 0) {
125 if (prefs.beforeComma)
126 buffer.append(SPACE);
127 buffer.append(COMMA);
128 if (prefs.afterComma)
129 buffer.append(SPACE);
130 }
131
132 fArgumentOffsets[i]= buffer.length();
133 buffer.append(parameterNames[i]);
134 fArgumentLengths[i]= parameterNames[i].length;
135 }
136
137 if (prefs.beforeClosingParen)
138 buffer.append(SPACE);
139
140 buffer.append(RPAREN);
141
142 return buffer.toString();
143 }
144
145
151 private JavaEditor getJavaEditor() {
152 IEditorPart part= JavaPlugin.getActivePage().getActiveEditor();
153 if (part instanceof JavaEditor)
154 return (JavaEditor) part;
155 else
156 return null;
157 }
158
159
162 public Point getSelection(IDocument document) {
163 if (fSelectedRegion == null)
164 return new Point(getReplacementOffset(), 0);
165
166 return new Point(fSelectedRegion.getOffset(), fSelectedRegion.getLength());
167 }
168
169 private void openErrorDialog(BadLocationException e) {
170 Shell shell= getTextViewer().getTextWidget().getShell();
171 MessageDialog.openError(shell, JavaTextMessages.ExperimentalProposal_error_msg, e.getMessage());
172 }
173
174 }
175 |
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