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1
11 package org.eclipse.ui.internal.ide;
12
13 import java.util.Iterator  ;
14 import java.util.Map ;
15 import java.util.Set ;
16
17 import org.eclipse.core.resources.IProject;
18 import org.eclipse.core.resources.ProjectScope;
19 import org.eclipse.core.runtime.Platform;
20 import org.eclipse.core.runtime.preferences.IEclipsePreferences;
21 import org.eclipse.core.runtime.preferences.IScopeContext;
22 import org.eclipse.core.runtime.preferences.InstanceScope;
23 import org.eclipse.swt.SWT;
24 import org.eclipse.swt.events.SelectionAdapter;
25 import org.eclipse.swt.events.SelectionEvent;
26 import org.eclipse.swt.graphics.Font;
27 import org.eclipse.swt.layout.GridData;
28 import org.eclipse.swt.layout.GridLayout;
29 import org.eclipse.swt.widgets.Button;
30 import org.eclipse.swt.widgets.Combo;
31 import org.eclipse.swt.widgets.Composite;
32 import org.eclipse.swt.widgets.Control;
33 import org.eclipse.swt.widgets.Group;
34 import org.osgi.service.prefs.BackingStoreException;
35
36
41 public class LineDelimiterEditor {
42
43 private Button defaultButton;
44
45 private Button otherButton;
46
47 private Combo choiceCombo;
48
49
53 private IProject project;
54
55 private Group group;
56
57
64 public LineDelimiterEditor(Composite composite) {
65 this(composite, null);
66 }
67
68
78 public LineDelimiterEditor(Composite composite, IProject project) {
79 this.project = project;
80 createControl(composite);
81 }
82
83
90 protected void createControl(Composite parent) {
91 Font font = parent.getFont();
92 group = new Group(parent, SWT.NONE);
93 GridData data = new GridData(GridData.FILL_HORIZONTAL);
94 group.setLayoutData(data);
95 GridLayout layout = new GridLayout();
96 layout.numColumns = 2;
97 group.setLayout(layout);
98 group.setText(IDEWorkbenchMessages.IDEWorkspacePreference_fileLineDelimiter);
99 group.setFont(font);
100
101 SelectionAdapter buttonListener = new SelectionAdapter() {
102 public void widgetSelected(SelectionEvent e) {
103 if (e.widget.equals(defaultButton)) {
104 updateState(true);
105 } else {
106 updateState(false);
107 }
108 }
109 };
110
111 defaultButton = new Button(group, SWT.RADIO);
112 if (project == null) {
113 defaultButton.setText(IDEWorkbenchMessages.IDEWorkspacePreference_defaultLineDelim);
114 } else {
115 defaultButton.setText(IDEWorkbenchMessages.IDEWorkspacePreference_defaultLineDelimProj);
116 }
117
118 data = new GridData();
119 data.horizontalSpan = 2;
120 defaultButton.setLayoutData(data);
121 defaultButton.addSelectionListener(buttonListener);
122 defaultButton.setFont(font);
123
124 otherButton = new Button(group, SWT.RADIO);
125 otherButton
126 .setText(IDEWorkbenchMessages.IDEWorkspacePreference_otherLineDelim);
127 otherButton.addSelectionListener(buttonListener);
128 otherButton.setFont(font);
129
130 choiceCombo = new Combo(group, SWT.NONE | SWT.READ_ONLY);
131 data = new GridData();
132 choiceCombo.setFont(font);
133 choiceCombo.setLayoutData(data);
134 populateChoiceCombo(getChoices());
135 }
136
137
141 public void doLoad() {
142 if (choiceCombo != null) {
143 populateChoiceCombo(getChoices());
144 String resourcePreference = getStoredValue();
145 updateState(resourcePreference == null);
146 }
147 }
148
149
153 public void loadDefault() {
154 if(choiceCombo != null) {
155 updateState(true);
156 }
157 }
158
159
164 public String getStoredValue() {
165 IScopeContext[] scopeContext = new IScopeContext[] { getScopeContext() };
166 IEclipsePreferences node = scopeContext[0].getNode(Platform.PI_RUNTIME);
167 return node.get(Platform.PREF_LINE_SEPARATOR, null);
168 }
169
170
177 private IScopeContext getScopeContext() {
178 if (project != null) {
179 return new ProjectScope(project);
180 }
181
182 return new InstanceScope();
183 }
184
185
190 protected String [] getChoices() {
191 Set keys = Platform.knownPlatformLineSeparators().keySet();
192 String [] keyArray = new String [keys.size()];
193 keys.toArray(keyArray);
194 return keyArray;
195 }
196
197
200 private void populateChoiceCombo(String [] items) {
201 choiceCombo.setItems(items);
202
203 if (getStoredValue() == null) {
204 choiceCombo.setText(""); } else {
206 selectChoice();
207 }
208 }
209
210 private void updateState(boolean useDefault) {
211 if (useDefault) {
212 defaultButton.setSelection(true);
213 otherButton.setSelection(false);
214 choiceCombo.setEnabled(false);
215 } else {
216 defaultButton.setSelection(false);
217 otherButton.setSelection(true);
218 choiceCombo.setEnabled(true);
219 selectChoice();
220 }
221 }
222
223
230 private void selectChoice() {
231 String selection = null;
232 Map knownValues = Platform.knownPlatformLineSeparators();
233 Set keys = knownValues.keySet();
234 String current = getStoredValue();
235 if (current != null) {
236 for (Iterator iter = keys.iterator(); iter.hasNext();) {
237 String element = (String ) iter.next();
238 if (knownValues.get(element).equals(current)) {
239 selection = element;
240 break;
241 }
242 }
243 }
244 String [] items = choiceCombo.getItems();
245 for (int i = 0; i < items.length; i++) {
246 String item = items[i];
247 if (item.equals(selection)) {
248 choiceCombo.select(i);
249 break;
250 }
251 }
252 }
253
254
258 public void store() {
259 String val;
260 if (defaultButton.getSelection() || choiceCombo.getText().equals("")) { val = null;
262 } else {
263 Map lineSeparators = Platform.knownPlatformLineSeparators();
264 val = (String ) lineSeparators.get(choiceCombo.getText());
265 }
266
267 IEclipsePreferences node = getScopeContext().getNode(
268 Platform.PI_RUNTIME);
269 if (val == null) {
270 node.remove(Platform.PREF_LINE_SEPARATOR);
271 } else {
272 node.put(Platform.PREF_LINE_SEPARATOR, val);
273 }
274 try {
275 node.flush();
276 } catch (BackingStoreException e) {
277 IDEWorkbenchPlugin.log(e.getMessage(), e);
278 }
279
280 }
281
282
287 public void setEnabled(boolean enabled) {
288 group.setEnabled(enabled);
289 Control [] children = group.getChildren();
290 for (int i = 0; i < children.length; i++) {
291 children[i].setEnabled(enabled);
292
293 }
294 }
295
296 }
297 |
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