net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/preferences/FoldingConfigurationBlock.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11
  12 package net.sourceforge.phpdt.internal.ui.preferences;
  13
  14 import java.util.ArrayList;
  15 import java.util.HashMap;
  16 import java.util.Iterator;
  17 import java.util.Map;
  18
  19 import net.sourceforge.phpdt.internal.ui.text.folding.JavaFoldingStructureProviderDescriptor;
  20 import net.sourceforge.phpdt.internal.ui.text.folding.JavaFoldingStructureProviderRegistry;
  21 import net.sourceforge.phpdt.internal.ui.util.PixelConverter;
  22 import net.sourceforge.phpdt.ui.PreferenceConstants;
  23 import net.sourceforge.phpdt.ui.text.folding.IJavaFoldingPreferenceBlock;
  24 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  25
  26 import org.eclipse.core.runtime.CoreException;
  27 import org.eclipse.core.runtime.IStatus;
  28 import org.eclipse.core.runtime.Status;
  29 import org.eclipse.jface.text.Assert;
  30 import org.eclipse.jface.viewers.ComboViewer;
  31 import org.eclipse.jface.viewers.ISelectionChangedListener;
  32 import org.eclipse.jface.viewers.IStructuredContentProvider;
  33 import org.eclipse.jface.viewers.IStructuredSelection;
  34 import org.eclipse.jface.viewers.LabelProvider;
  35 import org.eclipse.jface.viewers.SelectionChangedEvent;
  36 import org.eclipse.jface.viewers.StructuredSelection;
  37 import org.eclipse.jface.viewers.Viewer;
  38 import org.eclipse.swt.SWT;
  39 import org.eclipse.swt.custom.StackLayout;
  40 import org.eclipse.swt.events.SelectionEvent;
  41 import org.eclipse.swt.events.SelectionListener;
  42 import org.eclipse.swt.graphics.Image;
  43 import org.eclipse.swt.layout.FillLayout;
  44 import org.eclipse.swt.layout.GridData;
  45 import org.eclipse.swt.layout.GridLayout;
  46 import org.eclipse.swt.widgets.Button;
  47 import org.eclipse.swt.widgets.Combo;
  48 import org.eclipse.swt.widgets.Composite;
  49 import org.eclipse.swt.widgets.Control;
  50 import org.eclipse.swt.widgets.Label;
  51
  52 /**
  53  * Configures Java Editor folding preferences.
  54  *
  55  * @since 3.0
  56  */
  57 class FoldingConfigurationBlock {
  58
  59         private static class ErrorPreferences implements IJavaFoldingPreferenceBlock {
  60                 private String fMessage;
  61
  62                 protected ErrorPreferences(String message) {
  63                         fMessage= message;
  64                 }
  65
  66                 /*
  67                  * @see net.sourceforge.phpdt.internal.ui.text.folding.IJavaFoldingPreferences#createControl(org.eclipse.swt.widgets.Group)
  68                  */
  69                 public Control createControl(Composite composite) {
  70                         Composite inner= new Composite(composite, SWT.NONE);
  71                         inner.setLayout(new FillLayout(SWT.VERTICAL));
  72
  73                         Label label= new Label(inner, SWT.CENTER);
  74                         label.setText(fMessage);
  75
  76                         return inner;
  77                 }
  78
  79                 public void initialize() {
  80                 }
  81
  82                 public void performOk() {
  83                 }
  84
  85                 public void performDefaults() {
  86                 }
  87
  88                 public void dispose() {
  89                 }
  90
  91         }
  92
  93         /** The overlay preference store. */
  94         private final OverlayPreferenceStore fStore;
  95
  96         /* The controls */
  97         private Combo fProviderCombo;
  98         private Button fFoldingCheckbox;
  99         private ComboViewer fProviderViewer;
 100         private Map fProviderDescriptors;
 101         private Composite fGroup;
 102         private Map fProviderPreferences;
 103         private Map fProviderControls;
 104         private StackLayout fStackLayout;
 105
 106
 107         public FoldingConfigurationBlock(OverlayPreferenceStore store) {
 108                 Assert.isNotNull(store);
 109                 fStore= store;
 110                 fStore.addKeys(createOverlayStoreKeys());
 111                 fProviderDescriptors= createListModel();
 112                 fProviderPreferences= new HashMap();
 113                 fProviderControls= new HashMap();
 114         }
 115
 116         private Map createListModel() {
 117                 JavaFoldingStructureProviderRegistry reg= PHPeclipsePlugin.getDefault().getFoldingStructureProviderRegistry();
 118                 reg.reloadExtensions();
 119                 JavaFoldingStructureProviderDescriptor[] descs= reg.getFoldingProviderDescriptors();
 120                 Map map= new HashMap();
 121                 for (int i= 0; i < descs.length; i++) {
 122                         map.put(descs[i].getId(), descs[i]);
 123                 }
 124                 return map;
 125         }
 126
 127         private OverlayPreferenceStore.OverlayKey[] createOverlayStoreKeys() {
 128
 129                 ArrayList overlayKeys= new ArrayList();
 130
 131                 overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_FOLDING_ENABLED));
 132                 overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.STRING, PreferenceConstants.EDITOR_FOLDING_PROVIDER));
 133
 134                 OverlayPreferenceStore.OverlayKey[] keys= new OverlayPreferenceStore.OverlayKey[overlayKeys.size()];
 135                 overlayKeys.toArray(keys);
 136                 return keys;
 137         }
 138
 139         /**
 140          * Creates page for folding preferences.
 141          *
 142          * @param parent the parent composite
 143          * @return the control for the preference page
 144          */
 145         Control createControl(Composite parent) {
 146
 147                 Composite composite= new Composite(parent, SWT.NULL);
 148                 // assume parent page uses griddata
 149                 GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_CENTER | GridData.VERTICAL_ALIGN_FILL);
 150                 composite.setLayoutData(gd);
 151                 GridLayout layout= new GridLayout();
 152                 layout.numColumns= 2;
 153                 PixelConverter pc= new PixelConverter(composite);
 154                 layout.verticalSpacing= pc.convertHeightInCharsToPixels(1) / 2;
 155                 composite.setLayout(layout);
 156
 157
 158                 /* check box for new editors */
 159                 fFoldingCheckbox= new Button(composite, SWT.CHECK);
 160                 fFoldingCheckbox.setText(PreferencesMessages.getString("FoldingConfigurationBlock.enable")); //$NON-NLS-1$
 161                 gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING | GridData.VERTICAL_ALIGN_BEGINNING);
 162                 fFoldingCheckbox.setLayoutData(gd);
 163                 fFoldingCheckbox.addSelectionListener(new SelectionListener() {
 164                         public void widgetSelected(SelectionEvent e) {
 165                                 boolean enabled= fFoldingCheckbox.getSelection();
 166                                 fStore.setValue(PreferenceConstants.EDITOR_FOLDING_ENABLED, enabled);
 167                                 updateCheckboxDependencies();
 168                         }
 169
 170                         public void widgetDefaultSelected(SelectionEvent e) {
 171                         }
 172                 });
 173
 174                 Label label= new Label(composite, SWT.CENTER);
 175                 gd= new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING);
 176                 label.setLayoutData(gd);
 177
 178                 /* list */
 179                 Composite comboComp= new Composite(composite, SWT.NONE);
 180                 gd= new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING);
 181                 GridLayout gridLayout= new GridLayout(2, false);
 182                 gridLayout.marginWidth= 0;
 183                 comboComp.setLayout(gridLayout);
 184
 185                 Label comboLabel= new Label(comboComp, SWT.CENTER);
 186                 gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING | GridData.VERTICAL_ALIGN_CENTER);
 187                 comboLabel.setLayoutData(gd);
 188                 comboLabel.setText(PreferencesMessages.getString("FoldingConfigurationBlock.combo_caption")); //$NON-NLS-1$
 189
 190                 label= new Label(composite, SWT.CENTER);
 191                 gd= new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING);
 192                 label.setLayoutData(gd);
 193
 194                 fProviderCombo= new Combo(comboComp, SWT.READ_ONLY | SWT.DROP_DOWN);
 195                 gd= new GridData(GridData.HORIZONTAL_ALIGN_END | GridData.VERTICAL_ALIGN_CENTER);
 196                 fProviderCombo.setLayoutData(gd);
 197
 198                 /* list viewer */
 199                 fProviderViewer= new ComboViewer(fProviderCombo);
 200                 fProviderViewer.setContentProvider(new IStructuredContentProvider() {
 201
 202                         /*
 203                          * @see org.eclipse.jface.viewers.IContentProvider#dispose()
 204                          */
 205                         public void dispose() {
 206                         }
 207
 208                         /*
 209                          * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
 210                          */
 211                         public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 212                         }
 213
 214                         /*
 215                          * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
 216                          */
 217                         public Object[] getElements(Object inputElement) {
 218                                 return fProviderDescriptors.values().toArray();
 219                         }
 220                 });
 221                 fProviderViewer.setLabelProvider(new LabelProvider() {
 222                         /*
 223                          * @see org.eclipse.jface.viewers.LabelProvider#getImage(java.lang.Object)
 224                          */
 225                         public Image getImage(Object element) {
 226                                 return null;
 227                         }
 228
 229                         /*
 230                          * @see org.eclipse.jface.viewers.LabelProvider#getText(java.lang.Object)
 231                          */
 232                         public String getText(Object element) {
 233                                 return ((JavaFoldingStructureProviderDescriptor) element).getName();
 234                         }
 235                 });
 236                 fProviderViewer.addSelectionChangedListener(new ISelectionChangedListener() {
 237
 238                         public void selectionChanged(SelectionChangedEvent event) {
 239                                 IStructuredSelection sel= (IStructuredSelection) event.getSelection();
 240                                 if (!sel.isEmpty()) {
 241                                         fStore.setValue(PreferenceConstants.EDITOR_FOLDING_PROVIDER, ((JavaFoldingStructureProviderDescriptor) sel.getFirstElement()).getId());
 242                                         updateListDependencies();
 243                                 }
 244                         }
 245                 });
 246                 fProviderViewer.setInput(fProviderDescriptors);
 247                 fProviderViewer.refresh();
 248
 249                 Composite groupComp= new Composite(composite, SWT.NONE);
 250                 gd= new GridData(GridData.FILL_BOTH);
 251                 gd.horizontalSpan= 2;
 252                 groupComp.setLayoutData(gd);
 253                 gridLayout= new GridLayout(1, false);
 254                 gridLayout.marginWidth= 0;
 255                 groupComp.setLayout(gridLayout);
 256
 257                 /* contributed provider preferences. */
 258                 fGroup= new Composite(groupComp, SWT.NONE);
 259                 gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING | GridData.VERTICAL_ALIGN_BEGINNING);
 260                 fGroup.setLayoutData(gd);
 261                 fStackLayout= new StackLayout();
 262                 fGroup.setLayout(fStackLayout);
 263
 264                 return composite;
 265         }
 266
 267         private void updateCheckboxDependencies() {
 268         }
 269
 270         void updateListDependencies() {
 271                 String id= fStore.getString(PreferenceConstants.EDITOR_FOLDING_PROVIDER);
 272                 JavaFoldingStructureProviderDescriptor desc= (JavaFoldingStructureProviderDescriptor) fProviderDescriptors.get(id);
 273                 IJavaFoldingPreferenceBlock prefs;
 274
 275                 if (desc == null) {
 276                         // safety in case there is no such descriptor
 277                         String message= PreferencesMessages.getString("FoldingConfigurationBlock.error.not_exist"); //$NON-NLS-1$
 278                         PHPeclipsePlugin.log(new Status(IStatus.WARNING, PHPeclipsePlugin.getPluginId(), IStatus.OK, message, null));
 279                         prefs= new ErrorPreferences(message);
 280                 } else {
 281                         prefs= (IJavaFoldingPreferenceBlock) fProviderPreferences.get(id);
 282                         if (prefs == null) {
 283                                 try {
 284                                         prefs= desc.createPreferences();
 285                                         fProviderPreferences.put(id, prefs);
 286                                 } catch (CoreException e) {
 287                                         PHPeclipsePlugin.log(e);
 288                                         prefs= new ErrorPreferences(e.getLocalizedMessage());
 289                                 }
 290                         }
 291                 }
 292
 293                 Control control= (Control) fProviderControls.get(id);
 294                 if (control == null) {
 295                         control= prefs.createControl(fGroup);
 296                         if (control == null) {
 297                                 String message= PreferencesMessages.getString("FoldingConfigurationBlock.info.no_preferences"); //$NON-NLS-1$
 298                                 control= new ErrorPreferences(message).createControl(fGroup);
 299                         } else {
 300                                 fProviderControls.put(id, control);
 301                         }
 302                 }
 303                 fStackLayout.topControl= control;
 304                 control.pack();
 305                 fGroup.layout();
 306                 fGroup.getParent().layout();
 307
 308                 prefs.initialize();
 309         }
 310
 311         void initialize() {
 312                 restoreFromPreferences();
 313         }
 314
 315         void performOk() {
 316                 for (Iterator it= fProviderPreferences.values().iterator(); it.hasNext();) {
 317                         IJavaFoldingPreferenceBlock prefs= (IJavaFoldingPreferenceBlock) it.next();
 318                         prefs.performOk();
 319                 }
 320         }
 321
 322         void performDefaults() {
 323                 restoreFromPreferences();
 324                 for (Iterator it= fProviderPreferences.values().iterator(); it.hasNext();) {
 325                         IJavaFoldingPreferenceBlock prefs= (IJavaFoldingPreferenceBlock) it.next();
 326                         prefs.performDefaults();
 327                 }
 328         }
 329
 330         void dispose() {
 331                 for (Iterator it= fProviderPreferences.values().iterator(); it.hasNext();) {
 332                         IJavaFoldingPreferenceBlock prefs= (IJavaFoldingPreferenceBlock) it.next();
 333                         prefs.dispose();
 334                 }
 335         }
 336
 337         private void restoreFromPreferences() {
 338                 boolean enabled= fStore.getBoolean(PreferenceConstants.EDITOR_FOLDING_ENABLED);
 339                 fFoldingCheckbox.setSelection(enabled);
 340                 updateCheckboxDependencies();
 341
 342                 String id= fStore.getString(PreferenceConstants.EDITOR_FOLDING_PROVIDER);
 343                 Object provider= fProviderDescriptors.get(id);
 344                 if (provider != null) {
 345                         fProviderViewer.setSelection(new StructuredSelection(provider), true);
 346                         updateListDependencies();
 347                 }
 348         }
 349 }