net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/phpeditor/JavaSourceViewer.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.phpeclipse.phpeditor;
  13
  14 import java.util.ArrayList;
  15
  16 import net.sourceforge.phpdt.internal.ui.text.SmartBackspaceManager;
  17 import net.sourceforge.phpdt.ui.PreferenceConstants;
  18 import net.sourceforge.phpdt.ui.text.PHPSourceViewerConfiguration;
  19
  20 import org.eclipse.jface.preference.IPreferenceStore;
  21 import org.eclipse.jface.preference.PreferenceConverter;
  22 //incastrix
  23 //import org.eclipse.jface.text.Assert;
  24 import org.eclipse.core.runtime.Assert;
  25 import org.eclipse.jface.text.ITextPresentationListener;
  26 import org.eclipse.jface.text.information.IInformationPresenter;
  27 import org.eclipse.jface.text.reconciler.IReconciler;
  28 import org.eclipse.jface.text.source.IOverviewRuler;
  29 import org.eclipse.jface.text.source.IVerticalRuler;
  30 import org.eclipse.jface.text.source.SourceViewerConfiguration;
  31 import org.eclipse.jface.text.source.projection.ProjectionViewer;
  32 import org.eclipse.jface.util.IPropertyChangeListener;
  33 import org.eclipse.jface.util.PropertyChangeEvent;
  34 import org.eclipse.swt.custom.StyledText;
  35 import org.eclipse.swt.graphics.Color;
  36 import org.eclipse.swt.graphics.Point;
  37 import org.eclipse.swt.graphics.RGB;
  38 import org.eclipse.swt.widgets.Composite;
  39 import org.eclipse.swt.widgets.Display;
  40 import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;
  41
  42 public class JavaSourceViewer extends ProjectionViewer implements
  43                 IPropertyChangeListener {
  44
  45         /**
  46          * Text operation code for requesting the outline for the current input.
  47          */
  48         public static final int SHOW_OUTLINE = 51;
  49
  50         /**
  51          * Text operation code for requesting the outline for the element at the
  52          * current position.
  53          */
  54         public static final int OPEN_STRUCTURE = 52;
  55
  56         /**
  57          * Text operation code for requesting the hierarchy for the current input.
  58          */
  59         public static final int SHOW_HIERARCHY = 53;
  60
  61         private IInformationPresenter fOutlinePresenter;
  62
  63         private IInformationPresenter fStructurePresenter;
  64
  65         // private IInformationPresenter fHierarchyPresenter;
  66
  67         /**
  68          * This viewer's foreground color.
  69          *
  70          * @since 3.0
  71          */
  72         private Color fForegroundColor;
  73
  74         /**
  75          * The viewer's background color.
  76          *
  77          * @since 3.0
  78          */
  79         private Color fBackgroundColor;
  80
  81         /**
  82          * This viewer's selection foreground color.
  83          *
  84          * @since 3.0
  85          */
  86         private Color fSelectionForegroundColor;
  87
  88         /**
  89          * The viewer's selection background color.
  90          *
  91          * @since 3.0
  92          */
  93         private Color fSelectionBackgroundColor;
  94
  95         /**
  96          * The preference store.
  97          *
  98          * @since 3.0
  99          */
 100         private IPreferenceStore fPreferenceStore;
 101
 102         /**
 103          * Is this source viewer configured?
 104          *
 105          * @since 3.0
 106          */
 107         private boolean fIsConfigured;
 108
 109         /**
 110          * The backspace manager of this viewer.
 111          *
 112          * @since 3.0
 113          */
 114         private SmartBackspaceManager fBackspaceManager;
 115
 116         public JavaSourceViewer(Composite parent, IVerticalRuler verticalRuler,
 117                         IOverviewRuler overviewRuler, boolean showAnnotationsOverview,
 118                         int styles, IPreferenceStore store) {
 119                 super(parent, verticalRuler, overviewRuler, showAnnotationsOverview,
 120                                 styles);
 121                 setPreferenceStore(store);
 122         }
 123
 124         /*
 125          * @see org.eclipse.jface.text.source.SourceViewer#createFormattingContext()
 126          * @since 3.0
 127          */
 128         // public IFormattingContext createFormattingContext() {
 129         //
 130         // IFormattingContext context= new CommentFormattingContext();
 131         // Map map= new Hashtable(JavaCore.getOptions());
 132         //
 133         // context.storeToMap(PreferenceConstants.getPreferenceStore(), map, false);
 134         // context.setProperty(FormattingContextProperties.CONTEXT_PREFERENCES,
 135         // map);
 136         //
 137         // return context;
 138         // }
 139         /*
 140          * @see ITextOperationTarget#doOperation(int)
 141          */
 142         public void doOperation(int operation) {
 143                 if (getTextWidget() == null)
 144                         return;
 145
 146                 switch (operation) {
 147                 case SHOW_OUTLINE:
 148                         fOutlinePresenter.showInformation();
 149                         return;
 150                 case OPEN_STRUCTURE:
 151                         fStructurePresenter.showInformation();
 152                         return;
 153                 case SHOW_HIERARCHY:
 154                         // fHierarchyPresenter.showInformation();
 155                         return;
 156                 case FORMAT:
 157                         Point point = getSelectedRange();
 158                         if (point.y == 0) {
 159                                 // setSelectedRange(0, getDocument().getLength());
 160                                 revealRange(0, getDocument().getLength());
 161                         }
 162                         break;
 163                 }
 164
 165                 super.doOperation(operation);
 166         }
 167
 168         /*
 169          * @see ITextOperationTarget#canDoOperation(int)
 170          */
 171         public boolean canDoOperation(int operation) {
 172                 if (operation == SHOW_OUTLINE)
 173                         return fOutlinePresenter != null;
 174                 if (operation == OPEN_STRUCTURE)
 175                         return fStructurePresenter != null;
 176                 if (operation == SHOW_HIERARCHY)
 177                         // return fHierarchyPresenter != null;
 178                         return false;
 179
 180                 return super.canDoOperation(operation);
 181         }
 182
 183         /*
 184          * @see ISourceViewer#configure(SourceViewerConfiguration)
 185          */
 186         public void configure(SourceViewerConfiguration configuration) {
 187                 super.configure(configuration);
 188                 if (configuration instanceof PHPSourceViewerConfiguration) {
 189                         fOutlinePresenter = ((PHPSourceViewerConfiguration) configuration)
 190                                         .getOutlinePresenter(this, false);
 191                         fOutlinePresenter.install(this);
 192                 }
 193                 if (configuration instanceof PHPSourceViewerConfiguration) {
 194                         fStructurePresenter = ((PHPSourceViewerConfiguration) configuration)
 195                                         .getOutlinePresenter(this, true);
 196                         fStructurePresenter.install(this);
 197                 }
 198                 if (configuration instanceof PHPSourceViewerConfiguration) {
 199                         // fHierarchyPresenter=
 200                         // ((PHPSourceViewerConfiguration)configuration).getHierarchyPresenter(this,
 201                         // true);
 202                         // fHierarchyPresenter.install(this);
 203
 204                         if (fPreferenceStore != null) {
 205                                 fPreferenceStore.addPropertyChangeListener(this);
 206                                 initializeViewerColors();
 207                         }
 208                 }
 209                 fIsConfigured = true;
 210         }
 211
 212         protected void initializeViewerColors() {
 213                 if (fPreferenceStore != null) {
 214
 215                         StyledText styledText = getTextWidget();
 216
 217                         // ----------- foreground color --------------------
 218                         Color color = fPreferenceStore
 219                                         .getBoolean(PreferenceConstants.EDITOR_FOREGROUND_DEFAULT_COLOR) ? null
 220                                         : createColor(fPreferenceStore,
 221                                                         PreferenceConstants.EDITOR_FOREGROUND_COLOR,
 222                                                         styledText.getDisplay());
 223                         styledText.setForeground(color);
 224
 225                         if (fForegroundColor != null)
 226                                 fForegroundColor.dispose();
 227
 228                         fForegroundColor = color;
 229
 230                         // ---------- background color ----------------------
 231                         color = fPreferenceStore
 232                                         .getBoolean(PreferenceConstants.EDITOR_BACKGROUND_DEFAULT_COLOR) ? null
 233                                         : createColor(fPreferenceStore,
 234                                                         PreferenceConstants.EDITOR_BACKGROUND_COLOR,
 235                                                         styledText.getDisplay());
 236                         styledText.setBackground(color);
 237
 238                         if (fBackgroundColor != null)
 239                                 fBackgroundColor.dispose();
 240
 241                         fBackgroundColor = color;
 242
 243                         // ----------- selection foreground color --------------------
 244                         color = fPreferenceStore
 245                                         .getBoolean(AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_DEFAULT_COLOR) ? null
 246                                         : createColor(
 247                                                         fPreferenceStore,
 248                                                         AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_COLOR,
 249                                                         styledText.getDisplay());
 250                         styledText.setSelectionForeground(color);
 251
 252                         if (fSelectionForegroundColor != null)
 253                                 fSelectionForegroundColor.dispose();
 254
 255                         fSelectionForegroundColor = color;
 256
 257                         // ---------- selection background color ----------------------
 258                         color = fPreferenceStore
 259                                         .getBoolean(AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_DEFAULT_COLOR) ? null
 260                                         : createColor(
 261                                                         fPreferenceStore,
 262                                                         AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_COLOR,
 263                                                         styledText.getDisplay());
 264                         styledText.setSelectionBackground(color);
 265
 266                         if (fSelectionBackgroundColor != null)
 267                                 fSelectionBackgroundColor.dispose();
 268
 269                         fSelectionBackgroundColor = color;
 270                 }
 271         }
 272
 273         /**
 274          * Creates a color from the information stored in the given preference
 275          * store. Returns <code>null</code> if there is no such information
 276          * available.
 277          *
 278          * @param store
 279          *            the store to read from
 280          * @param key
 281          *            the key used for the lookup in the preference store
 282          * @param display
 283          *            the display used create the color
 284          * @return the created color according to the specification in the
 285          *         preference store
 286          * @since 3.0
 287          */
 288         private Color createColor(IPreferenceStore store, String key,
 289                         Display display) {
 290
 291                 RGB rgb = null;
 292
 293                 if (store.contains(key)) {
 294
 295                         if (store.isDefault(key))
 296                                 rgb = PreferenceConverter.getDefaultColor(store, key);
 297                         else
 298                                 rgb = PreferenceConverter.getColor(store, key);
 299
 300                         if (rgb != null)
 301                                 return new Color(display, rgb);
 302                 }
 303
 304                 return null;
 305         }
 306
 307         /*
 308          * @see org.eclipse.jface.text.source.ISourceViewerExtension2#unconfigure()
 309          * @since 3.0
 310          */
 311         public void unconfigure() {
 312                 if (fOutlinePresenter != null) {
 313                         fOutlinePresenter.uninstall();
 314                         fOutlinePresenter = null;
 315                 }
 316                 if (fStructurePresenter != null) {
 317                         fStructurePresenter.uninstall();
 318                         fStructurePresenter = null;
 319                 }
 320                 // if (fHierarchyPresenter != null) {
 321                 // fHierarchyPresenter.uninstall();
 322                 // fHierarchyPresenter= null;
 323                 // }
 324                 if (fForegroundColor != null) {
 325                         fForegroundColor.dispose();
 326                         fForegroundColor = null;
 327                 }
 328                 if (fBackgroundColor != null) {
 329                         fBackgroundColor.dispose();
 330                         fBackgroundColor = null;
 331                 }
 332                 if (fPreferenceStore != null)
 333                         fPreferenceStore.removePropertyChangeListener(this);
 334
 335                 super.unconfigure();
 336
 337                 fIsConfigured = false;
 338         }
 339
 340         /*
 341          * @see org.eclipse.jface.text.source.SourceViewer#rememberSelection()
 342          */
 343         public Point rememberSelection() {
 344                 return super.rememberSelection();
 345         }
 346
 347         /*
 348          * @see org.eclipse.jface.text.source.SourceViewer#restoreSelection()
 349          */
 350         public void restoreSelection() {
 351                 super.restoreSelection();
 352         }
 353
 354         /*
 355          * @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)
 356          */
 357         public void propertyChange(PropertyChangeEvent event) {
 358                 String property = event.getProperty();
 359                 if (PreferenceConstants.EDITOR_FOREGROUND_COLOR.equals(property)
 360                                 || PreferenceConstants.EDITOR_FOREGROUND_DEFAULT_COLOR
 361                                                 .equals(property)
 362                                 || PreferenceConstants.EDITOR_BACKGROUND_COLOR.equals(property)
 363                                 || PreferenceConstants.EDITOR_BACKGROUND_DEFAULT_COLOR
 364                                                 .equals(property)
 365                                 || AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_COLOR
 366                                                 .equals(property)
 367                                 || AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_DEFAULT_COLOR
 368                                                 .equals(property)
 369                                 || AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_COLOR
 370                                                 .equals(property)
 371                                 || AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_DEFAULT_COLOR
 372                                                 .equals(property)) {
 373                         initializeViewerColors();
 374                 }
 375         }
 376
 377         /**
 378          * Sets the preference store on this viewer.
 379          *
 380          * @param store
 381          *            the preference store
 382          *
 383          * @since 3.0
 384          */
 385         public void setPreferenceStore(IPreferenceStore store) {
 386                 if (fIsConfigured && fPreferenceStore != null)
 387                         fPreferenceStore.removePropertyChangeListener(this);
 388
 389                 fPreferenceStore = store;
 390
 391                 if (fIsConfigured && fPreferenceStore != null) {
 392                         fPreferenceStore.addPropertyChangeListener(this);
 393                         initializeViewerColors();
 394                 }
 395         }
 396
 397         /*
 398          * @see org.eclipse.jface.text.source.SourceViewer#createControl(org.eclipse.swt.widgets.Composite,
 399          *      int)
 400          */
 401         protected void createControl(Composite parent, int styles) {
 402                 super.createControl(parent, styles);
 403
 404                 fBackspaceManager = new SmartBackspaceManager();
 405                 fBackspaceManager.install(this);
 406         }
 407
 408         /**
 409          * Returns the backspace manager for this viewer.
 410          *
 411          * @return the backspace manager for this viewer, or <code>null</code> if
 412          *         there is none
 413          * @since 3.0
 414          */
 415         public SmartBackspaceManager getBackspaceManager() {
 416                 return fBackspaceManager;
 417         }
 418
 419         /*
 420          * @see org.eclipse.jface.text.source.SourceViewer#handleDispose()
 421          */
 422         protected void handleDispose() {
 423                 if (fBackspaceManager != null) {
 424                         fBackspaceManager.uninstall();
 425                         fBackspaceManager = null;
 426                 }
 427
 428                 super.handleDispose();
 429         }
 430
 431         /**
 432          * Prepends the text presentation listener at the beginning of the viewer's
 433          * list of text presentation listeners. If the listener is already
 434          * registered with the viewer this call moves the listener to the beginning
 435          * of the list.
 436          *
 437          * @param listener
 438          *            the text presentation listener
 439          * @since 3.0
 440          */
 441         public void prependTextPresentationListener(
 442                         ITextPresentationListener listener) {
 443
 444                 Assert.isNotNull(listener);
 445
 446                 if (fTextPresentationListeners == null)
 447                         fTextPresentationListeners = new ArrayList();
 448
 449                 fTextPresentationListeners.remove(listener);
 450                 fTextPresentationListeners.add(0, listener);
 451         }
 452
 453         /**
 454          * Sets the given reconciler.
 455          *
 456          * @param reconciler
 457          *            the reconciler
 458          * @since 3.0
 459          */
 460         void setReconciler(IReconciler reconciler) {
 461                 fReconciler = reconciler;
 462         }
 463
 464         /**
 465          * Returns the reconciler.
 466          *
 467          * @return the reconciler or <code>null</code> if not set
 468          * @since 3.0
 469          */
 470         Object getReconciler() {
 471                 return fReconciler;
 472         }
 473 }