GotoMatchingBracket implementiert
[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpeclipse / phpeditor / PHPEditor.java
index 470aa0f..ed60680 100644 (file)
@@ -11,44 +11,136 @@ Contributors:
     IBM Corporation - Initial implementation
     Klaus Hartlage - www.eclipseproject.de
 **********************************************************************/
+import net.sourceforge.phpdt.internal.ui.actions.CompositeActionGroup;
+import net.sourceforge.phpdt.internal.ui.text.PHPPairMatcher;
+import net.sourceforge.phpdt.ui.actions.GenerateActionGroup;
+import net.sourceforge.phpdt.ui.actions.GotoMatchingBracketAction;
+import net.sourceforge.phpeclipse.IPreferenceConstants;
+import net.sourceforge.phpeclipse.PHPeclipsePlugin;
+import net.sourceforge.phpeclipse.phpeditor.php.PHPCodeScanner;
+import net.sourceforge.phpeclipse.phpeditor.util.PHPColorProvider;
+
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.jface.action.Action;
+import org.eclipse.jface.action.IAction;
 import org.eclipse.jface.action.MenuManager;
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.jface.preference.PreferenceConverter;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITextOperationTarget;
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.text.ITextViewerExtension3;
+import org.eclipse.jface.text.Region;
+import org.eclipse.jface.text.source.AnnotationRulerColumn;
+import org.eclipse.jface.text.source.CompositeRuler;
 import org.eclipse.jface.text.source.ISourceViewer;
+import org.eclipse.jface.text.source.IVerticalRuler;
+import org.eclipse.jface.text.source.IVerticalRulerColumn;
+import org.eclipse.jface.text.source.LineNumberRulerColumn;
+import org.eclipse.jface.util.IPropertyChangeListener;
+import org.eclipse.jface.util.PropertyChangeEvent;
+import org.eclipse.swt.custom.StyledText;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.graphics.RGB;
 import org.eclipse.ui.IEditorInput;
+import org.eclipse.ui.actions.ActionContext;
+import org.eclipse.ui.actions.ActionGroup;
 import org.eclipse.ui.editors.text.TextEditor;
+import org.eclipse.ui.texteditor.ContentAssistAction;
 import org.eclipse.ui.texteditor.DefaultRangeIndicator;
+import org.eclipse.ui.texteditor.IEditorStatusLine;
+import org.eclipse.ui.texteditor.ITextEditorActionConstants;
 import org.eclipse.ui.texteditor.TextOperationAction;
 import org.eclipse.ui.views.contentoutline.IContentOutlinePage;
-
 /**
- * Java specific text editor.
+ * PHP specific text editor.
  */
 public class PHPEditor extends TextEditor {
+// extends StatusTextEditor implements IViewPartInputProvider  { // extends TextEditor {
 
+  // protected PHPActionGroup fActionGroups;
   /** The outline page */
   private PHPContentOutlinePage fOutlinePage;
+  private IPreferenceStore phpPrefStore;
 
+  /** The editor's bracket matcher */
+  private PHPPairMatcher fBracketMatcher;
+  /** The line number ruler column */
+  private LineNumberRulerColumn fLineNumberRulerColumn;
+
+  protected CompositeActionGroup fActionGroups;
+  /** The standard action groups added to the menu */
+  private GenerateActionGroup fGenerateActionGroup;
+  private CompositeActionGroup fContextMenuGroup;
   /**
    * Default constructor.
    */
   public PHPEditor() {
     super();
+    setEditorContextMenuId("#PHPEditorContext"); //$NON-NLS-1$
+    setRulerContextMenuId("#PHPRulerContext"); //$NON-NLS-1$
+  }
+  //
+  //   /**
+  //    * @see IMember#getCompilationUnit()
+  //    */
+  //   public ICompilationUnit getCompilationUnit() {
+  //           return this; 
+  //   }
+  //   /**
+  //    * @see org.phpeclipse.phpdt.internal.compiler.env.ICompilationUnit#getContents()
+  //    */
+  //   public char[] getContents() {
+  //           IDocument doc = this.getDocumentProvider().getDocument(this.getEditorInput());
+  //   
+  //           return doc.get().toCharArray();
+  //   }
+
+  /**
+   * Returns this document's complete text.
+   *
+   * @return the document's complete text
+   */
+  public String get() {
+    IDocument doc =
+      this.getDocumentProvider().getDocument(this.getEditorInput());
+    return doc.get();
+  }
+
+  /**
+   *  Returns the standard action group of this editor.
+   */
+  protected ActionGroup getActionGroup() {
+    return fActionGroups;
+  }
+
+  public PHPContentOutlinePage getfOutlinePage() {
+    return fOutlinePage;
   }
 
-  /** The <code>JavaEditor</code> implementation of this 
+  /** The <code>PHPEditor</code> implementation of this 
    * <code>AbstractTextEditor</code> method extend the 
    * actions to add those specific to the receiver
    */
   protected void createActions() {
     super.createActions();
-    setAction(
-      "ContentAssistProposal",
-      new TextOperationAction(
-        PHPEditorMessages.getResourceBundle(),
-        "ContentAssistProposal.",
-        this,
-        ISourceViewer.CONTENTASSIST_PROPOSALS));
+
+    Action action;
+    //    setAction(
+    //      "ContentAssistProposal",
+    //      new TextOperationAction(
+    //        PHPEditorMessages.getResourceBundle(),
+    //        "ContentAssistProposal.",
+    //        this,
+    //        ISourceViewer.CONTENTASSIST_PROPOSALS));
+    action = new ContentAssistAction(PHPEditorMessages.getResourceBundle(), "ContentAssistProposal.", this); //$NON-NLS-1$
+    action.setActionDefinitionId(
+      PHPEditorActionDefinitionIds.CONTENT_ASSIST_PROPOSALS);
+    setAction("ContentAssistProposal", action); //$NON-NLS-1$
+
     setAction(
       "ContentAssistTip",
       new TextOperationAction(
@@ -56,22 +148,70 @@ public class PHPEditor extends TextEditor {
         "ContentAssistTip.",
         this,
         ISourceViewer.CONTENTASSIST_CONTEXT_INFORMATION));
+
+    action =
+      new TextOperationAction(
+        PHPEditorMessages.getResourceBundle(),
+        "Comment.",
+        this,
+        ITextOperationTarget.PREFIX);
+    action.setActionDefinitionId(PHPEditorActionDefinitionIds.COMMENT);
+    setAction("Comment", action);
+
+    action =
+      new TextOperationAction(
+        PHPEditorMessages.getResourceBundle(),
+        "Uncomment.",
+        this,
+        ITextOperationTarget.STRIP_PREFIX);
+    action.setActionDefinitionId(PHPEditorActionDefinitionIds.UNCOMMENT);
+    setAction("Uncomment", action);
+
+    action = new TextOperationAction(PHPEditorMessages.getResourceBundle(), "Format.", this, ISourceViewer.FORMAT); //$NON-NLS-1$
+    action.setActionDefinitionId(PHPEditorActionDefinitionIds.FORMAT);
+    setAction("Format", action); //$NON-NLS-1$
+
+    markAsStateDependentAction("ContentAssistProposal", true); //$NON-NLS-1$
+    markAsStateDependentAction("Comment", true); //$NON-NLS-1$
+    markAsStateDependentAction("Uncomment", true); //$NON-NLS-1$
+    markAsStateDependentAction("Format", true); //$NON-NLS-1$
+
+    action = new GotoMatchingBracketAction(this);
+    action.setActionDefinitionId(
+      PHPEditorActionDefinitionIds.GOTO_MATCHING_BRACKET);
+    setAction(GotoMatchingBracketAction.GOTO_MATCHING_BRACKET, action);
+
+    fGenerateActionGroup =
+      new GenerateActionGroup(this, ITextEditorActionConstants.GROUP_EDIT);
+
+    fActionGroups =
+      new CompositeActionGroup(new ActionGroup[] { fGenerateActionGroup });
+
+    // We have to keep the context menu group separate to have better control over positioning
+    fContextMenuGroup =
+      new CompositeActionGroup(new ActionGroup[] { fGenerateActionGroup });
+    //      rg, 
+    //      new LocalHistoryActionGroup(this, ITextEditorActionConstants.GROUP_EDIT)});
   }
 
-  /** The <code>JavaEditor</code> implementation of this 
+  /** The <code>PHPEditor</code> implementation of this 
    * <code>AbstractTextEditor</code> method performs any extra 
-   * disposal actions required by the java editor.
+   * disposal actions required by the php editor.
    */
   public void dispose() {
     PHPEditorEnvironment.disconnect(this);
     if (fOutlinePage != null)
       fOutlinePage.setInput(null);
+
+    if (fActionGroups != null)
+      fActionGroups.dispose();
+
     super.dispose();
   }
 
-  /** The <code>JavaEditor</code> implementation of this 
+  /** The <code>PHPEditor</code> implementation of this 
    * <code>AbstractTextEditor</code> method performs any extra 
-   * revert behavior required by the java editor.
+   * revert behavior required by the php editor.
    */
   public void doRevertToSaved() {
     super.doRevertToSaved();
@@ -79,19 +219,26 @@ public class PHPEditor extends TextEditor {
       fOutlinePage.update();
   }
 
-  /** The <code>JavaEditor</code> implementation of this 
+  /** The <code>PHPEditor</code> implementation of this 
    * <code>AbstractTextEditor</code> method performs any extra 
-   * save behavior required by the java editor.
+   * save behavior required by the php editor.
    */
   public void doSave(IProgressMonitor monitor) {
     super.doSave(monitor);
+    // compile or not, according to the user preferences
+    IPreferenceStore store = phpPrefStore;
+    if (store.getBoolean(PHPeclipsePlugin.PHP_PARSE_ON_SAVE)) {
+      IAction a = PHPParserAction.getInstance();
+      if (a != null)
+        a.run();
+    }
     if (fOutlinePage != null)
       fOutlinePage.update();
   }
 
-  /** The <code>JavaEditor</code> implementation of this 
+  /** The <code>PHPEditor</code> implementation of this 
    * <code>AbstractTextEditor</code> method performs any extra 
-   * save as behavior required by the java editor.
+   * save as behavior required by the php editor.
    */
   public void doSaveAs() {
     super.doSaveAs();
@@ -99,7 +246,7 @@ public class PHPEditor extends TextEditor {
       fOutlinePage.update();
   }
 
-  /** The <code>JavaEditor</code> implementation of this 
+  /** The <code>PHPEditor</code> implementation of this 
    * <code>AbstractTextEditor</code> method performs sets the 
    * input of the outline page after AbstractTextEditor has set input.
    */
@@ -109,17 +256,35 @@ public class PHPEditor extends TextEditor {
       fOutlinePage.setInput(input);
   }
 
-  /** The <code>JavaEditor</code> implementation of this 
+  /*
+   * @see org.phpeclipse.phpdt.internal.ui.viewsupport.IViewPartInputProvider#getViewPartInput()
+   */
+//  public Object getViewPartInput() {
+//    return getEditorInput().getAdapter(IFile.class);
+//  }
+  
+  /** The <code>PHPEditor</code> implementation of this 
    * <code>AbstractTextEditor</code> method adds any 
-   * JavaEditor specific entries.
+   * PHPEditor specific entries.
    */
   public void editorContextMenuAboutToShow(MenuManager menu) {
     super.editorContextMenuAboutToShow(menu);
-    addAction(menu, "ContentAssistProposal"); //$NON-NLS-1$
-    addAction(menu, "ContentAssistTip"); //$NON-NLS-1$
+
+    addAction(menu, ITextEditorActionConstants.GROUP_EDIT, "Format"); //$NON-NLS-1$
+
+    ActionContext context =
+      new ActionContext(getSelectionProvider().getSelection());
+    fContextMenuGroup.setContext(context);
+    fContextMenuGroup.fillContextMenu(menu);
+    fContextMenuGroup.setContext(null);
+  }
+
+  protected void updateStateDependentActions() {
+    super.updateStateDependentActions();
+    fGenerateActionGroup.editorStateChanged();
   }
 
-  /** The <code>JavaEditor</code> implementation of this 
+  /** The <code>PHPEditor</code> implementation of this 
    * <code>AbstractTextEditor</code> method performs gets
    * the java content outline page if request is for a an 
    * outline page.
@@ -136,16 +301,341 @@ public class PHPEditor extends TextEditor {
     return super.getAdapter(required);
   }
 
+  //  public void openContextHelp() {
+  //    IDocument doc = this.getDocumentProvider().getDocument(this.getEditorInput());
+  //    ITextSelection selection = (ITextSelection) this.getSelectionProvider().getSelection();
+  //    int pos = selection.getOffset();
+  //    String word = getFunctionName(doc, pos);
+  //    openContextHelp(word);
+  //  }
+  //
+  //  private void openContextHelp(String word) {
+  //    open(word);
+  //  }
+  //
+  //  public static void open(String word) {
+  //    IHelp help = WorkbenchHelp.getHelpSupport();
+  //    if (help != null) {
+  //      IHelpResource helpResource = new PHPFunctionHelpResource(word);
+  //      WorkbenchHelp.getHelpSupport().displayHelpResource(helpResource);
+  //    } else {
+  //      //   showMessage(shell, dialogTitle, ActionMessages.getString("Open help not available"), false); //$NON-NLS-1$
+  //    }
+  //  }
+
+  //   private String getFunctionName(IDocument doc, int pos) {
+  //           Point word = PHPWordExtractor.findWord(doc, pos);
+  //           if (word != null) {
+  //                   try {
+  //                           return doc.get(word.x, word.y).replace('_', '-');
+  //                   } catch (BadLocationException e) {
+  //                   }
+  //           }
+  //           return "";
+  //   }
+
+  /*
+     * @see AbstractTextEditor#handlePreferenceStoreChanged(PropertyChangeEvent)
+     */
+  protected void handlePreferenceStoreChanged(PropertyChangeEvent event) {
+
+    try {
+
+      ISourceViewer sourceViewer = getSourceViewer();
+      if (sourceViewer == null)
+        return;
+
+      String property = event.getProperty();
+
+      //      if (JavaSourceViewerConfiguration.PREFERENCE_TAB_WIDTH.equals(property)) {
+      //        Object value= event.getNewValue();
+      //        if (value instanceof Integer) {
+      //          sourceViewer.getTextWidget().setTabs(((Integer) value).intValue());
+      //        } else if (value instanceof String) {
+      //          sourceViewer.getTextWidget().setTabs(Integer.parseInt((String) value));
+      //        }
+      //        return;
+      //      }
+
+      if (IPreferenceConstants.LINE_NUMBER_RULER.equals(property)) {
+        if (isLineNumberRulerVisible())
+          showLineNumberRuler();
+        else
+          hideLineNumberRuler();
+        return;
+      }
+
+      if (fLineNumberRulerColumn != null
+        && (IPreferenceConstants.LINE_NUMBER_COLOR.equals(property)
+          || PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT.equals(property)
+          || PREFERENCE_COLOR_BACKGROUND.equals(property))) {
+
+        initializeLineNumberRulerColumn(fLineNumberRulerColumn);
+      }
+
+    } finally {
+      super.handlePreferenceStoreChanged(event);
+    }
+  }
+  /**
+   * Shows the line number ruler column.
+   */
+  private void showLineNumberRuler() {
+    IVerticalRuler v = getVerticalRuler();
+    if (v instanceof CompositeRuler) {
+      CompositeRuler c = (CompositeRuler) v;
+      c.addDecorator(1, createLineNumberRulerColumn());
+    }
+  }
+
+  /**
+  * Return whether the line number ruler column should be 
+  * visible according to the preference store settings.
+  * @return <code>true</code> if the line numbers should be visible
+  */
+  private boolean isLineNumberRulerVisible() {
+    // IPreferenceStore store= getPreferenceStore();
+    return phpPrefStore.getBoolean(IPreferenceConstants.LINE_NUMBER_RULER);
+  }
+  /**
+   * Hides the line number ruler column.
+   */
+  private void hideLineNumberRuler() {
+    IVerticalRuler v = getVerticalRuler();
+    if (v instanceof CompositeRuler) {
+      CompositeRuler c = (CompositeRuler) v;
+      try {
+        c.removeDecorator(1);
+      } catch (Throwable e) {
+      }
+    }
+  }
+
+  /**
+  * Initializes the given line number ruler column from the preference store.
+  * @param rulerColumn the ruler column to be initialized
+  */
+  protected void initializeLineNumberRulerColumn(LineNumberRulerColumn rulerColumn) {
+    //   JavaTextTools textTools= JavaPlugin.getDefault().getJavaTextTools();
+    PHPColorProvider manager = PHPEditorEnvironment.getPHPColorProvider();
+
+    if (phpPrefStore != null) {
+
+      RGB rgb = null;
+      // foreground color
+      if (phpPrefStore.contains(IPreferenceConstants.LINE_NUMBER_COLOR)) {
+        if (phpPrefStore.isDefault(IPreferenceConstants.LINE_NUMBER_COLOR))
+          rgb =
+            PreferenceConverter.getDefaultColor(
+              phpPrefStore,
+              IPreferenceConstants.LINE_NUMBER_COLOR);
+        else
+          rgb =
+            PreferenceConverter.getColor(
+              phpPrefStore,
+              IPreferenceConstants.LINE_NUMBER_COLOR);
+      }
+      rulerColumn.setForeground(manager.getColor(rgb));
+
+      rgb = null;
+      // background color
+      if (!phpPrefStore
+        .getBoolean(
+          IPreferenceConstants.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT)) {
+        if (phpPrefStore
+          .contains(IPreferenceConstants.PREFERENCE_COLOR_BACKGROUND)) {
+          if (phpPrefStore
+            .isDefault(IPreferenceConstants.PREFERENCE_COLOR_BACKGROUND))
+            rgb =
+              PreferenceConverter.getDefaultColor(
+                phpPrefStore,
+                IPreferenceConstants.PREFERENCE_COLOR_BACKGROUND);
+          else
+            rgb =
+              PreferenceConverter.getColor(
+                phpPrefStore,
+                IPreferenceConstants.PREFERENCE_COLOR_BACKGROUND);
+        }
+        rulerColumn.setBackground(manager.getColor(rgb));
+      }
+
+    }
+  }
+
+  /**
+   * Creates a new line number ruler column that is appropriately initialized.
+   */
+  protected IVerticalRulerColumn createLineNumberRulerColumn() {
+    fLineNumberRulerColumn = new LineNumberRulerColumn();
+    initializeLineNumberRulerColumn(fLineNumberRulerColumn);
+    return fLineNumberRulerColumn;
+  }
+
+  /*
+   * @see AbstractTextEditor#createVerticalRuler()
+   */
+  protected IVerticalRuler createVerticalRuler() {
+    CompositeRuler ruler = new CompositeRuler();
+    ruler.addDecorator(0, new AnnotationRulerColumn(VERTICAL_RULER_WIDTH));
+    if (isLineNumberRulerVisible())
+      ruler.addDecorator(1, createLineNumberRulerColumn());
+    return ruler;
+  }
+
   /* (non-Javadoc)
-   * Method declared on AbstractTextEditor
+   * Method declared on TextEditor
    */
   protected void initializeEditor() {
-
     PHPEditorEnvironment.connect(this);
 
-    setSourceViewerConfiguration(new PHPSourceViewerConfiguration());
+    setSourceViewerConfiguration(new PHPSourceViewerConfiguration(this));
     setRangeIndicator(new DefaultRangeIndicator());
     setEditorContextMenuId("#PHPEditorContext"); //$NON-NLS-1$
     setRulerContextMenuId("#PHPRulerContext"); //$NON-NLS-1$
+    // setDocumentProvider(PHPeclipsePlugin.getCompilationUnitDocumentProvider());
+    phpPrefStore = PHPeclipsePlugin.getDefault().getPreferenceStore();
+
+    phpPrefStore.addPropertyChangeListener(new IPropertyChangeListener() {
+      public void propertyChange(PropertyChangeEvent event) {
+        PHPCodeScanner scanner = PHPEditorEnvironment.getPHPCodeScanner();
+        if (scanner != null) {
+          scanner.updateToken(PHPEditorEnvironment.getPHPColorProvider());
+        }
+        if (getSourceViewer() != null) {
+          getSourceViewer().invalidateTextPresentation();
+        }
+
+        String property = event.getProperty();
+        if (IPreferenceConstants.LINE_NUMBER_RULER.equals(property)) {
+          if (isLineNumberRulerVisible())
+            showLineNumberRuler();
+          else
+            hideLineNumberRuler();
+          return;
+        }
+      }
+    });
+  }
+  
+  private static IRegion getSignedSelection(ITextViewer viewer) {
+
+    StyledText text = viewer.getTextWidget();
+    int caretOffset = text.getCaretOffset();
+    Point selection = text.getSelection();
+
+    // caret left
+    int offset, length;
+    if (caretOffset == selection.x) {
+      offset = selection.y;
+      length = selection.x - selection.y;
+
+      // caret right
+    } else {
+      offset = selection.x;
+      length = selection.y - selection.x;
+    }
+
+    return new Region(offset, length);
+  }
+
+  private final static char[] BRACKETS = { '{', '}', '(', ')', '[', ']' };
+
+  private static boolean isBracket(char character) {
+    for (int i = 0; i != BRACKETS.length; ++i)
+      if (character == BRACKETS[i])
+        return true;
+    return false;
+  }
+
+  private static boolean isSurroundedByBrackets(
+    IDocument document,
+    int offset) {
+    if (offset == 0 || offset == document.getLength())
+      return false;
+
+    try {
+      return isBracket(document.getChar(offset - 1))
+        && isBracket(document.getChar(offset));
+
+    } catch (BadLocationException e) {
+      return false;
+    }
+  }
+  /**
+    * Jumps to the matching bracket.
+    */
+  public void gotoMatchingBracket() {
+
+    if (fBracketMatcher == null)
+      fBracketMatcher = new PHPPairMatcher(BRACKETS);
+
+    ISourceViewer sourceViewer = getSourceViewer();
+    IDocument document = sourceViewer.getDocument();
+    if (document == null)
+      return;
+
+    IRegion selection = getSignedSelection(sourceViewer);
+
+    int selectionLength = Math.abs(selection.getLength());
+    if (selectionLength > 1) {
+      setStatusLineErrorMessage(PHPEditorMessages.getString("GotoMatchingBracket.error.invalidSelection")); //$NON-NLS-1$              
+      sourceViewer.getTextWidget().getDisplay().beep();
+      return;
+    }
+
+    // #26314
+    int sourceCaretOffset = selection.getOffset() + selection.getLength();
+    if (isSurroundedByBrackets(document, sourceCaretOffset))
+      sourceCaretOffset -= selection.getLength();
+
+    IRegion region = fBracketMatcher.match(document, sourceCaretOffset);
+    if (region == null) {
+      setStatusLineErrorMessage(PHPEditorMessages.getString("GotoMatchingBracket.error.noMatchingBracket")); //$NON-NLS-1$             
+      sourceViewer.getTextWidget().getDisplay().beep();
+      return;
+    }
+
+    int offset = region.getOffset();
+    int length = region.getLength();
+
+    if (length < 1)
+      return;
+
+    int anchor = fBracketMatcher.getAnchor();
+    int targetOffset =
+      (PHPPairMatcher.RIGHT == anchor) ? offset : offset + length - 1;
+
+    boolean visible = false;
+    if (sourceViewer instanceof ITextViewerExtension3) {
+      ITextViewerExtension3 extension = (ITextViewerExtension3) sourceViewer;
+      visible = (extension.modelOffset2WidgetOffset(targetOffset) > -1);
+    } else {
+      IRegion visibleRegion = sourceViewer.getVisibleRegion();
+      visible =
+        (targetOffset >= visibleRegion.getOffset()
+          && targetOffset < visibleRegion.getOffset() + visibleRegion.getLength());
+    }
+
+    if (!visible) {
+      setStatusLineErrorMessage(PHPEditorMessages.getString("GotoMatchingBracket.error.bracketOutsideSelectedElement")); //$NON-NLS-1$         
+      sourceViewer.getTextWidget().getDisplay().beep();
+      return;
+    }
+
+    if (selection.getLength() < 0)
+      targetOffset -= selection.getLength();
+
+    sourceViewer.setSelectedRange(targetOffset, selection.getLength());
+    sourceViewer.revealRange(targetOffset, selection.getLength());
+  }
+  /**
+     * Ses the given message as error message to this editor's status line.
+     * @param msg message to be set
+     */
+  protected void setStatusLineErrorMessage(String msg) {
+    IEditorStatusLine statusLine =
+      (IEditorStatusLine) getAdapter(IEditorStatusLine.class);
+    if (statusLine != null)
+      statusLine.setMessage(true, msg, null);
   }
 }