Examples of org.eclipse.jface.text.source.ISourceViewer

org.eclipse.jface.text.source.ISourceViewer
In addition to the text viewer functionality a source viewer supports:
- visual annotations based on an annotation model
- visual range indication
- management of text viewer add-ons
- explicit configuration
It is assumed that range indication and visual annotations are shown inside the same presentation area. There are no assumptions about whether this area is different from the viewer's text widget.
As the visibility of visual annotations can dynamically be changed, it is assumed that the annotation presentation area can dynamically be hidden if it is different from the text widget.
In order to provide backward compatibility for clients of ISourceViewer, extension interfaces are used as a means of evolution. The following extension interfaces exist:
- {@link org.eclipse.jface.text.source.ISourceViewerExtension} since version 2.1introducing the concept of an annotation overview.
- {@link org.eclipse.jface.text.source.ISourceViewerExtension2} since version 3.0allowing source viewers to roll back a previously performed configuration and allows access to the viewer's visual annotation model.
- {@link org.eclipse.jface.text.source.ISourceViewerExtension3} since version 3.2introducing the concept of a quick assist assistant and providing access to the quick assist invocation context as well as the current annotation hover.
- {@link org.eclipse.jface.text.source.ISourceViewerExtension4} since version 3.4introducing API to access a minimal set of content assistant APIs.
Clients may implement this interface and its extension interfaces or use the default implementation provided by {@link org.eclipse.jface.text.source.SourceViewer}.
@see org.eclipse.jface.text.source.ISourceViewerExtension @see org.eclipse.jface.text.source.ISourceViewerExtension2 @see org.eclipse.jface.text.source.ISourceViewerExtension3 @see org.eclipse.jface.text.source.ISourceViewerExtension4

   */
  protected void handlePreferenceStoreChanged(PropertyChangeEvent event) {


    try {


      ISourceViewer sourceViewer= getSourceViewer();
      if (sourceViewer == null)
        return;


      String property= event.getProperty();


      if (fSourceViewerDecorationSupport != null && fOverviewRuler != null && OVERVIEW_RULER.equals(property))  {
        if (isOverviewRulerVisible())
          showOverviewRuler();
        else
          hideOverviewRuler();
        return;
      }


      if (DISABLE_OVERWRITE_MODE.equals(property)) {
        enableOverwriteMode(isOverwriteModeEnabled());
        return;
      }


      if (LINE_NUMBER_RULER.equals(property)) {
        // only handle visibility of the combined column, but not the number/change only state
        IColumnSupport columnSupport= (IColumnSupport)getAdapter(IColumnSupport.class);
        if (isLineNumberRulerVisible() && fLineColumn == null) {
          RulerColumnDescriptor lineNumberColumnDescriptor= RulerColumnRegistry.getDefault().getColumnDescriptor(LineNumberColumn.ID);
          if (lineNumberColumnDescriptor != null)
            columnSupport.setColumnVisible(lineNumberColumnDescriptor, true);
        } else if (!isLineNumberRulerVisible() && fLineColumn != null && !fLineColumn.isShowingChangeInformation()) {
          columnSupport.setColumnVisible(fLineColumn.getDescriptor(), false);
          fLineColumn= null;
        }
        return;
      }


      if (AbstractDecoratedTextEditorPreferenceConstants.QUICK_DIFF_ALWAYS_ON.equals(property)) {
        showChangeInformation(isPrefQuickDiffAlwaysOn());
      }


      if (AbstractDecoratedTextEditorPreferenceConstants.EDITOR_TAB_WIDTH.equals(property)) {
        IPreferenceStore store= getPreferenceStore();
        if (store != null)
          sourceViewer.getTextWidget().setTabs(store.getInt(AbstractDecoratedTextEditorPreferenceConstants.EDITOR_TAB_WIDTH));
        if (isTabsToSpacesConversionEnabled()) {
          uninstallTabsToSpacesConverter();
          installTabsToSpacesConverter();
        }
        return;

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  private RutaPairMatcher bracketMatcher;


  private void configureToggleCommentAction() {
    IAction action = getAction("ToggleComment"); //$NON-NLS-1$
    if (action instanceof ToggleCommentAction) {
      ISourceViewer sourceViewer = getSourceViewer();
      SourceViewerConfiguration configuration = getSourceViewerConfiguration();
      ((ToggleCommentAction) action).configure(sourceViewer, configuration);
    }
  }

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    }


    RutaSelectionParser parser = new RutaSelectionParser();
    ISourceModule unit = (ISourceModule) getInputModelElement();
    ModuleDeclaration parsed = parser.parse(unit);
    ISourceViewer sourceViewer = getSourceViewer();
    StyledText styledText = sourceViewer.getTextWidget();
    int caret = 0;
    if (sourceViewer instanceof ITextViewerExtension5) {
      ITextViewerExtension5 extension = (ITextViewerExtension5) sourceViewer;
      caret = extension.widgetOffset2ModelOffset(styledText.getCaretOffset());
    } else {
      int offset = sourceViewer.getVisibleRegion().getOffset();
      caret = offset + styledText.getCaretOffset();
    }
    RutaReferenceVisitor visitor1 = new RutaReferenceVisitor(caret);
    ASTNode node = null;
    try {

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  /**
   * Jumps to the matching bracket.
   */
  @Override
  public void gotoMatchingBracket() {
    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("No bracket selected");
      sourceViewer.getTextWidget().getDisplay().beep();
      return;
    }


    // #26314
    int sourceCaretOffset = selection.getOffset() + selection.getLength();
    if (isSurroundedByBrackets(document, sourceCaretOffset))
      sourceCaretOffset -= selection.getLength();


    IRegion region = bracketMatcher.match(document, sourceCaretOffset);
    if (region == null) {
      setStatusLineErrorMessage("No matching bracket found");
      sourceViewer.getTextWidget().getDisplay().beep();
      return;
    }


    int offset = region.getOffset();
    int length = region.getLength();


    if (length < 1)
      return;


    int anchor = bracketMatcher.getAnchor();
    // http://dev.eclipse.org/bugs/show_bug.cgi?id=34195
    int targetOffset = (ICharacterPairMatcher.RIGHT == anchor) ? offset + 1 : offset + length;


    boolean visible = false;
    if (sourceViewer instanceof ITextViewerExtension5) {
      ITextViewerExtension5 extension = (ITextViewerExtension5) sourceViewer;
      visible = (extension.modelOffset2WidgetOffset(targetOffset) > -1);
    } else {
      IRegion visibleRegion = sourceViewer.getVisibleRegion();
      // http://dev.eclipse.org/bugs/show_bug.cgi?id=34195
      visible = (targetOffset >= visibleRegion.getOffset() && targetOffset <= visibleRegion
              .getOffset() + visibleRegion.getLength());
    }


    if (!visible) {
      setStatusLineErrorMessage("Matching bracket is outside selected element");
      sourceViewer.getTextWidget().getDisplay().beep();
      return;
    }


    if (selection.getLength() < 0)
      targetOffset -= selection.getLength();


    sourceViewer.setSelectedRange(targetOffset, selection.getLength());
    sourceViewer.revealRange(targetOffset, selection.getLength());
  }

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  public void addHyperlinkProvider(IHyperlinkProvider provider){
    this.providers.add(provider);
  }
  
  public void install() {
    ISourceViewer sourceViewer= editor.getViewer();
    if (sourceViewer == null)
      return;
      
    StyledText text= sourceViewer.getTextWidget();
    if (text == null || text.isDisposed())
      return;
    
    color = Display.getCurrent().getSystemColor(SWT.COLOR_BLUE);
//    updateColor(sourceViewer);


    sourceViewer.addTextInputListener(this);
    
    IDocument document= sourceViewer.getDocument();
    if (document != null)
      document.addDocumentListener(this);


    text.addKeyListener(this);
    text.addMouseListener(this);

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    if (cursor != null) {
      cursor.dispose();
      cursor= null;
    }
    
    ISourceViewer sourceViewer= editor.getViewer();
    if (sourceViewer != null)
      sourceViewer.removeTextInputListener(this);
    
    IDocumentProvider documentProvider= editor.getDocumentProvider();
    if (documentProvider != null) {
      IDocument document= documentProvider.getDocument(editor.getEditorInput());
      if (document != null)
        document.removeDocumentListener(this);
    }
      
//    IPreferenceStore preferenceStore= getPreferenceStore();
//    if (preferenceStore != null)
//      preferenceStore.removePropertyChangeListener(this);
    
    if (sourceViewer == null)
      return;
    
    StyledText text= sourceViewer.getTextWidget();
    if (text == null || text.isDisposed())
      return;
      
    text.removeKeyListener(this);
    text.removeMouseListener(this);

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    int offset= activeRegion.getOffset();
    int length= activeRegion.getLength();
    activeRegion= null;
      
    ISourceViewer viewer= editor.getViewer();
    if (viewer != null) {
      
      resetCursor(viewer);
      
      // Invalidate ==> remove applied text presentation
      if (!redrawAll && viewer instanceof ITextViewerExtension2)
        ((ITextViewerExtension2) viewer).invalidateTextPresentation(offset, length);
      else
        viewer.invalidateTextPresentation();
      
      // Remove underline
      if (viewer instanceof ITextViewerExtension5) {
        ITextViewerExtension5 extension= (ITextViewerExtension5) viewer;
        offset= extension.modelOffset2WidgetOffset(offset);
      } else {
        offset -= viewer.getVisibleRegion().getOffset();
      }
      try {
        StyledText text= viewer.getTextWidget();


        text.redrawRange(offset, length, false);
      } catch (IllegalArgumentException x) {
//        JavaPlugin.log(x);
      }

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        return;
      // modifier was already pressed
      active = true;
    }


    ISourceViewer viewer= editor.getViewer();
    if (viewer == null) {
      deactivate();
      return;
    }
      
    StyledText text= viewer.getTextWidget();
    if (text == null || text.isDisposed()) {
      deactivate();
      return;
    }

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        event.getDocument().removePosition(fRememberedPosition);
        activeRegion= new Region(fRememberedPosition.getOffset(), fRememberedPosition.getLength());
        fRememberedPosition= null;
        
        ISourceViewer viewer= editor.getViewer();
        if (viewer != null) {
          StyledText widget= viewer.getTextWidget();
          if (widget != null && !widget.isDisposed()) {
            widget.getDisplay().asyncExec(new Runnable() {
              public void run() {
                deactivate();
              }

View Full Code Here


  public void paintControl(PaintEvent event) {  
    if (activeRegion == null)
      return;


    ISourceViewer viewer= editor.getViewer();
    if (viewer == null)
      return;
      
    StyledText text= viewer.getTextWidget();
    if (text == null || text.isDisposed())
      return;
      
      
    int offset= 0;
    int length= 0;


    if (viewer instanceof ITextViewerExtension5) {
      
      ITextViewerExtension5 extension= (ITextViewerExtension5) viewer;
      IRegion widgetRange= extension.modelRange2WidgetRange(activeRegion);
      if (widgetRange == null)
        return;
        
      offset= widgetRange.getOffset();
      length= widgetRange.getLength();
      
    } else {
      
      IRegion region= viewer.getVisibleRegion();      
      if (!includes(region, activeRegion))
        return;        
      
      offset= activeRegion.getOffset() - region.getOffset();
      length= activeRegion.getLength();

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