How to use

setDocument

method

in

org.eclipse.jface.text.TextViewer

@Override
public void setInput(Object input) {
  IDocument document= null;
  if (input instanceof IDocument)
    document= (IDocument) input;
  setDocument(document);
}

@Override
public void setInput(Object input) {
  IDocument document= null;
  if (input instanceof IDocument)
    document= (IDocument) input;
  setDocument(document);
}

public void setDocument(IDocument document) {
  this.document = document;
  txtViewer.setDocument(document);
}

@Override
public void refresh() {
  setDocument(getDocument());
}

@Override
public void refresh() {
  setDocument(getDocument());
}

public void configure(final TextViewer viewer, Document document, boolean spellCheck) {
  if (spellCheck && viewer instanceof ISourceViewer) {
    configureAsEditor((ISourceViewer) viewer, document);
  } else {
    viewer.setDocument(document);
  }
  install(viewer, spellCheck);
}

@Override
public Control createControl(Composite parent) {
  fTextViewer = new TextViewer(parent, SWT.READ_ONLY);
  fTextViewer.setDocument(new Document());
  StyledText styleText = fTextViewer.getTextWidget();
  styleText.setText("\r\n\r\n" + DebugUIMessages.EmptyViewTab_Unable_to_create + "\n" + getRenderingName() + "\n\n" + DebugUIMessages.ErrorRendering_0 + fException.getMessage()); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
  return fTextViewer.getControl();
}

@Override
public void setDocument(IDocument document, IAnnotationModel annotationModel, int modelRangeOffset, int modelRangeLength) {
  disposeVisualAnnotationModel();
  if (annotationModel != null && document != null) {
    fVisualAnnotationModel= createVisualAnnotationModel(annotationModel);
    // Make sure the visual model uses the same lock as the underlying model
    if (annotationModel instanceof ISynchronizable && fVisualAnnotationModel instanceof ISynchronizable) {
      ISynchronizable sync= (ISynchronizable)fVisualAnnotationModel;
      sync.setLockObject(((ISynchronizable)annotationModel).getLockObject());
    }
    fVisualAnnotationModel.connect(document);
  }
  if (modelRangeOffset == -1 && modelRangeLength == -1)
    super.setDocument(document);
  else
    super.setDocument(document, modelRangeOffset, modelRangeLength);
  if (fVerticalRuler != null)
    fVerticalRuler.setModel(fVisualAnnotationModel);
  if (fOverviewRuler != null)
    fOverviewRuler.setModel(fVisualAnnotationModel);
}

@Override
public void setDocument(IDocument document, IAnnotationModel annotationModel, int modelRangeOffset, int modelRangeLength) {
  disposeVisualAnnotationModel();
  if (annotationModel != null && document != null) {
    fVisualAnnotationModel= createVisualAnnotationModel(annotationModel);
    // Make sure the visual model uses the same lock as the underlying model
    if (annotationModel instanceof ISynchronizable && fVisualAnnotationModel instanceof ISynchronizable) {
      ISynchronizable sync= (ISynchronizable)fVisualAnnotationModel;
      sync.setLockObject(((ISynchronizable)annotationModel).getLockObject());
    }
    fVisualAnnotationModel.connect(document);
  }
  if (modelRangeOffset == -1 && modelRangeLength == -1)
    super.setDocument(document);
  else
    super.setDocument(document, modelRangeOffset, modelRangeLength);
  if (fVerticalRuler != null)
    fVerticalRuler.setModel(fVisualAnnotationModel);
  if (fOverviewRuler != null)
    fOverviewRuler.setModel(fVisualAnnotationModel);
}

/**
 * Create the error page of this rendering
 *
 * @param parent the parent to add the page to
 */
private void createMessagePage(Composite parent) {
  if (fTextViewer == null) {
    fTextViewer = new TextViewer(parent, SWT.WRAP);
    fTextViewer.setDocument(new Document());
    StyledText styleText = fTextViewer.getTextWidget();
    styleText.setEditable(false);
    styleText.setEnabled(false);
  }
}

setDocument(null);

/**
 * Create the error page for this rendering.
 * The error page is used to report any error resulted from
 * getting memory from a memory block.
 * @param parent the parent composite
 */
private void createErrorPage(Composite parent)
{
  if (fTextViewer == null)
  {
    fTextViewer = new TextViewer(parent, SWT.WRAP);
    fTextViewer.setDocument(new Document());
    StyledText styleText = fTextViewer.getTextWidget();
    styleText.setEditable(false);
    styleText.setEnabled(false);
  }
}

setDocument(null);

fTextViewer.setDocument(new Document());
GridData gridData = new GridData(GridData.FILL_BOTH);
gridData.widthHint= 300;

titleViewer.setDocument(new Document(text));