Examples of org.eclipse.jface.text.Position

org.eclipse.jface.text.Position
Positions describe text ranges of a document. Positions are adapted to changes applied to that document. The text range is specified by an offset and a length. Positions can be marked as deleted. Deleted positions are considered to no longer represent a valid text range in the managing document.
Positions attached to documents are usually updated by position updaters. Because position updaters are freely definable and because of the frequency in which they are used, the fields of a position are made publicly accessible. Clients other than position updaters are not allowed to access these public fields.

Positions cannot be used as keys in hash tables as they override equals and hashCode as they would be value objects.
@see org.eclipse.jface.text.IDocument

    ArrayList annotationList= new ArrayList();
    Iterator iter= model.getAnnotationIterator();
    while (iter.hasNext()) {
      Annotation annotation= (Annotation)iter.next();
      if (canFix(annotation)) {
        Position pos= model.getPosition(annotation);
        if (isAtPosition(offset, pos)) {
          collectSpellingProblems(annotation, pos, annotationList);
        }
      }
    }

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  public void run() {
    EditPosition editPosition= TextEditorPlugin.getDefault().getLastEditPosition();
    if (editPosition == null)
      return;


    final Position pos= editPosition.getPosition();
    if (pos == null || pos.isDeleted)
      return;


    IWorkbenchWindow window= getWindow();
    if (window == null)

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  public Position getPosition(Annotation annotation) {
    if (fRightDocument != null && annotation instanceof DiffRegion) {
      RangeDifference difference= ((DiffRegion)annotation).getDifference();
      try {
        int offset= fRightDocument.getLineOffset(difference.rightStart());
        return new Position(offset, fRightDocument.getLineOffset(difference.rightEnd() - 1) + fRightDocument.getLineLength(difference.rightEnd() - 1) - offset);
      } catch (BadLocationException e) {
        // ignore and return null;
      }
    }
    return null;

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   * @see #findAnnotation(int, int, boolean, Position)
   * @since 3.2
   */
  public Annotation gotoAnnotation(boolean forward) {
    ITextSelection selection= (ITextSelection) getSelectionProvider().getSelection();
    Position position= new Position(0, 0);
    Annotation annotation= findAnnotation(selection.getOffset(), selection.getLength(), forward, position);
    setStatusLineErrorMessage(null);
    setStatusLineMessage(null);
    
    if (annotation != null) {
      selectAndReveal(position.getOffset(), position.getLength());
      setStatusLineMessage(annotation.getText());
    }
    return annotation;
  }

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   * @since 3.2
   */
  protected Annotation findAnnotation(final int offset, final int length, boolean forward, Position annotationPosition) {


    Annotation nextAnnotation= null;
    Position nextAnnotationPosition= null;
    Annotation containingAnnotation= null;
    Position containingAnnotationPosition= null;
    boolean currentAnnotation= false;


    IDocument document= getDocumentProvider().getDocument(getEditorInput());
    int endOfDocument= document.getLength();
    int distance= Integer.MAX_VALUE;


    IAnnotationModel model= getDocumentProvider().getAnnotationModel(getEditorInput());
    Iterator e= model.getAnnotationIterator();
    while (e.hasNext()) {
      Annotation a= (Annotation) e.next();
      if (!isNavigationTarget(a))
        continue;


      Position p= model.getPosition(a);
      if (p == null)
        continue;


      if (forward && p.offset == offset || !forward && p.offset + p.getLength() == offset + length) {// || p.includes(offset)) {
        if (containingAnnotation == null || (forward && p.length >= containingAnnotationPosition.length || !forward && p.length >= containingAnnotationPosition.length)) {
          containingAnnotation= a;
          containingAnnotationPosition= p;
          currentAnnotation= p.length == length;
        }
      } else {
        int currentDistance= 0;


        if (forward) {
          currentDistance= p.getOffset() - offset;
          if (currentDistance < 0)
            currentDistance= endOfDocument + currentDistance;


          if (currentDistance < distance || currentDistance == distance && p.length < nextAnnotationPosition.length) {
            distance= currentDistance;
            nextAnnotation= a;
            nextAnnotationPosition= p;
          }
        } else {
          currentDistance= offset + length - (p.getOffset() + p.length);
          if (currentDistance < 0)
            currentDistance= endOfDocument + currentDistance;


          if (currentDistance < distance || currentDistance == distance && p.length < nextAnnotationPosition.length) {
            distance= currentDistance;

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        boolean doRemove= word == null;
        if (word == null)
          doRemove= true;
        else {
          String annotationWord= null;
          Position pos= model.getPosition(annotation);
          try {
            annotationWord= document.get(pos.getOffset(), pos.getLength());
          } catch (BadLocationException e) {
            continue;
          }
          doRemove= word.equals(annotationWord);
        }

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    /*
     * @see org.eclipse.ui.texteditor.spelling.ISpellingProblemCollector#accept(org.eclipse.ui.texteditor.spelling.SpellingProblem)
     */
    public void accept(SpellingProblem problem) {
      fAddAnnotations.put(new SpellingAnnotation(problem), new Position(problem.getOffset(), problem.getLength()));
    }

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    // look up the current range of the marker when the document has been edited
    IAnnotationModel model= getDocumentProvider().getAnnotationModel(getEditorInput());
    if (model instanceof AbstractMarkerAnnotationModel) {


      AbstractMarkerAnnotationModel markerModel= (AbstractMarkerAnnotationModel) model;
      Position pos= markerModel.getMarkerPosition(marker);
      if (pos != null && !pos.isDeleted()) {
        // use position instead of marker values
        start= pos.getOffset();
        end= pos.getOffset() + pos.getLength();
      }


      if (pos != null && pos.isDeleted()) {
        // do nothing if position has been deleted
        return;
      }
    }

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    // look up the current range of the marker when the document has been edited
    IAnnotationModel model= documentProvider.getAnnotationModel(editorInput);
    if (model instanceof AbstractMarkerAnnotationModel) {


      AbstractMarkerAnnotationModel markerModel= (AbstractMarkerAnnotationModel) model;
      Position pos= markerModel.getMarkerPosition(marker);
      if (pos != null && !pos.isDeleted()) {
        // use position instead of marker values
        start= pos.getOffset();
        end= pos.getOffset() + pos.getLength();
      }


      if (pos != null && pos.isDeleted()) {
        // do nothing if position has been deleted
        return;
      }
    }

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    final int activeLine= fRuler.getLineOfLastMouseButtonActivity();
    List markers= null;
    for (Iterator it= model.getAnnotationIterator(); it.hasNext();) {
      Annotation annotation= (Annotation) it.next();
      if (annotation instanceof MarkerAnnotation) {
        Position position= model.getPosition(annotation);
        if (includesLine(position, document, activeLine)) {
          if (markers == null)
            markers= new ArrayList(10);


          markers.add(((MarkerAnnotation) annotation).getMarker());

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