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 Deleted positions are considered to no longer represent a valid text range in the managing document.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

  }


  private void addAnnotations(Map<Annotation, Position> annotationToPositionMap) {
    IAnnotationModel model = getDocumentProvider().getAnnotationModel(getEditorInput());
    for (Annotation a : annotationToPositionMap.keySet()) {
      Position p = annotationToPositionMap.get(a);
      model.addAnnotation(a, p);
    }
  }

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        annotationLayer = annotationAccess.getLayer(annotation);
        if (annotationLayer < layer)
          continue;
      }


      Position position = model.getPosition(annotation);
      if (!includesRulerLine(position, document))
        continue;


      boolean isReadOnly = fTextEditor instanceof ITextEditorExtension
              && ((ITextEditorExtension) fTextEditor).isEditorInputReadOnly();

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  /*
   * @see org.eclipse.jface.text.IDocumentListener#documentAboutToBeChanged(org.eclipse.jface.text.DocumentEvent)
   */
  public void documentAboutToBeChanged(DocumentEvent event) {
    if (active && activeRegion != null) {
      fRememberedPosition= new Position(activeRegion.getOffset(), activeRegion.getLength());
      try {
        event.getDocument().addPosition(fRememberedPosition);
      } catch (BadLocationException x) {
        fRememberedPosition= null;
      }

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    final Iterator<AnnotationFS> mAnnotations = mDocument.getCAS().getAnnotationIndex()
            .iterator();


    while (mAnnotations.hasNext()) {
      AnnotationFS annotationFS = mAnnotations.next();
      annotationModel.addAnnotation(new EclipseAnnotationPeer(annotationFS), new Position(
              annotationFS.getBegin(), annotationFS.getEnd() - annotationFS.getBegin()));
    }
  }

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      IAnnotationModelExtension annotationModel = (IAnnotationModelExtension) getDocumentProvider().getAnnotationModel(getEditorInput());
      
      Map<Annotation, Position> addAnnotationMap = new HashMap<Annotation, Position>();
      
      for (AnnotationFS annotation : annotations) {
        addAnnotationMap.put(new EclipseAnnotationPeer(annotation), new Position(annotation.getBegin(), 
                annotation.getEnd() - annotation.getBegin()));
      }
      
      annotationModel.replaceAnnotations(null, addAnnotationMap);
    }

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      IAnnotationModelExtension annotationModel = (IAnnotationModelExtension) getDocumentProvider().getAnnotationModel(getEditorInput());
      
      Map<Annotation, Position> addAnnotationMap = new HashMap<Annotation, Position>();
      
      for (AnnotationFS annotation : annotations) {
        addAnnotationMap.put(new EclipseAnnotationPeer(annotation), new Position(annotation.getBegin(), 
                annotation.getEnd() - annotation.getBegin()));
      }
      
      annotationModel.replaceAnnotations(null, addAnnotationMap);
    }

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      IAnnotationModelExtension annotationModel = (IAnnotationModelExtension) getDocumentProvider().getAnnotationModel(getEditorInput());
      
      for (AnnotationFS annotation : annotations) {
        annotationModel.modifyAnnotationPosition(new EclipseAnnotationPeer(annotation), 
                new Position(annotation.getBegin(), annotation.getEnd() - annotation.getBegin()));
      }
      
      selectionChanged(getSite().getPage().getActivePart(), mFeatureStructureSelectionProvider.getSelection());
    }

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    // TODO: Build first a map, and then pass all annotations at once
    Map annotationsToAdd = new HashMap();
    
    while (mAnnotations.hasNext()) {
      AnnotationFS annotationFS = mAnnotations.next();
      annotationsToAdd.put(new EclipseAnnotationPeer(annotationFS), new Position(
              annotationFS.getBegin(), annotationFS.getEnd() - annotationFS.getBegin()));
    }
    
    ((IAnnotationModelExtension) annotationModel).replaceAnnotations(null, annotationsToAdd);
  }

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      IRegion region = frAdapter.find(0, ATTRIBUTE_REGEX, true, false, false, true);
      String attributeLabel = null;
      while (region != null){
        int offset = region.getOffset();
        int length = region.getLength();
        Position p = new Position(offset, length);
        document.addPosition(SEGMENTS, p);
        attributeLabel = document.get(region.getOffset(), region.getLength());
        Matcher sig = attributePattern.matcher(attributeLabel);
        if (sig.find()){
          attributeLabel = sig.group(2);
          fContent.add(new Segment(attributeLabel, p, makeIconString("attribute", sig.group(1))));
        }
        region = frAdapter.find(offset+length, ATTRIBUTE_REGEX, true, false, false, true);
      }
      // do the virtual attributes
      region = frAdapter.find(0, VIRTUAL_ATTRIBUTE_REGEX, true, false, false, true);
      attributeLabel = null;
      while (region != null){
        int offset = region.getOffset();
        int length = region.getLength();
        Position p = new Position(offset, length);
        document.addPosition(SEGMENTS, p);
        attributeLabel = document.get(region.getOffset(), region.getLength());
        Matcher sig = virtualAttributePattern.matcher(attributeLabel);
        if (sig.find()){
          attributeLabel = sig.group(2);
          fContent.add(new Segment(attributeLabel, p, makeIconString("virtual", sig.group(1))));
        }
        region = frAdapter.find(offset+length, VIRTUAL_ATTRIBUTE_REGEX, true, false, false, true);
      }
      // do the window attributes
      region = frAdapter.find(0, WINDOW_REGEX, true, false, false, true);
      attributeLabel = null;
      while (region != null){
        int offset = region.getOffset();
        int length = region.getLength();
        Position p = new Position(offset, length);
        document.addPosition(SEGMENTS, p);
        attributeLabel = document.get(region.getOffset(), region.getLength());
        Matcher sig = windowAttributePattern.matcher(attributeLabel);
        if (sig.find()){
          attributeLabel = sig.group(1);
          fContent.add(new Segment(attributeLabel, p, "icons/window_attribute.gif"));
        }
        region = frAdapter.find(offset+length, WINDOW_REGEX, true, false, false, true);
      }
      // do the class constants
      region = frAdapter.find(0, CONSTANT_REGEX, true, false, false, true);
      attributeLabel = null;
      while (region != null){
        int offset = region.getOffset();
        int length = region.getLength();
        Position p = new Position(offset, length);
        document.addPosition(SEGMENTS, p);
        attributeLabel = document.get(region.getOffset(), region.getLength());
        Matcher sig = constantPattern.matcher(attributeLabel);
        if (sig.find()){
          attributeLabel = sig.group(2);
          fContent.add(new Segment(attributeLabel, p, makeIconString("constant", sig.group(1))));
        }
        region = frAdapter.find(offset+length, CONSTANT_REGEX, true, false, false, true);
      }
      // do the method implementations
      region = frAdapter.find(0, CEX_SIGNATURE_REGEX, true, false, false, true);
      String methodSignature = null;
      while (region != null){
        int offset = region.getOffset();
        int length = region.getLength();
        Position p = new Position(offset, length);
        document.addPosition(SEGMENTS, p);
        methodSignature = document.get(region.getOffset(), region.getLength());
        Matcher sig = cexSignaturePattern.matcher(methodSignature);
        if (sig.find()){
          methodSignature = sig.group(1);

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    Matcher matcher = classConstanPattern.matcher(source);
    if (matcher.find()){
      this.publicc = (matcher.group(1).startsWith("public"));
      int start = matcher.start(1);
      int length = matcher.end(1)-matcher.start(1);
      visibilityPosition = new Position(start, length);
      document.addPosition(visibilityPosition);


      this.name = matcher.group(2);
      start = matcher.start(2);
      length = matcher.end(2)-matcher.start(2);
      namePosition = new Position(start, length);
      document.addPosition(namePosition);


      this.value = matcher.group(3);
      start = matcher.start(3);
      length = matcher.end(3)-matcher.start(3);
      valuePosition = new Position(start, length);
      document.addPosition(valuePosition);
    } 


    matcher = planConstanPattern.matcher(source);
    if (matcher.find()){


      this.name = matcher.group(1);
      int start = matcher.start(1);
      int length = matcher.end(1)-matcher.start(1);
      namePosition = new Position(start, length);
      document.addPosition(namePosition);


      this.value = matcher.group(2);
      start = matcher.start(2);
      length = matcher.end(2)-matcher.start(2);
      valuePosition = new Position(start, length);
      document.addPosition(valuePosition);


    }
    document.addPositionUpdater(new ConstantPositionUpdater("value", valuePosition));
  }

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