Examples of org.eclipse.jface.text.ITextViewerExtension5

org.eclipse.jface.text.ITextViewerExtension5
Extension interface for {@link org.eclipse.jface.text.ITextViewer}. Defines a conceptual replacement of the original visible region concept. This interface replaces {@link org.eclipse.jface.text.ITextViewerExtension3}.
Introduces the explicit concept of model and widget coordinates. For example, a selection returned by the text viewer's control is a widget selection. A widget selection always maps to a certain range of the viewer's document. This range is considered the model selection.
All model ranges that have a corresponding widget ranges are considered "exposed model ranges". The viewer can be requested to expose a given model range. Thus, a visible region is a particular degeneration of exposed model ranges.
This interface allows implementers to follow a sophisticated presentation model in which the visible presentation is a complex projection of the viewer's input document. @since 3.0

      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();

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      Point absolutePosition= display.getCursorLocation();
      Point relativePosition= text.toControl(absolutePosition);
      
      int widgetOffset= text.getOffsetAtLocation(relativePosition);
      if (viewer instanceof ITextViewerExtension5) {
        ITextViewerExtension5 extension= (ITextViewerExtension5) viewer;
        return extension.widgetOffset2ModelOffset(widgetOffset);
      } else {
        return widgetOffset + viewer.getVisibleRegion().getOffset();
      }


    } catch (IllegalArgumentException e) {

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    // Underline
    int offset= 0;
    int length= 0;
    if (viewer instanceof ITextViewerExtension5) {
      ITextViewerExtension5 extension= (ITextViewerExtension5) viewer;
      IRegion widgetRange= extension.modelRange2WidgetRange(region);
      if (widgetRange == null)
        return;
        
      offset= widgetRange.getOffset();
      length= widgetRange.getLength();

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    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();

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    // go to after the match if matching to the right
    int targetOffset = (ICharacterPairMatcher.RIGHT == anchor) ? offset : 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());

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        }


        if (!(viewer instanceof ITextViewerExtension5))
            return;


        ITextViewerExtension5 viewer5 = (ITextViewerExtension5) viewer;


        // Make sure that we show as much of the selection
        // as possible with as little moving as possible
        if (newSelection.getOffset() > visible.getOffset()) {
            // newSelection is below viewport

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    // Underline
    int offset = 0;
    int length = 0;
    if (fTextViewer instanceof ITextViewerExtension5) {
      ITextViewerExtension5 extension = (ITextViewerExtension5) fTextViewer;
      IRegion widgetRange = extension.modelRange2WidgetRange(region);
      if (widgetRange == null)
        return;


      offset = widgetRange.getOffset();
      length = widgetRange.getLength();

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    else
      fTextViewer.invalidateTextPresentation();


    // Remove underline
    if (fTextViewer instanceof ITextViewerExtension5) {
      ITextViewerExtension5 extension = (ITextViewerExtension5) fTextViewer;
      offset = extension.modelOffset2WidgetOffset(offset);
    }
    else {
      offset -= fTextViewer.getVisibleRegion().getOffset();
    }
    try {

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    int offset = 0;
    int length = 0;


    if (fTextViewer instanceof ITextViewerExtension5) {


      ITextViewerExtension5 extension = (ITextViewerExtension5) fTextViewer;
      IRegion widgetRange = extension.modelRange2WidgetRange(fActiveRegion);
      if (widgetRange == null)
        return;


      offset = widgetRange.getOffset();
      length = widgetRange.getLength();

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      Point absolutePosition = display.getCursorLocation();
      Point relativePosition = text.toControl(absolutePosition);


      int widgetOffset = text.getOffsetAtLocation(relativePosition);
      if (getTextViewer() instanceof ITextViewerExtension5) {
        ITextViewerExtension5 extension = (ITextViewerExtension5) getTextViewer();
        return extension.widgetOffset2ModelOffset(widgetOffset);
      } else {
        return widgetOffset + getTextViewer().getVisibleRegion().getOffset();
      }


    } catch (IllegalArgumentException e) {

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