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


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


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

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      resetCursor(viewer);


      // 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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      String text= e.getText();
      int length= text == null ? 0 : text.length();


      if (fViewer instanceof ITextViewerExtension5) {
        ITextViewerExtension5 extension= (ITextViewerExtension5) fViewer;
        return extension.widgetRange2ModelRange(new Region(e.getOffset(), length));
      }


      IRegion visible= fViewer.getVisibleRegion();
      IRegion region= new Region(e.getOffset() + visible.getOffset(), length);
      return region;

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  public void apply(ITextViewer viewer, char trigger, int stateMask, int offset) {
    IDocument document = viewer.getDocument();
    // CMVC 252634 to compensate for "invisible" initial region
    int caretOffset = viewer.getTextWidget().getCaretOffset();
    if (viewer instanceof ITextViewerExtension5) {
      ITextViewerExtension5 extension = (ITextViewerExtension5) viewer;
      caretOffset = extension.widgetOffset2ModelOffset(caretOffset);
    }
    else {
      caretOffset = viewer.getTextWidget().getCaretOffset() + viewer.getVisibleRegion().getOffset();
    }

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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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        ranges[i].start += adjustment;
      }
    }
    else if (viewer instanceof ITextViewerExtension5) {
      // use ITextViewerExtension5
      ITextViewerExtension5 extension = (ITextViewerExtension5) viewer;


      // convert document regions back to widget regions
      for (int i = 0; i < ranges.length; i++) {
        // get document range, taking into account folding
        // regions in viewer
        IRegion region = extension.modelRange2WidgetRange(new Region(ranges[i].start, ranges[i].length));
        if (region != null) {
          ranges[i].start = region.getOffset();
          ranges[i].length = region.getLength();
        } // else what happens if region is not found?!
      }

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    IRegion styleRegion = null;
    ITextViewer viewer = getTextViewer();
    if (viewer instanceof ITextViewerExtension5) {
      // get document range, taking into account folding regions in
      // viewer
      ITextViewerExtension5 extension = (ITextViewerExtension5) viewer;
      styleRegion = extension.widgetRange2ModelRange(new Region(offset, length));
    }
    else {
      // get document range, taking into account viewer visible region
      // get visible region in viewer
      IRegion vr = null;

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  public void apply(ITextViewer viewer, char trigger, int stateMask, int offset) {
    IDocument document = viewer.getDocument();
    // CMVC 252634 to compensate for "invisible" initial region
    int caretOffset = viewer.getTextWidget().getCaretOffset();
    if (viewer instanceof ITextViewerExtension5) {
      ITextViewerExtension5 extension = (ITextViewerExtension5) viewer;
      caretOffset = extension.widgetOffset2ModelOffset(caretOffset);
    }
    else {
      caretOffset = viewer.getTextWidget().getCaretOffset() + viewer.getVisibleRegion().getOffset();
    }

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      String text= e.getText();
      int length= text == null ? 0 : text.length();


      if (fViewer instanceof ITextViewerExtension5) {
        ITextViewerExtension5 extension= (ITextViewerExtension5) fViewer;
        return extension.widgetRange2ModelRange(new Region(e.getOffset(), length));
      }


      IRegion visible= fViewer.getVisibleRegion();
      IRegion region= new Region(e.getOffset() + visible.getOffset(), length);
      return region;

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