OnTagsChanged

(on .NET 4.0 / Win7)

Hi Nick,

What version did you have before this and what base class is your tagger?

I was running the previous release (I was up to date before installing the latest). The GetTags function never gets hit.

public class DifferencesTagger : TaggerBase<IClassificationTag>
{

...
 
private void HighlightDifferences()
    {
      if (view == null)
        return;

      // Notify that tags changed
      this.OnTagsChanged(new TagsChangedEventArgs(new TextSnapshotRange(view.SyntaxEditor.Document.CurrentSnapshot, view.SyntaxEditor.Document.CurrentSnapshot.TextRange)));
    }

    //return the text ranges which should be highlighted
    public override IEnumerable<TagSnapshotRange<IClassificationTag>> GetTags(NormalizedTextSnapshotRangeCollection snapshotRanges, object parameter)
    {
      if (parameter != null && m_Diffs != null)
      {
        var snr = (ActiproSoftware.Text.TextSnapshotRange)parameter;
        foreach (ChangeEvent ce in m_Diffs)
        {
          var node = ((HL7Message)m_Parent.Message).GetSubComponentFromPath(ce.Path, false);
          if (node != null)
          {
            int index = node.Offset - m_Parent.GetTagOffset(node.Offset);
            if (snr.StartOffset <= index && snr.EndOffset >= index)
            {
              yield return new TagSnapshotRange<IClassificationTag>(
                           new TextSnapshotRange(this.view.CurrentSnapshot, TextRange.FromSpan(index, ce.CurrentValue.Length)),
                           new ClassificationTag(m_Parent.HighlightOnlyDeleted ? wordHighlightClassificationTypeDeleted : (ce.ChangeType == ChangeType.Added) ? wordHighlightClassificationTypeAdded : wordHighlightClassificationType));
            }
          }
        }
      }
    }

}
 

Hi Nick,

I just compared build 570 with 571 (latest) and nothing was changed in TaggerBase or any of the other tag-related classes in the Text assembly.  In the SyntaxEditor assembly though we did change the TextViewTagAggregator to begin-invoke the TagsChanged event instead of invoking TagsChanged.  But that seems to be the only change made between the two builds in the tagging area.

I've just tracked it down I think. I had multiple taggers, and it appeared that only the first one was being registered. When I compared them, they all had the same first paramater value in their constructors:

public SomeTagger(IEditorView view) 
      : base("Custom", ...

 All my taggers had the text "Custom". I've now changed them to make them all unique, and this appears to have fixed the problem.

Nick.