/// <summary>
/// Iterates through the mapping of line number to span and draws the diagnostic in the appropriate position on the screen,
/// as well as adding the tag to the adornment layer.
/// </summary>
protected override void AddAdornmentsToAdornmentLayer_CallOnlyOnUIThread(NormalizedSnapshotSpanCollection changedSpanCollection)
{
// this method should only run on UI thread as we do WPF here.
Contract.ThrowIfFalse(TextView.VisualElement.Dispatcher.CheckAccess());
if (changedSpanCollection.IsEmpty())
{
return;
}
var viewLines = TextView.TextViewLines;
using var _ = PooledDictionary <int, IMappingTagSpan <InlineDiagnosticsTag> > .GetInstance(out var map);
AddSpansOnEachLine(changedSpanCollection, map);
foreach (var(lineNum, tagMappingSpan) in map)
{
// Mapping the IMappingTagSpan back up to the TextView's visual snapshot to ensure there will
// be no adornments drawn on disjoint spans.
if (!TryMapToSingleSnapshotSpan(tagMappingSpan.Span, TextView.TextSnapshot, out var span))
{
continue;
}
var geometry = viewLines.GetMarkerGeometry(span);
if (geometry is null)
{
continue;
}
// Need to get the SnapshotPoint to be able to get the IWpfTextViewLine
var point = tagMappingSpan.Span.Start.GetPoint(TextView.TextSnapshot, PositionAffinity.Predecessor);
if (point == null)
{
continue;
}
var lineView = viewLines.GetTextViewLineContainingBufferPosition(point.Value);
if (lineView is null)
{
continue;
}
// Looking for IEndOfLineTags and seeing if they exist on the same line as where the
// diagnostic would be drawn. If they are the same, then we do not want to draw
// the diagnostic.
var obstructingTags = _endLineTagAggregator.GetTags(lineView.Extent);
if (obstructingTags.Where(tag => tag.Tag.Type is not "Inline Diagnostics").Any())
{
continue;
}
var tag = tagMappingSpan.Tag;
var classificationType = _classificationRegistryService.GetClassificationType(InlineDiagnosticsTag.GetClassificationId(tag.ErrorType));
var graphicsResult = tag.GetGraphics(TextView, geometry, GetFormat(classificationType));
var visualElement = graphicsResult.VisualElement;
// Only place the diagnostics if the diagnostic would not intersect with the editor window
if (lineView.Right >= TextView.ViewportWidth - visualElement.DesiredSize.Width)
{
continue;
}
Canvas.SetLeft(visualElement,
tag.Location == InlineDiagnosticsLocations.PlacedAtEndOfCode ? lineView.Right :
tag.Location == InlineDiagnosticsLocations.PlacedAtEndOfEditor ? TextView.ViewportRight - visualElement.DesiredSize.Width :
throw ExceptionUtilities.UnexpectedValue(tag.Location));
Canvas.SetTop(visualElement, geometry.Bounds.Bottom - visualElement.DesiredSize.Height);
AdornmentLayer.AddAdornment(
behavior: AdornmentPositioningBehavior.TextRelative,
visualSpan: lineView.Extent,
tag: tag,
adornment: visualElement,
removedCallback: delegate { graphicsResult.Dispose(); });
}
}
/// <summary>
/// Iterates through the mapping of line number to span and draws the diagnostic in the appropriate position on the screen,
/// as well as adding the tag to the adornment layer.
/// </summary>
protected override void AddAdornmentsToAdornmentLayer_CallOnlyOnUIThread(NormalizedSnapshotSpanCollection changedSpanCollection)
{
// this method should only run on UI thread as we do WPF here.
Contract.ThrowIfFalse(TextView.VisualElement.Dispatcher.CheckAccess());
if (changedSpanCollection.IsEmpty())
{
return;
}
var viewLines = TextView.TextViewLines;
using var _ = PooledDictionary <IWpfTextViewLine, IMappingTagSpan <InlineDiagnosticsTag> > .GetInstance(out var map);
// First loop iterates through the snap collection and determines if an inline diagnostic can be drawn.
// Creates a mapping of the view line to the IMappingTagSpan with getting the first error that appears
// on the line if there are multiple.
foreach (var changedSpan in changedSpanCollection)
{
if (!viewLines.IntersectsBufferSpan(changedSpan))
{
continue;
}
var tagSpans = TagAggregator.GetTags(changedSpan);
foreach (var tagMappingSpan in tagSpans)
{
if (!ShouldDrawTag(changedSpan, tagMappingSpan, out var mappedPoint))
{
continue;
}
var viewLine = viewLines.GetTextViewLineContainingBufferPosition(mappedPoint);
// If the line does not have an associated tagMappingSpan and changedSpan, then add the first one.
if (!map.TryGetValue(viewLine, out var value))
{
map.Add(viewLine, tagMappingSpan);
}
else if (value.Tag.ErrorType is not PredefinedErrorTypeNames.SyntaxError && tagMappingSpan.Tag.ErrorType is PredefinedErrorTypeNames.SyntaxError)
{
// Draw the first instance of an error, if what is stored in the map at a specific line is
// not an error, then replace it. Otherwise, just get the first warning on the line.
map[viewLine] = tagMappingSpan;
}
}
}
// Second loop iterates through the map to go through and create the graphics that is being drawn
// on the canvas as well adding the tag to the Inline Diagnostics adornment layer.
foreach (var(lineView, tagMappingSpan) in map)
{
// Looking for IEndOfLineTags and seeing if they exist on the same line as where the
// diagnostic would be drawn. If they are the same, then we do not want to draw
// the diagnostic.
var obstructingTags = _endLineTagAggregator.GetTags(lineView.Extent);
if (obstructingTags.Where(tag => tag.Tag.Type is not "Inline Diagnostics").Any())
{
continue;
}
var tag = tagMappingSpan.Tag;
var classificationType = _classificationRegistryService.GetClassificationType(InlineDiagnosticsTag.GetClassificationId(tag.ErrorType));
// Pass in null! because the geometry is unused for drawing anything for Inline Diagnostics
var graphicsResult = tag.GetGraphics(TextView, unused: null !, GetFormat(classificationType));
var visualElement = graphicsResult.VisualElement;
// Only place the diagnostics if the diagnostic would not intersect with the editor window
if (lineView.Right >= TextView.ViewportWidth - visualElement.DesiredSize.Width)
{
graphicsResult.Dispose();
continue;
}
Canvas.SetLeft(visualElement,
tag.Location == InlineDiagnosticsLocations.PlacedAtEndOfCode ? lineView.Right :
tag.Location == InlineDiagnosticsLocations.PlacedAtEndOfEditor ? TextView.ViewportRight - visualElement.DesiredSize.Width :
throw ExceptionUtilities.UnexpectedValue(tag.Location));
Canvas.SetTop(visualElement, lineView.Bottom - visualElement.DesiredSize.Height);
AdornmentLayer.AddAdornment(
behavior: AdornmentPositioningBehavior.TextRelative,
visualSpan: lineView.Extent,
tag: tag,
adornment: visualElement,
removedCallback: delegate { graphicsResult.Dispose(); });
}
}
