/// <summary>
/// Remove the glyphs covered by <paramref name="snapshotSpan"/>.
/// It should only be called by UI thread because UI elements are manipulated by this method.
/// </summary>
public void RemoveGlyphs(SnapshotSpan snapshotSpan)
{
AssertIsForeground();
var glyphDataToRemove = _glyphDataTree.GetIntervalsThatIntersectWith(snapshotSpan.Start, snapshotSpan.Length);
foreach (var(_, glyph) in glyphDataToRemove)
{
_glyphsContainer.Children.Remove(glyph);
}
var remainingGlyphData = _glyphDataTree.Except(glyphDataToRemove).ToImmutableArray();
_glyphDataTree.ClearInPlace();
foreach (var glyphData in remainingGlyphData)
{
_glyphDataTree.AddIntervalInPlace(glyphData);
}
}