private ReadOnlyCollection <ITagSpan <IntraTextAdornmentTag> > GetTagsCore(SnapshotSpan span)
{
var list = new List <ITagSpan <IntraTextAdornmentTag> >();
var offset = span.Start.Position;
var snapshot = span.Snapshot;
for (var i = 0; i < span.Length; i++)
{
var position = i + offset;
var c = snapshot[position];
if (!ControlCharUtil.TryGetDisplayText(c, out string text))
{
continue;
}
UIElement adornment;
if (TryFindIndex(position, out int cacheIndex))
{
adornment = _adornmentCache[cacheIndex].Adornment;
}
else
{
var textRunProperties = _classificationFormatMap.DefaultTextProperties;
var typeface = textRunProperties.Typeface;
var fontSize = textRunProperties.FontRenderingEmSize;
var textHeight = _textView.LineHeight;
var textBlock = new TextBlock
{
Text = text,
Foreground = _foregroundBrush,
Background = Brushes.Transparent,
FontFamily = typeface.FontFamily,
FontStretch = typeface.Stretch,
FontWeight = typeface.Weight,
FontStyle = typeface.Style,
FontSize = fontSize,
Height = textHeight,
LineHeight = textHeight != 0 ? textHeight : double.NaN,
LineStackingStrategy = LineStackingStrategy.BlockLineHeight,
BaselineOffset = 0,
};
textBlock.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
adornment = textBlock;
_adornmentCache.Insert(cacheIndex, new AdornmentData(position, adornment));
}
var tag = new IntraTextAdornmentTag(adornment, null);
var adornmentSpan = new SnapshotSpan(snapshot, position, 1);
var tagSpan = new TagSpan <IntraTextAdornmentTag>(adornmentSpan, tag);
list.Add(tagSpan);
}
return(list.ToReadOnlyCollectionShallow());
}
private ReadOnlyCollection <ITagSpan <IntraTextAdornmentTag> > GetTagsCore(SnapshotSpan span)
{
var list = new List <ITagSpan <IntraTextAdornmentTag> >();
var offset = span.Start.Position;
var snapshot = span.Snapshot;
for (int i = 0; i < span.Length; i++)
{
var position = i + offset;
var c = snapshot[position];
string text;
if (!ControlCharUtil.TryGetDisplayText(c, out text))
{
continue;
}
UIElement adornment;
int cacheIndex;
if (TryFindIndex(position, out cacheIndex))
{
adornment = _adornmentCache[cacheIndex].Adornment;
}
else
{
var textBox = new TextBox();
textBox.Text = text;
textBox.BorderThickness = new Thickness(0);
textBox.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
textBox.Foreground = _foregroundBrush;
textBox.CaretBrush = _foregroundBrush;
textBox.FontWeight = FontWeights.Bold;
adornment = textBox;
_adornmentCache.Insert(cacheIndex, new AdornmentData(position, adornment));
}
var tag = new IntraTextAdornmentTag(adornment, null);
var adornmentSpan = new SnapshotSpan(snapshot, position, 1);
var tagSpan = new TagSpan <IntraTextAdornmentTag>(adornmentSpan, tag);
list.Add(tagSpan);
}
return(list.ToReadOnlyCollectionShallow());
}
