/// <inheritdoc/>
public override VisualLineElement ConstructElement(int offset)
{
if (foldingManager == null)
{
return(null);
}
int foldedUntil = -1;
FoldingSection foldingSection = null;
foreach (FoldingSection fs in foldingManager.GetFoldingsAt(offset))
{
if (fs.IsFolded)
{
if (fs.EndOffset > foldedUntil)
{
foldedUntil = fs.EndOffset;
foldingSection = fs;
}
}
}
if (foldedUntil > offset && foldingSection != null)
{
// Handle overlapping foldings: if there's another folded folding
// (starting within the foldingSection) that continues after the end of the folded section,
// then we'll extend our fold element to cover that overlapping folding.
bool foundOverlappingFolding;
do
{
foundOverlappingFolding = false;
foreach (FoldingSection fs in FoldingManager.GetFoldingsContaining(foldedUntil))
{
if (fs.IsFolded && fs.EndOffset > foldedUntil)
{
foldedUntil = fs.EndOffset;
foundOverlappingFolding = true;
}
}
} while (foundOverlappingFolding);
string title = foldingSection.Title;
if (string.IsNullOrEmpty(title))
{
title = "...";
}
var p = new VisualLineElementTextRunProperties(CurrentContext.GlobalTextRunProperties);
p.SetForegroundBrush(textBrush);
var textFormatter = TextFormatterFactory.Create(CurrentContext.TextView);
var text = FormattedTextElement.PrepareText(textFormatter, title, p);
return(new FoldingLineElement(foldingSection, text, foldedUntil - offset)
{
textBrush = textBrush
});
}
else
{
return(null);
}
}
