void textView_VisualLineConstructionStarting(object sender, VisualLineConstructionStartEventArgs e)
{
IHighlighter highlighter = ((TextView)sender).Services.GetService(typeof(IHighlighter)) as IHighlighter;
if (highlighter != null)
{
// Force update of highlighting state up to the position where we start generating visual lines.
// This is necessary in case the document gets modified above the FirstLineInView so that the highlighting state changes.
// We need to detect this case and issue a redraw (through TextViewDocumentHighligher.OnHighlightStateChanged)
// before the visual line construction reuses existing lines that were built using the invalid highlighting state.
lineNumberBeingColorized = e.FirstLineInView.LineNumber - 1;
highlighter.GetSpanStack(lineNumberBeingColorized);
lineNumberBeingColorized = 0;
}
}
void textView_VisualLineConstructionStarting(object sender, VisualLineConstructionStartEventArgs e)
{
if (highlighter != null) {
// Force update of highlighting state up to the position where we start generating visual lines.
// This is necessary in case the document gets modified above the FirstLineInView so that the highlighting state changes.
// We need to detect this case and issue a redraw (through OnHighlightStateChanged)
// before the visual line construction reuses existing lines that were built using the invalid highlighting state.
lineNumberBeingColorized = e.FirstLineInView.LineNumber - 1;
if (!isInHighlightingGroup) {
// avoid opening group twice if there was an exception during the previous visual line construction
// (not ideal, but better than throwing InvalidOperationException "group already open"
// without any way of recovering)
highlighter.BeginHighlighting();
isInHighlightingGroup = true;
}
highlighter.UpdateHighlightingState(lineNumberBeingColorized);
lineNumberBeingColorized = 0;
}
}
