LineSeparatorElement TryCreateLineSeparatorElement(SnapshotSpan span, ILineSeparatorTag tag)
{
if (tag == null)
{
return(null);
}
var line = wpfTextView.TextViewLines.GetTextViewLineContainingBufferPosition(span.Start.TranslateTo(wpfTextView.TextSnapshot, PointTrackingMode.Negative));
if (line == null)
{
return(null);
}
if (tag.IsPhysicalLine)
{
while (!line.IsLastTextViewLineForSnapshotLine)
{
line = wpfTextView.TextViewLines.GetTextViewLineContainingBufferPosition(line.GetPointAfterLineBreak());
if (line == null)
{
return(null);
}
}
}
// Only one line separator per line
var lineIdentityTag = line.IdentityTag;
if (usedLines.Contains(lineIdentityTag))
{
return(null);
}
double yBottom = line.TextBottom + 1;
var elem = new LineSeparatorElement(new SnapshotSpan(line.Extent.Start, 0), yBottom, wpfTextView.ViewportWidth, lineSeparatorBrush, lineIdentityTag);
Canvas.SetTop(elem, elem.Y);
return(elem);
}
LineSeparatorElement TryCreateLineSeparatorElement(SnapshotSpan span, ILineSeparatorTag tag) {
if (tag == null)
return null;
var line = wpfTextView.TextViewLines.GetTextViewLineContainingBufferPosition(span.Start.TranslateTo(wpfTextView.TextSnapshot, PointTrackingMode.Negative));
if (line == null)
return null;
if (tag.IsPhysicalLine) {
while (!line.IsLastTextViewLineForSnapshotLine) {
line = wpfTextView.TextViewLines.GetTextViewLineContainingBufferPosition(line.GetPointAfterLineBreak());
if (line == null)
return null;
}
}
// Only one line separator per line
var lineIdentityTag = line.IdentityTag;
if (usedLines.Contains(lineIdentityTag))
return null;
double yBottom = line.TextBottom + 1;
var elem = new LineSeparatorElement(new SnapshotSpan(line.Extent.Start, 0), yBottom, wpfTextView.ViewportWidth, lineSeparatorBrush, lineIdentityTag);
Canvas.SetTop(elem, elem.Y);
return elem;
}
