void Update(HexBufferSpan span, ref HashSet <HexViewLine> checkedLines)
{
Debug.Assert(span.Buffer == wpfHexViewHost.HexView.Buffer);
var intersection = span.Intersection(wpfHexViewHost.HexView.HexViewLines.FormattedSpan);
if (intersection == null)
{
return;
}
var point = intersection.Value.Start;
while (point <= intersection.Value.End)
{
var line = wpfHexViewHost.HexView.WpfHexViewLines.GetWpfHexViewLineContainingBufferPosition(point);
if (line == null)
{
break;
}
if (checkedLines == null)
{
checkedLines = new HashSet <HexViewLine>();
}
if (!checkedLines.Contains(line))
{
checkedLines.Add(line);
Update(line);
}
if (line.IsLastDocumentLine())
{
break;
}
point = line.BufferEnd;
}
}
void Update(HexBufferSpan span, ref HashSet<HexViewLine> checkedLines) {
Debug.Assert(span.Buffer == wpfHexViewHost.HexView.Buffer);
var intersection = span.Intersection(wpfHexViewHost.HexView.HexViewLines.FormattedSpan);
if (intersection == null)
return;
var point = intersection.Value.Start;
while (point <= intersection.Value.End) {
var line = wpfHexViewHost.HexView.WpfHexViewLines.GetWpfHexViewLineContainingBufferPosition(point);
if (line == null)
break;
if (checkedLines == null)
checkedLines = new HashSet<HexViewLine>();
if (!checkedLines.Contains(line)) {
checkedLines.Add(line);
Update(line);
}
if (line.IsLastDocumentLine())
break;
point = line.BufferEnd;
}
}
bool Intersects(HexBufferSpan fullSpan, HexViewLine line, Rect rect) {
var span = fullSpan.Intersection(line.BufferSpan);
if (span == null || span.Value.Length == 0)
return false;
var allBounds = line.GetNormalizedTextBounds(span.Value, HexSpanSelectionFlags.Selection);
if (allBounds.Count == 0)
return false;
double left = double.MaxValue, right = double.MinValue, top = double.MaxValue, bottom = double.MinValue;
foreach (var bounds in allBounds) {
left = Math.Min(left, bounds.Left);
right = Math.Max(right, bounds.Right);
top = Math.Min(top, bounds.TextTop);
bottom = Math.Max(bottom, bounds.TextBottom);
}
left -= wpfHexView.ViewportLeft;
top -= wpfHexView.ViewportTop;
right -= wpfHexView.ViewportLeft;
bottom -= wpfHexView.ViewportTop;
bool b = left <= right && top <= bottom;
Debug.Assert(b);
if (!b)
return false;
var r = new Rect(left, top, right - left, bottom - top);
return r.IntersectsWith(rect);
}
