private void EraseRange(RtAbsRange range)
{
Debug.Assert(range.FirstCharPos >= 0, "range.FirstCharPos >= 0");
Debug.Assert(range.LastCharPos < text.LayoutTextLength);
var lastCharAbsPos = range.LastCharPos;
while (lastCharAbsPos >= range.FirstCharPos)
{
EraseChar(lastCharAbsPos);
lastCharAbsPos--;
}
}
public IEnumerable <AaRectangle2> GetSelectionRectangles(RtAbsRange range)
{
GetLspanFor(range.FirstCharPos, out var lspan1, out var lspanIndex1, out var charIndex1);
GetLspanFor(range.LastCharPos + 1, out var lspan2, out var lspanIndex2, out var charIndex2);
var startCorner = lspan1.Bounds.MinMin + new Vector2(lspan1.GetCharOffset(charIndex1), 0);
var endCorner = lspan2.Bounds.MinMax + new Vector2(lspan2.GetCharOffset(charIndex2), 0);
if (lspanIndex1 == lspanIndex2)
{
yield return(new AaRectangle2(startCorner, endCorner));
yield break;
}
yield return(new AaRectangle2(startCorner, lspan1.Bounds.MaxMax));
for (var i = lspanIndex1 + 1; i < lspanIndex2; i++)
{
yield return(LayoutSpans[i].Bounds);
}
yield return(new AaRectangle2(lspan2.Bounds.MinMin, endCorner));
}