public static bool DoesSpanMultipleRows(IRowCol ItemRowCol, byte?AttrByte, int ShowLength)
{
bool doesSpan = false;
var showRowCol = ItemRowCol;
if (AttrByte != null)
{
showRowCol = ItemRowCol.Advance(1);
}
var endRowCol = showRowCol;
if (ShowLength > 0)
{
endRowCol = showRowCol.Advance(ShowLength - 1);
}
if (showRowCol.RowNum == endRowCol.RowNum)
{
doesSpan = false;
}
else
{
doesSpan = true;
}
return(doesSpan);
}
public RowColRange(IRowCol From, int Length)
{
this.From = From;
if (Length == 0)
{
this.To = From;
}
else
{
this.To = From.Advance(Length - 1);
}
}
/// <summary>
/// calc and return the end pos of the show text of the text data order.
/// </summary>
/// <param name="ShowRowCol"></param>
/// <returns></returns>
public IRowCol ShowEndRowCol(IRowCol ShowRowCol)
{
IRowCol endRowCol = null;
int lx = 0;
if (this.TextBytes != null)
{
lx = this.TextBytes.Length;
}
if (lx > 0)
{
endRowCol = ShowRowCol.Advance(lx - 1);
}
return(endRowCol);
}
public IRowCol ItemEndRowCol(IRowCol CurRowCol)
{
IRowCol endRowCol = null;
int lx = 0;
if (this.AttrByte != null)
{
lx = 1;
}
if (this.TextBytes != null)
{
lx += this.TextBytes.Length;
}
if (this.TailAttrByte != null)
{
lx += 1;
}
if (lx > 0)
{
endRowCol = CurRowCol.Advance(lx - 1);
}
return(endRowCol);
}
private static void CreateTextBlockSegments(
VisualSpanner Parent,
string Text, IRowCol StartRowCol, byte?AttrByte,
CanvasDefn CanvasDefn)
{
IRowCol rowCol = StartRowCol;
string text = Text;
int segNum = 0;
int segBx = 0;
// advance past attrByte.
#if skip
if (AttrByte != null)
{
rowCol = rowCol.Advance(1);
}
#endif
bool attrByteOccupySpace = true;
// loop create textblock segments until no more text.
while (text.Length > 0)
{
// space on this row.
var remLx = rowCol.GetRowRemaining();
if (attrByteOccupySpace == true)
{
remLx -= 1;
}
// text to place on current row.
int usedLx = 0;
if (remLx > text.Length)
{
usedLx = text.Length;
}
else
{
usedLx = remLx;
}
// create the textblock segment.
if (usedLx > 0)
{
segNum += 1;
var vtb = new VisualTextBlockSegment(
Parent, segNum, segBx,
Text.Substring(segBx, usedLx), rowCol as ZeroRowCol, AttrByte,
CanvasDefn, attrByteOccupySpace);
vtb.SetupUnderline();
Parent.SegmentList.Add(vtb);
// advance to next segment in show text.
segBx += usedLx;
if (text.Length > usedLx)
{
text = text.Substring(usedLx);
}
else
{
text = "";
}
}
// advance rowCol
if (attrByteOccupySpace == true)
{
usedLx += 1;
}
rowCol = rowCol.Advance(usedLx);
attrByteOccupySpace = false;
}
}
public static IRowCol AdvanceRight(this IRowCol RowCol)
{
var rowCol = RowCol.Advance(1);
return(rowCol);
}
public static IRowCol AdvanceLeft(this IRowCol RowCol)
{
var rowCol = RowCol.Advance(-1);
return(rowCol);
}
/// <summary>
/// advance the RowCol cursor based on the attribute bytes and show text of the
/// text data order.
/// </summary>
/// <param name="Current"></param>
/// <returns></returns>
public override IRowCol Advance(IRowCol Current)
{
var nextRowCol = Current.Advance(this.ItemLength());
return(nextRowCol);
}