internal static void ShapeToArabicDigitsWithContext(char[] dest, int start, int length, char digitBase, bool lastStrongWasAL)
{
digitBase -= '0'; // move common adjustment out of loop
int limit = start + length;
for (int i = start; i < limit; ++i)
{
char ch = dest[i];
switch (BidiOrder.GetDirection(ch))
{
case BidiOrder.L:
case BidiOrder.R:
lastStrongWasAL = false;
break;
case BidiOrder.AL:
lastStrongWasAL = true;
break;
case BidiOrder.EN:
if (lastStrongWasAL && ch <= '\u0039')
{
dest[i] = (char)(ch + digitBase);
}
break;
default:
break;
}
}
}
public bool GetParagraph(int runDirection)
{
RunDirection = runDirection;
CurrentChar = 0;
TotalTextLength = 0;
var hasText = false;
char c;
char uniC;
BaseFont bf;
for (; IndexChunk < Chunks.Count; ++IndexChunk)
{
var ck = (PdfChunk)Chunks[IndexChunk];
bf = ck.Font.Font;
var s = ck.ToString();
var len = s.Length;
for (; IndexChunkChar < len; ++IndexChunkChar)
{
c = s[IndexChunkChar];
uniC = (char)bf.GetUnicodeEquivalent(c);
if (uniC == '\r' || uniC == '\n')
{
// next condition is never true for CID
if (uniC == '\r' && IndexChunkChar + 1 < len && s[IndexChunkChar + 1] == '\n')
{
++IndexChunkChar;
}
++IndexChunkChar;
if (IndexChunkChar >= len)
{
IndexChunkChar = 0;
++IndexChunk;
}
hasText = true;
if (TotalTextLength == 0)
{
DetailChunks[0] = ck;
}
break;
}
AddPiece(c, ck);
}
if (hasText)
{
break;
}
IndexChunkChar = 0;
}
if (TotalTextLength == 0)
{
return(hasText);
}
// remove trailing WS
TotalTextLength = TrimRight(0, TotalTextLength - 1) + 1;
if (TotalTextLength == 0)
{
return(true);
}
if (runDirection == PdfWriter.RUN_DIRECTION_LTR || runDirection == PdfWriter.RUN_DIRECTION_RTL)
{
if (OrderLevels.Length < TotalTextLength)
{
OrderLevels = new byte[PieceSize];
IndexChars = new int[PieceSize];
}
ArabicLigaturizer.ProcessNumbers(Text, 0, TotalTextLength, ArabicOptions);
var order = new BidiOrder(Text, 0, TotalTextLength, (sbyte)(runDirection == PdfWriter.RUN_DIRECTION_RTL ? 1 : 0));
var od = order.GetLevels();
for (var k = 0; k < TotalTextLength; ++k)
{
OrderLevels[k] = od[k];
IndexChars[k] = k;
}
DoArabicShapping();
MirrorGlyphs();
}
TotalTextLength = TrimRightEx(0, TotalTextLength - 1) + 1;
return(true);
}
