/// <summary>
/// Initialize with an array of Unicode code points
/// </summary>
/// <param name="codePoints">The unicode code points to be processed</param>
/// <param name="paragraphEmbeddingLevel">The paragraph embedding level</param>
public void Init(Slice <int> codePoints, sbyte paragraphEmbeddingLevel)
{
// Set working buffer sizes
_types.Length = codePoints.Length;
_pairedBracketTypes.Length = codePoints.Length;
_pairedBracketValues.Length = codePoints.Length;
_paragraphPositions.Clear();
_paragraphEmbeddingLevel = paragraphEmbeddingLevel;
// Resolve the directionality, paired bracket type and paired bracket values for
// all code points
_hasBrackets = false;
_hasEmbeddings = false;
_hasIsolates = false;
for (int i = 0; i < codePoints.Length; i++)
{
var bidiData = UnicodeClasses.BidiData(codePoints[i]);
// Look up directionality
var dir = (Directionality)(bidiData >> 24);
_types[i] = dir;
switch (dir)
{
case Directionality.LRE:
case Directionality.LRO:
case Directionality.RLE:
case Directionality.RLO:
case Directionality.PDF:
_hasEmbeddings = true;
break;
case Directionality.LRI:
case Directionality.RLI:
case Directionality.FSI:
case Directionality.PDI:
_hasIsolates = true;
break;
}
// Lookup paired bracket types
var pbt = (PairedBracketType)((bidiData >> 16) & 0xFF);
_pairedBracketTypes[i] = pbt;
switch (pbt)
{
case PairedBracketType.o:
_pairedBracketValues[i] = MapCanon((int)(bidiData & 0xFFFF));
_hasBrackets = true;
break;
case PairedBracketType.c:
_pairedBracketValues[i] = MapCanon(codePoints[i]);
_hasBrackets = true;
break;
}
/*
* if (_types[i] == RichTextKit.Directionality.B)
* {
* _types[i] = (Directionality)Directionality.WS;
* _paragraphPositions.Add(i);
* }
*/
}
// Create slices on work buffers
Types = _types.AsSlice();
PairedBracketTypes = _pairedBracketTypes.AsSlice();
PairedBracketValues = _pairedBracketValues.AsSlice();
}
