/// <summary>
/// Restore the data saved by SaveTypes
/// </summary>
public void RestoreTypes()
{
_classes.Clear();
_classes.Add(_savedClasses.AsSlice());
_pairedBracketTypes.Clear();
_pairedBracketTypes.Add(_savedPairedBracketTypes.AsSlice());
}
/// <summary>
/// Appends text to the bidi data.
/// </summary>
/// <param name="text">The text to process.</param>
public void Append(ReadOnlySlice <char> text)
{
_classes.Add(text.Length);
_pairedBracketTypes.Add(text.Length);
_pairedBracketValues.Add(text.Length);
// Resolve the BidiCharacterType, paired bracket type and paired
// bracket values for all code points
HasBrackets = false;
HasEmbeddings = false;
HasIsolates = false;
int i = Length;
var codePointEnumerator = new CodepointEnumerator(text);
while (codePointEnumerator.MoveNext())
{
var codepoint = codePointEnumerator.Current;
// Look up BiDiClass
var dir = codepoint.BiDiClass;
_classes[i] = dir;
switch (dir)
{
case BidiClass.LeftToRightEmbedding:
case BidiClass.LeftToRightOverride:
case BidiClass.RightToLeftEmbedding:
case BidiClass.RightToLeftOverride:
case BidiClass.PopDirectionalFormat:
{
HasEmbeddings = true;
break;
}
case BidiClass.LeftToRightIsolate:
case BidiClass.RightToLeftIsolate:
case BidiClass.FirstStrongIsolate:
case BidiClass.PopDirectionalIsolate:
{
HasIsolates = true;
break;
}
}
// Lookup paired bracket types
var pbt = codepoint.PairedBracketType;
_pairedBracketTypes[i] = pbt;
if (pbt == BidiPairedBracketType.Open)
{
// Opening bracket types can never have a null pairing.
codepoint.TryGetPairedBracket(out var paired);
_pairedBracketValues[i] = (int)Codepoint.GetCanonicalType(paired).Value;
HasBrackets = true;
}
else if (pbt == BidiPairedBracketType.Close)
{
_pairedBracketValues[i] = (int)Codepoint.GetCanonicalType(codepoint).Value;
HasBrackets = true;
}
i++;
}
Length = i;
Classes = _classes.AsSlice(0, Length);
PairedBracketTypes = _pairedBracketTypes.AsSlice(0, Length);
PairedBracketValues = _pairedBracketValues.AsSlice(0, Length);
}
