/// <summary>Sets up the bidirectional data.</summary>
public static void Setup()
{
if (Blocks != null)
{
return;
}
// Get the bidi data now:
#if UNITY
// Get the entity file:
UnityEngine.TextAsset bidiData = (UnityEngine.Resources.Load("BidirectionalData") as UnityEngine.TextAsset);
if (bidiData == null)
{
return;
}
byte[] file = bidiData.bytes;
// Create a reader:
BinaryIO.Reader reader = new BinaryIO.Reader(file);
int count = (int)reader.ReadCompressed();
Blocks = new BidiBlock[count];
int index = 0;
// Setup all blocks:
while (reader.More())
{
// Read the block:
Blocks[index++] = new BidiBlock(
(int)reader.ReadCompressed(),
(int)reader.ReadCompressed(),
reader.ReadByte()
);
}
#else
#warning Bidirectional data not available
#endif
}
/// <summary>Finds the nearest block for the given charcode and returns its mode.
/// The mode is one of the BidiBlock options.</summary>
public static int Get(int charCode)
{
if (Blocks == null)
{
// Always LTR:
return(BidiBlock.LeftToRight);
}
int min = 0;
int max = Blocks.Length - 1;
while (min <= max)
{
// Midpoint:
int mid = (min + max) / 2;
// Get that block:
BidiBlock nearest = Blocks[mid];
// Check:
if (charCode >= nearest.Start && charCode <= nearest.End)
{
return(nearest.Mode);
}
else if (charCode < nearest.Start)
{
max = mid - 1;
}
else
{
min = mid + 1;
}
}
// LTR otherwise:
return(BidiBlock.LeftToRight);
}