/// <summary>
/// Generates the UnicodeTrie for the LineBreak code point ranges.
/// </summary>
public static void GenerateLineBreakTrie()
{
var regex = new Regex(@"^([0-9A-F]+)(?:\.\.([0-9A-F]+))?\s*;\s*(.*?)\s*#");
var builder = new UnicodeTrieBuilder((uint)LineBreakClass.XX);
using (StreamReader sr = GetStreamReader("LineBreak.txt"))
{
string line;
while ((line = sr.ReadLine()) != null)
{
Match match = regex.Match(line);
if (match.Success)
{
var start = match.Groups[1].Value;
var end = match.Groups[2].Value;
var point = match.Groups[3].Value;
if (end?.Length == 0)
{
end = start;
}
builder.SetRange(int.Parse(start, NumberStyles.HexNumber), int.Parse(end, NumberStyles.HexNumber), (uint)Enum.Parse <LineBreakClass>(point), true);
}
}
}
UnicodeTrie trie = builder.Freeze();
using FileStream stream = GetStreamWriter("LineBreak.trie");
trie.Save(stream);
}
public static void GenerateTrieClass(string name, UnicodeTrie trie)
{
var stream = new MemoryStream();
trie.Save(stream);
using (var fileStream = File.Create($"Generated\\{name}.trie.cs"))
using (var writer = new StreamWriter(fileStream))
{
writer.WriteLine("using System;");
writer.WriteLine("namespace Avalonia.Media.TextFormatting.Unicode");
writer.WriteLine("{");
writer.WriteLine($" internal static class {name}Trie");
writer.WriteLine(" {");
writer.WriteLine(" public static ReadOnlySpan<byte> Data => new byte[]");
writer.WriteLine(" {");
stream.Position = 0;
writer.Write(" ");
long length = stream.Length;
while (true)
{
var b = stream.ReadByte();
if (b == -1)
{
break;
}
writer.Write(b.ToString());
if (stream.Position % 100 > 0 && stream.Position != length)
{
writer.Write(", ");
}
else
{
writer.Write(',');
writer.Write(Environment.NewLine);
if (stream.Position != length)
{
writer.Write(" ");
}
}
}
writer.WriteLine(" };");
writer.WriteLine(" }");
writer.WriteLine("}");
}
}
