public StyledString ToAscii(string value)
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
if (Encoding.UTF8.GetByteCount(value) != value.Length)
{
throw new ArgumentException("String contains non-ascii characters");
}
StringBuilder stringBuilder = new StringBuilder();
int stringWidth = Figlet.GetStringWidth(this.font, value);
char[,] characterGeometry = new char[this.font.Height + 1, stringWidth];
int[,] characterIndexGeometry = new int[this.font.Height + 1, stringWidth];
Color[,] colorGeometry = new Color[this.font.Height + 1, stringWidth];
for (int line = 1; line <= this.font.Height; line++)
{
int runningWidthTotal = 0;
for (int c = 0; c < value.Length; c++)
{
char character = value[c];
string fragment = Figlet.GetCharacter(this.font, character, line);
stringBuilder.Append(fragment);
Figlet.CalculateCharacterGeometries(fragment, c, runningWidthTotal, line, characterGeometry, characterIndexGeometry);
runningWidthTotal += fragment.Length;
}
stringBuilder.AppendLine();
}
StyledString styledString = new StyledString(value, stringBuilder.ToString());
styledString.CharacterGeometry = characterGeometry;
styledString.CharacterIndexGeometry = characterIndexGeometry;
styledString.ColorGeometry = colorGeometry;
return(styledString);
}
private static int GetStringWidth(FigletFont font, string value)
{
List <int> charWidths = new List <int>();
foreach (char character in value)
{
int charWidth = 0;
for (int line = 1; line <= font.Height; line++)
{
string figletCharacter = Figlet.GetCharacter(font, character, line);
charWidth = figletCharacter.Length > charWidth ? figletCharacter.Length : charWidth;
}
charWidths.Add(charWidth);
}
return(charWidths.Sum());
}