public static int Each(string str, Func <char, bool> callback)
{
int n = 0;
DrawStringMode mode = DrawStringMode.Normal;
string fg = string.Empty;
string bg = string.Empty;
foreach (char c in str)
{
switch (mode)
{
case DrawStringMode.Normal:
if (c == '\x0000')
{
mode = DrawStringMode.ForegroundColor;
}
else
{
if (!callback(c))
{
return(n);
}
n++;
}
break;
case DrawStringMode.ForegroundColor:
if (char.IsNumber(c))
{
fg += c;
}
else if (c == ',')
{
mode = DrawStringMode.Background;
}
else if (c == ' ')
{
ushort foreground = ushort.MaxValue;
if (fg != string.Empty)
{
foreground = ushort.Parse(fg);
}
Curses.attron(ColorPair.From(foreground, ushort.MaxValue).Attribute);
fg = string.Empty;
mode = DrawStringMode.Normal;
}
else
{
throw new Exception("Malformed color string");
}
break;
case DrawStringMode.Background:
if (char.IsNumber(c))
{
bg += c;
}
else if (c == ' ')
{
Curses.attron(ColorPair.From(ushort.Parse(fg), ushort.Parse(bg)).Attribute);
fg = string.Empty;
bg = string.Empty;
mode = DrawStringMode.Normal;
}
else
{
throw new Exception("Malformed color string");
}
break;
}
}
return(n);
}
