public CrayonString(CrayonColor color, string text) : this(new CrayonToken()
{
Color = color,
Text = text
})
{
}
public CrayonToken(string text, CrayonColor color) {
this.Text = text;
this.Color = color;
}
internal static List<CrayonToken> Parse(string text)
{
//escape escape chars
//text = text.Replace(escapeStart, $"{escapeStart}{escapeEnd}");
// make sure to start with a default color, otherwise, regex won't capture text until some color definition
var defColor = $"{escapeStart}d{escapeEnd}";
if (!text.StartsWith(defColor)) text = defColor + text;
if (!text.EndsWith(defColor)) text = text + defColor;
var pattern = new Regex($"{escapeStart}(?<color>[a-zA-Z]*?){escapeEnd}");
var matches = pattern.Matches(text);
var result = new List<CrayonToken>(matches.Count > 0 ? matches.Count - 1 : 0);
var curColor = new CrayonColor("d");
for (int i = 1; i < matches.Count; i++)
{
var m = matches[i];
var colorName = matches[i - 1].Groups["color"].Value;
//empty color name means escaped escape char
var isEscaped = string.IsNullOrEmpty(colorName);
var color = !isEscaped ? new CrayonColor(colorName) : curColor;
curColor = color;
var start = matches[i - 1].Captures[0].Index + matches[i - 1].Captures[0].Length;
var end = m.Captures[0].Index;
var tokenText = text.Substring(start, end - start);
if (isEscaped) tokenText = EscapeChar + tokenText;
result.Add(new CrayonToken()
{
Color = color,
Text = tokenText
});
}
return result;
}