decodeColor static method

Color? decodeColor(dynamic value, { bool validate = true, })

Decodes a given value into a color. A value of null will result in null being returned.

This supports the following formats:

• rgb
• rrggbb
• aarrggbb
• #rgb
• #rrggbb
• #aarrggbb

Implementation

static Color? decodeColor(
  dynamic value, {
  bool validate = true,
}) {
  Color? result;

  if (value is Color) {
    result = value;
  } else if (value != null) {
    assert(SchemaValidator.validate(
      schemaId: '$_baseSchemaUrl/color',
      value: value,
      validate: validate,
    ));
    var i = 0;

    if (value?.startsWith('#') == true) {
      value = value.substring(1);
    }

    if (value?.length == 3) {
      value = value.substring(0, 1) +
          value.substring(0, 1) +
          value.substring(1, 2) +
          value.substring(1, 2) +
          value.substring(2, 3) +
          value.substring(2, 3);
    }

    if (value?.length == 6 || value?.length == 8) {
      i = int.parse(value, radix: 16);

      if (value?.length != 8) {
        i = 0xff000000 + i;
      }

      result = Color(i);
    }
  }

  return result;
}