/// <summary>Constructor</summary>
/// <param name="text">String - The text to be coded</param>
/// <param name="size">XSize - The size of the bar code</param>
/// <param name="direction">CodeDirection - Indicates the direction to draw the bar code</param>
/// <param name="code128Code">Code_128_Code_Types - Indicates which of the codes to use when rendering the bar code.
/// <param name="isUCC">Set barcode to GS1 EAN/UCC</param>
/// The options are A, B, or buffer.</param>
public Code128(string text, XSize size, CodeDirection direction, Code128CodeType code128Code, bool isUCC)
: base(text, size, direction)
{
if (Patterns == null)
{
Load();
}
this.Code128Code = code128Code;
this.Text = text;
text = isUCC ? PrepareGS1Text(text) : text;
if (Code128Code == Code128CodeType.CodeC)
{
// Ensure that the text is an even length
//if ((text.Length % 2) == 1) throw new ArgumentOutOfRangeException("Parameter text (string) must have an even length for Code 128 - Code C");
if ((text.Length % 2) == 1)
{
text = "0" + text;
}
}
BarCode = ParseTextToBarCode(text);
CheckValues();
}
/// <summary>
/// Get start code
/// </summary>
/// <param name="text"></param>
/// <param name="type"></param>
/// <returns></returns>
private Code128CodeType GetStartCode(string text, Code128CodeType type)
{
if (type == Code128CodeType.Auto && GetNumberCount(text, 0) >= 2)
{
return(Code128CodeType.CodeC);
}
else if (type == Code128CodeType.Auto)
{
int firstValue = text[0];
if (firstValue < 32)
{
return(Code128CodeType.CodeA);
}
else
{
return(Code128CodeType.CodeB);
}
}
return(type);
}
/// <summary>Constructor</summary>
/// <param name="text">String - The text to be coded</param>
/// <param name="size">XSize - The size of the bar code</param>
/// <param name="direction">CodeDirection - Indicates the direction to draw the bar code</param>
/// <param name="code128Code">Code_128_Code_Types - Indicates which of the codes to use when rendering the bar code.</param>
public Code128(string text, XSize size, CodeDirection direction, Code128CodeType code128Code)
: this(text, size, direction, code128Code, false)
{
}
/// <summary>
/// TODO: Validate Application Identifiers (AI)
/// Parse text to raw data with start codes. Optimizes data if possible.
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
private string ParseTextToBarCode(string text)
{
Code128CodeType startCode = GetStartCode(text, Code128Code);
Code128CodeType currentCode = startCode;
string values = string.Empty;
values += (char)startCode;
int index = 0;
while (index < text.Length)
{
if (Code128Code == Code128CodeType.Auto &&
(currentCode == Code128CodeType.CodeA || currentCode == Code128CodeType.CodeB) &&
GetNumberCount(text, index) >= 4)
{
currentCode = Code128CodeType.CodeC;
values += CodeC;
continue;
}
int charNumber = text[index];
if (charNumber == FNC1)
{
values += FNC1;
index++;
continue;
}
if (currentCode == Code128CodeType.CodeA)
{
if (charNumber < 32)
{
values += (char)(charNumber + 64);
}
else if (charNumber >= 95)
{
currentCode = Code128CodeType.CodeB;
values += CodeB;
values += (char)(charNumber - 32);
}
else
{
values += (char)(charNumber - 32);
}
index++;
}
else if (currentCode == Code128CodeType.CodeB)
{
if (IsCharAType(charNumber))
{
currentCode = Code128CodeType.CodeA;
values += CodeA;
values += (char)(charNumber + 64);
}
else
{
values += (char)(charNumber - 32);
}
index++;
}
else if (currentCode == Code128CodeType.CodeC)
{
if (GetNumberCount(text, index) >= 2)
{
var valuePair = GetNumberPairChar(text, index);
values += valuePair.Value;
index += valuePair.Key;
}
else
{
if (IsCharAType(charNumber))
{
currentCode = Code128CodeType.CodeA;
values += CodeA;
values += (char)(charNumber + 64);
}
else
{
currentCode = Code128CodeType.CodeB;
values += CodeB;
values += (char)(charNumber - 32);
}
index++;
}
}
if (Code128Code != Code128CodeType.Auto && currentCode != startCode)
{
throw new Exception($"Invalid characters in barcode for CodeType at index {index}");
}
}
return(values.ToString());
}
