printer-api/Instructions/TextInstruction.cs

using System.Runtime.Serialization;
using System.Text.Json.Serialization;
using ESCPOS_NET.Emitters;

public class TextInstruction : BaseInstruction
{
	[DataMember(IsRequired = true)]
	public string? text { get; set; }

	[JsonConverter(typeof(JsonStringEnumConverter))]
	public Alignment alignment {get; set; } = Alignment.Left;

	public bool underline {get; set; } = false;
	public bool bold {get; set; } = false;
	public bool doubleHeight {get; set; } = false;
	public bool doubleWidth {get; set; } = false;
	public bool fontB {get; set; } = false;
	public int lineSpacing {get; set; } = -1;

	public bool newLine { get; set; } = true;

	public override List<byte[]> GetInstructions()
	{
		var commands = new List<byte[]>();
		
		commands.Add(alignmentCommand(alignment));

		commands.AddRange(setStyles());

		if (lineSpacing >= 0){
			commands.Add(e.SetLineSpacingInDots(lineSpacing));
		}

		if (newLine)
		{
			commands.Add(e.PrintLine(text));
		}
		else
		{
			commands.Add(e.Print(text));
		}

		if (underline || bold || doubleHeight || doubleWidth || fontB){
			commands.Add(e.SetStyles(PrintStyle.None));
		}

		if (lineSpacing >= 0){
			commands.Add(e.ResetLineSpacing());
		}

		return commands;
	}

	private List<byte[]> setStyles(){
		var commands = new List<byte[]>();
		if (underline){
			commands.Add(e.SetStyles(PrintStyle.Underline));
		}

		if (bold){
			commands.Add(e.SetStyles(PrintStyle.Bold));
		}

		if (doubleHeight){
			commands.Add(e.SetStyles(PrintStyle.DoubleHeight));
		}

		if (doubleWidth){
			commands.Add(e.SetStyles(PrintStyle.DoubleWidth));
		}

		if (fontB){
			commands.Add(e.SetStyles(PrintStyle.FontB));
		}

		return commands;
	}
}