fix: improve printing for text with new line character

Author: cpa-coder

src/Sharprinter.Demo.Cli/Commands/PrinterHelper.cs

@@ -6,8 +6,7 @@ public static Task PrintAsync(this PrinterContext context)
     {
         return context
             .AddImage(@".\Assets\image.jpg", x => x.Filename("7-ELEVEN Logo"))
-            .AddText("123 Main St. Springfield, USA", x => x.Alignment(HorizontalAlignment.Center))
-            .AddText("VATREG 123456789000", x => x.Alignment(HorizontalAlignment.Center))
+            .AddText("123 Main St. Springfield, USA\nVATREG 123456789000", x => x.Alignment(HorizontalAlignment.Center))
             .FeedLine()
             .AddText("INVOICE", x => x.Alignment(HorizontalAlignment.Center).TextSize(TextSize.DoubleHeight))
             .FeedLine()

src/Sharprinter/PrinterContext.cs

@@ -71,6 +71,11 @@ public PrinterContext AddText(string data, Action<IText>? action = null)
     /// </returns>
     public PrinterContext AddSeparator(char character = '─')
     {
+        if (character is '\n' or '\r')
+        {
+            throw new ArgumentException("Separator character cannot be a newline or carriage return.", nameof(character));
+        }
+
         var separator = new string(character, _options.MaxLineCharacter);
         Printer.PrintText(separator);
         return this;

src/Sharprinter/Tables/RowItem.cs

@@ -46,13 +46,13 @@ internal sealed class RowItem : IRowItem
 
     public RowItem(string data, int maxLength)
     {
-        _data = data;
+        _data = data.Replace("\n", " ").Replace("\r", " "); //sanitize
         MaxLength = maxLength;
     }
 
     public RowItem(string data)
     {
-        _data = data;
+        _data = data.Replace("\n", " ").Replace("\r", " "); //sanitize
         MaxLength = null;
     }
 

src/Sharprinter/Text.cs

@@ -52,7 +52,13 @@ public IText TextSize(TextSize size)
 
     internal PrinterContext Add()
     {
-        context.Printer.PrintText(text, _textWrap, _alignment, _textSize);
+        var lines = text.Split('\n');
+
+        foreach (var line in lines)
+        {
+            context.Printer.PrintText(line, _textWrap, _alignment, _textSize);
+        }
+
         return context;
     }
 }