Implementing the basic csharpier-ignore for xml

Src/CSharpier.Core/CSharp/CSharpFormatter.cs

@@ -150,6 +150,7 @@ bool TryGetCompilationFailure(out CodeFormatterResult compilationResult)
             var lineEnding = PrinterOptions.GetLineEnding(syntaxTree.ToString(), printerOptions);
             var printingContext = new PrintingContext
             {
+                NormalizedXml = string.Empty,
                 Options = new PrintingContext.PrintingContextOptions
                 {
                     LineEnding = lineEnding,
@@ -177,6 +178,7 @@ bool TryGetCompilationFailure(out CodeFormatterResult compilationResult)
 
                 var formattingContext2 = new PrintingContext
                 {
+                    NormalizedXml = string.Empty,
                     Options = new PrintingContext.PrintingContextOptions
                     {
                         LineEnding = lineEnding,

Src/CSharpier.Core/CSharp/SyntaxPrinter/CSharpierIgnore.cs

@@ -29,10 +29,22 @@ internal static partial class CSharpierIgnore
     public static readonly Regex IgnoreEndRegex = IgnoreEndRegexGenerator();
     public static readonly Regex WhiteSpaceLineEndingsRegex = WhiteSpaceLineEndingsGenerator();
 #else
-    private static readonly Regex IgnoreRegex = new("^// csharpier-ignore($| -)");
-    public static readonly Regex IgnoreStartRegex = new("^// csharpier-ignore-start($| -)");
-    public static readonly Regex IgnoreEndRegex = new("^// csharpier-ignore-end($| -)");
-    public static readonly Regex WhiteSpaceLineEndingsRegex = new(@"[\t\v\f ]*(\r\n?|\n)");
+    private static readonly Regex IgnoreRegex = new(
+        "^// csharpier-ignore($| -)",
+        RegexOptions.Compiled
+    );
+    public static readonly Regex IgnoreStartRegex = new(
+        "^// csharpier-ignore-start($| -)",
+        RegexOptions.Compiled
+    );
+    public static readonly Regex IgnoreEndRegex = new(
+        "^// csharpier-ignore-end($| -)",
+        RegexOptions.Compiled
+    );
+    public static readonly Regex WhiteSpaceLineEndingsRegex = new(
+        @"[\t\v\f ]*(\r\n?|\n)",
+        RegexOptions.Compiled
+    );
 #endif
 
     public static bool HasIgnoreComment(SyntaxNode syntaxNode) =>

Src/CSharpier.Core/CSharp/SyntaxPrinter/PrintingContext.cs

@@ -6,6 +6,7 @@ namespace CSharpier.Core.CSharp.SyntaxPrinter;
 
 internal class PrintingContext
 {
+    public required string NormalizedXml { get; init; }
     public required PrintingContextOptions Options { get; init; }
     public PrintingContextState State { get; } = new();
 

Src/CSharpier.Core/Xml/RawNode.cs

@@ -1,5 +1,6 @@
 using System.Text.Json.Serialization;
 using System.Xml;
+using CSharpier.Core.CSharp.SyntaxPrinter;
 
 namespace CSharpier.Core.Xml;
 
@@ -22,6 +23,9 @@ internal class RawNode
     public List<RawNode> Nodes { get; set; } = [];
     public string Value { get; set; } = string.Empty;
     public required XmlWhitespaceSensitivity XmlWhitespaceSensitivity { get; set; }
+    public int StartPosition { get; set; }
+    public int EndPosition { get; set; }
+    public CSharpierIgnoreType CSharpierIgnoreType { get; set; }
 
     public bool IsTextLike()
     {
@@ -58,3 +62,11 @@ public RawNode GetLastDescendant()
         return base.ToString();
     }
 }
+
+internal enum CSharpierIgnoreType
+{
+    None,
+    Ignore,
+    IgnoreStart,
+    IgnoreEnd,
+}