Support OSC 7 and OSC 9 ; 9 escape sequences for reporting the workin…

…g directory.

Closes #106.

src/core/Text/Control/ControlBuilder.cs

@@ -699,6 +699,21 @@ public ControlBuilder CloseHyperlink()
         return Print(OSC).Print("8;;").Print(ST);
     }
 
+    public ControlBuilder SetWorkingDirectory(Uri uri)
+    {
+        Check.Null(uri);
+        Check.Argument(uri.Scheme == Uri.UriSchemeFile, uri);
+
+        return Print(OSC).Print("7").Print(uri).Print(ST);
+    }
+
+    public ControlBuilder SetWorkingDirectory(scoped ReadOnlySpan<char> path)
+    {
+        Check.Argument(!path.IsEmpty, path);
+
+        return Print(OSC).Print("9;9;").Print("\"").Print(path).Print("\"").Print(ST);
+    }
+
     public ControlBuilder BeginShellPrompt()
     {
         return Print(OSC).Print("133;A").Print(ST);

src/core/Text/Control/ControlSequences.cs

@@ -367,6 +367,16 @@ public static string OpenHyperlink(Uri uri, scoped ReadOnlySpan<char> id = defau
         return Create(static (cb, id, uri) => cb.OpenHyperlink(uri, id), id, uri);
     }
 
+    public static string SetWorkingDirectory(Uri uri)
+    {
+        return Create(static (cb, uri) => cb.SetWorkingDirectory(uri), uri);
+    }
+
+    public static string SetWorkingDirectory(scoped ReadOnlySpan<char> path)
+    {
+        return Create(static (cb, path) => cb.SetWorkingDirectory(path), path);
+    }
+
     public static string CloseHyperlink()
     {
         return Create(static cb => cb.CloseHyperlink());