Add support for moving the cursor

src/Spectre.Console/Extensions/CursorExtensions.cs

@@ -0,0 +1,152 @@
+namespace Spectre.Console
+{
+    /// <summary>
+    /// Contains extension methods for <see cref="IAnsiConsoleCursor"/>.
+    /// </summary>
+    public static class CursorExtensions
+    {
+        /// <summary>
+        /// Shows the cursor.
+        /// </summary>
+        /// <param name="cursor">The cursor.</param>
+        public static void Show(this IAnsiConsoleCursor cursor)
+        {
+            if (cursor is null)
+            {
+                throw new System.ArgumentNullException(nameof(cursor));
+            }
+
+            cursor.Show(true);
+        }
+
+        /// <summary>
+        /// Hides the cursor.
+        /// </summary>
+        /// <param name="cursor">The cursor.</param>
+        public static void Hide(this IAnsiConsoleCursor cursor)
+        {
+            if (cursor is null)
+            {
+                throw new System.ArgumentNullException(nameof(cursor));
+            }
+
+            cursor.Show(false);
+        }
+
+        /// <summary>
+        /// Moves the cursor up.
+        /// </summary>
+        /// <param name="cursor">The cursor.</param>
+        public static void MoveUp(this IAnsiConsoleCursor cursor)
+        {
+            if (cursor is null)
+            {
+                throw new System.ArgumentNullException(nameof(cursor));
+            }
+
+            cursor.Move(CursorDirection.Up, 1);
+        }
+
+        /// <summary>
+        /// Moves the cursor up.
+        /// </summary>
+        /// <param name="cursor">The cursor.</param>
+        /// <param name="steps">The number of steps to move the cursor.</param>
+        public static void MoveUp(this IAnsiConsoleCursor cursor, int steps)
+        {
+            if (cursor is null)
+            {
+                throw new System.ArgumentNullException(nameof(cursor));
+            }
+
+            cursor.Move(CursorDirection.Up, steps);
+        }
+
+        /// <summary>
+        /// Moves the cursor down.
+        /// </summary>
+        /// <param name="cursor">The cursor.</param>
+        public static void MoveDown(this IAnsiConsoleCursor cursor)
+        {
+            if (cursor is null)
+            {
+                throw new System.ArgumentNullException(nameof(cursor));
+            }
+
+            cursor.Move(CursorDirection.Down, 1);
+        }
+
+        /// <summary>
+        /// Moves the cursor down.
+        /// </summary>
+        /// <param name="cursor">The cursor.</param>
+        /// <param name="steps">The number of steps to move the cursor.</param>
+        public static void MoveDown(this IAnsiConsoleCursor cursor, int steps)
+        {
+            if (cursor is null)
+            {
+                throw new System.ArgumentNullException(nameof(cursor));
+            }
+
+            cursor.Move(CursorDirection.Down, steps);
+        }
+
+        /// <summary>
+        /// Moves the cursor to the left.
+        /// </summary>
+        /// <param name="cursor">The cursor.</param>
+        public static void MoveLeft(this IAnsiConsoleCursor cursor)
+        {
+            if (cursor is null)
+            {
+                throw new System.ArgumentNullException(nameof(cursor));
+            }
+
+            cursor.Move(CursorDirection.Left, 1);
+        }
+
+        /// <summary>
+        /// Moves the cursor to the left.
+        /// </summary>
+        /// <param name="cursor">The cursor.</param>
+        /// <param name="steps">The number of steps to move the cursor.</param>
+        public static void MoveLeft(this IAnsiConsoleCursor cursor, int steps)
+        {
+            if (cursor is null)
+            {
+                throw new System.ArgumentNullException(nameof(cursor));
+            }
+
+            cursor.Move(CursorDirection.Left, steps);
+        }
+
+        /// <summary>
+        /// Moves the cursor to the right.
+        /// </summary>
+        /// <param name="cursor">The cursor.</param>
+        public static void MoveRight(this IAnsiConsoleCursor cursor)
+        {
+            if (cursor is null)
+            {
+                throw new System.ArgumentNullException(nameof(cursor));
+            }
+
+            cursor.Move(CursorDirection.Right, 1);
+        }
+
+        /// <summary>
+        /// Moves the cursor to the right.
+        /// </summary>
+        /// <param name="cursor">The cursor.</param>
+        /// <param name="steps">The number of steps to move the cursor.</param>
+        public static void MoveRight(this IAnsiConsoleCursor cursor, int steps)
+        {
+            if (cursor is null)
+            {
+                throw new System.ArgumentNullException(nameof(cursor));
+            }
+
+            cursor.Move(CursorDirection.Right, steps);
+        }
+    }
+}

src/Spectre.Console/Extensions/ExceptionExtensions.cs

@@ -1,4 +1,5 @@
 using System;
+using Spectre.Console.Internal;
 using Spectre.Console.Rendering;
 
 namespace Spectre.Console