Add row and column accessors for tables and grids

src/Spectre.Console/Extensions/CalendarExtensions.cs

@@ -96,5 +96,37 @@ namespace Spectre.Console
             calendar.HeaderStyle = style ?? Style.Plain;
             return calendar;
         }
+
+        /// <summary>
+        /// Shows the calendar header.
+        /// </summary>
+        /// <param name="calendar">The calendar.</param>
+        /// <returns>The same instance so that multiple calls can be chained.</returns>
+        public static Calendar ShowHeader(this Calendar calendar)
+        {
+            if (calendar is null)
+            {
+                throw new ArgumentNullException(nameof(calendar));
+            }
+
+            calendar.ShowHeader = true;
+            return calendar;
+        }
+
+        /// <summary>
+        /// Hides the calendar header.
+        /// </summary>
+        /// <param name="calendar">The calendar.</param>
+        /// <returns>The same instance so that multiple calls can be chained.</returns>
+        public static Calendar HideHeader(this Calendar calendar)
+        {
+            if (calendar is null)
+            {
+                throw new ArgumentNullException(nameof(calendar));
+            }
+
+            calendar.ShowHeader = false;
+            return calendar;
+        }
     }
 }

src/Spectre.Console/Extensions/ColumnExtensions.cs

@@ -24,5 +24,24 @@ namespace Spectre.Console
             obj.NoWrap = true;
             return obj;
         }
+
+        /// <summary>
+        /// Sets the width of the column.
+        /// </summary>
+        /// <typeparam name="T">An object implementing <see cref="IColumn"/>.</typeparam>
+        /// <param name="obj">The column.</param>
+        /// <param name="width">The column width.</param>
+        /// <returns>The same instance so that multiple calls can be chained.</returns>
+        public static T Width<T>(this T obj, int? width)
+            where T : class, IColumn
+        {
+            if (obj is null)
+            {
+                throw new ArgumentNullException(nameof(obj));
+            }
+
+            obj.Width = width;
+            return obj;
+        }
     }
 }

src/Spectre.Console/Extensions/GridExtensions.cs

@@ -69,8 +69,8 @@ namespace Spectre.Console
                 throw new ArgumentNullException(nameof(grid));
             }
 
-            var columns = new IRenderable[grid.ColumnCount];
-            Enumerable.Range(0, grid.ColumnCount).ForEach(index => columns[index] = Text.Empty);
+            var columns = new IRenderable[grid.Columns.Count];
+            Enumerable.Range(0, grid.Columns.Count).ForEach(index => columns[index] = Text.Empty);
             grid.AddRow(columns);
 
             return grid;

src/Spectre.Console/Extensions/PaddableExtensions.cs

@@ -22,7 +22,7 @@ namespace Spectre.Console
                 throw new ArgumentNullException(nameof(obj));
             }
 
-            return Padding(obj, new Padding(left, obj.Padding.Top, obj.Padding.Right, obj.Padding.Bottom));
+            return Padding(obj, new Padding(left, obj.Padding.GetTopSafe(), obj.Padding.GetRightSafe(), obj.Padding.GetBottomSafe()));
         }
 
         /// <summary>
@@ -40,7 +40,7 @@ namespace Spectre.Console
                 throw new ArgumentNullException(nameof(obj));
             }
 
-            return Padding(obj, new Padding(obj.Padding.Left, top, obj.Padding.Right, obj.Padding.Bottom));
+            return Padding(obj, new Padding(obj.Padding.GetLeftSafe(), top, obj.Padding.GetRightSafe(), obj.Padding.GetBottomSafe()));
         }
 
         /// <summary>
@@ -58,7 +58,7 @@ namespace Spectre.Console
                 throw new ArgumentNullException(nameof(obj));
             }
 
-            return Padding(obj, new Padding(obj.Padding.Left, obj.Padding.Top, right, obj.Padding.Bottom));
+            return Padding(obj, new Padding(obj.Padding.GetLeftSafe(), obj.Padding.GetTopSafe(), right, obj.Padding.GetBottomSafe()));
         }
 
         /// <summary>
@@ -76,7 +76,7 @@ namespace Spectre.Console
                 throw new ArgumentNullException(nameof(obj));
             }
 
-            return Padding(obj, new Padding(obj.Padding.Left, obj.Padding.Top, obj.Padding.Right, bottom));
+            return Padding(obj, new Padding(obj.Padding.GetLeftSafe(), obj.Padding.GetTopSafe(), obj.Padding.GetRightSafe(), bottom));
         }
 
         /// <summary>

src/Spectre.Console/Extensions/PaddingExtensions.cs

@@ -0,0 +1,48 @@
+namespace Spectre.Console
+{
+    /// <summary>
+    /// Contains extension methods for <see cref="Padding"/>.
+    /// </summary>
+    public static class PaddingExtensions
+    {
+        /// <summary>
+        /// Gets the left padding.
+        /// </summary>
+        /// <param name="padding">The padding.</param>
+        /// <returns>The left padding or zero if <c>padding</c> is null.</returns>
+        public static int GetLeftSafe(this Padding? padding)
+        {
+            return padding?.Left ?? 0;
+        }
+
+        /// <summary>
+        /// Gets the right padding.
+        /// </summary>
+        /// <param name="padding">The padding.</param>
+        /// <returns>The right padding or zero if <c>padding</c> is null.</returns>
+        public static int GetRightSafe(this Padding? padding)
+        {
+            return padding?.Right ?? 0;
+        }
+
+        /// <summary>
+        /// Gets the top padding.
+        /// </summary>
+        /// <param name="padding">The padding.</param>
+        /// <returns>The top padding or zero if <c>padding</c> is null.</returns>
+        public static int GetTopSafe(this Padding? padding)
+        {
+            return padding?.Top ?? 0;
+        }
+
+        /// <summary>
+        /// Gets the bottom padding.
+        /// </summary>
+        /// <param name="padding">The padding.</param>
+        /// <returns>The bottom padding or zero if <c>padding</c> is null.</returns>
+        public static int GetBottomSafe(this Padding? padding)
+        {
+            return padding?.Bottom ?? 0;
+        }
+    }
+}

src/Spectre.Console/Extensions/TableExtensions.cs

@@ -36,6 +36,22 @@ namespace Spectre.Console
             return table;
         }
 
+        /// <summary>
+        /// Adds a row to the table.
+        /// </summary>
+        /// <param name="table">The table to add the row to.</param>
+        /// <param name="columns">The row columns to add.</param>
+        /// <returns>The same instance so that multiple calls can be chained.</returns>
+        public static Table AddRow(this Table table, params IRenderable[] columns)
+        {
+            if (table is null)
+            {
+                throw new ArgumentNullException(nameof(table));
+            }
+
+            return table.AddRow(columns);
+        }
+
         /// <summary>
         /// Adds an empty row to the table.
         /// </summary>
@@ -48,8 +64,8 @@ namespace Spectre.Console
                 throw new ArgumentNullException(nameof(table));
             }
 
-            var columns = new IRenderable[table.ColumnCount];
-            Enumerable.Range(0, table.ColumnCount).ForEach(index => columns[index] = Text.Empty);
+            var columns = new IRenderable[table.Columns.Count];
+            Enumerable.Range(0, table.Columns.Count).ForEach(index => columns[index] = Text.Empty);
             table.AddRow(columns);
             return table;
         }