From 05888e5ec9dee23ce0fb1beecfc866a19fa0a2e8 Mon Sep 17 00:00:00 2001
From: Michael Becker <alcexhim@gmail.com>
Date: Wed, 2 Sep 2020 12:32:49 -0400
Subject: [PATCH] add IsEmpty, Equals, ==, and != operators to Padding

---
 MBS.Framework/Drawing/Padding.cs | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/MBS.Framework/Drawing/Padding.cs b/MBS.Framework/Drawing/Padding.cs
index 56e6689..7cb70e0 100644
--- a/MBS.Framework/Drawing/Padding.cs
+++ b/MBS.Framework/Drawing/Padding.cs
@@ -7,6 +7,11 @@ namespace MBS.Framework.Drawing
 {
 	public struct Padding
 	{
+		public static Padding Empty;
+
+		private bool _IsNotEmpty;
+		public bool IsEmpty { get { return !_IsNotEmpty; } }
+
 		private int mvarLeft;
 		public int Left { get { return mvarLeft; } set { mvarLeft = value; } }
 		private int mvarTop;
@@ -16,6 +21,31 @@ namespace MBS.Framework.Drawing
 		private int mvarBottom;
 		public int Bottom { get { return mvarBottom; } set { mvarBottom = value; } }
 
+		public override bool Equals(object obj)
+		{
+			if (obj is Padding)
+			{
+				return (Padding)obj == this;
+			}
+			return false;
+		}
+		public static bool operator==(Padding left, Padding right)
+		{
+			return ((left.IsEmpty == right.IsEmpty)
+				&& (left.Left == right.Left)
+				&& (left.Right == right.Right)
+				&& (left.Top == right.Top)
+				&& (left.Bottom == right.Bottom));
+		}
+		public static bool operator !=(Padding left, Padding right)
+		{
+			return (!((left.IsEmpty == right.IsEmpty)
+				&& (left.Left == right.Left)
+				&& (left.Right == right.Right)
+				&& (left.Top == right.Top)
+				&& (left.Bottom == right.Bottom)));
+		}
+
 		public int All
 		{
 			get
@@ -38,6 +68,7 @@ namespace MBS.Framework.Drawing
 			mvarLeft = all;
 			mvarRight = all;
 			mvarTop = all;
+			_IsNotEmpty = true;
 		}
 		public Padding(int top, int bottom, int left, int right)
 		{
@@ -45,6 +76,7 @@ namespace MBS.Framework.Drawing
 			mvarLeft = left;
 			mvarRight = right;
 			mvarTop = top;
+			_IsNotEmpty = true;
 		}
 	}
 }