aswi2021virtual-surreality-gitlab/deltarobot-vr-launcher/DeltaRobotVr.Launcher/LayoutRectangle.cs @ 8abb5582

using System.Drawing;

namespace DeltaRobotVr.Launcher
{
    
    /// <summary>
    /// A rectangle that allows creating layouts with subtractive methods.
    /// </summary>
    public struct LayoutRectangle
    {
        public int Top;
        public int Right;
        public int Bottom;
        public int Left;

        public int Width => Right - Left;
        public int Height => Bottom - Top;

        public LayoutRectangle(int top, int right, int bottom, int left)
        {
            Top = top;
            Right = right;
            Bottom = bottom;
            Left = left;
        }

        public LayoutRectangle(Rectangle rect) : this(rect.Top, rect.Right, rect.Bottom, rect.Left)
        {
        }

        public Rectangle ToRectangle() => new Rectangle(Left, Top, Right - Left, Bottom - Top);

        public LayoutRectangle RemoveFromTop(int value)
        {
            if (value > Height)
            {
                value = Height;
            }
            
            var result = new LayoutRectangle(Top, Right, Top + value, Left);
            Top += value;
            return result;
        }

        public LayoutRectangle RemoveFromRight(int value)
        {
            if (value > Width)
            {
                value = Width;
            }
            
            var result = new LayoutRectangle(Top, Right, Bottom, Right - value);
            Right -= value;
            return result;
        }

        public LayoutRectangle RemoveFromBottom(int value)
        {
            if (value > Height)
            {
                value = Height;
            }
            
            var result = new LayoutRectangle(Bottom - value, Right, Bottom, Left);
            Bottom -= value;
            return result;
        }

        public LayoutRectangle RemoveFromLeft(int value)
        {
            if (value > Width)
            {
                value = Width;
            }
            
            var result = new LayoutRectangle(Top, Left + value, Bottom, Left);
            Left += value;
            return result;
        }

        public LayoutRectangle Shrink(int value)
        {
            Top += value;
            Right -= value;
            Bottom -= value;
            Left += value;
            return this;
        }
    }
}