// From "Unity Editor Window Zooming" by Martin Ecker.
// http://martinecker.com/martincodes/unity-editor-window-zooming/

using UnityEngine;

namespace PixelCrushers
{

    // Helper Rect extension methods
    public static class RectExtensions
    {
        public static Vector2 TopLeft(this Rect rect)
        {
            return new Vector2(rect.xMin, rect.yMin);
        }
        public static Rect ScaleSizeBy(this Rect rect, float scale)
        {
            return rect.ScaleSizeBy(scale, rect.center);
        }
        public static Rect ScaleSizeBy(this Rect rect, float scale, Vector2 pivotPoint)
        {
            Rect result = rect;
            result.x -= pivotPoint.x;
            result.y -= pivotPoint.y;
            result.xMin *= scale;
            result.xMax *= scale;
            result.yMin *= scale;
            result.yMax *= scale;
            result.x += pivotPoint.x;
            result.y += pivotPoint.y;
            return result;
        }
        public static Rect ScaleSizeBy(this Rect rect, Vector2 scale)
        {
            return rect.ScaleSizeBy(scale, rect.center);
        }
        public static Rect ScaleSizeBy(this Rect rect, Vector2 scale, Vector2 pivotPoint)
        {
            Rect result = rect;
            result.x -= pivotPoint.x;
            result.y -= pivotPoint.y;
            result.xMin *= scale.x;
            result.xMax *= scale.x;
            result.yMin *= scale.y;
            result.yMax *= scale.y;
            result.x += pivotPoint.x;
            result.y += pivotPoint.y;
            return result;
        }
    }

}