/******************************************************************************
 * Copyright (C) Ultraleap, Inc. 2011-2021.                                   *
 *                                                                            *
 * Use subject to the terms of the Apache License 2.0 available at            *
 * http://www.apache.org/licenses/LICENSE-2.0, or another agreement           *
 * between Ultraleap and you, your company or other organization.             *
 ******************************************************************************/

using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
#endif

namespace Leap.Unity
{

    public static class GuiRectUtil
    {

        public static Vector3 Corner00(this Rect rect)
        {
            return new Vector3(rect.x, rect.y);
        }

        public static Vector3 Corner10(this Rect rect)
        {
            return new Vector3(rect.x + rect.width, rect.y);
        }

        public static Vector3 Corner01(this Rect rect)
        {
            return new Vector3(rect.x, rect.y + rect.height);
        }

        public static Vector3 Corner11(this Rect rect)
        {
            return new Vector3(rect.x + rect.width, rect.y + rect.height);
        }

        public static Rect Encapsulate(this Rect rect, Vector2 point)
        {
            if (point.x < rect.x)
            {
                rect.width += rect.x - point.x;
                rect.x = point.x;
            }
            else if (point.x > rect.x + rect.width)
            {
                rect.width = point.x - rect.x;
            }

            if (point.y < rect.y)
            {
                rect.height += rect.y - point.y;
                rect.y = point.y;
            }
            else if (point.y > rect.y + rect.height)
            {
                rect.height = point.y - rect.y;
            }

            return rect;
        }

        public static void SplitHorizontally(this Rect rect, out Rect left, out Rect right)
        {
            left = rect;
            left.width /= 2;
            right = left;
            right.x += right.width;
        }

        public static void SplitHorizontallyWithRight(this Rect rect, out Rect left, out Rect right, float rightWidth)
        {
            left = rect;
            left.width -= rightWidth;
            right = left;
            right.x += right.width;
            right.width = rightWidth;
        }

        public static Rect NextLine(this Rect rect)
        {
            rect.y += rect.height;
            return rect;
        }

        public static Rect FromRight(this Rect rect, float width)
        {
            rect.x = rect.width - width;
            rect.width = width;
            return rect;
        }

#if UNITY_EDITOR
        public static Rect SingleLine(this Rect rect)
        {
            rect.height = EditorGUIUtility.singleLineHeight;
            return rect;
        }

        public static Rect Indent(this Rect rect)
        {
            rect.x += EditorGUIUtility.singleLineHeight;
            rect.width -= EditorGUIUtility.singleLineHeight;
            return rect;
        }
#endif
    }
}