using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.UI;

namespace EasyLayout
{
	[RequireComponent(typeof(RectTransform))]
	[ExecuteInEditMode]
	public class EasyLayout : LayoutGroup
	{
		[SerializeField]
		public Anchors GroupPosition;

		[SerializeField]
		public Stackings Stacking;

		[SerializeField]
		public LayoutTypes LayoutType;

		[SerializeField]
		public HorizontalAligns RowAlign;

		[SerializeField]
		public InnerAligns InnerAlign;

		[SerializeField]
		public Anchors CellAlign;

		[SerializeField]
		public Vector2 Spacing = new Vector2(5f, 5f);

		[SerializeField]
		public bool Symmetric = true;

		[SerializeField]
		public Vector2 Margin = new Vector2(5f, 5f);

		[SerializeField]
		public Padding PaddingInner = default(Padding);

		[SerializeField]
		public float MarginTop = 5f;

		[SerializeField]
		public float MarginBottom = 5f;

		[SerializeField]
		public float MarginLeft = 5f;

		[SerializeField]
		public float MarginRight = 5f;

		[SerializeField]
		public bool RightToLeft;

		[SerializeField]
		public bool TopToBottom = true;

		[SerializeField]
		public bool SkipInactive = true;

		public Func<IEnumerable<GameObject>, IEnumerable<GameObject>> Filter;

		public ChildrenSize ChildrenWidth;

		public ChildrenSize ChildrenHeight;

		[SerializeField]
		[Obsolete("Use ChildrenWidth with ChildrenSize.SetPreferred instead.")]
		public bool ControlWidth;

		[Obsolete("Use ChildrenHeight with ChildrenSize.SetPreferred instead.")]
		[SerializeField]
		public bool ControlHeight;

		[SerializeField]
		[Obsolete("Use ChildrenWidth with ChildrenSize.SetMaxFromPreferred instead.")]
		public bool MaxWidth;

		[Obsolete("Use ChildrenHeight with ChildrenSize.SetMaxFromPreferred instead.")]
		[SerializeField]
		public bool MaxHeight;

		private Vector2 _blockSize;

		private Vector2 _uiSize;

		private static readonly Dictionary<Anchors, Vector2> groupPositions = new Dictionary<Anchors, Vector2>
		{
			{
				Anchors.LowerLeft,
				new Vector2(0f, 0f)
			},
			{
				Anchors.LowerCenter,
				new Vector2(0.5f, 0f)
			},
			{
				Anchors.LowerRight,
				new Vector2(1f, 0f)
			},
			{
				Anchors.MiddleLeft,
				new Vector2(0f, 0.5f)
			},
			{
				Anchors.MiddleCenter,
				new Vector2(0.5f, 0.5f)
			},
			{
				Anchors.MiddleRight,
				new Vector2(1f, 0.5f)
			},
			{
				Anchors.UpperLeft,
				new Vector2(0f, 1f)
			},
			{
				Anchors.UpperCenter,
				new Vector2(0.5f, 1f)
			},
			{
				Anchors.UpperRight,
				new Vector2(1f, 1f)
			}
		};

		private static readonly Dictionary<HorizontalAligns, float> rowAligns = new Dictionary<HorizontalAligns, float>
		{
			{
				HorizontalAligns.Left,
				0f
			},
			{
				HorizontalAligns.Center,
				0.5f
			},
			{
				HorizontalAligns.Right,
				1f
			}
		};

		private static readonly Dictionary<InnerAligns, float> innerAligns = new Dictionary<InnerAligns, float>
		{
			{
				InnerAligns.Top,
				0f
			},
			{
				InnerAligns.Middle,
				0.5f
			},
			{
				InnerAligns.Bottom,
				1f
			}
		};

		private float max_width = -1f;

		private float max_height = -1f;

		private DrivenRectTransformTracker propertiesTracker;

		[SerializeField]
		private int version;

		public Vector2 BlockSize
		{
			get
			{
				return _blockSize;
			}
			protected set
			{
				_blockSize = value;
			}
		}

		public Vector2 UISize
		{
			get
			{
				return _uiSize;
			}
			protected set
			{
				_uiSize = value;
			}
		}

		public override float minHeight
		{
			get
			{
				return BlockSize[1];
			}
		}

		public override float minWidth
		{
			get
			{
				return BlockSize[0];
			}
		}

		public override float preferredHeight
		{
			get
			{
				return BlockSize[1];
			}
		}

		public override float preferredWidth
		{
			get
			{
				return BlockSize[0];
			}
		}

		protected override void OnDisable()
		{
			propertiesTracker.Clear();
			base.OnDisable();
		}

		public void OnRectTransformRemoved()
		{
			SetDirty();
		}

		public override void SetLayoutHorizontal()
		{
			RepositionUIElements();
		}

		public override void SetLayoutVertical()
		{
		}

		public override void CalculateLayoutInputHorizontal()
		{
			base.CalculateLayoutInputHorizontal();
			CalculateLayoutSize();
		}

		public override void CalculateLayoutInputVertical()
		{
		}

		public float GetLength(RectTransform ui, bool scaled = true)
		{
			if (scaled)
			{
				return (Stacking != Stackings.Horizontal) ? ScaledHeight(ui) : ScaledWidth(ui);
			}
			return (Stacking != Stackings.Horizontal) ? ui.rect.height : ui.rect.width;
		}

		private float GetRowWidth(List<RectTransform> row)
		{
			return row.Select(ScaledWidth).Sum() + Spacing.x * (float)(row.Count - 1);
		}

		private float GetRowHeight(List<RectTransform> row)
		{
			return row.Select(ScaledHeight).Max() + Spacing.y;
		}

		private Vector2 CalculateGroupSize(List<List<RectTransform>> group)
		{
			float num;
			if (LayoutType == LayoutTypes.Compact)
			{
				num = group.Select(GetRowWidth).Max();
			}
			else
			{
				float[] maxColumnsWidths = GetMaxColumnsWidths(group);
				num = maxColumnsWidths.Sum() + (float)maxColumnsWidths.Length * Spacing.x - Spacing.x;
			}
			float num2 = group.Select(GetRowHeight).Sum() - Spacing.y;
			num += PaddingInner.Left + PaddingInner.Right;
			num2 += PaddingInner.Top + PaddingInner.Bottom;
			return new Vector2(num, num2);
		}

		public void NeedUpdateLayout()
		{
			UpdateLayout();
		}

		private void UpdateBlockSize()
		{
			if (Symmetric)
			{
				BlockSize = new Vector2(UISize.x + Margin.x * 2f, UISize.y + Margin.y * 2f);
			}
			else
			{
				BlockSize = new Vector2(UISize.x + MarginLeft + MarginRight, UISize.y + MarginLeft + MarginRight);
			}
		}

		public void CalculateLayoutSize()
		{
			List<List<RectTransform>> list = GroupUIElements();
			if (list.Count == 0)
			{
				UISize = new Vector2(0f, 0f);
				UpdateBlockSize();
			}
			else
			{
				UISize = CalculateGroupSize(list);
				UpdateBlockSize();
			}
		}

		public void RepositionUIElements()
		{
			List<List<RectTransform>> list = GroupUIElements();
			if (list.Count == 0)
			{
				UISize = new Vector2(0f, 0f);
				UpdateBlockSize();
				return;
			}
			UISize = CalculateGroupSize(list);
			UpdateBlockSize();
			Vector2 vector = groupPositions[GroupPosition];
			Vector2 startPosition = new Vector2(base.rectTransform.rect.width * (vector.x - base.rectTransform.pivot.x), base.rectTransform.rect.height * (vector.y - base.rectTransform.pivot.y));
			startPosition.x -= vector.x * UISize.x;
			startPosition.y += (1f - vector.y) * UISize.y;
			startPosition.x += GetMarginLeft() * ((1f - vector.x) * 2f - 1f);
			startPosition.y += GetMarginTop() * ((1f - vector.y) * 2f - 1f);
			startPosition.x += PaddingInner.Left;
			startPosition.y -= PaddingInner.Top;
			SetPositions(list, startPosition, UISize);
		}

		public void UpdateLayout()
		{
			CalculateLayoutInputHorizontal();
			RepositionUIElements();
		}

		private Vector2 GetUIPosition(RectTransform ui, Vector2 position, Vector2 align)
		{
			float num = ScaledWidth(ui) * ui.pivot.x;
			float num2 = ScaledHeight(ui) * ui.pivot.y;
			float x = position.x + num + align.x;
			float y = position.y - ScaledHeight(ui) + num2 - align.y;
			return new Vector2(x, y);
		}

		private List<float> GetRowsWidths(List<List<RectTransform>> group)
		{
			List<float> list = new List<float>();
			foreach (int item in Enumerable.Range(0, group.Count))
			{
				float num = group[item].Convert(ScaledWidth).Sum();
				list.Add(num + (float)(group[item].Count - 1) * Spacing.x);
			}
			return list;
		}

		private float GetMaxColumnWidth(List<RectTransform> column)
		{
			return column.Convert(ScaledWidth).Max();
		}

		private float[] GetMaxColumnsWidths(List<List<RectTransform>> group)
		{
			return Transpose(group).Select(GetMaxColumnWidth).ToArray();
		}

		private List<float> GetColumnsHeights(List<List<RectTransform>> group)
		{
			List<float> list = new List<float>();
			foreach (int item in Enumerable.Range(0, group.Count))
			{
				float num = group[item].Convert(ScaledHeight).Sum();
				list.Add(num + (float)(group[item].Count - 1) * Spacing.y);
			}
			return list;
		}

		private float GetMaxRowHeight(List<RectTransform> row)
		{
			return row.Select(ScaledHeight).Max();
		}

		private float[] GetMaxRowsHeights(List<List<RectTransform>> group)
		{
			return Transpose(group).Convert(GetMaxRowHeight).ToArray();
		}

		private Vector2 GetMaxCellSize(List<List<RectTransform>> group)
		{
			List<Vector2> source = group.Convert(GetMaxCellSize);
			return new Vector2(((IEnumerable<Vector2>)source).Max<Vector2, float>((Func<Vector2, float>)GetWidth), ((IEnumerable<Vector2>)source).Max<Vector2, float>((Func<Vector2, float>)GetHeight));
		}

		private float GetWidth(Vector2 size)
		{
			return size.x;
		}

		private float GetHeight(Vector2 size)
		{
			return size.y;
		}

		private Vector2 GetMaxCellSize(List<RectTransform> row)
		{
			return new Vector2(((IEnumerable<RectTransform>)row).Max<RectTransform, float>((Func<RectTransform, float>)ScaledWidth), ((IEnumerable<RectTransform>)row).Max<RectTransform, float>((Func<RectTransform, float>)ScaledHeight));
		}

		private Vector2 GetAlignByWidth(RectTransform ui, float maxWidth, Vector2 cellMaxSize, float emptyWidth)
		{
			if (LayoutType == LayoutTypes.Compact)
			{
				return new Vector2(emptyWidth * rowAligns[RowAlign], (cellMaxSize.y - ScaledHeight(ui)) * innerAligns[InnerAlign]);
			}
			Vector2 vector = groupPositions[CellAlign];
			return new Vector2((maxWidth - ScaledWidth(ui)) * vector.x, (cellMaxSize.y - ScaledHeight(ui)) * (1f - vector.y));
		}

		private Vector2 GetAlignByHeight(RectTransform ui, float maxHeight, Vector2 cellMaxSize, float emptyHeight)
		{
			if (LayoutType == LayoutTypes.Compact)
			{
				return new Vector2((cellMaxSize.x - ScaledWidth(ui)) * innerAligns[InnerAlign], emptyHeight * rowAligns[RowAlign]);
			}
			Vector2 vector = groupPositions[CellAlign];
			return new Vector2((cellMaxSize.x - ScaledWidth(ui)) * (1f - vector.x), (maxHeight - ScaledHeight(ui)) * vector.y);
		}

		private void SetPositions(List<List<RectTransform>> group, Vector2 startPosition, Vector2 groupSize)
		{
			Vector2 position = startPosition;
			if (Stacking == Stackings.Horizontal)
			{
				List<float> rowsWidths = GetRowsWidths(group);
				float[] maxColumnsWidths = GetMaxColumnsWidths(group);
				Vector2 vector = new Vector2(0f, 0f);
				int num = 0;
				{
					foreach (List<RectTransform> item in group)
					{
						Vector2 maxCellSize = GetMaxCellSize(item);
						int num2 = 0;
						foreach (RectTransform item2 in item)
						{
							vector = GetAlignByWidth(item2, maxColumnsWidths[num2], maxCellSize, groupSize.x - rowsWidths[num]);
							Vector2 uIPosition = GetUIPosition(item2, position, vector);
							if (item2.localPosition.x != uIPosition.x || item2.localPosition.y != uIPosition.y)
							{
								item2.localPosition = uIPosition;
							}
							position.x += ((LayoutType != LayoutTypes.Compact) ? maxColumnsWidths[num2] : ScaledWidth(item2)) + Spacing.x;
							num2++;
						}
						position.x = startPosition.x;
						position.y -= maxCellSize.y + Spacing.y;
						num++;
					}
					return;
				}
			}
			group = Transpose(group);
			List<float> columnsHeights = GetColumnsHeights(group);
			float[] maxRowsHeights = GetMaxRowsHeights(group);
			Vector2 vector2 = new Vector2(0f, 0f);
			int num3 = 0;
			foreach (List<RectTransform> item3 in group)
			{
				Vector2 maxCellSize2 = GetMaxCellSize(item3);
				int num4 = 0;
				foreach (RectTransform item4 in item3)
				{
					vector2 = GetAlignByHeight(item4, maxRowsHeights[num4], maxCellSize2, groupSize.y - columnsHeights[num3]);
					Vector2 uIPosition2 = GetUIPosition(item4, position, vector2);
					if (item4.localPosition.x != uIPosition2.x || item4.localPosition.y != uIPosition2.y)
					{
						item4.localPosition = uIPosition2;
					}
					position.y -= ((LayoutType != LayoutTypes.Compact) ? maxRowsHeights[num4] : ScaledHeight(item4)) + Spacing.y;
					num4++;
				}
				position.y = startPosition.y;
				position.x += maxCellSize2.x + Spacing.x;
				num3++;
			}
		}

		private void ResizeElements(List<RectTransform> elements)
		{
			propertiesTracker.Clear();
			if ((ChildrenWidth != ChildrenSize.DoNothing || ChildrenHeight != ChildrenSize.DoNothing) && elements != null && elements.Count != 0)
			{
				max_width = ((ChildrenWidth != ChildrenSize.SetMaxFromPreferred) ? (-1f) : elements.Select(GetPreferredWidth).Max());
				max_height = ((ChildrenHeight != ChildrenSize.SetMaxFromPreferred) ? (-1f) : elements.Select(GetPreferredHeight).Max());
				elements.ForEach(ResizeChild);
			}
		}

		public static float GetPreferredWidth(RectTransform rect)
		{
			if (rect == null)
			{
				return 1f;
			}
			if (rect.gameObject.activeInHierarchy)
			{
				return Mathf.Max(1f, LayoutUtility.GetPreferredWidth(rect));
			}
			float num = 1f;
			ILayoutElement[] components = rect.GetComponents<ILayoutElement>();
			int num2 = components.Max((ILayoutElement x) => x.layoutPriority);
			ILayoutElement[] array = components;
			foreach (ILayoutElement layoutElement in array)
			{
				if (layoutElement.layoutPriority == num2)
				{
					num = Mathf.Max(num, Mathf.Max(layoutElement.preferredWidth, layoutElement.minWidth));
				}
			}
			return num;
		}

		public static float GetPreferredHeight(RectTransform rect)
		{
			if (rect == null)
			{
				return 1f;
			}
			if (rect.gameObject.activeInHierarchy)
			{
				return Mathf.Max(1f, LayoutUtility.GetPreferredHeight(rect));
			}
			float num = 1f;
			ILayoutElement[] components = rect.GetComponents<ILayoutElement>();
			int num2 = components.Max((ILayoutElement x) => x.layoutPriority);
			ILayoutElement[] array = components;
			foreach (ILayoutElement layoutElement in array)
			{
				if (layoutElement.layoutPriority == num2)
				{
					num = Mathf.Max(num, Mathf.Max(layoutElement.preferredHeight, layoutElement.minHeight));
				}
			}
			return num;
		}

		public static float GetFlexibleWidth(RectTransform rect)
		{
			if (rect == null)
			{
				return 1f;
			}
			if (rect.gameObject.activeInHierarchy)
			{
				return Mathf.Max(1f, LayoutUtility.GetFlexibleWidth(rect));
			}
			float num = 1f;
			ILayoutElement[] components = rect.GetComponents<ILayoutElement>();
			int num2 = components.Max((ILayoutElement x) => x.layoutPriority);
			ILayoutElement[] array = components;
			foreach (ILayoutElement layoutElement in array)
			{
				if (layoutElement.layoutPriority == num2)
				{
					num = Mathf.Max(num, layoutElement.flexibleWidth);
				}
			}
			return num;
		}

		public static float GetFlexibleHeight(RectTransform rect)
		{
			if (rect == null)
			{
				return 1f;
			}
			if (rect.gameObject.activeInHierarchy)
			{
				return Mathf.Max(1f, LayoutUtility.GetFlexibleHeight(rect));
			}
			float num = 1f;
			ILayoutElement[] components = rect.GetComponents<ILayoutElement>();
			int num2 = components.Max((ILayoutElement x) => x.layoutPriority);
			ILayoutElement[] array = components;
			foreach (ILayoutElement layoutElement in array)
			{
				if (layoutElement.layoutPriority == num2)
				{
					num = Mathf.Max(num, layoutElement.flexibleHeight);
				}
			}
			return num;
		}

		private void ResizeChild(RectTransform child)
		{
			DrivenTransformProperties drivenTransformProperties = DrivenTransformProperties.None;
			if (ChildrenWidth != ChildrenSize.DoNothing)
			{
				drivenTransformProperties |= DrivenTransformProperties.SizeDeltaX;
				float size = ((max_width == -1f) ? GetPreferredWidth(child) : max_width);
				child.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, size);
			}
			if (ChildrenHeight != ChildrenSize.DoNothing)
			{
				drivenTransformProperties |= DrivenTransformProperties.SizeDeltaY;
				float size2 = ((max_height == -1f) ? GetPreferredHeight(child) : max_height);
				child.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, size2);
			}
			propertiesTracker.Add(this, child, drivenTransformProperties);
		}

		private bool IsIgnoreLayout(Transform rect)
		{
			ILayoutIgnorer component = rect.GetComponent<ILayoutIgnorer>();
			return component != null && component.ignoreLayout;
		}

		private List<RectTransform> GetUIElements()
		{
			List<RectTransform> list = base.rectChildren;
			if (!SkipInactive)
			{
				list = new List<RectTransform>();
				foreach (Transform item in base.transform)
				{
					if (!IsIgnoreLayout(item))
					{
						list.Add(item as RectTransform);
					}
				}
			}
			if (Filter != null)
			{
				IEnumerable<GameObject> source = Filter(list.Convert(GetGameObject));
				List<RectTransform> list2 = source.Select(GetRectTransform).ToList();
				ResizeElements(list2);
				return list2;
			}
			ResizeElements(list);
			return list;
		}

		private GameObject GetGameObject(RectTransform element)
		{
			return element.gameObject;
		}

		private RectTransform GetRectTransform(GameObject go)
		{
			return go.transform as RectTransform;
		}

		public float GetMarginTop()
		{
			return (!Symmetric) ? MarginTop : Margin.y;
		}

		public float GetMarginBottom()
		{
			return (!Symmetric) ? MarginBottom : Margin.y;
		}

		public float GetMarginLeft()
		{
			return (!Symmetric) ? MarginLeft : Margin.x;
		}

		public float GetMarginRight()
		{
			return (!Symmetric) ? MarginRight : Margin.y;
		}

		private void ReverseList(List<RectTransform> list)
		{
			list.Reverse();
		}

		private List<List<RectTransform>> GroupUIElements()
		{
			float length = GetLength(base.rectTransform, false);
			length -= ((Stacking != Stackings.Horizontal) ? (GetMarginTop() + GetMarginBottom()) : (GetMarginLeft() + GetMarginRight()));
			List<RectTransform> uIElements = GetUIElements();
			List<List<RectTransform>> list = ((LayoutType != LayoutTypes.Compact) ? EasyLayoutGrid.Group(uIElements, length, this) : EasyLayoutCompact.Group(uIElements, length, this));
			if (Stacking == Stackings.Vertical)
			{
				list = Transpose(list);
			}
			if (!TopToBottom)
			{
				list.Reverse();
			}
			if (RightToLeft)
			{
				list.ForEach(ReverseList);
			}
			float width = base.rectTransform.rect.width - (GetMarginLeft() + GetMarginRight());
			float height = base.rectTransform.rect.height - (GetMarginTop() + GetMarginBottom());
			if (LayoutType == LayoutTypes.Grid)
			{
				if (ChildrenWidth == ChildrenSize.FitContainer)
				{
					ResizeColumnWidthToFit(width, list);
				}
				if (ChildrenHeight == ChildrenSize.FitContainer)
				{
					ResizeRowHeightToFit(height, list);
				}
			}
			else if (Stacking == Stackings.Horizontal)
			{
				if (ChildrenWidth == ChildrenSize.FitContainer)
				{
					ResizeWidthToFit(width, list);
				}
				if (ChildrenHeight == ChildrenSize.FitContainer)
				{
					ResizeRowHeightToFit(height, list);
				}
			}
			else
			{
				if (ChildrenHeight == ChildrenSize.FitContainer)
				{
					ResizeHeightToFit(height, list);
				}
				if (ChildrenWidth == ChildrenSize.FitContainer)
				{
					ResizeColumnWidthToFit(width, list);
				}
			}
			return list;
		}

		private float GetRectWidth(RectTransform rect)
		{
			return rect.rect.width;
		}

		private float GetRectHeight(RectTransform rect)
		{
			return rect.rect.height;
		}

		private void ResizeWidthToFit(float width, List<List<RectTransform>> group)
		{
			foreach (List<RectTransform> item in group)
			{
				float num = width - item.SumFloat(GetRectWidth) - (float)(item.Count - 1) * Spacing.x;
				if (num <= 0f)
				{
					continue;
				}
				float num2 = num / item.SumFloat(GetFlexibleWidth);
				foreach (RectTransform item2 in item)
				{
					float num3 = GetFlexibleWidth(item2);
					item2.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, item2.rect.width + num2 * num3);
				}
			}
		}

		private float GetMaxPreferredWidth(List<RectTransform> row)
		{
			return ((IEnumerable<RectTransform>)row).Max<RectTransform, float>((Func<RectTransform, float>)GetPreferredWidth);
		}

		private float GetMaxFlexibleWidth(List<RectTransform> row)
		{
			return ((IEnumerable<RectTransform>)row).Max<RectTransform, float>((Func<RectTransform, float>)GetFlexibleWidth);
		}

		private void ResizeColumnWidthToFit(float width, List<List<RectTransform>> group)
		{
			List<List<RectTransform>> list = Transpose(group);
			List<float> list2 = list.Convert(GetMaxPreferredWidth);
			List<float> list3 = list.Convert(GetMaxFlexibleWidth);
			float num = width - list2.Sum() - (float)(list.Count - 1) * Spacing.x - PaddingInner.Left - PaddingInner.Right;
			if (num <= 0f)
			{
				return;
			}
			float num2 = num / list3.Sum();
			int num3 = 0;
			foreach (List<RectTransform> item in list)
			{
				foreach (RectTransform item2 in item)
				{
					item2.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, list2[num3] + num2 * list3[num3]);
				}
				num3++;
			}
		}

		private void ResizeHeightToFit(float height, List<List<RectTransform>> group)
		{
			foreach (List<RectTransform> item in Transpose(group))
			{
				float num = height - item.SumFloat(GetRectHeight) - (float)(item.Count - 1) * Spacing.y;
				if (num <= 0f)
				{
					continue;
				}
				float num2 = num / item.SumFloat(GetFlexibleHeight);
				foreach (RectTransform item2 in item)
				{
					float num3 = Mathf.Max(1f, GetFlexibleHeight(item2));
					item2.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, item2.rect.height + num2 * num3);
				}
			}
		}

		private float GetMaxPreferredHeight(List<RectTransform> column)
		{
			return ((IEnumerable<RectTransform>)column).Max<RectTransform, float>((Func<RectTransform, float>)GetPreferredWidth);
		}

		private float GetMaxFlexibleHeight(List<RectTransform> column)
		{
			return ((IEnumerable<RectTransform>)column).Max<RectTransform, float>((Func<RectTransform, float>)GetFlexibleHeight);
		}

		private void ResizeRowHeightToFit(float height, List<List<RectTransform>> group)
		{
			List<float> list = group.Convert(GetMaxPreferredHeight);
			List<float> list2 = group.Convert(GetMaxFlexibleHeight);
			float num = height - list.Sum() - (float)(group.Count - 1) * Spacing.y - PaddingInner.Top - PaddingInner.Bottom;
			if (num <= 0f)
			{
				return;
			}
			float num2 = num / list2.Sum();
			int num3 = 0;
			foreach (List<RectTransform> item in group)
			{
				foreach (RectTransform item2 in item)
				{
					item2.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, list[num3] + num2 * list2[num3]);
				}
				num3++;
			}
		}

		public static List<List<T>> Transpose<T>(List<List<T>> group)
		{
			List<List<T>> list = new List<List<T>>();
			int num = 0;
			foreach (List<T> item in group)
			{
				int num2 = 0;
				foreach (T item2 in item)
				{
					if (list.Count <= num2)
					{
						list.Add(new List<T>());
					}
					list[num2].Add(item2);
					num2++;
				}
				num++;
			}
			return list;
		}

		private static void Log(IEnumerable<float> values)
		{
			Debug.Log("[" + string.Join("; ", values.Select((float x) => x.ToString()).ToArray()) + "]");
		}

		private float ScaledWidth(RectTransform ui)
		{
			return ui.rect.width * ui.localScale.x;
		}

		private float ScaledHeight(RectTransform ui)
		{
			return ui.rect.height * ui.localScale.y;
		}

		protected override void Awake()
		{
			base.Awake();
			Upgrade();
		}

		public virtual void Upgrade()
		{
			if (version == 0)
			{
				if (ControlWidth)
				{
					ChildrenWidth = ((!MaxWidth) ? ChildrenSize.SetPreferred : ChildrenSize.SetMaxFromPreferred);
				}
				if (ControlHeight)
				{
					ChildrenHeight = ((!MaxHeight) ? ChildrenSize.SetPreferred : ChildrenSize.SetMaxFromPreferred);
				}
			}
			version = 1;
		}
	}
}