using System;
using System.Collections.Generic;
using System.Linq;
using CPF.Drawing;
using CPF.ReoGrid.Drawing;

namespace CPF.ReoGrid.Common
{
	internal sealed class ResourcePoolManager : IDisposable
	{
		internal ResourcePoolManager()
		{
		}

		public SolidColorBrush GetBrush(Color color)
		{
			bool flag = color.A == 0;
			SolidColorBrush result;
			if (flag)
			{
				result = null;
			}
			else
			{
				Dictionary<Color, SolidColorBrush> obj = this.cachedBrushes;
				lock (obj)
				{
					SolidColorBrush solidColorBrush;
					bool flag3 = this.cachedBrushes.TryGetValue(color, out solidColorBrush);
					if (flag3)
					{
						result = solidColorBrush;
					}
					else
					{
						solidColorBrush = new SolidColorBrush(color);
						this.cachedBrushes.Add(color, solidColorBrush);
						bool flag4 = this.cachedBrushes.Count % 10 == 0;
						if (flag4)
						{
							Logger.Log("resource pool", "solid brush count: " + this.cachedBrushes.Count.ToString());
						}
						result = solidColorBrush;
					}
				}
			}
			return result;
		}

		public CPFPen GetPen(Color color)
		{
			return this.GetPen(color, 1f, DashStyles.Solid);
		}

		public CPFPen GetPen(Color color, float weight, DashStyles style)
		{
			bool flag = color.A == 0;
			CPFPen result;
			if (flag)
			{
				result = null;
			}
			else
			{
				Dictionary<Color, List<CPFPen>> obj = this.cachedPens;
				CPFPen cpfpen;
				lock (obj)
				{
					List<CPFPen> list;
					bool flag3 = !this.cachedPens.TryGetValue(color, out list);
					if (flag3)
					{
						list = (this.cachedPens[color] = new List<CPFPen>());
						list.Add(cpfpen = new CPFPen(color, weight));
						cpfpen.DashStyle = style;
					}
					else
					{
						List<CPFPen> obj2 = list;
						lock (obj2)
						{
							cpfpen = list.FirstOrDefault((CPFPen p) => p.Stroke.Width == weight && p.DashStyle == style);
						}
						bool flag5 = cpfpen == null;
						if (flag5)
						{
							list.Add(cpfpen = new CPFPen(color, weight));
							cpfpen.DashStyle = style;
						}
					}
				}
				result = cpfpen;
			}
			return result;
		}

		public static Font CreateFont(string familyName, double emSizeD, FontStyles wfs)
		{
			float num = (float)emSizeD;
			return new Font(familyName, num * 96f / 72f, wfs);
		}

		public Font GetFont(string familyName, double emSizeD, FontStyles wfs)
		{
			bool flag = string.IsNullOrEmpty(familyName);
			if (flag)
			{
				familyName = "宋体";
			}
			return ResourcePoolManager.CreateFont(familyName, emSizeD, wfs);
		}

		internal void ReleaseAllResources()
		{
			int num = this.cachedPens.Count + this.cachedBrushes.Count;
			foreach (List<CPFPen> list in this.cachedPens.Values)
			{
				list.Clear();
			}
			this.cachedPens.Clear();
			this.cachedBrushes.Clear();
		}

		public void Dispose()
		{
			this.ReleaseAllResources();
		}

		private Dictionary<Color, SolidColorBrush> cachedBrushes = new Dictionary<Color, SolidColorBrush>();

		private Dictionary<Color, List<CPFPen>> cachedPens = new Dictionary<Color, List<CPFPen>>();

		internal class NoAvailableFontStyleException : Exception
		{
		}
	}
}