Dec2017-Script-Dump/UnityEngine/Experimental/UIElements/StyleSheets/StyleSheetCache.cs

using System;
using System.Collections.Generic;
using System.Reflection;
using UnityEngine.StyleSheets;

namespace UnityEngine.Experimental.UIElements.StyleSheets
{
	// Token: 0x0200036B RID: 875
	internal static class StyleSheetCache
	{
		// Token: 0x06003537 RID: 13623 RVA: 0x00058028 File Offset: 0x00056228
		static StyleSheetCache()
		{
			FieldInfo[] fields = typeof(VisualElementStyles).GetFields();
			foreach (FieldInfo fieldInfo in fields)
			{
				StylePropertyAttribute stylePropertyAttribute = (StylePropertyAttribute)Attribute.GetCustomAttribute(fieldInfo, typeof(StylePropertyAttribute));
				if (stylePropertyAttribute != null)
				{
					StyleSheetCache.s_NameToIDCache.Add(stylePropertyAttribute.propertyName, stylePropertyAttribute.propertyID);
				}
			}
		}

		// Token: 0x06003538 RID: 13624 RVA: 0x000580D0 File Offset: 0x000562D0
		internal static void ClearCaches()
		{
			StyleSheetCache.s_EnumToIntCache.Clear();
			StyleSheetCache.s_RulePropertyIDsCache.Clear();
		}

		// Token: 0x06003539 RID: 13625 RVA: 0x000580E8 File Offset: 0x000562E8
		internal static int GetEnumValue<T>(StyleSheet sheet, StyleValueHandle handle)
		{
			Debug.Assert(handle.valueType == StyleValueType.Enum);
			StyleSheetCache.SheetHandleKey sheetHandleKey = new StyleSheetCache.SheetHandleKey(sheet, handle.valueIndex);
			int num;
			if (!StyleSheetCache.s_EnumToIntCache.TryGetValue(sheetHandleKey, out num))
			{
				string text = sheet.ReadEnum(handle).Replace("-", string.Empty);
				object obj = Enum.Parse(typeof(T), text, true);
				num = (int)obj;
				StyleSheetCache.s_EnumToIntCache.Add(sheetHandleKey, num);
			}
			Debug.Assert(Enum.GetName(typeof(T), num) != null);
			return num;
		}

		// Token: 0x0600353A RID: 13626 RVA: 0x00058190 File Offset: 0x00056390
		internal static StylePropertyID[] GetPropertyIDs(StyleSheet sheet, int ruleIndex)
		{
			StyleSheetCache.SheetHandleKey sheetHandleKey = new StyleSheetCache.SheetHandleKey(sheet, ruleIndex);
			StylePropertyID[] array;
			if (!StyleSheetCache.s_RulePropertyIDsCache.TryGetValue(sheetHandleKey, out array))
			{
				StyleRule styleRule = sheet.rules[ruleIndex];
				array = new StylePropertyID[styleRule.properties.Length];
				for (int i = 0; i < array.Length; i++)
				{
					array[i] = StyleSheetCache.GetPropertyID(styleRule.properties[i].name);
				}
				StyleSheetCache.s_RulePropertyIDsCache.Add(sheetHandleKey, array);
			}
			return array;
		}

		// Token: 0x0600353B RID: 13627 RVA: 0x00058214 File Offset: 0x00056414
		private static StylePropertyID GetPropertyID(string name)
		{
			StylePropertyID stylePropertyID;
			if (!StyleSheetCache.s_NameToIDCache.TryGetValue(name, out stylePropertyID))
			{
				stylePropertyID = StylePropertyID.Custom;
			}
			return stylePropertyID;
		}

		// Token: 0x04000B89 RID: 2953
		private static StyleSheetCache.SheetHandleKeyComparer s_Comparer = new StyleSheetCache.SheetHandleKeyComparer();

		// Token: 0x04000B8A RID: 2954
		private static Dictionary<StyleSheetCache.SheetHandleKey, int> s_EnumToIntCache = new Dictionary<StyleSheetCache.SheetHandleKey, int>(StyleSheetCache.s_Comparer);

		// Token: 0x04000B8B RID: 2955
		private static Dictionary<StyleSheetCache.SheetHandleKey, StylePropertyID[]> s_RulePropertyIDsCache = new Dictionary<StyleSheetCache.SheetHandleKey, StylePropertyID[]>(StyleSheetCache.s_Comparer);

		// Token: 0x04000B8C RID: 2956
		private static Dictionary<string, StylePropertyID> s_NameToIDCache = new Dictionary<string, StylePropertyID>();

		// Token: 0x0200036C RID: 876
		private struct SheetHandleKey
		{
			// Token: 0x0600353C RID: 13628 RVA: 0x00058244 File Offset: 0x00056444
			public SheetHandleKey(StyleSheet sheet, int index)
			{
				this.sheetInstanceID = sheet.GetInstanceID();
				this.index = index;
			}

			// Token: 0x04000B8D RID: 2957
			public readonly int sheetInstanceID;

			// Token: 0x04000B8E RID: 2958
			public readonly int index;
		}

		// Token: 0x0200036D RID: 877
		private class SheetHandleKeyComparer : IEqualityComparer<StyleSheetCache.SheetHandleKey>
		{
			// Token: 0x0600353E RID: 13630 RVA: 0x00058264 File Offset: 0x00056464
			public bool Equals(StyleSheetCache.SheetHandleKey x, StyleSheetCache.SheetHandleKey y)
			{
				return x.sheetInstanceID == y.sheetInstanceID && x.index == y.index;
			}

			// Token: 0x0600353F RID: 13631 RVA: 0x000582A0 File Offset: 0x000564A0
			public int GetHashCode(StyleSheetCache.SheetHandleKey key)
			{
				return key.sheetInstanceID.GetHashCode() ^ key.index.GetHashCode();
			}
		}
	}
}