105 lines
3.6 KiB
C#
105 lines
3.6 KiB
C#
/*
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* Copyright (c) 2014, Nick Gravelyn.
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*/
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using UnityEngine;
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using UnityEditor;
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using System;
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using System.Reflection;
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namespace TMPro
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{
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// Helpers used by the different sorting layer classes.
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public static class SortingLayerHelper
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{
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private static Type _utilityType;
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private static PropertyInfo _sortingLayerNamesProperty;
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private static MethodInfo _getSortingLayerUserIdMethod;
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static SortingLayerHelper()
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{
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_utilityType = Type.GetType("UnityEditorInternal.InternalEditorUtility, UnityEditor");
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_sortingLayerNamesProperty = _utilityType.GetProperty("sortingLayerNames", BindingFlags.Static | BindingFlags.NonPublic);
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_getSortingLayerUserIdMethod = _utilityType.GetMethod("GetSortingLayerUniqueID", BindingFlags.Static | BindingFlags.NonPublic);
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}
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// Gets an array of sorting layer names.
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// Since this uses reflection, callers should check for 'null' which will be returned if the reflection fails.
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public static string[] sortingLayerNames
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{
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get
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{
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if (_sortingLayerNamesProperty == null)
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{
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return null;
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}
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return _sortingLayerNamesProperty.GetValue(null, null) as string[];
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}
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}
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// Given the ID of a sorting layer, returns the sorting layer's name
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public static string GetSortingLayerNameFromID(int id)
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{
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string[] names = sortingLayerNames;
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if (names == null)
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{
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return null;
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}
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for (int i = 0; i < names.Length; i++)
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{
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if (GetSortingLayerIDForIndex(i) == id)
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{
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return names[i];
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}
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}
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return null;
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}
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// Given the name of a sorting layer, returns the ID.
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public static int GetSortingLayerIDForName(string name)
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{
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string[] names = sortingLayerNames;
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if (names == null)
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{
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return 0;
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}
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return GetSortingLayerIDForIndex(Array.IndexOf(names, name));
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}
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// Helper to convert from a sorting layer INDEX to a sorting layer ID. These are not the same thing.
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// IDs are based on the order in which layers were created and do not change when reordering the layers.
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// Thankfully there is a private helper we can call to get the ID for a layer given its index.
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public static int GetSortingLayerIDForIndex(int index)
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{
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if (_getSortingLayerUserIdMethod == null)
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{
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return 0;
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}
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return (int)_getSortingLayerUserIdMethod.Invoke(null, new object[] { index });
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}
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}
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} |