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204 行
5.8 KiB
204 行
5.8 KiB
using System;
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using System.IO;
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using UnityEngine;
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#if UNITY_EDITOR
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using UnityEditor;
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#endif
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namespace VRMShaders
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{
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/// <summary>
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/// UniGLTF.UnityPath (Assets の ひとつ上がルート) をすべてのパスが扱えるように拡張するのが趣旨。
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/// readonly struct で Immutable であるという主張。
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/// </summary>
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public readonly struct PathObject
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{
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/// <summary>
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/// * Delemeter は / を保証
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/// * .. を解決済み
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/// * フルパス
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/// * 末尾に / を付けない
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/// </summary>
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public string FullPath { get; }
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public string Extension => Path.GetExtension(FullPath);
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public string Stem => Path.GetFileNameWithoutExtension(FullPath);
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public PathObject Parent => FromFullPath(Path.GetDirectoryName(FullPath));
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public bool IsUnderAsset => IsDescendantOf(UnityAssets);
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public bool Exists => System.IO.File.Exists(FullPath);
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/// <summary>
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/// AssetDatabase の引き数になるパスを想定。
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/// Assets のひとつ上を 基準とする相対パス。
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/// Application.dataPath は Assets を得る。
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/// </summary>
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/// <returns></returns>
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public string UnityAssetPath
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{
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get
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{
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var root = UnityRoot;
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if (!IsDescendantOf(UnityRoot))
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{
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throw new ArgumentException($"{FullPath} is not under UnityAssetPath");
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}
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return FullPath.Substring(root.FullPath.Length + 1);
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}
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}
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public static PathObject UnityRoot { get; } = FromFullPath(Path.GetDirectoryName(Application.dataPath));
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// 記述順に解決?
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public static PathObject UnityAssets { get; } = UnityRoot.Child("Assets/");
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PathObject(string src)
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{
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if (string.IsNullOrEmpty(src))
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{
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throw new ArgumentNullException();
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}
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src = Path.GetFullPath(src).Replace('\\', '/');
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if (src.Length > 1 && src[src.Length - 1] == '/')
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{
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// drop last /
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src = src.Substring(0, src.Length - 1);
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}
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if (src[0] == '/')
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{
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FullPath = src;
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}
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else
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{
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if (src.Length >= 3 && src[1] == ':' && src[2] == '/')
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{
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FullPath = src;
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}
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else
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{
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throw new ArgumentException($"{src} is not fullpath");
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}
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}
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}
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public override string ToString()
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{
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try
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{
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var assetPath = UnityAssetPath;
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return $"<unity:{assetPath}>";
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}
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catch (ArgumentException)
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{
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return $"<file:{FullPath}>";
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}
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}
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/// <param name="src">start with "X:/" on Windows else "/"</param>
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/// <returns></returns>
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public static PathObject FromFullPath(string src)
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{
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return new PathObject(src);
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}
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/// <param name="src">AssetDatabase が使うパス</param>
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/// <returns></returns>
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public static PathObject FromUnityAssetPath(string src)
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{
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return UnityRoot.Child(src);
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}
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public static bool TryGetFromEnvironmentVariable(string key, out PathObject dst)
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{
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var value = System.Environment.GetEnvironmentVariable(key);
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if (string.IsNullOrEmpty(value))
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{
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dst = default;
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return false;
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}
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dst = PathObject.FromFullPath(value);
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return true;
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}
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public PathObject Child(string child)
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{
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return FromFullPath(Path.Combine(FullPath, child));
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}
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public bool IsDescendantOf(PathObject ascendant)
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{
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if (!FullPath.StartsWith(ascendant.FullPath))
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{
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return false;
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}
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if (FullPath.Length <= ascendant.FullPath.Length || FullPath[ascendant.FullPath.Length] != '/')
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{
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return false;
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}
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return true;
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}
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public byte[] ReadAllBytes()
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{
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return File.ReadAllBytes(FullPath);
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}
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public void WriteAllBytes(byte[] data)
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{
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File.WriteAllBytes(FullPath, data);
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}
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#if UNITY_EDITOR
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public static bool TryGetFromAsset(UnityEngine.Object src, out PathObject dst)
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{
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if (src == null)
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{
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dst = default;
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return false;
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}
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var assetPath = AssetDatabase.GetAssetPath(src);
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if (!string.IsNullOrEmpty(assetPath))
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{
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dst = FromUnityAssetPath(assetPath);
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return true;
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}
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var prefab = PrefabUtility.GetPrefabAssetPathOfNearestInstanceRoot(src);
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if (!string.IsNullOrEmpty(prefab))
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{
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dst = FromUnityAssetPath(prefab);
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return true;
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}
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dst = default;
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return false;
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}
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public void ImportAsset()
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{
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AssetDatabase.ImportAsset(UnityAssetPath);
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}
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public bool TrySaveDialog(string title, string name, out PathObject dst)
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{
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var path = EditorUtility.SaveFilePanel(
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title,
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FullPath,
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name,
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"vrm");
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if (string.IsNullOrEmpty(path))
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{
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dst = default;
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return false;
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}
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dst = PathObject.FromFullPath(path);
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return true;
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}
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#endif
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}
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}
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