fix path

QuickLook.Common/Helpers/SettingHelper.cs

@@ -0,0 +1,116 @@
+// Copyright © 2018 Paddy Xu
+// 
+// This file is part of QuickLook program.
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.Serialization;
+using System.Xml;
+
+namespace QuickLook.Common.Helpers
+{
+    public class SettingHelper
+    {
+        public static readonly string LocalDataPath =
+            Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"pooi.moe\QuickLook\");
+
+        private static readonly Dictionary<string, XmlDocument> FileCache = new Dictionary<string, XmlDocument>();
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static T Get<T>(string id, T failsafe = default(T), Assembly calling = null)
+        {
+            if (!typeof(T).IsSerializable && !typeof(ISerializable).IsAssignableFrom(typeof(T)))
+                throw new InvalidOperationException("A serializable Type is required");
+
+            var file = Path.Combine(LocalDataPath,
+                (calling ?? Assembly.GetCallingAssembly()).GetName().Name + ".config");
+
+            var doc = GetConfigFile(file);
+
+            // try to get setting
+            var s = GetSettingFromXml(doc, id, failsafe);
+
+            return s != null ? s : failsafe;
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void Set(string id, object value, Assembly calling = null)
+        {
+            if (!value.GetType().IsSerializable)
+                throw new NotSupportedException("New value if not serializable.");
+
+            var file = Path.Combine(LocalDataPath,
+                (calling ?? Assembly.GetCallingAssembly()).GetName().Name + ".config");
+
+            WriteSettingToXml(GetConfigFile(file), id, value);
+        }
+
+        private static T GetSettingFromXml<T>(XmlDocument doc, string id, T failsafe)
+        {
+            var v = doc.SelectSingleNode($@"/Settings/{id}");
+            var result = v == null ? failsafe : (T) Convert.ChangeType(v.InnerText, typeof(T));
+
+            return result;
+        }
+
+        private static void WriteSettingToXml(XmlDocument doc, string id, object value)
+        {
+            var v = doc.SelectSingleNode($@"/Settings/{id}");
+
+            if (v != null)
+            {
+                v.InnerText = value.ToString();
+            }
+            else
+            {
+                var node = doc.CreateNode(XmlNodeType.Element, id, doc.NamespaceURI);
+                node.InnerText = value.ToString();
+                doc.SelectSingleNode(@"/Settings").AppendChild(node);
+            }
+
+            doc.Save(new Uri(doc.BaseURI).LocalPath);
+        }
+
+        private static XmlDocument GetConfigFile(string file)
+        {
+            if (FileCache.ContainsKey(file))
+                return FileCache[file];
+
+            Directory.CreateDirectory(Path.GetDirectoryName(file));
+            if (!File.Exists(file))
+                CreateNewConfig(file);
+
+            var doc = new XmlDocument();
+            doc.Load(file);
+            FileCache.Add(file, doc);
+            return doc;
+        }
+
+        private static void CreateNewConfig(string file)
+        {
+            using (var writer = XmlWriter.Create(file))
+            {
+                writer.WriteStartDocument();
+                writer.WriteStartElement("Settings");
+                writer.WriteEndElement();
+                writer.WriteEndDocument();
+            }
+        }
+    }
+}