Japanese translation was updated

Update ja.po

docs/changelog.md

@@ -1,4 +1,6 @@
 
+- The Japanese translation was updated. Thanks to the translators!
+
 # v7.1.2.0 (2026-01-09)
 
 - libmpv updated to v0.41 2026-01-09.

lang/po/ja.po

@@ -583,7 +583,7 @@ msgstr "再生履歴"
 #: D:\Projects\CS\mpv.net\src\MpvNet\InputHelp.cs:140
 #: D:\Projects\CS\mpv.net\src\MpvNet\InputHelp.cs:245
 msgid "Watch Later"
-msgstr "後で再生"
+msgstr "再生位置を保存"
 
 #: D:\Projects\CS\mpv.net\src\MpvNet\InputHelp.cs:142
 msgid "Console"
@@ -818,7 +818,7 @@ msgstr "ハードウェアデコードの切り替え"
 
 #: D:\Projects\CS\mpv.net\src\MpvNet\InputHelp.cs:188
 msgid "Exit Watch Later"
-msgstr "後で再生を解除"
+msgstr "再生位置を保存して終了"
 
 #: D:\Projects\CS\mpv.net\src\MpvNet\InputHelp.cs:190
 #: D:\Projects\CS\mpv.net\src\MpvNet.Windows\WinForms\MainForm.cs:477

src/MpvNet.Windows/Conf.cs

@@ -1,5 +1,5 @@
 
-using MpvNet.ExtensionMethod;
+using MpvNet.Extensions;
 
 namespace MpvNet.Windows;
 

src/MpvNet.Windows/GuiCommand.cs

@@ -7,7 +7,7 @@ using System.Windows.Forms;
 using System.Windows.Interop;
 using System.Windows;
 
-using MpvNet.ExtensionMethod;
+using MpvNet.Extensions;
 using MpvNet.Windows.WinForms;
 using MpvNet.Windows.WPF.Views;
 using MpvNet.Windows.WPF;
@@ -303,20 +303,20 @@ public class GuiCommand
 
         if (File.Exists(path) && osd)
         {
-            if (FileTypes.IsAudio(path.Ext()))
+            if (FileTypes.IsAudio(path.Ext))
             {
                 text = Player.GetPropertyOsdString("filtered-metadata");
                 Player.CommandV("show-text", text, "5000");
                 return;
             }
-            else if (FileTypes.IsImage(path.Ext()))
+            else if (FileTypes.IsImage(path.Ext))
             {
                 fileSize = new FileInfo(path).Length;
 
                 text = "Width: " + Player.GetPropertyInt("width") + "\n" +
                        "Height: " + Player.GetPropertyInt("height") + "\n" +
                        "Size: " + Convert.ToInt32(fileSize / 1024.0) + " KB\n" +
-                       "Type: " + path.Ext().ToUpper();
+                       "Type: " + path.Ext.ToUpper();
 
                 Player.CommandV("show-text", text, "5000");
                 return;
@@ -332,7 +332,7 @@ public class GuiCommand
             int width = Player.GetPropertyInt("video-params/w");
             int height = Player.GetPropertyInt("video-params/h");
             TimeSpan len = TimeSpan.FromSeconds(Player.GetPropertyDouble("duration"));
-            text = path.FileName() + "\n";
+            text = path.FileName + "\n";
             text += FormatTime(len.TotalMinutes) + ":" + FormatTime(len.Seconds) + "\n";
             if (fileSize > 0)
                 text += Convert.ToInt32(fileSize / 1024.0 / 1024.0) + " MB\n";

src/MpvNet.Windows/UI/GlobalHotkey.cs

@@ -2,7 +2,7 @@
 using System.ComponentModel;
 using System.Runtime.InteropServices;
 
-using MpvNet.ExtensionMethod;
+using MpvNet.Extensions;
 
 namespace MpvNet.Windows.UI;
 

src/MpvNet.Windows/WinForms/MainForm.cs

@@ -10,7 +10,7 @@ using System.Text.RegularExpressions;
 using MpvNet.Windows.WPF;
 using MpvNet.Windows.UI;
 using MpvNet.Help;
-using MpvNet.ExtensionMethod;
+using MpvNet.Extensions;
 using MpvNet.MVVM;
 using MpvNet.Windows.WPF.MsgBox;
 
@@ -556,12 +556,12 @@ public partial class MainForm : Form
         if (App.AutofitImage > 1)
             App.AutofitImage = 1;
 
-        bool isAudio = FileTypes.IsAudio(Player.Path.Ext());
+        bool isAudio = FileTypes.IsAudio(Player.Path.Ext);
         
         if (isAudio)
             autoFitHeight = Convert.ToInt32(workingArea.Height * App.AutofitAudio);
 
-        if (FileTypes.IsImage(Player.Path.Ext()))
+        if (FileTypes.IsImage(Player.Path.Ext))
             autoFitHeight = Convert.ToInt32(workingArea.Height * App.AutofitImage);
 
         if (Player.VideoSize.Height == 0 || Player.VideoSize.Width == 0)

src/MpvNet/App.cs

@@ -1,7 +1,7 @@
 
 using CommunityToolkit.Mvvm.Messaging;
 
-using MpvNet.ExtensionMethod;
+using MpvNet.Extensions;
 using MpvNet.Help;
 using MpvNet.MVVM;
 

src/MpvNet/Chapter.cs

@@ -1,5 +1,5 @@
 
-using MpvNet.ExtensionMethod;
+using MpvNet.Extensions;
 
 namespace MpvNet;
 

src/MpvNet/ExtensionLoader.cs

@@ -1,7 +1,7 @@
 
 using System.Reflection;
 
-using MpvNet.ExtensionMethod;
+using MpvNet.Extensions;
 
 namespace MpvNet;
 
@@ -34,7 +34,7 @@ public class ExtensionLoader
         {
             foreach (string dir in Directory.GetDirectories(path))
             {
-                LoadDll(dir.AddSep() + Path.GetFileName(dir) + ".dll");
+                LoadDll(dir.Separator + Path.GetFileName(dir) + ".dll");
             }
         }
     }

src/MpvNet/ExtensionMethod/ObjectExtension.cs

@@ -1,7 +0,0 @@
-
-namespace MpvNet.ExtensionMethod;
-
-public static class ObjectExtension
-{
-    public static string ToStringEx(this object instance) => instance?.ToString() ?? "";
-}

src/MpvNet/ExtensionMethod/ObjectExtensions.cs

@@ -0,0 +1,10 @@
+
+namespace MpvNet.Extensions;
+
+public static class ObjectExtensions
+{
+    extension(object instance)
+    {
+        public string ToStringEx() => instance?.ToString() ?? "";
+    }
+}

src/MpvNet/ExtensionMethod/PathStringExtension.cs

@@ -1,67 +0,0 @@
-
-namespace MpvNet.ExtensionMethod;
-
-public static class PathStringExtension
-{
-    public static string Ext(this string filepath) => filepath.Ext(false);
-
-    public static string Ext(this string filepath, bool includeDot)
-    {
-        if (string.IsNullOrEmpty(filepath))
-            return "";
-
-        char[] chars = filepath.ToCharArray();
-
-        for (int x = filepath.Length - 1; x >= 0; x--)
-        {
-            if (chars[x] == Path.DirectorySeparatorChar)
-                return "";
-
-            if (chars[x] == '.')
-                return filepath.Substring(x + (includeDot ? 0 : 1)).ToLowerInvariant();
-        }
-
-        return "";
-    }
-
-    public static string FileName(this string instance)
-    {
-        if (string.IsNullOrEmpty(instance))
-            return "";
-
-        int index = instance.LastIndexOf('\\');
-
-        if (index > -1)
-            return instance[(index + 1)..];
-
-        index = instance.LastIndexOf('/');
-
-        if (index > -1)
-            return instance[(index + 1)..];
-
-        return instance;
-    }
-
-    public static string ShortPath(this string instance, int maxLength)
-    {
-        if (string.IsNullOrEmpty(instance))
-            return "";
-
-        if (instance.Length > maxLength && instance.Substring(1, 2) == ":\\")
-            instance = instance[..3] + "...\\" + instance.FileName();
-
-        return instance;
-    }
-
-    // Ensure trailing directory separator char
-    public static string AddSep(this string instance)
-    {
-        if (string.IsNullOrEmpty(instance))
-            return "";
-
-        if (!instance.EndsWith(Path.DirectorySeparatorChar.ToString()))
-            instance = instance + Path.DirectorySeparatorChar;
-
-        return instance;
-    }
-}

src/MpvNet/ExtensionMethod/PathStringExtensions.cs

@@ -0,0 +1,77 @@
+
+namespace MpvNet.Extensions;
+
+public static class PathStringExtensions
+{
+    extension(string filepath)
+    {
+        public string Ext => GetExt(filepath, false);
+
+        static string GetExt(string path, bool includeDot)
+        {
+            if (string.IsNullOrEmpty(path))
+                return "";
+
+            char[] chars = path.ToCharArray();
+
+            for (int x = path.Length - 1; x >= 0; x--)
+            {
+                if (chars[x] == '/')
+                    return "";
+                if (chars[x] == '\\')
+                    return "";
+                if (chars[x] == '.')
+                    return path[(x + (includeDot ? 0 : 1))..].ToLowerInvariant();
+            }
+
+            return "";
+        }
+
+        public string FileName
+        {
+            get
+            {
+                if (string.IsNullOrEmpty(filepath))
+                    return "";
+
+                int index = filepath.LastIndexOf('\\');
+
+                if (index > -1)
+                    return filepath[(index + 1)..];
+
+                index = filepath.LastIndexOf('/');
+
+                if (index > -1)
+                    return filepath[(index + 1)..];
+
+                return filepath;
+            }
+        }
+
+        public string ShortPath(int maxLength)
+        {
+            if (string.IsNullOrEmpty(filepath))
+                return "";
+
+            if (filepath.Length > maxLength && filepath.Substring(1, 2) == ":\\")
+                filepath = $"{filepath[..3]}...\\{filepath.FileName}";
+
+            return filepath;
+        }
+
+        // Ensure trailing directory separator char
+        public string Separator
+        {
+            get
+            {
+                if (string.IsNullOrEmpty(filepath))
+                    return "";
+
+                if (!filepath.EndsWith(Path.DirectorySeparatorChar.ToString()))
+                    filepath = filepath + Path.DirectorySeparatorChar;
+
+                return filepath;
+            }
+        }
+    }
+}

src/MpvNet/ExtensionMethod/StringExtensions.cs

@@ -1,15 +1,15 @@
 
 using System.Globalization;
 
-namespace MpvNet.ExtensionMethod;
+namespace MpvNet.Extensions;
 
-public static class StringExtension
+public static class StringExtensions
 {
-    public static string ToUpperEx(this string instance) => (instance != null) ? instance.ToUpperInvariant() : "";
+    public static string ToUpperEx(this string instance) => instance?.ToUpperInvariant() ?? "";
 
-    public static string ToLowerEx(this string instance) => (instance != null) ? instance.ToLowerInvariant() : "";
+    public static string ToLowerEx(this string instance) => instance?.ToLowerInvariant() ?? "";
 
-    public static string TrimEx(this string? instance) => (instance == null) ? "" : instance.Trim();
+    public static string TrimEx(this string? instance) => instance?.Trim() ?? "";
 
     public static int ToInt(this string instance, int defaultValue = 0)
     {

src/MpvNet/FileTypes.cs

@@ -1,5 +1,5 @@
 
-using MpvNet.ExtensionMethod;
+using MpvNet.Extensions;
 
 namespace MpvNet;
 
@@ -49,5 +49,5 @@ public static class FileTypes
         IsVideo(exts, ext) || IsAudio(exts, ext) || IsImage(exts, ext);
 
     public static IEnumerable<string> GetMediaFiles(string[] files) =>
-        files.Where(i => IsMedia(files, i.Ext()));
+        files.Where(i => IsMedia(files, i.Ext));
 }

src/MpvNet/Folder.cs

@@ -1,10 +1,10 @@
 
-using MpvNet.ExtensionMethod;
+using MpvNet.Extensions;
 
 namespace MpvNet;
 
 public class Folder
 {
-    public static string Startup { get; } = Path.GetDirectoryName(Environment.ProcessPath)!.AddSep();
-    public static string AppData { get; } = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData).AddSep();
+    public static string Startup { get; } = Path.GetDirectoryName(Environment.ProcessPath)!.Separator;
+    public static string AppData { get; } = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData).Separator;
 }

src/MpvNet/Player.cs

@@ -8,7 +8,7 @@ using System.Text.Json;
 using System.Text.RegularExpressions;
 using System.Threading;
 
-using MpvNet.ExtensionMethod;
+using MpvNet.Extensions;
 using MpvNet.Help;
 using MpvNet.Native;
 
@@ -127,7 +127,7 @@ public class MainPlayer : MpvClient
         {
             string configDir = CommandLine.GetValue("config-dir");
             string fullPath = System.IO.Path.GetFullPath(configDir);
-            App.InputConf.Path = fullPath.AddSep() + "input.conf";
+            App.InputConf.Path = fullPath.Separator + "input.conf";
             string content = App.InputConf.GetContent();
 
             if (!string.IsNullOrEmpty(content))
@@ -250,7 +250,7 @@ public class MainPlayer : MpvClient
                 string? mpvnet_home = Environment.GetEnvironmentVariable("MPVNET_HOME");
 
                 if (Directory.Exists(mpvnet_home))
-                    return _configFolder = mpvnet_home.AddSep();
+                    return _configFolder = mpvnet_home.Separator;
 
                 _configFolder = Folder.Startup + "portable_config";
 
@@ -260,7 +260,7 @@ public class MainPlayer : MpvClient
                 if (!Directory.Exists(_configFolder))
                     Directory.CreateDirectory(_configFolder);
 
-                _configFolder = _configFolder.AddSep();
+                _configFolder = _configFolder.Separator;
             }
 
             return _configFolder;
@@ -441,7 +441,7 @@ public class MainPlayer : MpvClient
 
             file = ConvertFilePath(file);
 
-            string ext = file.Ext();
+            string ext = file.Ext;
 
             if (OperatingSystem.IsWindows())
             {