Fix LyricsReplaceDialog bug

OpenUtau/Strings/Strings.axaml

@@ -86,6 +86,8 @@
   <system:String x:Key="errors.failed.save">Failed to save</system:String>
   <system:String x:Key="errors.failed.savesingerconfig">Failed to save singer config file</system:String>
   <system:String x:Key="errors.failed.searchsinger">Failed to search singers</system:String>
+  <system:String x:Key="errors.lyrics.regex">Character not allowed in regular expression</system:String>
+  <system:String x:Key="errors.lyrics.regexpreview">- regular expression error -</system:String>
 
   <system:String x:Key="exps.abbr">Abbreviation</system:String>
   <system:String x:Key="exps.apply">Apply</system:String>

OpenUtau/Strings/Strings.ja-JP.axaml

@@ -85,6 +85,8 @@
   <system:String x:Key="errors.failed.save">保存に失敗しました</system:String>
   <system:String x:Key="errors.failed.savesingerconfig">シンガー設定の保存に失敗しました</system:String>
   <system:String x:Key="errors.failed.searchsinger">シンガーの取得に失敗しました</system:String>
+  <system:String x:Key="errors.lyrics.regex">正規表現に使用できない文字が含まれています</system:String>
+  <system:String x:Key="errors.lyrics.regexpreview">- 正規表現エラー -</system:String>
 
   <system:String x:Key="exps.abbr">パラメータの略称</system:String>
   <system:String x:Key="exps.apply">適用</system:String>

OpenUtau/ViewModels/LyricsReplaceViewModel.cs

@@ -36,7 +36,11 @@ public LyricsReplaceViewModel(UVoicePart part, UNote[] notes, string[] lyrics) {
 
             this.WhenAnyValue(x => x.OldValue, x => x.NewValue)
                 .Subscribe(t => {
-                    Preview = Replace();
+                    try {
+                        Preview = Replace();
+                    } catch {
+                        Preview = ThemeManager.GetString("errors.lyrics.regexpreview");
+                    }
                 });
             this.WhenValueChanged(x => SelectedPreset)
                 .Subscribe(p => {
@@ -55,16 +59,22 @@ public string Replace() {
             return string.Join(", ", Lyrics);
         }
 
-        public void Finish() {
-            DocManager.Inst.StartUndoGroup();
+        public bool Finish() {
+            try {
+                Replace();
+            } catch (Exception ex) {
+                DocManager.Inst.ExecuteCmd(new ErrorMessageNotification(new MessageCustomizableException("Character not allowed in regular expression.", "<translate:errors.lyrics.regex>", ex)));
+                return false;
+            }
 
+            DocManager.Inst.StartUndoGroup();
             for (int i = 0; i < Lyrics.Length && i < notes.Length; ++i) {
                 if (notes[i].lyric != Lyrics[i]) {
                     DocManager.Inst.ExecuteCmd(new ChangeNoteLyricCommand(part, notes[i], Lyrics[i]));
                 }
             }
-
             DocManager.Inst.EndUndoGroup();
+            return true;
         }
     }
 

OpenUtau/Views/LyricsReplaceDialog.axaml.cs

@@ -14,8 +14,9 @@ void OnCancel(object? sender, RoutedEventArgs e) {
         }
 
         void OnFinish(object? sender, RoutedEventArgs e) {
-            (DataContext as LyricsReplaceViewModel)!.Finish();
-            Close();
+            if((DataContext as LyricsReplaceViewModel)!.Finish()) {
+                Close();
+            }
         }
 
         private void OnKeyDown(object? sender, KeyEventArgs e) {