Implement the reference lyric edit mode section.

osu.Game.Rulesets.Karaoke/Edit/Lyrics/Extends/Reference/ReferenceExtend.cs

@@ -0,0 +1,20 @@
+// Copyright (c) andy840119 <[email protected]>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+namespace osu.Game.Rulesets.Karaoke.Edit.Lyrics.Extends.Reference
+{
+    public class ReferenceExtend : EditExtend
+    {
+        public override ExtendDirection Direction => ExtendDirection.Right;
+
+        public override float ExtendWidth => 300;
+
+        public ReferenceExtend()
+        {
+            Children = new[]
+            {
+                new ReferenceLyricAutoGenerateSection(),
+            };
+        }
+    }
+}

osu.Game.Rulesets.Karaoke/Edit/Lyrics/Extends/Reference/ReferenceLyricAutoGenerateSection.cs

@@ -0,0 +1,55 @@
+// Copyright (c) andy840119 <[email protected]>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Graphics.UserInterface;
+using osu.Framework.Localisation;
+using osu.Game.Rulesets.Karaoke.Edit.Components.Containers;
+using osu.Game.Rulesets.Karaoke.Edit.Configs.Generator.ReferenceLyric;
+using osu.Game.Rulesets.Karaoke.Edit.Lyrics.Extends.Components;
+
+namespace osu.Game.Rulesets.Karaoke.Edit.Lyrics.Extends.Reference
+{
+    public class ReferenceLyricAutoGenerateSection : Section
+    {
+        protected override LocalisableString Title => "Auto generate";
+
+        public ReferenceLyricAutoGenerateSection()
+        {
+            Children = new[]
+            {
+                new ReferenceLyricAutoGenerateSubsection()
+            };
+        }
+
+        private class ReferenceLyricAutoGenerateSubsection : AutoGenerateSubsection
+        {
+            public ReferenceLyricAutoGenerateSubsection()
+                : base(LyricAutoGenerateProperty.DetectReferenceLyric)
+            {
+            }
+
+            protected override InvalidLyricAlertTextContainer CreateInvalidLyricAlertTextContainer()
+                => new InvalidLyricLanguageAlertTextContainer();
+
+            protected override ConfigButton CreateConfigButton()
+                => new ReferenceLyricAutoGenerateConfigButton();
+
+            protected class InvalidLyricLanguageAlertTextContainer : InvalidLyricAlertTextContainer
+            {
+                private const string language_mode = "LANGUAGE_MODE";
+
+                public InvalidLyricLanguageAlertTextContainer()
+                {
+                    SwitchToEditorMode(language_mode, "edit language mode", LyricEditorMode.Language);
+                    Text = $"Seems some lyric missing language, go to [{language_mode}] to fill the language.";
+                }
+            }
+
+            protected class ReferenceLyricAutoGenerateConfigButton : ConfigButton
+            {
+                public override Popover GetPopover()
+                    => new ReferenceLyricDetectorConfigPopover();
+            }
+        }
+    }
+}

osu.Game.Rulesets.Karaoke/Edit/Lyrics/LyricEditor.cs

@@ -18,6 +18,7 @@
 using osu.Game.Rulesets.Karaoke.Edit.Lyrics.Extends;
 using osu.Game.Rulesets.Karaoke.Edit.Lyrics.Extends.Languages;
 using osu.Game.Rulesets.Karaoke.Edit.Lyrics.Extends.Notes;
+using osu.Game.Rulesets.Karaoke.Edit.Lyrics.Extends.Reference;
 using osu.Game.Rulesets.Karaoke.Edit.Lyrics.Extends.RubyRomaji;
 using osu.Game.Rulesets.Karaoke.Edit.Lyrics.Extends.Singers;
 using osu.Game.Rulesets.Karaoke.Edit.Lyrics.Extends.Texting;
@@ -230,6 +231,7 @@ EditExtend getExtendArea() =>
                 Mode switch
                 {
                     LyricEditorMode.Texting => new TextingExtend(),
+                    LyricEditorMode.Reference => new ReferenceExtend(),
                     LyricEditorMode.Language => new LanguageExtend(),
                     LyricEditorMode.EditRuby => new RubyTagExtend(),
                     LyricEditorMode.EditRomaji => new RomajiTagExtend(),