Add persistent line number toggle for TXT previews

OPTIONS.md

@@ -265,6 +265,13 @@ These keys are also stored in `QuickLook.config`.
 
 ## QuickLook.Plugin.TextViewer.config options
 
+### `<ShowLineNumbers>`
+- Default: `True`
+- Type: `Boolean`
+- Description: Show line numbers in text previews. Toggle **Show line numbers** in the **…** menu when previewing a TXT file; the choice is saved for subsequent previews and application restarts.
+- Example:
+  - `<ShowLineNumbers>False</ShowLineNumbers>` to hide line numbers.
+
 ### `<UseFormatDetector>`
 - Default: `True`
 - Type: `Boolean`

QuickLook.Plugin/QuickLook.Plugin.TextViewer/Plugin.MoreMenu.cs

@@ -23,6 +23,8 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Reflection;
+using System.Windows;
+using System.Windows.Controls;
 
 namespace QuickLook.Plugin.TextViewer;
 
@@ -42,6 +44,26 @@ public IEnumerable<IMenuItem> GetMenuItems()
         {
         }
 
+        if (extension == ".txt" && _tvp is { } viewer)
+        {
+            var checkMark = new TextBlock
+            {
+                Text = "✓",
+                Visibility = viewer.ShowLineNumbers ? Visibility.Visible : Visibility.Hidden,
+            };
+            yield return new MoreMenuItem
+            {
+                Header = TranslationHelper.Get("Editor_ShowLineNumbers", translationFile),
+                Icon = checkMark,
+                Command = new RelayCommand(() =>
+                {
+                    if (!ReferenceEquals(_tvp, viewer)) return;
+                    viewer.ToggleLineNumbers();
+                    checkMark.Visibility = viewer.ShowLineNumbers ? Visibility.Visible : Visibility.Hidden;
+                }),
+            };
+        }
+
         var reopen = extension switch
         {
             // HTML <=> HTML TEXT

QuickLook.Plugin/QuickLook.Plugin.TextViewer/TextViewerPanel.cs

@@ -72,7 +72,8 @@ static TextViewerPanel()
 
     public TextViewerPanel()
     {
-        ShowLineNumbers = true;
+        ShowLineNumbers = SettingHelper.Get("ShowLineNumbers", true, "QuickLook.Plugin.TextViewer");
+        UpdateTextPadding();
         WordWrap = true;
         IsReadOnly = true;
 
@@ -89,10 +90,7 @@ public TextViewerPanel()
         // The default LineNumberMargin in AvalonEdit often contains a thin Line element
         // used as a visual separator between line numbers and the text.
         // If found, set its Stroke to Transparent to hide the separator visually.
-        TextArea.LeftMargins
-            .OfType<System.Windows.Shapes.Line>()
-            .FirstOrDefault()
-            ?.Stroke = Brushes.Transparent;
+        TextArea.LeftMargins.OfType<System.Windows.Shapes.Line>().FirstOrDefault()?.Stroke = Brushes.Transparent;
 
         ContextMenu = new ContextMenu();
         // Add "Copy" menu item.
@@ -131,6 +129,21 @@ public TextViewerPanel()
         SearchPanel.Install(this);
     }
 
+    public void ToggleLineNumbers()
+    {
+        if (_disposed) return;
+        ShowLineNumbers = !ShowLineNumbers;
+        UpdateTextPadding();
+        // AvalonEdit recreates the separator when numbers are enabled again.
+        TextArea.LeftMargins.OfType<System.Windows.Shapes.Line>().FirstOrDefault()?.Stroke = Brushes.Transparent;
+        SettingHelper.Set("ShowLineNumbers", ShowLineNumbers, "QuickLook.Plugin.TextViewer");
+    }
+
+    private void UpdateTextPadding()
+    {
+        Padding = new Thickness(ShowLineNumbers ? 0 : 6, 0, 0, 0);
+    }
+
     public void Dispose()
     {
         _disposed = true;

QuickLook.Plugin/QuickLook.Plugin.TextViewer/Translations.config

@@ -2,6 +2,7 @@
 
 <Translations>
   <ar>
+    <Editor_ShowLineNumbers>إظهار أرقام الأسطر</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>انسخ</Editor_Copy>
     <Editor_SelectAll>حدد الكل</Editor_SelectAll>
@@ -10,6 +11,7 @@
     <MW_ReopenAsCsvPreview>إعادة فتح كمعاينة CSV</MW_ReopenAsCsvPreview>
   </ar>
   <ca>
+    <Editor_ShowLineNumbers>Mostra els números de línia</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Copia</Editor_Copy>
     <Editor_SelectAll>Selecciona-ho tot</Editor_SelectAll>
@@ -18,6 +20,7 @@
     <MW_ReopenAsCsvPreview>Torna a obrir com a previsualització CSV</MW_ReopenAsCsvPreview>
   </ca>
   <de>
+    <Editor_ShowLineNumbers>Zeilennummern anzeigen</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Kopieren</Editor_Copy>
     <Editor_SelectAll>Alles markieren</Editor_SelectAll>
@@ -26,6 +29,7 @@
     <MW_ReopenAsCsvPreview>Als CSV-Vorschau erneut öffnen</MW_ReopenAsCsvPreview>
   </de>
   <en>
+    <Editor_ShowLineNumbers>Show line numbers</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Copy</Editor_Copy>
     <Editor_SelectAll>Select All</Editor_SelectAll>
@@ -34,6 +38,7 @@
     <MW_ReopenAsCsvPreview>Reopen as CSV preview</MW_ReopenAsCsvPreview>
   </en>
   <es>
+    <Editor_ShowLineNumbers>Mostrar números de línea</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Copiar</Editor_Copy>
     <Editor_SelectAll>Seleccionar Todo</Editor_SelectAll>
@@ -42,6 +47,7 @@
     <MW_ReopenAsCsvPreview>Reabrir como vista previa CSV</MW_ReopenAsCsvPreview>
   </es>
   <fr>
+    <Editor_ShowLineNumbers>Afficher les numéros de ligne</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Copie</Editor_Copy>
     <Editor_SelectAll>Tout sélectionner</Editor_SelectAll>
@@ -50,6 +56,7 @@
     <MW_ReopenAsCsvPreview>Rouvrir en aperçu CSV</MW_ReopenAsCsvPreview>
   </fr>
   <it>
+    <Editor_ShowLineNumbers>Mostra numeri di riga</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Copia</Editor_Copy>
     <Editor_SelectAll>Seleziona tutto</Editor_SelectAll>
@@ -58,6 +65,7 @@
     <MW_ReopenAsCsvPreview>Riapri come anteprima CSV</MW_ReopenAsCsvPreview>
   </it>
   <ja-JP>
+    <Editor_ShowLineNumbers>行番号を表示</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas,Meiryo UI,MS UI Gothic,MS Gothic</Editor_FontFamily>
     <Editor_Copy>コピー</Editor_Copy>
     <Editor_SelectAll>すべて選択</Editor_SelectAll>
@@ -66,6 +74,7 @@
     <MW_ReopenAsCsvPreview>CSV プレビューとして再度開く</MW_ReopenAsCsvPreview>
   </ja-JP>
   <ko>
+    <Editor_ShowLineNumbers>줄 번호 표시</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas,Malgun Gothic,Gulim</Editor_FontFamily>
     <Editor_Copy>복사</Editor_Copy>
     <Editor_SelectAll>모두 선택</Editor_SelectAll>
@@ -74,6 +83,7 @@
     <MW_ReopenAsCsvPreview>CSV 미리보기로 다시 열기</MW_ReopenAsCsvPreview>
   </ko>
   <nb-NO>
+    <Editor_ShowLineNumbers>Vis linjenumre</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Kopier</Editor_Copy>
     <Editor_SelectAll>Merk alt</Editor_SelectAll>
@@ -82,6 +92,7 @@
     <MW_ReopenAsCsvPreview>Åpne på nytt som CSV-forhåndsvisning</MW_ReopenAsCsvPreview>
   </nb-NO>
   <nl-NL>
+    <Editor_ShowLineNumbers>Regelnummers weergeven</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Kopiëren</Editor_Copy>
     <Editor_SelectAll>Alles selecteren</Editor_SelectAll>
@@ -90,6 +101,7 @@
     <MW_ReopenAsCsvPreview>Opnieuw openen als CSV-voorbeeld</MW_ReopenAsCsvPreview>
   </nl-NL>
   <pl>
+    <Editor_ShowLineNumbers>Pokaż numery wierszy</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Kopiuj</Editor_Copy>
     <Editor_SelectAll>Zaznacz wszystko</Editor_SelectAll>
@@ -98,6 +110,7 @@
     <MW_ReopenAsCsvPreview>Otwórz ponownie jako podgląd CSV</MW_ReopenAsCsvPreview>
   </pl>
   <pt-BR>
+    <Editor_ShowLineNumbers>Mostrar números de linha</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Copiar</Editor_Copy>
     <Editor_SelectAll>Selecionar tudo</Editor_SelectAll>
@@ -106,6 +119,7 @@
     <MW_ReopenAsCsvPreview>Reabrir como visualização CSV</MW_ReopenAsCsvPreview>
   </pt-BR>
   <pt-PT>
+    <Editor_ShowLineNumbers>Mostrar números de linha</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Copiar</Editor_Copy>
     <Editor_SelectAll>Selecionar tudo</Editor_SelectAll>
@@ -114,6 +128,7 @@
     <MW_ReopenAsCsvPreview>Reabrir como pré-visualização CSV</MW_ReopenAsCsvPreview>
   </pt-PT>
   <ro>
+    <Editor_ShowLineNumbers>Afișează numerele liniilor</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Copiere</Editor_Copy>
     <Editor_SelectAll>Selectați tot</Editor_SelectAll>
@@ -122,6 +137,7 @@
     <MW_ReopenAsCsvPreview>Redeschideți ca previzualizare CSV</MW_ReopenAsCsvPreview>
   </ro>
   <ru-RU>
+    <Editor_ShowLineNumbers>Отображать номера строк</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Копировать</Editor_Copy>
     <Editor_SelectAll>Выделить всё</Editor_SelectAll>
@@ -130,6 +146,7 @@
     <MW_ReopenAsCsvPreview>Переоткрыть как предварительный просмотр CSV</MW_ReopenAsCsvPreview>
   </ru-RU>
   <tr-TR>
+    <Editor_ShowLineNumbers>Satır numaralarını göster</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Kopyala</Editor_Copy>
     <Editor_SelectAll>Tümünü seç</Editor_SelectAll>
@@ -138,6 +155,7 @@
     <MW_ReopenAsCsvPreview>CSV önizlemesi olarak yeniden aç</MW_ReopenAsCsvPreview>
   </tr-TR>
   <uk-UA>
+    <Editor_ShowLineNumbers>Показувати номери рядків</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Копіювати</Editor_Copy>
     <Editor_SelectAll>Виділити Все</Editor_SelectAll>
@@ -146,6 +164,7 @@
     <MW_ReopenAsCsvPreview>Перевідкрити як попередній перегляд CSV</MW_ReopenAsCsvPreview>
   </uk-UA>
   <vi>
+    <Editor_ShowLineNumbers>Hiển thị số dòng</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Sao chép</Editor_Copy>
     <Editor_SelectAll>Chọn tất cả</Editor_SelectAll>
@@ -154,6 +173,7 @@
     <MW_ReopenAsCsvPreview>Mở lại dưới dạng xem trước CSV</MW_ReopenAsCsvPreview>
   </vi>
   <zh-CN>
+    <Editor_ShowLineNumbers>显示行号</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas,Microsoft Yahei UI,Microsoft Yahei,SimSun</Editor_FontFamily>
     <Editor_Copy>复制</Editor_Copy>
     <Editor_SelectAll>全选</Editor_SelectAll>
@@ -162,62 +182,71 @@
     <MW_ReopenAsCsvPreview>重新作为 CSV 预览打开</MW_ReopenAsCsvPreview>
   </zh-CN>
   <zh-TW>
+    <Editor_ShowLineNumbers>顯示行號</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas,Microsoft JhengHei UI,Microsoft JhengHei,MingLiU</Editor_FontFamily>
     <Editor_Copy>複製</Editor_Copy>
     <Editor_SelectAll>全選</Editor_SelectAll>
     <MW_ReopenAsHtmlPreview>重新作為 HTML 預覽開啟</MW_ReopenAsHtmlPreview>
     <MW_ReopenAsImagePreview>重新作為圖像預覽開啟</MW_ReopenAsImagePreview>
   </zh-TW>
   <mr>
+    <Editor_ShowLineNumbers>ओळ क्रमांक दाखवा</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas,Mangal,Nirmala UI</Editor_FontFamily>
     <Editor_Copy>प्रतिलिपी करा</Editor_Copy>
     <Editor_SelectAll>सर्व निवडा</Editor_SelectAll>
     <MW_ReopenAsHtmlPreview>HTML पूर्वावलोकन म्हणून पुन्हा उघडा</MW_ReopenAsHtmlPreview>
     <MW_ReopenAsImagePreview>प्रतिमा पूर्वावलोकन म्हणून पुन्हा उघडा</MW_ReopenAsImagePreview>
   </mr>
   <hi>
+    <Editor_ShowLineNumbers>पंक्ति संख्याएँ दिखाएँ</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas,Mangal,Nirmala UI</Editor_FontFamily>
     <Editor_Copy>कॉपी करें</Editor_Copy>
     <Editor_SelectAll>सभी चुनें</Editor_SelectAll>
     <MW_ReopenAsHtmlPreview>HTML पूर्वावलोकन के रूप में फिर से खोलें</MW_ReopenAsHtmlPreview>
     <MW_ReopenAsImagePreview>छवि पूर्वावलोकन के रूप में फिर से खोलें</MW_ReopenAsImagePreview>
   </hi>
   <he>
+    <Editor_ShowLineNumbers>הצג מספרי שורות</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>העתק</Editor_Copy>
     <Editor_SelectAll>בחר הכל</Editor_SelectAll>
     <MW_ReopenAsHtmlPreview>פתח מחדש כתצוגה מקדימה של HTML</MW_ReopenAsHtmlPreview>
     <MW_ReopenAsImagePreview>פתח מחדש כתצוגה מקדימה של תמונה</MW_ReopenAsImagePreview>
   </he>
   <hu-HU>
+    <Editor_ShowLineNumbers>Sorszámok megjelenítése</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Másolás</Editor_Copy>
     <Editor_SelectAll>Mindet kijelöl</Editor_SelectAll>
     <MW_ReopenAsHtmlPreview>Újranyitás HTML előnézetként</MW_ReopenAsHtmlPreview>
     <MW_ReopenAsImagePreview>Újranyitás kép előnézetként</MW_ReopenAsImagePreview>
   </hu-HU>
   <id-ID>
+    <Editor_ShowLineNumbers>Tampilkan nomor baris</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Salin</Editor_Copy>
     <Editor_SelectAll>Pilih Semua</Editor_SelectAll>
     <MW_ReopenAsHtmlPreview>Buka ulang sebagai pratinjau HTML</MW_ReopenAsHtmlPreview>
     <MW_ReopenAsImagePreview>Buka ulang sebagai pratinjau gambar</MW_ReopenAsImagePreview>
   </id-ID>
   <sk>
+    <Editor_ShowLineNumbers>Zobraziť čísla riadkov</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Kopírovať</Editor_Copy>
     <Editor_SelectAll>Označiť všetko</Editor_SelectAll>
     <MW_ReopenAsHtmlPreview>Znova otvoriť ako HTML náhľad</MW_ReopenAsHtmlPreview>
     <MW_ReopenAsImagePreview>Znova otvoriť ako náhľad obrázka</MW_ReopenAsImagePreview>
   </sk>
   <el>
+    <Editor_ShowLineNumbers>Εμφάνιση αριθμών γραμμών</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Aντιγραφή</Editor_Copy>
     <Editor_SelectAll>Επιλογή όλων</Editor_SelectAll>
     <MW_ReopenAsHtmlPreview>Επανανοίξτε ως προεπισκόπηση HTML</MW_ReopenAsHtmlPreview>
     <MW_ReopenAsImagePreview>Επανανοίξτε ως προεπισκόπηση εικόνας</MW_ReopenAsImagePreview>
   </el>
   <sv>
+    <Editor_ShowLineNumbers>Visa radnummer</Editor_ShowLineNumbers>
     <Editor_FontFamily>Consolas</Editor_FontFamily>
     <Editor_Copy>Kopiera</Editor_Copy>
     <Editor_SelectAll>Markera allt</Editor_SelectAll>