From 6b3a4e703b3eee683193a0a0c70ebde589cc3101 Mon Sep 17 00:00:00 2001
From: niksedk <nikse.dk@gmail.com>
Date: Tue, 26 May 2026 16:51:55 +0200
Subject: [PATCH] RemoveUnicodeCharacters: expand built-in replacement defaults
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Grow the seed map from the original 2 entries (music ♪♫ -> #) to 41
covering smart quotes, the full dash family, ellipsis variants, music
note heads, all wide/narrow space variants, and zero-width / BOM
characters. These are cases where the ASCII mapping is essentially
lossless or matches universal ANSI-export practice.

Debatable cases (bullets, arrows, math, trademark, music accidentals)
are deliberately left blank so the user picks per row in the UI.

Extract the dictionary into its own UnicodeDefaults.cs to keep
MainWindow.axaml.cs readable.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 .../MainWindow.axaml.cs                       |  9 +--
 .../UnicodeDefaults.cs                        | 69 +++++++++++++++++++
 2 files changed, 70 insertions(+), 8 deletions(-)
 create mode 100644 se5/RemoveUnicodeCharacters/UnicodeDefaults.cs

diff --git a/se5/RemoveUnicodeCharacters/MainWindow.axaml.cs b/se5/RemoveUnicodeCharacters/MainWindow.axaml.cs
index 9394c65..49765ea 100644
--- a/se5/RemoveUnicodeCharacters/MainWindow.axaml.cs
+++ b/se5/RemoveUnicodeCharacters/MainWindow.axaml.cs
@@ -16,13 +16,6 @@ namespace SubtitleEdit.Plugins.RemoveUnicodeCharacters;
 
 public partial class MainWindow : Window
 {
-    /// <summary>Built-in default replacements (used when the user has no persisted setting for a character).</summary>
-    private static readonly Dictionary<char, string> DefaultReplacements = new()
-    {
-        ['♪'] = "#",
-        ['♫'] = "#",
-    };
-
     private readonly PluginRequest _request;
     private readonly List<SrtBlock> _blocks;
     private readonly Dictionary<string, string> _persistedReplacements;
@@ -125,7 +118,7 @@ private string ResolveDefaultReplacement(char c)
         {
             return persisted;
         }
-        return DefaultReplacements.TryGetValue(c, out var builtIn) ? builtIn : string.Empty;
+        return UnicodeDefaults.Map.TryGetValue(c, out var builtIn) ? builtIn : string.Empty;
     }
 
     private void UpdateUiForRows()
diff --git a/se5/RemoveUnicodeCharacters/UnicodeDefaults.cs b/se5/RemoveUnicodeCharacters/UnicodeDefaults.cs
new file mode 100644
index 0000000..21c47a3
--- /dev/null
+++ b/se5/RemoveUnicodeCharacters/UnicodeDefaults.cs
@@ -0,0 +1,69 @@
+using System.Collections.Generic;
+
+namespace SubtitleEdit.Plugins.RemoveUnicodeCharacters;
+
+/// <summary>
+/// Built-in suggested replacements for non-ANSI characters that have a near-lossless
+/// or universally understood ASCII equivalent. Used as the seed value for the
+/// "Replace with" column when the user has no persisted setting for a character.
+/// Debatable cases (bullets, arrows, math, trademark, music accidentals) are
+/// deliberately omitted - the UI shows them blank so the user picks per row.
+/// </summary>
+internal static class UnicodeDefaults
+{
+    public static readonly Dictionary<char, string> Map = new()
+    {
+        // Smart quotes -> straight ASCII quotes
+        ['‘'] = "'",   // ' left single quotation mark
+        ['’'] = "'",   // ' right single quotation mark
+        ['‚'] = ",",   // ‚ single low-9 quotation mark
+        ['‛'] = "'",   // ‛ single high-reversed-9
+        ['“'] = "\"",  // " left double quotation mark
+        ['”'] = "\"",  // " right double quotation mark
+        ['„'] = "\"",  // „ double low-9 quotation mark
+        ['‟'] = "\"",  // ‟ double high-reversed-9
+
+        // Hyphens / dashes -> hyphen-minus
+        ['‐'] = "-",   // ‐ hyphen
+        ['‑'] = "-",   // ‑ non-breaking hyphen
+        ['‒'] = "-",   // ‒ figure dash
+        ['–'] = "-",   // – en dash
+        ['—'] = "-",   // — em dash
+        ['―'] = "-",   // ― horizontal bar
+        ['−'] = "-",   // − minus sign
+
+        // Ellipses / dot leaders
+        ['․'] = ".",   // ․ one-dot leader
+        ['‥'] = "..",  // ‥ two-dot leader
+        ['…'] = "...", // … horizontal ellipsis
+
+        // Music notes (note heads, not accidentals)
+        ['♩'] = "#",   // ♩ quarter note
+        ['♪'] = "#",   // ♪ eighth note
+        ['♫'] = "#",   // ♫ beamed eighth notes
+        ['♬'] = "#",   // ♬ beamed sixteenth notes
+
+        // Wide / narrow space variants -> regular space
+        [' '] = " ",   // en quad
+        [' '] = " ",   // em quad
+        [' '] = " ",   // en space
+        [' '] = " ",   // em space
+        [' '] = " ",   // three-per-em space
+        [' '] = " ",   // four-per-em space
+        [' '] = " ",   // six-per-em space
+        [' '] = " ",   // figure space
+        [' '] = " ",   // punctuation space
+        [' '] = " ",   // thin space
+        [' '] = " ",   // hair space
+        [' '] = " ",   // narrow no-break space
+        [' '] = " ",   // medium mathematical space
+        ['　'] = " ",   // ideographic space
+
+        // Zero-width and joiner controls -> remove
+        ['​'] = "",    // zero-width space
+        ['‌'] = "",    // zero-width non-joiner
+        ['‍'] = "",    // zero-width joiner
+        ['⁠'] = "",    // word joiner
+        [''] = "",    // zero-width no-break space / BOM
+    };
+}