enhance: ignore invalid font family names

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/App.axaml.cs

@@ -285,15 +285,15 @@ public static void SetFonts(string defaultFont, string monospaceFont)
                 if (!string.IsNullOrEmpty(defaultFont))
                 {
                     monospaceFont = $"fonts:SourceGit#JetBrains Mono,{defaultFont}";
-                    resDic.Add("Fonts.Monospace", new FontFamily(monospaceFont));
+                    resDic.Add("Fonts.Monospace", FontFamily.Parse(monospaceFont));
                 }
             }
             else
             {
                 if (!string.IsNullOrEmpty(defaultFont) && !monospaceFont.Contains(defaultFont, StringComparison.Ordinal))
                     monospaceFont = $"{monospaceFont},{defaultFont}";
 
-                resDic.Add("Fonts.Monospace", new FontFamily(monospaceFont));
+                resDic.Add("Fonts.Monospace", FontFamily.Parse(monospaceFont));
             }
 
             if (resDic.Count > 0)
@@ -663,9 +663,8 @@ private string FixFontFamilyName(string input)
                 if (string.IsNullOrEmpty(t))
                     continue;
 
-                // Collapse multiple spaces into single space
-                var prevChar = '\0';
                 var sb = new StringBuilder();
+                var prevChar = '\0';
 
                 foreach (var c in t)
                 {
@@ -676,14 +675,16 @@ private string FixFontFamilyName(string input)
                 }
 
                 var name = sb.ToString();
-                if (name.Contains('#'))
+                try
                 {
-                    if (!name.Equals("fonts:Inter#Inter", StringComparison.Ordinal) &&
-                        !name.Equals("fonts:SourceGit#JetBrains Mono", StringComparison.Ordinal))
-                        continue;
+                    var fontFamily = FontFamily.Parse(name);
+                    if (fontFamily.FamilyTypefaces.Count > 0)
+                        trimmed.Add(name);
+                }
+                catch
+                {
+                    // Ignore exceptions.
                 }
-
-                trimmed.Add(name);
             }
 
             return trimmed.Count > 0 ? string.Join(',', trimmed) : string.Empty;