Update ToTitleCase.cs

ghost1372 · Jun 11, 2021 · 90cab3a · 90cab3a
1 parent d2c36d5
commit 90cab3a
Showing 1 changed file with 25 additions and 4 deletions.
diff --git a/...ed/HandyControl_Shared/HandyControls/Tools/Extension/Internals/Transformer/ToTitleCase.cs b/...ed/HandyControl_Shared/HandyControls/Tools/Extension/Internals/Transformer/ToTitleCase.cs
@@ -1,4 +1,5 @@
-using System.Globalization;
+using System.Collections.Generic;
+using System.Globalization;
 using System.Linq;
 using System.Text.RegularExpressions;
 
@@ -17,12 +18,14 @@ public string Transform(string input, CultureInfo culture)
 
             var result = input;
             var matches = Regex.Matches(input, @"(\w|[^\u0000-\u007F])+'?\w*");
+            var firstWord = true;
             foreach (Match word in matches)
             {
                 if (!AllCapitals(word.Value))
                 {
-                    result = ReplaceWithTitleCase(word, result, culture);
+                    result = ReplaceWithTitleCase(word, result, culture, firstWord);
                 }
+                firstWord = false;
             }
 
             return result;
@@ -33,10 +36,28 @@ private static bool AllCapitals(string input)
             return input.ToCharArray().All(char.IsUpper);
         }
 
-        private static string ReplaceWithTitleCase(Match word, string source, CultureInfo culture)
+        private static string ReplaceWithTitleCase(Match word, string source, CultureInfo culture, bool firstWord)
         {
+            var articles = new List<string> { "a", "an", "the" };
+            var conjunctions = new List<string> { "and", "as", "but", "if", "nor", "or", "so", "yet" };
+            var prepositions = new List<string> { "as", "at", "by", "for", "in", "of", "off", "on", "to", "up", "via" };
+
             var wordToConvert = word.Value;
-            var replacement = culture.TextInfo.ToUpper(wordToConvert[0]) + culture.TextInfo.ToLower(wordToConvert.Remove(0, 1));
+            string replacement;
+
+
+            if (firstWord || 
+                (!articles.Contains(wordToConvert) &&
+                !conjunctions.Contains(wordToConvert) &&
+                !prepositions.Contains(wordToConvert)))
+            {
+                replacement = culture.TextInfo.ToUpper(wordToConvert[0]) + culture.TextInfo.ToLower(wordToConvert.Remove(0, 1));
+
+            }
+            else
+            {
+                replacement = culture.TextInfo.ToLower(wordToConvert);
+            }
             return source.Substring(0, word.Index) + replacement + source.Substring(word.Index + word.Length);
         }
     }