Support for diacritics aware strings comparison

Foundation/CPString.j

@@ -55,6 +55,12 @@ CPAnchoredSearch        = 8;
     @class CPString
 */
 CPNumericSearch         = 64;
+/*!
+    Search ignores diacritic marks.
+    @global
+    @class CPString
+*/
+CPDiacriticInsensitiveSearch = 128;
 
 var CPStringUIDs        = new CFMutableDictionary();
 
@@ -469,6 +475,12 @@ var CPStringRegexSpecialCharacters = [
         rhs = rhs.toLowerCase();
     }
 
+    if(aMask & CPDiacriticInsensitiveSearch)
+    {
+    	lhs = lhs.stripDiacritics();
+    	rhs = rhs.stripDiacritics();
+    }
+
     if (lhs < rhs)
         return CPOrderedAscending;
     else if (lhs > rhs)
@@ -783,4 +795,31 @@ var CPStringRegexSpecialCharacters = [
 
 @end
 
+var diacritics = [[192,198],[224,230],[231,231],[232,235],[236,239],[242,246],[249,252]]; // Basic Latin ; Latin-1 Supplement.
+var normalized = [65,97,99,101,105,111,117];
+
+String.prototype.stripDiacritics = function ()
+{
+    var output = "";
+    for (var indexSource = 0; indexSource < this.length; indexSource++)
+    {
+        var code = this.charCodeAt(indexSource);
+
+        for (var i = 0; i < diacritics.length; i++)
+        {
+            var drange = diacritics[i];
+
+            if (code >= drange[0] && code <= drange[drange.length-1])
+            {
+                code = normalized[i];
+                break;
+            }
+        }
+
+        output += String.fromCharCode(code);
+    }
+
+    return output;
+}
+
 String.prototype.isa = CPString;