arranged text validators

GeonBit.UI/Source/Entities/TextValidators/EnglishCharactersOnly.cs

@@ -0,0 +1,76 @@
+#region File Description
+//-----------------------------------------------------------------------------
+// Validators you can attach to TextInput entities to manipulate and validate
+// user input. These are used to create things like text input for numbers only,
+// limit characters to english chars, etc.
+//
+// Author: Ronen Ness.
+// Since: 2016.
+//-----------------------------------------------------------------------------
+#endregion
+
+namespace GeonBit.UI.Entities.TextValidators
+{
+    /// <summary>
+    /// Make sure input contains only english characters.
+    /// </summary>
+    [System.Serializable]
+    public class EnglishCharactersOnly : ITextValidator
+    {
+        /// <summary>
+        /// Static ctor.
+        /// </summary>
+        static EnglishCharactersOnly()
+        {
+            Entity.MakeSerializable(typeof(EnglishCharactersOnly));
+        }
+
+        // the regex to use
+        System.Text.RegularExpressions.Regex _regex;
+
+        // regex for english only with spaces
+        static readonly System.Text.RegularExpressions.Regex _slugNoSpaces = new System.Text.RegularExpressions.Regex(@"^[a-zA-Z|]+$");
+
+        // regex for english only without spaces
+        static readonly System.Text.RegularExpressions.Regex _slugWithSpaces = new System.Text.RegularExpressions.Regex(@"^[a-zA-Z|\ ]+$");
+
+        // do we allow spaces in text?
+        private bool _allowSpaces;
+
+        /// <summary>
+        /// Set / get if we allow spaces in text.
+        /// </summary>
+        public bool AllowSpaces
+        {
+            get { return _allowSpaces; }
+            set { _allowSpaces = value; _regex = _allowSpaces ? _slugWithSpaces : _slugNoSpaces; }
+        }
+
+        /// <summary>
+        /// Create the validator.
+        /// </summary>
+        /// <param name="allowSpaces">If true, will allow spaces.</param>
+        public EnglishCharactersOnly(bool allowSpaces)
+        {
+            AllowSpaces = allowSpaces;
+        }
+
+        /// <summary>
+        /// Create the validator with default params.
+        /// </summary>
+        public EnglishCharactersOnly() : this(false)
+        {
+        }
+
+        /// <summary>
+        /// Return true if text input is only english characters.
+        /// </summary>
+        /// <param name="text">New text input value.</param>
+        /// <param name="oldText">Previous text input value.</param>
+        /// <returns>If TextInput value is legal.</returns>
+        public override bool ValidateText(ref string text, string oldText)
+        {
+            return (text.Length == 0 || _regex.IsMatch(text));
+        }
+    }
+}