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Viewing changes to src/AddIns/BackendBindings/XamlBinding/XamlBinding/PropertyPathTokenizer.cs

  • Committer: sk
  • Date: 2011-09-10 05:17:57 UTC
  • Revision ID: halega@halega.com-20110910051757-qfouz1llya9m6boy
4.1.0.7915 Release Candidate 1

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src/AddIns/BackendBindings/XamlBinding/XamlBinding/PropertyPathTokenizer.cs
 
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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
 
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// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
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using System;
 
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using System.Linq;
 
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using System.Collections.Generic;
 
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namespace ICSharpCode.XamlBinding
 
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{
 
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        public class PropertyPathTokenizer
 
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        {
 
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                string value;
 
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                int offset;
 
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                public static readonly char[] ControlChars = new char[] { '.', ',', '(', ')', '[', ']', '/' };
 
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                PropertyPathTokenizer(string value)
 
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                {
 
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                        this.value = value;
 
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                        this.offset = 0;
 
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                }
 
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                bool NextToken(out string token)
 
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                {
 
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                        token = "";
 
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                        if (MoveToNext()) {
 
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                                switch (value[offset]) {
 
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                                        case '.':
 
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                                        case '(':
 
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                                        case ')':
 
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                                        case '[':
 
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                                        case ']':
 
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                                        case ',':
 
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                                        case '/':
 
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                                                token = value[offset].ToString();
 
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                                                offset++;
 
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                                                return true;
 
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                                        default:
 
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                                                string text = "";
 
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                                                while (!AtEnd() && char.IsLetterOrDigit(value[offset])) {
 
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                                                        text += value[offset];
 
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                                                        offset++;
 
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                                                }
 
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                                                token = text;
 
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                                                return true;
 
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                                }
 
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                        }
 
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                        return false;
 
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                }
 
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                bool MoveToNext()
 
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                {
 
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                        // skip all invalid chars
 
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                        while (!AtEnd() && !char.IsLetterOrDigit(value[offset]) && !ControlChars.Contains(value[offset]))
 
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                                offset++;
 
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                        return !AtEnd();
 
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                }
 
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                bool AtEnd()
 
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                {
 
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                        return offset >= value.Length;
 
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                }
 
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                public static IEnumerable<string> Tokenize(string value)
 
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                {
 
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                        if (value == null)
 
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                                throw new ArgumentNullException("value");
 
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                        PropertyPathTokenizer tokenizer = new PropertyPathTokenizer(value);
 
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                        string token;
 
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                        while (tokenizer.NextToken(out token))
 
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                                yield return token;
 
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                }
 
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        }
 
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}