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Viewing changes to contrib/Sharpen/Sharpen/MessageFormat.cs

  • Committer: Bazaar Package Importer
  • Author(s): Jo Shields
  • Date: 2011-06-27 17:03:13 UTC
  • mto: (1.8.1 upstream)
  • mto: This revision was merged to the branch mainline in revision 54.
  • Revision ID: james.westby@ubuntu.com-20110627170313-6cvz3s19x6e9hqe9
Import upstream version 2.5.92+dfsg

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contrib/Sharpen/Sharpen/MessageFormat.cs
 
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using System.Text;
 
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using System.Collections.Generic;
 
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namespace Sharpen
 
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{
 
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        using System;
 
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        internal class MessageFormat
 
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        {
 
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                public static string Format (string message, params object[] args)
 
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                {
 
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                        StringBuilder sb = new StringBuilder ();
 
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                        bool inQuote = false;
 
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                        bool inPlaceholder = false;
 
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                        int argStartPos = 0;
 
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                        List<string> placeholderArgs = new List<string> (3);
 
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                        for (int n=0; n<message.Length; n++) {
 
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                                char c = message[n];
 
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                                if (c == '\'') {
 
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                                        if (!inQuote)
 
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                                                inQuote = true;
 
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                                        else if (n > 0 && message [n-1] == '\'') {
 
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                                                inQuote = false;
 
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                                        }
 
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                                        else {
 
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                                                inQuote = false;
 
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                                                continue;
 
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                                        }
 
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                                }
 
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                                else if (c == '{' && !inQuote) {
 
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                                        inPlaceholder = true;
 
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                                        argStartPos = n + 1;
 
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                                        continue;
 
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                                }
 
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                                else if (c == '}' && !inQuote && inPlaceholder) {
 
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                                        inPlaceholder = false;
 
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                                        placeholderArgs.Add (message.Substring (argStartPos, n - argStartPos));
 
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                                        AddFormatted (sb, placeholderArgs, args);
 
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                                        placeholderArgs.Clear ();
 
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                                        continue;
 
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                                }
 
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                                else if (c == ',' && inPlaceholder) {
 
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                                        placeholderArgs.Add (message.Substring (argStartPos, n - argStartPos));
 
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                                        argStartPos = n + 1;
 
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                                        continue;
 
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                                }
 
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                                else if (inPlaceholder)
 
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                                        continue;
 
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                                sb.Append (c);
 
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                        }
 
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                        return sb.ToString ();
 
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                }
 
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                static void AddFormatted (StringBuilder sb, List<string> placeholderArgs, object[] args)
 
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                {
 
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                        if (placeholderArgs.Count > 3)
 
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                                throw new ArgumentException ("Invalid format pattern: {" + string.Join (",", placeholderArgs.ToArray()) + "}");
 
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                        int narg;
 
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                        if (!int.TryParse (placeholderArgs[0], out narg))
 
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                                throw new ArgumentException ("Invalid argument index: " + placeholderArgs[0]);
 
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                        if (narg < 0 || narg >= args.Length)
 
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                                throw new ArgumentException ("Invalid argument index: " + narg);
 
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                        object arg = args [narg];
 
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                        sb.Append (arg);
 
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                        // TODO: handle format types and styles
 
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                }
 
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        }
 
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}