src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/TextReaderExtensions.cs

   1 using System;
   2 using System.IO;
   3 using System.Linq;
   4 using System.Text;
   5
   6 namespace Tizen.NUI.StyleSheets
   7 {
   8     internal static class TextReaderExtensions
   9     {
  10         //ident         [-]?{nmstart}{nmchar}*
  11         public static string ReadIdent(this TextReader reader)
  12         {
  13             var sb = new StringBuilder();
  14             bool first = true;
  15             bool hasLeadingDash = false;
  16             int p;
  17             while ((p = reader.Peek()) > 0)
  18             {
  19                 var c = unchecked((char)p);
  20                 if (first && !hasLeadingDash && c == '-')
  21                 {
  22                     sb.Append((char)reader.Read());
  23                     hasLeadingDash = true;
  24                 }
  25                 else if (first && c.IsNmStart())
  26                 {
  27                     sb.Append((char)reader.Read());
  28                     first = false;
  29                 }
  30                 else if (first)
  31                 { //a nmstart is expected
  32                     throw new Exception();
  33                 }
  34                 else if (c.IsNmChar())
  35                     sb.Append((char)reader.Read());
  36                 else
  37                     break;
  38             }
  39             return sb.ToString();
  40         }
  41
  42         //name          {nmchar}+
  43         public static string ReadName(this TextReader reader)
  44         {
  45             var sb = new StringBuilder();
  46             int p;
  47             while ((p = reader.Peek()) > 0)
  48             {
  49                 var c = unchecked((char)p);
  50                 if (c.IsNmChar())
  51                     sb.Append((char)reader.Read());
  52                 else
  53                     break;
  54             }
  55             return sb.ToString();
  56         }
  57
  58         public static string ReadUntil(this TextReader reader, params char[] limit)
  59         {
  60             var sb = new StringBuilder();
  61             int p;
  62             while ((p = reader.Peek()) > 0)
  63             {
  64                 var c = unchecked((char)p);
  65                 if (limit != null && limit.Contains(c))
  66                     break;
  67                 reader.Read();
  68                 sb.Append(c);
  69             }
  70             return sb.ToString();
  71         }
  72
  73         //w                     [ \t\r\n\f]*
  74         public static void SkipWhiteSpaces(this TextReader reader)
  75         {
  76             int p;
  77             while ((p = reader.Peek()) > 0)
  78             {
  79                 var c = unchecked((char)p);
  80                 if (!c.IsW())
  81                     break;
  82                 reader.Read();
  83             }
  84         }
  85     }
  86 }