src/Tizen.NUI.Xaml/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                 var c = unchecked((char)p);
  19                 if (first && !hasLeadingDash && c == '-') {
  20                     sb.Append((char)reader.Read());
  21                     hasLeadingDash = true;
  22                 } else if (first && c.IsNmStart()) {
  23                     sb.Append((char)reader.Read());
  24                     first = false;
  25                 } else if (first) { //a nmstart is expected
  26                     throw new Exception();
  27                 } else if (c.IsNmChar())
  28                     sb.Append((char)reader.Read());
  29                 else
  30                     break;
  31             }
  32             return sb.ToString();
  33         }
  34
  35         //name          {nmchar}+
  36         public static string ReadName(this TextReader reader)
  37         {
  38             var sb = new StringBuilder();
  39             int p;
  40             while ((p = reader.Peek()) > 0) {
  41                 var c = unchecked((char)p);
  42                 if (c.IsNmChar())
  43                     sb.Append((char)reader.Read());
  44                 else
  45                     break;
  46             }
  47             return sb.ToString();
  48         }
  49
  50         public static string ReadUntil(this TextReader reader, params char[] limit)
  51         {
  52             var sb = new StringBuilder();
  53             int p;
  54             while ((p = reader.Peek()) > 0) {
  55                 var c = unchecked((char)p);
  56                 if (limit != null && limit.Contains(c))
  57                     break;
  58                 reader.Read();
  59                 sb.Append(c);
  60             }
  61             return sb.ToString();
  62         }
  63
  64         //w                     [ \t\r\n\f]*
  65         public static void SkipWhiteSpaces(this TextReader reader)
  66         {
  67             int p;
  68             while ((p = reader.Peek()) > 0) {
  69                 var c = unchecked((char)p);
  70                 if (!c.IsW())
  71                     break;
  72                 reader.Read();
  73             }
  74         }
  75     }
  76 }