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         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 }