src/Tizen.NUI.XamlBuild/src/internal/Xaml/TypeArgumentsParser.cs

   1
   2 using System.Collections.Generic;
   3 using System.Xml;
   4
   5 namespace Tizen.NUI.Xaml
   6 {
   7     internal static class TypeArgumentsParser
   8     {
   9         public static IList<XmlType> ParseExpression(string expression, IXmlNamespaceResolver resolver, IXmlLineInfo lineInfo)
  10         {
  11             var typeList = new List<XmlType>();
  12             while (!string.IsNullOrWhiteSpace(expression))
  13             {
  14                 var match = expression;
  15                 typeList.Add(Parse(match, ref expression, resolver, lineInfo));
  16             }
  17             return typeList;
  18         }
  19
  20         static XmlType Parse(string match, ref string remaining, IXmlNamespaceResolver resolver, IXmlLineInfo lineinfo)
  21         {
  22             remaining = null;
  23             int parensCount = 0;
  24             int pos = 0;
  25             bool isGeneric = false;
  26
  27             for (pos = 0; pos < match.Length; pos++)
  28             {
  29                 if (match[pos] == '(')
  30                 {
  31                     parensCount++;
  32                     isGeneric = true;
  33                 }
  34                 else if (match[pos] == ')')
  35                     parensCount--;
  36                 else if (match[pos] == ',' && parensCount == 0)
  37                 {
  38                     remaining = match.Substring(pos + 1);
  39                     break;
  40                 }
  41             }
  42             var type = match.Substring(0, pos).Trim();
  43
  44             IList<XmlType> typeArguments = null;
  45             if (isGeneric)
  46             {
  47                 typeArguments = ParseExpression(
  48                     type.Substring(type.IndexOf('(') + 1, type.LastIndexOf(')') - type.IndexOf('(') - 1), resolver, lineinfo);
  49                 type = type.Substring(0, type.IndexOf('('));
  50             }
  51
  52             var split = type.Split(':');
  53             if (split.Length > 2)
  54                 return null;
  55
  56             string prefix, name;
  57             if (split.Length == 2) {
  58                 prefix = split [0];
  59                 name = split [1];
  60             } else {
  61                 prefix = "";
  62                 name = split [0];
  63             }
  64
  65             var namespaceuri = resolver.LookupNamespace(prefix);
  66             if (namespaceuri == null)
  67                 throw new XamlParseException($"No xmlns declaration for prefix '{prefix}'.", lineinfo, null);
  68             return new XmlType(namespaceuri, name, typeArguments);
  69         }
  70     }
  71 }