src/Tizen.NUI/src/internal/Xaml/MarkupExtensions/StaticExtension.cs

   1 using System;
   2 using System.Linq;
   3 using System.Reflection;
   4 using System.Xml;
   5 using Tizen.NUI.Binding;
   6
   7 namespace Tizen.NUI.Xaml
   8 {
   9     [ContentProperty(nameof(Member))]
  10     [ProvideCompiled("Tizen.NUI.Xaml.Build.Tasks.StaticExtension")]
  11     internal class StaticExtension : IMarkupExtension
  12     {
  13         public string Member { get; set; }
  14
  15         public object ProvideValue(IServiceProvider serviceProvider)
  16         {
  17             IXmlLineInfoProvider lineInfoProvider;
  18             IXmlLineInfo lineInfo;
  19
  20             if (serviceProvider == null)
  21                 throw new ArgumentNullException(nameof(serviceProvider));
  22             var typeResolver = serviceProvider.GetService(typeof (IXamlTypeResolver)) as IXamlTypeResolver;
  23             if (typeResolver == null)
  24                 throw new ArgumentException("No IXamlTypeResolver in IServiceProvider");
  25
  26             if (string.IsNullOrEmpty(Member) || !Member.Contains("."))
  27             {
  28                 lineInfoProvider = serviceProvider.GetService(typeof (IXmlLineInfoProvider)) as IXmlLineInfoProvider;
  29                 lineInfo = (lineInfoProvider != null) ? lineInfoProvider.XmlLineInfo : new XmlLineInfo();
  30                 throw new XamlParseException("Syntax for x:Static is [Member=][prefix:]typeName.staticMemberName", lineInfo);
  31             }
  32
  33             var dotIdx = Member.LastIndexOf('.');
  34             var typename = Member.Substring(0, dotIdx);
  35             var membername = Member.Substring(dotIdx + 1);
  36
  37             var type = typeResolver.Resolve(typename, serviceProvider);
  38
  39             var pinfo = type.GetRuntimeProperties().FirstOrDefault(pi => pi.GetMethod != null && pi.Name == membername && pi.GetMethod.IsStatic);
  40             if (pinfo != null)
  41                 return pinfo.GetMethod?.Invoke(null, Array.Empty<object>());
  42
  43             var finfo = type.GetRuntimeFields().FirstOrDefault(fi => fi.Name == membername && fi.IsStatic);
  44             if (finfo != null)
  45                 return finfo.GetValue(null);
  46
  47             lineInfoProvider = serviceProvider.GetService(typeof (IXmlLineInfoProvider)) as IXmlLineInfoProvider;
  48             lineInfo = (lineInfoProvider != null) ? lineInfoProvider.XmlLineInfo : new XmlLineInfo();
  49             throw new XamlParseException($"No static member found for {Member}", lineInfo);
  50         }
  51     }
  52 }