src/Tizen.NUI/src/public/Xaml/StaticResourceExtension.cs

   1 using System;
   2 using System.Xml;
   3 using System.Reflection;
   4 using System.Linq;
   5 using Tizen.NUI.Binding;
   6 using System.ComponentModel;
   7
   8 namespace Tizen.NUI.Xaml
   9 {
  10     /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
  11     [EditorBrowsable(EditorBrowsableState.Never)]
  12     [ContentProperty("Key")]
  13     public sealed class StaticResourceExtension : IMarkupExtension
  14     {
  15         /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
  16         [EditorBrowsable(EditorBrowsableState.Never)]
  17         public string Key { get; set; }
  18
  19         /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
  20         [EditorBrowsable(EditorBrowsableState.Never)]
  21         public object ProvideValue(IServiceProvider serviceProvider)
  22         {
  23             if (serviceProvider == null)
  24                 throw new ArgumentNullException(nameof(serviceProvider));
  25             if (Key == null)
  26             {
  27                 var lineInfoProvider = serviceProvider.GetService(typeof(IXmlLineInfoProvider)) as IXmlLineInfoProvider;
  28                 var lineInfo = (lineInfoProvider != null) ? lineInfoProvider.XmlLineInfo : new XmlLineInfo();
  29                 throw new XamlParseException("you must specify a key in {StaticResource}", lineInfo);
  30             }
  31             var valueProvider = serviceProvider.GetService(typeof(IProvideValueTarget)) as IProvideParentValues;
  32             if (valueProvider == null)
  33                 throw new ArgumentException(nameof(valueProvider));
  34             var xmlLineInfoProvider = serviceProvider.GetService(typeof(IXmlLineInfoProvider)) as IXmlLineInfoProvider;
  35             var xmlLineInfo = xmlLineInfoProvider != null ? xmlLineInfoProvider.XmlLineInfo : null;
  36             object resource = null;
  37
  38             foreach (var p in valueProvider.ParentObjects)
  39             {
  40                 var irp = p as IResourcesProvider;
  41                 var resDict = irp != null && irp.IsResourcesCreated ? irp.XamlResources : p as ResourceDictionary;
  42                 if (resDict == null)
  43                     continue;
  44                 if (resDict.TryGetValue(Key, out resource))
  45                     break;
  46             }
  47             resource = resource ?? GetApplicationLevelResource(Key, xmlLineInfo);
  48
  49             var bp = valueProvider.TargetProperty as BindableProperty;
  50             var pi = valueProvider.TargetProperty as PropertyInfo;
  51             var propertyType = bp?.ReturnType ?? pi?.PropertyType;
  52             if (propertyType == null)
  53             {
  54                 if (resource != null)
  55                 {
  56                     if (resource.GetType().GetTypeInfo().IsGenericType && (resource.GetType().GetGenericTypeDefinition() == typeof(OnPlatform<>) || resource.GetType().GetGenericTypeDefinition() == typeof(OnIdiom<>)))
  57                     {
  58                         // This is only there to support our backward compat story with pre 2.3.3 compiled Xaml project who was not providing TargetProperty
  59                         var method = resource.GetType().GetRuntimeMethod("op_Implicit", new[] { resource.GetType() });
  60                         if (method != null)
  61                         {
  62                             resource = method.Invoke(null, new[] { resource });
  63                         }
  64                     }
  65                 }
  66                 return resource;
  67             }
  68             if (propertyType.IsAssignableFrom(resource?.GetType()))
  69                 return resource;
  70             var implicit_op = resource?.GetType().GetImplicitConversionOperator(fromType: resource?.GetType(), toType: propertyType)
  71                             ?? propertyType.GetImplicitConversionOperator(fromType: resource?.GetType(), toType: propertyType);
  72             if (implicit_op != null)
  73                 return implicit_op.Invoke(resource, new[] { resource });
  74
  75             if (resource != null)
  76             {
  77                 //Special case for https://bugzilla.xamarin.com/show_bug.cgi?id=59818
  78                 //On OnPlatform, check for an opImplicit from the targetType
  79                 if (Device.Flags != null
  80                     && Device.Flags.Contains("xamlDoubleImplicitOpHack")
  81                     && resource.GetType().GetTypeInfo().IsGenericType
  82                     && (resource.GetType().GetGenericTypeDefinition() == typeof(OnPlatform<>)))
  83                 {
  84                     var tType = resource.GetType().GenericTypeArguments[0];
  85                     var opImplicit = tType.GetImplicitConversionOperator(fromType: tType, toType: propertyType)
  86                                     ?? propertyType.GetImplicitConversionOperator(fromType: tType, toType: propertyType);
  87
  88                     if (opImplicit != null)
  89                     {
  90                         //convert the OnPlatform<T> to T
  91                         var opPlatformImplicitConversionOperator = resource?.GetType().GetImplicitConversionOperator(fromType: resource?.GetType(), toType: tType);
  92                         resource = opPlatformImplicitConversionOperator?.Invoke(null, new[] { resource });
  93
  94                         //and convert to toType
  95                         resource = opImplicit.Invoke(null, new[] { resource });
  96                         return resource;
  97                     }
  98                 }
  99             }
 100             return resource;
 101         }
 102
 103         internal object GetApplicationLevelResource(string key, IXmlLineInfo xmlLineInfo)
 104         {
 105             object resource = null;
 106             if (Application.Current == null || !((IResourcesProvider)Application.Current).IsResourcesCreated || !Application.Current.XamlResources.TryGetValue(Key, out resource))
 107                 throw new XamlParseException($"StaticResource not found for key {Key}", xmlLineInfo);
 108             return resource;
 109         }
 110     }
 111 }