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                 var lineInfoProvider = serviceProvider.GetService(typeof(IXmlLineInfoProvider)) as IXmlLineInfoProvider;
  27                 var lineInfo = (lineInfoProvider != null) ? lineInfoProvider.XmlLineInfo : new XmlLineInfo();
  28                 throw new XamlParseException("you must specify a key in {StaticResource}", lineInfo);
  29             }
  30             var valueProvider = serviceProvider.GetService(typeof(IProvideValueTarget)) as IProvideParentValues;
  31             if (valueProvider == null)
  32                 throw new ArgumentException();
  33             var xmlLineInfoProvider = serviceProvider.GetService(typeof(IXmlLineInfoProvider)) as IXmlLineInfoProvider;
  34             var xmlLineInfo = xmlLineInfoProvider != null ? xmlLineInfoProvider.XmlLineInfo : null;
  35             object resource = null;
  36
  37             foreach (var p in valueProvider.ParentObjects) {
  38                 var irp = p as IResourcesProvider;
  39                 var resDict = irp != null && irp.IsResourcesCreated ? irp.XamlResources : p as ResourceDictionary;
  40                 if (resDict == null)
  41                     continue;
  42                 if (resDict.TryGetValue(Key, out resource))
  43                     break;
  44             }
  45             resource = resource ?? GetApplicationLevelResource(Key, xmlLineInfo);
  46
  47             var bp = valueProvider.TargetProperty as BindableProperty;
  48             var pi = valueProvider.TargetProperty as PropertyInfo;
  49             var propertyType = bp?.ReturnType ?? pi?.PropertyType;
  50             if (propertyType == null) {
  51                 if (resource != null) {
  52                     if (resource.GetType().GetTypeInfo().IsGenericType && (resource.GetType().GetGenericTypeDefinition() == typeof(OnPlatform<>) || resource.GetType().GetGenericTypeDefinition() == typeof(OnIdiom<>))) {
  53                         // This is only there to support our backward compat story with pre 2.3.3 compiled Xaml project who was not providing TargetProperty
  54                         var method = resource.GetType().GetRuntimeMethod("op_Implicit", new[] { resource.GetType() });
  55                         if (method != null) {
  56                             resource = method.Invoke(null, new[] { resource });
  57                         }
  58                     }
  59                 }
  60                 return resource;
  61             }
  62             if (propertyType.IsAssignableFrom(resource?.GetType()))
  63                 return resource;
  64             var implicit_op =  resource?.GetType().GetImplicitConversionOperator(fromType: resource?.GetType(), toType: propertyType)
  65                             ?? propertyType.GetImplicitConversionOperator(fromType: resource?.GetType(), toType: propertyType);
  66             if (implicit_op != null)
  67                 return implicit_op.Invoke(resource, new [] { resource });
  68
  69             if (resource != null) {
  70                 //Special case for https://bugzilla.xamarin.com/show_bug.cgi?id=59818
  71                 //On OnPlatform, check for an opImplicit from the targetType
  72                 if (   Device.Flags != null
  73                     && Device.Flags.Contains("xamlDoubleImplicitOpHack")
  74                     && resource.GetType().GetTypeInfo().IsGenericType
  75                     && (resource.GetType().GetGenericTypeDefinition() == typeof(OnPlatform<>))) {
  76                     var tType = resource.GetType().GenericTypeArguments[0];
  77                     var opImplicit = tType.GetImplicitConversionOperator(fromType: tType, toType: propertyType)
  78                                     ?? propertyType.GetImplicitConversionOperator(fromType: tType, toType: propertyType);
  79
  80                     if (opImplicit != null) {
  81                         //convert the OnPlatform<T> to T
  82                         var opPlatformImplicitConversionOperator = resource?.GetType().GetImplicitConversionOperator(fromType: resource?.GetType(), toType: tType);
  83                         resource = opPlatformImplicitConversionOperator?.Invoke(null, new[] { resource });
  84
  85                         //and convert to toType
  86                         resource = opImplicit.Invoke(null, new[] { resource });
  87                         return resource;
  88                     }
  89                 }
  90             }
  91             return resource;
  92         }
  93
  94         internal object GetApplicationLevelResource(string key, IXmlLineInfo xmlLineInfo)
  95         {
  96             object resource = null;
  97             if (Application.Current == null || !((IResourcesProvider)Application.Current).IsResourcesCreated || !Application.Current.XamlResources.TryGetValue(Key, out resource))
  98                 throw new XamlParseException($"StaticResource not found for key {Key}", xmlLineInfo);
  99             return resource;
 100         }
 101     }
 102 }