mcs/class/System.Xaml/System.Xaml/ValueSerializerContext.cs

   1 //
   2 // Copyright (C) 2010 Novell Inc. http://novell.com
   3 //
   4 // Permission is hereby granted, free of charge, to any person obtaining
   5 // a copy of this software and associated documentation files (the
   6 // "Software"), to deal in the Software without restriction, including
   7 // without limitation the rights to use, copy, modify, merge, publish,
   8 // distribute, sublicense, and/or sell copies of the Software, and to
   9 // permit persons to whom the Software is furnished to do so, subject to
  10 // the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be
  13 // included in all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22 //
  23
  24 using System;
  25 using System.Collections.Generic;
  26 using System.ComponentModel;
  27 using System.IO;
  28 using System.Linq;
  29 using System.Reflection;
  30 using System.Text;
  31 using System.Windows.Markup;
  32 using System.Xaml;
  33 using System.Xaml.Schema;
  34 using System.Xml;
  35
  36 namespace System.Xaml
  37 {
  38         internal class ValueSerializerContext : IValueSerializerContext, IXamlSchemaContextProvider
  39         {
  40                 XamlNameResolver name_resolver = new XamlNameResolver ();
  41                 XamlTypeResolver type_resolver;
  42                 NamespaceResolver namespace_resolver;
  43                 PrefixLookup prefix_lookup;
  44                 XamlSchemaContext sctx;
  45                 IAmbientProvider ambient_provider;
  46
  47                 public ValueSerializerContext (PrefixLookup prefixLookup, XamlSchemaContext schemaContext, IAmbientProvider ambientProvider)
  48                 {
  49                         if (prefixLookup == null)
  50                                 throw new ArgumentNullException ("prefixLookup");
  51                         if (schemaContext == null)
  52                                 throw new ArgumentNullException ("schemaContext");
  53                         prefix_lookup = prefixLookup;
  54                         namespace_resolver = new NamespaceResolver (prefix_lookup.Namespaces);
  55                         type_resolver = new XamlTypeResolver (namespace_resolver, schemaContext);
  56                         sctx = schemaContext;
  57                         ambient_provider = ambientProvider;
  58                 }
  59
  60                 public object GetService (Type serviceType)
  61                 {
  62                         if (serviceType == typeof (INamespacePrefixLookup))
  63                                 return prefix_lookup;
  64                         if (serviceType == typeof (IXamlNamespaceResolver))
  65                                 return namespace_resolver;
  66                         if (serviceType == typeof (IXamlNameResolver))
  67                                 return name_resolver;
  68                         if (serviceType == typeof (IXamlNameProvider))
  69                                 return name_resolver;
  70                         if (serviceType == typeof (IXamlTypeResolver))
  71                                 return type_resolver;
  72                         if (serviceType == typeof (IAmbientProvider))
  73                                 return ambient_provider;
  74                         if (serviceType == typeof (IXamlSchemaContextProvider))
  75                                 return this;
  76                         return null;
  77                 }
  78
  79                 XamlSchemaContext IXamlSchemaContextProvider.SchemaContext {
  80                         get { return sctx; }
  81                 }
  82
  83                 public IContainer Container {
  84                         get { throw new NotImplementedException (); }
  85                 }
  86                 public object Instance {
  87                         get { throw new NotImplementedException (); }
  88                 }
  89                 public PropertyDescriptor PropertyDescriptor {
  90                         get { throw new NotImplementedException (); }
  91                 }
  92                 public void OnComponentChanged ()
  93                 {
  94                         throw new NotImplementedException ();
  95                 }
  96                 public bool OnComponentChanging ()
  97                 {
  98                         throw new NotImplementedException ();
  99                 }
 100                 public ValueSerializer GetValueSerializerFor (PropertyDescriptor descriptor)
 101                 {
 102                         throw new NotImplementedException ();
 103                 }
 104                 public ValueSerializer GetValueSerializerFor (Type type)
 105                 {
 106                         throw new NotImplementedException ();
 107                 }
 108         }
 109
 110         internal class XamlTypeResolver : IXamlTypeResolver
 111         {
 112                 NamespaceResolver ns_resolver;
 113                 XamlSchemaContext schema_context;
 114
 115                 public XamlTypeResolver (NamespaceResolver namespaceResolver, XamlSchemaContext schemaContext)
 116                 {
 117                         ns_resolver = namespaceResolver;
 118                         schema_context = schemaContext;
 119                 }
 120
 121                 public Type Resolve (string typeName)
 122                 {
 123                         var tn = XamlTypeName.Parse (typeName, ns_resolver);
 124                         var xt = schema_context.GetXamlType (tn);
 125                         return xt != null ? xt.UnderlyingType : null;
 126                 }
 127         }
 128
 129         internal class NamespaceResolver : IXamlNamespaceResolver
 130         {
 131                 public NamespaceResolver (IList<NamespaceDeclaration> source)
 132                 {
 133                         this.source = source;
 134                 }
 135
 136                 IList<NamespaceDeclaration> source;
 137
 138                 public string GetNamespace (string prefix)
 139                 {
 140                         foreach (var nsd in source)
 141                                 if (nsd.Prefix == prefix)
 142                                         return nsd.Namespace;
 143                         return null;
 144                 }
 145
 146                 public IEnumerable<NamespaceDeclaration> GetNamespacePrefixes ()
 147                 {
 148                         return source;
 149                 }
 150         }
 151
 152         internal class AmbientProvider : IAmbientProvider
 153         {
 154                 List<AmbientPropertyValue> values = new List<AmbientPropertyValue> ();
 155                 Stack<AmbientPropertyValue> live_stack = new Stack<AmbientPropertyValue> ();
 156
 157                 public void Push (AmbientPropertyValue v)
 158                 {
 159                         live_stack.Push (v);
 160                         values.Add (v);
 161                 }
 162
 163                 public void Pop ()
 164                 {
 165                         live_stack.Pop ();
 166                 }
 167
 168                 public IEnumerable<object> GetAllAmbientValues (params XamlType [] types)
 169                 {
 170                         return GetAllAmbientValues (null, false, types);
 171                 }
 172
 173                 public IEnumerable<AmbientPropertyValue> GetAllAmbientValues (IEnumerable<XamlType> ceilingTypes, params XamlMember [] properties)
 174                 {
 175                         return GetAllAmbientValues (ceilingTypes, false, null, properties);
 176                 }
 177
 178                 public IEnumerable<AmbientPropertyValue> GetAllAmbientValues (IEnumerable<XamlType> ceilingTypes, bool searchLiveStackOnly, IEnumerable<XamlType> types, params XamlMember [] properties)
 179                 {
 180                         return DoGetAllAmbientValues (ceilingTypes, searchLiveStackOnly, types, properties).ToList ();
 181                 }
 182
 183                 IEnumerable<AmbientPropertyValue> DoGetAllAmbientValues (IEnumerable<XamlType> ceilingTypes, bool searchLiveStackOnly, IEnumerable<XamlType> types, params XamlMember [] properties)
 184                 {
 185                         if (searchLiveStackOnly) {
 186                                 if (live_stack.Count > 0) {
 187                                         // pop, call recursively, then push back.
 188                                         var p = live_stack.Pop ();
 189                                         if (p.RetrievedProperty != null && ceilingTypes != null && ceilingTypes.Contains (p.RetrievedProperty.Type))
 190                                                 yield break;
 191                                         if (DoesAmbientPropertyApply (p, types, properties))
 192                                                 yield return p;
 193
 194                                         foreach (var i in GetAllAmbientValues (ceilingTypes, searchLiveStackOnly, types, properties))
 195                                                 yield return i;
 196
 197                                         live_stack.Push (p);
 198                                 }
 199                         } else {
 200                                 // FIXME: does ceilingTypes matter?
 201                                 foreach (var p in values)
 202                                         if (DoesAmbientPropertyApply (p, types, properties))
 203                                                 yield return p;
 204                         }
 205                 }
 206
 207                 bool DoesAmbientPropertyApply (AmbientPropertyValue p, IEnumerable<XamlType> types, params XamlMember [] properties)
 208                 {
 209                         if (types == null || !types.Any () || types.Any (xt => xt.UnderlyingType != null && xt.UnderlyingType.IsInstanceOfType (p.Value)))
 210                                 if (properties == null || !properties.Any () || properties.Contains (p.RetrievedProperty))
 211                                         return true;
 212                         return false;
 213                 }
 214
 215                 public object GetFirstAmbientValue (params XamlType [] types)
 216                 {
 217                         foreach (var obj in GetAllAmbientValues (types))
 218                                 return obj;
 219                         return null;
 220                 }
 221
 222                 public AmbientPropertyValue GetFirstAmbientValue (IEnumerable<XamlType> ceilingTypes, params XamlMember [] properties)
 223                 {
 224                         foreach (var obj in GetAllAmbientValues (ceilingTypes, properties))
 225                                 return obj;
 226                         return null;
 227                 }
 228         }
 229 }