src/Tizen.NUI/src/public/XamlBinding/Setter.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.ComponentModel;
   4 using System.Reflection;
   5 using System.Runtime.CompilerServices;
   6 using System.Xml;
   7 using Tizen.NUI.Binding.Internals;
   8 using Tizen.NUI.Xaml;
   9
  10 namespace Tizen.NUI.Binding
  11 {
  12     /// <since_tizen> 6 </since_tizen>
  13     /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
  14     [EditorBrowsable(EditorBrowsableState.Never)]
  15     [ContentProperty("Value")]
  16     [ProvideCompiled("Tizen.NUI.Core.XamlC.SetterValueProvider")]
  17     public sealed class Setter : IValueProvider
  18     {
  19         readonly ConditionalWeakTable<BindableObject, object> _originalValues = new ConditionalWeakTable<BindableObject, object>();
  20
  21         /// <since_tizen> 6 </since_tizen>
  22         /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
  23         [EditorBrowsable(EditorBrowsableState.Never)]
  24         public BindableProperty Property { get; set; }
  25
  26         /// <since_tizen> 6 </since_tizen>
  27         /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
  28         [EditorBrowsable(EditorBrowsableState.Never)]
  29         public object Value { get; set; }
  30
  31         object IValueProvider.ProvideValue(IServiceProvider serviceProvider)
  32         {
  33             if (Property == null)
  34             {
  35                 var lineInfoProvider = serviceProvider.GetService(typeof(IXmlLineInfoProvider)) as IXmlLineInfoProvider;
  36                 IXmlLineInfo lineInfo = lineInfoProvider != null ? lineInfoProvider.XmlLineInfo : new XmlLineInfo();
  37                 throw new XamlParseException("Property not set", lineInfo);
  38             }
  39             var valueconverter = serviceProvider.GetService(typeof(IValueConverterProvider)) as IValueConverterProvider;
  40
  41             Func<MemberInfo> minforetriever =
  42                 () =>
  43                 (MemberInfo)Property.DeclaringType.GetRuntimeProperty(Property.PropertyName) ?? (MemberInfo)Property.DeclaringType.GetRuntimeMethod("Get" + Property.PropertyName, new[] { typeof(BindableObject) });
  44
  45             object value = valueconverter?.Convert(Value, Property.ReturnType, minforetriever, serviceProvider);
  46             Value = value;
  47             return this;
  48         }
  49
  50         internal void Apply(BindableObject target, bool fromStyle = false)
  51         {
  52             if (target == null)
  53                 throw new ArgumentNullException("target");
  54             if (Property == null)
  55                 return;
  56
  57             object originalValue = target.GetValue(Property);
  58             if (!Equals(originalValue, Property.DefaultValue))
  59             {
  60                 _originalValues.Remove(target);
  61                 _originalValues.Add(target, originalValue);
  62             }
  63
  64             var dynamicResource = Value as DynamicResource;
  65             var binding = Value as BindingBase;
  66             if (binding != null)
  67                 target.SetBinding(Property, binding.Clone(), fromStyle);
  68             else if (dynamicResource != null)
  69                 target.SetDynamicResource(Property, dynamicResource.Key, fromStyle);
  70             else
  71             {
  72                 if (Value is IList<VisualStateGroup> visualStateGroupCollection)
  73                     target.SetValue(Property, visualStateGroupCollection.Clone(), fromStyle);
  74                 else
  75                     target.SetValue(Property, Value, fromStyle);
  76             }
  77         }
  78
  79         internal void UnApply(BindableObject target, bool fromStyle = false)
  80         {
  81             if (target == null)
  82                 throw new ArgumentNullException(nameof(target));
  83             if (Property == null)
  84                 return;
  85
  86             object actual = target.GetValue(Property);
  87             if (!Equals(actual, Value) && !(Value is Tizen.NUI.Binding.Binding) && !(Value is DynamicResource))
  88             {
  89                 //Do not reset default value if the value has been changed
  90                 _originalValues.Remove(target);
  91                 return;
  92             }
  93
  94             object defaultValue;
  95             if (_originalValues.TryGetValue(target, out defaultValue))
  96             {
  97                 //reset default value, unapply bindings and dynamicResource
  98                 target.SetValue(Property, defaultValue, fromStyle);
  99                 _originalValues.Remove(target);
 100             }
 101             else
 102                 target.ClearValue(Property);
 103         }
 104     }
 105 }