src/Tizen.NUI.Xaml/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.XamlBinding.Internals;
   8 using Tizen.NUI.Xaml;
   9
  10 namespace Tizen.NUI.XamlBinding
  11 {
  12     /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
  13     [EditorBrowsable(EditorBrowsableState.Never)]
  14     [ContentProperty("Value")]
  15     [ProvideCompiled("Tizen.NUI.XamlC.SetterValueProvider")]
  16     public sealed class Setter : IValueProvider
  17     {
  18         readonly ConditionalWeakTable<BindableObject, object> _originalValues = new ConditionalWeakTable<BindableObject, object>();
  19
  20         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
  21         [EditorBrowsable(EditorBrowsableState.Never)]
  22         public BindableProperty Property { get; set; }
  23
  24         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
  25         [EditorBrowsable(EditorBrowsableState.Never)]
  26         public object Value { get; set; }
  27
  28         object IValueProvider.ProvideValue(IServiceProvider serviceProvider)
  29         {
  30             if (Property == null)
  31             {
  32                 var lineInfoProvider = serviceProvider.GetService(typeof(IXmlLineInfoProvider)) as IXmlLineInfoProvider;
  33                 IXmlLineInfo lineInfo = lineInfoProvider != null ? lineInfoProvider.XmlLineInfo : new XmlLineInfo();
  34                 throw new XamlParseException("Property not set", lineInfo);
  35             }
  36             var valueconverter = serviceProvider.GetService(typeof(IValueConverterProvider)) as IValueConverterProvider;
  37
  38             Func<MemberInfo> minforetriever =
  39                 () =>
  40                 (MemberInfo)Property.DeclaringType.GetRuntimeProperty(Property.PropertyName) ?? (MemberInfo)Property.DeclaringType.GetRuntimeMethod("Get" + Property.PropertyName, new[] { typeof(BindableObject) });
  41
  42             object value = valueconverter.Convert(Value, Property.ReturnType, minforetriever, serviceProvider);
  43             Value = value;
  44             return this;
  45         }
  46
  47         internal void Apply(BindableObject target, bool fromStyle = false)
  48         {
  49             if (target == null)
  50                 throw new ArgumentNullException("target");
  51             if (Property == null)
  52                 return;
  53
  54             object originalValue = target.GetValue(Property);
  55             if (!Equals(originalValue, Property.DefaultValue))
  56             {
  57                 _originalValues.Remove(target);
  58                 _originalValues.Add(target, originalValue);
  59             }
  60
  61             var dynamicResource = Value as DynamicResource;
  62             var binding = Value as BindingBase;
  63             if (binding != null)
  64                 target.SetBinding(Property, binding.Clone(), fromStyle);
  65             else if (dynamicResource != null)
  66                 target.SetDynamicResource(Property, dynamicResource.Key, fromStyle);
  67             else
  68             {
  69                 if (Value is IList<VisualStateGroup> visualStateGroupCollection)
  70                     target.SetValue(Property, visualStateGroupCollection.Clone(), fromStyle);
  71                 else
  72                     target.SetValue(Property, Value, fromStyle);
  73             }
  74         }
  75
  76         internal void UnApply(BindableObject target, bool fromStyle = false)
  77         {
  78             if (target == null)
  79                 throw new ArgumentNullException(nameof(target));
  80             if (Property == null)
  81                 return;
  82
  83             object actual = target.GetValue(Property);
  84             if (!Equals(actual, Value) && !(Value is Tizen.NUI.XamlBinding.Binding) && !(Value is DynamicResource))
  85             {
  86                 //Do not reset default value if the value has been changed
  87                 _originalValues.Remove(target);
  88                 return;
  89             }
  90
  91             object defaultValue;
  92             if (_originalValues.TryGetValue(target, out defaultValue))
  93             {
  94                 //reset default value, unapply bindings and dynamicResource
  95                 target.SetValue(Property, defaultValue, fromStyle);
  96                 _originalValues.Remove(target);
  97             }
  98             else
  99                 target.ClearValue(Property);
 100         }
 101     }
 102 }