void InitializeDataContext(Element xmlNode, FrameworkElement instance, FrameworkElement parentInstance)
{
if (_isBuildingTemplate)
{
instance.DataContext = DataContext;
return;
}
var subControlDataContextAttribute = xmlNode.Attributes["DataContext"];
if (subControlDataContextAttribute == null)
{
var bindingInfo = new BindingInfo
{
BindingMode = BindingMode.OneWay,
Source = parentInstance,
SourcePath = "DataContext",
Target = instance,
TargetPath = "DataContext"
};
bindingInfo.Connect();
return;
}
var bi = BindingInfo.TryParseExpression(subControlDataContextAttribute.NodeValue);
if (bi == null)
{
throw new InvalidOperationException("InvalidBindingExpression:" + subControlDataContextAttribute.NodeValue);
}
bi.BindingMode = BindingMode.OneWay;
bi.Source = parentInstance;
bi.SourcePath = "DataContext." + bi.SourcePath.Path;
bi.Target = instance;
bi.TargetPath = "DataContext";
bi.Connect();
}
internal override List<BindingInfo> CreateBindings(FrameworkElement element, object dataItem, bool twoWay)
{
BindingInfo bindingData = new BindingInfo();
if (twoWay && this.BindingTarget != null)
{
bindingData.BindingExpression = element.GetBindingExpression(this.BindingTarget);
if (bindingData.BindingExpression != null)
{
bindingData.BindingTarget = this.BindingTarget;
bindingData.Element = element;
return new List<BindingInfo> { bindingData };
}
}
foreach (DependencyProperty bindingTarget in element.GetDependencyProperties(false))
{
bindingData.BindingExpression = element.GetBindingExpression(bindingTarget);
if (bindingData.BindingExpression != null
&& bindingData.BindingExpression.ParentBinding == this.Binding)
{
this.BindingTarget = bindingTarget;
bindingData.BindingTarget = this.BindingTarget;
bindingData.Element = element;
return new List<BindingInfo> { bindingData };
}
}
return base.CreateBindings(element, dataItem, twoWay);
}
void ProcessAttribute(object instance, string name, string value)
{
var nameUpperCase = name.ToUpperCase();
if (nameUpperCase == "DATACONTEXT" || name == AttributeName_d_designerdataContext)
{
return;
}
if (name == "class")
{
name = "Class";
}
var targetProperty = ReflectionHelper.FindProperty(instance, name, FindPropertyFlag);
if (targetProperty != null && name != targetProperty.Name)
{
name = targetProperty.Name;
}
var bi = BindingInfo.TryParseExpression(value);
if (bi != null)
{
var eventInfo = ReflectionHelper.FindEvent(instance, name, FindPropertyFlag);
if (eventInfo != null)
{
var methodInfo = ReflectionHelper.GetMethodInfo(DataContext, bi.SourcePath.Path);
var handler = Delegate.CreateDelegate(eventInfo.AddMethod.ParameterTypes.First(), DataContext, methodInfo);
eventInfo.AddEventHandler(instance, handler);
return;
}
if (name.Contains(".") == false)
{
if (targetProperty == null)
{
var htmlBindingInfo = new HTMLBindingInfo
{
Source = instance,
SourcePath = new PropertyPath("DataContext." + bi.SourcePath.Path),
Target = instance.As <FrameworkElement>()._root,
TargetPath = name,
BindingMode = BindingMode.OneWay
};
if (bi.BindingMode == BindingMode.TwoWay && HTMLBindingInfo.TargetCanUpdateSource(htmlBindingInfo.Target))
{
htmlBindingInfo.BindingMode = BindingMode.TwoWay;
}
htmlBindingInfo.Connect();
return;
}
}
bi.SourcePath = new PropertyPath("DataContext." + bi.SourcePath.Path);
bi.Source = instance;
bi.Target = instance;
bi.TargetPath = name;
bi.Connect();
return;
}
if (targetProperty != null)
{
if (targetProperty.PropertyType.IsEnum)
{
ReflectionHelper.SetPropertyValue(instance, name, Enum.Parse(targetProperty.PropertyType, value, true));
return;
}
var converterAttributes = targetProperty.GetCustomAttributes(typeof(TypeConverterAttribute));
var firstConverterAtribute = converterAttributes?.FirstOrDefault();
if (firstConverterAtribute != null)
{
var converter = (TypeConverterAttribute)firstConverterAtribute;
var valueConverter = (IValueConverter)Activator.CreateInstance(converter._type);
var convertedValue = valueConverter.Convert(value, targetProperty.PropertyType, null, CultureInfo.CurrentCulture);
ReflectionHelper.SetPropertyValue(instance, targetProperty.Name, convertedValue);
return;
}
var propertyValue = Cast.To(value, targetProperty.PropertyType, CultureInfo.CurrentCulture);
ReflectionHelper.SetPropertyValue(instance, targetProperty.Name, propertyValue);
return;
}
if (name.StartsWith("on."))
{
var eventName = name.RemoveFromStart("on.");
// support this format: this.Notify(OnContactClicked)
if (value.StartsWith("this."))
{
var viewInvocationExpressionInfo = ViewInvocationExpressionInfo.Parse(value);
var methodName = viewInvocationExpressionInfo.MethodName;
var mi = Caller.GetType().GetMethod(methodName, BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
instance.As <FrameworkElement>().On(eventName, () =>
{
if (mi == null)
{
throw new MissingMemberException(Caller.GetType().FullName + "->" + methodName);
}
mi.Invoke(Caller, viewInvocationExpressionInfo.Parameters.ToArray());
});
return;
}
var methodInfo = Caller.GetType().GetMethod(value, ReflectionHelper.AllBindings);
instance.As <FrameworkElement>().On(eventName, () =>
{
if (methodInfo == null)
{
throw new MissingMemberException(Caller.GetType().FullName + "::" + value);
}
methodInfo.Invoke(Caller);
});
return;
}
if (nameUpperCase.StartsWith("CSS."))
{
var styleAttributeName = name.Substring(4);
instance.As <FrameworkElement>()._root.Css(styleAttributeName, value);
return;
}
if (nameUpperCase == "X.NAME" || nameUpperCase == "X:NAME")
{
ReflectionHelper.SetNonStaticField(Caller, value, instance);
return;
}
instance.As <FrameworkElement>()._root.Attr(name, value);
}
