public object GetClrValue(Type propertyType, string propertyValueString)
{
if (!(propertyType.GetTypeInfo()
.IsAssignableFrom(propertyValueString.GetType().GetTypeInfo())))
{
TypeConverter converter = null;
converter = typeConverterProvider.GetConverterFromProperty(propertyValueString, propertyType);
if (converter == null)
{
converter = typeConverterProvider.GetConverter(propertyType);
}
if (converter != null)
{
return(converter.ConvertFromInvariantString(propertyValueString));
}
else if (propertyType == typeof(bool))
{
return(propertyValueString.Equals("true"));
}
else if (propertyType == typeof(Color))
{
return(Color.FromHex(propertyValueString as string));
}
else if (propertyType == typeof(LayoutOptions))
{
return(propertyType.GetFieldReliable(propertyValueString).GetValue(null));
}
else if (propertyType.GetTypeInfo().IsEnum)
{
return(Enum.Parse(propertyType, propertyValueString as string));
}
else
{
return(Convert.ChangeType(propertyValueString, propertyType));
}
}
return(propertyValueString);
}
private Xamarin.Forms.TriggerAction CreateTriggerAction(StyleSheet styleSheet, BindableObject styleResourceReferenceHolder, TriggerAction action)
{
var actionTypeName = typeNameResolver.ResolveFullTypeName(styleSheet.Namespaces, action.Action);
var actionType = Type.GetType(actionTypeName);
var nativeTriggerAction = (Xamarin.Forms.TriggerAction)Activator.CreateInstance(actionType);
foreach (var parameter in action.Parameters)
{
var parameterName = parameter.Property;
object value = null;
var parameterValueExpression = parameter.Value.Trim(); //.Substring(parameterName.Length + 1).Trim();
BindableProperty depProp;
var type = typeNameResolver.GetClrPropertyType(styleSheet.Namespaces, nativeTriggerAction, parameterName);
if (typeNameResolver.IsMarkupExtension(parameterValueExpression))
{
value = typeNameResolver.GetMarkupExtensionValue(styleResourceReferenceHolder, parameterValueExpression, styleSheet.Namespaces);
}
else if ((depProp = typeNameResolver.GetDependencyProperty(styleSheet.Namespaces, actionType, parameterName)) != null)
{
value = typeNameResolver.GetPropertyValue(actionType, styleResourceReferenceHolder, parameterValueExpression, depProp, styleSheet.Namespaces);
}
else
{
value = parameterValueExpression;
}
if (value is string valueString)
{
value = typeConverterProvider.GetConverter(type)?.ConvertFromInvariantString(valueString) ?? value;
}
nativeTriggerAction.GetType().GetRuntimeProperty(parameterName).SetValue(nativeTriggerAction, value);
}
return(nativeTriggerAction);
}
public override BindableObject CreateTrigger(StyleSheet styleSheet, ITrigger trigger, Type targetType, BindableObject styleResourceReferenceHolder)
{
if (trigger == null)
{
throw new ArgumentNullException(nameof(trigger));
}
if (trigger is Trigger)
{
var propertyTrigger = trigger as Trigger;
var nativeTrigger = new Xamarin.Forms.Trigger(targetType);
var bindableProperty = dependencyService.GetBindableProperty(targetType, propertyTrigger.Property);
if (bindableProperty == null)
{
throw new NullReferenceException($"Property '{propertyTrigger.Property}' may not be null (targetType '{targetType.Name}')!");
}
nativeTrigger.Property = bindableProperty;
nativeTrigger.Value = dependencyService.GetBindablePropertyValue(targetType, nativeTrigger.Property, propertyTrigger.Value);
foreach (var styleDeclaration in propertyTrigger.StyleDeclaraionBlock)
{
var property = typeNameResolver.GetDependencyProperty(styleSheet.Namespaces, targetType, styleDeclaration.Property);
if (property == null)
{
continue;
}
var value = typeNameResolver.GetPropertyValue(targetType, styleResourceReferenceHolder, styleDeclaration.Value, property);
nativeTrigger.Setters.Add(new Setter {
Property = property, Value = value
});
}
return(nativeTrigger);
}
else if (trigger is DataTrigger)
{
var dataTrigger = trigger as DataTrigger;
var nativeTrigger = new Xamarin.Forms.DataTrigger(targetType);
var expression = "{Binding " + dataTrigger.Binding + "}";
var binding = (Binding)markupExtensionParser.ProvideValue(expression, null);
nativeTrigger.Binding = binding;
nativeTrigger.Value = GetBasicValue(dataTrigger);
foreach (var styleDeclaration in dataTrigger.StyleDeclarationBlock)
{
var property = typeNameResolver.GetDependencyProperty(styleSheet.Namespaces, targetType, styleDeclaration.Property);
if (property == null)
{
continue;
}
var value = typeNameResolver.GetPropertyValue(targetType, styleResourceReferenceHolder, styleDeclaration.Value, property);
nativeTrigger.Setters.Add(new Setter {
Property = property, Value = value
});
}
return(nativeTrigger);
}
else if (trigger is EventTrigger)
{
var eventTrigger = trigger as EventTrigger;
var nativeTrigger = new Xamarin.Forms.EventTrigger();
nativeTrigger.Event = eventTrigger.Event;
foreach (var action in eventTrigger.Actions)
{
var actionTypeName = typeNameResolver.ResolveFullTypeName(styleSheet.Namespaces, action.Action);
var actionType = Type.GetType(actionTypeName);
var triggerAction = (Xamarin.Forms.TriggerAction)Activator.CreateInstance(actionType);
var parameters = action.Parameters.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries)
.Select(x => x.Trim())
.ToList();
foreach (var parameter in parameters)
{
var parameterName = parameter.Split(' ')[0];
object value = null;
var parameterValueExpression = parameter.Substring(parameterName.Length + 1).Trim();
BindableProperty depProp;
var type = typeNameResolver.GetClrPropertyType(styleSheet.Namespaces, triggerAction, parameterName);
if (typeNameResolver.IsMarkupExtension(parameterValueExpression))
{
value = typeNameResolver.GetMarkupExtensionValue(styleResourceReferenceHolder, parameterValueExpression);
}
else if ((depProp = typeNameResolver.GetDependencyProperty(styleSheet.Namespaces, actionType, parameterName)) != null)
{
value = typeNameResolver.GetPropertyValue(actionType, styleResourceReferenceHolder, parameterValueExpression, depProp);
}
else
{
value = parameterValueExpression;
}
if (value is string valueString)
{
value = typeConverterProvider.GetConverter(type)?.ConvertFromInvariantString(valueString) ?? value;
}
triggerAction.GetType().GetRuntimeProperty(parameterName).SetValue(triggerAction, value);
}
nativeTrigger.Actions.Add(triggerAction);
}
return(nativeTrigger);
}
throw new NotSupportedException($"Trigger '{trigger.GetType().FullName}' is not supported!");
}