/// <summary>
/// This method actually performs the serialization. When the member is serialized
/// the necessary statements will be added to the statements collection.
/// </summary>
public override void Serialize(IDesignerSerializationManager manager, object value, MemberDescriptor descriptor, CodeStatementCollection statements)
{
if (manager == null)
{
throw new ArgumentNullException(nameof(manager));
}
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
if (!(descriptor is EventDescriptor eventToSerialize))
{
throw new ArgumentNullException(nameof(descriptor));
}
if (statements == null)
{
throw new ArgumentNullException(nameof(statements));
}
try
{
// If the IEventBindingService is not available, we don't throw - we just don't do anything.
if (manager.GetService(typeof(IEventBindingService)) is IEventBindingService eventBindings)
{
PropertyDescriptor prop = eventBindings.GetEventProperty(eventToSerialize);
string methodName = (string)prop.GetValue(value);
if (methodName != null)
{
CodeDomSerializer.Trace("Event {0} bound to {1}", eventToSerialize.Name, methodName);
CodeExpression eventTarget = SerializeToExpression(manager, value);
CodeDomSerializer.TraceWarningIf(eventTarget == null, "Object has no name and no propery ref in context so we cannot serialize events: {0}", value);
if (eventTarget != null)
{
CodeTypeReference delegateTypeRef = new CodeTypeReference(eventToSerialize.EventType);
CodeDelegateCreateExpression delegateCreate = new CodeDelegateCreateExpression(delegateTypeRef, _thisRef, methodName);
CodeEventReferenceExpression eventRef = new CodeEventReferenceExpression(eventTarget, eventToSerialize.Name);
CodeAttachEventStatement attach = new CodeAttachEventStatement(eventRef, delegateCreate);
attach.UserData[typeof(Delegate)] = eventToSerialize.EventType;
statements.Add(attach);
}
}
}
}
catch (Exception e)
{
// Since we usually go through reflection, don't
// show what our engine does, show what caused
// the problem.
//
if (e is TargetInvocationException)
{
e = e.InnerException;
}
manager.ReportError(new CodeDomSerializerException(string.Format(SR.SerializerPropertyGenFailed, eventToSerialize.Name, e.Message), manager));
}
}
/// <summary>
/// This serializes the given property on this object.
/// </summary>
private void SerializeNormalProperty(IDesignerSerializationManager manager, object value, PropertyDescriptor property, CodeStatementCollection statements)
{
using (CodeDomSerializer.TraceScope("CodeDomSerializer::" + nameof(SerializeProperty)))
{
CodeExpression target = SerializeToExpression(manager, value);
CodeDomSerializer.TraceWarningIf(target == null, "Unable to serialize target for property {0}", property.Name);
if (target != null)
{
CodeExpression propertyRef = new CodePropertyReferenceExpression(target, property.Name);
CodeExpression serializedPropertyValue = null;
// First check for a member relationship service to see if this property
// is related to another member. If it is, then we will use that
// relationship to construct the property assign statement. if
// it isn't, then we're serialize ourselves.
if (manager.GetService(typeof(MemberRelationshipService)) is MemberRelationshipService relationships)
{
MemberRelationship relationship = relationships[value, property];
if (relationship != MemberRelationship.Empty)
{
CodeExpression rhsTarget = SerializeToExpression(manager, relationship.Owner);
if (rhsTarget != null)
{
serializedPropertyValue = new CodePropertyReferenceExpression(rhsTarget, relationship.Member.Name);
}
}
}
if (serializedPropertyValue == null)
{
// Serialize the value of this property into a code expression. If we can't get one,
// then we won't serialize the property.
//
object propValue = GetPropertyValue(manager, property, value, out bool validValue);
if (validValue)
{
ExpressionContext tree = null;
if (propValue != value)
{
// make sure the value isn't the object or we'll end up printing
// this property instead of the value.
tree = new ExpressionContext(propertyRef, property.PropertyType, value);
manager.Context.Push(tree);
}
try
{
serializedPropertyValue = SerializeToExpression(manager, propValue);
}
finally
{
if (tree != null)
{
Debug.Assert(manager.Context.Current == tree, "Context stack corrupted.");
manager.Context.Pop();
}
}
}
}
if (serializedPropertyValue != null)
{
CodeAssignStatement assign = new CodeAssignStatement(propertyRef, serializedPropertyValue);
statements.Add(assign);
}
}
}
}
/// <summary>
/// This serializes the given property on this object.
/// </summary>
private void SerializeExtenderProperty(IDesignerSerializationManager manager, object value, PropertyDescriptor property, CodeStatementCollection statements)
{
AttributeCollection attributes = property.Attributes;
using (CodeDomSerializer.TraceScope("PropertyMemberCodeDomSerializer::" + nameof(SerializeExtenderProperty)))
{
ExtenderProvidedPropertyAttribute exAttr = (ExtenderProvidedPropertyAttribute)attributes[typeof(ExtenderProvidedPropertyAttribute)];
// Extender properties are method invokes on a target "extender" object.
//
CodeExpression extender = SerializeToExpression(manager, exAttr.Provider);
CodeExpression extended = SerializeToExpression(manager, value);
CodeDomSerializer.TraceWarningIf(extender == null, "Extender object {0} could not be serialized.", manager.GetName(exAttr.Provider));
CodeDomSerializer.TraceWarningIf(extended == null, "Extended object {0} could not be serialized.", manager.GetName(value));
if (extender != null && extended != null)
{
CodeMethodReferenceExpression methodRef = new CodeMethodReferenceExpression(extender, "Set" + property.Name);
object propValue = GetPropertyValue(manager, property, value, out bool validValue);
CodeExpression serializedPropertyValue = null;
// Serialize the value of this property into a code expression. If we can't get one,
// then we won't serialize the property.
if (validValue)
{
ExpressionContext tree = null;
if (propValue != value)
{
// make sure the value isn't the object or we'll end up printing
// this property instead of the value.
tree = new ExpressionContext(methodRef, property.PropertyType, value);
manager.Context.Push(tree);
}
try
{
serializedPropertyValue = SerializeToExpression(manager, propValue);
}
finally
{
if (tree != null)
{
Debug.Assert(manager.Context.Current == tree, "Context stack corrupted.");
manager.Context.Pop();
}
}
}
if (serializedPropertyValue != null)
{
CodeMethodInvokeExpression methodInvoke = new CodeMethodInvokeExpression
{
Method = methodRef
};
methodInvoke.Parameters.Add(extended);
methodInvoke.Parameters.Add(serializedPropertyValue);
statements.Add(methodInvoke);
}
}
}
}
/// <summary>
/// This serializes the given property on this object as a content property.
/// </summary>
private void SerializeContentProperty(IDesignerSerializationManager manager, object value, PropertyDescriptor property, bool isExtender, CodeStatementCollection statements)
{
CodeDomSerializer.Trace("Property is marked as Visibility.Content. Recursing.");
object propertyValue = GetPropertyValue(manager, property, value, out bool validValue);
// For persist contents objects, we don't just serialize the properties on the object; we
// serialize everything.
//
CodeDomSerializer serializer = null;
if (propertyValue == null)
{
CodeDomSerializer.TraceError("Property {0} is marked as Visibility.Content but it is returning null.", property.Name);
string name = manager.GetName(value);
if (name == null)
{
name = value.GetType().FullName;
}
manager.ReportError(new CodeDomSerializerException(string.Format(SR.SerializerNullNestedProperty, name, property.Name), manager));
}
else
{
serializer = (CodeDomSerializer)manager.GetSerializer(propertyValue.GetType(), typeof(CodeDomSerializer));
if (serializer != null)
{
// Create a property reference expression and push it on the context stack.
// This allows the serializer to gain some context as to what it should be
// serializing.
CodeExpression target = SerializeToExpression(manager, value);
if (target == null)
{
CodeDomSerializer.TraceWarning("Unable to convert value to expression object");
}
else
{
CodeExpression propertyRef = null;
if (isExtender)
{
CodeDomSerializer.Trace("Content property is an extender.");
ExtenderProvidedPropertyAttribute exAttr = (ExtenderProvidedPropertyAttribute)property.Attributes[typeof(ExtenderProvidedPropertyAttribute)];
// Extender properties are method invokes on a target "extender" object.
//
CodeExpression extender = SerializeToExpression(manager, exAttr.Provider);
CodeExpression extended = SerializeToExpression(manager, value);
CodeDomSerializer.TraceWarningIf(extender == null, "Extender object {0} could not be serialized.", manager.GetName(exAttr.Provider));
CodeDomSerializer.TraceWarningIf(extended == null, "Extended object {0} could not be serialized.", manager.GetName(value));
if (extender != null && extended != null)
{
CodeMethodReferenceExpression methodRef = new CodeMethodReferenceExpression(extender, "Get" + property.Name);
CodeMethodInvokeExpression methodInvoke = new CodeMethodInvokeExpression
{
Method = methodRef
};
methodInvoke.Parameters.Add(extended);
propertyRef = methodInvoke;
}
}
else
{
propertyRef = new CodePropertyReferenceExpression(target, property.Name);
}
if (propertyRef != null)
{
ExpressionContext tree = new ExpressionContext(propertyRef, property.PropertyType, value, propertyValue);
manager.Context.Push(tree);
object result = null;
try
{
SerializeAbsoluteContext absolute = (SerializeAbsoluteContext)manager.Context[typeof(SerializeAbsoluteContext)];
if (IsSerialized(manager, propertyValue, absolute != null))
{
result = GetExpression(manager, propertyValue);
}
else
{
result = serializer.Serialize(manager, propertyValue);
}
}
finally
{
Debug.Assert(manager.Context.Current == tree, "Serializer added a context it didn't remove.");
manager.Context.Pop();
}
if (result is CodeStatementCollection csc)
{
foreach (CodeStatement statement in csc)
{
statements.Add(statement);
}
}
else
{
if (result is CodeStatement cs)
{
statements.Add(cs);
}
}
}
}
}
else
{
CodeDomSerializer.TraceError("Property {0} is marked as Visibilty.Content but there is no serializer for it.", property.Name);
manager.ReportError(new CodeDomSerializerException(string.Format(SR.SerializerNoSerializerForComponent, property.PropertyType.FullName), manager));
}
}
}