/// <summary>
/// Called for every syntax node in the compilation, we can inspect the nodes and save any information useful for generation
/// </summary>
public void OnVisitSyntaxNode(GeneratorSyntaxContext context)
{
if (context.Node is ClassDeclarationSyntax classDeclaration)
{
INamedTypeSymbol classTypeSymbol = context.SemanticModel.GetDeclaredSymbol(classDeclaration) as INamedTypeSymbol;
if (classTypeSymbol.GetAttributes().Any(ad => ad.AttributeClass.ToDisplayString() == "System.Mvvm.MVVMViewModelAttribute"))
{
ClassTypeSymbol = classTypeSymbol;
var props = classDeclaration.Members.OfType <PropertyDeclarationSyntax>();
ImmutableArray <ISymbol> members = ClassTypeSymbol.GetMembers();
foreach (ISymbol member in members)
{
if (member is IFieldSymbol fieldSymbol)
{
if (fieldSymbol.Type.ToDisplayString() == "System.Mvvm.DelegateCommand")
{
CommandFields.Add(fieldSymbol);
}
}
}
//check to see if any properties are exposed
if (props.Any())
{
var commandFieldnames = new List <string>();
var fieldsToRemove = new List <IFieldSymbol>();
//work through each property
foreach (PropertyDeclarationSyntax propertySyntax in props)
{
IPropertySymbol propertySymbol = context.SemanticModel.GetDeclaredSymbol(propertySyntax);
if (propertySymbol.Type.ToDisplayString() == "System.Windows.Input.ICommand" || (propertySymbol.Type.ToDisplayString() == "System.Mvvm.DelegateCommand"))
{
var propCode = propertySyntax.ToString();
if (CommandFields.Any())
{
foreach (var command in CommandFields)
{
if (propCode.Contains(command.Name))
{
//don't notify the field as its cheaper to call the OnPropertyChanged notification
fieldsToRemove.Add(command);
}
}
}
Properties.Add(propertySymbol);
}
}
//remove removed fields :-)
foreach (var field in fieldsToRemove)
{
CommandFields.Remove(field);
}
}
}
}
}
