/// <summary>
/// Gets the property that implements the compiled version of the specified binding expression.
/// </summary>
/// <param name="type">The type of the expression for which to retrieve an implementing property.</param>
/// <param name="expression">The text of the expression for which to retrieve an implementing property.</param>
/// <returns>A <see cref="PropertyInfo"/> which represents the property that implements the compiled version of the specified binding expression,
/// or <c>null</c> if the expression has no compiled equivalent.</returns>
public PropertyInfo GetCompiledBindingExpression(Type type, String expression)
{
PropertyInfo property;
var key = new CompiledBindingExpressionKey(type, expression);
if (compiledBindingExpressions.TryGetValue(key, out property))
return property;
return null;
}
/// <summary>
/// Finds all of the compiled binding expressions on the current data
/// source and adds them to the context's registry.
/// </summary>
private void FindCompiledBindingExpressions()
{
var wrapperName = default(String);
var wrapperType = DataSource is PresentationFoundationView ? DataSourceType : null;
if (wrapperType == null)
{
for (var templateType = TemplatedParent.GetType(); templateType != null; templateType = templateType.BaseType)
{
wrapperName = PresentationFoundationView.GetDataSourceWrapperNameForComponentTemplate(templateType);
wrapperType = Ultraviolet.GetUI().GetPresentationFoundation().GetDataSourceWrapperTypeByName(wrapperName);
if (wrapperType != null)
{
break;
}
}
if (wrapperType == null)
{
wrapperName = PresentationFoundationView.GetDataSourceWrapperNameForComponentTemplate(TemplatedParent.GetType());
throw new UvmlException(PresentationStrings.CannotFindViewModelWrapper.Format(wrapperName));
}
}
var properties = wrapperType.GetProperties().Where(x => x.Name.StartsWith("__UPF_Expression")).ToList();
var propertiesWithExpressions = from prop in properties
let attr = (CompiledBindingExpressionAttribute)prop.GetCustomAttributes(typeof(CompiledBindingExpressionAttribute), false).Single()
let expr = attr.Expression
select new
{
Property = prop,
Expression = expr,
};
foreach (var prop in propertiesWithExpressions)
{
var key = new CompiledBindingExpressionKey(prop.Property.PropertyType, prop.Expression);
compiledBindingExpressions.Add(key, prop.Property);
}
var uniques = compiledBindingExpressions.GroupBy(x => x.Key).Where(x => x.Count() == 1).ToList();
foreach (var unique in uniques)
{
var key = new CompiledBindingExpressionKey(null, unique.Key.Expression);
compiledBindingExpressions[key] = unique.Single().Value;
}
}
/// <summary>
/// Gets the property that implements specified compiled binding expression, if it exists in the current context.
/// </summary>
/// <param name="type">The type of the expression for which to retrieve an implementing property.</param>
/// <param name="expression">The text of the expression for which to retrieve an implementing property.</param>
/// <returns>A <see cref="PropertyInfo"/> which represents the property that implements the compiled version of the
/// specified binding expression, or <see langword="null"/> if the expression has no compiled equivalent.</returns>
public PropertyInfo GetCompiledBindingExpression(Type type, String expression)
{
PropertyInfo property;
var specificKey = new CompiledBindingExpressionKey(type, expression);
if (compiledBindingExpressions.TryGetValue(specificKey, out property))
{
return(property);
}
var fallbackKey = new CompiledBindingExpressionKey(null, expression);
if (compiledBindingExpressions.TryGetValue(fallbackKey, out property))
{
return(property);
}
return(null);
}
/// <summary>
/// Finds all of the compiled binding expressions on the current view model and adds them to the context's registry.
/// </summary>
private void FindCompiledBindingExpressions()
{
var wrapperName = default(String);
var wrapperType = DataSource is PresentationFoundationView ? DataSourceType : null;
if (wrapperType == null)
{
for (var templateType = TemplatedParent.GetType(); templateType != null; templateType = templateType.BaseType)
{
wrapperName = PresentationFoundationView.GetDataSourceWrapperNameForComponentTemplate(templateType);
wrapperType = Ultraviolet.GetUI().GetPresentationFoundation().GetDataSourceWrapperTypeByName(wrapperName);
if (wrapperType != null)
break;
}
if (wrapperType == null)
throw new InvalidOperationException(PresentationStrings.CannotFindViewModelWrapper.Format(wrapperName));
}
var properties = wrapperType.GetProperties().Where(x => x.Name.StartsWith("__UPF_Expression")).ToList();
var propertiesWithExpressions = from prop in properties
let attr = (CompiledBindingExpressionAttribute)prop.GetCustomAttributes(typeof(CompiledBindingExpressionAttribute), false).Single()
let expr = attr.Expression
select new
{
Property = prop,
Expression = expr,
};
foreach (var prop in propertiesWithExpressions)
{
var key = new CompiledBindingExpressionKey(prop.Property.PropertyType, prop.Expression);
compiledBindingExpressions.Add(key, prop.Property);
}
}
/// <summary>
/// Gets the property that implements specified compiled binding expression, if it exists in the current context.
/// </summary>
/// <param name="type">The type of the expression for which to retrieve an implementing property.</param>
/// <param name="expression">The text of the expression for which to retrieve an implementing property.</param>
/// <returns>A <see cref="PropertyInfo"/> which represents the property that implements the compiled version of the
/// specified binding expression, or <see langword="null"/> if the expression has no compiled equivalent.</returns>
public PropertyInfo GetCompiledBindingExpression(Type type, String expression)
{
PropertyInfo property;
var specificKey = new CompiledBindingExpressionKey(type, expression);
if (compiledBindingExpressions.TryGetValue(specificKey, out property))
return property;
var fallbackKey = new CompiledBindingExpressionKey(null, expression);
if (compiledBindingExpressions.TryGetValue(fallbackKey, out property))
return property;
return null;
}
