public DependencyPropertyValue(DependencyObject owner, DependencyProperty property)
{
Contract.Require(owner, nameof(owner));
Contract.Require(property, nameof(property));
this.owner = owner;
this.property = property;
this.comparer = BindingExpressions.GetComparisonFunction(typeof(T));
this.metadata = property.GetMetadataForOwner(owner.GetType());
this.flags = DependencyPropertyValueFlags.None;
if (typeof(T).IsClass)
{
flags |= DependencyPropertyValueFlags.IsReferenceType;
}
if (typeof(T).IsValueType)
{
flags |= DependencyPropertyValueFlags.IsValueType;
}
if (metadata.HasDefaultValue)
{
this.defaultValue = (T)(metadata.DefaultValue ?? default(T));
if (IsCoerced)
{
this.coercedValue = metadata.CoerceValue(owner, this.defaultValue);
}
}
UpdateRequiresDigest(GetValue());
}
/// <summary>
/// Initializes a new instance of the <see cref="DataBindingSetterBuilder"/> class.
/// </summary>
/// <param name="expressionType">The type of the bound expression.</param>
/// <param name="dataSourceType">The type of the data source to which the value is being bound.</param>
/// <param name="expression">The binding expression with which to bind the dependency property.</param>
public DataBindingSetterBuilder(Type expressionType, Type dataSourceType, String expression)
: base(dataSourceType)
{
this.boundType = expressionType;
this.delegateType = typeof(DataBindingSetter <>).MakeGenericType(expressionType);
CreateReturnTarget();
var path = BindingExpressions.GetBindingMemberPathPart(expression);
var current = AddDataSourceReference();
var value = AddValueParameter();
if (current.Type.IsValueType)
{
return;
}
if (!AddValueAssignment(current, value, path))
{
return;
}
AddReturn();
AddReturnLabel();
var lambdaBody = Expression.Block(variables, expressions);
var lambda = Expression.Lambda(delegateType, lambdaBody, parameters);
lambdaExpression = lambda;
}
public DependencyBoundValueConverting(IDependencyPropertyValue value, Type expressionType, Type dataSourceType, String expression, Boolean coerceToString)
: base(value, expressionType, dataSourceType, expression)
{
var expressionFormatString = BindingExpressions.GetBindingFormatStringPart(expression);
SetFormatString(expressionFormatString);
this.coerceToString = coerceToString;
this.cachedConvertedValue = GetFresh();
}
/// <summary>
/// Initializes a new instance of the <see cref="DataBindingSetterBuilder"/> class.
/// </summary>
/// <param name="expressionType">The type of the bound expression.</param>
/// <param name="dataSourceType">The type of the data source to which the value is being bound.</param>
/// <param name="expression">The binding expression with which to bind the dependency property.</param>
public DataBindingSetterBuilder(Type expressionType, Type dataSourceType, String expression)
: base(dataSourceType)
{
this.boundType = expressionType;
this.delegateType = typeof(DataBindingSetter <>).MakeGenericType(expressionType);
#if CODE_GEN_ENABLED
CreateReturnTarget();
var path = BindingExpressions.GetBindingMemberPathPart(expression);
var current = AddDataSourceReference();
var value = AddValueParameter();
if (current.Type.IsValueType)
{
return;
}
if (!AddValueAssignment(current, value, path))
{
return;
}
AddReturn();
AddReturnLabel();
var lambdaBody = Expression.Block(variables, expressions);
var lambda = Expression.Lambda(delegateType, lambdaBody, parameters);
lambdaExpression = lambda;
#else
var expParamDataSource = Expression.Parameter(typeof(Object), "dataSource");
var expParamValue = Expression.Parameter(boundType, "value");
var implMethod = typeof(DataBindingSetterBuilder).GetMethod(nameof(ReflectionBasedImplementation),
BindingFlags.NonPublic | BindingFlags.Static);
var path = BindingExpressions.GetBindingMemberPathPart(expression);
var property = dataSourceType.GetProperty(path);
if (!property.CanWrite)
{
return;
}
var expImplMethodCall = Expression.Call(implMethod,
Expression.Constant(property),
Expression.Convert(expParamDataSource, typeof(Object)),
Expression.Convert(expParamValue, typeof(Object)));
lambdaExpression = Expression.Lambda(delegateType, expImplMethodCall, expParamDataSource, expParamValue);
#endif
}
/// <summary>
/// Initializes a new instance of the <see cref="DataBindingGetterBuilder"/> class.
/// </summary>
/// <param name="expressionType">The type of the bound expression.</param>
/// <param name="dataSourceType">The type of the data source to which the expression is being bound.</param>
/// <param name="expression">The binding expression with which to bind the dependency property.</param>
public DataBindingGetterBuilder(Type expressionType, Type dataSourceType, String expression)
: base(dataSourceType)
{
this.delegateType = typeof(DataBindingGetter <>).MakeGenericType(expressionType);
#if CODE_GEN_ENABLED
CreateReturnTarget(expressionType);
var path = BindingExpressions.GetBindingMemberPathPart(expression);
var current = AddDataSourceReference();
current = AddSafeReference(expression, current, path);
var result = Expression.Convert(current, expressionType);
AddReturn(result);
AddReturnLabel();
var lambdaBody = Expression.Block(variables, expressions);
var lambda = Expression.Lambda(delegateType, lambdaBody, parameters);
lambdaExpression = lambda;
#else
var expParamDataSource = Expression.Parameter(typeof(Object), "dataSource");
var implMethod = typeof(DataBindingGetterBuilder).GetMethod(nameof(ReflectionBasedImplementation),
BindingFlags.NonPublic | BindingFlags.Static);
var path = BindingExpressions.GetBindingMemberPathPart(expression);
var property = dataSourceType.GetProperty(path);
if (!property.CanRead)
{
return;
}
var expImplMethodCall = Expression.Call(implMethod,
Expression.Constant(property),
Expression.Convert(expParamDataSource, typeof(Object)));
lambdaExpression = Expression.Lambda(delegateType,
Expression.Convert(
Expression.Convert(expImplMethodCall, property.PropertyType),
expressionType), expParamDataSource);
#endif
}
/// <summary>
/// Initializes a new instance of the <see cref="DependencyBoundValue{TDependency}"/> class.
/// </summary>
/// <param name="value">The dependency property value which created this object.</param>
/// <param name="expressionType">The type of the bound expression.</param>
/// <param name="dataSourceType">The type of the data source.</param>
/// <param name="expression">The binding expression.</param>
public DependencyBoundValue(IDependencyPropertyValue value, Type expressionType, Type dataSourceType, String expression)
{
this.dependencyValue = value;
this.getter = (DataBindingGetter <T>)BindingExpressions.CreateBindingGetter(expressionType, dataSourceType, expression);
this.setter = (DataBindingSetter <T>)BindingExpressions.CreateBindingSetter(expressionType, dataSourceType, expression);
this.comparer = BindingExpressions.GetComparisonFunction(expressionType);
this.cachedValue = GetUnderlyingValue();
this.dpropReference = BindingExpressions.GetSimpleDependencyProperty(dataSourceType, expression);
if (dpropReference != null)
{
var dataSource = value.Owner.DependencyDataSource;
if (dataSource != null)
{
HookDependencyProperty(dataSource);
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="BoundEventBuilder"/> type.
/// </summary>
/// <param name="dataSource">The data source to which the event is being bound.</param>
/// <param name="dataSourceType">The type of the data source to which the expression is being bound.</param>
/// <param name="delegateType">The type of delegate that will be created to bind to the event.</param>
/// <param name="expression">The binding expression that represents the method to bind to the event.</param>
public BoundEventBuilder(Object dataSource, Type dataSourceType, Type delegateType, String expression)
: base(dataSourceType)
{
CreateParameters(delegateType);
CreateReturnTarget();
var path = BindingExpressions.GetBindingMemberPathPart(expression, false);
var current = AddDataSourceReference(expression, dataSource, dataSourceType);
current = AddMethodInvocation(expression, current, path);
AddReturn();
AddReturnLabel();
var lambdaBody = Expression.Block(variables, expressions);
var lambda = Expression.Lambda(delegateType, lambdaBody, parameters);
lambdaExpression = lambda;
}
/// <summary>
/// Initializes a new instance of the <see cref="DataBindingGetterBuilder"/> class.
/// </summary>
/// <param name="expressionType">The type of the bound expression.</param>
/// <param name="dataSourceType">The type of the data source to which the expression is being bound.</param>
/// <param name="expression">The binding expression with which to bind the dependency property.</param>
public DataBindingGetterBuilder(Type expressionType, Type dataSourceType, String expression)
: base(dataSourceType)
{
this.delegateType = typeof(DataBindingGetter <>).MakeGenericType(expressionType);
CreateReturnTarget(expressionType);
var path = BindingExpressions.GetBindingMemberPathPart(expression);
var current = AddDataSourceReference();
current = AddSafeReference(expression, current, path);
var result = Expression.Convert(current, expressionType);
AddReturn(result);
AddReturnLabel();
var lambdaBody = Expression.Block(variables, expressions);
var lambda = Expression.Lambda(delegateType, lambdaBody, parameters);
lambdaExpression = lambda;
}
/// <summary>
/// Creates the dependency property's cached bound value object.
/// </summary>
/// <param name="dataSourceType">The type of the data source to which the dependency property is bound.</param>
/// <param name="expression">The dependency property's binding expression.</param>
private void CreateCachedBoundValue(Type dataSourceType, String expression)
{
var expressionType = BindingExpressions.GetExpressionType(dataSourceType, expression);
if (expressionType != null && TypesRequireSpecialConversion(expressionType, typeof(T)))
{
var coerce = typeof(T) == typeof(Object) && metadata.CoerceObjectToString;
var valueType = typeof(DependencyBoundValueConverting <,>).MakeGenericType(typeof(T), expressionType);
var valueCtor = default(Delegate);
lock (cachedBoundValueCtors)
cachedBoundValueCtors.TryGetValue(valueType, out valueCtor);
if (valueCtor == null)
{
valueCtor = CreateDependencyPropertyBoundValueConvertingCtor(valueType);
}
var valueInstance = ((DependencyBoundValueConvertingCtor <T>)valueCtor)(this, expressionType, dataSourceType, expression, coerce);
cachedBoundValue = valueInstance;
}
else
{
var valueType = typeof(DependencyBoundValueNonConverting <>).MakeGenericType(typeof(T));
var valueCtor = default(Delegate);
lock (cachedBoundValueCtors)
cachedBoundValueCtors.TryGetValue(valueType, out valueCtor);
if (valueCtor == null)
{
valueCtor = CreateDependencyPropertyBoundValueNonConvertingCtor(valueType);
}
var valueInstance = ((DependencyBoundValueNonConvertingCtor <T>)valueCtor)(this, typeof(T), dataSourceType, expression);
cachedBoundValue = valueInstance;
}
}
/// <summary>
/// Determines whether the specified target is a dependency property, routed event, or standard property/event.
/// </summary>
private static UvmlMutatorTarget GetMutatorTarget(UltravioletContext uv,
String name, String value, Type type, out Object target, out Type targetType)
{
var upf = uv.GetUI().GetPresentationFoundation();
// If this is an attached property/event, find the owner type.
var depname = new DependencyName(name);
if (depname.IsAttached)
{
var attachedOwnerType = default(Type);
if (!upf.GetKnownType(depname.Owner, out attachedOwnerType))
{
throw new UvmlException(PresentationStrings.UnrecognizedType.Format(depname.Owner));
}
type = attachedOwnerType;
}
// Is it a dependency property?
var dprop = DependencyProperty.FindByName(depname.Name, type);
if (dprop != null)
{
target = dprop;
if (value != null && BindingExpressions.IsBindingExpression(value))
{
targetType = typeof(String);
return(UvmlMutatorTarget.DependencyPropertyBinding);
}
targetType = dprop.PropertyType;
return(UvmlMutatorTarget.DependencyProperty);
}
// Is it a routed event?
var revt = EventManager.FindByName(depname.Name, type);
if (revt != null)
{
target = revt;
targetType = typeof(String);
return(UvmlMutatorTarget.RoutedEvent);
}
// Is it a standard property?
var clrprop = type.GetProperty(depname.Name, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
if (clrprop != null)
{
target = clrprop;
targetType = clrprop.PropertyType;
return(UvmlMutatorTarget.StandardProperty);
}
// Is it a standard event?
var clrevt = type.GetEvent(depname.Name, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
if (clrevt != null)
{
target = clrevt;
targetType = typeof(String);
return(UvmlMutatorTarget.StandardEvent);
}
throw new UvmlException(PresentationStrings.EventOrPropertyDoesNotExist.Format(depname.Name, type.Name));
}
