/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var eventHandlerName = ProcessPrecomputedValue<String>(value, context);
if (eventHandlerName == null)
throw new UvmlException(PresentationStrings.InvalidEventHandler.Format(eventInfo.Name, "(null)"));
var eventHandlerDelegate = CreateEventHandlerDelegate(eventHandlerName, eventInfo.EventHandlerType, context);
eventInfo.AddEventHandler(instance, eventHandlerDelegate);
}
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var dobj = instance as DependencyObject;
if (dobj == null)
return;
var processedValue = ProcessPrecomputedValue<Object>(value, context);
dpropSetter.Invoke(instance, new Object[] { dpropID, processedValue });
}
/// <inheritdoc/>
public override Object Instantiate(UltravioletContext uv, UvmlInstantiationContext context)
{
if (String.Equals(Literal, "{{null}}", StringComparison.Ordinal))
return Type.IsValueType ? Activator.CreateInstance(Type) : null;
if (typeof(UIElement).IsAssignableFrom(Type))
{
return new UvmlElementReference(Literal);
}
return ObjectResolver.FromString(Literal, Type, Culture);
}
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var uiElement = instance as UIElement;
if (uiElement == null)
return;
var eventHandlerName = ProcessPrecomputedValue<String>(value, context);
if (eventHandlerName == null)
throw new UvmlException(PresentationStrings.InvalidEventHandler.Format(revtID.Name, "(null)"));
var eventHandlerDelegate = CreateEventHandlerDelegate(eventHandlerName, revtID.DelegateType, context);
uiElement.AddHandler(revtID, eventHandlerDelegate);
}
/// <inheritdoc/>
public override Object Instantiate(UltravioletContext uv, UvmlInstantiationContext context)
{
if (String.Equals(Literal, "{{null}}", StringComparison.Ordinal))
{
return(Type.IsValueType ? Activator.CreateInstance(Type) : null);
}
if (typeof(IInputElement).IsAssignableFrom(Type))
{
return(new UvmlElementReference(Literal));
}
return(ObjectResolver.FromString(Literal, Type, Culture));
}
/// <summary>
/// Creates a new collection instance of the specified type.
/// </summary>
/// <param name="uv">The Ultraviolet context.</param>
/// <param name="instance">The object instance which is being mutated.</param>
/// <param name="context">The current instantiation context.</param>
/// <param name="type">The type of collection to create.</param>
/// <param name="collection">The collection which was created.</param>
/// <returns><see langword="true"/> if the collection was able to be created;
/// otherwise, <see langword="false"/>.</returns>
protected Boolean CreateCollectionOfType(UltravioletContext uv,
Object instance, UvmlInstantiationContext context, Type type, out Object collection)
{
var ctor = type.GetConstructor(Type.EmptyTypes);
if (ctor == null)
{
collection = null;
return(false);
}
collection = ctor.Invoke(null);
return(true);
}
/// <summary>
/// Creates a handler delegate for an event.
/// </summary>
/// <param name="name">The name of the method which will handle the event.</param>
/// <param name="type">The type of delegate which handles the event.</param>
/// <param name="context">The current instantiation context.</param>
/// <returns>The delegate which was created to handle the event.</returns>
protected static Delegate CreateEventHandlerDelegate(String name, Type type, UvmlInstantiationContext context)
{
var dataSource = context.DataSource;
var dataSourceType = context.DataSourceType;
var templatedParent = context.TemplatedParent as UIElement;
if (templatedParent != null)
{
dataSource = templatedParent;
PresentationFoundation.Instance.ComponentTemplates.Get(templatedParent, out dataSourceType);
}
return BindingExpressions.CreateBoundEventDelegate(dataSource, dataSourceType, type, name);
}
/// <summary>
/// Creates a handler delegate for an event.
/// </summary>
/// <param name="name">The name of the method which will handle the event.</param>
/// <param name="type">The type of delegate which handles the event.</param>
/// <param name="context">The current instantiation context.</param>
/// <returns>The delegate which was created to handle the event.</returns>
protected static Delegate CreateEventHandlerDelegate(String name, Type type, UvmlInstantiationContext context)
{
var dataSource = context.DataSource;
var dataSourceType = context.DataSourceType;
var templatedParent = context.TemplatedParent as UIElement;
if (templatedParent != null)
{
dataSource = templatedParent;
PresentationFoundation.Instance.ComponentTemplates.Get(templatedParent, out dataSourceType);
}
return(BindingExpressions.CreateBoundEventDelegate(dataSource, dataSourceType, type, name));
}
/// <summary>
/// Loads the content of the template as an instance of an object and returns the root element of the content.
/// </summary>
/// <param name="dataSource">The object's data source.</param>
/// <param name="dataSourceType">The object's data source type.</param>
/// <returns>The root element of the content.</returns>
public DependencyObject LoadContent(Object dataSource, Type dataSourceType)
{
var uv = UltravioletContext.DemandCurrent();
var namescope = default(Namescope);
var wrapper = CreateDataSourceWrapper(dataSource, dataSourceType, out namescope);
var context = new UvmlInstantiationContext(uv, null, wrapper, wrapper?.GetType(), namescope);
var dobj = (DependencyObject)((UvmlTemplateInstance)template.Instantiate(uv, context)).Finalize();
var element = dobj as FrameworkElement;
if (element != null)
element.TemplatedNamescope = namescope;
if (dataSource != null)
namescope.PopulateFieldsFromRegisteredElements(dataSource);
return dobj;
}
/// <summary>
/// Performs initialization required by instances of the <see cref="UIElement"/> class.
/// </summary>
private void InitializeElement(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
var uiElement = instance as UIElement;
if (uiElement == null)
{
return;
}
if (uiElement != null && classes != null)
{
foreach (var className in classes)
{
uiElement.Classes.Add(className);
}
}
}
/// <inheritdoc/>
public override Object Instantiate(UltravioletContext uv, UvmlInstantiationContext context)
{
var instance = instantiator(uv, name);
if (instance == null)
{
throw new NullReferenceException(nameof(instance));
}
InitializeFrameworkElement(uv, instance, context);
InitializeElement(uv, instance, context);
InitializeDependencyObject(uv, instance, context);
var mutatorsWithValues =
(from mutator in mutators
select new
{
Mutator = mutator,
Value = mutator.InstantiateValue(uv, instance, context)
}).ToArray();
return(new UvmlTemplateInstance(instance, () =>
{
foreach (var mutator in mutatorsWithValues)
{
mutator.Mutator.Mutate(uv, instance, mutator.Value, context);
}
InitializeContentPresenter(uv, instance, context);
if (IsItemsPanelForTemplatedParent)
{
var itemsControl = context.TemplatedParent as ItemsControl;
if (itemsControl != null)
{
itemsControl.ItemsPanelElement = instance as Panel;
}
}
var fe = instance as FrameworkElement;
if (fe != null)
{
fe.EndInit();
}
}));
}
/// <summary>
/// Processes the specified value for use by a mutator.
/// </summary>
/// <typeparam name="T">The type of value which is expected.</typeparam>
/// <param name="value">The value to process.</param>
/// <param name="context">The current instantiation context.</param>
/// <returns>The value after it has been converted to the expected type.</returns>
protected static T ProcessPrecomputedValue <T>(Object value, UvmlInstantiationContext context)
{
var templateInstance = value as UvmlTemplateInstance;
if (templateInstance != null)
{
return((T)templateInstance.Finalize());
}
var elementReference = value as UvmlElementReference;
if (elementReference != null)
{
return((T)elementReference.GetReferencedElement(context.Namescope));
}
return((T)value);
}
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var dobj = instance as DependencyObject;
if (dobj == null)
return;
var expression = ProcessPrecomputedValue<String>(value, context);
if (expression == null)
throw new UvmlException(PresentationStrings.InvalidBindingExpression.Format("(null)"));
var compiled = context.GetCompiledBindingExpression(dpropID.PropertyType, expression);
if (compiled == null)
throw new UvmlException(PresentationStrings.CompiledExpressionNotFound.Format(expression));
var fmtString = BindingExpressions.GetBindingFormatStringPart(expression);
if (fmtString != null)
{
dobj.BindValue(dpropID, context.DataSourceType, "{{" + compiled.Name + "}}[" + fmtString + "]");
}
else
{
dobj.BindValue(dpropID, context.DataSourceType, "{{" + compiled.Name + "}}");
}
}
/// <inheritdoc/>
public override Object InstantiateValue(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
return eventHandler.Instantiate(uv, context);
}
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var dobj = instance as DependencyObject;
if (dobj == null)
{
return;
}
var expression = ProcessPrecomputedValue <String>(value, context);
if (expression == null)
{
throw new UvmlException(PresentationStrings.InvalidBindingExpression.Format("(null)"));
}
var compiled = context.GetCompiledBindingExpression(dpropID.PropertyType, expression);
if (compiled == null)
{
throw new UvmlException(PresentationStrings.CompiledExpressionNotFound.Format(expression));
}
var fmtString = BindingExpressions.GetBindingFormatStringPart(expression);
if (fmtString != null)
{
dobj.BindValue(dpropID, context.DataSourceType, "{{" + compiled.Name + "}}[" + fmtString + "]");
}
else
{
dobj.BindValue(dpropID, context.DataSourceType, "{{" + compiled.Name + "}}");
}
}
/// <inheritdoc/>
protected override Boolean CreateCollection(UltravioletContext uv, Object instance, UvmlInstantiationContext context, out Object collection)
{
return(CreateCollectionOfType(uv, instance, context, dpropID.PropertyType, out collection));
}
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var processedValue = ProcessPrecomputedValue <Object>(value, context);
propertyInfo.SetValue(instance, processedValue, null);
}
/// <inheritdoc/>
public override Object InstantiateValue(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
return propertyValue.Instantiate(uv, context);
}
/// <summary>
/// Performs initialization required by instances of the <see cref="ContentPresenter"/> class.
/// </summary>
private void InitializeContentPresenter(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
var contentPresenter = instance as ContentPresenter;
if (contentPresenter == null)
{
return;
}
if (contentPresenter.HasDefinedValue(ContentPresenter.ContentProperty) || contentPresenter.TemplatedParent == null)
{
return;
}
var alias = contentPresenter.ContentSource ?? "Content";
if (alias == String.Empty)
{
return;
}
var templateType = contentPresenter.TemplatedParent.GetType();
var templateWrapperName = PresentationFoundationView.GetDataSourceWrapperNameForComponentTemplate(templateType);
var templateWrapperType = uv.GetUI().GetPresentationFoundation().GetDataSourceWrapperTypeByName(templateWrapperName);
var dpAliasedContent = DependencyProperty.FindByName(alias, templateType);
if (dpAliasedContent != null)
{
contentPresenter.BindValue(ContentPresenter.ContentProperty, templateWrapperType,
"{{" + dpAliasedContent.Name + "}}");
}
if (!contentPresenter.HasDefinedValue(ContentPresenter.ContentStringFormatProperty))
{
var dpAliasedContentStringFormat = DependencyProperty.FindByName(alias + "StringFormat", templateType);
if (dpAliasedContentStringFormat != null)
{
contentPresenter.BindValue(ContentPresenter.ContentStringFormatProperty, templateWrapperType,
"{{" + dpAliasedContentStringFormat.Name + "}}");
}
}
}
/// <summary>
/// Performs initialization required by instances of the <see cref="UIElement"/> class.
/// </summary>
private void InitializeElement(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
var uiElement = instance as UIElement;
if (uiElement == null)
return;
if (uiElement != null && classes != null)
{
foreach (var className in classes)
uiElement.Classes.Add(className);
}
}
/// <summary> /// Instantiates the value represented by the node. /// </summary> /// <param name="uv">The Ultraviolet context.</param> /// <param name="context">The instantiation context for this node.</param> /// <returns>The object which was instantiated by the node.</returns> public abstract Object Instantiate(UltravioletContext uv, UvmlInstantiationContext context);
/// <inheritdoc/>
public override Object Instantiate(UltravioletContext uv, UvmlInstantiationContext context)
{
var instance = instantiator(uv, name);
if (instance == null)
throw new NullReferenceException(nameof(instance));
InitializeFrameworkElement(uv, instance, context);
InitializeElement(uv, instance, context);
InitializeDependencyObject(uv, instance, context);
var mutatorsWithValues =
(from mutator in mutators
select new
{
Mutator = mutator,
Value = mutator.InstantiateValue(uv, instance, context)
}).ToArray();
return new UvmlTemplateInstance(instance, () =>
{
foreach (var mutator in mutatorsWithValues)
mutator.Mutator.Mutate(uv, instance, mutator.Value, context);
InitializeContentPresenter(uv, instance, context);
if (IsItemsPanelForTemplatedParent)
{
var itemsControl = context.TemplatedParent as ItemsControl;
if (itemsControl != null)
itemsControl.ItemsPanelElement = instance as Panel;
}
var fe = instance as FrameworkElement;
if (fe != null)
fe.EndInit();
});
}
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var items = ProcessPrecomputedValue<List<Object>>(value, context);
if (items == null)
throw new ArgumentException(nameof(value));
var propname = default(String);
var collection = default(Object);
if (!GetCollection(instance, out collection, out propname))
throw new UvmlException(PresentationStrings.PropertyHasNoGetter.Format(propname));
if (collection == null)
{
if (!CreateCollection(uv, instance, context, out collection))
throw new UvmlException(PresentationStrings.CollectionCannotBeCreated.Format(propname));
if (!SetCollection(instance, collection))
throw new UvmlException(PresentationStrings.PropertyHasNoSetter.Format(propname));
}
var listType = collection.GetType();
var listItemType = GetCollectionItemType(listType);
if (listItemType == null)
throw new UvmlException(PresentationStrings.CollectionTypeNotSupported.Format(listType));
var listClearMethod = listType.GetMethod("Clear",
BindingFlags.Public | BindingFlags.Instance, null, Type.EmptyTypes, null);
if (listClearMethod == null)
throw new UvmlException(PresentationStrings.CollectionCannotBeCleared.Format(listType.Name));
listClearMethod.Invoke(collection, null);
var listAddRangeMethod = listType.GetMethod("AddRange",
BindingFlags.Public | BindingFlags.Instance, null, new[] { typeof(IEnumerable<>).MakeGenericType(listItemType) }, null);
if (listAddRangeMethod != null)
{
var itemInstances = Array.CreateInstance(listItemType, items.Count);
for (int i = 0; i < items.Count; i++)
{
var item = ProcessPrecomputedValue<Object>(items[i], context);
itemInstances.SetValue(item, i);
}
listAddRangeMethod.Invoke(collection, new[] { itemInstances });
}
else
{
var listAddMethodParameters = new Object[] { null };
var listAddMethod = listType.GetMethod("Add",
BindingFlags.Public | BindingFlags.Instance, null, new[] { listItemType }, null);
if (listAddMethod != null)
{
foreach (var item in items)
{
listAddMethodParameters[0] = ProcessPrecomputedValue<Object>(item, context);
listAddMethod.Invoke(collection, listAddMethodParameters);
}
}
else
{
throw new UvmlException(PresentationStrings.CollectionHasNoAddMethod.Format(listType.Name));
}
}
}
/// <inheritdoc/>
public override Object InstantiateValue(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
return items.Select(x => x.Instantiate(uv, context)).ToList();
}
/// <summary>
/// Creates a new collection instance of the specified type.
/// </summary>
/// <param name="uv">The Ultraviolet context.</param>
/// <param name="instance">The object instance which is being mutated.</param>
/// <param name="context">The current instantiation context.</param>
/// <param name="type">The type of collection to create.</param>
/// <param name="collection">The collection which was created.</param>
/// <returns><see langword="true"/> if the collection was able to be created;
/// otherwise, <see langword="false"/>.</returns>
protected Boolean CreateCollectionOfType(UltravioletContext uv,
Object instance, UvmlInstantiationContext context, Type type, out Object collection)
{
var ctor = type.GetConstructor(Type.EmptyTypes);
if (ctor == null)
{
collection = null;
return false;
}
collection = ctor.Invoke(null);
return true;
}
/// <summary>
/// Creates a new collection instance for the mutated property.
/// </summary>
/// <param name="uv">The Ultraviolet context.</param>
/// <param name="instance">The object instance which is being mutated.</param>
/// <param name="context">The current instantiation context.</param>
/// <param name="collection">The collection which was created.</param>
/// <returns><see langword="true"/> if the collection was able to be created;
/// otherwise, <see langword="false"/>.</returns>
protected abstract Boolean CreateCollection(UltravioletContext uv,
Object instance, UvmlInstantiationContext context, out Object collection);
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var dobj = instance as DependencyObject;
if (dobj == null)
{
return;
}
var processedValue = ProcessPrecomputedValue <Object>(value, context);
dpropSetter.Invoke(instance, new Object[] { dpropID, processedValue });
}
/// <inheritdoc/>
protected override Boolean CreateCollection(UltravioletContext uv, Object instance, UvmlInstantiationContext context, out Object collection)
{
collection = null;
return false;
}
/// <summary> /// Instantiates the value associated with this mutation. /// </summary> /// <param name="uv">The Ultraviolet context.</param> /// <param name="instance">The object instance to mutate.</param> /// <param name="context">The current instantiation context.</param> /// <returns>The value which was instantiated.</returns> public abstract Object InstantiateValue(UltravioletContext uv, Object instance, UvmlInstantiationContext context);
/// <summary>
/// Performs initialization required by instances of the <see cref="DependencyObject"/> class.
/// </summary>
private void InitializeDependencyObject(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
var dobj = instance as DependencyObject;
if (dobj == null)
{
return;
}
dobj.DeclarativeDataSource = context.DataSource;
}
/// <summary> /// Applies the mutation to the specified object instance using the specified precomputed value. /// </summary> /// <param name="uv">The Ultraviolet context.</param> /// <param name="instance">The object instance to mutate.</param> /// <param name="value">The precomputed value to apply with the mutation.</param> /// <param name="context">The current instantiation context.</param> public abstract void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context);
/// <summary>
/// Performs initialization required by instances of the <see cref="DependencyObject"/> class.
/// </summary>
private void InitializeDependencyObject(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
var dobj = instance as DependencyObject;
if (dobj == null)
return;
dobj.DeclarativeDataSource = context.DataSource;
}
/// <summary>
/// Performs initialization required by instances of the <see cref="FrameworkElement"/> class.
/// </summary>
private void InitializeFrameworkElement(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
var frameworkElement = instance as FrameworkElement;
if (frameworkElement == null)
return;
context.Namescope.RegisterElement(frameworkElement);
frameworkElement.BeginInit();
frameworkElement.TemplatedParent = context.TemplatedParent as DependencyObject;
}
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var processedValue = ProcessPrecomputedValue<Object>(value, context);
propertyInfo.SetValue(instance, processedValue, null);
}
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
var value = InstantiateValue(uv, instance, context);
Mutate(uv, instance, value, context);
}
/// <summary>
/// Performs initialization required by instances of the <see cref="ContentPresenter"/> class.
/// </summary>
private void InitializeContentPresenter(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
var contentPresenter = instance as ContentPresenter;
if (contentPresenter == null)
return;
if (contentPresenter.HasDefinedValue(ContentPresenter.ContentProperty) || contentPresenter.TemplatedParent == null)
return;
var alias = contentPresenter.ContentSource ?? "Content";
if (alias == String.Empty)
return;
var templateType = contentPresenter.TemplatedParent.GetType();
var templateWrapperName = PresentationFoundationView.GetDataSourceWrapperNameForComponentTemplate(templateType);
var templateWrapperType = uv.GetUI().GetPresentationFoundation().GetDataSourceWrapperTypeByName(templateWrapperName);
var dpAliasedContent = DependencyProperty.FindByName(alias, templateType);
if (dpAliasedContent != null)
{
contentPresenter.BindValue(ContentPresenter.ContentProperty, templateWrapperType,
"{{" + dpAliasedContent.Name + "}}");
}
if (!contentPresenter.HasDefinedValue(ContentPresenter.ContentStringFormatProperty))
{
var dpAliasedContentStringFormat = DependencyProperty.FindByName(alias + "StringFormat", templateType);
if (dpAliasedContentStringFormat != null)
{
contentPresenter.BindValue(ContentPresenter.ContentStringFormatProperty, templateWrapperType,
"{{" + dpAliasedContentStringFormat.Name + "}}");
}
}
}
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var eventHandlerName = ProcessPrecomputedValue <String>(value, context);
if (eventHandlerName == null)
{
throw new UvmlException(PresentationStrings.InvalidEventHandler.Format(eventInfo.Name, "(null)"));
}
var eventHandlerDelegate = CreateEventHandlerDelegate(eventHandlerName, eventInfo.EventHandlerType, context);
eventInfo.AddEventHandler(instance, eventHandlerDelegate);
}
/// <inheritdoc/>
public override Object InstantiateValue(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
return(dpropValue.Instantiate(uv, context));
}
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var uiElement = instance as UIElement;
if (uiElement == null)
{
return;
}
var eventHandlerName = ProcessPrecomputedValue <String>(value, context);
if (eventHandlerName == null)
{
throw new UvmlException(PresentationStrings.InvalidEventHandler.Format(revtID.Name, "(null)"));
}
var eventHandlerDelegate = CreateEventHandlerDelegate(eventHandlerName, revtID.DelegateType, context);
uiElement.AddHandler(revtID, eventHandlerDelegate);
}
/// <inheritdoc/>
protected override Boolean CreateCollection(UltravioletContext uv, Object instance, UvmlInstantiationContext context, out Object collection)
{
return CreateCollectionOfType(uv, instance, context, dpropID.PropertyType, out collection);
}
/// <summary> /// Instantiates the value represented by the node. /// </summary> /// <param name="uv">The Ultraviolet context.</param> /// <param name="context">The instantiation context for this node.</param> /// <returns>The object which was instantiated by the node.</returns> public abstract Object Instantiate(UltravioletContext uv, UvmlInstantiationContext context);
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
var value = InstantiateValue(uv, instance, context);
Mutate(uv, instance, value, context);
}
/// <summary>
/// Performs initialization required by instances of the <see cref="FrameworkElement"/> class.
/// </summary>
private void InitializeFrameworkElement(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
var frameworkElement = instance as FrameworkElement;
if (frameworkElement == null)
{
return;
}
context.Namescope.RegisterElement(frameworkElement);
frameworkElement.BeginInit();
frameworkElement.TemplatedParent = context.TemplatedParent as DependencyObject;
}
/// <summary>
/// Creates a new collection instance for the mutated property.
/// </summary>
/// <param name="uv">The Ultraviolet context.</param>
/// <param name="instance">The object instance which is being mutated.</param>
/// <param name="context">The current instantiation context.</param>
/// <param name="collection">The collection which was created.</param>
/// <returns><see langword="true"/> if the collection was able to be created;
/// otherwise, <see langword="false"/>.</returns>
protected abstract Boolean CreateCollection(UltravioletContext uv,
Object instance, UvmlInstantiationContext context, out Object collection);
/// <inheritdoc/>
protected override Boolean CreateCollection(UltravioletContext uv, Object instance, UvmlInstantiationContext context, out Object collection)
{
collection = null;
return(false);
}
/// <inheritdoc/>
public override Object InstantiateValue(UltravioletContext uv, Object instance, UvmlInstantiationContext context)
{
return(items.Select(x => x.Instantiate(uv, context)).ToList());
}
/// <inheritdoc/>
public override Object Instantiate(UltravioletContext uv, UvmlInstantiationContext context)
{
return(Template);
}
/// <inheritdoc/>
public override void Mutate(UltravioletContext uv, Object instance, Object value, UvmlInstantiationContext context)
{
var items = ProcessPrecomputedValue <List <Object> >(value, context);
if (items == null)
{
throw new ArgumentException(nameof(value));
}
var propname = default(String);
var collection = default(Object);
if (!GetCollection(instance, out collection, out propname))
{
throw new UvmlException(PresentationStrings.PropertyHasNoGetter.Format(propname));
}
if (collection == null)
{
if (!CreateCollection(uv, instance, context, out collection))
{
throw new UvmlException(PresentationStrings.CollectionCannotBeCreated.Format(propname));
}
if (!SetCollection(instance, collection))
{
throw new UvmlException(PresentationStrings.PropertyHasNoSetter.Format(propname));
}
}
var listType = collection.GetType();
var listItemType = GetCollectionItemType(listType);
if (listItemType == null)
{
throw new UvmlException(PresentationStrings.CollectionTypeNotSupported.Format(listType));
}
var listClearMethod = listType.GetMethod("Clear",
BindingFlags.Public | BindingFlags.Instance, null, Type.EmptyTypes, null);
if (listClearMethod == null)
{
throw new UvmlException(PresentationStrings.CollectionCannotBeCleared.Format(listType.Name));
}
listClearMethod.Invoke(collection, null);
var listAddRangeMethod = listType.GetMethod("AddRange",
BindingFlags.Public | BindingFlags.Instance, null, new[] { typeof(IEnumerable <>).MakeGenericType(listItemType) }, null);
if (listAddRangeMethod != null)
{
var itemInstances = Array.CreateInstance(listItemType, items.Count);
for (int i = 0; i < items.Count; i++)
{
var item = ProcessPrecomputedValue <Object>(items[i], context);
itemInstances.SetValue(item, i);
}
listAddRangeMethod.Invoke(collection, new[] { itemInstances });
}
else
{
var listAddMethodParameters = new Object[] { null };
var listAddMethod = listType.GetMethod("Add",
BindingFlags.Public | BindingFlags.Instance, null, new[] { listItemType }, null);
if (listAddMethod != null)
{
foreach (var item in items)
{
listAddMethodParameters[0] = ProcessPrecomputedValue <Object>(item, context);
listAddMethod.Invoke(collection, listAddMethodParameters);
}
}
else
{
throw new UvmlException(PresentationStrings.CollectionHasNoAddMethod.Format(listType.Name));
}
}
}
/// <inheritdoc/>
public override Object Instantiate(UltravioletContext uv, UvmlInstantiationContext context)
{
return Template;
}