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/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Markup / BamlCollectionHolder.cs / 1 / BamlCollectionHolder.cs
/****************************************************************************\ * * File: BamlCollectionHolder.cs * * Copyright (C) 2003 by Microsoft Corporation. All rights reserved. * \***************************************************************************/ using System; using System.Collections; using System.Reflection; namespace System.Windows.Markup { // Helper class that holds a collection for a property. This class // replaces the old BamlDictionaryHolder and BamlArrayHolder classes internal class BamlCollectionHolder { internal BamlCollectionHolder() { } internal BamlCollectionHolder(BamlRecordReader reader, object parent, short attributeId) : this(reader, parent, attributeId, true) { } internal BamlCollectionHolder(BamlRecordReader reader, object parent, short attributeId, bool needDefault) { _reader = reader; _parent = parent; _propDef = new PropertyDefinition(reader, attributeId, parent is DependencyObject); _attributeId = attributeId; if (needDefault) { InitDefaultValue(); } CheckReadOnly(); } // the collection stored for a given property internal object Collection { get { return _collection; } set { _collection = value; } } // helper that casts the collection as an IList internal IList List { get { return _collection as IList; } } // helper that casts the collection as an IDictionary internal IDictionary Dictionary { get { return _collection as IDictionary; } } // helper that casts the collection as an ArrayExtension internal ArrayExtension ArrayExt { get { return _collection as ArrayExtension; } } // the default collection to be used in case the property does not have an explicit tag internal object DefaultCollection { get { return _defaultCollection; } } // the PropertyDefinition associated with the BamlCollectionHolder's property internal PropertyDefinition PropertyDefinition { get { return _propDef; } } // the return type of the BamlCollectionHolder's property's getter internal Type PropertyType { get { return _resourcesParent != null ? typeof(ResourceDictionary) : PropertyDefinition.PropertyType; } } // the parent object of this collection holder internal object Parent { get { return _parent; } } // returns true if the property cannot be set internal bool ReadOnly { get { return _readonly; } set { _readonly = value; } } // returns true if the property has an explicit tag, so items should not be added to it directly internal bool IsClosed { get { return _isClosed; } set { _isClosed = value; } } internal string AttributeName { get { return _reader.GetPropertyNameFromAttributeId(_attributeId); } } // set the property associated with the collection holder to the value of the holder's collection internal void SetPropertyValue() { // Do if the property value has not been set before this if (!_isPropertyValueSet) { _isPropertyValueSet = true; // the order of precedence is the fast-tracked Resources property, then DP, then the attached property // setter, then the property info if (_resourcesParent != null) { _resourcesParent.Resources = (ResourceDictionary)Collection; } else if (PropertyDefinition.DependencyProperty != null) { DependencyObject dpParent = Parent as DependencyObject; if (dpParent == null) { _reader.ThrowException(SRID.ParserParentDO, Parent.ToString()); } _reader.SetDependencyValue(dpParent, PropertyDefinition.DependencyProperty, Collection); } else if (PropertyDefinition.AttachedPropertySetter != null) { PropertyDefinition.AttachedPropertySetter.Invoke(null, new object[] { Parent, Collection }); } else if (PropertyDefinition.PropertyInfo != null) { PropertyDefinition.PropertyInfo.SetValue(Parent, Collection, BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy, null, null, XamlReaderHelper.EnglishUSCulture); } else { _reader.ThrowException(SRID.ParserCantGetDPOrPi, AttributeName); } } } // Initialize the collection holder, by setting its property definition and default value (retrieved // from the property definition). internal void InitDefaultValue() { if (AttributeName == "Resources" && Parent is IHaveResources) { // "Fast Path" handling of Resources non-DP property _resourcesParent = ((IHaveResources)Parent); _defaultCollection = _resourcesParent.Resources; } // the order of precedence according to the spec is DP, then attached property, then PropertyInfo else if (PropertyDefinition.DependencyProperty != null) { _defaultCollection = ((DependencyObject)Parent).GetValue(PropertyDefinition.DependencyProperty); } else if (PropertyDefinition.AttachedPropertyGetter != null) { _defaultCollection = PropertyDefinition.AttachedPropertyGetter.Invoke(null, new object[] { Parent }); } else if (PropertyDefinition.PropertyInfo != null) { if (PropertyDefinition.IsInternal) { _defaultCollection = XamlTypeMapper.GetInternalPropertyValue(_reader.ParserContext, _reader.ParserContext.RootElement, PropertyDefinition.PropertyInfo, Parent); if (_defaultCollection == null) { _reader.ThrowException(SRID.ParserCantGetProperty, PropertyDefinition.Name); } } else { _defaultCollection = PropertyDefinition.PropertyInfo.GetValue( Parent, BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy, null, null, XamlReaderHelper.EnglishUSCulture); } } else { _reader.ThrowException(SRID.ParserCantGetDPOrPi, AttributeName); } } private void CheckReadOnly() { if (_resourcesParent == null && (PropertyDefinition.DependencyProperty == null || PropertyDefinition.DependencyProperty.ReadOnly) && (PropertyDefinition.PropertyInfo == null || !PropertyDefinition.PropertyInfo.CanWrite) && PropertyDefinition.AttachedPropertySetter == null) { if (DefaultCollection == null) { // if the property is read-only and has a null default value, throw an exception _reader.ThrowException(SRID.ParserReadOnlyNullProperty, PropertyDefinition.Name); } // the property is read-only, so we have to use its default value as the dictionary ReadOnly = true; Collection = DefaultCollection; } } private object _collection; private object _defaultCollection; private short _attributeId; private PropertyDefinition _propDef; private object _parent; private BamlRecordReader _reader; private IHaveResources _resourcesParent; // for fast-tracking Resources properties private bool _readonly; private bool _isClosed; private bool _isPropertyValueSet; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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