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using System;
using System.Collections.Generic;
using System.Xaml;
using System.Xaml.Schema;
using System.Collections;
using System.Diagnostics;
using System.Reflection;
using System.Collections.Concurrent;
namespace System.Windows.Baml2006
{
// XamlType for New types defined in the BAML stream.
//
internal class WpfXamlType : XamlType
{
[Flags]
private enum BoolTypeBits
{
BamlScenerio = 0x0001,
V3Rules = 0x0002
}
const int ConcurrencyLevel = 1;
// ConcurrentDictionary's capacity should not be divisible by a small prime.
// ConcurrentDictionary grows by doing 2 * capacity + 1 and finding the first that isn't
// divisible by 2,3,5,7. Anything less than 11 would be inefficient in growing
const int Capacity = 11;
// In the "reading from BAML" senario we don't sperate Attachable from non-attachable.
// BAML is pre-approved by the compiler so we don't have to worry about incorrect usage
// BAML has higher performance with only one cache. One less dictionary lookup.
// But text can ask for <Brush StackPanel.Background="Red"> and property looks like
// an attachable property and the look-up needs to fail. [in text].
private ConcurrentDictionary<string, XamlMember> _attachableMembers;
private ConcurrentDictionary<string, XamlMember> _members;
// We share this with WpfKnownType. Any changes to the bitfield needs to be propogated to WpfKnownType
protected byte _bitField;
private bool IsBamlScenario
{
get { return GetFlag(ref _bitField, (byte)BoolTypeBits.BamlScenerio); }
set { SetFlag(ref _bitField, (byte)BoolTypeBits.BamlScenerio, value); }
}
private bool UseV3Rules
{
get { return GetFlag(ref _bitField, (byte)BoolTypeBits.V3Rules); }
set { SetFlag(ref _bitField, (byte)BoolTypeBits.V3Rules, value); }
}
protected ConcurrentDictionary<string, XamlMember> Members
{
get
{
if (_members == null)
{
_members = new ConcurrentDictionary<string, XamlMember>(ConcurrencyLevel, Capacity);
}
return _members;
}
}
protected ConcurrentDictionary<string, XamlMember> AttachableMembers
{
get
{
if (_attachableMembers == null)
{
_attachableMembers = new ConcurrentDictionary<string, XamlMember>(ConcurrencyLevel, Capacity);
}
return _attachableMembers;
}
}
public WpfXamlType(Type type, XamlSchemaContext schema, bool isBamlScenario, bool useV3Rules)
: base(type, schema)
{
IsBamlScenario = isBamlScenario;
UseV3Rules = useV3Rules;
}
protected override XamlMember LookupContentProperty()
{
XamlMember result = base.LookupContentProperty();
WpfXamlMember wpfMember = result as WpfXamlMember;
if (wpfMember != null)
{
result = wpfMember.AsContentProperty;
}
return result;
}
protected override bool LookupIsNameScope()
{
if (UnderlyingType == typeof(ResourceDictionary))
{
return false;
}
else if (typeof(ResourceDictionary).IsAssignableFrom(UnderlyingType))
{
InterfaceMapping map = UnderlyingType.GetInterfaceMap(typeof(System.Windows.Markup.INameScope));
foreach (MethodInfo method in map.TargetMethods)
{
if (method.Name.Contains("RegisterName"))
{
return method.DeclaringType != typeof(ResourceDictionary);
}
}
return false;
}
else
{
return base.LookupIsNameScope();
}
}
private XamlMember FindMember(string name, bool isAttached, bool skipReadOnlyCheck)
{
// Try looking for a known member
XamlMember member = FindKnownMember(name, isAttached);
// Return the known member if we have one
if (member != null)
{
return member;
}
// Look for members backed by DPs
member = FindDependencyPropertyBackedProperty(name, isAttached, skipReadOnlyCheck);
if (member != null)
{
return member;
}
// Look for members backed by RoutedEvents
member = FindRoutedEventBackedProperty(name, isAttached, skipReadOnlyCheck);
if (member != null)
{
return member;
}
// Ask the base class (XamlType) to find the member
// We make this call in case a user overrides or news a member
if (isAttached)
{
member = base.LookupAttachableMember(name);
}
else
{
member = base.LookupMember(name, skipReadOnlyCheck);
}
// If the base class finds one and it's declared type is a known type,
// try looking for a known property.
WpfKnownType wpfKnownType;
if (member != null && (wpfKnownType = member.DeclaringType as WpfKnownType) != null)
{
XamlMember knownMember = FindKnownMember(wpfKnownType, name, isAttached);
if (knownMember != null)
{
return knownMember;
}
}
return member;
}
protected override XamlMember LookupMember(string name, bool skipReadOnlyCheck)
{
return FindMember(name, false /* isAttached */, skipReadOnlyCheck);
}
protected override XamlMember LookupAttachableMember(string name)
{
return FindMember(name, true /* isAttached */, false /* skipReadOnlyCheck doens't matter for Attached */);
}
protected override IEnumerable<XamlMember> LookupAllMembers()
{
List<XamlMember> members = new List<XamlMember>();
var reflectedMembers = base.LookupAllMembers();
foreach (var reflectedMember in reflectedMembers)
{
var member = reflectedMember;
if (!(member is WpfXamlMember))
{
member = GetMember(member.Name);
}
members.Add(member);
}
return members;
//
}
// This will first check the cache on the type
// Then will look for a knownMember if the type is a WpfKnownType
// Then we look a DependencyProperty for the member
// If we do find one, double check to see if there is a known member that matches the DP
// This only happens on non-known types that derive from known types
// Otherwise, return null
private XamlMember FindKnownMember(string name, bool isAttachable)
{
XamlType type = this;
// Only support looking up KnownMembers on KnownTypes (otherwise we could miss a new/override member)
if (this is WpfKnownType)
{
do
{
WpfXamlType wpfXamlType = type as WpfXamlType;
XamlMember xamlMember = FindKnownMember(wpfXamlType, name, isAttachable);
if (xamlMember != null)
{
return xamlMember;
}
type = type.BaseType;
}
while (type != null);
}
return null;
}
private XamlMember FindRoutedEventBackedProperty(string name, bool isAttachable, bool skipReadOnlyCheck)
{
RoutedEvent re = EventManager.GetRoutedEventFromName(
name, UnderlyingType);
XamlMember xamlMember = null;
if (re != null)
{
// Try looking for a known member first instead of creating a new WpfXamlMember
WpfXamlType wpfXamlType = null;
if (IsBamlScenario)
{
wpfXamlType = System.Windows.Markup.XamlReader.BamlSharedSchemaContext.GetXamlType(re.OwnerType) as WpfXamlType;
}
else
{
wpfXamlType = System.Windows.Markup.XamlReader.GetWpfSchemaContext().GetXamlType(re.OwnerType) as WpfXamlType;
}
if (wpfXamlType != null)
{
xamlMember = FindKnownMember(wpfXamlType, name, isAttachable);
}
if (IsBamlScenario)
{
xamlMember = new WpfXamlMember(re, isAttachable);
}
else
{
if (isAttachable)
{
xamlMember = GetAttachedRoutedEvent(name, re);
if (xamlMember == null)
{
xamlMember = GetRoutedEvent(name, re, skipReadOnlyCheck);
}
if (xamlMember == null)
{
xamlMember = new WpfXamlMember(re, true);
}
}
else
{
xamlMember = GetRoutedEvent(name, re, skipReadOnlyCheck);
if (xamlMember == null)
{
xamlMember = GetAttachedRoutedEvent(name, re);
}
if (xamlMember == null)
{
xamlMember = new WpfXamlMember(re, false);
}
}
}
if (Members.TryAdd(name, xamlMember))
{
return xamlMember;
}
else
{
return Members[name];
}
}
return xamlMember;
}
private XamlMember FindDependencyPropertyBackedProperty(string name, bool isAttachable, bool skipReadOnlyCheck)
{
XamlMember xamlMember = null;
// If it's a dependency property, return a wrapping XamlMember
DependencyProperty property;
if ((property = DependencyProperty.FromName(name, this.UnderlyingType)) != null)
{
// Try looking for a known member first instead of creating a new WpfXamlMember
WpfXamlType wpfXamlType = null;
if (IsBamlScenario)
{
wpfXamlType = System.Windows.Markup.XamlReader.BamlSharedSchemaContext.GetXamlType(property.OwnerType) as WpfXamlType;
}
else
{
wpfXamlType = System.Windows.Markup.XamlReader.GetWpfSchemaContext().GetXamlType(property.OwnerType) as WpfXamlType;
}
if (wpfXamlType != null)
{
xamlMember = FindKnownMember(wpfXamlType, name, isAttachable);
}
if (xamlMember == null)
{
if (IsBamlScenario)
{
// In Baml Scenarios, we don't want to lookup the MemberInfo since we always know the
// type converter and we don't allows DeferringLoader (since the MarkupCompiler doesn't support it)
xamlMember = new WpfXamlMember(property, isAttachable);
}
else
{
// Try to find the MemberInfo so we can use that directly. There's no direct way to do this
// with XamlType so we'll just get the XamlMember and get the underlying member
if (isAttachable)
{
xamlMember = GetAttachedDependencyProperty(name, property);
if (xamlMember == null)
{
return null;
}
}
else
{
xamlMember = GetRegularDependencyProperty(name, property, skipReadOnlyCheck);
if (xamlMember == null)
{
xamlMember = GetAttachedDependencyProperty(name, property);
}
if (xamlMember == null)
{
xamlMember = new WpfXamlMember(property, false);
}
}
}
return CacheAndReturnXamlMember(xamlMember);
}
}
return xamlMember;
}
private XamlMember CacheAndReturnXamlMember(XamlMember xamlMember)
{
// If you are read from BAML then store everything in Members.
if (!xamlMember.IsAttachable || IsBamlScenario)
{
if (Members.TryAdd(xamlMember.Name, xamlMember))
{
return xamlMember;
}
else
{
return Members[xamlMember.Name];
}
}
else
{
if (AttachableMembers.TryAdd(xamlMember.Name, xamlMember))
{
return xamlMember;
}
else
{
return AttachableMembers[xamlMember.Name];
}
}
}
private XamlMember GetAttachedRoutedEvent(string name, RoutedEvent re)
{
XamlMember memberFromBase = base.LookupAttachableMember(name);
if (memberFromBase != null)
{
return new WpfXamlMember(re, (MethodInfo)memberFromBase.UnderlyingMember, SchemaContext, UseV3Rules);
}
return null;
}
private XamlMember GetRoutedEvent(string name, RoutedEvent re, bool skipReadOnlyCheck)
{
XamlMember memberFromBase = base.LookupMember(name, skipReadOnlyCheck);
if (memberFromBase != null)
{
return new WpfXamlMember(re, (EventInfo)memberFromBase.UnderlyingMember, SchemaContext, UseV3Rules);
}
return null;
}
private XamlMember GetAttachedDependencyProperty(string name, DependencyProperty property)
{
XamlMember memberFromBase = base.LookupAttachableMember(name);
if (memberFromBase != null)
{
return new WpfXamlMember(property,
memberFromBase.Invoker.UnderlyingGetter,
memberFromBase.Invoker.UnderlyingSetter,
SchemaContext, UseV3Rules);
}
return null;
}
private XamlMember GetRegularDependencyProperty(string name, DependencyProperty property, bool skipReadOnlyCheck)
{
XamlMember memberFromBase = base.LookupMember(name, skipReadOnlyCheck);
if (memberFromBase != null)
{
PropertyInfo propertyInfo = memberFromBase.UnderlyingMember as PropertyInfo;
if (propertyInfo != null)
{
return new WpfXamlMember(property, propertyInfo, SchemaContext, UseV3Rules);
}
else
{
throw new NotImplementedException();
}
}
return null;
}
// First try looking at the cache
// Then look to see if we have a known property on the type
private static XamlMember FindKnownMember(WpfXamlType wpfXamlType, string name, bool isAttachable)
{
XamlMember xamlMember = null;
// Look in the cache first
if (!isAttachable || wpfXamlType.IsBamlScenario)
{
if (wpfXamlType._members != null && wpfXamlType.Members.TryGetValue(name, out xamlMember))
{
return xamlMember;
}
}
else
{
if (wpfXamlType._attachableMembers != null && wpfXamlType.AttachableMembers.TryGetValue(name, out xamlMember))
{
return xamlMember;
}
}
WpfKnownType knownType = wpfXamlType as WpfKnownType;
// Only look for known properties on a known type
if (knownType != null)
{
// if it is a Baml Senario BAML doesn't really care if it was attachable or not
// so look for the property in AttachableMembers also if it wasn't found in Members.
if (!isAttachable || wpfXamlType.IsBamlScenario)
{
xamlMember = System.Windows.Markup.XamlReader.BamlSharedSchemaContext.CreateKnownMember(wpfXamlType.Name, name);
}
if (isAttachable || (xamlMember == null && wpfXamlType.IsBamlScenario))
{
xamlMember = System.Windows.Markup.XamlReader.BamlSharedSchemaContext.CreateKnownAttachableMember(wpfXamlType.Name, name);
}
if (xamlMember != null)
{
return knownType.CacheAndReturnXamlMember(xamlMember);
}
}
return null;
}
protected override XamlCollectionKind LookupCollectionKind()
{
if (UseV3Rules)
{
if (UnderlyingType.IsArray)
{
return XamlCollectionKind.Array;
}
if (typeof(IDictionary).IsAssignableFrom(UnderlyingType))
{
return XamlCollectionKind.Dictionary;
}
if (typeof(IList).IsAssignableFrom(UnderlyingType))
{
return XamlCollectionKind.Collection;
}
// Several types in V3 implemented IAddChildInternal which allowed them to be collections
if (typeof(System.Windows.Documents.DocumentReferenceCollection).IsAssignableFrom(UnderlyingType) ||
typeof(System.Windows.Documents.PageContentCollection).IsAssignableFrom(UnderlyingType))
{
return XamlCollectionKind.Collection;
}
// Doing a type comparison against XmlNamespaceMappingCollection will load System.Xml. We get around
// this by only doing the comparison if it's an ICollection<XmlNamespaceMapping>
if (typeof(ICollection<System.Windows.Data.XmlNamespaceMapping>).IsAssignableFrom(UnderlyingType)
&& IsXmlNamespaceMappingCollection)
{
return XamlCollectionKind.Collection;
}
return XamlCollectionKind.None;
}
else
{
return base.LookupCollectionKind();
}
}
// Having this directly in LookupCollectionKind forces System.Xml to load.
private bool IsXmlNamespaceMappingCollection
{
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)]
get
{
return typeof(System.Windows.Data.XmlNamespaceMappingCollection).IsAssignableFrom(UnderlyingType);
}
}
internal XamlMember FindBaseXamlMember(string name, bool isAttachable)
{
if (isAttachable)
{
return base.LookupAttachableMember(name);
}
else
{
return base.LookupMember(name, true);
}
}
internal static bool GetFlag(ref byte bitField, byte typeBit)
{
return (bitField & typeBit) != 0;
}
internal static void SetFlag(ref byte bitField, byte typeBit, bool value)
{
if (value)
{
bitField = (byte)(bitField | typeBit);
}
else
{
bitField = (byte)(bitField & ~typeBit);
}
}
}
}
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