|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Reflection;
using System.Xaml;
using System.Xaml.Schema;
namespace System.Windows.Baml2006
{
internal class WpfXamlMember : XamlMember, System.Windows.Markup.IProvideValueTarget
{
[Flags]
private enum BoolMemberBits
{
UseV3Rules = 0x0001,
BamlMember = 0x0002,
UnderlyingMemberIsKnown = 0x0004,
ApplyGetterFallback = 0x0008,
}
public WpfXamlMember(DependencyProperty dp, bool isAttachable)
: base(dp.Name,
System.Windows.Markup.XamlReader.BamlSharedSchemaContext.GetXamlType(dp.OwnerType),
isAttachable)
{
DependencyProperty = dp;
_useV3Rules = true;
_isBamlMember = true;
_underlyingMemberIsKnown = false;
}
public WpfXamlMember(RoutedEvent re, bool isAttachable)
: base(re.Name,
System.Windows.Markup.XamlReader.BamlSharedSchemaContext.GetXamlType(re.OwnerType),
isAttachable)
{
RoutedEvent = re;
_useV3Rules = true;
_isBamlMember = true;
_underlyingMemberIsKnown = false;
}
public WpfXamlMember(DependencyProperty dp,
MethodInfo getter,
MethodInfo setter,
XamlSchemaContext schemaContext,
bool useV3Rules)
: base(dp.Name, getter, setter, schemaContext)
{
DependencyProperty = dp;
_useV3Rules = useV3Rules;
_underlyingMemberIsKnown = true;
}
public WpfXamlMember(DependencyProperty dp,
PropertyInfo property,
XamlSchemaContext schemaContext,
bool useV3Rules)
: base (property, schemaContext)
{
DependencyProperty = dp;
_useV3Rules = useV3Rules;
_underlyingMemberIsKnown = true;
}
public WpfXamlMember(RoutedEvent re,
MethodInfo setter,
XamlSchemaContext schemaContext,
bool useV3Rules)
: base(re.Name, setter, schemaContext)
{
RoutedEvent = re;
_useV3Rules = useV3Rules;
_underlyingMemberIsKnown = true;
}
public WpfXamlMember(RoutedEvent re,
EventInfo eventInfo,
XamlSchemaContext schemaContext,
bool useV3Rules)
: base(eventInfo, schemaContext)
{
RoutedEvent = re;
_useV3Rules = useV3Rules;
_underlyingMemberIsKnown = true;
}
// Protected ctor that is called by WpfKnownMember for known properties that aren't DPs
protected WpfXamlMember(string name, XamlType declaringType, bool isAttachable)
: base(name, declaringType, isAttachable)
{
_useV3Rules = true;
_isBamlMember = true;
_underlyingMemberIsKnown = false;
}
public DependencyProperty DependencyProperty { get; set; }
public RoutedEvent RoutedEvent { get; set; }
internal bool ApplyGetterFallback
{
get { return WpfXamlType.GetFlag(ref _bitField, (byte)BoolMemberBits.ApplyGetterFallback); }
private set { WpfXamlType.SetFlag(ref _bitField, (byte)BoolMemberBits.ApplyGetterFallback, value); }
}
// v3 parser had a fallback for retrieved DP content properties. If the DP was null, it would
// call the CLR property getter, in case the property was lazily initialized. If necessary,
// we return a version of this property with the fallback logic.
internal WpfXamlMember AsContentProperty
{
get
{
if (_asContentProperty == null)
{
_asContentProperty = GetAsContentProperty();
}
return _asContentProperty;
}
}
protected virtual WpfXamlMember GetAsContentProperty()
{
if (DependencyProperty == null)
{
// Not a DP, no fallback needed
return this;
}
Debug.Assert(!IsAttachable && !IsEvent);
WpfXamlMember result = null;
if (_underlyingMemberIsKnown)
{
PropertyInfo underlyingProperty = UnderlyingMember as PropertyInfo;
if (underlyingProperty == null)
{
// No underlying CLR property, no fallback needed
return this;
}
result = new WpfXamlMember(DependencyProperty, underlyingProperty, DeclaringType.SchemaContext, _useV3Rules);
}
else
{
result = new WpfXamlMember(DependencyProperty, false /*isAttachable*/);
}
result.ApplyGetterFallback = true;
return result;
}
protected override XamlType LookupType()
{
if (DependencyProperty != null)
{
if (_isBamlMember)
{
return System.Windows.Markup.XamlReader.BamlSharedSchemaContext.GetXamlType(DependencyProperty.PropertyType);
}
else
{
return System.Windows.Markup.XamlReader.GetWpfSchemaContext().GetXamlType(DependencyProperty.PropertyType);
}
}
else if (RoutedEvent != null)
{
if (_isBamlMember)
{
return System.Windows.Markup.XamlReader.BamlSharedSchemaContext.GetXamlType(RoutedEvent.HandlerType);
}
else
{
return System.Windows.Markup.XamlReader.GetWpfSchemaContext().GetXamlType(RoutedEvent.HandlerType);
}
}
else
{
return base.LookupType();
}
}
protected override MemberInfo LookupUnderlyingMember()
{
MemberInfo member = base.LookupUnderlyingMember();
if (member == null)
{
if (BaseUnderlyingMember != null)
{
member = BaseUnderlyingMember.UnderlyingMember;
}
}
_underlyingMemberIsKnown = true;
return member;
}
protected override MethodInfo LookupUnderlyingSetter()
{
// Want to look up the base's UnderlyingSetter in case it's already there
MethodInfo setter = base.LookupUnderlyingSetter();
if (setter == null)
{
if (BaseUnderlyingMember != null)
{
setter = BaseUnderlyingMember.Invoker.UnderlyingSetter;
}
}
_underlyingMemberIsKnown = true;
return setter;
}
protected override MethodInfo LookupUnderlyingGetter()
{
// Want to look up the base's UnderlyingSetter in case it's already there
MethodInfo getter = base.LookupUnderlyingGetter();
if (getter == null)
{
if (BaseUnderlyingMember != null)
{
getter = BaseUnderlyingMember.Invoker.UnderlyingGetter;
}
}
_underlyingMemberIsKnown = true;
return getter;
}
protected override bool LookupIsReadOnly()
{
if (DependencyProperty != null)
{
return DependencyProperty.ReadOnly;
}
return base.LookupIsReadOnly();
}
protected override bool LookupIsEvent()
{
if (RoutedEvent != null)
{
return true;
}
return false;
}
protected override XamlMemberInvoker LookupInvoker()
{
return new WpfMemberInvoker(this);
}
protected override bool LookupIsUnknown()
{
return false;
}
// The Markup compiler doesn't support XamlDeferringLoader so we don't need to look it up in BAML scenarios.
protected override XamlValueConverter<XamlDeferringLoader> LookupDeferringLoader()
{
if (_useV3Rules)
{
return null;
}
else
{
return base.LookupDeferringLoader();
}
}
private bool _useV3Rules
{
get { return WpfXamlType.GetFlag(ref _bitField, (byte)BoolMemberBits.UseV3Rules); }
set { WpfXamlType.SetFlag(ref _bitField, (byte)BoolMemberBits.UseV3Rules, value); }
}
private bool _isBamlMember
{
get { return WpfXamlType.GetFlag(ref _bitField, (byte)BoolMemberBits.BamlMember); }
set { WpfXamlType.SetFlag(ref _bitField, (byte)BoolMemberBits.BamlMember, value); }
}
private bool _underlyingMemberIsKnown
{
get { return WpfXamlType.GetFlag(ref _bitField, (byte)BoolMemberBits.UnderlyingMemberIsKnown); }
set { WpfXamlType.SetFlag(ref _bitField, (byte)BoolMemberBits.UnderlyingMemberIsKnown, value); }
}
#region IProvideValueTarget Members
object System.Windows.Markup.IProvideValueTarget.TargetObject
{
get { throw new NotSupportedException(); }
}
object System.Windows.Markup.IProvideValueTarget.TargetProperty
{
get
{
if (DependencyProperty != null)
{
return DependencyProperty;
}
else
{
return UnderlyingMember;
}
}
}
#endregion
private XamlMember BaseUnderlyingMember
{
get
{
if (_baseUnderlyingMember == null)
{
WpfXamlType wpfXType = DeclaringType as WpfXamlType;
_baseUnderlyingMember = wpfXType.FindBaseXamlMember(Name, IsAttachable);
if (_baseUnderlyingMember == null)
{
// Find the attached or regular property
_baseUnderlyingMember = wpfXType.FindBaseXamlMember(Name, !IsAttachable);
}
}
return _baseUnderlyingMember;
}
}
private byte _bitField;
private XamlMember _baseUnderlyingMember;
private WpfXamlMember _asContentProperty;
}
}
|