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ClearScriptForUnity3d/ClearScript/HostType.cs at Unity3D · vovgou/ClearScriptForUnity3d · GitHub
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
using
System
;
using
System
.
Diagnostics
;
using
System
.
Linq
;
using
System
.
Reflection
;
using
Microsoft
.
ClearScript
.
Util
;
namespace
Microsoft
.
ClearScript
{
internal
sealed
class
HostType
:
HostTarget
,
IScriptableObject
{
private
HostType
(
Type
type
)
:
this
(
new
[
]
{
type
}
)
{
}
private
HostType
(
Type
[
]
types
)
{
Debug
.
Assert
(
(
types
!=
null
)
&&
(
types
.
Length
>
0
)
)
;
var
nestingGroups
=
types
.
GroupBy
(
type
=>
type
.
IsNested
)
.
ToIList
(
)
;
if
(
nestingGroups
.
Count
!=
1
)
{
throw
new
NotSupportedException
(
"Cannot create type wrapper for multiple unrelated types"
)
;
}
var
nested
=
nestingGroups
[
0
]
.
Key
;
if
(
nested
)
{
if
(
types
.
GroupBy
(
type
=>
type
.
DeclaringType
)
.
Count
(
)
>
1
)
{
throw
new
NotSupportedException
(
"Cannot create type wrapper for multiple unrelated types"
)
;
}
}
else
{
if
(
types
.
GroupBy
(
type
=>
type
.
GetLocator
(
)
)
.
Count
(
)
>
1
)
{
throw
new
NotSupportedException
(
"Cannot create type wrapper for multiple unrelated types"
)
;
}
}
var
specificTypes
=
types
.
Where
(
testType
=>
testType
.
IsSpecific
(
)
)
;
if
(
specificTypes
.
Count
(
)
>
1
)
{
throw
new
NotSupportedException
(
"Cannot create type wrapper for multiple specific types"
)
;
}
Types
=
types
;
}
public
static
HostType
Wrap
(
Type
type
)
{
return
(
type
!=
null
)
?
new
HostType
(
type
)
:
null
;
}
public
static
HostType
Wrap
(
Type
[
]
types
)
{
return
(
(
types
!=
null
)
&&
(
types
.
Length
>
0
)
)
?
new
HostType
(
types
)
:
null
;
}
public
Type
[
]
Types
{
get
;
}
public
Type
GetSpecificType
(
)
{
var
type
=
GetSpecificTypeNoThrow
(
)
;
if
(
type
==
null
)
{
throw
new
InvalidOperationException
(
MiscHelpers
.
FormatInvariant
(
"'{0}' requires type arguments"
,
Types
[
0
]
.
GetRootName
(
)
)
)
;
}
return
type
;
}
public
Type
GetTypeArg
(
)
{
var
type
=
GetSpecificType
(
)
;
if
(
type
.
IsStatic
(
)
)
{
throw
new
InvalidOperationException
(
MiscHelpers
.
FormatInvariant
(
"'{0}': static types cannot be used as type arguments"
,
type
.
GetRootName
(
)
)
)
;
}
if
(
type
.
IsUnknownCOMObject
(
)
)
{
throw
new
InvalidOperationException
(
"Unknown COM/ActiveX types cannot be used as type arguments"
)
;
}
return
type
;
}
public
Type
GetTypeArgNoThrow
(
)
{
var
type
=
GetSpecificTypeNoThrow
(
)
;
return
(
(
type
==
null
)
||
type
.
IsStatic
(
)
||
type
.
IsUnknownCOMObject
(
)
)
?
null
:
type
;
}
private
Type
GetSpecificTypeNoThrow
(
)
{
return
Types
.
FirstOrDefault
(
testType
=>
testType
.
IsSpecific
(
)
)
;
}
#region Object overrides
public
override
string
ToString
(
)
{
var
type
=
GetSpecificTypeNoThrow
(
)
;
if
(
type
!=
null
)
{
return
MiscHelpers
.
FormatInvariant
(
"HostType:{0}"
,
type
.
GetFriendlyName
(
)
)
;
}
var
typeArgs
=
Types
[
0
]
.
GetGenericArguments
(
)
;
var
parentPrefix
=
string
.
Empty
;
if
(
Types
[
0
]
.
IsNested
)
{
var
parentType
=
Types
[
0
]
.
DeclaringType
.
MakeSpecificType
(
typeArgs
)
;
parentPrefix
=
parentType
.
GetFriendlyName
(
)
+
"."
;
}
return
MiscHelpers
.
FormatInvariant
(
(
Types
.
Length
>
1
)
?
"HostTypeGroup:{0}{1}"
:
"GenericHostType:{0}{1}"
,
parentPrefix
,
Types
[
0
]
.
GetRootName
(
)
)
;
}
#endregion
#region HostTarget overrides
public
override
Type
Type
=>
GetSpecificTypeNoThrow
(
)
??
Types
[
0
]
;
public
override
object
Target
=>
this
;
public
override
object
InvokeTarget
{
get
{
GetSpecificType
(
)
;
return
null
;
}
}
public
override
object
DynamicInvokeTarget
=>
GetSpecificType
(
)
;
public
override
HostTargetFlags
GetFlags
(
IHostInvokeContext
context
)
{
var
type
=
GetSpecificTypeNoThrow
(
)
;
return
(
type
!=
null
)
?
HostTargetFlags
.
AllowStaticMembers
:
HostTargetFlags
.
None
;
}
public
override
string
[
]
GetAuxPropertyNames
(
IHostInvokeContext
context
,
BindingFlags
bindFlags
)
{
var
type
=
GetSpecificTypeNoThrow
(
)
;
if
(
type
!=
null
)
{
return
type
.
GetScriptableNestedTypes
(
bindFlags
,
context
.
AccessContext
,
context
.
DefaultAccess
)
.
Select
(
testType
=>
testType
.
GetRootName
(
)
)
.
Distinct
(
)
.
ToArray
(
)
;
}
return
ArrayHelpers
.
GetEmptyArray
<
string
>
(
)
;
}
public
override
bool
TryInvokeAuxMember
(
IHostInvokeContext
context
,
string
name
,
BindingFlags
invokeFlags
,
object
[
]
args
,
object
[
]
bindArgs
,
out
object
result
)
{
var
type
=
GetSpecificTypeNoThrow
(
)
;
if
(
type
!=
null
)
{
var
nestedTypes
=
type
.
GetScriptableNestedTypes
(
invokeFlags
,
context
.
AccessContext
,
context
.
DefaultAccess
)
.
Where
(
testType
=>
testType
.
GetRootName
(
)
==
name
)
.
ToIList
(
)
;
if
(
nestedTypes
.
Count
>
0
)
{
var
tempResult
=
Wrap
(
nestedTypes
.
Select
(
testType
=>
testType
.
ApplyTypeArguments
(
type
.
GetGenericArguments
(
)
)
)
.
ToArray
(
)
)
;
if
(
invokeFlags
.
HasFlag
(
BindingFlags
.
InvokeMethod
)
)
{
if
(
tempResult
.
TryInvoke
(
context
,
invokeFlags
,
args
,
bindArgs
,
out
result
)
)
{
return
true
;
}
if
(
!
invokeFlags
.
HasFlag
(
BindingFlags
.
GetField
)
&&
!
invokeFlags
.
HasFlag
(
BindingFlags
.
GetProperty
)
)
{
return
false
;
}
}
result
=
tempResult
;
return
true
;
}
}
result
=
null
;
return
false
;
}
public
override
bool
TryInvoke
(
IHostInvokeContext
context
,
BindingFlags
invokeFlags
,
object
[
]
args
,
object
[
]
bindArgs
,
out
object
result
)
{
if
(
!
invokeFlags
.
HasFlag
(
BindingFlags
.
InvokeMethod
)
||
(
args
.
Length
<
1
)
)
{
result
=
null
;
return
false
;
}
if
(
!
args
.
All
(
arg
=>
arg
is
HostType
)
)
{
throw
new
ArgumentException
(
"Invalid generic type argument"
)
;
}
var
templates
=
Types
.
Where
(
type
=>
!
type
.
IsSpecific
(
)
)
.
ToArray
(
)
;
var
typeArgs
=
args
.
Cast
<
HostType
>
(
)
.
Select
(
hostType
=>
hostType
.
GetTypeArg
(
)
)
.
ToArray
(
)
;
var
template
=
templates
.
FirstOrDefault
(
testTemplate
=>
testTemplate
.
GetGenericParamCount
(
)
==
typeArgs
.
Length
)
;
if
(
template
==
null
)
{
throw
new
TypeLoadException
(
MiscHelpers
.
FormatInvariant
(
"Could not find a matching generic type definition for '{0}'"
,
templates
[
0
]
.
GetRootName
(
)
)
)
;
}
result
=
Wrap
(
template
.
MakeSpecificType
(
typeArgs
)
)
;
return
true
;
}
public
override
Invocability
GetInvocability
(
BindingFlags
bindFlags
,
Type
accessContext
,
ScriptAccess
defaultAccess
,
bool
ignoreDynamic
)
{
return
Invocability
.
Delegate
;
}
#endregion
#region IScriptableObject implementation
void
IScriptableObject
.
OnExposedToScriptCode
(
ScriptEngine
engine
)
{
if
(
engine
!=
null
)
{
var
specificType
=
GetSpecificTypeNoThrow
(
)
;
if
(
specificType
!=
null
)
{
engine
.
ProcessExtensionMethodType
(
specificType
)
;
}
}
}
#endregion
}
}
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