1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
#if !NO_PERF
using System;
using System.Reactive.Concurrency;
using System.Reactive.Disposables;
using System.Reflection;
using System.Threading;
//
// BREAKING CHANGE v2 > v1.x - FromEvent[Pattern] now has an implicit SubscribeOn and Publish operation.
//
// See FromEvent.cs for more information.
//
namespace System.Reactive.Linq.Observαble
{
class FromEventPattern
{
public class τ<TDelegate, TEventArgs> : ClassicEventProducer<TDelegate, EventPattern<TEventArgs>>
#if !NO_EVENTARGS_CONSTRAINT
where TEventArgs : EventArgs
#endif
{
private readonly Func<EventHandler<TEventArgs>, TDelegate> _conversion;
public τ(Action<TDelegate> addHandler, Action<TDelegate> removeHandler, IScheduler scheduler)
: base(addHandler, removeHandler, scheduler)
{
}
public τ(Func<EventHandler<TEventArgs>, TDelegate> conversion, Action<TDelegate> addHandler, Action<TDelegate> removeHandler, IScheduler scheduler)
: base(addHandler, removeHandler, scheduler)
{
_conversion = conversion;
}
protected override TDelegate GetHandler(Action<EventPattern<TEventArgs>> onNext)
{
var handler = default(TDelegate);
if (_conversion == null)
{
Action<object, TEventArgs> h = (sender, eventArgs) => onNext(new EventPattern<TEventArgs>(sender, eventArgs));
handler = ReflectionUtils.CreateDelegate<TDelegate>(h, typeof(Action<object, TEventArgs>).GetMethod("Invoke"));
}
else
{
handler = _conversion((sender, eventArgs) => onNext(new EventPattern<TEventArgs>(sender, eventArgs)));
}
return handler;
}
}
public class τ<TDelegate, TSender, TEventArgs> : ClassicEventProducer<TDelegate, EventPattern<TSender, TEventArgs>>
#if !NO_EVENTARGS_CONSTRAINT
where TEventArgs : EventArgs
#endif
{
public τ(Action<TDelegate> addHandler, Action<TDelegate> removeHandler, IScheduler scheduler)
: base(addHandler, removeHandler, scheduler)
{
}
protected override TDelegate GetHandler(Action<EventPattern<TSender, TEventArgs>> onNext)
{
Action<TSender, TEventArgs> h = (sender, eventArgs) => onNext(new EventPattern<TSender, TEventArgs>(sender, eventArgs));
return ReflectionUtils.CreateDelegate<TDelegate>(h, typeof(Action<TSender, TEventArgs>).GetMethod("Invoke"));
}
}
public class ρ<TSender, TEventArgs, TResult> : EventProducer<Delegate, TResult>
{
private readonly object _target;
private readonly Type _delegateType;
private readonly MethodInfo _addMethod;
private readonly MethodInfo _removeMethod;
private readonly Func<TSender, TEventArgs, TResult> _getResult;
#if HAS_WINRT
private readonly bool _isWinRT;
#endif
public ρ(object target, Type delegateType, MethodInfo addMethod, MethodInfo removeMethod, Func<TSender, TEventArgs, TResult> getResult, bool isWinRT, IScheduler scheduler)
: base(scheduler)
{
#if HAS_WINRT
_isWinRT = isWinRT;
#else
System.Diagnostics.Debug.Assert(!isWinRT);
#endif
_target = target;
_delegateType = delegateType;
_addMethod = addMethod;
_removeMethod = removeMethod;
_getResult = getResult;
}
protected override Delegate GetHandler(Action<TResult> onNext)
{
Action<TSender, TEventArgs> h = (sender, eventArgs) => onNext(_getResult(sender, eventArgs));
return ReflectionUtils.CreateDelegate(_delegateType, h, typeof(Action<TSender, TEventArgs>).GetMethod("Invoke"));
}
protected override IDisposable AddHandler(Delegate handler)
{
var removeHandler = default(Action);
try
{
#if HAS_WINRT
if (_isWinRT)
{
var token = _addMethod.Invoke(_target, new object[] { handler });
removeHandler = () => _removeMethod.Invoke(_target, new object[] { token });
}
else
#endif
{
_addMethod.Invoke(_target, new object[] { handler });
removeHandler = () => _removeMethod.Invoke(_target, new object[] { handler });
}
}
catch (TargetInvocationException tie)
{
throw tie.InnerException;
}
return Disposable.Create(() =>
{
try
{
removeHandler();
}
catch (TargetInvocationException tie)
{
throw tie.InnerException;
}
});
}
}
}
}
#endif
|
