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体验新版 GitCode,发现更多精彩内容 >>
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2a8bab87
编写于
9月 15, 2016
作者:
J
Joao Moreno
浏览文件
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电子邮件补丁
差异文件
event: buffer
上级
df3fd2dc
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
67 addition
and
3 deletion
+67
-3
src/vs/base/common/event.ts
src/vs/base/common/event.ts
+67
-3
未找到文件。
src/vs/base/common/event.ts
浏览文件 @
2a8bab87
...
...
@@ -26,6 +26,7 @@ export default Event;
export
interface
EmitterOptions
{
onFirstListenerAdd
?:
Function
;
onFirstListenerDidAdd
?:
Function
;
onLastListenerRemove
?:
Function
;
}
...
...
@@ -72,11 +73,19 @@ export class Emitter<T> {
if
(
!
this
.
_callbacks
)
{
this
.
_callbacks
=
new
CallbackList
();
}
if
(
this
.
_options
&&
this
.
_options
.
onFirstListenerAdd
&&
this
.
_callbacks
.
isEmpty
())
{
const
firstListener
=
this
.
_callbacks
.
isEmpty
();
if
(
firstListener
&&
this
.
_options
&&
this
.
_options
.
onFirstListenerAdd
)
{
this
.
_options
.
onFirstListenerAdd
(
this
);
}
this
.
_callbacks
.
add
(
listener
,
thisArgs
);
if
(
firstListener
&&
this
.
_options
&&
this
.
_options
.
onFirstListenerDidAdd
)
{
this
.
_options
.
onFirstListenerDidAdd
(
this
);
}
let
result
:
IDisposable
;
result
=
{
dispose
:
()
=>
{
...
...
@@ -263,11 +272,11 @@ enum EventDelayerState {
* ```
* const emitter: Emitter;
* const delayer = new EventDelayer();
* const delayedEvent = delayer.
delay
(emitter.event);
* const delayedEvent = delayer.
wrapEvent
(emitter.event);
*
* delayedEvent(console.log);
*
* delayer.
wrap
(() => {
* delayer.
bufferEvents
(() => {
* emitter.fire(); // event will not be fired yet
* });
*
...
...
@@ -342,4 +351,59 @@ export function chain<T>(event: Event<T>): IChainableEvent<T> {
export
function
stopwatch
<
T
>
(
event
:
Event
<
T
>
):
Event
<
number
>
{
const
start
=
new
Date
().
getTime
();
return
mapEvent
(
once
(
event
),
_
=>
new
Date
().
getTime
()
-
start
);
}
/**
* Buffers the provided event until a first listener comes
* along, at which point fire all the events at once and
* pipe the event from then on.
*
* ```typescript
* const emitter = new Emitter<number>();
* const event = emitter.event;
* const bufferedEvent = buffer(event);
*
* emitter.fire(1);
* emitter.fire(2);
* emitter.fire(3);
* // nothing...
*
* const listener = bufferedEvent(num => console.log(num));
* // 1, 2, 3
*
* emitter.fire(4);
* // 4
* ```
*/
export
function
buffer
<
T
>
(
event
:
Event
<
T
>
):
Event
<
T
>
{
let
buffer
:
T
[]
=
[];
let
listener
=
event
(
e
=>
{
if
(
buffer
)
{
buffer
.
push
(
e
);
}
else
{
emitter
.
fire
(
e
);
}
});
const
emitter
=
new
Emitter
<
T
>
({
onFirstListenerAdd
()
{
if
(
!
listener
)
{
listener
=
event
(
e
=>
emitter
.
fire
(
e
));
}
},
onFirstListenerDidAdd
()
{
if
(
buffer
)
{
buffer
.
forEach
(
e
=>
emitter
.
fire
(
e
));
buffer
=
null
;
}
},
onLastListenerRemove
()
{
listener
.
dispose
();
listener
=
null
;
}
});
return
emitter
.
event
;
}
\ No newline at end of file
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