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体验新版 GitCode,发现更多精彩内容 >>
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f56c9e2b
编写于
7月 06, 2017
作者:
R
Rob Lourens
浏览文件
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浏览文件
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电子邮件补丁
差异文件
Fix #29642 - debounced event fired multiple times for a single call with `leading = true`
上级
1291d9e8
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
44 addition
and
1 deletion
+44
-1
src/vs/base/common/event.ts
src/vs/base/common/event.ts
+8
-1
src/vs/base/test/common/event.test.ts
src/vs/base/test/common/event.test.ts
+36
-0
未找到文件。
src/vs/base/common/event.ts
浏览文件 @
f56c9e2b
...
@@ -315,10 +315,13 @@ export function debounceEvent<I, O>(event: Event<I>, merger: (last: O, event: I)
...
@@ -315,10 +315,13 @@ export function debounceEvent<I, O>(event: Event<I>, merger: (last: O, event: I)
let
subscription
:
IDisposable
;
let
subscription
:
IDisposable
;
let
output
:
O
;
let
output
:
O
;
let
handle
:
number
;
let
handle
:
number
;
let
numDebouncedCalls
=
0
;
const
emitter
=
new
Emitter
<
O
>
({
const
emitter
=
new
Emitter
<
O
>
({
onFirstListenerAdd
()
{
onFirstListenerAdd
()
{
subscription
=
event
(
cur
=>
{
subscription
=
event
(
cur
=>
{
numDebouncedCalls
++
;
output
=
merger
(
output
,
cur
);
output
=
merger
(
output
,
cur
);
if
(
!
handle
&&
leading
)
{
if
(
!
handle
&&
leading
)
{
emitter
.
fire
(
output
);
emitter
.
fire
(
output
);
...
@@ -328,8 +331,12 @@ export function debounceEvent<I, O>(event: Event<I>, merger: (last: O, event: I)
...
@@ -328,8 +331,12 @@ export function debounceEvent<I, O>(event: Event<I>, merger: (last: O, event: I)
handle
=
setTimeout
(()
=>
{
handle
=
setTimeout
(()
=>
{
let
_output
=
output
;
let
_output
=
output
;
output
=
undefined
;
output
=
undefined
;
emitter
.
fire
(
_output
);
if
(
!
leading
||
numDebouncedCalls
>
1
)
{
emitter
.
fire
(
_output
);
}
handle
=
null
;
handle
=
null
;
numDebouncedCalls
=
0
;
},
delay
);
},
delay
);
});
});
},
},
...
...
src/vs/base/test/common/event.test.ts
浏览文件 @
f56c9e2b
...
@@ -209,6 +209,42 @@ suite('Event', function () {
...
@@ -209,6 +209,42 @@ suite('Event', function () {
doc
.
setText
(
'
2
'
);
doc
.
setText
(
'
2
'
);
doc
.
setText
(
'
3
'
);
doc
.
setText
(
'
3
'
);
});
});
test
(
'
Debounce Event - leading
'
,
function
(
done
:
()
=>
void
)
{
const
emitter
=
new
Emitter
<
void
>
();
let
debounced
=
debounceEvent
(
emitter
.
event
,
(
l
,
e
)
=>
e
,
0
,
/*leading=*/
true
);
let
calls
=
0
;
debounced
(()
=>
{
calls
++
;
});
// If the source event is fired once, the debounced (on the leading edge) event should be fired only once
emitter
.
fire
();
setTimeout
(()
=>
{
assert
.
equal
(
calls
,
1
);
done
();
});
});
test
(
'
Debounce Event - leading
'
,
function
(
done
:
()
=>
void
)
{
const
emitter
=
new
Emitter
<
void
>
();
let
debounced
=
debounceEvent
(
emitter
.
event
,
(
l
,
e
)
=>
e
,
0
,
/*leading=*/
true
);
let
calls
=
0
;
debounced
(()
=>
{
calls
++
;
});
// If the source event is fired multiple times, the debounced (on the leading edge) event should be fired twice
emitter
.
fire
();
emitter
.
fire
();
emitter
.
fire
();
setTimeout
(()
=>
{
assert
.
equal
(
calls
,
2
);
done
();
});
});
});
});
suite
(
'
Event utils
'
,
()
=>
{
suite
(
'
Event utils
'
,
()
=>
{
...
...
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