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Merge from vscode 31e03b8ffbb218a87e3941f2b63a249f061fe0e4 (#4986)

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This commit is contained in:
Anthony Dresser
2019-04-10 16:29:23 -07:00
committed by GitHub
parent 18c54f41bd
commit 8315dacda4
320 changed files with 5540 additions and 3822 deletions
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27
src/vs/base/common/event.ts
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@@ -265,33 +265,6 @@ export namespace Event {
return emitter.event;
}
/**
* Similar to `buffer` but it buffers indefinitely and repeats
* the buffered events to every new listener.
*/
export function echo<T>(event: Event<T>, nextTick = false, buffer: T[] = []): Event<T> {
buffer = buffer.slice();
event(e => {
buffer.push(e);
emitter.fire(e);
});
const flush = (listener: (e: T) => any, thisArgs?: any) => buffer.forEach(e => listener.call(thisArgs, e));
const emitter = new Emitter<T>({
onListenerDidAdd(emitter: Emitter<T>, listener: (e: T) => any, thisArgs?: any) {
if (nextTick) {
setTimeout(() => flush(listener, thisArgs));
} else {
flush(listener, thisArgs);
}
}
});
return emitter.event;
}
export interface IChainableEvent<T> {
event: Event<T>;
map<O>(fn: (i: T) => O): IChainableEvent<O>;