94 lines
2.9 KiB
JavaScript
Executable File
94 lines
2.9 KiB
JavaScript
Executable File
import { AsyncAction } from './AsyncAction';
|
|
import { AsyncScheduler } from './AsyncScheduler';
|
|
export class VirtualTimeScheduler extends AsyncScheduler {
|
|
constructor(SchedulerAction = VirtualAction, maxFrames = Number.POSITIVE_INFINITY) {
|
|
super(SchedulerAction, () => this.frame);
|
|
this.maxFrames = maxFrames;
|
|
this.frame = 0;
|
|
this.index = -1;
|
|
}
|
|
/**
|
|
* Prompt the Scheduler to execute all of its queued actions, therefore
|
|
* clearing its queue.
|
|
* @return {void}
|
|
*/
|
|
flush() {
|
|
const { actions, maxFrames } = this;
|
|
let error, action;
|
|
while ((action = actions.shift()) && (this.frame = action.delay) <= maxFrames) {
|
|
if (error = action.execute(action.state, action.delay)) {
|
|
break;
|
|
}
|
|
}
|
|
if (error) {
|
|
while (action = actions.shift()) {
|
|
action.unsubscribe();
|
|
}
|
|
throw error;
|
|
}
|
|
}
|
|
}
|
|
VirtualTimeScheduler.frameTimeFactor = 10;
|
|
/**
|
|
* We need this JSDoc comment for affecting ESDoc.
|
|
* @ignore
|
|
* @extends {Ignored}
|
|
*/
|
|
export class VirtualAction extends AsyncAction {
|
|
constructor(scheduler, work, index = scheduler.index += 1) {
|
|
super(scheduler, work);
|
|
this.scheduler = scheduler;
|
|
this.work = work;
|
|
this.index = index;
|
|
this.active = true;
|
|
this.index = scheduler.index = index;
|
|
}
|
|
schedule(state, delay = 0) {
|
|
if (!this.id) {
|
|
return super.schedule(state, delay);
|
|
}
|
|
this.active = false;
|
|
// If an action is rescheduled, we save allocations by mutating its state,
|
|
// pushing it to the end of the scheduler queue, and recycling the action.
|
|
// But since the VirtualTimeScheduler is used for testing, VirtualActions
|
|
// must be immutable so they can be inspected later.
|
|
const action = new VirtualAction(this.scheduler, this.work);
|
|
this.add(action);
|
|
return action.schedule(state, delay);
|
|
}
|
|
requestAsyncId(scheduler, id, delay = 0) {
|
|
this.delay = scheduler.frame + delay;
|
|
const { actions } = scheduler;
|
|
actions.push(this);
|
|
actions.sort(VirtualAction.sortActions);
|
|
return true;
|
|
}
|
|
recycleAsyncId(scheduler, id, delay = 0) {
|
|
return undefined;
|
|
}
|
|
_execute(state, delay) {
|
|
if (this.active === true) {
|
|
return super._execute(state, delay);
|
|
}
|
|
}
|
|
static sortActions(a, b) {
|
|
if (a.delay === b.delay) {
|
|
if (a.index === b.index) {
|
|
return 0;
|
|
}
|
|
else if (a.index > b.index) {
|
|
return 1;
|
|
}
|
|
else {
|
|
return -1;
|
|
}
|
|
}
|
|
else if (a.delay > b.delay) {
|
|
return 1;
|
|
}
|
|
else {
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
//# sourceMappingURL=VirtualTimeScheduler.js.map
|