initial commit: scaffolding

1 files changed, 45 insertions, 0 deletions

diff --git a/node_modules/rxjs/src/internal/scheduler/AsapAction.ts b/node_modules/rxjs/src/internal/scheduler/AsapAction.ts
new file mode 100644
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+++ b/node_modules/rxjs/src/internal/scheduler/AsapAction.ts
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+import { AsyncAction } from './AsyncAction';
+import { AsapScheduler } from './AsapScheduler';
+import { SchedulerAction } from '../types';
+import { immediateProvider } from './immediateProvider';
+import { TimerHandle } from './timerHandle';
+
+export class AsapAction<T> extends AsyncAction<T> {
+  constructor(protected scheduler: AsapScheduler, protected work: (this: SchedulerAction<T>, state?: T) => void) {
+    super(scheduler, work);
+  }
+
+  protected requestAsyncId(scheduler: AsapScheduler, id?: TimerHandle, delay: number = 0): TimerHandle {
+    // If delay is greater than 0, request as an async action.
+    if (delay !== null && delay > 0) {
+      return super.requestAsyncId(scheduler, id, delay);
+    }
+    // Push the action to the end of the scheduler queue.
+    scheduler.actions.push(this);
+    // If a microtask has already been scheduled, don't schedule another
+    // one. If a microtask hasn't been scheduled yet, schedule one now. Return
+    // the current scheduled microtask id.
+    return scheduler._scheduled || (scheduler._scheduled = immediateProvider.setImmediate(scheduler.flush.bind(scheduler, undefined)));
+  }
+
+  protected recycleAsyncId(scheduler: AsapScheduler, id?: TimerHandle, delay: number = 0): TimerHandle | undefined {
+    // If delay exists and is greater than 0, or if the delay is null (the
+    // action wasn't rescheduled) but was originally scheduled as an async
+    // action, then recycle as an async action.
+    if (delay != null ? delay > 0 : this.delay > 0) {
+      return super.recycleAsyncId(scheduler, id, delay);
+    }
+    // If the scheduler queue has no remaining actions with the same async id,
+    // cancel the requested microtask and set the scheduled flag to undefined
+    // so the next AsapAction will request its own.
+    const { actions } = scheduler;
+    if (id != null && actions[actions.length - 1]?.id !== id) {
+      immediateProvider.clearImmediate(id);
+      if (scheduler._scheduled === id) {
+        scheduler._scheduled = undefined;
+      }
+    }
+    // Return undefined so the action knows to request a new async id if it's rescheduled.
+    return undefined;
+  }
+}