vscroll/dist/esm2015/classes/state/cycle.js

Virtual scroll engine

import { Reactive } from '../reactive';
class InnerLoopModel {
  get first() {
    return this.count === 0;
  }
  constructor(total) {
    this.total = total;
    this.isInitial = false;
    this.busy = new Reactive(false);
  }
  done() {
    this.isInitial = false;
    this.count++;
    this.total++;
    this.busy.set(false);
  }
  start() {
    this.busy.set(true);
  }
  dispose() {
    this.busy.dispose();
  }
}
export class WorkflowCycleModel {
  get loopId() {
    return `${this.instanceIndex}-${this.count}-${this.innerLoop.total}`;
  }
  get loopIdNext() {
    return `${this.instanceIndex}-${this.count}-${this.innerLoop.total + 1}`;
  }
  constructor(instanceIndex, cycle) {
    const cycleCount = cycle ? cycle.count : 1;
    const loopCount = cycle ? cycle.innerLoop.count : 0;
    this.instanceIndex = instanceIndex;
    this.innerLoop = new InnerLoopModel(loopCount);
    this.interrupter = null;
    this.busy = new Reactive(false);
    this.end(cycleCount);
  }
  start(isInitial, initiator) {
    this.isInitial = isInitial;
    this.initiator = initiator;
    this.innerLoop.isInitial = isInitial;
    this.innerLoop.count = 0;
    this.interrupter = null;
    this.busy.set(true);
  }
  end(count) {
    this.count = count;
    this.isInitial = false;
    this.busy.set(false);
  }
  dispose(forever) {
    if (forever) {
      // otherwise the value will be persisted during re-instantiation
      this.busy.dispose();
    }
    this.innerLoop.dispose();
  }
}
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