vscroll/dist/esm2015/classes/item.js

Virtual scroll engine

export class Item {
  get uid() {
    return this.container.uid;
  }
  set uid(value) {
    this.container.uid = value;
  }
  get $index() {
    return this.container.$index;
  }
  set $index(value) {
    this.container.$index = value;
  }
  get data() {
    return this.container.data;
  }
  set data(value) {
    this.container.data = value;
  }
  get element() {
    return this.container.element;
  }
  set element(value) {
    this.container.element = value;
  }
  constructor($index, data, routines) {
    this.container = {
      uid: Item.nextUid++,
      $index,
      data
    };
    this.nodeId = String($index);
    this.routines = routines;
    this.invisible = true;
    this.toRemove = false;
    this.toInsert = false;
  }
  dispose() {
    delete this.container.element;
  }
  setSize(preSize = 0) {
    this.preSize = preSize;
    if (this.element) {
      this.size = this.routines.getSize(this.element);
    }
  }
  makeVisible() {
    this.routines.makeElementVisible(this.element);
    this.invisible = false;
  }
  hide() {
    if (this.element) {
      this.routines.hideElement(this.element);
    }
  }
  scrollTo(argument) {
    if (this.element) {
      this.routines.scrollTo(this.element, argument);
    }
  }
  updateIndex(index) {
    this.$index = index;
    this.nodeId = String(index);
  }
  get() {
    return this.container;
  }
}
Item.nextUid = 1;
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