Method constructor

src/service/resource.js:127–221

* @param {number} id * @param {!AmpElement} element * @param {!./resources-interface.ResourcesInterface} resources

(id, element, resources)

   * @param {!./resources-interface.ResourcesInterface} resources
   */
  constructor(id, element, resources) {
    element[RESOURCE_PROP_] = this;

    /** @private {number} */
    this.id_ = id;

    /** @const {!AmpElement} */
    this.element = element;

    /** @const {string} */
    this.debugid = element.tagName.toLowerCase() + '#' + id;

    /** @const {!Window} */
    this.hostWin = toWin(element.ownerDocument.defaultView);

    /** @const @private {!./resources-interface.ResourcesInterface} */
    this.resources_ = resources;

    /** @const @private {boolean} */
    this.isPlaceholder_ = element.hasAttribute('placeholder');

    /** @private {boolean} */
    this.isBuilding_ = false;

    /** @private {!AmpElement|undefined|null} */
    this.owner_ = undefined;

    /** @private {!ResourceState_Enum} */
    this.state_ = element.isBuilt()
      ? ResourceState_Enum.NOT_LAID_OUT
      : ResourceState_Enum.NOT_BUILT;

    // Race condition: if an element is reparented while building, it'll
    // receive a newly constructed Resource. Make sure this Resource's
    // internal state is also "building".
    if (this.state_ == ResourceState_Enum.NOT_BUILT && element.isBuilding()) {
      this.build();
    }

    /** @private {number} */
    this.priorityOverride_ = -1;

    /** @private {number} */
    this.layoutCount_ = 0;

    /**
     * Used to signal that the current layoutCallback has been aborted by an
     * unlayoutCallback.
     * @private {?AbortController}
     */
    this.abortController_ = null;

    /** @private {*} */
    this.lastLayoutError_ = null;

    /** @private {boolean} */
    this.isFixed_ = false;