Method constructor

src/service/fixed-layer.js:60–99

* @param {!./ampdoc-impl.AmpDoc} ampdoc * @param {!./vsync-impl.Vsync} vsync * @param {number} borderTop * @param {number} paddingTop * @param {boolean} transfer

(ampdoc, vsync, borderTop, paddingTop, transfer)

   * @param {boolean} transfer
   */
  constructor(ampdoc, vsync, borderTop, paddingTop, transfer) {
    /** @const {!./ampdoc-impl.AmpDoc} */
    this.ampdoc = ampdoc;

    /** @private @const */
    this.vsync_ = vsync;

    /** @const @private {number} */
    this.borderTop_ = borderTop;

    /** @private {number} */
    this.paddingTop_ = paddingTop;

    /** @private {number} */
    this.committedPaddingTop_ = paddingTop;

    /** @private @const {boolean} */
    this.transfer_ = transfer && ampdoc.isSingleDoc();

    /** @private {?TransferLayerDef} */
    this.transferLayer_ = null;

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

    /** @const @private {!Array<!ElementDef>} */
    this.elements_ = [];

    /** @const @private {!Pass} */
    this.updatePass_ = new Pass(ampdoc.win, () => this.update());

    /** @private {?function()} */
    this.hiddenObserverUnlistener_ = null;

    /** @private {!Array<string>} */
    this.fixedSelectors_ = [];

    /** @private {!Array<string>} */
    this.stickySelectors_ = [];
  }

  /**
   * Informs FixedLayer that a lightbox was opened.