Method getViewerOrigin

src/service/viewer-impl.js:613–636

@override

()

  /** @override */
  getViewerOrigin() {
    if (!this.viewerOrigin_) {
      let origin;
      if (!this.isEmbedded()) {
        // Viewer is only determined for iframed documents at this time.
        origin = '';
      } else if (
        this.win.location.ancestorOrigins &&
        this.win.location.ancestorOrigins.length > 0
      ) {
        origin = this.win.location.ancestorOrigins[0];
      }
      this.viewerOrigin_ =
        origin !== undefined
          ? Promise.resolve(origin)
          : Services.timerFor(this.win)
              .timeoutPromise(
                VIEWER_ORIGIN_TIMEOUT_,
                this.messagingReadyPromise_
              )
              .catch(() => '');
    }
    return /** @type {!Promise<string>} */ (this.viewerOrigin_);
  }

  /**
   * @param {string} urlString