Method view

src/Viewer.js:23–54

* Views content. * @param {Chain} content * @return {Promise} Resolves when completed.

(content)

   * @return {Promise} Resolves when completed.
   */
  async view (content) {
    try {
      // check for invalid settings
      const invalidSettings = this.getSettingsForm().getInvalidFields()
      if (invalidSettings.length > 0) {
        throw new InvalidInputError(
          'Can\'t view content with invalid settings: ' +
          invalidSettings.map(setting => setting.getLabel()).join(', '))
      }

      if (!this.hasView()) {
        // run view as soon as the view is being created
        this._queuedContent = content
        return
      }

      // perform actual view
      content = await this.willView(content)
      await this.performView(content)
      await this.didView(content)

      // clear error
      if (this._error !== null) {
        this._error = null
        this.updateView()
      }
    } catch (error) {
      this._error = error
      this.updateView()
      throw error
    }
  }

  /**
   * Triggered before performing view of given content.