Slideshow.php in Views Slideshow 8.3

Contains \Drupal\views_slideshow\Plugin\views\style\Slideshow.

Namespace

Drupal\views_slideshow\Plugin\views\style

File

src/Plugin/views/style/Slideshow.php

<?php

/**
 * @file
 * Contains \Drupal\views_slideshow\Plugin\views\style\Slideshow.
 */
namespace Drupal\views_slideshow\Plugin\views\style;

use Drupal\Core\Form\FormStateInterface;
use Drupal\views\Plugin\views\style\StylePluginBase;
use Drupal\Core\Url;

/**
 * Style plugin to render each item in a grid cell.
 *
 * @ingroup views_style_plugins
 *
 * @ViewsStyle(
 *   id = "slideshow",
 *   title = @Translation("Slideshow"),
 *   help = @Translation("Display the results as a slideshow."),
 *   theme = "views_view_slideshow",
 *   display_types = {"normal"}
 * )
 */
class Slideshow extends StylePluginBase {

  /**
   * Does the style plugin allows to use style plugins.
   *
   * @var bool
   */
  protected $usesRowPlugin = TRUE;

  /**
   * Does the style plugin support custom css class for the rows.
   *
   * @var bool
   */
  protected $usesRowClass = TRUE;

  /**
   * Does the style plugin support grouping of rows.
   *
   * @var bool
   */
  protected $usesGrouping = FALSE;

  /**
   * Does the style plugin for itself support to add fields to it's output.
   *
   * This option only makes sense on style plugins without row plugins, like
   * for example table.
   *
   * @var bool
   */
  protected $usesFields = TRUE;

  /**
   * {@inheritdoc}
   */
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['row_class_custom'] = array(
      'default' => '',
    );
    $options['row_class_default'] = array(
      'default' => TRUE,
    );
    return array_merge($options, \Drupal::moduleHandler()
      ->invokeAll('views_slideshow_option_definition'));
  }

  /**
   * {@inheritdoc}
   */
  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    parent::buildOptionsForm($form, $form_state);

    // Wrap all the form elements to help style the form.
    $form['views_slideshow_wrapper'] = array(
      '#markup' => '<div id="views-slideshow-form-wrapper">',
    );

    /**
     * Style.
     */
    $form['slideshow_skin_header'] = array(
      '#markup' => '<h2>' . t('Style') . '</h2>',
    );

    // Get a list of all available skins.
    $skin_info = $this
      ->getSkins();
    foreach ($skin_info as $skin => $info) {
      $skins[$skin] = $info['name'];
    }
    asort($skins);

    // Create the drop down box so users can choose an available skin.
    $form['slideshow_skin'] = array(
      '#type' => 'select',
      '#title' => t('Skin'),
      '#options' => $skins,
      '#default_value' => $this->options['slideshow_skin'],
      '#description' => t('Select the skin to use for this display.  Skins allow for easily swappable layouts of things like next/prev links and thumbnails.  Note that not all skins support all widgets, so a combination of skins and widgets may lead to unpredictable results in layout.'),
    );

    /**
     * Slides
     */
    $form['slides_header'] = array(
      '#markup' => '<h2>' . t('Slides') . '</h2>',
    );

    // Get all slideshow types.
    $slideshows = \Drupal::moduleHandler()
      ->invokeAll('views_slideshow_slideshow_info');
    if ($slideshows) {

      // Build our slideshow options for the form.
      $slideshow_options = array();
      foreach ($slideshows as $slideshow_id => $slideshow_info) {
        $slideshow_options[$slideshow_id] = $slideshow_info['name'];
      }
      $form['slideshow_type'] = array(
        '#type' => 'select',
        '#title' => t('Slideshow Type'),
        '#options' => $slideshow_options,
        '#default_value' => $this->options['slideshow_type'],
      );
      $arguments = array(
        &$form,
        &$form_state,
        &$this,
      );
      foreach (\Drupal::moduleHandler()
        ->getImplementations('views_slideshow_slideshow_type_form') as $module) {
        $form[$module] = array(
          '#type' => 'fieldset',
          '#title' => t('!module options', array(
            '!module' => $slideshows[$module]['name'],
          )),
          '#collapsible' => TRUE,
          '#attributes' => array(
            'class' => array(
              $module,
            ),
          ),
          '#states' => array(
            'visible' => array(
              ':input[name="style_options[slideshow_type]"]' => array(
                'value' => $module,
              ),
            ),
          ),
        );
        $function = $module . '_views_slideshow_slideshow_type_form';
        call_user_func_array($function, $arguments);
      }
    }
    else {
      $form['enable_module'] = array(
        '#markup' => t('There is no Views Slideshow plugin enabled. Go to the !modules and enable a Views Slideshow plugin module. For example Views Slideshow Singleframe.', array(
          '!modules' => \Drupal::l(t('Modules Page'), Url::fromRoute('system.modules_list')),
        )),
      );
    }

    /**
     * Widgets
     */
    $form['widgets_header'] = array(
      '#markup' => '<h2>' . t('Widgets') . '</h2>',
    );

    // Loop through all locations so we can add header for each location.
    $location = array(
      'top' => t('Top'),
      'bottom' => t('Bottom'),
    );
    foreach ($location as $location_id => $location_name) {

      // Widget Header
      $form['widgets'][$location_id]['header'] = array(
        '#markup' => '<h3>' . t('!location Widgets', array(
          '!location' => $location_name,
        )) . '</h3>',
      );
    }

    // Get all widgets that are registered.
    // If we have widgets then build it's form fields.
    $widgets = \Drupal::moduleHandler()
      ->invokeAll('views_slideshow_widget_info');
    if (!empty($widgets)) {

      // Build our weight values by number of widgets
      $weights = array();
      for ($i = 1; $i <= count($widgets); $i++) {
        $weights[$i] = $i;
      }

      // Loop through our widgets and locations to build our form values for
      // each widget.
      foreach ($widgets as $widget_id => $widget_info) {
        foreach ($location as $location_id => $location_name) {
          $widget_dependency = 'style_options[widgets][' . $location_id . '][' . $widget_id . ']';

          // Determine if a widget is compatible with a slideshow.
          $compatible_slideshows = array();
          foreach ($slideshows as $slideshow_id => $slideshow_info) {
            $is_compatible = 1;

            // Check if every required accept value in the widget has a
            // corresponding calls value in the slideshow.
            foreach ($widget_info['accepts'] as $accept_key => $accept_value) {
              if (is_array($accept_value) && !empty($accept_value['required']) && !in_array($accept_key, $slideshow_info['calls'])) {
                $is_compatible = 0;
                break;
              }
            }

            // No need to go through this if it's not compatible.
            if ($is_compatible) {

              // Check if every required calls value in the widget has a
              // corresponding accepts call.
              foreach ($widget_info['calls'] as $calls_key => $calls_value) {
                if (is_array($calls_value) && !empty($calls_value['required']) && !in_array($calls_key, $slideshow_info['accepts'])) {
                  $is_compatible = 0;
                  break;
                }
              }
            }

            // If it passed all those tests then they are compatible.
            if ($is_compatible) {
              $compatible_slideshows[] = $slideshow_id;
            }
          }

          // Use Widget Checkbox
          $form['widgets'][$location_id][$widget_id]['enable'] = array(
            '#type' => 'checkbox',
            '#title' => t($widget_info['name']),
            '#default_value' => $this->options['widgets'][$location_id][$widget_id]['enable'],
            '#description' => t('Should !name be rendered at the !location of the slides.', array(
              '!name' => $widget_info['name'],
              '!location' => $location_name,
            )),
          );
          $form['widgets'][$location_id][$widget_id]['enable']['#dependency']['edit-style-options-slideshow-type'] = !empty($compatible_slideshows) ? $compatible_slideshows : array(
            'none',
          );

          // Need to wrap this so it indents correctly.
          $form['widgets'][$location_id][$widget_id]['wrapper'] = array(
            '#markup' => '<div class="vs-dependent">',
          );

          // Widget weight
          // We check to see if the default value is greater than the number of
          // widgets just in case a widget has been removed and the form hasn't
          // been saved again.
          $weight = isset($this->options['widgets'][$location_id][$widget_id]['weight']) ? $this->options['widgets'][$location_id][$widget_id]['weight'] : 0;
          if ($weight > count($widgets)) {
            $weight = count($widgets);
          }
          $form['widgets'][$location_id][$widget_id]['weight'] = array(
            '#type' => 'select',
            '#title' => t('Weight of the !name', array(
              '!name' => $widget_info['name'],
            )),
            '#default_value' => $weight,
            '#options' => $weights,
            '#description' => t('Determines in what order the !name appears.  A lower weight will cause the !name to be above higher weight items.', array(
              '!name' => $widget_info['name'],
            )),
            '#prefix' => '<div class="vs-dependent">',
            '#suffix' => '</div>',
            '#states' => array(
              'visible' => array(
                ':input[name="style_options[widgets][' . $location_id . '][' . $widget_id . '][enable]"]' => array(
                  'checked' => TRUE,
                ),
              ),
            ),
          );

          // Add all the widget settings.
          if (function_exists($widget_id . '_views_slideshow_widget_form_options')) {
            $arguments = array(
              &$form['widgets'][$location_id][$widget_id],
              &$form_state,
              &$this,
              $this->options['widgets'][$location_id][$widget_id],
              $widget_dependency,
            );
            call_user_func_array($widget_id . '_views_slideshow_widget_form_options', $arguments);
          }
          $form['widgets'][$location_id][$widget_id]['wrapper_close'] = array(
            '#markup' => '</div>',
          );
        }
      }
    }
    $form['views_slideshow_wrapper_close'] = array(
      '#markup' => '</div>',
    );
    $form['#attached']['library'] = array(
      'views_slideshow/form',
    );
  }

  /**
   * {@inheritdoc}
   */
  public function validateOptionsForm(&$form, FormStateInterface $form_state) {
    $arguments = array(
      &$form,
      &$form_state,
      &$this,
    );

    // Call all modules that use hook_views_slideshow_options_form_validate
    foreach (\Drupal::moduleHandler()
      ->getImplementations('views_slideshow_options_form_validate') as $module) {
      $function = $module . '_views_slideshow_options_form_validate';
      call_user_func_array($function, $arguments);
    }
  }

  /**
   * {@inheritdoc}
   */
  public function submitOptionsForm(&$form, FormStateInterface $form_state) {
    $arguments = array(
      $form,
      &$form_state,
    );

    // Call all modules that use hook_views_slideshow_options_form_submit
    foreach (\Drupal::moduleHandler()
      ->getImplementations('views_slideshow_options_form_submit') as $module) {
      $function = $module . '_views_slideshow_options_form_submit';
      call_user_func_array($function, $arguments);
    }

    // In addition to the skin, we also pre-save the definition that
    // correspond to it.  That lets us avoid a hook lookup on every page.
    $skins = $this
      ->getSkins();
    $form_state
      ->setValue(array(
      'style_options',
      'skin_info',
    ), $skins[$form_state
      ->getValue(array(
      'style_options',
      'slideshow_skin',
    ))]);
  }

  /**
   * Retrieve a list of all available skins in the system.
   */
  public function getSkins() {
    static $skins;
    if (empty($skins)) {
      $skins = array();

      // Call all modules that use hook_views_slideshow_skin_info.
      foreach (\Drupal::moduleHandler()
        ->getImplementations('views_slideshow_skin_info') as $module) {
        $skin_items = call_user_func($module . '_views_slideshow_skin_info');
        if (isset($skin_items) && is_array($skin_items)) {
          foreach (array_keys($skin_items) as $skin) {

            // Ensure that the definition is complete, so we don't need lots
            // of error checking later.
            $skin_items[$skin] += array(
              'class' => 'default',
              'name' => t('Untitled skin'),
              'module' => $module,
              'libraries' => array(),
            );
          }
          $skins = array_merge($skins, $skin_items);
        }
      }
    }
    return $skins;
  }

}

Classes

Name	Description
Slideshow	Style plugin to render each item in a grid cell.