diff core/modules/views_ui/src/ViewUI.php @ 0:c75dbcec494b

Initial commit from drush-created site

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/views_ui/src/ViewUI.php	Thu Jul 05 14:24:15 2018 +0000
@@ -0,0 +1,1354 @@
+<?php
+
+namespace Drupal\views_ui;
+
+use Drupal\Component\Utility\Html;
+use Drupal\Component\Utility\Timer;
+use Drupal\Core\EventSubscriber\AjaxResponseSubscriber;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\views\Views;
+use Drupal\Core\Entity\EntityStorageInterface;
+use Drupal\views\ViewExecutable;
+use Drupal\Core\Database\Database;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\views\Plugin\views\query\Sql;
+use Drupal\views\Entity\View;
+use Drupal\views\ViewEntityInterface;
+use Symfony\Cmf\Component\Routing\RouteObjectInterface;
+use Symfony\Component\HttpFoundation\ParameterBag;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Stores UI related temporary settings.
+ */
+class ViewUI implements ViewEntityInterface {
+
+  /**
+   * Indicates if a view is currently being edited.
+   *
+   * @var bool
+   */
+  public $editing = FALSE;
+
+  /**
+   * Stores an array of displays that have been changed.
+   *
+   * @var array
+   */
+  public $changed_display;
+
+  /**
+   * How long the view takes to render in microseconds.
+   *
+   * @var float
+   */
+  public $render_time;
+
+  /**
+   * If this view is locked for editing.
+   *
+   * If this view is locked it will contain the result of
+   * \Drupal\Core\TempStore\SharedTempStore::getMetadata(). Which can be a stdClass or
+   * NULL.
+   *
+   * @var stdClass
+   */
+  public $lock;
+
+  /**
+   * If this view has been changed.
+   *
+   * @var bool
+   */
+  public $changed;
+
+  /**
+   * Stores options temporarily while editing.
+   *
+   * @var array
+   */
+  public $temporary_options;
+
+  /**
+   * Stores a stack of UI forms to display.
+   *
+   * @var array
+   */
+  public $stack;
+
+  /**
+   * Is the view run in a context of the preview in the admin interface.
+   *
+   * @var bool
+   */
+  public $live_preview;
+
+  public $renderPreview = FALSE;
+
+  /**
+   * The View storage object.
+   *
+   * @var \Drupal\views\ViewEntityInterface
+   */
+  protected $storage;
+
+  /**
+   * Stores a list of database queries run beside the main one from views.
+   *
+   * @var array
+   *
+   * @see \Drupal\Core\Database\Log
+   */
+  protected $additionalQueries;
+
+  /**
+   * Contains an array of form keys and their respective classes.
+   *
+   * @var array
+   */
+  public static $forms = [
+    'add-handler' => '\Drupal\views_ui\Form\Ajax\AddItem',
+    'analyze' => '\Drupal\views_ui\Form\Ajax\Analyze',
+    'handler' => '\Drupal\views_ui\Form\Ajax\ConfigHandler',
+    'handler-extra' => '\Drupal\views_ui\Form\Ajax\ConfigHandlerExtra',
+    'handler-group' => '\Drupal\views_ui\Form\Ajax\ConfigHandlerGroup',
+    'display' => '\Drupal\views_ui\Form\Ajax\Display',
+    'edit-details' => '\Drupal\views_ui\Form\Ajax\EditDetails',
+    'rearrange' => '\Drupal\views_ui\Form\Ajax\Rearrange',
+    'rearrange-filter' => '\Drupal\views_ui\Form\Ajax\RearrangeFilter',
+    'reorder-displays' => '\Drupal\views_ui\Form\Ajax\ReorderDisplays',
+  ];
+
+  /**
+   * Whether the config is being created, updated or deleted through the
+   * import process.
+   *
+   * @var bool
+   */
+  private $isSyncing = FALSE;
+
+  /**
+   * Whether the config is being deleted through the uninstall process.
+   *
+   * @var bool
+   */
+  private $isUninstalling = FALSE;
+
+  /**
+   * Constructs a View UI object.
+   *
+   * @param \Drupal\views\ViewEntityInterface $storage
+   *   The View storage object to wrap.
+   */
+  public function __construct(ViewEntityInterface $storage) {
+    $this->entityType = 'view';
+    $this->storage = $storage;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function get($property_name, $langcode = NULL) {
+    if (property_exists($this->storage, $property_name)) {
+      return $this->storage->get($property_name, $langcode);
+    }
+
+    return isset($this->{$property_name}) ? $this->{$property_name} : NULL;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setStatus($status) {
+    return $this->storage->setStatus($status);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function set($property_name, $value, $notify = TRUE) {
+    if (property_exists($this->storage, $property_name)) {
+      $this->storage->set($property_name, $value);
+    }
+    else {
+      $this->{$property_name} = $value;
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setSyncing($syncing) {
+    $this->isSyncing = $syncing;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setUninstalling($isUninstalling) {
+    $this->isUninstalling = $isUninstalling;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isSyncing() {
+    return $this->isSyncing;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isUninstalling() {
+    return $this->isUninstalling;
+  }
+
+  /**
+   * Basic submit handler applicable to all 'standard' forms.
+   *
+   * This submit handler determines whether the user wants the submitted changes
+   * to apply to the default display or to the current display, and dispatches
+   * control appropriately.
+   */
+  public function standardSubmit($form, FormStateInterface $form_state) {
+    // Determine whether the values the user entered are intended to apply to
+    // the current display or the default display.
+
+    list($was_defaulted, $is_defaulted, $revert) = $this->getOverrideValues($form, $form_state);
+
+    // Based on the user's choice in the display dropdown, determine which display
+    // these changes apply to.
+    $display_id = $form_state->get('display_id');
+    if ($revert) {
+      // If it's revert just change the override and return.
+      $display = &$this->getExecutable()->displayHandlers->get($display_id);
+      $display->optionsOverride($form, $form_state);
+
+      // Don't execute the normal submit handling but still store the changed view into cache.
+      $this->cacheSet();
+      return;
+    }
+    elseif ($was_defaulted === $is_defaulted) {
+      // We're not changing which display these form values apply to.
+      // Run the regular submit handler for this form.
+    }
+    elseif ($was_defaulted && !$is_defaulted) {
+      // We were using the default display's values, but we're now overriding
+      // the default display and saving values specific to this display.
+      $display = &$this->getExecutable()->displayHandlers->get($display_id);
+      // optionsOverride toggles the override of this section.
+      $display->optionsOverride($form, $form_state);
+      $display->submitOptionsForm($form, $form_state);
+    }
+    elseif (!$was_defaulted && $is_defaulted) {
+      // We used to have an override for this display, but the user now wants
+      // to go back to the default display.
+      // Overwrite the default display with the current form values, and make
+      // the current display use the new default values.
+      $display = &$this->getExecutable()->displayHandlers->get($display_id);
+      // optionsOverride toggles the override of this section.
+      $display->optionsOverride($form, $form_state);
+      $display->submitOptionsForm($form, $form_state);
+    }
+
+    $submit_handler = [$form_state->getFormObject(), 'submitForm'];
+    call_user_func_array($submit_handler, [&$form, $form_state]);
+  }
+
+  /**
+   * Submit handler for cancel button
+   */
+  public function standardCancel($form, FormStateInterface $form_state) {
+    if (!empty($this->changed) && isset($this->form_cache)) {
+      unset($this->form_cache);
+      $this->cacheSet();
+    }
+
+    $form_state->setRedirectUrl($this->urlInfo('edit-form'));
+  }
+
+  /**
+   * Provide a standard set of Apply/Cancel/OK buttons for the forms. Also provide
+   * a hidden op operator because the forms plugin doesn't seem to properly
+   * provide which button was clicked.
+   *
+   * TODO: Is the hidden op operator still here somewhere, or is that part of the
+   * docblock outdated?
+   */
+  public function getStandardButtons(&$form, FormStateInterface $form_state, $form_id, $name = NULL) {
+    $form['actions'] = [
+      '#type' => 'actions',
+    ];
+
+    if (empty($name)) {
+      $name = t('Apply');
+      if (!empty($this->stack) && count($this->stack) > 1) {
+        $name = t('Apply and continue');
+      }
+      $names = [t('Apply'), t('Apply and continue')];
+    }
+
+    // Forms that are purely informational set an ok_button flag, so we know not
+    // to create an "Apply" button for them.
+    if (!$form_state->get('ok_button')) {
+      $form['actions']['submit'] = [
+        '#type' => 'submit',
+        '#value' => $name,
+        '#id' => 'edit-submit-' . Html::getUniqueId($form_id),
+        // The regular submit handler ($form_id . '_submit') does not apply if
+        // we're updating the default display. It does apply if we're updating
+        // the current display. Since we have no way of knowing at this point
+        // which display the user wants to update, views_ui_standard_submit will
+        // take care of running the regular submit handler as appropriate.
+        '#submit' => [[$this, 'standardSubmit']],
+        '#button_type' => 'primary',
+      ];
+      // Form API button click detection requires the button's #value to be the
+      // same between the form build of the initial page request, and the
+      // initial form build of the request processing the form submission.
+      // Ideally, the button's #value shouldn't change until the form rebuild
+      // step. However, \Drupal\views_ui\Form\Ajax\ViewsFormBase::getForm()
+      // implements a different multistep form workflow than the Form API does,
+      // and adjusts $view->stack prior to form processing, so we compensate by
+      // extending button click detection code to support any of the possible
+      // button labels.
+      if (isset($names)) {
+        $form['actions']['submit']['#values'] = $names;
+        $form['actions']['submit']['#process'] = array_merge(['views_ui_form_button_was_clicked'], \Drupal::service('element_info')->getInfoProperty($form['actions']['submit']['#type'], '#process', []));
+      }
+      // If a validation handler exists for the form, assign it to this button.
+      $form['actions']['submit']['#validate'][] = [$form_state->getFormObject(), 'validateForm'];
+    }
+
+    // Create a "Cancel" button. For purely informational forms, label it "OK".
+    $cancel_submit = function_exists($form_id . '_cancel') ? $form_id . '_cancel' : [$this, 'standardCancel'];
+    $form['actions']['cancel'] = [
+      '#type' => 'submit',
+      '#value' => !$form_state->get('ok_button') ? t('Cancel') : t('Ok'),
+      '#submit' => [$cancel_submit],
+      '#validate' => [],
+      '#limit_validation_errors' => [],
+    ];
+
+    // Compatibility, to be removed later: // TODO: When is "later"?
+    // We used to set these items on the form, but now we want them on the $form_state:
+    if (isset($form['#title'])) {
+      $form_state->set('title', $form['#title']);
+    }
+    if (isset($form['#section'])) {
+      $form_state->set('#section', $form['#section']);
+    }
+    // Finally, we never want these cached -- our object cache does that for us.
+    $form['#no_cache'] = TRUE;
+  }
+
+  /**
+   * Return the was_defaulted, is_defaulted and revert state of a form.
+   */
+  public function getOverrideValues($form, FormStateInterface $form_state) {
+    // Make sure the dropdown exists in the first place.
+    if ($form_state->hasValue(['override', 'dropdown'])) {
+      // #default_value is used to determine whether it was the default value or not.
+      // So the available options are: $display, 'default' and 'default_revert', not 'defaults'.
+      $was_defaulted = ($form['override']['dropdown']['#default_value'] === 'defaults');
+      $dropdown = $form_state->getValue(['override', 'dropdown']);
+      $is_defaulted = ($dropdown === 'default');
+      $revert = ($dropdown === 'default_revert');
+
+      if ($was_defaulted !== $is_defaulted && isset($form['#section'])) {
+        // We're changing which display these values apply to.
+        // Update the #section so it knows what to mark changed.
+        $form['#section'] = str_replace('default-', $form_state->get('display_id') . '-', $form['#section']);
+      }
+    }
+    else {
+      // The user didn't get the dropdown for overriding the default display.
+      $was_defaulted = FALSE;
+      $is_defaulted = FALSE;
+      $revert = FALSE;
+    }
+
+    return [$was_defaulted, $is_defaulted, $revert];
+  }
+
+  /**
+   * Add another form to the stack; clicking 'apply' will go to this form
+   * rather than closing the ajax popup.
+   */
+  public function addFormToStack($key, $display_id, $type, $id = NULL, $top = FALSE, $rebuild_keys = FALSE) {
+    // Reset the cache of IDs. Drupal rather aggressively prevents ID
+    // duplication but this causes it to remember IDs that are no longer even
+    // being used.
+    Html::resetSeenIds();
+
+    if (empty($this->stack)) {
+      $this->stack = [];
+    }
+
+    $stack = [implode('-', array_filter([$key, $this->id(), $display_id, $type, $id])), $key, $display_id, $type, $id];
+    // If we're being asked to add this form to the bottom of the stack, no
+    // special logic is required. Our work is equally easy if we were asked to add
+    // to the top of the stack, but there's nothing in it yet.
+    if (!$top || empty($this->stack)) {
+      $this->stack[] = $stack;
+    }
+    // If we're adding to the top of an existing stack, we have to maintain the
+    // existing integer keys, so they can be used for the "2 of 3" progress
+    // indicator (which will now read "2 of 4").
+    else {
+      $keys = array_keys($this->stack);
+      $first = current($keys);
+      $last = end($keys);
+      for ($i = $last; $i >= $first; $i--) {
+        if (!isset($this->stack[$i])) {
+          continue;
+        }
+        // Move form number $i to the next position in the stack.
+        $this->stack[$i + 1] = $this->stack[$i];
+        unset($this->stack[$i]);
+      }
+      // Now that the previously $first slot is free, move the new form into it.
+      $this->stack[$first] = $stack;
+      ksort($this->stack);
+
+      // Start the keys from 0 again, if requested.
+      if ($rebuild_keys) {
+        $this->stack = array_values($this->stack);
+      }
+    }
+  }
+
+  /**
+   * Submit handler for adding new item(s) to a view.
+   */
+  public function submitItemAdd($form, FormStateInterface $form_state) {
+    $type = $form_state->get('type');
+    $types = ViewExecutable::getHandlerTypes();
+    $section = $types[$type]['plural'];
+    $display_id = $form_state->get('display_id');
+
+    // Handle the override select.
+    list($was_defaulted, $is_defaulted) = $this->getOverrideValues($form, $form_state);
+    if ($was_defaulted && !$is_defaulted) {
+      // We were using the default display's values, but we're now overriding
+      // the default display and saving values specific to this display.
+      $display = &$this->getExecutable()->displayHandlers->get($display_id);
+      // setOverride toggles the override of this section.
+      $display->setOverride($section);
+    }
+    elseif (!$was_defaulted && $is_defaulted) {
+      // We used to have an override for this display, but the user now wants
+      // to go back to the default display.
+      // Overwrite the default display with the current form values, and make
+      // the current display use the new default values.
+      $display = &$this->getExecutable()->displayHandlers->get($display_id);
+      // optionsOverride toggles the override of this section.
+      $display->setOverride($section);
+    }
+
+    if (!$form_state->isValueEmpty('name') && is_array($form_state->getValue('name'))) {
+      // Loop through each of the items that were checked and add them to the view.
+      foreach (array_keys(array_filter($form_state->getValue('name'))) as $field) {
+        list($table, $field) = explode('.', $field, 2);
+
+        if ($cut = strpos($field, '$')) {
+          $field = substr($field, 0, $cut);
+        }
+        $id = $this->getExecutable()->addHandler($display_id, $type, $table, $field);
+
+        // check to see if we have group by settings
+        $key = $type;
+        // Footer,header and empty text have a different internal handler type(area).
+        if (isset($types[$type]['type'])) {
+          $key = $types[$type]['type'];
+        }
+        $item = [
+          'table' => $table,
+          'field' => $field,
+        ];
+        $handler = Views::handlerManager($key)->getHandler($item);
+        if ($this->getExecutable()->displayHandlers->get('default')->useGroupBy() && $handler->usesGroupBy()) {
+          $this->addFormToStack('handler-group', $display_id, $type, $id);
+        }
+
+        // check to see if this type has settings, if so add the settings form first
+        if ($handler && $handler->hasExtraOptions()) {
+          $this->addFormToStack('handler-extra', $display_id, $type, $id);
+        }
+        // Then add the form to the stack
+        $this->addFormToStack('handler', $display_id, $type, $id);
+      }
+    }
+
+    if (isset($this->form_cache)) {
+      unset($this->form_cache);
+    }
+
+    // Store in cache
+    $this->cacheSet();
+  }
+
+  /**
+   * Set up query capturing.
+   *
+   * \Drupal\Core\Database\Database stores the queries that it runs, if logging
+   * is enabled.
+   *
+   * @see ViewUI::endQueryCapture()
+   */
+  public function startQueryCapture() {
+    Database::startLog('views');
+  }
+
+  /**
+   * Add the list of queries run during render to buildinfo.
+   *
+   * @see ViewUI::startQueryCapture()
+   */
+  public function endQueryCapture() {
+    $queries = Database::getLog('views');
+
+    $this->additionalQueries = $queries;
+  }
+
+  public function renderPreview($display_id, $args = []) {
+    // Save the current path so it can be restored before returning from this function.
+    $request_stack = \Drupal::requestStack();
+    $current_request = $request_stack->getCurrentRequest();
+    $executable = $this->getExecutable();
+
+    // Determine where the query and performance statistics should be output.
+    $config = \Drupal::config('views.settings');
+    $show_query = $config->get('ui.show.sql_query.enabled');
+    $show_info = $config->get('ui.show.preview_information');
+    $show_location = $config->get('ui.show.sql_query.where');
+
+    $show_stats = $config->get('ui.show.performance_statistics');
+    if ($show_stats) {
+      $show_stats = $config->get('ui.show.sql_query.where');
+    }
+
+    $combined = $show_query && $show_stats;
+
+    $rows = ['query' => [], 'statistics' => []];
+
+    $errors = $executable->validate();
+    $executable->destroy();
+    if (empty($errors)) {
+      $this->ajax = TRUE;
+      $executable->live_preview = TRUE;
+
+      // AJAX happens via HTTP POST but everything expects exposed data to
+      // be in GET. Copy stuff but remove ajax-framework specific keys.
+      // If we're clicking on links in a preview, though, we could actually
+      // have some input in the query parameters, so we merge request() and
+      // query() to ensure we get it all.
+      $exposed_input = array_merge(\Drupal::request()->request->all(), \Drupal::request()->query->all());
+      foreach (['view_name', 'view_display_id', 'view_args', 'view_path', 'view_dom_id', 'pager_element', 'view_base_path', AjaxResponseSubscriber::AJAX_REQUEST_PARAMETER, 'ajax_page_state', 'form_id', 'form_build_id', 'form_token'] as $key) {
+        if (isset($exposed_input[$key])) {
+          unset($exposed_input[$key]);
+        }
+      }
+      $executable->setExposedInput($exposed_input);
+
+      if (!$executable->setDisplay($display_id)) {
+        return [
+          '#markup' => t('Invalid display id @display', ['@display' => $display_id]),
+        ];
+      }
+
+      $executable->setArguments($args);
+
+      // Store the current view URL for later use:
+      if ($executable->hasUrl() && $executable->display_handler->getOption('path')) {
+        $path = $executable->getUrl();
+      }
+
+      // Make view links come back to preview.
+
+      // Also override the current path so we get the pager, and make sure the
+      // Request object gets all of the proper values from $_SERVER.
+      $request = Request::createFromGlobals();
+      $request->attributes->set(RouteObjectInterface::ROUTE_NAME, 'entity.view.preview_form');
+      $request->attributes->set(RouteObjectInterface::ROUTE_OBJECT, \Drupal::service('router.route_provider')->getRouteByName('entity.view.preview_form'));
+      $request->attributes->set('view', $this->storage);
+      $request->attributes->set('display_id', $display_id);
+      $raw_parameters = new ParameterBag();
+      $raw_parameters->set('view', $this->id());
+      $raw_parameters->set('display_id', $display_id);
+      $request->attributes->set('_raw_variables', $raw_parameters);
+
+      foreach ($args as $key => $arg) {
+        $request->attributes->set('arg_' . $key, $arg);
+      }
+      $request_stack->push($request);
+
+      // Suppress contextual links of entities within the result set during a
+      // Preview.
+      // @todo We'll want to add contextual links specific to editing the View, so
+      //   the suppression may need to be moved deeper into the Preview pipeline.
+      views_ui_contextual_links_suppress_push();
+
+      $show_additional_queries = $config->get('ui.show.additional_queries');
+
+      Timer::start('entity.view.preview_form');
+
+      if ($show_additional_queries) {
+        $this->startQueryCapture();
+      }
+
+      // Execute/get the view preview.
+      $preview = $executable->preview($display_id, $args);
+
+      if ($show_additional_queries) {
+        $this->endQueryCapture();
+      }
+
+      $this->render_time = Timer::stop('entity.view.preview_form')['time'];
+
+      views_ui_contextual_links_suppress_pop();
+
+      // Prepare the query information and statistics to show either above or
+      // below the view preview.
+      // Initialise the empty rows arrays so we can safely merge them later.
+      $rows['query'] = [];
+      $rows['statistics'] = [];
+      if ($show_info || $show_query || $show_stats) {
+        // Get information from the preview for display.
+        if (!empty($executable->build_info['query'])) {
+          if ($show_query) {
+            $query_string = $executable->build_info['query'];
+            // Only the sql default class has a method getArguments.
+            $quoted = [];
+
+            if ($executable->query instanceof Sql) {
+              $quoted = $query_string->getArguments();
+              $connection = Database::getConnection();
+              foreach ($quoted as $key => $val) {
+                if (is_array($val)) {
+                  $quoted[$key] = implode(', ', array_map([$connection, 'quote'], $val));
+                }
+                else {
+                  $quoted[$key] = $connection->quote($val);
+                }
+              }
+            }
+            $rows['query'][] = [
+              [
+                'data' => [
+                  '#type' => 'inline_template',
+                  '#template' => "<strong>{% trans 'Query' %}</strong>",
+                ],
+              ],
+              [
+                'data' => [
+                  '#type' => 'inline_template',
+                  '#template' => '<pre>{{ query }}</pre>',
+                  '#context' => ['query' => strtr($query_string, $quoted)],
+                ],
+              ],
+            ];
+            if (!empty($this->additionalQueries)) {
+              $queries[] = [
+                '#prefix' => '<strong>',
+                '#markup' => t('These queries were run during view rendering:'),
+                '#suffix' => '</strong>',
+              ];
+              foreach ($this->additionalQueries as $query) {
+                $query_string = strtr($query['query'], $query['args']);
+                $queries[] = [
+                  '#prefix' => "\n",
+                  '#markup' => t('[@time ms] @query', ['@time' => round($query['time'] * 100000, 1) / 100000.0, '@query' => $query_string]),
+                ];
+              }
+
+              $rows['query'][] = [
+                [
+                  'data' => [
+                    '#type' => 'inline_template',
+                    '#template' => "<strong>{% trans 'Other queries' %}</strong>",
+                  ],
+                ],
+                [
+                  'data' => [
+                    '#prefix' => '<pre>',
+                     'queries' => $queries,
+                     '#suffix' => '</pre>',
+                    ],
+                ],
+              ];
+            }
+          }
+          if ($show_info) {
+            $rows['query'][] = [
+              [
+                'data' => [
+                  '#type' => 'inline_template',
+                  '#template' => "<strong>{% trans 'Title' %}</strong>",
+                ],
+              ],
+              [
+                'data' => [
+                  '#markup' => $executable->getTitle(),
+                ],
+              ],
+            ];
+            if (isset($path)) {
+              // @todo Views should expect and store a leading /. See:
+              //   https://www.drupal.org/node/2423913
+              $path = \Drupal::l($path->toString(), $path);
+            }
+            else {
+              $path = t('This display has no path.');
+            }
+            $rows['query'][] = [
+              [
+                'data' => [
+                  '#prefix' => '<strong>',
+                  '#markup' => t('Path'),
+                  '#suffix' => '</strong>',
+                ],
+              ],
+              [
+                'data' => [
+                  '#markup' => $path,
+                ],
+              ]
+            ];
+          }
+          if ($show_stats) {
+            $rows['statistics'][] = [
+              [
+                'data' => [
+                  '#type' => 'inline_template',
+                  '#template' => "<strong>{% trans 'Query build time' %}</strong>",
+                ],
+              ],
+              t('@time ms', ['@time' => intval($executable->build_time * 100000) / 100]),
+            ];
+
+            $rows['statistics'][] = [
+              [
+                'data' => [
+                  '#type' => 'inline_template',
+                  '#template' => "<strong>{% trans 'Query execute time' %}</strong>",
+                ],
+              ],
+              t('@time ms', ['@time' => intval($executable->execute_time * 100000) / 100]),
+            ];
+
+            $rows['statistics'][] = [
+              [
+                'data' => [
+                  '#type' => 'inline_template',
+                  '#template' => "<strong>{% trans 'View render time' %}</strong>",
+                ],
+              ],
+              t('@time ms', ['@time' => intval($this->render_time * 100) / 100]),
+            ];
+          }
+          \Drupal::moduleHandler()->alter('views_preview_info', $rows, $executable);
+        }
+        else {
+          // No query was run. Display that information in place of either the
+          // query or the performance statistics, whichever comes first.
+          if ($combined || ($show_location === 'above')) {
+            $rows['query'][] = [
+              [
+                'data' => [
+                  '#prefix' => '<strong>',
+                  '#markup' => t('Query'),
+                  '#suffix' => '</strong>',
+                ],
+              ],
+              [
+                'data' => [
+                  '#markup' => t('No query was run'),
+                ],
+              ],
+            ];
+          }
+          else {
+            $rows['statistics'][] = [
+              [
+                'data' => [
+                  '#prefix' => '<strong>',
+                  '#markup' => t('Query'),
+                  '#suffix' => '</strong>',
+                ],
+              ],
+              [
+                'data' => [
+                  '#markup' => t('No query was run'),
+                ],
+              ],
+            ];
+          }
+        }
+      }
+    }
+    else {
+      foreach ($errors as $display_errors) {
+        foreach ($display_errors as $error) {
+          drupal_set_message($error, 'error');
+        }
+      }
+      $preview = ['#markup' => t('Unable to preview due to validation errors.')];
+    }
+
+    // Assemble the preview, the query info, and the query statistics in the
+    // requested order.
+    $table = [
+      '#type' => 'table',
+      '#prefix' => '<div class="views-query-info">',
+      '#suffix' => '</div>',
+      '#rows' => array_merge($rows['query'], $rows['statistics']),
+    ];
+
+    if ($show_location == 'above') {
+      $output = [
+        'table' => $table,
+        'preview' => $preview,
+      ];
+    }
+    else {
+      $output = [
+        'preview' => $preview,
+        'table' => $table,
+      ];
+    }
+
+    // Ensure that we just remove an additional request we pushed earlier.
+    // This could happen if $errors was not empty.
+    if ($request_stack->getCurrentRequest() != $current_request) {
+      $request_stack->pop();
+    }
+    return $output;
+  }
+
+  /**
+   * Get the user's current progress through the form stack.
+   *
+   * @return
+   *   FALSE if the user is not currently in a multiple-form stack. Otherwise,
+   *   an associative array with the following keys:
+   *   - current: The number of the current form on the stack.
+   *   - total: The total number of forms originally on the stack.
+   */
+  public function getFormProgress() {
+    $progress = FALSE;
+    if (!empty($this->stack)) {
+      // The forms on the stack have integer keys that don't change as the forms
+      // are completed, so we can see which ones are still left.
+      $keys = array_keys($this->stack);
+      // Add 1 to the array keys for the benefit of humans, who start counting
+      // from 1 and not 0.
+      $current = reset($keys) + 1;
+      $total = end($keys) + 1;
+      if ($total > 1) {
+        $progress = [];
+        $progress['current'] = $current;
+        $progress['total'] = $total;
+      }
+    }
+    return $progress;
+  }
+
+  /**
+   * Sets a cached view object in the shared tempstore.
+   */
+  public function cacheSet() {
+    if ($this->isLocked()) {
+      drupal_set_message(t('Changes cannot be made to a locked view.'), 'error');
+      return;
+    }
+
+    // Let any future object know that this view has changed.
+    $this->changed = TRUE;
+
+    $executable = $this->getExecutable();
+    if (isset($executable->current_display)) {
+      // Add the knowledge of the changed display, too.
+      $this->changed_display[$executable->current_display] = TRUE;
+      $executable->current_display = NULL;
+    }
+
+    // Unset handlers. We don't want to write these into the cache.
+    $executable->display_handler = NULL;
+    $executable->default_display = NULL;
+    $executable->query = NULL;
+    $executable->displayHandlers = NULL;
+    \Drupal::service('tempstore.shared')->get('views')->set($this->id(), $this);
+  }
+
+  /**
+   * Returns whether the current view is locked.
+   *
+   * @return bool
+   *   TRUE if the view is locked, FALSE otherwise.
+   */
+  public function isLocked() {
+    return is_object($this->lock) && ($this->lock->owner != \Drupal::currentUser()->id());
+  }
+
+  /**
+   * Passes through all unknown calls onto the storage object.
+   */
+  public function __call($method, $args) {
+    return call_user_func_array([$this->storage, $method], $args);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function &getDisplay($display_id) {
+    return $this->storage->getDisplay($display_id);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function id() {
+    return $this->storage->id();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function uuid() {
+    return $this->storage->uuid();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isNew() {
+    return $this->storage->isNew();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getEntityTypeId() {
+    return $this->storage->getEntityTypeId();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function bundle() {
+    return $this->storage->bundle();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getEntityType() {
+    return $this->storage->getEntityType();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function createDuplicate() {
+    return $this->storage->createDuplicate();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function load($id) {
+    return View::load($id);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function loadMultiple(array $ids = NULL) {
+    return View::loadMultiple($ids);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(array $values = []) {
+    return View::create($values);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function delete() {
+    return $this->storage->delete();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function save() {
+    return $this->storage->save();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function urlInfo($rel = 'edit-form', array $options = []) {
+    return $this->storage->urlInfo($rel, $options);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function toUrl($rel = 'edit-form', array $options = []) {
+    return $this->storage->toUrl($rel, $options);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function link($text = NULL, $rel = 'edit-form', array $options = []) {
+    return $this->storage->link($text, $rel, $options);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function toLink($text = NULL, $rel = 'edit-form', array $options = []) {
+    return $this->storage->toLink($text, $rel, $options);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function label() {
+    return $this->storage->label();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function enforceIsNew($value = TRUE) {
+    return $this->storage->enforceIsNew($value);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function toArray() {
+    return $this->storage->toArray();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function language() {
+    return $this->storage->language();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function access($operation = 'view', AccountInterface $account = NULL, $return_as_object = FALSE) {
+    return $this->storage->access($operation, $account, $return_as_object);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function enable() {
+    return $this->storage->enable();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function disable() {
+    return $this->storage->disable();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function status() {
+    return $this->storage->status();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getOriginalId() {
+    return $this->storage->getOriginalId();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setOriginalId($id) {
+    return $this->storage->setOriginalId($id);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function preSave(EntityStorageInterface $storage) {
+    $this->storage->presave($storage);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function postSave(EntityStorageInterface $storage, $update = TRUE) {
+    $this->storage->postSave($storage, $update);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function preCreate(EntityStorageInterface $storage, array &$values) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function postCreate(EntityStorageInterface $storage) {
+    $this->storage->postCreate($storage);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function preDelete(EntityStorageInterface $storage, array $entities) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function postDelete(EntityStorageInterface $storage, array $entities) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function postLoad(EntityStorageInterface $storage, array &$entities) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getExecutable() {
+    return $this->storage->getExecutable();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function duplicateDisplayAsType($old_display_id, $new_display_type) {
+    return $this->storage->duplicateDisplayAsType($old_display_id, $new_display_type);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function mergeDefaultDisplaysOptions() {
+    $this->storage->mergeDefaultDisplaysOptions();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function uriRelationships() {
+    return $this->storage->uriRelationships();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function referencedEntities() {
+    return $this->storage->referencedEntities();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function url($rel = 'edit-form', $options = []) {
+    return $this->storage->url($rel, $options);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function hasLinkTemplate($key) {
+    return $this->storage->hasLinkTemplate($key);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function calculateDependencies() {
+    $this->storage->calculateDependencies();
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getConfigDependencyKey() {
+    return $this->storage->getConfigDependencyKey();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getConfigDependencyName() {
+    return $this->storage->getConfigDependencyName();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getConfigTarget() {
+    return $this->storage->getConfigTarget();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function onDependencyRemoval(array $dependencies) {
+    return $this->storage->onDependencyRemoval($dependencies);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDependencies() {
+    return $this->storage->getDependencies();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheContexts() {
+    return $this->storage->getCacheContexts();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheTags() {
+    return $this->storage->getCacheTags();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheMaxAge() {
+    return $this->storage->getCacheMaxAge();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getTypedData() {
+    $this->storage->getTypedData();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function addDisplay($plugin_id = 'page', $title = NULL, $id = NULL) {
+    return $this->storage->addDisplay($plugin_id, $title, $id);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isInstallable() {
+    return $this->storage->isInstallable();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setThirdPartySetting($module, $key, $value) {
+    return $this->storage->setThirdPartySetting($module, $key, $value);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getThirdPartySetting($module, $key, $default = NULL) {
+    return $this->storage->getThirdPartySetting($module, $key, $default);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getThirdPartySettings($module) {
+    return $this->storage->getThirdPartySettings($module);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function unsetThirdPartySetting($module, $key) {
+    return $this->storage->unsetThirdPartySetting($module, $key);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getThirdPartyProviders() {
+    return $this->storage->getThirdPartyProviders();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function trustData() {
+    return $this->storage->trustData();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function hasTrustedData() {
+    return $this->storage->hasTrustedData();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function addCacheableDependency($other_object) {
+    $this->storage->addCacheableDependency($other_object);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function addCacheContexts(array $cache_contexts) {
+    return $this->storage->addCacheContexts($cache_contexts);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function mergeCacheMaxAge($max_age) {
+    return $this->storage->mergeCacheMaxAge($max_age);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheTagsToInvalidate() {
+    return $this->storage->getCacheTagsToInvalidate();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function addCacheTags(array $cache_tags) {
+    return $this->storage->addCacheTags($cache_tags);
+  }
+
+}