Club Drupal

<?php

/**

 * @file

 * Provides the Views' administrative interface.

 */

/**

 * Create an array of Views admin CSS for adding or attaching.

 *

 * This returns an array of arrays. Each array represents a single

 * file. The array format is:

 * - file: The fully qualified name of the file to send to drupal_add_css

 * - options: An array of options to pass to drupal_add_css.

 */

function views_ui_get_admin_css() {

  $module_path = drupal_get_path('module', 'views_ui');

  $list = array();

  $list[$module_path . '/css/views-admin.css'] = array();

  $list[$module_path . '/css/ie/views-admin.ie7.css'] = array(

    'browsers' => array(

      'IE' => 'lte IE 7',

      '!IE' => FALSE

    ),

    'preprocess' => FALSE,

  );

  $list[$module_path . '/css/views-admin.theme.css'] = array();

  // Add in any theme specific CSS files we have

  $themes = list_themes();

  $theme_key = $GLOBALS['theme'];

  while ($theme_key) {

    // Try to find the admin css file for non-core themes.

    if (!in_array($theme_key, array('garland', 'seven', 'bartik'))) {

      $theme_path = drupal_get_path('theme', $theme_key);

      // First search in the css directory, then in the root folder of the theme.

      if (file_exists($theme_path . "/css/views-admin.$theme_key.css")) {

        $list[$theme_path . "/css/views-admin.$theme_key.css"] = array(

          'group' => CSS_THEME,

        );

      }

      else if (file_exists($theme_path . "/views-admin.$theme_key.css")) {

        $list[$theme_path . "/views-admin.$theme_key.css"] = array(

          'group' => CSS_THEME,

        );

      }

    }

    else {

      $list[$module_path . "/css/views-admin.$theme_key.css"] = array(

        'group' => CSS_THEME,

      );

    }

    $theme_key = isset($themes[$theme_key]->base_theme) ? $themes[$theme_key]->base_theme : '';

  }

  // Views contains style overrides for the following modules

  $module_list = array('contextual', 'advanced_help', 'ctools');

  foreach ($module_list as $module) {

    if (module_exists($module)) {

      $list[$module_path . '/css/views-admin.' . $module . '.css'] = array();

    }

  }

  return $list;

}

/**

 * Adds standard Views administration CSS to the current page.

 */

function views_ui_add_admin_css() {

  foreach (views_ui_get_admin_css() as $file => $options) {

    drupal_add_css($file, $options);

  }

}

/**

 * Check to see if the advanced help module is installed, and if not put up

 * a message.

 *

 * Only call this function if the user is already in a position for this to

 * be useful.

 */

function views_ui_check_advanced_help() {

  if (!variable_get('views_ui_show_advanced_help_warning', TRUE)) {

    return;

  }

  if (!module_exists('advanced_help')) {

    $filename = db_query_range("SELECT filename FROM {system} WHERE type = 'module' AND name = 'advanced_help'", 0, 1)

      ->fetchField();

    if ($filename && file_exists($filename)) {

      drupal_set_message(t('If you <a href="@modules">enable the advanced help module</a>, Views will provide more and better help. <a href="@hide">You can disable this message at the Views settings page.</a>', array('@modules' => url('admin/modules'),'@hide' => url('admin/structure/views/settings'))));

    }

    else {

      drupal_set_message(t('If you install the advanced help module from !href, Views will provide more and better help. <a href="@hide">You can disable this message at the Views settings page.</a>', array('!href' => l('http://drupal.org/project/advanced_help', 'http://drupal.org/project/advanced_help'), '@hide' => url('admin/structure/views/settings'))));

    }

  }

}

/**

 * Returns the results of the live preview.

 */

function views_ui_preview($view, $display_id, $args = array()) {

  // When this function is invoked as a page callback, each Views argument is

  // passed separately.

  if (!is_array($args)) {

    $args = array_slice(func_get_args(), 2);

  }

  // Save $_GET['q'] so it can be restored before returning from this function.

  $q = $_GET['q'];

  // Determine where the query and performance statistics should be output.

  $show_query = variable_get('views_ui_show_sql_query', FALSE);

  $show_info = variable_get('views_ui_show_preview_information', FALSE);

  $show_location = variable_get('views_ui_show_sql_query_where', 'above');

  $show_stats = variable_get('views_ui_show_performance_statistics', FALSE);

  if ($show_stats) {

    $show_stats = variable_get('views_ui_show_sql_query_where', 'above');

  }

  $combined = $show_query && $show_stats;

  $rows = array('query' => array(), 'statistics' => array());

  $output = '';

  $errors = $view->validate();

  if ($errors === TRUE) {

    $view->ajax = TRUE;

    $view->live_preview = TRUE;

    $view->views_ui_context = TRUE;

    // AJAX happens via $_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

    // still have some in $_GET, so we use $_REQUEST to ensure we get it all.

    $exposed_input = $_REQUEST;

    foreach (array('view_name', 'view_display_id', 'view_args', 'view_path', 'view_dom_id', 'pager_element', 'view_base_path', 'ajax_html_ids', 'ajax_page_state', 'form_id', 'form_build_id', 'form_token') as $key) {

      if (isset($exposed_input[$key])) {

        unset($exposed_input[$key]);

      }

    }

    $view->set_exposed_input($exposed_input);

    if (!$view->set_display($display_id)) {

      return t('Invalid display id @display', array('@display' => $display_id));

    }

    $view->set_arguments($args);

    // Store the current view URL for later use:

    if ($view->display_handler->get_option('path')) {

      $path = $view->get_url();

    }

    // Make view links come back to preview.

    $view->override_path = 'admin/structure/views/nojs/preview/' . $view->name . '/' . $display_id;

    // Also override $_GET['q'] so we get the pager.

    $original_path = current_path();

    $_GET['q'] = $view->override_path;

    if ($args) {

      $_GET['q'] .= '/' . implode('/', $args);

    }

    // 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();

    $preview = $view->preview($display_id, $args);

    views_ui_contextual_links_suppress_pop();

    // Reset variables.

    unset($view->override_path);

    $_GET['q'] = $original_path;

    // Prepare the query information and statistics to show either above or

    // below the view preview.

    if ($show_info || $show_query || $show_stats) {

      // Get information from the preview for display.

      if (!empty($view->build_info['query'])) {

        if ($show_query) {

          $query = $view->build_info['query'];

          // Only the sql default class has a method getArguments.

          $quoted = array();

          if (get_class($view->query) == 'views_plugin_query_default') {

            $quoted = $query->getArguments();

            $connection = Database::getConnection();

            foreach ($quoted as $key => $val) {

              if (is_array($val)) {

                $quoted[$key] = implode(', ', array_map(array($connection, 'quote'), $val));

              }

              else {

                $quoted[$key] = $connection->quote($val);

              }

            }

          }

          $rows['query'][] = array('<strong>' . t('Query') . '</strong>', '<pre>' . check_plain(strtr($query, $quoted)) . '</pre>');

          if (!empty($view->additional_queries)) {

            $queries = '<strong>' . t('These queries were run during view rendering:') . '</strong>';

            foreach ($view->additional_queries as $query) {

              if ($queries) {

                $queries .= "\n";

              }

              $queries .= t('[@time ms]', array('@time' => intval($query[1] * 100000) / 100)) . ' ' . $query[0];

            }

            $rows['query'][] = array('<strong>' . t('Other queries') . '</strong>', '<pre>' . $queries . '</pre>');

          }

        }

        if ($show_info) {

          $rows['query'][] = array('<strong>' . t('Title') . '</strong>', filter_xss_admin($view->get_title()));

          if (isset($path)) {

            $path = l($path, $path);

          }

          else {

            $path = t('This display has no path.');

          }

          $rows['query'][] = array('<strong>' . t('Path') . '</strong>', $path);

        }

        if ($show_stats) {

          $rows['statistics'][] = array('<strong>' . t('Query build time') . '</strong>', t('@time ms', array('@time' => intval($view->build_time * 100000) / 100)));

          $rows['statistics'][] = array('<strong>' . t('Query execute time') . '</strong>', t('@time ms', array('@time' => intval($view->execute_time * 100000) / 100)));

          $rows['statistics'][] = array('<strong>' . t('View render time') . '</strong>', t('@time ms', array('@time' => intval($view->render_time * 100000) / 100)));

        }

        drupal_alter('views_preview_info', $rows, $view);

      }

      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'] = array(array('<strong>' . t('Query') . '</strong>', t('No query was run')));

        }

        else {

          $rows['statistics'] = array(array('<strong>' . t('Query') . '</strong>', t('No query was run')));

        }

      }

    }

  }

  else {

    foreach ($errors as $error) {

      drupal_set_message($error, 'error');

    }

    $preview = t('Unable to preview due to validation errors.');

  }

  // Assemble the preview, the query info, and the query statistics in the

  // requested order.

  if ($show_location === 'above') {

    if ($combined) {

      $output .= '<div class="views-query-info">' . theme('table', array('rows' => array_merge($rows['query'], $rows['statistics']))) . '</div>';

    }

    else {

      $output .= '<div class="views-query-info">' . theme('table', array('rows' => $rows['query'])) . '</div>';

    }

  }

  elseif ($show_stats === 'above') {

    $output .= '<div class="views-query-info">' . theme('table', array('rows' => $rows['statistics'])) . '</div>';

  }

  $output .= $preview;

  if ($show_location === 'below') {

    if ($combined) {

      $output .= '<div class="views-query-info">' . theme('table', array('rows' => array_merge($rows['query'], $rows['statistics']))) . '</div>';

    }

    else {

      $output .= '<div class="views-query-info">' . theme('table', array('rows' => $rows['query'])) . '</div>';

    }

  }

  elseif ($show_stats === 'below') {

    $output .= '<div class="views-query-info">' . theme('table', array('rows' => $rows['statistics'])) . '</div>';

  }

  $_GET['q'] = $q;

  return $output;

}

/**

 * Page callback to add a new view.

 */

function views_ui_add_page() {

  views_ui_add_admin_css();

  drupal_set_title(t('Add new view'));

  return drupal_get_form('views_ui_add_form');

}

/**

 * Form builder for the "add new view" page.

 */

function views_ui_add_form($form, &$form_state) {

  ctools_include('dependent');

  $form['#attached']['js'][] = drupal_get_path('module', 'views_ui') . '/js/views-admin.js';

  $form['#attributes']['class'] = array('views-admin');

  $form['human_name'] = array(

    '#type' => 'textfield',

    '#title' => t('View name'),

    '#required' => TRUE,

    '#size' => 32,

    '#default_value' => !empty($form_state['view']) ? $form_state['view']->human_name : '',

    '#maxlength' => 255,

  );

  $form['name'] = array(

    '#type' => 'machine_name',

    '#maxlength' => 128,

    '#machine_name' => array(

      'exists' => 'views_get_view',

      'source' => array('human_name'),

    ),

    '#description' => t('A unique machine-readable name for this View. It must only contain lowercase letters, numbers, and underscores.'),

  );

  $form['description_enable'] = array(

    '#type' => 'checkbox',

    '#title' => t('Description'),

  );

  $form['description'] = array(

    '#type' => 'textfield',

    '#title' => t('Provide description'),

    '#title_display' => 'invisible',

    '#size' => 64,

    '#default_value' => !empty($form_state['view']) ? $form_state['view']->description : '',

    '#dependency' => array(

      'edit-description-enable' => array(1),

    ),

  );

  // Create a wrapper for the entire dynamic portion of the form. Everything

  // that can be updated by AJAX goes somewhere inside here. For example, this

  // is needed by "Show" dropdown (below); it changes the base table of the

  // view and therefore potentially requires all options on the form to be

  // dynamically updated.

  $form['displays'] = array();

  // Create the part of the form that allows the user to select the basic

  // properties of what the view will display.

  $form['displays']['show'] = array(

    '#type' => 'fieldset',

    '#tree' => TRUE,

    '#attributes' => array('class' => array('container-inline')),

  );

  // Create the "Show" dropdown, which allows the base table of the view to be

  // selected.

  $wizard_plugins = views_ui_get_wizards();

  $options = array();

  foreach ($wizard_plugins as $key => $wizard) {

    $options[$key] = $wizard['title'];

  }

  $form['displays']['show']['wizard_key'] = array(

    '#type' => 'select',

    '#title' => t('Show'),

    '#options' => $options,

  );

  $show_form = &$form['displays']['show'];

  $show_form['wizard_key']['#default_value'] = views_ui_get_selected($form_state, array('show', 'wizard_key'), 'node', $show_form['wizard_key']);

  // Changing this dropdown updates the entire content of $form['displays'] via

  // AJAX.

  views_ui_add_ajax_trigger($show_form, 'wizard_key', array('displays'));

  // Build the rest of the form based on the currently selected wizard plugin.

  $wizard_key = $show_form['wizard_key']['#default_value'];

  $get_instance = $wizard_plugins[$wizard_key]['get_instance'];

  $wizard_instance = $get_instance($wizard_plugins[$wizard_key]);

  $form = $wizard_instance->build_form($form, $form_state);

  $form['save'] = array(

    '#type' => 'submit',

    '#value' => t('Save & exit'),

    '#validate' => array('views_ui_wizard_form_validate'),

    '#submit' => array('views_ui_add_form_save_submit'),

  );

  $form['continue'] = array(

    '#type' => 'submit',

    '#value' => t('Continue & edit'),

    '#validate' => array('views_ui_wizard_form_validate'),

    '#submit' => array('views_ui_add_form_store_edit_submit'),

    '#process' => array_merge(array('views_ui_default_button'), element_info_property('submit', '#process', array())),

  );

  $form['cancel'] = array(

    '#type' => 'submit',

    '#value' => t('Cancel'),

    '#submit' => array('views_ui_add_form_cancel_submit'),

    '#limit_validation_errors' => array(),

  );

  return $form;

}

/**

 * Helper form element validator: integer.

 *

 * The problem with this is that the function is private so it's not guaranteed

 * that it might not be renamed/changed. In the future field.module or something else

 * should provide a public validate function.

 *

 * @see _element_validate_integer_positive()

 */

function views_element_validate_integer($element, &$form_state) {

  $value = $element['#value'];

  if ($value !== '' && (!is_numeric($value) || intval($value) != $value)) {

    form_error($element, t('%name must be a positive integer.', array('%name' => $element['#title'])));

  }

}

/**

 * Gets the current value of a #select element, from within a form constructor function.

 *

 * This function is intended for use in highly dynamic forms (in particular the

 * add view wizard) which are rebuilt in different ways depending on which

 * triggering element (AJAX or otherwise) was most recently fired. For example,

 * sometimes it is necessary to decide how to build one dynamic form element

 * based on the value of a different dynamic form element that may not have

 * even been present on the form the last time it was submitted. This function

 * takes care of resolving those conflicts and gives you the proper current

 * value of the requested #select element.

 *

 * By necessity, this function sometimes uses non-validated user input from

 * $form_state['input'] in making its determination. Although it performs some

 * minor validation of its own, it is not complete. The intention is that the

 * return value of this function should only be used to help decide how to

 * build the current form the next time it is reloaded, not to be saved as if

 * it had gone through the normal, final form validation process. Do NOT use

 * the results of this function for any other purpose besides deciding how to

 * build the next version of the form.

 *

 * @param $form_state

 *   The  standard associative array containing the current state of the form.

 * @param $parents

 *   An array of parent keys that point to the part of the submitted form

 *   values that are expected to contain the element's value (in the case where

 *   this form element was actually submitted). In a simple case (assuming

 *   #tree is TRUE throughout the form), if the select element is located in

 *   $form['wrapper']['select'], so that the submitted form values would

 *   normally be found in $form_state['values']['wrapper']['select'], you would

 *   pass array('wrapper', 'select') for this parameter.

 * @param $default_value

 *   The default value to return if the #select element does not currently have

 *   a proper value set based on the submitted input.

 * @param $element

 *   An array representing the current version of the #select element within

 *   the form.

 *

 * @return

 *   The current value of the #select element. A common use for this is to feed

 *   it back into $element['#default_value'] so that the form will be rendered

 *   with the correct value selected.

 */

function views_ui_get_selected($form_state, $parents, $default_value, $element) {

  // For now, don't trust this to work on anything but a #select element.

  if (!isset($element['#type']) || $element['#type'] != 'select' || !isset($element['#options'])) {

    return $default_value;

  }

  // If there is a user-submitted value for this element that matches one of

  // the currently available options attached to it, use that. We need to check

  // $form_state['input'] rather than $form_state['values'] here because the

  // triggering element often has the #limit_validation_errors property set to

  // prevent unwanted errors elsewhere on the form. This means that the

  // $form_state['values'] array won't be complete. We could make it complete

  // by adding each required part of the form to the #limit_validation_errors

  // property individually as the form is being built, but this is difficult to

  // do for a highly dynamic and extensible form. This method is much simpler.

  if (!empty($form_state['input'])) {

    $key_exists = NULL;

    $submitted = drupal_array_get_nested_value($form_state['input'], $parents, $key_exists);

    // Check that the user-submitted value is one of the allowed options before

    // returning it. This is not a substitute for actual form validation;

    // rather it is necessary because, for example, the same select element

    // might have #options A, B, and C under one set of conditions but #options

    // D, E, F under a different set of conditions. So the form submission

    // might have occurred with option A selected, but when the form is rebuilt

    // option A is no longer one of the choices. In that case, we don't want to

    // use the value that was submitted anymore but rather fall back to the

    // default value.

    if ($key_exists && in_array($submitted, array_keys($element['#options']))) {

      return $submitted;

    }

  }

  // Fall back on returning the default value if nothing was returned above.

  return $default_value;

}

/**

 * Converts a form element in the add view wizard to be AJAX-enabled.

 *

 * This function takes a form element and adds AJAX behaviors to it such that

 * changing it triggers another part of the form to update automatically. It

 * also adds a submit button to the form that appears next to the triggering

 * element and that duplicates its functionality for users who do not have

 * JavaScript enabled (the button is automatically hidden for users who do have

 * JavaScript).

 *

 * To use this function, call it directly from your form builder function

 * immediately after you have defined the form element that will serve as the

 * JavaScript trigger. Calling it elsewhere (such as in hook_form_alter()) may

 * mean that the non-JavaScript fallback button does not appear in the correct

 * place in the form.

 *

 * @param $wrapping_element

 *   The element whose child will server as the AJAX trigger. For example, if

 *   $form['some_wrapper']['triggering_element'] represents the element which

 *   will trigger the AJAX behavior, you would pass $form['some_wrapper'] for

 *   this parameter.

 * @param $trigger_key

 *   The key within the wrapping element that identifies which of its children

 *   serves as the AJAX trigger. In the above example, you would pass

 *   'triggering_element' for this parameter.

 * @param $refresh_parents

 *   An array of parent keys that point to the part of the form that will be

 *   refreshed by AJAX. For example, if triggering the AJAX behavior should

 *   cause $form['dynamic_content']['section'] to be refreshed, you would pass

 *   array('dynamic_content', 'section') for this parameter.

 */

function views_ui_add_ajax_trigger(&$wrapping_element, $trigger_key, $refresh_parents) {

  $seen_ids = &drupal_static(__FUNCTION__ . ':seen_ids', array());

  $seen_buttons = &drupal_static(__FUNCTION__ . ':seen_buttons', array());

  // Add the AJAX behavior to the triggering element.

  $triggering_element = &$wrapping_element[$trigger_key];

  $triggering_element['#ajax']['callback'] = 'views_ui_ajax_update_form';

  // We do not use drupal_html_id() to get an ID for the AJAX wrapper, because

  // it remembers IDs across AJAX requests (and won't reuse them), but in our

  // case we need to use the same ID from request to request so that the

  // wrapper can be recognized by the AJAX system and its content can be

  // dynamically updated. So instead, we will keep track of duplicate IDs

  // (within a single request) on our own, later in this function.

  $triggering_element['#ajax']['wrapper'] = 'edit-view-' . implode('-', $refresh_parents) . '-wrapper';

  // Add a submit button for users who do not have JavaScript enabled. It

  // should be displayed next to the triggering element on the form.

  $button_key = $trigger_key . '_trigger_update';

  $wrapping_element[$button_key] = array(

    '#type' => 'submit',

    // Hide this button when JavaScript is enabled.

    '#attributes' => array('class' => array('js-hide')),

    '#submit' => array('views_ui_nojs_submit'),

    // Add a process function to limit this button's validation errors to the

    // triggering element only. We have to do this in #process since until the

    // form API has added the #parents property to the triggering element for

    // us, we don't have any (easy) way to find out where its submitted values

    // will eventually appear in $form_state['values'].

    '#process' => array_merge(array('views_ui_add_limited_validation'), element_info_property('submit', '#process', array())),

    // Add an after-build function that inserts a wrapper around the region of

    // the form that needs to be refreshed by AJAX (so that the AJAX system can

    // detect and dynamically update it). This is done in #after_build because

    // it's a convenient place where we have automatic access to the complete

    // form array, but also to minimize the chance that the HTML we add will

    // get clobbered by code that runs after we have added it.

    '#after_build' => array_merge(element_info_property('submit', '#after_build', array()), array('views_ui_add_ajax_wrapper')),

  );

  // Copy #weight and #access from the triggering element to the button, so

  // that the two elements will be displayed together.

  foreach (array('#weight', '#access') as $property) {

    if (isset($triggering_element[$property])) {

      $wrapping_element[$button_key][$property] = $triggering_element[$property];

    }

  }

  // For easiest integration with the form API and the testing framework, we

  // always give the button a unique #value, rather than playing around with

  // #name.

  $button_title = !empty($triggering_element['#title']) ? $triggering_element['#title'] : $trigger_key;

  if (empty($seen_buttons[$button_title])) {

    $wrapping_element[$button_key]['#value'] = t('Update "@title" choice', array(

      '@title' => $button_title,

    ));

    $seen_buttons[$button_title] = 1;

  }

  else {

    $wrapping_element[$button_key]['#value'] = t('Update "@title" choice (@number)', array(

      '@title' => $button_title,

      '@number' => ++$seen_buttons[$button_title],

   ));

  }

  // Attach custom data to the triggering element and submit button, so we can

  // use it in both the process function and AJAX callback.

  $ajax_data = array(

    'wrapper' => $triggering_element['#ajax']['wrapper'],

    'trigger_key' => $trigger_key,

    'refresh_parents' => $refresh_parents,

    // Keep track of duplicate wrappers so we don't add the same wrapper to the

    // page more than once.

    'duplicate_wrapper' => !empty($seen_ids[$triggering_element['#ajax']['wrapper']]),

  );

  $seen_ids[$triggering_element['#ajax']['wrapper']] = TRUE;

  $triggering_element['#views_ui_ajax_data'] = $ajax_data;

  $wrapping_element[$button_key]['#views_ui_ajax_data'] = $ajax_data;

}

/**

 * Processes a non-JavaScript fallback submit button to limit its validation errors.

 */

function views_ui_add_limited_validation($element, &$form_state) {

  // Retrieve the AJAX triggering element so we can determine its parents. (We

  // know it's at the same level of the complete form array as the submit

  // button, so all we have to do to find it is swap out the submit button's

  // last array parent.)

  $array_parents = $element['#array_parents'];

  array_pop($array_parents);

  $array_parents[] = $element['#views_ui_ajax_data']['trigger_key'];

  $ajax_triggering_element = drupal_array_get_nested_value($form_state['complete form'], $array_parents);

  // Limit this button's validation to the AJAX triggering element, so it can

  // update the form for that change without requiring that the rest of the

  // form be filled out properly yet.

  $element['#limit_validation_errors'] = array($ajax_triggering_element['#parents']);

  // If we are in the process of a form submission and this is the button that

  // was clicked, the form API workflow in form_builder() will have already

  // copied it to $form_state['triggering_element'] before our #process

  // function is run. So we need to make the same modifications in $form_state

  // as we did to the element itself, to ensure that #limit_validation_errors

  // will actually be set in the correct place.

  if (!empty($form_state['triggering_element'])) {

    $clicked_button = &$form_state['triggering_element'];

    if ($clicked_button['#name'] == $element['#name'] && $clicked_button['#value'] == $element['#value']) {

      $clicked_button['#limit_validation_errors'] = $element['#limit_validation_errors'];

    }

  }

  return $element;

}

/**

 * After-build function that adds a wrapper to a form region (for AJAX refreshes).

 *

 * This function inserts a wrapper around the region of the form that needs to

 * be refreshed by AJAX, based on information stored in the corresponding

 * submit button form element.

 */

function views_ui_add_ajax_wrapper($element, &$form_state) {

  // Don't add the wrapper <div> if the same one was already inserted on this

  // form.

  if (empty($element['#views_ui_ajax_data']['duplicate_wrapper'])) {

    // Find the region of the complete form that needs to be refreshed by AJAX.

    // This was earlier stored in a property on the element.

    $complete_form = &$form_state['complete form'];

    $refresh_parents = $element['#views_ui_ajax_data']['refresh_parents'];

    $refresh_element = drupal_array_get_nested_value($complete_form, $refresh_parents);

    // The HTML ID that AJAX expects was also stored in a property on the

    // element, so use that information to insert the wrapper <div> here.

    $id = $element['#views_ui_ajax_data']['wrapper'];

    $refresh_element += array(

      '#prefix' => '',

      '#suffix' => '',

    );

    $refresh_element['#prefix'] = '<div id="' . $id . '" class="views-ui-ajax-wrapper">' . $refresh_element['#prefix'];

    $refresh_element['#suffix'] .= '</div>';

    // Copy the element that needs to be refreshed back into the form, with our

    // modifications to it.

    drupal_array_set_nested_value($complete_form, $refresh_parents, $refresh_element);

  }

  return $element;

}

/**

 * Updates a part of the add view form via AJAX.

 *

 * @return

 *   The part of the form that has changed.

 */

function views_ui_ajax_update_form($form, $form_state) {

  // The region that needs to be updated was stored in a property of the

  // triggering element by views_ui_add_ajax_trigger(), so all we have to do is

  // retrieve that here.

  return drupal_array_get_nested_value($form, $form_state['triggering_element']['#views_ui_ajax_data']['refresh_parents']);

}

/**

 * Non-Javascript fallback for updating the add view form.

 */

function views_ui_nojs_submit($form, &$form_state) {

  $form_state['rebuild'] = TRUE;

}

/**

 * Validate the add view form.

 */

function views_ui_wizard_form_validate($form, &$form_state) {

  $wizard = views_ui_get_wizard($form_state['values']['show']['wizard_key']);

  $form_state['wizard'] = $wizard;

  $get_instance = $wizard['get_instance'];

  $form_state['wizard_instance'] = $get_instance($wizard);

  $errors = $form_state['wizard_instance']->validate($form, $form_state);

  foreach ($errors as $name => $message) {

    form_set_error($name, $message);

  }

}

/**

 * Process the add view form, 'save'.

 */

function views_ui_add_form_save_submit($form, &$form_state) {

  try {

    $view = $form_state['wizard_instance']->create_view($form, $form_state);

  }

  catch (ViewsWizardException $e) {

    drupal_set_message($e->getMessage(), 'error');

    $form_state['redirect'] = 'admin/structure/views';

  }

  $view->save();

  $form_state['redirect'] = 'admin/structure/views';

  if (!empty($view->display['page'])) {

    $display = $view->display['page'];

    if ($display->handler->has_path()) {

      $one_path = $display->handler->get_option('path');

      if (strpos($one_path, '%') === FALSE) {

        $form_state['redirect'] = $one_path;  // PATH TO THE VIEW IF IT HAS ONE

        return;

      }

    }

  }

  drupal_set_message(t('Your view was saved. You may edit it from the list below.'));

}

/**

 * Process the add view form, 'continue'.

 */

function views_ui_add_form_store_edit_submit($form, &$form_state) {

  try {

    $view = $form_state['wizard_instance']->create_view($form, $form_state);

  }

  catch (ViewsWizardException $e) {

    drupal_set_message($e->getMessage(), 'error');

    $form_state['redirect'] = 'admin/structure/views';

  }

  // Just cache it temporarily to edit it.

  views_ui_cache_set($view);

  // If there is a destination query, ensure we still redirect the user to the

  // edit view page, and then redirect the user to the destination.

  $destination = array();

  if (isset($_GET['destination'])) {

    $destination = drupal_get_destination();

    unset($_GET['destination']);

  }

  $form_state['redirect'] = array('admin/structure/views/view/' . $view->name, array('query' => $destination));

}

/**

 * Cancel the add view form.

 */

function views_ui_add_form_cancel_submit($form, &$form_state) {

  $form_state['redirect'] = 'admin/structure/views';

}

/**

 * Form element validation handler for a taxonomy autocomplete field.

 *

 * This allows a taxonomy autocomplete field to be validated outside the

 * standard Field API workflow, without passing in a complete field widget.

 * Instead, all that is required is that $element['#field_name'] contain the

 * name of the taxonomy autocomplete field that is being validated.

 *

 * This function is currently not used for validation directly, although it

 * could be. Instead, it is only used to store the term IDs and vocabulary name

 * in the element value, based on the tags that the user typed in.

 *

 * @see taxonomy_autocomplete_validate()

 */

function views_ui_taxonomy_autocomplete_validate($element, &$form_state) {

  $value = array();

  if ($tags = $element['#value']) {

    // Get the machine names of the vocabularies we will search, keyed by the

    // vocabulary IDs.

    $field = field_info_field($element['#field_name']);

    $vocabularies = array();

    if (!empty($field['settings']['allowed_values'])) {

      foreach ($field['settings']['allowed_values'] as $tree) {

        if ($vocabulary = taxonomy_vocabulary_machine_name_load($tree['vocabulary'])) {

          $vocabularies[$vocabulary->vid] = $tree['vocabulary'];

        }

      }

    }

    // Store the term ID of each (valid) tag that the user typed.

    $typed_terms = drupal_explode_tags($tags);

    foreach ($typed_terms as $typed_term) {

      if ($terms = taxonomy_term_load_multiple(array(), array('name' => trim($typed_term), 'vid' => array_keys($vocabularies)))) {

        $term = array_pop($terms);

        $value['tids'][] = $term->tid;

      }

    }

    // Store the term IDs along with the name of the vocabulary. Currently

    // Views (as well as the Field UI) assumes that there will only be one

    // vocabulary, although technically the API allows there to be more than

    // one.

    if (!empty($value['tids'])) {

      $value['tids'] = array_unique($value['tids']);

      $value['vocabulary'] = array_pop($vocabularies);

    }

  }

  form_set_value($element, $value, $form_state);

}

/**

 * Theme function; returns basic administrative information about a view.

 *

 * TODO: template + preprocess

 */

function theme_views_ui_view_info($variables) {

  $view = $variables['view'];

  $title = $view->get_human_name();

  $displays = _views_ui_get_displays_list($view);

  $displays = empty($displays) ? t('None') : format_plural(count($displays), 'Display', 'Displays') . ': ' . '<em>' . implode(', ', $displays) . '</em>';

  switch ($view->type) {

    case t('Default'):

    default:

      $type = t('In code');

      break;

    case t('Normal'):

      $type = t('In database');

      break;

    case t('Overridden'):

      $type = t('Database overriding code');

  }

  $output = '';

  $output .= '<div class="views-ui-view-title">' . check_plain($title) . "</div>\n";

  $output .= '<div class="views-ui-view-displays">' . $displays . "</div>\n";

  $output .= '<div class="views-ui-view-storage">' . $type . "</div>\n";

  $output .= '<div class="views-ui-view-base">' . t('Type') . ': ' . check_plain($variables['base']). "</div>\n";

  return $output;

}

/**

 * Page to delete a view.

 */

function views_ui_break_lock_confirm($form, &$form_state, $view) {

  $form_state['view'] = &$view;

  $form = array();

  if (empty($view->locked)) {

    $form['message']['#markup'] = t('There is no lock on view %name to break.', array('%name' => $view->name));

    return $form;

  }

  $cancel = 'admin/structure/views/view/' . $view->name . '/edit';

  if (!empty($_REQUEST['cancel'])) {

    $cancel = $_REQUEST['cancel'];

  }

  $account = user_load($view->locked->uid);

  return confirm_form($form,

                  t('Are you sure you want to break the lock on view %name?',

                  array('%name' => $view->name)),

                  $cancel,

                  t('By breaking this lock, any unsaved changes made by !user will be lost!', array('!user' => theme('username', array('account' => $account)))),

                  t('Break lock'),

                  t('Cancel'));

}

/**

 * Submit handler to break_lock a view.

 */

function views_ui_break_lock_confirm_submit(&$form, &$form_state) {

  ctools_object_cache_clear_all('view', $form_state['view']->name);

  $form_state['redirect'] = 'admin/structure/views/view/' . $form_state['view']->name . '/edit';

  drupal_set_message(t('The lock has been broken and you may now edit this view.'));

}

/**

 * Helper function to return the used display_id for the edit page

 *

 * This function handles access to the display.

 */

function views_ui_edit_page_display($view, $display_id) {

  // Determine the displays available for editing.

  if ($tabs = views_ui_edit_page_display_tabs($view, $display_id)) {

    // If a display isn't specified, use the first one.

    if (empty($display_id)) {

      foreach ($tabs as $id => $tab) {

        if (!isset($tab['#access']) || $tab['#access']) {

          $display_id = $id;

          break;

        }

      }

    }

    // If a display is specified, but we don't have access to it, return

    // an access denied page.

    if ($display_id && (!isset($tabs[$display_id]) || (isset($tabs[$display_id]['#access']) && !$tabs[$display_id]['#access']))) {

      return MENU_ACCESS_DENIED;

    }

    return $display_id;

  }

  elseif ($display_id) {

    return MENU_ACCESS_DENIED;

  }

  else {

    $display_id = NULL;

  }

  return $display_id;

}

/**

 * Page callback for the Edit View page.

 */

function views_ui_edit_page($view, $display_id = NULL) {

  $display_id = views_ui_edit_page_display($view, $display_id);

  if (!in_array($display_id, array(MENU_ACCESS_DENIED, MENU_NOT_FOUND))) {

    $build = array();

    $build['edit_form'] = drupal_get_form('views_ui_edit_form', $view, $display_id);

    $build['preview'] = views_ui_build_preview($view, $display_id, FALSE);

  }

  else {

    $build = $display_id;

  }

  return $build;

}

function views_ui_build_preview($view, $display_id, $render = TRUE) {

  if (isset($_POST['ajax_html_ids'])) {

    unset($_POST['ajax_html_ids']);

  }

  $build = array(

    '#theme_wrappers' => array('container'),

    '#attributes' => array('id' => 'views-preview-wrapper', 'class' => 'views-admin clearfix'),

  );

  $form_state = array('build_info' => array('args' => array($view, $display_id)));

  $build['controls'] = drupal_build_form('views_ui_preview_form', $form_state);

  $args = array();

  if (!empty($form_state['values']['view_args'])) {

    $args = explode('/', $form_state['values']['view_args']);

  }

  $build['preview'] = array(

    '#theme_wrappers' => array('container'),

    '#attributes' => array('id' => 'views-live-preview'),

    '#markup' => $render ? views_ui_preview($view->clone_view(), $display_id, $args) : '',

  );

  return $build;

}

/**

 * Form builder callback for editing a View.

 *

 * @todo Remove as many #prefix/#suffix lines as possible. Use #theme_wrappers

 *   instead.

 *

 * @todo Rename to views_ui_edit_view_form(). See that function for the "old"

 *   version.

 *

 * @see views_ui_ajax_get_form()

 */

function views_ui_edit_form($form, &$form_state, $view, $display_id = NULL) {

  // Do not allow the form to be cached, because $form_state['view'] can become

  // stale between page requests.

  // See views_ui_ajax_get_form() for how this affects #ajax.

  // @todo To remove this and allow the form to be cacheable:

  //   - Change $form_state['view'] to $form_state['temporary']['view'].

  //   - Add a #process function to initialize $form_state['temporary']['view']

  //     on cached form submissions.

  //   - Update ctools_include() to support cached forms, or else use

  //     form_load_include().

  $form_state['no_cache'] = TRUE;

  if ($display_id) {

    if (!$view->set_display($display_id)) {

      $form['#markup'] = t('Invalid display id @display', array('@display' => $display_id));

      return $form;

    }

    $view->fix_missing_relationships();

  }

  ctools_include('dependent');

  $form['#attached']['js'][] = ctools_attach_js('dependent');

  $form['#attached']['js'][] = ctools_attach_js('collapsible-div');

  $form['#tree'] = TRUE;

  // @todo When more functionality is added to this form, cloning here may be

  //   too soon. But some of what we do with $view later in this function

  //   results in making it unserializable due to PDO limitations.

  $form_state['view'] = clone($view);

  $form['#attached']['library'][] = array('system', 'ui.tabs');

  $form['#attached']['library'][] = array('system', 'ui.dialog');

  $form['#attached']['library'][] = array('system', 'drupal.ajax');

  $form['#attached']['library'][] = array('system', 'jquery.form');

  // TODO: This should be getting added to the page when an ajax popup calls

  // for it, instead of having to add it manually here.

  $form['#attached']['js'][] = 'misc/tabledrag.js';

  $form['#attached']['css'] = views_ui_get_admin_css();

  $module_path = drupal_get_path('module', 'views_ui');

  $form['#attached']['js'][] = $module_path . '/js/views-admin.js';

  $form['#attached']['js'][] = array(

    'data' => array('views' => array('ajax' => array(

      'id' => '#views-ajax-body',

      'title' => '#views-ajax-title',

      'popup' => '#views-ajax-popup',

      'defaultForm' => views_ui_get_default_ajax_message(),

    ))),

    'type' => 'setting',

  );

  $form += array(

    '#prefix' => '',

    '#suffix' => '',

  );

  $form['#prefix'] = $form['#prefix'] . '<div class="views-edit-view views-admin clearfix">';

  $form['#suffix'] = '</div>' . $form['#suffix'];

  $form['#attributes']['class'] = array('form-edit');

  if (isset($view->locked) && is_object($view->locked)) {

    $form['locked'] = array(

      '#theme_wrappers' => array('container'),

      '#attributes' => array('class' => array('view-locked', 'messages', 'warning')),

      '#markup' => t('This view is being edited by user !user, and is therefore locked from editing by others. This lock is !age old. Click here to <a href="!break">break this lock</a>.', array('!user' => theme('username', array('account' => user_load($view->locked->uid))), '!age' => format_interval(REQUEST_TIME - $view->locked->updated), '!break' => url('admin/structure/views/view/' . $view->name . '/break-lock'))),

    );

  }

  if (isset($view->vid) && $view->vid == 'new') {

    $message = t('* All changes are stored temporarily. Click Save to make your changes permanent. Click Cancel to discard the view.');

  }

  else {

    $message = t('* All changes are stored temporarily. Click Save to make your changes permanent. Click Cancel to discard your changes.');

  }

  $form['changed'] = array(

    '#theme_wrappers' => array('container'),

    '#attributes' => array('class' => array('view-changed', 'messages', 'warning')),

    '#markup' => $message,

  );

  if (empty($view->changed)) {

    $form['changed']['#attributes']['class'][] = 'js-hide';

  }

  $form['help_text'] = array(

    '#prefix' => '<div>',

    '#suffix' => '</div>',

    '#markup' => t('Modify the display(s) of your view below or add new displays.'),

  );

  $form['actions'] = array(

    '#type' => 'actions',

    '#weight' => 0,

  );

  if (empty($view->changed)) {

    $form['actions']['#attributes'] = array(

      'class' => array(

        'js-hide',

      ),

    );

  }

  $form['actions']['save'] = array(

    '#type' => 'submit',

    '#value' => t('Save'),

    // Taken from the "old" UI. @TODO: Review and rename.

    '#validate' => array('views_ui_edit_view_form_validate'),

    '#submit' => array('views_ui_edit_view_form_submit'),

  );

  $form['actions']['cancel'] = array(

    '#type' => 'submit',

    '#value' => t('Cancel'),

    '#submit' => array('views_ui_edit_view_form_cancel'),

  );

  $form['displays'] = array(

    '#prefix' => '<h1 class="unit-title clearfix">' . t('Displays') . '</h1>' . "\n" . '<div class="views-displays">',

    '#suffix' => '</div>',

  );

  $form['displays']['top'] = views_ui_render_display_top($view, $display_id);

  // The rest requires a display to be selected.

  if ($display_id) {

    $form_state['display_id'] = $display_id;

    // The part of the page where editing will take place.

    // This element is the ctools collapsible-div container for the display edit elements.

    $form['displays']['settings'] = array(

      '#theme_wrappers' => array('container'),

      '#attributes' => array(

        'class' => array(

          'views-display-settings',

          'box-margin',

          'ctools-collapsible-container',

        ),

      ),

      '#id' => 'edit-display-settings',

    );

    $display_title = views_ui_get_display_label($view, $display_id, FALSE);

    // Add a handle for the ctools collapsible-div. The handle is the title of the display

    $form['displays']['settings']['tab_title']['#markup'] = '<h2 id="edit-display-settings-title" class="ctools-collapsible-handle">' . t('@display_title details', array('@display_title' => ucwords($display_title))) . '</h2>';

    // Add a text that the display is disabled.

    if (!empty($view->display[$display_id]->handler)) {

      $enabled = $view->display[$display_id]->handler->get_option('enabled');

      if (empty($enabled)) {

        $form['displays']['settings']['disabled']['#markup'] = t('This display is disabled.');

      }

    }

    // The ctools collapsible-div content

    $form['displays']['settings']['settings_content']= array(

      '#theme_wrappers' => array('container'),

      '#id' => 'edit-display-settings-content',

      '#attributes' => array(

        'class' => array(

          'ctools-collapsible-content',

        ),

      ),

    );

    // Add the edit display content

    $form['displays']['settings']['settings_content']['tab_content'] = views_ui_get_display_tab($view, $display_id);

    $form['displays']['settings']['settings_content']['tab_content']['#theme_wrappers'] = array('container');

    $form['displays']['settings']['settings_content']['tab_content']['#attributes'] = array('class' => array('views-display-tab'));

    $form['displays']['settings']['settings_content']['tab_content']['#id'] = 'views-tab-' . $display_id;

    // Mark deleted displays as such.

    if (!empty($view->display[$display_id]->deleted)) {

      $form['displays']['settings']['settings_content']['tab_content']['#attributes']['class'][] = 'views-display-deleted';

    }

    // Mark disabled displays as such.

    if (empty($enabled)) {

      $form['displays']['settings']['settings_content']['tab_content']['#attributes']['class'][] = 'views-display-disabled';

    }

    // The content of the popup dialog.

    $form['ajax-area'] = array(

      '#theme_wrappers' => array('container'),

      '#id' => 'views-ajax-popup',

    );

    $form['ajax-area']['ajax-title'] = array(

      '#markup' => '<h2 id="views-ajax-title"></h2>',

    );

    $form['ajax-area']['ajax-body'] = array(

      '#theme_wrappers' => array('container'),

      '#id' => 'views-ajax-body',

      '#markup' => views_ui_get_default_ajax_message(),

    );

  }

  // If relationships had to be fixed, we want to get that into the cache

  // so that edits work properly, and to try to get the user to save it

  // so that it's not using weird fixed up relationships.

  if (!empty($view->relationships_changed) && empty($_POST)) {

    drupal_set_message(t('This view has been automatically updated to fix missing relationships. While this View should continue to work, you should verify that the automatic updates are correct and save this view.'));

    views_ui_cache_set($view);

  }

  return $form;

}

/**

 * Provide the preview formulas and the preview output, too.

 */

function views_ui_preview_form($form, &$form_state, $view, $display_id = 'default') {

  $form_state['no_cache'] = TRUE;

  $form_state['view'] = $view;

  $form['#attributes'] = array('class' => array('clearfix',));

  // Add a checkbox controlling whether or not this display auto-previews.

  $form['live_preview'] = array(

    '#type' => 'checkbox',

    '#id' => 'edit-displays-live-preview',

    '#title' => t('Auto preview'),

    '#default_value' => variable_get('views_ui_always_live_preview', TRUE),

  );

  // Add the arguments textfield

  $form['view_args'] = array(

    '#type' => 'textfield',

    '#title' => t('Preview with contextual filters:'),

    '#description' => t('Separate contextual filter values with a "/". For example, %example.', array('%example' => '40/12/10')),

    '#id' => 'preview-args',

//      '#attributes' => array('class' => array('ctools-auto-submit')),

  );

  // Add the preview button

  $form['button'] = array(

    '#type' => 'submit',

    '#value' => t('Update preview'),

    '#attributes' => array('class' => array('arguments-preview', 'ctools-auto-submit-click')),

    '#pre_render' => array('ctools_dependent_pre_render'),

    '#prefix' => '<div id="preview-submit-wrapper">',

    '#suffix' => '</div>',

    '#id' => 'preview-submit',

    '#submit' => array('views_ui_edit_form_submit_preview'),

    '#ajax' => array(

      'path' => 'admin/structure/views/view/' . $view->name . '/preview/' . $display_id . '/ajax',

      'wrapper' => 'views-preview-wrapper',

      'event' => 'click',

      'progress' => array('type' => 'throbber'),

      'method' => 'replace',

    ),

    // Make ENTER in arguments textfield (and other controls) submit the form

    // as this button, not the Save button.

    // @todo This only works for JS users. To make this work for nojs users,

    //   we may need to split Preview into a separate form.

    '#process' => array_merge(array('views_ui_default_button'), element_info_property('submit', '#process', array())),

  );

  $form['#action'] = url('admin/structure/views/view/' . $view->name .'/preview/' . $display_id);

  return $form;

}

/**

 * Render the top of the display so it can be updated during ajax operations.

 */

function views_ui_render_display_top($view, $display_id) {

  $element['#theme_wrappers'] = array('views_container');

  $element['#attributes']['class'] = array('views-display-top', 'clearfix');

  $element['#attributes']['id'] = array('views-display-top');

  // Extra actions for the display

  $element['extra_actions'] = array(

    '#theme' => 'links__ctools_dropbutton',

    '#attributes' => array(

        'id' => 'views-display-extra-actions',

        'class' => array(

          'horizontal', 'right', 'links', 'actions',

        ),

      ),

    '#links' => array(

      'edit-details' => array(

        'title' => t('edit view name/description'),

        'href' => "admin/structure/views/nojs/edit-details/$view->name",

        'attributes' => array('class' => array('views-ajax-link')),

      ),

      'analyze' => array(

        'title' => t('analyze view'),

        'href' => "admin/structure/views/nojs/analyze/$view->name/$display_id",

        'attributes' => array('class' => array('views-ajax-link')),

      ),

      'clone' => array(

        'title' => t('clone view'),

        'href' => "admin/structure/views/view/$view->name/clone",

      ),

      'export' => array(

        'title' => t('export view'),

        'href' => "admin/structure/views/view/$view->name/export",

      ),

      'reorder' => array(

        'title' => t('reorder displays'),

        'href' => "admin/structure/views/nojs/reorder-displays/$view->name/$display_id",

        'attributes' => array('class' => array('views-ajax-link')),

      ),

    ),

  );

  // Let other modules add additional links here.

  drupal_alter('views_ui_display_top_links', $element['extra_actions']['#links'], $view, $display_id);

  if (isset($view->type) && $view->type != t('Default')) {

    if ($view->type == t('Overridden')) {

      $element['extra_actions']['#links']['revert'] = array(

        'title' => t('revert view'),

        'href' => "admin/structure/views/view/$view->name/revert",

        'query' => array('destination' => "admin/structure/views/view/$view->name"),

      );

    }

    else {

      $element['extra_actions']['#links']['delete'] = array(

        'title' => t('delete view'),

        'href' => "admin/structure/views/view/$view->name/delete",

      );

    }

  }

  // Determine the displays available for editing.

  if ($tabs = views_ui_edit_page_display_tabs($view, $display_id)) {

    if ($display_id) {

      $tabs[$display_id]['#active'] = TRUE;

    }

    $tabs['#prefix'] = '<h2 class="element-invisible">' . t('Secondary tabs') . '</h2><ul id = "views-display-menu-tabs" class="tabs secondary">';

    $tabs['#suffix'] = '</ul>';

    $element['tabs'] = $tabs;

  }

  // Buttons for adding a new display.

  foreach (views_fetch_plugin_names('display', NULL, array($view->base_table)) as $type => $label) {

    $element['add_display'][$type] = array(

      '#type' => 'submit',

      '#value' => t('Add !display', array('!display' => $label)),

      '#limit_validation_errors' => array(),

      '#submit' => array('views_ui_edit_form_submit_add_display', 'views_ui_edit_form_submit_delay_destination'),

      '#attributes' => array('class' => array('add-display')),

      // Allow JavaScript to remove the 'Add ' prefix from the button label when

      // placing the button in a "Add" dropdown menu.

      '#process' => array_merge(array('views_ui_form_button_was_clicked'), element_info_property('submit', '#process', array())),

      '#values' => array(t('Add !display', array('!display' => $label)), $label),

    );

  }

  return $element;

}

function views_ui_get_default_ajax_message() {

  return '<div class="message">' . t("Click on an item to edit that item's details.") . '</div>';

}

/**

 * Submit handler to add a display to a view.

 */

function views_ui_edit_form_submit_add_display($form, &$form_state) {

  $view = $form_state['view'];

  // Create the new display.

  $parents = $form_state['triggering_element']['#parents'];

  $display_type = array_pop($parents);

  $display_id = $view->add_display($display_type);

  views_ui_cache_set($view);

  // Redirect to the new display's edit page.

  $form_state['redirect'] = 'admin/structure/views/view/' . $view->name . '/edit/' . $display_id;

}

/**

 * Submit handler to duplicate a display for a view.

 */

function views_ui_edit_form_submit_duplicate_display($form, &$form_state) {

  $view = $form_state['view'];

  $display_id = $form_state['display_id'];

  // Create the new display.

  $display = $view->display[$display_id];

  $new_display_id = $view->add_display($display->display_plugin);

  $view->display[$new_display_id] = clone $display;

  $view->display[$new_display_id]->id = $new_display_id;

  // By setting the current display the changed marker will appear on the new

  // display.

  $view->current_display = $new_display_id;

  views_ui_cache_set($view);

  // Redirect to the new display's edit page.

  $form_state['redirect'] = 'admin/structure/views/view/' . $view->name . '/edit/' . $new_display_id;

}

/**

 * Submit handler to delete a display from a view.

 */

function views_ui_edit_form_submit_delete_display($form, &$form_state) {

  $view = $form_state['view'];

  $display_id = $form_state['display_id'];

  // Mark the display for deletion.

  $view->display[$display_id]->deleted = TRUE;

  views_ui_cache_set($view);

  // Redirect to the top-level edit page. The first remaining display will

  // become the active display.

  $form_state['redirect'] = 'admin/structure/views/view/' . $view->name;

}

/**

 * Submit handler to add a restore a removed display to a view.

 */

function views_ui_edit_form_submit_undo_delete_display($form, &$form_state) {

  // Create the new display

  $id = $form_state['display_id'];

  $form_state['view']->display[$id]->deleted = FALSE;

  // Store in cache

  views_ui_cache_set($form_state['view']);

  // Redirect to the top-level edit page.

  $form_state['redirect'] = 'admin/structure/views/view/' . $form_state['view']->name . '/edit/' . $id;

}

/**

 * Submit handler to enable a disabled display.

 */

function views_ui_edit_form_submit_enable_display($form, &$form_state) {

  $id = $form_state['display_id'];

  // set_option doesn't work because this would might affect upper displays

  $form_state['view']->display[$id]->handler->set_option('enabled', TRUE);

  // Store in cache

  views_ui_cache_set($form_state['view']);

  // Redirect to the top-level edit page.

  $form_state['redirect'] = 'admin/structure/views/view/' . $form_state['view']->name . '/edit/' . $id;

}

/**

 * Submit handler to disable display.

 */

function views_ui_edit_form_submit_disable_display($form, &$form_state) {

  $id = $form_state['display_id'];

  $form_state['view']->display[$id]->handler->set_option('enabled', FALSE);

  // Store in cache

  views_ui_cache_set($form_state['view']);

  // Redirect to the top-level edit page.

  $form_state['redirect'] = 'admin/structure/views/view/' . $form_state['view']->name . '/edit/' . $id;

}

/**

 * Submit handler when Preview button is clicked.

 */

function views_ui_edit_form_submit_preview($form, &$form_state) {

  // Rebuild the form with a pristine $view object.

  $form_state['build_info']['args'][0] = views_ui_cache_load($form_state['view']->name);

  $form_state['show_preview'] = TRUE;

  $form_state['rebuild'] = TRUE;

}

/**

 * Submit handler for form buttons that do not complete a form workflow.

 *

 * The Edit View form is a multistep form workflow, but with state managed by

 * the CTools object cache rather than $form_state['rebuild']. Without this

 * submit handler, buttons that add or remove displays would redirect to the

 * destination parameter (e.g., when the Edit View form is linked to from a

 * contextual link). This handler can be added to buttons whose form submission

 * should not yet redirect to the destination.

 */

function views_ui_edit_form_submit_delay_destination($form, &$form_state) {

  if (isset($_GET['destination']) && $form_state['redirect'] !== FALSE) {

    if (!isset($form_state['redirect'])) {

      $form_state['redirect'] = $_GET['q'];

    }

    if (is_string($form_state['redirect'])) {

      $form_state['redirect'] = array($form_state['redirect']);

    }

    $options = isset($form_state['redirect'][1]) ? $form_state['redirect'][1] : array();

    if (!isset($options['query']['destination'])) {

      $options['query']['destination'] = $_GET['destination'];

    }

    $form_state['redirect'][1] = $options;

    unset($_GET['destination']);

  }

}

/**

 * Adds tabs for navigating across Displays when editing a View.

 *

 * This function can be called from hook_menu_local_tasks_alter() to implement

 * these tabs as secondary local tasks, or it can be called from elsewhere if

 * having them as secondary local tasks isn't desired. The caller is responsible

 * for setting the active tab's #active property to TRUE.

 *

 * @param view $view

 *    The view which will be edited.

 * @param $display_id

 *    The display_id which is edited on the current request.

 */

function views_ui_edit_page_display_tabs($view, $display_id = NULL) {

  $tabs = array();

  // Create a tab for each display.

  foreach ($view->display as $id => $display) {

    $tabs[$id] = array(

      '#theme' => 'menu_local_task',

      '#link' => array(

        'title' => views_ui_get_display_label($view, $id),

        'href' => 'admin/structure/views/view/' . $view->name . '/edit/' . $id,

        'localized_options' => array(),

      ),

    );

    if (!empty($display->deleted)) {

      $tabs[$id]['#link']['localized_options']['attributes']['class'][] = 'views-display-deleted-link';

    }

    if (isset($display->display_options['enabled']) && !$display->display_options['enabled']) {

      $tabs[$id]['#link']['localized_options']['attributes']['class'][] = 'views-display-disabled-link';

    }

  }

  // If the default display isn't supposed to be shown, don't display its tab, unless it's the only display.

  if ((!views_ui_show_default_display($view) && $display_id != 'default') && count($tabs) > 1) {

    $tabs['default']['#access'] = FALSE;

  }

  // Mark the display tab as red to show validation errors.

  $view->validate();

  foreach ($view->display as $id => $display) {

    if (!empty($view->display_errors[$id])) {

      // Always show the tab.

      $tabs[$id]['#access'] = TRUE;

      // Add a class to mark the error and a title to make a hover tip.

      $tabs[$id]['#link']['localized_options']['attributes']['class'][] = 'error';

      $tabs[$id]['#link']['localized_options']['attributes']['title'] = t('This display has one or more validation errors; please review it.');

    }

  }

  return $tabs;

}

/**

 * Controls whether or not the default display should have its own tab on edit.

 */

function views_ui_show_default_display($view) {

  // Always show the default display for advanced users who prefer that mode.

  $advanced_mode = variable_get('views_ui_show_master_display', FALSE);

  // For other users, show the default display only if there are no others, and

  // hide it if there's at least one "real" display.

  $additional_displays = (count($view->display) == 1);

  return $advanced_mode || $additional_displays;

}

/**

 * Returns a renderable array representing the edit page for one display.

 */

function views_ui_get_display_tab($view, $display_id) {

  $build = array();

  $display = $view->display[$display_id];

  // If the plugin doesn't exist, display an error message instead of an edit

  // page.

  if (empty($display->handler)) {

    $title = isset($display->display_title) ? $display->display_title : t('Invalid');

    // @TODO: Improved UX for the case where a plugin is missing.

    $build['#markup'] = t("Error: Display @display refers to a plugin named '@plugin', but that plugin is not available.", array('@display' => $display->id, '@plugin' => $display->display_plugin));

  }

  // Build the content of the edit page.

  else {

    $build['details'] = views_ui_get_display_tab_details($view, $display);

  }

  // In AJAX context, views_ui_regenerate_tab() returns this outside of form

  // context, so hook_form_views_ui_edit_form_alter() is insufficient.

  drupal_alter('views_ui_display_tab', $build, $view, $display_id);

  return $build;

}

/**

 * Helper function to get the display details section of the edit UI.

 *

 * @param $view

 * @param $display

 *

 * @return array

 *   A renderable page build array.

 */

function views_ui_get_display_tab_details($view, $display) {

  $display_title = views_ui_get_display_label($view, $display->id, FALSE);

  $build = array(

    '#theme_wrappers' => array('container'),

    '#attributes' => array('id' => 'edit-display-settings-details',),

  );

  $plugin = views_fetch_plugin_data('display', $view->display[$display->id]->display_plugin);

  // The following is for display purposes only. We need to determine if there is more than one button and wrap

  // the buttons in a .ctools-dropbutton class if more than one is present.  Otherwise, we'll just wrap the

  // actions in the .ctools-button class.

  $isDisplayDeleted = !empty($display->deleted);

  $isDeletable = empty($plugin['no remove']);

  // The master display cannot be cloned.

  $isDefault = $display->id == 'default';

  // @todo: Figure out why get_option doesn't work here.

  $isEnabled = $display->handler->get_option('enabled');

  if (!$isDisplayDeleted && $isDeletable && !$isDefault) {

    $prefix = '<div class="ctools-no-js ctools-button ctools-dropbutton"><div class="ctools-link"><a href="#" class="ctools-twisty ctools-text">open</a></div><div class="ctools-content"><ul class="horizontal right actions">';

    $suffix = '</ul></div></div>';