admin.inc

<?php
/**
 * @file admin.inc
 * Provides the Views' administrative interface.
 */

/**
 * Page callback to list views in the system.
 */
function views_ui_list_views($arg = NULL) {
  if ($arg != NULL) {
    return drupal_not_found();
  }

  $output = theme('views_ui_list_views');
  views_ui_check_advanced_help();
  return $output;
}

/**
 * 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_hide_help_message', FALSE)) {
    return;
  }

  if (!module_exists('advanced_help')) {
    $filename = db_result(db_query("SELECT filename FROM {system} WHERE type = 'module' AND name = 'advanced_help'"));
    if ($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">Hide this message.</a>', array('@modules' => url('admin/build/modules'),'@hide' => url('admin/build/views/tools'))));
    }
    else {
      drupal_set_message(t('If you install the advanced help module from !href, Views will provide more and better help. <a href="@hide">Hide this message.</a>', array('!href' => l('http://drupal.org/project/advanced_help', 'http://drupal.org/project/advanced_help'), '@hide' => url('admin/build/views/tools'))));
    }
  }
}

/**
 * Preprocess the list views theme
 */
function template_preprocess_views_ui_list_views(&$vars) {
  $items = array();
  $sorts = array();

  // Add some js for easier gui.
  views_add_js('view-list');

  $views = views_get_all_views();

  $token_enable = drupal_get_token('views-enable');
  $token_disable = drupal_get_token('views-disable');

  // Respond to a reset command by clearing session and doing a drupal goto
  // back to the base URL.
  if (isset($_GET['op']) && $_GET['op'] == t('Reset')) {
    unset($_SESSION['views']['#admin']);
    drupal_goto('admin/build/views');
  }
  if (count($_GET) <= 1) {
    if (isset($_SESSION['views']['#admin']) && is_array($_SESSION['views']['#admin'])) {
      $_GET += $_SESSION['views']['#admin'];
    }
  }
  else {
    $_SESSION['views']['#admin'] = $_GET;
    unset($_SESSION['views']['#admin']['q']);
  }

  $form_state = array(
    'views' => $views,
    'input' => $_GET,
    'method' => 'get',
    'rerender' => TRUE,
    'no_redirect' => TRUE,
  );

  $vars['widgets'] = drupal_build_form('views_ui_list_views_form', $form_state);

  $vars['help_type_icon'] = theme('advanced_help_topic', 'views', 'view-type');

  $base_tables = views_fetch_base_tables();

  foreach ($views as $view) {
    if ($form_state['values']['tag'] != 'all') {
      if ($form_state['values']['tag'] == 'none') {
        if (!empty($view->tag)) {
          continue;
        }
      }
      else if ($form_state['values']['tag'] != $view->tag) {
        continue;
      }
    }
    if ($form_state['values']['type'] != 'all' && $form_state['values']['type'] != $view->type) {
      continue;
    }

    if ($form_state['values']['base'] != 'all' && $form_state['values']['base'] != $view->base_table) {
      continue;
    }

    if ($form_state['values']['display'] != 'all' && empty($view->display[$form_state['values']['display']])) {
      continue;
    }

    $item = new stdClass();
    $item->ops = array();
    if (empty($view->disabled)) {
      $item->ops[] = l(t('Edit'), "admin/build/views/edit/$view->name");
      $item->ops[] = l(t('Export'), "admin/build/views/export/$view->name");
      $item->ops[] = l(t('Clone'), "admin/build/views/clone/$view->name");
    }
    if ($view->type != t('Default')) {
      $text = $view->type == t('Overridden') ? t('Revert') : t('Delete');
      $item->ops[] = l($text, "admin/build/views/delete/$view->name");
    }
    else {
      if (empty($view->disabled)) {
        $item->ops[] = l(t('Disable'), "admin/build/views/disable/$view->name", array('query' => drupal_get_destination() . '&token=' . $token_disable));
      }
      else {
        $item->ops[] = l(t('Enable'), "admin/build/views/enable/$view->name", array('query' => drupal_get_destination() . '&token=' . $token_enable));
      }
    }

    $item->ops = implode(' | ', $item->ops);
    if (empty($view->display)) {
      $item->path = t('Warning! Broken view!');
    }
    else {
      $item->path = $raw_path = $view->get_path();
      $item->path = $item->path && empty($view->disabled) && strpos($item->path, '%') === FALSE ? l($item->path, $item->path) : check_plain($item->path);
    }

    $item->type = $view->type;
    $item->name = $view->name;

    if (!empty($view->tag)) {
      $item->tag = $view->tag;
    }

    $item->title = $view->get_title();
    $item->base = !empty($base_tables[$view->base_table]['title']) ? $base_tables[$view->base_table]['title'] : t('Broken');

    $item->displays = array();
    foreach ($view->display as $display) {
      if (!empty($display->handler->definition['admin'])) {
        $item->displays[$display->handler->definition['admin']] = TRUE;
      }
    }

    if ($item->displays) {
      ksort($item->displays);
      $item->displays = implode(', ', array_keys($item->displays));
    }

    $item->description = check_plain($view->description);
    $item->classes = empty($view->disabled) ? 'view-enabled' : 'view-disabled';
    $items[] = $item;

    $sort = intval(empty($view->disabled) xor $form_state['values']['sort'] == 'asc');

    switch ($form_state['values']['order']) {
      case 'name':
      default:
        $sort .= strtolower($view->name);
        break;
      case 'title':
        $sort .= strtolower($item->title);
        break;
      case 'path':
        $sort .= strtolower($raw_path); // $path;
        break;
      case 'type':
        $sort .= $view->type . $view->name;
        break;
      case 'tag':
        $sort .= strtolower($view->tag);
        break;
      case 'desc':
        $sort .= strtolower($view->description);
        break;
    }

    $sorts[] = $sort;
  }

  if ($form_state['values']['sort'] == 'desc') {
    arsort($sorts);
  }
  else {
    asort($sorts);
  }

  $i = array();
  foreach ($sorts as $id => $title) {
    $i[] = $items[$id];
  }

  views_add_css('views-list');
  $vars['views'] = $i;

  $getting_started = theme('advanced_help_topic', 'views', 'getting-started', 'title');
  if (!$getting_started) {
    $getting_started = t('Install the advanced help module for the getting started');
  }

  $vars['help'] = t('Not sure what to do? Try the "!getting-started" page.', array('!getting-started' => $getting_started));
}

/**
 * Provide a form for sorting and filtering the list of views.
 */
function views_ui_list_views_form(&$form_state) {
  if (!variable_get('clean_url', FALSE)) {
    $form['q'] = array(
      '#type' => 'hidden',
      '#value' => $_GET['q'],
    );
  }

  $all = array('all' => t('- All -'));
  $none = array('none' => t('- None -'));

  $form['type'] = array(
    '#type' => 'select',
    '#title' => t('Storage'),
    '#options' => array(
      'all' => t('- All -'),
      t('Normal') => t('Normal'),
      t('Default') => t('Default'),
      t('Overridden') => t('Overridden'),
    ),
    '#default_value' => 'all',
  );

  $bases = array();
  foreach (views_fetch_base_tables() as $table => $info) {
    $bases[$table] = $info['title'];
  }

  $form['base'] = array(
    '#type' => 'select',
    '#title' => t('Type'),
    '#options' => array_merge($all, $bases),
    '#default_value' => 'all',
  );

  $tags = array();

  $extras = array();
  foreach ($form_state['views'] as $name => $view) {
    if (!empty($view->tag)) {
      $tags[$view->tag] = $view->tag;
    }
  }

  asort($tags);

  $form['tag'] = array(
    '#type' => 'select',
    '#title' => t('Tag'),
    '#options' => array_merge($all, $none, $tags),
    '#default_value' => 'all',
  );

  $displays = array();
  foreach (views_fetch_plugin_data('display') as $id => $info) {
    if (!empty($info['admin'])) {
      $displays[$id] = $info['admin'];
    }
  }

  asort($displays);

  $form['display'] = array(
    '#type' => 'select',
    '#title' => t('Displays'),
    '#options' => array_merge($all, $displays),
    '#default_value' => 'all',
  );

  $form['order'] = array(
    '#type' => 'select',
    '#title' => t('Sort by'),
    '#options' => array(
      'name' => t('Name'),
      'title' => t('Title'),
      'tag' => t('Tag'),
      'path' => t('Path'),
      'type' => t('Type'),
      'desc' => t('Description'),
    ),
    '#default_value' => 'name',
  );

  $form['sort'] = array(
    '#type' => 'select',
    '#title' => t('Order'),
    '#options' => array(
      'asc' => t('Up'),
      'desc' => t('Down'),
    ),
    '#default_value' => 'asc',
  );

  $form['submit'] = array(
    '#name' => '', // so it won't in the $_GET args
    '#type' => 'submit',
    '#id' => 'edit-views-apply',
    '#value' => t('Apply'),
  );

  if (!empty($_SESSION['views']['#admin'])) {
    $form['reset'] = array(
      '#type' => 'submit',
      '#id' => 'edit-views-reset',
      '#value' => t('Reset'),
    );
  }

  $form['#theme'] = array('views_ui_list_views_form');
  return $form;
}

function theme_views_ui_list_views_form($form) {
  // Don't render these:
  unset($form['form_id']);
  unset($form['form_build_id']);
  unset($form['form_token']);
  return drupal_render($form);
}

/**
 * Page callback for the live preview.
 *
 * @todo make this use a template
 */
function views_ui_preview($js, $view) {
  // Take off the items we know so that we can have just the args passed
  // in for later use.
  $func_args = func_get_args();
  array_shift($func_args); // $js
  array_shift($func_args); // $view
  $display_id = (count($func_args)) ? array_shift($func_args) : 'default';

  $form_state = array(
    'display_id' => $display_id,
    'view_args' => $func_args ? implode('/', $func_args) : '',
    'rerender' => TRUE,
    'no_redirect' => TRUE,
    'view' => &$view,
    'ajax' => $js
  );

  $output = drupal_build_form('views_ui_preview_form', $form_state);
  $args = array();
  if (isset($form_state['view_args']) && $form_state['view_args'] !== '') {
    $args = explode('/', $form_state['view_args']);
  }

  $errors = $view->validate();
  if ($errors === TRUE) {
    $view->ajax = $js;
    $view->live_preview = TRUE;

    // Store the current view URL for later use:
    $view->set_display($form_state['display_id']);
    $view->set_arguments($args);

    if ($view->display_handler->get_option('path')) {
      $path = $view->get_url();
    }

    // Make view links come back to preview.
    $view->override_path = 'admin/build/views/nojs/preview/' . $view->name . '/' . $form_state['display_id'];

    // also override $_GET['q'] so we get the pager
    $_GET['q'] = $view->override_path;
    if ($form_state['view_args']) {
      $_GET['q'] .= '/' . $form_state['view_args'];
    }

    $preview = $view->preview($form_state['display_id'], $args);

    // Get information from the preview for display.
    if (!empty($view->build_info['query'])) {
      $rows = array();
      $query = db_prefix_tables($view->build_info['query']);
      if ($view->build_info['query_args']) {
        _db_query_callback($view->build_info['query_args'], TRUE);
        $query = preg_replace_callback(DB_QUERY_REGEXP, '_db_query_callback', $query);
      }
      $rows[] = array('<strong>' . t('Query') . '</strong>', '<pre>' . check_plain($query) . '</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)) . ' ' . check_plain($query[0]);
        }

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

      $rows[] = array('<strong>' . t('Title') . '</strong>', filter_xss_admin($view->get_title()));
      if (isset($path)) {
        $path = l($path, $path);
      }
      else {
        $path = t('This display has no path.');
      }

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

      $rows[] = array('<strong>' . t('Query build time') . '</strong>', t('@time ms', array('@time' => intval($view->build_time * 100000) / 100)));
      $rows[] = array('<strong>' . t('Query execute time') . '</strong>', t('@time ms', array('@time' => intval($view->execute_time * 100000) / 100)));
      $rows[] = array('<strong>' . t('View render time') . '</strong>', t('@time ms', array('@time' => intval($view->render_time * 100000) / 100)));
      drupal_alter('views_preview_info', $rows, $view);

      $info = theme('table', array(), $rows);
    }
    else {
      $info = theme('table', array(), array(array('<strong>' . t('Query') . '</strong>', t('No query was run'))));
    }
  }
  else {
    foreach ($errors as $error) {
      drupal_set_message($error, 'error');
    }
    $preview = t('Unable to preview due to validation errors.');
    $info = '';
  }

  $info = '<div class="views-query-info">' . $info . '</div>';

  if (variable_get('views_ui_query_on_top', FALSE)) {
    $output .= $info . $preview;
  }
  else {
    $output .= $preview . $info;
  }

  if (!$js) {
    views_add_css('views-admin');
    drupal_set_title($view->get_title());
    return $output;
  }
  else {
    views_include('ajax');
    $object = new stdClass();
    if (!empty($view->js_settings)) {
      $object->js = $view->js_settings;
    }
    $object->display = '';
    if ($messages = theme('status_messages')) {
      $object->display = '<div class="views-messages">' . $messages . '</div>';
    }
    $object->display .= $output;
    $object->title = $view->get_title();
    views_ajax_render($object);
  }
}

/**
 * Form for generating argument information for the live preview.
 */
function views_ui_preview_form(&$form_state) {
  $view = &$form_state['view'];
  $view->init_display();
  $options = array();
  foreach ($view->display as $id => $display) {
    $options[$id] = $display->display_title;
  }

  $form['#attributes'] = array(
    'class' => 'clear-block',
  );

  $form['display_id'] = array(
    '#type' => 'select',
    '#title' => t('Display'),
    '#options' => $options,
    '#default_value' => $form_state['display_id'],
    '#id' => 'preview-display-id',
  );

  $form['args'] = array(
    '#type' => 'textfield',
    '#title' => t('Arguments'),
    '#default_value' => $form_state['view_args'],
    '#description' => t('Separate arguments with a / as though they were a URL path.'),
    '#id' => 'preview-args',
  );

  $form['preview'] = array(
    '#type' => 'submit',
    '#value' => t('Preview'),
    '#id' => 'preview-submit',
  );


  $form['live_preview'] = array(
    '#type' => 'checkbox',
    '#title' => t('Automatic live preview'),
    '#default_value' => !variable_get('views_ui_disable_live_preview', 0),
  );

  $form['#action'] = url("admin/build/views/nojs/preview/$view->name");
  return $form;
}

/**
 * Submit the preview form.
 *
 * This just takes the data and stores it on the form state in a
 * known location. The caller will be responsible for using it.
 */
function views_ui_preview_form_submit(&$form, &$form_state) {
  $form_state['display_id'] = $form_state['values']['display_id'];
  $form_state['view_args'] = $form_state['values']['args'];
}

/**
 * Page callback to add a new view.
 */
function views_ui_add_page() {
  $form_state = array(
    'view' => NULL
  );

  return drupal_build_form('views_ui_add_form', $form_state);
}

/**
 * Page callback to add a new view.
 */
function views_ui_clone_page($view) {
  $form_state = array(
    'view' => $view->copy(),
  );

  drupal_set_title(t('Clone view %view', array('%view' => $view->name)));
  return drupal_build_form('views_ui_add_form', $form_state);
}

/**
 * Form constructor callback to create the views Add Form, phase 1.
 */
function views_ui_add_form(&$form_state) {
  $view = $form_state['view'];
  $form = array();

  $form['name'] = array(
    '#type' => 'textfield',
    '#title' => t('View name'),
    '#description' => t('This is the unique name of the view. It must contain only alphanumeric characters and underscores; it is used to identify the view internally and to generate unique theming template names for this view. If overriding a module provided view, the name must not be changed or instead a new view will be created.'),
    '#required' => TRUE,
    '#maxlength' => 32,
    '#default_value' => $view ? $view->name : '',
    '#attributes' => array('dir'=>'ltr'),
  );

  $form['description'] = array(
    '#type' => 'textfield',
    '#title' => t('View description'),
    '#description' => t('This description will appear on the Views administrative UI to tell you what the view is about.'),
    '#default_value' => $view ? $view->description : '',
    '#maxlength' => 255,
  );

  $form['tag'] = array(
    '#type' => 'textfield',
    '#title' => t('View tag'),
    '#description' => t('Enter an optional tag for this view; it is used only to help sort views on the administrative page.'),
    '#default_value' => $view ? $view->tag : '',
    '#autocomplete_path' => 'admin/views/ajax/autocomplete/tag',
  );

  $base_tables = array();
  foreach (views_fetch_base_tables() as $table => $info) {
    $base_tables[$table] = $info['title'] . '<div class="description">' . $info['description'] . '</div>';
  }

  $form['base_table'] = array(
    '#type' => 'radios',
    '#title' => t('View type'),
    '#description' => t('The view type is the primary table for which information is being retrieved. The view type controls what arguments, fields, sort criteria and filters are available, so once this is set it <strong>cannot be changed</strong>.'),
    '#default_value' => $view ? $view->base_table : 'node',
    '#options' => $base_tables,
  );

  if ($view) {
    $form['base_table']['#disabled'] = TRUE;
  }

  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Next'),
    '#validate' => array('views_ui_add_form_validate'),
    '#submit' => array('views_ui_add_form_submit'),
  );

  return $form;
}

/**
 * Validate the add view form.
 */
function views_ui_add_form_validate($form, &$form_state) {
  $name = $form_state['values']['name'];

  // View name must be alphanumeric or underscores, no other punctuation.
  if (preg_match('/[^a-zA-Z0-9_]/', $name) || is_numeric($name)) {
    form_error($form['name'], t('View name must be alphanumeric or underscores only, but cannot be numeric.'));
  }

  // View name must already exist.
  $view = views_get_view($form_state['values']['name']);
  if ($view && $view->type != t('Default')) {
    form_error($form['name'], t('You must use a unique name for this view.'));
  }
}

/**
 * Process the add view form
 */
function views_ui_add_form_submit($form, &$form_state) {
  $view = $form_state['view'] ? $form_state['view'] : views_new_view();
  $view->name = $form_state['values']['name'];
  $view->description = $form_state['values']['description'];
  $view->tag = $form_state['values']['tag'];
  $view->core = VERSION;
  if (empty($form['base_table']['#disabled'])) {
    $view->base_table = $form_state['values']['base_table'];
  }

  views_ui_cache_set($view);
  $form_state['redirect'] ='admin/build/views/edit/' . $view->name;
}

/**
 * Page to delete a view.
 */
function views_ui_delete_confirm(&$form_state, $view) {
  $form_state['view'] = &$view;
  $form = array();

  $cancel = 'admin/build/views';
  if (!empty($_REQUEST['cancel'])) {
    $cancel = $_REQUEST['cancel'];
  }

  if ($view->type == t('Overridden')) {
    $title = t('Are you sure you want to revert the view %name?', array('%name' => $view->name));
    $desc = t('Reverting the view will delete the view that is in the database, reverting it to the original default view. Any changes you have made will be lost and cannot be recovered.');
    $button = t('Revert');
  }
  else {
    $title = t('Are you sure you want to delete the view %name?', array('%name' => $view->name));
    $desc = t('Deleting a view cannot be undone.');
    $button = t('Delete');
  }

  return confirm_form($form,
                  $title,
                  $cancel,
                  $desc,
                  $button,
                  t('Cancel'));
}

/**
 * Submit handler to delete a view.
 */
function views_ui_delete_confirm_submit(&$form, &$form_state) {
  $form_state['view']->delete();
  views_object_cache_clear('view', $form_state['view']->name);
  drupal_set_message(t('The view has been deleted.'));
  $form_state['redirect'] = 'admin/build/views';
}

/**
 * Page to delete a view.
 */
function views_ui_break_lock_confirm(&$form_state, $view) {
  $form_state['view'] = &$view;
  $form = array();

  if (empty($view->locked)) {
    return t('There is no lock on view %view to break.', array('%name' => $view->name));
  }

  $cancel = 'admin/build/views/edit/' . $view->name;
  if (!empty($_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', $account))),
                  t('Break lock'),
                  t('Cancel'));
}

/**
 * Submit handler to break_lock a view.
 */
function views_ui_break_lock_confirm_submit(&$form, &$form_state) {
  db_query("DELETE FROM {views_object_cache} WHERE obj = 'view' AND name = '%s'", $form_state['view']->name);
  $form_state['redirect'] = 'admin/build/views/edit/' . $form_state['view']->name;
  drupal_set_message(t('The lock has been broken and you may now edit this view.'));
}

/**
 * The main view edit page
 */
function views_ui_edit_page($view) {
  drupal_set_title(t('Edit view %view', array('%view' => $view->name)));
  $output = theme('views_ui_edit_view', $view);
  views_ui_check_advanced_help();
  return $output;
}

/**
 * Export a view for cut & paste.
 */
function views_ui_export_page(&$form_state, $view) {
  $code = $view->export();
  $lines = substr_count($code, "\n");
  $form['code'] = array(
    '#type' => 'textarea',
    '#title' => $view->name,
    '#default_value' => $code,
    '#rows' => $lines,
  );
  return $form;
}

/**
 * Import a view from cut & paste
 */
function views_ui_import_page(&$form_state) {
  $form['name'] = array(
    '#type' => 'textfield',
    '#title' => t('View name'),
    '#description' => t('Enter the name to use for this view if it is different from the source view. Leave blank to use the name of the view.'),
  );

  $form['view'] = array(
    '#type' => 'textarea',
    '#title' => t('Paste view code here'),
    '#required' => TRUE,
  );

  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Import'),
    '#submit' => array('views_ui_import_submit'),
    '#validate' => array('views_ui_import_validate'),
  );
  return $form;
}

/**
 * Validate handler to import a view
 */
function views_ui_import_validate($form, &$form_state) {
  $view = '';
  views_include('view');
  // Be forgiving if someone pastes views code that starts with '<?php'.
  if (substr($form_state['values']['view'], 0, 5) == '<?php') {
    $form_state['values']['view'] = substr($form_state['values']['view'], 5);
  }
  ob_start();
  eval($form_state['values']['view']);
  ob_end_clean();

  if (!is_object($view)) {
    return form_error($form['view'], t('Unable to interpret view code.'));
  }

  if (empty($view->api_version) || $view->api_version < 2) {
    // Check for some value that would only exist on a Views 1 view.
    if (isset($view->url) || isset($view->page) || isset($view->block)) {
      views_include('convert');
      $view = views1_import($view);
      drupal_set_message(t('You are importing a view created in Views version 1. You may need to adjust some parameters to work correctly in version 2.'), 'warning');
    }
    else {
      form_error($form['view'], t('That view is not compatible with this version of Views.'));
    }
  }
  elseif ($view->api_version > views_api_version()) {
    form_error($form['view'], t('That view is created for the version @import_version of views, but you only have @api_version', array(
      '@import_version' => $view->api_version,
      '@api_version' => views_api_version())));
  }

  // View name must be alphanumeric or underscores, no other punctuation.
  if (!empty($form_state['values']['name']) && preg_match('/[^a-zA-Z0-9_]/', $form_state['values']['name'])) {
    form_error($form['name'], t('View name must be alphanumeric or underscores only.'));
  }

  if ($form_state['values']['name']) {
    $view->name = $form_state['values']['name'];
  }

  $test = views_get_view($view->name);
  if ($test && $test->type != t('Default')) {
    form_set_error('', t('A view by that name already exists; please choose a different name'));
  }

  $view->init_display();

  $broken = FALSE;
  // Make sure that all plugins and handlers needed by this view actually exist.
  foreach ($view->display as $id => $display) {
    if (empty($display->handler) || !empty($display->handler->broken)) {
      drupal_set_message(t('Display plugin @plugin is not available.', array('@plugin' => $display->display_plugin)), 'error');
      $broken = TRUE;
      continue;
    }

    $plugin = views_get_plugin('style', $display->handler->get_option('style_plugin'));
    if (!$plugin) {
      drupal_set_message(t('Style plugin @plugin is not available.', array('@plugin' => $display->handler->get_option('style_plugin'))), 'error');
      $broken = TRUE;
    }
    else if ($plugin->uses_row_plugin()) {
      $plugin = views_get_plugin('row', $display->handler->get_option('row_plugin'));
      if (!$plugin) {
        drupal_set_message(t('Row plugin @plugin is not available.', array('@plugin' => $display->handler->get_option('row_plugin'))), 'error');
        $broken = TRUE;
      }
    }

    foreach (views_object_types() as $type => $info) {
      $handlers = $display->handler->get_handlers($type);
      if ($handlers) {
        foreach ($handlers as $id => $handler) {
          if ($handler->broken()) {
            drupal_set_message(t('@type handler @table.@field is not available.', array(
              '@type' => $info['stitle'],
              '@table' => $handler->table,
              '@field' => $handler->field,
            )), 'error');
            $broken = TRUE;
          }
        }
      }
    }
  }

  if ($broken) {
    form_set_error('', t('Unable to import view.'));
  }

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

/**
 * Submit handler for view import
 */
function views_ui_import_submit($form, &$form_state) {
  // Store in cache and then go to edit.
  views_ui_cache_set($form_state['view']);
  $form_state['redirect'] = 'admin/build/views/edit/' . $form_state['view']->name;
}

/**
 * The main edit view form, which is really just a save/cancel/delete button.
 */
function views_ui_edit_view_form(&$form_state, $view) {
  $form['buttons']['save'] = array(
    '#type' => 'submit',
    '#value' => t('Save'),
    '#validate' => array('views_ui_edit_view_form_validate'),
    '#submit' => array('views_ui_edit_view_form_submit'),
  );

  $form['buttons']['cancel'] = array(
    '#type' => 'submit',
    '#value' => t('Cancel'),
    '#submit' => array('views_ui_edit_view_form_cancel'),
  );

  if (is_numeric($view->vid)) {
    $form['buttons']['delete'] = array(
      '#type' => 'submit',
      '#value' => $view->type == t('Overridden') ? t('Revert') : t('Delete'),
      '#submit' => array('views_ui_edit_view_form_delete'),
    );
  }

  $form_state['view'] = &$view;
  return $form;
}

/**
 * Validate that a view is complete and whole.
 */
function views_ui_edit_view_form_validate($form, &$form_state) {
  // Do not validate cancel or delete or revert.
  if (empty($form_state['clicked_button']['#value']) || $form_state['clicked_button']['#value'] != t('Save')) {
    return;
  }

  $errors = $form_state['view']->validate();
  if ($errors !== TRUE) {
    foreach ($errors as $error) {
      form_set_error('', $error);
    }
  }
}

/**
 * Submit handler for the edit view form.
 */
function views_ui_edit_view_form_submit($form, &$form_state) {
  // Go through and remove displayed scheduled for removal.
  foreach ($form_state['view']->display as $id => $display) {
    if (!empty($display->deleted)) {
      unset($form_state['view']->display[$id]);
    }
  }

  $form_state['view']->save();
  drupal_set_message(t('The view %name has been saved.', array('%name' => $form_state['view']->name)));

  // Make sure menu items get rebuilt as neces
  menu_rebuild();

  // Clear the views cache.
  cache_clear_all('*', 'cache_views');

  // Clear the page cache.
  cache_clear_all();

  // Remove this view from cache so we can edit it properly.
  views_object_cache_clear('view', $form_state['view']->name);
}

/**
 * Submit handler for the edit view form.
 */
function views_ui_edit_view_form_cancel($form, &$form_state) {
  // Remove this view from cache so edits will be lost.
  views_object_cache_clear('view', $form_state['view']->name);
  if (empty($form['view']->vid)) {
    // I seem to have to drupal_goto here because I can't get fapi to
    // honor the redirect target. Not sure what I screwed up here.
    drupal_goto('admin/build/views');
  }
}

function views_ui_edit_view_form_delete($form, &$form_state) {
  unset($_REQUEST['destination']);
  // Redirect to the delete confirm page
  $form_state['redirect'] = array('admin/build/views/delete/' . $form_state['view']->name, 'cancel=admin/build/views/edit/' . $form_state['view']->name . '&' . drupal_get_destination());
}

/**
 * Preprocess the view edit page.
 */
function template_preprocess_views_ui_edit_view(&$vars) {
  $view = &$vars['view'];

  $vars['save_button'] = drupal_get_form('views_ui_edit_view_form', $view);

  $table = views_fetch_data($view->base_table);
  $vars['base_table'] = !empty($table['table']['base']['title']) ?
    $table['table']['base']['title'] : t('Unknown or missing table name');

  views_include('tabs');
  $tabs = new views_tabset;

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

  if (!$view->set_display('default')) {
    drupal_set_message(t('This view has a broken default display and cannot be used.'), 'error');
  }

  foreach ($view->display as $display) {
    list($title, $body) = views_ui_display_tab($view, $display);
    // The first display is the default.
    $tabs->set($display->id, $title, $body);
  }

  // This is the area that will render beneath the links
  $form_state = array(