Club Drupal

<?php

/**

 * @file

 * Primarily Drupal hooks and global API functions to manipulate views.

 *

 * This is the main module file for Views. The main entry points into

 * this module are views_page() and views_block(), where it handles

 * incoming page and block requests.

 */

/**

 * Implements hook_help().

 */

function views_help($path, $arg) {

  switch ($path) {

    case 'admin/help#views':

      $output = '';

      $output .= '<h3>' . t('About') . '</h3>';

      $output .= '<p>' . t('The Views module provides a back end to fetch information from content, user accounts, taxonomy terms, and other entities from the database and present it to the user as a grid, HTML list, table, unformatted list, etc. The resulting displays are known generally as views.') . '</p>';

      $output .= '<p>' . t('For more information, see the <a href="@views" target="blank">online documentation for the Views</a>.', array('@views' => 'https://www.drupal.org/documentation/modules/views')) . '</p>';

      $output .= '<p>' . t('In order to create and modify your own views using the administration and configuration user interface, you will need to enable either the Views UI module in core or a contributed module that provides a user interface for Views. See the <a href="/admin/structure/views">Views UI module help page</a> for more information.') . '</p>';

      $output .= '<h3>' . t('Uses') . '</h3>';

      $output .= '<dl>';

      $output .= '<dt>' . t('Adding functionality to administrative pages') . '</dt>';

      $output .= '<dd>' . t('The Views module adds functionality to some core administration pages. For example, <em>admin/content</em> uses Views to filter and sort content. With Views uninstalled, <em>admin/content</em> is more limited.') . '</dd>';

      $output .= '<dt>' . t('Expanding Views functionality') . '</dt>';

      $output .= '<dd>' . t('Contributed projects that support the Views module can be found in the  <a href="@views-related" target="blank">online documentation for Views-related contributed modules.</a>.', array('@views-related' => 'https://www.drupal.org/documentation/modules/views/add-ons')) . '</dd>';

      $output .= '<dt>' . t('Improving table accessibility') . '</dt>';

      $output .= '<dd>' . t('Views tables include semantic markup to improve accessibility. Data cells are automatically associated with header cells through id and header attributes. To improve the accessibility of your tables you can add descriptive elements within the Views table settings. The caption element can introduce context for a table, making it easier to understand. The summary element can provide an overview of how the data has been organized and how to navigate the table. Both the caption and summary are visible by default and also implemented according to HTML5 guidelines.') . '</dd>';

      return $output;

  }

}

/**

 * Advertise the current views api version.

 */

function views_api_version() {

  return '3.0';

}

/**

 * Implements hook_forms().

 *

 * To provide distinct form IDs for Views forms, the View name and

 * specific display name are appended to the base ID,

 * views_form_views_form. When such a form is built or submitted, this

 * function will return the proper callback function to use for the given form.

 */

function views_forms($form_id, $args) {

  if (strpos($form_id, 'views_form_') === 0) {

    return array(

      $form_id => array(

        'callback' => 'views_form',

      ),

    );

  }

}

/**

 * Returns a form ID for a Views form using the name and display of the View.

 */

function views_form_id($view) {

  $parts = array(

    'views_form',

    $view->name,

    $view->current_display,

  );

  return implode('_', $parts);

}

/**

 * Views will not load plugins advertising a version older than this.

 */

function views_api_minimum_version() {

  return '2';

}

/**

 * Implements hook_theme().

 *

 * Register views theming functions.

 */

function views_theme($existing, $type, $theme, $path) {

  $path = drupal_get_path('module', 'views');

  ctools_include('theme', 'views', 'theme');

  // Some quasi clever array merging here.

  $base = array(

    'file' => 'theme.inc',

    'path' => $path . '/theme',

  );

  // Our extra version of pager from pager.inc.

  $hooks['views_mini_pager'] = $base + array(

    'variables' => array(

      'tags' => array(),

      'element' => 0,

      'parameters' => array(),

    ),

    'pattern' => 'views_mini_pager__',

  );

  $variables = array(

    // For displays, we pass in a dummy array as the first parameter, since

    // $view is an object but the core contextual_preprocess() function only

    // attaches contextual links when the primary theme argument is an array.

    'display' => array('view_array' => array(), 'view' => NULL),

    'style' => array(

      'view' => NULL,

      'options' => NULL,

      'rows' => NULL,

      'title' => NULL,

    ),

    'row' => array(

      'view' => NULL,

      'options' => NULL,

      'row' => NULL,

      'field_alias' => NULL,

    ),

    'exposed_form' => array('view' => NULL, 'options' => NULL),

    'pager' => array(

      'view' => NULL,

      'options' => NULL,

      'tags' => array(),

      'quantity' => 10,

      'element' => 0,

      'parameters' => array(),

    ),

  );

  // Default view themes.

  $hooks['views_view_field'] = $base + array(

    'pattern' => 'views_view_field__',

    'variables' => array('view' => NULL, 'field' => NULL, 'row' => NULL),

  );

  $hooks['views_view_grouping'] = $base + array(

    'pattern' => 'views_view_grouping__',

    'variables' => array(

      'view' => NULL,

      'grouping' => NULL,

      'grouping_level' => NULL,

      'rows' => NULL,

      'title' => NULL,

    ),

  );

  $plugins = views_fetch_plugin_data();

  // Register theme functions for all style plugins.

  foreach ($plugins as $type => $info) {

    foreach ($info as $plugin => $def) {

      if (isset($def['theme']) && (!isset($def['register theme']) || !empty($def['register theme']))) {

        $hooks[$def['theme']] = array(

          'pattern' => $def['theme'] . '__',

          'file' => $def['theme file'],

          'path' => $def['theme path'],

          'variables' => $variables[$type],

        );

        $include = DRUPAL_ROOT . '/' . $def['theme path'] . '/' . $def['theme file'];

        if (file_exists($include)) {

          require_once $include;

        }

        if (!function_exists('theme_' . $def['theme'])) {

          $hooks[$def['theme']]['template'] = drupal_clean_css_identifier($def['theme']);

        }

      }

      if (isset($def['additional themes'])) {

        foreach ($def['additional themes'] as $theme => $theme_type) {

          if (empty($theme_type)) {

            $theme = $theme_type;

            $theme_type = $type;

          }

          $hooks[$theme] = array(

            'pattern' => $theme . '__',

            'file' => $def['theme file'],

            'path' => $def['theme path'],

            'variables' => $variables[$theme_type],

          );

          if (!function_exists('theme_' . $theme)) {

            $hooks[$theme]['template'] = drupal_clean_css_identifier($theme);

          }

        }

      }

    }

  }

  $hooks['views_form_views_form'] = $base + array(

    'render element' => 'form',

  );

  $hooks['views_exposed_form'] = $base + array(

    'template' => 'views-exposed-form',

    'pattern' => 'views_exposed_form__',

    'render element' => 'form',

  );

  $hooks['views_more'] = $base + array(

    'template' => 'views-more',

    'pattern' => 'views_more__',

    'variables' => array(

      'more_url' => NULL,

      'link_text' => 'more',

      'view' => NULL,

    ),

  );

  // Add theme suggestions which are part of modules.

  foreach (views_get_module_apis() as $info) {

    if (isset($info['template path'])) {

      $hooks += _views_find_module_templates($hooks, $info['template path']);

    }

  }

  return $hooks;

}

/**

 * Scans a directory of a module for template files.

 *

 * @param array $cache

 *   The existing cache of theme hooks to test against.

 * @param string $path

 *   The path to search.

 *

 * @see drupal_find_theme_templates()

 */

function _views_find_module_templates($cache, $path) {

  $templates = array();

  $regex = '/\.tpl\.php$/';

  // Because drupal_system_listing works the way it does, we check for real

  // templates separately from checking for patterns.

  $files = drupal_system_listing($regex, $path, 'name', 0);

  foreach ($files as $template => $file) {

    // Chop off the remaining extensions if there are any. $template already

    // has the rightmost extension removed, but there might still be more,

    // such as with .tpl.php, which still has .tpl in $template at this point.

    if (($pos = strpos($template, '.')) !== FALSE) {

      $template = substr($template, 0, $pos);

    }

    // Transform - in filenames to _ to match function naming scheme

    // for the purposes of searching.

    $hook = strtr($template, '-', '_');

    if (isset($cache[$hook])) {

      $templates[$hook] = array(

        'template' => $template,

        'path' => dirname($file->filename),

        'includes' => isset($cache[$hook]['includes']) ? $cache[$hook]['includes'] : NULL,

      );

    }

    // Ensure that the pattern is maintained from base themes to its sub-themes.

    // Each sub-theme will have their templates scanned so the pattern must be

    // held for subsequent runs.

    if (isset($cache[$hook]['pattern'])) {

      $templates[$hook]['pattern'] = $cache[$hook]['pattern'];

    }

  }

  $patterns = array_keys($files);

  foreach ($cache as $hook => $info) {

    if (!empty($info['pattern'])) {

      // Transform _ in pattern to - to match file naming scheme

      // for the purposes of searching.

      $pattern = strtr($info['pattern'], '_', '-');

      $matches = preg_grep('/^' . $pattern . '/', $patterns);

      if ($matches) {

        foreach ($matches as $match) {

          $file = substr($match, 0, strpos($match, '.'));

          // Put the underscores back in for the hook name and register this

          // pattern.

          $templates[strtr($file, '-', '_')] = array(

            'template' => $file,

            'path' => dirname($files[$match]->uri),

            'variables' => isset($info['variables']) ? $info['variables'] : NULL,

            'render element' => isset($info['render element']) ? $info['render element'] : NULL,

            'base hook' => $hook,

            'includes' => isset($info['includes']) ? $info['includes'] : NULL,

          );

        }

      }

    }

  }

  return $templates;

}

/**

 * Returns a list of plugins and metadata about them.

 *

 * @return array

 *   An array keyed by PLUGIN_TYPE:PLUGIN_NAME, like 'display:page' or

 *   'pager:full', containing an array with the following keys:

 *   - title: The plugin's title.

 *   - type: The plugin type.

 *   - module: The module providing the plugin.

 *   - views: An array of enabled Views that are currently using this plugin,

 *     keyed by machine name.

 */

function views_plugin_list() {

  $plugin_data = views_fetch_plugin_data();

  $plugins = array();

  foreach (views_get_enabled_views() as $view) {

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

      foreach ($plugin_data as $type => $info) {

        if ($type == 'display' && isset($display->display_plugin)) {

          $name = $display->display_plugin;

        }

        elseif (isset($display->display_options["{$type}_plugin"])) {

          $name = $display->display_options["{$type}_plugin"];

        }

        elseif (isset($display->display_options[$type]['type'])) {

          $name = $display->display_options[$type]['type'];

        }

        else {

          continue;

        }

        // Key first by the plugin type, then the name.

        $key = $type . ':' . $name;

        // Add info for this plugin.

        if (!isset($plugins[$key])) {

          $plugins[$key] = array(

            'type' => $type,

            'title' => check_plain($info[$name]['title']),

            'module' => check_plain($info[$name]['module']),

            'views' => array(),

          );

        }

        // Add this view to the list for this plugin.

        $plugins[$key]['views'][$view->name] = $view->name;

      }

    }

  }

  return $plugins;

}

/**

 * Preprocess a node.

 *

 * A theme preprocess function to automatically allow view-based node

 * templates if called from a view.

 *

 * The 'modules/node.views.inc' file is a better place for this, but

 * we haven't got a chance to load that file before Drupal builds the

 * node portion of the theme registry.

 */

function views_preprocess_node(&$vars) {

  // The 'view' attribute of the node is added in views_preprocess_node()

  if (!empty($vars['node']->view) && !empty($vars['node']->view->name)) {

    $vars['view'] = $vars['node']->view;

    $vars['theme_hook_suggestions'][] = 'node__view__' . $vars['node']->view->name;

    if (!empty($vars['node']->view->current_display)) {

      $vars['theme_hook_suggestions'][] = 'node__view__' . $vars['node']->view->name . '__' . $vars['node']->view->current_display;

      // If a node is being rendered in a view, and the view does not have a

      // path, prevent drupal from accidentally setting the $page variable.

      if ($vars['page'] && $vars['view_mode'] == 'full' && !$vars['view']->display_handler->has_path()) {

        $vars['page'] = FALSE;

      }

    }

  }

  // Allow to alter comments and links based on the settings in the row plugin.

  if (!empty($vars['view']->style_plugin->row_plugin) && get_class($vars['view']->style_plugin->row_plugin) == 'views_plugin_row_node_view') {

    node_row_node_view_preprocess_node($vars);

  }

}

/**

 * Preprocess a comment.

 *

 * A theme preprocess function to automatically allow view-based node

 * templates if called from a view.

 */

function views_preprocess_comment(&$vars) {

  // The 'view' attribute of the node is added in

  // template_preprocess_views_view_row_comment().

  if (!empty($vars['node']->view) && !empty($vars['node']->view->name)) {

    $vars['view'] = &$vars['node']->view;

    $vars['theme_hook_suggestions'][] = 'comment__view__' . $vars['node']->view->name;

    if (!empty($vars['node']->view->current_display)) {

      $vars['theme_hook_suggestions'][] = 'comment__view__' . $vars['node']->view->name . '__' . $vars['node']->view->current_display;

    }

  }

}

/**

 * Implements hook_permission().

 */

function views_permission() {

  return array(

    'administer views' => array(

      'title' => t('Administer views'),

      'description' => t('Access the views administration pages.'),

      'restrict access' => TRUE,

    ),

    'access all views' => array(

      'title' => t('Bypass views access control'),

      'description' => t('Bypass access control when accessing views.'),

      'restrict access' => TRUE,

    ),

  );

}

/**

 * Implements hook_menu().

 */

function views_menu() {

  $items = array();

  $items['views/ajax'] = array(

    'title' => 'Views',

    'page callback' => 'views_ajax',

    'theme callback' => 'ajax_base_page_theme',

    'delivery callback' => 'ajax_deliver',

    'access callback' => TRUE,

    'description' => 'Ajax callback for view loading.',

    'type' => MENU_CALLBACK,

    'file' => 'includes/ajax.inc',

  );

  // Path is not admin/structure/views due to menu complications with the

  // wildcards from the generic ajax callback.

  $items['admin/views/ajax/autocomplete/user'] = array(

    'page callback' => 'views_ajax_autocomplete_user',

    'theme callback' => 'ajax_base_page_theme',

    'access callback' => 'user_access',

    'access arguments' => array('access user profiles'),

    'type' => MENU_CALLBACK,

    'file' => 'includes/ajax.inc',

  );

  // Define another taxonomy autocomplete because the default one of drupal

  // does not support a vid a argument anymore.

  $items['admin/views/ajax/autocomplete/taxonomy'] = array(

    'page callback' => 'views_ajax_autocomplete_taxonomy',

    'theme callback' => 'ajax_base_page_theme',

    'access callback' => 'user_access',

    'access arguments' => array('access content'),

    'type' => MENU_CALLBACK,

    'file' => 'includes/ajax.inc',

  );

  return $items;

}

/**

 * Implements hook_menu_alter().

 */

function views_menu_alter(&$callbacks) {

  $our_paths = array();

  $views = views_get_applicable_views('uses hook menu');

  foreach ($views as $data) {

    list($view, $display_id) = $data;

    $result = $view->execute_hook_menu($display_id, $callbacks);

    if (is_array($result)) {

      // The menu system doesn't support having two otherwise identical paths

      // with different placeholders. So we want to remove the existing items

      // from the menu whose paths would conflict with ours. First, we must find

      // any existing menu items that may conflict. We use a regular expression

      // because we don't know what placeholders they might use. Note that we

      // first construct the regex itself by replacing %views_arg in the display

      // path, then we use this constructed regex (which will be something like

      // '#^(foo/%[^/]*/bar)$#') to search through the existing paths.

      $regex = '#^(' . preg_replace('#%views_arg#', '%[^/]*', implode('|', array_keys($result))) . ')$#';

      $matches = preg_grep($regex, array_keys($callbacks));

      // Remove any conflicting items that were found.

      foreach ($matches as $path) {

        // Don't remove the paths we just added!

        if (!isset($our_paths[$path])) {

          unset($callbacks[$path]);

        }

      }

      foreach ($result as $path => $item) {

        if (!isset($callbacks[$path])) {

          // Add a new item, possibly replacing (and thus effectively

          // overriding) one that we removed above.

          $callbacks[$path] = $item;

        }

        else {

          // This item already exists, so it must be one that we added.

          // We change the various callback arguments to pass an array

          // of possible display IDs instead of a single ID.

          $callbacks[$path]['page arguments'][1] = (array) $callbacks[$path]['page arguments'][1];

          $callbacks[$path]['page arguments'][1][] = $display_id;

          $callbacks[$path]['access arguments'][] = $item['access arguments'][0];

          $callbacks[$path]['load arguments'][1] = (array) $callbacks[$path]['load arguments'][1];

          $callbacks[$path]['load arguments'][1][] = $display_id;

        }

        $our_paths[$path] = TRUE;

      }

    }

  }

  // Save memory: Destroy those views.

  foreach ($views as $data) {

    list($view, $display_id) = $data;

    $view->destroy();

  }

}

/**

 * Load a views argument.

 *

 * Helper function for menu loading. This will automatically be

 * called in order to 'load' a views argument; primarily it

 * will be used to perform validation.

 *

 * @param string $value

 *   The actual value passed.

 * @param string $name

 *   The name of the view. This needs to be specified in the 'load function'

 *   of the menu entry.

 * @param string $display_id

 *   The display id that will be loaded for this menu item.

 * @param int $index

 *   The menu argument index. This counts from 1.

 */

function views_arg_load($value, $name, $display_id, $index) {

  static $views = array();

  $display_ids = is_array($display_id) ? $display_id : array($display_id);

  $display_id = reset($display_ids);

  foreach ($display_ids as $id) {

    // Make sure we haven't already loaded this views argument for a similar

    // menu item elsewhere. Since access is always checked for the current user,

    // we are sure that the static cache contains valid entries.

    $key = $name . ':' . $id . ':' . $value . ':' . $index;

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

      return $views[$key];

    }

    // Lazy load the view object to avoid unnecessary work.

    if (!isset($view)) {

      $view = views_get_view($name);

    }

    // Pick the first display we have access to.

    if ($view && count($display_ids) > 1 && $view->access($id)) {

      $display_id = $id;

      break;

    }

  }

  if ($view) {

    $view->set_display($display_id);

    $view->init_handlers();

    $ids = array_keys($view->argument);

    $indexes = array();

    $path = explode('/', $view->get_path());

    foreach ($path as $id => $piece) {

      if ($piece == '%' && !empty($ids)) {

        $indexes[$id] = array_shift($ids);

      }

    }

    if (isset($indexes[$index])) {

      if (isset($view->argument[$indexes[$index]])) {

        $arg = $view->argument[$indexes[$index]]->validate_argument($value) ? $value : FALSE;

        $view->destroy();

        // Store the output in case we load this same menu item again.

        $views[$key] = $arg;

        return $arg;

      }

    }

    $view->destroy();

  }

}

/**

 * Page callback: Displays a page view, given a name and display id.

 *

 * @param string $name

 *   The name of a view.

 * @param string $display_id

 *   The display id of a view.

 *

 * @return string|int

 *   Either the HTML of a fully-executed view, or MENU_NOT_FOUND.

 */

function views_page($name, $display_id) {

  $args = func_get_args();

  // Remove $name and $display_id from the arguments.

  array_shift($args);

  array_shift($args);

  // Load the view and render it.

  if ($view = views_get_view($name)) {

    return $view->execute_display($display_id, $args);

  }

  // Fallback; if we get here no view was found or handler was not valid.

  return MENU_NOT_FOUND;

}

/**

 * Implements hook_page_alter().

 */

function views_page_alter(&$page) {

  // If the main content of this page contains a view, attach its contextual

  // links to the overall page array. This allows them to be rendered directly

  // next to the page title.

  $view = views_get_page_view();

  if (!empty($view)) {

    // If a module is still putting in the display like we used to, catch that.

    if (is_subclass_of($view, 'views_plugin_display')) {

      $view = $view->view;

    }

    views_add_contextual_links($page, 'page', $view, $view->current_display);

  }

}

/**

 * Implements MODULE_preprocess_HOOK() for html.tpl.php.

 */

function views_preprocess_html(&$variables) {

  // If the page contains a view as its main content, contextual links may have

  // been attached to the page as a whole; for example, by views_page_alter().

  // This allows them to be associated with the page and rendered by default

  // next to the page title (which we want). However, it also causes the

  // Contextual Links module to treat the wrapper for the entire page (i.e.,

  // the <body> tag) as the HTML element that these contextual links are

  // associated with. This we don't want; for better visual highlighting, we

  // prefer a smaller region to be chosen. The region we prefer differs from

  // theme to theme and depends on the details of the theme's markup in

  // page.tpl.php, so we can only find it using JavaScript. We therefore remove

  // the "contextual-links-region" class from the <body> tag here and add

  // JavaScript that will insert it back in the correct place.

  if (!empty($variables['page']['#views_contextual_links_info'])) {

    $key = array_search('contextual-links-region', $variables['classes_array']);

    if ($key !== FALSE) {

      $variables['classes_array'] = array_diff($variables['classes_array'], array('contextual-links-region'));

      // Add the JavaScript, with a group and weight such that it will run

      // before modules/contextual/contextual.js.

      drupal_add_js(drupal_get_path('module', 'views') . '/js/views-contextual.js', array('group' => JS_LIBRARY, 'weight' => -1));

    }

  }

}

/**

 * Implements hook_preprocess_HOOK() for page.tpl.php.

 */

function views_preprocess_page(&$variables) {

  // If the page contains a view as its main content, contextual links may have

  // been attached to the page as a whole; for example, by views_page_alter().

  // This allows them to be associated with the page and rendered by default

  // next to the page title (which we want). However, it also causes the

  // Contextual Links module to treat the wrapper for the entire page (i.e.,

  // the <body> tag) as the HTML element that these contextual links are

  // associated with. This we don't want; for better visual highlighting, we

  // prefer a smaller region to be chosen. The region we prefer differs from

  // theme to theme and depends on the details of the theme's markup in

  // page.tpl.php, so we can only find it using JavaScript. We therefore remove

  // the "contextual-links-region" class from the <body> tag here and add

  // JavaScript that will insert it back in the correct place.

  if (!empty($variables['page']['#views_contextual_links_info'])) {

    $variables['classes_array'] = array_diff($variables['classes_array'], array('contextual-links-region'));

  }

}

/**

 * Implements hook_contextual_links_view_alter().

 */

function views_contextual_links_view_alter(&$element, $items) {

  // If we are rendering views-related contextual links attached to the overall

  // page array, add a class to the list of contextual links. This will be used

  // by the JavaScript added in views_preprocess_html().

  if (!empty($element['#element']['#views_contextual_links_info']) && !empty($element['#element']['#type']) && $element['#element']['#type'] == 'page') {

    $element['#attributes']['class'][] = 'views-contextual-links-page';

  }

}

/**

 * Implements hook_block_info().

 */

function views_block_info() {

  // Try to avoid instantiating all the views just to get the blocks info.

  views_include('cache');

  $cache = views_cache_get('views_block_items', TRUE);

  if ($cache && is_array($cache->data)) {

    return $cache->data;

  }

  $items = array();

  $views = views_get_all_views();

  foreach ($views as $view) {

    // Disabled views get nothing.

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

      continue;

    }

    $view->init_display();

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

      if (isset($display->handler) && !empty($display->handler->definition['uses hook block'])) {

        $result = $display->handler->execute_hook_block_list();

        if (is_array($result)) {

          $items = array_merge($items, $result);

        }

      }

      if (isset($display->handler) && $display->handler->get_option('exposed_block')) {

        $result = $display->handler->get_special_blocks();

        if (is_array($result)) {

          $items = array_merge($items, $result);

        }

      }

    }

  }

  // block.module has a delta length limit of 32, but our deltas can

  // unfortunately be longer because view names can be 32 and display IDs

  // can also be 32. So for very long deltas, change to md5 hashes.

  $hashes = array();

  // Get the keys because we're modifying the array and we don't want to

  // confuse PHP too much.

  $keys = array_keys($items);

  foreach ($keys as $delta) {

    if (strlen($delta) >= 32) {

      $hash = md5($delta);

      $hashes[$hash] = $delta;

      $items[$hash] = $items[$delta];

      unset($items[$delta]);

    }

  }

  // Only save hashes if they have changed.

  $old_hashes = variable_get('views_block_hashes', array());

  if ($hashes != $old_hashes) {

    variable_set('views_block_hashes', $hashes);

  }

  // Save memory: Destroy those views.

  foreach ($views as $view) {

    $view->destroy();

  }

  views_cache_set('views_block_items', $items, TRUE);

  return $items;

}

/**

 * Implements hook_block_view().

 */

function views_block_view($delta) {

  // If this is 32, this should be an md5 hash.

  if (strlen($delta) == 32) {

    $hashes = variable_get('views_block_hashes', array());

    if (!empty($hashes[$delta])) {

      $delta = $hashes[$delta];

    }

  }

  // This indicates it's a special one.

  if (substr($delta, 0, 1) == '-') {

    list($nothing, $type, $name, $display_id) = explode('-', $delta);

    // Put the - back on.

    $type = '-' . $type;

    if ($view = views_get_view($name)) {

      if ($view->access($display_id)) {

        $view->set_display($display_id);

        if (isset($view->display_handler)) {

          $output = $view->display_handler->view_special_blocks($type);

          // Before returning the block output, convert it to a renderable

          // array with contextual links.

          views_add_block_contextual_links($output, $view, $display_id, 'special_block_' . $type);

          $view->destroy();

          return $output;

        }

      }

      $view->destroy();

    }

  }

  // If the delta doesn't contain valid data return nothing.

  $explode = explode('-', $delta);

  if (count($explode) != 2) {

    return;

  }

  list($name, $display_id) = $explode;

  // Load the view.

  if ($view = views_get_view($name)) {

    if ($view->access($display_id)) {

      $output = $view->execute_display($display_id);

      // Before returning the block output, convert it to a renderable array

      // with contextual links.

      views_add_block_contextual_links($output, $view, $display_id);

      $view->destroy();

      return $output;

    }

    $view->destroy();

  }

}

/**

 * Converts Views block content to a renderable array with contextual links.

 *

 * @param array $block

 *   An array representing the block, with the same structure as the return

 *   value of hook_block_view(). This will be modified so as to force

 *   $block['content'] to be a renderable array, containing the optional

 *   '#contextual_links' property (if there are any contextual links associated

 *   with the block).

 * @param object $view

 *   The view that was used to generate the block content.

 * @param string $display_id

 *   The ID of the display within the view that was used to generate the block

 *   content.

 * @param string $block_type

 *   The type of the block. If it's block it's a regular views display,

 *   but 'special_block_-exp' exist as well.

 */

function views_add_block_contextual_links(&$block, $view, $display_id, $block_type = 'block') {

  // Do not add contextual links to an empty block.

  if (!empty($block['content'])) {

    // Contextual links only work on blocks whose content is a renderable

    // array, so if the block contains a string of already-rendered markup,

    // convert it to an array.

    if (is_string($block['content'])) {

      $block['content'] = array('#markup' => $block['content']);

    }

    // Add the contextual links.

    views_add_contextual_links($block['content'], $block_type, $view, $display_id);

  }

}

/**

 * Adds contextual links associated with a view display to a renderable array.

 *

 * This function should be called when a view is being rendered in a particular

 * location and you want to attach the appropriate contextual links (e.g.,

 * links for editing the view) to it.

 *

 * The function operates by checking the view's display plugin to see if it has

 * defined any contextual links that are intended to be displayed in the

 * requested location; if so, it attaches them. The contextual links intended

 * for a particular location are defined by the 'contextual links' and

 * 'contextual links locations' properties in hook_views_plugins() and

 * hook_views_plugins_alter(); as a result, these hook implementations have

 * full control over where and how contextual links are rendered for each

 * display.

 *

 * In addition to attaching the contextual links to the passed-in array (via

 * the standard #contextual_links property), this function also attaches

 * additional information via the #views_contextual_links_info property. This

 * stores an array whose keys are the names of each module that provided

 * views-related contextual links (same as the keys of the #contextual_links

 * array itself) and whose values are themselves arrays whose keys ('location',

 * 'view_name', and 'view_display_id') store the location, name of the view,

 * and display ID that were passed in to this function. This allows you to

 * access information about the contextual links and how they were generated in

 * a variety of contexts where you might be manipulating the renderable array

 * later on (for example, alter hooks which run later during the same page

 * request).

 *

 * @param array $render_element

 *   The renderable array to which contextual links will be added. This array

 *   should be suitable for passing in to drupal_render() and will normally

 *   contain a representation of the view display whose contextual links are

 *   being requested.

 * @param string $location

 *   The location in which the calling function intends to render the view and

 *   its contextual links. The core system supports three options for this

 *   parameter:

 *   - 'block': Used when rendering a block which contains a view. This

 *     retrieves any contextual links intended to be attached to the block

 *     itself.

 *   - 'page': Used when rendering the main content of a page which contains a

 *     view. This retrieves any contextual links intended to be attached to the

 *     page itself (for example, links which are displayed directly next to the

 *     page title).

 *   - 'view': Used when rendering the view itself, in any context. This

 *     retrieves any contextual links intended to be attached directly to the

 *     view.

 *   If you are rendering a view and its contextual links in another location,

 *   you can pass in a different value for this parameter. However, you will

 *   also need to use hook_views_plugins() or hook_views_plugins_alter() to

 *   declare, via the 'contextual links locations' array key, which view

 *   displays support having their contextual links rendered in the location

 *   you have defined.

 * @param object $view

 *   The view whose contextual links will be added.

 * @param string $display_id

 *   The ID of the display within $view whose contextual links will be added.

 *

 * @see hook_views_plugins()

 * @see views_block_view()

 * @see views_page_alter()

 * @see template_preprocess_views_view()

 */

function views_add_contextual_links(&$render_element, $location, $view, $display_id) {

  // Do not do anything if the view is configured to hide its administrative

  // links.

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

    // Also do not do anything if the display plugin has not defined any

    // contextual links that are intended to be displayed in the requested

    // location.

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

    // If contextual links locations are not set, provide a sane default. (To

    // avoid displaying any contextual links at all, a display plugin can still

    // set 'contextual links locations' to, e.g., an empty array).

    $plugin += array('contextual links locations' => array('view'));

    // On exposed_forms blocks contextual links should always be visible.

    $plugin['contextual links locations'][] = 'special_block_-exp';

    $has_links = !empty($plugin['contextual links']) && !empty($plugin['contextual links locations']);

    if ($has_links && in_array($location, $plugin['contextual links locations'])) {

      foreach ($plugin['contextual links'] as $module => $link) {

        $args = array();

        $valid = TRUE;

        if (!empty($link['argument properties'])) {

          foreach ($link['argument properties'] as $property) {

            // If the plugin is trying to create an invalid contextual link

            // (for example, "path/to/{$view->property}", where $view->property

            // does not exist), we cannot construct the link, so we skip it.

            if (!property_exists($view, $property)) {

              $valid = FALSE;

              break;

            }

            else {

              $args[] = $view->{$property};

            }

          }

        }

        // If the link was valid, attach information about it to the renderable

        // array.

        if ($valid) {

          $render_element['#contextual_links'][$module] = array($link['parent path'], $args);

          $render_element['#views_contextual_links_info'][$module] = array(

            'location' => $location,

            'view' => $view,

            'view_name' => $view->name,

            'view_display_id' => $display_id,

          );

        }

      }

    }

  }

}

/**

 * Returns an array of language names.

 *

 * This is a one to one copy of locale_language_list because we can't rely on

 * enabled locale module.

 *

 * @param string $field

 *   Either 'name' for localized names in current language or 'native' for

 *   native names.

 * @param bool $all

 *   Boolean to return all languages or only enabled ones.

 *

 * @see locale_language_list()

 */

function views_language_list($field = 'name', $all = FALSE) {

  if ($all) {

    $languages = language_list();

  }

  else {

    $languages = language_list('enabled');

    $languages = $languages[1];

  }

  $list = array();

  foreach ($languages as $language) {

    $list[$language->language] = ($field == 'name') ? t($language->name) : $language->$field;

  }

  return $list;

}

/**

 * Implements hook_flush_caches().

 */

function views_flush_caches() {

  return array('cache_views', 'cache_views_data');

}

/**

 * Implements hook_field_create_instance().

 */

function views_field_create_instance($instance) {

  cache_clear_all('*', 'cache_views', TRUE);

  cache_clear_all('*', 'cache_views_data', TRUE);

}

/**

 * Implements hook_field_update_instance().

 */

function views_field_update_instance($instance, $prior_instance) {

  cache_clear_all('*', 'cache_views', TRUE);

  cache_clear_all('*', 'cache_views_data', TRUE);

}

/**

 * Implements hook_field_delete_instance().

 */

function views_field_delete_instance($instance) {

  cache_clear_all('*', 'cache_views', TRUE);

  cache_clear_all('*', 'cache_views_data', TRUE);

}

/**

 * Invalidate the views cache, forcing a rebuild on the next grab of table data.

 *

 * @param string $cid

 *   The cache identifier we want to clear. If no given, it will default to '*'

 *   which will clear the entire cache_views bin.

 */

function views_invalidate_cache($cid = '*') {

  // Clear the views cache.

  cache_clear_all($cid, 'cache_views', TRUE);

  // Clear the page and block cache.

  cache_clear_all();

  // Set the menu as needed to be rebuilt.

  variable_set('menu_rebuild_needed', TRUE);

  // Allow modules to respond to the Views cache being cleared.

  module_invoke_all('views_invalidate_cache', $cid);

}

/**

 * Access callback to determine if the user can import Views.

 *

 * View imports require an additional access check because they are PHP

 * code and PHP is more locked down than administer views.

 */

function views_import_access() {

  return user_access('administer views') && user_access('use PHP for settings');

}

/**

 * Determine if the logged in user has access to a view.

 *

 * This function should only be called from a menu hook or some other

 * embedded source. Each argument is the result of a call to

 * views_plugin_access::get_access_callback() which is then used

 * to determine if that display is accessible. If *any* argument

 * is accessible, then the view is accessible.

 */

function views_access() {

  $args = func_get_args();

  foreach ($args as $arg) {

    if ($arg === TRUE) {

      return TRUE;

    }

    if (!is_array($arg)) {

      continue;

    }

    list($callback, $arguments) = $arg;

    $arguments = $arguments ? $arguments : array();

    // Bring dynamic arguments to the access callback.

    foreach ($arguments as $key => $value) {

      if (is_int($value) && isset($args[$value])) {

        $arguments[$key] = $args[$value];

      }

    }

    if (function_exists($callback) && call_user_func_array($callback, $arguments)) {

      return TRUE;

    }

  }

  return FALSE;

}

/**

 * Access callback for the views_plugin_access_perm access plugin.

 *

 * Determine if the specified user has access to a view on the basis of

 * permissions. If the $account argument is omitted, the current user

 * is used.

 */

function views_check_perm($perms, $account = NULL) {

  // Backward compatibility to ensure also a single permission string is

  // properly processed.

  $perms = is_array($perms) ? $perms : array($perms);

  if (user_access('access all views', $account)) {

    return TRUE;

  }

  // Perms are handled as OR, as soon one permission allows access TRUE is

  // returned.

  foreach ($perms as $perm) {

    if (user_access($perm, $account)) {

      return TRUE;

    }

  }

  return FALSE;

}

/**

 * Access callback for the views_plugin_access_role access plugin.

 *

 * Determine if the specified user has access to a view on the basis of any of

 * the requested roles. If the $account argument is omitted, the current user

 * is used.

 */

function views_check_roles($rids, $account = NULL) {

  global $user;

  $account = isset($account) ? $account : $user;

  $roles = array_keys($account->roles);

  $roles[] = $account->uid ? DRUPAL_AUTHENTICATED_RID : DRUPAL_ANONYMOUS_RID;

  return user_access('access all views', $account) || array_intersect(array_filter($rids), $roles);

}

/**

 * Set page view.

 *

 * Set the current 'page view' that is being displayed so that it is easy

 * for other modules or the theme to identify.

 */

function &views_set_page_view($view = NULL) {

  static $cache = NULL;

  if (isset($view)) {

    $cache = $view;

  }

  return $cache;

}

/**

 * Get page view.

 *

 * Find out what, if any, page view is currently in use. Please note that

 * this returns a reference, so be careful! You can unintentionally modify the

 * $view object.

 *

 * @return view

 *   A fully formed, empty $view object.

 */

function &views_get_page_view() {

  return views_set_page_view();

}

/**

 * Set current view.

 *

 * Set the current 'current view' that is being built/rendered so that it is

 * easy for other modules or items in drupal_eval to identify.

 *

 * @return view

 *   The current view.

 */

function &views_set_current_view($view = NULL) {

  static $cache = NULL;

  if (isset($view)) {

    $cache = $view;

  }

  return $cache;

}

/**

 * Get current view.

 *

 * Find out what, if any, current view is currently in use. Please note that

 * this returns a reference, so be careful! You can unintentionally modify the

 * $view object.

 *

 * @return view

 *   The current view.

 */

function &views_get_current_view() {

  return views_set_current_view();

}

/**

 * Include views .inc files as necessary.

 */

function views_include($file) {

  static $views_path;

  if (!isset($views_path)) {

    $views_path = DRUPAL_ROOT . '/' . drupal_get_path('module', 'views');

  }

  include_once $views_path . '/includes/' . $file . '.inc';

}

/**

 * Load views files on behalf of modules.

 */

function views_module_include($api, $reset = FALSE) {

  if ($reset) {

    $cache = &drupal_static('ctools_plugin_api_info');

    if (isset($cache['views']['views'])) {

      unset($cache['views']['views']);

    }

  }

  ctools_include('plugins');

  return ctools_plugin_api_include('views', $api, views_api_minimum_version(), views_api_version());

}

/**

 * Get a list of modules that support the current views API.

 */

function views_get_module_apis($api = 'views', $reset = FALSE) {

  if ($reset) {

    $cache = &drupal_static('ctools_plugin_api_info');

    if (isset($cache['views']['views'])) {

      unset($cache['views']['views']);

    }

  }

  ctools_include('plugins');

  return ctools_plugin_api_info('views', $api, views_api_minimum_version(), views_api_version());

}

/**

 * Include views .css files.

 */

function views_add_css($file) {

  // We set preprocess to FALSE because we are adding the files conditionally,

  // and we don't want to generate duplicate cache files.

  // @todo at some point investigate adding some files unconditionally and

  // allowing preprocess.

  drupal_add_css(drupal_get_path('module', 'views') . "/css/$file.css", array('preprocess' => FALSE));

}

/**

 * Include views .js files.

 */

function views_add_js($file) {

  // If javascript has been disabled by the user, never add js files.

  if (variable_get('views_no_javascript', FALSE)) {

    return;

  }

  static $base = TRUE, $ajax = TRUE;

  if ($base) {

    drupal_add_js(drupal_get_path('module', 'views') . "/js/base.js");

    $base = FALSE;

  }

  if ($ajax && in_array($file, array('ajax', 'ajax_view'))) {

    drupal_add_library('system', 'drupal.ajax');

    drupal_add_library('system', 'jquery.form');

    $ajax = FALSE;

  }

  ctools_add_js($file, 'views');

}

/**

 * Load views files on behalf of modules.

 */

function views_include_handlers($reset = FALSE) {

  static $finished = FALSE;

  // Ensure this only gets run once.

  if ($finished && !$reset) {

    return;

  }

  views_include('base');

  views_include('handlers');

  views_include('cache');

  views_include('plugins');

  views_module_include('views', $reset);

  $finished = TRUE;

}

/**

 * Fetch a handler from the data cache.

 *

 * @param string $table

 *   The name of the table this handler is from.

 * @param string $field

 *   The name of the field this handler is from.

 * @param string $key

 *   The type of handler. i.e, sort, field, argument, filter, relationship.

 * @param mixed $override

 *   Override the actual handler object with this class. Used for aggregation

 *   when the handler is redirected to the aggregation handler.

 *

 * @return views_handler

 *   An instance of a handler object. May be views_handler_broken.

 */

function views_get_handler($table, $field, $key, $override = NULL) {

  static $recursion_protection = array();

  $data = views_fetch_data($table, FALSE);

  $handler = NULL;

  views_include('handlers');

  // Support conversion on table level.

  if (isset($data['moved to'])) {

    $moved = array($data['moved to'], $field);

  }

  // Support conversion on datafield level.

  if (isset($data[$field]['moved to'])) {

    $moved = $data[$field]['moved to'];

  }

  // Support conversion on handler level.

  if (isset($data[$field][$key]['moved to'])) {

    $moved = $data[$field][$key]['moved to'];

  }

  if (isset($data[$field][$key]) || !empty($moved)) {

    if (!empty($moved)) {

      list($moved_table, $moved_field) = $moved;

      if (!empty($recursion_protection[$moved_table][$moved_field])) {

        // Recursion detected!

        return NULL;

      }

      $recursion_protection[$moved_table][$moved_field] = TRUE;

      $handler = views_get_handler($moved_table, $moved_field, $key, $override);

      $recursion_protection = array();

      if ($handler) {

        // Store these values so we know what we were originally called.

        $handler->original_table = $table;

        $handler->original_field = $field;

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

          $handler->actual_table = $moved_table;

          $handler->actual_field = $moved_field;

        }

      }

      return $handler;

    }

    // Set up a default handler.

    if (empty($data[$field][$key]['handler'])) {

      $data[$field][$key]['handler'] = 'views_handler_' . $key;

    }

    if ($override) {

      $data[$field][$key]['override handler'] = $override;

    }

    $handler = _views_prepare_handler($data[$field][$key], $data, $field, $key);

  }

  if ($handler) {

    return $handler;

  }

  // DEBUG -- identify missing handlers.

  $placeholders = array('@table' => $table, '@field' => $field, '@key' => $key);

  vpr("Missing handler: @table @field @key", $placeholders);

  $broken = array(

    'title' => t('Broken handler @table.@field', array('@table' => $table, '@field' => $field)),

    'handler' => 'views_handler_' . $key . '_broken',

    'table' => $table,

    'field' => $field,

  );

  return _views_create_handler($broken, 'handler', $key);

}

/**

 * Fetch Views' data from the cache.

 */

function views_fetch_data($table = NULL, $move = TRUE, $reset = FALSE) {

  views_include('cache');

  return _views_fetch_data($table, $move, $reset);

}

/**

 * Fetch the plugin data from cache.

 */

function views_fetch_plugin_data($type = NULL, $plugin = NULL, $reset = FALSE) {

  views_include('cache');

  return _views_fetch_plugin_data($type, $plugin, $reset);

}

/**

 * Fetch a list of all base tables available.

 *

 * @param string $type

 *   Either 'display', 'style' or 'row'.

 * @param string $key

 *   For style plugins, this is an optional type to restrict to. May be

 *   'normal', 'summary', 'feed' or others based on the needs of the display.

 * @param array $base

 *   An array of possible base tables.

 *

 * @return array

 *   A keyed array of in the form of 'base_table' => 'Description'.

 */

function views_fetch_plugin_names($type, $key = NULL, $base = array()) {

  $data = views_fetch_plugin_data();

  $plugins[$type] = array();

  foreach ($data[$type] as $id => $plugin) {

    // Skip plugins that don't conform to our key.

    if ($key && (empty($plugin['type']) || $plugin['type'] != $key)) {

      continue;

    }

    if (empty($plugin['no ui']) && (empty($base) || empty($plugin['base']) || array_intersect($base, $plugin['base']))) {

      $plugins[$type][$id] = $plugin['title'];

    }

  }

  if (!empty($plugins[$type])) {

    asort($plugins[$type]);

    return $plugins[$type];

  }

  // Fall-through.

  return array();

}

/**

 * Get a handler for a plugin.

 *

 * @return views_plugin

 *   The created plugin object.

 */

function views_get_plugin($type, $plugin, $reset = FALSE) {

  views_include('handlers');

  $definition = views_fetch_plugin_data($type, $plugin, $reset);

  if (!empty($definition)) {

    return _views_create_handler($definition, $type);

  }

}

/**

 * Load the current enabled localization plugin.

 *

 * @return string

 *   The name of the localization plugin.

 */

function views_get_localization_plugin() {

  $plugin = variable_get('views_localization_plugin', '');

  // Provide sane default values for the localization plugin.

  if (empty($plugin)) {

    if (module_exists('locale')) {

      $plugin = 'core';

    }

    else {

      $plugin = 'none';

    }

  }

  return $plugin;

}

/**

 * Get all view templates.

 *

 * Templates are special in-code views that are never active, but exist only

 * to be cloned into real views as though they were templates.

 */

function views_get_all_templates() {

  $templates = array();

  $modules = views_module_include('views_template');

  foreach ($modules as $module => $info) {

    $function = $module . '_views_templates';

    if (function_exists($function)) {

      $new = $function();

      if ($new && is_array($new)) {

        $templates = array_merge($new, $templates);

      }

    }

  }

  return $templates;

}

/**

 * Create an empty view to work with.

 *

 * @return view

 *   A fully formed, empty $view object. This object must be populated before

 *   it can be successfully saved.

 */

function views_new_view() {

  views_include('view');

  $view = new view();

  $view->vid = 'new';

  $view->add_display('default');

  return $view;

}

/**

 * Get applicable views.

 *

 * Return a list of all views and display IDs that have a particular setting in

 * their display's plugin settings.

 *

 * @return array

 *   An array with the following structure.

 *   array(

 *     array($view, $display_id),

 *     array($view, $display_id),

 *   );

 */

function views_get_applicable_views($type) {

  // @todo Use a smarter flagging system so that we don't have to

  // load every view for this.

  $result = array();

  $views = views_get_all_views();

  foreach ($views as $view) {

    // Skip disabled views.

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

      continue;

    }

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

      // Skip this view as it is broken.

      vsm(t("Skipping broken view @view", array('@view' => $view->name)));

      continue;

    }

    // Loop on array keys because something seems to muck with $view->display

    // a bit in PHP4.

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

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

      if (!empty($plugin[$type])) {

        // This view uses hook menu. Clone it so that different handlers

        // don't trip over each other, and add it to the list.

        $v = $view->clone_view();

        if ($v->set_display($id) && $v->display_handler->get_option('enabled')) {

          $result[] = array($v, $id);

        }

        // In PHP 4.4.7 and presumably earlier, if we do not unset $v

        // here, we will find that it actually overwrites references

        // possibly due to shallow copying issues.

        unset($v);

      }

    }

  }

  return $result;

}

/**

 * Return an array of all views as fully loaded $view objects.

 *

 * @param bool $reset

 *   If TRUE, reset the static cache forcing views to be reloaded.

 */

function views_get_all_views($reset = FALSE) {

  ctools_include('export');

  return ctools_export_crud_load_all('views_view', $reset);

}

/**

 * Returns an array of all enabled views, as fully loaded $view objects.

 */

function views_get_enabled_views() {

  $views = views_get_all_views();

  return array_filter($views, 'views_view_is_enabled');

}

/**

 * Returns an array of all disabled views, as fully loaded $view objects.

 */

function views_get_disabled_views() {

  $views = views_get_all_views();

  return array_filter($views, 'views_view_is_disabled');

}

/**

 * Get options array.

 *

 * Return an array of view as options array, that can be used by select,

 * checkboxes and radios as #options.

 *

 * @param bool $views_only

 *   If TRUE, only return views, not displays.

 * @param string $filter

 *   Filters the views on status. Can either be 'all' (default), 'enabled' or

 *   'disabled'.

 * @param mixed $exclude_view