EDIT

<?php

/**

 * @file

 * Contains functions to alter Drupal's markup for the Zen theme.

 *

 * IMPORTANT WARNING: DO NOT MODIFY THIS FILE.

 *

 * The base Zen theme is designed to be easily extended by its sub-themes. You

 * shouldn't modify this or any of the CSS or PHP files in the root zen/ folder.

 * See the online documentation for more information:

 *   https://drupal.org/documentation/theme/zen

 */

// Auto-rebuild the theme registry during theme development.

if (theme_get_setting('zen_rebuild_registry') && !defined('MAINTENANCE_MODE')) {

  // Rebuild .info data.

  system_rebuild_theme_data();

  // Rebuild theme registry.

  drupal_theme_rebuild();

}

/**

 * Implements HOOK_theme().

 */

function zen_theme(&$existing, $type, $theme, $path) {

  include_once './' . drupal_get_path('theme', 'zen') . '/zen-internals/template.theme-registry.inc';

  return _zen_theme($existing, $type, $theme, $path);

}

/**

 * Return a themed breadcrumb trail.

 *

 * @param $variables

 *   - title: An optional string to be used as a navigational heading to give

 *     context for breadcrumb links to screen-reader users.

 *   - title_attributes_array: Array of HTML attributes for the title. It is

 *     flattened into a string within the theme function.

 *   - breadcrumb: An array containing the breadcrumb links.

 * @return

 *   A string containing the breadcrumb output.

 */

function zen_breadcrumb($variables) {

  $breadcrumb = $variables['breadcrumb'];

  $output = '';

  // Determine if we are to display the breadcrumb.

  $show_breadcrumb = theme_get_setting('zen_breadcrumb');

  if ($show_breadcrumb == 'yes' || $show_breadcrumb == 'admin' && arg(0) == 'admin') {

    // Optionally get rid of the homepage link.

    $show_breadcrumb_home = theme_get_setting('zen_breadcrumb_home');

    if (!$show_breadcrumb_home) {

      array_shift($breadcrumb);

    }

    // Return the breadcrumb with separators.

    if (!empty($breadcrumb)) {

      $breadcrumb_separator = filter_xss_admin(theme_get_setting('zen_breadcrumb_separator'));

      $trailing_separator = $title = '';

      if (theme_get_setting('zen_breadcrumb_title')) {

        $item = menu_get_item();

        if (!empty($item['tab_parent'])) {

          // If we are on a non-default tab, use the tab's title.

          $breadcrumb[] = check_plain($item['title']);

        }

        else {

          $breadcrumb[] = drupal_get_title();

        }

      }

      elseif (theme_get_setting('zen_breadcrumb_trailing')) {

        $trailing_separator = $breadcrumb_separator;

      }

      // Provide a navigational heading to give context for breadcrumb links to

      // screen-reader users.

      if (empty($variables['title'])) {

        $variables['title'] = t('You are here');

      }

      // Unless overridden by a preprocess function, make the heading invisible.

      if (!isset($variables['title_attributes_array']['class'])) {

        $variables['title_attributes_array']['class'][] = 'element-invisible';

      }

      // Build the breadcrumb trail.

      $output = '<nav class="breadcrumb" role="navigation">';

      $output .= '<h2' . drupal_attributes($variables['title_attributes_array']) . '>' . $variables['title'] . '</h2>';

      $output .= '<ol><li>' . implode($breadcrumb_separator . '</li><li>', $breadcrumb) . $trailing_separator . '</li></ol>';

      $output .= '</nav>';

    }

  }

  return $output;

}

/**

 * Override or insert variables into the html template.

 *

 * @param $variables

 *   An array of variables to pass to the theme template.

 * @param $hook

 *   The name of the template being rendered. This is usually "html", but can

 *   also be "maintenance_page" since zen_preprocess_maintenance_page() calls

 *   this function to have consistent variables.

 */

function zen_preprocess_html(&$variables, $hook) {

  // Add variables and paths needed for HTML5 and responsive support.

  $variables['base_path'] = base_path();

  $variables['path_to_zen'] = drupal_get_path('theme', 'zen');

  // Get settings for HTML5 and responsive support. array_filter() removes

  // items from the array that have been disabled.

  $html5_respond_meta = array_filter((array) theme_get_setting('zen_html5_respond_meta'));

  $variables['add_respond_js']          = in_array('respond', $html5_respond_meta);

  $variables['add_html5_shim']          = in_array('html5', $html5_respond_meta);

  $variables['default_mobile_metatags'] = in_array('meta', $html5_respond_meta);

  // If the user is silly and enables Zen as the theme, add some styles.

  if ($GLOBALS['theme'] == 'zen') {

    include_once './' . $variables['path_to_zen'] . '/zen-internals/template.zen.inc';

    _zen_preprocess_html($variables, $hook);

  }

  // Attributes for html element.

  $variables['html_attributes_array'] = array(

    'lang' => $variables['language']->language,

    'dir' => $variables['language']->dir,

  );

  // Send X-UA-Compatible HTTP header to force IE to use the most recent

  // rendering engine or use Chrome's frame rendering engine if available.

  // This also prevents the IE compatibility mode button to appear when using

  // conditional classes on the html tag.

  if (is_null(drupal_get_http_header('X-UA-Compatible'))) {

    drupal_add_http_header('X-UA-Compatible', 'IE=edge,chrome=1');

  }

  $variables['skip_link_anchor'] = check_plain(theme_get_setting('zen_skip_link_anchor'));

  $variables['skip_link_text']   = check_plain(theme_get_setting('zen_skip_link_text'));

  // Return early, so the maintenance page does not call any of the code below.

  if ($hook != 'html') {

    return;

  }

  // Serialize RDF Namespaces into an RDFa 1.1 prefix attribute.

  if ($variables['rdf_namespaces']) {

    $prefixes = array();

    foreach (explode("\n  ", ltrim($variables['rdf_namespaces'])) as $namespace) {

      // Remove xlmns: and ending quote and fix prefix formatting.

      $prefixes[] = str_replace('="', ': ', substr($namespace, 6, -1));

    }

    $variables['rdf_namespaces'] = ' prefix="' . implode(' ', $prefixes) . '"';

  }

  // Classes for body element. Allows advanced theming based on context

  // (home page, node of certain type, etc.)

  if (!$variables['is_front']) {

    // Add unique class for each page.

    $path = drupal_get_path_alias($_GET['q']);

    // Add unique class for each website section.

    list($section, ) = explode('/', $path, 2);

    $arg = explode('/', $_GET['q']);

    if ($arg[0] == 'node' && isset($arg[1])) {

      if ($arg[1] == 'add') {

        $section = 'node-add';

      }

      elseif (isset($arg[2]) && is_numeric($arg[1]) && ($arg[2] == 'edit' || $arg[2] == 'delete')) {

        $section = 'node-' . $arg[2];

      }

    }

    $variables['classes_array'][] = drupal_html_class('section-' . $section);

  }

  if (theme_get_setting('zen_wireframes')) {

    $variables['classes_array'][] = 'with-wireframes'; // Optionally add the wireframes style.

  }

  // Store the menu item since it has some useful information.

  $variables['menu_item'] = menu_get_item();

  if ($variables['menu_item']) {

    switch ($variables['menu_item']['page_callback']) {

      case 'views_page':

        // Is this a Views page?

        $variables['classes_array'][] = 'page-views';

        break;

      case 'page_manager_blog':

      case 'page_manager_blog_user':

      case 'page_manager_contact_site':

      case 'page_manager_contact_user':

      case 'page_manager_node_add':

      case 'page_manager_node_edit':

      case 'page_manager_node_view_page':

      case 'page_manager_page_execute':

      case 'page_manager_poll':

      case 'page_manager_search_page':

      case 'page_manager_term_view_page':

      case 'page_manager_user_edit_page':

      case 'page_manager_user_view_page':

        // Is this a Panels page?

        $variables['classes_array'][] = 'page-panels';

        break;

    }

  }

}

/**

 * Override or insert variables into the html templates.

 *

 * @param $variables

 *   An array of variables to pass to the theme template.

 * @param $hook

 *   The name of the template being rendered ("html" in this case.)

 */

function zen_process_html(&$variables, $hook) {

  // Flatten out html_attributes.

  $variables['html_attributes'] = drupal_attributes($variables['html_attributes_array']);

}

/**

 * Override or insert variables in the html_tag theme function.

 */

function zen_process_html_tag(&$variables) {

  $tag = &$variables['element'];

  if ($tag['#tag'] == 'style' || $tag['#tag'] == 'script') {

    // Remove redundant type attribute and CDATA comments.

    unset($tag['#attributes']['type'], $tag['#value_prefix'], $tag['#value_suffix']);

    // Remove media="all" but leave others unaffected.

    if (isset($tag['#attributes']['media']) && $tag['#attributes']['media'] === 'all') {

      unset($tag['#attributes']['media']);

    }

  }

}

/**

 * Implement hook_html_head_alter().

 */

function zen_html_head_alter(&$head) {

  // Simplify the meta tag for character encoding.

  if (isset($head['system_meta_content_type']['#attributes']['content'])) {

    $head['system_meta_content_type']['#attributes'] = array('charset' => str_replace('text/html; charset=', '', $head['system_meta_content_type']['#attributes']['content']));

  }

}

/**

 * Override or insert variables into the page template.

 *

 * @param $variables

 *   An array of variables to pass to the theme template.

 * @param $hook

 *   The name of the template being rendered ("page" in this case.)

 */

function zen_preprocess_page(&$variables, $hook) {

  // Find the title of the menu used by the secondary links.

  $secondary_links = variable_get('menu_secondary_links_source', 'user-menu');

  if ($secondary_links) {

    $menus = function_exists('menu_get_menus') ? menu_get_menus() : menu_list_system_menus();

    $variables['secondary_menu_heading'] = $menus[$secondary_links];

  }

  else {

    $variables['secondary_menu_heading'] = '';

  }

}

/**

 * Override or insert variables into the maintenance page template.

 *

 * @param $variables

 *   An array of variables to pass to the theme template.

 * @param $hook

 *   The name of the template being rendered ("maintenance_page" in this case.)

 */

function zen_preprocess_maintenance_page(&$variables, $hook) {

  zen_preprocess_html($variables, $hook);

  // There's nothing maintenance-related in zen_preprocess_page(). Yet.

  //zen_preprocess_page($variables, $hook);

}

/**

 * Override or insert variables into the maintenance page template.

 *

 * @param $variables

 *   An array of variables to pass to the theme template.

 * @param $hook

 *   The name of the template being rendered ("maintenance_page" in this case.)

 */

function zen_process_maintenance_page(&$variables, $hook) {

  zen_process_html($variables, $hook);

  // Ensure default regions get a variable. Theme authors often forget to remove

  // a deleted region's variable in maintenance-page.tpl.

  foreach (array('header', 'navigation', 'highlighted', 'help', 'content', 'sidebar_first', 'sidebar_second', 'footer', 'bottom') as $region) {

    if (!isset($variables[$region])) {

      $variables[$region] = '';

    }

  }

}

/**

 * Override or insert variables into the node templates.

 *

 * @param $variables

 *   An array of variables to pass to the theme template.

 * @param $hook

 *   The name of the template being rendered ("node" in this case.)

 */

function zen_preprocess_node(&$variables, $hook) {

  // Add $unpublished variable.

  $variables['unpublished'] = (!$variables['status']) ? TRUE : FALSE;

  // Add pubdate to submitted variable.

  $variables['pubdate'] = '<time pubdate datetime="' . format_date($variables['node']->created, 'custom', 'c') . '">' . $variables['date'] . '</time>';

  if ($variables['display_submitted']) {

    $variables['submitted'] = t('Submitted by !username on !datetime', array('!username' => $variables['name'], '!datetime' => $variables['pubdate']));

  }

  // Add a class for the view mode.

  if (!$variables['teaser']) {

    $variables['classes_array'][] = 'view-mode-' . $variables['view_mode'];

  }

  // Add a class to show node is authored by current user.

  if ($variables['uid'] && $variables['uid'] == $GLOBALS['user']->uid) {

    $variables['classes_array'][] = 'node-by-viewer';

  }

  $variables['title_attributes_array']['class'][] = 'node__title';

  $variables['title_attributes_array']['class'][] = 'node-title';

}

/**

 * Override or insert variables into the comment templates.

 *

 * @param $variables

 *   An array of variables to pass to the theme template.

 * @param $hook

 *   The name of the template being rendered ("comment" in this case.)

 */

function zen_preprocess_comment(&$variables, $hook) {

  // If comment subjects are disabled, don't display them.

  if (variable_get('comment_subject_field_' . $variables['node']->type, 1) == 0) {

    $variables['title'] = '';

  }

  // Add pubdate to submitted variable.

  $variables['pubdate'] = '<time pubdate datetime="' . format_date($variables['comment']->created, 'custom', 'c') . '">' . $variables['created'] . '</time>';

  $variables['submitted'] = t('!username replied on !datetime', array('!username' => $variables['author'], '!datetime' => $variables['pubdate']));

  // Zebra striping.

  if ($variables['id'] == 1) {

    $variables['classes_array'][] = 'first';

  }

  if ($variables['id'] == $variables['node']->comment_count) {

    $variables['classes_array'][] = 'last';

  }

  $variables['classes_array'][] = $variables['zebra'];

  $variables['title_attributes_array']['class'][] = 'comment__title';

  $variables['title_attributes_array']['class'][] = 'comment-title';

}

/**

 * Preprocess variables for region.tpl.php

 *

 * @param $variables

 *   An array of variables to pass to the theme template.

 * @param $hook

 *   The name of the template being rendered ("region" in this case.)

 */

function zen_preprocess_region(&$variables, $hook) {

  // Sidebar regions get some extra classes and a common template suggestion.

  if (strpos($variables['region'], 'sidebar_') === 0) {

    $variables['classes_array'][] = 'column';

    $variables['classes_array'][] = 'sidebar';

    // Allow a region-specific template to override Zen's region--sidebar.

    array_unshift($variables['theme_hook_suggestions'], 'region__sidebar');

  }

  // Use a template with no wrapper for the content region.

  elseif ($variables['region'] == 'content') {

    // Allow a region-specific template to override Zen's region--no-wrapper.

    array_unshift($variables['theme_hook_suggestions'], 'region__no_wrapper');

  }

  // Add a SMACSS-style class for header region.

  elseif ($variables['region'] == 'header') {

    array_unshift($variables['classes_array'], 'header__region');

  }

}

/**

 * Override or insert variables into the block templates.

 *

 * @param $variables

 *   An array of variables to pass to the theme template.

 * @param $hook

 *   The name of the template being rendered ("block" in this case.)

 */

function zen_preprocess_block(&$variables, $hook) {

  // Use a template with no wrapper for the page's main content.

  if ($variables['block_html_id'] == 'block-system-main') {

    $variables['theme_hook_suggestions'][] = 'block__no_wrapper';

  }

  // Classes describing the position of the block within the region.

  if ($variables['block_id'] == 1) {

    $variables['classes_array'][] = 'first';

  }

  // The last_in_region property is set in zen_page_alter().

  if (isset($variables['block']->last_in_region)) {

    $variables['classes_array'][] = 'last';

  }

  $variables['classes_array'][] = $variables['block_zebra'];

  $variables['title_attributes_array']['class'][] = 'block__title';

  $variables['title_attributes_array']['class'][] = 'block-title';

  // Add Aria Roles via attributes.

  switch ($variables['block']->module) {

    case 'system':

      switch ($variables['block']->delta) {

        case 'main':

          // Note: the "main" role goes in the page.tpl, not here.

          break;

        case 'help':

        case 'powered-by':

          $variables['attributes_array']['role'] = 'complementary';

          break;

        default:

          // Any other "system" block is a menu block.

          $variables['attributes_array']['role'] = 'navigation';

          break;

      }

      break;

    case 'menu':

    case 'menu_block':

    case 'blog':

    case 'book':

    case 'comment':

    case 'forum':

    case 'shortcut':

    case 'statistics':

      $variables['attributes_array']['role'] = 'navigation';

      break;

    case 'search':

      $variables['attributes_array']['role'] = 'search';

      break;

    case 'help':

    case 'aggregator':

    case 'locale':

    case 'poll':

    case 'profile':

      $variables['attributes_array']['role'] = 'complementary';

      break;

    case 'node':

      switch ($variables['block']->delta) {

        case 'syndicate':

          $variables['attributes_array']['role'] = 'complementary';

          break;

        case 'recent':

          $variables['attributes_array']['role'] = 'navigation';

          break;

      }

      break;

    case 'user':

      switch ($variables['block']->delta) {

        case 'login':

          $variables['attributes_array']['role'] = 'form';

          break;

        case 'new':

        case 'online':

          $variables['attributes_array']['role'] = 'complementary';

          break;

      }

      break;

  }

}

/**

 * Override or insert variables into the block templates.

 *

 * @param $variables

 *   An array of variables to pass to the theme template.

 * @param $hook

 *   The name of the template being rendered ("block" in this case.)

 */

function zen_process_block(&$variables, $hook) {

  // Drupal 7 should use a $title variable instead of $block->subject.

  $variables['title'] = isset($variables['block']->subject) ? $variables['block']->subject : '';

}

/**

 * Implements hook_page_alter().

 *

 * Look for the last block in the region. This is impossible to determine from

 * within a preprocess_block function.

 *

 * @param $page

 *   Nested array of renderable elements that make up the page.

 */

function zen_page_alter(&$page) {

  // Look in each visible region for blocks.

  foreach (system_region_list($GLOBALS['theme'], REGIONS_VISIBLE) as $region => $name) {

    if (!empty($page[$region])) {

      // Find the last block in the region.

      $blocks = array_reverse(element_children($page[$region]));

      while ($blocks && !isset($page[$region][$blocks[0]]['#block'])) {

        array_shift($blocks);

      }

      if ($blocks) {

        $page[$region][$blocks[0]]['#block']->last_in_region = TRUE;

      }

    }

  }

}

/**

 * Implements hook_form_BASE_FORM_ID_alter().

 *

 * Prevent user-facing field styling from screwing up node edit forms by

 * renaming the classes on the node edit form's field wrappers.

 */

function zen_form_node_form_alter(&$form, &$form_state, $form_id) {

  // Remove if #1245218 is backported to D7 core.

  foreach (array_keys($form) as $item) {

    if (strpos($item, 'field_') === 0) {

      if (!empty($form[$item]['#attributes']['class'])) {

        foreach ($form[$item]['#attributes']['class'] as &$class) {

          // Core bug: the field-type-text-with-summary class is used as a JS hook.

          if ($class != 'field-type-text-with-summary' && strpos($class, 'field-type-') === 0 || strpos($class, 'field-name-') === 0) {

            // Make the class different from that used in theme_field().

            $class = 'form-' . $class;

          }

        }

      }

    }

  }

}

/**

 * Returns HTML for primary and secondary local tasks.

 *

 * @ingroup themeable

 */

function zen_menu_local_tasks(&$variables) {

  $output = '';

  // Add theme hook suggestions for tab type.

  foreach (array('primary', 'secondary') as $type) {

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

      foreach (array_keys($variables[$type]) as $key) {

        if (isset($variables[$type][$key]['#theme']) && ($variables[$type][$key]['#theme'] == 'menu_local_task' || is_array($variables[$type][$key]['#theme']) && in_array('menu_local_task', $variables[$type][$key]['#theme']))) {

          $variables[$type][$key]['#theme'] = array('menu_local_task__' . $type, 'menu_local_task');

        }

      }

    }

  }

  if (!empty($variables['primary'])) {

    $variables['primary']['#prefix'] = '<h2 class="element-invisible">' . t('Primary tabs') . '</h2>';

    $variables['primary']['#prefix'] .= '<ul class="tabs-primary tabs primary">';

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

    $output .= drupal_render($variables['primary']);

  }

  if (!empty($variables['secondary'])) {

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

    $variables['secondary']['#prefix'] .= '<ul class="tabs-secondary tabs secondary">';

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

    $output .= drupal_render($variables['secondary']);

  }

  return $output;

}

/**

 * Returns HTML for a single local task link.

 *

 * @ingroup themeable

 */

function zen_menu_local_task($variables) {

  $type = $class = FALSE;

  $link = $variables['element']['#link'];

  $link_text = $link['title'];

  // Check for tab type set in zen_menu_local_tasks().

  if (is_array($variables['element']['#theme'])) {

    $type = in_array('menu_local_task__secondary', $variables['element']['#theme']) ? 'tabs-secondary' : 'tabs-primary';

  }

  // Add SMACSS-style class names.

  if ($type) {

    $link['localized_options']['attributes']['class'][] = $type . '__tab-link';

    $class = $type . '__tab';

  }

  if (!empty($variables['element']['#active'])) {

    // Add text to indicate active tab for non-visual users.

    $active = ' <span class="element-invisible">' . t('(active tab)') . '</span>';

    // If the link does not contain HTML already, check_plain() it now.

    // After we set 'html'=TRUE the link will not be sanitized by l().

    if (empty($link['localized_options']['html'])) {

      $link['title'] = check_plain($link['title']);

    }

    $link['localized_options']['html'] = TRUE;

    $link_text = t('!local-task-title!active', array('!local-task-title' => $link['title'], '!active' => $active));

    if (!$type) {

      $class = 'active';

    }

    else {

      $link['localized_options']['attributes']['class'][] = 'is-active';

      $class .= ' is-active';

    }

  }

  return '<li' . ($class ? ' class="' . $class . '"' : '') . '>' . l($link_text, $link['href'], $link['localized_options']) . "</li>\n";

}

/**

 * Implements hook_preprocess_menu_link().

 */

function zen_preprocess_menu_link(&$variables, $hook) {

  foreach ($variables['element']['#attributes']['class'] as $key => $class) {

    switch ($class) {

      // Menu module classes.

      case 'expanded':

      case 'collapsed':

      case 'leaf':

      case 'active':

      // Menu block module classes.

      case 'active-trail':

        array_unshift($variables['element']['#attributes']['class'], 'is-' . $class);

        break;

      case 'has-children':

        array_unshift($variables['element']['#attributes']['class'], 'is-parent');

        break;

    }

  }

  array_unshift($variables['element']['#attributes']['class'], 'menu__item');

  if (empty($variables['element']['#localized_options']['attributes']['class'])) {

    $variables['element']['#localized_options']['attributes']['class'] = array();

  }

  else {

    foreach ($variables['element']['#localized_options']['attributes']['class'] as $key => $class) {

      switch ($class) {

        case 'active':

        case 'active-trail':

          array_unshift($variables['element']['#localized_options']['attributes']['class'], 'is-' . $class);

          break;

      }

    }

  }

  array_unshift($variables['element']['#localized_options']['attributes']['class'], 'menu__link');

}

/**

 * Returns HTML for status and/or error messages, grouped by type.

 */

function zen_status_messages($variables) {

  $display = $variables['display'];

  $output = '';

  $status_heading = array(

    'status' => t('Status message'),

    'error' => t('Error message'),

    'warning' => t('Warning message'),

  );

  foreach (drupal_get_messages($display) as $type => $messages) {

    $output .= "<div class=\"messages--$type messages $type\">\n";

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

      $output .= '<h2 class="element-invisible">' . $status_heading[$type] . "</h2>\n";

    }

    if (count($messages) > 1) {

      $output .= " <ul class=\"messages__list\">\n";

      foreach ($messages as $message) {

        $output .= '  <li class=\"messages__item\">' . $message . "</li>\n";

      }

      $output .= " </ul>\n";

    }

    else {

      $output .= $messages[0];

    }

    $output .= "</div>\n";

  }

  return $output;

}

/**

 * Returns HTML for a marker for new or updated content.

 */

function zen_mark($variables) {

  $type = $variables['type'];

  if ($type == MARK_NEW) {

    return ' <mark class="new">' . t('new') . '</mark>';

  }

  elseif ($type == MARK_UPDATED) {

    return ' <mark class="updated">' . t('updated') . '</mark>';

  }

}

/**

 * Alters the default Panels render callback so it removes the panel separator.

 */

function zen_panels_default_style_render_region($variables) {

  return implode('', $variables['panes']);

}