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Drupal example source code file (theme.inc)

This example Drupal source code file (theme.inc) is included in the DevDaily.com "Drupal Source Code Warehouse" project. The intent of this project is to help you "Learn Drupal by Example".

PHP - Drupal tags/keywords

array, check_plain, empty, field, foreach, function, id, if, path, php, row, rows, vars, view

The theme.inc Drupal example source code

<?php
// $Id: theme.inc,v 1.84.2.14.2.1 2010/12/15 05:24:41 merlinofchaos Exp $

/**
 * @file theme.inc
 *
 * An array of preprocessors to fill variables for templates and helper
 * functions to make theming easier.
 */

/**
 * Provide a full array of possible themes to try for a given hook.
 *
 * @param $hook
 *   The hook to use. This is the base theme/template name.
 * @param $view
 *   The view being rendered.
 * @param $display
 *   The display being rendered, if applicable.
 */
function _views_theme_functions($hook, $view, $display = NULL) {
  $themes = array();

  if ($display) {
    $themes[] = $hook . '__' . $view->name . '__' . $display->id;
    $themes[] = $hook . '__' . $display->id;
    $themes[] = $hook . '__' . preg_replace('/[^a-z0-9]/', '-', strtolower($view->tag));
    if ($display->id != $display->display_plugin) {
      $themes[] = $hook . '__' . $view->name . '__' . $display->display_plugin;
      $themes[] = $hook . '__' . $display->display_plugin;
    }
  }
  $themes[] = $hook . '__' . $view->name;
  $themes[] = $hook;
  return $themes;
}

/**
 * Preprocess the primary theme implementation for a view.
 */
function template_preprocess_views_view(&$vars) {
  global $base_path;

  $view = $vars['view'];

  $vars['rows']       = !empty($view->result) || !empty($view->style_plugin->definition['even empty']) ? $view->style_plugin->render($view->result) : '';

  $vars['css_name']   = views_css_safe($view->name);
  $vars['name']       = $view->name;
  $vars['display_id'] = $view->current_display;

  // Basic classes
  $vars['classes_array'] = array();
  $vars['classes_array'][] = 'view';
  $vars['classes_array'][] = 'view-' . views_css_safe($vars['name']);
  $vars['classes_array'][] = 'view-id-' . $vars['name'];
  $vars['classes_array'][] = 'view-display-id-' . $vars['display_id'];

  $css_class = $view->display_handler->get_option('css_class');
  if (!empty($css_class)) {
    $vars['css_class'] = preg_replace('/[^a-zA-Z0-9- ]/', '-', $css_class);
    $vars['classes_array'][] = $vars['css_class'];
  }

  if (!$vars['rows']) {
    $vars['empty']    = $view->display_handler->render_empty();
    if (!$view->display_handler->get_option('header_empty')) {
      $vars['header'] = '';
    }
    if (!$view->display_handler->get_option('footer_empty')) {
      $vars['footer'] = '';
    }
  }
  else {
    $vars['empty']    = '';
    $header = TRUE;
  }

  $vars['exposed']    = !empty($view->exposed_widgets) ? $view->exposed_widgets : '';
  if (!isset($vars['header'])) {
    $vars['header']   = $view->display_handler->render_header();
  }
  if (!isset($vars['footer'])) {
    $vars['footer']   = $view->display_handler->render_footer();
  }
  $vars['more']       = $view->display_handler->render_more_link();
  $vars['feed_icon']  = !empty($view->feed_icon) ? $view->feed_icon : '';

  $vars['attachment_before'] = !empty($view->attachment_before) ? $view->attachment_before : '';
  $vars['attachment_after'] = !empty($view->attachment_after) ? $view->attachment_after : '';

  $vars['pager']      = '';

  $exposed_input = isset($view->exposed_data_raw) ? $view->exposed_data_raw : NULL;
  if ($view->display_handler->render_pager()) {
    $pager_type = ($view->pager['use_pager'] === 'mini' ? 'views_mini_pager' : 'pager');
    $pager_theme = views_theme_functions($pager_type, $view, $view->display_handler->display);
    $vars['pager']    = theme($pager_theme, $exposed_input, $view->pager['items_per_page'], $view->pager['element']);
  }

  // if administrator, add some links. These used to be tabs, but this is better.
  if (user_access('administer views') && module_exists('views_ui') && empty($view->hide_admin_links) && !variable_get('views_no_hover_links', FALSE)) {
    $vars['admin_links_raw'] = array(
      array(
        'title' => t('Edit'),
        'alt' => t("Edit this view"),
        'href' => "admin/build/views/edit/$view->name",
        'fragment' => 'views-tab-' . $view->current_display,
        'query' => drupal_get_destination(),
      ),
      array(
        'title' => t('Export'),
        'alt' => t("Export this view"),
        'href' => "admin/build/views/export/$view->name",
      ),
      array(
        'title' => t('Clone'),
        'alt' => t("Create a copy of this view"),
        'href' => "admin/build/views/clone/$view->name",
      ),
    );

    drupal_alter('views_admin_links', $vars['admin_links_raw'], $view);
    $vars['admin_links'] = theme('links', $vars['admin_links_raw']);
  }
  else {
    $vars['admin_links'] = '';
    $vars['admin_links_raw'] = array();
  }

  // Our JavaScript needs to have some means to find the HTML belonging to this
  // view.
  //
  // It is true that the DIV wrapper has classes denoting the name of the view
  // and its display ID, but this is not enough to unequivocally match a view
  // with its HTML, because one view may appear several times on the page. So
  // we set up a running counter, $dom_id, to issue a "unique" identifier for
  // each view. This identifier is written to both Drupal.settings and the DIV
  // wrapper.
  static $dom_id = 1;
  $vars['dom_id'] = !empty($view->dom_id) ? $view->dom_id : $dom_id++;
  $vars['classes_array'][] = 'view-dom-id-' . $vars['dom_id'];

  // If using AJAX, send identifying data about this view.
  if ($view->use_ajax) {
    $settings = array(
      'views' => array(
        'ajax_path' => url('views/ajax'),
        'ajaxViews' => array(
          array(
            'view_name' => $view->name,
            'view_display_id' => $view->current_display,
            'view_args' => check_plain(implode('/', $view->args)),
            'view_path' => check_plain($_GET['q']),
            // Pass through URL to ensure we get e.g. language prefixes.
//            'view_base_path' => isset($view->display['page']) ? substr(url($view->display['page']->display_options['path']), strlen($base_path)) : '',
            'view_base_path' => $view->get_path(),
            'view_dom_id' => $vars['dom_id'],
            // To fit multiple views on a page, the programmer may have
            // overridden the display's pager_element.
            'pager_element' => $view->pager['element'],
          ),
        ),
      ),
    );

    drupal_add_js($settings, 'setting');
    views_add_js('ajax_view');
  }
  // Flatten the classes to a string for the template file.
  $vars['classes'] = implode(' ', $vars['classes_array']);
}

/**
 * Preprocess theme function to print a single record from a row, with fields
 */
function template_preprocess_views_view_fields(&$vars) {
  $view = $vars['view'];

  // Loop through the fields for this view.
  $inline = FALSE;
  $vars['fields'] = array(); // ensure it's at least an empty array.
  foreach ($view->field as $id => $field) {
    // render this even if set to exclude so it can be used elsewhere.
    $field_output = $view->style_plugin->get_field($view->row_index, $id);
    $empty = $field_output !== 0 && empty($field_output);
    if (empty($field->options['exclude']) && (!$empty || empty($field->options['hide_empty']))) {
      $object = new stdClass();

      $object->content = $field_output;
      if (isset($view->field[$id]->field_alias) && isset($vars['row']->{$view->field[$id]->field_alias})) {
        $object->raw = $vars['row']->{$view->field[$id]->field_alias};
      }
      else {
        $object->raw = NULL; // make sure it exists to reduce NOTICE
      }
      $object->inline = !empty($vars['options']['inline'][$id]);
      $object->inline_html = $object->inline ? 'span' : 'div';
      if (!empty($vars['options']['separator']) && $inline && $object->inline && $object->content) {
        $object->separator = filter_xss_admin($vars['options']['separator']);
      }

      $inline = $object->inline;

      $object->handler = &$view->field[$id];
      $object->element_type = $object->handler->element_type();

      $object->class = views_css_safe($id);
      $object->label = check_plain($view->field[$id]->label());
      $vars['fields'][$id] = $object;
    }
  }

}

/**
 * Display a single views field.
 *
 * Interesting bits of info:
 * $field->field_alias says what the raw value in $row will be. Reach it like
 * this: @code { $row->{$field->field_alias} @endcode
 */
function theme_views_view_field($view, $field, $row) {
  // Reference safe for PHP 4:
  return $view->field[$field->options['id']]->advanced_render($row);
}

/**
 * Process a single field within a view.
 *
 * This preprocess function isn't normally run, as a function is used by
 * default, for performance. However, by creating a template, this
 * preprocess should get picked up.
 */
function template_preprocess_views_view_field(&$vars) {
  $vars['output'] = $vars['field']->advanced_render($vars['row']);
}

/**
 * Preprocess theme function to print a single record from a row, with fields
 */
function template_preprocess_views_view_summary(&$vars) {
  $view     = $vars['view'];
  $argument = $view->argument[$view->build_info['summary_level']];

  $url_options = array();

  if (!empty($view->exposed_raw_input)) {
    $url_options['query'] = $view->exposed_raw_input;
  }
  $vars['classes'] = array();
  foreach ($vars['rows'] as $id => $row) {
    $vars['rows'][$id]->link = $argument->summary_name($row);
    $args = $view->args;
    $args[$argument->position] = $argument->summary_argument($row);

    $vars['rows'][$id]->url = url($view->get_url($args), $url_options);
    $vars['rows'][$id]->count = intval($row->{$argument->count_alias});
    if ($vars['rows'][$id]->url == base_path() . $_GET['q'] || $vars['rows'][$id]->url == base_path() . drupal_get_path_alias($_GET['q'])) {
      $vars['classes'][$id] = 'active';
    }
  }
}

/**
 * Template preprocess theme function to print summary basically
 * unformatted.
 */
function template_preprocess_views_view_summary_unformatted(&$vars) {
  $view     = $vars['view'];
  $argument = $view->argument[$view->build_info['summary_level']];
  $vars['classes'] = array();

  $url_options = array();

  if (!empty($view->exposed_raw_input)) {
    $url_options['query'] = $view->exposed_raw_input;
  }

  $count = 0;
  foreach ($vars['rows'] as $id => $row) {
    // only false on first time:
    if ($count++) {
      $vars['rows'][$id]->separator = filter_xss_admin($vars['options']['separator']);
    }
    $vars['rows'][$id]->link = $argument->summary_name($row);
    $args = $view->args;
    $args[$argument->position] = $argument->summary_argument($row);

    $vars['rows'][$id]->url = url($view->get_url($args), $url_options);
    $vars['rows'][$id]->count = intval($row->{$argument->count_alias});
    if ($vars['rows'][$id]->url == base_path() . $_GET['q'] || $vars['rows'][$id]->url == base_path() . drupal_get_path_alias($_GET['q'])) {
      $vars['classes'][$id] = 'active';
    }
  }
}

/**
 * Display a view as a table style.
 */
function template_preprocess_views_view_table(&$vars) {
  $view     = $vars['view'];

  // We need the raw data for this grouping, which is passed in as $vars['rows'].
  // However, the template also needs to use for the rendered fields.  We
  // therefore swap the raw data out to a new variable and reset $vars['rows']
  // so that it can get rebuilt.
  // Store rows so that they may be used by further preprocess functions.
  $result   = $vars['result'] = $vars['rows'];
  $vars['rows'] = array();

  $options  = $view->style_plugin->options;
  $handler  = $view->style_plugin;

  $fields   = &$view->field;
  $columns  = $handler->sanitize_columns($options['columns'], $fields);

  $active   = !empty($handler->active) ? $handler->active : '';
  $order    = !empty($handler->order) ? $handler->order : 'asc';

  $query    = tablesort_get_querystring();
  if ($query) {
    $query = '&' . $query;
  }

  // Fields must be rendered in order as of Views 2.3, so we will pre-render
  // everything.
  $renders = $handler->render_fields($result);

  foreach ($columns as $field => $column) {
    // render the header labels
    if ($field == $column && empty($fields[$field]->options['exclude'])) {
      $label = check_plain(!empty($fields[$field]) ? $fields[$field]->label() : '');
      if (empty($options['info'][$field]['sortable']) || !$fields[$field]->click_sortable()) {
        $vars['header'][$field] = $label;
      }
      else {
        // @todo -- make this a setting
        $initial = 'asc';

        if ($active == $field && $order == 'asc') {
          $initial = 'desc';
        }

        $title = t('sort by @s', array('@s' => $label));
        if ($active == $field) {
          $label .= theme('tablesort_indicator', $initial);
        }
        $link_options = array(
          'html' => true,
          'attributes' => array('title' => $title),
          'query' => 'order=' . urlencode($field) . '&sort=' . $initial . $query,
        );
        $vars['header'][$field] = l($label, $_GET['q'], $link_options);
      }
    }

    // Create a second variable so we can easily find what fields we have and what the
    // CSS classes should be.
    $vars['fields'][$field] = views_css_safe($field);
    if ($active == $field) {
      $vars['fields'][$field] .= ' active';
    }

    // Render each field into its appropriate column.
    foreach ($result as $num => $row) {
      if (!empty($fields[$field]) && empty($fields[$field]->options['exclude'])) {
        $field_output = $renders[$num][$field];

        if (!isset($vars['rows'][$num][$column])) {
          $vars['rows'][$num][$column] = '';
        }

        // Don't bother with separators and stuff if the field does not show up.
        if ($field_output === '') {
          continue;
        }

        // Place the field into the column, along with an optional separator.
        if ($vars['rows'][$num][$column] !== '') {
          if (!empty($options['info'][$column]['separator'])) {
            $vars['rows'][$num][$column] .= filter_xss_admin($options['info'][$column]['separator']);
          }
        }

        $vars['rows'][$num][$column] .= $field_output;
      }
    }
  }

  $count = 0;
  foreach ($vars['rows'] as $num => $row) {
    $vars['row_classes'][$num][] = ($count++ % 2 == 0) ? 'odd' : 'even';
  }

  $vars['row_classes'][0][] = 'views-row-first';
  $vars['row_classes'][count($vars['row_classes']) - 1][] = 'views-row-last';

  $vars['class'] = 'views-table';
  if (!empty($options['sticky'])) {
    drupal_add_js('misc/tableheader.js');
    $vars['class'] .= " sticky-enabled";
  }
  $vars['class'] .= ' cols-'. count($vars['rows']);
}

/**
 * Display a view as a grid style.
 */
function template_preprocess_views_view_grid(&$vars) {
  $view     = $vars['view'];
  $result   = $view->result;
  $options  = $view->style_plugin->options;
  $handler  = $view->style_plugin;

  $columns  = $options['columns'];

  $rows = array();

  if ($options['alignment'] == 'horizontal') {
    $row = array();
    $row_count = 0;
    foreach ($vars['rows'] as $count => $item) {
      $row[] = $item;
      $row_count++;
      if (($count + 1) % $columns == 0) {
        $rows[] = $row;
        $row = array();
        $row_count = 0;
      }
    }
    if ($row) {
      // Fill up the last line only if it's configured, but this is default.
      if (!empty($handler->options['fill_single_line']) || count($rows)) {
        for ($i = 0; $i < ($columns - $row_count); $i++) {
          $row[] = '';
        }
      }
      $rows[] = $row;
    }
  }
  else {
    $num_rows = floor(count($vars['rows']) / $columns);
    // The remainders are the 'odd' columns that are slightly longer.
    $remainders = count($vars['rows']) % $columns;
    $row = 0;
    $col = 0;
    foreach ($vars['rows'] as $count => $item) {
      $rows[$row][$col] = $item;
      $row++;

      if (!$remainders && $row == $num_rows) {
        $row = 0;
        $col++;
      }
      else if ($remainders && $row == $num_rows + 1) {
        $row = 0;
        $col++;
        $remainders--;
      }
    }
    for ($i = 0; $i < count($rows[0]); $i++) {
      // This should be string so that's okay :)
      if (!isset($rows[count($rows) - 1][$i])) {
        $rows[count($rows) - 1][$i] = '';
      }
    }
  }
  $vars['rows'] = $rows;
}

/**
 * Display the simple view of rows one after another
 */
function template_preprocess_views_view_unformatted(&$vars) {
  $view     = $vars['view'];
  $rows     = $vars['rows'];

  $vars['classes'] = array();
  // Set up striping values.
  foreach ($rows as $id => $row) {
    $row_classes = array();
    $row_classes[] = 'views-row';
    $row_classes[] = 'views-row-' . ($id + 1);
    $row_classes[] = 'views-row-' . ($id % 2 ? 'even' : 'odd');
    if ($id == 0) {
      $row_classes[] = 'views-row-first';
    }
    if ($id == count($rows) -1) {
      $row_classes[] = 'views-row-last';
    }
    // Flatten the classes to a string for each row for the template file.
    $vars['classes'][$id] = implode(' ', $row_classes);
  }
}

/**
 * Display the view as an HTML list element
 */
function template_preprocess_views_view_list(&$vars) {
  template_preprocess_views_view_unformatted($vars);
}

/**
 * Preprocess an RSS feed
 */
function template_preprocess_views_view_rss(&$vars) {
  global $base_url;
  global $language;

  $view     = &$vars['view'];
  $options  = &$vars['options'];
  $items    = &$vars['rows'];

  $style    = &$view->style_plugin;

  if (!empty($options['mission_description'])) {
    $description = variable_get('site_mission', '');
  }
  else {
    $description = $options['description'];
  }
  // The RSS 2.0 "spec" doesn't indicate HTML can be used in the description.
  // We strip all HTML tags, but need to prevent double encoding from properly
  // escaped source data (such as & becoming &amp;).
  $vars['description'] = check_plain(decode_entities(strip_tags($description)));

  if ($view->display_handler->get_option('sitename_title')) {
    $title = variable_get('site_name', 'Drupal');
    if ($slogan = variable_get('site_slogan', '')) {
      $title .= ' - ' . $slogan;
    }
  }
  else {
    $title = $view->get_title();
  }
  $vars['title'] = check_plain($title);

  // Figure out which display which has a path we're using for this feed. If there isn't
  // one, use the global $base_url
  $link_display_id = $view->display_handler->get_link_display();
  if ($link_display_id && !empty($view->display[$link_display_id])) {
    $path = $view->display[$link_display_id]->handler->get_path();
  }

  if ($path) {
    $path = $view->get_url(NULL, $path);
    $url_options = array('absolute' => TRUE);
    if (!empty($view->exposed_raw_input)) {
      $url_options['query'] = $view->exposed_raw_input;
    }

    // Compare the link to the default home page; if it's the default home page, just use $base_url.
    if ($path == variable_get('site_frontpage', 'node')) {
      $path = '';
    }

    $vars['link'] = check_url(url($path, $url_options));
  }

  $vars['langcode'] = check_plain($language->language);
  $vars['namespaces'] = drupal_attributes($style->namespaces);
  $vars['items'] = $items;
  $vars['channel_elements'] = format_xml_elements($style->channel_elements);

  drupal_set_header('Content-Type: application/rss+xml; charset=utf-8');
}

/**
 * Default theme function for all RSS rows.
 */
function template_preprocess_views_view_row_rss(&$vars) {
  $view     = &$vars['view'];
  $options  = &$vars['options'];
  $item     = &$vars['row'];

  $vars['title'] = check_plain($item->title);
  $vars['link'] = check_url($item->link);
  $vars['description'] = check_plain($item->description);
  $vars['item_elements'] = empty($item->elements) ? '' : format_xml_elements($item->elements);
}

/**
 * Default theme function for all filter forms.
 */
function template_preprocess_views_exposed_form(&$vars) {
  $form = &$vars['form'];

  // Put all single checkboxes together in the last spot.
  $checkboxes = '';

  if (!empty($form['q'])) {
    $vars['q'] = drupal_render($form['q']);
  }

  $vars['widgets'] = array();
  foreach ($form['#info'] as $id => $info) {
    // Set aside checkboxes.
    if (isset($form[$info['value']]['#type']) && $form[$info['value']]['#type'] == 'checkbox') {
      $checkboxes .= drupal_render($form[$info['value']]);
      continue;
    }
    $widget = new stdClass;
    // set up defaults so that there's always something there.
    $widget->label = $widget->operator = $widget->widget = NULL;

    $widget->id = $form[$info['value']]['#id'];
    if (!empty($info['label'])) {
      $widget->label = $info['label'];
    }
    if (!empty($info['operator'])) {
      $widget->operator = drupal_render($form[$info['operator']]);
    }
    $widget->widget = drupal_render($form[$info['value']]);
    $vars['widgets'][$id] = $widget;
  }

  // Wrap up all the checkboxes we set aside into a widget.
  if ($checkboxes) {
    $widget = new stdClass;
    // set up defaults so that there's always something there.
    $widget->label = $widget->operator = $widget->widget = NULL;
    $widget->widget = $checkboxes;
    $vars['widgets']['checkboxes'] = $widget;
  }

  // Don't render these:
  unset($form['form_id']);
  unset($form['form_build_id']);
  unset($form['form_token']);

  // This includes the submit button.
  $vars['button'] = drupal_render($form);
}

function theme_views_mini_pager($tags = array(), $limit = 10, $element = 0, $parameters = array(), $quantity = 9) {
  global $pager_page_array, $pager_total;

  // Calculate various markers within this pager piece:
  // Middle is used to "center" pages around the current page.
  $pager_middle = ceil($quantity / 2);
  // current is the page we are currently paged to
  $pager_current = $pager_page_array[$element] + 1;
  // max is the maximum page number
  $pager_max = $pager_total[$element];
  // End of marker calculations.


  $li_previous = theme('pager_previous', (isset($tags[1]) ? $tags[1] : t('‹‹')), $limit, $element, 1, $parameters);
  if (empty($li_previous)) {
    $li_previous = " ";
  }

  $li_next = theme('pager_next', (isset($tags[3]) ? $tags[3] : t('››')), $limit, $element, 1, $parameters);
  if (empty($li_next)) {
    $li_next = " ";
  }

  if ($pager_total[$element] > 1) {
    $items[] = array(
      'class' => 'pager-previous',
      'data' => $li_previous,
    );

    $items[] = array(
      'class' => 'pager-current',
      'data' => t('@current of @max', array('@current' => $pager_current, '@max' => $pager_max)),
    );

    $items[] = array(
      'class' => 'pager-next',
      'data' => $li_next,
    );
    return theme('item_list', $items, NULL, 'ul', array('class' => 'pager'));
  }
}

/**
 * @defgroup views_templates Views' template files
 * @{
 * All views templates can be overridden with a variety of names, using
 * the view, the display ID of the view, the display type of the view,
 * or some combination thereof.
 *
 * For each view, there will be a minimum of two templates used. The first
 * is used for all views: views-view.tpl.php.
 *
 * The second template is determined by the style selected for the view. Note
 * that certain aspects of the view can also change which style is used; for
 * example, arguments which provide a summary view might change the style to
 * one of the special summary styles.
 *
 * The default style for all views is views-view-unformatted.tpl.php
 *
 * Many styles will then farm out the actual display of each row to a row
 * style; the default row style is views-view-fields.tpl.php.
 *
 * Here is an example of all the templates that will be tried in the following
 * case:
 *
 * View, named foobar. Style: unformatted. Row style: Fields. Display: Page.
 *
 * - views-view--foobar--page.tpl.php
 * - views-view--page.tpl.php
 * - views-view--foobar.tpl.php
 * - views-view.tpl.php
 *
 * - views-view-unformatted--foobar--page.tpl.php
 * - views-view-unformatted--page.tpl.php
 * - views-view-unformatted--foobar.tpl.php
 * - views-view-unformatted.tpl.php
 *
 * - views-view-fields--foobar--page.tpl.php
 * - views-view-fields--page.tpl.php
 * - views-view-fields--foobar.tpl.php
 * - views-view-fields.tpl.php
 *
 * Important! When adding a new template to your theme, be sure to flush the
 * theme registry cache!
 *
 * @see _views_theme_functions
 * @}
 */

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