template.php in Drupal for Facebook 6.2

Logic needed for FBML theme.

File

themes/fb_fbml/template.php

<?php

/**
 * @file
 * Logic needed for FBML theme.
 * 
 */

/**
 * Theme engine calls this preprocess "hook" before rendering a page.
 *
 * We change template for iframes, add styles and fbjs.
 */
function fb_fbml_preprocess_page(&$vars, $hook) {
  global $_fb_app, $user, $conf;
  if (fb_is_iframe_canvas()) {

    // Iframe in a canvas
    $vars['template_file'] = 'iframe';
  }
  else {

    // FBML canvas page
    _fb_fbml_menu_hack();

    // Add our own stylesheet
    drupal_add_css(path_to_theme() . '/styles_fbml.css', 'theme', 'fbml');

    // On profile tabs, we must preprocess.  Kind of hacky, but so is facebook.
    $preprocess_css = $conf['preprocess_css'];
    if (fb_is_profile_tab()) {
      $conf['preprocess_css'] = TRUE;
    }
    $vars['styles'] = drupal_get_css();
    $conf['preprocess_css'] = $preprocess_css;

    // Restore original value
    // Include only Facebook aware javascript.
    $vars['fbjs'] = drupal_get_js('fbml');

    // Enforce that only admins see admin block.  This can be done (more
    // cleanly?) elsewhere.  But we're doing it here to make sure.
    if (!user_access('access administration pages')) {
      $vars['admin'] = '';
    }
    elseif ($vars['admin']) {
      $vars['admin'] = "<div class=\"region admin_sidebar\">\n" . $vars['admin'] . "\n</div><!-- end admin sidebar-->";
    }

    // Change 'Home' in breadcrumbs.
    $crumbs = drupal_get_breadcrumb();
    if (count($crumbs) && strpos($crumbs[0], t('Home'))) {
      $crumbs[0] = l(t($_fb_app->title), '');
      $vars['breadcrumb'] = theme('breadcrumb', $crumbs);
    }

    // Style page differently depending on which sidebars are present.
    // Approach copied from Zen theme.
    // allows styling based on context (home page, node of certain type, etc.)
    $body_classes = array();
    $body_classes[] = $vars['is_front'] ? 'front' : 'not-front';
    $body_classes[] = $user->uid > 0 ? 'logged-in' : 'not-logged-in';
    if (isset($vars['left']) && isset($vars['right'])) {
      $body_classes[] = 'with-both-sidebars';
    }
    elseif ($vars['right']) {
      $body_classes[] = 'with-sidebar-right';
    }
    elseif ($vars['left']) {
      $body_classes[] = 'with-sidebar-left';
    }

    // new facebook pages are wider
    if ($_REQUEST['fb_sig_in_new_facebook']) {
      $body_classes[] = 'in-new-facebook';
    }

    // Regions
    $region_list = array(
      'prefaces' => array(
        'preface_first',
        'preface_middle',
        'preface_last',
      ),
    );
    foreach ($region_list as $sub_region_key => $sub_region_list) {
      $active_regions = array();
      foreach ($sub_region_list as $region_item) {
        if ($vars[$region_item]) {
          $active_regions[] = $region_item;
        }
      }
      $vars[$sub_region_key . '_class'] = $sub_region_key . '-' . strval(count($active_regions));
      $vars[$sub_region_key . '_count'] = count($active_regions);
    }
    $vars['body_classes'] = implode(' ', $body_classes);
  }
}
function _fb_fbml_menu_hack() {

  // We have to go out of our way here to theme the tabs.
  // The code in menu.inc that themes them is complex,
  // incomprehensible, and tangles the theme layer with the logic
  // layer.  It doesn't help that the same theme functions are called
  // for tabs as are called for all other menus.  So we use a global
  // to keep track of what we're doing.
  global $_fb_canvas_state;
  $_fb_canvas_state = 'tabs';

  // Why does a call to menu_tab_root_path theme the tabs?  I have no
  // idea, but it does and caches the result.
  menu_tab_root_path();
  $_fb_canvas_state = NULL;
}
function fb_fbml_preprocess_node(&$vars) {

  // Add node_bottom region content
  $vars['node_bottom'] = theme('blocks', 'node_bottom');
}

//// override tabs at top of page.  We rely on a hack in fb_canvas.module to detect when we are theming the tabs.
function fb_fbml_menu_local_task($link, $active = FALSE) {
  global $_fb_canvas_state;
  if ($_fb_canvas_state == 'tabs') {
    if ($active) {
      $link = str_replace('selected="false"', 'selected="true"', $link);
    }
    return $link;
  }
  else {
    return theme_menu_local_task($link, $active);
  }
}
function fb_fbml_menu_item_link($link) {
  global $_fb_canvas_state;
  if ($_fb_canvas_state == 'tabs') {

    // Theme an FBML tab
    $output = "<fb:tab-item href=\"" . url($link['href']) . (isset($link['title']) ? "\" title=\"" . $link['title'] : '') . "\" selected=\"false\">" . $link['title'] . "</fb:tab-item>\n";
    return $output;
  }
  else {
    return theme_menu_item_link($link);
  }
}
function fb_fbml_menu_local_tasks() {
  global $fb;

  // menu.inc generates the local task (tab) markup in a convoluted and inflexible way.  Because of this we generate markup with <fb:tab-item ...> for the secondary links.  Here we use replacement to "fix" this.
  if ($fb && $fb
    ->in_fb_canvas()) {
    $output = '';
    if ($primary = menu_primary_local_tasks()) {
      $output .= "<fb:tabs>\n" . $primary . "</fb:tabs>\n";
    }
    if ($secondary = menu_secondary_local_tasks()) {

      // replace fb:tab-items with list items
      $pattern = '|<fb:tab-item href="([^"]*)" title="([^"]*)"([^>]*)>([^<]*)</fb:tab-item>|';
      $replace = '<li $3><a href="$1">$4</a></li>';
      $secondary = preg_replace($pattern, $replace, $secondary);
      $output .= "<ul class=\"tabs secondary\">\n" . $secondary . "</ul>\n";
    }
  }
  else {
    $output = theme_menu_local_tasks();
  }
  return $output;
}

// collapsing fieldsets
function fb_fbml_fieldset($element) {
  global $fb;
  if ($fb && $fb
    ->in_fb_canvas() || fb_is_fbml_canvas()) {
    static $count = 0;
    if (isset($element['#collapsible']) && $element['#collapsible']) {
      $id = 'fbml_fieldset_' . $count++;
      $linkattrs = array(
        'clicktotoggle' => $id,
        'href' => '#',
      );
      $contentattrs = array(
        'id' => $id,
      );
      if (!isset($element['#attributes']['class'])) {
        $element['#attributes']['class'] = '';
      }
      $element['#attributes']['class'] .= ' collapsible';
      if ($element['#collapsed']) {
        $element['#attributes']['class'] .= ' collapsed';
        $contentattrs['style'] = 'display:none';
      }
      $element['#title'] = '<a ' . drupal_attributes($linkattrs) . '>' . $element['#title'] . '</a>';
    }
    $output = '<fieldset ' . drupal_attributes($element['#attributes']) . '>';
    if ($element['#title']) {
      $output .= '<legend>' . $element['#title'] . '</legend>';
    }
    $output .= '<div class="fieldset-content" ' . (isset($contentattrs) ? drupal_attributes($contentattrs) : '') . '>';
    if ($element['#description']) {
      $output .= '<div class="description">' . $element['#description'] . '</div>';
    }
    $output .= $element['#children'];
    if (isset($element['#value'])) {
      $output .= $element['#value'];
    }
    $output .= "</div></fieldset>\n";
  }
  else {
    $output = theme_fieldset($element);
  }
  return $output;
}

Functions

Name	Description
fb_fbml_fieldset
fb_fbml_menu_item_link
fb_fbml_menu_local_task
fb_fbml_menu_local_tasks
fb_fbml_preprocess_node
fb_fbml_preprocess_page	Theme engine calls this preprocess "hook" before rendering a page.
_fb_fbml_menu_hack