Question

我正在使用theme_menu_link修改菜单，在本例中为main_menu。 Evertything按预期工作，但我正在使用菜单块在内部页面的侧栏中呈现主菜单的另一个实例。

问题是，我只希望我的修改显示在我用于网站主导航的main_menu实例中，而不是在我在侧边栏中使用的实例中。

详细说明：

这是我的theme_menu_link函数

/**
 * Returns custom HTML for the main navigation menu.
 * Adds an HTML element to top level parent <li> elements
 * to serve as a drop-down menu toggle.
 *
 * this also sets the HTML wrapper for sub menus, to override the above
 * them_menu_tree function, which is intended for top level menus only.
 *
 * @param $variables
 *   An associative array containing:
 *   - element: Structured array data for a menu link.
 *
 * @ingroup themeable
 */
function mytheme_menu_link__main_menu($variables) {
  $element = $variables['element'];
  $child_menu = $element['#below'];
  $sub_menu = '';

  // if the current top level item has child menus (sub menus)
  if ($child_menu) {
    // unset the sub menu wrapper set above in mytheme_menu_tree__new_main_menu()
    unset($child_menu['#theme_wrappers']);

    // add opening ul tag for the sub menu wrapper to $sub_menu
    $sub_menu = '<ul class="menu sub-menu">';

    // iterate over each sub menu item
    foreach ($child_menu as $child_menu_item){

      // add sub menu item link HTML to a variable
      $child_menu_output = l($child_menu_item['#title'], $child_menu_item['#href']);

      // check to see if item has a title, sincle $element['#below'] returns things besides menu items
      if($child_menu_item['#title']) {
          // output each sub menu item's link and description, wrapped in a <li> element
          $sub_menu .= '<li>' . $child_menu_output .'</li>';
      } // end if shild menu item has a title

    } // end foreach child menu item

    // add closing ul tag for the sub menu wrapper to $sub_menu
    $sub_menu .= '</ul>';
  }

  // output a dummy link for top level items
  $output = '<a href="#" class="nolink">' . $element['#title'] . '</a>';
  return '<li' . drupal_attributes($element['#attributes']) . '>' . $output . $sub_menu . '</li>';

}

上述功能就像我希望它在网站的主导航上工作一样。但是，我不希望这个应用于我在侧边栏中使用Menu Block的main_menu实例。有没有办法有条件地使用them_menu_link基于区域或块菜单是bing渲染吗？

Answer 1

所以我找到了解决这个问题的方法，但我不确定它是不是最好的方法。

在theme_menu_link函数中使用krumo（$ variables）我可以看到每个菜单都有一个$variables['element']['#theme']的数组，其中第一项是菜单所在的块。所以对于主导航：$variables['element']['#theme'][0] === 'menu_link__menu_block__1'，以及侧边栏导航：$variables['element']['#theme'][0] === 'menu_link__menu_block__2'。

我看到在mytheme_menu_link__main_menu()函数中创建if / else并不困难，我们在其中为主菜单执行自定义（为顶级链接输出a href="#"，等），但不适用于侧边栏菜单。

所以新的和改进的theme_menu_link函数如下所示：

function mytheme_menu_link__main_menu($variables) {
  $element = $variables['element'];
  $sub_menu = '';
  // Only customize the menu instance if its the main navigation, not sidebar navigation, etc.
  // We need to check which block the menu is in, otherwise all instances of main_menu will get this treatment.
  if($element['#theme'][0] === 'menu_link__menu_block__1'){
    $child_menu = $element['#below'];
    // if the current top level item has child menus (sub menus)
    if ($child_menu) {
      // unset the sub menu wrapper set above in mytheme_menu_tree__new_main_menu()
      unset($child_menu['#theme_wrappers']);

      // add opening ul tag for the sub menu wrapper to $sub_menu
      $sub_menu = '<ul class="menu sub-menu">';

      // iterate over each sub menu item
      foreach ($child_menu as $child_menu_item){

        // add sub menu item link HTML to a variable
        $child_menu_output = l($child_menu_item['#title'], $child_menu_item['#href']);

        // check to see if item has a title, sincle $element['#below'] returns things besides menu items
        if($child_menu_item['#title']) {
            // output each sub menu item's link and description, wrapped in a <li> element
            $sub_menu .= '<li>' . $child_menu_output .'</li>';
        } // end if shild menu item has a title

      } // end foreach child menu item

      // add closing ul tag for the sub menu wrapper to $sub_menu
      $sub_menu .= '</ul>';
    }

    // output a dummy link for top level items
    $output = '<a href="#" class="nolink">' . $element['#title'] . '</a>';
    return '<li' . drupal_attributes($element['#attributes']) . '>' . $output . $sub_menu . '</li>';
    }

    // Otherwise if we're not in the main navigation block, output a normal menu
    else {
       if ($element['#below']) {
        // unset the sub-menu wrapper set above in mytheme_menu_tree__main_menu()
        unset($element['#below']['#theme_wrappers']);

        // Add a custom wrapper for sub-menus for CSS sanity and profit
        $sub_menu = '<ul class="menu sub-menu">' . drupal_render($element['#below']) . '</ul>';
      }

      $output = l($element['#title'], $element['#href'], $element['#localized_options']);
      return '<li' . drupal_attributes($element['#attributes']) . '>' . $output . $sub_menu . '</li>';
    }
}

Drupal - 如何使用them_menu_link仅修改菜单的一个实例

1 个答案: