By extexan on

Hi all,

How can I add a class to in a module (not in a theme)? It's my module that determines the conditions for adding classes - and my theme that will show or hide elements based on those classes.

TIA.

⋅ Categories: Drupal 6.x

Comments

nevets’s picture

nevets commented

You module can implement hook_preprocess_page(), set variables that represent the body id and class(es). Drupal already sets $body_classes which you could append to or override totally. Your theme will then need to use the variables as part of the body tag, example

<body id="<?php print $body_id; ?>" class="<?php print $body_classes; ?>">
extexan’s picture

extexan commented

@nevits, thanks for that. Is that the Drupal 7 way? - coz I'm using 6.

I looked in Drupal API and didn't find hook_preprocessor_page. I found all manner of template_preprocess_page and phptemplate_preprocess_page. None with "preprocessOR", as you typed in your post - so I guessed that was just a type-o and it really should be just "preprocess". But those are all dealing with themes, not modules, right?

Is there really no way to add a body class from within a module?

It's never too late to have a happy childhood. ;-)

nevets’s picture

nevets commented

Sorry type on my part (I corrected the post), modules can implement hook_preprocces_page. If your module was called mymodule, you would implement mymodule_preprocess_page.

shiv.godi’s picture

shiv.godi commented

How to find the variables that represent the body id and class(es)?
Lets say, i'd like to style the node/2, node/3, etc... how would I identify unique body id or classes for each of the node?

Thanks

greenskunk’s picture

greenskunk
Location Great Valley, NY
commented

I know this is a little late but I didn't see an example for Drupal 6.
Adding a class or classes to the body of a page from a module. Please note that you could use either $vars or $variables based on the function argument. In this example, I used $variables and also note it is passed by reference.

function ModuleNameHere_preprocess_page(&$variables) {
  // string to array
  $classes = explode(' ', $variables['body_classes']);
  // add your class to the array
  $classes[] = 'my-special-css-class-name-here';
  // only apply a class on the front page
  if ($variables['is_front']) {
    $classes[] = 'my-homepage';
  }
  // only apply a class on a certain page ex. aDrupalSite.com/crazyModule/scream
  if (arg(1) == 'scream') {
    $classes[] = 'crazy-module-scream';
  }
  // assign it to the body_classes_array
  $variables['body_classes_array'] = $classes;
  // from array to string into body_classes
  $variables['body_classes'] = implode(' ', $classes); // Concatenate with spaces.
}

"It is a damn poor day when you don't learn something!" - Mr. Jones, teacher

mathieso’s picture

mathieso commented

Thnx, GS. Helpful code.

Kieran

federosky’s picture

federosky commented

Here is the list of hooks that your module could implement,

and below, the link to the hook to pre-process theme variables from within a module.

Hope it helps!!
--
Federico