hook_preprocess_page(): how to tell a views page?

Question

Im writing a custom module that need to insert some javascript and css files only in a Views page.

Im using hook_preprocess_page, but I can not tell if the current page is from a view:

function mymodule_preprocess_page(&vars)
{
    var_dump($vars); //output: nothings that reference the views!
    if([view page])
    {
        drupal_add_js([...]);
        drupal_add_css([...]);
        // Rebuild scripts 
        $scripts = drupal_get_js();
        $vars['scripts'] = $scripts;
        // Same for css
    }
}

I know i could use a template file (page-my_view_page_path.tpl.php), but the js and extra css must be included only if my module is enabled; so I like to keep this things directly inside my module code.

Ideas?

Answer 1

views_get_page_view() finds out what, if any, page view is currently in use. If it returns NULL, then the current page is not a views' page.

But using drupal_add_js() and drupal_add_css() in a hook_preprocess_page() won't work as expected because the variable $script and $style variables have already been set by template_preprocess_page(). Views's template preprocessing (see Jeremy French's answer) is probably a better place to add your CSS and JavaScript.

Answer 2

There is a lengthy thread on preprocessors for views here. This comment looks very simple to me.

function mymodule_theme_registry_alter(&$theme_registry) {
  //dpm($theme_registry);
  $theme_registry['views_view__YOUR_VIEW_NAME_HERE']['preprocess functions'][] = 'mymodule_preprocess_func';
}

// now go on and play with your new preprocess function
function mymodule_preprocess_func(&$vars) {
  // etc
}

Answer 3

If you're in a hook_preprocess_page() then, by definition, your view has a page display and a menu path, which must be unique - so you can do this:

function mymodule_preprocess_page(&vars)
{
    var_dump($vars); //output: nothings that reference the views!
    if($_GET['q'] == 'my/view/path')
    {
        drupal_add_js([...]);
        drupal_add_css([...]);
    }
}

If you have arguments being passed to this page, so you need parts of $_GET['q'], then do this instead with Drupal's arg() function:

if(arg(0) == 'my' && arg(1) == 'view' && arg(2) == 'path')

http://api.drupal.org/api/drupal/includes--bootstrap.inc/function/arg

Answer 4

For me this one works:

function MYMODULE_preprocess_page(&$vars) {
  $view = (array)views_get_page_view();
  if (!empty($view)) {
    // do stuff
  }
}

Answer 5

If you are adding JS or CSS to a specific callback then better to use hook_page_build():