drupal_build_css_cache

• Drupal 5
• Drupal 6
• Drupal 7

Versions

5 – 6

drupal_build_css_cache($types, $filename)

7

drupal_build_css_cache($css, $filename)

Aggregate and optimize CSS files, putting them in the files directory.

Parameters

$css An array of CSS files to aggregate and compress into one file.

$filename The name of the aggregate CSS file.

Return value

The name of the CSS file.

Code

includes/common.inc, line 3357

<?php
function drupal_build_css_cache($css, $filename) {
  $data = '';

  // Create the css/ within the files folder.
  $csspath = 'public://css';
  file_prepare_directory($csspath, FILE_CREATE_DIRECTORY);
  if (!file_exists($csspath . '/' . $filename)) {
    // Build aggregate CSS file.
    foreach ($css as $stylesheet) {
      // Only 'file' stylesheets can be aggregated.
      if ($stylesheet['type'] == 'file') {
        $contents = drupal_load_stylesheet($stylesheet['data'], TRUE);
        // Return the path to where this CSS file originated from.
        $base = base_path() . dirname($stylesheet['data']) . '/';
        _drupal_build_css_path(NULL, $base);
        // Prefix all paths within this CSS file, ignoring external and absolute paths.
        $data .= preg_replace_callback('/url\([\'"]?(?![a-z]+:|\/+)([^\'")]+)[\'"]?\)/i', '_drupal_build_css_path', $contents);
      }
    }

    // Per the W3C specification at http://www.w3.org/TR/REC-CSS2/cascade.html#at-import,
    // @import rules must proceed any other style, so we move those to the top.
    $regexp = '/@import[^;]+;/i';
    preg_match_all($regexp, $data, $matches);
    $data = preg_replace($regexp, '', $data);
    $data = implode('', $matches[0]) . $data;

    // Create the CSS file.
    file_unmanaged_save_data($data, $csspath . '/' . $filename, FILE_EXISTS_REPLACE);
  }
  return $csspath . '/' . $filename;
}
?>

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