Club Drupal

<?php

 * @file

 * CSS filtering functions. Contains a disassembler, filter, compressor, and

 * decompressor.

 *

 * @param $css

 *   A chunk of well-formed CSS text to cache.

 *   If TRUE the css will be filtered. If FALSE the text will be cached

 *   as-is.

 *

 *   The filename the CSS will be cached in.

 */

function ctools_css_cache($css, $filter = TRUE) {

  // Create the css/ within the files folder.

  $path = 'public://ctools/css';

  if (!file_prepare_directory($path, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS)) {

    drupal_set_message(t('Unable to create CTools CSS cache directory. Check the permissions on your files directory.'), 'error');

    return;

  }

 *   An array of css data, as produced by @see ctools_css_disassemble()

 *   disassembler and the @see ctools_css_filter_css_data() filter.

 *

 *   css optimized for human viewing.

 */

function ctools_css_assemble($css_data) {

 *   An array of css data, as produced by @see ctools_css_disassemble()

 *   disassembler and the @see ctools_css_filter_css_data() filter.

 *

 *   css optimized for use.

 */

function ctools_css_compress($css_data) {

 * @param string $css

 *   A string containing the css to be disassembled.

 *

 *   An array of disassembled, slightly cleaned-up/formatted css statements.

 */

function ctools_css_disassemble($css) {

 *   An array of disassembled, filtered CSS.

 */

function ctools_css_filter_css_data($css, $allowed_properties = array(), $allowed_values = array(), $allowed_values_regex = '', $disallowed_values_regex = '') {

  // Retrieve the default list of allowed properties if none is provided.

  $allowed_properties = !empty($allowed_properties) ? $allowed_properties : ctools_css_filter_default_allowed_properties();

  // Retrieve the default list of allowed values if none is provided.

  // Define allowed values regex if none is provided.

  $allowed_values_regex = !empty($allowed_values_regex) ? $allowed_values_regex : '/(#[0-9a-f]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|\d{0,2}\.?\d{0,2}(cm|em|ex|in|mm|pc|pt|px|%|,|\))?)/';

  // Define disallowed url() value contents, if none is provided.

  $disallowed_values_regex = !empty($disallowed_values_regex) ? $disallowed_values_regex : '/(url|expression)/';

  foreach ($css as $selector_str => $declaration) {

    foreach ($declaration as $property => $value) {

      if (!in_array($property, $allowed_properties)) {

        unset($css[$selector_str][$property]);

        continue;

      }

      $value = str_replace('!important', '', $value);

      if (preg_match($disallowed_values_regex, $value) || !(in_array($value, $allowed_values) || preg_match($allowed_values_regex, $value))) {

        unset($css[$selector_str][$property]);

        continue;

      }