function magic_assets_regex_steps in Magic 7.2

Groups include/exclude patterns together.

This is required to allow for complex chained includes/excludes. We can't do this in a single, complicated regular expression as regex does not really support this (negative lookbehinds are not sufficient).

Parameters

$items: An array of include/exclude patterns.

Return value

array The include/exclude patterns as groups.

3 calls to magic_assets_regex_steps()

MagicCSSTestCase::testMagicCSSExcludes in ./magic.test

Test magic_assets_exclude().

MagicJSTestCase::testMagicJSExcludes in ./magic.test

Test magic_assets_exclude().

magic_css_js_alter in ./magic.module

Helper function to remove unwanted css or js.

File

includes/magic.assets.inc, line 92

A file to contain functions for the magic module to abuse.

Code

function magic_assets_regex_steps($items) {
  $switch = FALSE;
  $key = 0;
  $groups = array();

  // Iterate over all exclude/include paths and form groups. We start a new
  // group every time we switch from inclusion to exclusion.
  foreach ($items as $item) {

    // If an item starts with a "~" it is an inclusion pattern.
    if ($exclude = strpos($item, '~') === 0) {
      $item = substr($item, 1);
    }

    // Start a new group if we are switching between exclusion/inclusion.
    if ($switch !== $exclude && ($switch = !$switch) === FALSE) {
      $key++;
    }

    // Initialize the group with two empty arrays if it does not exist yet.
    if (!isset($groups[$key])) {
      $groups[$key] = array_fill(0, 2, array());
    }
    $groups[$key][!$switch ? 0 : 1][] = $item;
  }

  // Each group now needs to have its items converted to a regex string.
  foreach ($groups as &$group) {
    foreach (array(
      0,
      1,
    ) as $key) {
      $group[$key] = !empty($group[$key]) ? magic_assets_prepare_regex($group[$key]) : FALSE;
    }
  }
  return $groups;
}