class MappedDiff

backdrop_class_list in core/includes/bootstrap.classes.inc

Lists all the classes used by Backdrop core.

class MappedDiff extends Diff {
  /**
   * Constructor.
   *
   * Computes diff between sequences of strings.
   *
   * This can be used to compute things like case-insensitive diffs, or diffs
   * which ignore changes in white-space.
   *
   * @param $from_lines array An array of strings.
   *   Typically these are lines from a file.
   *
   * @param $to_lines array An array of strings.
   *
   * @param $mapped_from_lines array This array should
   *   have the same size number of elements as $from_lines.
   *   The elements in $mapped_from_lines and
   *   $mapped_to_lines are what is actually compared
   *   when computing the diff.
   *
   * @param $mapped_to_lines array This array should
   *   have the same number of elements as $to_lines.
   */
  function __construct($from_lines, $to_lines, $mapped_from_lines, $mapped_to_lines) {
    assert(count($from_lines) == count($mapped_from_lines));
    assert(count($to_lines) == count($mapped_to_lines));

    parent::__construct($mapped_from_lines, $mapped_to_lines);

    $xi = $yi = 0;
    $editCount = count($this->edits);
    for ($i = 0; $i < $editCount; $i++) {
      $orig = & $this->edits[$i]->orig;
      if (is_array($orig)) {
        $orig = array_slice($from_lines, $xi, count($orig));
        $xi += count($orig);
      }

      $closing = & $this->edits[$i]->closing;
      if (is_array($closing)) {
        $closing = array_slice($to_lines, $yi, count($closing));
        $yi += count($closing);
      }
    }
  }
}