class BackdropDiffFormatter

backdrop_class_list in core/includes/bootstrap.classes.inc

Lists all the classes used by Backdrop core.

class BackdropDiffFormatter extends DiffFormatter {

  private $rows;
  private $lineStats = array(
    'counter' => array('x' => 0, 'y' => 0),
    'offset' => array('x' => 0, 'y' => 0),
  );
  private $showHeader = 0;

  protected function startDiff() {
    $this->rows = array();
  }

  protected function endDiff() {
    return $this->rows;
  }

  protected function blockHeader($xbeg, $xlen, $ybeg, $ylen) {
    return array(
      array(
        'data' => $xbeg + $this->lineStats['offset']['x'],
        'colspan' => 2,
      ),
      array(
        'data' => $ybeg + $this->lineStats['offset']['y'],
        'colspan' => 2,
      )
    );
  }

  protected function startBlock($header) {
    if ($this->showHeader) {
      $this->rows[] = $header;
    }
  }

  protected function endBlock() {
  }

  protected function lines($lines, $prefix = ' ', $color = 'white') {
  }

  protected function addedLine($line) {
    return array(
      array(
        'data' => '+',
        'class' => 'diff-marker diff-addedline',
      ),
      array(
        'data' => $line,
        'class' => 'diff-context diff-addedline',
      )
    );
  }

  protected function deletedLine($line) {
    return array(
      array(
        'data' => '-',
        'class' => 'diff-marker diff-deletedline',
      ),
      array(
        'data' => $line,
        'class' => 'diff-context diff-deletedline',
      )
    );
  }

  protected function contextLine($line) {
    return array(
      ' ',
      array(
        'data' => $line,
        'class' => 'diff-context',
      )
    );
  }

  protected function emptyLine() {
    return array(
      ' ',
      ' ',
    );
  }

  protected function added($lines) {
    foreach ($lines as $line) {
      $this->rows[] = array_merge($this->emptyLine(), $this->addedLine(check_plain($line)));
    }
  }

  protected function deleted($lines) {
    foreach ($lines as $line) {
      $this->rows[] = array_merge($this->deletedLine(check_plain($line)), $this->emptyLine());
    }
  }

  protected function context($lines) {
    foreach ($lines as $line) {
      $this->rows[] = array_merge($this->contextLine(check_plain($line)), $this->contextLine(check_plain($line)));
    }
  }

  function changed($orig, $closing) {
    $diff = new WordLevelDiff($orig, $closing);
    $del = $diff->orig();
    $add = $diff->closing();

    // Notice that WordLevelDiff returns HTML-escaped output.
    // Hence, we will be calling addedLine/deletedLine without HTML-escaping.

    while ($line = array_shift($del)) {
      $aline = array_shift($add);
      $this->rows[] = array_merge($this->deletedLine($line), isset($aline) ? $this->addedLine($aline) : $this->emptyLine());
    }
    // If any leftovers.
    foreach ($add as $line) {
      $this->rows[] = array_merge($this->emptyLine(), $this->addedLine($line));
    }
  }
}