function MappedDiff::MappedDiff

Constructor.

Computes diff between sequences of strings.

This can be used to compute things like case-insensitve diffs, or diffs which ignore changes in white-space.

Parameters

$from_lines array An array of strings.: (Typically these are lines from a file.)

$to_lines array An array of strings.:

$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.

$mapped_to_lines array This array should: have the same number of elements as $to_lines.

File

drupal/core/lib/Drupal/Component/Diff/DiffEngine.php, line 738

A PHP diff engine for phpwiki. (Taken from phpwiki-1.3.3)

Class

MappedDiff

FIXME: bad name. @todo document @private @subpackage DifferenceEngine

Code

function MappedDiff($from_lines, $to_lines, $mapped_from_lines, $mapped_to_lines) {
  assert(sizeof($from_lines) == sizeof($mapped_from_lines));
  assert(sizeof($to_lines) == sizeof($mapped_to_lines));
  $this
    ->Diff($mapped_from_lines, $mapped_to_lines);
  $xi = $yi = 0;
  for ($i = 0; $i < sizeof($this->edits); $i++) {
    $orig =& $this->edits[$i]->orig;
    if (is_array($orig)) {
      $orig = array_slice($from_lines, $xi, sizeof($orig));
      $xi += sizeof($orig);
    }
    $closing =& $this->edits[$i]->closing;
    if (is_array($closing)) {
      $closing = array_slice($to_lines, $yi, sizeof($closing));
      $yi += sizeof($closing);
    }
  }
}