annotate core/lib/Drupal/Component/Diff/MappedDiff.php @ 19:fa3358dc1485 tip

Add ndrum files
author Chris Cannam
date Wed, 28 Aug 2019 13:14:47 +0100
parents 4c8ae668cc8c
children
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Chris@0 1 <?php
Chris@0 2
Chris@0 3 namespace Drupal\Component\Diff;
Chris@0 4
Chris@0 5 /**
Chris@0 6 * FIXME: bad name.
Chris@0 7 * @todo document
Chris@0 8 * @private
Chris@0 9 * @subpackage DifferenceEngine
Chris@0 10 */
Chris@0 11 class MappedDiff extends Diff {
Chris@0 12
Chris@0 13 /**
Chris@0 14 * Constructor.
Chris@0 15 *
Chris@0 16 * Computes diff between sequences of strings.
Chris@0 17 *
Chris@0 18 * This can be used to compute things like
Chris@0 19 * case-insensitive diffs, or diffs which ignore
Chris@0 20 * changes in white-space.
Chris@0 21 *
Chris@0 22 * @param array $from_lines
Chris@0 23 * An array of strings.
Chris@0 24 * (Typically these are lines from a file.)
Chris@0 25 * @param array $to_lines
Chris@0 26 * An array of strings.
Chris@0 27 * @param array $mapped_from_lines
Chris@0 28 * This array should have the same size number of elements as $from_lines.
Chris@0 29 * The elements in $mapped_from_lines and $mapped_to_lines are what is
Chris@0 30 * actually compared when computing the diff.
Chris@0 31 * @param array $mapped_to_lines
Chris@0 32 * This array should have the same number of elements as $to_lines.
Chris@0 33 */
Chris@0 34 public function __construct($from_lines, $to_lines, $mapped_from_lines, $mapped_to_lines) {
Chris@0 35
Chris@0 36 assert(sizeof($from_lines) == sizeof($mapped_from_lines));
Chris@0 37 assert(sizeof($to_lines) == sizeof($mapped_to_lines));
Chris@0 38
Chris@0 39 parent::__construct($mapped_from_lines, $mapped_to_lines);
Chris@0 40
Chris@0 41 $xi = $yi = 0;
Chris@0 42 for ($i = 0; $i < sizeof($this->edits); $i++) {
Chris@0 43 $orig = &$this->edits[$i]->orig;
Chris@0 44 if (is_array($orig)) {
Chris@0 45 $orig = array_slice($from_lines, $xi, sizeof($orig));
Chris@0 46 $xi += sizeof($orig);
Chris@0 47 }
Chris@0 48
Chris@0 49 $closing = &$this->edits[$i]->closing;
Chris@0 50 if (is_array($closing)) {
Chris@0 51 $closing = array_slice($to_lines, $yi, sizeof($closing));
Chris@0 52 $yi += sizeof($closing);
Chris@0 53 }
Chris@0 54 }
Chris@0 55 }
Chris@0 56
Chris@0 57 }