annotate vendor/sebastian/diff/src/Output/AbstractChunkOutputBuilder.php @ 19:fa3358dc1485 tip

Add ndrum files
author Chris Cannam
date Wed, 28 Aug 2019 13:14:47 +0100
parents 1fec387a4317
children
rev   line source
Chris@14 1 <?php declare(strict_types=1);
Chris@14 2 /*
Chris@14 3 * This file is part of sebastian/diff.
Chris@14 4 *
Chris@14 5 * (c) Sebastian Bergmann <sebastian@phpunit.de>
Chris@14 6 *
Chris@14 7 * For the full copyright and license information, please view the LICENSE
Chris@14 8 * file that was distributed with this source code.
Chris@14 9 */
Chris@14 10
Chris@14 11 namespace SebastianBergmann\Diff\Output;
Chris@14 12
Chris@14 13 abstract class AbstractChunkOutputBuilder implements DiffOutputBuilderInterface
Chris@14 14 {
Chris@14 15 /**
Chris@14 16 * Takes input of the diff array and returns the common parts.
Chris@14 17 * Iterates through diff line by line.
Chris@14 18 *
Chris@14 19 * @param array $diff
Chris@14 20 * @param int $lineThreshold
Chris@14 21 *
Chris@14 22 * @return array
Chris@14 23 */
Chris@14 24 protected function getCommonChunks(array $diff, int $lineThreshold = 5): array
Chris@14 25 {
Chris@14 26 $diffSize = \count($diff);
Chris@14 27 $capturing = false;
Chris@14 28 $chunkStart = 0;
Chris@14 29 $chunkSize = 0;
Chris@14 30 $commonChunks = [];
Chris@14 31
Chris@14 32 for ($i = 0; $i < $diffSize; ++$i) {
Chris@14 33 if ($diff[$i][1] === 0 /* OLD */) {
Chris@14 34 if ($capturing === false) {
Chris@14 35 $capturing = true;
Chris@14 36 $chunkStart = $i;
Chris@14 37 $chunkSize = 0;
Chris@14 38 } else {
Chris@14 39 ++$chunkSize;
Chris@14 40 }
Chris@14 41 } elseif ($capturing !== false) {
Chris@14 42 if ($chunkSize >= $lineThreshold) {
Chris@14 43 $commonChunks[$chunkStart] = $chunkStart + $chunkSize;
Chris@14 44 }
Chris@14 45
Chris@14 46 $capturing = false;
Chris@14 47 }
Chris@14 48 }
Chris@14 49
Chris@14 50 if ($capturing !== false && $chunkSize >= $lineThreshold) {
Chris@14 51 $commonChunks[$chunkStart] = $chunkStart + $chunkSize;
Chris@14 52 }
Chris@14 53
Chris@14 54 return $commonChunks;
Chris@14 55 }
Chris@14 56 }