<?php declare(strict_types=1);
namespace SebastianBergmann\Diff\Output;
use function count;
abstract class AbstractChunkOutputBuilder implements DiffOutputBuilderInterface
{
protected function getCommonChunks(array $diff, int $lineThreshold = 5): array
{
$diffSize = count($diff);
$capturing = false;
$chunkStart = 0;
$chunkSize = 0;
$commonChunks = [];
for ($i = 0; $i < $diffSize; $i++) {
if ($diff[$i][1] === 0 ) {
if ($capturing === false) {
$capturing = true;
$chunkStart = $i;
$chunkSize = 0;
} else {
$chunkSize++;
}
} elseif ($capturing !== false) {
if ($chunkSize >= $lineThreshold) {
$commonChunks[$chunkStart] = $chunkStart + $chunkSize;
}
$capturing = false;
}
}