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

Add ndrum files
author Chris Cannam
date Wed, 28 Aug 2019 13:14:47 +0100
parents 129ea1e6d783
children
rev   line source
Chris@0 1 <?php
Chris@0 2
Chris@0 3 namespace Drupal\Component\Diff;
Chris@0 4
Chris@0 5 use Drupal\Component\Diff\Engine\HWLDFWordAccumulator;
Chris@0 6
Chris@0 7 /**
Chris@0 8 * @todo document
Chris@0 9 * @private
Chris@0 10 * @subpackage DifferenceEngine
Chris@0 11 */
Chris@0 12 class WordLevelDiff extends MappedDiff {
Chris@0 13
Chris@0 14 const MAX_LINE_LENGTH = 10000;
Chris@0 15
Chris@0 16 public function __construct($orig_lines, $closing_lines) {
Chris@0 17 list($orig_words, $orig_stripped) = $this->_split($orig_lines);
Chris@0 18 list($closing_words, $closing_stripped) = $this->_split($closing_lines);
Chris@0 19
Chris@0 20 parent::__construct($orig_words, $closing_words, $orig_stripped, $closing_stripped);
Chris@0 21 }
Chris@0 22
Chris@0 23 protected function _split($lines) {
Chris@0 24 $words = [];
Chris@0 25 $stripped = [];
Chris@0 26 $first = TRUE;
Chris@0 27 foreach ($lines as $line) {
Chris@0 28 // If the line is too long, just pretend the entire line is one big word
Chris@0 29 // This prevents resource exhaustion problems
Chris@0 30 if ( $first ) {
Chris@0 31 $first = FALSE;
Chris@0 32 }
Chris@0 33 else {
Chris@0 34 $words[] = "\n";
Chris@0 35 $stripped[] = "\n";
Chris@0 36 }
Chris@17 37 if (mb_strlen($line) > $this::MAX_LINE_LENGTH) {
Chris@0 38 $words[] = $line;
Chris@0 39 $stripped[] = $line;
Chris@0 40 }
Chris@0 41 else {
Chris@0 42 if (preg_match_all('/ ( [^\S\n]+ | [0-9_A-Za-z\x80-\xff]+ | . ) (?: (?!< \n) [^\S\n])? /xs', $line, $m)) {
Chris@0 43 $words = array_merge($words, $m[0]);
Chris@0 44 $stripped = array_merge($stripped, $m[1]);
Chris@0 45 }
Chris@0 46 }
Chris@0 47 }
Chris@0 48 return [$words, $stripped];
Chris@0 49 }
Chris@0 50
Chris@0 51 public function orig() {
Chris@0 52 $orig = new HWLDFWordAccumulator();
Chris@0 53
Chris@0 54 foreach ($this->edits as $edit) {
Chris@0 55 if ($edit->type == 'copy') {
Chris@0 56 $orig->addWords($edit->orig);
Chris@0 57 }
Chris@0 58 elseif ($edit->orig) {
Chris@0 59 $orig->addWords($edit->orig, 'mark');
Chris@0 60 }
Chris@0 61 }
Chris@0 62 $lines = $orig->getLines();
Chris@0 63 return $lines;
Chris@0 64 }
Chris@0 65
Chris@0 66 public function closing() {
Chris@0 67 $closing = new HWLDFWordAccumulator();
Chris@0 68
Chris@0 69 foreach ($this->edits as $edit) {
Chris@0 70 if ($edit->type == 'copy') {
Chris@0 71 $closing->addWords($edit->closing);
Chris@0 72 }
Chris@0 73 elseif ($edit->closing) {
Chris@0 74 $closing->addWords($edit->closing, 'mark');
Chris@0 75 }
Chris@0 76 }
Chris@0 77 $lines = $closing->getLines();
Chris@0 78 return $lines;
Chris@0 79 }
Chris@0 80
Chris@0 81 }