bf61a77431
Only @inheritDoc works for the Sniff MediaWiki.Commenting.FunctionComment Change-Id: I91fc02cda6701d790e4334fc2bc47f230955545c
139 lines
3.5 KiB
PHP
139 lines
3.5 KiB
PHP
<?php
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/**
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* Copyright © 2000, 2001 Geoffrey T. Dairiki <dairiki@dairiki.org>
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* You may copy this code freely under the conditions of the GPL.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup DifferenceEngine
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* @defgroup DifferenceEngine DifferenceEngine
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*/
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use MediaWiki\Diff\ComplexityException;
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use MediaWiki\Diff\WordAccumulator;
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/**
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* Performs a word-level diff on several lines
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*
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* @ingroup DifferenceEngine
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*/
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class WordLevelDiff extends \Diff {
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/**
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* @inheritDoc
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*/
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protected $bailoutComplexity = 40000000; // Roughly 6K x 6K words changed
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/**
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* @param string[] $linesBefore
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* @param string[] $linesAfter
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*/
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public function __construct( $linesBefore, $linesAfter ) {
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list( $wordsBefore, $wordsBeforeStripped ) = $this->split( $linesBefore );
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list( $wordsAfter, $wordsAfterStripped ) = $this->split( $linesAfter );
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try {
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parent::__construct( $wordsBeforeStripped, $wordsAfterStripped );
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} catch ( ComplexityException $ex ) {
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// Too hard to diff, just show whole paragraph(s) as changed
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$this->edits = [ new DiffOpChange( $linesBefore, $linesAfter ) ];
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}
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$xi = $yi = 0;
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$editCount = count( $this->edits );
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for ( $i = 0; $i < $editCount; $i++ ) {
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$orig = &$this->edits[$i]->orig;
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if ( is_array( $orig ) ) {
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$orig = array_slice( $wordsBefore, $xi, count( $orig ) );
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$xi += count( $orig );
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}
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$closing = &$this->edits[$i]->closing;
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if ( is_array( $closing ) ) {
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$closing = array_slice( $wordsAfter, $yi, count( $closing ) );
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$yi += count( $closing );
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}
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}
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}
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/**
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* @param string[] $lines
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*
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* @return array[]
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*/
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private function split( $lines ) {
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$words = [];
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$stripped = [];
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$first = true;
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foreach ( $lines as $line ) {
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if ( $first ) {
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$first = false;
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} else {
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$words[] = "\n";
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$stripped[] = "\n";
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}
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$m = [];
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if ( preg_match_all( '/ ( [^\S\n]+ | [0-9_A-Za-z\x80-\xff]+ | . ) (?: (?!< \n) [^\S\n])? /xs',
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$line, $m ) ) {
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foreach ( $m[0] as $word ) {
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$words[] = $word;
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}
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foreach ( $m[1] as $stripped_word ) {
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$stripped[] = $stripped_word;
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}
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}
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}
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return [ $words, $stripped ];
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}
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/**
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* @return string[]
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*/
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public function orig() {
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$orig = new WordAccumulator;
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foreach ( $this->edits as $edit ) {
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if ( $edit->type == 'copy' ) {
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$orig->addWords( $edit->orig );
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} elseif ( $edit->orig ) {
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$orig->addWords( $edit->orig, 'del' );
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}
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}
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$lines = $orig->getLines();
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return $lines;
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}
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/**
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* @return string[]
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*/
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public function closing() {
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$closing = new WordAccumulator;
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foreach ( $this->edits as $edit ) {
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if ( $edit->type == 'copy' ) {
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$closing->addWords( $edit->closing );
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} elseif ( $edit->closing ) {
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$closing->addWords( $edit->closing, 'ins' );
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}
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}
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$lines = $closing->getLines();
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return $lines;
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}
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}
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