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<?php /** * Copyright © 2000, 2001 Geoffrey T. Dairiki <dairiki@dairiki.org> * You may copy this code freely under the conditions of the GPL. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file * @ingroup DifferenceEngine * @defgroup DifferenceEngine DifferenceEngine */ namespace Wikimedia\Diff; /** * Stores, escapes and formats the results of word-level diff */ class WordAccumulator { /** @var string */ public $insClass = ' class="diffchange diffchange-inline"'; /** @var string */ public $delClass = ' class="diffchange diffchange-inline"'; /** @var array */ private $lines = []; /** @var string */ private $line = ''; /** @var string */ private $group = ''; /** @var string */ private $tag = ''; /** * @param string $new_tag */ private function flushGroup( $new_tag ) { if ( $this->group !== '' ) { $encGroup = htmlspecialchars( $this->group, ENT_NOQUOTES ); if ( $this->tag == 'ins' ) { $this->line .= "<ins{$this->insClass}>$encGroup</ins>"; } elseif ( $this->tag == 'del' ) { $this->line .= "<del{$this->delClass}>$encGroup</del>"; } else { $this->line .= $encGroup; } } $this->group = ''; $this->tag = $new_tag; } /** * @param string $new_tag */ private function flushLine( $new_tag ) { $this->flushGroup( $new_tag ); if ( $this->line != '' ) { $this->lines[] = $this->line; } else { # make empty lines visible by inserting an NBSP $this->lines[] = "\u{00A0}"; } $this->line = ''; } /** * @param string[] $words * @param string $tag */ public function addWords( $words, $tag = '' ) { if ( $tag != $this->tag ) { $this->flushGroup( $tag ); } foreach ( $words as $word ) { // new-line should only come as first char of word. if ( $word == '' ) { continue; } if ( $word[0] == "\n" ) { $this->flushLine( $tag ); $word = substr( $word, 1 ); } // FIXME: Don't use assert() // phpcs:ignore MediaWiki.Usage.ForbiddenFunctions.assert assert( !strstr( $word, "\n" ) ); $this->group .= $word; } } /** * @return string[] */ public function getLines() { $this->flushLine( '~done' ); return $this->lines; } } /** @deprecated class alias since 1.41 */ class_alias( WordAccumulator::class, 'MediaWiki\\Diff\\WordAccumulator' );
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