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| 1 | <?php |
| 2 | /** |
| 3 | * Copyright © 2000, 2001 Geoffrey T. Dairiki <dairiki@dairiki.org> |
| 4 | * You may copy this code freely under the conditions of the GPL. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along |
| 17 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 19 | * http://www.gnu.org/copyleft/gpl.html |
| 20 | * |
| 21 | * @file |
| 22 | * @ingroup DifferenceEngine |
| 23 | * @defgroup DifferenceEngine DifferenceEngine |
| 24 | */ |
| 25 | |
| 26 | namespace Wikimedia\Diff; |
| 27 | |
| 28 | /** |
| 29 | * Stores, escapes and formats the results of word-level diff |
| 30 | */ |
| 31 | class WordAccumulator { |
| 32 | /** @var string */ |
| 33 | public $insClass = ' class="diffchange diffchange-inline"'; |
| 34 | /** @var string */ |
| 35 | public $delClass = ' class="diffchange diffchange-inline"'; |
| 36 | |
| 37 | /** @var array */ |
| 38 | private $lines = []; |
| 39 | /** @var string */ |
| 40 | private $line = ''; |
| 41 | /** @var string */ |
| 42 | private $group = ''; |
| 43 | /** @var string */ |
| 44 | private $tag = ''; |
| 45 | |
| 46 | /** |
| 47 | * @param string $new_tag |
| 48 | */ |
| 49 | private function flushGroup( $new_tag ) { |
| 50 | if ( $this->group !== '' ) { |
| 51 | $encGroup = htmlspecialchars( $this->group, ENT_NOQUOTES ); |
| 52 | if ( $this->tag == 'ins' ) { |
| 53 | $this->line .= "<ins{$this->insClass}>$encGroup</ins>"; |
| 54 | } elseif ( $this->tag == 'del' ) { |
| 55 | $this->line .= "<del{$this->delClass}>$encGroup</del>"; |
| 56 | } else { |
| 57 | $this->line .= $encGroup; |
| 58 | } |
| 59 | } |
| 60 | $this->group = ''; |
| 61 | $this->tag = $new_tag; |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * @param string $new_tag |
| 66 | */ |
| 67 | private function flushLine( $new_tag ) { |
| 68 | $this->flushGroup( $new_tag ); |
| 69 | if ( $this->line != '' ) { |
| 70 | $this->lines[] = $this->line; |
| 71 | } else { |
| 72 | # make empty lines visible by inserting an NBSP |
| 73 | $this->lines[] = "\u{00A0}"; |
| 74 | } |
| 75 | $this->line = ''; |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * @param string[] $words |
| 80 | * @param string $tag |
| 81 | */ |
| 82 | public function addWords( $words, $tag = '' ) { |
| 83 | if ( $tag != $this->tag ) { |
| 84 | $this->flushGroup( $tag ); |
| 85 | } |
| 86 | |
| 87 | foreach ( $words as $word ) { |
| 88 | // new-line should only come as first char of word. |
| 89 | if ( $word == '' ) { |
| 90 | continue; |
| 91 | } |
| 92 | if ( $word[0] == "\n" ) { |
| 93 | $this->flushLine( $tag ); |
| 94 | $word = substr( $word, 1 ); |
| 95 | } |
| 96 | // FIXME: Don't use assert() |
| 97 | // phpcs:ignore MediaWiki.Usage.ForbiddenFunctions.assert |
| 98 | assert( !strstr( $word, "\n" ) ); |
| 99 | $this->group .= $word; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * @return string[] |
| 105 | */ |
| 106 | public function getLines() { |
| 107 | $this->flushLine( '~done' ); |
| 108 | |
| 109 | return $this->lines; |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | /** @deprecated class alias since 1.41 */ |
| 114 | class_alias( WordAccumulator::class, 'MediaWiki\\Diff\\WordAccumulator' ); |