113 lines
2.9 KiB
PHP
113 lines
2.9 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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namespace MediaWiki\Diff;
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/**
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* Stores, escapes and formats the results of word-level diff
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*
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* @internal
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* @ingroup DifferenceEngine
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*/
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class WordAccumulator {
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/** @var string */
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public $insClass = ' class="diffchange diffchange-inline"';
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/** @var string */
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public $delClass = ' class="diffchange diffchange-inline"';
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/** @var array */
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private $lines = [];
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/** @var string */
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private $line = '';
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/** @var string */
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private $group = '';
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/** @var string */
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private $tag = '';
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/**
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* @param string $new_tag
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*/
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private function flushGroup( $new_tag ) {
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if ( $this->group !== '' ) {
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if ( $this->tag == 'ins' ) {
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$this->line .= "<ins{$this->insClass}>" . htmlspecialchars( $this->group ) . '</ins>';
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} elseif ( $this->tag == 'del' ) {
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$this->line .= "<del{$this->delClass}>" . htmlspecialchars( $this->group ) . '</del>';
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} else {
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$this->line .= htmlspecialchars( $this->group );
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}
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}
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$this->group = '';
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$this->tag = $new_tag;
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}
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/**
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* @param string $new_tag
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*/
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private function flushLine( $new_tag ) {
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$this->flushGroup( $new_tag );
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if ( $this->line != '' ) {
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array_push( $this->lines, $this->line );
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} else {
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# make empty lines visible by inserting an NBSP
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array_push( $this->lines, "\u{00A0}" );
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}
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$this->line = '';
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}
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/**
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* @param string[] $words
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* @param string $tag
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*/
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public function addWords( $words, $tag = '' ) {
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if ( $tag != $this->tag ) {
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$this->flushGroup( $tag );
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}
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foreach ( $words as $word ) {
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// new-line should only come as first char of word.
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if ( $word == '' ) {
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continue;
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}
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if ( $word[0] == "\n" ) {
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$this->flushLine( $tag );
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$word = substr( $word, 1 );
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}
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// FIXME: Don't use assert()
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// phpcs:ignore MediaWiki.Usage.ForbiddenFunctions.assert
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assert( !strstr( $word, "\n" ) );
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$this->group .= $word;
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}
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}
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/**
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* @return string[]
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*/
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public function getLines() {
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$this->flushLine( '~done' );
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return $this->lines;
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}
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}
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