/** * Portions taken from phpwiki-1.3.3. * * Copyright © 2000, 2001 Geoffrey T. Dairiki * 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 */ /** * MediaWiki default table style diff formatter * @todo document * @private * @ingroup DifferenceEngine */ class TableDiffFormatter extends DiffFormatter { function __construct() { $this->leadingContextLines = 2; $this->trailingContextLines = 2; } /** * @static * @param string $msg * * @return mixed */ public static function escapeWhiteSpace( $msg ) { $msg = preg_replace( '/^ /m', '  ', $msg ); $msg = preg_replace( '/ $/m', '  ', $msg ); $msg = preg_replace( '/ /', '  ', $msg ); return $msg; } /** * @param int $xbeg * @param int $xlen * @param int $ybeg * @param int $ylen * * @return string */ protected function blockHeader( $xbeg, $xlen, $ybeg, $ylen ) { // '' get replaced by a localised line number // in DifferenceEngine::localiseLineNumbers $r = '\n" . '\n"; return $r; } /** * Writes the header to the output buffer. * * @param string $header */ protected function startBlock( $header ) { $this->writeOutput( $header ); } protected function endBlock() { } /** * @param string[] $lines * @param string $prefix * @param string $color */ protected function lines( $lines, $prefix = ' ', $color = 'white' ) { } /** * HTML-escape parameter before calling this * * @param string $line * * @return string */ protected function addedLine( $line ) { return $this->wrapLine( '+', 'diff-addedline', $line ); } /** * HTML-escape parameter before calling this * * @param string $line * * @return string */ protected function deletedLine( $line ) { return $this->wrapLine( '−', 'diff-deletedline', $line ); } /** * HTML-escape parameter before calling this * * @param string $line * * @return string */ protected function contextLine( $line ) { return $this->wrapLine( ' ', 'diff-context', $line ); } /** * @param string $marker * @param string $class Unused * @param string $line * * @return string */ protected function wrapLine( $marker, $class, $line ) { if ( $line !== '' ) { // The
wrapper is needed for 'overflow: auto' style to scroll properly $line = Xml::tags( 'div', null, $this->escapeWhiteSpace( $line ) ); } return "$marker$line"; } /** * @return string */ protected function emptyLine() { return ' '; } /** * Writes all lines to the output buffer, each enclosed in . * * @param string[] $lines */ protected function added( $lines ) { foreach ( $lines as $line ) { $this->writeOutput( '' . $this->emptyLine() . $this->addedLine( '' . htmlspecialchars( $line ) . '' ) . "\n" ); } } /** * Writes all lines to the output buffer, each enclosed in . * * @param string[] $lines */ protected function deleted( $lines ) { foreach ( $lines as $line ) { $this->writeOutput( '' . $this->deletedLine( '' . htmlspecialchars( $line ) . '' ) . $this->emptyLine() . "\n" ); } } /** * Writes all lines to the output buffer, each enclosed in . * * @param string[] $lines */ protected function context( $lines ) { foreach ( $lines as $line ) { $this->writeOutput( '' . $this->contextLine( htmlspecialchars( $line ) ) . $this->contextLine( htmlspecialchars( $line ) ) . "\n" ); } } /** * Writes the two sets of lines to the output buffer, each enclosed in . * * @param string[] $orig * @param string[] $closing */ protected function changed( $orig, $closing ) { $diff = new WordLevelDiff( $orig, $closing ); $del = $diff->orig(); $add = $diff->closing(); # Notice that WordLevelDiff returns HTML-escaped output. # Hence, we will be calling addedLine/deletedLine without HTML-escaping. $ndel = count( $del ); $nadd = count( $add ); $n = max( $ndel, $nadd ); for ( $i = 0; $i < $n; $i++ ) { $delLine = $i < $ndel ? $this->deletedLine( $del[$i] ) : $this->emptyLine(); $addLine = $i < $nadd ? $this->addedLine( $add[$i] ) : $this->emptyLine(); $this->writeOutput( "{$delLine}{$addLine}\n" ); } } }
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