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<?php
/**
* Side by Side HTML diff generator for PHP DiffLib.
*
* PHP version 5
*
* Copyright (c) 2009 Chris Boulton <chris.boulton@interspire.com>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the Chris Boulton nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @package DiffLib
* @author Chris Boulton <chris.boulton@interspire.com>
* @copyright (c) 2009 Chris Boulton
* @license New BSD License http://www.opensource.org/licenses/bsd-license.php
* @version 1.1
* @link http://github.com/chrisboulton/php-diff
*/
require_once dirname(__FILE__).'/Array.php';
class Diff_Renderer_Html_SideBySide extends Diff_Renderer_Html_Array
{
/**
* Render a and return diff with changes between the two sequences
* displayed side by side.
*
* @return string The generated side by side diff.
*/
public function render()
{
$changes = parent::render();
$html = '';
if(empty($changes)) {
return $html;
}
$html .= '<table class="Differences DifferencesSideBySide">';
$html .= '<thead>';
$html .= '<tr>';
$html .= '<th colspan="2">The Original Version of the file</th>';
$html .= '<th colspan="2">The Modified Version on your WordPress system</th>';
$html .= '</tr>';
$html .= '</thead>';
foreach($changes as $i => $blocks) {
if($i > 0) {
$html .= '<tbody class="Skipped">';
$html .= '<th>…</th><td> </td>';
$html .= '<th>…</th><td> </td>';
$html .= '</tbody>';
}
foreach($blocks as $change) {
$html .= '<tbody class="Change'.ucfirst($change['tag']).'">';
// Equal changes should be shown on both sides of the diff
if($change['tag'] == 'equal') {
foreach($change['base']['lines'] as $no => $line) {
$fromLine = $change['base']['offset'] + $no + 1;
$toLine = $change['changed']['offset'] + $no + 1;
$html .= '<tr>';
$html .= '<th>'.$fromLine.'</th>';
$html .= '<td class="Left"><span>'.$line.'</span> </span></td>';
$html .= '<th>'.$toLine.'</th>';
$html .= '<td class="Right"><span>'.$line.'</span> </span></td>';
$html .= '</tr>';
}
}
// Added lines only on the right side
else if($change['tag'] == 'insert') {
foreach($change['changed']['lines'] as $no => $line) {
$toLine = $change['changed']['offset'] + $no + 1;
$html .= '<tr>';
$html .= '<th> </th>';
$html .= '<td class="Left"> </td>';
$html .= '<th>'.$toLine.'</th>';
$html .= '<td class="Right"><ins>'.$line.'</ins> </td>';
$html .= '</tr>';
}
}
// Show deleted lines only on the left side
else if($change['tag'] == 'delete') {
foreach($change['base']['lines'] as $no => $line) {
$fromLine = $change['base']['offset'] + $no + 1;
$html .= '<tr>';
$html .= '<th>'.$fromLine.'</th>';
$html .= '<td class="Left"><del>'.$line.'</del> </td>';
$html .= '<th> </th>';
$html .= '<td class="Right"> </td>';
$html .= '</tr>';
}
}
// Show modified lines on both sides
else if($change['tag'] == 'replace') {
if(count($change['base']['lines']) >= count($change['changed']['lines'])) {
foreach($change['base']['lines'] as $no => $line) {
$fromLine = $change['base']['offset'] + $no + 1;
$html .= '<tr>';
$html .= '<th>'.$fromLine.'</th>';
$html .= '<td class="Left"><span>'.$line.'</span> </td>';
if(!isset($change['changed']['lines'][$no])) {
$toLine = ' ';
$changedLine = ' ';
}
else {
$toLine = $change['base']['offset'] + $no + 1;
$changedLine = '<span>'.$change['changed']['lines'][$no].'</span>';
}
$html .= '<th>'.$toLine.'</th>';
$html .= '<td class="Right">'.$changedLine.'</td>';
$html .= '</tr>';
}
}
else {
foreach($change['changed']['lines'] as $no => $changedLine) {
if(!isset($change['base']['lines'][$no])) {
$fromLine = ' ';
$line = ' ';
}
else {
$fromLine = $change['base']['offset'] + $no + 1;
$line = '<span>'.$change['base']['lines'][$no].'</span>';
}
$html .= '<tr>';
$html .= '<th>'.$fromLine.'</th>';
$html .= '<td class="Left"><span>'.$line.'</span> </td>';
$toLine = $change['changed']['offset'] + $no + 1;
$html .= '<th>'.$toLine.'</th>';
$html .= '<td class="Right">'.$changedLine.'</td>';
$html .= '</tr>';
}
}
}
$html .= '</tbody>';
}
}
$html .= '</table>';
return $html;
}
}