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<?php

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/**

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* Side by Side HTML diff generator for PHP DiffLib.

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* PHP version 5

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* Redistribution and use in source and binary forms, with or without

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* modification, are permitted provided that the following conditions are met:

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* - Redistributions of source code must retain the above copyright notice,

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* this list of conditions and the following disclaimer.

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* - Redistributions in binary form must reproduce the above copyright notice,

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* this list of conditions and the following disclaimer in the documentation

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* and/or other materials provided with the distribution.

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* - Neither the name of the Chris Boulton nor the names of its contributors

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* may be used to endorse or promote products derived from this software

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* without specific prior written permission.

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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

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* POSSIBILITY OF SUCH DAMAGE.

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* @package DiffLib

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* @author Chris Boulton <chris.boulton@interspire.com>

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* @license New BSD License http://www.opensource.org/licenses/bsd-license.php

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* @version 1.1

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* @link http://github.com/chrisboulton/php-diff

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require_once(dirname(__FILE__) . '/Array.php');

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class Diff_Renderer_Html_SideBySide extends Diff_Renderer_Html_Array

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{

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/**

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* Render a and return diff with changes between the two sequences

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* displayed side by side.

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* @return string The generated side by side diff.

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public function render()

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{

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$changes = parent::render();

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$html = '';

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if(empty($changes)) {

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return $html;

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}

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$html .= '<table class="Differences DifferencesSideBySide">';

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$html .= '<thead>';

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$html .= '<tr>';

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$html .= '<th colspan="2" width="50%">The Original Version of the file</th>';

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$html .= '<th colspan="2" width="50%">The Modified Version on your WordPress system</th>';

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$html .= '</tr>';

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$html .= '</thead>';

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foreach($changes as $i => $blocks) {

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if($i > 0) {

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$html .= '<tbody class="Skipped">';

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$html .= '<th>…</th><td> </td>';

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$html .= '<th>…</th><td> </td>';

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$html .= '</tbody>';

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}

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foreach($blocks as $change) {

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$html .= '<tbody class="Change'.ucfirst($change['tag']).'">';

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// Equal changes should be shown on both sides of the diff

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if($change['tag'] == 'equal') {

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foreach($change['base']['lines'] as $no => $line) {

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$fromLine = $change['base']['offset'] + $no + 1;

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$toLine = $change['changed']['offset'] + $no + 1;

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$html .= '<tr>';

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$html .= '<th>'.$fromLine.'</th>';

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$html .= '<td class="Left"><span>'.$line.'</span> </span></td>';

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$html .= '<th>'.$toLine.'</th>';

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$html .= '<td class="Right"><span>'.$line.'</span> </span></td>';

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$html .= '</tr>';

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}

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}

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// Added lines only on the right side

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else if($change['tag'] == 'insert') {

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foreach($change['changed']['lines'] as $no => $line) {

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$toLine = $change['changed']['offset'] + $no + 1;

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$html .= '<tr>';

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$html .= '<th> </th>';

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$html .= '<td class="Left"> </td>';

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$html .= '<th>'.$toLine.'</th>';

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$html .= '<td class="Right"><ins>'.$line.'</ins> </td>';

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$html .= '</tr>';

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}

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}

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// Show deleted lines only on the left side

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else if($change['tag'] == 'delete') {

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foreach($change['base']['lines'] as $no => $line) {

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$fromLine = $change['base']['offset'] + $no + 1;

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$html .= '<tr>';

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$html .= '<th>'.$fromLine.'</th>';

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$html .= '<td class="Left"><del>'.$line.'</del> </td>';

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$html .= '<th> </th>';

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$html .= '<td class="Right"> </td>';

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$html .= '</tr>';

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}

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}

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// Show modified lines on both sides

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else if($change['tag'] == 'replace') {

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if(count($change['base']['lines']) >= count($change['changed']['lines'])) {

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foreach($change['base']['lines'] as $no => $line) {

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$fromLine = $change['base']['offset'] + $no + 1;

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$html .= '<tr>';

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$html .= '<th>'.$fromLine.'</th>';

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$html .= '<td class="Left"><span>'.$line.'</span> </td>';

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if(!isset($change['changed']['lines'][$no])) {

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$toLine = ' ';

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$changedLine = ' ';

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}

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else {

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$toLine = $change['base']['offset'] + $no + 1;

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$changedLine = '<span>'.$change['changed']['lines'][$no].'</span>';

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}

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$html .= '<th>'.$toLine.'</th>';

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$html .= '<td class="Right">'.$changedLine.'</td>';

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$html .= '</tr>';

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}

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}

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else {

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foreach($change['changed']['lines'] as $no => $changedLine) {

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if(!isset($change['base']['lines'][$no])) {

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$fromLine = ' ';

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$line = ' ';

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}

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else {

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$fromLine = $change['base']['offset'] + $no + 1;

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$line = '<span>'.$change['base']['lines'][$no].'</span>';

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}

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$html .= '<tr>';

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$html .= '<th>'.$fromLine.'</th>';

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$html .= '<td class="Left"><span>'.$line.'</span> </td>';

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$toLine = $change['changed']['offset'] + $no + 1;

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$html .= '<th>'.$toLine.'</th>';

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$html .= '<td class="Right">'.$changedLine.'</td>';

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$html .= '</tr>';

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}

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}

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}

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$html .= '</tbody>';

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}

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}

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$html .= '</table>';

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return $html;

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}

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}

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