|
|
<?php
|
|
|
/**
|
|
|
* CLAROLINE.
|
|
|
*
|
|
|
* @version 1.7 $Revision: 1.12 $
|
|
|
*
|
|
|
* @copyright 2001-2005 Universite catholique de Louvain (UCL)
|
|
|
* @license http://www.gnu.org/copyleft/gpl.html (GPL) GENERAL PUBLIC LICENSE
|
|
|
* This program is under the terms of the GENERAL PUBLIC LICENSE (GPL)
|
|
|
* as published by the FREE SOFTWARE FOUNDATION. The GPL is available
|
|
|
* through the world-wide-web at http://www.gnu.org/copyleft/gpl.html
|
|
|
* @author Frederic Minne <zefredz@gmail.com>
|
|
|
*
|
|
|
* @package Wiki
|
|
|
*/
|
|
|
define("DIFF_EQUAL", "=");
|
|
|
define("DIFF_ADDED", "+");
|
|
|
define("DIFF_DELETED", "-");
|
|
|
define("DIFF_MOVED", "M");
|
|
|
|
|
|
/**
|
|
|
* Get difference between two strings.
|
|
|
*
|
|
|
* @param string old first string
|
|
|
* @param string new second string
|
|
|
* @param bool show_equals set to true to see line that are equal between
|
|
|
* the two strings (default true)
|
|
|
* @param string format_line_function callback function to format line
|
|
|
* (default 'format_line')
|
|
|
*
|
|
|
* @return string formated diff output
|
|
|
*/
|
|
|
function diff(
|
|
|
$old,
|
|
|
$new,
|
|
|
$show_equals = false,
|
|
|
$format_line_function = 'format_line'
|
|
|
) {
|
|
|
$oldArr = str_split_on_new_line($old);
|
|
|
$newArr = str_split_on_new_line($new);
|
|
|
|
|
|
$oldCount = count($oldArr);
|
|
|
$newCount = count($newArr);
|
|
|
|
|
|
$max = max($oldCount, $newCount);
|
|
|
|
|
|
//get added and deleted lines
|
|
|
|
|
|
$deleted = array_diff_assoc($oldArr, $newArr);
|
|
|
$added = array_diff_assoc($newArr, $oldArr);
|
|
|
|
|
|
$moved = [];
|
|
|
|
|
|
foreach ($added as $key => $candidate) {
|
|
|
foreach ($deleted as $index => $content) {
|
|
|
if ($candidate == $content) {
|
|
|
$moved[$key] = $candidate;
|
|
|
unset($added[$key]);
|
|
|
unset($deleted[$index]);
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
$output = '';
|
|
|
|
|
|
for ($i = 0; $i < $max; $i++) {
|
|
|
// line changed
|
|
|
if (isset($deleted[$i]) && isset($added[$i])) {
|
|
|
$output .= $format_line_function($i, DIFF_DELETED, $deleted[$i]);
|
|
|
$output .= $format_line_function($i, DIFF_ADDED, $added[$i]);
|
|
|
} elseif (isset($deleted[$i]) && !isset($added[$i])) {
|
|
|
// line deleted
|
|
|
$output .= $format_line_function($i, DIFF_DELETED, $deleted[$i]);
|
|
|
} elseif (isset($added[$i]) && !isset($deleted[$i])) {
|
|
|
// line added
|
|
|
$output .= $format_line_function($i, DIFF_ADDED, $added[$i]);
|
|
|
} elseif (isset($moved[$i])) {
|
|
|
// line moved
|
|
|
$output .= $format_line_function($i, DIFF_MOVED, $newArr[$i]);
|
|
|
} elseif ($show_equals) {
|
|
|
// line unchanged
|
|
|
$output .= $format_line_function($i, DIFF_EQUAL, $newArr[$i]);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return $output;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Split strings on new line.
|
|
|
*/
|
|
|
function str_split_on_new_line($str)
|
|
|
{
|
|
|
$content = [];
|
|
|
|
|
|
if (api_strpos($str, "\r\n") !== false) {
|
|
|
$content = explode("\r\n", $str);
|
|
|
} elseif (api_strpos($str, "\n") !== false) {
|
|
|
$content = explode("\n", $str);
|
|
|
} elseif (api_strpos($str, "\r") !== false) {
|
|
|
$content = explode("\r", $str);
|
|
|
} else {
|
|
|
$content[] = $str;
|
|
|
}
|
|
|
|
|
|
return $content;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Default and prototype format line function.
|
|
|
*
|
|
|
* @param int line line number
|
|
|
* @param mixed type line type, must be one of the following :
|
|
|
* DIFF_EQUAL, DIFF_MOVED, DIFF_ADDED, DIFF_DELETED
|
|
|
* @param string value line content
|
|
|
* @param bool skip_empty skip empty lines (default false)
|
|
|
*
|
|
|
* @return string formated diff line
|
|
|
*/
|
|
|
function format_line($line, $type, $value, $skip_empty = false)
|
|
|
{
|
|
|
if (trim($value) == "" && $skip_empty) {
|
|
|
return "";
|
|
|
} elseif (trim($value) == "") {
|
|
|
$value = ' ';
|
|
|
}
|
|
|
|
|
|
switch ($type) {
|
|
|
case DIFF_EQUAL:
|
|
|
// return $line. ' : ' . ' = <span class="diffEqual" >' . $value . '</span><br />' . "\n" ;
|
|
|
return '<span class="diffEqual" >'.$value.'</span><br />'."\n"; //juan carlos muestra solo color
|
|
|
break;
|
|
|
case DIFF_MOVED:
|
|
|
//return $line. ' : ' . ' M <span class="diffMoved" >' . $value . '</span><br />' . "\n" ; //juan carlos ra<EFBFBD>a la sustitye la inverior
|
|
|
return '<span class="diffMoved" >'.$value.'</span><br />'."\n"; //juan carlos muestra solo color
|
|
|
break;
|
|
|
case DIFF_ADDED:
|
|
|
//return $line . ' : ' . ' + <span class="diffAdded" >' . $value . '</span><br />' . "\n" ;
|
|
|
return '<span class="diffAdded" >'.$value.'</span><br />'."\n"; //juan carlos muestra solo color
|
|
|
break;
|
|
|
case DIFF_DELETED:
|
|
|
//return $line . ' : ' . ' - <span class="diffDeleted" >' . $value . '</span><br />' . "\n" ; //juan carlos ra<EFBFBD>a la sustitye la inverior
|
|
|
return '<span class="diffDeleted" >'.$value.'</span><br />'."\n"; //juan carlos muestra solo color
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Table format line function.
|
|
|
*
|
|
|
* @see format_line
|
|
|
*/
|
|
|
function format_table_line($line, $type, $value, $skip_empty = false)
|
|
|
{
|
|
|
if (trim($value) == "" && $skip_empty) {
|
|
|
return "";
|
|
|
} elseif (trim($value) == "") {
|
|
|
$value = ' ';
|
|
|
}
|
|
|
|
|
|
switch ($type) {
|
|
|
case DIFF_EQUAL:
|
|
|
return '<tr><td></td><td bgcolor="#FFFFFF">'.$value.'</td></tr>'."\n";
|
|
|
//juan carlos muestra solo color (no tambi<EFBFBD>n la l<EFBFBD>nea).
|
|
|
// Adem<EFBFBD>s EN IEXPLORER VA BIEN PERO EN FIREFOX 3 la etiqueta span no muestra el color de fondo que
|
|
|
// est<EFBFBD> definido en la hoja de estilos como background-color, aceptando s<EFBFBD>lo la propiedad color
|
|
|
// pero esta solo da color al texto con lo cual los cambios quedan poco resaltados, adem<EFBFBD>s
|
|
|
// los cambios de otros objetos que no sean texto no se indican por ej. a<EFBFBD>adir una imagen,
|
|
|
// por esta raz<EFBFBD>n doy el color de fondo al td directamente.
|
|
|
break;
|
|
|
case DIFF_MOVED:
|
|
|
return '<tr><td></td><td bgcolor="#FFFFAA">'.$value.'</td></tr>'."\n";
|
|
|
//juan carlos muestra solo color (no tambi<EFBFBD>n la l<EFBFBD>nea). Adem<EFBFBD>s EN IEXPLORER VA BIEN PERO EN FIREFOX 3
|
|
|
// la etiqueta span no muestra el color de fondo que est<EFBFBD> definido en la hoja de estilos como
|
|
|
// background-color, aceptando s<EFBFBD>lo la propiedad color pero esta solo da color al texto con lo cual
|
|
|
// los cambios quedan poco resaltados, adem<EFBFBD>s los cambios de otros objetos que no sean texto no se indican
|
|
|
// por ej. a<EFBFBD>adir una imagen, por esta raz<EFBFBD>n doy el color de fondo al td directamente.
|
|
|
break;
|
|
|
case DIFF_ADDED:
|
|
|
return '<tr><td></td><td bgcolor="#CCFFCC">'.$value.'</td></tr>'."\n";
|
|
|
//juan carlos muestra solo color (no tambi<EFBFBD>n la l<EFBFBD>nea). Adem<EFBFBD>s EN IEXPLORER VA BIEN
|
|
|
// PERO EN FIREFOX 3 la etiqueta span no muestra el color de fondo que est<EFBFBD> definido en la
|
|
|
// hoja de estilos como background-color, aceptando s<EFBFBD>lo la propiedad color pero esta solo
|
|
|
// da color al texto con lo cual los cambios quedan poco resaltados, adem<EFBFBD>s los cambios de
|
|
|
// otros objetos que no sean texto no se indican por ej. a<EFBFBD>adir una imagen, por esta raz<EFBFBD>n
|
|
|
// doy el color de fondo al td directamente.
|
|
|
break;
|
|
|
case DIFF_DELETED:
|
|
|
return '<tr><td></td><td bgcolor="#FFAAAA">'.$value.'</td></tr>'."\n";
|
|
|
//juan carlos muestra solo color (no tambi<EFBFBD>n la l<EFBFBD>nea). Adem<EFBFBD>s EN IEXPLORER VA BIEN PERO EN FIREFOX 3
|
|
|
// la etiqueta span no muestra el color de fondo que est<EFBFBD> definido en la hoja de estilos como background-color,
|
|
|
// aceptando s<EFBFBD>lo la propiedad color pero esta solo da color al texto con lo cual los cambios quedan poco
|
|
|
// resaltados, adem<EFBFBD>s los cambios de otros objetos que no sean texto no se indican por ej. a<EFBFBD>adir una imagen,
|
|
|
// por esta raz<EFBFBD>n doy el color de fondo al td directamente.
|
|
|
}
|
|
|
}
|
|
|
|
