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<?php
/**
* Context 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__).'/../Abstract.php';
class Diff_Renderer_Text_Context extends Diff_Renderer_Abstract
{
/**
* @var array Array of the different opcode tags and how they map to the context diff equivalent.
*/
private $tagMap = array(
'insert' => '+',
'delete' => '-',
'replace' => '!',
'equal' => ' '
);
/**
* Render and return a context formatted (old school!) diff file.
*
* @return string The generated context diff.
*/
public function render()
{
$diff = '';
$opCodes = $this->diff->getGroupedOpcodes();
foreach($opCodes as $group) {
$diff .= "***************\n";
$lastItem = count($group)-1;
$i1 = $group[0][1];
$i2 = $group[$lastItem][2];
$j1 = $group[0][3];
$j2 = $group[$lastItem][4];
if($i2 - $i1 >= 2) {
$diff .= '*** '.($group[0][1] + 1).','.$i2." ****".PHP_EOL;
}
else {
$diff .= '*** '.$i2." ****\n";
}
if($j2 - $j1 >= 2) {
$separator = '--- '.($j1 + 1).','.$j2." ----".PHP_EOL;
}
else {
$separator = '--- '.$j2." ----".PHP_EOL;
}
$hasVisible = false;
foreach($group as $code) {
if($code[0] == 'replace' || $code[0] == 'delete') {
$hasVisible = true;
break;
}
}
if($hasVisible) {
foreach($group as $code) {
list($tag, $i1, $i2, $j1, $j2) = $code;
if($tag == 'insert') {
continue;
}
$diff .= $this->tagMap[$tag].' '.implode(PHP_EOL.$this->tagMap[$tag].' ', $this->diff->GetA($i1, $i2)).PHP_EOL;
}
}
$hasVisible = false;
foreach($group as $code) {
if($code[0] == 'replace' || $code[0] == 'insert') {
$hasVisible = true;
break;
}
}
$diff .= $separator;
if($hasVisible) {
foreach($group as $code) {
list($tag, $i1, $i2, $j1, $j2) = $code;
if($tag == 'delete') {
continue;
}
$diff .= $this->tagMap[$tag].' '.implode(PHP_EOL.$this->tagMap[$tag].' ', $this->diff->GetB($j1, $j2)).PHP_EOL;
}
}
}
return $diff;
}
}
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