indefero/src/IDF/Diff.php

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<?php
/* -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
# ***** BEGIN LICENSE BLOCK *****
# This file is part of InDefero, an open source project management application.
# Copyright (C) 2008 Céondo Ltd and contributors.
#
# InDefero 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.
#
# InDefero 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 St, Fifth Floor, Boston, MA 02110-1301 USA
#
# ***** END LICENSE BLOCK ***** */
/**
* Diff parser.
*
*/
class IDF_Diff
{
public $repo = '';
public $diff = '';
protected $lines = array();
public $files = array();
public function __construct($diff, $repo='')
{
$this->repo = $repo;
$this->diff = $diff;
$this->lines = preg_split("/\015\012|\015|\012/", $diff);
}
public function parse()
{
$current_file = '';
$current_chunk = 0;
$lline = 0;
$rline = 0;
$files = array();
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foreach ($this->lines as $line) {
if (0 === strpos($line, 'diff --git a')) {
$current_file = self::getFile($line);
$files[$current_file] = array();
$files[$current_file]['chunks'] = array();
$files[$current_file]['chunks_def'] = array();
$current_chunk = 0;
continue;
}
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if (0 === strpos($line, 'Index: ')) {
$current_file = self::getSvnFile($line);
$files[$current_file] = array();
$files[$current_file]['chunks'] = array();
$files[$current_file]['chunks_def'] = array();
$current_chunk = 0;
continue;
}
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if (0 === strpos($line, '@@ ')) {
$files[$current_file]['chunks_def'][] = self::getChunk($line);
$files[$current_file]['chunks'][] = array();
$current_chunk++;
$lline = $files[$current_file]['chunks_def'][$current_chunk-1][0][0];
$rline = $files[$current_file]['chunks_def'][$current_chunk-1][1][0];
continue;
}
if (0 === strpos($line, '---') or 0 === strpos($line, '+++')) {
continue;
}
if (0 === strpos($line, '-')) {
$files[$current_file]['chunks'][$current_chunk-1][] = array($lline, '', substr($line, 1));
$lline++;
continue;
}
if (0 === strpos($line, '+')) {
$files[$current_file]['chunks'][$current_chunk-1][] = array('', $rline, substr($line, 1));
$rline++;
continue;
}
if (0 === strpos($line, ' ')) {
$files[$current_file]['chunks'][$current_chunk-1][] = array($lline, $rline, substr($line, 1));
$rline++;
$lline++;
continue;
}
}
$this->files = $files;
return $files;
}
public static function getFile($line)
{
$line = substr(trim($line), 10);
$n = (int) strlen($line)/2;
return trim(substr($line, 3, $n-3));
}
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public static function getSvnFile($line)
{
return substr(trim($line), 7);
}
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/**
* Return the html version of a parsed diff.
*/
public function as_html()
{
$out = '';
foreach ($this->files as $filename=>$file) {
$out .= "\n".'<table class="diff" summary="">'."\n";
$out .= '<tr id="diff-'.md5($filename).'"><th colspan="3">'.Pluf_esc($filename).'</th></tr>'."\n";
$cc = 1;
foreach ($file['chunks'] as $chunk) {
foreach ($chunk as $line) {
if ($line[0] and $line[1]) {
$class = 'diff-c';
} elseif ($line[0]) {
$class = 'diff-r';
} else {
$class = 'diff-a';
}
$line_content = self::padLine(Pluf_esc($line[2]));
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$out .= sprintf('<tr class="diff-line"><td class="diff-lc">%s</td><td class="diff-lc">%s</td><td class="%s mono">%s</td></tr>'."\n", $line[0], $line[1], $class, $line_content);
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}
if (count($file['chunks']) > $cc)
$out .= '<tr class="diff-next"><td>...</td><td>...</td><td>&nbsp;</td></tr>'."\n";
$cc++;
}
$out .= '</table>';
}
return Pluf_Template::markSafe($out);
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}
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public static function padLine($line)
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{
$n = strlen($line);
for ($i=0;$i<$n;$i++) {
if (substr($line, $i, 1) != ' ') {
break;
}
}
return str_repeat('&nbsp;', $i).substr($line, $i);
}
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/**
* @return array array(array(start, n), array(start, n))
*/
public static function getChunk($line)
{
$elts = split(' ', $line);
$res = array();
for ($i=1;$i<3;$i++) {
$res[] = split(',', trim(substr($elts[$i], 1)));
}
return $res;
}
}