<?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();
$indiff = false; // Used to skip the headers in the git patches
$i = 0; // Used to skip the end of a git patch with --\nversion number
foreach ($this->lines as $line) {
$i++;
if (0 === strpos($line, '--') and isset($this->lines[$i])
and preg_match('/^\d+\.\d+\.\d+\.\d+$/', $this->lines[$i])) {
break;
}
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;
$indiff = true;
continue;
} else if (preg_match('#^diff -r [^\s]+ -r [^\s]+ (.+)$#', $line, $matches)) {
$current_file = $matches[1];
$files[$current_file] = array();
$files[$current_file]['chunks'] = array();
$files[$current_file]['chunks_def'] = array();
$current_chunk = 0;
$indiff = true;
continue;
} else if (!$indiff && 0 === strpos($line, '=========')) {
// ignore pseudo stanzas with a hint of a binary file
if (preg_match("/^# (.+) is binary/", $this->lines[$i]))
continue;
// by default always use the new name of a possibly renamed file
$current_file = self::getMtnFile($this->lines[$i+1]);
// mtn 0.48 and newer set /dev/null as file path for dropped files
// so we display the old name here
if ($current_file == "/dev/null") {
$current_file = self::getMtnFile($this->lines[$i]);
}
if ($current_file == "/dev/null") {
throw new Exception(
"could not determine path from diff"
);
}
$files[$current_file] = array();
$files[$current_file]['chunks'] = array();
$files[$current_file]['chunks_def'] = array();
$current_chunk = 0;
$indiff = true;
continue;
} else if (0 === strpos($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;
$indiff = true;
continue;
}
if (!$indiff) {
continue;
}
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++;
$lline++;
continue;
}
if ($line == '') {
$files[$current_file]['chunks'][$current_chunk-1][] = array($lline, $rline, $line);
$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, $n-3));
}
public static function getSvnFile($line)
{
return substr(trim($line), 7);
}
public static function getMtnFile($line)
{
preg_match("/^[+-]{3} ([^\t]+)/", $line, $m);
return $m[1];
}
/**
* Return the html version of a parsed diff.
*/
public function as_html()
{
$out = '';
foreach ($this->files as $filename=>$file) {
$pretty = '';
$fileinfo = IDF_FileUtil::getMimeType($filename);
if (IDF_FileUtil::isSupportedExtension($fileinfo[2])) {
$pretty = ' prettyprint';
}
$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]));
$out .= sprintf('<tr class="diff-line"><td class="diff-lc">%s</td><td class="diff-lc">%s</td><td class="%s%s mono">%s</td></tr>'."\n", $line[0], $line[1], $class, $pretty, $line_content);
}
if (count($file['chunks']) > $cc)
$out .= '<tr class="diff-next"><td>...</td><td>...</td><td> </td></tr>'."\n";
$cc++;
}
$out .= '</table>';
}
return Pluf_Template::markSafe($out);
}
public static function padLine($line)
{
$line = str_replace("\t", ' ', $line);
$n = strlen($line);
for ($i=0;$i<$n;$i++) {
if (substr($line, $i, 1) != ' ') {
break;
}
}
return str_repeat(' ', $i).substr($line, $i);
}
/**
* @return array array(array(start, n), array(start, n))
*/
public static function getChunk($line)
{
$elts = explode(' ', $line);
$res = array();
for ($i=1;$i<3;$i++) {
$res[] = explode(',', trim(substr($elts[$i], 1)));
}
return $res;
}
/**
* Review patch.
*
* Given the original file as a string and the parsed
* corresponding diff chunks, generate a side by side view of the
* original file and new file with added/removed lines.
*
* Example of use:
*
* $diff = new IDF_Diff(file_get_contents($diff_file));
* $orig = file_get_contents($orig_file);
* $diff->parse();
* echo $diff->fileCompare($orig, $diff->files[$orig_file], $diff_file);
*
* @param string Original file
* @param array Chunk description of the diff corresponding to the file
* @param string Original file name
* @param int Number of lines before/after the chunk to be displayed (10)
* @return Pluf_Template_SafeString The table body
*/
public function fileCompare($orig, $chunks, $filename, $context=10)
{
$orig_lines = preg_split("/\015\012|\015|\012/", $orig);
$new_chunks = $this->mergeChunks($orig_lines, $chunks, $context);
return $this->renderCompared($new_chunks, $filename);
}
public function mergeChunks($orig_lines, $chunks, $context=10)
{
$spans = array();
$new_chunks = array();
$min_line = 0;
$max_line = 0;
//if (count($chunks['chunks_def']) == 0) return '';
foreach ($chunks['chunks_def'] as $chunk) {
$start = ($chunk[0][0] > $context) ? $chunk[0][0]-$context : 0;
$end = (($chunk[0][0]+$chunk[0][1]+$context-1) < count($orig_lines)) ? $chunk[0][0]+$chunk[0][1]+$context-1 : count($orig_lines);
$spans[] = array($start, $end);
}
// merge chunks/get the chunk lines
// these are reference lines
$chunk_lines = array();
foreach ($chunks['chunks'] as $chunk) {
foreach ($chunk as $line) {
$chunk_lines[] = $line;
}
}
$i = 0;
foreach ($chunks['chunks'] as $chunk) {
$n_chunk = array();
// add lines before
if ($chunk[0][0] > $spans[$i][0]) {
for ($lc=$spans[$i][0];$lc<$chunk[0][0];$lc++) {
$exists = false;
foreach ($chunk_lines as $line) {
if ($lc == $line[0]
or ($chunk[0][1]-$chunk[0][0]+$lc) == $line[1]) {
$exists = true;
break;
}
}
if (!$exists) {
$orig = isset($orig_lines[$lc-1]) ? $orig_lines[$lc-1] : '';
$n_chunk[] = array(
$lc,
$chunk[0][1]-$chunk[0][0]+$lc,
$orig
);
}
}
}
// add chunk lines
foreach ($chunk as $line) {
$n_chunk[] = $line;
}
// add lines after
$lline = $line;
if (!empty($lline[0]) and $lline[0] < $spans[$i][1]) {
for ($lc=$lline[0];$lc<=$spans[$i][1];$lc++) {
$exists = false;
foreach ($chunk_lines as $line) {
if ($lc == $line[0] or ($lline[1]-$lline[0]+$lc) == $line[1]) {
$exists = true;
break;
}
}
if (!$exists) {
$n_chunk[] = array(
$lc,
$lline[1]-$lline[0]+$lc,
$orig_lines[$lc-1]
);
}
}
}
$new_chunks[] = $n_chunk;
$i++;
}
// Now, each chunk has the right length, we need to merge them
// when needed
$nnew_chunks = array();
$i = 0;
foreach ($new_chunks as $chunk) {
if ($i>0) {
$lline = end($nnew_chunks[$i-1]);
if ($chunk[0][0] <= $lline[0]+1) {
// need merging
foreach ($chunk as $line) {
if ($line[0] > $lline[0] or empty($line[0])) {
$nnew_chunks[$i-1][] = $line;
}
}
} else {
$nnew_chunks[] = $chunk;
$i++;
}
} else {
$nnew_chunks[] = $chunk;
$i++;
}
}
return $nnew_chunks;
}
public function renderCompared($chunks, $filename)
{
$fileinfo = IDF_FileUtil::getMimeType($filename);
$pretty = '';
if (IDF_FileUtil::isSupportedExtension($fileinfo[2])) {
$pretty = ' prettyprint';
}
$out = '';
$cc = 1;
$i = 0;
foreach ($chunks as $chunk) {
foreach ($chunk as $line) {
$line1 = ' ';
$line2 = ' ';
$line[2] = (strlen($line[2])) ? self::padLine(Pluf_esc($line[2])) : ' ';
if ($line[0] and $line[1]) {
$class = 'diff-c';
$line1 = $line2 = $line[2];
} elseif ($line[0]) {
$class = 'diff-r';
$line1 = $line[2];
} else {
$class = 'diff-a';
$line2 = $line[2];
}
$out .= sprintf('<tr class="diff-line"><td class="diff-lc">%s</td><td class="%s mono%s"><code>%s</code></td><td class="diff-lc">%s</td><td class="%s mono%s"><code>%s</code></td></tr>'."\n", $line[0], $class, $pretty, $line1, $line[1], $class, $pretty, $line2);
}
if (count($chunks) > $cc)
$out .= '<tr class="diff-next"><td>...</td><td> </td><td>...</td><td> </td></tr>'."\n";
$cc++;
$i++;
}
return Pluf_Template::markSafe($out);
}
}
accountmanagementengine