Файл: phpBB3/includes/diff/renderer.php
Строк: 792
<?php
/**
*
* @package diff
* @version $Id$
* @copyright (c) 2006 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
exit;
}
/**
* Code from pear.php.net, Text_Diff-1.1.0 package
* http://pear.php.net/package/Text_Diff/
*
* Modified by phpBB Group to meet our coding standards
* and being able to integrate into phpBB
*
* A class to render Diffs in different formats.
*
* This class renders the diff in classic diff format. It is intended that
* this class be customized via inheritance, to obtain fancier outputs.
*
* Copyright 2004-2008 The Horde Project (http://www.horde.org/)
*
* @package diff
*/
class diff_renderer
{
/**
* Number of leading context "lines" to preserve.
*
* This should be left at zero for this class, but subclasses may want to
* set this to other values.
*/
var $_leading_context_lines = 0;
/**
* Number of trailing context "lines" to preserve.
*
* This should be left at zero for this class, but subclasses may want to
* set this to other values.
*/
var $_trailing_context_lines = 0;
/**
* Constructor.
*/
function diff_renderer($params = array())
{
foreach ($params as $param => $value)
{
$v = '_' . $param;
if (isset($this->$v))
{
$this->$v = $value;
}
}
}
/**
* Get any renderer parameters.
*
* @return array All parameters of this renderer object.
*/
function get_params()
{
$params = array();
foreach (get_object_vars($this) as $k => $v)
{
if ($k[0] == '_')
{
$params[substr($k, 1)] = $v;
}
}
return $params;
}
/**
* Renders a diff.
*
* @param diff &$diff A diff object.
*
* @return string The formatted output.
*/
function render(&$diff)
{
$xi = $yi = 1;
$block = false;
$context = array();
// Create a new diff object if it is a 3-way diff
if (is_a($diff, 'diff3'))
{
$diff3 = &$diff;
$diff_1 = $diff3->get_original();
$diff_2 = $diff3->merged_output();
unset($diff3);
$diff = new diff($diff_1, $diff_2);
}
$nlead = $this->_leading_context_lines;
$ntrail = $this->_trailing_context_lines;
$output = $this->_start_diff();
$diffs = $diff->get_diff();
foreach ($diffs as $i => $edit)
{
// If these are unchanged (copied) lines, and we want to keep leading or trailing context lines, extract them from the copy block.
if (is_a($edit, 'diff_op_copy'))
{
// Do we have any diff blocks yet?
if (is_array($block))
{
// How many lines to keep as context from the copy block.
$keep = ($i == sizeof($diffs) - 1) ? $ntrail : $nlead + $ntrail;
if (sizeof($edit->orig) <= $keep)
{
// We have less lines in the block than we want for context => keep the whole block.
$block[] = $edit;
}
else
{
if ($ntrail)
{
// Create a new block with as many lines as we need for the trailing context.
$context = array_slice($edit->orig, 0, $ntrail);
$block[] = new diff_op_copy($context);
}
$output .= $this->_block($x0, $ntrail + $xi - $x0, $y0, $ntrail + $yi - $y0, $block);
$block = false;
}
}
// Keep the copy block as the context for the next block.
$context = $edit->orig;
}
else
{
// Don't we have any diff blocks yet?
if (!is_array($block))
{
// Extract context lines from the preceding copy block.
$context = array_slice($context, sizeof($context) - $nlead);
$x0 = $xi - sizeof($context);
$y0 = $yi - sizeof($context);
$block = array();
if ($context)
{
$block[] = new diff_op_copy($context);
}
}
$block[] = $edit;
}
$xi += ($edit->orig) ? sizeof($edit->orig) : 0;
$yi += ($edit->final) ? sizeof($edit->final) : 0;
}
if (is_array($block))
{
$output .= $this->_block($x0, $xi - $x0, $y0, $yi - $y0, $block);
}
return $output . $this->_end_diff();
}
function _block($xbeg, $xlen, $ybeg, $ylen, &$edits)
{
$output = $this->_start_block($this->_block_header($xbeg, $xlen, $ybeg, $ylen));
foreach ($edits as $edit)
{
switch (get_class($edit))
{
case 'diff_op_copy':
$output .= $this->_context($edit->orig);
break;
case 'diff_op_add':
$output .= $this->_added($edit->final);
break;
case 'diff_op_delete':
$output .= $this->_deleted($edit->orig);
break;
case 'diff_op_change':
$output .= $this->_changed($edit->orig, $edit->final);
break;
}
}
return $output . $this->_end_block();
}
function _start_diff()
{
return '';
}
function _end_diff()
{
return '';
}
function _block_header($xbeg, $xlen, $ybeg, $ylen)
{
if ($xlen > 1)
{
$xbeg .= ',' . ($xbeg + $xlen - 1);
}
if ($ylen > 1)
{
$ybeg .= ',' . ($ybeg + $ylen - 1);
}
// this matches the GNU Diff behaviour
if ($xlen && !$ylen)
{
$ybeg--;
}
else if (!$xlen)
{
$xbeg--;
}
return $xbeg . ($xlen ? ($ylen ? 'c' : 'd') : 'a') . $ybeg;
}
function _start_block($header)
{
return $header . "n";
}
function _end_block()
{
return '';
}
function _lines($lines, $prefix = ' ')
{
return $prefix . implode("n$prefix", $lines) . "n";
}
function _context($lines)
{
return $this->_lines($lines, ' ');
}
function _added($lines)
{
return $this->_lines($lines, '> ');
}
function _deleted($lines)
{
return $this->_lines($lines, '< ');
}
function _changed($orig, $final)
{
return $this->_deleted($orig) . "---n" . $this->_added($final);
}
/**
* Our function to get the diff
*/
function get_diff_content($diff)
{
return $this->render($diff);
}
}
/**
* Renders a unified diff
* @package diff
*/
class diff_renderer_unified extends diff_renderer
{
var $_leading_context_lines = 4;
var $_trailing_context_lines = 4;
/**
* Our function to get the diff
*/
function get_diff_content($diff)
{
return nl2br($this->render($diff));
}
function _block_header($xbeg, $xlen, $ybeg, $ylen)
{
if ($xlen != 1)
{
$xbeg .= ',' . $xlen;
}
if ($ylen != 1)
{
$ybeg .= ',' . $ylen;
}
return '<div class="diff"><big class="info">@@ -' . $xbeg . ' +' . $ybeg . ' @@</big></div>';
}
function _context($lines)
{
return '<pre class="diff context">' . htmlspecialchars($this->_lines($lines, ' ')) . '<br /></pre>';
}
function _added($lines)
{
return '<pre class="diff added">' . htmlspecialchars($this->_lines($lines, '+')) . '<br /></pre>';
}
function _deleted($lines)
{
return '<pre class="diff removed">' . htmlspecialchars($this->_lines($lines, '-')) . '<br /></pre>';
}
function _changed($orig, $final)
{
return $this->_deleted($orig) . $this->_added($final);
}
function _start_diff()
{
$start = '<div class="file">';
return $start;
}
function _end_diff()
{
return '</div>';
}
function _end_block()
{
return '';
}
}
/**
* "Inline" diff renderer.
*
* This class renders diffs in the Wiki-style "inline" format.
*
* @author Ciprian Popovici
* @package diff
*/
class diff_renderer_inline extends diff_renderer
{
var $_leading_context_lines = 10000;
var $_trailing_context_lines = 10000;
// Prefix and suffix for inserted text
var $_ins_prefix = '<span class="ins">';
var $_ins_suffix = '</span>';
// Prefix and suffix for deleted text
var $_del_prefix = '<span class="del">';
var $_del_suffix = '</span>';
var $_block_head = '';
// What are we currently splitting on? Used to recurse to show word-level
var $_split_level = 'lines';
/**
* Our function to get the diff
*/
function get_diff_content($diff)
{
return '<pre>' . nl2br($this->render($diff)) . '<br /></pre>';
}
function _start_diff()
{
return '';
}
function _end_diff()
{
return '';
}
function _block_header($xbeg, $xlen, $ybeg, $ylen)
{
return $this->_block_head;
}
function _start_block($header)
{
return $header;
}
function _lines($lines, $prefix = ' ', $encode = true)
{
if ($encode)
{
array_walk($lines, array(&$this, '_encode'));
}
if ($this->_split_level == 'words')
{
return implode('', $lines);
}
else
{
return implode("n", $lines) . "n";
}
}
function _added($lines)
{
array_walk($lines, array(&$this, '_encode'));
$lines[0] = $this->_ins_prefix . $lines[0];
$lines[sizeof($lines) - 1] .= $this->_ins_suffix;
return $this->_lines($lines, ' ', false);
}
function _deleted($lines, $words = false)
{
array_walk($lines, array(&$this, '_encode'));
$lines[0] = $this->_del_prefix . $lines[0];
$lines[sizeof($lines) - 1] .= $this->_del_suffix;
return $this->_lines($lines, ' ', false);
}
function _changed($orig, $final)
{
// If we've already split on words, don't try to do so again - just display.
if ($this->_split_level == 'words')
{
$prefix = '';
while ($orig[0] !== false && $final[0] !== false && substr($orig[0], 0, 1) == ' ' && substr($final[0], 0, 1) == ' ')
{
$prefix .= substr($orig[0], 0, 1);
$orig[0] = substr($orig[0], 1);
$final[0] = substr($final[0], 1);
}
return $prefix . $this->_deleted($orig) . $this->_added($final);
}
$text1 = implode("n", $orig);
$text2 = implode("n", $final);
// Non-printing newline marker.
$nl = " ";
// We want to split on word boundaries, but we need to preserve whitespace as well.
// Therefore we split on words, but include all blocks of whitespace in the wordlist.
$splitted_text_1 = $this->_split_on_words($text1, $nl);
$splitted_text_2 = $this->_split_on_words($text2, $nl);
$diff = new diff($splitted_text_1, $splitted_text_2);
unset($splitted_text_1, $splitted_text_2);
// Get the diff in inline format.
$renderer = new diff_renderer_inline(array_merge($this->get_params(), array('split_level' => 'words')));
// Run the diff and get the output.
return str_replace($nl, "n", $renderer->render($diff)) . "n";
}
function _split_on_words($string, $newline_escape = "n")
{
// Ignore