-<?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 __construct($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 = "\0";

-

- // 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 \0; otherwise the while loop will never finish.

- $string = str_replace("\0", '', $string);

-

- $words = array();

- $length = strlen($string);

- $pos = 0;

-

- $tab_there = true;

- while ($pos < $length)

- {

- // Check for tabs... do not include them

- if ($tab_there && substr($string, $pos, 1) === "\t")

- {

- $words[] = "\t";

- $pos++;

-

- continue;

- }

- else

- {

- $tab_there = false;

- }

-

- // Eat a word with any preceding whitespace.

- $spaces = strspn(substr($string, $pos), " \n");

- $nextpos = strcspn(substr($string, $pos + $spaces), " \n");

- $words[] = str_replace("\n", $newline_escape, substr($string, $pos, $spaces + $nextpos));

- $pos += $spaces + $nextpos;

- }

-

- return $words;

- }

-

- function _encode(&$string)

- {

- $string = htmlspecialchars($string);

- }

-}

-

-/**

-* "raw" diff renderer.

-* This class could be used to output a raw unified patch file

-*

-* @package diff

-*/

-class diff_renderer_raw 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 '<textarea style="height: 290px;" class="full">' . htmlspecialchars($this->render($diff)) . '</textarea>';

- }

-

- function _block_header($xbeg, $xlen, $ybeg, $ylen)

- {

- if ($xlen != 1)

- {

- $xbeg .= ',' . $xlen;

- }

-

- if ($ylen != 1)

- {

- $ybeg .= ',' . $ylen;

- }

- return '@@ -' . $xbeg . ' +' . $ybeg . ' @@';

- }

-

- 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) . $this->_added($final);

- }

-}

-

-/**

-* "chora (Horde)" diff renderer - similar style.

-* This renderer class is a modified human_readable function from the Horde Framework.

-*

-* @package diff

-*/

-class diff_renderer_side_by_side extends diff_renderer

-{

- var $_leading_context_lines = 3;

- var $_trailing_context_lines = 3;

-

- var $lines = array();

-

- // Hold the left and right columns of lines for change blocks.

- var $cols;

- var $state;

-

- var $data = false;

-

- /**

- * Our function to get the diff

- */

- function get_diff_content($diff)

- {

- $output = '';

- $output .= '<table cellspacing="0" class="hrdiff">

-<caption>

- <span class="unmodified">&nbsp;</span> ' . phpbb::$user->lang['LINE_UNMODIFIED'] . '

- <span class="added">&nbsp;</span> ' . phpbb::$user->lang['LINE_ADDED'] . '

- <span class="modified">&nbsp;</span> ' . phpbb::$user->lang['LINE_MODIFIED'] . '

- <span class="removed">&nbsp;</span> ' . phpbb::$user->lang['LINE_REMOVED'] . '

-</caption>

-<tbody>

-';

-

- $this->render($diff);

-

- // Is the diff empty?

- if (!sizeof($this->lines))

- {

- $output .= '<tr><th colspan="2">' . phpbb::$user->lang['NO_VISIBLE_CHANGES'] . '</th></tr>';

- }

- else

- {

- // Iterate through every header block of changes

- foreach ($this->lines as $header)

- {

- $output .= '<tr><th>' . phpbb::$user->lang['LINE'] . ' ' . $header['oldline'] . '</th><th>' . phpbb::$user->lang['LINE'] . ' ' . $header['newline'] . '</th></tr>';

-

- // Each header block consists of a number of changes (add, remove, change).

- $current_context = '';

-

- foreach ($header['contents'] as $change)

- {

- if (!empty($current_context) && $change['type'] != 'empty')

- {

- $line = $current_context;

- $current_context = '';

-

- $output .= '<tr class="unmodified"><td><pre>' . ((strlen($line)) ? $line : '&nbsp;') . '<br /></pre></td>

- <td><pre>' . ((strlen($line)) ? $line : '&nbsp;') . '<br /></pre></td></tr>';

- }

-

- switch ($change['type'])

- {

- case 'add':

- $line = '';

-

- foreach ($change['lines'] as $_line)

- {

- $line .= htmlspecialchars($_line) . '<br />';

- }

-

- $output .= '<tr><td class="added_empty">&nbsp;</td><td class="added"><pre>' . ((strlen($line)) ? $line : '&nbsp;') . '<br /></pre></td></tr>';

- break;

-

- case 'remove':

- $line = '';

-

- foreach ($change['lines'] as $_line)

- {

- $line .= htmlspecialchars($_line) . '<br />';

- }

-

- $output .= '<tr><td class="removed"><pre>' . ((strlen($line)) ? $line : '&nbsp;') . '<br /></pre></td><td class="removed_empty">&nbsp;</td></tr>';

- break;

-

- case 'empty':

- $current_context .= htmlspecialchars($change['line']) . '<br />';

- break;

-

- case 'change':

- // Pop the old/new stacks one by one, until both are empty.

- $oldsize = sizeof($change['old']);

- $newsize = sizeof($change['new']);

- $left = $right = '';

-

- for ($row = 0, $row_max = max($oldsize, $newsize); $row < $row_max; ++$row)

- {

- $left .= isset($change['old'][$row]) ? htmlspecialchars($change['old'][$row]) : '';

- $left .= '<br />';

- $right .= isset($change['new'][$row]) ? htmlspecialchars($change['new'][$row]) : '';

- $right .= '<br />';

- }

-

- $output .= '<tr>';

-

- if (!empty($left))

- {

- $output .= '<td class="modified"><pre>' . $left . '<br /></pre></td>';

- }

- else if ($row < $oldsize)

- {

- $output .= '<td class="modified">&nbsp;</td>';

- }

- else

- {

- $output .= '<td class="unmodified">&nbsp;</td>';

- }

-

- if (!empty($right))

- {

- $output .= '<td class="modified"><pre>' . $right . '<br /></pre></td>';

- }

- else if ($row < $newsize)

- {

- $output .= '<td class="modified">&nbsp;</td>';

- }

- else

- {

- $output .= '<td class="unmodified">&nbsp;</td>';

- }

-

- $output .= '</tr>';

- break;

- }

- }

-

- if (!empty($current_context))

- {

- $line = $current_context;

- $current_context = '';

-

- $output .= '<tr class="unmodified"><td><pre>' . ((strlen($line)) ? $line : '&nbsp;') . '<br /></pre></td>';

- $output .= '<td><pre>' . ((strlen($line)) ? $line : '&nbsp;') . '<br /></pre></td></tr>';

- }

- }

- }

-

- $output .= '</tbody></table>';

-

- return $output;

- }

-

- function _start_diff()

- {

- $this->lines = array();

-

- $this->data = false;

- $this->cols = array(array(), array());

- $this->state = 'empty';

-

- return '';

- }

-

- function _end_diff()

- {

- // Just flush any remaining entries in the columns stack.

- switch ($this->state)

- {

- case 'add':

- $this->data['contents'][] = array('type' => 'add', 'lines' => $this->cols[0]);

- break;

-

- case 'remove':

- // We have some removal lines pending in our stack, so flush them.

- $this->data['contents'][] = array('type' => 'remove', 'lines' => $this->cols[0]);

- break;

-

- case 'change':

- // We have both remove and addition lines, so this is a change block.

- $this->data['contents'][] = array('type' => 'change', 'old' => $this->cols[0], 'new' => $this->cols[1]);

- break;

- }

-

- if ($this->data !== false)

- {

- $this->lines[] = $this->data;

- }

-

- return '';

- }

-

- function _block_header($xbeg, $xlen, $ybeg, $ylen)

- {

- // Push any previous header information to the return stack.

- if ($this->data !== false)

- {

- $this->lines[] = $this->data;

- }

-

- $this->data = array('type' => 'header', 'oldline' => $xbeg, 'newline' => $ybeg, 'contents' => array());

- $this->state = 'dump';

- }

-

- function _added($lines)

- {

- array_walk($lines, array(&$this, '_perform_add'));

- }

-

- function _perform_add($line)

- {

- if ($this->state == 'empty')

- {

- return '';

- }

-

- // This is just an addition line.

- if ($this->state == 'dump' || $this->state == 'add')

- {

- // Start adding to the addition stack.

- $this->cols[0][] = $line;

- $this->state = 'add';

- }

- else

- {

- // This is inside a change block, so start accumulating lines.

- $this->state = 'change';

- $this->cols[1][] = $line;

- }

- }

-

- function _deleted($lines)

- {

- array_walk($lines, array(&$this, '_perform_delete'));

- }

-

- function _perform_delete($line)

- {

- // This is a removal line.

- $this->state = 'remove';

- $this->cols[0][] = $line;

- }

-

- function _context($lines)

- {

- array_walk($lines, array(&$this, '_perform_context'));

- }

-

- function _perform_context($line)

- {

- // An empty block with no action.

- switch ($this->state)

- {

- case 'add':

- $this->data['contents'][] = array('type' => 'add', 'lines' => $this->cols[0]);

- break;

-

- case 'remove':

- // We have some removal lines pending in our stack, so flush them.

- $this->data['contents'][] = array('type' => 'remove', 'lines' => $this->cols[0]);

- break;

-

- case 'change':

- // We have both remove and addition lines, so this is a change block.

- $this->data['contents'][] = array('type' => 'change', 'old' => $this->cols[0], 'new' => $this->cols[1]);

- break;

- }

-

- $this->cols = array(array(), array());

- $this->data['contents'][] = array('type' => 'empty', 'line' => $line);

- $this->state = 'dump';

- }

-

- function _changed($orig, $final)

- {

- return $this->_deleted($orig) . $this->_added($final);

- }

-

-}

-

-?> \ No newline at end of file