+<?php

+/**

+*

+* @package phpBB3

+* @version $Id$

+* @copyright (c) 2006 phpBB Group

+* @license http://opensource.org/licenses/gpl-license.php GNU Public License

+*

+*/

+

+/**

+*/

+if (!defined('IN_PHPBB'))

+{

+ exit;

+}

+

+/**

+* Code from pear.php.net, Text_Diff-0.2.1 (beta) package

+* http://pear.php.net/package/Text_Diff/

+*

+* Modified by Acyd Burn 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.

+*

+* @package phpBB3

+*/

+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;

+ $diff = &new diff($diff3->get_original(), $diff3->merged_output());

+ unset($diff3);

+ }

+

+ $nlead = $this->_leading_context_lines;

+ $ntrail = $this->_trailing_context_lines;

+

+ $output = $this->_start_diff();

+ $diffs = $diff->get_diff();

+

+ foreach ($diffs as $i => $edit)

+ {

+ if (is_a($edit, 'diff_op_copy'))

+ {

+ if (is_array($block))

+ {

+ $keep = ($i == sizeof($diffs) - 1) ? $ntrail : $nlead + $ntrail;

+ if (sizeof($edit->orig) <= $keep)

+ {

+ $block[] = $edit;

+ }

+ else

+ {

+ if ($ntrail)

+ {

+ $context = array_slice($edit->orig, 0, $ntrail);

+ $block[] = &new diff_op_copy($context);

+ }

+

+ $output .= $this->_block($x0, $ntrail + $xi - $x0, $y0, $ntrail + $yi - $y0, $block);

+ $block = false;

+ }

+ }

+ $context = $edit->orig;

+ }

+ else

+ {

+ if (!is_array($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);

+ }

+

+ 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 phpBB3

+*/

+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, ' ')) . '</pre>';

+ }

+

+ function _added($lines)

+ {

+ return '<pre class="diff added">' . htmlspecialchars($this->_lines($lines, '+')) . '</pre>';

+ }

+

+ function _deleted($lines)

+ {

+ return '<pre class="diff removed">' . htmlspecialchars($this->_lines($lines, '-')) . '</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 phpBB3

+*/

+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)) . '</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.

+ $diff = &new diff($this->_split_on_words($text1, $nl), $this->_split_on_words($text2, $nl));

+

+ // 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 phpBB3

+*/

+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: 400px;" 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 phpBB3

+*/

+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)

+ {

+ global $user;

+

+ $output = '';

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

+<caption>

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

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

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

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

+</caption>

+<tbody>

+';

+

+ $this->render($diff);

+

+ // Is the diff empty?

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

+ {

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

+ }

+ else

+ {

+ // Iterate through every header block of changes

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

+ {

+ $output .= '<tr><th>Line ' . $header['oldline'] . '</th><th>' . $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;') . '</pre></td>

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

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