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| <?php | |
| /** | |
| * | |
| * This file is part of the phpBB Forum Software package. | |
| * | |
| * @copyright (c) phpBB Limited <https://www.phpbb.com> | |
| * @license GNU General Public License, version 2 (GPL-2.0) | |
| * | |
| * For full copyright and license information, please see | |
| * the docs/CREDITS.txt file. | |
| * | |
| */ | |
| /** | |
| * @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 Limited 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 == count($diffs) - 1) ? $ntrail : $nlead + $ntrail; | |
| if (count($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, count($context) - $nlead); | |
| $x0 = $xi - count($context); | |
| $y0 = $yi - count($context); | |
| $block = array(); | |
| if ($context) | |
| { | |
| $block[] = new diff_op_copy($context); | |
| } | |
| } | |
| $block[] = $edit; | |
| } | |
| $xi += ($edit->orig) ? count($edit->orig) : 0; | |
| $yi += ($edit->final) ? count($edit->final) : 0; | |
| } | |
| if (is_array($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]; | |
| $lines[count($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]; | |
| $lines[count($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;" rows="15" cols="76" 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) | |
| { | |
| global $user; | |
| $output = ''; | |
| $output .= '<table cellspacing="0" class="hrdiff"> | |
| <caption> | |
| <span class="unmodified"> </span> ' . $user->lang['LINE_UNMODIFIED'] . ' | |
| <span class="added"> </span> ' . $user->lang['LINE_ADDED'] . ' | |
| <span class="modified"> </span> ' . $user->lang['LINE_MODIFIED'] . ' | |
| <span class="removed"> </span> ' . $user->lang['LINE_REMOVED'] . ' | |
| </caption> | |
| <tbody> | |
| '; | |
| $this->render($diff); | |
| // Is the diff empty? | |
| if (!count($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>' . $user->lang['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)) ? $line : ' ') . '<br /></pre></td> | |
| <td><pre>' . ((strlen($line)) ? $line : ' ') . '<br /></pre></td></tr>'; | |
| } | |
| switch ($change['type']) | |
| { | |
| case 'add': | |
| $line = ''; | |
| foreach ($change['lines'] as $_line) | |
| { | |
| $line .= htmlspecialchars($_line) . '<br />'; | |
| } | |
| $output .= '<tr><td class="added_empty"> </td><td class="added"><pre>' . ((strlen($line)) ? $line : ' ') . '<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 : ' ') . '<br /></pre></td><td class="removed_empty"> </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. | |
| $oldsize = count($change['old']); | |
| $newsize = count($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"> </td>'; | |
| } | |
| else | |
| { | |
| $output .= '<td class="unmodified"> </td>'; | |
| } | |
| if (!empty($right)) | |
| { | |
| $output .= '<td class="modified"><pre>' . $right . '<br /></pre></td>'; | |
| } | |
| else if ($row < $newsize) | |
| { | |
| $output .= '<td class="modified"> </td>'; | |
| } | |
| else | |
| { | |
| $output .= '<td class="unmodified"> </td>'; | |
| } | |
| $output .= '</tr>'; | |
| break; | |
| } | |
| } | |
| if (!empty($current_context)) | |
| { | |
| $line = $current_context; | |
| $current_context = ''; | |
| $output .= '<tr class="unmodified"><td><pre>' . ((strlen($line)) ? $line : ' ') . '<br /></pre></td>'; | |
| $output .= '<td><pre>' . ((strlen($line)) ? $line : ' ') . '<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); | |
| } | |
| } |