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- <?php
- /**
- * "Inline" diff renderer.
- *
- * $Horde: framework/Text_Diff/Diff/Renderer/inline.php,v 1.21 2008/01/04 10:07:51 jan Exp $
- *
- * Copyright 2004-2008 The Horde Project (http://www.horde.org/)
- *
- * See the enclosed file COPYING for license information (LGPL). If you did
- * not receive this file, see http://opensource.org/licenses/lgpl-license.php.
- *
- * @author Ciprian Popovici
- * @package Text_Diff
- */
-
- /** Text_Diff_Renderer */
-
- // WP #7391
- require_once dirname(dirname(__FILE__)) . '/Renderer.php';
-
- /**
- * "Inline" diff renderer.
- *
- * This class renders diffs in the Wiki-style "inline" format.
- *
- * @author Ciprian Popovici
- * @package Text_Diff
- */
- class Text_Diff_Renderer_inline extends Text_Diff_Renderer {
-
- /**
- * Number of leading context "lines" to preserve.
- */
- var $_leading_context_lines = 10000;
-
- /**
- * Number of trailing context "lines" to preserve.
- */
- var $_trailing_context_lines = 10000;
-
- /**
- * Prefix for inserted text.
- */
- var $_ins_prefix = '<ins>';
-
- /**
- * Suffix for inserted text.
- */
- var $_ins_suffix = '</ins>';
-
- /**
- * Prefix for deleted text.
- */
- var $_del_prefix = '<del>';
-
- /**
- * Suffix for deleted text.
- */
- var $_del_suffix = '</del>';
-
- /**
- * Header for each change block.
- */
- var $_block_header = '';
-
- /**
- * What are we currently splitting on? Used to recurse to show word-level
- * changes.
- */
- var $_split_level = 'lines';
-
- function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
- {
- return $this->_block_header;
- }
-
- function _startBlock($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. */
- $diff = new Text_Diff($this->_splitOnWords($text1, $nl),
- $this->_splitOnWords($text2, $nl));
-
- /* Get the diff in inline format. */
- $renderer = new Text_Diff_Renderer_inline(array_merge($this->getParams(),
- array('split_level' => 'words')));
-
- /* Run the diff and get the output. */
- return str_replace($nl, "\n", $renderer->render($diff)) . "\n";
- }
-
- function _splitOnWords($string, $newlineEscape = "\n")
- {
- // Ignore \0; otherwise the while loop will never finish.
- $string = str_replace("\0", '', $string);
-
- $words = array();
- $length = strlen($string);
- $pos = 0;
-
- while ($pos < $length) {
- // Eat a word with any preceding whitespace.
- $spaces = strspn(substr($string, $pos), " \n");
- $nextpos = strcspn(substr($string, $pos + $spaces), " \n");
- $words[] = str_replace("\n", $newlineEscape, substr($string, $pos, $spaces + $nextpos));
- $pos += $spaces + $nextpos;
- }
-
- return $words;
- }
-
- function _encode(&$string)
- {
- $string = htmlspecialchars($string);
- }
-
- }
-