171 lines
4.6 KiB
PHP
171 lines
4.6 KiB
PHP
<?php
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/**
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* "Inline" diff renderer.
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*
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* $Horde: framework/Text_Diff/Diff/Renderer/inline.php,v 1.4.10.14 2008/01/04 10:37:27 jan Exp $
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*
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* Copyright 2004-2008 The Horde Project (http://www.horde.org/)
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*
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* See the enclosed file COPYING for license information (LGPL). If you did
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* not receive this file, see http://opensource.org/licenses/lgpl-license.php.
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*
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* @author Ciprian Popovici
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* @package Text_Diff
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*/
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/** Text_Diff_Renderer */
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require_once 'Text/Diff/Renderer.php';
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/**
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* "Inline" diff renderer.
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*
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* This class renders diffs in the Wiki-style "inline" format.
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*
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* @author Ciprian Popovici
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* @package Text_Diff
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*/
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class Text_Diff_Renderer_inline extends Text_Diff_Renderer {
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/**
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* Number of leading context "lines" to preserve.
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*/
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var $_leading_context_lines = 10000;
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/**
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* Number of trailing context "lines" to preserve.
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*/
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var $_trailing_context_lines = 10000;
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/**
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* Prefix for inserted text.
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*/
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var $_ins_prefix = '<ins>';
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/**
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* Suffix for inserted text.
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*/
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var $_ins_suffix = '</ins>';
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/**
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* Prefix for deleted text.
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*/
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var $_del_prefix = '<del>';
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/**
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* Suffix for deleted text.
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*/
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var $_del_suffix = '</del>';
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/**
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* Header for each change block.
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*/
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var $_block_header = '';
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/**
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* What are we currently splitting on? Used to recurse to show word-level
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* changes.
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*/
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var $_split_level = 'lines';
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function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
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{
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return $this->_block_header;
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}
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function _startBlock($header)
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{
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return $header;
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}
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function _lines($lines, $prefix = ' ', $encode = true)
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{
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if ($encode) {
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array_walk($lines, array(&$this, '_encode'));
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}
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if ($this->_split_level == 'words') {
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return implode('', $lines);
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} else {
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return implode("\n", $lines) . "\n";
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}
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}
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function _added($lines)
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{
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array_walk($lines, array(&$this, '_encode'));
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$lines[0] = $this->_ins_prefix . $lines[0];
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$lines[count($lines) - 1] .= $this->_ins_suffix;
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return $this->_lines($lines, ' ', false);
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}
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function _deleted($lines, $words = false)
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{
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array_walk($lines, array(&$this, '_encode'));
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$lines[0] = $this->_del_prefix . $lines[0];
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$lines[count($lines) - 1] .= $this->_del_suffix;
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return $this->_lines($lines, ' ', false);
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}
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function _changed($orig, $final)
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{
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/* If we've already split on words, don't try to do so again - just
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* display. */
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if ($this->_split_level == 'words') {
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$prefix = '';
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while ($orig[0] !== false && $final[0] !== false &&
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substr($orig[0], 0, 1) == ' ' &&
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substr($final[0], 0, 1) == ' ') {
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$prefix .= substr($orig[0], 0, 1);
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$orig[0] = substr($orig[0], 1);
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$final[0] = substr($final[0], 1);
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}
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return $prefix . $this->_deleted($orig) . $this->_added($final);
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}
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$text1 = implode("\n", $orig);
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$text2 = implode("\n", $final);
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/* Non-printing newline marker. */
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$nl = "\0";
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/* We want to split on word boundaries, but we need to
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* preserve whitespace as well. Therefore we split on words,
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* but include all blocks of whitespace in the wordlist. */
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$diff = new Text_Diff($this->_splitOnWords($text1, $nl),
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$this->_splitOnWords($text2, $nl));
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/* Get the diff in inline format. */
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$renderer = new Text_Diff_Renderer_inline(array_merge($this->getParams(),
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array('split_level' => 'words')));
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/* Run the diff and get the output. */
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return str_replace($nl, "\n", $renderer->render($diff)) . "\n";
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}
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function _splitOnWords($string, $newlineEscape = "\n")
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{
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// Ignore \0; otherwise the while loop will never finish.
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$string = str_replace("\0", '', $string);
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$words = array();
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$length = strlen($string);
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$pos = 0;
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while ($pos < $length) {
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// Eat a word with any preceding whitespace.
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$spaces = strspn(substr($string, $pos), " \n");
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$nextpos = strcspn(substr($string, $pos + $spaces), " \n");
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$words[] = str_replace("\n", $newlineEscape, substr($string, $pos, $spaces + $nextpos));
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$pos += $spaces + $nextpos;
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}
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return $words;
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}
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function _encode(&$string)
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{
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$string = htmlspecialchars($string);
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}
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}
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