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<?php /** * "Inline" diff renderer. * * $Horde: framework/Text_Diff/Diff/Renderer/inline.php,v 1.4.10.16 2009/07/24 13:25:29 jan Exp $ * * Copyright 2004-2009 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 */ require_once 'Text/Diff/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. */ $diff = new Text_Diff('native', array($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); }
}
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