archived-web-bugs/include/classes/bug_diff_renderer.php

<?php

/**
 * "Unified" diff renderer.
 *
 * This class renders the diff in classic "unified diff" format.
 *
 * $Horde: framework/Text_Diff/Diff/Renderer/unified.php,v 1.2 2004/01/09 21:46:30 chuck Exp $
 *
 * @package Text_Diff
 */

require_once 'Text/Diff.php';
require_once 'Text/Diff/Renderer.php';

class Bug_Diff_Renderer extends Text_Diff_Renderer
{
	// Number of leading context "lines" to preserve.
	var $_leading_context_lines = 4;

	// Number of trailing context "lines" to preserve.
	var $_trailing_context_lines = 4;

	function __construct($d)
	{
		$this->diff = $d;
		parent::Text_Diff_Renderer();
	}

	function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
	{
		$removed = $xlen - $ylen;
		if ($removed > 0) {
			return '<span class="diffheader">Line ' . $xbeg . ' (now ' . $ybeg . '), was ' . $xlen . ' lines, now ' . $ylen . ' lines</span>';
		}
	}

	function _added($lines)
	{
		array_walk($lines, create_function('&$a,$b', '$a=htmlspecialchars($a);'));
		return '<span class="newdiff"> ' . implode("</span>\n<span class='newdiff'> ", $lines) . '</span>';
	}

	function _context($lines)
	{
		array_walk($lines, create_function('&$a,$b', '$a=htmlspecialchars($a);'));
		return "\n" . parent::_context($lines);
	}
	
	function _deleted($lines)
	{
		array_walk($lines, create_function('&$a,$b', '$a=htmlspecialchars($a);'));
		return '<span class="olddiff"> ' . implode("</span>\n<span class='olddiff'> ", $lines) . '</span>';
	}

	function _changed($orig, $final)
	{
		return $this->_deleted($orig) . "\n" . $this->_added($final);
	}

	function render()
	{
		return parent::render($this->diff);
	}
}