<?php

/**

 * "Unified" diff renderer.

 *

 * This class renders the diff in classic "unified diff" format.

 *

 * $Horde: framework/Text_Diff/Diff/Renderer/unified.php,v 1.5 2006/01/08 00:06:57 jan Exp $

 *

 * @package Text_Diff

 */

class Text_Diff_Renderer_unified 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 _blockHeader($xbeg, $xlen, $ybeg, $ylen)

		{

				if ($xlen != 1) {

						$xbeg .= ',' . $xlen;

				}

				if ($ylen != 1) {

						$ybeg .= ',' . $ylen;

				}

				return "@@ -$xbeg +$ybeg @@";

		}

		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);

		}

}