<?php



/**

 * This file is part of the Nette Framework (http://nette.org)

 *

 * Copyright (c) 2004, 2011 David Grudl (http://davidgrudl.com)

 *

 * For the full copyright and license information, please view

 * the file license.txt that was distributed with this source code.

 */



namespace Nette\Diagnostics;



use Nette;







/**

 * Red BlueScreen.

 *

 * @author     David Grudl

 * @internal

 */

class BlueScreen extends Nette\Object

{

	/** @var array */

	private $panels = array();







	/**

	 * Add custom panel.

	 * @param  callback

	 * @param  string

	 * @return void

	 */

	public function addPanel($panel, $id = NULL)

	{

		if ($id === NULL) {

			$this->panels[] = $panel;

		} else {

			$this->panels[$id] = $panel;

		}

	}







	/**

	 * Renders blue screen.

	 * @param  \Exception

	 * @return void

	 */

	public function render(\Exception $exception)

	{

		$panels = $this->panels;

		require __DIR__ . '/templates/bluescreen.phtml';

	}







	/**

	 * Returns syntax highlighted source code.

	 * @param  string

	 * @param  int

	 * @param  int

	 * @return string

	 */

	public static function highlightFile($file, $line, $count = 15, $vars = array())

	{

		if (function_exists('ini_set')) {

			ini_set('highlight.comment', '#998; font-style: italic');

			ini_set('highlight.default', '#000');

			ini_set('highlight.html', '#06B');

			ini_set('highlight.keyword', '#D24; font-weight: bold');

			ini_set('highlight.string', '#080');

		}



		$start = max(1, $line - floor($count / 2));



		$source = @file_get_contents($file); // intentionally @

		if (!$source) {

			return;

		}

		$source = explode("\n", highlight_string($source, TRUE));

		$spans = 1;

		$out = $source[0]; // <code><span color=highlight.html>

		$source = explode('<br />', $source[1]);

		array_unshift($source, NULL);



		$i = $start; // find last highlighted block

		while (--$i >= 1) {

			if (preg_match('#.*(</?span[^>]*>)#', $source[$i], $m)) {

				if ($m[1] !== '</span>') {

					$spans++; $out .= $m[1];

				}

				break;

			}

		}



		$source = array_slice($source, $start, $count, TRUE);

		end($source);

		$numWidth = strlen((string) key($source));



		foreach ($source as $n => $s) {

			$spans += substr_count($s, '<span') - substr_count($s, '</span');

			$s = str_replace(array("\r", "\n"), array('', ''), $s);

			preg_match_all('#<[^>]+>#', $s, $tags);

			if ($n === $line) {

				$out .= sprintf(

					"<span class='highlight'>%{$numWidth}s:    %s\n</span>%s",

					$n,

					strip_tags($s),

					implode('', $tags[0])

				);

			} else {

				$out .= sprintf("<span class='line'>%{$numWidth}s:</span>    %s\n", $n, $s);

			}

		}

		$out .= str_repeat('</span>', $spans) . '</code>';



		$out = preg_replace_callback('#">\$(\w+)(&nbsp;)?</span>#', function($m) use ($vars) {

			return isset($vars[$m[1]])

				? '" title="' . str_replace('"', '&quot;', strip_tags(Helpers::htmlDump($vars[$m[1]]))) . $m[0]

				: $m[0];

		}, $out);



		return $out;

	}



}