CWikiParser::processToc

function processToc($text)
{
	$matches = array();
	$sToc = '';
	if (preg_match_all('/d)(?.*)>(?.*)>/isU'.BX_UTF_PCRE_MODIFIER, $text, $matches, PREG_SET_ORDER))
	{
		if (count($matches) > 4)
		{
			$iCurrentToc = 1;
			// work level TOC
			$iCurrentTocLevel = 0;
			// previous user defined level of TOC
			$iRealPrevItemTocLevel = 1;
			// previous working level of TOC
			$iPrevItemTocLevel = 0;
			// current user defined the level of TOC
			$iRealItemTocLevel = 1;

			$bfirst = true;
			$aNumToc = array();
			foreach ($matches as $_m =>  $arMatch)
			{
				$iRealItemTocLevel = (int)$arMatch['level'];
				$sItemToc = trim($arMatch['innerHtml']);
				// normalize levels
				if ($bfirst && $iRealPrevItemTocLevel < $iRealItemTocLevel)
					$iItemTocLevel = 1;
				else if ($iCurrentTocLevel == 1 && $iRealItemTocLevel < $iRealPrevItemTocLevel)
					$iItemTocLevel = $iCurrentTocLevel;
				else if ($iRealItemTocLevel > $iRealPrevItemTocLevel)
					$iItemTocLevel = $iCurrentTocLevel + 1;
				else if ($iRealItemTocLevel < $iRealPrevItemTocLevel)
				{
					$_delta = $iRealPrevItemTocLevel - $iRealItemTocLevel;
					$iItemTocLevel = $iCurrentTocLevel - $_delta;
					if ($iItemTocLevel < 1)
						$iItemTocLevel = 1;
				}
				else
					$iItemTocLevel = $iCurrentTocLevel;

				// create a numbering of TOC
				$iCurrentNumTocLevel = $bfirst ? 1 : $iItemTocLevel;
				$aNumToc[$iCurrentNumTocLevel] =  !isset($aNumToc[$iCurrentNumTocLevel]) ? 1 : $aNumToc[$iCurrentNumTocLevel] + 1;
				if ($iItemTocLevel < $iPrevItemTocLevel)
				{
					for ($i = $iItemTocLevel + 1; $i <= $iPrevItemTocLevel; $i++)
						unset($aNumToc[$i]);
				}

				// build a TOC
				if ($iItemTocLevel > $iCurrentTocLevel || empty($sToc))
				{
					$iCurrentTocLevel++;
					$sToc .= '
';
				}
				else if ($iItemTocLevel < $iCurrentTocLevel)
				{
					if ($iItemTocLevel <= 0)
						$iItemTocLevel = 1;

					if ($iCurrentTocLevel > 1)
					{
						for ($i = 0; $i < ($iCurrentTocLevel - $iItemTocLevel); $i++)
							$sToc .= '
';
					}
					else
						$sToc .= '';

					if ($iCurrentTocLevel > 1)
						$iCurrentTocLevel = $iItemTocLevel;

				}

				$iRealPrevItemTocLevel = $iRealItemTocLevel;
				$iPrevItemTocLevel = $iItemTocLevel;
				$bfirst = false;
				$sNumToc = implode('.', $aNumToc);
				$sItemTocId = str_replace(array('%', '+', '.F2', '..'), array('.', '.', '_', '.'), rawurlencode($sItemToc.$sNumToc));
				$sToc .= '
'.$sNumToc.' '.strip_tags($sItemToc).'
';
				$matches[$_m]['innerHtml'] = $sItemToc;
				$matches[$_m]['tocId'] = $sItemTocId;
			}

			for ($i = $iCurrentTocLevel; $i > 0; $i--)
				$sToc .= '';

			$bfirst = true;
			foreach ($matches as $arMatch)
			{
				$sReplase = ''.$arMatch['innerHtml'].'';
				if ($bfirst)
					$sReplase = $sToc.'
'.$sReplase;
				// so as not to replace all of the same titles
				$text = preg_replace('/'.preg_quote($arMatch[0], '/').'/'.BX_UTF_PCRE_MODIFIER, $sReplase, $text, 1);
				$bfirst = false;
			}
		}
	}

	return $text;
}