head.php

Joomla!是一套获得过多个奖项的内容管理系统(Content Management System, CMS)。Joomla!采用PHP+MySQL数据库开发

<?php
/**
* @version		$Id: head.php 10707 2008-08-21 09:52:47Z eddieajau $
* @package		Joomla.Framework
* @subpackage	Document
* @copyright	Copyright (C) 2005 - 2008 Open Source Matters. All rights reserved.
* @license		GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/

// Check to ensure this file is within the rest of the framework
defined('JPATH_BASE') or die();

/**
 * JDocument head renderer
 *
 * @package		Joomla.Framework
 * @subpackage	Document
 * @since		1.5
 */
class JDocumentRendererHead extends JDocumentRenderer
{
	/**
	 * Renders the document head and returns the results as a string
	 *
	 * @access public
	 * @param string 	$name		(unused)
	 * @param array 	$params		Associative array of values
	 * @return string	The output of the script
	 */
	function render( $head = null, $params = array(), $content = null )
	{
		ob_start();

		echo $this->fetchHead($this->_doc);

		$contents = ob_get_contents();
		ob_end_clean();

		return $contents;
	}

	/**
	 * Generates the head html and return the results as a string
	 *
	 * @access public
	 * @return string
	 */
	function fetchHead(&$document)
	{
		// get line endings
		$lnEnd = $document->_getLineEnd();
		$tab = $document->_getTab();

		$tagEnd	= ' />';

		$strHtml = '';

		// Generate base tag (need to happen first)
		$base = $document->getBase();
		if(!empty($base)) {
			$strHtml .= $tab.'<base href="'.$document->getBase().'" />'.$lnEnd;
		}

		// Generate META tags (needs to happen as early as possible in the head)
		foreach ($document->_metaTags as $type => $tag)
		{
			foreach ($tag as $name => $content)
			{
				if ($type == 'http-equiv') {
					$strHtml .= $tab.'<meta http-equiv="'.$name.'" content="'.$content.'"'.$tagEnd.$lnEnd;
				} elseif ($type == 'standard') {
					$strHtml .= $tab.'<meta name="'.$name.'" content="'.$content.'"'.$tagEnd.$lnEnd;
				}
			}
		}

		$strHtml .= $tab.'<meta name="description" content="'.$document->getDescription().'" />'.$lnEnd;
		$strHtml .= $tab.'<meta name="generator" content="'.$document->getGenerator().'" />'.$lnEnd;

		$strHtml .= $tab.'<title>'.htmlspecialchars($document->getTitle()).'</title>'.$lnEnd;

		// Generate link declarations
		foreach ($document->_links as $link) {
			$strHtml .= $tab.$link.$tagEnd.$lnEnd;
		}

		// Generate stylesheet links
		foreach ($document->_styleSheets as $strSrc => $strAttr )
		{
			$strHtml .= $tab . '<link rel="stylesheet" href="'.$strSrc.'" type="'.$strAttr['mime'].'"';
			if (!is_null($strAttr['media'])){
				$strHtml .= ' media="'.$strAttr['media'].'" ';
			}
			if ($temp = JArrayHelper::toString($strAttr['attribs'])) {
				$strHtml .= ' '.$temp;;
			}
			$strHtml .= $tagEnd.$lnEnd;
		}

		// Generate stylesheet declarations
		foreach ($document->_style as $type => $content)
		{
			$strHtml .= $tab.'<style type="'.$type.'">'.$lnEnd;

			// This is for full XHTML support.
			if ($document->_mime == 'text/html' ) {
				$strHtml .= $tab.$tab.'<!--'.$lnEnd;
			} else {
				$strHtml .= $tab.$tab.'<![CDATA['.$lnEnd;
			}

			$strHtml .= $content . $lnEnd;

			// See above note
			if ($document->_mime == 'text/html' ) {
				$strHtml .= $tab.$tab.'-->'.$lnEnd;
			} else {
				$strHtml .= $tab.$tab.']]>'.$lnEnd;
			}
			$strHtml .= $tab.'</style>'.$lnEnd;
		}

		// Generate script file links
		foreach ($document->_scripts as $strSrc => $strType) {
			$strHtml .= $tab.'<script type="'.$strType.'" src="'.$strSrc.'"></script>'.$lnEnd;
		}

		// Generate script declarations
		foreach ($document->_script as $type => $content)
		{
			$strHtml .= $tab.'<script type="'.$type.'">'.$lnEnd;

			// This is for full XHTML support.
			if ($document->_mime != 'text/html' ) {
				$strHtml .= $tab.$tab.'<![CDATA['.$lnEnd;
			}

			$strHtml .= $content.$lnEnd;

			// See above note
			if ($document->_mime != 'text/html' ) {
				$strHtml .= $tab.$tab.'// ]]>'.$lnEnd;
			}
			$strHtml .= $tab.'</script>'.$lnEnd;
		}

		foreach($document->_custom as $custom) {
			$strHtml .= $tab.$custom.$lnEnd;
		}

		return $strHtml;
	}
}