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<?php
/**
* @version $Id: document.php 14401 2010-01-26 14:10:00Z louis $
* @package Joomla.Framework
* @subpackage Document
* @copyright Copyright (C) 2005 - 2010 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();
//Register the renderer class with the loader
JLoader::register('JDocumentRenderer', dirname(__FILE__).DS.'renderer.php');
/**
* Document class, provides an easy interface to parse and display a document
*
* @abstract
* @package Joomla.Framework
* @subpackage Document
* @since 1.5
*/
class JDocument extends JObject
{
/**
* Document title
*
* @var string
* @access public
*/
var $title = '';
/**
* Document description
*
* @var string
* @access public
*/
var $description = '';
/**
* Document full URL
*
* @var string
* @access public
*/
var $link = '';
/**
* Document base URL
*
* @var string
* @access public
*/
var $base = '';
/**
* Contains the document language setting
*
* @var string
* @access public
*/
var $language = 'en-gb';
/**
* Contains the document direction setting
*
* @var string
* @access public
*/
var $direction = 'ltr';
/**
* Document generator
*
* @var string
* @access public
*/
var $_generator = 'Joomla! 1.5 - Open Source Content Management';
/**
* Document modified date
*
* @var string
* @access private
*/
var $_mdate = '';
/**
* Tab string
*
* @var string
* @access private
*/
var $_tab = "\11";
/**
* Contains the line end string
*
* @var string
* @access private
*/
var $_lineEnd = "\12";
/**
* Contains the character encoding string
*
* @var string
* @access private
*/
var $_charset = 'utf-8';
/**
* Document mime type
*
* @var string
* @access private
*/
var $_mime = '';
/**
* Document namespace
*
* @var string
* @access private
*/
var $_namespace = '';
/**
* Document profile
*
* @var string
* @access private
*/
var $_profile = '';
/**
* Array of linked scripts
*
* @var array
* @access private
*/
var $_scripts = array();
/**
* Array of scripts placed in the header
*
* @var array
* @access private
*/
var $_script = array();
/**
* Array of linked style sheets
*
* @var array
* @access private
*/
var $_styleSheets = array();
/**
* Array of included style declarations
*
* @var array
* @access private
*/
var $_style = array();
/**
* Array of meta tags
*
* @var array
* @access private
*/
var $_metaTags = array();
/**
* The rendering engine
*
* @var object
* @access private
*/
var $_engine = null;
/**
* The document type
*
* @var string
* @access private
*/
var $_type = null;
/**
* Array of buffered output
*
* @var mixed (depends on the renderer)
* @access private
*/
var $_buffer = null;
/**
* Class constructor
*
* @access protected
* @param array $options Associative array of options
*/
function __construct( $options = array())
{
parent::__construct();
if (array_key_exists('lineend', $options)) {
$this->setLineEnd($options['lineend']);
}
if (array_key_exists('charset', $options)) {
$this->setCharset($options['charset']);
}
if (array_key_exists('language', $options)) {
$this->setLanguage($options['language']);
}
if (array_key_exists('direction', $options)) {
$this->setDirection($options['direction']);
}
if (array_key_exists('tab', $options)) {
$this->setTab($options['tab']);
}
if (array_key_exists('link', $options)) {
$this->setLink($options['link']);
}
if (array_key_exists('base', $options)) {
$this->setBase($options['base']);
}
}
/**
* Returns a reference to the global JDocument object, only creating it
* if it doesn't already exist.
*
* This method must be invoked as:
* <pre> $document = &JDocument::getInstance();</pre>
*
* @access public
* @param type $type The document type to instantiate
* @return object The document object.
*/
function &getInstance($type = 'html', $attributes = array())
{
static $instances;
if (!isset( $instances )) {
$instances = array();
}
$signature = serialize(array($type, $attributes));
if (empty($instances[$signature]))
{
$type = preg_replace('/[^A-Z0-9_\.-]/i', '', $type);
$path = dirname(__FILE__).DS.$type.DS.$type.'.php';
$ntype = null;
// Check if the document type exists
if ( ! file_exists($path))
{
// Default to the raw format
$ntype = $type;
$type = 'raw';
}
// Determine the path and class
$class = 'JDocument'.$type;
if(!class_exists($class))
{
$path = dirname(__FILE__).DS.$type.DS.$type.'.php';
if (file_exists($path)) {
require_once($path);
} else {
JError::raiseError(500,JText::_('Unable to load document class'));
}
}
$instance = new $class($attributes);
$instances[$signature] =& $instance;
if ( !is_null($ntype) )
{
// Set the type to the Document type originally requested
$instance->setType($ntype);
}
}
return $instances[$signature];
}
/**
* Set the document type
*
* @access public
* @param string $type
*/
function setType($type) {
$this->_type = $type;
}
/**
* Returns the document type
*
* @access public
* @return string
*/
function getType() {
return $this->_type;
}
/**
* Get the document head data
*
* @access public
* @return array The document head data in array form
*/
function getHeadData() {
// Impelemented in child classes
}
/**
* Set the document head data
*
* @access public
* @param array $data The document head data in array form
*/
function setHeadData($data) {
// Impelemented in child classes
}
/**
* Get the contents of the document buffer
*
* @access public
* @return The contents of the document buffer
*/
function getBuffer() {
return $this->_buffer;
}
/**
* Set the contents of the document buffer
*
* @access public
* @param string $content The content to be set in the buffer
*/
function setBuffer($content) {
$this->_buffer = $content;
}
/**
* Gets a meta tag.
*
* @param string $name Value of name or http-equiv tag
* @param bool $http_equiv META type "http-equiv" defaults to null
* @return string
* @access public
*/
function getMetaData($name, $http_equiv = false)
{
$result = '';
$name = strtolower($name);
if($name == 'generator') {
$result = $this->getGenerator();
} elseif($name == 'description') {
$result = $this->getDescription();
} else {
if ($http_equiv == true) {
$result = @$this->_metaTags['http-equiv'][$name];
} else {
$result = @$this->_metaTags['standard'][$name];
}
}
return $result;
}
/**
* Sets or alters a meta tag.
*
* @param string $name Value of name or http-equiv tag
* @param string $content Value of the content tag
* @param bool $http_equiv META type "http-equiv" defaults to null
* @return void
* @access public
*/
function setMetaData($name, $content, $http_equiv = false)
{
$name = strtolower($name);
if($name == 'generator') {
$this->setGenerator($content);
} elseif($name == 'description') {
$this->setDescription($content);
} else {
if ($http_equiv == true) {
$this->_metaTags['http-equiv'][$name] = $content;
} else {
$this->_metaTags['standard'][$name] = $content;
}
}
}
/**
* Adds a linked script to the page
*
* @param string $url URL to the linked script
* @param string $type Type of script. Defaults to 'text/javascript'
* @access public
*/
function addScript($url, $type="text/javascript") {
$this->_scripts[$url] = $type;
}
/**
* Adds a script to the page
*
* @access public
* @param string $content Script
* @param string $type Scripting mime (defaults to 'text/javascript')
* @return void
*/
function addScriptDeclaration($content, $type = 'text/javascript')
{
if (!isset($this->_script[strtolower($type)])) {
$this->_script[strtolower($type)] = $content;
} else {
$this->_script[strtolower($type)] .= chr(13).$content;
}
}
/**
* Adds a linked stylesheet to the page
*
* @param string $url URL to the linked style sheet
* @param string $type Mime encoding type
* @param string $media Media type that this stylesheet applies to
* @access public
*/
function addStyleSheet($url, $type = 'text/css', $media = null, $attribs = array())
{
$this->_styleSheets[$url]['mime'] = $type;
$this->_styleSheets[$url]['media'] = $media;
$this->_styleSheets[$url]['attribs'] = $attribs;
}
/**
* Adds a stylesheet declaration to the page
*
* @param string $content Style declarations
* @param string $type Type of stylesheet (defaults to 'text/css')
* @access public
* @return void
*/
function addStyleDeclaration($content, $type = 'text/css')
{
if (!isset($this->_style[strtolower($type)])) {
$this->_style[strtolower($type)] = $content;
} else {
$this->_style[strtolower($type)] .= chr(13).$content;
}
}
/**
* Sets the document charset
*
* @param string $type Charset encoding string
* @access public
* @return void
*/
function setCharset($type = 'utf-8') {
$this->_charset = $type;
}
/**
* Returns the document charset encoding.
*
* @access public
* @return string
*/
function getCharset() {
return $this->_charset;
}
/**
* Sets the global document language declaration. Default is English (en-gb).
*
* @access public
* @param string $lang
*/
function setLanguage($lang = "en-gb") {
$this->language = strtolower($lang);
}
/**
* Returns the document language.
*
* @return string
* @access public
*/
function getLanguage() {
return $this->language;
}
/**
* Sets the global document direction declaration. Default is left-to-right (ltr).
*
* @access public
* @param string $lang
*/
function setDirection($dir = "ltr") {
$this->direction = strtolower($dir);
}
/**
* Returns the document language.
*
* @return string
* @access public
*/
function getDirection() {
return $this->direction;
}
/**
* Sets the title of the document
*
* @param string $title
* @access public
*/
function setTitle($title) {
$this->title = $title;
}
/**
* Return the title of the document.
*
* @return string
* @access public
*/
function getTitle() {
return $this->title;
}
/**
* Sets the base URI of the document
*
* @param string $base
* @access public
*/
function setBase($base) {
$this->base = $base;
}
/**
* Return the base URI of the document.
*
* @return string
* @access public
*/
function getBase() {
return $this->base;
}
/**
* Sets the description of the document
*
* @param string $title
* @access public
*/
function setDescription($description) {
$this->description = $description;
}
/**
* Return the title of the page.
*
* @return string
* @access public
*/
function getDescription() {
return $this->description;
}
/**
* Sets the document link
*
* @param string $url A url
* @access public
* @return void
*/
function setLink($url) {
$this->link = $url;
}
/**
* Returns the document base url
*
* @access public
* @return string
*/
function getLink() {
return $this->link;
}
/**
* Sets the document generator
*
* @param string
* @access public
* @return void
*/
function setGenerator($generator) {
$this->_generator = $generator;
}
/**
* Returns the document generator
*
* @access public
* @return string
*/
function getGenerator() {
return $this->_generator;
}
/**
* Sets the document modified date
*
* @param string
* @access public
* @return void
*/
function setModifiedDate($date) {
$this->_mdate = $date;
}
/**
* Returns the document modified date
*
* @access public
* @return string
*/
function getModifiedDate() {
return $this->_mdate;
}
/**
* Sets the document MIME encoding that is sent to the browser.
*
* <p>This usually will be text/html because most browsers cannot yet
* accept the proper mime settings for XHTML: application/xhtml+xml
* and to a lesser extent application/xml and text/xml. See the W3C note
* ({@link http://www.w3.org/TR/xhtml-media-types/
* http://www.w3.org/TR/xhtml-media-types/}) for more details.</p>
*
* @param string $type
* @access public
* @return void
*/
function setMimeEncoding($type = 'text/html') {
$this->_mime = strtolower($type);
}
/**
* Sets the line end style to Windows, Mac, Unix or a custom string.
*
* @param string $style "win", "mac", "unix" or custom string.
* @access public
* @return void
*/
function setLineEnd($style)
{
switch ($style) {
case 'win':
$this->_lineEnd = "\15\12";
break;
case 'unix':
$this->_lineEnd = "\12";
break;
case 'mac':
$this->_lineEnd = "\15";
break;
default:
$this->_lineEnd = $style;
}
}
/**
* Returns the lineEnd
*
* @access private
* @return string
*/
function _getLineEnd() {
return $this->_lineEnd;
}
/**
* Sets the string used to indent HTML
*
* @param string $string String used to indent ("\11", "\t", ' ', etc.).
* @access public
* @return void
*/
function setTab($string) {
$this->_tab = $string;
}
/**
* Returns a string containing the unit for indenting HTML
*
* @access private
* @return string
*/
function _getTab() {
return $this->_tab;
}
/**
* Load a renderer
*
* @access public
* @param string The renderer type
* @return object
* @since 1.5
*/
function &loadRenderer( $type )
{
$null = null;
$class = 'JDocumentRenderer'.$type;
if( !class_exists( $class ) )
{
$path = dirname(__FILE__).DS.$this->_type.DS.'renderer'.DS.$type.'.php';
if(file_exists($path)) {
require_once($path);
} else {
JError::raiseError(500,JText::_('Unable to load renderer class'));
}
}
if ( !class_exists( $class ) ) {
return $null;
}
$instance = new $class($this);
return $instance;
}
/**
* Outputs the document
*
* @access public
* @param boolean $cache If true, cache the output
* @param boolean $compress If true, compress the output
* @param array $params Associative array of attributes
* @return The rendered data
*/
function render( $cache = false, $params = array())
{
JResponse::setHeader( 'Expires', gmdate( 'D, d M Y H:i:s', time() + 900 ) . ' GMT' );
if ($mdate = $this->getModifiedDate()) {
JResponse::setHeader( 'Last-Modified', $mdate /* gmdate( 'D, d M Y H:i:s', time() + 900 ) . ' GMT' */ );
}
JResponse::setHeader( 'Content-Type', $this->_mime . '; charset=' . $this->_charset);
}
}