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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_View
* @subpackage Helper
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @version $Id: HeadMeta.php 16971 2009-07-22 18:05:45Z mikaelkael $
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/** Zend_View_Helper_Placeholder_Container_Standalone */
require_once 'Zend/View/Helper/Placeholder/Container/Standalone.php';
/**
* Zend_Layout_View_Helper_HeadMeta
*
* @see http://www.w3.org/TR/xhtml1/dtds.html
* @uses Zend_View_Helper_Placeholder_Container_Standalone
* @package Zend_View
* @subpackage Helper
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_View_Helper_HeadMeta extends Zend_View_Helper_Placeholder_Container_Standalone
{
/**
* Types of attributes
* @var array
*/
protected $_typeKeys = array('name', 'http-equiv');
protected $_requiredKeys = array('content');
protected $_modifierKeys = array('lang', 'scheme');
/**
* @var string registry key
*/
protected $_regKey = 'Zend_View_Helper_HeadMeta';
/**
* Constructor
*
* Set separator to PHP_EOL
*
* @return void
*/
public function __construct()
{
parent::__construct();
$this->setSeparator(PHP_EOL);
}
/**
* Retrieve object instance; optionally add meta tag
*
* @param string $content
* @param string $keyValue
* @param string $keyType
* @param array $modifiers
* @param string $placement
* @return Zend_View_Helper_HeadMeta
*/
public function headMeta($content = null, $keyValue = null, $keyType = 'name', $modifiers = array(), $placement = Zend_View_Helper_Placeholder_Container_Abstract::APPEND)
{
if ((null !== $content) && (null !== $keyValue)) {
$item = $this->createData($keyType, $keyValue, $content, $modifiers);
$action = strtolower($placement);
switch ($action) {
case 'append':
case 'prepend':
case 'set':
$this->$action($item);
break;
default:
$this->append($item);
break;
}
}
return $this;
}
protected function _normalizeType($type)
{
switch ($type) {
case 'Name':
return 'name';
case 'HttpEquiv':
return 'http-equiv';
default:
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception(sprintf('Invalid type "%s" passed to _normalizeType', $type));
}
}
/**
* Overload method access
*
* Allows the following 'virtual' methods:
* - appendName($keyValue, $content, $modifiers = array())
* - offsetGetName($index, $keyValue, $content, $modifers = array())
* - prependName($keyValue, $content, $modifiers = array())
* - setName($keyValue, $content, $modifiers = array())
* - appendHttpEquiv($keyValue, $content, $modifiers = array())
* - offsetGetHttpEquiv($index, $keyValue, $content, $modifers = array())
* - prependHttpEquiv($keyValue, $content, $modifiers = array())
* - setHttpEquiv($keyValue, $content, $modifiers = array())
*
* @param string $method
* @param array $args
* @return Zend_View_Helper_HeadMeta
*/
public function __call($method, $args)
{
if (preg_match('/^(?P<action>set|(pre|ap)pend|offsetSet)(?P<type>Name|HttpEquiv)$/', $method, $matches)) {
$action = $matches['action'];
$type = $this->_normalizeType($matches['type']);
$argc = count($args);
$index = null;
if ('offsetSet' == $action) {
if (0 < $argc) {
$index = array_shift($args);
--$argc;
}
}
if (2 > $argc) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('Too few arguments provided; requires key value, and content');
}
if (3 > $argc) {
$args[] = array();
}
$item = $this->createData($type, $args[0], $args[1], $args[2]);
if ('offsetSet' == $action) {
return $this->offsetSet($index, $item);
}
if ($action == 'set') {
//var_dump($this->getContainer());
}
$this->$action($item);
return $this;
}
return parent::__call($method, $args);
}
/**
* Determine if item is valid
*
* @param mixed $item
* @return boolean
*/
protected function _isValid($item)
{
if ((!$item instanceof stdClass)
|| !isset($item->type)
|| !isset($item->content)
|| !isset($item->modifiers))
{
return false;
}
return true;
}
/**
* Append
*
* @param string $value
* @return void
* @throws Zend_View_Exception
*/
public function append($value)
{
if (!$this->_isValid($value)) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('Invalid value passed to append; please use appendMeta()');
}
return $this->getContainer()->append($value);
}
/**
* OffsetSet
*
* @param string|int $index
* @param string $value
* @return void
* @throws Zend_View_Exception
*/
public function offsetSet($index, $value)
{
if (!$this->_isValid($value)) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('Invalid value passed to offsetSet; please use offsetSetMeta()');
}
return $this->getContainer()->offsetSet($index, $value);
}
/**
* OffsetUnset
*
* @param string|int $index
* @return void
* @throws Zend_View_Exception
*/
public function offsetUnset($index)
{
if (!in_array($index, $this->getContainer()->getKeys())) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('Invalid index passed to offsetUnset.');
}
return $this->getContainer()->offsetUnset($index);
}
/**
* Prepend
*
* @param string $value
* @return void
* @throws Zend_View_Exception
*/
public function prepend($value)
{
if (!$this->_isValid($value)) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('Invalid value passed to prepend; please use prependMeta()');
}
return $this->getContainer()->prepend($value);
}
/**
* Set
*
* @param string $value
* @return void
* @throws Zend_View_Exception
*/
public function set($value)
{
if (!$this->_isValid($value)) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception('Invalid value passed to set; please use setMeta()');
}
$container = $this->getContainer();
foreach ($container->getArrayCopy() as $index => $item) {
if ($item->type == $value->type && $item->{$item->type} == $value->{$value->type}) {
$this->offsetUnset($index);
}
}
return $this->append($value);
}
/**
* Build meta HTML string
*
* @param string $type
* @param string $typeValue
* @param string $content
* @param array $modifiers
* @return string
*/
public function itemToString(stdClass $item)
{
if (!in_array($item->type, $this->_typeKeys)) {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception(sprintf('Invalid type "%s" provided for meta', $item->type));
}
$type = $item->type;
$modifiersString = '';
foreach ($item->modifiers as $key => $value) {
if (!in_array($key, $this->_modifierKeys)) {
continue;
}
$modifiersString .= $key . '="' . $this->_escape($value) . '" ';
}
if ($this->view instanceof Zend_View_Abstract) {
$tpl = ($this->view->doctype()->isXhtml())
? '<meta %s="%s" content="%s" %s/>'
: '<meta %s="%s" content="%s" %s>';
} else {
$tpl = '<meta %s="%s" content="%s" %s/>';
}
$meta = sprintf(
$tpl,
$type,
$this->_escape($item->$type),
$this->_escape($item->content),
$modifiersString
);
return $meta;
}
/**
* Render placeholder as string
*
* @param string|int $indent
* @return string
*/
public function toString($indent = null)
{
$indent = (null !== $indent)
? $this->getWhitespace($indent)
: $this->getIndent();
$items = array();
$this->getContainer()->ksort();
try {
foreach ($this as $item) {
$items[] = $this->itemToString($item);
}
} catch (Zend_View_Exception $e) {
trigger_error($e->getMessage(), E_USER_WARNING);
return '';
}
return $indent . implode($this->_escape($this->getSeparator()) . $indent, $items);
}
/**
* Create data item for inserting into stack
*
* @param string $type
* @param string $typeValue
* @param string $content
* @param array $modifiers
* @return stdClass
*/
public function createData($type, $typeValue, $content, array $modifiers)
{
$data = new stdClass;
$data->type = $type;
$data->$type = $typeValue;
$data->content = $content;
$data->modifiers = $modifiers;
return $data;
}
}
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