blocks should be written 'safely,' i.e. wrapped in CDATA blocks
*
* @var boolean
* @access public
*/
var $safe = false;
/**
* HTML tags used by this helper.
*
* @var array
* @access public
*/
var $tags = array(
'javascriptstart' => '',
'javascriptblock' => '',
'javascriptlink' => ''
);
/**
* Holds options passed to codeBlock(), saved for when block is dumped to output
*
* @var array
* @access protected
* @see JavascriptHelper::codeBlock()
*/
var $_blockOptions = array();
/**
* Caches events written by event() for output at the end of page execution
*
* @var array
* @access protected
* @see JavascriptHelper::event()
*/
var $_cachedEvents = array();
/**
* Indicates whether generated events should be cached for later output (can be written at the
* end of the page, in the , or to an external file).
*
* @var boolean
* @access protected
* @see JavascriptHelper::event()
* @see JavascriptHelper::writeEvents()
*/
var $_cacheEvents = false;
/**
* Indicates whether cached events should be written to an external file
*
* @var boolean
* @access protected
* @see JavascriptHelper::event()
* @see JavascriptHelper::writeEvents()
*/
var $_cacheToFile = false;
/**
* Indicates whether *all* generated JavaScript should be cached for later output
*
* @var boolean
* @access protected
* @see JavascriptHelper::codeBlock()
* @see JavascriptHelper::blockEnd()
*/
var $_cacheAll = false;
/**
* Contains event rules attached with CSS selectors. Used with the event:Selectors JavaScript
* library.
*
* @var array
* @access protected
* @see JavascriptHelper::event()
* @link http://alternateidea.com/event-selectors/
*/
var $_rules = array();
/**
* @var string
* @access private
*/
var $__scriptBuffer = null;
/**
* Constructor. Checks for presence of native PHP JSON extension to use for object encoding
*
* @access public
*/
function __construct($options = array()) {
if (!empty($options)) {
foreach ($options as $key => $val) {
if (is_numeric($key)) {
$key = $val;
$val = true;
}
switch ($key) {
case 'cache':
break;
case 'safe':
$this->safe = $val;
break;
}
}
}
$this->useNative = function_exists('json_encode');
return parent::__construct($options);
}
/**
* Returns a JavaScript script tag.
*
* Options:
*
* - allowCache: boolean, designates whether this block is cacheable using the
* current cache settings.
* - safe: boolean, whether this block should be wrapped in CDATA tags. Defaults
* to helper's object configuration.
* - inline: whether the block should be printed inline, or written
* to cached for later output (i.e. $scripts_for_layout).
*
* @param string $script The JavaScript to be wrapped in SCRIPT tags.
* @param array $options Set of options:
* @return string The full SCRIPT element, with the JavaScript inside it, or null,
* if 'inline' is set to false.
*/
function codeBlock($script = null, $options = array()) {
if (!empty($options) && !is_array($options)) {
$options = array('allowCache' => $options);
} elseif (empty($options)) {
$options = array();
}
$defaultOptions = array('allowCache' => true, 'safe' => true, 'inline' => true);
$options = array_merge($defaultOptions, $options);
if (empty($script)) {
$this->__scriptBuffer = @ob_get_contents();
$this->_blockOptions = $options;
$this->inBlock = true;
@ob_end_clean();
ob_start();
return null;
}
if ($this->_cacheEvents && $this->_cacheAll && $options['allowCache']) {
$this->_cachedEvents[] = $script;
return null;
}
if ($options['safe'] || $this->safe) {
$script = "\n" . '//' . "\n";
}
if ($options['inline']) {
return sprintf($this->tags['javascriptblock'], $script);
} else {
$view =& ClassRegistry::getObject('view');
$view->addScript(sprintf($this->tags['javascriptblock'], $script));
}
}
/**
* Ends a block of cached JavaScript code
*
* @return mixed
*/
function blockEnd() {
if (!isset($this->inBlock) || !$this->inBlock) {
return;
}
$script = @ob_get_contents();
@ob_end_clean();
ob_start();
echo $this->__scriptBuffer;
$this->__scriptBuffer = null;
$options = $this->_blockOptions;
$this->_blockOptions = array();
$this->inBlock = false;
if (empty($script)) {
return null;
}
return $this->codeBlock($script, $options);
}
/**
* Returns a JavaScript include tag (SCRIPT element). If the filename is prefixed with "/",
* the path will be relative to the base path of your application. Otherwise, the path will
* be relative to your JavaScript path, usually webroot/js.
*
* @param mixed $url String URL to JavaScript file, or an array of URLs.
* @param boolean $inline If true, the tag will be printed inline,
* otherwise it will be printed in the