2005-08-21 06:49:02 +00:00
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<?php
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/* SVN FILE: $Id$ */
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/**
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* Javascript Helper class file.
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*
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* PHP versions 4 and 5
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*
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2007-02-02 10:39:45 +00:00
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* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
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* Copyright 2005-2007, Cake Software Foundation, Inc.
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2006-05-26 05:29:17 +00:00
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* 1785 E. Sahara Avenue, Suite 490-204
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* Las Vegas, Nevada 89104
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2005-08-21 06:49:02 +00:00
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*
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2005-12-23 21:57:26 +00:00
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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2005-08-21 06:49:02 +00:00
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*
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2006-01-12 16:55:46 +00:00
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* @filesource
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2007-02-02 10:39:45 +00:00
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* @copyright Copyright 2005-2007, Cake Software Foundation, Inc.
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* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
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2006-05-26 05:29:17 +00:00
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* @package cake
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* @subpackage cake.cake.libs.view.helpers
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2007-02-02 10:39:45 +00:00
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* @since CakePHP(tm) v 0.10.0.1076
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2006-05-26 05:29:17 +00:00
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* @version $Revision$
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* @modifiedby $LastChangedBy$
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* @lastmodified $Date$
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License
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2005-08-21 06:49:02 +00:00
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*/
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/**
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2005-09-07 01:52:45 +00:00
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* Javascript Helper class for easy use of JavaScript.
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2005-08-21 06:49:02 +00:00
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*
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2005-09-07 01:52:45 +00:00
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* JavascriptHelper encloses all methods needed while working with JavaScript.
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2005-08-21 06:49:02 +00:00
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*
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2006-05-26 05:29:17 +00:00
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* @package cake
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* @subpackage cake.cake.libs.view.helpers
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2005-08-21 06:49:02 +00:00
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*/
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2005-09-19 01:16:05 +00:00
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2006-10-27 21:40:34 +00:00
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class JavascriptHelper extends AppHelper {
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2006-06-14 18:02:37 +00:00
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2006-10-27 21:40:34 +00:00
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var $__scriptBuffer = null;
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2006-06-14 18:02:37 +00:00
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var $_cachedEvents = array();
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var $_cacheEvents = false;
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var $_cacheToFile = false;
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var $_cacheAll = false;
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var $_rules = array();
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2007-02-21 22:13:16 +00:00
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var $enabled = true;
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2006-06-29 05:30:56 +00:00
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var $safe = false;
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2006-11-22 03:51:21 +00:00
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/**
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* html tags used by this helper.
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*
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* @var array
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*/
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2007-01-27 17:41:32 +00:00
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var $tags = array(
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'javascriptblock' => '<script type="text/javascript">%s</script>',
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'javascriptstart' => '<script type="text/javascript">',
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'javascriptlink' => '<script type="text/javascript" src="%s"></script>',
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'javascriptend' => '</script>',
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);
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2005-10-03 04:48:00 +00:00
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2006-02-18 23:42:21 +00:00
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/**
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2005-12-27 03:33:44 +00:00
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* Returns a JavaScript script tag.
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*
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* @param string $script The JavaScript to be wrapped in SCRIPT tags.
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2006-06-14 18:02:37 +00:00
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* @param boolean $allowCache Allows the script to be cached if non-event caching is active
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2006-06-29 05:30:56 +00:00
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* @param boolean $safe Wraps the script in an HTML comment and a CDATA block
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2005-12-27 03:33:44 +00:00
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* @return string The full SCRIPT element, with the JavaScript inside it.
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*/
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2006-06-29 05:30:56 +00:00
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function codeBlock($script = null, $allowCache = true, $safe = false) {
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if ($this->_cacheEvents && $this->_cacheAll && $allowCache && $script !== null) {
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2006-06-14 18:02:37 +00:00
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$this->_cachedEvents[] = $script;
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} else {
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2006-06-29 05:30:56 +00:00
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$block = ($script !== null);
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2006-10-27 21:40:34 +00:00
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if (($safe || $this->safe) && !($this->_cacheAll && $allowCache)) {
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2006-06-29 05:30:56 +00:00
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$script = "\n" . '<!--//--><![CDATA[//><!--' . "\n" . $script;
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if ($block) {
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$script .= "\n" . '//--><!]]>' . "\n";
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}
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}
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2006-07-29 05:59:42 +00:00
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2006-10-27 21:40:34 +00:00
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if ($script === null && $this->_cacheAll && $allowCache) {
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$this->__scriptBuffer = @ob_get_contents();
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@ob_end_clean();
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ob_start();
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return null;
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}
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2006-06-29 05:30:56 +00:00
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if ($block) {
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return sprintf($this->tags['javascriptblock'], $script);
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} else {
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return sprintf($this->tags['javascriptstart'], $script);
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}
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2006-06-14 18:02:37 +00:00
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}
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}
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2006-02-18 23:42:21 +00:00
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/**
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2006-10-27 21:40:34 +00:00
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* Ends a block of cached JavaScript code
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*
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* @return mixed
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*/
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function blockEnd() {
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$script = @ob_get_contents();
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@ob_end_clean();
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ob_start();
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echo $this->__scriptBuffer;
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$this->__scriptBuffer = null;
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if (!empty($script)) {
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$this->_cachedEvents[] = $script;
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}
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2007-01-27 17:41:32 +00:00
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return $this->tags['javascriptend'];
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2006-10-27 21:40:34 +00:00
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}
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/**
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2005-12-27 03:33:44 +00:00
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* Returns a JavaScript include tag (SCRIPT element)
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*
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2006-11-10 18:31:27 +00:00
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* @param mixed $url String URL to JavaScript file, or an array of URLs.
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2006-08-28 15:40:19 +00:00
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* @param boolean $inline If true, the <script /> tag will be printed inline,
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* otherwise it will be printed in the <head />
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2005-12-27 03:33:44 +00:00
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* @return string
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*/
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2006-08-28 15:40:19 +00:00
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function link($url, $inline = true) {
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2006-11-10 18:31:27 +00:00
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if (is_array($url)) {
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$out = '';
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foreach ($url as $i) {
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$out .= "\n\t" . $this->link($i, $inline);
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}
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if ($inline) {
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return $out . "\n";
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}
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return;
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}
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2006-06-27 10:35:02 +00:00
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if (strpos($url, '.') === false && strpos($url, '?') === false) {
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$url .= '.js';
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2006-06-14 18:02:37 +00:00
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}
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2006-06-27 10:35:02 +00:00
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if (strpos($url, '://') === false) {
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2007-02-08 07:42:23 +00:00
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$url = $this->webroot(JS_URL . $url);
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2006-06-27 10:35:02 +00:00
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}
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2006-08-28 15:40:19 +00:00
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$out = $this->output(sprintf($this->tags['javascriptlink'], $url));
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if ($inline) {
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return $out;
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} else {
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2006-12-27 09:34:45 +00:00
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$view =& ClassRegistry::getObject('view');
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2006-11-25 08:55:16 +00:00
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$view->addScript($out);
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2006-08-28 15:40:19 +00:00
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}
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2006-06-14 18:02:37 +00:00
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}
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2006-02-18 23:42:21 +00:00
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/**
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2005-12-27 03:33:44 +00:00
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* Returns a JavaScript include tag for an externally-hosted script
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*
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* @param string $url URL to JavaScript file.
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* @return string
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2006-06-27 10:35:02 +00:00
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* @deprecated As of 1.2, use JavascriptHelper::link()
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2006-11-10 18:31:27 +00:00
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* @see JavascriptHelper::link
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2005-12-27 03:33:44 +00:00
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*/
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2006-06-14 18:02:37 +00:00
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function linkOut($url) {
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2006-12-22 22:49:47 +00:00
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trigger_error(__('(JavascriptHelper::linkOut) Deprecated: Use JavascriptHelper::link instead'), E_USER_WARNING);
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2006-06-14 18:02:37 +00:00
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if (strpos($url, ".") === false) {
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$url .= ".js";
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}
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return sprintf($this->tags['javascriptlink'], $url);
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}
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2005-08-21 20:01:32 +00:00
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/**
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2006-02-18 23:42:21 +00:00
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* Escape carriage returns and single and double quotes for JavaScript segments.
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*
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* @param string $script string that might have javascript elements
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* @return string escaped string
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*/
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2006-06-14 18:02:37 +00:00
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function escapeScript($script) {
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$script = r(array("\r\n", "\n", "\r"), '\n', $script);
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$script = r(array('"', "'"), array('\"', "\\'"), $script);
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return $script;
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}
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2006-01-12 16:55:46 +00:00
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/**
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* Escape a string to be JavaScript friendly.
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*
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* List of escaped ellements:
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2006-05-26 05:29:17 +00:00
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* + "\r\n" => '\n'
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* + "\r" => '\n'
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* + "\n" => '\n'
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* + '"' => '\"'
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* + "'" => "\\'"
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2006-01-12 16:55:46 +00:00
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*
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* @param string $script String that needs to get escaped.
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* @return string Escaped string.
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*/
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2006-06-14 18:02:37 +00:00
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function escapeString($string) {
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$escape = array("\r\n" => '\n', "\r" => '\n', "\n" => '\n', '"' => '\"', "'" => "\\'");
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return r(array_keys($escape), array_values($escape), $string);
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}
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2005-08-21 20:01:32 +00:00
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/**
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2006-02-18 23:42:21 +00:00
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* Attach an event to an element. Used with the Prototype library.
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*
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* @param string $object Object to be observed
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* @param string $event event to observe
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* @param string $observer function to call
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* @param boolean $useCapture default true
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* @return boolean true on success
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*/
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2006-06-14 18:02:37 +00:00
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function event($object, $event, $observer = null, $useCapture = false) {
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if ($useCapture == true) {
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2006-06-27 10:35:02 +00:00
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$useCapture = 'true';
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2006-06-14 18:02:37 +00:00
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} else {
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2006-06-27 10:35:02 +00:00
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$useCapture = 'false';
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2006-06-14 18:02:37 +00:00
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}
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2006-06-27 10:35:02 +00:00
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if (strpos($object, 'window') !== false || strpos($object, 'document') !== false || strpos($object, '$(') !== false || strpos($object, '"') !== false || strpos($object, '\'') !== false) {
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$b = "Event.observe({$object}, '{$event}', function(event){ {$observer} }, {$useCapture});";
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} elseif (strpos($object, '\'') === 0) {
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$b = "Event.observe(" . substr($object, 1) . ", '{$event}', function(event){ {$observer} }, {$useCapture});";
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2006-06-14 18:02:37 +00:00
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} else {
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$chars = array('#', ' ', ', ', '.', ':');
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$found = false;
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foreach ($chars as $char) {
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if (strpos($object, $char) !== false) {
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$found = true;
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break;
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}
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}
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if ($found) {
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$this->_rules[$object] = $event;
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} else {
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2006-06-27 10:35:02 +00:00
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$b = "Event.observe(\$('{$object}'), '{$event}', function(event){ {$observer} }, {$useCapture});";
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2006-06-14 18:02:37 +00:00
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}
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}
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if (isset($b) && !empty($b)) {
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if ($this->_cacheEvents === true) {
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$this->_cachedEvents[] = $b;
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return;
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} else {
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2006-05-26 05:29:17 +00:00
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return $this->codeBlock($b);
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2006-06-14 18:02:37 +00:00
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}
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}
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}
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2005-10-03 04:48:00 +00:00
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/**
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2006-02-18 23:42:21 +00:00
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* Cache JavaScript events created with event()
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*
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2006-06-14 18:02:37 +00:00
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* @param boolean $file If true, code will be written to a file
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* @param boolean $all If true, all code written with JavascriptHelper will be sent to a file
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2006-02-18 23:42:21 +00:00
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* @return null
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*/
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2006-06-14 18:02:37 +00:00
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function cacheEvents($file = false, $all = false) {
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$this->_cacheEvents = true;
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$this->_cacheToFile = $file;
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$this->_cacheAll = $all;
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}
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2005-10-03 04:48:00 +00:00
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/**
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2007-02-21 22:13:16 +00:00
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* Gets (and clears) the current JavaScript event cache
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2006-02-18 23:42:21 +00:00
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*
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2007-02-21 22:13:16 +00:00
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* @param boolean $clear
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2006-06-14 18:02:37 +00:00
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* @return string
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2006-02-18 23:42:21 +00:00
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*/
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2007-02-21 22:13:16 +00:00
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function getCache($clear = true) {
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2007-01-27 17:41:32 +00:00
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$out = '';
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2006-06-14 18:02:37 +00:00
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$rules = array();
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2007-01-27 17:41:32 +00:00
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2006-06-14 18:02:37 +00:00
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if (!empty($this->_rules)) {
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foreach ($this->_rules as $sel => $event) {
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$rules[] = "\t'{$sel}': function(element, event) {\n\t\t{$event}\n\t}";
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}
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}
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2007-02-21 22:13:16 +00:00
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$data = implode("\n", $this->_cachedEvents);
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2006-06-14 18:02:37 +00:00
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2007-02-21 22:13:16 +00:00
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if (!empty($rules)) {
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$data .= "\nvar Rules = {\n" . implode(",\n\n", $rules) . "\n}";
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$data .= "\nEventSelectors.start(Rules);\n";
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}
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if ($clear) {
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$this->_rules = array();
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2006-06-14 18:02:37 +00:00
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$this->_cacheEvents = false;
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$this->_cachedEvents = array();
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2007-02-21 22:13:16 +00:00
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}
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return $data;
|
|
|
|
|
}
|
|
|
|
|
/**
|
|
|
|
|
* Write cached JavaScript events
|
|
|
|
|
*
|
|
|
|
|
* @param boolean $inline If true, returns JavaScript event code. Otherwise it is added to the
|
|
|
|
|
* output of $scripts_for_layout in the layout.
|
|
|
|
|
* @return string
|
|
|
|
|
*/
|
|
|
|
|
function writeEvents($inline = true) {
|
|
|
|
|
$out = '';
|
|
|
|
|
$rules = array();
|
2006-06-14 18:02:37 +00:00
|
|
|
|
2007-02-21 22:13:16 +00:00
|
|
|
if ($this->_cacheEvents) {
|
|
|
|
|
$data = $this->getCache();
|
2006-06-14 18:02:37 +00:00
|
|
|
|
2007-02-21 22:13:16 +00:00
|
|
|
if (!empty($data)) {
|
2006-06-14 18:02:37 +00:00
|
|
|
if ($this->_cacheToFile) {
|
|
|
|
|
$filename = md5($data);
|
|
|
|
|
if (!file_exists(JS . $filename . '.js')) {
|
|
|
|
|
cache(r(WWW_ROOT, '', JS) . $filename . '.js', $data, '+999 days', 'public');
|
|
|
|
|
}
|
2007-01-27 17:41:32 +00:00
|
|
|
$out = $this->link($filename);
|
|
|
|
|
} else {
|
2007-02-21 22:13:16 +00:00
|
|
|
$out = $this->codeBlock("\n" . $data . "\n", false);
|
2007-01-27 17:41:32 +00:00
|
|
|
}
|
|
|
|
|
if ($inline) {
|
|
|
|
|
return $out;
|
2006-06-14 18:02:37 +00:00
|
|
|
} else {
|
2007-01-27 17:41:32 +00:00
|
|
|
$view =& ClassRegistry::getObject('view');
|
|
|
|
|
$view->addScript($out);
|
2006-06-14 18:02:37 +00:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
2005-08-21 20:01:32 +00:00
|
|
|
/**
|
2006-02-18 23:42:21 +00:00
|
|
|
* Includes the Prototype Javascript library (and anything else) inside a single script tag.
|
|
|
|
|
*
|
|
|
|
|
* Note: The recommended approach is to copy the contents of
|
|
|
|
|
* javascripts into your application's
|
|
|
|
|
* public/javascripts/ directory, and use @see javascriptIncludeTag() to
|
|
|
|
|
* create remote script links.
|
|
|
|
|
* @return string script with all javascript in/javascripts folder
|
|
|
|
|
*/
|
2006-06-14 18:02:37 +00:00
|
|
|
function includeScript($script = "") {
|
|
|
|
|
if ($script == "") {
|
|
|
|
|
$files = scandir(JS);
|
|
|
|
|
$javascript = '';
|
|
|
|
|
|
|
|
|
|
foreach($files as $file) {
|
|
|
|
|
if (substr($file, -3) == '.js') {
|
|
|
|
|
$javascript .= file_get_contents(JS . "{$file}") . "\n\n";
|
2006-05-26 05:29:17 +00:00
|
|
|
}
|
2006-06-14 18:02:37 +00:00
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
$javascript = file_get_contents(JS . "$script.js") . "\n\n";
|
|
|
|
|
}
|
|
|
|
|
return $this->codeBlock("\n\n" . $javascript);
|
|
|
|
|
}
|
2006-02-09 05:23:26 +00:00
|
|
|
/**
|
2006-02-18 23:42:21 +00:00
|
|
|
* Generates a JavaScript object in JavaScript Object Notation (JSON)
|
|
|
|
|
* from an array
|
|
|
|
|
*
|
|
|
|
|
* @param array $data Data to be converted
|
|
|
|
|
* @param boolean $block Wraps return value in a <script/> block if true
|
|
|
|
|
* @param string $prefix Prepends the string to the returned data
|
|
|
|
|
* @param string $postfix Appends the string to the returned data
|
|
|
|
|
* @param array $stringKeys A list of array keys to be treated as a string
|
|
|
|
|
* @param boolean $quoteKeys If false, treats $stringKey as a list of keys *not* to be quoted
|
|
|
|
|
* @param string $q The type of quote to use
|
|
|
|
|
* @return string A JSON code block
|
|
|
|
|
*/
|
2006-06-14 18:02:37 +00:00
|
|
|
function object($data = array(), $block = false, $prefix = '', $postfix = '', $stringKeys = array(), $quoteKeys = true, $q = "\"") {
|
|
|
|
|
if (is_object($data)) {
|
|
|
|
|
$data = get_object_vars($data);
|
|
|
|
|
}
|
2006-05-26 05:29:17 +00:00
|
|
|
|
2006-06-14 18:02:37 +00:00
|
|
|
$out = array();
|
|
|
|
|
$key = array();
|
2005-08-21 06:49:02 +00:00
|
|
|
|
2006-06-14 18:02:37 +00:00
|
|
|
if (is_array($data)) {
|
|
|
|
|
$keys = array_keys($data);
|
|
|
|
|
}
|
2006-05-26 05:29:17 +00:00
|
|
|
|
2006-06-14 18:02:37 +00:00
|
|
|
$numeric = true;
|
2006-05-26 05:29:17 +00:00
|
|
|
|
2006-06-14 18:02:37 +00:00
|
|
|
if (!empty($keys)) {
|
|
|
|
|
foreach($keys as $key) {
|
|
|
|
|
if (!is_numeric($key)) {
|
|
|
|
|
$numeric = false;
|
|
|
|
|
break;
|
2006-05-26 05:29:17 +00:00
|
|
|
}
|
2006-06-14 18:02:37 +00:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
foreach($data as $key => $val) {
|
|
|
|
|
if (is_array($val) || is_object($val)) {
|
|
|
|
|
$val = $this->object($val, false, '', '', $stringKeys, $quoteKeys, $q);
|
|
|
|
|
} else {
|
2007-01-31 21:17:07 +00:00
|
|
|
if ((!count($stringKeys) && !is_numeric($val) && !is_bool($val)) || ($quoteKeys && in_array($key, $stringKeys, true)) || (!$quoteKeys && !in_array($key, $stringKeys, true))) {
|
2006-06-27 10:35:02 +00:00
|
|
|
$val = $q . $this->escapeString($val) . $q;
|
2006-05-26 05:29:17 +00:00
|
|
|
}
|
2006-08-28 15:40:19 +00:00
|
|
|
if ($val == null) {
|
2006-06-14 18:02:37 +00:00
|
|
|
$val = 'null';
|
2006-05-26 05:29:17 +00:00
|
|
|
}
|
2006-06-14 18:02:37 +00:00
|
|
|
}
|
2006-05-26 05:29:17 +00:00
|
|
|
|
2006-06-14 18:02:37 +00:00
|
|
|
if (!$numeric) {
|
2006-08-28 15:40:19 +00:00
|
|
|
$val = $q . $key . $q . ':' . $val;
|
2006-06-14 18:02:37 +00:00
|
|
|
}
|
2006-05-26 05:29:17 +00:00
|
|
|
|
2006-06-14 18:02:37 +00:00
|
|
|
$out[] = $val;
|
|
|
|
|
}
|
2006-05-26 05:29:17 +00:00
|
|
|
|
2006-06-14 18:02:37 +00:00
|
|
|
if (!$numeric) {
|
|
|
|
|
$rt = '{' . join(', ', $out) . '}';
|
|
|
|
|
} else {
|
|
|
|
|
$rt = '[' . join(', ', $out) . ']';
|
|
|
|
|
}
|
|
|
|
|
$rt = $prefix . $rt . $postfix;
|
2006-05-26 05:29:17 +00:00
|
|
|
|
2006-06-14 18:02:37 +00:00
|
|
|
if ($block) {
|
|
|
|
|
$rt = $this->codeBlock($rt);
|
|
|
|
|
}
|
2006-05-26 05:29:17 +00:00
|
|
|
|
2006-06-14 18:02:37 +00:00
|
|
|
return $rt;
|
|
|
|
|
}
|
|
|
|
|
/**
|
|
|
|
|
* AfterRender callback. Writes any cached events to the view, or to a temp file.
|
|
|
|
|
*
|
|
|
|
|
* @return null
|
|
|
|
|
*/
|
|
|
|
|
function afterRender() {
|
2007-02-21 22:13:16 +00:00
|
|
|
if (!$this->enabled) {
|
|
|
|
|
return;
|
|
|
|
|
}
|
2007-01-27 17:41:32 +00:00
|
|
|
echo $this->writeEvents(true);
|
2006-06-14 18:02:37 +00:00
|
|
|
}
|
2006-05-26 05:29:17 +00:00
|
|
|
}
|
2006-06-14 18:02:37 +00:00
|
|
|
|
2005-08-21 06:49:02 +00:00
|
|
|
?>
|
