📄 javascript.php
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<?php/* SVN FILE: $Id: javascript.php 7118 2008-06-04 20:49:29Z gwoo $ *//** * Javascript Helper class file. * * PHP versions 4 and 5 * * CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/> * Copyright 2005-2008, Cake Software Foundation, Inc. * 1785 E. Sahara Avenue, Suite 490-204 * Las Vegas, Nevada 89104 * * Licensed under The MIT License * Redistributions of files must retain the above copyright notice. * * @filesource * @copyright Copyright 2005-2008, Cake Software Foundation, Inc. * @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project * @package cake * @subpackage cake.cake.libs.view.helpers * @since CakePHP(tm) v 0.10.0.1076 * @version $Revision: 7118 $ * @modifiedby $LastChangedBy: gwoo $ * @lastmodified $Date: 2008-06-04 13:49:29 -0700 (Wed, 04 Jun 2008) $ * @license http://www.opensource.org/licenses/mit-license.php The MIT License *//** * Javascript Helper class for easy use of JavaScript. * * JavascriptHelper encloses all methods needed while working with JavaScript. * * @package cake * @subpackage cake.cake.libs.view.helpers */class JavascriptHelper extends AppHelper {/** * Determines whether native JSON extension is used for encoding. Set by object constructor. * * @var boolean * @access public */ var $useNative = false;/** * If true, automatically writes events to the end of a script or to an external JavaScript file * at the end of page execution * * @var boolean * @access public */ var $enabled = true;/** * Indicates whether <script /> 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( 'javascriptblock' => '<script type="text/javascript">%s</script>', 'javascriptstart' => '<script type="text/javascript">', 'javascriptlink' => '<script type="text/javascript" src="%s"></script>', 'javascriptend' => '</script>' );/** * 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 <head />, 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. * * @param string $script The JavaScript to be wrapped in SCRIPT tags. * @param array $options Set of options: allowCache, safe * @param boolean $safe DEPRECATED. Use $options['safe'] instead * @return string The full SCRIPT element, with the JavaScript inside it. */ function codeBlock($script = null, $options = array(), $safe = true) { if (!empty($options) && !is_array($options)) { $options = array('allowCache' => $options); } else if (empty($options)) { $options = array(); } $defaultOptions = array('allowCache' => true, 'safe' => true, 'inline' => true); $options = array_merge($defaultOptions, compact('safe'), $options); if ($this->_cacheEvents && $this->_cacheAll && $options['allowCache'] && $script !== null) { $this->_cachedEvents[] = $script; } else { $block = ($script !== null); $safe = ($options['safe'] || $this->safe); if ($safe && !($this->_cacheAll && $options['allowCache'])) { $script = "\n" . '//<![CDATA[' . "\n" . $script; if ($block) { $script .= "\n" . '//]]>' . "\n"; } } if ($script === null) { $this->__scriptBuffer = @ob_get_contents(); $this->_blockOptions = $options; $this->inBlock = true; @ob_end_clean(); ob_start(); return null; } else if (!$block) { $this->_blockOptions = $options; } if ($options['inline']) { if ($block) { return sprintf($this->tags['javascriptblock'], $script); } else { return sprintf($this->tags['javascriptstart']).ife($safe, "\n" . '//<![CDATA[' . "\n", ''); } } elseif ($block) { $view =& ClassRegistry::getObject('view'); $view->addScript(sprintf($this->tags['javascriptblock'], $script)); } } }/** * Ends a block of cached JavaScript code * * @return mixed */ function blockEnd() { $script = @ob_get_contents(); @ob_end_clean(); ob_start(); echo $this->__scriptBuffer; $this->__scriptBuffer = null; $options = $this->_blockOptions; $safe = ($options['safe'] || $this->safe); $this->_blockOptions = array(); $this->inBlock = false; if (isset($options['inline']) && !$options['inline']) { $view =& ClassRegistry::getObject('view'); $view->addScript(sprintf($this->tags['javascriptblock'], $script)); } if (!empty($script) && $this->_cacheAll && $options['allowCache']) { $this->_cachedEvents[] = $script; return null; } return ife($safe, "\n" . '//]]>' . "\n", '').$this->tags['javascriptend']; }/** * 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 <script /> tag will be printed inline, * otherwise it will be printed in the <head />, using $scripts_for_layout * @see JS_URL * @return string */ function link($url, $inline = true) { if (is_array($url)) { $out = ''; foreach ($url as $i) { $out .= "\n\t" . $this->link($i, $inline); } if ($inline) { return $out . "\n"; } return; } if (strpos($url, '://') === false) { if ($url{0} !== '/') { $url = JS_URL . $url; } if (strpos($url, '?') === false) { if (strpos($url, '.js') === false) { $url .= '.js'; } if ((Configure::read('Asset.timestamp') === true && Configure::read() > 0) || Configure::read('Asset.timestamp') === 'force') { $url .= '?' . @filemtime(WWW_ROOT . str_replace('/', DS, $url)); } } $url = $this->webroot($url); if (Configure::read('Asset.filter.js')) { $url = str_replace(JS_URL, 'cjs/', $url); } } $out = $this->output(sprintf($this->tags['javascriptlink'], $url)); if ($inline) { return $out; } else { $view =& ClassRegistry::getObject('view'); $view->addScript($out); } }/** * Escape carriage returns and single and double quotes for JavaScript segments. * * @param string $script string that might have javascript elements * @return string escaped string */ function escapeScript($script) {⌨️ 快捷键说明
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