mirror of
https://github.com/kamilwylegala/cakephp2-php8.git
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8917efcc0a
git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@4615 3807eeeb-6ff5-0310-8944-8be069107fe0
414 lines
No EOL
11 KiB
PHP
414 lines
No EOL
11 KiB
PHP
<?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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* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
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* Copyright 2005-2007, Cake Software Foundation, Inc.
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* 1785 E. Sahara Avenue, Suite 490-204
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* Las Vegas, Nevada 89104
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*
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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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*
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* @filesource
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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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* @package cake
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* @subpackage cake.cake.libs.view.helpers
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* @since CakePHP(tm) v 0.10.0.1076
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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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*/
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/**
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* Javascript Helper class for easy use of JavaScript.
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*
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* JavascriptHelper encloses all methods needed while working with JavaScript.
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*
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* @package cake
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* @subpackage cake.cake.libs.view.helpers
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*/
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class JavascriptHelper extends AppHelper {
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var $__scriptBuffer = null;
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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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var $enabled = true;
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var $safe = false;
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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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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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/**
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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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* @param boolean $allowCache Allows the script to be cached if non-event caching is active
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* @param boolean $safe Wraps the script in an HTML comment and a CDATA block
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* @return string The full SCRIPT element, with the JavaScript inside it.
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*/
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function codeBlock($script = null, $allowCache = true, $safe = false) {
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if ($this->_cacheEvents && $this->_cacheAll && $allowCache && $script !== null) {
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$this->_cachedEvents[] = $script;
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} else {
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$block = ($script !== null);
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if (($safe || $this->safe) && !($this->_cacheAll && $allowCache)) {
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$script = "\n" . '<!--//--><![CDATA[//><!--' . "\n" . $script;
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if ($block) {
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$script .= "\n" . '//--><!]]>' . "\n";
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}
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}
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if ($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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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'], $script);
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}
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}
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}
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/**
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* Ends a block of cached JavaScript code
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*
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* @return mixed
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*/
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function blockEnd() {
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$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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return $this->tags['javascriptend'];
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}
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/**
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* Returns a JavaScript include tag (SCRIPT element)
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*
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* @param mixed $url String URL to JavaScript file, or an array of URLs.
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* @param boolean $inline If true, the <script /> tag will be printed inline,
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* otherwise it will be printed in the <head />
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* @return string
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*/
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function link($url, $inline = true) {
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if (is_array($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 $out . "\n";
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}
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return;
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}
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if (strpos($url, '.js') === false && strpos($url, '?') === false) {
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$url .= '.js';
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}
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if (strpos($url, '://') === false) {
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$url = $this->webroot(JS_URL . $url);
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}
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$out = $this->output(sprintf($this->tags['javascriptlink'], $url));
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if ($inline) {
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return $out;
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} else {
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$view =& ClassRegistry::getObject('view');
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$view->addScript($out);
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}
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}
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/**
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* Returns a JavaScript include tag for an externally-hosted script
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*
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* @param string $url URL to JavaScript file.
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* @return string
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* @deprecated As of 1.2, use JavascriptHelper::link()
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* @see JavascriptHelper::link
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*/
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function linkOut($url) {
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trigger_error(__('(JavascriptHelper::linkOut) Deprecated: Use JavascriptHelper::link instead'), E_USER_WARNING);
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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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/**
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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 $script string that might have javascript elements
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* @return string escaped string
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*/
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function escapeScript($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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/**
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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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* + "\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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*
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* @param string $script String that needs to get escaped.
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* @return string Escaped string.
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*/
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function escapeString($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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/**
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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 $useCapture default true
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* @return boolean true on success
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*/
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function event($object, $event, $observer = null, $useCapture = false) {
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if ($useCapture == true) {
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$useCapture = 'true';
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} else {
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$useCapture = 'false';
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}
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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} }, {$useCapture});";
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} else {
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$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] = $event;
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} else {
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$b = "Event.observe(\$('{$object}'), '{$event}', function(event){ {$observer} }, {$useCapture});";
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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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return $this->codeBlock($b);
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}
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}
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}
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/**
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* Cache JavaScript events created with event()
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*
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* @param boolean $file If true, code will be written to a file
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* @param boolean $all If true, all code written with JavascriptHelper will be sent to a file
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* @return null
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*/
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function cacheEvents($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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/**
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* Gets (and clears) the current JavaScript event cache
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*
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* @param boolean $clear
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* @return string
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*/
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function getCache($clear = true) {
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$out = '';
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$rules = array();
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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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$data = implode("\n", $this->_cachedEvents);
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if (!empty($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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$this->_cacheEvents = false;
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$this->_cachedEvents = array();
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}
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return $data;
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}
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/**
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* Write cached JavaScript events
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*
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* @param boolean $inline If true, returns JavaScript event code. Otherwise it is added to the
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* output of $scripts_for_layout in the layout.
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* @return string
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*/
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function writeEvents($inline = true) {
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$out = '';
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$rules = array();
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if ($this->_cacheEvents) {
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$data = $this->getCache();
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if (!empty($data)) {
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if ($this->_cacheToFile) {
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$filename = md5($data);
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if (!file_exists(JS . $filename . '.js')) {
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cache(r(WWW_ROOT, '', JS) . $filename . '.js', $data, '+999 days', 'public');
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}
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$out = $this->link($filename);
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} else {
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$out = $this->codeBlock("\n" . $data . "\n", false);
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}
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if ($inline) {
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return $out;
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} else {
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$view =& ClassRegistry::getObject('view');
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$view->addScript($out);
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}
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}
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}
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}
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/**
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* Includes the Prototype Javascript library (and anything else) inside a single script tag.
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*
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* Note: The recommended approach is to copy the contents of
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* javascripts into your application's
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* public/javascripts/ directory, and use @see javascriptIncludeTag() to
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* create remote script links.
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* @return string script with all javascript in/javascripts folder
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*/
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function includeScript($script = "") {
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if ($script == "") {
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$files = scandir(JS);
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$javascript = '';
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foreach($files as $file) {
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if (substr($file, -3) == '.js') {
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$javascript .= file_get_contents(JS . "{$file}") . "\n\n";
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}
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}
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} else {
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$javascript = file_get_contents(JS . "$script.js") . "\n\n";
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}
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return $this->codeBlock("\n\n" . $javascript);
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}
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/**
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* Generates a JavaScript object in JavaScript Object Notation (JSON)
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* from an array
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*
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* @param array $data Data to be converted
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* @param boolean $block Wraps return value in a <script/> block if true
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* @param string $prefix Prepends the string to the returned data
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* @param string $postfix Appends the string to the returned data
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* @param array $stringKeys A list of array keys to be treated as a string
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* @param boolean $quoteKeys If false, treats $stringKey as a list of keys *not* to be quoted
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* @param string $q The type of quote to use
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* @return string A JSON code block
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*/
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function object($data = array(), $block = false, $prefix = '', $postfix = '', $stringKeys = array(), $quoteKeys = true, $q = "\"") {
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if (is_object($data)) {
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$data = get_object_vars($data);
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}
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$out = array();
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$key = array();
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if (is_array($data)) {
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$keys = array_keys($data);
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}
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$numeric = true;
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if (!empty($keys)) {
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foreach($keys as $key) {
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if (!is_numeric($key)) {
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$numeric = false;
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break;
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}
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}
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}
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foreach($data as $key => $val) {
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if (is_array($val) || is_object($val)) {
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$val = $this->object($val, false, '', '', $stringKeys, $quoteKeys, $q);
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} else {
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if ((!count($stringKeys) && !is_numeric($val) && !is_bool($val)) || ($quoteKeys && in_array($key, $stringKeys, true)) || (!$quoteKeys && !in_array($key, $stringKeys, true))) {
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$val = $q . $this->escapeString($val) . $q;
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}
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if ($val == null) {
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$val = 'null';
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}
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}
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if (!$numeric) {
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$val = $q . $key . $q . ':' . $val;
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}
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$out[] = $val;
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}
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if (!$numeric) {
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$rt = '{' . join(', ', $out) . '}';
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} else {
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$rt = '[' . join(', ', $out) . ']';
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}
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$rt = $prefix . $rt . $postfix;
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if ($block) {
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$rt = $this->codeBlock($rt);
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}
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return $rt;
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}
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/**
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* AfterRender callback. Writes any cached events to the view, or to a temp file.
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*
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* @return null
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*/
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function afterRender() {
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if (!$this->enabled) {
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return;
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}
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echo $this->writeEvents(true);
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}
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}
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?>
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