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<?php
/* SVN FILE: $Id$ */
/**
* Javascript Generator class file.
*
* PHP versions 4 and 5
*
* CakePHP : Rapid Development Framework (http://www.cakephp.org)
* Copyright 2006-2008, Cake Software Foundation, Inc.
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @filesource
* @copyright Copyright 2006-2008, Cake Software Foundation, Inc.
* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP Project
* @package cake
* @subpackage cake.cake.libs.view.helpers
* @since CakePHP v 1.2
* @version $Revision$
* @modifiedby $LastChangedBy$
* @lastmodified $Date$
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
**/
/**
* Javascript Generator helper class for easy use of JavaScript.
*
* JsHelper provides an abstract interface for authoring JavaScript with a
* given client-side library.
*
* @package cake
* @subpackage cake.cake.libs.view.helpers
**/
class JsHelper extends AppHelper {
/**
* Base URL
*
* @var string
**/
var $base = null;
/**
* Webroot path
*
* @var string
**/
var $webroot = null;
/**
* Theme name
*
* @var string
**/
var $themeWeb = null;
/**
* URL to current action.
*
* @var string
**/
var $here = null;
/**
* Parameter array.
*
* @var array
**/
var $params = array();
/**
* Current action.
*
* @var string
**/
var $action = null;
/**
* Plugin path
*
* @var string
**/
var $plugin = null;
/**
* POST data for models
*
* @var array
**/
var $data = null;
/**
* helpers
*
* @var array
**/
var $helpers = array('Html');
/**
* 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>'
);
/**
* Current Javascript Engine that is being used
*
* @var string
* @access private
**/
var $__engineName;
/**
* __objects
*
* @var array
**/
var $__objects = array();
/**
* output
*
* @var string
**/
var $output = false;
/**
* Constructor - determines engine helper
*
* @param array $settings Settings array contains name of engine helper.
* @access public
* @return void
**/
function __construct($settings = array()) {
$className = 'jquery';
if (is_array($settings) && isset($settings[0])) {
$className = $settings[0];
} elseif (is_string($settings)) {
$className = $settings;
}
$engineName = $className;
if (strpos($className, '.') !== false) {
list($plugin, $className) = explode('.', $className);
}
$this->__engineName = $className . 'Engine';
$engineClass = $engineName . 'Engine';
$this->helpers[] = $engineClass;
parent::__construct();
}
/**
* call__
*
* @param string $method Method to be called
* @param array $params Parameters for the method being called.
* @access public
* @return void
**/
function call__($method, $params) {
if (isset($this->{$this->__engineName}) && method_exists($this->{$this->__engineName}, $method)) {
return $this->{$this->__engineName}->dispatchMethod($method, $params);
}
if (method_exists($this, $method . '_')) {
return $this->dispatchMethod($method . '_', $params);
}
trigger_error(sprintf(__('JsHelper:: Missing Method %s is undefined', true), $method), E_USER_WARNING);
}
/**
* Writes all Javascript generated so far to a code block or
* caches them to a file and returns a linked script.
*
* Options
*
* - 'inline' - Set to true to have scripts output as a script block inline
* if 'cache' is also true, a script link tag will be generated. (default true)
* - 'cache' - Set to true to have scripts cached to a file and linked in (default true)
* - 'clear' - Set to false to prevent script cache from being cleared (default true)
* - 'onDomReady' - wrap cached scripts in domready event (default true)
* - 'safe' - if an inline block is generated should it be wrapped in <![CDATA[ ... ]]> (default true)
*
* @param array $options options for the code block
* @return string completed javascript tag.
**/
function writeScripts($options = array()) {
$defaults = array('onDomReady' => true, 'inline' => true, 'cache' => true, 'clear' => true, 'safe' => true);
$options = array_merge($defaults, $options);
$script = implode("\n", $this->{$this->__engineName}->getCache($options['clear']));
if ($options['onDomReady']) {
$script = $this->{$this->__engineName}->domReady($script);
}
if (!$options['cache'] && $options['inline']) {
return $this->Html->scriptBlock($script, $options);
}
if ($options['cache'] && $options['inline']) {
//cache to file and return script tag.
}
$view =& ClassRegistry::getObject('view');
$view->addScript($script);
return null;
}
/**
* Loads a remote URL
*
* @param string $url
* @param array $options
* @return string
**/
/* function load_($url = null, $options = array()) {
if (isset($options['update'])) {
if (!is_array($options['update'])) {
$func = "new Ajax.Updater('{$options['update']}',";
} else {
$func = "new Ajax.Updater(document.createElement('div'),";
}
if (!isset($options['requestHeaders'])) {
$options['requestHeaders'] = array();
}
if (is_array($options['update'])) {
$options['update'] = join(' ', $options['update']);
}
$options['requestHeaders']['X-Update'] = $options['update'];
} else {
$func = "new Ajax.Request(";
}
$func .= "'" . Router::url($url) . "'";
$ajax =& new AjaxHelper();
$func .= ", " . $ajax->__optionsForAjax($options) . ")";
if (isset($options['before'])) {
$func = "{$options['before']}; $func";
}
if (isset($options['after'])) {
$func = "$func; {$options['after']};";
}
if (isset($options['condition'])) {
$func = "if ({$options['condition']}) { $func; }";
}
if (isset($options['confirm'])) {
$func = "if (confirm('" . $this->Javascript->escapeString($options['confirm'])
. "')) { $func; } else { return false; }";
}
return $func;
}
/*
function get__($name) {
return $this->__object($name, 'id');
}
function select($pattern) {
return $this->__object($pattern, 'pattern');
}
function real($var) {
return $this->__object($var, 'real');
}
function __object($name, $var) {
if (!isset($this->__objects[$name])) {
$this->__objects[$name] = new JsHelperObject($this);
$this->__objects[$name]->{$var} = $name;
}
return $this->__objects[$name];
}
*/
}
/**
* JsEngineBaseClass
*
* Abstract Base Class for All JsEngines to extend. Provides generic methods.
*
* @package cake.view.helpers
**/
class JsBaseEngineHelper extends AppHelper {
/**
* Determines whether native JSON extension is used for encoding. Set by object constructor.
*
* @var boolean
* @access public
**/
var $useNative = false;
/**
* The js snippet for the current selection.
*
* @var string
* @access protected
**/
var $_selection;
/**
* Scripts that are queued for output
*
* @var array
**/
var $__cachedScripts = array();
/**
* Constructor.
*
* @return void
**/
function __construct() {
$this->useNative = function_exists('json_encode');
}
/**
* Create an alert message in Javascript
*
* @param string $message Message you want to alter.
* @access public
* @return void
**/
function alert($message) {
return 'alert("' . $this->escape($message) . '");';
}
/**
* Redirects to a URL
*
* @param mixed $url
* @param array $options
* @return string
**/
function redirect($url = null) {
return 'window.location = "' . Router::url($url) . '";';
}
/**
* Create a confirm() message
*
* @param string $message Message you want confirmed.
* @access public
* @return void
**/
function confirm($message) {
return 'confirm("' . $this->escape($message) . '");';
}
/**
* Create a prompt() Javascript function
*
* @param string $message Message you want to prompt.
* @param string $default Default message
* @access public
* @return void
**/
function prompt($message, $default = '') {
return 'prompt("' . $this->escape($message) . '", "' . $this->escape($default) . '");';
}
/**
* Generates a JavaScript object in JavaScript Object Notation (JSON)
* from an array. Will use native JSON encode method if available, and $useNative == true
*
* Options:
*
* - 'prefix' - String prepended to the returned data.
* - 'postfix' - String appended to the returned data.
* - 'stringKeys' - A list of array keys to be treated as a string
* - 'quoteKeys' - If false treats $options['stringKeys'] as a list of keys **not** to be quoted.
* - 'q' - Type of quote to use.
*
* @param array $data Data to be converted.
* @param array $options Set of options, see above.
* @return string A JSON code block
* @access public
**/
function object($data = array(), $options = array()) {
$defaultOptions = array(
'block' => false, 'prefix' => '', 'postfix' => '',
'stringKeys' => array(), 'quoteKeys' => true, 'q' => '"'
);
$options = array_merge($defaultOptions, $options);
if (is_object($data)) {
$data = get_object_vars($data);
}
$out = $keys = array();
$numeric = true;
if ($this->useNative) {
$rt = json_encode($data);
} else {
if (is_array($data)) {
$keys = array_keys($data);
}
if (!empty($keys)) {
$numeric = (array_values($keys) === array_keys(array_values($keys)));
}
foreach ($data as $key => $val) {
if (is_array($val) || is_object($val)) {
$val = $this->object($val, array_merge($options, array('block' => false)));
} else {
$quoteStrings = (
!count($options['stringKeys']) ||
($options['quoteKeys'] && in_array($key, $options['stringKeys'], true)) ||
(!$options['quoteKeys'] && !in_array($key, $options['stringKeys'], true))
);
$val = $this->value($val, $quoteStrings);
}
if (!$numeric) {
$val = $options['q'] . $this->value($key, false) . $options['q'] . ':' . $val;
}
$out[] = $val;
}
if (!$numeric) {
$rt = '{' . join(',', $out) . '}';
} else {
$rt = '[' . join(',', $out) . ']';
}
}
$rt = $options['prefix'] . $rt . $options['postfix'];
if ($options['block']) {
$rt = $this->codeBlock($rt, array_diff_key($options, $defaultOptions));
}
return $rt;
}
/**
* Converts a PHP-native variable of any type to a JSON-equivalent representation
*
* @param mixed $val A PHP variable to be converted to JSON
* @param boolean $quoteStrings If false, leaves string values unquoted
* @return string a JavaScript-safe/JSON representation of $val
* @access public
**/
function value($val, $quoteStrings = true) {
switch (true) {
case (is_array($val) || is_object($val)):
$val = $this->object($val);
break;
case ($val === null):
$val = 'null';
break;
case (is_bool($val)):
$val = ($val === true) ? 'true' : 'false';
break;
case (is_int($val)):
$val = $val;
break;
case (is_float($val)):
$val = sprintf("%.11f", $val);
break;
default:
$val = $this->escape($val);
if ($quoteStrings) {
$val = '"' . $val . '"';
}
break;
}
return $val;
}
/**
* Escape a string to be JavaScript friendly.
*
* List of escaped ellements:
* + "\r\n" => '\n'
* + "\r" => '\n'
* + "\n" => '\n'
* + '"' => '\"'
* + "'" => "\\'"
*
* @param string $script String that needs to get escaped.
* @return string Escaped string.
* @access public
**/
function escape($string) {
$escape = array("\r\n" => '\n', "\r" => '\n', "\n" => '\n', '"' => '\"', "'" => "\\'");
return str_replace(array_keys($escape), array_values($escape), $string);
}
/**
* Write a script to the cached scripts.
*
* @return void
**/
function writeCache($script) {
$this->__cachedScripts[] = $script;
}
/**
* Get all the cached scripts
*
* @param boolean $clear Whether or not to clear the script cache.s
* @return array Array of scripts added to the request.
**/
function getCache($clear = true) {
$scripts = $this->__cachedScripts;
if ($clear) {
$this->__cachedScripts = array();
}
return $scripts;
}
/**
* Create javascript selector for a CSS rule
*
* @param string $selector The selector that is targeted
* @param boolean $multiple Whether or not the selector could target more than one element.
* @return object instance of $this. Allows chained methods.
**/
function select($selector, $multiple = false) {
return $this;
}
/**
* Add an event to the script cache. Operates on the currently selected elements.
*
* @param string $type Type of event to bind to the current dom id
* @param string $callback The Javascript function you wish to trigger or the function literal
* @return string completed event handler
**/
function addEvent($type, $callback) {
}
/**
* Create a domReady event. This is a special event in many libraries
*
* @param string $functionBody The code to run on domReady
* @return string completed domReady method
**/
function domReady($functionBody) {
}
/**
* Create an iteration over the current selection result.
*
* @param string $method The method you want to apply to the selection
* @param string $callback The function body you wish to apply during the iteration.
* @return string completed iteration
**/
function each($method, $callback) {
}
/**
* Parse an options assoc array into an Javascript object literal.
* Similar to object() but treats any non-integer value as a string,
* does not include { }
*
* @param array $options Options to be converted
* @return string
* @access protected
**/
function _parseOptions($options) {
$out = array();
foreach ($options as $key => $value) {
if (!is_int($val)) {
$val = '"' . $val . '"';
}
$out[] = $key . ':' . $val;
}
return join(', ', $out);
}
}
class JsHelperObject {
var $__parent = null;
var $id = null;
var $pattern = null;
var $real = null;
function __construct(&$parent) {
if (is_object($parent)) {
$this->setParent($parent);
}
}
function toString() {
return $this->__toString();
}
function __toString() {
return $this->literal;
}
function ref($ref = null) {
if ($ref == null) {
foreach (array('id', 'pattern', 'real') as $ref) {
if ($this->{$ref} !== null) {
return $this->{$ref};
}
}
} else {
return ($this->{$ref} !== null);
}
return null;
}
function literal($append = null) {
if (!empty($this->id)) {
$data = '$("' . $this->id . '")';
}
if (!empty($this->pattern)) {
$data = '$$("' . $this->pattern . '")';
}
if (!empty($this->real)) {
$data = $this->real;
}
if (!empty($append)) {
$data .= '.' . $append;
}
return $data;
}
function __call($name, $args) {
$data = '';
if (isset($this->__parent->effectMap[strtolower($name)])) {
array_unshift($args, $this->__parent->effectMap[strtolower($name)]);
$name = 'effect';
}
switch ($name) {
case 'effect':
case 'visualEffect':
if (strpos($args[0], '_') || $args[0]{0} != strtoupper($args[0]{0})) {
$args[0] = Inflector::camelize($args[0]);
}
if (strtolower($args[0]) == 'highlight') {
$data .= 'new ';
}
if ($this->pattern == null) {
$data .= 'Effect.' . $args[0] . '(' . $this->literal();
} else {
$data .= 'Effect.' . $args[0] . '(item';
}
if (isset($args[1]) && is_array($args[1])) {
$data .= ', {' . $this->__options($args[1]) . '}';
}
$data .= ');';
if ($this->pattern !== null) {
$data = $this->each($data);
}
break;
case 'remove':
case 'toggle':
case 'show':
case 'hide':
if (empty($args)) {
$obj = 'Element';
$params = '';
} else {
$obj = 'Effect';
$params = ', "' . $args[0] . '"';
}
if ($this->pattern != null) {
$data = $this->each($obj . ".{$name}(item);");
} else {
$data = $obj . ".{$name}(" . $this->literal() . ');';
}
break;
case 'visible':
$data = $this->literal() . '.visible();';
break;
case 'update':
$data = $this->literal() . ".update({$args[0]});";
break;
case 'load':
$data = 'new Ajax.Updater("' . $this->id . '", "' . $args[0] . '"';
if (isset($args[1]) && is_array($args[1])) {
$data .= ', {' . $this->__options($args[1]) . '}';
}
$data .= ');';
break;
case 'each':
case 'all':
case 'any':
case 'detect':
case 'findAll':
if ($this->pattern != null) {
$data = $this->__iterate($name, $args[0]);
}
break;
case 'addClass':
case 'removeClass':
case 'hasClass':
case 'toggleClass':
$data = $this->literal() . ".{$name}Name(\"{$args[0]}\");";
break;
case 'clone':
case 'inspect':
case 'keys':
case 'values':
$data = "Object.{$name}(" . $this->literal() . ");";
break;
case 'extend':
$data = "Object.extend(" . $this->literal() . ", {$args[0]});";
break;
case '...':
// Handle other methods here
// including interfaces to load other files on-the-fly
// that add support for additional methods/replacing existing methods
break;
default:
$data = $this->literal() . '.' . $name . '();';
break;
}
if ($this->__parent->output) {
echo $data;
} else {
return $data;
}
}
function __iterate($method, $data) {
return '$$("' . $this->pattern . '").' . $method . '(function(item) {' . $data . '});';
}
function setParent(&$parent) {
$this->__parent =& $parent;
}
function __options($opts) {
$options = array();
foreach ($opts as $key => $val) {
if (!is_int($val)) {
$val = '"' . $val . '"';
}
$options[] = $key . ':' . $val;
}
return join(', ', $options);
}
}
?>
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