js.php

Go to the documentation of this file.

<?php
/* SVN FILE: $Id: js.php 7847 2008-11-08 02:54:07Z renan.saddam $ */
/**
 * 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: 7847 $
 * @modifiedby    $LastChangedBy: renan.saddam $
 * @lastmodified  $Date: 2008-11-07 21:54:07 -0500 (Fri, 07 Nov 2008) $
 * @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 Overloadable2 {
    var $base = null;
    var $webroot = null;
    var $here = null;
    var $params = null;
    var $action = null;
    var $data = null;
    var $themeWeb = null;
    var $plugin = null;

    var $helpers = array();

    var $hook = null;

    var $__objects = array();

    var $effectMap = array(
        'Appear', 'Fade', 'Puff', 'BlindDown', 'BlindUp', 'SwitchOff', 'SlideDown', 'SlideUp',
        'DropOut', 'Shake', 'Pulsate', 'Squish', 'Fold', 'Grow', 'Shrink', 'Highlight', 'toggle'
    );

    var $output = false;

    function __construct() {
        $this->effectMap = array_combine(
            array_map('strtolower', $this->effectMap),
            $this->effectMap
        );
        parent::__construct();
    }

    function call__($method, $params) {
        if (is_object($this->hook) && method_exists($this->hook, $method)) {
            $this->hook->dispatchMethod($method . '_', $params);
        }
        if (method_exists($this, $method . '_')) {
            return $this->dispatchMethod($method . '_', $params);
        }
    }

    function alert_($message) {
        return 'alert("' . $this->escape($message) . '");';
    }

    function if_($if, $then, $else = null, $elseIf = array()) {
        $len = strlen($if) - 1;
        if ($if{$len} == ';') {
            $if{$len} = null;
        }

        $out = 'if (' . $if . ') { ' . $then . ' }';

        foreach ($elseIf as $cond => $exec) {
            //$out .=
        }

        if (!empty($else)) {
            $out .= ' else { ' . $else . ' }';
        }

        return $out;
    }

    function confirm_($message) {
        return 'confirm("' . $this->escape($message) . '");';
    }

    function prompt_($message, $default = '') {
        return 'prompt("' . $this->escape($message) . '", "' . $this->escape($default) . '");';
    }
/*
 * Tries a series of expressions, and executes after first successful completion.
 * (See Prototype's Try.these).
 *
 * @return string
 */
    function tryThese_($expr1, $expr2, $expr3) {
    }
/**
 * 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;
    }
/**
 * Redirects to a URL
 *
 * @param  mixed $url
 * @param  array  $options
 * @return string
 */
    function redirect_($url = null) {
        return 'window.location = "' . Router::url($url) . '";';
    }
/**
 * Escape a string to be JavaScript friendly.
 *
 * List of escaped ellements:
 *  + "\r\n" => '\n'
 *  + "\r" => '\n'
 *  + "\n" => '\n'
 *  + '"' => '\"'
 *  + "'" => "\\'"
 *
 * @param  string $script String that needs to get escaped.
 * @return string Escaped string.
 */
    function escape($string) {
        $escape = array("\r\n" => '\n', "\r" => '\n', "\n" => '\n', '"' => '\"', "'" => "\\'");
        return str_replace(array_keys($escape), array_values($escape), $string);
    }

    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];
    }
/**
 * 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 $q The type of quote to use
 * @return string A JSON code block
 */
    function object($data = array(), $block = false, $prefix = '', $postfix = '', $stringKeys = array(), $quoteKeys = true, $q = "\"") {
        if (is_object($data)) {
            $data = get_object_vars($data);
        }

        $out = array();
        $key = array();

        if (is_array($data)) {
            $keys = array_keys($data);
        }

        $numeric = true;

        if (!empty($keys)) {
            foreach ($keys as $key) {
                if (!is_numeric($key)) {
                    $numeric = false;
                    break;
                }
            }
        }

        foreach ($data as $key => $val) {
            if (is_array($val) || is_object($val)) {
                $val = $this->object($val, false, '', '', $stringKeys, $quoteKeys, $q);
            } else {
                if ((!count($stringKeys) && !is_numeric($val) && !is_bool($val)) || ($quoteKeys && in_array($key, $stringKeys)) || (!$quoteKeys && !in_array($key, $stringKeys)) && $val !== null) {
                    $val = $q . $this->escapeString($val) . $q;
                }
                if ($val == null) {
                    $val = 'null';
                }
            }

            if (!$numeric) {
                $val = $q . $key . $q . ':' . $val;
            }

            $out[] = $val;
        }

        if (!$numeric) {
            $rt = '{' . join(', ', $out) . '}';
        } else {
            $rt = '[' . join(', ', $out) . ']';
        }
        $rt = $prefix . $rt . $postfix;

        if ($block) {
            $rt = $this->codeBlock($rt);
        }

        return $rt;
    }
}

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);
    }
}
?>

---