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<?php
/**
* HTML/JavaScript Generation Helper
*
* @category HTML
* @package AJAX
* @author Joshua Eichorn <josh@bluga.net>
* @copyright 2005 Joshua Eichorn
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @version Release: 0.5.0
*/
/**
* HTML/JavaScript Generation Helper
*
* @category HTML
* @package AJAX
* @author Joshua Eichorn <josh@bluga.net>
* @copyright 2005 Joshua Eichorn
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @version Release: 0.5.0
* @link http://pear.php.net/package/HTML_AJAX
*/
class HTML_AJAX_Helper
{
/**
* URL where an HTML_AJAX_Server instance is serving up clients and taking ajax requests
*/
var $serverUrl = 'server.php';
/**
* JS libraries to include
*
* @var array
*/
var $jsLibraries = array('Util','Main','Request','HttpClient','Dispatcher','Behavior','Loading','JSON','iframe');
/**
* Remote class stubs to include
*/
var $stubs = array();
/**
* Include all needed libraries, stubs, and set defaultServer
*
* @return string
*/
function setupAJAX()
{
$libs = array(0=>array());
foreach($this->jsLibraries as $library) {
if (is_array($library)) {
$libs[] = implode(',',$library);
}
else {
$libs[0][] = $library;
}
}
$libs[0] = implode(',',$libs[0]);
$ret = '';
foreach($libs as $list) {
$ret .= "<script type='text/javascript' src='{$this->serverUrl}?client={$list}'></script>\n";
}
if (count($this->stubs) > 0) {
$stubs = implode(',',$this->stubs);
$ret .= "<script type='text/javascript' src='{$this->serverUrl}?stub={$stubs}'></script>\n";
}
$ret .= $this->encloseInScript('HTML_AJAX.defaultServerUrl = '.$this->escape($this->serverUrl));
return $ret;
}
/**
* Create a custom Loading message
*
* @param string $body HTML body of the loading div
* @param string $class CSS class of the div
* @param string $style style tag of the loading div
*/
function loadingMessage($body, $class = 'HTML_AJAX_Loading',
$style = 'position: absolute; top: 0; right: 0; background-color: red; width: 80px; padding: 4px; display: none')
{
return "<div id='HTML_AJAX_LOADING' class='{$class}' style=\"{$style}\">{$body}</div>\n";
}
/**
* Update the contents of an element using ajax
*
* @param string $id id of the element to update
* @param string|array $update Either a url to update with or a array like array('class','method')
* @param string $type replace or append
* @param boolean $enclose
*/
function updateElement($id, $update, $type, $enclose = false) {
if (is_array($update)) {
$updateStr = "";
$comma = '';
foreach($update as $item) {
$updateStr .= $comma.$this->escape($item);
$comma = ',';
}
}
else {
$updateStr = $this->escape($update);
}
$ret = "HTML_AJAX.{$type}(".$this->escape($id).",{$updateStr});\n";
if ($enclose) {
$ret = $this->encloseInScript($ret);
}
return $ret;
}
/**
* Escape a string and add quotes allowing it to be a javascript paramater
*
* @param string $input
* @return string
* @todo do something here besides a quick hack
*/
function escape($input) {
return "'".addslashes($input)."'";
}
/**
* Enclose a string in a script block
*
* @param string $input
* @return string
*/
function encloseInScript($input) {
return '<script type="text/javascript">'.$input."</script>\n";
}
/**
* Generate a JSON String
*
* @param string $input
* @return string
*/
function jsonEncode($input) {
require_once 'HTML/AJAX/Serializer/JSON.php';
$s = new HTML_AJAX_Serializer_JSON();
return $s->serialize($input);
}
}
?>
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