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<?php
/**
* @package Joomla.Libraries
* @subpackage HTML
*
* @copyright Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* Utility class for Bootstrap elements.
*
* @package Joomla.Libraries
* @subpackage HTML
* @since 3.0
*/
class JevTypeahead
{
/**
* @var array Array containing information for loaded files
* @since 3.0
*/
protected static $loaded = array();
/**
* Method to load the Bootstrap JavaScript framework into the document head
*
* If debugging mode is on an uncompressed version of Bootstrap is included for easier debugging.
*
* @param mixed $debug Is debugging mode on? [optional]
*
* @return void
*
* @since 3.0
*/
public static function framework($debug = null)
{
// Only load once
if (!empty(static::$loaded[__METHOD__]))
{
return;
}
// Load jQuery
JHtml::_('jquery.framework');
JHtml::stylesheet('com_jevents/lib_jevtypeahead/jevtypeahead.css',array(),true);
JHtml::script('com_jevents/lib_jevtypeahead/typeahead.bundle.min.js',array("framework"=>false,"relative"=>true));
// If no debugging value is set, use the configuration setting
if ($debug === null)
{
$config = JFactory::getConfig();
$debug = (boolean) $config->get('debug');
}
static::$loaded[__METHOD__] = true;
return;
}
/**
* Add javascript support for Bootstrap typeahead
*
* @param string $selector The selector for the typeahead element.
* @param array $params An array of options for the typeahead element.
* Options for the tooltip can be:
* - prefetch string, the url to get initial data from.
* The function is passed two arguments, the query value in the input field and the
* process callback. The function may be used synchronously by returning the data
* source directly or asynchronously via the process callback's single argument.
* - field string the field value with the value of the typeahead.
* - remote string the url to get the data if prefetch is not enough.
*
* @return void
*
* @since 3.0
*/
public static function typeahead($selector = '.jevtypeahead', $params = array())
{
if (!isset(static::$loaded[__METHOD__][$selector]))
{
// NEEDS TO BE DIFFERENT FOR EACH SELECTOR TO SUPPORT MULTIPLE INSTANCES ON ONE PAGE!
// so we also need different javascript variable names
$jsname = "typeaheadData".md5($selector);
// Include Typeahead framework
static::framework();
// Setup options object
$opt['prefetch'] = isset($params['prefetch']) ? $params['prefetch'] : '';
$opt['remote'] = isset($params['remote']) ? $params['remote'] : '';
$opt['data_value'] = isset($params['data_value']) ? $params['data_value'] : 'value';
$opt['menu'] = isset($params['menu']) ? $params['menu'] : 'tt-menu';
$opt['data_id'] = isset($params['data_id']) ? $params['data_id'] : 'id';
$opt['field_selector'] = isset($params['field_selector']) ? $params['field_selector'] : '';
$opt['highlight'] = isset($params['highlight']) ? $params['highlight'] : 'true';
$opt['minLength'] = isset($params['minLength']) ? (int) $params['minLength'] : '3';
$opt['limit'] = isset($params['limit']) ? (int) $params['limit'] : '10';
$opt['scrollable'] = isset($params['scrollable']) ? (int) $params['scrollable'] : '0';
$opt['emptyCallback'] = isset($params['emptyCallback']) ? $params['emptyCallback'] : '';
// Call back method which receives the matched data
$opt['callback'] = isset($params['callback']) ? $params['callback'] : '';
$opt['json'] = isset($params['json']) ? $params['json'] : '';
if ($opt['scrollable']){
JFactory::getDocument()->addStyleDeclaration( ".scrollable-dropdown-menu .tt-menu, .scrollable-dropdown-menu .tt-dropdown-menu, #scrollable-dropdown-menu .tt-menu, #scrollable-dropdown-menu .tt-dropdown-menu{max-height: 150px; overflow-y: auto; background-color: #fff;}");
}
$options = json_encode($opt);
if($opt['prefetch']||$opt['remote'])
{
$typeaheadLoad = "jQuery(document).ready(function() {
var $jsname = new Bloodhound({
datumTokenizer: Bloodhound.tokenizers.obj.whitespace('".$opt['data_value']."'),
//identify: function(obj) { return obj.id; },
queryTokenizer: Bloodhound.tokenizers.whitespace,
";
if($opt['prefetch'])
{
$typeaheadLoad .= "prefetch: {
url:'".$opt['prefetch']."&token=".JSession::getFormToken()."',
ttl:10000 // 10 seconds cache time - increase in production
},";
}
$callback = "";
if ($opt['emptyCallback']){
$callback = ', transform: function(response) {if(response.length==0){'.$opt['emptyCallback'].'}; return response;} ';
}
else if ($opt['callback']){
$callback = ', transform: function(response) {return '.$opt['callback'].'(response);} ';
}
$prepare = "";
if ($opt['json']){
$prepare = "
, prepare: function(query, settings) {
// replace wildcard with result of query - does not work for some reason :(
settings.url = settings.url.replace(settings.wildcard, encodeURIComponent(query));
settings.dataType = 'json';
settings.type = 'POST';
settings.data = {json:" .$opt['json']. ", typeahead:query, token:'".JSession::getFormToken()."'};
return settings;
},
";
}
if($opt['remote'])
{
$typeaheadLoad .= "remote: {
url: '".$opt['remote']."&token=".JSession::getFormToken()."&typeahead=PQRZYX',
wildcard: 'PQRZYX'
$callback
$prepare
},";
}
$typeaheadLoad .= "});\n";
// clear local cache!
// $typeaheadLoad .= "$jsname.clear();$jsname.clearPrefetchCache();";
$typeaheadLoad .= "jQuery(document).ready(function() {"
. "jQuery('".$selector."').typeahead
(
{
highlight: ".$opt['highlight'].",
minLength: ".$opt['minLength'].",
classNames : { menu: '" . $opt['menu'] . "'},
},
{
name: '$jsname',
display: '".$opt['data_value']."',
limit: ".$opt['limit'].",
source: $jsname
}
);
})\n";
if($opt['field_selector'])
{
$typeaheadLoad .= "jQuery('".$selector."').on
(
'typeahead:select',
function(ev,data)
{
jQuery('".$opt['field_selector']."').val(data.".$opt['data_id'].");
}
)\n";
}
$typeaheadLoad .= "});\n";
}
// Attach script to document
JFactory::getDocument()->addScriptDeclaration($typeaheadLoad);
// Set static array
static::$loaded[__METHOD__][$selector] = true;
}
return;
}
}