TbTypeahead.php

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<?php
Yii::import('booster.widgets.TbBaseInputWidget');

class TbTypeahead extends TbBaseInputWidget {
        
        public $options = array();
        
        public $datasets = array();

        public function init() {
                
                if(!isset($this->datasets['source']))
                        $this->datasets['source'] = array();
                
                // @todo: which one is more correct? 
                // if(!isset($this->datasets['source']) || empty($this->datasets['source']))
                        // throw new CException('you must provide datasets["source"] option');
                
                if(empty($this->options))
                        $this->options['minLength'] = 1;
                $this->registerClientScript();
                
                if(!isset($this->htmlOptions['class']) || empty($this->htmlOptions['class']))
                        $this->htmlOptions['class'] = 'typeahead';
                else
                        $this->htmlOptions['class'] .= ' typeahead';
                
                parent::init();
        }

        public function run() {
                // print_r($this->htmlOptions); //typeahead
                list($name, $id) = $this->resolveNameID();

                if (isset($this->htmlOptions['id'])) {
                        $id = $this->htmlOptions['id'];
                } else {
                        $this->htmlOptions['id'] = $id;
                }

                if (isset($this->htmlOptions['name'])) {
                        $name = $this->htmlOptions['name'];
                }

                if ($this->hasModel()) {
                        echo CHtml::activeTextField($this->model, $this->attribute, $this->htmlOptions);
                } else {
                        echo CHtml::textField($name, $this->value, $this->htmlOptions);
                }

                $this->datasets['source'] = 'js:substringMatcher(_'.$this->id.'_source_list)';
                
                $options = CJavaScript::encode($this->options);
                $datasets = CJavaScript::encode($this->datasets);
                
                Yii::app()->clientScript->registerScript(__CLASS__ . '#' . $id, "jQuery('#{$id}').typeahead({$options}, {$datasets});");
                
        }

        function registerClientScript() {
        
                $booster = Booster::getBooster();
                $booster->registerPackage('typeahead');
                
                if(empty($this->datasets) || !isset($this->datasets['source']) || !is_array($this->datasets['source']))
                        return;
                
                Yii::app()->clientScript->registerScript(__CLASS__ . '#substringMatcher', '
                        var substringMatcher = function(strs) {
                                return function findMatches(q, cb) {
                                        var matches, substringRegex;
                                         
                                        // an array that will be populated with substring matches
                                        matches = [];
                                         
                                        // regex used to determine if a string contains the substring `q`
                                        substrRegex = new RegExp(q, "i");
                                         
                                        // iterate through the pool of strings and for any string that
                                        // contains the substring `q`, add it to the `matches` array
                                        $.each(strs, function(i, str) {
                                                if (substrRegex.test(str)) {
                                                        // the typeahead jQuery plugin expects suggestions to a
                                                        // JavaScript object, refer to typeahead docs for more info
                                                        matches.push({ value: str });
                                                }
                                        });
                                         
                                        cb(matches);
                                };
                        };
                ', CClientScript::POS_HEAD);
                
                $source_list = !empty($this->options) ? CJavaScript::encode($this->datasets['source']) : '';
                Yii::app()->clientScript->registerScript(__CLASS__ . '#source_list#'.$this->id, '
                        var _'.$this->id.'_source_list = '.$source_list.';
                ', CClientScript::POS_HEAD);
        }
}