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Select2Widget.php
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Select2Widget.php
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<?php
/**
* @link https://github.com/borodulin/yii2-select2
* @copyright Copyright (c) 2015 Andrey Borodulin
* @license https://github.com/borodulin/yii2-select2/blob/master/LICENSE
*/
namespace conquer\select2;
use conquer\helpers\Json;
use yii;
use yii\helpers\Html;
use yii\helpers\Url;
use yii\web\JsExpression;
use yii\widgets\InputWidget;
/**
* Class Select2Widget
* @package conquer\select2
* @link https://select2.github.io
* @author Andrey Borodulin
*/
class Select2Widget extends InputWidget
{
/**
* Points to use Bootstrap theme
* @var boolean
*/
public $bootstrap = true;
/**
* Language code
* Set False to disable
* @var string | boolean
*/
public $language;
/**
* Array data
* @example [['id'=>1, 'text'=>'enhancement'], ['id'=>2, 'text'=>'bug']]
* @var array
*/
public $data;
/**
* You can use Select2Action to provide AJAX data
* @see \yii\helpers\BaseUrl::to()
* @var array|string
*/
public $ajax;
/**
* @see \yii\helpers\BaseArrayHelper::map()
* @var array
*/
public $items = [];
/**
* A placeholder value can be defined and will be displayed until a selection is made
* @var string
*/
public $placeholder;
/**
* Multiple select boxes
* @var boolean
*/
public $multiple;
/**
* Tagging support
* @var boolean
*/
public $tags;
/**
* @link https://select2.github.io/options.html
* @var array
*/
public $settings = [];
/**
* If value is integer, then it passed as "cushion" parameter
* @link https://github.com/panorama-ed/maximize-select2-height
* @var mixed
*/
public $maximize = false;
/**
* @var string[] the JavaScript event handlers.
*/
public $events = [];
/**
* @inheritdoc
*/
public function init()
{
parent::init();
if ($this->tags) {
$this->options['data-tags'] = 'true';
$this->options['multiple'] = true;
}
if ($this->language) {
$this->options['data-language'] = $this->language;
}
if (!is_null($this->ajax)) {
$this->options['data-ajax--url'] = Url::to($this->ajax);
$this->options['data-ajax--cache'] = 'true';
}
if ($this->placeholder) {
$this->options['data-placeholder'] = $this->placeholder;
}
if ($this->multiple) {
$this->options['data-multiple'] = 'true';
$this->options['multiple'] = true;
}
if (!empty($this->data)) {
$this->options['data-data'] = Json::encode($this->data);
}
if (!isset($this->options['class'])) {
$this->options['class'] = 'form-control';
}
if ($this->bootstrap) {
$this->options['data-theme'] = 'bootstrap';
}
if ($this->multiple || !empty($this->settings['multiple'])) {
if ($this->hasModel()) {
$name = isset($this->options['name']) ? $this->options['name'] : Html::getInputName($this->model, $this->attribute);
} else {
$name = $this->name;
}
if (substr($name, -2) != '[]') {
$this->options['name'] = $this->name = $name . '[]';
}
}
}
/**
* @inheritdoc
*/
public function run()
{
if ($this->hasModel()) {
echo Html::activeDropDownList($this->model, $this->attribute, $this->items, $this->options);
} else {
echo Html::dropDownList($this->name, $this->value, $this->items, $this->options);
}
$this->registerAssets();
}
/**
* Registers Assets
*/
public function registerAssets()
{
$view = $this->getView();
/** @var yii\web\AssetBundle $bandle */
$bandle = Select2Asset::register($view);
if ($this->language !== false) {
$langs[0] = $this->language ? $this->language : Yii::$app->language;
if (($pos = strpos($langs[0], '-')) > 0) {
// If "en-us" is not found, try to use "en".
$langs[1] = substr($langs[0], 0, $pos);
}
foreach ($langs as $lang) {
$langFile = "/js/i18n/{$lang}.js";
if (file_exists($bandle->sourcePath . $langFile)) {
$view->registerJsFile($bandle->baseUrl . $langFile, ['depends' => Select2Asset::className()]);
break;
}
}
}
if ($this->bootstrap) {
Select2BootstrapAsset::register($view);
}
$settings = Json::encode($this->settings);
$js = "jQuery('#{$this->options['id']}').select2($settings)";
if ($this->maximize) {
Select2MaximizeAsset::register($view);
if (is_integer($this->maximize)) {
$this->maximize = "{cushion: $this->maximize}";
} elseif (is_array($this->maximize)) {
$this->maximize = Json::encode($this->maximize);
} else {
$this->maximize = '{}';
}
$js .= ".maximizeSelect2Height($this->maximize)";
}
foreach ($this->events as $event => $handler) {
$js .= '.on("' . $event . '", ' . new JsExpression($handler) . ')';
}
$view->registerJs("$js;");
}
}