FileInput.php
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<?php
/**
* @copyright Copyright © Kartik Visweswaran, Krajee.com, 2014 - 2015
* @package yii2-widgets
* @subpackage yii2-widget-fileinput
* @version 1.0.3
*/
namespace kartik\file;
use Yii;
use yii\helpers\Html;
use yii\helpers\ArrayHelper;
use yii\web\JsExpression;
/**
* FileInput widget styled for Bootstrap 3.0 with ability to multiple file
* selection and preview, format button styles and inputs. Runs on all modern
* browsers supporting HTML5 File Inputs and File Processing API. For browser
* versions IE9 and below, this widget will gracefully degrade to normal HTML
* file input.
*
* Wrapper for the Bootstrap FileInput JQuery Plugin by Krajee
*
* @see http://plugins.krajee.com/bootstrap-fileinput
* @see https://github.com/kartik-v/bootstrap-fileinput
*
* @author Kartik Visweswaran <kartikv2@gmail.com>
* @since 2.0
* @see http://twitter.github.com/typeahead.js/examples
*/
class FileInput extends \kartik\base\InputWidget
{
use \kartik\base\TranslationTrait;
/**
* @var bool whether to show 'plugin unsupported' message for IE browser versions 9 & below
*/
public $showMessage = true;
/*
* @var array HTML attributes for the container for the warning
* message for browsers running IE9 and below.
*/
public $messageOptions = ['class' => 'alert alert-warning'];
/**
* @var array the internalization configuration for this widget
*/
public $i18n = [];
/**
* @var array initialize the FileInput widget
*/
public function init()
{
parent::init();
$this->_msgCat = 'fileinput';
$this->initI18N(__DIR__);
$this->initLanguage();
$this->registerAssets();
if ($this->pluginLoading) {
Html::addCssClass($this->options, 'file-loading');
}
$input = $this->getInput('fileInput');
$script = 'document.getElementById("' . $this->options['id'] . '").className.replace(/\bfile-loading\b/,"");';
if ($this->showMessage) {
$validation = ArrayHelper::getValue($this->pluginOptions, 'showPreview', true) ? 'file preview and multiple file upload' : 'multiple file upload';
$message = '<strong>' . Yii::t('fileinput', 'Note:') . '</strong> ' . Yii::t('fileinput', 'Your browser does not support {validation}. Try an alternative or more recent browser to access these features.', ['validation' => $validation]);
$content = Html::tag('div', $message, $this->messageOptions) . "<script>{$script};</script>";
$input .= "\n" . $this->validateIE($content);
}
echo $input;
}
/**
* Validates and returns content based on IE browser version validation
*
* @param string $content
* @param string $validation
* @return string
*/
protected function validateIE($content, $validation = 'lt IE 10')
{
return "<!--[if {$validation}]><br>{$content}<![endif]-->";
}
/**
* Registers the asset bundle and locale
*/
public function registerAssetBundle() {
$view = $this->getView();
FileInputAsset::register($view)->addLanguage($this->language, 'fileinput_locale_');
}
/**
* Registers the needed assets
*/
public function registerAssets()
{
$this->registerAssetBundle();
$this->registerPlugin('fileinput');
}
}