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<?php
/**
* @copyright Copyright © Kartik Visweswaran, Krajee.com, 2014 - 2018
* @package yii2-widgets
* @subpackage yii2-widget-spinner
* @version 1.0.1
*/
namespace kartik\spinner;
use Yii;
use kartik\base\Widget;
use yii\helpers\Html;
use yii\helpers\ArrayHelper;
use yii\helpers\Json;
/**
* A widget that wraps the spin.js - an animated CSS3 loading spinner
* with VML fallback for IE.
*
* @author Kartik Visweswaran <kartikv2@gmail.com>
*/
class Spinner extends Widget
{
const TINY = 'tiny';
const SMALL = 'small';
const MEDIUM = 'medium';
const LARGE = 'large';
/**
* @var string the spinner preset to apply.
* - if this is set to one of 'tiny', 'small', or 'large', it will override any
* other settings in `pluginOptions`
* - if this is set to a string other than the defined presets
* - if `pluginOptions` is also set, then it will create a preset with this name
* for the client session and apply the settings
* - if `pluginOptions` is not set, an InvalidConfigException will be raised
* - if this is set to `false`, the spinner will be stopped and removed.
* - if this is not set or is null, the settings in pluginOptions will be used.
*/
public $preset;
/**
* @var string the color (hex/name) to apply to the spinner. If not specified
* it will inherit the spinner container color
*/
public $color;
/**
* @var boolean is the spinner hidden by default. Defaults to `false`.
*/
public $hidden = false;
/**
* @var string alignment of the spinner with respect to the parent, defaults
* to center. If set to `left` or `right`, this will wrap it in a container
* with the respective floats. By default, the spinner will be aligned 'center'
* and `top` of the parent element.
*/
public $align = 'center';
/**
* @var string caption embedded inside the spinner. This is not HTML encoded.
* If you set it to an empty string, this will not be displayed.
*/
public $caption = '';
/**
* @var array HTML options for the caption container. The following additional
* attributes can be set:
* - `tag`: string the `tag` for rendering the container. Defaults to `span`,
*/
public $captionOptions = [];
/**
* @var array the HTML attributes for the combined container enclosing the spinner
* and caption. The following additional attributes can be set:
* - `tag`: string the `tag` for rendering the container. Defaults to `div`,
*/
public $options = [];
/**
* @var array the HTML attributes for the spinner container. The following
* additional attributes can be set:
* - `tag`: string the `tag` for rendering the container. Defaults to `div`,
*/
public $spinOptions = [];
/**
* @var array the widths for each preset.
*/
private $_presets = [
self::TINY,
self::SMALL,
self::MEDIUM,
self::LARGE,
];
/**
* @var boolean is the preset valid
*/
private $_validPreset = false;
/**
* @inheritdoc
*/
public function run()
{
$this->_validPreset = (!empty($this->preset) && in_array($this->preset, $this->_presets));
// Spinner
$tag = ArrayHelper::remove($this->spinOptions, 'tag', 'div');
Html::addCssClass($this->spinOptions, 'kv-spin kv-spin-' . $this->align);
$spinner = Html::tag($tag, ' ', $this->spinOptions);
// Caption
$tag = ArrayHelper::remove($this->captionOptions, 'tag', ($this->align == 'left' || $this->align == 'right') ? 'span' : 'div');
Html::addCssClass($this->captionOptions, ($this->_validPreset ? "kv-spin-{$this->preset}-{$this->align}" : ''));
$caption = trim($this->caption);
$caption = empty($caption) ? '' : Html::tag($tag, $this->caption, $this->captionOptions);
// Spinner + Caption
Html::addCssClass($this->options, "kv-spin-{$this->align}" . ($this->hidden ? " kv-hide" : ""));
$tag = ArrayHelper::remove($this->options, 'tag', 'div');
echo Html::tag($tag, $spinner . "\n" . $caption, $this->options);
$this->registerAssets();
}
/**
* Registers the needed assets
*/
public function registerAssets()
{
$view = $this->getView();
SpinnerAsset::register($view);
$id = 'jQuery("#' . $this->options['id'] . '").find(".kv-spin")';
if ($this->_validPreset) {
$js = (isset($this->color)) ? "{$id}.spin('{$this->preset}', '{$this->color}');" : "{$id}.spin('{$this->preset}');";
} elseif ($this->preset === false) {
$js = "{$id}.spin(false);";
} else {
$options = Json::encode($this->pluginOptions);
$js = $id . '.spin(' . $options . ');';
if (!empty($this->preset) && is_string($this->preset)) {
$js = "$.fn.spin.presets.{$this->preset} = {$options};\n{$id}.spin('{$this->preset}');";
}
}
$view->registerJs($js);
}
}