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<?php |
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/** |
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* @copyright Copyright (c) 2013-2019 Sergio Coderius! |
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* @link https://coderius.biz.ua |
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* @license This program is free software: the MIT License (MIT) |
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* @author Sergio Coderius <[email protected]> |
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*/ |
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namespace coderius\pell; |
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use yii\helpers\Html; |
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use yii\helpers\Json; |
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use coderius\pell\PellInputWidget; |
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use yii\web\View; |
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use yii\web\JsExpression; |
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use yii\helpers\ArrayHelper; |
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use yii\base\InvalidArgumentException; |
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/** |
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* Pell widget renders a pell js plugin for WYSIWYG editing. |
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* |
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* For example to use the Pell widget with a [[\yii\base\Model|model]]: |
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* |
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* ```php |
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* echo Pell::widget([ |
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* 'model' => $model, |
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* 'attribute' => 'text', |
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* ]); |
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* ``` |
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* |
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* The following example will used not as an element of form: |
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* |
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* ```php |
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* echo Pell::widget([ |
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* 'asFormPart' => false, |
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* 'value' => $value, |
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* ]); |
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* ``` |
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* |
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* You can also use this widget in an [[\yii\widgets\ActiveForm|ActiveForm]] using the [[\yii\widgets\ActiveField::widget()|widget()]] |
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* method, for example like this: |
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* |
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* ```php |
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* use coderius\pell\Pell; |
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* |
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* <?= $form->field($model, 'text')->widget(Pell::className(), []);?> |
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* ``` |
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* |
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* Note that if Pell widget using inside form - [Pell::asFormPart] must be set to true (by default) |
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* |
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* @author Sergio Coderius <[email protected]> |
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*/ |
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class Pell extends PellInputWidget |
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{ |
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/** |
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* If widget used inside form, then param `$asFormPart` must be set as true and tag textarea (hidden) must be created |
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* |
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* @var boolean |
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*/ |
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public $asFormPart = true; |
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/** |
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* Container tag for widget |
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* |
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* @var array |
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*/ |
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public $wrapperOptions = []; |
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/** |
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* @var array the options for the Pell JS plugin. |
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* Please refer to the Pell JS plugin Web page for possible options. |
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* @see https://github.com/jaredreich/pell/blob/master/README.md |
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*/ |
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public $clientOptions = []; |
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protected $clientPluginInstanceName = 'pell'; |
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/** |
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* Initializes the Pell widget. |
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* This method will initialize required property values and create wrapper html tag. |
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* @return void |
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*/ |
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public function init() |
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{ |
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parent::init(); |
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//Attribute id in textarea must be set |
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if(!isset($this->inputOptions['id']) && true === $this->asFormPart){ |
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$pell = $this->clientPluginInstanceName; |
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$this->inputOptions['id'] = "$pell-textarea-" . $this->getId(); |
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} |
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//In Html::textarea attribute name must be set |
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if(!$this->name && true === $this->asFormPart && false === $this->hasModel()){ |
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throw new InvalidArgumentException("Param 'name' must be specified for textarea attribute name."); |
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} |
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if(!isset($this->wrapperOptions['tag'])){ |
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$this->wrapperOptions['tag'] = 'div'; |
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} |
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if(!isset($this->wrapperOptions['id'])){ |
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$this->wrapperOptions['id'] = $this->getWrapperId(); |
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} |
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if(!isset($this->wrapperOptions['class'])){ |
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//From yii\widgets\ActiveField [$inputOptions = ['class' => 'form-control']] |
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$this->wrapperOptions['class'] = 'form-control'; |
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Html::addCssStyle($this->wrapperOptions, 'height: auto', false); |
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} |
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//If widget is used as part of the form, setting [clientOptions['onChange']] from widget options not allowed |
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if(isset($this->clientOptions['onChange']) && $this->asFormPart){ |
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throw new InvalidArgumentException("Param 'onChange' cannot be specified if the widget is used as part of the form."); |
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} |
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if(isset($this->clientOptions['element'])){ |
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throw new InvalidArgumentException("Param 'element' cannot be specified. This param set by widget."); |
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} |
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} |
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/** |
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* Runs the widget. |
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*/ |
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public function run() |
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{ |
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echo $this->renderWidget() . "\n"; |
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$js = $this->buildClientScript(); |
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$this->registerClientScript($js); |
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} |
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/** |
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* Renders the Pell widget. |
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* @return string the rendering result. |
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*/ |
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protected function renderWidget() |
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{ |
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$content = null; |
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//If [$this->asFormPart === true] then create hidden textarea inside wrapper to seva passed data |
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if($this->asFormPart){ |
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$content = $this->getTextArea(); |
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} |
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$tag = $this->getWrapperTag(); |
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ArrayHelper::remove($this->wrapperOptions, 'tag'); |
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return Html::tag($tag, $content, $this->wrapperOptions); |
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} |
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/** |
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* Build js script |
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* |
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* @return string |
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*/ |
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protected function buildClientScript() |
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{ |
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$js = []; |
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$wrapperId = $this->getWrapperId(); |
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$element = new JsExpression("document.getElementById('$wrapperId')"); |
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$this->clientOptions['element'] = $element; |
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//If widget used inside form and needed generete [Html::textarea] or [Html::activeTextarea] |
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if($this->asFormPart){ |
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$textAreaId = $this->getTextAreaId(); |
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//Write content from editor to hidden texarea when that was changed |
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$this->clientOptions['onChange'] = new JsExpression( |
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"html => { |
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document.getElementById('$textAreaId').innerHTML = html; |
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}," |
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); |
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} |
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$clientOptions = Json::encode($this->clientOptions); |
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$pell = $this->clientPluginInstanceName; |
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//Editor js instance constant name |
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$editorJsVar = "{$pell}Editor_" . $this->getId(); |
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//Init plugin javascript |
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$js[] = "";//set \n |
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$js[] = "const $editorJsVar = $pell.init($clientOptions);"; |
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//If isset default value like value from db, or if set `$this->value` |
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if($this->hasDefaultValue()){ |
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$defVal = $this->getDefaultValue(); |
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//Pass value to editor |
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$js[] = new JsExpression("$editorJsVar.content.innerHTML = `$defVal`"); |
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} |
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$js[] = "";//set \n |
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return implode("\n", $js); |
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} |
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/** |
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* Registers Pell js plugin |
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* @param string $js the JS code block to be registered |
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* @param string $key the key that identifies the JS code block. If null, it will use |
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* $js as the key. If two JS code blocks are registered with the same key, the latter |
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* will overwrite the former. |
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* |
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* @return void |
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*/ |
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protected function registerClientScript($js, $key = null) |
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{ |
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$view = $this->getView(); |
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PellAsset::register($view); |
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$view->registerJs($js, View::POS_END, $key); |
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} |
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/** |
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* Generates a textarea tag for the given model attribute. |
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* The model attribute value will be used as the content in the textarea. |
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* |
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* @return void |
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*/ |
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protected function getTextArea() |
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{ |
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Html::addCssStyle($this->inputOptions, 'display:none;'); |
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if ($this->hasModel()) { |
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$textarea = Html::activeTextarea($this->model, $this->attribute, $this->inputOptions); |
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} else { |
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$textarea = Html::textarea($this->name, $this->value, $this->inputOptions); |
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} |
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return $textarea; |
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} |
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/** |
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* Return wrapper id for wrapper tag id attribute |
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* |
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* @return string |
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*/ |
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public function getWrapperId() |
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{ |
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$pell = $this->clientPluginInstanceName; |
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return "$pell-wrap-". $this->getId(); |
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} |
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public function getWrapperClass() |
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{ |
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return $this->wrapperOptions['class']; |
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} |
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/** |
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* Return a textarea attribute id |
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* |
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* @return string |
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*/ |
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public function getTextAreaId() |
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{ |
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return $this->inputOptions['id']; |
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} |
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/** |
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* Return wrapper tag name |
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* |
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* @return string |
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*/ |
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public function getWrapperTag() |
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{ |
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return $this->wrapperOptions['tag']; |
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} |
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/** |
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* Return default value returned of model attribute if exists or by passed to `inputOptions['value']` |
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* |
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* @return string |
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*/ |
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protected function getDefaultValue() |
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{ |
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if ($this->hasModel()) { |
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$value = Html::getAttributeValue($this->model, $this->attribute); |
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} else { |
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$value = $this->value; |
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} |
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return $value; |
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} |
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/** |
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* Check is default value is not empty |
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* |
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* @return boolean |
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*/ |
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public function hasDefaultValue() |
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{ |
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return !empty($this->getDefaultValue()); |
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} |
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} |
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