HTMLFormFieldWithButton.php

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<?php
class HTMLFormFieldWithButton extends HTMLFormField {
    protected $mButtonClass = '';
 
    protected $mButtonId = '';
 
    protected $mButtonName = '';
 
    protected $mButtonType = 'submit';
 
    protected $mButtonValue;
 
    protected $mButtonFlags = [ 'progressive' ];
 
    public function __construct( $info ) {
        if ( isset( $info['buttonclass'] ) ) {
            $this->mButtonClass = $info['buttonclass'];
        }
        if ( isset( $info['buttonid'] ) ) {
            $this->mButtonId = $info['buttonid'];
        }
        if ( isset( $info['buttonname'] ) ) {
            $this->mButtonName = $info['buttonname'];
        }
        if ( isset( $info['buttondefault'] ) ) {
            $this->mButtonValue = $info['buttondefault'];
        }
        if ( isset( $info['buttontype'] ) ) {
            $this->mButtonType = $info['buttontype'];
        }
        if ( isset( $info['buttonflags'] ) ) {
            $this->mButtonFlags = $info['buttonflags'];
        }
        parent::__construct( $info );
    }
 
    public function getInputHTML( $value ) {
        $attr = [
            'class' => 'mw-htmlform-submit ' . $this->mButtonClass,
            'id' => $this->mButtonId,
        ] + $this->getAttributes( [ 'disabled', 'tabindex' ] );
 
        return Html::input( $this->mButtonName, $this->mButtonValue, $this->mButtonType, $attr );
    }
 
    public function getInputOOUI( $value ) {
        return new OOUI\ButtonInputWidget( [
            'name' => $this->mButtonName,
            'value' => $this->mButtonValue,
            'type' => $this->mButtonType,
            'label' => $this->mButtonValue,
            'flags' => $this->mButtonFlags,
        ] + OOUI\Element::configFromHtmlAttributes(
            $this->getAttributes( [ 'disabled', 'tabindex' ] )
        ) );
    }
 
    public function getElement( $element ) {
        return $element . "\u{00A0}" . $this->getInputHTML( '' );
    }
}