--- /dev/null
+<?php
+
+namespace OOUI;
+
+/**
+ * Multiple checkbox input widget. Intended to be used within a OO.ui.FormLayout.
+ */
+class CheckboxMultiselectInputWidget extends InputWidget {
+
+ /* Properties */
+
+ /**
+ * @var string|null
+ */
+ protected $name = null;
+
+ /**
+ * Input value.
+ *
+ * @var string[]
+ */
+ protected $value = [];
+
+ /**
+ * Layouts for this input, as FieldLayouts.
+ *
+ * @var array
+ */
+ protected $fields = [];
+
+ /**
+ * @param array $config Configuration options
+ * @param array[] $config['options'] Array of menu options in the format
+ * `[ 'data' => …, 'label' => …, 'disabled' => … ]`
+ */
+ public function __construct( array $config = [] ) {
+ // Parent constructor
+ parent::__construct( $config );
+
+ if ( isset( $config['name'] ) ) {
+ $this->name = $config['name'];
+ }
+
+ // Initialization
+ $this->setOptions( isset( $config['options'] ) ? $config['options'] : [] );
+ // Have to repeat this from parent, as we need options to be set up for this to make sense
+ $this->setValue( isset( $config['value'] ) ? $config['value'] : null );
+ $this->addClasses( [ 'oo-ui-checkboxMultiselectInputWidget' ] );
+ }
+
+ protected function getInputElement( $config ) {
+ // Actually unused
+ return new Tag( 'unused' );
+ }
+
+ /**
+ * Set the value of the input.
+ *
+ * @param string[] $value New value
+ * @return $this
+ */
+ public function setValue( $value ) {
+ $this->value = $this->cleanUpValue( $value );
+ // Deselect all options
+ foreach ( $this->fields as $field ) {
+ $field->getField()->setSelected( false );
+ }
+ // Select the requested ones
+ foreach ( $this->value as $key ) {
+ $this->fields[ $key ]->getField()->setSelected( true );
+ }
+ return $this;
+ }
+
+ /**
+ * Clean up incoming value.
+ *
+ * @param string[] $value Original value
+ * @return string[] Cleaned up value
+ */
+ protected function cleanUpValue( $value ) {
+ $cleanValue = [];
+ if ( !is_array( $value ) ) {
+ return $cleanValue;
+ }
+ foreach ( $value as $singleValue ) {
+ $singleValue = parent::cleanUpValue( $singleValue );
+ // Remove options that we don't have here
+ if ( !isset( $this->fields[ $singleValue ] ) ) {
+ continue;
+ }
+ $cleanValue[] = $singleValue;
+ }
+ return $cleanValue;
+ }
+
+ /**
+ * Set the options available for this input.
+ *
+ * @param array[] $options Array of menu options in the format
+ * `[ 'data' => …, 'label' => …, 'disabled' => … ]`
+ * @return $this
+ */
+ public function setOptions( $options ) {
+ $this->fields = [];
+
+ // Rebuild the checkboxes
+ $this->clearContent();
+ $name = $this->name;
+ foreach ( $options as $opt ) {
+ $optValue = parent::cleanUpValue( $opt['data'] );
+ $optDisabled = isset( $opt['disabled'] ) ? $opt['disabled'] : false;
+ $field = new FieldLayout(
+ new CheckboxInputWidget( [
+ 'name' => $name,
+ 'value' => $optValue,
+ 'disabled' => $this->isDisabled() || $optDisabled,
+ ] ),
+ [
+ 'label' => isset( $opt['label'] ) ? $opt['label'] : $optValue,
+ 'align' => 'inline',
+ ]
+ );
+
+ $this->fields[ $optValue ] = $field;
+ $this->appendContent( $field );
+ }
+
+ // Re-set the value, checking the checkboxes as needed.
+ // This will also get rid of any stale options that we just removed.
+ $this->setValue( $this->getValue() );
+
+ return $this;
+ }
+
+ public function setDisabled( $state ) {
+ parent::setDisabled( $state );
+ foreach ( $this->fields as $field ) {
+ $field->getField()->setDisabled( $this->isDisabled() );
+ }
+ return $this;
+ }
+
+ public function getConfig( &$config ) {
+ $o = [];
+ foreach ( $this->fields as $field ) {
+ $label = $field->getLabel();
+ $data = $field->getField()->getValue();
+ $disabled = $field->getField()->isDisabled();
+ $o[] = [ 'data' => $data, 'label' => $label, 'disabled' => $disabled ];
+ }
+ $config['options'] = $o;
+ return parent::getConfig( $config );
+ }
+}