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[autoinstallsdev/mediawiki.git] / includes / htmlform / fields / HTMLMultiSelectField.php
diff --git a/includes/htmlform/fields/HTMLMultiSelectField.php b/includes/htmlform/fields/HTMLMultiSelectField.php
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+<?php
+
+/**
+ * Multi-select field
+ */
+class HTMLMultiSelectField extends HTMLFormField implements HTMLNestedFilterable {
+       /**
+        * @param array $params
+        *   In adition to the usual HTMLFormField parameters, this can take the following fields:
+        *   - dropdown: If given, the options will be displayed inside a dropdown with a text field that
+        *     can be used to filter them. This is desirable mostly for very long lists of options.
+        *     This only works for users with JavaScript support and falls back to the list of checkboxes.
+        *   - flatlist: If given, the options will be displayed on a single line (wrapping to following
+        *     lines if necessary), rather than each one on a line of its own. This is desirable mostly
+        *     for very short lists of concisely labelled options.
+        */
+       public function __construct( $params ) {
+               parent::__construct( $params );
+
+               // If the disabled-options parameter is not provided, use an empty array
+               if ( isset( $this->mParams['disabled-options'] ) === false ) {
+                       $this->mParams['disabled-options'] = [];
+               }
+
+               // For backwards compatibility, also handle the old way with 'cssclass' => 'mw-chosen'
+               if ( isset( $params['dropdown'] ) || strpos( $this->mClass, 'mw-chosen' ) !== false ) {
+                       $this->mClass .= ' mw-htmlform-dropdown';
+               }
+
+               if ( isset( $params['flatlist'] ) ) {
+                       $this->mClass .= ' mw-htmlform-flatlist';
+               }
+       }
+
+       public function validate( $value, $alldata ) {
+               $p = parent::validate( $value, $alldata );
+
+               if ( $p !== true ) {
+                       return $p;
+               }
+
+               if ( !is_array( $value ) ) {
+                       return false;
+               }
+
+               # If all options are valid, array_intersect of the valid options
+               # and the provided options will return the provided options.
+               $validOptions = HTMLFormField::flattenOptions( $this->getOptions() );
+
+               $validValues = array_intersect( $value, $validOptions );
+               if ( count( $validValues ) == count( $value ) ) {
+                       return true;
+               } else {
+                       return $this->msg( 'htmlform-select-badoption' );
+               }
+       }
+
+       public function getInputHTML( $value ) {
+               if ( isset( $this->mParams['dropdown'] ) ) {
+                       $this->mParent->getOutput()->addModules( 'jquery.chosen' );
+               }
+
+               $value = HTMLFormField::forceToStringRecursive( $value );
+               $html = $this->formatOptions( $this->getOptions(), $value );
+
+               return $html;
+       }
+
+       public function formatOptions( $options, $value ) {
+               $html = '';
+
+               $attribs = $this->getAttributes( [ 'disabled', 'tabindex' ] );
+
+               foreach ( $options as $label => $info ) {
+                       if ( is_array( $info ) ) {
+                               $html .= Html::rawElement( 'h1', [], $label ) . "\n";
+                               $html .= $this->formatOptions( $info, $value );
+                       } else {
+                               $thisAttribs = [
+                                       'id' => "{$this->mID}-$info",
+                                       'value' => $info,
+                               ];
+                               if ( in_array( $info, $this->mParams['disabled-options'], true ) ) {
+                                       $thisAttribs['disabled'] = 'disabled';
+                               }
+                               $checked = in_array( $info, $value, true );
+
+                               $checkbox = $this->getOneCheckbox( $checked, $attribs + $thisAttribs, $label );
+
+                               $html .= ' ' . Html::rawElement(
+                                       'div',
+                                       [ 'class' => 'mw-htmlform-flatlist-item' ],
+                                       $checkbox
+                               );
+                       }
+               }
+
+               return $html;
+       }
+
+       protected function getOneCheckbox( $checked, $attribs, $label ) {
+               if ( $this->mParent instanceof OOUIHTMLForm ) {
+                       throw new MWException( 'HTMLMultiSelectField#getOneCheckbox() is not supported' );
+               } else {
+                       $elementFunc = [ 'Html', $this->mOptionsLabelsNotFromMessage ? 'rawElement' : 'element' ];
+                       $checkbox =
+                               Xml::check( "{$this->mName}[]", $checked, $attribs ) .
+                               '&#160;' .
+                               call_user_func( $elementFunc,
+                                       'label',
+                                       [ 'for' => $attribs['id'] ],
+                                       $label
+                               );
+                       if ( $this->mParent->getConfig()->get( 'UseMediaWikiUIEverywhere' ) ) {
+                               $checkbox = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
+                                       $checkbox .
+                                       Html::closeElement( 'div' );
+                       }
+                       return $checkbox;
+               }
+       }
+
+       /**
+        * Get options and make them into arrays suitable for OOUI.
+        * @return array Options for inclusion in a select or whatever.
+        */
+       public function getOptionsOOUI() {
+               $options = parent::getOptionsOOUI();
+               foreach ( $options as &$option ) {
+                       $option['disabled'] = in_array( $option['data'], $this->mParams['disabled-options'], true );
+               }
+               return $options;
+       }
+
+       /**
+        * Get the OOUI version of this field.
+        *
+        * @since 1.28
+        * @param string[] $value
+        * @return OOUI\CheckboxMultiselectInputWidget
+        */
+       public function getInputOOUI( $value ) {
+               $this->mParent->getOutput()->addModules( 'oojs-ui-widgets' );
+
+               $attr = [];
+               $attr['id'] = $this->mID;
+               $attr['name'] = "{$this->mName}[]";
+
+               $attr['value'] = $value;
+               $attr['options'] = $this->getOptionsOOUI();
+
+               if ( $this->mOptionsLabelsNotFromMessage ) {
+                       foreach ( $attr['options'] as &$option ) {
+                               $option['label'] = new OOUI\HtmlSnippet( $option['label'] );
+                       }
+               }
+
+               $attr += OOUI\Element::configFromHtmlAttributes(
+                       $this->getAttributes( [ 'disabled', 'tabindex' ] )
+               );
+
+               if ( $this->mClass !== '' ) {
+                       $attr['classes'] = [ $this->mClass ];
+               }
+
+               return new OOUI\CheckboxMultiselectInputWidget( $attr );
+       }
+
+       /**
+        * @param WebRequest $request
+        *
+        * @return string|array
+        */
+       public function loadDataFromRequest( $request ) {
+               if ( $this->isSubmitAttempt( $request ) ) {
+                       // Checkboxes are just not added to the request arrays if they're not checked,
+                       // so it's perfectly possible for there not to be an entry at all
+                       return $request->getArray( $this->mName, [] );
+               } else {
+                       // That's ok, the user has not yet submitted the form, so show the defaults
+                       return $this->getDefault();
+               }
+       }
+
+       public function getDefault() {
+               if ( isset( $this->mDefault ) ) {
+                       return $this->mDefault;
+               } else {
+                       return [];
+               }
+       }
+
+       public function filterDataForSubmit( $data ) {
+               $data = HTMLFormField::forceToStringRecursive( $data );
+               $options = HTMLFormField::flattenOptions( $this->getOptions() );
+
+               $res = [];
+               foreach ( $options as $opt ) {
+                       $res["$opt"] = in_array( $opt, $data, true );
+               }
+
+               return $res;
+       }
+
+       protected function needsLabel() {
+               return false;
+       }
+}