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<?php
namespace OOUI;
/**
* Element containing a sequence of child elements.
*
* @abstract
*/
class GroupElement extends ElementMixin {
/**
* List of items in the group.
*
* @var Element[]
*/
protected $items = array();
public static $targetPropertyName = 'group';
/**
* @param Element $element Element being mixed into
* @param array $config Configuration options
*/
public function __construct( Element $element, array $config = array() ) {
// Parent constructor
$target = isset( $config['group'] ) ? $config['group'] : new Tag( 'div' );
parent::__construct( $element, $target, $config );
}
/**
* Check if there are no items.
*
* @return boolean Group is empty
*/
public function isEmpty() {
return !count( $this->items );
}
/**
* Get items.
*
* @return Element[] Items
*/
public function getItems() {
return $this->items;
}
/**
* Add items.
*
* Adding an existing item will move it.
*
* @param Element[] $items Items
* @param number $index Index to insert items at
* @chainable
*/
public function addItems( array $items, $index = null ) {
foreach ( $items as $item ) {
// Check if item exists then remove it first, effectively "moving" it
$currentIndex = array_search( $item, $this->items );
if ( $currentIndex !== false ) {
$this->removeItems( array( $item ) );
// Adjust index to compensate for removal
if ( $currentIndex < $index ) {
$index--;
}
}
// Add the item
$item->setElementGroup( $this );
}
if ( $index === null || $index < 0 || $index >= count( $this->items ) ) {
$this->items = array_merge( $this->items, $items );
} else {
array_splice( $this->items, $index, 0, $items );
}
// Update actual target element contents to reflect our list
$this->target->clearContent();
call_user_func_array( array( $this->target, 'appendContent' ), $this->items );
return $this;
}
/**
* Remove items.
*
* @param Element[] $items Items to remove
* @chainable
*/
public function removeItems( $items ) {
foreach ( $items as $item ) {
$index = array_search( $item, $this->items );
if ( $index !== false ) {
$item->setElementGroup( null );
array_splice( $this->items, $index, 1 );
}
}
// Update actual target element contents to reflect our list
$this->target->clearContent();
call_user_func_array( array( $this->target, 'appendContent' ), $this->items );
return $this;
}
/**
* Clear all items.
*
* Items will be detached, not removed, so they can be used later.
*
* @chainable
*/
public function clearItems() {
foreach ( $this->items as $item ) {
$item->setElementGroup( null );
}
$this->items = array();
$this->target->clearContent();
return $this;
}
public function getConfig( &$config ) {
$config['items'] = $this->items;
return parent::getConfig( $config );
}
}
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