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<?php |
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/** |
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* The Carbon Pagination item collection class. |
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* Contains and manages the pagination items. |
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* Can generate the items based on the pagination settings. |
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*/ |
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class Carbon_Pagination_Collection { |
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/** |
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* @var array |
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* |
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* Pagination items. |
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*/ |
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protected $items = array(); |
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/** |
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* @var Carbon_Pagination_HTML |
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* |
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* The pagination object. |
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*/ |
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protected $pagination; |
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/** |
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* Constructor. |
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* Creates and configures a new pagination collection for the provided pagination. |
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* |
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* @param Carbon_Pagination_HTML $pagination Pagination object. |
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* @param bool $autogenerate Whether to automatically generate pagination items. |
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*/ |
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public function __construct( Carbon_Pagination_HTML $pagination, $autogenerate = true ) { |
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$this->set_pagination( $pagination ); |
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// whether to auto generate pagination items |
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$autogenerate = apply_filters( 'carbon_pagination_autogenerate_collection_items', $autogenerate, $this ); |
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if ( $autogenerate ) { |
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$this->generate(); |
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} |
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} |
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/** |
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* Generate the pagination items and wrappers. |
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*/ |
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public function generate() { |
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$this->generate_items(); |
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$this->generate_wrappers(); |
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// allow developers to modify the collection items after it was generated |
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do_action( 'carbon_pagination_collection_after_generate', $this ); |
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} |
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/** |
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* Retrieve the item prototypes for the collection. |
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* These represent the classes of all items that will be generated and their |
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* corresponding pagination methods that determine their availability. |
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*/ |
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public function get_item_prototypes() { |
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// condition method => item class |
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$item_classes = array( |
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'get_enable_current_page_text' => 'Carbon_Pagination_Item_Current_Page_Text', |
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'get_enable_first' => 'Carbon_Pagination_Item_First_Page', |
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'get_enable_prev' => 'Carbon_Pagination_Item_Previous_Page', |
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'get_enable_numbers' => 'Carbon_Pagination_Item_Number_Links', |
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'get_enable_next' => 'Carbon_Pagination_Item_Next_Page', |
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'get_enable_last' => 'Carbon_Pagination_Item_Last_Page', |
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); |
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// allow default methods => items to be filtered |
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return apply_filters( 'carbon_pagination_default_collection_items', $item_classes, $this ); |
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} |
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/** |
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* Generate the pagination items. |
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*/ |
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public function generate_items() { |
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$pagination = $this->get_pagination(); |
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$items = array(); |
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// allow default methods => items to be filtered |
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$item_classes = $this->get_item_prototypes(); |
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// if item is enabled, generate it |
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foreach ( $item_classes as $method => $classname ) { |
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if ( call_user_func( array( $pagination, $method ) ) ) { |
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$items[] = new $classname($this); |
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} |
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} |
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$this->set_items( $items ); |
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} |
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/** |
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* Generate the pagination wrappers. |
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*/ |
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public function generate_wrappers() { |
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$pagination = $this->get_pagination(); |
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$items = $this->get_items(); |
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if ( ! empty( $items ) ) { |
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// insert wrapper before the items |
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$wrapper_before = new Carbon_Pagination_Item_HTML( $this ); |
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$wrapper_before->set_html( $pagination->get_wrapper_before() ); |
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$this->insert_item_at( $wrapper_before, 0 ); |
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// insert wrapper after the items |
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$wrapper_after = new Carbon_Pagination_Item_HTML( $this ); |
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$wrapper_after->set_html( $pagination->get_wrapper_after() ); |
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$this->insert_item_at( $wrapper_after, count( $items ) + 1 ); |
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} |
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} |
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/** |
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* Retrieve the pagination object. |
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* |
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* @return Carbon_Pagination_HTML $pagination The pagination object. |
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*/ |
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public function get_pagination() { |
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return $this->pagination; |
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} |
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/** |
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* Modify the pagination object. |
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* |
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* @param Carbon_Pagination_HTML $pagination The new pagination object. |
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*/ |
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public function set_pagination( Carbon_Pagination_HTML $pagination ) { |
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$this->pagination = $pagination; |
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} |
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/** |
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* Retrieve the pagination items in the collection. |
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* |
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* @return array $items The pagination items, contained in the collection. |
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*/ |
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public function get_items() { |
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return $this->items; |
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} |
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/** |
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* Modify the pagination items in the collection. |
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* |
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* @param array $items The new set of pagination items. |
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*/ |
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public function set_items( $items = array() ) { |
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$this->items = $items; |
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} |
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/** |
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* Add item(s) to the collection. |
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* If $new_items is not an array, it will be treated as one item. |
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* If $new_items is an array, it will be treated as a set of items. |
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* |
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* @param mixed $new_items The set of pagination items to add. |
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*/ |
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public function add_items( $new_items = array() ) { |
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if ( ! is_array( $new_items ) ) { |
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$new_items = array( $new_items ); |
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} else { |
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$new_items = array_values( $new_items ); |
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} |
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$items = $this->get_items(); |
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$items = array_merge( $items, $new_items ); |
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$this->set_items( $items ); |
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} |
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/** |
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* Insert item(s) at a specified index in the collection. |
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* If the $item is an array, it will be treated as a set of items. |
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* If the $item is not an array, it will be treated as a single item. |
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* |
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* @param mixed $item The item(s) to insert. |
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* @param int $index The index to insert the item at. |
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*/ |
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public function insert_item_at( $item, $index ) { |
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$items = $this->get_items(); |
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if ( ! is_array( $item ) ) { |
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$item = array( $item ); |
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} |
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$before = array_slice( $items, 0, $index ); |
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$after = array_slice( $items, $index ); |
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$new_items = array_merge( $before, $item, $after ); |
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$this->set_items( $new_items ); |
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} |
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} |