<?php // +-----------------------------------------------------------------------+ // | Piwigo - a PHP based photo gallery | // +-----------------------------------------------------------------------+ // | Copyright(C) 2008-2011 Piwigo Team http://piwigo.org | // +-----------------------------------------------------------------------+ // | This program is free software; you can redistribute it and/or modify | // | it under the terms of the GNU General Public License as published by | // | the Free Software Foundation | // | | // | This program is distributed in the hope that it will be useful, but | // | WITHOUT ANY WARRANTY; without even the implied warranty of | // | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | // | General Public License for more details. | // | | // | You should have received a copy of the GNU General Public License | // | along with this program; if not, write to the Free Software | // | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | // | USA. | // +-----------------------------------------------------------------------+ class BlockManager { protected $id; protected $registered_blocks=array(); protected $display_blocks = array(); public function BlockManager($id) { $this->id = $id; } /** triggers an action that allows implementors of menu blocks to register the blocks*/ public function load_registered_blocks() { trigger_action('blockmanager_register_blocks', array(&$this) ); } public function get_id() { return $this->id; } public function get_registered_blocks() { return $this->registered_blocks; } /** registers a block with this menu. usually called as a result of menubar_register_blocks action * @param MenuBlock block */ public function register_block(&$block) { if ( isset($this->registered_blocks[$block->get_id()] ) ) { trigger_error("Block '".$block->get_id()."' is already registered", E_USER_WARNING); return false; } $this->registered_blocks[$block->get_id()] = &$block; return true; } /** performs one time preparation of registered blocks for display; * triggers the action menubar_prepare_display where implementors can * reposition or hide blocks */ public function prepare_display() { global $conf; $conf_id = 'blk_'.$this->id; $mb_conf = isset($conf[$conf_id]) ? $conf[$conf_id] : array(); if ( !is_array($mb_conf) ) $mb_conf = @unserialize($mb_conf); $idx = 1; foreach( $this->registered_blocks as $id => $block ) { $pos = isset( $mb_conf[$id] ) ? $mb_conf[$id] : $idx*50; if ( $pos>0 ) { $this->display_blocks[$id] = new DisplayBlock($block); $this->display_blocks[$id]->set_position($pos); } $idx++; } $this->sort_blocks(); trigger_action( 'blockmanager_prepare_display', array(&$this) ); $this->sort_blocks(); } /** returns true if the block whose id is hidden * @param string block_id */ public function is_hidden($block_id) { return isset($this->display_blocks[$block_id]) ? false : true; } public function hide_block($block_id) { unset( $this->display_blocks[$block_id] ); } public function &get_block($block_id) { $tmp = null; if ( isset($this->display_blocks[$block_id]) ) { return $this->display_blocks[$block_id]; } return $tmp; } public function set_block_position($block_id, $position) { if ( isset($this->display_blocks[$block_id]) ) { $this->display_blocks[$block_id]->set_position($position); } } protected function sort_blocks() { uasort( $this->display_blocks, array('BlockManager', 'cmp_by_position') ); } static protected function cmp_by_position($a, $b) { return $a->get_position() - $b->get_position(); } public function apply($var, $file) { global $template; $template->set_filename('menubar', $file); trigger_action('blockmanager_apply', array(&$this) ); foreach( $this->display_blocks as $id=>$block) { if (empty($block->raw_content) and empty($block->template) ) { $this->hide_block($id); } } $this->sort_blocks(); $template->assign('blocks', $this->display_blocks); $template->assign_var_from_handle($var, 'menubar'); } } /** * Represents a menu block registered in a Menu object. */ class RegisteredBlock { protected $id; protected $name; protected $owner; public function RegisteredBlock($id, $name, $owner) { $this->id = $id; $this->name = $name; $this->owner = $owner; } public function get_id() { return $this->id; } public function get_name() { return $this->name; } public function get_owner() { return $this->owner; } } /** * Represents a menu block ready for display in the Menu object. */ class DisplayBlock { protected $_registeredBlock; protected $_position; protected $_title; public $data; public $template; public $raw_content; public function DisplayBlock($registeredBlock) { $this->_registeredBlock = &$registeredBlock; } public function &get_block() { return $this->_registeredBlock; } public function get_position() { return $this->_position; } public function set_position($position) { $this->_position = $position; } public function get_title() { if (isset($this->_title)) return $this->_title; else return $this->_registeredBlock->get_name(); } public function set_title($title) { $this->_title = $title; } } ?>