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<?php
// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based picture gallery |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008-2010 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);
$template->assign(array('U_REDIRECT' => $_SERVER['REQUEST_URI']));
trigger_action('blockmanager_apply', array(&$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;
}
}
?>
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