1: <?php
  2: /**
  3:  * The Horde_Tree_Simplehtml:: class provides simple HTML rendering of a tree
  4:  * (no graphics).
  5:  *
  6:  * Copyright 2010-2012 Horde LLC (http://www.horde.org/)
  7:  *
  8:  * See the enclosed file COPYING for license information (LGPL). If you
  9:  * did not receive this file, see http://www.horde.org/licenses/lgpl21.
 10:  *
 11:  * @author   Michael Slusarz <slusarz@horde.org>
 12:  * @category Horde
 13:  * @license  http://www.horde.org/licenses/lgpl21 LGPL 2.1
 14:  * @package  Tree
 15:  */
 16: class Horde_Tree_Simplehtml extends Horde_Tree_Base
 17: {
 18:     /**
 19:      * Allowed parameters for nodes.
 20:      *
 21:      * @var array
 22:      */
 23:     protected $_allowed = array(
 24:         'class',
 25:         'url'
 26:     );
 27: 
 28:     /**
 29:      * Should the tree be rendered statically?
 30:      *
 31:      * @var boolean
 32:      */
 33:     protected $_static = true;
 34: 
 35:     /**
 36:      * Returns the tree.
 37:      *
 38:      * @return string  The HTML code of the rendered tree.
 39:      */
 40:     public function getTree($static = false)
 41:     {
 42:         $this->_buildIndents($this->_root_nodes);
 43: 
 44:         $tree = '';
 45:         foreach ($this->_root_nodes as $node_id) {
 46:             $tree .= $this->_buildTree($node_id);
 47:         }
 48: 
 49:         return $tree;
 50:     }
 51: 
 52:     /**
 53:      * Adds additional parameters to a node.
 54:      *
 55:      * @param string $id     The unique node id.
 56:      * @param array $params  Parameters to set (key/value pairs).
 57:      * <pre>
 58:      * class - CSS class to use with this node
 59:      * url - URL to link the node to
 60:      * </pre>
 61:      */
 62:     public function addNodeParams($id, $params = array())
 63:     {
 64:         parent::addNodeParams($id, $params);
 65:     }
 66: 
 67:     /**
 68:      * Recursive function to walk through the tree array and build the output.
 69:      *
 70:      * @param string $node_id  The Node ID.
 71:      *
 72:      * @return string  The tree rendering.
 73:      */
 74:     protected function _buildTree($node_id)
 75:     {
 76:         $node = $this->_nodes[$node_id];
 77: 
 78:         $output = '<div' .
 79:             (empty($node['class']) ? '' : ' class="' . $node['class'] . '"') .
 80:             '>';
 81:         if (isset($node['extra'][Horde_Tree::EXTRA_LEFT])) {
 82:             $output .= implode(' ', $node['extra'][Horde_Tree::EXTRA_LEFT]);
 83:         }
 84:         $output .= str_repeat('&nbsp;', $node['indent'] * 2);
 85: 
 86:         $output .= empty($node['url'])
 87:             ? $node['label']
 88:             : '<a href="' . strval($node['url']) . '">' . $node['label'] . '</a>';
 89:         if (isset($node['extra'][Horde_Tree::EXTRA_RIGHT])) {
 90:             $output .= implode(' ', $node['extra'][Horde_Tree::EXTRA_RIGHT]);
 91:         }
 92: 
 93:         if (isset($node['children'])) {
 94:             $output .= '&nbsp;[' .
 95:                 $this->_generateUrlTag($node_id) .
 96:                 ($node['expanded'] ? '-' : '+') .
 97:                 '</a>]';
 98:         }
 99: 
100:         $output .= '</div>';
101: 
102:         if (isset($node['children']) && $node['expanded']) {
103:             foreach ($node['children'] as $val) {
104:                 $output .= $this->_buildTree($val);
105:             }
106:         }
107: 
108:         return $output;
109:     }
110: 
111:     /**
112:      * Generate a link URL.
113:      *
114:      * @param string $node_id  The node ID.
115:      *
116:      * @return string  The link tag.
117:      */
118:     protected function _generateUrlTag($node_id)
119:     {
120:         $url = new Horde_Url($_SERVER['PHP_SELF']);
121:         return $url->add(Horde_Tree::TOGGLE . $this->_instance, $node_id)->link();
122:     }
123: 
124: }
125: