[Sommaire] [Imprimer]

   1  <?php
   2  /**
   3   * The Horde_Tree_select:: class extends the Horde_Tree class to provide
   4   * <option> tag rendering.
   5   *
   6   * Copyright 2005-2006 Ben Chavet <ben@horde.org>
   7   *
   8   * See the enclosed file COPYING for license information (LGPL). If you did
   9   * not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
  10   *
  11   * $Horde: framework/Tree/Tree/select.php,v 1.2.2.7 2006/01/01 21:28:40 jan Exp $
  12   *
  13   * @author  Ben Chavet <ben@horde.org>
  14   * @package Horde_Tree
  15   * @since   Horde 3.1
  16   */
  17  class Horde_Tree_select extends Horde_Tree {
  18  
  19      /**
  20       * TODO
  21       *
  22       * @var array
  23       */
  24      var $_nodes = array();
  25  
  26      /**
  27       * Constructor.
  28       */
  29      function Horde_Tree_select($tree_name, $params)
  30      {
  31          parent::Horde_Tree($tree_name, $params);
  32          $this->_static = true;
  33      }
  34  
  35      /**
  36       * Returns the tree.
  37       *
  38       * @return string  The HTML code of the rendered tree.
  39       */
  40      function getTree()
  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          return $tree;
  49      }
  50  
  51      /**
  52       * Checks the current environment to see if we can render the HTML tree.
  53       * HTML is always renderable, at least until we add a php-gtk tree
  54       * backend, in which case this implementation will actually need a body.
  55       *
  56       * @static
  57       *
  58       * @return boolean  Whether or not this Tree:: backend will function.
  59       */
  60      function isSupported()
  61      {
  62          return true;
  63      }
  64  
  65      /**
  66       * Returns just the JS node definitions as a string. This is a no-op for
  67       * the select renderer.
  68       */
  69      function renderNodeDefinitions()
  70      {
  71      }
  72  
  73      /**
  74       * Adds additional parameters to a node.
  75       *
  76       * @param string $id     The unique node id.
  77       * @param array $params  Any other parameters to set.
  78       * <pre>
  79       * selected --  Whether this node is selected
  80       * </pre>
  81       */
  82      function addNodeParams($id, $params = array())
  83      {
  84          if (!is_array($params)) {
  85              $params = array($params);
  86          }
  87  
  88          $allowed = array('selected');
  89  
  90          foreach ($params as $param_id => $param_val) {
  91              /* Set only allowed and non-null params. */
  92              if (in_array($param_id, $allowed) && !is_null($param_val)) {
  93                  $this->_nodes[$id][$param_id] = $param_val;
  94              }
  95          }
  96      }
  97  
  98      /**
  99       * Recursive function to walk through the tree array and build the output.
 100       *
 101       * @access private
 102       *
 103       * @param string $node_id  The Node ID.
 104       *
 105       * @return string  The tree rendering.
 106       */
 107      function _buildTree($node_id)
 108      {
 109          $selected = $this->_nodes[$node_id]['selected'] ? ' selected="selected"' : '';
 110  
 111          $output = '<option value="' . htmlspecialchars($node_id) . '"' . $selected . '>' .
 112              str_repeat('&nbsp;&nbsp;', (int)$this->_nodes[$node_id]['indent']) . htmlspecialchars($this->_nodes[$node_id]['label']) .
 113              '</option>';
 114  
 115          if (isset($this->_nodes[$node_id]['children']) &&
 116              $this->_nodes[$node_id]['expanded']) {
 117              $num_subnodes = count($this->_nodes[$node_id]['children']);
 118              for ($c = 0; $c < $num_subnodes; $c++) {
 119                  $child_node_id = $this->_nodes[$node_id]['children'][$c];
 120                  $output .= $this->_buildTree($child_node_id);
 121              }
 122          }
 123  
 124          return $output;
 125      }
 126  
 127  }