class_tree.php

jsp程序开发系统

<?php
// $Id: class_Tree.php,v 1.5 2004/02/06 04:46:59 deskpro Exp $

/**
* HTML_TreeMenu Class
* @author  Richard Heyes
* @author  Harald Radi
* @access  public
* @package HTML_TreeMenu
*/

class HTML_TreeMenu
{
	/**
    * Indexed array of subnodes
	* @var array
    */
	var $items;

	/**
    * The layer ID
	* @var string
    */
	var $layer;

	/**
    * Path to the images
	* @var string
    */
	var $images;

	/**
    * Name of the object
	* This should not be changed without changing
	* the javascript.
	* @var string
    */
	var $menuobj;

	/**
    * Constructor
	*
	* @access public
	* @param  string $layer          The name of the layer to add the HTML to.
	*                                In browsers that do not support document.all
	*                                or document.getElementById(), document.write()
	*                                is used, and thus this layer name has no effect.
	* @param  string $images         The path to the images folder.
	* @param  string $linkTarget     The target for the link. Defaults to "_self"
	* @param  string $usePersistence Whether to use clientside persistence. This option
	*                                only affects ie5+.
    */
	function HTML_TreeMenu($layer, $images, $linkTarget = '_self', $usePersistence = true)
	{
		$this->menuobj        = 'objTreeMenu';
		$this->layer          = $layer;
		$this->images         = $images;
		$this->linkTarget     = $linkTarget;
		$this->usePersistence = $usePersistence;
	}

	/**
    * This function adds an item to the the tree.
	*
	* @access public
	* @param  object $menu The node to add. This object should be
	*                      a HTML_TreeNode object.
	* @return object       Returns a reference to the new node inside
	*                      the tree.
    */
	function &addItem(&$menu)
	{
		$this->items[] = &$menu;
		return $this->items[count($this->items) - 1];
	}

	/**
    * This function prints the menu Jabbascript code. Should
	* be called *AFTER* your layer tag has been printed. In the
	* case of older browsers, eg Navigator 4, The menu HTML will
	* appear where this function is called.
	*
	* @access public
    */ 
	function printMenu()
	{
		echo "\n";

 		echo '<script language="javascript" type="text/javascript">' . "\n\t";
		echo sprintf('%s = new TreeMenu("%s", "%s", "%s", "%s");',
		             $this->menuobj,
					 $this->layer,
					 $this->images,
					 $this->menuobj,
					 $this->linkTarget);
 
		echo "\n";

		if (isset($this->items)) {
			for ($i=0; $i<count($this->items); $i++) {
				$this->items[$i]->_printMenu($this->menuobj . ".n[$i]");
			}
		}

 		echo sprintf("\n\t%s.drawMenu();", $this->menuobj);
		if ($this->usePersistence) {
			echo sprintf("\n\t%s.resetBranches();", $this->menuobj);
		}
		echo "\n</script>";
	}

} // HTML_TreeMenu

/**
* HTML_TreeNode class
* 
* This class is supplementary to the above and provides a way to
* add nodes to the tree. A node can have other nodes added to it. 
*
* @author  Richard Heyes
* @author  Harald Radi
* @access  public
* @package HTML_TreeMenu
*/
class HTML_TreeNode
{
	/**
    * The text for this node.
	* @var string
    */
	var $text;

	/**
    * The link for this node.
	* @var string
    */
	var $link;

	/**
    * The icon for this node.
	* @var string
    */
	var $icon;

	/**
    * Indexed array of subnodes
	* @var array
    */
	var $items;

	/**
    * Whether this node is expanded or not
	* @var bool
    */
	var $expanded;

	/**
    * Constructor
	*
	* @access public
	* @param  string $text      The description text for this node
	* @param  string $link      The link for the text
	* @param  string $icon      Optional icon to appear to the left of the text
	* @param  bool   $expanded  Whether this node is expanded or not (IE only)
	* @param  bool   $isDynamic Whether this node is dynamic or not (no affect on non-supportive browsers)
    */
	function HTML_TreeNode($text = null, $link = null, $icon = null, $expanded = false, $isDynamic = true)
	{
		$this->text      = (string)$text;
		$this->link      = (string)$link;
		$this->icon      = (string)$icon;
		$this->expanded  = $expanded;
		$this->isDynamic = $isDynamic;
	}

	/**
    * Adds a new subnode to this node.
	*
	* @access public
	* @param  object $node The new node
    */
	function &addItem(&$node)
	{
		$this->items[] = &$node;
		return $this->items[count($this->items) - 1];
	}

	/**
    * Prints jabbascript for this particular node.
	*
	* @access private
	* @param  string $prefix The jabbascript object to assign this node to.
    */
	function _printMenu($prefix)
	{
		echo sprintf("\t%s = new TreeNode('%s', %s, %s, %s, %s);\n",
		             $prefix,
		             htmlspecialchars($this->text),
		             !empty($this->icon) ? "'" . $this->icon . "'" : 'null',
		             !empty($this->link) ? "'" . $this->link . "'" : 'null',
					 $this->expanded  ? 'true' : 'false',
					 $this->isDynamic ? 'true' : 'false');

		if (!empty($this->items)) {
			for ($i=0; $i<count($this->items); $i++) {
				$this->items[$i]->_printMenu($prefix . ".n[$i]");
			}
		}
	}
}

// +-----------------------------------------------------------------------+
// | END OF PEAR COPYRIGHT                                                 |
// +-----------------------------------------------------------------------+

/**
* Builds a tree menu object out of two
* mysql tables.
*
* EXPECTS
*  o A global variable $db (database object from Deskpro)
* 
*/

class categoryTree
{
	var $catLinkFormat;
	var $artLinkFormat;
	var $catNameFormat;
	var $artNameFormat;
	var $categories;
	var $articles;

	/**
	* Constructor. Autostarts the build process
	*/
	function categoryTree()
	{
		$this->catLinkFormat = 'index.php?catid={id}';
		$this->artLinkFormat = 'view.php?do=view&articleid={id}';

		$this->catNameFormat = '{name} ({totalarticles})';
		$this->artNameFormat = '{title}';

		$this->_getData();
		$this->tree = &new HTML_TreeMenu('fooLayer', 'treeMenu/images/');
		$this->_buildTree($this->_getCategories(0), $this->tree);
	}
	
	/**
	* Prints the menu
	*/
	function printMenu()
	{
		$this->tree->printMenu();
	}
	
	/**
	* Builds the menu
	*/
	function _buildTree($categories, &$treenode)
	{
		for ($i=0; $i<count($categories); $i++) {
			$newnode = &$treenode->addItem(new HTML_TreeNode($this->_parseLinkFormat($this->catNameFormat, $categories[$i]), $this->_parseLinkFormat($this->catLinkFormat, $categories[$i]), 'folder.gif'));
			
			// Handle subcategories
			$subcats = $this->_getCategories($categories[$i]['id']);
			if (!empty($subcats)) {
				$this->_buildTree($subcats, $newnode);
			}
			
			// Handle articles
			$articles = $this->_getArticles($categories[$i]['id']);
			if (!empty($articles)) {
				foreach ($articles as $article) {
					$newnode->addItem(new HTML_TreeNode($this->_parseLinkFormat($this->artNameFormat, $article), $this->_parseLinkFormat($this->artLinkFormat, $article), 'article.gif'));
				}
			}
		}
	}

	/**
	* Gets categories using the given parent id
	*/		
	function _getCategories($id)
	{
		$return = array();

		if (is_array($this->categories)) {
			foreach ($this->categories as $key => $value) {
				if ($value['parent'] == $id) {
					$return[] = $value;
				}
			}
		}
		
		return $return;
	}

	/**
	* Gets articles using the given category id
	*/		
	function _getArticles($category)
	{
		return !empty($this->articles[$category]) ? $this->articles[$category] : array();
	}

	/**
	* Parses the data from the db
	*/
	function _getData()
	{
		$GLOBALS['db']->query('SELECT * FROM faq_cats ORDER BY parent, show_order, id');
		while ($row = $GLOBALS['db']->row_array()) {
			$row['name'] = addslashes($row['name']);
			$this->categories[] = $row;
		}

		$GLOBALS['db']->query('SELECT id, title, category FROM faq_articles ORDER BY category, show_order, id');
		while ($row = $GLOBALS['db']->row_array()) {
			$row['title'] = addslashes($row['title']);
			$this->articles[$row['category']][] = $row;
		}
	}

	/**
	* Parses a link (though not only used for links)
	*/		
	function _parseLinkFormat($format, $data)
	{
		return preg_replace('/{(.+)}/Ue', "@\$data['\\1'];", $format);
	}
}
?>