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<?php
/**
* The Horde_Tree_javascript:: class extends the Horde_Tree class to provide
* javascript specific rendering functions.
*
* Copyright 2003-2006 Marko Djukic <marko@oblo.com>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
* $Horde: framework/Tree/Tree/javascript.php,v 1.34.2.9 2006/01/01 21:28:40 jan Exp $
*
* @author Marko Djukic <marko@oblo.com>
* @package Horde_Tree
* @since Horde 3.0
*/
class Horde_Tree_javascript extends Horde_Tree {
/**
* The name of the source for the tree data.
*
* @var string
*/
var $_source_name = null;
/**
* The name of the target element to output the javascript tree.
*
* @var string
*/
var $_options_name = null;
/**
* The name of the target element to output the javascript tree.
*
* @var string
*/
var $_target_name = null;
/**
* Constructor
*/
function Horde_Tree_javascript($tree_name, $params = array())
{
parent::Horde_Tree($tree_name, $params);
if (!isset($GLOBALS['browser'])) {
require_once 'Horde/Browser.php';
$GLOBALS['browser'] = &Browser::singleton();
}
/* Check for a javascript session state. */
if ($this->_usesession &&
isset($_COOKIE[$this->_instance . '_expanded'])) {
/* Remove "exp" prefix from cookie value. */
$nodes = explode(',', substr($_COOKIE[$this->_instance . '_expanded'], 3));
/* Make sure there are no previous nodes stored in the
* session. */
$_SESSION['horde_tree'][$this->_instance]['expanded'] = array();
/* Save nodes to the session. */
foreach ($nodes as $id) {
$_SESSION['horde_tree'][$this->_instance]['expanded'][$id] = true;
}
}
}
/**
* Returns the tree.
*
* @param boolean $static If true the tree nodes can't be expanded and
* collapsed and the tree gets rendered expanded.
*
* @return string The HTML code of the rendered tree.
*/
function getTree($static = false)
{
$this->_static = $static;
$this->_source_name = 'n_' . $this->_instance;
$this->_header_name = 'h_' . $this->_instance;
$this->_options_name = 'o_' . $this->_instance;
$this->_target_name = 't_' . $this->_instance;
$this->_buildIndents($this->_root_nodes);
$tree = $this->_getTreeSource() .
'<div id="' . $this->_target_name . '"></div>' .
$this->_getTreeInit();
Horde::addScriptFile('tree.js', 'horde');
return $tree;
}
/**
* Check the current environment to see if we can render the HTML
* tree. We check for DOM support in the browser.
*
* @static
*
* @return boolean Whether or not this Tree:: backend will function.
*/
function isSupported()
{
return $GLOBALS['browser']->hasFeature('dom');
}
/**
* Returns just the JS node definitions as a string.
*
* @return string The Javascript node array definitions.
*/
function renderNodeDefinitions()
{
$this->_buildIndents($this->_root_nodes);
$nodeJs = '';
foreach ($this->_nodes as $node_id => $node) {
$nodeJs .= $this->_getJsArrayElement(sprintf('%s[\'%s\']', 'n_' . $this->_instance, $node_id), $node);
}
return $nodeJs . $this->_instance . '.renderTree(root_nodes);';
}
/**
* Outputs the data for the tree as a javascript array.
*
* @access private
*/
function _getTreeSource()
{
global $browser;
$js = '<script type="text/javascript">' . "\n";
$js .= 'var extraColsLeft = ' . $this->_extra_cols_left . ";\n";
$js .= 'var extraColsRight = ' . $this->_extra_cols_right . ";\n";
$js .= 'var ' . $this->_source_name . ' = new Array();' . "\n";
foreach ($this->_nodes as $node_id => $node) {
$js .= $this->_getJsArrayElement(sprintf('%s[\'%s\']', $this->_source_name,
$browser->escapeJSCode(addslashes($node_id))), $node);
}
$js .= $this->_getJsArrayElement($this->_header_name, $this->_header);
$js .= $this->_getJsArrayElement($this->_options_name, $this->_options);
$js .= '</script>' . "\n";
return $js;
}
/**
* Outputs the javascript to initialise the tree.
*
* @access private
*/
function _getTreeInit()
{
$js = '<script type="text/javascript">' . "\n";
$js .= sprintf('%1$s = new Horde_Tree(\'%1$s\');' . "\n",
$this->_instance);
$js .= $this->_getJsArrayElement('root_nodes', $this->_root_nodes);
$js .= sprintf("%s.renderTree(root_nodes, %s);\n</script>\n",
$this->_instance,
$this->_static ? 'true' : 'false');
return $js;
}
function _getJsArrayElement($var, $value)
{
if (is_array($value)) {
$js = $var . ' = new Array();' . "\n";
foreach ($value as $key => $val) {
if (is_numeric($key)) {
$newVar = $var . '[' . $key . ']';
} else {
$newVar = $var . '[\'' . $key . '\']';
}
$js .= $this->_getJsArrayElement($newVar, $val);
}
return $js;
} else {
return $var . " = '" . addslashes($value) . "';\n";
}
}
}
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