class.TreeViewOutputStrategy.php

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<?php
/**
 * wCMF - wemove Content Management Framework
 * Copyright (C) 2005-2014 wemove digital solutions GmbH
 *
 * Licensed under the terms of any of the following licenses 
 * at your choice:
 *
 * - GNU Lesser General Public License (LGPL)
 *   http://www.gnu.org/licenses/lgpl.html
 * - Eclipse Public License (EPL)
 *   http://www.eclipse.org/org/documents/epl-v10.php
 *
 * See the license.txt file distributed with this work for 
 * additional information.
 *
 * $Id: class.TreeViewOutputStrategy.php 1462 2014-02-04 23:52:27Z iherwig $
 */
require_once(BASE."wcmf/lib/output/class.OutputStrategy.php");
/**
 * @class TreeViewOutputStrategy
 * @ingroup Output
 * @brief This OutputStrategy outputs the object's content in a DHTML Treeview
 *
 * @note This OutputStrategy expects the images 'treeview_leaf.gif', 'treeview_minus.gif', 'treeview_plus.gif'
 *       in the directory 'images'
 * @author      ingo herwig <ingo@wemove.com>
 */
class TreeViewOutputStrategy extends OutputStrategy
{
  var $_leafOpenTag = '<table border="0"><tr><td width="10"></td><td><img src="images/treeview_leaf.gif" alt="tree leaf" /><a href="javascript:if (nodeClicked) nodeClicked(\'RPL_NODEOID\')"><span> RPL_NODETYPE</span></a><div>';
  var $_leafCloseTag = '</div></td></tr></table>';
  var $_nodeOpenTag = '<table border="0"><tr><td width="10"></td><td><a onclick="javascript:toggle(this)" name="toggleButton"><img src="images/treeview_minus.gif" alt="folder closed" /></a><a href="javascript:if (nodeClicked) nodeClicked(\'RPL_NODEOID\')"><span> RPL_NODETYPE</span></a><div>';
  var $_nodeCloseTag = '</div></td></tr></table>';
  
  var $_indent = '';
  var $_linebreak = "\n";
  var $_tagsToClose = null;
  var $_lastIndent = -1;
  
  var $_output = '';
  
  /**
   * Constructor.
   * @param indent The number of spaces to indent.
   * @param linebreak The linebreak char to use.
   */
  function TreeViewOutputStrategy($indent=2, $linebreak="\n")
  {
    $this->_indent = str_repeat(' ', $indent);
    $this->_linebreak = $linebreak;
    $this->_tagsToClose = array();
  }
  /**
   * Write the treeview header.
   */
  function writeHeader()
  {
    $this->write('<table border="0"><tr><td>'.$this->_linebreak);
  }
  /**
   * Write the treeview footer.
   */
  function writeFooter()
  { 
    // print remaining open tags
    $text = '';
    for ($i=0;$i<sizeOf($this->_tagsToClose);$i++)
    {
      $closeTag = $this->_tagsToClose[$i];
      $text .= str_repeat($this->_indent, $closeTag["indent"]).$closeTag["name"].$this->_linebreak;
    }
    $text .= '</tr></td></table>'.$this->_linebreak;
    $this->write($text);
  }
  /**
   * Write the object's content.
   * @param obj The object to write.
   */
  function writeObject(&$obj)
  {
    $text = '';
    $numChildren = $obj->getNumChildren();

    $curIndent = $obj->getDepth();
    if ($curIndent < $this->_lastIndent)
    {
      // write last opened and not closed tags
      for ($i=$this->_lastIndent-$curIndent;$i>0;$i--)
      {
        $closeTag = array_shift($this->_tagsToClose);
        $text .= str_repeat($this->_indent, $closeTag["indent"]).$closeTag["name"].$this->_linebreak;
      }
    }
    // write object's content
    // make replacement variables for htmltags
    $title = $obj->getValue('title');
    if ($title)
      $title = ": ".$title." ";
    else
      $title = " ";
    $replace = $obj->getType().$title;
    
    if ($numChildren == 0) 
    {
      $openTag = $this->_leafOpenTag;
      $openTag = ereg_replace("RPL_NODETYPE",$replace,$openTag);
      $openTag = ereg_replace("RPL_NODEOID",$obj->getOID(),$openTag);

      $text .= str_repeat($this->_indent, $curIndent).$openTag.$this->_linebreak;
      $text .= str_repeat($this->_indent, $curIndent).$this->_leafCloseTag.$this->_linebreak;
    }
    else
    {
      $openTag = $this->_nodeOpenTag;
      $openTag = ereg_replace("RPL_NODETYPE",$replace,$openTag);
      $openTag = ereg_replace("RPL_NODEOID",$obj->getOID(),$openTag);

      $text .= str_repeat($this->_indent, $curIndent).$openTag.$this->_linebreak;
      $closeTag = array("name" => $this->_nodeCloseTag, "indent" => $curIndent);
      array_unshift($this->_tagsToClose, $closeTag);
    }
    // remember current indent
    $this->_lastIndent = $curIndent;
    $this->write($text);
  }
  /*
   * Get the result.
   */
  function getResult()
  {
    return $this->_output;
  }
  /*
   * Append text to internal variable.
   */
  function write($text)
  {
    $this->_output .= $text;
  }
}
?>