+
−<?php
+
−
+
−/*
+
− * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
+
− * Version 1.0.1 (Loch Ness)
+
− * Copyright (C) 2006-2007 Dan Fuhry
+
− *
+
− * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
+
− * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
+
− *
+
− * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+
− * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
+
− */
+
−
+
−/**
+
− * Class for formatting and displaying tag clouds. Loosely based the reference cloud engine from <http://www.lotsofcode.com/php/tutorials/tag-cloud>.
+
− * @package Enano
+
− * @subpackage Presentation/UI
+
− * @copyright (C) 2007 Dan Fuhry
+
− * @license GNU General Public License, version 2 or at your option any later versionc
+
− */
+
−
+
−class TagCloud
+
−{
+
−  
+
−  /**
+
−   * The list of words in the cloud.
+
−   * @var array
+
−   */
+
−  
+
−  var $words = array();
+
−  
+
−  /**
+
−   * Constructor.
+
−   * @param array Optional. An initial list of words, just a plain old array.
+
−   */
+
−  
+
−  function __construct($words)
+
−  {
+
−    if ( count($words) > 0 )
+
−    {
+
−      foreach ( $words as $word )
+
−        $this->add_word($word);
+
−    }
+
−  }
+
−  
+
−  /**
+
−   * Adds a word into the word list.
+
−   * @param string The word to add
+
−   */
+
−  
+
−  function add_word($word)
+
−  {
+
−    $word = strtolower($word);
+
−    
+
−    if ( isset($this->words[$word]) )
+
−      $this->words[$word] += 1;
+
−    else
+
−      $this->words[$word] = 1;
+
−  }
+
−  
+
−  /**
+
−   * Returns the total size of the cloud.
+
−   * @return int
+
−   */
+
−  
+
−  function get_cloud_size()
+
−  {
+
−    return array_sum($this->words);
+
−  }
+
−  
+
−  /**
+
−   * Shuffles the cloud.
+
−   */
+
−  
+
−  function shuffle_cloud()
+
−  {
+
−    $keys = array_keys($this->words);
+
−    if ( !$keys || empty($keys) || !is_array($keys) )
+
−      return null;
+
−    
+
−    shuffle($keys);
+
−    if ( !$keys || empty($keys) || !is_array($keys) )
+
−      return null;
+
−    
+
−    $temp = $this->words;
+
−    $this->words = array();
+
−    foreach ( $keys as $word )
+
−    {
+
−      $this->words[$word] = $temp[$word];
+
−    }
+
−    
+
−    unset($temp);
+
−  }
+
−  
+
−  /**
+
−   * Returns the popularity index (scale class) for a 1-100 number.
+
−   * @param int
+
−   * @return int
+
−   */
+
−  
+
−  function get_scale_class($val)
+
−  {
+
−    $ret = 0;
+
−    if ( $val >= 99 )
+
−      $ret = 1;
+
−    else if ( $val >= 70 )
+
−      $ret = 2;
+
−    else if ( $val >= 60 )
+
−      $ret = 3;
+
−    else if ( $val >= 50 )
+
−      $ret = 4;
+
−    else if ( $val >= 40 )
+
−      $ret = 5;
+
−    else if ( $val >= 30 )
+
−      $ret = 6;
+
−    else if ( $val >= 20 )
+
−      $ret = 7;
+
−    else if ( $val >= 10 )
+
−      $ret = 8;
+
−    else if ( $val >= 5 )
+
−      $ret = 9;
+
−    return $ret;
+
−  }
+
−  
+
−  /**
+
−   * Generates and returns HTML for the cloud.
+
−   * @return string
+
−   */
+
−   
+
−  function make_html()
+
−  {
+
−    $html = array();
+
−    $max  = max($this->words);
+
−    $size = $this->get_cloud_size();
+
−    if ( count($this->words) > 0 )
+
−    {
+
−      foreach ( $this->words as $word => $popularity )
+
−      {
+
−        $word = htmlspecialchars($word);
+
−        $percent = ( $popularity / $max ) * 100;
+
−        $index = $this->get_scale_class($percent);
+
−        $html[] = "<span class='tc_word tc_index_$index'>$word</span>";
+
−      }
+
−    }
+
−    $html = implode("\n", $html);
+
−    return $html;
+
−  }
+
−   
+
−  
+
−}
+
−
+
−?>