includes/tagcloud.php
author Dan
Wed, 09 Jul 2008 17:38:08 -0400
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Sprited icons for admin panel applets
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<?php
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/*
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 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
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 * Version 1.1.4 (Caoineag alpha 4)
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 * Copyright (C) 2006-2008 Dan Fuhry
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 *
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 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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 */
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/**
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 * Class for formatting and displaying tag clouds. Loosely based the reference cloud engine from <http://www.lotsofcode.com/php/tutorials/tag-cloud>.
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 * @package Enano
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 * @subpackage Presentation/UI
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 * @copyright (C) 2007 Dan Fuhry
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 * @license GNU General Public License, version 2 or at your option any later versionc
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 */
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class TagCloud
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{
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  /**
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   * The list of words in the cloud.
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   * @var array
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   */
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  var $words = array();
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  /**
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   * Constructor.
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   * @param array Optional. An initial list of words, just a plain old array.
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   */
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  function __construct($words = array())
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  {
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    if ( count($words) > 0 )
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    {
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      foreach ( $words as $word )
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        $this->add_word($word);
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    }
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  }
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  /**
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   * Adds a word into the word list.
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   * @param string The word to add
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   */
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  function add_word($word)
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  {
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    $word = sanitize_tag($word);
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    if ( isset($this->words[$word]) )
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      $this->words[$word] += 1;
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    else
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      $this->words[$word] = 1;
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  }
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  /**
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   * Returns the total size of the cloud.
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   * @return int
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   */
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  function get_cloud_size()
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  {
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    return array_sum($this->words);
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  }
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  /**
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   * Shuffles the cloud.
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   */
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  function shuffle_cloud()
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  {
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    $keys = array_keys($this->words);
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    if ( !$keys || empty($keys) || !is_array($keys) )
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      return null;
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    shuffle($keys);
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    if ( !$keys || empty($keys) || !is_array($keys) )
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      return null;
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    $temp = $this->words;
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    $this->words = array();
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    foreach ( $keys as $word )
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    {
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      $this->words[$word] = $temp[$word];
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    }
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    unset($temp);
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  }
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  /**
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   * Returns the popularity index (scale class) for a 1-100 number.
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   * @param int
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   * @return int
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   */
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  function get_scale_class($val)
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  {
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    $ret = 0;
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    if ( $val >= 99 )
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      $ret = 1;
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    else if ( $val >= 70 )
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      $ret = 2;
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    else if ( $val >= 60 )
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      $ret = 3;
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    else if ( $val >= 50 )
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      $ret = 4;
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    else if ( $val >= 40 )
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      $ret = 5;
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    else if ( $val >= 30 )
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      $ret = 6;
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    else if ( $val >= 20 )
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      $ret = 7;
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    else if ( $val >= 10 )
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      $ret = 8;
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    else if ( $val >= 5 )
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      $ret = 9;
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    return $ret;
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  }
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  /**
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   * Generates and returns HTML for the cloud.
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   * @param string Optional. The CSS class applied to all <span> tags. Can be "normal" or "small". Defaults to "normal".
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   * @param string Optional. The alignment for the div. Defaults to "center".
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   * @return string
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   */
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  function make_html($span_class = 'normal', $div_align = 'center')
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  {
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    global $lang;
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    $html = array();
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    $max  = max($this->words);
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    $size = $this->get_cloud_size();
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    $inc = 0;
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    if ( count($this->words) > 0 )
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    {
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      foreach ( $this->words as $word => $popularity )
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      {
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        $inc++;
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        $word = htmlspecialchars($word);
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        $percent = ( $popularity / $max ) * 100;
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        $index = $this->get_scale_class($percent);
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        $newline = ( $inc == 5 ) ? "<br />" : '';
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        ( $inc == 5 ) ? $inc = 0 : null;
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        $url = makeUrlNS('Special', 'TagCloud/' . htmlspecialchars($word));
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        $popstring = ( $popularity == 1 ) ? $lang->get('pagetools_tagcloug_tip_popularity_one') : $lang->get('pagetools_tagcloug_tip_popularity_plural', array('popularity' => $popularity));
85f91037cd4f Localization is FINISHED, DAMN IT HELLAH YEAH! OVER WITH! Man, it feels to get that off my chest. Release is in under 48 hours, folks. And we're ready for it.
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        $html[] = "<span class='tc_word_{$span_class} tc_{$span_class}_index_{$index}'><a href='$url' title='$popstring'>$word</a></span>"; // $newline";
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      }
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    }
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    $html = '<div style="text-align: ' . $div_align . '; margin: 0 auto; max-width: 400px;">' . implode("\n", $html) . '</div>';
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    return $html;
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  }
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}
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?>