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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\CodeReview\UI; |
| 4 | |
| 5 | use Html; |
| 6 | |
| 7 | /** |
| 8 | * wordCloud Copyright 2007 Derek Harvey |
| 9 | * www.lotsofcode.com |
| 10 | * |
| 11 | * This file is part of wordCloud. |
| 12 | * |
| 13 | * wordCloud is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * wordCloud is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with wordCloud; if not, write to the Free Software |
| 25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 26 | * |
| 27 | * --- |
| 28 | * Adapted for use with MediaWiki, cleaned up coding style, etc on 2010-11-03 |
| 29 | */ |
| 30 | class WordCloud { |
| 31 | /** |
| 32 | * Nice big array of words and their weights |
| 33 | * @var array |
| 34 | */ |
| 35 | private $wordsArray = []; |
| 36 | |
| 37 | /** |
| 38 | * An optional callback to format the text before outputting |
| 39 | * @var callback |
| 40 | */ |
| 41 | private $callback; |
| 42 | |
| 43 | /** |
| 44 | * Mapping of percentage limits to their CSS classes |
| 45 | * @var array |
| 46 | */ |
| 47 | private $classPercentages = [ |
| 48 | 1 => 99, 2 => 70, 3 => 60, |
| 49 | 4 => 50, 5 => 40, 6 => 30, |
| 50 | 7 => 20, 8 => 10, 9 => 5 |
| 51 | ]; |
| 52 | |
| 53 | /** |
| 54 | * Constructor |
| 55 | * |
| 56 | * @param array $words Array of word => rank pairs |
| 57 | * @param Callback|null $callback |
| 58 | */ |
| 59 | public function __construct( array $words = [], $callback = null ) { |
| 60 | foreach ( $words as $word => $rank ) { |
| 61 | $this->addWord( $word, $rank ); |
| 62 | } |
| 63 | $this->callback = $callback ?: [ $this, 'defaultTextCallback' ]; |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Assign word to array |
| 68 | * |
| 69 | * @param string $word The word to add |
| 70 | * @param int $value The weight to give it |
| 71 | */ |
| 72 | public function addWord( $word, $value = 1 ) { |
| 73 | $word = strtolower( $word ); |
| 74 | if ( array_key_exists( $word, $this->wordsArray ) ) { |
| 75 | $this->wordsArray[$word] += $value; |
| 76 | } else { |
| 77 | $this->wordsArray[$word] = $value; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Calculate size of words array |
| 83 | * |
| 84 | * @return int |
| 85 | */ |
| 86 | public function getCloudSize() { |
| 87 | return array_sum( $this->wordsArray ); |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Create the HTML code for each word and apply font size. |
| 92 | * |
| 93 | * @return string |
| 94 | */ |
| 95 | public function getCloudHtml() { |
| 96 | global $wgCodeReviewShuffleTagCloud; |
| 97 | if ( count( $this->wordsArray ) === 0 ) { |
| 98 | return ''; |
| 99 | } |
| 100 | |
| 101 | if ( $wgCodeReviewShuffleTagCloud ) { |
| 102 | $this->shuffleCloud(); |
| 103 | } else { |
| 104 | ksort( $this->wordsArray ); |
| 105 | } |
| 106 | |
| 107 | $max = max( $this->wordsArray ); |
| 108 | if ( is_array( $this->wordsArray ) ) { |
| 109 | $return = ''; |
| 110 | foreach ( $this->wordsArray as $word => $popularity ) { |
| 111 | $sizeRange = $this->getClassFromPercent( ( $popularity / $max ) * 100 ); |
| 112 | $return .= call_user_func_array( $this->callback, [ $word, $sizeRange ] ); |
| 113 | } |
| 114 | return '<div class="mw-wordcloud">' . $return . '</div>'; |
| 115 | } |
| 116 | return ''; |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * Default text callback for word display |
| 121 | * |
| 122 | * @param string $word |
| 123 | * @param string $sizeRange |
| 124 | * @return string |
| 125 | */ |
| 126 | public function defaultTextCallback( $word, $sizeRange ) { |
| 127 | return Html::element( 'span', [ |
| 128 | 'class' => 'mw-wordcloud-size-' . $sizeRange ], $word ); |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Shuffle associated names in array |
| 133 | */ |
| 134 | private function shuffleCloud() { |
| 135 | $keys = array_keys( $this->wordsArray ); |
| 136 | |
| 137 | shuffle( $keys ); |
| 138 | |
| 139 | if ( count( $keys ) ) { |
| 140 | $tmpArray = $this->wordsArray; |
| 141 | $this->wordsArray = []; |
| 142 | foreach ( $keys as $value ) { |
| 143 | $this->wordsArray[$value] = $tmpArray[$value]; |
| 144 | } |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Get the class range using a percentage |
| 150 | * |
| 151 | * @param int $percent |
| 152 | * @return int |
| 153 | */ |
| 154 | private function getClassFromPercent( $percent ) { |
| 155 | foreach ( $this->classPercentages as $class => $limit ) { |
| 156 | if ( $percent >= $limit ) { |
| 157 | return $class; |
| 158 | } |
| 159 | } |
| 160 | return max( array_keys( $this->classPercentages ) ) + 1; |
| 161 | } |
| 162 | } |