www/plugins-dist/compresseur/lib/minify_html/class.minify_html.php

   1 <?php
   2
   3 /**
   4  * Class Minify_HTML
   5  * @package Minify
   6  */
   7
   8
   9 /**
  10  * Surcharge du minifieur HTML
  11  *
  12  * Surcharge pour ne pas manger les commentaires <!--extra-->
  13  * qui servent parfois aux plugins, et parfois même après
  14  * le passage du compacteur HTML
  15  *
  16  * C'était le cas du bouton statistiques du formulaire admin par exemple
  17  *
  18  * On permet de conserver également tout commentaire commençant par <!--keepme: -->
  19  *
  20  * @package SPIP\Compresseur\Minifieur
  21 **/
  22 class Minify_HTML_SPIP extends Minify_HTML {
  23
  24     /**
  25      * {@inheritdoc}
  26      *
  27      *
  28      * @param string $html
  29      *     HTML à minifier
  30      * @param array $options
  31      *     Tableau d'option avec les index possibles
  32      *     - 'cssMinifier' : (optional) callback function to process content of STYLE
  33      *        elements.
  34      *     - 'jsMinifier' : (optional) callback function to process content of SCRIPT
  35      *        elements. Note: the type attribute is ignored.
  36      *     - 'xhtml' : (optional boolean) should content be treated as XHTML1.0? If
  37      *        unset, minify will sniff for an XHTML doctype.
  38      * @return string
  39      *     HTML minifié
  40     **/
  41     public static function minify($html, $options = array()) {
  42         $min = new Minify_HTML_SPIP($html, $options);
  43         return $min->process();
  44     }
  45
  46     /**
  47      * Minification des commentaires
  48      *
  49      * Le cas <!--extra--> doit être conservé dans les commentaires,
  50      * tout comme <!--keepme: xxx -->
  51      *
  52      * @param array $m    Matches du preg_match d'un commentaire HTML
  53      * @return string     Contenu minifié
  54      */
  55     protected function _commentCB($m)
  56     {
  57         if ($m[1] === 'extra') return $m[0];
  58         if ($m[1] AND $m[1][0] === 'k' AND substr($m[1],0,7) === 'keepme:') return $m[0];
  59         return parent::_commentCB($m);
  60     }
  61 }
  62
  63
  64 /**
  65  * Compress HTML
  66  *
  67  * This is a heavy regex-based removal of whitespace, unnecessary comments and
  68  * tokens. IE conditional comments are preserved. There are also options to have
  69  * STYLE and SCRIPT blocks compressed by callback functions.
  70  *
  71  * A test suite is available.
  72  * http://code.google.com/p/minify/source/browse/trunk/min/lib/Minify/HTML.php
  73  *
  74  * @package Minify
  75  * @author Stephen Clay <steve@mrclay.org>
  76  */
  77 class Minify_HTML {
  78
  79     /**
  80      * "Minify" an HTML page
  81      *
  82      * @param string $html
  83      *
  84      * @param array $options
  85      *
  86      * 'cssMinifier' : (optional) callback function to process content of STYLE
  87      * elements.
  88      *
  89      * 'jsMinifier' : (optional) callback function to process content of SCRIPT
  90      * elements. Note: the type attribute is ignored.
  91      *
  92      * 'xhtml' : (optional boolean) should content be treated as XHTML1.0? If
  93      * unset, minify will sniff for an XHTML doctype.
  94      *
  95      * @return string
  96      */
  97     public static function minify($html, $options = array()) {
  98         $min = new Minify_HTML($html, $options);
  99         return $min->process();
 100     }
 101
 102
 103     /**
 104      * Create a minifier object
 105      *
 106      * @param string $html
 107      *
 108      * @param array $options
 109      *
 110      * 'cssMinifier' : (optional) callback function to process content of STYLE
 111      * elements.
 112      *
 113      * 'jsMinifier' : (optional) callback function to process content of SCRIPT
 114      * elements. Note: the type attribute is ignored.
 115      *
 116      * 'xhtml' : (optional boolean) should content be treated as XHTML1.0? If
 117      * unset, minify will sniff for an XHTML doctype.
 118      *
 119      * @return null
 120      */
 121     public function __construct($html, $options = array())
 122     {
 123         $this->_html = str_replace("\r\n", "\n", trim($html));
 124         if (isset($options['xhtml'])) {
 125             $this->_isXhtml = (bool)$options['xhtml'];
 126         }
 127         if (isset($options['cssMinifier'])) {
 128             $this->_cssMinifier = $options['cssMinifier'];
 129         }
 130         if (isset($options['jsMinifier'])) {
 131             $this->_jsMinifier = $options['jsMinifier'];
 132         }
 133     }
 134
 135
 136     /**
 137      * Minify the markeup given in the constructor
 138      *
 139      * @return string
 140      */
 141     public function process()
 142     {
 143         if ($this->_isXhtml === null) {
 144             $this->_isXhtml = (false !== strpos($this->_html, '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML'));
 145         }
 146
 147         $this->_replacementHash = 'MINIFYHTML' . md5($_SERVER['REQUEST_TIME']);
 148         $this->_placeholders = array();
 149
 150         // replace SCRIPTs (and minify) with placeholders
 151         $this->_html = preg_replace_callback(
 152             '/(\\s*)(<script\\b[^>]*?>)([\\s\\S]*?)<\\/script>(\\s*)/i'
 153             ,array($this, '_removeScriptCB')
 154             ,$this->_html);
 155
 156         // replace STYLEs (and minify) with placeholders
 157         $this->_html = preg_replace_callback(
 158             '/\\s*(<style\\b[^>]*?>)([\\s\\S]*?)<\\/style>\\s*/i'
 159             ,array($this, '_removeStyleCB')
 160             ,$this->_html);
 161
 162         // remove HTML comments (not containing IE conditional comments).
 163         $this->_html = preg_replace_callback(
 164             '/<!--([\\s\\S]*?)-->/'
 165             ,array($this, '_commentCB')
 166             ,$this->_html);
 167
 168         // replace PREs with placeholders
 169         $this->_html = preg_replace_callback('/\\s*(<pre\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/i'
 170             ,array($this, '_removePreCB')
 171             ,$this->_html);
 172
 173         // replace TEXTAREAs with placeholders
 174         $this->_html = preg_replace_callback(
 175             '/\\s*(<textarea\\b[^>]*?>[\\s\\S]*?<\\/textarea>)\\s*/i'
 176             ,array($this, '_removeTextareaCB')
 177             ,$this->_html);
 178
 179         // trim each line.
 180         // @todo take into account attribute values that span multiple lines.
 181               // 2 regexp because merging un /^\\s+|\\s+$/m also del a lot of newline chars ???
 182         $this->_html = preg_replace('/\\s+$/m', '', $this->_html);
 183         $this->_html = preg_replace('/^\\s+/m', '', $this->_html);
 184
 185         // remove ws around block/undisplayed elements
 186         $this->_html = preg_replace('/\\s+(<\\/?(?:area|base(?:font)?|blockquote|body'
 187             .'|caption|center|cite|col(?:group)?|dd|dir|div|dl|dt|fieldset|form'
 188             .'|frame(?:set)?|h[1-6]|head|hr|html|legend|li|link|map|menu|meta'
 189             .'|ol|opt(?:group|ion)|p|param|t(?:able|body|head|d|h||r|foot|itle)'
 190             .'|ul)\\b[^>]*>)/i', '$1', $this->_html);
 191
 192         // remove ws outside of all elements
 193         $this->_html = preg_replace_callback(
 194             '/>([^<]+)</'
 195             ,array($this, '_outsideTagCB')
 196             ,$this->_html);
 197
 198         // use newlines before 1st attribute in open tags (to limit line lengths)
 199         $this->_html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "$1\n$2", $this->_html);
 200
 201         // fill placeholders
 202         $this->_html = str_replace(
 203             array_keys($this->_placeholders)
 204             ,array_values($this->_placeholders)
 205             ,$this->_html
 206         );
 207         return $this->_html;
 208     }
 209
 210     protected function _commentCB($m)
 211     {
 212         return (0 === strpos($m[1], '[') || false !== strpos($m[1], '<!['))
 213             ? $m[0]
 214             : '';
 215     }
 216
 217     protected function _reservePlace($content)
 218     {
 219         $placeholder = '%' . $this->_replacementHash . count($this->_placeholders) . '%';
 220         $this->_placeholders[$placeholder] = $content;
 221         return $placeholder;
 222     }
 223
 224     protected $_isXhtml = null;
 225     protected $_replacementHash = null;
 226     protected $_placeholders = array();
 227     protected $_cssMinifier = null;
 228     protected $_jsMinifier = null;
 229
 230     protected function _outsideTagCB($m)
 231     {
 232         return '>' . preg_replace('/^\\s+|\\s+$/', ' ', $m[1]) . '<';
 233     }
 234
 235     protected function _removePreCB($m)
 236     {
 237         return $this->_reservePlace($m[1]);
 238     }
 239
 240     protected function _removeTextareaCB($m)
 241     {
 242         return $this->_reservePlace($m[1]);
 243     }
 244
 245     protected function _removeStyleCB($m)
 246     {
 247         $openStyle = $m[1];
 248         $css = $m[2];
 249         // remove HTML comments
 250         $css = preg_replace('/(?:^\\s*<!--|-->\\s*$)/', '', $css);
 251
 252         // remove CDATA section markers
 253         $css = $this->_removeCdata($css);
 254
 255         // minify
 256         $minifier = $this->_cssMinifier
 257             ? $this->_cssMinifier
 258             : 'trim';
 259         $css = call_user_func($minifier, $css);
 260
 261         return $this->_reservePlace($this->_needsCdata($css)
 262             ? "{$openStyle}/*<![CDATA[*/{$css}/*]]>*/</style>"
 263             : "{$openStyle}{$css}</style>"
 264         );
 265     }
 266
 267     protected function _removeScriptCB($m)
 268     {
 269         $openScript = $m[2];
 270         $js = $m[3];
 271
 272         // whitespace surrounding? preserve at least one space
 273         $ws1 = ($m[1] === '') ? '' : ' ';
 274         $ws2 = ($m[4] === '') ? '' : ' ';
 275
 276         // remove HTML comments (and ending "//" if present)
 277         $js = preg_replace('/(?:^\\s*<!--\\s*|\\s*(?:\\/\\/)?\\s*-->\\s*$)/', '', $js);
 278
 279         // remove CDATA section markers
 280         $js = $this->_removeCdata($js);
 281
 282         // minify
 283         $minifier = $this->_jsMinifier
 284             ? $this->_jsMinifier
 285             : 'trim';
 286         $js = call_user_func($minifier, $js);
 287
 288         return $this->_reservePlace($this->_needsCdata($js)
 289             ? "{$ws1}{$openScript}/*<![CDATA[*/{$js}/*]]>*/</script>{$ws2}"
 290             : "{$ws1}{$openScript}{$js}</script>{$ws2}"
 291         );
 292     }
 293
 294     protected function _removeCdata($str)
 295     {
 296         return (false !== strpos($str, '<![CDATA['))
 297             ? str_replace(array('<![CDATA[', ']]>'), '', $str)
 298             : $str;
 299     }
 300
 301     protected function _needsCdata($str)
 302     {
 303         return ($this->_isXhtml && preg_match('/(?:[<&]|\\-\\-|\\]\\]>)/', $str));
 304     }
 305 }