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  * https://github.com/mrclay/minify/blob/master/min/lib/Minify/HTML.php
  71  *
  72  * A test suite is available.
  73  *
  74  * @package Minify
  75  * @author Stephen Clay <steve@mrclay.org>
  76  */
  77 class Minify_HTML {
  78     /**
  79      * @var boolean
  80      */
  81     protected $_jsCleanComments = true;
  82
  83     /**
  84      * "Minify" an HTML page
  85      *
  86      * @param string $html
  87      *
  88      * @param array $options
  89      *
  90      * 'cssMinifier' : (optional) callback function to process content of STYLE
  91      * elements.
  92      *
  93      * 'jsMinifier' : (optional) callback function to process content of SCRIPT
  94      * elements. Note: the type attribute is ignored.
  95      *
  96      * 'xhtml' : (optional boolean) should content be treated as XHTML1.0? If
  97      * unset, minify will sniff for an XHTML doctype.
  98      *
  99      * @return string
 100      */
 101     public static function minify($html, $options = array()) {
 102         $min = new self($html, $options);
 103         return $min->process();
 104     }
 105
 106
 107     /**
 108      * Create a minifier object
 109      *
 110      * @param string $html
 111      *
 112      * @param array $options
 113      *
 114      * 'cssMinifier' : (optional) callback function to process content of STYLE
 115      * elements.
 116      *
 117      * 'jsMinifier' : (optional) callback function to process content of SCRIPT
 118      * elements. Note: the type attribute is ignored.
 119      *
 120      * 'jsCleanComments' : (optional) whether to remove HTML comments beginning and end of script block
 121      *
 122      * 'xhtml' : (optional boolean) should content be treated as XHTML1.0? If
 123      * unset, minify will sniff for an XHTML doctype.
 124      *
 125      * @return null
 126      */
 127     public function __construct($html, $options = array())
 128     {
 129         $this->_html = str_replace("\r\n", "\n", trim($html));
 130         if (isset($options['xhtml'])) {
 131             $this->_isXhtml = (bool)$options['xhtml'];
 132         }
 133         if (isset($options['cssMinifier'])) {
 134             $this->_cssMinifier = $options['cssMinifier'];
 135         }
 136         if (isset($options['jsMinifier'])) {
 137             $this->_jsMinifier = $options['jsMinifier'];
 138         }
 139         if (isset($options['jsCleanComments'])) {
 140             $this->_jsCleanComments = (bool)$options['jsCleanComments'];
 141         }
 142     }
 143
 144
 145     /**
 146      * Minify the markeup given in the constructor
 147      *
 148      * @return string
 149      */
 150     public function process()
 151     {
 152         if ($this->_isXhtml === null) {
 153             $this->_isXhtml = (false !== strpos($this->_html, '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML'));
 154         }
 155
 156         $this->_replacementHash = 'MINIFYHTML' . md5($_SERVER['REQUEST_TIME']);
 157         $this->_placeholders = array();
 158
 159         // replace SCRIPTs (and minify) with placeholders
 160         $this->_html = preg_replace_callback(
 161             '/(\\s*)<script(\\b[^>]*?>)([\\s\\S]*?)<\\/script>(\\s*)/i'
 162             ,array($this, '_removeScriptCB')
 163             ,$this->_html);
 164
 165         // replace STYLEs (and minify) with placeholders
 166         $this->_html = preg_replace_callback(
 167             '/\\s*<style(\\b[^>]*>)([\\s\\S]*?)<\\/style>\\s*/i'
 168             ,array($this, '_removeStyleCB')
 169             ,$this->_html);
 170
 171         // remove HTML comments (not containing IE conditional comments).
 172         $this->_html = preg_replace_callback(
 173             '/<!--([\\s\\S]*?)-->/'
 174             ,array($this, '_commentCB')
 175             ,$this->_html);
 176
 177         // replace PREs with placeholders
 178         $this->_html = preg_replace_callback('/\\s*<pre(\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/i'
 179             ,array($this, '_removePreCB')
 180             ,$this->_html);
 181
 182         // replace TEXTAREAs with placeholders
 183         $this->_html = preg_replace_callback(
 184             '/\\s*<textarea(\\b[^>]*?>[\\s\\S]*?<\\/textarea>)\\s*/i'
 185             ,array($this, '_removeTextareaCB')
 186             ,$this->_html);
 187
 188         // replace INPUTs with placeholders
 189         $this->_html = preg_replace_callback(
 190             '/\\s*<input(\\b[^>]*?>)\\s*/i'
 191             ,array($this, '_removeInputCB')
 192             ,$this->_html);
 193
 194         // trim each line.
 195         // @todo take into account attribute values that span multiple lines.
 196               // 2 regexp because merging un /^\\s+|\\s+$/m also del a lot of newline chars ???
 197         $this->_html = preg_replace('/\\s+$/m', '', $this->_html);
 198         $this->_html = preg_replace('/^\\s+/m', '', $this->_html);
 199
 200         // remove ws around block/undisplayed elements
 201         $this->_html = preg_replace('/\\s+(<\\/?(?:area|base(?:font)?|blockquote|body'
 202             .'|caption|center|cite|col(?:group)?|dd|dir|div|dl|dt|fieldset|form'
 203             .'|frame(?:set)?|h[1-6]|head|hr|html|legend|li|link|map|menu|meta'
 204             .'|ol|opt(?:group|ion)|p|param|t(?:able|body|head|d|h||r|foot|itle)'
 205             .'|ul)\\b[^>]*>)/i', '$1', $this->_html);
 206
 207         // remove ws outside of all elements
 208         $this->_html = preg_replace(
 209             '/>(\\s(?:\\s*))?([^<]+)(\\s(?:\s*))?</'
 210             ,'>$1$2$3<'
 211             ,$this->_html);
 212
 213         // use newlines before 1st attribute in open tags (to limit line lengths)
 214         $this->_html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "$1\n$2", $this->_html);
 215
 216         // fill placeholders
 217         $this->_html = str_replace(
 218             array_keys($this->_placeholders)
 219             ,array_values($this->_placeholders)
 220             ,$this->_html
 221         );
 222         // issue 229: multi-pass to catch scripts that didn't get replaced in textareas
 223         $this->_html = str_replace(
 224             array_keys($this->_placeholders)
 225             ,array_values($this->_placeholders)
 226             ,$this->_html
 227         );
 228         return $this->_html;
 229     }
 230
 231     protected function _commentCB($m)
 232     {
 233         return (0 === strpos($m[1], '[') || false !== strpos($m[1], '<!['))
 234             ? $m[0]
 235             : '';
 236     }
 237
 238     protected function _reservePlace($content)
 239     {
 240         $placeholder = '%' . $this->_replacementHash . count($this->_placeholders) . '%';
 241         $this->_placeholders[$placeholder] = $content;
 242         return $placeholder;
 243     }
 244
 245     protected $_isXhtml = null;
 246     protected $_replacementHash = null;
 247     protected $_placeholders = array();
 248     protected $_cssMinifier = null;
 249     protected $_jsMinifier = null;
 250
 251     protected function _removePreCB($m)
 252     {
 253         return $this->_reservePlace("<pre{$m[1]}");
 254     }
 255
 256                 protected function _removeInputCB($m)
 257                 {
 258              return $this->_reservePlace("<input{$m[1]}");
 259                 }
 260
 261     protected function _removeTextareaCB($m)
 262     {
 263         return $this->_reservePlace("<textarea{$m[1]}");
 264     }
 265
 266     protected function _removeStyleCB($m)
 267     {
 268         $openStyle = "<style{$m[1]}";
 269         $css = $m[2];
 270         // remove HTML comments
 271         $css = preg_replace('/(?:^\\s*<!--|-->\\s*$)/', '', $css);
 272
 273         // remove CDATA section markers
 274         $css = $this->_removeCdata($css);
 275
 276         // minify
 277         $minifier = $this->_cssMinifier
 278             ? $this->_cssMinifier
 279             : 'trim';
 280         $css = call_user_func($minifier, $css);
 281
 282         return $this->_reservePlace($this->_needsCdata($css)
 283             ? "{$openStyle}/*<![CDATA[*/{$css}/*]]>*/</style>"
 284             : "{$openStyle}{$css}</style>"
 285         );
 286     }
 287
 288     protected function _removeScriptCB($m)
 289     {
 290         $openScript = "<script{$m[2]}";
 291         $js = $m[3];
 292
 293         // whitespace surrounding? preserve at least one space
 294         $ws1 = ($m[1] === '') ? '' : ' ';
 295         $ws2 = ($m[4] === '') ? '' : ' ';
 296
 297         // remove HTML comments (and ending "//" if present)
 298         if ($this->_jsCleanComments) {
 299             $js = preg_replace('/(?:^\\s*<!--\\s*|\\s*(?:\\/\\/)?\\s*-->\\s*$)/', '', $js);
 300         }
 301
 302         // remove CDATA section markers
 303         $js = $this->_removeCdata($js);
 304
 305         // minify
 306         $minifier = $this->_jsMinifier
 307             ? $this->_jsMinifier
 308             : 'trim';
 309         $js = call_user_func($minifier, $js);
 310
 311         return $this->_reservePlace($this->_needsCdata($js)
 312             ? "{$ws1}{$openScript}/*<![CDATA[*/{$js}/*]]>*/</script>{$ws2}"
 313             : "{$ws1}{$openScript}{$js}</script>{$ws2}"
 314         );
 315     }
 316
 317     protected function _removeCdata($str)
 318     {
 319         return (false !== strpos($str, '<![CDATA['))
 320             ? str_replace(array('<![CDATA[', ']]>'), '', $str)
 321             : $str;
 322     }
 323
 324     protected function _needsCdata($str)
 325     {
 326         return ($this->_isXhtml && preg_match('/(?:[<&]|\\-\\-|\\]\\]>)/', $str));
 327     }
 328 }