diff options
Diffstat (limited to 'admin/survey/minify/lib/Minify/HTML.php')
| -rw-r--r-- | admin/survey/minify/lib/Minify/HTML.php | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/admin/survey/minify/lib/Minify/HTML.php b/admin/survey/minify/lib/Minify/HTML.php new file mode 100644 index 0000000..24b14ac --- /dev/null +++ b/admin/survey/minify/lib/Minify/HTML.php @@ -0,0 +1,258 @@ +<?php
+/**
+ * Class Minify_HTML
+ * @package Minify
+ */
+
+/**
+ * Compress HTML
+ *
+ * This is a heavy regex-based removal of whitespace, unnecessary comments and
+ * tokens. IE conditional comments are preserved. There are also options to have
+ * STYLE and SCRIPT blocks compressed by callback functions.
+ *
+ * A test suite is available.
+ *
+ * @package Minify
+ * @author Stephen Clay <steve@mrclay.org>
+ */
+class Minify_HTML
+{
+ /**
+ * @var boolean
+ */
+ protected $_jsCleanComments = true;
+
+ /**
+ * "Minify" an HTML page
+ *
+ * @param string $html
+ *
+ * @param array $options
+ *
+ * 'cssMinifier' : (optional) callback function to process content of STYLE
+ * elements.
+ *
+ * 'jsMinifier' : (optional) callback function to process content of SCRIPT
+ * elements. Note: the type attribute is ignored.
+ *
+ * 'xhtml' : (optional boolean) should content be treated as XHTML1.0? If
+ * unset, minify will sniff for an XHTML doctype.
+ *
+ * @return string
+ */
+ public static function minify($html, $options = array())
+ {
+ $min = new self($html, $options);
+
+ return $min->process();
+ }
+
+ /**
+ * Create a minifier object
+ *
+ * @param string $html
+ *
+ * @param array $options
+ *
+ * 'cssMinifier' : (optional) callback function to process content of STYLE
+ * elements.
+ *
+ * 'jsMinifier' : (optional) callback function to process content of SCRIPT
+ * elements. Note: the type attribute is ignored.
+ *
+ * 'jsCleanComments' : (optional) whether to remove HTML comments beginning and end of script block
+ *
+ * 'xhtml' : (optional boolean) should content be treated as XHTML1.0? If
+ * unset, minify will sniff for an XHTML doctype.
+ */
+ public function __construct($html, $options = array())
+ {
+ $this->_html = str_replace("\r\n", "\n", trim($html));
+ if (isset($options['xhtml'])) {
+ $this->_isXhtml = (bool)$options['xhtml'];
+ }
+ if (isset($options['cssMinifier'])) {
+ $this->_cssMinifier = $options['cssMinifier'];
+ }
+ if (isset($options['jsMinifier'])) {
+ $this->_jsMinifier = $options['jsMinifier'];
+ }
+ if (isset($options['jsCleanComments'])) {
+ $this->_jsCleanComments = (bool)$options['jsCleanComments'];
+ }
+ }
+
+ /**
+ * Minify the markeup given in the constructor
+ *
+ * @return string
+ */
+ public function process()
+ {
+ if ($this->_isXhtml === null) {
+ $this->_isXhtml = (false !== strpos($this->_html, '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML'));
+ }
+
+ $this->_replacementHash = 'MINIFYHTML' . md5($_SERVER['REQUEST_TIME']);
+ $this->_placeholders = array();
+
+ // replace SCRIPTs (and minify) with placeholders
+ $this->_html = preg_replace_callback(
+ '/(\\s*)<script(\\b[^>]*?>)([\\s\\S]*?)<\\/script>(\\s*)/iu'
+ ,array($this, '_removeScriptCB')
+ ,$this->_html);
+
+ // replace STYLEs (and minify) with placeholders
+ $this->_html = preg_replace_callback(
+ '/\\s*<style(\\b[^>]*>)([\\s\\S]*?)<\\/style>\\s*/iu'
+ ,array($this, '_removeStyleCB')
+ ,$this->_html);
+
+ // remove HTML comments (not containing IE conditional comments).
+ $this->_html = preg_replace_callback(
+ '/<!--([\\s\\S]*?)-->/u'
+ ,array($this, '_commentCB')
+ ,$this->_html);
+
+ // replace PREs with placeholders
+ $this->_html = preg_replace_callback('/\\s*<pre(\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/iu'
+ ,array($this, '_removePreCB')
+ ,$this->_html);
+
+ // replace TEXTAREAs with placeholders
+ $this->_html = preg_replace_callback(
+ '/\\s*<textarea(\\b[^>]*?>[\\s\\S]*?<\\/textarea>)\\s*/iu'
+ ,array($this, '_removeTextareaCB')
+ ,$this->_html);
+
+ // trim each line.
+ // @todo take into account attribute values that span multiple lines.
+ $this->_html = preg_replace('/^\\s+|\\s+$/mu', '', $this->_html);
+
+ // remove ws around block/undisplayed elements
+ $this->_html = preg_replace('/\\s+(<\\/?(?:area|article|aside|base(?:font)?|blockquote|body'
+ .'|canvas|caption|center|col(?:group)?|dd|dir|div|dl|dt|fieldset|figcaption|figure|footer|form'
+ .'|frame(?:set)?|h[1-6]|head|header|hgroup|hr|html|legend|li|link|main|map|menu|meta|nav'
+ .'|ol|opt(?:group|ion)|output|p|param|section|t(?:able|body|head|d|h||r|foot|itle)'
+ .'|ul|video)\\b[^>]*>)/iu', '$1', $this->_html);
+
+ // remove ws outside of all elements
+ $this->_html = preg_replace(
+ '/>(\\s(?:\\s*))?([^<]+)(\\s(?:\s*))?</u'
+ ,'>$1$2$3<'
+ ,$this->_html);
+
+ // use newlines before 1st attribute in open tags (to limit line lengths)
+ $this->_html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/iu', "$1\n$2", $this->_html);
+
+ // fill placeholders
+ $this->_html = str_replace(
+ array_keys($this->_placeholders)
+ ,array_values($this->_placeholders)
+ ,$this->_html
+ );
+ // issue 229: multi-pass to catch scripts that didn't get replaced in textareas
+ $this->_html = str_replace(
+ array_keys($this->_placeholders)
+ ,array_values($this->_placeholders)
+ ,$this->_html
+ );
+
+ return $this->_html;
+ }
+
+ protected function _commentCB($m)
+ {
+ return (0 === strpos($m[1], '[') || false !== strpos($m[1], '<!['))
+ ? $m[0]
+ : '';
+ }
+
+ protected function _reservePlace($content)
+ {
+ $placeholder = '%' . $this->_replacementHash . count($this->_placeholders) . '%';
+ $this->_placeholders[$placeholder] = $content;
+
+ return $placeholder;
+ }
+
+ protected $_isXhtml;
+ protected $_replacementHash;
+ protected $_placeholders = array();
+ protected $_cssMinifier;
+ protected $_jsMinifier;
+
+ protected function _removePreCB($m)
+ {
+ return $this->_reservePlace("<pre{$m[1]}");
+ }
+
+ protected function _removeTextareaCB($m)
+ {
+ return $this->_reservePlace("<textarea{$m[1]}");
+ }
+
+ protected function _removeStyleCB($m)
+ {
+ $openStyle = "<style{$m[1]}";
+ $css = $m[2];
+ // remove HTML comments
+ $css = preg_replace('/(?:^\\s*<!--|-->\\s*$)/u', '', $css);
+
+ // remove CDATA section markers
+ $css = $this->_removeCdata($css);
+
+ // minify
+ $minifier = $this->_cssMinifier
+ ? $this->_cssMinifier
+ : 'trim';
+ $css = call_user_func($minifier, $css);
+
+ return $this->_reservePlace($this->_needsCdata($css)
+ ? "{$openStyle}/*<![CDATA[*/{$css}/*]]>*/</style>"
+ : "{$openStyle}{$css}</style>"
+ );
+ }
+
+ protected function _removeScriptCB($m)
+ {
+ $openScript = "<script{$m[2]}";
+ $js = $m[3];
+
+ // whitespace surrounding? preserve at least one space
+ $ws1 = ($m[1] === '') ? '' : ' ';
+ $ws2 = ($m[4] === '') ? '' : ' ';
+
+ // remove HTML comments (and ending "//" if present)
+ if ($this->_jsCleanComments) {
+ $js = preg_replace('/(?:^\\s*<!--\\s*|\\s*(?:\\/\\/)?\\s*-->\\s*$)/u', '', $js);
+ }
+
+ // remove CDATA section markers
+ $js = $this->_removeCdata($js);
+
+ // minify
+ $minifier = $this->_jsMinifier
+ ? $this->_jsMinifier
+ : 'trim';
+ $js = call_user_func($minifier, $js);
+
+ return $this->_reservePlace($this->_needsCdata($js)
+ ? "{$ws1}{$openScript}/*<![CDATA[*/{$js}/*]]>*/</script>{$ws2}"
+ : "{$ws1}{$openScript}{$js}</script>{$ws2}"
+ );
+ }
+
+ protected function _removeCdata($str)
+ {
+ return (false !== strpos($str, '<![CDATA['))
+ ? str_replace(array('<![CDATA[', ']]>'), '', $str)
+ : $str;
+ }
+
+ protected function _needsCdata($str)
+ {
+ return ($this->_isXhtml && preg_match('/(?:[<&]|\\-\\-|\\]\\]>)/u', $str));
+ }
+}
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