lib/Ajde/Document/Processor/Html/Compressor.php
<?php
class Ajde_Document_Processor_Html_Compressor extends Ajde_Object_Static implements Ajde_Document_Processor
{
// Not implemented
public static function preProcess(Ajde_Layout $layout)
{
}
public static function preCompress(Ajde_Resource_Local_Compressor $compressor)
{
}
public static function postCompress(Ajde_Resource_Local_Compressor $compressor)
{
}
public static function postProcess(Ajde_Layout $layout)
{
$layout->setContents(self::minifyHtml($layout->getContents()));
}
public static function minifyHtml($html, $options = ['xhtml' => true])
{
return Minify_HTML::minify($html, $options);
}
}
/**
* Uses Minify_HTML from the excellent Minify project (http://code.google.com/p/minify/).
*
* Only change made is that we commented out this rule (line 168):
*
* // use newlines before 1st attribute in open tags (to limit line lengths)
* $this->_html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "$1\n$2", $this->_html);
*
* This will put all the HTML on one single line, reducing the size even
* further (no line-breaks) at the cost of readability.
*/
/**
* Class Minify_HTML.
*/
/**
* 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.
*
* @author Stephen Clay <steve@mrclay.org>
*/
class Minify_HTML
{
/**
* "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 = [])
{
$min = new self($html, $options);
return $min->process();
}
/**
* Create a minifier object.
*
* @param string $html
* @param array $options
*
* 'cssMinifier' : (optional) callback function to process content of STYLE
* elements.
*
* 'jsMinifier' : (optional) callback function to process content of SCRIPT
* elements. Note: the type attribute is ignored.
*
* 'xhtml' : (optional boolean) should content be treated as XHTML1.0? If
* unset, minify will sniff for an XHTML doctype.
*
* @return null
*/
public function __construct($html, $options = [])
{
$this->_html = str_replace("\r\n", "\n", trim($html));
if (isset($options['xhtml'])) {
$this->_isXhtml = (bool) $options['xhtml'];
}
if (isset($options['cssMinifier'])) {
$this->_cssMinifier = $options['cssMinifier'];
}
if (isset($options['jsMinifier'])) {
$this->_jsMinifier = $options['jsMinifier'];
}
}
/**
* Minify the markeup given in the constructor.
*
* @return string
*/
public function process()
{
if ($this->_isXhtml === null) {
$this->_isXhtml = (false !== strpos($this->_html, '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML'));
}
$this->_replacementHash = 'MINIFYHTML'.md5($_SERVER['REQUEST_TIME']);
$this->_placeholders = [];
// replace SCRIPTs (and minify) with placeholders
$this->_html = preg_replace_callback(
'/(\\s*)<script(\\b[^>]*?>)([\\s\\S]*?)<\\/script>(\\s*)/i', [$this, '_removeScriptCB'], $this->_html);
// replace STYLEs (and minify) with placeholders
$this->_html = preg_replace_callback(
'/\\s*<style(\\b[^>]*>)([\\s\\S]*?)<\\/style>\\s*/i', [$this, '_removeStyleCB'], $this->_html);
// remove HTML comments (not containing IE conditional comments).
$this->_html = preg_replace_callback(
'/<!--([\\s\\S]*?)-->/', [$this, '_commentCB'], $this->_html);
// replace PREs with placeholders
$this->_html = preg_replace_callback('/\\s*<pre(\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/i', [$this, '_removePreCB'], $this->_html);
// replace TEXTAREAs with placeholders
$this->_html = preg_replace_callback(
'/\\s*<textarea(\\b[^>]*?>[\\s\\S]*?<\\/textarea>)\\s*/i', [$this, '_removeTextareaCB'], $this->_html);
// trim each line.
// @todo take into account attribute values that span multiple lines.
$this->_html = preg_replace('/^\\s+|\\s+$/m', '', $this->_html);
// remove ws around block/undisplayed elements
$this->_html = preg_replace('/\\s+(<\\/?(?:area|base(?:font)?|blockquote|body'
.'|caption|center|cite|col(?:group)?|dd|dir|div|dl|dt|fieldset|form'
.'|frame(?:set)?|h[1-6]|head|hr|html|legend|li|link|map|menu|meta'
.'|ol|opt(?:group|ion)|p|param|t(?:able|body|head|d|h||r|foot|itle)'
.'|ul)\\b[^>]*>)/i', '$1', $this->_html);
// remove ws outside of all elements
$this->_html = preg_replace(
'/>(\\s(?:\\s*))?([^<]+)(\\s(?:\s*))?</', '>$1$2$3<', $this->_html);
// use newlines before 1st attribute in open tags (to limit line lengths)
//$this->_html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "$1\n$2", $this->_html);
// fill placeholders
$this->_html = str_replace(
array_keys($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 = null;
protected $_replacementHash = null;
protected $_placeholders = [];
protected $_cssMinifier = null;
protected $_jsMinifier = null;
protected function _removePreCB($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
$css = preg_replace('/(?:^\\s*<!--|-->\\s*$)/', '', $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)
$js = preg_replace('/(?:^\\s*<!--\\s*|\\s*(?:\\/\\/)?\\s*-->\\s*$)/', '', $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(['<![CDATA[', ']]>'], '', $str)
: $str;
}
protected function _needsCdata($str)
{
return $this->_isXhtml && preg_match('/(?:[<&]|\\-\\-|\\]\\]>)/', $str);
}
}