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<?php // $Id: mimemail_compress.inc,v 1.4 2009/04/14 15:17:49 jerdavis Exp $ |
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/** |
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* Code based on emogrifier by Pelago Design and licensed under the MIT license |
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* http://www.pelagodesign.com/sidecar/emogrifier/ |
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* |
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* http://www.opensource.org/licenses/mit-license.php |
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* |
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* Copyright (c) 2009 Pelago Design |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so. |
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*/ |
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function mimemail_compress_clean_message($message) { |
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$parts = array(); |
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preg_match('|(<style[^>]+)>(.*)</style>|mis', $message, $matches); |
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$css = str_replace('<!--', '', $matches[2]); |
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$css = str_replace('-->', '', $css); |
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$css = preg_replace('|\{|',"\n{\n", $css); |
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$css = preg_replace('|\}|',"\n}\n", $css); |
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$html = str_replace($matches[0], '', $message); |
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$parts = array('html' => $html, 'css' => $css); |
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return $parts; |
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} |
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class mimemail_compress { |
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private $html = ''; |
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private $css = ''; |
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public function mimemail_compress($html = '', $css = '') { |
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$this->html = $html; |
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$this->css = $css; |
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} |
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public function compress() { |
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error_reporting(0); |
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$doc = new DOMDocument('1.0', 'utf8'); |
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$doc->strictErrorChecking = false; |
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$doc->formatOutput = true; |
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$doc->loadHTML($this->html); |
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$doc->normalizeDocument(); |
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$xpath = new DOMXPath($doc); |
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$css = preg_replace('/\/\*.*\*\//sU', '', $this->css); |
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preg_match_all('/^\s*([^{]+){([^}]+)}/mis', $css, $matches); |
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foreach ($matches[1] as $key => $selector_string) { |
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if (!strlen(trim($matches[2][$key]))) continue; |
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$selectors = explode(',',$selector_string); |
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foreach ($selectors as $selector) { |
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if (strpos($selector,':') !== false) continue; |
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$nodes = $xpath->query($this->css_to_xpath(trim($selector))); |
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foreach($nodes as $node) { |
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if ($node->hasAttribute('style')) { |
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$style = $node->getAttribute('style'); |
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$old_style = $this->css_style_to_array($node->getAttribute('style')); |
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$new_style = $this->css_style_to_array($matches[2][$key]); |
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$compressed = array_merge($old_style,$new_style); |
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$style = ''; |
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foreach ($compressed as $k => $v) $style .= ($k . ':' . $v . ';'); |
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} |
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else { |
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$style = trim($matches[2][$key]); |
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} |
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$node->setAttribute('style',$style); |
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} |
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} |
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} |
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$nodes = $xpath->query('//*[contains(translate(@style," ",""),"display:none;")]'); |
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foreach ($nodes as $node) $node->parentNode->removeChild($node); |
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return $doc->saveHTML(); |
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} |
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private function css_to_xpath($selector) { |
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$search = array( |
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'/\s+>\s+/', |
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'/(\w+)\s+\+\s+(\w+)/', |
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'/\s+/', |
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'/(\w+)?\#([\w\-]+)/e', |
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'/(\w+)?\.([\w\-]+)/e', |
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); |
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$replace = array( |
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'/', |
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'\\1/following-sibling::*[1]/self::\\2', |
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'//', |
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"(strlen('\\1') ? '\\1' : '*').'[@id=\"\\2\"]'", |
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"(strlen('\\1') ? '\\1' : '*').'[contains(concat(\" \",@class,\" \"),concat(\" \",\"\\2\",\" \"))]'", |
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); |
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return '//'.preg_replace($search, $replace, trim($selector)); |
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} |
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private function css_style_to_array($style) { |
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$definitions = explode(';',$style); |
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$css_styles = array(); |
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foreach ($definitions as $def) { |
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list($key,$value) = explode(':',$def); |
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if (empty($key) || empty($value)) continue; |
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$css_styles[trim($key)] = trim($value); |
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} |
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return $css_styles; |
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} |
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} |
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