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<?php |
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/** |
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* @package CleverStyle Framework |
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* @author Nazar Mokrynskyi <[email protected]> |
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* @copyright Copyright (c) 2014-2016, Nazar Mokrynskyi |
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* @license MIT License, see license.txt |
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*/ |
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namespace cs\Page; |
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/** |
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* Class includes few methods used for processing CSS, JS and HTML files before putting into cache |
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* |
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* This is because CSS and HTML files may include other CSS, JS files, images, fonts and so on with absolute and relative paths. |
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* Methods of this class handle all this assets, applies basic minification to CSS and JS files and produce single resulting file (relative paths to |
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* files that can't be embedded are converted to absolute). This allows to decrease number of HTTP requests on page and avoid breaking of relative paths for |
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* fonts, images and other assets after putting them into cache directory as well as minimize contents size by removing comments and other redundant stuff. |
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*/ |
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class Assets_processing { |
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/** |
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* Do not inline files bigger than 4 KiB |
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*/ |
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const MAX_EMBEDDING_SIZE = 4096; |
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protected static $extension_to_mime = [ |
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'jpeg' => 'image/jpg', |
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'jpe' => 'image/jpg', |
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'jpg' => 'image/jpg', |
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'gif' => 'image/gif', |
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'png' => 'image/png', |
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'svg' => 'image/svg+xml', |
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'svgz' => 'image/svg+xml', |
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'woff' => 'application/font-woff', |
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//'woff2' => 'application/font-woff2' |
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]; |
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/** |
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* Analyses file for images, fonts and css links and include they content into single resulting css file. |
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* |
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* Supports next file extensions for possible assets: |
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* jpeg, jpe, jpg, gif, png, ttf, ttc, svg, svgz, woff, css |
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* |
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* @param string $data Content of processed file |
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* @param string $file Path to file, that contains specified in previous parameter content |
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* @param string $target_directory_path Target directory for resulting combined files |
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* @param string[] $not_embedded_resources Some resources like images and fonts might not be embedded into resulting CSS because of their size |
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* |
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* @return string $data |
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*/ |
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public static function css ($data, $file, $target_directory_path = PUBLIC_CACHE, &$not_embedded_resources = []) { |
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$dir = dirname($file); |
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/** |
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* Remove comments, tabs and new lines |
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*/ |
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$data = preg_replace('#(/\*.*?\*/)|\t|\n|\r#s', ' ', $data); |
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/** |
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* Remove unnecessary spaces |
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*/ |
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$data = preg_replace('/\s*([,;>{}(])\s*/', '$1', $data); |
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$data = preg_replace('/\s+/', ' ', $data); |
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/** |
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* Return spaces required in media queries |
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*/ |
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$data = preg_replace('/\s(and|or)\(/', ' $1 (', $data); |
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/** |
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* Duplicated semicolons |
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*/ |
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$data = preg_replace('/;+/m', ';', $data); |
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/** |
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* Minify rgb colors declarations |
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*/ |
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$data = preg_replace_callback( |
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'/rgb\(([0-9,.]+)\)/i', |
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function ($rgb) { |
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$rgb = explode(',', $rgb[1]); |
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return |
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'#'. |
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str_pad(dechex($rgb[0]), 2, 0, STR_PAD_LEFT). |
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str_pad(dechex($rgb[1]), 2, 0, STR_PAD_LEFT). |
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str_pad(dechex($rgb[2]), 2, 0, STR_PAD_LEFT); |
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}, |
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$data |
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); |
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/** |
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* Minify repeated colors declarations |
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*/ |
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$data = preg_replace('/#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3/i', '#$1$2$3', $data); |
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/** |
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* Remove unnecessary zeros |
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*/ |
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$data = preg_replace('/(\D)0\.(\d+)/i', '$1.$2', $data); |
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/** |
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* Unnecessary spaces around colons (should have whitespace character after, otherwise might be `.c :disabled` and will be handled incorrectly) |
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*/ |
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$data = preg_replace('/\s*:\s+/', ':', $data); |
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/** |
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* Assets processing |
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*/ |
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// TODO: replace by loop, track duplicated stuff that are subject to inlining and if they appear more than once, don't inline them |
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$data = preg_replace_callback( |
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'/url\((.*)\)|@import\s*(?:url\()?\s*([\'"].*[\'"])\s*\)??(.*);/U', |
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function ($match) use ($dir, $target_directory_path, &$not_embedded_resources) { |
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$path_matched = @$match[2] ?: $match[1]; |
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$path = trim($path_matched, '\'" '); |
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$link = explode('?', $path, 2)[0]; |
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if (!static::is_relative_path_and_exists($link, $dir)) { |
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return $match[0]; |
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} |
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$extension = file_extension($link); |
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$absolute_path = static::absolute_path($link, $dir); |
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$content = file_get_contents($absolute_path); |
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if ($extension == 'css' && @$match[2]) { |
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/** |
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* Only inline CSS imports without media queries, imports with media queries will be placed as separate files |
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*/ |
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if (!trim(@$match[3])) { |
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return static::css($content, $absolute_path, $target_directory_path, $not_embedded_resources); |
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} else { |
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$filename = static::file_put_contents_with_hash( |
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$target_directory_path, |
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$extension, |
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static::css($content, $absolute_path, $target_directory_path) |
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); |
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return str_replace($path_matched, "'./$filename'", $match[0]); |
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} |
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} |
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if (!isset(static::$extension_to_mime[$extension])) { |
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$filename = static::file_put_contents_with_hash($target_directory_path, $extension, $content); |
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return str_replace($path_matched, "'./$filename'", $match[0]); |
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} |
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if (filesize($absolute_path) > static::MAX_EMBEDDING_SIZE) { |
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$filename = md5_file($absolute_path).'.'.$extension; |
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copy($absolute_path, "$target_directory_path/$filename"); |
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if (strpos($path, '?') === false) { |
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$not_embedded_resources[] = str_replace(getcwd(), '', "$target_directory_path/$filename"); |
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} |
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return str_replace($path_matched, "'./$filename'", $match[0]); |
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} |
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$mime_type = static::$extension_to_mime[$extension]; |
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$content = base64_encode($content); |
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return str_replace($path, "data:$mime_type;charset=utf-8;base64,$content", $match[0]); |
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}, |
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$data |
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); |
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return trim($data); |
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} |
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/** |
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* Put `$content` into `$dir` where filename is `md5($content)` with specified extension |
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* |
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* @param string $dir |
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* @param string $extension |
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* @param string $content |
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* |
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* @return string Filename (without full path) |
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*/ |
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protected static function file_put_contents_with_hash ($dir, $extension, $content) { |
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$hash = md5($content); |
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file_put_contents("$dir/$hash.$extension", $content, LOCK_EX | FILE_BINARY); |
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return "$hash.$extension"; |
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} |
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/** |
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* Simple and fast JS minification |
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* |
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* @param string $data |
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* |
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* @return string |
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*/ |
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public static function js ($data) { |
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/** |
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* Split into array of lines |
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*/ |
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$data = explode("\n", $data); |
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/** |
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* Flag that is `true` when inside comment |
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*/ |
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$in_comment = false; |
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$continue_after_position = -1; |
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foreach ($data as $index => &$current_line) { |
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if ($continue_after_position >= $index) { |
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continue; |
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} |
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$next_line = isset($data[$index + 1]) ? trim($data[$index + 1]) : ''; |
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/** |
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* Remove starting and trailing spaces |
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*/ |
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$current_line = trim($current_line); |
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/** |
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* Remove single-line comments |
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*/ |
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if (mb_strpos($current_line, '//') === 0) { |
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$current_line = ''; |
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continue; |
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} |
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/** |
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* Starts with multi-line comment |
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*/ |
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if (mb_strpos($current_line, '/*') === 0) { |
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$in_comment = true; |
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} |
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if (!$in_comment) { |
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$backticks_position = strpos($current_line, '`'); |
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/** |
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* Handling template strings can be tricky (since they might be multi-line), so let's fast-forward to the last backticks position and continue |
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* from there |
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*/ |
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if ($backticks_position !== false) { |
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$last_item_with_backticks = array_keys( |
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array_filter( |
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$data, |
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function ($d) { |
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return strpos($d, '`') !== false; |
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} |
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) |
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); |
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$last_item_with_backticks = array_pop($last_item_with_backticks); |
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if ($last_item_with_backticks > $index) { |
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$continue_after_position = $last_item_with_backticks; |
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continue; |
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} |
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} |
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/** |
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* Add new line at the end if only needed |
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*/ |
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if (static::new_line_needed($current_line, $next_line)) { |
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$current_line .= "\n"; |
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} |
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/** |
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* Single-line comment |
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*/ |
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$current_line = preg_replace('#^\s*//[^\'"]+$#', '', $current_line); |
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/** |
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* If we are not sure - just add new line afterwards |
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*/ |
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$current_line = preg_replace('#//.*$#', "\\0\n", $current_line); |
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} else { |
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/** |
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* End of multi-line comment |
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*/ |
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if (strpos($current_line, '*/') !== false) { |
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$current_line = explode('*/', $current_line)[1]; |
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$in_comment = false; |
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} else { |
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$current_line = ''; |
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} |
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} |
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} |
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$data = implode('', $data); |
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$data = str_replace('</script>', '<\/script>', $data); |
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return trim($data, ';').';'; |
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} |
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/** |
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* @param string $current_line |
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* @param string $next_line |
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* |
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* @return bool |
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*/ |
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protected static function new_line_needed ($current_line, $next_line) { |
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/** |
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* Set of symbols that are safe to be concatenated without new line with anything else |
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*/ |
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$regexp = /** @lang PhpRegExp */ |
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'[:;,.+\-*/{}?><^\'"\[\]=&(]'; |
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return |
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10 |
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$current_line && |
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10 |
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$next_line && |
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!preg_match("#$regexp\$#", $current_line) && |
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!preg_match("#^$regexp#", $next_line); |
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} |
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/** |
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* Analyses file for scripts and styles, combines them into resulting files in order to optimize loading process |
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* (files with combined scripts and styles will be created) |
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* |
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270
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* @param string $data Content of processed file |
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* @param string $file Path to file, that contains specified in previous parameter content |
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* @param string $target_directory_path Target directory for resulting combined files |
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* @param bool $vulcanization Whether to put combined files separately or to make included assets built-in (vulcanization) |
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* @param string[] $not_embedded_resources Resources like images/fonts might not be embedded into resulting CSS because of big size or CSS/JS because of CSP |
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* |
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* @return string |
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*/ |
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8 |
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public static function html ($data, $file, $target_directory_path, $vulcanization, &$not_embedded_resources = []) { |
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8 |
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static::html_process_links_and_styles($data, $file, $target_directory_path, $vulcanization, $not_embedded_resources); |
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8 |
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static::html_process_scripts($data, $file, $target_directory_path, $vulcanization, $not_embedded_resources); |
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// Removing HTML comments (those that are mostly likely comments, to avoid problems) |
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8 |
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$data = preg_replace_callback( |
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8 |
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'/^\s*<!--([^>-].*[^-])?-->/Ums', |
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8 |
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function ($matches) { |
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285
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8 |
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return mb_strpos('--', $matches[1]) === false ? '' : $matches[0]; |
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8 |
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}, |
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$data |
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288
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); |
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8 |
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return preg_replace("/\n+/", "\n", $data); |
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290
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} |
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291
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/** |
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292
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* @param string $data Content of processed file |
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293
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* @param string $file Path to file, that contains specified in previous parameter content |
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294
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* @param string $target_directory_path Target directory for resulting combined files |
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295
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|
* @param bool $vulcanization Whether to put combined files separately or to make included assets built-in (vulcanization) |
|
296
|
|
|
* @param string[] $not_embedded_resources Resources like images/fonts might not be embedded into resulting CSS because of big size or CSS/JS because of CSP |
|
297
|
|
|
*/ |
|
298
|
8 |
|
protected static function html_process_scripts (&$data, $file, $target_directory_path, $vulcanization, &$not_embedded_resources) { |
|
299
|
8 |
|
if (!preg_match_all('/<script(.*)<\/script>/Uims', $data, $scripts)) { |
|
300
|
8 |
|
return; |
|
301
|
|
|
} |
|
302
|
8 |
|
$scripts_content = ''; |
|
303
|
8 |
|
$scripts_to_replace = []; |
|
304
|
8 |
|
$dir = dirname($file); |
|
305
|
8 |
|
foreach ($scripts[1] as $index => $script) { |
|
306
|
8 |
|
$script = explode('>', $script, 2); |
|
307
|
8 |
|
if (preg_match('/src\s*=\s*[\'"](.*)[\'"]/Uims', $script[0], $url)) { |
|
308
|
8 |
|
$url = $url[1]; |
|
309
|
8 |
|
if (!static::is_relative_path_and_exists($url, $dir)) { |
|
310
|
4 |
|
continue; |
|
311
|
|
|
} |
|
312
|
8 |
|
$scripts_to_replace[] = $scripts[0][$index]; |
|
313
|
8 |
|
$scripts_content .= file_get_contents("$dir/$url").";\n"; |
|
314
|
|
|
} else { |
|
315
|
8 |
|
$scripts_to_replace[] = $scripts[0][$index]; |
|
316
|
8 |
|
$scripts_content .= "$script[1];\n"; |
|
317
|
|
|
} |
|
318
|
|
|
} |
|
319
|
8 |
|
$scripts_content = static::js($scripts_content); |
|
320
|
8 |
|
if (!$scripts_to_replace) { |
|
321
|
4 |
|
return; |
|
322
|
|
|
} |
|
323
|
|
|
// Remove all scripts |
|
324
|
8 |
|
$data = str_replace($scripts_to_replace, '', $data); |
|
325
|
|
|
/** |
|
326
|
|
|
* If vulcanization is not used - put contents into separate file, and put link to it, otherwise put minified content back |
|
327
|
|
|
*/ |
|
328
|
8 |
|
if (!$vulcanization) { |
|
329
|
|
|
// TODO: Remove in 7.x; For backward compatibility, since some modules might use this by specifying file path |
|
330
|
2 |
|
if (!is_dir($target_directory_path)) { |
|
331
|
|
|
$target_directory_path = dirname($target_directory_path); |
|
332
|
|
|
} |
|
333
|
2 |
|
$filename = static::file_put_contents_with_hash($target_directory_path, 'js', $scripts_content); |
|
334
|
|
|
// Add script with combined content file to the end |
|
335
|
2 |
|
$data .= "<script src=\"./$filename\"></script>"; |
|
336
|
2 |
|
$not_embedded_resources[] = str_replace(getcwd(), '', "$target_directory_path/$filename"); |
|
337
|
|
|
} else { |
|
338
|
|
|
// Add combined content inline script to the end |
|
339
|
6 |
|
$data .= "<script>$scripts_content</script>"; |
|
340
|
|
|
} |
|
341
|
8 |
|
} |
|
342
|
|
|
/** |
|
343
|
|
|
* @param string $data Content of processed file |
|
344
|
|
|
* @param string $file Path to file, that contains specified in previous parameter content |
|
345
|
|
|
* @param string $target_directory_path Target directory for resulting combined files |
|
346
|
|
|
* @param bool $vulcanization Whether to put combined files separately or to make included assets built-in (vulcanization) |
|
347
|
|
|
* @param string[] $not_embedded_resources Resources like images/fonts might not be embedded into resulting CSS because of big size or CSS/JS because of CSP |
|
348
|
|
|
*/ |
|
349
|
8 |
|
protected static function html_process_links_and_styles (&$data, $file, $target_directory_path, $vulcanization, &$not_embedded_resources) { |
|
350
|
|
|
// Drop Polymer inclusion, since it is already present |
|
351
|
8 |
|
$data = str_replace('<link rel="import" href="../polymer/polymer.html">', '', $data); |
|
352
|
8 |
|
if (!preg_match_all('/<link(.*)>|<style(.*)<\/style>/Uims', $data, $links_and_styles)) { |
|
353
|
8 |
|
return; |
|
354
|
|
|
} |
|
355
|
8 |
|
$dir = dirname($file); |
|
356
|
8 |
|
foreach ($links_and_styles[1] as $index => $link) { |
|
357
|
|
|
/** |
|
358
|
|
|
* Check for custom styles `is="custom-style"` or styles includes `include=".."` - we'll skip them |
|
359
|
|
|
* Or if content is plain CSS |
|
360
|
|
|
*/ |
|
361
|
|
|
if ( |
|
362
|
8 |
|
preg_match('/^[^>]*(is="custom-style"|include=)[^>]*>/Uim', $links_and_styles[2][$index]) || |
|
363
|
8 |
|
mb_strpos($links_and_styles[0][$index], '</style>') > 0 |
|
364
|
|
|
) { |
|
365
|
8 |
|
$content = explode('>', $links_and_styles[2][$index], 2)[1]; |
|
366
|
8 |
|
$data = str_replace( |
|
367
|
|
|
$content, |
|
368
|
8 |
|
static::css($content, $file, $target_directory_path, $not_embedded_resources), |
|
369
|
|
|
$data |
|
370
|
|
|
); |
|
371
|
8 |
|
continue; |
|
372
|
|
|
} |
|
373
|
8 |
|
if (!static::has_relative_href($link, $url, $dir)) { |
|
374
|
4 |
|
continue; |
|
375
|
|
|
} |
|
376
|
8 |
|
$import = preg_match('/rel\s*=\s*[\'"]import[\'"]/Uim', $link); |
|
377
|
|
|
/** |
|
378
|
|
|
* CSS imports are available in Polymer alongside with HTML imports |
|
379
|
|
|
*/ |
|
380
|
8 |
|
$css_import = $import && preg_match('/type\s*=\s*[\'"]css[\'"]/Uim', $link); |
|
381
|
8 |
|
$stylesheet = preg_match('/rel\s*=\s*[\'"]stylesheet[\'"]/Uim', $link); |
|
382
|
|
|
// TODO: Polymer only supports `style[is=custom-style]`, but no `link`-based counterpart, so we can't provide CSP-compatibility for CSS anyway |
|
383
|
8 |
|
if ($css_import || $stylesheet) { |
|
384
|
|
|
/** |
|
385
|
|
|
* If content is link to CSS file |
|
386
|
|
|
*/ |
|
387
|
8 |
|
$css = static::css( |
|
388
|
8 |
|
file_get_contents("$dir/$url"), |
|
389
|
8 |
|
"$dir/$url", |
|
390
|
|
|
$target_directory_path, |
|
391
|
|
|
$not_embedded_resources |
|
392
|
|
|
); |
|
393
|
8 |
|
$data = preg_replace( |
|
394
|
8 |
|
'/'.$links_and_styles[0][$index].'.*<template>/Uims', |
|
395
|
8 |
|
"<template><style>$css</style>", |
|
396
|
|
|
$data |
|
397
|
|
|
); |
|
398
|
4 |
|
} elseif ($import) { |
|
399
|
|
|
/** |
|
400
|
|
|
* If content is HTML import |
|
401
|
|
|
*/ |
|
402
|
4 |
|
$data = str_replace( |
|
403
|
4 |
|
$links_and_styles[0][$index], |
|
404
|
4 |
|
static::html( |
|
405
|
4 |
|
file_get_contents("$dir/$url"), |
|
406
|
8 |
|
"$dir/$url", |
|
407
|
|
|
$target_directory_path, |
|
408
|
|
|
$vulcanization, |
|
409
|
|
|
$not_embedded_resources |
|
410
|
|
|
), |
|
411
|
|
|
$data |
|
412
|
|
|
); |
|
413
|
|
|
} |
|
414
|
|
|
} |
|
415
|
8 |
|
} |
|
416
|
|
|
/** |
|
417
|
|
|
* @param string $link |
|
418
|
|
|
* @param string $url |
|
419
|
|
|
* @param string $dir |
|
420
|
|
|
* |
|
421
|
|
|
* @return bool |
|
422
|
|
|
*/ |
|
423
|
8 |
|
protected static function has_relative_href ($link, &$url, $dir) { |
|
424
|
|
|
$result = |
|
425
|
8 |
|
$link && |
|
426
|
8 |
|
preg_match('/href\s*=\s*[\'"](.*)[\'"]/Uims', $link, $url); |
|
427
|
8 |
|
if ($result && static::is_relative_path_and_exists($url[1], $dir)) { |
|
428
|
8 |
|
$url = $url[1]; |
|
429
|
8 |
|
return true; |
|
430
|
|
|
} |
|
431
|
4 |
|
return false; |
|
432
|
|
|
} |
|
433
|
|
|
/** |
|
434
|
|
|
* @param string $path |
|
435
|
|
|
* @param string $dir |
|
436
|
|
|
* |
|
437
|
|
|
* @return bool |
|
438
|
|
|
*/ |
|
439
|
10 |
|
protected static function is_relative_path_and_exists ($path, $dir) { |
|
440
|
10 |
|
return $dir && !preg_match('#^https?://#i', $path) && file_exists(static::absolute_path($path, $dir)); |
|
441
|
|
|
} |
|
442
|
|
|
/** |
|
443
|
|
|
* @param string $path |
|
444
|
|
|
* @param string $dir |
|
445
|
|
|
* |
|
446
|
|
|
* @return string |
|
447
|
|
|
*/ |
|
448
|
10 |
|
protected static function absolute_path ($path, $dir) { |
|
449
|
10 |
|
if (strpos($path, '/') === 0) { |
|
450
|
6 |
|
return realpath(getcwd().$path); |
|
451
|
|
|
} |
|
452
|
10 |
|
return realpath("$dir/$path"); |
|
453
|
|
|
} |
|
454
|
|
|
} |
|
455
|
|
|
|
nazar-pc /
CleverStyle-Framework
