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minifier.cls.php 0000644 00000074425 14711305702 0007653 0 ustar 00 <?php /*! * CssMin * Author: Tubal Martin - http://tubalmartin.me/ * Repo: https://github.com/tubalmartin/YUI-CSS-compressor-PHP-port * * This is a PHP port of the CSS minification tool distributed with YUICompressor, * itself a port of the cssmin utility by Isaac Schlueter - http://foohack.com/ * Permission is hereby granted to use the PHP version under the same * conditions as the YUICompressor. */ /*! * YUI Compressor * http://developer.yahoo.com/yui/compressor/ * Author: Julien Lecomte - http://www.julienlecomte.net/ * Copyright (c) 2013 Yahoo! Inc. All rights reserved. * The copyrights embodied in the content of this file are licensed * by Yahoo! Inc. under the BSD (revised) open source license. */ namespace LiteSpeed\Lib\CSS_MIN ; defined( 'WPINC' ) || exit ; class Minifier { const QUERY_FRACTION = '_CSSMIN_QF_'; const COMMENT_TOKEN = '_CSSMIN_CMT_%d_'; const COMMENT_TOKEN_START = '_CSSMIN_CMT_'; const RULE_BODY_TOKEN = '_CSSMIN_RBT_%d_'; const PRESERVED_TOKEN = '_CSSMIN_PTK_%d_'; // Token lists private $comments = array(); private $ruleBodies = array(); private $preservedTokens = array(); // Output options private $keepImportantComments = true; private $keepSourceMapComment = false; private $linebreakPosition = 0; // PHP ini limits private $raisePhpLimits; private $memoryLimit; private $maxExecutionTime = 60; // 1 min private $pcreBacktrackLimit; private $pcreRecursionLimit; // Color maps private $hexToNamedColorsMap; private $namedToHexColorsMap; // Regexes private $numRegex; private $charsetRegex = '/@charset [^;]+;/Si'; private $importRegex = '/@import [^;]+;/Si'; private $namespaceRegex = '/@namespace [^;]+;/Si'; private $namedToHexColorsRegex; private $shortenOneZeroesRegex; private $shortenTwoZeroesRegex; private $shortenThreeZeroesRegex; private $shortenFourZeroesRegex; private $unitsGroupRegex = '(?:ch|cm|em|ex|gd|in|mm|px|pt|pc|q|rem|vh|vmax|vmin|vw|%)'; /** * @param bool|int $raisePhpLimits If true, PHP settings will be raised if needed */ public function __construct($raisePhpLimits = true) { $this->raisePhpLimits = (bool) $raisePhpLimits; $this->memoryLimit = 128 * 1048576; // 128MB in bytes $this->pcreBacktrackLimit = 1000 * 1000; $this->pcreRecursionLimit = 500 * 1000; $this->hexToNamedColorsMap = Colors::getHexToNamedMap(); $this->namedToHexColorsMap = Colors::getNamedToHexMap(); $this->namedToHexColorsRegex = sprintf( '/([:,( ])(%s)( |,|\)|;|$)/Si', implode('|', array_keys($this->namedToHexColorsMap)) ); $this->numRegex = sprintf('-?\d*\.?\d+%s?', $this->unitsGroupRegex); $this->setShortenZeroValuesRegexes(); } /** * Parses & minifies the given input CSS string * @param string $css * @return string */ public function run($css = '') { if (empty($css) || !is_string($css)) { return ''; } $this->resetRunProperties(); if ($this->raisePhpLimits) { $this->doRaisePhpLimits(); } return $this->minify($css); } /** * Sets whether to keep or remove sourcemap special comment. * Sourcemap comments are removed by default. * @param bool $keepSourceMapComment */ public function keepSourceMapComment($keepSourceMapComment = true) { $this->keepSourceMapComment = (bool) $keepSourceMapComment; } /** * Sets whether to keep or remove important comments. * Important comments outside of a declaration block are kept by default. * @param bool $removeImportantComments */ public function removeImportantComments($removeImportantComments = true) { $this->keepImportantComments = !(bool) $removeImportantComments; } /** * Sets the approximate column after which long lines will be splitted in the output * with a linebreak. * @param int $position */ public function setLineBreakPosition($position) { $this->linebreakPosition = (int) $position; } /** * Sets the memory limit for this script * @param int|string $limit */ public function setMemoryLimit($limit) { $this->memoryLimit = Utils::normalizeInt($limit); } /** * Sets the maximum execution time for this script * @param int|string $seconds */ public function setMaxExecutionTime($seconds) { $this->maxExecutionTime = (int) $seconds; } /** * Sets the PCRE backtrack limit for this script * @param int $limit */ public function setPcreBacktrackLimit($limit) { $this->pcreBacktrackLimit = (int) $limit; } /** * Sets the PCRE recursion limit for this script * @param int $limit */ public function setPcreRecursionLimit($limit) { $this->pcreRecursionLimit = (int) $limit; } /** * Builds regular expressions needed for shortening zero values */ private function setShortenZeroValuesRegexes() { $zeroRegex = '0'. $this->unitsGroupRegex; $numOrPosRegex = '('. $this->numRegex .'|top|left|bottom|right|center) '; $oneZeroSafeProperties = array( '(?:line-)?height', '(?:(?:min|max)-)?width', 'top', 'left', 'background-position', 'bottom', 'right', 'border(?:-(?:top|left|bottom|right))?(?:-width)?', 'border-(?:(?:top|bottom)-(?:left|right)-)?radius', 'column-(?:gap|width)', 'margin(?:-(?:top|left|bottom|right))?', 'outline-width', 'padding(?:-(?:top|left|bottom|right))?' ); // First zero regex $regex = '/(^|;)('. implode('|', $oneZeroSafeProperties) .'):%s/Si'; $this->shortenOneZeroesRegex = sprintf($regex, $zeroRegex); // Multiple zeroes regexes $regex = '/(^|;)(margin|padding|border-(?:width|radius)|background-position):%s/Si'; $this->shortenTwoZeroesRegex = sprintf($regex, $numOrPosRegex . $zeroRegex); $this->shortenThreeZeroesRegex = sprintf($regex, $numOrPosRegex . $numOrPosRegex . $zeroRegex); $this->shortenFourZeroesRegex = sprintf($regex, $numOrPosRegex . $numOrPosRegex . $numOrPosRegex . $zeroRegex); } /** * Resets properties whose value may change between runs */ private function resetRunProperties() { $this->comments = array(); $this->ruleBodies = array(); $this->preservedTokens = array(); } /** * Tries to configure PHP to use at least the suggested minimum settings * @return void */ private function doRaisePhpLimits() { $phpLimits = array( 'memory_limit' => $this->memoryLimit, 'max_execution_time' => $this->maxExecutionTime, 'pcre.backtrack_limit' => $this->pcreBacktrackLimit, 'pcre.recursion_limit' => $this->pcreRecursionLimit ); // If current settings are higher respect them. foreach ($phpLimits as $name => $suggested) { $current = Utils::normalizeInt(ini_get($name)); if ($current >= $suggested) { continue; } // memoryLimit exception: allow -1 for "no memory limit". if ($name === 'memory_limit' && $current === -1) { continue; } // maxExecutionTime exception: allow 0 for "no memory limit". if ($name === 'max_execution_time' && $current === 0) { continue; } ini_set($name, $suggested); } } /** * Registers a preserved token * @param string $token * @return string The token ID string */ private function registerPreservedToken($token) { $tokenId = sprintf(self::PRESERVED_TOKEN, count($this->preservedTokens)); $this->preservedTokens[$tokenId] = $token; return $tokenId; } /** * Registers a candidate comment token * @param string $comment * @return string The comment token ID string */ private function registerCommentToken($comment) { $tokenId = sprintf(self::COMMENT_TOKEN, count($this->comments)); $this->comments[$tokenId] = $comment; return $tokenId; } /** * Registers a rule body token * @param string $body the minified rule body * @return string The rule body token ID string */ private function registerRuleBodyToken($body) { if (empty($body)) { return ''; } $tokenId = sprintf(self::RULE_BODY_TOKEN, count($this->ruleBodies)); $this->ruleBodies[$tokenId] = $body; return $tokenId; } /** * Parses & minifies the given input CSS string * @param string $css * @return string */ private function minify($css) { // Process data urls $css = $this->processDataUrls($css); // Process comments $css = preg_replace_callback( '/(?<!\\\\)\/\*(.*?)\*(?<!\\\\)\//Ss', array($this, 'processCommentsCallback'), $css ); // IE7: Process Microsoft matrix filters (whitespaces between Matrix parameters). Can contain strings inside. $css = preg_replace_callback( '/filter:\s*progid:DXImageTransform\.Microsoft\.Matrix\(([^)]+)\)/Ss', array($this, 'processOldIeSpecificMatrixDefinitionCallback'), $css ); // Process quoted unquotable attribute selectors to unquote them. Covers most common cases. // Likelyhood of a quoted attribute selector being a substring in a string: Very very low. $css = preg_replace( '/\[\s*([a-z][a-z-]+)\s*([\*\|\^\$~]?=)\s*[\'"](-?[a-z_][a-z0-9-_]+)[\'"]\s*\]/Ssi', '[$1$2$3]', $css ); // Process strings so their content doesn't get accidentally minified $css = preg_replace_callback( '/(?:"(?:[^\\\\"]|\\\\.|\\\\)*")|'."(?:'(?:[^\\\\']|\\\\.|\\\\)*')/S", array($this, 'processStringsCallback'), $css ); // Normalize all whitespace strings to single spaces. Easier to work with that way. $css = preg_replace('/\s+/S', ' ', $css); // Process comments $css = $this->processComments($css); // Process rule bodies $css = $this->processRuleBodies($css); // Process at-rules and selectors $css = $this->processAtRulesAndSelectors($css); // Restore preserved rule bodies before splitting $css = strtr($css, $this->ruleBodies); // Some source control tools don't like it when files containing lines longer // than, say 8000 characters, are checked in. The linebreak option is used in // that case to split long lines after a specific column. if ($this->linebreakPosition > 0) { $l = strlen($css); $offset = $this->linebreakPosition; while (preg_match('/(?<!\\\\)\}(?!\n)/S', $css, $matches, PREG_OFFSET_CAPTURE, $offset)) { $matchIndex = $matches[0][1]; $css = substr_replace($css, "\n", $matchIndex + 1, 0); $offset = $matchIndex + 2 + $this->linebreakPosition; $l += 1; if ($offset > $l) { break; } } } // Restore preserved comments and strings $css = strtr($css, $this->preservedTokens); return trim($css); } /** * Searches & replaces all data urls with tokens before we start compressing, * to avoid performance issues running some of the subsequent regexes against large string chunks. * @param string $css * @return string */ private function processDataUrls($css) { $ret = ''; $searchOffset = $substrOffset = 0; // Since we need to account for non-base64 data urls, we need to handle // ' and ) being part of the data string. while (preg_match('/url\(\s*(["\']?)data:/Si', $css, $m, PREG_OFFSET_CAPTURE, $searchOffset)) { $matchStartIndex = $m[0][1]; $dataStartIndex = $matchStartIndex + 4; // url( length $searchOffset = $matchStartIndex + strlen($m[0][0]); $terminator = $m[1][0]; // ', " or empty (not quoted) $terminatorRegex = '/(?<!\\\\)'. (strlen($terminator) === 0 ? '' : $terminator.'\s*') .'(\))/S'; $ret .= substr($css, $substrOffset, $matchStartIndex - $substrOffset); // Terminator found if (preg_match($terminatorRegex, $css, $matches, PREG_OFFSET_CAPTURE, $searchOffset)) { $matchEndIndex = $matches[1][1]; $searchOffset = $matchEndIndex + 1; $token = substr($css, $dataStartIndex, $matchEndIndex - $dataStartIndex); // Remove all spaces only for base64 encoded URLs. if (stripos($token, 'base64,') !== false) { $token = preg_replace('/\s+/S', '', $token); } $ret .= 'url('. $this->registerPreservedToken(trim($token)) .')'; // No end terminator found, re-add the whole match. Should we throw/warn here? } else { $ret .= substr($css, $matchStartIndex, $searchOffset - $matchStartIndex); } $substrOffset = $searchOffset; } $ret .= substr($css, $substrOffset); return $ret; } /** * Registers all comments found as candidates to be preserved. * @param array $matches * @return string */ private function processCommentsCallback($matches) { return '/*'. $this->registerCommentToken($matches[1]) .'*/'; } /** * Preserves old IE Matrix string definition * @param array $matches * @return string */ private function processOldIeSpecificMatrixDefinitionCallback($matches) { return 'filter:progid:DXImageTransform.Microsoft.Matrix('. $this->registerPreservedToken($matches[1]) .')'; } /** * Preserves strings found * @param array $matches * @return string */ private function processStringsCallback($matches) { $match = $matches[0]; $quote = substr($match, 0, 1); $match = substr($match, 1, -1); // maybe the string contains a comment-like substring? // one, maybe more? put'em back then if (strpos($match, self::COMMENT_TOKEN_START) !== false) { $match = strtr($match, $this->comments); } // minify alpha opacity in filter strings $match = str_ireplace('progid:DXImageTransform.Microsoft.Alpha(Opacity=', 'alpha(opacity=', $match); return $quote . $this->registerPreservedToken($match) . $quote; } /** * Preserves or removes comments found. * @param string $css * @return string */ private function processComments($css) { foreach ($this->comments as $commentId => $comment) { $commentIdString = '/*'. $commentId .'*/'; // ! in the first position of the comment means preserve // so push to the preserved tokens keeping the ! if ($this->keepImportantComments && strpos($comment, '!') === 0) { $preservedTokenId = $this->registerPreservedToken($comment); // Put new lines before and after /*! important comments $css = str_replace($commentIdString, "\n/*$preservedTokenId*/\n", $css); continue; } // # sourceMappingURL= in the first position of the comment means sourcemap // so push to the preserved tokens if {$this->keepSourceMapComment} is truthy. if ($this->keepSourceMapComment && strpos($comment, '# sourceMappingURL=') === 0) { $preservedTokenId = $this->registerPreservedToken($comment); // Add new line before the sourcemap comment $css = str_replace($commentIdString, "\n/*$preservedTokenId*/", $css); continue; } // Keep empty comments after child selectors (IE7 hack) // e.g. html >/**/ body if (strlen($comment) === 0 && strpos($css, '>/*'.$commentId) !== false) { $css = str_replace($commentId, $this->registerPreservedToken(''), $css); continue; } // in all other cases kill the comment $css = str_replace($commentIdString, '', $css); } // Normalize whitespace again $css = preg_replace('/ +/S', ' ', $css); return $css; } /** * Finds, minifies & preserves all rule bodies. * @param string $css the whole stylesheet. * @return string */ private function processRuleBodies($css) { $ret = ''; $searchOffset = $substrOffset = 0; while (($blockStartPos = strpos($css, '{', $searchOffset)) !== false) { $blockEndPos = strpos($css, '}', $blockStartPos); if ( ! $blockEndPos ) throw new \Exception( 'CSS parse error' ) ; $nextBlockStartPos = strpos($css, '{', $blockStartPos + 1); $ret .= substr($css, $substrOffset, $blockStartPos - $substrOffset); if ($nextBlockStartPos !== false && $nextBlockStartPos < $blockEndPos) { $ret .= substr($css, $blockStartPos, $nextBlockStartPos - $blockStartPos); $searchOffset = $nextBlockStartPos; } else { $ruleBody = substr($css, $blockStartPos + 1, $blockEndPos - $blockStartPos - 1); $ruleBodyToken = $this->registerRuleBodyToken($this->processRuleBody($ruleBody)); $ret .= '{'. $ruleBodyToken .'}'; $searchOffset = $blockEndPos + 1; } $substrOffset = $searchOffset; } $ret .= substr($css, $substrOffset); return $ret; } /** * Compresses non-group rule bodies. * @param string $body The rule body without curly braces * @return string */ private function processRuleBody($body) { $body = trim($body); // Remove spaces before the things that should not have spaces before them. $body = preg_replace('/ ([:=,)*\/;\n])/S', '$1', $body); // Remove the spaces after the things that should not have spaces after them. $body = preg_replace('/([:=,(*\/!;\n]) /S', '$1', $body); // Replace multiple semi-colons in a row by a single one $body = preg_replace('/;;+/S', ';', $body); // Remove semicolon before closing brace except when: // - The last property is prefixed with a `*` (lte IE7 hack) to avoid issues on Symbian S60 3.x browsers. if (!preg_match('/\*[a-z0-9-]+:[^;]+;$/Si', $body)) { $body = rtrim($body, ';'); } // Remove important comments inside a rule body (because they make no sense here). if (strpos($body, '/*') !== false) { $body = preg_replace('/\n?\/\*[A-Z0-9_]+\*\/\n?/S', '', $body); } // Empty rule body? Exit :) if (empty($body)) { return ''; } // Shorten font-weight values $body = preg_replace( array('/(font-weight:)bold\b/Si', '/(font-weight:)normal\b/Si'), array('${1}700', '${1}400'), $body ); // Shorten background property $body = preg_replace('/(background:)(?:none|transparent)( !|;|$)/Si', '${1}0 0$2', $body); // Shorten opacity IE filter $body = str_ireplace('progid:DXImageTransform.Microsoft.Alpha(Opacity=', 'alpha(opacity=', $body); // Shorten colors from rgb(51,102,153) to #336699, rgb(100%,0%,0%) to #ff0000 (sRGB color space) // Shorten colors from hsl(0, 100%, 50%) to #ff0000 (sRGB color space) // This makes it more likely that it'll get further compressed in the next step. $body = preg_replace_callback( '/(rgb|hsl)\(([0-9,.% -]+)\)(.|$)/Si', array($this, 'shortenHslAndRgbToHexCallback'), $body ); // Shorten colors from #AABBCC to #ABC or shorter color name: // - Look for hex colors which don't have a "=" in front of them (to avoid MSIE filters) $body = preg_replace_callback( '/(?<!=)#([0-9a-f]{3,6})( |,|\)|;|$)/Si', array($this, 'shortenHexColorsCallback'), $body ); // Shorten long named colors with a shorter HEX counterpart: white -> #fff. // Run at least 2 times to cover most cases $body = preg_replace_callback( array($this->namedToHexColorsRegex, $this->namedToHexColorsRegex), array($this, 'shortenNamedColorsCallback'), $body ); // Replace positive sign from numbers before the leading space is removed. // +1.2em to 1.2em, +.8px to .8px, +2% to 2% $body = preg_replace('/([ :,(])\+(\.?\d+)/S', '$1$2', $body); // shorten ms to s $body = preg_replace_callback('/([ :,(])(-?)(\d{3,})ms/Si', function ($matches) { return $matches[1] . $matches[2] . ((int) $matches[3] / 1000) .'s'; }, $body); // Remove leading zeros from integer and float numbers. // 000.6 to .6, -0.8 to -.8, 0050 to 50, -01.05 to -1.05 $body = preg_replace('/([ :,(])(-?)0+([1-9]?\.?\d+)/S', '$1$2$3', $body); // Remove trailing zeros from float numbers. // -6.0100em to -6.01em, .0100 to .01, 1.200px to 1.2px $body = preg_replace('/([ :,(])(-?\d?\.\d+?)0+([^\d])/S', '$1$2$3', $body); // Remove trailing .0 -> -9.0 to -9 $body = preg_replace('/([ :,(])(-?\d+)\.0([^\d])/S', '$1$2$3', $body); // Replace 0 length numbers with 0 $body = preg_replace('/([ :,(])-?\.?0+([^\d])/S', '${1}0$2', $body); // Shorten zero values for safe properties only $body = preg_replace( array( $this->shortenOneZeroesRegex, $this->shortenTwoZeroesRegex, $this->shortenThreeZeroesRegex, $this->shortenFourZeroesRegex ), array( '$1$2:0', '$1$2:$3 0', '$1$2:$3 $4 0', '$1$2:$3 $4 $5 0' ), $body ); // Replace 0 0 0; or 0 0 0 0; with 0 0 for background-position property. $body = preg_replace('/(background-position):0(?: 0){2,3}( !|;|$)/Si', '$1:0 0$2', $body); // Shorten suitable shorthand properties with repeated values $body = preg_replace( array( '/(margin|padding|border-(?:width|radius)):('.$this->numRegex.')(?: \2)+( !|;|$)/Si', '/(border-(?:style|color)):([#a-z0-9]+)(?: \2)+( !|;|$)/Si' ), '$1:$2$3', $body ); $body = preg_replace( array( '/(margin|padding|border-(?:width|radius)):'. '('.$this->numRegex.') ('.$this->numRegex.') \2 \3( !|;|$)/Si', '/(border-(?:style|color)):([#a-z0-9]+) ([#a-z0-9]+) \2 \3( !|;|$)/Si' ), '$1:$2 $3$4', $body ); $body = preg_replace( array( '/(margin|padding|border-(?:width|radius)):'. '('.$this->numRegex.') ('.$this->numRegex.') ('.$this->numRegex.') \3( !|;|$)/Si', '/(border-(?:style|color)):([#a-z0-9]+) ([#a-z0-9]+) ([#a-z0-9]+) \3( !|;|$)/Si' ), '$1:$2 $3 $4$5', $body ); // Lowercase some common functions that can be values $body = preg_replace_callback( '/(?:attr|blur|brightness|circle|contrast|cubic-bezier|drop-shadow|ellipse|from|grayscale|'. 'hsla?|hue-rotate|inset|invert|local|minmax|opacity|perspective|polygon|rgba?|rect|repeat|saturate|sepia|'. 'steps|to|url|var|-webkit-gradient|'. '(?:-(?:atsc|khtml|moz|ms|o|wap|webkit)-)?(?:calc|(?:repeating-)?(?:linear|radial)-gradient))\(/Si', array($this, 'strtolowerCallback'), $body ); // Lowercase all uppercase properties $body = preg_replace_callback('/(?:^|;)[A-Z-]+:/S', array($this, 'strtolowerCallback'), $body); return $body; } /** * Compresses At-rules and selectors. * @param string $css the whole stylesheet with rule bodies tokenized. * @return string */ private function processAtRulesAndSelectors($css) { $charset = ''; $imports = ''; $namespaces = ''; // Remove spaces before the things that should not have spaces before them. $css = preg_replace('/ ([@{};>+)\]~=,\/\n])/S', '$1', $css); // Remove the spaces after the things that should not have spaces after them. $css = preg_replace('/([{}:;>+(\[~=,\/\n]) /S', '$1', $css); // Shorten shortable double colon (CSS3) pseudo-elements to single colon (CSS2) $css = preg_replace('/::(before|after|first-(?:line|letter))(\{|,)/Si', ':$1$2', $css); // Retain space for special IE6 cases $css = preg_replace_callback('/:first-(line|letter)(\{|,)/Si', function ($matches) { return ':first-'. strtolower($matches[1]) .' '. $matches[2]; }, $css); // Find a fraction that may used in some @media queries such as: (min-aspect-ratio: 1/1) // Add token to add the "/" back in later $css = preg_replace('/\(([a-z-]+):([0-9]+)\/([0-9]+)\)/Si', '($1:$2'. self::QUERY_FRACTION .'$3)', $css); // Remove empty rule blocks up to 2 levels deep. $css = preg_replace(array_fill(0, 2, '/(\{)[^{};\/\n]+\{\}/S'), '$1', $css); $css = preg_replace('/[^{};\/\n]+\{\}/S', '', $css); // Two important comments next to each other? Remove extra newline. if ($this->keepImportantComments) { $css = str_replace("\n\n", "\n", $css); } // Restore fraction $css = str_replace(self::QUERY_FRACTION, '/', $css); // Lowercase some popular @directives $css = preg_replace_callback( '/(?<!\\\\)@(?:charset|document|font-face|import|(?:-(?:atsc|khtml|moz|ms|o|wap|webkit)-)?keyframes|media|'. 'namespace|page|supports|viewport)/Si', array($this, 'strtolowerCallback'), $css ); // Lowercase some popular media types $css = preg_replace_callback( '/[ ,](?:all|aural|braille|handheld|print|projection|screen|tty|tv|embossed|speech)[ ,;{]/Si', array($this, 'strtolowerCallback'), $css ); // Lowercase some common pseudo-classes & pseudo-elements $css = preg_replace_callback( '/(?<!\\\\):(?:active|after|before|checked|default|disabled|empty|enabled|first-(?:child|of-type)|'. 'focus(?:-within)?|hover|indeterminate|in-range|invalid|lang\(|last-(?:child|of-type)|left|link|not\(|'. 'nth-(?:child|of-type)\(|nth-last-(?:child|of-type)\(|only-(?:child|of-type)|optional|out-of-range|'. 'read-(?:only|write)|required|right|root|:selection|target|valid|visited)/Si', array($this, 'strtolowerCallback'), $css ); // @charset handling if (preg_match($this->charsetRegex, $css, $matches)) { // Keep the first @charset at-rule found $charset = $matches[0]; // Delete all @charset at-rules $css = preg_replace($this->charsetRegex, '', $css); } // @import handling $css = preg_replace_callback($this->importRegex, function ($matches) use (&$imports) { // Keep all @import at-rules found for later $imports .= $matches[0]; // Delete all @import at-rules return ''; }, $css); // @namespace handling $css = preg_replace_callback($this->namespaceRegex, function ($matches) use (&$namespaces) { // Keep all @namespace at-rules found for later $namespaces .= $matches[0]; // Delete all @namespace at-rules return ''; }, $css); // Order critical at-rules: // 1. @charset first // 2. @imports below @charset // 3. @namespaces below @imports $css = $charset . $imports . $namespaces . $css; return $css; } /** * Converts hsl() & rgb() colors to HEX format. * @param $matches * @return string */ private function shortenHslAndRgbToHexCallback($matches) { $type = $matches[1]; $values = explode(',', $matches[2]); $terminator = $matches[3]; if ($type === 'hsl') { $values = Utils::hslToRgb($values); } $hexColors = Utils::rgbToHex($values); // Restore space after rgb() or hsl() function in some cases such as: // background-image: linear-gradient(to bottom, rgb(210,180,140) 10%, rgb(255,0,0) 90%); if (!empty($terminator) && !preg_match('/[ ,);]/S', $terminator)) { $terminator = ' '. $terminator; } return '#'. implode('', $hexColors) . $terminator; } /** * Compresses HEX color values of the form #AABBCC to #ABC or short color name. * @param $matches * @return string */ private function shortenHexColorsCallback($matches) { $hex = $matches[1]; // Shorten suitable 6 chars HEX colors if (strlen($hex) === 6 && preg_match('/^([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3$/Si', $hex, $m)) { $hex = $m[1] . $m[2] . $m[3]; } // Lowercase $hex = '#'. strtolower($hex); // Replace Hex colors with shorter color names $color = array_key_exists($hex, $this->hexToNamedColorsMap) ? $this->hexToNamedColorsMap[$hex] : $hex; return $color . $matches[2]; } /** * Shortens all named colors with a shorter HEX counterpart for a set of safe properties * e.g. white -> #fff * @param array $matches * @return string */ private function shortenNamedColorsCallback($matches) { return $matches[1] . $this->namedToHexColorsMap[strtolower($matches[2])] . $matches[3]; } /** * Makes a string lowercase * @param array $matches * @return string */ private function strtolowerCallback($matches) { return strtolower($matches[0]); } } utils.cls.php 0000644 00000010011 14711305703 0007167 0 ustar 00 <?php namespace LiteSpeed\Lib\CSS_MIN ; defined( 'WPINC' ) || exit ; class Utils { /** * Clamps a number between a minimum and a maximum value. * @param int|float $n the number to clamp * @param int|float $min the lower end number allowed * @param int|float $max the higher end number allowed * @return int|float */ public static function clampNumber($n, $min, $max) { return min(max($n, $min), $max); } /** * Clamps a RGB color number outside the sRGB color space * @param int|float $n the number to clamp * @return int|float */ public static function clampNumberSrgb($n) { return self::clampNumber($n, 0, 255); } /** * Converts a HSL color into a RGB color * @param array $hslValues * @return array */ public static function hslToRgb($hslValues) { $h = floatval($hslValues[0]); $s = floatval(str_replace('%', '', $hslValues[1])); $l = floatval(str_replace('%', '', $hslValues[2])); // Wrap and clamp, then fraction! $h = ((($h % 360) + 360) % 360) / 360; $s = self::clampNumber($s, 0, 100) / 100; $l = self::clampNumber($l, 0, 100) / 100; if ($s == 0) { $r = $g = $b = self::roundNumber(255 * $l); } else { $v2 = $l < 0.5 ? $l * (1 + $s) : ($l + $s) - ($s * $l); $v1 = (2 * $l) - $v2; $r = self::roundNumber(255 * self::hueToRgb($v1, $v2, $h + (1/3))); $g = self::roundNumber(255 * self::hueToRgb($v1, $v2, $h)); $b = self::roundNumber(255 * self::hueToRgb($v1, $v2, $h - (1/3))); } return array($r, $g, $b); } /** * Tests and selects the correct formula for each RGB color channel * @param $v1 * @param $v2 * @param $vh * @return mixed */ public static function hueToRgb($v1, $v2, $vh) { $vh = $vh < 0 ? $vh + 1 : ($vh > 1 ? $vh - 1 : $vh); if ($vh * 6 < 1) { return $v1 + ($v2 - $v1) * 6 * $vh; } if ($vh * 2 < 1) { return $v2; } if ($vh * 3 < 2) { return $v1 + ($v2 - $v1) * ((2 / 3) - $vh) * 6; } return $v1; } /** * Convert strings like "64M" or "30" to int values * @param mixed $size * @return int */ public static function normalizeInt($size) { if (is_string($size)) { $letter = substr($size, -1); $size = intval($size); switch ($letter) { case 'M': case 'm': return (int) $size * 1048576; case 'K': case 'k': return (int) $size * 1024; case 'G': case 'g': return (int) $size * 1073741824; } } return (int) $size; } /** * Converts a string containing and RGB percentage value into a RGB integer value i.e. '90%' -> 229.5 * @param $rgbPercentage * @return int */ public static function rgbPercentageToRgbInteger($rgbPercentage) { if (strpos($rgbPercentage, '%') !== false) { $rgbPercentage = self::roundNumber(floatval(str_replace('%', '', $rgbPercentage)) * 2.55); } return intval($rgbPercentage, 10); } /** * Converts a RGB color into a HEX color * @param array $rgbColors * @return array */ public static function rgbToHex($rgbColors) { $hexColors = array(); // Values outside the sRGB color space should be clipped (0-255) for ($i = 0, $l = count($rgbColors); $i < $l; $i++) { $hexColors[$i] = sprintf("%02x", self::clampNumberSrgb(self::rgbPercentageToRgbInteger($rgbColors[$i]))); } return $hexColors; } /** * Rounds a number to its closest integer * @param $n * @return int */ public static function roundNumber($n) { return intval(round(floatval($n)), 10); } } colors.cls.php 0000644 00000012622 14711305704 0007343 0 ustar 00 <?php namespace LiteSpeed\Lib\CSS_MIN ; defined( 'WPINC' ) || exit ; class Colors { public static function getHexToNamedMap() { // Hex colors longer than named counterpart return array( '#f0ffff' => 'azure', '#f5f5dc' => 'beige', '#ffe4c4' => 'bisque', '#a52a2a' => 'brown', '#ff7f50' => 'coral', '#ffd700' => 'gold', '#808080' => 'gray', '#008000' => 'green', '#4b0082' => 'indigo', '#fffff0' => 'ivory', '#f0e68c' => 'khaki', '#faf0e6' => 'linen', '#800000' => 'maroon', '#000080' => 'navy', '#fdf5e6' => 'oldlace', '#808000' => 'olive', '#ffa500' => 'orange', '#da70d6' => 'orchid', '#cd853f' => 'peru', '#ffc0cb' => 'pink', '#dda0dd' => 'plum', '#800080' => 'purple', '#f00' => 'red', '#fa8072' => 'salmon', '#a0522d' => 'sienna', '#c0c0c0' => 'silver', '#fffafa' => 'snow', '#d2b48c' => 'tan', '#008080' => 'teal', '#ff6347' => 'tomato', '#ee82ee' => 'violet', '#f5deb3' => 'wheat' ); } public static function getNamedToHexMap() { // Named colors longer than hex counterpart return array( 'aliceblue' => '#f0f8ff', 'antiquewhite' => '#faebd7', 'aquamarine' => '#7fffd4', 'black' => '#000', 'blanchedalmond' => '#ffebcd', 'blueviolet' => '#8a2be2', 'burlywood' => '#deb887', 'cadetblue' => '#5f9ea0', 'chartreuse' => '#7fff00', 'chocolate' => '#d2691e', 'cornflowerblue' => '#6495ed', 'cornsilk' => '#fff8dc', 'darkblue' => '#00008b', 'darkcyan' => '#008b8b', 'darkgoldenrod' => '#b8860b', 'darkgray' => '#a9a9a9', 'darkgreen' => '#006400', 'darkgrey' => '#a9a9a9', 'darkkhaki' => '#bdb76b', 'darkmagenta' => '#8b008b', 'darkolivegreen' => '#556b2f', 'darkorange' => '#ff8c00', 'darkorchid' => '#9932cc', 'darksalmon' => '#e9967a', 'darkseagreen' => '#8fbc8f', 'darkslateblue' => '#483d8b', 'darkslategray' => '#2f4f4f', 'darkslategrey' => '#2f4f4f', 'darkturquoise' => '#00ced1', 'darkviolet' => '#9400d3', 'deeppink' => '#ff1493', 'deepskyblue' => '#00bfff', 'dodgerblue' => '#1e90ff', 'firebrick' => '#b22222', 'floralwhite' => '#fffaf0', 'forestgreen' => '#228b22', 'fuchsia' => '#f0f', 'gainsboro' => '#dcdcdc', 'ghostwhite' => '#f8f8ff', 'goldenrod' => '#daa520', 'greenyellow' => '#adff2f', 'honeydew' => '#f0fff0', 'indianred' => '#cd5c5c', 'lavender' => '#e6e6fa', 'lavenderblush' => '#fff0f5', 'lawngreen' => '#7cfc00', 'lemonchiffon' => '#fffacd', 'lightblue' => '#add8e6', 'lightcoral' => '#f08080', 'lightcyan' => '#e0ffff', 'lightgoldenrodyellow' => '#fafad2', 'lightgray' => '#d3d3d3', 'lightgreen' => '#90ee90', 'lightgrey' => '#d3d3d3', 'lightpink' => '#ffb6c1', 'lightsalmon' => '#ffa07a', 'lightseagreen' => '#20b2aa', 'lightskyblue' => '#87cefa', 'lightslategray' => '#778899', 'lightslategrey' => '#778899', 'lightsteelblue' => '#b0c4de', 'lightyellow' => '#ffffe0', 'limegreen' => '#32cd32', 'mediumaquamarine' => '#66cdaa', 'mediumblue' => '#0000cd', 'mediumorchid' => '#ba55d3', 'mediumpurple' => '#9370db', 'mediumseagreen' => '#3cb371', 'mediumslateblue' => '#7b68ee', 'mediumspringgreen' => '#00fa9a', 'mediumturquoise' => '#48d1cc', 'mediumvioletred' => '#c71585', 'midnightblue' => '#191970', 'mintcream' => '#f5fffa', 'mistyrose' => '#ffe4e1', 'moccasin' => '#ffe4b5', 'navajowhite' => '#ffdead', 'olivedrab' => '#6b8e23', 'orangered' => '#ff4500', 'palegoldenrod' => '#eee8aa', 'palegreen' => '#98fb98', 'paleturquoise' => '#afeeee', 'palevioletred' => '#db7093', 'papayawhip' => '#ffefd5', 'peachpuff' => '#ffdab9', 'powderblue' => '#b0e0e6', 'rebeccapurple' => '#663399', 'rosybrown' => '#bc8f8f', 'royalblue' => '#4169e1', 'saddlebrown' => '#8b4513', 'sandybrown' => '#f4a460', 'seagreen' => '#2e8b57', 'seashell' => '#fff5ee', 'slateblue' => '#6a5acd', 'slategray' => '#708090', 'slategrey' => '#708090', 'springgreen' => '#00ff7f', 'steelblue' => '#4682b4', 'turquoise' => '#40e0d0', 'white' => '#fff', 'whitesmoke' => '#f5f5f5', 'yellow' => '#ff0', 'yellowgreen' => '#9acd32' ); } } urirewriter.cls.php 0000644 00000024135 14711305704 0010427 0 ustar 00 <?php /** * Rewrite file-relative URIs as root-relative in CSS files * * @package Minify * @author Stephen Clay <steve@mrclay.org> */ namespace LiteSpeed\Lib\CSS_MIN ; defined( 'WPINC' ) || exit ; class UriRewriter { /** * rewrite() and rewriteRelative() append debugging information here * * @var string */ public static $debugText = ''; /** * In CSS content, rewrite file relative URIs as root relative * * @param string $css * * @param string $currentDir The directory of the current CSS file. * * @param string $docRoot The document root of the web site in which * the CSS file resides (default = $_SERVER['DOCUMENT_ROOT']). * * @param array $symlinks (default = array()) If the CSS file is stored in * a symlink-ed directory, provide an array of link paths to * target paths, where the link paths are within the document root. Because * paths need to be normalized for this to work, use "//" to substitute * the doc root in the link paths (the array keys). E.g.: * <code> * array('//symlink' => '/real/target/path') // unix * array('//static' => 'D:\\staticStorage') // Windows * </code> * * @return string */ public static function rewrite($css, $currentDir, $docRoot = null, $symlinks = array()) { self::$_docRoot = self::_realpath( $docRoot ? $docRoot : $_SERVER['DOCUMENT_ROOT'] ); self::$_currentDir = self::_realpath($currentDir); self::$_symlinks = array(); // normalize symlinks in order to map to link foreach ($symlinks as $link => $target) { $link = ($link === '//') ? self::$_docRoot : str_replace('//', self::$_docRoot . '/', $link); $link = strtr($link, '/', DIRECTORY_SEPARATOR); self::$_symlinks[$link] = self::_realpath($target); } self::$debugText .= "docRoot : " . self::$_docRoot . "\n" . "currentDir : " . self::$_currentDir . "\n"; if (self::$_symlinks) { self::$debugText .= "symlinks : " . var_export(self::$_symlinks, 1) . "\n"; } self::$debugText .= "\n"; $css = self::_trimUrls($css); $css = self::_owlifySvgPaths($css); // rewrite $pattern = '/@import\\s+([\'"])(.*?)[\'"]/'; $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css); $pattern = '/url\\(\\s*([\'"](.*?)[\'"]|[^\\)\\s]+)\\s*\\)/'; $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css); $css = self::_unOwlify($css); return $css; } /** * In CSS content, prepend a path to relative URIs * * @param string $css * * @param string $path The path to prepend. * * @return string */ public static function prepend($css, $path) { self::$_prependPath = $path; $css = self::_trimUrls($css); $css = self::_owlifySvgPaths($css); // append $pattern = '/@import\\s+([\'"])(.*?)[\'"]/'; $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css); $pattern = '/url\\(\\s*([\'"](.*?)[\'"]|[^\\)\\s]+)\\s*\\)/'; $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css); $css = self::_unOwlify($css); self::$_prependPath = null; return $css; } /** * Get a root relative URI from a file relative URI * * <code> * UriRewriter::rewriteRelative( * '../img/hello.gif' * , '/home/user/www/css' // path of CSS file * , '/home/user/www' // doc root * ); * // returns '/img/hello.gif' * * // example where static files are stored in a symlinked directory * UriRewriter::rewriteRelative( * 'hello.gif' * , '/var/staticFiles/theme' * , '/home/user/www' * , array('/home/user/www/static' => '/var/staticFiles') * ); * // returns '/static/theme/hello.gif' * </code> * * @param string $uri file relative URI * * @param string $realCurrentDir realpath of the current file's directory. * * @param string $realDocRoot realpath of the site document root. * * @param array $symlinks (default = array()) If the file is stored in * a symlink-ed directory, provide an array of link paths to * real target paths, where the link paths "appear" to be within the document * root. E.g.: * <code> * array('/home/foo/www/not/real/path' => '/real/target/path') // unix * array('C:\\htdocs\\not\\real' => 'D:\\real\\target\\path') // Windows * </code> * * @return string */ public static function rewriteRelative($uri, $realCurrentDir, $realDocRoot, $symlinks = array()) { // prepend path with current dir separator (OS-independent) $path = strtr($realCurrentDir, '/', DIRECTORY_SEPARATOR); $path .= DIRECTORY_SEPARATOR . strtr($uri, '/', DIRECTORY_SEPARATOR); self::$debugText .= "file-relative URI : {$uri}\n" . "path prepended : {$path}\n"; // "unresolve" a symlink back to doc root foreach ($symlinks as $link => $target) { if (0 === strpos($path, $target)) { // replace $target with $link $path = $link . substr($path, strlen($target)); self::$debugText .= "symlink unresolved : {$path}\n"; break; } } // strip doc root $path = substr($path, strlen($realDocRoot)); self::$debugText .= "docroot stripped : {$path}\n"; // fix to root-relative URI $uri = strtr($path, '/\\', '//'); $uri = self::removeDots($uri); self::$debugText .= "traversals removed : {$uri}\n\n"; return $uri; } /** * Remove instances of "./" and "../" where possible from a root-relative URI * * @param string $uri * * @return string */ public static function removeDots($uri) { $uri = str_replace('/./', '/', $uri); // inspired by patch from Oleg Cherniy do { $uri = preg_replace('@/[^/]+/\\.\\./@', '/', $uri, 1, $changed); } while ($changed); return $uri; } /** * Get realpath with any trailing slash removed. If realpath() fails, * just remove the trailing slash. * * @param string $path * * @return mixed path with no trailing slash */ protected static function _realpath($path) { $realPath = realpath($path); if ($realPath !== false) { $path = $realPath; } return rtrim($path, '/\\'); } /** * Directory of this stylesheet * * @var string */ private static $_currentDir = ''; /** * DOC_ROOT * * @var string */ private static $_docRoot = ''; /** * directory replacements to map symlink targets back to their * source (within the document root) E.g. '/var/www/symlink' => '/var/realpath' * * @var array */ private static $_symlinks = array(); /** * Path to prepend * * @var string */ private static $_prependPath = null; /** * @param string $css * * @return string */ private static function _trimUrls($css) { $pattern = '/ url\\( # url( \\s* ([^\\)]+?) # 1 = URI (assuming does not contain ")") \\s* \\) # ) /x'; return preg_replace($pattern, 'url($1)', $css); } /** * @param array $m * * @return string */ private static function _processUriCB($m) { // $m matched either '/@import\\s+([\'"])(.*?)[\'"]/' or '/url\\(\\s*([^\\)\\s]+)\\s*\\)/' $isImport = ($m[0][0] === '@'); // determine URI and the quote character (if any) if ($isImport) { $quoteChar = $m[1]; $uri = $m[2]; } else { // $m[1] is either quoted or not $quoteChar = ($m[1][0] === "'" || $m[1][0] === '"') ? $m[1][0] : ''; $uri = ($quoteChar === '') ? $m[1] : substr($m[1], 1, strlen($m[1]) - 2); } if ($uri === '') { return $m[0]; } // if not root/scheme relative and not starts with scheme if (!preg_match('~^(/|[a-z]+\:)~', $uri)) { // URI is file-relative: rewrite depending on options if (self::$_prependPath === null) { $uri = self::rewriteRelative($uri, self::$_currentDir, self::$_docRoot, self::$_symlinks); } else { $uri = self::$_prependPath . $uri; if ($uri[0] === '/') { $root = ''; $rootRelative = $uri; $uri = $root . self::removeDots($rootRelative); } elseif (preg_match('@^((https?\:)?//([^/]+))/@', $uri, $m) && (false !== strpos($m[3], '.'))) { $root = $m[1]; $rootRelative = substr($uri, strlen($root)); $uri = $root . self::removeDots($rootRelative); } } } if ($isImport) { return "@import {$quoteChar}{$uri}{$quoteChar}"; } else { return "url({$quoteChar}{$uri}{$quoteChar})"; } } /** * Mungs some inline SVG URL declarations so they won't be touched * * @link https://github.com/mrclay/minify/issues/517 * @see _unOwlify * * @param string $css * @return string */ private static function _owlifySvgPaths($css) { $pattern = '~\b((?:clip-path|mask|-webkit-mask)\s*\:\s*)url(\(\s*#\w+\s*\))~'; return preg_replace($pattern, '$1owl$2', $css); } /** * Undo work of _owlify * * @see _owlifySvgPaths * * @param string $css * @return string */ private static function _unOwlify($css) { $pattern = '~\b((?:clip-path|mask|-webkit-mask)\s*\:\s*)owl~'; return preg_replace($pattern, '$1url', $css); } }
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