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Diffstat (limited to 'admin/survey/minify/vendor/tubalmartin/cssmin/src/Minifier.php')
| -rw-r--r-- | admin/survey/minify/vendor/tubalmartin/cssmin/src/Minifier.php | 895 |
1 files changed, 895 insertions, 0 deletions
diff --git a/admin/survey/minify/vendor/tubalmartin/cssmin/src/Minifier.php b/admin/survey/minify/vendor/tubalmartin/cssmin/src/Minifier.php new file mode 100644 index 0000000..9ec2274 --- /dev/null +++ b/admin/survey/minify/vendor/tubalmartin/cssmin/src/Minifier.php @@ -0,0 +1,895 @@ +<?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 tubalmartin\CssMin;
+
+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 import At-rules with unquoted URLs so URI reserved characters such as a semicolon may be used safely.
+ $css = preg_replace_callback(
+ '/@import url\(([^\'"]+?)\)( |;)/Si',
+ array($this, 'processImportUnquotedUrlAtRulesCallback'),
+ $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);
+
+ // Split long lines in output if required
+ $css = $this->processLongLineSplitting($css);
+
+ // 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;
+ }
+
+ /**
+ * Searches & replaces all import at-rule unquoted urls with tokens so URI reserved characters such as a semicolon
+ * may be used safely in a URL.
+ * @param array $matches
+ * @return string
+ */
+ private function processImportUnquotedUrlAtRulesCallback($matches)
+ {
+ return '@import url('. $this->registerPreservedToken($matches[1]) .')'. $matches[2];
+ }
+
+ /**
+ * 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);
+ $nextBlockStartPos = strpos($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;
+ }
+
+ /**
+ * Splits long lines after a specific column.
+ *
+ * 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.
+ *
+ * @param string $css the whole stylesheet.
+ * @return string
+ */
+ private function processLongLineSplitting($css)
+ {
+ 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;
+ }
+ }
+ }
+
+ 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]);
+ }
+}
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