diff options
| author | Dzial Techniczny WMW Projekt s.c <techniczna@wmwprojekt.pl> | 2019-12-10 11:34:53 +0100 |
|---|---|---|
| committer | Dzial Techniczny WMW Projekt s.c <techniczna@wmwprojekt.pl> | 2019-12-10 11:34:53 +0100 |
| commit | b8fa0246803dab40cf57d40b45984c53046f2d55 (patch) | |
| tree | dc92b167c7542137c385614a1d558e57669a4339 /plugins/Customizer/vendor/matthiasmullie/minify/src | |
| parent | 2a43146236fd8fb16f84398d85720ad84aa0a0b1 (diff) | |
Plugins directory and local modifications
Diffstat (limited to 'plugins/Customizer/vendor/matthiasmullie/minify/src')
7 files changed, 1878 insertions, 0 deletions
diff --git a/plugins/Customizer/vendor/matthiasmullie/minify/src/CSS.php b/plugins/Customizer/vendor/matthiasmullie/minify/src/CSS.php new file mode 100644 index 00000000..e92bb300 --- /dev/null +++ b/plugins/Customizer/vendor/matthiasmullie/minify/src/CSS.php @@ -0,0 +1,736 @@ +<?php +/** + * CSS Minifier + * + * Please report bugs on https://github.com/matthiasmullie/minify/issues + * + * @author Matthias Mullie <minify@mullie.eu> + * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved + * @license MIT License + */ + +namespace MatthiasMullie\Minify; + +use MatthiasMullie\Minify\Exceptions\FileImportException; +use MatthiasMullie\PathConverter\ConverterInterface; +use MatthiasMullie\PathConverter\Converter; + +/** + * CSS minifier + * + * Please report bugs on https://github.com/matthiasmullie/minify/issues + * + * @package Minify + * @author Matthias Mullie <minify@mullie.eu> + * @author Tijs Verkoyen <minify@verkoyen.eu> + * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved + * @license MIT License + */ +class CSS extends Minify +{ + /** + * @var int maximum inport size in kB + */ + protected $maxImportSize = 5; + + /** + * @var string[] valid import extensions + */ + protected $importExtensions = array( + 'gif' => 'data:image/gif', + 'png' => 'data:image/png', + 'jpe' => 'data:image/jpeg', + 'jpg' => 'data:image/jpeg', + 'jpeg' => 'data:image/jpeg', + 'svg' => 'data:image/svg+xml', + 'woff' => 'data:application/x-font-woff', + 'tif' => 'image/tiff', + 'tiff' => 'image/tiff', + 'xbm' => 'image/x-xbitmap', + ); + + /** + * Set the maximum size if files to be imported. + * + * Files larger than this size (in kB) will not be imported into the CSS. + * Importing files into the CSS as data-uri will save you some connections, + * but we should only import relatively small decorative images so that our + * CSS file doesn't get too bulky. + * + * @param int $size Size in kB + */ + public function setMaxImportSize($size) + { + $this->maxImportSize = $size; + } + + /** + * Set the type of extensions to be imported into the CSS (to save network + * connections). + * Keys of the array should be the file extensions & respective values + * should be the data type. + * + * @param string[] $extensions Array of file extensions + */ + public function setImportExtensions(array $extensions) + { + $this->importExtensions = $extensions; + } + + /** + * Move any import statements to the top. + * + * @param string $content Nearly finished CSS content + * + * @return string + */ + protected function moveImportsToTop($content) + { + if (preg_match_all('/(;?)(@import (?<url>url\()?(?P<quotes>["\']?).+?(?P=quotes)(?(url)\)));?/', $content, $matches)) { + // remove from content + foreach ($matches[0] as $import) { + $content = str_replace($import, '', $content); + } + + // add to top + $content = implode(';', $matches[2]).';'.trim($content, ';'); + } + + return $content; + } + + /** + * Combine CSS from import statements. + * + * @import's will be loaded and their content merged into the original file, + * to save HTTP requests. + * + * @param string $source The file to combine imports for + * @param string $content The CSS content to combine imports for + * @param string[] $parents Parent paths, for circular reference checks + * + * @return string + * + * @throws FileImportException + */ + protected function combineImports($source, $content, $parents) + { + $importRegexes = array( + // @import url(xxx) + '/ + # import statement + @import + + # whitespace + \s+ + + # open url() + url\( + + # (optional) open path enclosure + (?P<quotes>["\']?) + + # fetch path + (?P<path>.+?) + + # (optional) close path enclosure + (?P=quotes) + + # close url() + \) + + # (optional) trailing whitespace + \s* + + # (optional) media statement(s) + (?P<media>[^;]*) + + # (optional) trailing whitespace + \s* + + # (optional) closing semi-colon + ;? + + /ix', + + // @import 'xxx' + '/ + + # import statement + @import + + # whitespace + \s+ + + # open path enclosure + (?P<quotes>["\']) + + # fetch path + (?P<path>.+?) + + # close path enclosure + (?P=quotes) + + # (optional) trailing whitespace + \s* + + # (optional) media statement(s) + (?P<media>[^;]*) + + # (optional) trailing whitespace + \s* + + # (optional) closing semi-colon + ;? + + /ix', + ); + + // find all relative imports in css + $matches = array(); + foreach ($importRegexes as $importRegex) { + if (preg_match_all($importRegex, $content, $regexMatches, PREG_SET_ORDER)) { + $matches = array_merge($matches, $regexMatches); + } + } + + $search = array(); + $replace = array(); + + // loop the matches + foreach ($matches as $match) { + // get the path for the file that will be imported + $importPath = dirname($source).'/'.$match['path']; + + // only replace the import with the content if we can grab the + // content of the file + if (!$this->canImportByPath($match['path']) || !$this->canImportFile($importPath)) { + continue; + } + + // check if current file was not imported previously in the same + // import chain. + if (in_array($importPath, $parents)) { + throw new FileImportException('Failed to import file "'.$importPath.'": circular reference detected.'); + } + + // grab referenced file & minify it (which may include importing + // yet other @import statements recursively) + $minifier = new static($importPath); + $importContent = $minifier->execute($source, $parents); + + // check if this is only valid for certain media + if (!empty($match['media'])) { + $importContent = '@media '.$match['media'].'{'.$importContent.'}'; + } + + // add to replacement array + $search[] = $match[0]; + $replace[] = $importContent; + } + + // replace the import statements + return str_replace($search, $replace, $content); + } + + /** + * Import files into the CSS, base64-ized. + * + * @url(image.jpg) images will be loaded and their content merged into the + * original file, to save HTTP requests. + * + * @param string $source The file to import files for + * @param string $content The CSS content to import files for + * + * @return string + */ + protected function importFiles($source, $content) + { + $regex = '/url\((["\']?)(.+?)\\1\)/i'; + if ($this->importExtensions && preg_match_all($regex, $content, $matches, PREG_SET_ORDER)) { + $search = array(); + $replace = array(); + + // loop the matches + foreach ($matches as $match) { + $extension = substr(strrchr($match[2], '.'), 1); + if ($extension && !array_key_exists($extension, $this->importExtensions)) { + continue; + } + + // get the path for the file that will be imported + $path = $match[2]; + $path = dirname($source).'/'.$path; + + // only replace the import with the content if we're able to get + // the content of the file, and it's relatively small + if ($this->canImportFile($path) && $this->canImportBySize($path)) { + // grab content && base64-ize + $importContent = $this->load($path); + $importContent = base64_encode($importContent); + + // build replacement + $search[] = $match[0]; + $replace[] = 'url('.$this->importExtensions[$extension].';base64,'.$importContent.')'; + } + } + + // replace the import statements + $content = str_replace($search, $replace, $content); + } + + return $content; + } + + /** + * Minify the data. + * Perform CSS optimizations. + * + * @param string[optional] $path Path to write the data to + * @param string[] $parents Parent paths, for circular reference checks + * + * @return string The minified data + */ + public function execute($path = null, $parents = array()) + { + $content = ''; + + // loop CSS data (raw data and files) + foreach ($this->data as $source => $css) { + /* + * Let's first take out strings & comments, since we can't just + * remove whitespace anywhere. If whitespace occurs inside a string, + * we should leave it alone. E.g.: + * p { content: "a test" } + */ + $this->extractStrings(); + $this->stripComments(); + $css = $this->replace($css); + + $css = $this->stripWhitespace($css); + $css = $this->shortenHex($css); + $css = $this->shortenZeroes($css); + $css = $this->shortenFontWeights($css); + $css = $this->stripEmptyTags($css); + + // restore the string we've extracted earlier + $css = $this->restoreExtractedData($css); + + $source = is_int($source) ? '' : $source; + $parents = $source ? array_merge($parents, array($source)) : $parents; + $css = $this->combineImports($source, $css, $parents); + $css = $this->importFiles($source, $css); + + /* + * If we'll save to a new path, we'll have to fix the relative paths + * to be relative no longer to the source file, but to the new path. + * If we don't write to a file, fall back to same path so no + * conversion happens (because we still want it to go through most + * of the move code, which also addresses url() & @import syntax...) + */ + $converter = $this->getPathConverter($source, $path ?: $source); + $css = $this->move($converter, $css); + + // combine css + $content .= $css; + } + + $content = $this->moveImportsToTop($content); + + return $content; + } + + /** + * Moving a css file should update all relative urls. + * Relative references (e.g. ../images/image.gif) in a certain css file, + * will have to be updated when a file is being saved at another location + * (e.g. ../../images/image.gif, if the new CSS file is 1 folder deeper). + * + * @param ConverterInterface $converter Relative path converter + * @param string $content The CSS content to update relative urls for + * + * @return string + */ + protected function move(ConverterInterface $converter, $content) + { + /* + * Relative path references will usually be enclosed by url(). @import + * is an exception, where url() is not necessary around the path (but is + * allowed). + * This *could* be 1 regular expression, where both regular expressions + * in this array are on different sides of a |. But we're using named + * patterns in both regexes, the same name on both regexes. This is only + * possible with a (?J) modifier, but that only works after a fairly + * recent PCRE version. That's why I'm doing 2 separate regular + * expressions & combining the matches after executing of both. + */ + $relativeRegexes = array( + // url(xxx) + '/ + # open url() + url\( + + \s* + + # open path enclosure + (?P<quotes>["\'])? + + # fetch path + (?P<path>.+?) + + # close path enclosure + (?(quotes)(?P=quotes)) + + \s* + + # close url() + \) + + /ix', + + // @import "xxx" + '/ + # import statement + @import + + # whitespace + \s+ + + # we don\'t have to check for @import url(), because the + # condition above will already catch these + + # open path enclosure + (?P<quotes>["\']) + + # fetch path + (?P<path>.+?) + + # close path enclosure + (?P=quotes) + + /ix', + ); + + // find all relative urls in css + $matches = array(); + foreach ($relativeRegexes as $relativeRegex) { + if (preg_match_all($relativeRegex, $content, $regexMatches, PREG_SET_ORDER)) { + $matches = array_merge($matches, $regexMatches); + } + } + + $search = array(); + $replace = array(); + + // loop all urls + foreach ($matches as $match) { + // determine if it's a url() or an @import match + $type = (strpos($match[0], '@import') === 0 ? 'import' : 'url'); + + $url = $match['path']; + if ($this->canImportByPath($url)) { + // attempting to interpret GET-params makes no sense, so let's discard them for awhile + $params = strrchr($url, '?'); + $url = $params ? substr($url, 0, -strlen($params)) : $url; + + // fix relative url + $url = $converter->convert($url); + + // now that the path has been converted, re-apply GET-params + $url .= $params; + } + + /* + * Urls with control characters above 0x7e should be quoted. + * According to Mozilla's parser, whitespace is only allowed at the + * end of unquoted urls. + * Urls with `)` (as could happen with data: uris) should also be + * quoted to avoid being confused for the url() closing parentheses. + * And urls with a # have also been reported to cause issues. + * Urls with quotes inside should also remain escaped. + * + * @see https://developer.mozilla.org/nl/docs/Web/CSS/url#The_url()_functional_notation + * @see https://hg.mozilla.org/mozilla-central/rev/14abca4e7378 + * @see https://github.com/matthiasmullie/minify/issues/193 + */ + $url = trim($url); + if (preg_match('/[\s\)\'"#\x{7f}-\x{9f}]/u', $url)) { + $url = $match['quotes'] . $url . $match['quotes']; + } + + // build replacement + $search[] = $match[0]; + if ($type === 'url') { + $replace[] = 'url('.$url.')'; + } elseif ($type === 'import') { + $replace[] = '@import "'.$url.'"'; + } + } + + // replace urls + return str_replace($search, $replace, $content); + } + + /** + * Shorthand hex color codes. + * #FF0000 -> #F00. + * + * @param string $content The CSS content to shorten the hex color codes for + * + * @return string + */ + protected function shortenHex($content) + { + $content = preg_replace('/(?<=[: ])#([0-9a-z])\\1([0-9a-z])\\2([0-9a-z])\\3(?=[; }])/i', '#$1$2$3', $content); + + // we can shorten some even more by replacing them with their color name + $colors = array( + '#F0FFFF' => 'azure', + '#F5F5DC' => 'beige', + '#A52A2A' => 'brown', + '#FF7F50' => 'coral', + '#FFD700' => 'gold', + '#808080' => 'gray', + '#008000' => 'green', + '#4B0082' => 'indigo', + '#FFFFF0' => 'ivory', + '#F0E68C' => 'khaki', + '#FAF0E6' => 'linen', + '#800000' => 'maroon', + '#000080' => 'navy', + '#808000' => 'olive', + '#CD853F' => 'peru', + '#FFC0CB' => 'pink', + '#DDA0DD' => 'plum', + '#800080' => 'purple', + '#F00' => 'red', + '#FA8072' => 'salmon', + '#A0522D' => 'sienna', + '#C0C0C0' => 'silver', + '#FFFAFA' => 'snow', + '#D2B48C' => 'tan', + '#FF6347' => 'tomato', + '#EE82EE' => 'violet', + '#F5DEB3' => 'wheat', + ); + + return preg_replace_callback( + '/(?<=[: ])('.implode(array_keys($colors), '|').')(?=[; }])/i', + function ($match) use ($colors) { + return $colors[strtoupper($match[0])]; + }, + $content + ); + } + + /** + * Shorten CSS font weights. + * + * @param string $content The CSS content to shorten the font weights for + * + * @return string + */ + protected function shortenFontWeights($content) + { + $weights = array( + 'normal' => 400, + 'bold' => 700, + ); + + $callback = function ($match) use ($weights) { + return $match[1].$weights[$match[2]]; + }; + + return preg_replace_callback('/(font-weight\s*:\s*)('.implode('|', array_keys($weights)).')(?=[;}])/', $callback, $content); + } + + /** + * Shorthand 0 values to plain 0, instead of e.g. -0em. + * + * @param string $content The CSS content to shorten the zero values for + * + * @return string + */ + protected function shortenZeroes($content) + { + // we don't want to strip units in `calc()` expressions: + // `5px - 0px` is valid, but `5px - 0` is not + // `10px * 0` is valid (equates to 0), and so is `10 * 0px`, but + // `10 * 0` is invalid + // best to just leave `calc()`s alone, even if they could be optimized + // (which is a whole other undertaking, where units & order of + // operations all need to be considered...) + $calcs = $this->findCalcs($content); + $content = str_replace($calcs, array_keys($calcs), $content); + + // reusable bits of code throughout these regexes: + // before & after are used to make sure we don't match lose unintended + // 0-like values (e.g. in #000, or in http://url/1.0) + // units can be stripped from 0 values, or used to recognize non 0 + // values (where wa may be able to strip a .0 suffix) + $before = '(?<=[:(, ])'; + $after = '(?=[ ,);}])'; + $units = '(em|ex|%|px|cm|mm|in|pt|pc|ch|rem|vh|vw|vmin|vmax|vm)'; + + // strip units after zeroes (0px -> 0) + // NOTE: it should be safe to remove all units for a 0 value, but in + // practice, Webkit (especially Safari) seems to stumble over at least + // 0%, potentially other units as well. Only stripping 'px' for now. + // @see https://github.com/matthiasmullie/minify/issues/60 + $content = preg_replace('/'.$before.'(-?0*(\.0+)?)(?<=0)px'.$after.'/', '\\1', $content); + + // strip 0-digits (.0 -> 0) + $content = preg_replace('/'.$before.'\.0+'.$units.'?'.$after.'/', '0\\1', $content); + // strip trailing 0: 50.10 -> 50.1, 50.10px -> 50.1px + $content = preg_replace('/'.$before.'(-?[0-9]+\.[0-9]+)0+'.$units.'?'.$after.'/', '\\1\\2', $content); + // strip trailing 0: 50.00 -> 50, 50.00px -> 50px + $content = preg_replace('/'.$before.'(-?[0-9]+)\.0+'.$units.'?'.$after.'/', '\\1\\2', $content); + // strip leading 0: 0.1 -> .1, 01.1 -> 1.1 + $content = preg_replace('/'.$before.'(-?)0+([0-9]*\.[0-9]+)'.$units.'?'.$after.'/', '\\1\\2\\3', $content); + + // strip negative zeroes (-0 -> 0) & truncate zeroes (00 -> 0) + $content = preg_replace('/'.$before.'-?0+'.$units.'?'.$after.'/', '0\\1', $content); + + // IE doesn't seem to understand a unitless flex-basis value (correct - + // it goes against the spec), so let's add it in again (make it `%`, + // which is only 1 char: 0%, 0px, 0 anything, it's all just the same) + // @see https://developer.mozilla.org/nl/docs/Web/CSS/flex + $content = preg_replace('/flex:([0-9]+\s[0-9]+\s)0([;\}])/', 'flex:${1}0%${2}', $content); + $content = preg_replace('/flex-basis:0([;\}])/', 'flex-basis:0%${1}', $content); + + // restore `calc()` expressions + $content = str_replace(array_keys($calcs), $calcs, $content); + + return $content; + } + + /** + * Strip empty tags from source code. + * + * @param string $content + * + * @return string + */ + protected function stripEmptyTags($content) + { + $content = preg_replace('/(?<=^)[^\{\};]+\{\s*\}/', '', $content); + $content = preg_replace('/(?<=(\}|;))[^\{\};]+\{\s*\}/', '', $content); + + return $content; + } + + /** + * Strip comments from source code. + */ + protected function stripComments() + { + $this->registerPattern('/\/\*.*?\*\//s', ''); + } + + /** + * Strip whitespace. + * + * @param string $content The CSS content to strip the whitespace for + * + * @return string + */ + protected function stripWhitespace($content) + { + // remove leading & trailing whitespace + $content = preg_replace('/^\s*/m', '', $content); + $content = preg_replace('/\s*$/m', '', $content); + + // replace newlines with a single space + $content = preg_replace('/\s+/', ' ', $content); + + // remove whitespace around meta characters + // inspired by stackoverflow.com/questions/15195750/minify-compress-css-with-regex + $content = preg_replace('/\s*([\*$~^|]?+=|[{};,>~]|!important\b)\s*/', '$1', $content); + $content = preg_replace('/([\[(:])\s+/', '$1', $content); + $content = preg_replace('/\s+([\]\)])/', '$1', $content); + $content = preg_replace('/\s+(:)(?![^\}]*\{)/', '$1', $content); + + // whitespace around + and - can only be stripped inside some pseudo- + // classes, like `:nth-child(3+2n)` + // not in things like `calc(3px + 2px)`, shorthands like `3px -2px`, or + // selectors like `div.weird- p` + $pseudos = array('nth-child', 'nth-last-child', 'nth-last-of-type', 'nth-of-type'); + $content = preg_replace('/:('.implode('|', $pseudos).')\(\s*([+-]?)\s*(.+?)\s*([+-]?)\s*(.*?)\s*\)/', ':$1($2$3$4$5)', $content); + + // remove semicolon/whitespace followed by closing bracket + $content = str_replace(';}', '}', $content); + + return trim($content); + } + + /** + * Find all `calc()` occurrences. + * + * @param string $content The CSS content to find `calc()`s in. + * + * @return string[] + */ + protected function findCalcs($content) + { + $results = array(); + preg_match_all('/calc(\(.+?)(?=$|;|calc\()/', $content, $matches, PREG_SET_ORDER); + + foreach ($matches as $match) { + $length = strlen($match[1]); + $expr = ''; + $opened = 0; + + for ($i = 0; $i < $length; $i++) { + $char = $match[1][$i]; + $expr .= $char; + if ($char === '(') { + $opened++; + } elseif ($char === ')' && --$opened === 0) { + break; + } + } + + $results['calc('.count($results).')'] = 'calc'.$expr; + } + + return $results; + } + + /** + * Check if file is small enough to be imported. + * + * @param string $path The path to the file + * + * @return bool + */ + protected function canImportBySize($path) + { + return ($size = @filesize($path)) && $size <= $this->maxImportSize * 1024; + } + + /** + * Check if file a file can be imported, going by the path. + * + * @param string $path + * + * @return bool + */ + protected function canImportByPath($path) + { + return preg_match('/^(data:|https?:|\\/)/', $path) === 0; + } + + /** + * Return a converter to update relative paths to be relative to the new + * destination. + * + * @param string $source + * @param string $target + * + * @return ConverterInterface + */ + protected function getPathConverter($source, $target) + { + return new Converter($source, $target); + } +} diff --git a/plugins/Customizer/vendor/matthiasmullie/minify/src/Exception.php b/plugins/Customizer/vendor/matthiasmullie/minify/src/Exception.php new file mode 100644 index 00000000..d03898f0 --- /dev/null +++ b/plugins/Customizer/vendor/matthiasmullie/minify/src/Exception.php @@ -0,0 +1,20 @@ +<?php +/** + * Base Exception + * + * @deprecated Use Exceptions\BasicException instead + * + * @author Matthias Mullie <minify@mullie.eu> + */ +namespace MatthiasMullie\Minify; + +/** + * Base Exception Class + * @deprecated Use Exceptions\BasicException instead + * + * @package Minify + * @author Matthias Mullie <minify@mullie.eu> + */ +abstract class Exception extends \Exception +{ +} diff --git a/plugins/Customizer/vendor/matthiasmullie/minify/src/Exceptions/BasicException.php b/plugins/Customizer/vendor/matthiasmullie/minify/src/Exceptions/BasicException.php new file mode 100644 index 00000000..af5e81bc --- /dev/null +++ b/plugins/Customizer/vendor/matthiasmullie/minify/src/Exceptions/BasicException.php @@ -0,0 +1,23 @@ +<?php +/** + * Basic exception + * + * Please report bugs on https://github.com/matthiasmullie/minify/issues + * + * @author Matthias Mullie <minify@mullie.eu> + * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved + * @license MIT License + */ +namespace MatthiasMullie\Minify\Exceptions; + +use MatthiasMullie\Minify\Exception; + +/** + * Basic Exception Class + * + * @package Minify\Exception + * @author Matthias Mullie <minify@mullie.eu> + */ +abstract class BasicException extends Exception +{ +} diff --git a/plugins/Customizer/vendor/matthiasmullie/minify/src/Exceptions/FileImportException.php b/plugins/Customizer/vendor/matthiasmullie/minify/src/Exceptions/FileImportException.php new file mode 100644 index 00000000..912a2c90 --- /dev/null +++ b/plugins/Customizer/vendor/matthiasmullie/minify/src/Exceptions/FileImportException.php @@ -0,0 +1,21 @@ +<?php +/** + * File Import Exception + * + * Please report bugs on https://github.com/matthiasmullie/minify/issues + * + * @author Matthias Mullie <minify@mullie.eu> + * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved + * @license MIT License + */ +namespace MatthiasMullie\Minify\Exceptions; + +/** + * File Import Exception Class + * + * @package Minify\Exception + * @author Matthias Mullie <minify@mullie.eu> + */ +class FileImportException extends BasicException +{ +} diff --git a/plugins/Customizer/vendor/matthiasmullie/minify/src/Exceptions/IOException.php b/plugins/Customizer/vendor/matthiasmullie/minify/src/Exceptions/IOException.php new file mode 100644 index 00000000..b172eb48 --- /dev/null +++ b/plugins/Customizer/vendor/matthiasmullie/minify/src/Exceptions/IOException.php @@ -0,0 +1,21 @@ +<?php +/** + * IO Exception + * + * Please report bugs on https://github.com/matthiasmullie/minify/issues + * + * @author Matthias Mullie <minify@mullie.eu> + * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved + * @license MIT License + */ +namespace MatthiasMullie\Minify\Exceptions; + +/** + * IO Exception Class + * + * @package Minify\Exception + * @author Matthias Mullie <minify@mullie.eu> + */ +class IOException extends BasicException +{ +} diff --git a/plugins/Customizer/vendor/matthiasmullie/minify/src/JS.php b/plugins/Customizer/vendor/matthiasmullie/minify/src/JS.php new file mode 100644 index 00000000..361afe35 --- /dev/null +++ b/plugins/Customizer/vendor/matthiasmullie/minify/src/JS.php @@ -0,0 +1,598 @@ +<?php +/** + * JavaScript minifier + * + * Please report bugs on https://github.com/matthiasmullie/minify/issues + * + * @author Matthias Mullie <minify@mullie.eu> + * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved + * @license MIT License + */ +namespace MatthiasMullie\Minify; + +/** + * JavaScript Minifier Class + * + * Please report bugs on https://github.com/matthiasmullie/minify/issues + * + * @package Minify + * @author Matthias Mullie <minify@mullie.eu> + * @author Tijs Verkoyen <minify@verkoyen.eu> + * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved + * @license MIT License + */ +class JS extends Minify +{ + /** + * Var-matching regex based on http://stackoverflow.com/a/9337047/802993. + * + * Note that regular expressions using that bit must have the PCRE_UTF8 + * pattern modifier (/u) set. + * + * @var string + */ + const REGEX_VARIABLE = 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+ + /** + * Full list of JavaScript reserved words. + * Will be loaded from /data/js/keywords_reserved.txt. + * + * @see https://mathiasbynens.be/notes/reserved-keywords + * + * @var string[] + */ + protected $keywordsReserved = array(); + + /** + * List of JavaScript reserved words that accept a <variable, value, ...> + * after them. Some end of lines are not the end of a statement, like with + * these keywords. + * + * E.g.: we shouldn't insert a ; after this else + * else + * console.log('this is quite fine') + * + * Will be loaded from /data/js/keywords_before.txt + * + * @var string[] + */ + protected $keywordsBefore = array(); + + /** + * List of JavaScript reserved words that accept a <variable, value, ...> + * before them. Some end of lines are not the end of a statement, like when + * continued by one of these keywords on the newline. + * + * E.g.: we shouldn't insert a ; before this instanceof + * variable + * instanceof String + * + * Will be loaded from /data/js/keywords_after.txt + * + * @var string[] + */ + protected $keywordsAfter = array(); + + /** + * List of all JavaScript operators. + * + * Will be loaded from /data/js/operators.txt + * + * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators + * + * @var string[] + */ + protected $operators = array(); + + /** + * List of JavaScript operators that accept a <variable, value, ...> after + * them. Some end of lines are not the end of a statement, like with these + * operators. + * + * Note: Most operators are fine, we've only removed ++ and --. + * ++ & -- have to be joined with the value they're in-/decrementing. + * + * Will be loaded from /data/js/operators_before.txt + * + * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators + * + * @var string[] + */ + protected $operatorsBefore = array(); + + /** + * List of JavaScript operators that accept a <variable, value, ...> before + * them. Some end of lines are not the end of a statement, like when + * continued by one of these operators on the newline. + * + * Note: Most operators are fine, we've only removed ), ], ++, --, ! and ~. + * There can't be a newline separating ! or ~ and whatever it is negating. + * ++ & -- have to be joined with the value they're in-/decrementing. + * ) & ] are "special" in that they have lots or usecases. () for example + * is used for function calls, for grouping, in if () and for (), ... + * + * Will be loaded from /data/js/operators_after.txt + * + * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators + * + * @var string[] + */ + protected $operatorsAfter = array(); + + /** + * {@inheritdoc} + */ + public function __construct() + { + call_user_func_array(array('parent', '__construct'), func_get_args()); + + $dataDir = __DIR__.'/../data/js/'; + $options = FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES; + $this->keywordsReserved = file($dataDir.'keywords_reserved.txt', $options); + $this->keywordsBefore = file($dataDir.'keywords_before.txt', $options); + $this->keywordsAfter = file($dataDir.'keywords_after.txt', $options); + $this->operators = file($dataDir.'operators.txt', $options); + $this->operatorsBefore = file($dataDir.'operators_before.txt', $options); + $this->operatorsAfter = file($dataDir.'operators_after.txt', $options); + } + + /** + * Minify the data. + * Perform JS optimizations. + * + * @param string[optional] $path Path to write the data to + * + * @return string The minified data + */ + public function execute($path = null) + { + $content = ''; + + /* + * Let's first take out strings, comments and regular expressions. + * All of these can contain JS code-like characters, and we should make + * sure any further magic ignores anything inside of these. + * + * Consider this example, where we should not strip any whitespace: + * var str = "a test"; + * + * Comments will be removed altogether, strings and regular expressions + * will be replaced by placeholder text, which we'll restore later. + */ + $this->extractStrings('\'"`'); + $this->stripComments(); + $this->extractRegex(); + + // loop files + foreach ($this->data as $source => $js) { + // take out strings, comments & regex (for which we've registered + // the regexes just a few lines earlier) + $js = $this->replace($js); + + $js = $this->propertyNotation($js); + $js = $this->shortenBools($js); + $js = $this->stripWhitespace($js); + + // combine js: separating the scripts by a ; + $content .= $js.";"; + } + + // clean up leftover `;`s from the combination of multiple scripts + $content = ltrim($content, ';'); + $content = (string) substr($content, 0, -1); + + /* + * Earlier, we extracted strings & regular expressions and replaced them + * with placeholder text. This will restore them. + */ + $content = $this->restoreExtractedData($content); + + return $content; + } + + /** + * Strip comments from source code. + */ + protected function stripComments() + { + // single-line comments + $this->registerPattern('/\/\/.*$/m', ''); + + // multi-line comments + $this->registerPattern('/\/\*.*?\*\//s', ''); + } + + /** + * JS can have /-delimited regular expressions, like: /ab+c/.match(string). + * + * The content inside the regex can contain characters that may be confused + * for JS code: e.g. it could contain whitespace it needs to match & we + * don't want to strip whitespace in there. + * + * The regex can be pretty simple: we don't have to care about comments, + * (which also use slashes) because stripComments() will have stripped those + * already. + * + * This method will replace all string content with simple REGEX# + * placeholder text, so we've rid all regular expressions from characters + * that may be misinterpreted. Original regex content will be saved in + * $this->extracted and after doing all other minifying, we can restore the + * original content via restoreRegex() + */ + protected function extractRegex() + { + // PHP only supports $this inside anonymous functions since 5.4 + $minifier = $this; + $callback = function ($match) use ($minifier) { + $count = count($minifier->extracted); + $placeholder = '"'.$count.'"'; + $minifier->extracted[$placeholder] = $match[0]; + + return $placeholder; + }; + + // match all chars except `/` and `\` + // `\` is allowed though, along with whatever char follows (which is the + // one being escaped) + // this should allow all chars, except for an unescaped `/` (= the one + // closing the regex) + // then also ignore bare `/` inside `[]`, where they don't need to be + // escaped: anything inside `[]` can be ignored safely + $pattern = '\\/(?:[^\\[\\/\\\\\n\r]+|(?:\\\\.)+|(?:\\[(?:[^\\]\\\\\n\r]+|(?:\\\\.)+)+\\])+)++\\/[gimuy]*'; + + // a regular expression can only be followed by a few operators or some + // of the RegExp methods (a `\` followed by a variable or value is + // likely part of a division, not a regex) + $keywords = array('do', 'in', 'new', 'else', 'throw', 'yield', 'delete', 'return', 'typeof'); + $before = '([=:,;\+\-\*\/\}\(\{\[&\|!]|^|'.implode('|', $keywords).')\s*'; + $propertiesAndMethods = array( + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp#Properties_2 + 'constructor', + 'flags', + 'global', + 'ignoreCase', + 'multiline', + 'source', + 'sticky', + 'unicode', + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp#Methods_2 + 'compile(', + 'exec(', + 'test(', + 'toSource(', + 'toString(', + ); + $delimiters = array_fill(0, count($propertiesAndMethods), '/'); + $propertiesAndMethods = array_map('preg_quote', $propertiesAndMethods, $delimiters); + $after = '(?=\s*([\.,;\)\}&\|+]|\/\/|$|\.('.implode('|', $propertiesAndMethods).')))'; + $this->registerPattern('/'.$before.'\K'.$pattern.$after.'/', $callback); + + // regular expressions following a `)` are rather annoying to detect... + // quite often, `/` after `)` is a division operator & if it happens to + // be followed by another one (or a comment), it is likely to be + // confused for a regular expression + // however, it's perfectly possible for a regex to follow a `)`: after + // a single-line `if()`, `while()`, ... statement, for example + // since, when they occur like that, they're always the start of a + // statement, there's only a limited amount of ways they can be useful: + // by calling the regex methods directly + // if a regex following `)` is not followed by `.<property or method>`, + // it's quite likely not a regex + $before = '\)\s*'; + $after = '(?=\s*\.('.implode('|', $propertiesAndMethods).'))'; + $this->registerPattern('/'.$before.'\K'.$pattern.$after.'/', $callback); + + // 1 more edge case: a regex can be followed by a lot more operators or + // keywords if there's a newline (ASI) in between, where the operator + // actually starts a new statement + // (https://github.com/matthiasmullie/minify/issues/56) + $operators = $this->getOperatorsForRegex($this->operatorsBefore, '/'); + $operators += $this->getOperatorsForRegex($this->keywordsReserved, '/'); + $after = '(?=\s*\n\s*('.implode('|', $operators).'))'; + $this->registerPattern('/'.$pattern.$after.'/', $callback); + } + + /** + * Strip whitespace. + * + * We won't strip *all* whitespace, but as much as possible. The thing that + * we'll preserve are newlines we're unsure about. + * JavaScript doesn't require statements to be terminated with a semicolon. + * It will automatically fix missing semicolons with ASI (automatic semi- + * colon insertion) at the end of line causing errors (without semicolon.) + * + * Because it's sometimes hard to tell if a newline is part of a statement + * that should be terminated or not, we'll just leave some of them alone. + * + * @param string $content The content to strip the whitespace for + * + * @return string + */ + protected function stripWhitespace($content) + { + // uniform line endings, make them all line feed + $content = str_replace(array("\r\n", "\r"), "\n", $content); + + // collapse all non-line feed whitespace into a single space + $content = preg_replace('/[^\S\n]+/', ' ', $content); + + // strip leading & trailing whitespace + $content = str_replace(array(" \n", "\n "), "\n", $content); + + // collapse consecutive line feeds into just 1 + $content = preg_replace('/\n+/', "\n", $content); + + $operatorsBefore = $this->getOperatorsForRegex($this->operatorsBefore, '/'); + $operatorsAfter = $this->getOperatorsForRegex($this->operatorsAfter, '/'); + $operators = $this->getOperatorsForRegex($this->operators, '/'); + $keywordsBefore = $this->getKeywordsForRegex($this->keywordsBefore, '/'); + $keywordsAfter = $this->getKeywordsForRegex($this->keywordsAfter, '/'); + + // strip whitespace that ends in (or next line begin with) an operator + // that allows statements to be broken up over multiple lines + unset($operatorsBefore['+'], $operatorsBefore['-'], $operatorsAfter['+'], $operatorsAfter['-']); + $content = preg_replace( + array( + '/('.implode('|', $operatorsBefore).')\s+/', + '/\s+('.implode('|', $operatorsAfter).')/', + ), '\\1', $content + ); + + // make sure + and - can't be mistaken for, or joined into ++ and -- + $content = preg_replace( + array( + '/(?<![\+\-])\s*([\+\-])(?![\+\-])/', + '/(?<![\+\-])([\+\-])\s*(?![\+\-])/', + ), '\\1', $content + ); + + // collapse whitespace around reserved words into single space + $content = preg_replace('/(^|[;\}\s])\K('.implode('|', $keywordsBefore).')\s+/', '\\2 ', $content); + $content = preg_replace('/\s+('.implode('|', $keywordsAfter).')(?=([;\{\s]|$))/', ' \\1', $content); + + /* + * We didn't strip whitespace after a couple of operators because they + * could be used in different contexts and we can't be sure it's ok to + * strip the newlines. However, we can safely strip any non-line feed + * whitespace that follows them. + */ + $operatorsDiffBefore = array_diff($operators, $operatorsBefore); + $operatorsDiffAfter = array_diff($operators, $operatorsAfter); + $content = preg_replace('/('.implode('|', $operatorsDiffBefore).')[^\S\n]+/', '\\1', $content); + $content = preg_replace('/[^\S\n]+('.implode('|', $operatorsDiffAfter).')/', '\\1', $content); + + /* + * Whitespace after `return` can be omitted in a few occasions + * (such as when followed by a string or regex) + * Same for whitespace in between `)` and `{`, or between `{` and some + * keywords. + */ + $content = preg_replace('/\breturn\s+(["\'\/\+\-])/', 'return$1', $content); + $content = preg_replace('/\)\s+\{/', '){', $content); + $content = preg_replace('/}\n(else|catch|finally)\b/', '}$1', $content); + + /* + * Get rid of double semicolons, except where they can be used like: + * "for(v=1,_=b;;)", "for(v=1;;v++)" or "for(;;ja||(ja=true))". + * I'll safeguard these double semicolons inside for-loops by + * temporarily replacing them with an invalid condition: they won't have + * a double semicolon and will be easy to spot to restore afterwards. + */ + $content = preg_replace('/\bfor\(([^;]*);;([^;]*)\)/', 'for(\\1;-;\\2)', $content); + $content = preg_replace('/;+/', ';', $content); + $content = preg_replace('/\bfor\(([^;]*);-;([^;]*)\)/', 'for(\\1;;\\2)', $content); + + /* + * Next, we'll be removing all semicolons where ASI kicks in. + * for-loops however, can have an empty body (ending in only a + * semicolon), like: `for(i=1;i<3;i++);`, of `for(i in list);` + * Here, nothing happens during the loop; it's just used to keep + * increasing `i`. With that ; omitted, the next line would be expected + * to be the for-loop's body... Same goes for while loops. + * I'm going to double that semicolon (if any) so after the next line, + * which strips semicolons here & there, we're still left with this one. + */ + $content = preg_replace('/(for\([^;\{]*;[^;\{]*;[^;\{]*\));(\}|$)/s', '\\1;;\\2', $content); + $content = preg_replace('/(for\([^;\{]+\s+in\s+[^;\{]+\));(\}|$)/s', '\\1;;\\2', $content); + /* + * Below will also keep `;` after a `do{}while();` along with `while();` + * While these could be stripped after do-while, detecting this + * distinction is cumbersome, so I'll play it safe and make sure `;` + * after any kind of `while` is kept. + */ + $content = preg_replace('/(while\([^;\{]+\));(\}|$)/s', '\\1;;\\2', $content); + + /* + * We also can't strip empty else-statements. Even though they're + * useless and probably shouldn't be in the code in the first place, we + * shouldn't be stripping the `;` that follows it as it breaks the code. + * We can just remove those useless else-statements completely. + * + * @see https://github.com/matthiasmullie/minify/issues/91 + */ + $content = preg_replace('/else;/s', '', $content); + + /* + * We also don't really want to terminate statements followed by closing + * curly braces (which we've ignored completely up until now) or end-of- + * script: ASI will kick in here & we're all about minifying. + * Semicolons at beginning of the file don't make any sense either. + */ + $content = preg_replace('/;(\}|$)/s', '\\1', $content); + $content = ltrim($content, ';'); + + // get rid of remaining whitespace af beginning/end + return trim($content); + } + + /** + * We'll strip whitespace around certain operators with regular expressions. + * This will prepare the given array by escaping all characters. + * + * @param string[] $operators + * @param string $delimiter + * + * @return string[] + */ + protected function getOperatorsForRegex(array $operators, $delimiter = '/') + { + // escape operators for use in regex + $delimiters = array_fill(0, count($operators), $delimiter); + $escaped = array_map('preg_quote', $operators, $delimiters); + + $operators = array_combine($operators, $escaped); + + // ignore + & - for now, they'll get special treatment + unset($operators['+'], $operators['-']); + + // dot can not just immediately follow a number; it can be confused for + // decimal point, or calling a method on it, e.g. 42 .toString() + $operators['.'] = '(?<![0-9]\s)\.'; + + // don't confuse = with other assignment shortcuts (e.g. +=) + $chars = preg_quote('+-*\=<>%&|', $delimiter); + $operators['='] = '(?<!['.$chars.'])\='; + + return $operators; + } + + /** + * We'll strip whitespace around certain keywords with regular expressions. + * This will prepare the given array by escaping all characters. + * + * @param string[] $keywords + * @param string $delimiter + * + * @return string[] + */ + protected function getKeywordsForRegex(array $keywords, $delimiter = '/') + { + // escape keywords for use in regex + $delimiter = array_fill(0, count($keywords), $delimiter); + $escaped = array_map('preg_quote', $keywords, $delimiter); + + // add word boundaries + array_walk($keywords, function ($value) { + return '\b'.$value.'\b'; + }); + + $keywords = array_combine($keywords, $escaped); + + return $keywords; + } + + /** + * Replaces all occurrences of array['key'] by array.key. + * + * @param string $content + * + * @return string + */ + protected function propertyNotation($content) + { + // PHP only supports $this inside anonymous functions since 5.4 + $minifier = $this; + $keywords = $this->keywordsReserved; + $callback = function ($match) use ($minifier, $keywords) { + $property = trim($minifier->extracted[$match[1]], '\'"'); + + /* + * Check if the property is a reserved keyword. In this context (as + * property of an object literal/array) it shouldn't matter, but IE8 + * freaks out with "Expected identifier". + */ + if (in_array($property, $keywords)) { + return $match[0]; + } + + /* + * See if the property is in a variable-like format (e.g. + * array['key-here'] can't be replaced by array.key-here since '-' + * is not a valid character there. + */ + if (!preg_match('/^'.$minifier::REGEX_VARIABLE.'$/u', $property)) { + return $match[0]; + } + + return '.'.$property; + }; + + /* + * Figure out if previous character is a variable name (of the array + * we want to use property notation on) - this is to make sure + * standalone ['value'] arrays aren't confused for keys-of-an-array. + * We can (and only have to) check the last character, because PHP's + * regex implementation doesn't allow unfixed-length look-behind + * assertions. + */ + preg_match('/(\[[^\]]+\])[^\]]*$/', static::REGEX_VARIABLE, $previousChar); + $previousChar = $previousChar[1]; + + /* + * Make sure word preceding the ['value'] is not a keyword, e.g. + * return['x']. Because -again- PHP's regex implementation doesn't allow + * unfixed-length look-behind assertions, I'm just going to do a lot of + * separate look-behind assertions, one for each keyword. + */ + $keywords = $this->getKeywordsForRegex($keywords); + $keywords = '(?<!'.implode(')(?<!', $keywords).')'; + + return preg_replace_callback('/(?<='.$previousChar.'|\])'.$keywords.'\[\s*(([\'"])[0-9]+\\2)\s*\]/u', $callback, $content); + } + + /** + * Replaces true & false by !0 and !1. + * + * @param string $content + * + * @return string + */ + protected function shortenBools($content) + { + /* + * 'true' or 'false' could be used as property names (which may be + * followed by whitespace) - we must not replace those! + * Since PHP doesn't allow variable-length (to account for the + * whitespace) lookbehind assertions, I need to capture the leading + * character and check if it's a `.` + */ + $callback = function ($match) { + if (trim($match[1]) === '.') { + return $match[0]; + } + + return $match[1].($match[2] === 'true' ? '!0' : '!1'); + }; + $content = preg_replace_callback('/(^|.\s*)\b(true|false)\b(?!:)/', $callback, $content); + + // for(;;) is exactly the same as while(true), but shorter :) + $content = preg_replace('/\bwhile\(!0\){/', 'for(;;){', $content); + + // now make sure we didn't turn any do ... while(true) into do ... for(;;) + preg_match_all('/\bdo\b/', $content, $dos, PREG_OFFSET_CAPTURE | PREG_SET_ORDER); + + // go backward to make sure positional offsets aren't altered when $content changes + $dos = array_reverse($dos); + foreach ($dos as $do) { + $offsetDo = $do[0][1]; + + // find all `while` (now `for`) following `do`: one of those must be + // associated with the `do` and be turned back into `while` + preg_match_all('/\bfor\(;;\)/', $content, $whiles, PREG_OFFSET_CAPTURE | PREG_SET_ORDER, $offsetDo); + foreach ($whiles as $while) { + $offsetWhile = $while[0][1]; + + $open = substr_count($content, '{', $offsetDo, $offsetWhile - $offsetDo); + $close = substr_count($content, '}', $offsetDo, $offsetWhile - $offsetDo); + if ($open === $close) { + // only restore `while` if amount of `{` and `}` are the same; + // otherwise, that `for` isn't associated with this `do` + $content = substr_replace($content, 'while(!0)', $offsetWhile, strlen('for(;;)')); + break; + } + } + } + + return $content; + } +} diff --git a/plugins/Customizer/vendor/matthiasmullie/minify/src/Minify.php b/plugins/Customizer/vendor/matthiasmullie/minify/src/Minify.php new file mode 100644 index 00000000..bfbc1ad2 --- /dev/null +++ b/plugins/Customizer/vendor/matthiasmullie/minify/src/Minify.php @@ -0,0 +1,459 @@ +<?php +/** + * Abstract minifier class + * + * Please report bugs on https://github.com/matthiasmullie/minify/issues + * + * @author Matthias Mullie <minify@mullie.eu> + * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved + * @license MIT License + */ +namespace MatthiasMullie\Minify; + +use MatthiasMullie\Minify\Exceptions\IOException; +use Psr\Cache\CacheItemInterface; + +/** + * Abstract minifier class. + * + * Please report bugs on https://github.com/matthiasmullie/minify/issues + * + * @package Minify + * @author Matthias Mullie <minify@mullie.eu> + * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved + * @license MIT License + */ +abstract class Minify +{ + /** + * The data to be minified. + * + * @var string[] + */ + protected $data = array(); + + /** + * Array of patterns to match. + * + * @var string[] + */ + protected $patterns = array(); + + /** + * This array will hold content of strings and regular expressions that have + * been extracted from the JS source code, so we can reliably match "code", + * without having to worry about potential "code-like" characters inside. + * + * @var string[] + */ + public $extracted = array(); + + /** + * Init the minify class - optionally, code may be passed along already. + */ + public function __construct(/* $data = null, ... */) + { + // it's possible to add the source through the constructor as well ;) + if (func_num_args()) { + call_user_func_array(array($this, 'add'), func_get_args()); + } + } + + /** + * Add a file or straight-up code to be minified. + * + * @param string|string[] $data + * + * @return static + */ + public function add($data /* $data = null, ... */) + { + // bogus "usage" of parameter $data: scrutinizer warns this variable is + // not used (we're using func_get_args instead to support overloading), + // but it still needs to be defined because it makes no sense to have + // this function without argument :) + $args = array($data) + func_get_args(); + + // this method can be overloaded + foreach ($args as $data) { + if (is_array($data)) { + call_user_func_array(array($this, 'add'), $data); + continue; + } + + // redefine var + $data = (string) $data; + + // load data + $value = $this->load($data); + $key = ($data != $value) ? $data : count($this->data); + + // replace CR linefeeds etc. + // @see https://github.com/matthiasmullie/minify/pull/139 + $value = str_replace(array("\r\n", "\r"), "\n", $value); + + // store data + $this->data[$key] = $value; + } + + return $this; + } + + /** + * Minify the data & (optionally) saves it to a file. + * + * @param string[optional] $path Path to write the data to + * + * @return string The minified data + */ + public function minify($path = null) + { + $content = $this->execute($path); + + // save to path + if ($path !== null) { + $this->save($content, $path); + } + + return $content; + } + + /** + * Minify & gzip the data & (optionally) saves it to a file. + * + * @param string[optional] $path Path to write the data to + * @param int[optional] $level Compression level, from 0 to 9 + * + * @return string The minified & gzipped data + */ + public function gzip($path = null, $level = 9) + { + $content = $this->execute($path); + $content = gzencode($content, $level, FORCE_GZIP); + + // save to path + if ($path !== null) { + $this->save($content, $path); + } + + return $content; + } + + /** + * Minify the data & write it to a CacheItemInterface object. + * + * @param CacheItemInterface $item Cache item to write the data to + * + * @return CacheItemInterface Cache item with the minifier data + */ + public function cache(CacheItemInterface $item) + { + $content = $this->execute(); + $item->set($content); + + return $item; + } + + /** + * Minify the data. + * + * @param string[optional] $path Path to write the data to + * + * @return string The minified data + */ + abstract public function execute($path = null); + + /** + * Load data. + * + * @param string $data Either a path to a file or the content itself + * + * @return string + */ + protected function load($data) + { + // check if the data is a file + if ($this->canImportFile($data)) { + $data = file_get_contents($data); + + // strip BOM, if any + if (substr($data, 0, 3) == "\xef\xbb\xbf") { + $data = substr($data, 3); + } + } + + return $data; + } + + /** + * Save to file. + * + * @param string $content The minified data + * @param string $path The path to save the minified data to + * + * @throws IOException + */ + protected function save($content, $path) + { + $handler = $this->openFileForWriting($path); + + $this->writeToFile($handler, $content); + + @fclose($handler); + } + + /** + * Register a pattern to execute against the source content. + * + * @param string $pattern PCRE pattern + * @param string|callable $replacement Replacement value for matched pattern + */ + protected function registerPattern($pattern, $replacement = '') + { + // study the pattern, we'll execute it more than once + $pattern .= 'S'; + + $this->patterns[] = array($pattern, $replacement); + } + + /** + * We can't "just" run some regular expressions against JavaScript: it's a + * complex language. E.g. having an occurrence of // xyz would be a comment, + * unless it's used within a string. Of you could have something that looks + * like a 'string', but inside a comment. + * The only way to accurately replace these pieces is to traverse the JS one + * character at a time and try to find whatever starts first. + * + * @param string $content The content to replace patterns in + * + * @return string The (manipulated) content + */ + protected function replace($content) + { + $processed = ''; + $positions = array_fill(0, count($this->patterns), -1); + $matches = array(); + + while ($content) { + // find first match for all patterns + foreach ($this->patterns as $i => $pattern) { + list($pattern, $replacement) = $pattern; + + // we can safely ignore patterns for positions we've unset earlier, + // because we know these won't show up anymore + if (!isset($positions[$i])) { + continue; + } + + // no need to re-run matches that are still in the part of the + // content that hasn't been processed + if ($positions[$i] >= 0) { + continue; + } + + $match = null; + if (preg_match($pattern, $content, $match, PREG_OFFSET_CAPTURE)) { + $matches[$i] = $match; + + // we'll store the match position as well; that way, we + // don't have to redo all preg_matches after changing only + // the first (we'll still know where those others are) + $positions[$i] = $match[0][1]; + } else { + // if the pattern couldn't be matched, there's no point in + // executing it again in later runs on this same content; + // ignore this one until we reach end of content + unset($matches[$i], $positions[$i]); + } + } + + // no more matches to find: everything's been processed, break out + if (!$matches) { + $processed .= $content; + break; + } + + // see which of the patterns actually found the first thing (we'll + // only want to execute that one, since we're unsure if what the + // other found was not inside what the first found) + $discardLength = min($positions); + $firstPattern = array_search($discardLength, $positions); + $match = $matches[$firstPattern][0][0]; + + // execute the pattern that matches earliest in the content string + list($pattern, $replacement) = $this->patterns[$firstPattern]; + $replacement = $this->replacePattern($pattern, $replacement, $content); + + // figure out which part of the string was unmatched; that's the + // part we'll execute the patterns on again next + $content = (string) substr($content, $discardLength); + $unmatched = (string) substr($content, strpos($content, $match) + strlen($match)); + + // move the replaced part to $processed and prepare $content to + // again match batch of patterns against + $processed .= substr($replacement, 0, strlen($replacement) - strlen($unmatched)); + $content = $unmatched; + + // first match has been replaced & that content is to be left alone, + // the next matches will start after this replacement, so we should + // fix their offsets + foreach ($positions as $i => $position) { + $positions[$i] -= $discardLength + strlen($match); + } + } + + return $processed; + } + + /** + * This is where a pattern is matched against $content and the matches + * are replaced by their respective value. + * This function will be called plenty of times, where $content will always + * move up 1 character. + * + * @param string $pattern Pattern to match + * @param string|callable $replacement Replacement value + * @param string $content Content to match pattern against + * + * @return string + */ + protected function replacePattern($pattern, $replacement, $content) + { + if (is_callable($replacement)) { + return preg_replace_callback($pattern, $replacement, $content, 1, $count); + } else { + return preg_replace($pattern, $replacement, $content, 1, $count); + } + } + + /** + * Strings are a pattern we need to match, in order to ignore potential + * code-like content inside them, but we just want all of the string + * content to remain untouched. + * + * This method will replace all string content with simple STRING# + * placeholder text, so we've rid all strings from characters that may be + * misinterpreted. Original string content will be saved in $this->extracted + * and after doing all other minifying, we can restore the original content + * via restoreStrings(). + * + * @param string[optional] $chars + * @param string[optional] $placeholderPrefix + */ + protected function extractStrings($chars = '\'"', $placeholderPrefix = '') + { + // PHP only supports $this inside anonymous functions since 5.4 + $minifier = $this; + $callback = function ($match) use ($minifier, $placeholderPrefix) { + // check the second index here, because the first always contains a quote + if ($match[2] === '') { + /* + * Empty strings need no placeholder; they can't be confused for + * anything else anyway. + * But we still needed to match them, for the extraction routine + * to skip over this particular string. + */ + return $match[0]; + } + + $count = count($minifier->extracted); + $placeholder = $match[1].$placeholderPrefix.$count.$match[1]; + $minifier->extracted[$placeholder] = $match[1].$match[2].$match[1]; + + return $placeholder; + }; + + /* + * The \\ messiness explained: + * * Don't count ' or " as end-of-string if it's escaped (has backslash + * in front of it) + * * Unless... that backslash itself is escaped (another leading slash), + * in which case it's no longer escaping the ' or " + * * So there can be either no backslash, or an even number + * * multiply all of that times 4, to account for the escaping that has + * to be done to pass the backslash into the PHP string without it being + * considered as escape-char (times 2) and to get it in the regex, + * escaped (times 2) + */ + $this->registerPattern('/(['.$chars.'])(.*?(?<!\\\\)(\\\\\\\\)*+)\\1/s', $callback); + } + + /** + * This method will restore all extracted data (strings, regexes) that were + * replaced with placeholder text in extract*(). The original content was + * saved in $this->extracted. + * + * @param string $content + * + * @return string + */ + protected function restoreExtractedData($content) + { + if (!$this->extracted) { + // nothing was extracted, nothing to restore + return $content; + } + + $content = strtr($content, $this->extracted); + + $this->extracted = array(); + + return $content; + } + + /** + * Check if the path is a regular file and can be read. + * + * @param string $path + * + * @return bool + */ + protected function canImportFile($path) + { + $parsed = parse_url($path); + if ( + // file is elsewhere + isset($parsed['host']) || + // file responds to queries (may change, or need to bypass cache) + isset($parsed['query']) + ) { + return false; + } + + return strlen($path) < PHP_MAXPATHLEN && @is_file($path) && is_readable($path); + } + + /** + * Attempts to open file specified by $path for writing. + * + * @param string $path The path to the file + * + * @return resource Specifier for the target file + * + * @throws IOException + */ + protected function openFileForWriting($path) + { + if (($handler = @fopen($path, 'w')) === false) { + throw new IOException('The file "'.$path.'" could not be opened for writing. Check if PHP has enough permissions.'); + } + + return $handler; + } + + /** + * Attempts to write $content to the file specified by $handler. $path is used for printing exceptions. + * + * @param resource $handler The resource to write to + * @param string $content The content to write + * @param string $path The path to the file (for exception printing only) + * + * @throws IOException + */ + protected function writeToFile($handler, $content, $path = '') + { + if (($result = @fwrite($handler, $content)) === false || ($result < strlen($content))) { + throw new IOException('The file "'.$path.'" could not be written to. Check your disk space and file permissions.'); + } + } +} |