2003 lines
89 KiB
PHP
2003 lines
89 KiB
PHP
<?php
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// Bundle extension, https://github.com/datenstrom/yellow-extensions/tree/master/source/bundle
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class YellowBundle {
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const VERSION = "0.8.24";
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public $yellow; // access to API
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// Handle initialisation
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public function onLoad($yellow) {
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$this->yellow = $yellow;
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}
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// Handle update
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public function onUpdate($action) {
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if ($action=="clean" || $action=="daily" || $action=="uninstall") {
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$statusCode = 200;
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$path = $this->yellow->system->get("coreExtensionDirectory");
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foreach ($this->yellow->toolbox->getDirectoryEntries($path, "/^bundle-(.*)/", false, false) as $entry) {
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$cleanup = $action!="daily" || !$this->isBundleRequired($entry);
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if ($cleanup && !$this->yellow->toolbox->deleteFile($entry)) $statusCode = 500;
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}
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if ($statusCode==500) $this->yellow->log("error", "Can't delete files in directory '$path'!\n");
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}
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}
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// Handle page output data
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public function onParsePageOutput($page, $text) {
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$output = null;
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if ($text && preg_match("/^(.*<head>[\r\n]+)(.*)(<\/head>.*)$/s", $text, $matches)) {
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$output = $matches[1].$this->normaliseHead($matches[2]).$matches[3];
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}
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return $output;
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}
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// Normalise page head
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public function normaliseHead($text) {
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$dataMeta = $dataLink = $dataCss = $dataScriptDefer = $dataScriptNow = $dataOther = array();
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foreach ($this->yellow->toolbox->getTextLines($text) as $line) {
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if (preg_match("/^<meta (.*?)>$/i", $line) || preg_match("/^<title>(.*?)<\/title>$/i", $line)) {
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array_push($dataMeta, $line);
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} elseif (preg_match("/^<link (.*?)href=\"([^\"]+)\"(.*?)>$/i", $line, $matches)) {
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if (preg_match("/\"stylesheet\"/i", $line)) {
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if (!isset($dataCss[$matches[2]])) $dataCss[$matches[2]] = $line;
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} else {
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array_push($dataLink, $line);
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}
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} elseif (preg_match("/^<script (.*?)src=\"([^\"]+)\"(.*?)><\/script>$/i", $line, $matches)) {
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if (preg_match("/\"defer\"/i", $line)) {
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if (!isset($dataScriptDefer[$matches[2]])) $dataScriptDefer[$matches[2]] = $line;
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} else {
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if (!isset($dataScriptNow[$matches[2]])) $dataScriptNow[$matches[2]] = $line;
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}
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} else {
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array_push($dataOther, $line);
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}
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}
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if (!$this->yellow->system->get("coreDebugMode")) {
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$dataCss = $this->processBundle($dataCss, "css");
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$dataScriptDefer = $this->processBundle($dataScriptDefer, "js", "defer");
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$dataScriptNow = $this->processBundle($dataScriptNow, "js");
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}
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$output = implode($dataMeta).implode($dataLink).implode($dataCss).
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implode($dataScriptDefer).implode($dataScriptNow).implode($dataOther);
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return $output;
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}
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// Process bundle, create file on demand
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public function processBundle($data, $type, $attribute = "") {
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$fileNames = array();
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$modified = 0;
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$scheme = $this->yellow->system->get("coreServerScheme");
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$address = $this->yellow->system->get("coreServerAddress");
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$base = $this->yellow->system->get("coreServerBase");
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foreach ($data as $key=>$value) {
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if (preg_match("/^\w+:/", $key)) continue;
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if (preg_match("/data-bundle=\"exclude\"/i", $value)) continue;
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if (substru($key, 0, strlenu($base))!=$base) continue;
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$location = substru($key, strlenu($base));
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$fileName = $this->yellow->lookup->findFileFromSystem($location);
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$modified = max($modified, $this->yellow->toolbox->getFileModified($fileName));
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if (is_readable($fileName)) {
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array_push($fileNames, $fileName);
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unset($data[$key]);
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}
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}
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if (!empty($fileNames)) {
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$id = $this->getBundleId($fileNames, $modified);
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$fileNameBundle = $this->yellow->system->get("coreExtensionDirectory")."bundle-$id.min.$type";
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$locationBundle = $base.$this->yellow->system->get("coreExtensionLocation")."bundle-$id.min.$type";
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$rawDataAttribute = $attribute=="defer" ? "defer=\"defer\" " : "";
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if ($type=="css") {
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$data[$locationBundle] = "<link rel=\"stylesheet\" type=\"text/css\" media=\"all\" href=\"".htmlspecialchars($locationBundle)."\" />\n";
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} else {
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$data[$locationBundle] = "<script type=\"text/javascript\" ${rawDataAttribute}src=\"".htmlspecialchars($locationBundle)."\"></script>\n";
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}
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if ($this->yellow->toolbox->getFileModified($fileNameBundle)!=$modified) {
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$fileDataBundle = "";
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foreach ($fileNames as $fileName) {
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$fileData = $this->yellow->toolbox->readFile($fileName);
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$fileData = $this->processBundleConvert($scheme, $address, $base, $fileData, $fileName, $type);
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$fileData = $this->processBundleMinify($scheme, $address, $base, $fileData, $fileName, $type);
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if (!empty($fileDataBundle)) $fileDataBundle .= "\n\n";
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$fileDataBundle .= $fileData;
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}
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if ($type=="css") $fileDataBundle = $this->normaliseCss($fileDataBundle);
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if (is_file($fileNameBundle)) $this->yellow->toolbox->deleteFile($fileNameBundle);
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if (!$this->yellow->toolbox->createFile($fileNameBundle, $fileDataBundle) ||
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!$this->yellow->toolbox->modifyFile($fileNameBundle, $modified)) {
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$this->yellow->page->error(500, "Can't write file '$fileNameBundle'!");
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}
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}
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}
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return $data;
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}
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// Process bundle, convert URLs
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public function processBundleConvert($scheme, $address, $base, $fileData, $fileName, $type) {
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if ($type=="css") {
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$themeDirectoryLength = strlenu($this->yellow->system->get("coreThemeDirectory"));
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if (substru($fileName, 0, $themeDirectoryLength) == $this->yellow->system->get("coreThemeDirectory")) {
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$base .= $this->yellow->system->get("coreThemeLocation");
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} else {
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$base .= $this->yellow->system->get("coreExtensionLocation");
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}
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$thisCompatible = $this;
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$callback = function ($matches) use ($thisCompatible, $scheme, $address, $base) {
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$url = $thisCompatible->yellow->lookup->normaliseUrl($scheme, $address, $base, $matches[1], false);
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$url = str_replace("$scheme://$address", "", $url);
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return "url(\"$url\")";
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};
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$fileData = preg_replace_callback("/url\([\'\"]?(.*?)[\'\"]?\)/", $callback, $fileData);
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}
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return $fileData;
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}
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// Process bundle, minify data
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public function processBundleMinify($scheme, $address, $base, $fileData, $fileName, $type) {
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$minifier = $type=="css" ? new MinifyCss() : new MinifyJavaScript();
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if (preg_match("/\.min/", $fileName)) $minifier = new MinifyBasic();
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$minifier->add($fileData);
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$fileData = $minifier->minify();
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if (substrb($fileData, 0, 3)=="\xEF\xBB\xBF") $fileData = substrb($fileData, 3);
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if (substrb($fileData, 0, 13)=="\"use strict\";" || substrb($fileData, 0, 13)=="'use strict';") $fileData = substrb($fileData, 13);
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return "/* ".basename($fileName)." */\n".$fileData;
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}
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// Normalise CSS, move import rules to top
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public function normaliseCss($fileData) {
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if (preg_match_all("/(;?)(@import (?<url>url\()?(?P<quotes>[\"\']?).+?(?P=quotes)(?(url)\)));?/", $fileData, $matches)) {
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foreach ($matches[0] as $match) {
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$fileData = str_replace($match, "", $fileData);
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}
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$fileData = "/* Import rules from files */\n".implode(";", $matches[2]).";\n\n".$fileData;
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}
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return $fileData;
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}
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// Return bundle information
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public function getBundleInformation($fileName) {
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$locations = $fileNames = array();
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$modified = 0;
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$fileData = $this->yellow->toolbox->readFile($fileName);
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foreach ($this->yellow->toolbox->getTextLines($fileData) as $line) {
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if (preg_match("/^\/\* (\S*) \*\/$/", $line, $matches)) {
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$fileNameOne = $this->yellow->system->get("coreExtensionDirectory").$matches[1];
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$fileNameTwo = $this->yellow->system->get("coreThemeDirectory").$matches[1];
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if (is_readable($fileNameOne)) {
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array_push($locations, $this->yellow->system->get("coreExtensionLocation").$matches[1]);
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array_push($fileNames, $fileNameOne);
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$modified = max($modified, $this->yellow->toolbox->getFileModified($fileNameOne));
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} elseif (is_readable($fileNameTwo)) {
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array_push($locations, $this->yellow->system->get("coreThemeLocation").$matches[1]);
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array_push($fileNames, $fileNameTwo);
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$modified = max($modified, $this->yellow->toolbox->getFileModified($fileNameTwo));
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}
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}
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}
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return array($locations, $fileNames, $modified);
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}
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// Return bundle ID
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public function getBundleId($fileNames, $modified) {
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$autoVersioning = intval($modified/(60*60*24));
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$base = $this->yellow->system->get("coreServerBase");
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return substru(md5($autoVersioning.$base.implode($fileNames)), 0, 10);
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}
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// Check if bundle is required
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public function isBundleRequired($fileName) {
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list($dummy, $fileNames, $modified) = $this->getBundleInformation($fileName);
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$idExpected = $idCurrent = $this->getBundleId($fileNames, $modified);
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if (preg_match("/^bundle-(.*)\.min/", basename($fileName), $matches)) $idCurrent = $matches[1];
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return $idExpected==$idCurrent && !$this->yellow->system->get("coreDebugMode");
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}
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}
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/**
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* Abstract minifier class.
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*
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* Please report bugs on https://github.com/matthiasmullie/minify/issues
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*
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* @package Minify
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* @author Matthias Mullie <minify@mullie.eu>
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* @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved
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* @license MIT License
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*/
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abstract class Minify
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{
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/**
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* The data to be minified.
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*
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* @var string[]
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*/
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protected $data = array();
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/**
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* Array of patterns to match.
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*
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* @var string[]
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*/
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protected $patterns = array();
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/**
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* This array will hold content of strings and regular expressions that have
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* been extracted from the JS source code, so we can reliably match "code",
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* without having to worry about potential "code-like" characters inside.
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*
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* @var string[]
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*/
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public $extracted = array();
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/**
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* Init the minify class - optionally, code may be passed along already.
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*/
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public function __construct(/* $data = null, ... */)
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{
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// it's possible to add the source through the constructor as well ;)
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if (func_num_args()) {
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call_user_func_array(array($this, 'add'), func_get_args());
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}
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}
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/**
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* Add a file or straight-up code to be minified.
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*
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* @param string|string[] $data
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*
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* @return static
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*/
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public function add($data /* $data = null, ... */)
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{
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// bogus "usage" of parameter $data: scrutinizer warns this variable is
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// not used (we're using func_get_args instead to support overloading),
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// but it still needs to be defined because it makes no sense to have
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// this function without argument :)
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$args = array($data) + func_get_args();
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// this method can be overloaded
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foreach ($args as $data) {
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if (is_array($data)) {
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call_user_func_array(array($this, 'add'), $data);
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continue;
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}
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// redefine var
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$data = (string) $data;
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// load data
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$value = $this->load($data);
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$key = ($data != $value) ? $data : count($this->data);
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// replace CR linefeeds etc.
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// @see https://github.com/matthiasmullie/minify/pull/139
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$value = str_replace(array("\r\n", "\r"), "\n", $value);
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// store data
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$this->data[$key] = $value;
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}
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return $this;
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}
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/**
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* Minify the data & (optionally) saves it to a file.
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*
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* @param string[optional] $path Path to write the data to
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*
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* @return string The minified data
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*/
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public function minify($path = null)
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{
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$content = $this->execute($path);
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// save to path
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if ($path !== null) {
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$this->save($content, $path);
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}
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return $content;
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}
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/**
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* Minify & gzip the data & (optionally) saves it to a file.
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*
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* @param string[optional] $path Path to write the data to
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* @param int[optional] $level Compression level, from 0 to 9
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*
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* @return string The minified & gzipped data
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*/
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public function gzip($path = null, $level = 9)
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{
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$content = $this->execute($path);
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$content = gzencode($content, $level, FORCE_GZIP);
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// save to path
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if ($path !== null) {
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$this->save($content, $path);
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}
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return $content;
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}
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/**
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* Minify the data & write it to a CacheItemInterface object.
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*
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* @param CacheItemInterface $item Cache item to write the data to
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*
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* @return CacheItemInterface Cache item with the minifier data
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*/
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public function cache(CacheItemInterface $item)
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{
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$content = $this->execute();
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$item->set($content);
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return $item;
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}
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/**
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* Minify the data.
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*
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* @param string[optional] $path Path to write the data to
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*
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* @return string The minified data
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*/
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abstract public function execute($path = null);
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/**
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* Load data.
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*
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* @param string $data Either a path to a file or the content itself
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*
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* @return string
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*/
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protected function load($data)
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{
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// check if the data is a file
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if ($this->canImportFile($data)) {
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$data = file_get_contents($data);
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// strip BOM, if any
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if (substr($data, 0, 3) == "\xef\xbb\xbf") {
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$data = substr($data, 3);
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}
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}
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return $data;
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}
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/**
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* Save to file.
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*
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* @param string $content The minified data
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* @param string $path The path to save the minified data to
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*
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* @throws IOException
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*/
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protected function save($content, $path)
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{
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$handler = $this->openFileForWriting($path);
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$this->writeToFile($handler, $content);
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@fclose($handler);
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}
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/**
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* Register a pattern to execute against the source content.
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*
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* @param string $pattern PCRE pattern
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* @param string|callable $replacement Replacement value for matched pattern
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*/
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protected function registerPattern($pattern, $replacement = '')
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{
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// study the pattern, we'll execute it more than once
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$pattern .= 'S';
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$this->patterns[] = array($pattern, $replacement);
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}
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/**
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* We can't "just" run some regular expressions against JavaScript: it's a
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* complex language. E.g. having an occurrence of // xyz would be a comment,
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* unless it's used within a string. Of you could have something that looks
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* like a 'string', but inside a comment.
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* The only way to accurately replace these pieces is to traverse the JS one
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* character at a time and try to find whatever starts first.
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*
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* @param string $content The content to replace patterns in
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*
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* @return string The (manipulated) content
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*/
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protected function replace($content)
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{
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$processed = '';
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$positions = array_fill(0, count($this->patterns), -1);
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$matches = array();
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while ($content) {
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// find first match for all patterns
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foreach ($this->patterns as $i => $pattern) {
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list($pattern, $replacement) = $pattern;
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// we can safely ignore patterns for positions we've unset earlier,
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// because we know these won't show up anymore
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if (array_key_exists($i, $positions) == false) {
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continue;
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}
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// no need to re-run matches that are still in the part of the
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// content that hasn't been processed
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if ($positions[$i] >= 0) {
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continue;
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}
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$match = null;
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if (preg_match($pattern, $content, $match, PREG_OFFSET_CAPTURE)) {
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$matches[$i] = $match;
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// we'll store the match position as well; that way, we
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// don't have to redo all preg_matches after changing only
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// the first (we'll still know where those others are)
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$positions[$i] = $match[0][1];
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} else {
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// if the pattern couldn't be matched, there's no point in
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// executing it again in later runs on this same content;
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// ignore this one until we reach end of content
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unset($matches[$i], $positions[$i]);
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}
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}
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// no more matches to find: everything's been processed, break out
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if (!$matches) {
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$processed .= $content;
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break;
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}
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// see which of the patterns actually found the first thing (we'll
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// only want to execute that one, since we're unsure if what the
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// other found was not inside what the first found)
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$discardLength = min($positions);
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$firstPattern = array_search($discardLength, $positions);
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$match = $matches[$firstPattern][0][0];
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// execute the pattern that matches earliest in the content string
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list($pattern, $replacement) = $this->patterns[$firstPattern];
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$replacement = $this->replacePattern($pattern, $replacement, $content);
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// figure out which part of the string was unmatched; that's the
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// part we'll execute the patterns on again next
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$content = (string) substr($content, $discardLength);
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$unmatched = (string) substr($content, strpos($content, $match) + strlen($match));
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// move the replaced part to $processed and prepare $content to
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// again match batch of patterns against
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$processed .= substr($replacement, 0, strlen($replacement) - strlen($unmatched));
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$content = $unmatched;
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// first match has been replaced & that content is to be left alone,
|
|
// the next matches will start after this replacement, so we should
|
|
// fix their offsets
|
|
foreach ($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.');
|
|
}
|
|
}
|
|
}
|
|
|
|
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);
|
|
$minifier->setMaxImportSize($this->maxImportSize);
|
|
$minifier->setImportExtensions($this->importExtensions);
|
|
$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();
|
|
$this->extractCalcs();
|
|
$css = $this->replace($css);
|
|
|
|
$css = $this->stripWhitespace($css);
|
|
$css = $this->shortenColors($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 $content The CSS content to shorten the hex color codes for
|
|
*
|
|
* @return string
|
|
*/
|
|
protected function shortenColors($content)
|
|
{
|
|
$content = preg_replace('/(?<=[: ])#([0-9a-z])\\1([0-9a-z])\\2([0-9a-z])\\3(?:([0-9a-z])\\4)?(?=[; }])/i', '#$1$2$3$4', $content);
|
|
|
|
// remove alpha channel if it's pointless...
|
|
$content = preg_replace('/(?<=[: ])#([0-9a-z]{6})ff?(?=[; }])/i', '#$1', $content);
|
|
$content = preg_replace('/(?<=[: ])#([0-9a-z]{3})f?(?=[; }])/i', '#$1', $content);
|
|
|
|
$colors = array(
|
|
// we can shorten some even more by replacing them with their color name
|
|
'#F0FFFF' => 'azure',
|
|
'#F5F5DC' => 'beige',
|
|
'#A52A2A' => 'brown',
|
|
'#FF7F50' => 'coral',
|
|
'#FFD700' => 'gold',
|
|
'#808080' => 'gray',
|
|
'#008000' => 'green',
|
|
'#4B0082' => 'indigo',
|
|
'#FFFFF0' => 'ivory',
|
|
'#F0E68C' => 'khaki',
|
|
'#FAF0E6' => 'linen',
|
|
'#800000' => 'maroon',
|
|
'#000080' => 'navy',
|
|
'#808000' => 'olive',
|
|
'#CD853F' => 'peru',
|
|
'#FFC0CB' => 'pink',
|
|
'#DDA0DD' => 'plum',
|
|
'#800080' => 'purple',
|
|
'#F00' => 'red',
|
|
'#FA8072' => 'salmon',
|
|
'#A0522D' => 'sienna',
|
|
'#C0C0C0' => 'silver',
|
|
'#FFFAFA' => 'snow',
|
|
'#D2B48C' => 'tan',
|
|
'#FF6347' => 'tomato',
|
|
'#EE82EE' => 'violet',
|
|
'#F5DEB3' => 'wheat',
|
|
// or the other way around
|
|
'WHITE' => '#fff',
|
|
'BLACK' => '#000',
|
|
);
|
|
|
|
return preg_replace_callback(
|
|
'/(?<=[: ])('.implode('|', array_keys($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
|
|
// we've extracted calcs earlier, so we don't need to worry about this
|
|
|
|
// 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);
|
|
|
|
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()
|
|
{
|
|
// 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;
|
|
};
|
|
$this->registerPattern('/\n?\/\*(!|.*?@license|.*?@preserve).*?\*\/\n?/s', $callback);
|
|
|
|
$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);
|
|
}
|
|
|
|
/**
|
|
* Replace all `calc()` occurrences.
|
|
*/
|
|
protected function extractCalcs()
|
|
{
|
|
// PHP only supports $this inside anonymous functions since 5.4
|
|
$minifier = $this;
|
|
$callback = function ($match) use ($minifier) {
|
|
$length = strlen($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;
|
|
}
|
|
}
|
|
$rest = str_replace($expr, '', $match[1]);
|
|
$expr = trim(substr($expr, 1, -1));
|
|
|
|
$count = count($minifier->extracted);
|
|
$placeholder = 'calc('.$count.')';
|
|
$minifier->extracted[$placeholder] = 'calc('.$expr.')';
|
|
|
|
return $placeholder.$rest;
|
|
};
|
|
|
|
$this->registerPattern('/calc(\(.+?)(?=$|;|}|calc\()/', $callback);
|
|
$this->registerPattern('/calc(\(.+?)(?=$|;|}|calc\()/m', $callback);
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
}
|
|
|
|
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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2}-\x{a788}\x{a78b}-\x{a78e}\x{a790}-\x{a793}\x{a7a0}-\x{a7aa}\x{a7f8}-\x{a801}\x{a803}-\x{a805}\x{a807}-\x{a80a}\x{a80c}-\x{a822}\x{a840}-\x{a873}\x{a882}-\x{a8b3}\x{a8f2}-\x{a8f7}\x{a8fb}\x{a90a}-\x{a925}\x{a930}-\x{a946}\x{a960}-\x{a97c}\x{a984}-\x{a9b2}\x{a9cf}\x{aa00}-\x{aa28}\x{aa40}-\x{aa42}\x{aa44}-\x{aa4b}\x{aa60}-\x{aa76}\x{aa7a}\x{aa80}-\x{aaaf}\x{aab1}\x{aab5}\x{aab6}\x{aab9}-\x{aabd}\x{aac0}\x{aac2}\x{aadb}-\x{aadd}\x{aae0}-\x{aaea}\x{aaf2}-\x{aaf4}\x{ab01}-\x{ab06}\x{ab09}-\x{ab0e}\x{ab11}-\x{ab16}\x{ab20}-\x{ab26}\x{ab28}-\x{ab2e}\x{abc0}-\x{abe2}\x{ac00}-\x{d7a3}\x{d7b0}-\x{d7c6}\x{d7cb}-\x{d7fb}\x{f900}-\x{fa6d}\x{fa70}-\x{fad9}\x{fb00}-\x{fb06}\x{fb13}-\x{fb17}\x{fb1d}\x{fb1f}-\x{fb28}\x{fb2a}-\x{fb36}\x{fb38}-\x{fb3c}\x{fb3e}\x{fb40}\x{fb41}\x{fb43}\x{fb44}\x{fb46}-\x{fbb1}\x{fbd3}-\x{fd3d}\x{fd50}-\x{fd8f}\x{fd92}-\x{fdc7}\x{fdf0}-\x{fdfb}\x{fe70}-\x{fe74}\x{fe76}-\x{fefc}\x{ff21}-\x{ff3a}\x{ff41}-\x{ff5a}\x{ff66}-\x{ffbe}\x{ffc2}-\x{ffc7}\x{ffca}-\x{ffcf}\x{ffd2}-\x{ffd7}\x{ffda}-\x{ffdc}0-9\x{0300}-\x{036f}\x{0483}-\x{0487}\x{0591}-\x{05bd}\x{05bf}\x{05c1}\x{05c2}\x{05c4}\x{05c5}\x{05c7}\x{0610}-\x{061a}\x{064b}-\x{0669}\x{0670}\x{06d6}-\x{06dc}\x{06df}-\x{06e4}\x{06e7}\x{06e8}\x{06ea}-\x{06ed}\x{06f0}-\x{06f9}\x{0711}\x{0730}-\x{074a}\x{07a6}-\x{07b0}\x{07c0}-\x{07c9}\x{07eb}-\x{07f3}\x{0816}-\x{0819}\x{081b}-\x{0823}\x{0825}-\x{0827}\x{0829}-\x{082d}\x{0859}-\x{085b}\x{08e4}-\x{08fe}\x{0900}-\x{0903}\x{093a}-\x{093c}\x{093e}-\x{094f}\x{0951}-\x{0957}\x{0962}\x{0963}\x{0966}-\x{096f}\x{0981}-\x{0983}\x{09bc}\x{09be}-\x{09c4}\x{09c7}\x{09c8}\x{09cb}-\x{09cd}\x{09d7}\x{09e2}\x{09e3}\x{09e6}-\x{09ef}\x{0a01}-\x{0a03}\x{0a3c}\x{0a3e}-\x{0a42}\x{0a47}\x{0a48}\x{0a4b}-\x{0a4d}\x{0a51}\x{0a66}-\x{0a71}\x{0a75}\x{0a81}-\x{0a83}\x{0abc}\x{0abe}-\x{0ac5}\x{0ac7}-\x{0ac9}\x{0acb}-\x{0acd}\x{0ae2}\x{0ae3}\x{0ae6}-\x{0aef}\x{0b01}-\x{0b03}\x{0b3c}\x{0b3e}-\x{0b44}\x{0b47}\x{0b48}\x{0b4b}-\x{0b4d}\x{0b56}\x{0b57}\x{0b62}\x{0b63}\x{0b66}-\x{0b6f}\x{0b82}\x{0bbe}-\x{0bc2}\x{0bc6}-\x{0bc8}\x{0bca}-\x{0bcd}\x{0bd7}\x{0be6}-\x{0bef}\x{0c01}-\x{0c03}\x{0c3e}-\x{0c44}\x{0c46}-\x{0c48}\x{0c4a}-\x{0c4d}\x{0c55}\x{0c56}\x{0c62}\x{0c63}\x{0c66}-\x{0c6f}\x{0c82}\x{0c83}\x{0cbc}\x{0cbe}-\x{0cc4}\x{0cc6}-\x{0cc8}\x{0cca}-\x{0ccd}\x{0cd5}\x{0cd6}\x{0ce2}\x{0ce3}\x{0ce6}-\x{0cef}\x{0d02}\x{0d03}\x{0d3e}-\x{0d44}\x{0d46}-\x{0d48}\x{0d4a}-\x{0d4d}\x{0d57}\x{0d62}\x{0d63}\x{0d66}-\x{0d6f}\x{0d82}\x{0d83}\x{0dca}\x{0dcf}-\x{0dd4}\x{0dd6}\x{0dd8}-\x{0ddf}\x{0df2}\x{0df3}\x{0e31}\x{0e34}-\x{0e3a}\x{0e47}-\x{0e4e}\x{0e50}-\x{0e59}\x{0eb1}\x{0eb4}-\x{0eb9}\x{0ebb}\x{0ebc}\x{0ec8}-\x{0ecd}\x{0ed0}-\x{0ed9}\x{0f18}\x{0f19}\x{0f20}-\x{0f29}\x{0f35}\x{0f37}\x{0f39}\x{0f3e}\x{0f3f}\x{0f71}-\x{0f84}\x{0f86}\x{0f87}\x{0f8d}-\x{0f97}\x{0f99}-\x{0fbc}\x{0fc6}\x{102b}-\x{103e}\x{1040}-\x{1049}\x{1056}-\x{1059}\x{105e}-\x{1060}\x{1062}-\x{1064}\x{1067}-\x{106d}\x{1071}-\x{1074}\x{1082}-\x{108d}\x{108f}-\x{109d}\x{135d}-\x{135f}\x{1712}-\x{1714}\x{1732}-\x{1734}\x{1752}\x{1753}\x{1772}\x{1773}\x{17b4}-\x{17d3}\x{17dd}\x{17e0}-\x{17e9}\x{180b}-\x{180d}\x{1810}-\x{1819}\x{18a9}\x{1920}-\x{192b}\x{1930}-\x{193b}\x{1946}-\x{194f}\x{19b0}-\x{19c0}\x{19c8}\x{19c9}\x{19d0}-\x{19d9}\x{1a17}-\x{1a1b}\x{1a55}-\x{1a5e}\x{1a60}-\x{1a7c}\x{1a7f}-\x{1a89}\x{1a90}-\x{1a99}\x{1b00}-\x{1b04}\x{1b34}-\x{1b44}\x{1b50}-\x{1b59}\x{1b6b}-\x{1b73}\x{1b80}-\x{1b82}\x{1ba1}-\x{1bad}\x{1bb0}-\x{1bb9}\x{1be6}-\x{1bf3}\x{1c24}-\x{1c37}\x{1c40}-\x{1c49}\x{1c50}-\x{1c59}\x{1cd0}-\x{1cd2}\x{1cd4}-\x{1ce8}\x{1ced}\x{1cf2}-\x{1cf4}\x{1dc0}-\x{1de6}\x{1dfc}-\x{1dff}\x{200c}\x{200d}\x{203f}\x{2040}\x{2054}\x{20d0}-\x{20dc}\x{20e1}\x{20e5}-\x{20f0}\x{2cef}-\x{2cf1}\x{2d7f}\x{2de0}-\x{2dff}\x{302a}-\x{302f}\x{3099}\x{309a}\x{a620}-\x{a629}\x{a66f}\x{a674}-\x{a67d}\x{a69f}\x{a6f0}\x{a6f1}\x{a802}\x{a806}\x{a80b}\x{a823}-\x{a827}\x{a880}\x{a881}\x{a8b4}-\x{a8c4}\x{a8d0}-\x{a8d9}\x{a8e0}-\x{a8f1}\x{a900}-\x{a909}\x{a926}-\x{a92d}\x{a947}-\x{a953}\x{a980}-\x{a983}\x{a9b3}-\x{a9c0}\x{a9d0}-\x{a9d9}\x{aa29}-\x{aa36}\x{aa43}\x{aa4c}\x{aa4d}\x{aa50}-\x{aa59}\x{aa7b}\x{aab0}\x{aab2}-\x{aab4}\x{aab7}\x{aab8}\x{aabe}\x{aabf}\x{aac1}\x{aaeb}-\x{aaef}\x{aaf5}\x{aaf6}\x{abe3}-\x{abea}\x{abec}\x{abed}\x{abf0}-\x{abf9}\x{fb1e}\x{fe00}-\x{fe0f}\x{fe20}-\x{fe26}\x{fe33}\x{fe34}\x{fe4d}-\x{fe4f}\x{ff10}-\x{ff19}\x{ff3f}]*\b';
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|
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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();
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|
|
/**
|
|
* 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
|
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* these keywords.
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*
|
|
* 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();
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|
|
|
/**
|
|
* 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();
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|
|
/**
|
|
* 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();
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|
|
/**
|
|
* 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();
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|
|
/**
|
|
* 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 (), ...
|
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*
|
|
* 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();
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/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function __construct()
|
|
{
|
|
call_user_func_array(array('parent', '__construct'), func_get_args());
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|
|
$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 = '';
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|
|
|
/*
|
|
* 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()
|
|
{
|
|
// 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;
|
|
};
|
|
// multi-line comments
|
|
$this->registerPattern('/\n?\/\*(!|.*?@license|.*?@preserve).*?\*\/\n?/s', $callback);
|
|
$this->registerPattern('/\/\*.*?\*\//s', '');
|
|
|
|
// single-line comments
|
|
$this->registerPattern('/\/\/.*$/m', '');
|
|
}
|
|
|
|
/**
|
|
* 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 $content;
|
|
}
|
|
}
|
|
|
|
interface ConverterInterface {
|
|
public function convert($path);
|
|
}
|
|
|
|
class Converter implements ConverterInterface {
|
|
public function convert($path) {
|
|
return $path;
|
|
}
|
|
}
|
|
|
|
// Bundle extension, Copyright Datenstrom, License GPLv2
|
|
|
|
class MinifyCss extends CSS { }
|
|
|
|
class MinifyJavaScript extends JS {
|
|
|
|
public function __construct() {
|
|
$this->keywordsReserved = array("do", "if", "in", "for", "let", "new", "try", "var", "case", "else", "enum", "eval", "null", "this", "true", "void", "with", "break", "catch", "class", "const", "false", "super", "throw", "while", "yield", "delete", "export", "import", "public", "return", "static", "switch", "typeof", "default", "extends", "finally", "package", "private", "continue", "debugger", "function", "arguments", "interface", "protected", "implements", "instanceof", "abstract", "boolean", "byte", "char", "double", "final", "float", "goto", "int", "long", "native", "short", "synchronized", "throws", "transient", "volatile");
|
|
$this->keywordsBefore = array("do", "in", "let", "new", "var", "case", "else", "enum", "void", "with", "class", "const", "yield", "delete", "export", "import", "public", "static", "typeof", "extends", "package", "private", "function", "protected", "implements", "instanceof");
|
|
$this->keywordsAfter = array("in", "public", "extends", "private", "protected", "implements", "instanceof");
|
|
$this->operators = array("+", "-", "*", "/", "%", "=", "+=", "-=", "*=", "/=", "%=", "<<=", ">>=", ">>>=", "&=", "^=", "|=", "&", "|", "^", "~", "<<", ">>", ">>>", "==", "===", "!=", "!==", ">", "<", ">=", "<=", "&&", "||", "!", ".", "[", "]", "?", ":", ",", ";", "(", ")", "{", "}");
|
|
$this->operatorsBefore = array("+", "-", "*", "/", "%", "=", "+=", "-=", "*=", "/=", "%=", "<<=", ">>=", ">>>=", "&=", "^=", "|=", "&", "|", "^", "~", "<<", ">>", ">>>", "==", "===", "!=", "!==", ">", "<", ">=", "<=", "&&", "||", "!", ".", "[", "?", ":", ",", ";", "(", "{");
|
|
$this->operatorsAfter = array("+", "-", "*", "/", "%", "=", "+=", "-=", "*=", "/=", "%=", "<<=", ">>=", ">>>=", "&=", "^=", "|=", "&", "|", "^", "<<", ">>", ">>>", "==", "===", "!=", "!==", ">", "<", ">=", "<=", "&&", "||", ".", "[", "]", "?", ":", ",", ";", "(", ")", "}");
|
|
}
|
|
|
|
// Minify data, add semicolon as separator between multiple files
|
|
public function execute($path = null) {
|
|
return parent::execute($path).";";
|
|
}
|
|
}
|
|
|
|
class MinifyBasic extends Minify {
|
|
|
|
// Minify data, remove only comments and empty lines
|
|
public function execute($path = null) {
|
|
$content = "";
|
|
$this->extractStrings("\'\"\`");
|
|
$this->registerPattern("/\/\*.*?\*\//s", "");
|
|
$this->registerPattern("/\/\/.*?[\r\n]+/", "");
|
|
$this->registerPattern("/[\r\n]+/", "");
|
|
foreach ($this->data as $source => $data) {
|
|
$content .= $this->replace($data);
|
|
}
|
|
return $this->restoreExtractedData($content);
|
|
}
|
|
}
|