���ѧۧݧ�ӧ�� �ާ֧ߧ֧էا֧� - ���֧էѧܧ�ڧ��ӧѧ�� - /home/rickpfrv/wiki.craftaro.com/vendor/wikimedia/minify/src/CSSMin.php
���ѧ٧ѧ�
<?php /** * Copyright 2010 Trevor Parscal <tparscal@wikimedia.org> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * @file * @license Apache-2.0 */ namespace Wikimedia\Minify; use Net_URL2; /** * Transforms CSS data. * * This class provides minification, URL remapping, URL extracting, and data-URL embedding. */ class CSSMin { /** * Strip marker for comments */ private const PLACEHOLDER = "\x7fPLACEHOLDER\x7f"; /** * Maximum file size to embed in a stylesheet. * * Use of `@embed` is generally discouraged (see T121730, T118514, and T120984). * * In a nut shell: Stylesheets, and thus any images we embed inside of them, * are required to be fully downloaded by a browser before literally any content * or interface component can be rendered on-screen. Embedding an image means * you are saying it is more important to render this image than to render the * page content (or that it is undesirable to render even the first paragraph * of an article unless this image is also immediately there in the first paint). * * There are some cases where a small image can be worth embedding, for example * if the image's file size is comparable or smaller than to size of the URL from * which it would be lazy-loaded when CSS rules are applied. In that case, embedding * the file content in place of the web address could be an uncompromising win for * all users. * * To avoid mistakes and protect performance we put an arbitrary limit on this. * If a file is larger than this limit, it should probably be loaded using the * default CSS behaviour (by URL, without `@embed` instruction), or embedded as * SVG directly in the HTML response if it is such a vital part of the page. * * See encodeImageAsDataURI(). */ private const DATA_URI_SIZE_LIMIT = 32768; private const EMBED_REGEX = '\/\*\s*\@embed\s*\*\/'; private const COMMENT_REGEX = '\/\*.*?\*\/'; /** * List of common image files extensions and MIME-types */ private const MIME_TYPES = [ 'gif' => 'image/gif', 'jpe' => 'image/jpeg', 'jpeg' => 'image/jpeg', 'jpg' => 'image/jpeg', 'png' => 'image/png', 'tif' => 'image/tiff', 'tiff' => 'image/tiff', 'xbm' => 'image/x-xbitmap', 'svg' => 'image/svg+xml', ]; /** * Get a list of local files referenced in a stylesheet (includes non-existent files). * * @param string $source CSS stylesheet source to process * @param string $path File path where the source was read from * @return string[] List of local file references */ public static function getLocalFileReferences( $source, $path ) { $stripped = preg_replace( '/' . self::COMMENT_REGEX . '/s', '', $source ); $path = rtrim( $path, '/' ) . '/'; $files = []; $rFlags = PREG_OFFSET_CAPTURE | PREG_SET_ORDER; if ( preg_match_all( '/' . self::getUrlRegex() . '/J', $stripped, $matches, $rFlags ) ) { foreach ( $matches as $match ) { $url = $match['file'][0]; // Skip fully-qualified and protocol-relative URLs and data URIs if ( strpos( $url, '//' ) === 0 || parse_url( $url, PHP_URL_SCHEME ) ) { break; } // Strip trailing anchors - T115436 $anchor = strpos( $url, '#' ); if ( $anchor !== false ) { $url = substr( $url, 0, $anchor ); // '#some-anchors' is not a file if ( $url === '' ) { break; } } $files[] = $path . $url; } } return $files; } /** * Encode an image file as a data URI. * * If the image file has a suitable MIME type and size, encode it as a data URI, base64-encoded * for binary files or just percent-encoded otherwise. Return false if the image type is * unfamiliar or file exceeds the size limit. * * @param string $file Image file to encode. * @param string|null $type File's MIME type or null. If null, CSSMin will * try to autodetect the type. * @return string|false Image contents encoded as a data URI or false. */ public static function encodeImageAsDataURI( $file, $type = null ) { // Fast-fail for files that exceed the maximum data URI length if ( filesize( $file ) >= self::DATA_URI_SIZE_LIMIT ) { trigger_error( "File exceeds limit for embedded files: $file", E_USER_WARNING ); return false; } if ( $type === null ) { $type = self::getMimeType( $file ); } if ( !$type ) { return false; } return self::encodeStringAsDataURI( file_get_contents( $file ), $type ); } /** * Encode file contents as a data URI with chosen MIME type. * * The URI will be base64-encoded for binary files or just percent-encoded otherwise. * * @since 2.0.0 * @param string $contents File contents to encode. * @param string $type File's MIME type. * @return string Image contents encoded as a data URI or false. */ public static function encodeStringAsDataURI( $contents, $type ) { // Try #1: Non-encoded data URI // Remove XML declaration, it's not needed with data URI usage $contents = preg_replace( "/<\\?xml.*?\\?>/", '', $contents ); // The regular expression matches ASCII whitespace and printable characters. if ( preg_match( '/^[\r\n\t\x20-\x7e]+$/', $contents ) ) { // Do not base64-encode non-binary files (sensible SVGs). // (This often produces longer URLs, but they compress better, yielding a net smaller size.) $encoded = rawurlencode( $contents ); // Unencode some things that don't need to be encoded, to make the encoding smaller $encoded = strtr( $encoded, [ '%20' => ' ', // Unencode spaces '%2F' => '/', // Unencode slashes '%3A' => ':', // Unencode colons '%3D' => '=', // Unencode equals signs '%0A' => ' ', // Change newlines to spaces '%0D' => ' ', // Change carriage returns to spaces '%09' => ' ', // Change tabs to spaces ] ); // Consolidate runs of multiple spaces in a row $encoded = preg_replace( '/ {2,}/', ' ', $encoded ); // Remove leading and trailing spaces $encoded = trim( $encoded, ' ' ); $uri = 'data:' . $type . ',' . $encoded; return $uri; } // Try #2: Encoded data URI $uri = 'data:' . $type . ';base64,' . base64_encode( $contents ); return $uri; } /** * Serialize a string (escape and quote) for use as a CSS string value. * https://drafts.csswg.org/cssom/#serialize-a-string * * @param string $value * @return string */ public static function serializeStringValue( $value ) { $value = strtr( $value, [ "\0" => "\u{FFFD}", '\\' => '\\\\', '"' => '\\"' ] ); $value = preg_replace_callback( '/[\x01-\x1f\x7f]/', static function ( $match ) { return '\\' . base_convert( (string)ord( $match[0] ), 10, 16 ) . ' '; }, $value ); return '"' . $value . '"'; } /** * @param string $file * @return bool|string */ public static function getMimeType( $file ) { // Infer the MIME-type from the file extension $ext = strtolower( pathinfo( $file, PATHINFO_EXTENSION ) ); return self::MIME_TYPES[$ext] ?? mime_content_type( realpath( $file ) ); } /** * Build a CSS 'url()' value for the given URL, quoting parentheses (and other funny characters) * and escaping quotes as necessary. * * See http://www.w3.org/TR/css-syntax-3/#consume-a-url-token * * @param string $url URL to process * @return string 'url()' value, usually just `"url($url)"`, quoted/escaped if necessary */ public static function buildUrlValue( $url ) { // The list below has been crafted to match URLs such as: // scheme://user@domain:port/~user/fi%20le.png?query=yes&really=y+s // data:image/png;base64,R0lGODlh/+== if ( preg_match( '!^[\w:@/~.%+;,?&=-]+$!', $url ) ) { return "url($url)"; } else { return 'url("' . strtr( $url, [ '\\' => '\\\\', '"' => '\\"' ] ) . '")'; } } /** * Remaps CSS URL paths and automatically embeds data URIs for CSS rules * or url() values preceded by an `/ * @embed * /` comment. * * @param string $source CSS data to remap * @param string $local File path where the source was read from * @param string $remote Full URL to the file's directory (may be protocol-relative, trailing slash is optional) * @param bool $embedData If false, never do any data URI embedding, * even if `/ * @embed * /` is found. * @return string Remapped CSS data */ public static function remap( $source, $local, $remote, $embedData = true ) { // High-level overview: // * For each CSS rule in $source that includes at least one url() value: // * Check for an @embed comment at the start indicating that all URIs should be embedded // * For each url() value: // * Check for an @embed comment directly preceding the value // * If either @embed comment exists: // * Embedding the URL as data: URI, if it's possible / allowed // * Otherwise remap the URL to work in generated stylesheets // Guard against trailing slashes, because "some/remote/../foo.png" // resolves to "some/remote/foo.png" on (some?) clients (T29052). // But, don't turn "/" into "" since that is invalid as base URL (T282280). $remote = $remote === '/' ? $remote : rtrim( $remote, '/' ); // Disallow U+007F DELETE, which is illegal anyway, and which // we use for comment placeholders. $source = strtr( $source, "\x7f", "?" ); // Replace all comments by a placeholder so they will not interfere with the remapping. // Warning: This will also catch on anything looking like the start of a comment between // quotation marks (e.g. "foo /* bar"). $comments = []; $pattern = '/(?!' . self::EMBED_REGEX . ')(' . self::COMMENT_REGEX . ')/s'; $source = preg_replace_callback( $pattern, static function ( $match ) use ( &$comments ) { $comments[] = $match[ 0 ]; return self::PLACEHOLDER . ( count( $comments ) - 1 ) . 'x'; }, $source ); // Note: This will not correctly handle cases where ';', '{' or '}' // appears in the rule itself, e.g. in a quoted string. You are advised // not to use such characters in file names. We also match start/end of // the string to be consistent in edge-cases ('@import url(…)'). $pattern = '/(?:^|[;{])\K[^;{}]*' . self::getUrlRegex() . '[^;}]*(?=[;}]|$)/J'; $source = preg_replace_callback( $pattern, static function ( $matchOuter ) use ( $local, $remote, $embedData ) { $rule = $matchOuter[0]; // Check for global @embed comment and remove it. Allow other comments to be present // before @embed (they have been replaced with placeholders at this point). $embedAll = false; $rule = preg_replace( '/^((?:\s+|' . self::PLACEHOLDER . '(\d+)x)*)' . self::EMBED_REGEX . '\s*/', '$1', $rule, 1, $embedAll ); // Build two versions of current rule: with remapped URLs // and with embedded data: URIs (where possible). $pattern = '/(?P<embed>' . self::EMBED_REGEX . '\s*|)' . self::getUrlRegex() . '/J'; return preg_replace_callback( $pattern, static function ( $match ) use ( $local, $remote, $embedData, $embedAll ) { // For each url reference in the CSS, call remapOne() // to insert either a remapped URL or an embedded data URI. // We enable use of data URIs if both of these are true: // 1. The PHP caller enabled the option, // 2. and, the CSS declared `@embed` either above the rule // for all URLs inside that block, or above the individual // property for that one property. $embedOne = $embedData && ( $embedAll || $match['embed'] ); $remapped = self::remapOne( $match['file'], $match['query'], $local, $remote, $embedOne ); return self::buildUrlValue( $remapped ); }, $rule ); }, $source ); // Re-insert comments $pattern = '/' . self::PLACEHOLDER . '(\d+)x/'; $source = preg_replace_callback( $pattern, static function ( $match ) use ( &$comments ) { return $comments[ $match[1] ]; }, $source ); return $source; } /** * Is this CSS rule referencing a remote URL? * * @param string $maybeUrl * @return bool */ protected static function isRemoteUrl( $maybeUrl ) { return strpos( $maybeUrl, '//' ) === 0 || parse_url( $maybeUrl, PHP_URL_SCHEME ); } /** * Is this CSS rule referencing a local URL? * * @param string $maybeUrl * @return bool */ protected static function isLocalUrl( $maybeUrl ) { // Accept "/" (known local) // Accept "/anything" (known local) // Reject "//anything" (known remote) // Reject "" (invalid/uncertain) return $maybeUrl === '/' || ( isset( $maybeUrl[1] ) && $maybeUrl[0] === '/' && $maybeUrl[1] !== '/' ); } /** * @codeCoverageIgnore * @return string */ private static function getUrlRegex() { static $urlRegex; if ( $urlRegex === null ) { $urlRegex = '(' . // Unquoted url 'url\(\s*(?P<file>[^\s\'"][^\?\)]+?)(?P<query>\?[^\)]*?|)\s*\)' . // Single quoted url '|url\(\s*\'(?P<file>[^\?\']+?)(?P<query>\?[^\']*?|)\'\s*\)' . // Double quoted url '|url\(\s*"(?P<file>[^\?"]+?)(?P<query>\?[^"]*?|)"\s*\)' . ')'; } return $urlRegex; } /** * Resolve a possibly-relative URL against a base URL. * * @param string $base * @param string $url * @return string */ private static function resolveUrl( string $base, string $url ): string { // Net_URL2::resolve() doesn't allow for resolving against server-less URLs. // We need this as for MediaWiki/ResourceLoader, the remote base path may either // be separate (e.g. a separate domain), or simply local (like "/w"). In the // local case, we don't want to needlessly include the server in the output. $isServerless = self::isLocalUrl( $base ); if ( $isServerless ) { $base = "https://placeholder.invalid$base"; } // Net_URL2::resolve() doesn't allow for protocol-relative URLs, but we want to. $isProtoRelative = strpos( $base, '//' ) === 0; if ( $isProtoRelative ) { $base = "https:$base"; } $baseUrl = new Net_URL2( $base ); $ret = $baseUrl->resolve( $url ); if ( $isProtoRelative ) { $ret->setScheme( false ); } if ( $isServerless ) { $ret->setScheme( false ); $ret->setHost( false ); } return $ret->getURL(); } /** * Remap or embed a CSS URL path. * * @param string $file URL to remap/embed * @param string $query * @param string $local File path where the source was read from * @param string $remote Full URL to the file's directory (may be protocol-relative, trailing slash is optional) * @param bool $embed Whether to do any data URI embedding * @return string Remapped/embedded URL data */ public static function remapOne( $file, $query, $local, $remote, $embed ) { // The full URL possibly with query, as passed to the 'url()' value in CSS $url = $file . $query; // Expand local URLs with absolute paths to a full URL (possibly protocol-relative). if ( self::isLocalUrl( $url ) ) { return self::resolveUrl( $remote, $url ); } // Pass thru fully-qualified and protocol-relative URLs and data URIs, as well as local URLs if // we can't expand them. // Also skips anchors or the rare `behavior` property specifying application's default behavior if ( self::isRemoteUrl( $url ) || ( $url[0] ?? '' ) === '#' ) { return $url; } // The $remote must have a trailing slash beyond this point for correct path resolution. if ( ( $remote[-1] ?? '' ) !== '/' ) { $remote .= '/'; } if ( $local === false ) { // CSS specifies a path that is neither a local file path, nor a local URL. // It is probably already a fully-qualitied URL or data URI, but try to expand // it just in case. $url = self::resolveUrl( $remote, $url ); } else { // We drop the query part here and instead make the path relative to $remote $url = self::resolveUrl( $remote, $file ); // Path to the actual file on the filesystem $localFile = "{$local}/{$file}"; if ( file_exists( $localFile ) ) { if ( $embed ) { $data = self::encodeImageAsDataURI( $localFile ); if ( $data !== false ) { return $data; } } // Add version parameter as the first five hex digits // of the MD5 hash of the file's contents. $url .= '?' . substr( md5_file( $localFile ), 0, 5 ); } // If any of these conditions failed (file missing, we don't want to embed it // or it's not embeddable), return the URL (possibly with ?timestamp part) } return $url; } /** * Removes whitespace from CSS data * * @param string $css CSS data to minify * @return string Minified CSS data */ public static function minify( $css ) { return trim( str_replace( [ '; ', ': ', ' {', '{ ', ', ', '} ', ';}', '( ', ' )', '[ ', ' ]' ], [ ';', ':', '{', '{', ',', '}', '}', '(', ')', '[', ']' ], preg_replace( [ '/\s+/', '/\/\*.*?\*\//s' ], [ ' ', '' ], $css ) ) ); } } /** * @deprecated since 2.1.0 Use Wikimedia\Minify\CSSMin instead */ class_alias( CSSMin::class, 'CSSMin' );
| ver. 1.4 |
Github
|
.
| PHP 7.4.33 | ���֧ߧ֧�ѧ�ڧ� ����ѧߧڧ��: 0.1 |
proxy
|
phpinfo
|
���ѧ����ۧܧ�