<?php
/**
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * Copyright 2010 Wikimedia Foundation
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * 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
*
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- * http://www.gnu.org/copyleft/gpl.html
+ * 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.
*/
/**
* Transforms CSS data
- *
+ *
* This class provides minification, URL remapping, URL extracting, and data-URL embedding.
- *
- * @author Trevor Parscal
+ *
+ * @file
+ * @version 0.1.1 -- 2010-09-11
+ * @author Trevor Parscal <tparscal@wikimedia.org>
+ * @copyright Copyright 2010 Wikimedia Foundation
+ * @license http://www.apache.org/licenses/LICENSE-2.0
*/
class CSSMin {
-
+
/* Constants */
-
+
/**
* Maximum file size to still qualify for in-line embedding as a data-URI
*
- * 24,576 is used because Internet Explorer has a 32,768 byte limit for data URIs, which when base64 encoded will
- * result in a 1/3 increase in size.
+ * 24,576 is used because Internet Explorer has a 32,768 byte limit for data URIs,
+ * which when base64 encoded will result in a 1/3 increase in size.
*/
const EMBED_SIZE_LIMIT = 24576;
- const URL_REGEX = 'url\([\'"]?(?<file>[^\?\)\:\'"]*)\??[^\)\'"]*[\'"]?\)';
-
+ const URL_REGEX = 'url\(\s*[\'"]?(?P<file>[^\?\)\'"]*)(?P<query>\??[^\)\'"]*)[\'"]?\s*\)';
+
/* Protected Static Members */
-
+
/** @var array List of common image files extensions and mime-types */
protected static $mimeTypes = array(
'gif' => 'image/gif',
'tiff' => 'image/tiff',
'xbm' => 'image/x-xbitmap',
);
-
+
/* Static Methods */
-
+
/**
* Gets a list of local file paths which are referenced in a CSS style sheet
*
*/
public static function getLocalFileReferences( $source, $path = null ) {
$files = array();
- if ( preg_match_all( '/' . self::URL_REGEX . '/', $source, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER ) ) {
+ $rFlags = PREG_OFFSET_CAPTURE | PREG_SET_ORDER;
+ if ( preg_match_all( '/' . self::URL_REGEX . '/', $source, $matches, $rFlags ) ) {
foreach ( $matches as $match ) {
- $file = ( isset( $path ) ? rtrim( $path, '/' ) . '/' : '' ) . "{$match['file'][0]}";
+ $file = ( isset( $path )
+ ? rtrim( $path, '/' ) . '/'
+ : '' ) . "{$match['file'][0]}";
// Only proceed if we can access the file
- if ( file_exists( $file ) ) {
+ if ( !is_null( $path ) && file_exists( $file ) ) {
$files[] = $file;
}
}
}
return $files;
}
-
+
+ /**
+ * @param $file string
+ * @return bool|string
+ */
+ protected static function getMimeType( $file ) {
+ $realpath = realpath( $file );
+ // Try a couple of different ways to get the mime-type of a file, in order of
+ // preference
+ if (
+ $realpath
+ && function_exists( 'finfo_file' )
+ && function_exists( 'finfo_open' )
+ && defined( 'FILEINFO_MIME_TYPE' )
+ ) {
+ // As of PHP 5.3, this is how you get the mime-type of a file; it uses the Fileinfo
+ // PECL extension
+ return finfo_file( finfo_open( FILEINFO_MIME_TYPE ), $realpath );
+ } elseif ( function_exists( 'mime_content_type' ) ) {
+ // Before this was deprecated in PHP 5.3, this was how you got the mime-type of a file
+ return mime_content_type( $file );
+ } else {
+ // Worst-case scenario has happened, use the file extension to infer the mime-type
+ $ext = strtolower( pathinfo( $file, PATHINFO_EXTENSION ) );
+ if ( isset( self::$mimeTypes[$ext] ) ) {
+ return self::$mimeTypes[$ext];
+ }
+ }
+ return false;
+ }
+
/**
- * Remaps CSS URL paths and automatically embeds data URIs for URL rules preceded by an /* @embed * / comment
+ * Remaps CSS URL paths and automatically embeds data URIs for URL rules
+ * preceded by an /* @embed * / comment
*
* @param $source string CSS data to remap
- * @param $path string File path where the source was read from
+ * @param $local string File path where the source was read from
+ * @param $remote string URL path to the file
+ * @param $embedData bool If false, never do any data URI embedding, even if / * @embed * / is found
* @return string Remapped CSS data
*/
- public static function remap( $source, $path, $embed = true ) {
- $pattern = '/((?<embed>\s*\/\*\s*\@embed\s*\*\/)(?<pre>[^\;\}]*))?' . self::URL_REGEX . '(?<post>[^;]*)[\;]?/';
+ public static function remap( $source, $local, $remote, $embedData = true ) {
+ $pattern = '/((?P<embed>\s*\/\*\s*\@embed\s*\*\/)(?P<pre>[^\;\}]*))?' .
+ self::URL_REGEX . '(?P<post>[^;]*)[\;]?/';
$offset = 0;
while ( preg_match( $pattern, $source, $match, PREG_OFFSET_CAPTURE, $offset ) ) {
+ // Skip fully-qualified URLs and data URIs
+ $urlScheme = parse_url( $match['file'][0], PHP_URL_SCHEME );
+ if ( $urlScheme ) {
+ // Move the offset to the end of the match, leaving it alone
+ $offset = $match[0][1] + strlen( $match[0][0] );
+ continue;
+ }
+ // URLs with absolute paths like /w/index.php need to be expanded
+ // to absolute URLs but otherwise left alone
+ if ( $match['file'][0] !== '' && $match['file'][0][0] === '/' ) {
+ // Replace the file path with an expanded (possibly protocol-relative) URL
+ // ...but only if wfExpandUrl() is even available.
+ // This will not be the case if we're running outside of MW
+ $lengthIncrease = 0;
+ if ( function_exists( 'wfExpandUrl' ) ) {
+ $expanded = wfExpandUrl( $match['file'][0], PROTO_RELATIVE );
+ $origLength = strlen( $match['file'][0] );
+ $lengthIncrease = strlen( $expanded ) - $origLength;
+ $source = substr_replace( $source, $expanded,
+ $match['file'][1], $origLength
+ );
+ }
+ // Move the offset to the end of the match, leaving it alone
+ $offset = $match[0][1] + strlen( $match[0][0] ) + $lengthIncrease;
+ continue;
+ }
// Shortcuts
$embed = $match['embed'][0];
$pre = $match['pre'][0];
$post = $match['post'][0];
- $file = "{$path}/{$match['file'][0]}";
- // Only proceed if we can access the file
- if ( file_exists( $file ) ) {
- // Add version parameter as a time-stamp in ISO 8601 format, using Z for the timezone, meaning GMT
- $url = "{$file}?" . gmdate( 'Y-m-d\TH:i:s\Z', round( filemtime( $file ), -2 ) );
- // If we the mime-type can't be determined, no embedding will take place
- $type = false;
- // Try a couple of different ways to get the mime-type of a file, in order of preference
- if ( function_exists( 'finfo_file' ) && function_exists( 'finfo_open' ) ) {
- // As of PHP 5.3, this is how you get the mime-type of a file; it uses the Fileinfo PECL extension
- $type = finfo_file( finfo_open( FILEINFO_MIME_TYPE ), $file );
- } else if ( function_exists( 'mime_content_type' ) ) {
- // Before this was deprecated in PHP 5.3, this used to be how you get the mime-type of a file
- $type = mime_content_type( $file );
- } else {
- // Worst-case scenario has happend, use the file extension to infer the mime-type
- $ext = strtolower( pathinfo( $file, PATHINFO_EXTENSION ) );
- if ( isset( self::$mimeTypes[$ext] ) ) {
- $type = self::$mimeTypes[$ext];
+ $query = $match['query'][0];
+ $url = "{$remote}/{$match['file'][0]}";
+ $file = "{$local}/{$match['file'][0]}";
+ // bug 27052 - Guard against double slashes, because foo//../bar
+ // apparently resolves to foo/bar on (some?) clients
+ $url = preg_replace( '#([^:])//+#', '\1/', $url );
+ $replacement = false;
+ if ( $local !== false && file_exists( $file ) ) {
+ // Add version parameter as a time-stamp in ISO 8601 format,
+ // using Z for the timezone, meaning GMT
+ $url .= '?' . gmdate( 'Y-m-d\TH:i:s\Z', round( filemtime( $file ), -2 ) );
+ // Embedding requires a bit of extra processing, so let's skip that if we can
+ if ( $embedData && $embed ) {
+ $type = self::getMimeType( $file );
+ // Detect when URLs were preceeded with embed tags, and also verify file size is
+ // below the limit
+ if (
+ $type
+ && $match['embed'][1] > 0
+ && filesize( $file ) < self::EMBED_SIZE_LIMIT
+ ) {
+ // Strip off any trailing = symbols (makes browsers freak out)
+ $data = base64_encode( file_get_contents( $file ) );
+ // Build 2 CSS properties; one which uses a base64 encoded data URI in place
+ // of the @embed comment to try and retain line-number integrity, and the
+ // other with a remapped an versioned URL and an Internet Explorer hack
+ // making it ignored in all browsers that support data URIs
+ $replacement = "{$pre}url(data:{$type};base64,{$data}){$post};";
+ $replacement .= "{$pre}url({$url}){$post}!ie;";
}
}
- // Detect when URLs were preceeded with embed tags, and also verify file size is below the limit
- if ( $embed && $type && $match['embed'][1] > 0 && filesize( $file ) < self::EMBED_SIZE_LIMIT ) {
- // Strip off any trailing = symbols (makes browsers freak out)
- $data = base64_encode( file_get_contents( $file ) );
- // Build 2 CSS properties; one which uses a base64 encoded data URI in place of the @embed
- // comment to try and retain line-number integrity , and the other with a remapped an versioned
- // URL and an Internet Explorer hack making it ignored in all browsers that support data URIs
- $replacement = "{$pre}url(data:{$type};base64,{$data}){$post};{$pre}url({$url}){$post}!ie;";
- } else {
- // Build a CSS property with a remapped and versioned URL, preserving comment for debug mode
+ if ( $replacement === false ) {
+ // Assume that all paths are relative to $remote, and make them absolute
$replacement = "{$embed}{$pre}url({$url}){$post};";
}
-
+ } elseif ( $local === false ) {
+ // Assume that all paths are relative to $remote, and make them absolute
+ $replacement = "{$embed}{$pre}url({$url}{$query}){$post};";
+ }
+ if ( $replacement !== false ) {
// Perform replacement on the source
- $source = substr_replace( $source, $replacement, $match[0][1], strlen( $match[0][0] ) );
+ $source = substr_replace(
+ $source, $replacement, $match[0][1], strlen( $match[0][0] )
+ );
// Move the offset to the end of the replacement in the source
$offset = $match[0][1] + strlen( $replacement );
continue;
}
return $source;
}
-
+
/**
* Removes whitespace from CSS data
*
- * @param $source string CSS data to minify
+ * @param $css string CSS data to minify
* @return string Minified CSS data
*/
public static function minify( $css ) {
dépôts / lhc / web / wiklou.git / blobdiff