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Diffstat (limited to 'admin/survey/minify/lib/Minify/CSS/UriRewriter.php')
| -rw-r--r-- | admin/survey/minify/lib/Minify/CSS/UriRewriter.php | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/admin/survey/minify/lib/Minify/CSS/UriRewriter.php b/admin/survey/minify/lib/Minify/CSS/UriRewriter.php new file mode 100644 index 0000000..6f69908 --- /dev/null +++ b/admin/survey/minify/lib/Minify/CSS/UriRewriter.php @@ -0,0 +1,358 @@ +<?php
+/**
+ * Class Minify_CSS_UriRewriter
+ * @package Minify
+ */
+
+/**
+ * Rewrite file-relative URIs as root-relative in CSS files
+ *
+ * @package Minify
+ * @author Stephen Clay <steve@mrclay.org>
+ */
+class Minify_CSS_UriRewriter
+{
+
+ /**
+ * rewrite() and rewriteRelative() append debugging information here
+ *
+ * @var string
+ */
+ public static $debugText = '';
+
+ /**
+ * In CSS content, rewrite file relative URIs as root relative
+ *
+ * @param string $css
+ *
+ * @param string $currentDir The directory of the current CSS file.
+ *
+ * @param string $docRoot The document root of the web site in which
+ * the CSS file resides (default = $_SERVER['DOCUMENT_ROOT']).
+ *
+ * @param array $symlinks (default = array()) If the CSS file is stored in
+ * a symlink-ed directory, provide an array of link paths to
+ * target paths, where the link paths are within the document root. Because
+ * paths need to be normalized for this to work, use "//" to substitute
+ * the doc root in the link paths (the array keys). E.g.:
+ * <code>
+ * array('//symlink' => '/real/target/path') // unix
+ * array('//static' => 'D:\\staticStorage') // Windows
+ * </code>
+ *
+ * @return string
+ */
+ public static function rewrite($css, $currentDir, $docRoot = null, $symlinks = array())
+ {
+ self::$_docRoot = self::_realpath(
+ $docRoot ? $docRoot : $_SERVER['DOCUMENT_ROOT']
+ );
+ self::$_currentDir = self::_realpath($currentDir);
+ self::$_symlinks = array();
+
+ // normalize symlinks in order to map to link
+ foreach ($symlinks as $link => $target) {
+ $link = ($link === '//') ? self::$_docRoot : str_replace('//', self::$_docRoot . '/', $link);
+ $link = strtr($link, '/', DIRECTORY_SEPARATOR);
+
+ self::$_symlinks[$link] = self::_realpath($target);
+ }
+
+ self::$debugText .= "docRoot : " . self::$_docRoot . "\n"
+ . "currentDir : " . self::$_currentDir . "\n";
+ if (self::$_symlinks) {
+ self::$debugText .= "symlinks : " . var_export(self::$_symlinks, 1) . "\n";
+ }
+ self::$debugText .= "\n";
+
+ $css = self::_trimUrls($css);
+
+ $css = self::_owlifySvgPaths($css);
+
+ // rewrite
+ $pattern = '/@import\\s+([\'"])(.*?)[\'"]/';
+ $css = preg_replace_callback($pattern, array(self::$className, '_processUriCB'), $css);
+
+ $pattern = '/url\\(\\s*([\'"](.*?)[\'"]|[^\\)\\s]+)\\s*\\)/';
+ $css = preg_replace_callback($pattern, array(self::$className, '_processUriCB'), $css);
+
+ $css = self::_unOwlify($css);
+
+ return $css;
+ }
+
+ /**
+ * In CSS content, prepend a path to relative URIs
+ *
+ * @param string $css
+ *
+ * @param string $path The path to prepend.
+ *
+ * @return string
+ */
+ public static function prepend($css, $path)
+ {
+ self::$_prependPath = $path;
+
+ $css = self::_trimUrls($css);
+
+ $css = self::_owlifySvgPaths($css);
+
+ // append
+ $pattern = '/@import\\s+([\'"])(.*?)[\'"]/';
+ $css = preg_replace_callback($pattern, array(self::$className, '_processUriCB'), $css);
+
+ $pattern = '/url\\(\\s*([\'"](.*?)[\'"]|[^\\)\\s]+)\\s*\\)/';
+ $css = preg_replace_callback($pattern, array(self::$className, '_processUriCB'), $css);
+
+ $css = self::_unOwlify($css);
+
+ self::$_prependPath = null;
+
+ return $css;
+ }
+
+ /**
+ * Get a root relative URI from a file relative URI
+ *
+ * <code>
+ * Minify_CSS_UriRewriter::rewriteRelative(
+ * '../img/hello.gif'
+ * , '/home/user/www/css' // path of CSS file
+ * , '/home/user/www' // doc root
+ * );
+ * // returns '/img/hello.gif'
+ *
+ * // example where static files are stored in a symlinked directory
+ * Minify_CSS_UriRewriter::rewriteRelative(
+ * 'hello.gif'
+ * , '/var/staticFiles/theme'
+ * , '/home/user/www'
+ * , array('/home/user/www/static' => '/var/staticFiles')
+ * );
+ * // returns '/static/theme/hello.gif'
+ * </code>
+ *
+ * @param string $uri file relative URI
+ *
+ * @param string $realCurrentDir realpath of the current file's directory.
+ *
+ * @param string $realDocRoot realpath of the site document root.
+ *
+ * @param array $symlinks (default = array()) If the file is stored in
+ * a symlink-ed directory, provide an array of link paths to
+ * real target paths, where the link paths "appear" to be within the document
+ * root. E.g.:
+ * <code>
+ * array('/home/foo/www/not/real/path' => '/real/target/path') // unix
+ * array('C:\\htdocs\\not\\real' => 'D:\\real\\target\\path') // Windows
+ * </code>
+ *
+ * @return string
+ */
+ public static function rewriteRelative($uri, $realCurrentDir, $realDocRoot, $symlinks = array())
+ {
+ // prepend path with current dir separator (OS-independent)
+ $path = strtr($realCurrentDir, '/', DIRECTORY_SEPARATOR);
+ $path .= DIRECTORY_SEPARATOR . strtr($uri, '/', DIRECTORY_SEPARATOR);
+
+ self::$debugText .= "file-relative URI : {$uri}\n"
+ . "path prepended : {$path}\n";
+
+ // "unresolve" a symlink back to doc root
+ foreach ($symlinks as $link => $target) {
+ if (0 === strpos($path, $target)) {
+ // replace $target with $link
+ $path = $link . substr($path, strlen($target));
+
+ self::$debugText .= "symlink unresolved : {$path}\n";
+
+ break;
+ }
+ }
+ // strip doc root
+ $path = substr($path, strlen($realDocRoot));
+
+ self::$debugText .= "docroot stripped : {$path}\n";
+
+ // fix to root-relative URI
+ $uri = strtr($path, '/\\', '//');
+ $uri = self::removeDots($uri);
+
+ self::$debugText .= "traversals removed : {$uri}\n\n";
+
+ return $uri;
+ }
+
+ /**
+ * Remove instances of "./" and "../" where possible from a root-relative URI
+ *
+ * @param string $uri
+ *
+ * @return string
+ */
+ public static function removeDots($uri)
+ {
+ $uri = str_replace('/./', '/', $uri);
+ // inspired by patch from Oleg Cherniy
+ do {
+ $uri = preg_replace('@/[^/]+/\\.\\./@', '/', $uri, 1, $changed);
+ } while ($changed);
+
+ return $uri;
+ }
+
+ /**
+ * Defines which class to call as part of callbacks, change this
+ * if you extend Minify_CSS_UriRewriter
+ *
+ * @var string
+ */
+ protected static $className = 'Minify_CSS_UriRewriter';
+
+ /**
+ * Get realpath with any trailing slash removed. If realpath() fails,
+ * just remove the trailing slash.
+ *
+ * @param string $path
+ *
+ * @return mixed path with no trailing slash
+ */
+ protected static function _realpath($path)
+ {
+ $realPath = realpath($path);
+ if ($realPath !== false) {
+ $path = $realPath;
+ }
+
+ return rtrim($path, '/\\');
+ }
+
+ /**
+ * Directory of this stylesheet
+ *
+ * @var string
+ */
+ private static $_currentDir = '';
+
+ /**
+ * DOC_ROOT
+ *
+ * @var string
+ */
+ private static $_docRoot = '';
+
+ /**
+ * directory replacements to map symlink targets back to their
+ * source (within the document root) E.g. '/var/www/symlink' => '/var/realpath'
+ *
+ * @var array
+ */
+ private static $_symlinks = array();
+
+ /**
+ * Path to prepend
+ *
+ * @var string
+ */
+ private static $_prependPath = null;
+
+ /**
+ * @param string $css
+ *
+ * @return string
+ */
+ private static function _trimUrls($css)
+ {
+ $pattern = '/
+ url\\( # url(
+ \\s*
+ ([^\\)]+?) # 1 = URI (assuming does not contain ")")
+ \\s*
+ \\) # )
+ /x';
+
+ return preg_replace($pattern, 'url($1)', $css);
+ }
+
+ /**
+ * @param array $m
+ *
+ * @return string
+ */
+ private static function _processUriCB($m)
+ {
+ // $m matched either '/@import\\s+([\'"])(.*?)[\'"]/' or '/url\\(\\s*([^\\)\\s]+)\\s*\\)/'
+ $isImport = ($m[0][0] === '@');
+ // determine URI and the quote character (if any)
+ if ($isImport) {
+ $quoteChar = $m[1];
+ $uri = $m[2];
+ } else {
+ // $m[1] is either quoted or not
+ $quoteChar = ($m[1][0] === "'" || $m[1][0] === '"') ? $m[1][0] : '';
+
+ $uri = ($quoteChar === '') ? $m[1] : substr($m[1], 1, strlen($m[1]) - 2);
+ }
+
+ if ($uri === '') {
+ return $m[0];
+ }
+
+ // if not root/scheme relative and not starts with scheme
+ if (!preg_match('~^(/|[a-z]+\:)~', $uri)) {
+ // URI is file-relative: rewrite depending on options
+ if (self::$_prependPath === null) {
+ $uri = self::rewriteRelative($uri, self::$_currentDir, self::$_docRoot, self::$_symlinks);
+ } else {
+ $uri = self::$_prependPath . $uri;
+ if ($uri[0] === '/') {
+ $root = '';
+ $rootRelative = $uri;
+ $uri = $root . self::removeDots($rootRelative);
+ } elseif (preg_match('@^((https?\:)?//([^/]+))/@', $uri, $m) && (false !== strpos($m[3], '.'))) {
+ $root = $m[1];
+ $rootRelative = substr($uri, strlen($root));
+ $uri = $root . self::removeDots($rootRelative);
+ }
+ }
+ }
+
+ if ($isImport) {
+ return "@import {$quoteChar}{$uri}{$quoteChar}";
+ } else {
+ return "url({$quoteChar}{$uri}{$quoteChar})";
+ }
+ }
+
+ /**
+ * Mungs some inline SVG URL declarations so they won't be touched
+ *
+ * @link https://github.com/mrclay/minify/issues/517
+ * @see _unOwlify
+ *
+ * @param string $css
+ * @return string
+ */
+ private static function _owlifySvgPaths($css)
+ {
+ $pattern = '~\b((?:clip-path|mask|-webkit-mask)\s*\:\s*)url(\(\s*#\w+\s*\))~';
+
+ return preg_replace($pattern, '$1owl$2', $css);
+ }
+
+ /**
+ * Undo work of _owlify
+ *
+ * @see _owlifySvgPaths
+ *
+ * @param string $css
+ * @return string
+ */
+ private static function _unOwlify($css)
+ {
+ $pattern = '~\b((?:clip-path|mask|-webkit-mask)\s*\:\s*)owl~';
+
+ return preg_replace($pattern, '$1url', $css);
+ }
+}
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