mirror of
https://github.com/vichan-devel/vichan.git
synced 2024-11-27 08:50:59 +01:00
311 lines
9.6 KiB
PHP
Executable File
311 lines
9.6 KiB
PHP
Executable File
<?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
|
|
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);
|
|
|
|
// rewrite
|
|
$css = preg_replace_callback('/@import\\s+([\'"])(.*?)[\'"]/'
|
|
,array(self::$className, '_processUriCB'), $css);
|
|
$css = preg_replace_callback('/url\\(\\s*([^\\)\\s]+)\\s*\\)/'
|
|
,array(self::$className, '_processUriCB'), $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);
|
|
|
|
// append
|
|
$css = preg_replace_callback('/@import\\s+([\'"])(.*?)[\'"]/'
|
|
,array(self::$className, '_processUriCB'), $css);
|
|
$css = preg_replace_callback('/url\\(\\s*([^\\)\\s]+)\\s*\\)/'
|
|
,array(self::$className, '_processUriCB'), $css);
|
|
|
|
self::$_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)
|
|
. 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)
|
|
{
|
|
return preg_replace('/
|
|
url\\( # url(
|
|
\\s*
|
|
([^\\)]+?) # 1 = URI (assuming does not contain ")")
|
|
\\s*
|
|
\\) # )
|
|
/x', '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);
|
|
}
|
|
// analyze URI
|
|
if ('/' !== $uri[0] // root-relative
|
|
&& false === strpos($uri, '//') // protocol (non-data)
|
|
&& 0 !== strpos($uri, 'data:') // data protocol
|
|
) {
|
|
// URI is file-relative: rewrite depending on options
|
|
if (self::$_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);
|
|
}
|
|
}
|
|
}
|
|
return $isImport
|
|
? "@import {$quoteChar}{$uri}{$quoteChar}"
|
|
: "url({$quoteChar}{$uri}{$quoteChar})";
|
|
}
|
|
}
|