/**
* Compiles the path
*
* @param Context $context
* @return UrlNode
*/
public function compilePath(Context $context)
{
$path = $this->path->compile($context);
if (!$path instanceof UrlNode) {
$rootPath = $this->currentFileInfo && $this->currentFileInfo->rootPath ? $this->currentFileInfo->rootPath : false;
if ($rootPath) {
$pathValue = $path->value;
// Add the base path if the import is relative
if ($pathValue && Util::isPathRelative($pathValue)) {
$path->value = $rootPath . $pathValue;
}
}
$path->value = Util::normalizePath($path->value);
}
return $path;
}
/**
* Inlines a resource and falls back to url() if the ieCompat option is on
* and the resource is too large, or if you use the function in the browser.
* If the mime is not given then node uses the mime package to determine the correct mime type.
*
* @param Node $mimeType A mime type string
* @param Node $url The URL of the file to inline.
* @return UrlNode
* @throws IOException
*/
public function dataUri(Node $mimeType, Node $filePath = null)
{
if (func_num_args() < 2) {
$path = $mimeType->value;
$mime = false;
// we will detect it later
} else {
$path = $filePath->value;
$mime = $mimeType->value;
}
$path = $this->getFilePath($path);
list($fragment, $path) = Util::getFragmentAndPath($path);
if ($mime === false) {
$mime = Mime::lookup($path);
if ($mime === 'image/svg+xml') {
$useBase64 = false;
} else {
// use base 64 unless it's an ASCII or UTF-8 format
$charset = Mime::charsetsLookup($mime);
$useBase64 = !in_array($charset, ['US-ASCII', 'UTF-8']);
}
if ($useBase64) {
$mime .= ';base64';
}
} else {
$useBase64 = (bool) preg_match('/;base64$/', $mime);
}
// the file was not found
// FIXME: warn
if (!is_readable($path)) {
$url = new UrlNode($filePath ? $filePath : $mimeType, 0, $this->context->currentFileInfo);
return $url->compile($this->context);
}
$buffer = file_get_contents($path);
$buffer = $useBase64 ? base64_encode($buffer) : Util::encodeURIComponent($buffer);
$uri = "data:" . $mime . ',' . $buffer . $fragment;
// IE8 cannot handle a data-uri larger than 32KB. If this is exceeded
// and the ieCompat option is enabled, return normal url() instead.
if ($this->context->ieCompat) {
if (strlen($uri) >= self::IE8_DATA_URI_MAX) {
// FIXME: warn that we cannot use data uri here
// FIXME: we don't have access to current index here!
$url = new UrlNode($filePath ? $filePath : $mimeType);
return $url->compile($this->context);
}
}
// FIXME: we don't have any information about current index here!
return new UrlNode(new QuotedNode('"' . $uri . '"', $uri, false));
}
