function is_allowed_media($media_list)
{
// Now we've got the list of media this style can be applied to;
// check if at least one of this media types is being used by the script
//
$allowed_media = config_get_allowed_media();
$allowed_found = false;
foreach ($media_list as $media) {
$allowed_found |= array_search($media, $allowed_media) !== false;
}
return $allowed_found;
}
function is_allowed_media($media_list)
{
// Now we've got the list of media this style can be applied to;
// check if at least one of this media types is being used by the script
//
$allowed_media = config_get_allowed_media();
$allowed_found = false;
// Note that media names should be case-insensitive;
// it is not guaranteed that $media_list contains lower-case variants,
// as well as it is not guaranteed that configuration data contains them.
// Thus, media name lists should be explicitly converted to lowercase
$media_list = array_map('strtolower', $media_list);
$allowed_media = array_map('strtolower', $allowed_media);
foreach ($media_list as $media) {
$allowed_found |= array_search($media, $allowed_media) !== false;
}
return $allowed_found;
}
function parse_css($css, &$pipeline, $baseindex = 0)
{
$allowed_media = implode("|", config_get_allowed_media());
// remove the UTF8 byte-order mark from the beginning of the file (several high-order symbols at the beginning)
$pos = 0;
$len = strlen($css);
while (ord($css[$pos]) > 127 && $pos < $len) {
$pos++;
}
$css = substr($css, $pos);
// Process @media rules;
// basic syntax is:
// @media <media>(,<media>)* { <rules> }
//
while (preg_match("/^(.*?)@media([^{]+){(.*)\$/s", $css, $matches)) {
$head = $matches[1];
$media = $matches[2];
$rest = $matches[3];
// Process CSS rules placed before the first @media declaration - they should be applied to
// all media types
//
$this->parse_css_media($head, $pipeline, $baseindex);
// Extract the media content
if (!preg_match("/^((?:[^{}]*{[^{}]*})*)[^{}]*\\s*}(.*)\$/s", $rest, $matches)) {
die("CSS media syntax error\n");
} else {
$content = $matches[1];
$tail = $matches[2];
}
// Check if this media is to be processed
if (preg_match("/" . $allowed_media . "/i", $media)) {
$this->parse_css_media($content, $pipeline, $baseindex);
}
// Process the rest of CSS file
$css = $tail;
}
// The rest of CSS file belogs to common media, process it too
$this->parse_css_media($css, $pipeline, $baseindex);
}
