/**
* Import macros from templates
*
* @param Tokenizer $tokens
* @param Template $tpl
* @throws UnexpectedTokenException
* @throws InvalidUsageException
* @return string
*/
public static function tagImport(Tokenizer $tokens, Template $tpl)
{
$import = array();
if ($tokens->is('[')) {
$tokens->next();
while ($tokens->valid()) {
if ($tokens->is(Tokenizer::MACRO_STRING)) {
$import[$tokens->current()] = true;
$tokens->next();
} elseif ($tokens->is(']')) {
$tokens->next();
break;
} elseif ($tokens->is(',')) {
$tokens->next();
} else {
break;
}
}
if ($tokens->current() != "from") {
throw new UnexpectedTokenException($tokens);
}
$tokens->next();
}
$tpl->parsePlainArg($tokens, $name);
if (!$name) {
throw new InvalidUsageException("Invalid usage tag {import}");
}
if ($tokens->is(T_AS)) {
$alias = $tokens->next()->get(Tokenizer::MACRO_STRING);
if ($alias === "macro") {
$alias = "";
}
$tokens->next();
} else {
$alias = "";
}
$donor = $tpl->getStorage()->getRawTemplate()->load($name, true);
if ($donor->macros) {
foreach ($donor->macros as $name => $macro) {
if ($p = strpos($name, ".")) {
$name = substr($name, $p);
}
if ($import && !isset($import[$name])) {
continue;
}
if ($alias) {
$name = $alias . '.' . $name;
}
$tpl->macros[$name] = $macro;
}
$tpl->addDepend($donor);
}
return '';
}
