aaac7fed
 liuqimichale
add
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module.exports = function cleanAtrule(node, item, list) {
if (node.block) {
// otherwise removed at-rule don't prevent @import for removal
this.root.firstAtrulesAllowed = false;
if (node.block.type === 'Block' && node.block.declarations.isEmpty()) {
list.remove(item);
return;
}
if (node.block.type === 'StyleSheet' && node.block.rules.isEmpty()) {
list.remove(item);
return;
}
}
switch (node.name) {
case 'charset':
if (node.expression.sequence.isEmpty()) {
list.remove(item);
return;
}
// if there is any rule before @charset -> remove it
if (item.prev) {
list.remove(item);
return;
}
break;
case 'import':
if (!this.root.firstAtrulesAllowed) {
list.remove(item);
return;
}
// if there are some rules that not an @import or @charset before @import
// remove it
list.prevUntil(item.prev, function(rule) {
if (rule.type === 'Atrule') {
if (rule.name === 'import' || rule.name === 'charset') {
return;
}
}
this.root.firstAtrulesAllowed = false;
list.remove(item);
return true;
}, this);
break;
}
};
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