87 lines
3.7 KiB
JavaScript
87 lines
3.7 KiB
JavaScript
var hasOwnProperty = Object.prototype.hasOwnProperty;
|
|
var walk = require('css-tree').walk;
|
|
|
|
function cleanUnused(selectorList, usageData) {
|
|
selectorList.children.each(function(selector, item, list) {
|
|
var shouldRemove = false;
|
|
|
|
walk(selector, function(node) {
|
|
// ignore nodes in nested selectors
|
|
if (this.selector === null || this.selector === selectorList) {
|
|
switch (node.type) {
|
|
case 'SelectorList':
|
|
// TODO: remove toLowerCase when pseudo selectors will be normalized
|
|
// ignore selectors inside :not()
|
|
if (this['function'] === null || this['function'].name.toLowerCase() !== 'not') {
|
|
if (cleanUnused(node, usageData)) {
|
|
shouldRemove = true;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 'ClassSelector':
|
|
if (usageData.whitelist !== null &&
|
|
usageData.whitelist.classes !== null &&
|
|
!hasOwnProperty.call(usageData.whitelist.classes, node.name)) {
|
|
shouldRemove = true;
|
|
}
|
|
if (usageData.blacklist !== null &&
|
|
usageData.blacklist.classes !== null &&
|
|
hasOwnProperty.call(usageData.blacklist.classes, node.name)) {
|
|
shouldRemove = true;
|
|
}
|
|
break;
|
|
|
|
case 'IdSelector':
|
|
if (usageData.whitelist !== null &&
|
|
usageData.whitelist.ids !== null &&
|
|
!hasOwnProperty.call(usageData.whitelist.ids, node.name)) {
|
|
shouldRemove = true;
|
|
}
|
|
if (usageData.blacklist !== null &&
|
|
usageData.blacklist.ids !== null &&
|
|
hasOwnProperty.call(usageData.blacklist.ids, node.name)) {
|
|
shouldRemove = true;
|
|
}
|
|
break;
|
|
|
|
case 'TypeSelector':
|
|
// TODO: remove toLowerCase when type selectors will be normalized
|
|
// ignore universal selectors
|
|
if (node.name.charAt(node.name.length - 1) !== '*') {
|
|
if (usageData.whitelist !== null &&
|
|
usageData.whitelist.tags !== null &&
|
|
!hasOwnProperty.call(usageData.whitelist.tags, node.name.toLowerCase())) {
|
|
shouldRemove = true;
|
|
}
|
|
if (usageData.blacklist !== null &&
|
|
usageData.blacklist.tags !== null &&
|
|
hasOwnProperty.call(usageData.blacklist.tags, node.name.toLowerCase())) {
|
|
shouldRemove = true;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
});
|
|
|
|
if (shouldRemove) {
|
|
list.remove(item);
|
|
}
|
|
});
|
|
|
|
return selectorList.children.isEmpty();
|
|
}
|
|
|
|
module.exports = function cleanRuleset(node, item, list, options) {
|
|
var usageData = options.usage;
|
|
|
|
if (usageData && (usageData.whitelist !== null || usageData.blacklist !== null)) {
|
|
cleanUnused(node.prelude, usageData);
|
|
}
|
|
|
|
if (node.prelude.children.isEmpty() ||
|
|
node.block.children.isEmpty()) {
|
|
list.remove(item);
|
|
}
|
|
};
|