GoScrobble/web/node_modules/svgo/plugins/removeUselessDefs.js

54 lines
1.1 KiB
JavaScript

'use strict';
exports.type = 'perItem';
exports.active = true;
exports.description = 'removes elements in <defs> without id';
var nonRendering = require('./_collections').elemsGroups.nonRendering;
/**
* Removes content of defs and properties that aren't rendered directly without ids.
*
* @param {Object} item current iteration item
* @return {Boolean} if false, item will be filtered out
*
* @author Lev Solntsev
*/
exports.fn = function(item) {
if (item.isElem('defs')) {
if (item.content) {
item.content = getUsefulItems(item, []);
}
if (item.isEmpty()) return false;
} else if (item.isElem(nonRendering) && !item.hasAttr('id')) {
return false;
}
};
function getUsefulItems(item, usefulItems) {
item.content.forEach(function(child) {
if (child.hasAttr('id') || child.isElem('style')) {
usefulItems.push(child);
child.parentNode = item;
} else if (!child.isEmpty()) {
child.content = getUsefulItems(child, usefulItems);
}
});
return usefulItems;
}