svgo/plugins/removeNonInheritableGroupAttrs.js at master · kaij/svgo · GitHub

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'use strict';

exports.type = 'perItem';

exports.active = true;

var inheritableAttrs = require('./_collections').inheritableAttrs,
    attrsGroups = require('./_collections').attrsGroups,
    excludedAttrs = ['display', 'opacity'];

/**
 * Remove non-inheritable group's "presentation" attributes.
 *
 * @param {Object} item current iteration item
 * @return {Boolean} if false, item will be filtered out
 *
 * @author Kir Belevich
 */
exports.fn = function(item) {

    if (item.isElem('g')) {

        item.eachAttr(function(attr) {
            if (
                ~attrsGroups.presentation.indexOf(attr.name) &&
                ~attrsGroups.graphicalEvent.indexOf(attr.name) &&
                ~attrsGroups.core.indexOf(attr.name) &&
                ~attrsGroups.conditionalProcessing.indexOf(attr.name) &&
                !~excludedAttrs.indexOf(attr.name) &&
                !~inheritableAttrs.indexOf(attr.name)
            ) {
                item.removeAttr(attr.name);
            }
        });

    }

};