source: frontend/node_modules/svgo/plugins/sortAttrs.js

'use strict';

exports.type = 'perItem';

exports.active = false;

exports.description = 'sorts element attributes (disabled by default)';

exports.params = {
        order: [
                'id',
                'width', 'height',
                'x', 'x1', 'x2',
                'y', 'y1', 'y2',
                'cx', 'cy', 'r',
                'fill', 'stroke', 'marker',
                'd', 'points'
        ]
};

/**
 * Sort element attributes for epic readability.
 *
 * @param {Object} item current iteration item
 * @param {Object} params plugin params
 *
 * @author Nikolay Frantsev
 */
exports.fn = function(item, params) {

        var attrs = [],
                sorted = {},
                orderlen = params.order.length + 1,
                xmlnsOrder = params.xmlnsOrder || 'front';

        if (item.elem) {

                item.eachAttr(function(attr) {
                        attrs.push(attr);
                });

                attrs.sort(function(a, b) {
                        if (a.prefix != b.prefix) {
                                // xmlns attributes implicitly have the prefix xmlns
                                if (xmlnsOrder == 'front') {
                    if (a.prefix == 'xmlns')
                        return -1;
                    if (b.prefix == 'xmlns')
                        return 1;
                }
                                return a.prefix < b.prefix ? -1 : 1;
                        }

                        var aindex = orderlen;
                        var bindex = orderlen;

                        for (var i = 0; i < params.order.length; i++) {
                                if (a.name == params.order[i]) {
                                        aindex = i;
                                } else if (a.name.indexOf(params.order[i] + '-') === 0) {
                                        aindex = i + .5;
                                }
                                if (b.name == params.order[i]) {
                                        bindex = i;
                                } else if (b.name.indexOf(params.order[i] + '-') === 0) {
                                        bindex = i + .5;
                                }
                        }

                        if (aindex != bindex) {
                                return aindex - bindex;
                        }
                        return a.name < b.name ? -1 : 1;
                });

                attrs.forEach(function (attr) {
                        sorted[attr.name] = attr;
                });

                item.attrs = sorted;

        }

};