"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); var procedure_1 = require("./procedure"); var attributes = { exists: 10, equals: 8, not: 7, start: 6, end: 6, any: 5, hyphen: 4, element: 4, }; /** * Sort the parts of the passed selector, * as there is potential for optimization * (some types of selectors are faster than others) * * @param arr Selector to sort */ function sortByProcedure(arr) { var procs = arr.map(getProcedure); for (var i = 1; i < arr.length; i++) { var procNew = procs[i]; if (procNew < 0) continue; for (var j = i - 1; j >= 0 && procNew < procs[j]; j--) { var token = arr[j + 1]; arr[j + 1] = arr[j]; arr[j] = token; procs[j + 1] = procs[j]; procs[j] = procNew; } } } exports.default = sortByProcedure; function getProcedure(token) { var proc = procedure_1.procedure[token.type]; if (token.type === "attribute") { proc = attributes[token.action]; if (proc === attributes.equals && token.name === "id") { // Prefer ID selectors (eg. #ID) proc = 9; } if (token.ignoreCase) { /* * IgnoreCase adds some overhead, prefer "normal" token * this is a binary operation, to ensure it's still an int */ proc >>= 1; } } else if (token.type === "pseudo") { if (!token.data) { proc = 3; } else if (token.name === "has" || token.name === "contains") { proc = 0; // Expensive in any case } else if (Array.isArray(token.data)) { // "matches" and "not" proc = 0; for (var i = 0; i < token.data.length; i++) { // TODO better handling of complex selectors if (token.data[i].length !== 1) continue; var cur = getProcedure(token.data[i][0]); // Avoid executing :has or :contains if (cur === 0) { proc = 0; break; } if (cur > proc) proc = cur; } if (token.data.length > 1 && proc > 0) proc -= 1; } else { proc = 1; } } return proc; }