node_modules/css-select/lib/sort.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.isTraversal = void 0;
var css_what_1 = require("css-what");
var procedure = new Map([
    [css_what_1.SelectorType.Universal, 50],
    [css_what_1.SelectorType.Tag, 30],
    [css_what_1.SelectorType.Attribute, 1],
    [css_what_1.SelectorType.Pseudo, 0],
]);
function isTraversal(token) {
    return !procedure.has(token.type);
}
exports.isTraversal = isTraversal;
var attributes = new Map([
    [css_what_1.AttributeAction.Exists, 10],
    [css_what_1.AttributeAction.Equals, 8],
    [css_what_1.AttributeAction.Not, 7],
    [css_what_1.AttributeAction.Start, 6],
    [css_what_1.AttributeAction.End, 6],
    [css_what_1.AttributeAction.Any, 5],
]);
/**
 * 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 _a, _b;
    var proc = (_a = procedure.get(token.type)) !== null && _a !== void 0 ? _a : -1;
    if (token.type === css_what_1.SelectorType.Attribute) {
        proc = (_b = attributes.get(token.action)) !== null && _b !== void 0 ? _b : 4;
        if (token.action === css_what_1.AttributeAction.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 === css_what_1.SelectorType.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)) {
            // Eg. :matches, :not
            proc = Math.min.apply(Math, token.data.map(function (d) { return Math.min.apply(Math, d.map(getProcedure)); }));
            // If we have traversals, try to avoid executing this selector
            if (proc < 0) {
                proc = 0;
            }
        }
        else {
            proc = 2;
        }
    }
    return proc;
}
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