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Viewing / Editing File: compile.js

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.compileToken = exports.compileUnsafe = exports.compile = void 0;
var css_what_1 = require("css-what");
var boolbase_1 = require("boolbase");
var sort_1 = __importDefault(require("./sort"));
var procedure_1 = require("./procedure");
var general_1 = require("./general");
var subselects_1 = require("./pseudo-selectors/subselects");
/**
 * Compiles a selector to an executable function.
 *
 * @param selector Selector to compile.
 * @param options Compilation options.
 * @param context Optional context for the selector.
 */
function compile(selector, options, context) {
    var next = compileUnsafe(selector, options, context);
    return (0, subselects_1.ensureIsTag)(next, options.adapter);
}
exports.compile = compile;
function compileUnsafe(selector, options, context) {
    var token = typeof selector === "string" ? (0, css_what_1.parse)(selector, options) : selector;
    return compileToken(token, options, context);
}
exports.compileUnsafe = compileUnsafe;
function includesScopePseudo(t) {
    return (t.type === "pseudo" &&
        (t.name === "scope" ||
            (Array.isArray(t.data) &&
                t.data.some(function (data) { return data.some(includesScopePseudo); }))));
}
var DESCENDANT_TOKEN = { type: "descendant" };
var FLEXIBLE_DESCENDANT_TOKEN = {
    type: "_flexibleDescendant",
};
var SCOPE_TOKEN = { type: "pseudo", name: "scope", data: null };
/*
 * CSS 4 Spec (Draft): 3.3.1. Absolutizing a Scope-relative Selector
 * http://www.w3.org/TR/selectors4/#absolutizing
 */
function absolutize(token, _a, context) {
    var adapter = _a.adapter;
    // TODO Use better check if the context is a document
    var hasContext = !!(context === null || context === void 0 ? void 0 : context.every(function (e) {
        var parent = adapter.isTag(e) && adapter.getParent(e);
        return e === subselects_1.PLACEHOLDER_ELEMENT || (parent && adapter.isTag(parent));
    }));
    for (var _i = 0, token_1 = token; _i < token_1.length; _i++) {
        var t = token_1[_i];
        if (t.length > 0 && (0, procedure_1.isTraversal)(t[0]) && t[0].type !== "descendant") {
            // Don't continue in else branch
        }
        else if (hasContext && !t.some(includesScopePseudo)) {
            t.unshift(DESCENDANT_TOKEN);
        }
        else {
            continue;
        }
        t.unshift(SCOPE_TOKEN);
    }
}
function compileToken(token, options, context) {
    var _a;
    token = token.filter(function (t) { return t.length > 0; });
    token.forEach(sort_1.default);
    context = (_a = options.context) !== null && _a !== void 0 ? _a : context;
    var isArrayContext = Array.isArray(context);
    var finalContext = context && (Array.isArray(context) ? context : [context]);
    absolutize(token, options, finalContext);
    var shouldTestNextSiblings = false;
    var query = token
        .map(function (rules) {
        if (rules.length >= 2) {
            var first = rules[0], second = rules[1];
            if (first.type !== "pseudo" || first.name !== "scope") {
                // Ignore
            }
            else if (isArrayContext && second.type === "descendant") {
                rules[1] = FLEXIBLE_DESCENDANT_TOKEN;
            }
            else if (second.type === "adjacent" ||
                second.type === "sibling") {
                shouldTestNextSiblings = true;
            }
        }
        return compileRules(rules, options, finalContext);
    })
        .reduce(reduceRules, boolbase_1.falseFunc);
    query.shouldTestNextSiblings = shouldTestNextSiblings;
    return query;
}
exports.compileToken = compileToken;
function compileRules(rules, options, context) {
    var _a;
    return rules.reduce(function (previous, rule) {
        return previous === boolbase_1.falseFunc
            ? boolbase_1.falseFunc
            : (0, general_1.compileGeneralSelector)(previous, rule, options, context, compileToken);
    }, (_a = options.rootFunc) !== null && _a !== void 0 ? _a : boolbase_1.trueFunc);
}
function reduceRules(a, b) {
    if (b === boolbase_1.falseFunc || a === boolbase_1.trueFunc) {
        return a;
    }
    if (a === boolbase_1.falseFunc || b === boolbase_1.trueFunc) {
        return b;
    }
    return function combine(elem) {
        return a(elem) || b(elem);
    };
}

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