jiaojiu/node_modules/css-what/lib/parse.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = parse;
var reName = /^[^\\]?(?:\\(?:[\da-f]{1,6}\s?|.)|[\w\-\u00b0-\uFFFF])+/;
var reEscape = /\\([\da-f]{1,6}\s?|(\s)|.)/gi;
// Modified version of https://github.com/jquery/sizzle/blob/master/src/sizzle.js#L87
var reAttr = /^\s*((?:\\.|[\w\u00b0-\uFFFF-])+)\s*(?:(\S?)=\s*(?:(['"])((?:[^\\]|\\[^])*?)\3|(#?(?:\\.|[\w\u00b0-\uFFFF-])*)|)|)\s*(i)?\]/;
var actionTypes = {
    undefined: "exists",
    "": "equals",
    "~": "element",
    "^": "start",
    $: "end",
    "*": "any",
    "!": "not",
    "|": "hyphen",
};
var Traversals = {
    ">": "child",
    "<": "parent",
    "~": "sibling",
    "+": "adjacent",
};
var attribSelectors = {
    "#": ["id", "equals"],
    ".": ["class", "element"],
};
// Pseudos, whose data property is parsed as well.
var unpackPseudos = new Set([
    "has",
    "not",
    "matches",
    "is",
    "host",
    "host-context",
]);
var stripQuotesFromPseudos = new Set(["contains", "icontains"]);
var quotes = new Set(['"', "'"]);
// Unescape function taken from https://github.com/jquery/sizzle/blob/master/src/sizzle.js#L152
function funescape(_, escaped, escapedWhitespace) {
    var high = parseInt(escaped, 16) - 0x10000;
    // NaN means non-codepoint
    return high !== high || escapedWhitespace
        ? escaped
        : high < 0
            ? // BMP codepoint
                String.fromCharCode(high + 0x10000)
            : // Supplemental Plane codepoint (surrogate pair)
                String.fromCharCode((high >> 10) | 0xd800, (high & 0x3ff) | 0xdc00);
}
function unescapeCSS(str) {
    return str.replace(reEscape, funescape);
}
function isWhitespace(c) {
    return c === " " || c === "\n" || c === "\t" || c === "\f" || c === "\r";
}
function parse(selector, options) {
    var subselects = [];
    selector = parseSelector(subselects, "" + selector, options);
    if (selector !== "") {
        throw new Error("Unmatched selector: " + selector);
    }
    return subselects;
}
function parseSelector(subselects, selector, options) {
    var _a, _b;
    if (options === void 0) { options = {}; }
    var tokens = [];
    var sawWS = false;
    function getName() {
        var match = selector.match(reName);
        if (!match) {
            throw new Error("Expected name, found " + selector);
        }
        var sub = match[0];
        selector = selector.substr(sub.length);
        return unescapeCSS(sub);
    }
    function stripWhitespace(start) {
        while (isWhitespace(selector.charAt(start)))
            start++;
        selector = selector.substr(start);
    }
    function isEscaped(pos) {
        var slashCount = 0;
        while (selector.charAt(--pos) === "\\")
            slashCount++;
        return (slashCount & 1) === 1;
    }
    stripWhitespace(0);
    while (selector !== "") {
        var firstChar = selector.charAt(0);
        if (isWhitespace(firstChar)) {
            sawWS = true;
            stripWhitespace(1);
        }
        else if (firstChar in Traversals) {
            tokens.push({ type: Traversals[firstChar] });
            sawWS = false;
            stripWhitespace(1);
        }
        else if (firstChar === ",") {
            if (tokens.length === 0) {
                throw new Error("Empty sub-selector");
            }
            subselects.push(tokens);
            tokens = [];
            sawWS = false;
            stripWhitespace(1);
        }
        else {
            if (sawWS) {
                if (tokens.length > 0) {
                    tokens.push({ type: "descendant" });
                }
                sawWS = false;
            }
            if (firstChar === "*") {
                selector = selector.substr(1);
                tokens.push({ type: "universal" });
            }
            else if (firstChar in attribSelectors) {
                var _c = attribSelectors[firstChar], name_1 = _c[0], action = _c[1];
                selector = selector.substr(1);
                tokens.push({
                    type: "attribute",
                    name: name_1,
                    action: action,
                    value: getName(),
                    ignoreCase: false,
                });
            }
            else if (firstChar === "[") {
                selector = selector.substr(1);
                var attributeMatch = selector.match(reAttr);
                if (!attributeMatch) {
                    throw new Error("Malformed attribute selector: " + selector);
                }
                var completeSelector = attributeMatch[0], baseName = attributeMatch[1], actionType = attributeMatch[2], _d = attributeMatch[4], quotedValue = _d === void 0 ? "" : _d, _e = attributeMatch[5], value = _e === void 0 ? quotedValue : _e, ignoreCase = attributeMatch[6];
                selector = selector.substr(completeSelector.length);
                var name_2 = unescapeCSS(baseName);
                if ((_a = options.lowerCaseAttributeNames) !== null && _a !== void 0 ? _a : !options.xmlMode) {
                    name_2 = name_2.toLowerCase();
                }
                tokens.push({
                    type: "attribute",
                    name: name_2,
                    action: actionTypes[actionType],
                    value: unescapeCSS(value),
                    ignoreCase: !!ignoreCase,
                });
            }
            else if (firstChar === ":") {
                if (selector.charAt(1) === ":") {
                    selector = selector.substr(2);
                    tokens.push({
                        type: "pseudo-element",
                        name: getName().toLowerCase(),
                    });
                    continue;
                }
                selector = selector.substr(1);
                var name_3 = getName().toLowerCase();
                var data = null;
                if (selector.startsWith("(")) {
                    if (unpackPseudos.has(name_3)) {
                        var quot = selector.charAt(1);
                        var quoted = quotes.has(quot);
                        selector = selector.substr(quoted ? 2 : 1);
                        data = [];
                        selector = parseSelector(data, selector, options);
                        if (quoted) {
                            if (!selector.startsWith(quot)) {
                                throw new Error("Unmatched quotes in :" + name_3);
                            }
                            else {
                                selector = selector.substr(1);
                            }
                        }
                        if (!selector.startsWith(")")) {
                            throw new Error("Missing closing parenthesis in :" + name_3 + " (" + selector + ")");
                        }
                        selector = selector.substr(1);
                    }
                    else {
                        var pos = 1;
                        var counter = 1;
                        for (; counter > 0 && pos < selector.length; pos++) {
                            if (selector.charAt(pos) === "(" &&
                                !isEscaped(pos)) {
                                counter++;
                            }
                            else if (selector.charAt(pos) === ")" &&
                                !isEscaped(pos)) {
                                counter--;
                            }
                        }
                        if (counter) {
                            throw new Error("Parenthesis not matched");
                        }
                        data = selector.substr(1, pos - 2);
                        selector = selector.substr(pos);
                        if (stripQuotesFromPseudos.has(name_3)) {
                            var quot = data.charAt(0);
                            if (quot === data.slice(-1) && quotes.has(quot)) {
                                data = data.slice(1, -1);
                            }
                            data = unescapeCSS(data);
                        }
                    }
                }
                tokens.push({ type: "pseudo", name: name_3, data: data });
            }
            else if (reName.test(selector)) {
                var name_4 = getName();
                if ((_b = options.lowerCaseTags) !== null && _b !== void 0 ? _b : !options.xmlMode) {
                    name_4 = name_4.toLowerCase();
                }
                tokens.push({ type: "tag", name: name_4 });
            }
            else {
                if (tokens.length &&
                    tokens[tokens.length - 1].type === "descendant") {
                    tokens.pop();
                }
                addToken(subselects, tokens);
                return selector;
            }
        }
    }
    addToken(subselects, tokens);
    return selector;
}
function addToken(subselects, tokens) {
    if (subselects.length > 0 && tokens.length === 0) {
        throw new Error("Empty sub-selector");
    }
    subselects.push(tokens);
}