'use strict';

exports.__esModule = true;
/**
 * Contains helpers for safely splitting lists of CSS values,
 * preserving parentheses and quotes.
 *
 * @example
 * const list = postcss.list;
 *
 * @namespace list
 */
var list = {
    split: function split(string, separators, last) {
        var array = [];
        var current = '';
        var split = false;

        var func = 0;
        var quote = false;
        var escape = false;

        for (var i = 0; i < string.length; i++) {
            var letter = string[i];

            if (quote) {
                if (escape) {
                    escape = false;
                } else if (letter === '\\') {
                    escape = true;
                } else if (letter === quote) {
                    quote = false;
                }
            } else if (letter === '"' || letter === '\'') {
                quote = letter;
            } else if (letter === '(') {
                func += 1;
            } else if (letter === ')') {
                if (func > 0) func -= 1;
            } else if (func === 0) {
                if (separators.indexOf(letter) !== -1) split = true;
            }

            if (split) {
                if (current !== '') array.push(current.trim());
                current = '';
                split = false;
            } else {
                current += letter;
            }
        }

        if (last || current !== '') array.push(current.trim());
        return array;
    },


    /**
     * Safely splits space-separated values (such as those for `background`,
     * `border-radius`, and other shorthand properties).
     *
     * @param {string} string - space-separated values
     *
     * @return {string[]} split values
     *
     * @example
     * postcss.list.space('1px calc(10% + 1px)') //=> ['1px', 'calc(10% + 1px)']
     */
    space: function space(string) {
        var spaces = [' ', '\n', '\t'];
        return list.split(string, spaces);
    },


    /**
     * Safely splits comma-separated values (such as those for `transition-*`
     * and `background` properties).
     *
     * @param {string} string - comma-separated values
     *
     * @return {string[]} split values
     *
     * @example
     * postcss.list.comma('black, linear-gradient(white, black)')
     * //=> ['black', 'linear-gradient(white, black)']
     */
    comma: function comma(string) {
        var comma = ',';
        return list.split(string, [comma], true);
    }
};

exports.default = list;
module.exports = exports['default'];
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