postcss-less/lib/tokenizer/find-end-of-expression.js

LESS parser for PostCSS

import {closedCurlyBracket, closedParenthesis, openedCurlyBracket, openedParenthesis, semicolon} from './globals';

export default function findEndOfExpression (css, length, i) {
    let openedParenthesisBlocks = 0;
    let openedCurlyBlocks = 0;

    for (; i < length; ++i) {
        const symbolCode = css[i].charCodeAt(0);

        // find the on of escaped expression
        if (
            !openedParenthesisBlocks && !openedCurlyBlocks &&
            (symbolCode === semicolon || symbolCode === closedCurlyBracket)
        ) {
            return i - 1;
        }

        switch (symbolCode) {
            case openedCurlyBracket:
                openedCurlyBlocks++;
                break;

            case closedCurlyBracket:
                openedCurlyBlocks--;
                break;

            case openedParenthesis:
                openedParenthesisBlocks++;
                break;

            case closedParenthesis:
                openedParenthesisBlocks--;
                break;

            default:
                break;
        }
    }

    return -1;
}