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'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _postcssValueParser = require('postcss-value-parser');
var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);
var _parser = require('./parser');
var _reducer = require('./lib/reducer');
var _reducer2 = _interopRequireDefault(_reducer);
var _stringifier = require('./lib/stringifier');
var _stringifier2 = _interopRequireDefault(_stringifier);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
// eslint-disable-line
var MATCH_CALC = /((?:\-[a-z]+\-)?calc)/;
exports.default = function (value) {
var precision = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 5;
return (0, _postcssValueParser2.default)(value).walk(function (node) {
// skip anything which isn't a calc() function
if (node.type !== 'function' || !MATCH_CALC.test(node.value)) return;
// stringify calc expression and produce an AST
var contents = _postcssValueParser2.default.stringify(node.nodes);
// skip constant() and env()
if (contents.indexOf('constant') >= 0 || contents.indexOf('env') >= 0) return;
var ast = _parser.parser.parse(contents);
// reduce AST to its simplest form, that is, either to a single value
// or a simplified calc expression
var reducedAst = (0, _reducer2.default)(ast, precision);
// stringify AST and write it back
node.type = 'word';
node.value = (0, _stringifier2.default)(node.value, reducedAst, precision);
}, true).toString();
};
module.exports = exports['default'];