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