scss-extract/lib/serialize.js

Extract structured variables from scss files. Fast and accurate.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.serialize = serialize;

var _sass = require('sass');

var _sass2 = _interopRequireDefault(_sass);

var _util = require('./util');

var _parseColor = require('parse-color');

var _parseColor2 = _interopRequireDefault(_parseColor);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Serialize a given sass color into a color name like 'white', an rgba(r,g,b,a), or #000000 string
 * based on the color provided
 */
function serializeColor(sassColor) {
  var alpha = Math.round(sassColor.getA() * 100) / 100;
  var r = Math.round(sassColor.getR());
  var g = Math.round(sassColor.getG());
  var b = Math.round(sassColor.getB());

  if (alpha < 0.999) {
    return 'rgba(' + r + ',' + g + ',' + b + ',' + alpha + ')';
  }

  var hex = '#' + (0, _util.toColorHex)(r) + (0, _util.toColorHex)(g) + (0, _util.toColorHex)(b);
  var parsedColor = (0, _parseColor2.default)(hex);
  if (parsedColor.keyword != null) {
    return parsedColor.keyword;
  }
  return hex;
}

/**
 * Transform a SassValue into a serialized string
 */
function serializeValue(sassValue, isInList) {
  if (sassValue instanceof _sass2.default.types.Boolean || sassValue instanceof _sass2.default.types.String) {
    return '' + sassValue.getValue();
  }
  if (sassValue instanceof _sass2.default.types.Number) {
    return '' + sassValue.getValue() + sassValue.getUnit();
  }
  if (sassValue instanceof _sass2.default.types.Color) {
    return serializeColor(sassValue);
  }
  if (sassValue instanceof _sass2.default.types.Null) {
    return 'null';
  }
  if (sassValue instanceof _sass2.default.types.List) {
    var listLength = sassValue.getLength();
    var listElement = [];
    var hasSeparator = sassValue.getSeparator();
    for (var i = 0; i < listLength; i++) {
      listElement.push(serialize(sassValue.getValue(i), true));
    }
    // Make sure nested lists are serialized with surrounding parenthesis
    if (isInList) {
      return '(' + listElement.join(hasSeparator ? ',' : ' ') + ')';
    }
    return '' + listElement.join(hasSeparator ? ',' : ' ');
  }
  if (sassValue instanceof _sass2.default.types.Map) {
    var mapLength = sassValue.getLength();
    var mapValue = {};
    for (var _i = 0; _i < mapLength; _i++) {
      var key = serialize(sassValue.getKey(_i));
      var value = serialize(sassValue.getValue(_i));
      mapValue[key] = value;
    }
    var serializedMapValues = Object.keys(mapValue).map(function (key) {
      return key + ': ' + mapValue[key];
    });
    return '(' + serializedMapValues + ')';
  }

  throw new Error('Unsupported sass variable type \'' + sassValue.constructor.name + '\'');
}

/**
 * Create a serialized string from a sassValue object
 */
function serialize(sassValue, isInList) {
  return serializeValue(sassValue, isInList);
}