Function applyDefaults

docs/tests/v2/es6/js/sanddance.js:134442–134488

(encode, type, role, style, config)

}

function applyDefaults(encode, type, role, style, config) {
  var defaults = {},
      enter = {},
      update,
      key,
      skip,
      props; // ignore legend and axis

  if (role == 'legend' || String(role).indexOf('axis') === 0) {
    role = null;
  } // resolve mark config


  props = role === _roles.FrameRole ? config.group : role === _roles.MarkRole ? (0, _vegaUtil.extend)({}, config.mark, config[type]) : null;

  for (key in props) {
    // do not apply defaults if relevant fields are defined
    skip = has(key, encode) || (key === 'fill' || key === 'stroke') && (has('fill', encode) || has('stroke', encode));
    if (!skip) applyDefault(defaults, key, props[key]);
  } // resolve styles, apply with increasing precedence


  (0, _vegaUtil.array)(style).forEach(function (name) {
    var props = config.style && config.style[name];

    for (var key in props) {
      if (!has(key, encode)) {
        applyDefault(defaults, key, props[key]);
      }
    }
  });
  encode = (0, _vegaUtil.extend)({}, encode); // defensive copy

  for (key in defaults) {
    props = defaults[key];

    if (props.signal) {
      (update = update || {})[key] = props;
    } else {
      enter[key] = props;
    }
  }

  encode.enter = (0, _vegaUtil.extend)(enter, encode.enter);
  if (update) encode.update = (0, _vegaUtil.extend)(update, encode.update);
  return encode;
}

function applyDefault(defaults, key, value) {
  defaults[key] = value && value.signal ? {