flex-shrink.js 2.7 KB

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  1. 'use strict';
  2. function _defaults(obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; }
  3. function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  4. function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
  5. function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : _defaults(subClass, superClass); }
  6. var flexSpec = require('./flex-spec');
  7. var Declaration = require('../declaration');
  8. var FlexShrink = function (_Declaration) {
  9. _inherits(FlexShrink, _Declaration);
  10. function FlexShrink() {
  11. _classCallCheck(this, FlexShrink);
  12. return _possibleConstructorReturn(this, _Declaration.apply(this, arguments));
  13. }
  14. /**
  15. * Return property name by final spec
  16. */
  17. FlexShrink.prototype.normalize = function normalize() {
  18. return 'flex-shrink';
  19. };
  20. /**
  21. * Return flex property for 2012 spec
  22. */
  23. FlexShrink.prototype.prefixed = function prefixed(prop, prefix) {
  24. var spec = void 0;
  25. var _flexSpec = flexSpec(prefix);
  26. spec = _flexSpec[0];
  27. prefix = _flexSpec[1];
  28. if (spec === 2012) {
  29. return prefix + 'flex-negative';
  30. } else {
  31. return _Declaration.prototype.prefixed.call(this, prop, prefix);
  32. }
  33. };
  34. /**
  35. * Ignore 2009 spec and use flex property for 2012
  36. */
  37. FlexShrink.prototype.set = function set(decl, prefix) {
  38. var spec = void 0;
  39. var _flexSpec2 = flexSpec(prefix);
  40. spec = _flexSpec2[0];
  41. prefix = _flexSpec2[1];
  42. if (spec === 2012 || spec === 'final') {
  43. return _Declaration.prototype.set.call(this, decl, prefix);
  44. }
  45. return undefined;
  46. };
  47. return FlexShrink;
  48. }(Declaration);
  49. Object.defineProperty(FlexShrink, 'names', {
  50. enumerable: true,
  51. writable: true,
  52. value: ['flex-shrink', 'flex-negative']
  53. });
  54. module.exports = FlexShrink;