break-props.js 3.2 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 Declaration = require('../declaration');
  7. var BreakProps = function (_Declaration) {
  8. _inherits(BreakProps, _Declaration);
  9. function BreakProps() {
  10. _classCallCheck(this, BreakProps);
  11. return _possibleConstructorReturn(this, _Declaration.apply(this, arguments));
  12. }
  13. /**
  14. * Change name for -webkit- and -moz- prefix
  15. */
  16. BreakProps.prototype.prefixed = function prefixed(prop, prefix) {
  17. return prefix + 'column-' + prop;
  18. };
  19. /**
  20. * Return property name by final spec
  21. */
  22. BreakProps.prototype.normalize = function normalize(prop) {
  23. if (prop.indexOf('inside') !== -1) {
  24. return 'break-inside';
  25. } else if (prop.indexOf('before') !== -1) {
  26. return 'break-before';
  27. } else {
  28. return 'break-after';
  29. }
  30. };
  31. /**
  32. * Change prefixed value for avoid-column and avoid-page
  33. */
  34. BreakProps.prototype.set = function set(decl, prefix) {
  35. if (decl.prop === 'break-inside' && decl.value === 'avoid-column' || decl.value === 'avoid-page') {
  36. decl.value = 'avoid';
  37. }
  38. return _Declaration.prototype.set.call(this, decl, prefix);
  39. };
  40. /**
  41. * Don’t prefix some values
  42. */
  43. BreakProps.prototype.insert = function insert(decl, prefix, prefixes) {
  44. if (decl.prop !== 'break-inside') {
  45. return _Declaration.prototype.insert.call(this, decl, prefix, prefixes);
  46. } else if (/region/i.test(decl.value) || /page/i.test(decl.value)) {
  47. return undefined;
  48. } else {
  49. return _Declaration.prototype.insert.call(this, decl, prefix, prefixes);
  50. }
  51. };
  52. return BreakProps;
  53. }(Declaration);
  54. Object.defineProperty(BreakProps, 'names', {
  55. enumerable: true,
  56. writable: true,
  57. value: ['break-inside', 'page-break-inside', 'column-break-inside', 'break-before', 'page-break-before', 'column-break-before', 'break-after', 'page-break-after', 'column-break-after']
  58. });
  59. module.exports = BreakProps;