index.js 2.6 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", { value: true });
  3. exports.compilePseudoSelector = exports.aliases = exports.pseudos = exports.filters = void 0;
  4. /*
  5. * Pseudo selectors
  6. *
  7. * Pseudo selectors are available in three forms:
  8. *
  9. * 1. Filters are called when the selector is compiled and return a function
  10. * that has to return either false, or the results of `next()`.
  11. * 2. Pseudos are called on execution. They have to return a boolean.
  12. * 3. Subselects work like filters, but have an embedded selector that will be run separately.
  13. *
  14. * Filters are great if you want to do some pre-processing, or change the call order
  15. * of `next()` and your code.
  16. * Pseudos should be used to implement simple checks.
  17. */
  18. var boolbase_1 = require("boolbase");
  19. var css_what_1 = require("css-what");
  20. var filters_1 = require("./filters");
  21. Object.defineProperty(exports, "filters", { enumerable: true, get: function () { return filters_1.filters; } });
  22. var pseudos_1 = require("./pseudos");
  23. Object.defineProperty(exports, "pseudos", { enumerable: true, get: function () { return pseudos_1.pseudos; } });
  24. var aliases_1 = require("./aliases");
  25. Object.defineProperty(exports, "aliases", { enumerable: true, get: function () { return aliases_1.aliases; } });
  26. var subselects_1 = require("./subselects");
  27. function compilePseudoSelector(next, selector, options, context, compileToken) {
  28. var name = selector.name, data = selector.data;
  29. if (Array.isArray(data)) {
  30. return subselects_1.subselects[name](next, data, options, context, compileToken);
  31. }
  32. if (name in aliases_1.aliases) {
  33. if (data != null) {
  34. throw new Error("Pseudo ".concat(name, " doesn't have any arguments"));
  35. }
  36. // The alias has to be parsed here, to make sure options are respected.
  37. var alias = (0, css_what_1.parse)(aliases_1.aliases[name]);
  38. return subselects_1.subselects.is(next, alias, options, context, compileToken);
  39. }
  40. if (name in filters_1.filters) {
  41. return filters_1.filters[name](next, data, options, context);
  42. }
  43. if (name in pseudos_1.pseudos) {
  44. var pseudo_1 = pseudos_1.pseudos[name];
  45. (0, pseudos_1.verifyPseudoArgs)(pseudo_1, name, data);
  46. return pseudo_1 === boolbase_1.falseFunc
  47. ? boolbase_1.falseFunc
  48. : next === boolbase_1.trueFunc
  49. ? function (elem) { return pseudo_1(elem, options, data); }
  50. : function (elem) { return pseudo_1(elem, options, data) && next(elem); };
  51. }
  52. throw new Error("unmatched pseudo-class :".concat(name));
  53. }
  54. exports.compilePseudoSelector = compilePseudoSelector;