selector.js 4.0 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 _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _defaults(subClass, superClass); }
  4. var OldSelector = require('./old-selector');
  5. var Prefixer = require('./prefixer');
  6. var Browsers = require('./browsers');
  7. var utils = require('./utils');
  8. var Selector =
  9. /*#__PURE__*/
  10. function (_Prefixer) {
  11. _inheritsLoose(Selector, _Prefixer);
  12. function Selector(name, prefixes, all) {
  13. var _this;
  14. _this = _Prefixer.call(this, name, prefixes, all) || this;
  15. _this.regexpCache = {};
  16. return _this;
  17. }
  18. /**
  19. * Is rule selectors need to be prefixed
  20. */
  21. var _proto = Selector.prototype;
  22. _proto.check = function check(rule) {
  23. if (rule.selector.indexOf(this.name) !== -1) {
  24. return !!rule.selector.match(this.regexp());
  25. }
  26. return false;
  27. }
  28. /**
  29. * Return prefixed version of selector
  30. */
  31. ;
  32. _proto.prefixed = function prefixed(prefix) {
  33. return this.name.replace(/^([^\w]*)/, "$1" + prefix);
  34. }
  35. /**
  36. * Lazy loadRegExp for name
  37. */
  38. ;
  39. _proto.regexp = function regexp(prefix) {
  40. if (this.regexpCache[prefix]) {
  41. return this.regexpCache[prefix];
  42. }
  43. var name = prefix ? this.prefixed(prefix) : this.name;
  44. this.regexpCache[prefix] = new RegExp("(^|[^:\"'=])" + utils.escapeRegexp(name), 'gi');
  45. return this.regexpCache[prefix];
  46. }
  47. /**
  48. * All possible prefixes
  49. */
  50. ;
  51. _proto.possible = function possible() {
  52. return Browsers.prefixes();
  53. }
  54. /**
  55. * Return all possible selector prefixes
  56. */
  57. ;
  58. _proto.prefixeds = function prefixeds(rule) {
  59. if (rule._autoprefixerPrefixeds) {
  60. return rule._autoprefixerPrefixeds;
  61. }
  62. var prefixeds = {};
  63. for (var _iterator = this.possible(), _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
  64. var _ref;
  65. if (_isArray) {
  66. if (_i >= _iterator.length) break;
  67. _ref = _iterator[_i++];
  68. } else {
  69. _i = _iterator.next();
  70. if (_i.done) break;
  71. _ref = _i.value;
  72. }
  73. var prefix = _ref;
  74. prefixeds[prefix] = this.replace(rule.selector, prefix);
  75. }
  76. rule._autoprefixerPrefixeds = prefixeds;
  77. return rule._autoprefixerPrefixeds;
  78. }
  79. /**
  80. * Is rule already prefixed before
  81. */
  82. ;
  83. _proto.already = function already(rule, prefixeds, prefix) {
  84. var index = rule.parent.index(rule) - 1;
  85. while (index >= 0) {
  86. var before = rule.parent.nodes[index];
  87. if (before.type !== 'rule') {
  88. return false;
  89. }
  90. var some = false;
  91. for (var key in prefixeds) {
  92. var prefixed = prefixeds[key];
  93. if (before.selector === prefixed) {
  94. if (prefix === key) {
  95. return true;
  96. } else {
  97. some = true;
  98. break;
  99. }
  100. }
  101. }
  102. if (!some) {
  103. return false;
  104. }
  105. index -= 1;
  106. }
  107. return false;
  108. }
  109. /**
  110. * Replace selectors by prefixed one
  111. */
  112. ;
  113. _proto.replace = function replace(selector, prefix) {
  114. return selector.replace(this.regexp(), "$1" + this.prefixed(prefix));
  115. }
  116. /**
  117. * Clone and add prefixes for at-rule
  118. */
  119. ;
  120. _proto.add = function add(rule, prefix) {
  121. var prefixeds = this.prefixeds(rule);
  122. if (this.already(rule, prefixeds, prefix)) {
  123. return;
  124. }
  125. var cloned = this.clone(rule, {
  126. selector: prefixeds[prefix]
  127. });
  128. rule.parent.insertBefore(rule, cloned);
  129. }
  130. /**
  131. * Return function to fast find prefixed selector
  132. */
  133. ;
  134. _proto.old = function old(prefix) {
  135. return new OldSelector(this, prefix);
  136. };
  137. return Selector;
  138. }(Prefixer);
  139. module.exports = Selector;