@atlaskit/eslint-plugin-ui-styling-standard/dist/cjs/rules/utils/parse-selector.js

The eslint plugin to enforce and educate on Atlassian's UI Styling Standard

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.parseSelector = parseSelector;
var _postcssSelectorParser = _interopRequireDefault(require("postcss-selector-parser"));
var _contextCompat = require("@atlaskit/eslint-utils/context-compat");
var cssSelectorProcessor = (0, _postcssSelectorParser.default)();
var selectorCache = new WeakMap();

/**
 * Parse each selector once per linted source file. Consumers treat the returned AST as read-only.
 */
function parseSelector(context, selectorText) {
  var sourceCode = (0, _contextCompat.getSourceCode)(context);
  var sourceFileCache = selectorCache.get(sourceCode);
  if (!sourceFileCache) {
    sourceFileCache = new Map();
    selectorCache.set(sourceCode, sourceFileCache);
  }
  var cachedSelector = sourceFileCache.get(selectorText);
  if (cachedSelector) {
    return cachedSelector;
  }
  var selector = cssSelectorProcessor.astSync(selectorText);
  sourceFileCache.set(selectorText, selector);
  return selector;
}