stuff

node_modules/@marp-team/marpit/lib/postcss/nesting.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.nesting = exports.default = void 0;
+var _postcssIsPseudoClass = _interopRequireDefault(require("@csstools/postcss-is-pseudo-class"));
+var _postcssNesting = _interopRequireDefault(require("postcss-nesting"));
+var _postcss_plugin = _interopRequireDefault(require("../helpers/postcss_plugin"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/** @module */
+
+const {
+  Rule: applyPostCSSNesting
+} = (0, _postcssNesting.default)();
+const matcher = /:is\((?:section|:root)\b/;
+const nesting = exports.nesting = (0, _postcss_plugin.default)('marpit-postcss-nesting', () => (root, helpers) => {
+  const rules = [];
+
+  // Note: Use walk instead of walkRules to include nested rules
+  root.walk(node => {
+    if (node.type !== 'rule') return;
+    rules.push(node);
+    node.__marpitNestingOriginalSelector = node.selector;
+  });
+
+  // Apply postcss-nesting
+  root.walkRules(rule => applyPostCSSNesting(rule, helpers));
+  const {
+    Rule: applyPostCSSIsPseudoClass
+  } = (0, _postcssIsPseudoClass.default)({
+    onComplexSelector: 'warning'
+  }).prepare();
+  for (const rule of rules) {
+    if (rule.__marpitNestingOriginalSelector !== rule.selector && matcher.test(rule.selector)) {
+      // Apply postcss-is-pseudo-class only to transformed rules that is
+      // including `:is() selector starting from `section` element or `:root`
+      // pseudo-class
+      applyPostCSSIsPseudoClass(rule, helpers);
+    }
+    delete rule.__marpitNestingOriginalSelector;
+  }
+});
+var _default = exports.default = nesting;