stylelint/dist/rules/at-rule-empty-line-before/index.js

A mighty, modern CSS linter.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.messages = exports.ruleName = undefined;

exports.default = function (expectation, options) {
  return function (root, result) {
    var validOptions = (0, _utils.validateOptions)(result, ruleName, {
      actual: expectation,
      possible: ["always", "never"]
    }, {
      actual: options,
      possible: {
        except: ["all-nested", "blockless-after-same-name-blockless", "blockless-group", "first-nested"],
        ignore: ["after-comment", "all-nested", "blockless-after-same-name-blockless", "blockless-group"],
        ignoreAtRules: [_lodash.isString]
      },
      optional: true
    });
    if (!validOptions) {
      return;
    }

    root.walkAtRules(function (atRule) {
      // Ignore the first node
      if (atRule === root.first) {
        return;
      }

      // Return early if at-rule is to be ignored
      if ((0, _utils.optionsMatches)(options, "ignoreAtRules", atRule.name)) {
        return;
      }

      // Optionally ignore the expectation if the node is blockless
      if ((0, _utils.optionsMatches)(options, "ignore", "blockless-group") && !(0, _utils.hasBlock)(atRule)) {
        return;
      }

      var isNested = atRule.parent !== root;
      var previousNode = atRule.prev();

      // Optionally ignore the expection if the node is blockless
      // and following another blockless at-rule with the same name
      if ((0, _utils.optionsMatches)(options, "ignore", "blockless-after-same-name-blockless") && isBlocklessAfterSameNameBlockless()) {
        return;
      }

      // Optionally ignore the expectation if the node is nested
      if ((0, _utils.optionsMatches)(options, "ignore", "all-nested") && isNested) {
        return;
      }

      // Optionally ignore the expectation if a comment precedes this node
      if ((0, _utils.optionsMatches)(options, "ignore", "after-comment") && isAfterComment()) {
        return;
      }

      var hasEmptyLineBefore = (0, _utils.hasEmptyLine)(atRule.raw("before"));
      var expectEmptyLineBefore = expectation === "always" ? true : false;

      // Optionally reverse the expectation if any exceptions apply
      if ((0, _utils.optionsMatches)(options, "except", "all-nested") && isNested || (0, _utils.optionsMatches)(options, "except", "first-nested") && isFirstNested() || (0, _utils.optionsMatches)(options, "except", "blockless-group") && isBlocklessAfterBlockless() || (0, _utils.optionsMatches)(options, "except", "blockless-after-same-name-blockless") && isBlocklessAfterSameNameBlockless()) {
        expectEmptyLineBefore = !expectEmptyLineBefore;
      }

      // Return if the expectation is met
      if (expectEmptyLineBefore === hasEmptyLineBefore) {
        return;
      }

      var message = expectEmptyLineBefore ? messages.expected : messages.rejected;

      (0, _utils.report)({
        message: message,
        node: atRule,
        result: result,
        ruleName: ruleName
      });

      function isAfterComment() {
        return previousNode && previousNode.type === "comment";
      }

      function isBlocklessAfterBlockless() {
        return previousNode && previousNode.type === "atrule" && !(0, _utils.hasBlock)(previousNode) && !(0, _utils.hasBlock)(atRule);
      }

      function isBlocklessAfterSameNameBlockless() {
        return !(0, _utils.hasBlock)(atRule) && previousNode && !(0, _utils.hasBlock)(previousNode) && previousNode.type === "atrule" && previousNode.name == atRule.name;
      }

      function isFirstNested() {
        return isNested && atRule === atRule.parent.first;
      }
    });
  };
};

var _utils = require("../../utils");

var _lodash = require("lodash");

var ruleName = exports.ruleName = "at-rule-empty-line-before";

var messages = exports.messages = (0, _utils.ruleMessages)(ruleName, {
  expected: "Expected empty line before at-rule",
  rejected: "Unexpected empty line before at-rule"
});