stylelint/dist/rules/function-url-scheme-whitelist/index.js

A mighty, modern CSS linter.

"use strict";

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

exports.default = function (whitelist) {
  return function (root, result) {
    var validOptions = (0, _utils.validateOptions)(result, ruleName, {
      actual: whitelist,
      possible: [_lodash.isString]
    });
    if (!validOptions) {
      return;
    }

    root.walkDecls(function (decl) {
      (0, _utils.functionArgumentsSearch)(decl.toString().toLowerCase(), "url", function (args, index) {
        var urlString = (0, _lodash.trim)(args, " '\"");
        if (!(0, _utils.isStandardSyntaxUrl)(urlString)) {
          return;
        }

        var url = (0, _url.parse)(urlString);
        if (url.protocol === null) {
          return;
        }

        var scheme = url.protocol.toLowerCase().slice(0, -1); // strip trailing `:`

        // The URL spec does not require a scheme to be followed by `//`, but checking
        // for it allows this rule to differentiate <scheme>:<hostname> urls from
        // <hostname>:<port> urls. `data:` scheme urls are an exception to this rule.
        var slashIndex = url.protocol.length;
        var expectedSlashes = urlString.slice(slashIndex, slashIndex + 2);
        var isSchemeLessUrl = expectedSlashes !== "//" && scheme !== "data";
        if (isSchemeLessUrl) {
          return;
        }

        var whitelistLowerCase = typeof whitelist === "string" ? whitelist.toLowerCase() : whitelist.join("|").toLowerCase().split("|");

        if ((0, _utils.containsString)(scheme, whitelistLowerCase)) {
          return;
        }

        (0, _utils.report)({
          message: messages.rejected(scheme),
          node: decl,
          index: index,
          result: result,
          ruleName: ruleName
        });
      });
    });
  };
};

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

var _lodash = require("lodash");

var _url = require("url");

var ruleName = exports.ruleName = "function-url-scheme-whitelist";

var messages = exports.messages = (0, _utils.ruleMessages)(ruleName, {
  rejected: function rejected(scheme) {
    return "Unexpected url scheme \"" + scheme + ":\"";
  }
});