text: /* This Source Code Form is subject to the terms of the Mozilla Public
   * License, v. 2.0. If a copy of the MPL was not distributed with this
   * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  
  "use strict";
  
  module.metadata = {
    "stability": "unstable"
  };
  
  const { URL } = require('../url');
  const cache = {};
  
  function MatchPattern(pattern) {
    if (cache[pattern]) return cache[pattern];
  
    if (typeof pattern.test == "function") {
  
      // For compatibility with -moz-document rules, we require the RegExp's
      // global, ignoreCase, and multiline flags to be set to false.
      if (pattern.global) {
        throw new Error("A RegExp match pattern cannot be set to `global` " +
                        "(i.e. //g).");
      }
      if (pattern.ignoreCase) {
        throw new Error("A RegExp match pattern cannot be set to `ignoreCase` " +
                        "(i.e. //i).");
      }
      if (pattern.multiline) {
        throw new Error("A RegExp match pattern cannot be set to `multiline` " +
                        "(i.e. //m).");
      }
  
      this.regexp = pattern;
    }
    else {
      let firstWildcardPosition = pattern.indexOf("*");
      let lastWildcardPosition = pattern.lastIndexOf("*");
      if (firstWildcardPosition != lastWildcardPosition)
        throw new Error("There can be at most one '*' character in a wildcard.");
  
      if (firstWildcardPosition == 0) {
        if (pattern.length == 1)
          this.anyWebPage = true;
        else if (pattern[1] != ".")
          throw new Error("Expected a *.<domain name> string, got: " + pattern);
        else
          this.domain = pattern.substr(2);
      }
      else {
        if (pattern.indexOf(":") == -1) {
          throw new Error("When not using *.example.org wildcard, the string " +
                          "supplied is expected to be either an exact URL to " +
                          "match or a URL prefix. The provided string ('" +
                          pattern + "') is unlikely to match any pages.");
        }
  
        if (firstWildcardPosition == -1)
          this.exactURL = pattern;
        else if (firstWildcardPosition == pattern.length - 1)
          this.urlPrefix = pattern.substr(0, pattern.length - 1);
        else {
          throw new Error("The provided wildcard ('" + pattern + "') has a '*' " +
                          "in an unexpected position. It is expected to be the " +
                          "first or the last character in the wildcard.");
        }
      }
    }
  
    cache[pattern] = this;
  }
  
  MatchPattern.prototype = {
  
    test: function MatchPattern_test(urlStr) {
      try {
        var url = URL(urlStr);
      }
      catch (err) {
        return false;
      }
  
      // Test the URL against a RegExp pattern.  For compatibility with
      // -moz-document rules, we require the RegExp to match the entire URL,
      // so we not only test for a match, we also make sure the matched string
      // is the entire URL string.
      //
      // Assuming most URLs don't match most match patterns, we call `test` for
      // speed when determining whether or not the URL matches, then call `exec`
      // for the small subset that match to make sure the entire URL matches.
      //
      if (this.regexp && this.regexp.test(urlStr) &&
          this.regexp.exec(urlStr)[0] == urlStr)
        return true;
  
      if (this.anyWebPage && /^(https?|ftp)$/.test(url.scheme))
        return true;
      if (this.exactURL && this.exactURL == urlStr)
        return true;
  
      // Tests the urlStr against domain and check if
      // wildcard submitted (*.domain.com), it only allows
      // subdomains (sub.domain.com) or from the root (http://domain.com)
      // and reject non-matching domains (otherdomain.com)
      // bug 856913
      if (this.domain && url.host &&
           (url.host === this.domain ||
            url.host.slice(-this.domain.length - 1) === "." + this.domain))
        return true;
      if (this.urlPrefix && 0 == urlStr.indexOf(this.urlPrefix))
        return true;
  
      return false;
    },
  
    toString: function () '[object MatchPattern]'
  
  };
  
  exports.MatchPattern = MatchPattern;
  