text: /*******************************************************************************
  
      uMatrix - a browser extension to block requests.
      Copyright (C) 2014-2018 The uMatrix/uBlock Origin authors
  
      This program is free software: you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published by
      the Free Software Foundation, either version 3 of the License, or
      (at your option) any later version.
  
      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.
  
      You should have received a copy of the GNU General Public License
      along with this program.  If not, see {http://www.gnu.org/licenses/}.
  
      Home: https://github.com/gorhill/uMatrix
  */
  
  // For background page or non-background pages
  
  'use strict';
  
  /******************************************************************************/
  /******************************************************************************/
  
  (function(self) {
  
  /******************************************************************************/
  
  // https://bugs.chromium.org/p/project-zero/issues/detail?id=1225&desc=6#c10
  if ( self.vAPI === undefined || self.vAPI.uMatrix !== true ) {
      self.vAPI = { uMatrix: true };
  }
  
  var vAPI = self.vAPI;
  var chrome = self.chrome;
  
  /******************************************************************************/
  
  vAPI.setTimeout = vAPI.setTimeout || window.setTimeout.bind(window);
  
  /******************************************************************************/
  
  vAPI.webextFlavor = {
      major: 0,
      soup: new Set()
  };
  
  (function() {
      var ua = navigator.userAgent,
          flavor = vAPI.webextFlavor,
          soup = flavor.soup;
      var dispatch = function() {
          window.dispatchEvent(new CustomEvent('webextFlavor'));
      };
  
      // This is always true.
      soup.add('ublock');
  
      if ( /\bMobile\b/.test(ua) ) {
          soup.add('mobile');
      }
  
      // Asynchronous
      var async = self.browser instanceof Object &&
                  typeof self.browser.runtime.getBrowserInfo === 'function';
      if ( async ) {
          self.browser.runtime.getBrowserInfo().then(function(info) {
              flavor.major = parseInt(info.version, 10) || 0;
              soup.add(info.vendor.toLowerCase())
                  .add(info.name.toLowerCase());
              if ( flavor.major >= 53 ) { soup.add('user_stylesheet'); }
              if ( flavor.major >= 57 ) { soup.add('html_filtering'); }
              dispatch();
          });
      }
  
      // Synchronous
      var match = /Firefox\/([\d.]+)/.exec(ua);
      if ( match !== null ) {
          flavor.major = parseInt(match[1], 10) || 0;
          soup.add('mozilla')
              .add('firefox');
          if ( flavor.major >= 53 ) { soup.add('user_stylesheet'); }
          if ( flavor.major >= 57 ) { soup.add('html_filtering'); }
      } else {
          match = /OPR\/([\d.]+)/.exec(ua);
          if ( match !== null ) {
              var reEx = /Chrom(?:e|ium)\/([\d.]+)/;
              if ( reEx.test(ua) ) { match = reEx.exec(ua); }
              flavor.major = parseInt(match[1], 10) || 0;
              soup.add('opera').add('chromium');
          } else {
              match = /Chromium\/([\d.]+)/.exec(ua);
              if ( match !== null ) {
                  flavor.major = parseInt(match[1], 10) || 0;
                  soup.add('chromium');
              } else {
                  match = /Chrome\/([\d.]+)/.exec(ua);
                  if ( match !== null ) {
                      flavor.major = parseInt(match[1], 10) || 0;
                      soup.add('google').add('chromium');
                  }
              }
          }
          // https://github.com/gorhill/uBlock/issues/3588
          if ( soup.has('chromium') && flavor.major >= 67 ) {
              soup.add('user_stylesheet');
          }
      }
  
      // Don't starve potential listeners
      if ( !async ) {
          vAPI.setTimeout(dispatch, 97);
      }
  })();
  
  /******************************************************************************/
  
  // http://www.w3.org/International/questions/qa-scripts#directions
  
  var setScriptDirection = function(language) {
      document.body.setAttribute(
          'dir',
          ['ar', 'he', 'fa', 'ps', 'ur'].indexOf(language) !== -1 ? 'rtl' : 'ltr'
      );
  };
  
  /******************************************************************************/
  
  vAPI.download = function(details) {
      if ( !details.url ) {
          return;
      }
  
      var a = document.createElement('a');
      a.href = details.url;
      a.setAttribute('download', details.filename || '');
      a.dispatchEvent(new MouseEvent('click'));
  };
  
  /******************************************************************************/
  
  vAPI.getURL = chrome.runtime.getURL;
  
  /******************************************************************************/
  
  vAPI.i18n = chrome.i18n.getMessage;
  
  setScriptDirection(vAPI.i18n('@@ui_locale'));
  
  /******************************************************************************/
  
  vAPI.closePopup = function() {
      window.close();
  };
  
  /******************************************************************************/
  
  // A localStorage-like object which should be accessible from the
  // background page or auxiliary pages.
  // This storage is optional, but it is nice to have, for a more polished user
  // experience.
  
  // https://github.com/gorhill/uBlock/issues/2824
  //   Use a dummy localStorage if for some reasons it's not available.
  
  // https://github.com/gorhill/uMatrix/issues/840
  //   Always use a wrapper to seamlessly handle exceptions
  
  vAPI.localStorage = {
      clear: function() {
          try {
              window.localStorage.clear();
          } catch(ex) {
          }
      },
      getItem: function(key) {
          try {
              return window.localStorage.getItem(key);
          } catch(ex) {
          }
          return null;
      },
      removeItem: function(key) {
          try {
              window.localStorage.removeItem(key);
          } catch(ex) {
          }
      },
      setItem: function(key, value) {
          try {
              window.localStorage.setItem(key, value);
          } catch(ex) {
          }
      }
  };
  
  /******************************************************************************/
  
  })(this);
  
  /******************************************************************************/
  