/* 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/. */


if (!window.__firefox__) {
  Object.defineProperty(window, '__firefox__', {
    enumerable: false,
    configurable: false,
    writable: false,
    value: {}
  });
}

Object.defineProperty(window.__firefox__, 'favicons', {
  enumerable: false,
  configurable: false,
  writable: false,
  value: (function() {
    // These integers should be kept in sync with the IconType raw-values
    var ICON = 0;
    var APPLE = 1;
    var APPLE_PRECOMPOSED = 2;
    var GUESS = 3;
  
    var selectors = {
      "link[rel~='icon']": ICON,
      "link[rel='apple-touch-icon']": APPLE,
      "link[rel='apple-touch-icon-precomposed']": APPLE_PRECOMPOSED
    };
  
    function getAll() {
      var favicons = {};
    
      for (var selector in selectors) {
        var icons = document.querySelectorAll(selector);
        for (var i = 0; i < icons.length; i++) {
          var href = icons[i].href;
          favicons[href] = selectors[selector];
        }
      }
    
      // If we didn't find anything in the page, look to see if a favicon.ico file exists for the domain
      if (Object.keys(favicons).length === 0) {
        var href = document.location.origin + "/favicon.ico";
        favicons[href] = GUESS;
      }
      return favicons;
    }
  
    function getFavicons() {
      var favicons = getAll();
      webkit.messageHandlers.faviconsMessageHandler.postMessage(favicons);
    }
  
    return {
      getFavicons: getFavicons
    };
  })()
});