openproject/frontend/app/components/common/focus-within/focus-within.directive.ts

//-- copyright
// OpenProject is a project management system.
// Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License version 3.
//
// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
// Copyright (C) 2006-2013 Jean-Philippe Lang
// Copyright (C) 2010-2013 the ChiliProject Team
//
// 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 2
// 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, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// See doc/COPYRIGHT.rdoc for more details.
//++

import {wpDirectivesModule} from "../../../angular-modules";

// with courtesy of http://stackoverflow.com/a/29722694/3206935

function focusWithinDirective() {
  return {
    restrict: 'A',

    link: (scope:ng.IScope, element:ng.IAugmentedJQuery) => {
      var focusListener = function () {
          scope.focusWithin = true;
          scope.$digest();
      };

      var blurListener = function () {
          scope.focusWithin = false;
          scope.$digest();
      };


      element[0].addEventListener('focus', focusListener, true);
      element[0].addEventListener('blur', blurListener, true);
    }
  };
}

wpDirectivesModule.directive('focusWithin', focusWithinDirective);