openproject/frontend/app/ui_components/inaccessible-by-tab-directive.js

//-- copyright
// OpenProject is a project management system.
// Copyright (C) 2012-2017 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) 2006-2017 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.
//++

module.exports = function() {
  return {
    restrict: 'A',
    scope: {
      isInaccessible: "=inaccessibleByTab"
    },
    link: function(scope, element, attrs) {
      scope.oldTabIndex = element.attr("tabindex");
      scope.$watch('isInaccessible',
        function(isInaccessible) {
          if (isInaccessible) {
            var currentTabIndex = element.attr("tabindex");
            if (currentTabIndex != "-1") {
              scope.oldTabIndex = currentTabIndex;
            }
            element.attr("tabindex", -1);
            element.attr('aria-disabled', true);
          } else {
            element.attr('aria-disabled', false);
            if (scope.oldTabIndex) {
              element.attr("tabindex", scope.oldTabIndex);
            } else {
              element.removeAttr("tabindex");
            }
          }
        }
      );
    }
  };
};