<!--                                                                        -->
<!-- Copyright 2007 Google Inc.                                             -->
<!-- Licensed under the Apache License, Version 2.0 (the "License"); you    -->
<!-- may not use this file except in compliance with the License. You may   -->
<!-- may obtain a copy of the License at                                    -->
<!--                                                                        -->
<!-- http://www.apache.org/licenses/LICENSE-2.0                             -->
<!--                                                                        -->
<!-- Unless required by applicable law or agreed to in writing, software    -->
<!-- distributed under the License is distributed on an "AS IS" BASIS,      -->
<!-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        -->
<!-- implied. License for the specific language governing permissions and   -->
<!-- limitations under the License.                                         -->

<!-- Defines the user.agent property and its provider function.             -->
<!--                                                                        -->
<!-- This module is typically inherited via com.google.gwt.user.User        -->
<!--                                                                        -->
<module>

  <!-- Browser-sensitive code should use the 'user.agent' property -->
  <define-property name="user.agent" values="ie6,gecko,gecko1_8,safari,opera"/>

  <property-provider name="user.agent"><![CDATA[
      var ua = navigator.userAgent.toLowerCase();
      var makeVersion = function(result) {
          return (parseInt(result[1]) * 1000) + parseInt(result[2]);
      };

      if (ua.indexOf("opera") != -1) {
        return "opera";
      } else if (ua.indexOf("webkit") != -1) {
        return "safari";
      } else if (ua.indexOf("msie") != -1) {
        var result = /msie ([0-9]+)\.([0-9]+)/.exec(ua);
        if (result && result.length == 3) {
          if (makeVersion(result) >= 6000) {
            return "ie6";
          }
        }
      } else if (ua.indexOf("gecko") != -1) {
        var result = /rv:([0-9]+)\.([0-9]+)/.exec(ua);
        if (result && result.length == 3) {
          if (makeVersion(result) >= 1008)
            return "gecko1_8";
          }
        return "gecko";
      }
      return "unknown";
  ]]></property-provider>

  <!-- Deferred binding to optimize JRE classes based on user agent. -->
  <inherits name="com.google.gwt.emul.EmulationWithUserAgent"/>
</module>