user/src/com/google/gwt/user/History.gwt.xml

<!--                                                                        -->
<!-- Copyright 2008 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                                    -->
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<!-- http://www.apache.org/licenses/LICENSE-2.0                             -->
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<!-- Unless required by applicable law or agreed to in writing, software    -->
<!-- distributed under the License is distributed on an "AS IS" BASIS,      -->
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<!-- limitations under the License.                                         -->

<!-- Deferred binding rules for browser selection.                          -->
<!--                                                                        -->
<!-- This module is typically inherited via com.google.gwt.user.User        -->
<!--                                                                        -->
<module>
	<inherits name="com.google.gwt.core.Core"/>
	<inherits name="com.google.gwt.user.UserAgent"/>

  <!-- Mozilla has a slightly different history implementation than the     -->
  <!-- standard case.                                                       -->
  <replace-with class="com.google.gwt.user.client.impl.HistoryImplMozilla">
    <when-type-is class="com.google.gwt.user.client.impl.HistoryImpl"/>
    <when-property-is name="user.agent" value="gecko1_8"/>
  </replace-with>

	<!-- Opera has yet another slightly different implementation. -->
	<replace-with class="com.google.gwt.user.client.impl.HistoryImplTimer">
		<when-type-is class="com.google.gwt.user.client.impl.HistoryImpl"/>
		<when-property-is name="user.agent" value="opera"/>
	</replace-with>

	<!-- Safari is almost like Opera, but again slightly different. -->
	<replace-with class="com.google.gwt.user.client.impl.HistoryImplSafari">
		<when-type-is class="com.google.gwt.user.client.impl.HistoryImpl"/>
		<when-property-is name="user.agent" value="safari"/>
	</replace-with>

  <!-- IE6 has a completely different history implementation. IE8 used the -->
  <!-- standard implementation. -->
	<replace-with class="com.google.gwt.user.client.impl.HistoryImplIE6">
		<when-type-is class="com.google.gwt.user.client.impl.HistoryImpl"/>
		<when-property-is name="user.agent" value="ie6"/>
	</replace-with>
</module>