user/src/com/google/gwt/core/CoreWithUserAgent.gwt.xml

<!--                                                                        -->
<!-- Copyright 2009 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.                                         -->

<!-- Deferred binding rules for core classes based on user agent. -->
<module type="fileset">
  <inherits name="com.google.gwt.core.Core"/>

  <!-- Replace JS map factory to support older browsers -->
  <replace-with class="java.util.InternalJsMapFactory.BackwardCompatibleJsMapFactory">
    <when-type-is class="java.util.InternalJsMapFactory"/>
  </replace-with>

  <!-- Disable source maps for non-Chrome browsers -->
  <!-- TODO(goktug): enable source maps for non-Chrome browsers -->
  <set-property name="compiler.useSourceMaps" value="false">
    <none> 
      <when-property-is name="user.agent" value="safari"/>
    </none> 
  </set-property>

  <replace-with class="com.google.gwt.core.client.impl.StackTraceCreator.CollectorModernNoSourceMap">
    <when-type-is class="com.google.gwt.core.client.impl.StackTraceCreator.Collector" />
    <when-property-is name="compiler.stackMode" value="native" />
    <any>
      <when-property-is name="user.agent" value="gecko1_8" />
      <when-property-is name="user.agent" value="ie10"/>
      <when-property-is name="user.agent" value="safari" />
    </any>
  </replace-with>

  <replace-with class="com.google.gwt.core.client.impl.StackTraceCreator.CollectorModern">
    <when-type-is class="com.google.gwt.core.client.impl.StackTraceCreator.Collector" />
    <when-property-is name="compiler.stackMode" value="native" />
    <when-property-is name="user.agent" value="safari" />
    <when-property-is name="compiler.useSourceMaps" value="true"/>
  </replace-with>

  <!-- Utility class to query if source maps are enabled, mainly for testing -->
  <replace-with class="com.google.gwt.core.client.impl.SourceMapProperty.SourceMapEnabled">
    <when-type-is class="com.google.gwt.core.client.impl.SourceMapProperty.SourceMapImpl"/>
    <when-property-is name="compiler.useSourceMaps" value="true"/>
  </replace-with>

  <!-- If stack trace emulation is on, we can still get accurate stack traces even if sourcemaps are off -->
  <replace-with class="com.google.gwt.core.client.impl.SourceMapProperty.SourceMapEnabled">
    <when-type-is class="com.google.gwt.core.client.impl.SourceMapProperty.SourceMapImpl"/>
    <when-property-is name="compiler.useSourceMaps" value="false"/>
    <when-property-is name="compiler.stackMode" value="emulated"/>
  </replace-with>
</module>