added flexible path prefix

src/main/java/de/barop/gwt/client/HistoryImplPushState.java

@@ -16,6 +16,7 @@
 
 import java.util.logging.Logger;
 
+import com.google.gwt.core.client.GWT;
 import com.google.gwt.logging.client.LogConfiguration;
 import com.google.gwt.user.client.History;
 import com.google.gwt.user.client.Window;
@@ -40,8 +41,13 @@ public class HistoryImplPushState extends HistoryImpl {
 
   private static final Logger LOG = Logger.getLogger(HistoryImplPushState.class.getName());
 
+  private String currentPrefix;
+
   @Override
   public boolean init() {
+    // read default path prefix
+    final PathProviderInterface pathProvider = GWT.create(PathProviderInterface.class);
+    this.currentPrefix = pathProvider.getPathPrefix();
     // initialize HistoryImpl with the current path
     updateHistoryToken(Window.Location.getPath() + Window.Location.getQueryString());
     // initialize the empty state with the current history token
@@ -55,8 +61,8 @@ public boolean init() {
   @Override
   protected void nativeUpdate(final String historyToken) {
     String newPushStateToken = CodeServerParameterHelper.append(encodeFragment(historyToken));
-    if (!newPushStateToken.startsWith("/")) {
-      newPushStateToken = "/" + newPushStateToken;
+    if (!newPushStateToken.startsWith(currentPrefix)) {
+      newPushStateToken = currentPrefix + newPushStateToken;
     }
 
     pushState(newPushStateToken);
@@ -73,7 +79,9 @@ private void updateHistoryToken(String path) {
     String[] split = path.split("\\?");
     String token = split[0];
     token = (token.length() > 0) ? decodeFragment(token) : "";
-    token = (token.startsWith("/")) ? token.substring(1) : token;
+    if (token.startsWith(currentPrefix)) {
+      token = token.substring(currentPrefix.length());
+    }
 
     String queryString = (split.length == 2) ? split[1] : "";
     queryString = CodeServerParameterHelper.remove(queryString);

src/main/java/de/barop/gwt/client/PathProviderImpl.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2014 Manfred Tremmel
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You 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. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package de.barop.gwt.client;
+
+/**
+ * Path provider implementation which defines a path prefix.
+ *
+ * @author <a href="mailto:[email protected]">Manfred Tremmel</a>
+ *
+ */
+public class PathProviderImpl implements PathProviderInterface
+{
+  @Override
+  public final String getPathPrefix()
+  {
+    return "/";
+  }
+}

src/main/java/de/barop/gwt/client/PathProviderInterface.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2014 Manfred Tremmel
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You 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. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package de.barop.gwt.client;
+
+/**
+ * Interface which defines a path prefix provider.
+ *
+ * @author <a href="mailto:[email protected]">Manfred Tremmel</a>
+ *
+ */
+public interface PathProviderInterface
+{
+  /**
+   * get the path prefix.
+   */
+  String getPathPrefix();
+}

src/main/resources/de/barop/gwt/PushState.gwt.xml

@@ -100,6 +100,13 @@
     <when-type-is class="com.google.gwt.user.client.ui.InlineHyperlink" />
   </replace-with>
 
+  <!--
+    Path provider.
+  -->
+  <replace-with class="de.barop.gwt.client.PathProviderImpl">
+    <when-type-is class="de.barop.gwt.client.PathProviderInterface" />
+  </replace-with>
+
   <!--
     Ensures a suitable format of the history token for the current browser.
   -->