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/*
* ModeShape (http://www.modeshape.org)
*
* 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 org.modeshape.web.client;
import com.google.gwt.event.logical.shared.HasValueChangeHandlers;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.GwtEvent;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.event.shared.SimpleEventBus;
import com.google.gwt.place.shared.PlaceHistoryHandler.Historian;
import com.google.gwt.user.client.History;
/**
*
* @author kulikov
*/
public class HtmlHistory implements Historian,
// allows the use of ValueChangeEvent.fire()
HasValueChangeHandlers {
private final SimpleEventBus handlers = new SimpleEventBus();
private String token;
public HtmlHistory() {
initEvent();
this.token = History.getToken();
}
@Override
public HandlerRegistration addValueChangeHandler(ValueChangeHandler valueChangeHandler) {
return this.handlers.addHandler(ValueChangeEvent.getType(), valueChangeHandler);
}
@Override
public String getToken() {
return token;
}
@Override
public void newItem(String token, boolean issueEvent) {
this.token = token;
pushState(token);
}
@Override
public void fireEvent(GwtEvent> event) {
this.handlers.fireEvent(event);
}
private native void initEvent() /*-{
var that = this;
var oldHandler = $wnd.onpopstate;
$wnd.onpopstate = $entry(function(e) {
var uri = $wnd.location
[email protected]::onPopState(Ljava/lang/String;)(uri);
if (oldHandler) {
oldHandler();
}
});
}-*/;
private void onPopState(String url) {
StringBuilder b = new StringBuilder();
b.append(url);
ValueChangeEvent.fire(this, b.toString());
}
private native void pushState(String url) /*-{
$wnd.history.pushState(null, $doc.title, url);
}-*/;
}
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