/*
* Copyright 2011 Daniel Kurka
*
* 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 com.googlecode.mgwt.mvp.client.history;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.http.client.UrlBuilder;
import com.google.gwt.place.shared.PlaceHistoryHandler.Historian;
import com.google.gwt.user.client.History;
import com.google.gwt.user.client.Window;
import com.google.web.bindery.event.shared.EventBus;
import com.google.web.bindery.event.shared.HandlerRegistration;
import com.google.web.bindery.event.shared.SimpleEventBus;
public class HTML5HistorianLegacyImpl implements Html5Historian, ValueChangeHandler<String> {
public static class DefaultHistorian implements Historian {
public com.google.gwt.event.shared.HandlerRegistration addValueChangeHandler(ValueChangeHandler<String> valueChangeHandler) {
return History.addValueChangeHandler(valueChangeHandler);
}
public String getToken() {
return History.getToken();
}
public void newItem(String token, boolean issueEvent) {
History.newItem(token, issueEvent);
}
}
private DefaultHistorian defaultHistorian;
private EventBus eventBus = new SimpleEventBus();
public HTML5HistorianLegacyImpl() {
defaultHistorian = new DefaultHistorian();
defaultHistorian.addValueChangeHandler(this);
}
@Override
public void forward() {
History.forward();
}
@Override
public void back() {
History.back();
}
@Override
public void go(int number) {
if (number > 0) {
History.forward();
} else {
History.back();
}
}
@Override
public int length() {
return -1;
}
@Override
public void pushState(String data, String title, String url) {
History.newItem(data, false);
}
@Override
public void replaceState(String data, String title, String url) {
UrlBuilder builder = Window.Location.createUrlBuilder();
builder.setHash(data);
Window.Location.replace(builder.buildString());
}
@Override
public HandlerRegistration addPopStateHandler(PopStateHandler handler) {
return eventBus.addHandler(PopStateEvent.getType(), handler);
}
@Override
public void onValueChange(ValueChangeEvent<String> event) {
eventBus.fireEvent(new PopStateEvent(event.getValue(), Window.getTitle(), Window.Location.getHref()));
}
}