| // Copyright (C) 2013 The Android Open Source Project |
| // |
| // 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.google.gerrit.client.ui; |
| |
| import com.google.gwt.core.client.Scheduler; |
| import com.google.gwt.core.client.Scheduler.RepeatingCommand; |
| import com.google.gwt.event.dom.client.KeyPressEvent; |
| import com.google.gwt.event.dom.client.KeyPressHandler; |
| import com.google.gwt.event.dom.client.MouseMoveEvent; |
| import com.google.gwt.event.dom.client.MouseMoveHandler; |
| 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.EventBus; |
| 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.user.client.History; |
| import com.google.gwtexpui.globalkey.client.DocWidget; |
| |
| /** Checks for user keyboard and mouse activity. */ |
| public class UserActivityMonitor { |
| private static final long TIMEOUT = 10 * 60 * 1000; |
| private static final MonitorImpl impl; |
| |
| /** |
| * @return true if there has been keyboard and/or mouse activity in recent enough history to |
| * believe a user is still controlling this session. |
| */ |
| public static boolean isActive() { |
| return impl.active || impl.recent; |
| } |
| |
| public static HandlerRegistration addValueChangeHandler(ValueChangeHandler<Boolean> handler) { |
| return impl.addValueChangeHandler(handler); |
| } |
| |
| static { |
| impl = new MonitorImpl(); |
| DocWidget.get().addKeyPressHandler(impl); |
| DocWidget.get().addMouseMoveHandler(impl); |
| History.addValueChangeHandler(impl); |
| Scheduler.get().scheduleFixedDelay(impl, 60 * 1000); |
| } |
| |
| private UserActivityMonitor() {} |
| |
| private static class MonitorImpl |
| implements RepeatingCommand, |
| KeyPressHandler, |
| MouseMoveHandler, |
| ValueChangeHandler<String>, |
| HasValueChangeHandlers<Boolean> { |
| private final EventBus bus = new SimpleEventBus(); |
| private boolean recent = true; |
| private boolean active = true; |
| private long last = System.currentTimeMillis(); |
| |
| @Override |
| public void onKeyPress(KeyPressEvent event) { |
| recent = true; |
| } |
| |
| @Override |
| public void onMouseMove(MouseMoveEvent event) { |
| recent = true; |
| } |
| |
| @Override |
| public void onValueChange(ValueChangeEvent<String> event) { |
| recent = true; |
| } |
| |
| @Override |
| public boolean execute() { |
| long now = System.currentTimeMillis(); |
| if (recent) { |
| if (!active) { |
| ValueChangeEvent.fire(this, active); |
| } |
| recent = false; |
| active = true; |
| last = now; |
| } else if (active && (now - last) > TIMEOUT) { |
| active = false; |
| ValueChangeEvent.fire(this, false); |
| } |
| return true; |
| } |
| |
| @Override |
| public HandlerRegistration addValueChangeHandler(ValueChangeHandler<Boolean> handler) { |
| return bus.addHandler(ValueChangeEvent.getType(), handler); |
| } |
| |
| @Override |
| public void fireEvent(GwtEvent<?> event) { |
| bus.fireEvent(event); |
| } |
| } |
| } |