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// Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
//
// 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.gerrit.client.Gerrit;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwtexpui.globalkey.client.GlobalKey;
import com.google.gwtexpui.globalkey.client.KeyCommand;
import com.google.gwtexpui.globalkey.client.KeyCommandSet;
import java.util.HashMap;
import java.util.Map;
public abstract class AbstractKeyNavigation {
public enum Action { NEXT, PREV, OPEN };
protected final KeyCommandSet keysNavigation;
protected final KeyCommandSet keysAction;
private HandlerRegistration regNavigation;
private HandlerRegistration regAction;
private final KeyCommandSet keysOpenByEnter;
private HandlerRegistration regOpenByEnter;
protected final Widget parent;
private Map<Action, String> help;
protected static boolean initialized = false;
protected void onNext() {};
protected void onPrev() {};
protected void onOpen() {};
public AbstractKeyNavigation(final Widget parent) {
this.parent = parent;
help = new HashMap<AbstractKeyNavigation.Action, String>();
keysNavigation = new KeyCommandSet(Gerrit.C.sectionNavigation());
keysAction = new KeyCommandSet(Gerrit.C.sectionActions());
keysOpenByEnter = new KeyCommandSet(Gerrit.C.sectionNavigation());
}
public void setKeyHelp(final Action action, final String text) {
help.put(action, text);
}
public void initializeKeys() {
keysNavigation.add(new NextKeyCommand(0, 'j', help.get(Action.NEXT)));
keysNavigation.add(new PrevKeyCommand(0, 'k', help.get(Action.PREV)));
keysAction.add(new OpenKeyCommand(0, 'o', help.get(Action.OPEN)));
keysOpenByEnter.add(new OpenKeyCommand(0, KeyCodes.KEY_ENTER, help.get(Action.OPEN)));
}
public void addNavigationKey(final KeyCommand keyCommand) {
keysNavigation.add(keyCommand);
}
public void setRegisterKeys(final boolean on) {
if (on) {
if (regNavigation == null) {
regNavigation = GlobalKey.add(parent, keysNavigation);
}
if (regAction == null) {
regAction = GlobalKey.add(parent, keysAction);
}
if (regOpenByEnter == null) {
regOpenByEnter = GlobalKey.add(parent, keysOpenByEnter);
}
} else {
if (regNavigation != null) {
regNavigation.removeHandler();
regNavigation = null;
}
if (regAction != null) {
regAction.removeHandler();
regAction = null;
}
if (regOpenByEnter != null) {
regOpenByEnter.removeHandler();
regOpenByEnter = null;
}
}
}
public void setRegisterEnter(final boolean on) {
if (on) {
if (regOpenByEnter != null) {
regOpenByEnter.removeHandler();
regOpenByEnter = null;
}
} else {
if (keysOpenByEnter != null && regOpenByEnter == null) {
regOpenByEnter = GlobalKey.add(parent, keysOpenByEnter);
}
}
}
private class PrevKeyCommand extends KeyCommand {
public PrevKeyCommand(int mask, char key, String help) {
super(mask, key, help);
}
@Override
public void onKeyPress(final KeyPressEvent event) {
onPrev();
}
}
private class NextKeyCommand extends KeyCommand {
public NextKeyCommand(int mask, char key, String help) {
super(mask, key, help);
}
@Override
public void onKeyPress(final KeyPressEvent event) {
onNext();
}
}
private class OpenKeyCommand extends KeyCommand {
public OpenKeyCommand(int mask, int key, String help) {
super(mask, key, help);
}
@Override
public void onKeyPress(final KeyPressEvent event) {
onOpen();
}
}
protected class NoOpKeyCommand extends NeedsSignInKeyCommand {
public NoOpKeyCommand(int mask, int key, String help) {
super(mask, key, help);
}
@Override
public void onKeyPress(final KeyPressEvent event) {
}
}
}
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