/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates.
*
* 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.uberfire.ext.editor.commons.client.menu;
import org.uberfire.backend.vfs.Path;
import org.uberfire.backend.vfs.impl.LockInfo;
import org.uberfire.workbench.model.menu.MenuItem;
/**
* Marker interface for Menu Builders that have lock-sync helpers.
*/
public interface HasLockSyncMenuStateHelper {
/**
* Sets a helper for {@link MenuItem}s synchronized with locks state (see {@link LockInfo}. {@link MenuItem}s
* considered to be synchronized with lock state are 'Save', 'Delete', 'Rename' and 'Restore'.
* @param lockSyncMenuStateHelper Cannot be null.
*/
void setLockSyncMenuStateHelper(final LockSyncMenuStateHelper lockSyncMenuStateHelper);
/**
* Helper to ascertain the enabled state of {@link MenuItem}s synchronized with lock state.
*/
interface LockSyncMenuStateHelper {
/**
* Returns whether {@link MenuItem}s should be enabled or disabled based on the provide lock information.
* @param file {@link Path} to which the lock relates.
* @param isLocked true if the file is locked.
* @param isLockedByCurrentUser true if the file is locked by the current User.
* @return
*/
Operation enable(final Path file,
final boolean isLocked,
final boolean isLockedByCurrentUser);
/**
* Possible operations; enable/disable MenuItem or veto any change all together.
*/
enum Operation {
ENABLE,
DISABLE,
VETO
}
}
/**
* Basic implementation that enables {@link MenuItem}s if the file is either not locked; or locked by the current User.
*/
class BasicLockSyncMenuStateHelper implements LockSyncMenuStateHelper {
@Override
public Operation enable(final Path file,
final boolean isLocked,
final boolean isLockedByCurrentUser) {
if (!isLocked) {
return Operation.ENABLE;
} else if (isLockedByCurrentUser) {
return Operation.ENABLE;
}
return Operation.DISABLE;
}
}
}