1 /** 2 * This file Copyright (c) 2013-2018 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.ui.workbench.tree.drop; 35 36 import info.magnolia.ui.workbench.tree.MoveLocation; 37 38 import com.vaadin.v7.data.Item; 39 40 /** 41 * Basic implementation of {@link DropConstraint}. Return Always true. 42 */ 43 public class AlwaysTrueDropConstraint implements DropConstraint { 44 45 @Override 46 public boolean allowedAsChild(Item sourceItem, Item targetItem) { 47 return true; 48 } 49 50 @Override 51 public boolean allowedBefore(Item sourceItem, Item targetItem) { 52 return true; 53 } 54 55 @Override 56 public boolean allowedAfter(Item sourceItem, Item targetItem) { 57 return true; 58 } 59 60 @Override 61 public boolean allowedToMove(Item sourceItem) { 62 return true; 63 } 64 65 @Override 66 public boolean isAllowedAt(Item sourceItem, Item targetItem, MoveLocation location) { 67 switch (location) { 68 case INSIDE: 69 return allowedAsChild(sourceItem, targetItem); 70 case AFTER: 71 return allowedAfter(sourceItem, targetItem); 72 case BEFORE: 73 return allowedBefore(sourceItem, targetItem); 74 } 75 return false; 76 } 77 }