| /******************************************************************************* |
| * Copyright (c) 2000, 2023 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.wst.jsdt.internal.ui.packageview; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.jface.util.LocalSelectionTransfer; |
| import org.eclipse.jface.util.TransferDropTargetListener; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.ITreeSelection; |
| import org.eclipse.jface.viewers.TreePath; |
| import org.eclipse.swt.dnd.DND; |
| import org.eclipse.swt.dnd.DropTargetEvent; |
| import org.eclipse.swt.dnd.Transfer; |
| import org.eclipse.ui.IWorkingSet; |
| import org.eclipse.wst.jsdt.core.IJavaScriptElement; |
| import org.eclipse.wst.jsdt.internal.corext.refactoring.reorg.ReorgUtils; |
| import org.eclipse.wst.jsdt.internal.ui.dnd.JdtViewerDropAdapter; |
| import org.eclipse.wst.jsdt.internal.ui.workingsets.OthersWorkingSetUpdater; |
| import org.eclipse.wst.jsdt.internal.ui.workingsets.WorkingSetModel; |
| |
| public class WorkingSetDropAdapter extends JdtViewerDropAdapter implements TransferDropTargetListener { |
| |
| private PackageExplorerPart fPackageExplorer; |
| |
| private IStructuredSelection fSelection; |
| private Object[] fElementsToAdds; |
| private Set fCurrentElements; |
| private IWorkingSet fWorkingSet; |
| |
| public WorkingSetDropAdapter(PackageExplorerPart part) { |
| super(part.getTreeViewer(), DND.FEEDBACK_SCROLL | DND.FEEDBACK_EXPAND); |
| fPackageExplorer= part; |
| } |
| |
| //---- TransferDropTargetListener interface --------------------------------------- |
| |
| public Transfer getTransfer() { |
| return LocalSelectionTransfer.getTransfer(); |
| } |
| |
| public boolean isEnabled(DropTargetEvent event) { |
| Object target= event.item != null ? event.item.getData() : null; |
| if (target == null) |
| return false; |
| ISelection selection= LocalSelectionTransfer.getTransfer().getSelection(); |
| if (!isValidSelection(selection)) { |
| return false; |
| } |
| if (!isValidTarget(target)) |
| return false; |
| |
| initializeState(target, selection); |
| return true; |
| } |
| |
| //---- Actual DND ----------------------------------------------------------------- |
| |
| public void validateDrop(Object target, DropTargetEvent event, int operation) { |
| event.detail= DND.DROP_NONE; |
| switch(operation) { |
| case DND.DROP_DEFAULT: |
| case DND.DROP_COPY: |
| case DND.DROP_MOVE: |
| event.detail= validateTarget(target, operation); |
| break; |
| case DND.DROP_LINK: |
| event.detail= DND.DROP_NONE; |
| break; |
| } |
| } |
| |
| private int validateTarget(Object target, int operation) { |
| showInsertionFeedback(false); |
| setDefaultFeedback(DND.FEEDBACK_SCROLL | DND.FEEDBACK_EXPAND); |
| if (!isValidTarget(target)) |
| return DND.DROP_NONE; |
| ISelection s= LocalSelectionTransfer.getTransfer().getSelection(); |
| if (!isValidSelection(s)) { |
| return DND.DROP_NONE; |
| } |
| |
| initializeState(target, s); |
| |
| if (isWorkingSetSelection()) { |
| setDefaultFeedback(DND.FEEDBACK_SCROLL); |
| if (fLocation == LOCATION_BEFORE || fLocation == LOCATION_AFTER) { |
| showInsertionFeedback(true); |
| return DND.DROP_MOVE; |
| } |
| return DND.DROP_NONE; |
| } else { |
| if (isOthersWorkingSet(fWorkingSet) && operation == DND.DROP_COPY) |
| return DND.DROP_NONE; |
| |
| List realJavaElements= new ArrayList(); |
| List realResource= new ArrayList(); |
| ReorgUtils.splitIntoJavaElementsAndResources(fElementsToAdds, realJavaElements, realResource); |
| if (fElementsToAdds.length != realJavaElements.size() + realResource.size()) |
| return DND.DROP_NONE; |
| for (Iterator iter= realJavaElements.iterator(); iter.hasNext();) { |
| IJavaScriptElement element= (IJavaScriptElement)iter.next(); |
| if (ReorgUtils.containsElementOrParent(fCurrentElements, element)) |
| return DND.DROP_NONE; |
| } |
| for (Iterator iter= realResource.iterator(); iter.hasNext();) { |
| IResource element= (IResource)iter.next(); |
| if (ReorgUtils.containsElementOrParent(fCurrentElements, element)) |
| return DND.DROP_NONE; |
| } |
| if (!(fSelection instanceof ITreeSelection)) { |
| return DND.DROP_COPY; |
| } |
| ITreeSelection treeSelection= (ITreeSelection)fSelection; |
| TreePath[] paths= treeSelection.getPaths(); |
| for (int i= 0; i < paths.length; i++) { |
| TreePath path= paths[i]; |
| if (path.getSegmentCount() != 2) |
| return DND.DROP_COPY; |
| if (!(path.getSegment(0) instanceof IWorkingSet)) |
| return DND.DROP_COPY; |
| if (paths.length == 1) { |
| IWorkingSet ws= (IWorkingSet)path.getSegment(0); |
| if (OthersWorkingSetUpdater.ID.equals(ws.getId())) |
| return DND.DROP_MOVE; |
| } |
| } |
| } |
| if (operation == DND.DROP_DEFAULT) |
| return DND.DROP_MOVE; |
| return operation; |
| } |
| |
| private boolean isValidTarget(Object target) { |
| return target instanceof IWorkingSet; |
| } |
| |
| private boolean isValidSelection(ISelection selection) { |
| return selection instanceof IStructuredSelection; |
| } |
| |
| private boolean isOthersWorkingSet(IWorkingSet ws) { |
| return OthersWorkingSetUpdater.ID.equals(ws.getId()); |
| } |
| |
| private void initializeState(Object target, ISelection s) { |
| fWorkingSet= (IWorkingSet)target; |
| fSelection= (IStructuredSelection)s; |
| fElementsToAdds= fSelection.toArray(); |
| fCurrentElements= new HashSet(Arrays.asList(fWorkingSet.getElements())); |
| } |
| |
| private boolean isWorkingSetSelection() { |
| for (int i= 0; i < fElementsToAdds.length; i++) { |
| if (!(fElementsToAdds[i] instanceof IWorkingSet)) |
| return false; |
| } |
| return true; |
| } |
| |
| public void drop(Object target, final DropTargetEvent event) { |
| if (isWorkingSetSelection()) { |
| performWorkingSetReordering(); |
| } else { |
| performElementRearrange(event.detail); |
| } |
| // drag adapter has nothing to do, even on move. |
| event.detail= DND.DROP_NONE; |
| } |
| |
| private void performWorkingSetReordering() { |
| WorkingSetModel model= fPackageExplorer.getWorkingSetModel(); |
| List activeWorkingSets= new ArrayList(Arrays.asList(model.getActiveWorkingSets())); |
| int index= activeWorkingSets.indexOf(fWorkingSet); |
| if (index != -1) { |
| if (fLocation == LOCATION_AFTER) |
| index++; |
| List result= new ArrayList(activeWorkingSets.size()); |
| List selected= new ArrayList(Arrays.asList(fElementsToAdds)); |
| for (int i= 0; i < activeWorkingSets.size(); i++) { |
| if (i == index) { |
| result.addAll(selected); |
| } |
| Object element= activeWorkingSets.get(i); |
| if (!selected.contains(element)) { |
| result.add(element); |
| } |
| } |
| if (index == activeWorkingSets.size()) |
| result.addAll(selected); |
| model.setActiveWorkingSets((IWorkingSet[])result.toArray(new IWorkingSet[result.size()])); |
| } |
| } |
| |
| private void performElementRearrange(int eventDetail) { |
| // only move if target isn't the other working set. If this is the case |
| // the move will happenn automatically by refreshing the other working set |
| if (!isOthersWorkingSet(fWorkingSet)) { |
| List elements= new ArrayList(Arrays.asList(fWorkingSet.getElements())); |
| elements.addAll(Arrays.asList(fElementsToAdds)); |
| fWorkingSet.setElements((IAdaptable[])elements.toArray(new IAdaptable[elements.size()])); |
| } |
| if (eventDetail == DND.DROP_MOVE) { |
| ITreeSelection treeSelection= (ITreeSelection)fSelection; |
| Map workingSets= groupByWorkingSets(treeSelection.getPaths()); |
| for (Iterator iter= workingSets.keySet().iterator(); iter.hasNext();) { |
| IWorkingSet ws= (IWorkingSet)iter.next(); |
| List toRemove= (List)workingSets.get(ws); |
| List currentElements= new ArrayList(Arrays.asList(ws.getElements())); |
| currentElements.removeAll(toRemove); |
| ws.setElements((IAdaptable[])currentElements.toArray(new IAdaptable[currentElements.size()])); |
| } |
| } |
| } |
| |
| private Map/*<List<IWorkingSet>>*/ groupByWorkingSets(TreePath[] paths) { |
| Map result= new HashMap(); |
| for (int i= 0; i < paths.length; i++) { |
| TreePath path= paths[i]; |
| IWorkingSet ws= (IWorkingSet)path.getSegment(0); |
| List l= (List)result.get(ws); |
| if (l == null) { |
| l= new ArrayList(); |
| result.put(ws, l); |
| } |
| l.add(path.getSegment(1)); |
| } |
| return result; |
| } |
| |
| //---- test methods for JUnit test since DnD is hard to simulate |
| |
| public int internalTestValidateTarget(Object target, int operation) { |
| return validateTarget(target, operation); |
| } |
| |
| public void internalTestDrop(Object target, int eventDetail) { |
| if (isWorkingSetSelection()) { |
| performWorkingSetReordering(); |
| } else { |
| performElementRearrange(eventDetail); |
| } |
| } |
| } |