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Move/copy/adapt deprecated NavigatorDragAdapter
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org.eclipse.search/search/org/eclipse/search/internal/ui/text/NavigatorDragAdapter.java
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| /******************************************************************************* | ||
| * Copyright (c) 2000, 2017 IBM Corporation and others. | ||
| * | ||
| * This program and the accompanying materials | ||
| * are made available under the terms of the Eclipse Public License 2.0 | ||
| * which accompanies this distribution, and is available at | ||
| * https://www.eclipse.org/legal/epl-2.0/ | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| * | ||
| * Contributors: | ||
| * IBM Corporation - initial API and implementation | ||
| *******************************************************************************/ | ||
| package org.eclipse.search.internal.ui.text; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
||
| import org.eclipse.core.resources.IFile; | ||
| import org.eclipse.core.resources.IFolder; | ||
| import org.eclipse.core.resources.IResource; | ||
| import org.eclipse.core.runtime.CoreException; | ||
| import org.eclipse.core.runtime.IPath; | ||
| import org.eclipse.jface.util.LocalSelectionTransfer; | ||
| import org.eclipse.jface.viewers.ISelection; | ||
| import org.eclipse.jface.viewers.ISelectionProvider; | ||
| import org.eclipse.jface.viewers.IStructuredSelection; | ||
| import org.eclipse.search.internal.ui.SearchMessages; | ||
| import org.eclipse.search.internal.ui.SearchPlugin; | ||
| import org.eclipse.swt.dnd.DND; | ||
| import org.eclipse.swt.dnd.DragSource; | ||
| import org.eclipse.swt.dnd.DragSourceAdapter; | ||
| import org.eclipse.swt.dnd.DragSourceEvent; | ||
| import org.eclipse.swt.dnd.DragSourceListener; | ||
| import org.eclipse.swt.dnd.FileTransfer; | ||
| import org.eclipse.swt.dnd.TransferData; | ||
| import org.eclipse.swt.widgets.Control; | ||
| import org.eclipse.swt.widgets.Shell; | ||
| import org.eclipse.ui.actions.ReadOnlyStateChecker; | ||
| import org.eclipse.ui.part.ResourceTransfer; | ||
| import org.eclipse.ui.statushandlers.StatusManager; | ||
|
|
||
| /** | ||
| * Implements drag behaviour when items are dragged out of the resource | ||
| * navigator. Copied from deprecated org.eclipse.ui.views.navigator.NavigatorDragAdapter | ||
| */ | ||
| public class NavigatorDragAdapter extends DragSourceAdapter { | ||
| private static final String CHECK_MOVE_TITLE = SearchMessages.DragAdapter_title; | ||
|
|
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| private static final String CHECK_DELETE_MESSAGE = SearchMessages.DragAdapter_checkDeleteMessage; | ||
|
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| ISelectionProvider selectionProvider; | ||
|
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| private TransferData lastDataType; | ||
|
|
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| /** | ||
| * Constructs a new drag adapter. | ||
| * | ||
| * @param provider The selection provider | ||
| */ | ||
| public NavigatorDragAdapter(ISelectionProvider provider) { | ||
| selectionProvider = provider; | ||
| } | ||
|
|
||
| /** | ||
| * This implementation of | ||
| * {@link DragSourceListener#dragFinished(DragSourceEvent)} responds to a drag | ||
| * that has moved resources outside the Navigator by deleting the corresponding | ||
| * source resource. | ||
| */ | ||
| @Override | ||
| public void dragFinished(DragSourceEvent event) { | ||
| LocalSelectionTransfer.getTransfer().setSelection(null); | ||
|
|
||
| if (event.doit == false) { | ||
| return; | ||
| } | ||
|
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| final int typeMask = IResource.FOLDER | IResource.FILE; | ||
| if (event.detail == DND.DROP_MOVE) { | ||
| // never delete resources when dragging outside Eclipse. | ||
| // workaround for bug 30543. | ||
| if (lastDataType != null && FileTransfer.getInstance().isSupportedType(lastDataType)) { | ||
| return; | ||
| } | ||
|
|
||
| IResource[] resources = getSelectedResources(typeMask); | ||
| DragSource dragSource = (DragSource) event.widget; | ||
| Control control = dragSource.getControl(); | ||
| Shell shell = control.getShell(); | ||
| ReadOnlyStateChecker checker; | ||
|
|
||
| if (resources == null || resources.length == 0) { | ||
| return; | ||
| } | ||
|
|
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| checker = new ReadOnlyStateChecker(shell, CHECK_MOVE_TITLE, CHECK_DELETE_MESSAGE); | ||
| resources = checker.checkReadOnlyResources(resources); | ||
| // delete the old elements | ||
| for (IResource resource : resources) { | ||
| try { | ||
| resource.delete(IResource.KEEP_HISTORY | IResource.FORCE, null); | ||
| } catch (CoreException e) { | ||
| StatusManager.getManager().handle(e, SearchPlugin.getID()); | ||
| } | ||
| } | ||
| } else if (event.detail == DND.DROP_TARGET_MOVE) { | ||
| IResource[] resources = getSelectedResources(typeMask); | ||
|
|
||
| // file moved for us by OS, no need to delete the resources, just | ||
| // update the view | ||
| if (resources == null) { | ||
| return; | ||
| } | ||
| for (IResource resource : resources) { | ||
| try { | ||
| resource.refreshLocal(IResource.DEPTH_INFINITE, null); | ||
| } catch (CoreException e) { | ||
| StatusManager.getManager().handle(e, SearchPlugin.getID()); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * This implementation of | ||
| * {@link DragSourceListener#dragSetData(DragSourceEvent)} sets the drag event | ||
| * data based on the current selection in the Navigator. | ||
| */ | ||
| @Override | ||
| public void dragSetData(DragSourceEvent event) { | ||
| final int typeMask = IResource.FILE | IResource.FOLDER; | ||
| IResource[] resources = getSelectedResources(typeMask); | ||
|
|
||
| if (resources == null || resources.length == 0) { | ||
| return; | ||
| } | ||
|
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||
| lastDataType = event.dataType; | ||
| // use local selection transfer if possible | ||
| if (LocalSelectionTransfer.getTransfer().isSupportedType(event.dataType)) { | ||
| event.data = LocalSelectionTransfer.getTransfer().getSelection(); | ||
| return; | ||
| } | ||
| // use resource transfer if possible | ||
| if (ResourceTransfer.getInstance().isSupportedType(event.dataType)) { | ||
| event.data = resources; | ||
| return; | ||
| } | ||
| // resort to a file transfer | ||
| if (!FileTransfer.getInstance().isSupportedType(event.dataType)) { | ||
| return; | ||
| } | ||
|
|
||
| // Get the path of each file and set as the drag data | ||
| final int length = resources.length; | ||
| int actualLength = 0; | ||
| String[] fileNames = new String[length]; | ||
| for (int i = 0; i < length; i++) { | ||
| IPath location = resources[i].getLocation(); | ||
| // location may be null. See bug 29491. | ||
| if (location != null) { | ||
| fileNames[actualLength++] = location.toOSString(); | ||
| } | ||
| } | ||
| if (actualLength == 0) { | ||
| return; | ||
| } | ||
| // was one or more of the locations null? | ||
| if (actualLength < length) { | ||
| String[] tempFileNames = fileNames; | ||
| fileNames = new String[actualLength]; | ||
| System.arraycopy(tempFileNames, 0, fileNames, 0, actualLength); | ||
| } | ||
| event.data = fileNames; | ||
| } | ||
|
|
||
| /** | ||
| * This implementation of {@link DragSourceListener#dragStart(DragSourceEvent)} | ||
| * allows the drag to start if the current Navigator selection contains | ||
| * resources that can be dragged. | ||
| */ | ||
| @Override | ||
| public void dragStart(DragSourceEvent event) { | ||
| lastDataType = null; | ||
| // Workaround for 1GEUS9V | ||
| DragSource dragSource = (DragSource) event.widget; | ||
| Control control = dragSource.getControl(); | ||
| if (control != control.getDisplay().getFocusControl()) { | ||
| event.doit = false; | ||
| return; | ||
| } | ||
|
|
||
| IStructuredSelection selection = (IStructuredSelection) selectionProvider.getSelection(); | ||
| for (Object next : selection) { | ||
| if (!(next instanceof IFile || next instanceof IFolder)) { | ||
| event.doit = false; | ||
| return; | ||
| } | ||
| } | ||
| if (selection.isEmpty()) { | ||
| event.doit = false; | ||
| return; | ||
| } | ||
| LocalSelectionTransfer.getTransfer().setSelection(selection); | ||
| event.doit = true; | ||
| } | ||
|
|
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| private IResource[] getSelectedResources(int resourceTypes) { | ||
| List<IResource> resources = new ArrayList<>(); | ||
|
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| ISelection selection = selectionProvider.getSelection(); | ||
| if (!(selection instanceof IStructuredSelection) || selection.isEmpty()) { | ||
| return null; | ||
| } | ||
| IStructuredSelection structuredSelection = (IStructuredSelection) selection; | ||
|
|
||
| // loop through list and look for matching items | ||
| for (Object obj : structuredSelection) { | ||
| if (obj instanceof IResource) { | ||
| IResource res = (IResource) obj; | ||
| if ((res.getType() & resourceTypes) == res.getType()) { | ||
| resources.add(res); | ||
| } | ||
| } | ||
| } | ||
| IResource[] result = new IResource[resources.size()]; | ||
| resources.toArray(result); | ||
| return result; | ||
| } | ||
| } |