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/******************************************************************************* |
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* Copyright (c) 2004, 2009 Tasktop Technologies and others. |
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* All rights reserved. This program and the accompanying materials |
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* are made available under the terms of the Eclipse Public License v1.0 |
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* which accompanies this distribution, and is available at |
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* http://www.eclipse.org/legal/epl-v10.html |
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* |
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* Contributors: |
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* Tasktop Technologies - initial API and implementation |
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* Jevgeni Holodkov - improvements |
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*******************************************************************************/ |
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package org.eclipse.mylyn.internal.tasks.ui.util; |
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import java.io.File; |
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import java.io.IOException; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import java.util.List; |
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import org.eclipse.core.runtime.IStatus; |
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import org.eclipse.core.runtime.Status; |
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import org.eclipse.jface.util.LocalSelectionTransfer; |
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import org.eclipse.jface.viewers.ISelection; |
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import org.eclipse.jface.viewers.ISelectionProvider; |
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import org.eclipse.jface.viewers.IStructuredSelection; |
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import org.eclipse.mylyn.commons.core.StatusHandler; |
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import org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin; |
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import org.eclipse.mylyn.internal.tasks.ui.actions.CopyTaskDetailsAction; |
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import org.eclipse.mylyn.internal.tasks.ui.actions.SaveAttachmentsAction; |
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import org.eclipse.mylyn.tasks.core.ITaskAttachment; |
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import org.eclipse.swt.dnd.DragSourceAdapter; |
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import org.eclipse.swt.dnd.DragSourceEvent; |
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import org.eclipse.swt.dnd.FileTransfer; |
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import org.eclipse.swt.dnd.TextTransfer; |
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import org.eclipse.swt.dnd.URLTransfer; |
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/** |
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* @author Steffen Pingel |
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*/ |
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public class TaskAttachmentDragSourceListener extends DragSourceAdapter { |
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private IStructuredSelection currentSelection; |
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private final ISelectionProvider selectionProvider; |
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public TaskAttachmentDragSourceListener(ISelectionProvider selectionProvider) { |
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this.selectionProvider = selectionProvider; |
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} |
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@Override |
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public void dragStart(DragSourceEvent event) { |
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ISelection selection = selectionProvider.getSelection(); |
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if (selection instanceof IStructuredSelection && !selection.isEmpty()) { |
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this.currentSelection = (IStructuredSelection) selection; |
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} else { |
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this.currentSelection = null; |
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event.doit = false; |
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} |
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} |
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private List<ITaskAttachment> getAttachments(IStructuredSelection selection) { |
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List<ITaskAttachment> attachments = new ArrayList<ITaskAttachment>(); |
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Iterator<?> it = currentSelection.iterator(); |
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while (it.hasNext()) { |
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Object item = it.next(); |
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if (item instanceof ITaskAttachment) { |
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attachments.add((ITaskAttachment) item); |
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} |
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} |
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return attachments; |
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} |
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@Override |
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public void dragSetData(DragSourceEvent event) { |
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if (currentSelection == null || currentSelection.isEmpty()) { |
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event.doit = false; |
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return; |
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} |
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if (LocalSelectionTransfer.getTransfer().isSupportedType(event.dataType)) { |
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LocalSelectionTransfer.getTransfer().setSelection(currentSelection); |
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} else if (FileTransfer.getInstance().isSupportedType(event.dataType)) { |
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List<ITaskAttachment> attachments = getAttachments(currentSelection); |
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if (!attachments.isEmpty()) { |
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String[] paths = new String[attachments.size()]; |
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File directory; |
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try { |
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directory = File.createTempFile("attachments", null); //$NON-NLS-1$ |
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} catch (IOException e) { |
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StatusHandler.log(new Status(IStatus.ERROR, TasksUiPlugin.ID_PLUGIN, |
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"Problems encountered dragging attachment", //$NON-NLS-1$ |
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e)); |
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event.doit = false; |
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return; |
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} |
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directory.delete(); |
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directory.mkdirs(); |
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int i = 0; |
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for (ITaskAttachment attachment : attachments) { |
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String filename = SaveAttachmentsAction.getAttachmentFilename(attachment); |
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File file = new File(directory, filename); |
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DownloadAttachmentJob job = new DownloadAttachmentJob(attachment, file); |
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job.setUser(true); |
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job.schedule(); |
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paths[i] = file.getAbsolutePath(); |
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i++; |
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} |
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event.data = paths; |
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} else { |
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event.doit = false; |
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} |
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} else if (TextTransfer.getInstance().isSupportedType(event.dataType)) { |
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event.data = CopyTaskDetailsAction.getTextForTask(currentSelection.getFirstElement()); |
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} else if (URLTransfer.getInstance().isSupportedType(event.dataType)) { |
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List<ITaskAttachment> attachments = getAttachments(currentSelection); |
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if (!attachments.isEmpty()) { |
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event.data = attachments.get(0).getUrl(); |
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} |
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} |
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} |
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@Override |
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public void dragFinished(DragSourceEvent event) { |
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if (LocalSelectionTransfer.getTransfer().isSupportedType(event.dataType)) { |
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LocalSelectionTransfer.getTransfer().setSelection(null); |
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} |
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} |
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} |
