### Eclipse Workspace Patch 1.0
#P org.eclipse.mylyn.team.ui
Index: plugin.xml
===================================================================
RCS file: /cvsroot/tools/org.eclipse.mylyn/org.eclipse.mylyn.team.ui/plugin.xml,v
retrieving revision 1.34
diff -u -r1.34 plugin.xml
--- plugin.xml	1 Nov 2007 22:38:37 -0000	1.34
+++ plugin.xml	12 Dec 2007 18:40:15 -0000
@@ -104,12 +104,15 @@
                id="org.eclipse.mylyn.team.ui.ui.patch.apply"
                label="Apply Patch..."
                menubarPath="actions"
-               tooltip="Apply from Repository Task Attachment">
+               tooltip="Apply from Repository Task Attachment"
+               enablesFor="1">
+            <!--
             <enablement>
                <objectClass
                      name="org.eclipse.mylyn.tasks.core.RepositoryAttachment">
                </objectClass>
             </enablement>
+            -->
          </action>
       </objectContribution>
    </extension>
#P org.eclipse.mylyn.context.ui
Index: plugin.xml
===================================================================
RCS file: /cvsroot/tools/org.eclipse.mylyn/org.eclipse.mylyn.context.ui/plugin.xml,v
retrieving revision 1.140
diff -u -r1.140 plugin.xml
--- plugin.xml	7 Nov 2007 00:52:09 -0000	1.140
+++ plugin.xml	12 Dec 2007 18:40:15 -0000
@@ -53,8 +53,8 @@
                icon="icons/etool16/context-retrieve.gif"
                id="org.eclipse.mylyn.context.ui.repository.task.retrieve"
                label="Retrieve Context..."
-               menubarPath="actions">
-         </action>
+               menubarPath="actions"
+               enablesFor="1"/>
       </objectContribution>
 	 <!--
 	 <objectContribution
#P org.eclipse.mylyn.tasks.ui
Index: META-INF/MANIFEST.MF
===================================================================
RCS file: /cvsroot/tools/org.eclipse.mylyn/org.eclipse.mylyn.tasks.ui/META-INF/MANIFEST.MF,v
retrieving revision 1.384
diff -u -r1.384 MANIFEST.MF
--- META-INF/MANIFEST.MF	5 Dec 2007 18:56:13 -0000	1.384
+++ META-INF/MANIFEST.MF	12 Dec 2007 18:40:16 -0000
@@ -24,7 +24,8 @@
  org.eclipse.mylyn,
  org.eclipse.ui.net,
  org.eclipse.mylyn.web.core,
- org.eclipse.core.net
+ org.eclipse.core.net,
+ org.eclipse.compare
 Eclipse-AutoStart: true
 Bundle-Vendor: Eclipse.org
 Export-Package: org.eclipse.mylyn.internal.tasks.ui,
Index: src/org/eclipse/mylyn/tasks/ui/editors/AbstractRepositoryTaskEditor.java
===================================================================
RCS file: /cvsroot/tools/org.eclipse.mylyn/org.eclipse.mylyn.tasks.ui/src/org/eclipse/mylyn/tasks/ui/editors/AbstractRepositoryTaskEditor.java,v
retrieving revision 1.251
diff -u -r1.251 AbstractRepositoryTaskEditor.java
--- src/org/eclipse/mylyn/tasks/ui/editors/AbstractRepositoryTaskEditor.java	12 Dec 2007 02:36:39 -0000	1.251
+++ src/org/eclipse/mylyn/tasks/ui/editors/AbstractRepositoryTaskEditor.java	12 Dec 2007 18:40:16 -0000
@@ -61,6 +61,7 @@
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.ISelectionProvider;
+import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.StructuredSelection;
@@ -399,6 +400,11 @@
 							// "Changed - " + repositoryTask.getSummary(),
 							// "Editor will Test with new incoming
 							// changes.");
+							parentEditor.getTopForm().addMessageHyperlinkListener(new HyperlinkAdapter() {
+								public void linkActivated(HyperlinkEvent e) {
+									refreshEditor();
+								}
+							});
 							parentEditor.setMessage("Task has incoming changes, synchronize to view",
 									IMessageProvider.WARNING);
 
@@ -1378,7 +1384,7 @@
 
 		if (taskData.getAttachments().size() > 0) {
 
-			attachmentsTable = toolkit.createTable(attachmentsComposite, SWT.SINGLE | SWT.BORDER | SWT.FULL_SELECTION);
+			attachmentsTable = toolkit.createTable(attachmentsComposite, SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION);
 			attachmentsTable.setLinesVisible(true);
 			attachmentsTable.setHeaderVisible(true);
 			attachmentsTable.setLayout(new GridLayout());
@@ -1550,31 +1556,34 @@
 				public void menuAboutToShow(IMenuManager manager) {
 					popupMenu.removeAll();
 
-					ISelection selection = attachmentsTableViewer.getSelection();
+					IStructuredSelection selection = (IStructuredSelection) attachmentsTableViewer.getSelection();
 					if (selection.isEmpty()) {
 						return;
 					}
 
-					RepositoryAttachment att = (RepositoryAttachment) ((StructuredSelection) selection).getFirstElement();
+					if (selection.size() == 1) {
+						RepositoryAttachment att = (RepositoryAttachment) ((StructuredSelection) selection).getFirstElement();
 
-					// reinitialize menu
-					popupMenu.add(openMenu);
-					openMenu.removeAll();
-					IStorageEditorInput input = new RepositoryAttachmentEditorInput(repository, att);
-					IEditorDescriptor desc = PlatformUI.getWorkbench().getEditorRegistry().getDefaultEditor(
-							input.getName());
-					if (desc != null) {
-						openMenu.add(openWithDefaultAction);
-					}
-					openMenu.add(openWithBrowserAction);
-					openMenu.add(openWithTextEditorAction);
-
-					popupMenu.add(new Separator());
-					popupMenu.add(saveAction);
-
-					popupMenu.add(copyURLToClipAction);
-					if (att.getContentType().startsWith(CTYPE_TEXT) || att.getContentType().endsWith("xml")) {
-						popupMenu.add(copyToClipAction);
+						// reinitialize open menu
+						popupMenu.add(openMenu);
+						openMenu.removeAll();
+
+						IStorageEditorInput input = new RepositoryAttachmentEditorInput(repository, att);
+						IEditorDescriptor desc = PlatformUI.getWorkbench().getEditorRegistry().getDefaultEditor(
+								input.getName());
+						if (desc != null) {
+							openMenu.add(openWithDefaultAction);
+						}
+						openMenu.add(openWithBrowserAction);
+						openMenu.add(openWithTextEditorAction);
+
+						popupMenu.add(new Separator());
+						popupMenu.add(saveAction);
+
+						popupMenu.add(copyURLToClipAction);
+						if (att.getContentType().startsWith(CTYPE_TEXT) || att.getContentType().endsWith("xml")) {
+							popupMenu.add(copyToClipAction);
+						}
 					}
 					popupMenu.add(new Separator("actions"));
 
Index: plugin.xml
===================================================================
RCS file: /cvsroot/tools/org.eclipse.mylyn/org.eclipse.mylyn.tasks.ui/plugin.xml,v
retrieving revision 1.280
diff -u -r1.280 plugin.xml
--- plugin.xml	12 Dec 2007 04:11:35 -0000	1.280
+++ plugin.xml	12 Dec 2007 18:40:16 -0000
@@ -561,6 +561,19 @@
          </action>      
       </viewerContribution>
       
+      <objectContribution
+            adaptable="false"
+            id="org.eclipse.mylyn.tasks.ui.contribution.attachment.compare"
+            objectClass="org.eclipse.mylyn.tasks.core.RepositoryAttachment">
+         <action
+               id="org.eclipse.mylyn.tasks.ui.action.attachment.compare"
+               class="org.eclipse.mylyn.internal.tasks.ui.actions.CompareAttachmentsAction"
+               label="Compare..."
+               menubarPath="actions"
+               tooltip="Compare attachments"
+               enablesFor="2"/>
+      </objectContribution>
+
    </extension>
 
   <extension point="org.eclipse.ui.preferencePages">
Index: src/org/eclipse/mylyn/internal/tasks/ui/actions/CompareAttachmentsAction.java
===================================================================
RCS file: src/org/eclipse/mylyn/internal/tasks/ui/actions/CompareAttachmentsAction.java
diff -N src/org/eclipse/mylyn/internal/tasks/ui/actions/CompareAttachmentsAction.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ src/org/eclipse/mylyn/internal/tasks/ui/actions/CompareAttachmentsAction.java	1 Jan 1970 00:00:00 -0000
@@ -0,0 +1,181 @@
+/*******************************************************************************
+ * Copyright (c) 2004, 2007 Mylyn project committers and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *******************************************************************************/
+
+package org.eclipse.mylyn.internal.tasks.ui.actions;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
+
+import org.eclipse.compare.CompareConfiguration;
+import org.eclipse.compare.CompareEditorInput;
+import org.eclipse.compare.CompareUI;
+import org.eclipse.compare.IStreamContentAccessor;
+import org.eclipse.compare.ITypedElement;
+import org.eclipse.compare.structuremergeviewer.DiffNode;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.jface.action.IAction;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.mylyn.internal.tasks.ui.TasksUiImages;
+import org.eclipse.mylyn.tasks.core.AbstractAttachmentHandler;
+import org.eclipse.mylyn.tasks.core.AbstractRepositoryConnector;
+import org.eclipse.mylyn.tasks.core.RepositoryAttachment;
+import org.eclipse.mylyn.tasks.core.TaskRepository;
+import org.eclipse.mylyn.tasks.ui.TasksUiPlugin;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.ui.ISharedImages;
+import org.eclipse.ui.IViewActionDelegate;
+import org.eclipse.ui.IViewPart;
+import org.eclipse.ui.actions.BaseSelectionListenerAction;
+import org.eclipse.ui.internal.WorkbenchImages;
+
+/**
+ * @author Eugene Kuleshov
+ */
+public class CompareAttachmentsAction extends BaseSelectionListenerAction implements IViewActionDelegate {
+
+	private ISelection currentSelection;
+
+	public CompareAttachmentsAction() {
+		super("Compare Attachments");
+	}
+
+	protected CompareAttachmentsAction(String text) {
+		super(text);
+	}
+
+	public void init(IViewPart view) {
+		// ignore
+	}
+
+	public void run(IAction action) {
+		if (currentSelection instanceof IStructuredSelection) {
+			IStructuredSelection selection = (IStructuredSelection) currentSelection;
+			Object[] elements = selection.toArray();
+
+			final RepositoryAttachment attachment1 = (RepositoryAttachment) elements[0];
+			final RepositoryAttachment attachment2 = (RepositoryAttachment) elements[1];
+
+			CompareConfiguration cc = new CompareConfiguration();
+			
+			cc.setLeftEditable(false);
+			cc.setLeftLabel(attachment1.getFilename());
+			cc.setLeftImage(getImage(attachment1));
+
+			cc.setRightEditable(false);
+			cc.setRightLabel(attachment2.getFilename());
+			cc.setRightImage(getImage(attachment2));
+			
+			CompareEditorInput editorInput = new CompareEditorInput(cc) {
+				
+				public String getTitle() {
+					return "Compare (" + attachment1.getFilename() + " - " + attachment2.getFilename() + ")";
+				}
+				
+				protected Object prepareInput(IProgressMonitor pm) throws InvocationTargetException {
+					byte[] data1 = downloadAttachment(attachment1, pm);
+					byte[] data2 = downloadAttachment(attachment2, pm);
+					CompareItem left = new CompareItem(attachment1.getFilename(), data1);
+					CompareItem right = new CompareItem(attachment2.getFilename(), data2);
+					return new DiffNode(left, right);
+				}
+
+				private byte[] downloadAttachment(RepositoryAttachment attachment, IProgressMonitor pm)
+						throws InvocationTargetException {
+					try {
+						TaskRepository repository = TasksUiPlugin.getRepositoryManager().getRepository(
+								attachment.getRepositoryKind(), attachment.getRepositoryUrl());
+						AbstractRepositoryConnector connector = TasksUiPlugin.getRepositoryManager()
+								.getRepositoryConnector(attachment.getRepositoryKind());
+						AbstractAttachmentHandler handler = connector.getAttachmentHandler();
+
+						ByteArrayOutputStream os = new ByteArrayOutputStream();
+						handler.downloadAttachment(repository, attachment, os, pm);
+						return os.toByteArray();
+					} catch (CoreException ex) {
+						throw new InvocationTargetException(ex);
+					}
+				}
+			};
+
+			CompareUI.openCompareEditor(editorInput);
+		}
+	}
+
+	private static final String[] IMAGE_EXTENSIONS = { ".jpg", ".gif", ".png", ".tiff", ".tif", ".bmp" };
+	
+	private Image getImage(RepositoryAttachment attachment) {
+		if (isContext(attachment)) {
+			return TasksUiImages.getImage(TasksUiImages.CONTEXT_TRANSFER);
+		} else if (attachment.isPatch()) {
+			return TasksUiImages.getImage(TasksUiImages.ATTACHMENT_PATCH);
+		} else {
+			String filename = attachment.getFilename();
+			if (filename != null) {
+				filename = filename.toLowerCase();
+				for (String extension : IMAGE_EXTENSIONS) {
+					if (filename.endsWith(extension)) {
+						return TasksUiImages.getImage(TasksUiImages.IMAGE_FILE);
+					}
+				}
+			}
+			return WorkbenchImages.getImage(ISharedImages.IMG_OBJ_FILE);
+		}
+	}
+
+	private boolean isContext(RepositoryAttachment attachment) {
+		return AbstractAttachmentHandler.MYLAR_CONTEXT_DESCRIPTION.equals(attachment.getDescription())
+				|| AbstractAttachmentHandler.MYLAR_CONTEXT_DESCRIPTION_LEGACY.equals(attachment.getDescription());
+	}
+	
+	public void selectionChanged(IAction action, ISelection selection) {
+		this.currentSelection = selection;
+	}
+
+	class CompareItem implements IStreamContentAccessor, ITypedElement {
+
+		private final String filename;
+		private final byte[] data;
+
+		public CompareItem(String filename, byte[] data) {
+			this.filename = filename;
+			this.data = data;
+		}
+
+		public InputStream getContents() throws CoreException {
+			return new ByteArrayInputStream(data);
+		}
+
+		public Image getImage() {
+			return null;
+		}
+
+		public String getName() {
+			return filename;
+		}
+
+		public String getType() {
+			// ImageMergeViewerCreator - gif,jpg,jpeg,png,bmp,ico,tif,tiff
+			// BinaryCompareViewerCreator - class,exe,dll,binary,zip,jar
+			// TextMergeViewerCreator - txt
+			// PropertiesFileMergeViewerCreator - properties,properties2
+			// JavaContentViewerCreator - java,java2"
+			// RefactoringDescriptorCompareViewerCreator - refactoring_descriptor
+			// 
+			int n = filename.lastIndexOf('.'); 
+			if(n>-1) {
+				return filename.substring(n+1);
+			}
+			
+			return ITypedElement.TEXT_TYPE;
+		}
+	}
+}