--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewerFocusCellManager.d	Sat Mar 14 18:23:29 2009 +0100
@@ -0,0 +1,158 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2008 IBM Corporation 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
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *     Tom Schindl<tom.schindl@bestsolution.at> - initial API and implementation
+ *                                              - fix in bug: 195908, 210752
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+
+module org.eclipse.jface.viewers.TreeViewerFocusCellManager;
+
+import org.eclipse.jface.viewers.SWTFocusCellManager;
+import org.eclipse.jface.viewers.CellNavigationStrategy;
+import org.eclipse.jface.viewers.TreeViewer;
+import org.eclipse.jface.viewers.FocusCellHighlighter;
+import org.eclipse.jface.viewers.ViewerCell;
+import org.eclipse.jface.viewers.ColumnViewer;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.widgets.Event;
+import org.eclipse.swt.widgets.Item;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.swt.widgets.TreeItem;
+
+import java.lang.all;
+import java.util.Set;
+
+/**
+ * This class is responsible to provide the concept of cells for {@link Tree}.
+ * This concept is needed to provide features like editor activation with the
+ * keyboard
+ *
+ * @since 3.3
+ *
+ */
+public class TreeViewerFocusCellManager : SWTFocusCellManager {
+    private static /+final+/ CellNavigationStrategy TREE_NAVIGATE;
+    static this(){
+        TREE_NAVIGATE = new class CellNavigationStrategy {
+            public void collapse(ColumnViewer viewer, ViewerCell cellToCollapse,
+                    Event event) {
+                if (cellToCollapse !is null) {
+                    (cast(TreeItem) cellToCollapse.getItem()).setExpanded(false);
+                }
+            }
+
+            public void expand(ColumnViewer viewer, ViewerCell cellToExpand,
+                    Event event) {
+                if (cellToExpand !is null) {
+                    TreeViewer v = cast(TreeViewer) viewer;
+                    v.setExpandedState(v.getTreePathFromItem_package(cast(Item)cellToExpand
+                            .getItem()), true);
+                }
+            }
+
+            public bool isCollapseEvent(ColumnViewer viewer,
+                    ViewerCell cellToCollapse, Event event) {
+
+            if (cellToCollapse is null) {
+                return false;
+            }
+
+                return cellToCollapse !is null
+                    && (cast(TreeItem) cellToCollapse.getItem()).getExpanded()
+                    && event.keyCode is SWT.ARROW_LEFT
+                    && isFirstColumnCell(cellToCollapse);
+            }
+
+            public bool isExpandEvent(ColumnViewer viewer,
+                    ViewerCell cellToExpand, Event event) {
+
+            if (cellToExpand is null) {
+                return false;
+            }
+
+                return cellToExpand !is null
+                    && (cast(TreeItem) cellToExpand.getItem()).getItemCount() > 0
+                    && !(cast(TreeItem) cellToExpand.getItem()).getExpanded()
+                    && event.keyCode is SWT.ARROW_RIGHT
+                    && isFirstColumnCell(cellToExpand);
+        }
+
+        private bool isFirstColumnCell(ViewerCell cell) {
+            return cell.getViewerRow().getVisualIndex_package(cell.getColumnIndex()) is 0;
+        }
+        };
+    }
+
+    /**
+     * Create a new manager using a default navigation strategy:
+     * <ul>
+     * <li><code>SWT.ARROW_UP</code>: navigate to cell above</li>
+     * <li><code>SWT.ARROW_DOWN</code>: navigate to cell below</li>
+     * <li><code>SWT.ARROW_RIGHT</code>: on first column (collapses if item
+     * is expanded) else navigate to next visible cell on the right</li>
+     * <li><code>SWT.ARROW_LEFT</code>: on first column (expands if item is
+     * collapsed) else navigate to next visible cell on the left</li>
+     * </ul>
+     *
+     * @param viewer
+     *            the viewer the manager is bound to
+     * @param focusDrawingDelegate
+     *            the delegate responsible to highlight selected cell
+     */
+    public this(TreeViewer viewer,
+            FocusCellHighlighter focusDrawingDelegate) {
+        this(viewer, focusDrawingDelegate, TREE_NAVIGATE);
+    }
+
+    /**
+     * Create a new manager with a custom navigation strategy
+     *
+     * @param viewer
+     *            the viewer the manager is bound to
+     * @param focusDrawingDelegate
+     *            the delegate responsible to highlight selected cell
+     * @param navigationStrategy
+     *            the strategy used to navigate the cells
+     * @since 3.4
+     */
+    public this(TreeViewer viewer,
+            FocusCellHighlighter focusDrawingDelegate,
+            CellNavigationStrategy navigationStrategy) {
+        super(viewer, focusDrawingDelegate, navigationStrategy);
+    }
+
+    override ViewerCell getInitialFocusCell() {
+        Tree tree = cast(Tree) getViewer().getControl();
+
+        if (! tree.isDisposed() && tree.getItemCount() > 0 && ! tree.getItem(0).isDisposed()) {
+            return getViewer().getViewerRowFromItem_package(tree.getItem(0)).getCell(0);
+        }
+
+        return null;
+    }
+
+    public ViewerCell getFocusCell() {
+        ViewerCell cell = super.getFocusCell();
+        Tree t = cast(Tree) getViewer().getControl();
+
+        // It is possible that the selection has changed under the hood
+        if (cell !is null) {
+            if (t.getSelection().length is 1
+                    && t.getSelection()[0] !is cell.getItem()) {
+                setFocusCell(getViewer().getViewerRowFromItem_package(
+                        t.getSelection()[0]).getCell(cell.getColumnIndex()));
+            }
+        }
+
+        return super.getFocusCell();
+    }
+}