--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/viewers/TreeViewerRow.d	Mon Mar 31 00:47:19 2008 +0200
@@ -0,0 +1,321 @@
+/*******************************************************************************
+ * Copyright (c) 2006, 2007 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 for bug 174355, 171126
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+
+module dwtx.jface.viewers.TreeViewerRow;
+
+import dwtx.jface.viewers.ViewerRow;
+import dwtx.jface.viewers.TreePath;
+
+import tango.util.collection.LinkSeq;
+
+import dwt.graphics.Color;
+import dwt.graphics.Font;
+import dwt.graphics.Image;
+import dwt.graphics.Rectangle;
+import dwt.widgets.Control;
+import dwt.widgets.Tree;
+import dwt.widgets.TreeItem;
+import dwt.widgets.Widget;
+import dwtx.core.runtime.Assert;
+
+import dwt.dwthelper.utils;
+
+/**
+ * TreeViewerRow is the Tree implementation of ViewerRow.
+ * @since 3.3
+ *
+ */
+public class TreeViewerRow : ViewerRow {
+    private TreeItem item;
+
+    /**
+     * Create a new instance of the receiver.
+     * @param item
+     */
+    this(TreeItem item) {
+        this.item = item;
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#getBounds(int)
+     */
+    public Rectangle getBounds(int columnIndex) {
+        return item.getBounds(columnIndex);
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#getBounds()
+     */
+    public Rectangle getBounds() {
+        return item.getBounds();
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#getColumnCount()
+     */
+    public int getColumnCount() {
+        return item.getParent().getColumnCount();
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#getItem()
+     */
+    public Widget getItem() {
+        return item;
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#getBackground(int)
+     */
+    public Color getBackground(int columnIndex) {
+        return item.getBackground(columnIndex);
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#getFont(int)
+     */
+    public Font getFont(int columnIndex) {
+        return item.getFont(columnIndex);
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#getForeground(int)
+     */
+    public Color getForeground(int columnIndex) {
+        return item.getForeground(columnIndex);
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#getImage(int)
+     */
+    public Image getImage(int columnIndex) {
+        return item.getImage(columnIndex);
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#getText(int)
+     */
+    public String getText(int columnIndex) {
+        return item.getText(columnIndex);
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#setBackground(int, dwt.graphics.Color)
+     */
+    public void setBackground(int columnIndex, Color color) {
+        item.setBackground(columnIndex, color);
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#setFont(int, dwt.graphics.Font)
+     */
+    public void setFont(int columnIndex, Font font) {
+        item.setFont(columnIndex, font);
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#setForeground(int, dwt.graphics.Color)
+     */
+    public void setForeground(int columnIndex, Color color) {
+        item.setForeground(columnIndex, color);
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#setImage(int, dwt.graphics.Image)
+     */
+    public void setImage(int columnIndex, Image image) {
+        Image oldImage = item.getImage(columnIndex);
+        if (image !is oldImage) {
+            item.setImage(columnIndex, image);
+        }
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#setText(int, java.lang.String)
+     */
+    public void setText(int columnIndex, String text) {
+        item.setText(columnIndex, text is null ? "" : text); //$NON-NLS-1$
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ViewerRow#getControl()
+     */
+    public Control getControl() {
+        return item.getParent();
+    }
+
+
+    public ViewerRow getNeighbor(int direction, bool sameLevel) {
+        if( direction is ViewerRow.ABOVE ) {
+            return getRowAbove(sameLevel);
+        } else if( direction is ViewerRow.BELOW ) {
+            return getRowBelow(sameLevel);
+        } else {
+            throw new IllegalArgumentException("Illegal value of direction argument."); //$NON-NLS-1$
+        }
+    }
+
+    private ViewerRow getRowBelow(bool sameLevel) {
+        Tree tree = item.getParent();
+
+        // This means we have top-level item
+        if( item.getParentItem() is null ) {
+            if( sameLevel || ! item.getExpanded() ) {
+                int index = tree.indexOf(item) + 1;
+
+                if( index < tree.getItemCount() ) {
+                    return new TreeViewerRow(tree.getItem(index));
+                }
+            } else if( item.getExpanded() && item.getItemCount() > 0 ) {
+                return new TreeViewerRow(item.getItem(0));
+            }
+        } else {
+            if( sameLevel || ! item.getExpanded() ) {
+                TreeItem parentItem = item.getParentItem();
+
+                int nextIndex = parentItem.indexOf(item) + 1;
+                int totalIndex = parentItem.getItemCount();
+
+                TreeItem itemAfter;
+
+                // This would mean that it was the last item
+                if( nextIndex is totalIndex ) {
+                    itemAfter = findNextItem( parentItem );
+                } else {
+                    itemAfter = parentItem.getItem(nextIndex);
+                }
+
+                if( itemAfter !is null ) {
+                    return new TreeViewerRow(itemAfter);
+                }
+
+            } else if( item.getExpanded() && item.getItemCount() > 0 ) {
+                return new TreeViewerRow(item.getItem(0));
+            }
+        }
+
+        return null;
+    }
+
+    private ViewerRow getRowAbove(bool sameLevel) {
+        Tree tree = item.getParent();
+
+        // This means we have top-level item
+        if( item.getParentItem() is null ) {
+            int index = tree.indexOf(item) - 1;
+            TreeItem nextTopItem = null;
+
+            if( index >= 0 ) {
+                nextTopItem = tree.getItem(index);
+            }
+
+            if( nextTopItem !is null ) {
+                if( sameLevel ) {
+                    return new TreeViewerRow(nextTopItem);
+                }
+
+                return new TreeViewerRow(findLastVisibleItem(nextTopItem));
+            }
+        } else {
+            TreeItem parentItem = item.getParentItem();
+            int previousIndex = parentItem.indexOf(item) - 1;
+
+            TreeItem itemBefore;
+            if( previousIndex >= 0 ) {
+                if( sameLevel ) {
+                    itemBefore = parentItem.getItem(previousIndex);
+                } else {
+                    itemBefore = findLastVisibleItem(parentItem.getItem(previousIndex));
+                }
+            } else {
+                itemBefore = parentItem;
+            }
+
+            if( itemBefore !is null ) {
+                return new TreeViewerRow(itemBefore);
+            }
+        }
+
+        return null;
+    }
+
+    private TreeItem findLastVisibleItem(TreeItem parentItem) {
+        TreeItem rv = parentItem;
+
+        while( rv.getExpanded() && rv.getItemCount() > 0 ) {
+            rv = rv.getItem(rv.getItemCount()-1);
+        }
+
+        return rv;
+    }
+
+    private TreeItem findNextItem(TreeItem item) {
+        TreeItem rv = null;
+        Tree tree = item.getParent();
+        TreeItem parentItem = item.getParentItem();
+
+        int nextIndex;
+        int totalItems;
+
+        if( parentItem is null ) {
+            nextIndex = tree.indexOf(item) + 1;
+            totalItems = tree.getItemCount();
+        } else {
+            nextIndex = parentItem.indexOf(item) + 1;
+            totalItems = parentItem.getItemCount();
+        }
+
+        // This is once more the last item in the tree
+        // Search on
+        if( nextIndex is totalItems ) {
+            if( item.getParentItem() !is null ) {
+                rv = findNextItem(item.getParentItem());
+            }
+        } else {
+            if( parentItem is null ) {
+                rv = tree.getItem(nextIndex);
+            } else {
+                rv = parentItem.getItem(nextIndex);
+            }
+        }
+
+        return rv;
+    }
+
+    public TreePath getTreePath() {
+        TreeItem tItem = item;
+        auto segments = new LinkSeq!(Object);
+        while (tItem !is null) {
+            Object segment = tItem.getData();
+            Assert.isNotNull(segment);
+            segments.prepend(segment);
+            tItem = tItem.getParentItem();
+        }
+
+        return new TreePath(segments.toArray());
+    }
+
+    void setItem(TreeItem item) {
+        this.item = item;
+    }
+
+    public Object clone() {
+        return new TreeViewerRow(item);
+    }
+
+    public Object getElement() {
+        return item.getData();
+    }
+}