--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/preference/PreferenceContentProvider.d	Sat Apr 05 01:45:47 2008 +0200
@@ -0,0 +1,118 @@
+/*******************************************************************************
+ * Copyright (c) 2003, 2006 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.jface.preference.PreferenceContentProvider;
+
+import dwtx.jface.preference.IPreferenceNode;
+import dwtx.jface.preference.PreferenceManager;
+
+import dwtx.jface.viewers.ITreeContentProvider;
+import dwtx.jface.viewers.Viewer;
+
+import dwt.dwthelper.utils;
+
+/**
+ * Provides a tree model for <code>PreferenceManager</code> content.
+ *
+ * @since 3.0
+ */
+public class PreferenceContentProvider : ITreeContentProvider {
+
+    private PreferenceManager manager;
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.IContentProvider#dispose()
+     */
+    public void dispose() {
+        manager = null;
+    }
+
+    /**
+     * Find the parent of the provided node.  Will search recursivly through the
+     * preference tree.
+     *
+     * @param parent the possible parent node.
+     * @param target the target child node.
+     * @return the parent node of the child node.
+     */
+    private IPreferenceNode findParent(IPreferenceNode parent,
+            IPreferenceNode target) {
+        if (parent.getId().equals(target.getId())) {
+            return null;
+        }
+
+        IPreferenceNode found = parent.findSubNode(target.getId());
+        if (found !is null) {
+            return parent;
+        }
+
+        IPreferenceNode[] children = parent.getSubNodes();
+
+        for (int i = 0; i < children.length; i++) {
+            found = findParent(children[i], target);
+            if (found !is null) {
+                return found;
+            }
+        }
+
+        return null;
+    }
+
+    /*
+     *  (non-Javadoc)
+     * @see dwtx.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
+     */
+    public Object[] getChildren(Object parentElement) {//must be an instance of <code>IPreferenceNode</code>.
+        return arraycast!(Object)((cast(IPreferenceNode) parentElement).getSubNodes());
+    }
+
+    /*
+     *  (non-Javadoc)
+     * @see dwtx.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
+     */
+    public Object[] getElements(Object inputElement) {// must be an instance of <code>PreferenceManager</code>.
+        return getChildren(cast(Object)(cast(PreferenceManager) inputElement).getRoot_package());
+    }
+
+    /*
+     *  (non-Javadoc)
+     * @see dwtx.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
+     */
+    public Object getParent(Object element) {//must be an instance of <code>IPreferenceNode</code>.
+        IPreferenceNode targetNode = cast(IPreferenceNode) element;
+        IPreferenceNode root = manager.getRoot_package();
+        return cast(Object)findParent(root, targetNode);
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
+     */
+    public bool hasChildren(Object element) {
+        return getChildren(element).length > 0;
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.viewers.IContentProvider#inputChanged(dwtx.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
+     */
+    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
+        manager = cast(PreferenceManager) newInput;
+    }
+    /**
+     * Set the manager for the preferences.
+     * @param manager The manager to set.
+     *
+     * @since 3.1
+     */
+    protected void setManager(PreferenceManager manager) {
+        this.manager = manager;
+    }
+}