--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceNode.d	Sat Mar 14 18:23:29 2009 +0100
@@ -0,0 +1,290 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module org.eclipse.jface.preference.PreferenceNode;
+
+import org.eclipse.jface.preference.IPreferenceNode;
+import org.eclipse.jface.preference.IPreferencePage;
+
+
+// import java.util.List;
+
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.jface.resource.ImageDescriptor;
+
+import java.lang.all;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Set;
+
+/**
+ * A concrete implementation of a node in a preference dialog tree. This class
+ * also supports lazy creation of the node's preference page.
+ */
+public class PreferenceNode : IPreferenceNode {
+    /**
+     * Preference page, or <code>null</code> if not yet loaded.
+     */
+    private IPreferencePage page;
+
+    /**
+     * The list of subnodes (immediate children) of this node (element type:
+     * <code>IPreferenceNode</code>).
+     */
+    private List subNodes;
+
+    /**
+     * Name of a class that implements <code>IPreferencePage</code>, or
+     * <code>null</code> if none.
+     */
+    private String classname;
+
+    /**
+     * The id of this node.
+     */
+    private String id;
+
+    /**
+     * Text label for this node. Note that this field is only used prior to the
+     * creation of the preference page.
+     */
+    private String label;
+
+    /**
+     * Image descriptor for this node, or <code>null</code> if none.
+     */
+    private ImageDescriptor imageDescriptor;
+
+    /**
+     * Cached image, or <code>null</code> if none.
+     */
+    private Image image;
+
+    /**
+     * Creates a new preference node with the given id. The new node has no
+     * subnodes.
+     *
+     * @param id
+     *            the node id
+     */
+    public this(String id) {
+        Assert.isNotNull(id);
+        this.id = id;
+    }
+
+    /**
+     * Creates a preference node with the given id, label, and image, and
+     * lazily-loaded preference page. The preference node assumes (sole)
+     * responsibility for disposing of the image; this will happen when the node
+     * is disposed.
+     *
+     * @param id
+     *            the node id
+     * @param label
+     *            the label used to display the node in the preference dialog's
+     *            tree
+     * @param image
+     *            the image displayed left of the label in the preference
+     *            dialog's tree, or <code>null</code> if none
+     * @param className
+     *            the class name of the preference page; this class must
+     *            implement <code>IPreferencePage</code>
+     */
+    public this(String id, String label, ImageDescriptor image,
+            String className) {
+        this(id);
+        this.imageDescriptor = image;
+        Assert.isNotNull(label);
+        this.label = label;
+        this.classname = className;
+    }
+
+    /**
+     * Creates a preference node with the given id and preference page. The
+     * title of the preference page is used for the node label. The node will
+     * not have an image.
+     *
+     * @param id
+     *            the node id
+     * @param preferencePage
+     *            the preference page
+     */
+    public this(String id, IPreferencePage preferencePage) {
+        this(id);
+        Assert.isNotNull(cast(Object)preferencePage);
+        page = preferencePage;
+    }
+
+    /*
+     * (non-Javadoc) Method declared on IPreferenceNode.
+     */
+    public void add(IPreferenceNode node) {
+        if (subNodes is null) {
+            subNodes = new ArrayList();
+        }
+        subNodes.add(cast(Object)node);
+    }
+
+    /**
+     * Creates a new instance of the given class <code>className</code>.
+     *
+     * @param className
+     * @return new Object or <code>null</code> in case of failures.
+     */
+    private Object createObject(String className) {
+        Assert.isNotNull(className);
+//         try {
+            ClassInfo cl = ClassInfo.find(className);
+            if (cl !is null) {
+                return cl.create();
+            }
+//         } catch (ClassNotFoundException e) {
+//             return null;
+//         } catch (InstantiationException e) {
+//             return null;
+//         } catch (IllegalAccessException e) {
+//             return null;
+//         } catch (NoSuchMethodError e) {
+//             return null;
+//         }
+        return null;
+    }
+
+    /*
+     * (non-Javadoc) Method declared on IPreferenceNode.
+     */
+    public void createPage() {
+        page = cast(IPreferencePage) createObject(classname);
+        if (getLabelImage() !is null) {
+            page.setImageDescriptor(imageDescriptor);
+        }
+        page.setTitle(label);
+    }
+
+    /**
+     * (non-Javadoc) Method declared on IPreferenceNode.
+     */
+    public void disposeResources() {
+        if (image !is null) {
+            image.dispose();
+            image = null;
+        }
+        if (page !is null) {
+            page.dispose();
+            page = null;
+        }
+    }
+
+    /*
+     * (non-Javadoc) Method declared on IContributionNode.
+     */
+    public IPreferenceNode findSubNode(String id) {
+        Assert.isNotNull(id);
+        Assert.isTrue(id.length > 0);
+        if (subNodes is null) {
+            return null;
+        }
+        int size = subNodes.size();
+        for (int i = 0; i < size; i++) {
+            IPreferenceNode node = cast(IPreferenceNode) subNodes.get(i);
+            if (id.equals(node.getId())) {
+                return node;
+            }
+        }
+        return null;
+    }
+
+    /*
+     * (non-Javadoc) Method declared on IPreferenceNode.
+     */
+    public String getId() {
+        return this.id;
+    }
+
+    /**
+     * Returns the image descriptor for this node.
+     *
+     * @return the image descriptor
+     */
+    protected ImageDescriptor getImageDescriptor() {
+        return imageDescriptor;
+    }
+
+    /*
+     * (non-Javadoc) Method declared on IPreferenceNode.
+     */
+    public Image getLabelImage() {
+        if (image is null && imageDescriptor !is null) {
+            image = imageDescriptor.createImage();
+        }
+        return image;
+    }
+
+    /*
+     * (non-Javadoc) Method declared on IPreferenceNode.
+     */
+    public String getLabelText() {
+        if (page !is null) {
+            return page.getTitle();
+        }
+        return label;
+    }
+
+    /*
+     * (non-Javadoc) Method declared on IPreferenceNode.
+     */
+    public IPreferencePage getPage() {
+        return page;
+    }
+
+    /*
+     * (non-Javadoc) Method declared on IPreferenceNode.
+     */
+    public IPreferenceNode[] getSubNodes() {
+        if (subNodes is null) {
+            return new IPreferenceNode[0];
+        }
+        return arraycast!(IPreferenceNode)( subNodes
+                .toArray());
+    }
+
+    /*
+     * (non-Javadoc) Method declared on IPreferenceNode.
+     */
+    public IPreferenceNode remove(String id) {
+        IPreferenceNode node = findSubNode(id);
+        if (node !is null) {
+            remove(node);
+        }
+        return node;
+    }
+
+    /*
+     * (non-Javadoc) Method declared on IPreferenceNode.
+     */
+    public bool remove(IPreferenceNode node) {
+        if (subNodes is null) {
+            return false;
+        }
+        return subNodes.remove(cast(Object)node);
+    }
+
+    /**
+     * Set the current page to be newPage.
+     *
+     * @param newPage
+     */
+    public void setPage(IPreferencePage newPage) {
+        page = newPage;
+    }
+}