--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/dnd/ByteArrayTransfer.d	Mon Mar 02 14:44:16 2009 +0100
@@ -0,0 +1,221 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module org.eclipse.swt.dnd.ByteArrayTransfer;
+
+import org.eclipse.swt.internal.ole.win32.COM;
+import org.eclipse.swt.internal.ole.win32.OBJIDL;
+import org.eclipse.swt.internal.win32.OS;
+
+import org.eclipse.swt.dnd.DND;
+import org.eclipse.swt.dnd.Transfer;
+import org.eclipse.swt.dnd.TransferData;
+
+import java.lang.all;
+
+/**
+ * The class <code>ByteArrayTransfer</code> provides a platform specific
+ * mechanism for converting a java <code>byte[]</code> to a platform
+ * specific representation of the byte array and vice versa.
+ *
+ * <p><code>ByteArrayTransfer</code> is never used directly but is sub-classed
+ * by transfer agents that convert between data in a java format such as a
+ * <code>String</code> and a platform specific byte array.
+ *
+ * <p>If the data you are converting <b>does not</b> map to a
+ * <code>byte[]</code>, you should sub-class <code>Transfer</code> directly
+ * and do your own mapping to a platform data type.</p>
+ *
+ * <p>The following snippet shows a subclass of ByteArrayTransfer that transfers
+ * data defined by the class <code>MyType</code>.</p>
+ *
+ * <pre><code>
+ * public class MyType {
+ *  public String fileName;
+ *  public long fileLength;
+ *  public long lastModified;
+ * }
+ * </code></pre>
+ *
+ * <pre><code>
+ * public class MyTypeTransfer extends ByteArrayTransfer {
+ *
+ *  private static final String MYTYPENAME = "my_type_name";
+ *  private static final int MYTYPEID = registerType(MYTYPENAME);
+ *  private static MyTypeTransfer _instance = new MyTypeTransfer();
+ *
+ * private MyTypeTransfer() {}
+ *
+ * public static MyTypeTransfer getInstance () {
+ *  return _instance;
+ * }
+ * public void javaToNative (Object object, TransferData transferData) {
+ *  if (object is null || !(object instanceof MyType[])) return;
+ *
+ *  if (isSupportedType(transferData)) {
+ *      MyType[] myTypes = (MyType[]) object;
+ *      try {
+ *          // write data to a byte array and then ask super to convert to pMedium
+ *          ByteArrayOutputStream out = new ByteArrayOutputStream();
+ *          DataOutputStream writeOut = new DataOutputStream(out);
+ *          for (int i = 0, length = myTypes.length; i &lt; length;  i++){
+ *              byte[] buffer = myTypes[i].fileName.getBytes();
+ *              writeOut.writeInt(buffer.length);
+ *              writeOut.write(buffer);
+ *              writeOut.writeLong(myTypes[i].fileLength);
+ *              writeOut.writeLong(myTypes[i].lastModified);
+ *          }
+ *          byte[] buffer = out.toByteArray();
+ *          writeOut.close();
+ *
+ *          super.javaToNative(buffer, transferData);
+ *
+ *      } catch (IOException e) {
+ *      }
+ *  }
+ * }
+ * public Object nativeToJava(TransferData transferData){
+ *
+ *  if (isSupportedType(transferData)) {
+ *
+ *      byte[] buffer = (byte[])super.nativeToJava(transferData);
+ *      if (buffer is null) return null;
+ *
+ *      MyType[] myData = new MyType[0];
+ *      try {
+ *          ByteArrayInputStream in = new ByteArrayInputStream(buffer);
+ *          DataInputStream readIn = new DataInputStream(in);
+ *          while(readIn.available() > 20) {
+ *              MyType datum = new MyType();
+ *              int size = readIn.readInt();
+ *              byte[] name = new byte[size];
+ *              readIn.read(name);
+ *              datum.fileName = new String(name);
+ *              datum.fileLength = readIn.readLong();
+ *              datum.lastModified = readIn.readLong();
+ *              MyType[] newMyData = new MyType[myData.length + 1];
+ *              System.arraycopy(myData, 0, newMyData, 0, myData.length);
+ *              newMyData[myData.length] = datum;
+ *              myData = newMyData;
+ *          }
+ *          readIn.close();
+ *      } catch (IOException ex) {
+ *          return null;
+ *      }
+ *      return myData;
+ *  }
+ *
+ *  return null;
+ * }
+ * protected String[] getTypeNames(){
+ *  return new String[]{MYTYPENAME};
+ * }
+ * protected int[] getTypeIds(){
+ *  return new int[] {MYTYPEID};
+ * }
+ * }
+ * </code></pre>
+ *
+ * @see Transfer
+ */
+public abstract class ByteArrayTransfer : Transfer {
+
+public TransferData[] getSupportedTypes() {
+    int[] types = getTypeIds();
+    TransferData[] data = new TransferData[types.length];
+    for (int i = 0; i < types.length; i++) {
+        data[i] = new TransferData();
+        data[i].type = types[i];
+        data[i].formatetc = new FORMATETC();
+        data[i].formatetc.cfFormat = types[i];
+        data[i].formatetc.dwAspect = COM.DVASPECT_CONTENT;
+        data[i].formatetc.lindex = -1;
+        data[i].formatetc.tymed = COM.TYMED_HGLOBAL;
+    }
+    return data;
+}
+
+public bool isSupportedType(TransferData transferData){
+    if (transferData is null) return false;
+    int[] types = getTypeIds();
+    for (int i = 0; i < types.length; i++) {
+        FORMATETC* format = transferData.formatetc;
+        if (format.cfFormat is types[i] &&
+            (format.dwAspect & COM.DVASPECT_CONTENT) is COM.DVASPECT_CONTENT &&
+            (format.tymed & COM.TYMED_HGLOBAL) is COM.TYMED_HGLOBAL  )
+            return true;
+    }
+    return false;
+}
+
+/**
+ * This implementation of <code>javaToNative</code> converts a java
+ * <code>byte[]</code> to a platform specific representation.
+ * 
+ * @param object a java <code>byte[]</code> containing the data to be converted
+ * @param transferData an empty <code>TransferData</code> object that will
+ *      be filled in on return with the platform specific format of the data
+ * 
+ * @see Transfer#nativeToJava
+ */
+protected void javaToNative (Object object, TransferData transferData) {
+    if (!checkByteArray(object) || !isSupportedType(transferData)) {
+        DND.error(DND.ERROR_INVALID_DATA);
+    }
+    // Allocate the memory because the caller (DropTarget) has not handed it in
+    // The caller of this method must release the data when it is done with it.
+    byte[] data = (cast(ArrayWrapperByte)object).array;
+    int size = data.length;
+    auto newPtr = OS.GlobalAlloc(OS.GMEM_FIXED | OS.GMEM_ZEROINIT, size);
+    OS.MoveMemory(newPtr, data.ptr, size);
+    transferData.stgmedium = new STGMEDIUM();
+    transferData.stgmedium.tymed = COM.TYMED_HGLOBAL;
+    transferData.stgmedium.unionField = newPtr;
+    transferData.stgmedium.pUnkForRelease = null;
+    transferData.result = COM.S_OK;
+}
+
+/**
+ * This implementation of <code>nativeToJava</code> converts a platform specific
+ * representation of a byte array to a java <code>byte[]</code>.
+ *
+ * @param transferData the platform specific representation of the data to be converted
+ * @return a java <code>byte[]</code> containing the converted data if the conversion was
+ *      successful; otherwise null
+ *
+ * @see Transfer#javaToNative
+ */
+protected Object nativeToJava(TransferData transferData) {
+    if (!isSupportedType(transferData) || transferData.pIDataObject is null)  return null;
+
+    IDataObject data = transferData.pIDataObject;
+    data.AddRef();
+    FORMATETC* formatetc = transferData.formatetc;
+    STGMEDIUM* stgmedium = new STGMEDIUM();
+    stgmedium.tymed = COM.TYMED_HGLOBAL;
+    transferData.result = getData(data, formatetc, stgmedium);
+    data.Release();
+    if (transferData.result !is COM.S_OK) return null;
+    auto hMem = stgmedium.unionField;
+    int size = OS.GlobalSize(hMem);
+    byte[] buffer = new byte[size];
+    auto ptr = OS.GlobalLock(hMem);
+    OS.MoveMemory(buffer.ptr, ptr, size);
+    OS.GlobalUnlock(hMem);
+    OS.GlobalFree(hMem);
+    return new ArrayWrapperByte(buffer);
+}
+
+bool checkByteArray(Object object) {
+    return (object !is null && ( null !is cast(ArrayWrapperByte)object) && (cast(ArrayWrapperByte)object).array.length > 0);
+}
+}