--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/dnd/Clipboard.d	Mon Mar 02 14:44:16 2009 +0100
@@ -0,0 +1,819 @@
+/*******************************************************************************
+ * 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.Clipboard;
+
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.SWTError;
+import org.eclipse.swt.SWTException;
+import org.eclipse.swt.internal.ole.win32.COM;
+import org.eclipse.swt.internal.ole.win32.OBJIDL;
+import org.eclipse.swt.internal.ole.win32.extras;
+import org.eclipse.swt.internal.win32.OS;
+import org.eclipse.swt.widgets.Display;
+
+import org.eclipse.swt.dnd.Transfer;
+import org.eclipse.swt.dnd.TransferData;
+import org.eclipse.swt.dnd.OleEnumFORMATETC;
+import org.eclipse.swt.dnd.DND;
+
+import java.lang.all;
+import tango.core.Thread;
+
+/**
+ * The <code>Clipboard</code> provides a mechanism for transferring data from one
+ * application to another or within an application.
+ *
+ * <p>IMPORTANT: This class is <em>not</em> intended to be subclassed.</p>
+ *
+ * @see <a href="http://www.eclipse.org/swt/snippets/#clipboard">Clipboard snippets</a>
+ * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ClipboardExample</a>
+ * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
+ */
+public class Clipboard {
+
+    private Display display;
+
+    // ole interfaces
+    private _IDataObjectImpl iDataObject;
+    private int refCount;
+    private Transfer[] transferAgents;
+    private Object[] data;
+    private int CFSTR_PREFERREDDROPEFFECT;
+
+/**
+ * Constructs a new instance of this class.  Creating an instance of a Clipboard
+ * may cause system resources to be allocated depending on the platform.  It is therefore
+ * mandatory that the Clipboard instance be disposed when no longer required.
+ *
+ * @param display the display on which to allocate the clipboard
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
+ *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
+ * </ul>
+ *
+ * @see Clipboard#dispose
+ * @see Clipboard#checkSubclass
+ */
+public this(Display display) {
+    checkSubclass ();
+    if (display is null) {
+        display = Display.getCurrent();
+        if (display is null) {
+            display = Display.getDefault();
+        }
+    }
+    if (display.getThread() !is Thread.getThis()) {
+        DND.error(SWT.ERROR_THREAD_INVALID_ACCESS);
+    }
+    this.display = display;
+    TCHAR* chFormatName = StrToTCHARz(0, "Preferred DropEffect"); //$NON-NLS-1$
+    CFSTR_PREFERREDDROPEFFECT = OS.RegisterClipboardFormat(chFormatName);
+    createCOMInterfaces();
+    this.AddRef();
+}
+
+/**
+ * Checks that this class can be subclassed.
+ * <p>
+ * The SWT class library is intended to be subclassed
+ * only at specific, controlled points. This method enforces this
+ * rule unless it is overridden.
+ * </p><p>
+ * <em>IMPORTANT:</em> By providing an implementation of this
+ * method that allows a subclass of a class which does not
+ * normally allow subclassing to be created, the implementer
+ * agrees to be fully responsible for the fact that any such
+ * subclass will likely fail between SWT releases and will be
+ * strongly platform specific. No support is provided for
+ * user-written classes which are implemented in this fashion.
+ * </p><p>
+ * The ability to subclass outside of the allowed SWT classes
+ * is intended purely to enable those not on the SWT development
+ * team to implement patches in order to get around specific
+ * limitations in advance of when those limitations can be
+ * addressed by the team. Subclassing should not be attempted
+ * without an intimate and detailed understanding of the hierarchy.
+ * </p>
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
+ * </ul>
+ */
+protected void checkSubclass () {
+    String name = this.classinfo.name;
+    String validName = Clipboard.classinfo.name;
+    if (validName!=/*eq*/name) {
+        DND.error (SWT.ERROR_INVALID_SUBCLASS);
+    }
+}
+
+/**
+ * Throws an <code>SWTException</code> if the receiver can not
+ * be accessed by the caller. This may include both checks on
+ * the state of the receiver and more generally on the entire
+ * execution context. This method <em>should</em> be called by
+ * widget implementors to enforce the standard SWT invariants.
+ * <p>
+ * Currently, it is an error to invoke any method (other than
+ * <code>isDisposed()</code>) on a widget that has had its
+ * <code>dispose()</code> method called. It is also an error
+ * to call widget methods from any thread that is different
+ * from the thread that created the widget.
+ * </p><p>
+ * In future releases of SWT, there may be more or fewer error
+ * checks and exceptions may be thrown for different reasons.
+ * </p>
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+protected void checkWidget () {
+    Display display = this.display;
+    if (display is null) DND.error (SWT.ERROR_WIDGET_DISPOSED);
+    if (display.getThread() !is Thread.getThis ()) DND.error (SWT.ERROR_THREAD_INVALID_ACCESS);
+    if (display.isDisposed()) DND.error(SWT.ERROR_WIDGET_DISPOSED);
+}
+
+/**
+ * If this clipboard is currently the owner of the data on the system clipboard,
+ * clear the contents.  If this clipboard is not the owner, then nothing is done.
+ * Note that there are clipboard assistant applications that take ownership of
+ * data or make copies of data when it is placed on the clipboard.  In these
+ * cases, it may not be possible to clear the clipboard.
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public void clearContents() {
+    clearContents(DND.CLIPBOARD);
+}
+
+/**
+ * If this clipboard is currently the owner of the data on the specified
+ * clipboard, clear the contents.  If this clipboard is not the owner, then
+ * nothing is done.
+ *
+ * <p>Note that there are clipboard assistant applications that take ownership
+ * of data or make copies of data when it is placed on the clipboard.  In these
+ * cases, it may not be possible to clear the clipboard.</p>
+ *
+ * <p>The clipboards value is either one of the clipboard constants defined in
+ * class <code>DND</code>, or must be built by <em>bitwise OR</em>'ing together
+ * (that is, using the <code>int</code> "|" operator) two or more
+ * of those <code>DND</code> clipboard constants.</p>
+ *
+ * @param clipboards to be cleared
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see DND#CLIPBOARD
+ * @see DND#SELECTION_CLIPBOARD
+ *
+ * @since 3.1
+ */
+public void clearContents(int clipboards) {
+    checkWidget();
+    if ((clipboards & DND.CLIPBOARD) !is 0) {
+        /* OleIsCurrentClipboard([in] pDataObject)
+         * The argument pDataObject is owned by the caller so reference count does not
+         * need to be incremented.
+         */
+        if (COM.OleIsCurrentClipboard(this.iDataObject) is COM.S_OK) {
+            /* OleSetClipboard([in] pDataObject)
+             * The argument pDataObject is owned by the caller so reference count does not
+             * need to be incremented.
+             */
+            COM.OleSetClipboard(null);
+        }
+    }
+}
+
+/**
+ * Disposes of the operating system resources associated with the clipboard.
+ * The data will still be available on the system clipboard after the dispose
+ * method is called.
+ *
+ * <p>NOTE: On some platforms the data will not be available once the application
+ * has exited or the display has been disposed.</p>
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
+ * </ul>
+ */
+public void dispose () {
+    if (isDisposed()) return;
+    if (display.getThread() !is Thread.getThis ()) DND.error(SWT.ERROR_THREAD_INVALID_ACCESS);
+    /* OleIsCurrentClipboard([in] pDataObject)
+     * The argument pDataObject is owned by the caller so reference count does not
+     * need to be incremented.
+     */
+    if (COM.OleIsCurrentClipboard(this.iDataObject) is COM.S_OK) {
+        COM.OleFlushClipboard();
+    }
+    this.Release();
+    display = null;
+}
+
+/**
+ * Retrieve the data of the specified type currently available on the system
+ * clipboard.  Refer to the specific subclass of <code>Transfer</code> to
+ * determine the type of object returned.
+ *
+ * <p>The following snippet shows text and RTF text being retrieved from the
+ * clipboard:</p>
+ *
+ *    <code><pre>
+ *    Clipboard clipboard = new Clipboard(display);
+ *    TextTransfer textTransfer = TextTransfer.getInstance();
+ *    String textData = (String)clipboard.getContents(textTransfer);
+ *    if (textData !is null) System.out.println("Text is "+textData);
+ *    RTFTransfer rtfTransfer = RTFTransfer.getInstance();
+ *    String rtfData = (String)clipboard.getContents(rtfTransfer);
+ *    if (rtfData !is null) System.out.println("RTF Text is "+rtfData);
+ *    clipboard.dispose();
+ *    </code></pre>
+ *
+ * @param transfer the transfer agent for the type of data being requested
+ * @return the data obtained from the clipboard or null if no data of this type is available
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if transfer is null</li>
+ * </ul>
+ *
+ * @see Transfer
+ */
+public Object getContents(Transfer transfer) {
+    return getContents(transfer, DND.CLIPBOARD);
+}
+/**
+ * Retrieve the data of the specified type currently available on the specified
+ * clipboard.  Refer to the specific subclass of <code>Transfer</code> to
+ * determine the type of object returned.
+ *
+ * <p>The following snippet shows text and RTF text being retrieved from the
+ * clipboard:</p>
+ *
+ *    <code><pre>
+ *    Clipboard clipboard = new Clipboard(display);
+ *    TextTransfer textTransfer = TextTransfer.getInstance();
+ *    String textData = (String)clipboard.getContents(textTransfer);
+ *    if (textData !is null) System.out.println("Text is "+textData);
+ *    RTFTransfer rtfTransfer = RTFTransfer.getInstance();
+ *    String rtfData = (String)clipboard.getContents(rtfTransfer, DND.CLIPBOARD);
+ *    if (rtfData !is null) System.out.println("RTF Text is "+rtfData);
+ *    clipboard.dispose();
+ *    </code></pre>
+ *
+ * <p>The clipboards value is either one of the clipboard constants defined in
+ * class <code>DND</code>, or must be built by <em>bitwise OR</em>'ing together
+ * (that is, using the <code>int</code> "|" operator) two or more
+ * of those <code>DND</code> clipboard constants.</p>
+ *
+ * @param transfer the transfer agent for the type of data being requested
+ * @param clipboards on which to look for data
+ *
+ * @return the data obtained from the clipboard or null if no data of this type is available
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if transfer is null</li>
+ * </ul>
+ *
+ * @see Transfer
+ * @see DND#CLIPBOARD
+ * @see DND#SELECTION_CLIPBOARD
+ *
+ * @since 3.1
+ */
+public Object getContents(Transfer transfer, int clipboards) {
+    checkWidget();
+    if (transfer is null) DND.error(SWT.ERROR_NULL_ARGUMENT);
+    if ((clipboards & DND.CLIPBOARD) is 0) return null;
+    /*
+    * Bug in Windows. When a new application takes control
+    * of the clipboard, other applications may open the
+    * clipboard to determine if they want to record the
+    * clipboard updates.  When this happens, the clipboard
+    * can not be accessed until the other application is
+    * finished.  To allow the other applications to release
+    * the clipboard, use PeekMessage() to enable cross thread
+    * message sends.
+    */
+    IDataObject dataObject;
+    int retryCount = 0;
+    /* OleGetClipboard([out] ppDataObject).
+     * AddRef has already been called on ppDataObject by the callee and must be released by the caller.
+     */
+    int result = COM.OleGetClipboard(&dataObject);
+    while (result !is COM.S_OK && retryCount++ < 10) {
+        try {Thread.sleep(0.050);} catch (Exception t) {}
+        MSG msg;
+        OS.PeekMessage(&msg, null, 0, 0, OS.PM_NOREMOVE | OS.PM_NOYIELD);
+        result = COM.OleGetClipboard(&dataObject);
+    }
+    if (result !is COM.S_OK) return null;
+    try {
+        TransferData[] allowed = transfer.getSupportedTypes();
+        for (int i = 0; i < allowed.length; i++) {
+            if (dataObject.QueryGetData(allowed[i].formatetc) is COM.S_OK) {
+                TransferData data = allowed[i];
+                data.pIDataObject = dataObject;
+                return transfer.nativeToJava(data);
+            }
+        }
+    } finally {
+        dataObject.Release();
+    }
+    return null; // No data available for this transfer
+}
+/**
+ * Returns <code>true</code> if the clipboard has been disposed,
+ * and <code>false</code> otherwise.
+ * <p>
+ * This method gets the dispose state for the clipboard.
+ * When a clipboard has been disposed, it is an error to
+ * invoke any other method using the clipboard.
+ * </p>
+ *
+ * @return <code>true</code> when the widget is disposed and <code>false</code> otherwise
+ *
+ * @since 3.0
+ */
+public bool isDisposed () {
+    return (display is null);
+}
+
+/**
+ * Place data of the specified type on the system clipboard.  More than one type
+ * of data can be placed on the system clipboard at the same time.  Setting the
+ * data clears any previous data from the system clipboard, regardless of type.
+ *
+ * <p>NOTE: On some platforms, the data is immediately copied to the system
+ * clipboard but on other platforms it is provided upon request.  As a result,
+ * if the application modifies the data object it has set on the clipboard, that
+ * modification may or may not be available when the data is subsequently
+ * requested.</p>
+ *
+ * <p>The following snippet shows text and RTF text being set on the copy/paste
+ * clipboard:
+ * </p>
+ *
+ * <code><pre>
+ *  Clipboard clipboard = new Clipboard(display);
+ *  String textData = "Hello World";
+ *  String rtfData = "{\\rtf1\\b\\i Hello World}";
+ *  TextTransfer textTransfer = TextTransfer.getInstance();
+ *  RTFTransfer rtfTransfer = RTFTransfer.getInstance();
+ *  Transfer[] transfers = new Transfer[]{textTransfer, rtfTransfer};
+ *  Object[] data = new Object[]{textData, rtfData};
+ *  clipboard.setContents(data, transfers);
+ *  clipboard.dispose();
+ * </code></pre>
+ *
+ * @param data the data to be set in the clipboard
+ * @param dataTypes the transfer agents that will convert the data to its
+ * platform specific format; each entry in the data array must have a
+ * corresponding dataType
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if data is null or datatypes is null
+ *          or the length of data is not the same as the length of dataTypes</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *  @exception SWTError <ul>
+ *    <li>ERROR_CANNOT_SET_CLIPBOARD - if the clipboard is locked or otherwise unavailable</li>
+ * </ul>
+ *
+ * <p>NOTE: ERROR_CANNOT_SET_CLIPBOARD should be an SWTException, since it is a
+ * recoverable error, but can not be changed due to backward compatibility.</p>
+ */
+public void setContents(Object[] data, Transfer[] dataTypes) {
+    setContents(data, dataTypes, DND.CLIPBOARD);
+}
+
+/**
+ * Place data of the specified type on the specified clipboard.  More than one
+ * type of data can be placed on the specified clipboard at the same time.
+ * Setting the data clears any previous data from the specified
+ * clipboard, regardless of type.
+ *
+ * <p>NOTE: On some platforms, the data is immediately copied to the specified
+ * clipboard but on other platforms it is provided upon request.  As a result,
+ * if the application modifies the data object it has set on the clipboard, that
+ * modification may or may not be available when the data is subsequently
+ * requested.</p>
+ *
+ * <p>The clipboards value is either one of the clipboard constants defined in
+ * class <code>DND</code>, or must be built by <em>bitwise OR</em>'ing together
+ * (that is, using the <code>int</code> "|" operator) two or more
+ * of those <code>DND</code> clipboard constants.</p>
+ *
+ * <p>The following snippet shows text and RTF text being set on the copy/paste
+ * clipboard:
+ * </p>
+ *
+ * <code><pre>
+ *  Clipboard clipboard = new Clipboard(display);
+ *  String textData = "Hello World";
+ *  String rtfData = "{\\rtf1\\b\\i Hello World}";
+ *  TextTransfer textTransfer = TextTransfer.getInstance();
+ *  RTFTransfer rtfTransfer = RTFTransfer.getInstance();
+ *  Transfer[] transfers = new Transfer[]{textTransfer, rtfTransfer};
+ *  Object[] data = new Object[]{textData, rtfData};
+ *  clipboard.setContents(data, transfers, DND.CLIPBOARD);
+ *  clipboard.dispose();
+ * </code></pre>
+ *
+ * @param data the data to be set in the clipboard
+ * @param dataTypes the transfer agents that will convert the data to its
+ * platform specific format; each entry in the data array must have a
+ * corresponding dataType
+ * @param clipboards on which to set the data
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if data is null or datatypes is null
+ *          or the length of data is not the same as the length of dataTypes</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *  @exception SWTError <ul>
+ *    <li>ERROR_CANNOT_SET_CLIPBOARD - if the clipboard is locked or otherwise unavailable</li>
+ * </ul>
+ *
+ * <p>NOTE: ERROR_CANNOT_SET_CLIPBOARD should be an SWTException, since it is a
+ * recoverable error, but can not be changed due to backward compatibility.</p>
+ *
+ * @see DND#CLIPBOARD
+ * @see DND#SELECTION_CLIPBOARD
+ *
+ * @since 3.1
+ */
+public void setContents(Object[] data, Transfer[] dataTypes, int clipboards) {
+    checkWidget();
+    if (data is null || dataTypes is null || data.length !is dataTypes.length || data.length is 0) {
+        DND.error(SWT.ERROR_INVALID_ARGUMENT);
+    }
+    for (int i = 0; i < data.length; i++) {
+        if (data[i] is null || dataTypes[i] is null || !dataTypes[i].validate(data[i])) {
+            DND.error(SWT.ERROR_INVALID_ARGUMENT);
+        }
+    }
+    if ((clipboards & DND.CLIPBOARD) is 0) return;
+    this.data = data;
+    this.transferAgents = dataTypes;
+    /* OleSetClipboard([in] pDataObject)
+     * The argument pDataObject is owned by the caller so the reference count does not
+     * need to be incremented.
+     */
+    int result = COM.OleSetClipboard(iDataObject);
+
+    /*
+    * Bug in Windows. When a new application takes control
+    * of the clipboard, other applications may open the
+    * clipboard to determine if they want to record the
+    * clipboard updates.  When this happens, the clipboard
+    * can not be flushed until the other application is
+    * finished.  To allow other applications to get the
+    * data, use PeekMessage() to enable cross thread
+    * message sends.
+    */
+    int retryCount = 0;
+    while (result !is COM.S_OK && retryCount++ < 10) {
+        try {Thread.sleep(0.050);} catch (Exception t) {}
+        MSG msg;
+        OS.PeekMessage(&msg, null, 0, 0, OS.PM_NOREMOVE | OS.PM_NOYIELD);
+        result = COM.OleSetClipboard(iDataObject);
+    }
+    if (result !is COM.S_OK) {
+        DND.error(DND.ERROR_CANNOT_SET_CLIPBOARD);
+    }
+}
+private int AddRef() {
+    refCount++;
+    return refCount;
+}
+private void createCOMInterfaces() {
+    // register each of the interfaces that this object implements
+    iDataObject = new _IDataObjectImpl( this );
+}
+private void disposeCOMInterfaces() {
+    iDataObject = null;
+}
+/*
+ * EnumFormatEtc([in] dwDirection, [out] ppenumFormatetc)
+ * Ownership of ppenumFormatetc transfers from callee to caller so reference count on ppenumFormatetc
+ * must be incremented before returning.  Caller is responsible for releasing ppenumFormatetc.
+ */
+LRESULT EnumFormatEtc(int dwDirection, IEnumFORMATETC* ppenumFormatetc) {
+    // only allow getting of data - SetData is not currently supported
+    if (dwDirection is COM.DATADIR_SET) return COM.E_NOTIMPL;
+    // what types have been registered?
+    TransferData[] allowedDataTypes = new TransferData[0];
+    for (int i = 0; i < transferAgents.length; i++){
+        TransferData[] formats = transferAgents[i].getSupportedTypes();
+        TransferData[] newAllowedDataTypes = new TransferData[allowedDataTypes.length + formats.length];
+        System.arraycopy(allowedDataTypes, 0, newAllowedDataTypes, 0, allowedDataTypes.length);
+        System.arraycopy(formats, 0, newAllowedDataTypes, allowedDataTypes.length, formats.length);
+        allowedDataTypes = newAllowedDataTypes;
+    }
+    OleEnumFORMATETC enumFORMATETC = new OleEnumFORMATETC();
+    enumFORMATETC.AddRef();
+    FORMATETC*[] formats = new FORMATETC*[allowedDataTypes.length + 1];
+    for (int i = 0; i < allowedDataTypes.length; i++){
+        formats[i] = allowedDataTypes[i].formatetc;
+    }
+    // include the drop effect format to specify a copy operation
+    FORMATETC* dropeffect = new FORMATETC();
+    dropeffect.cfFormat = CFSTR_PREFERREDDROPEFFECT;
+    dropeffect.dwAspect = COM.DVASPECT_CONTENT;
+    dropeffect.lindex = -1;
+    dropeffect.tymed = COM.TYMED_HGLOBAL;
+    formats[formats.length -1] = dropeffect;
+    enumFORMATETC.setFormats(formats);
+
+    // TODO: <shawn liu> do we need AddRef() here
+    *ppenumFormatetc = enumFORMATETC.getAddress();
+    return COM.S_OK;
+}
+
+private IDataObject getAddress(){
+    return iDataObject;
+}
+
+LRESULT GetData(FORMATETC *pFormatetc, STGMEDIUM *pmedium) {
+    /* Called by a data consumer to obtain data from a source data object.
+       The GetData method renders the data described in the specified FORMATETC
+       structure and transfers it through the specified STGMEDIUM structure.
+       The caller then assumes responsibility for releasing the STGMEDIUM structure.
+    */
+    if (pFormatetc is null || pmedium is null) return COM.E_INVALIDARG;
+    if (QueryGetData(pFormatetc) !is COM.S_OK) return COM.DV_E_FORMATETC;
+
+    TransferData transferData = new TransferData();
+    transferData.formatetc = new FORMATETC();
+    COM.MoveMemory(transferData.formatetc, pFormatetc, FORMATETC.sizeof);
+    transferData.type = transferData.formatetc.cfFormat;
+    transferData.stgmedium = new STGMEDIUM();
+    transferData.result = COM.E_FAIL;
+
+    if (transferData.type is CFSTR_PREFERREDDROPEFFECT) {
+        // specify that a copy operation is to be performed
+        STGMEDIUM* stgmedium = new STGMEDIUM();
+        stgmedium.tymed = COM.TYMED_HGLOBAL;
+        stgmedium.unionField = OS.GlobalAlloc(COM.GMEM_FIXED | COM.GMEM_ZEROINIT, 4);
+        //TODO - should call GlobalLock
+        stgmedium.unionField = cast(void*)COM.DROPEFFECT_COPY;
+        stgmedium.pUnkForRelease = null;
+        COM.MoveMemory(pmedium, stgmedium, STGMEDIUM.sizeof);
+        return COM.S_OK;
+    }
+
+    // get matching transfer agent to perform conversion
+    int transferIndex = -1;
+    for (int i = 0; i < transferAgents.length; i++){
+        if (transferAgents[i].isSupportedType(transferData)){
+            transferIndex = i;
+            break;
+        }
+    }
+    if (transferIndex is -1) return COM.DV_E_FORMATETC;
+    transferAgents[transferIndex].javaToNative(data[transferIndex], transferData);
+    COM.MoveMemory(pmedium, transferData.stgmedium, STGMEDIUM.sizeof);
+    return transferData.result;
+}
+
+LRESULT QueryGetData(FORMATETC * pFormatetc) {
+    if (transferAgents is null) return COM.E_FAIL;
+    TransferData transferData = new TransferData();
+    transferData.formatetc = new FORMATETC();
+    COM.MoveMemory(transferData.formatetc, pFormatetc, FORMATETC.sizeof);
+    transferData.type = transferData.formatetc.cfFormat;
+    if (transferData.type is CFSTR_PREFERREDDROPEFFECT) return COM.S_OK;
+    // is this type supported by the transfer agent?
+    for (int i = 0; i < transferAgents.length; i++){
+        if (transferAgents[i].isSupportedType(transferData))
+            return COM.S_OK;
+    }
+
+    return COM.DV_E_FORMATETC;
+}
+/* QueryInterface([in] iid, [out] ppvObject)
+ * Ownership of ppvObject transfers from callee to caller so reference count on ppvObject
+ * must be incremented before returning.  Caller is responsible for releasing ppvObject.
+ */
+HRESULT QueryInterface(GUID* riid, void ** ppvObject) {
+    if (riid is null || ppvObject is null) return COM.E_INVALIDARG;
+    if (COM.IsEqualGUID(riid, &COM.IIDIUnknown) || COM.IsEqualGUID(riid, &COM.IIDIDataObject) ) {
+        *ppvObject = cast(void*)cast(IUnknown)iDataObject;
+        AddRef();
+        return COM.S_OK;
+    }
+    *ppvObject = null;
+    return COM.E_NOINTERFACE;
+}
+private ULONG Release() {
+    refCount--;
+    if (refCount is 0) {
+        this.data = null;
+        this.transferAgents = null;
+        disposeCOMInterfaces();
+        COM.CoFreeUnusedLibraries();
+    }
+    return refCount;
+}
+
+/**
+ * Returns an array of the data types currently available on the system
+ * clipboard. Use with Transfer.isSupportedType.
+ *
+ * @return array of data types currently available on the system clipboard
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see Transfer#isSupportedType
+ *
+ * @since 3.0
+ */
+public TransferData[] getAvailableTypes() {
+    return getAvailableTypes(DND.CLIPBOARD);
+}
+
+/**
+ * Returns an array of the data types currently available on the specified
+ * clipboard. Use with Transfer.isSupportedType.
+ *
+ * <p>The clipboards value is either one of the clipboard constants defined in
+ * class <code>DND</code>, or must be built by <em>bitwise OR</em>'ing together
+ * (that is, using the <code>int</code> "|" operator) two or more
+ * of those <code>DND</code> clipboard constants.</p>
+ *
+ * @param clipboards from which to get the data types
+ * @return array of data types currently available on the specified clipboard
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see Transfer#isSupportedType
+ * @see DND#CLIPBOARD
+ * @see DND#SELECTION_CLIPBOARD
+ *
+ * @since 3.1
+ */
+public TransferData[] getAvailableTypes(int clipboards) {
+    checkWidget();
+    if ((clipboards & DND.CLIPBOARD) is 0) return null;
+    FORMATETC*[] types = _getAvailableTypes();
+    TransferData[] data = new TransferData[types.length];
+    for (int i = 0; i < types.length; i++) {
+        data[i] = new TransferData();
+        data[i].type = types[i].cfFormat;
+        data[i].formatetc = types[i];
+    }
+    return data;
+}
+
+/**
+ * Returns a platform specific list of the data types currently available on the
+ * system clipboard.
+ *
+ * <p>Note: <code>getAvailableTypeNames</code> is a utility for writing a Transfer
+ * sub-class.  It should NOT be used within an application because it provides
+ * platform specific information.</p>
+ *
+ * @return a platform specific list of the data types currently available on the
+ * system clipboard
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public String[] getAvailableTypeNames() {
+    checkWidget();
+    FORMATETC*[] types = _getAvailableTypes();
+    String[] names = new String[](types.length);
+    int maxSize = 128;
+    for (int i = 0; i < types.length; i++){
+        TCHAR[] buffer = NewTCHARs(0, maxSize);
+        int size = OS.GetClipboardFormatName(types[i].cfFormat, buffer.ptr, maxSize);
+        if (size !is 0) {
+            names[i] = TCHARzToStr(buffer.ptr)[0..size];
+        } else {
+            switch (types[i].cfFormat) {
+                case COM.CF_HDROP: names[i] = "CF_HDROP"; break; //$NON-NLS-1$
+                case COM.CF_TEXT: names[i] = "CF_TEXT"; break; //$NON-NLS-1$
+                case COM.CF_BITMAP: names[i] = "CF_BITMAP"; break; //$NON-NLS-1$
+                case COM.CF_METAFILEPICT: names[i] = "CF_METAFILEPICT"; break; //$NON-NLS-1$
+                case COM.CF_SYLK: names[i] = "CF_SYLK"; break; //$NON-NLS-1$
+                case COM.CF_DIF: names[i] = "CF_DIF"; break; //$NON-NLS-1$
+                case COM.CF_TIFF: names[i] = "CF_TIFF"; break; //$NON-NLS-1$
+                case COM.CF_OEMTEXT: names[i] = "CF_OEMTEXT"; break; //$NON-NLS-1$
+                case COM.CF_DIB: names[i] = "CF_DIB"; break; //$NON-NLS-1$
+                case COM.CF_PALETTE: names[i] = "CF_PALETTE"; break; //$NON-NLS-1$
+                case COM.CF_PENDATA: names[i] = "CF_PENDATA"; break; //$NON-NLS-1$
+                case COM.CF_RIFF: names[i] = "CF_RIFF"; break; //$NON-NLS-1$
+                case COM.CF_WAVE: names[i] = "CF_WAVE"; break; //$NON-NLS-1$
+                case COM.CF_UNICODETEXT: names[i] = "CF_UNICODETEXT"; break; //$NON-NLS-1$
+                case COM.CF_ENHMETAFILE: names[i] = "CF_ENHMETAFILE"; break; //$NON-NLS-1$
+                case COM.CF_LOCALE: names[i] = "CF_LOCALE"; break; //$NON-NLS-1$
+                case COM.CF_MAX: names[i] = "CF_MAX"; break; //$NON-NLS-1$
+                default: names[i] = "UNKNOWN"; //$NON-NLS-1$
+            }
+        }
+    }
+    return names;
+}
+
+private FORMATETC*[] _getAvailableTypes() {
+    FORMATETC*[] types = null;
+    IDataObject dataObject;
+    /* OleGetClipboard([out] ppDataObject).
+     * AddRef has already been called on ppDataObject by the callee and must be released by the caller.
+     */
+    if (COM.OleGetClipboard(&dataObject) !is COM.S_OK) return types;
+    IEnumFORMATETC enumFormatetc;
+    /* EnumFormatEtc([in] dwDirection, [out] ppenumFormatetc)
+     * AddRef has already been called on ppenumFormatetc by the callee and must be released by the caller.
+     */
+    int rc = dataObject.EnumFormatEtc(COM.DATADIR_GET, &enumFormatetc);
+    dataObject.Release();
+    if (rc !is COM.S_OK)return types;
+    // Loop over enumerator and save any types that match what we are looking for
+    //int /*long*/ rgelt = OS.GlobalAlloc(OS.GMEM_FIXED | OS.GMEM_ZEROINIT, FORMATETC.sizeof);
+    uint[1] pceltFetched;
+    FORMATETC rgelt;
+    enumFormatetc.Reset();
+    while (enumFormatetc.Next(1, &rgelt, pceltFetched.ptr) is COM.S_OK && pceltFetched[0] is 1) {
+        FORMATETC* formatetc = new FORMATETC();
+        COM.MoveMemory(formatetc, &rgelt, FORMATETC.sizeof);
+        FORMATETC*[] newTypes = new FORMATETC*[types.length + 1];
+        SimpleType!(FORMATETC*).arraycopy(types, 0, newTypes, 0, types.length);
+        newTypes[types.length] = formatetc;
+        types = newTypes;
+    }
+    //OS.GlobalFree(rgelt);
+    enumFormatetc.Release();
+    return types;
+}
+}
+
+private class _IDataObjectImpl : IDataObject {
+
+    Clipboard   parent;
+    this(Clipboard  p) { parent = p; }
+extern (Windows):
+    // interface of IUnknown
+    HRESULT QueryInterface(GUID* riid, void ** ppvObject) { return parent.QueryInterface(riid, ppvObject); }
+    ULONG AddRef()  { return parent.AddRef(); }
+    ULONG Release() { return parent.Release(); }
+
+    // interface IDataObject
+    LRESULT GetData( FORMATETC *pFormatetc, STGMEDIUM *pmedium) { return parent.GetData(pFormatetc, pmedium); }
+    LRESULT GetDataHere(FORMATETC * pFormatetc, STGMEDIUM * pmedium) { return COM.E_NOTIMPL; }
+    LRESULT QueryGetData(FORMATETC* pFormatetc) { return parent.QueryGetData(pFormatetc); }
+    LRESULT GetCanonicalFormatEtc(FORMATETC* pFormatetcIn, FORMATETC* pFormatetcOut) { return COM.E_NOTIMPL; }
+    LRESULT SetData(FORMATETC* pFormatetc, STGMEDIUM * pmedium, BOOL fRelease) { return COM.E_NOTIMPL; }
+    LRESULT EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC * ppenumFormatetc) { return parent.EnumFormatEtc(dwDirection, ppenumFormatetc); }
+    LRESULT DAdvise(FORMATETC* pFormatetc, DWORD advf, IAdviseSink pAdvSink, DWORD* pdwConnection) { return COM.E_NOTIMPL; }
+    LRESULT DUnadvise(DWORD dwConnection) { return COM.E_NOTIMPL; }
+    LRESULT EnumDAdvise(IEnumSTATDATA * ppenumAdvise) { return COM.E_NOTIMPL; }
+}
+