/// <summary>
/// Handle the Cut operation to the clipboard
/// </summary>
protected internal override int CutToClipboard()
{
int returnValue = (int)OleConstants.OLECMDERR_E_NOTSUPPORTED;
try
{
this.RegisterClipboardNotifications(true);
// Create our data object and change the selection to show item(s) being cut
IOleDataObject dataObject = this.PackageSelectionDataObject(true);
if (dataObject != null)
{
this.SourceDraggedOrCutOrCopied = true;
// Add our cut item(s) to the clipboard
ErrorHandler.ThrowOnFailure(UnsafeNativeMethods.OleSetClipboard(dataObject));
// Inform VS (UiHierarchyWindow) of the cut
IVsUIHierWinClipboardHelper clipboardHelper = (IVsUIHierWinClipboardHelper)GetService(typeof(SVsUIHierWinClipboardHelper));
if (clipboardHelper == null)
{
return(VSConstants.E_FAIL);
}
returnValue = ErrorHandler.ThrowOnFailure(clipboardHelper.Cut(dataObject));
}
}
catch (COMException e)
{
Trace.WriteLine("Exception : " + e.Message);
returnValue = e.ErrorCode;
}
return(returnValue);
}
/// <summary>
/// Handle the Paste operation to a targetNode
/// </summary>
protected internal override int PasteFromClipboard(HierarchyNode targetNode)
{
int returnValue = (int)OleConstants.OLECMDERR_E_NOTSUPPORTED;
//Get the clipboardhelper service and use it after processing dataobject
IVsUIHierWinClipboardHelper clipboardHelper = (IVsUIHierWinClipboardHelper)GetService(typeof(SVsUIHierWinClipboardHelper));
if (clipboardHelper == null)
{
return(VSConstants.E_FAIL);
}
try
{
//Get dataobject from clipboard
IOleDataObject dataObject = null;
ErrorHandler.ThrowOnFailure(UnsafeNativeMethods.OleGetClipboard(out dataObject));
if (dataObject == null)
{
return(VSConstants.E_UNEXPECTED);
}
DropEffect dropEffect = DropEffect.None;
DropDataType dropDataType = DropDataType.None;
try
{
dropDataType = this.ProcessSelectionDataObject(dataObject, targetNode.GetDragTargetHandlerNode());
dropEffect = this.QueryDropEffect(dropDataType, 0);
}
catch (ExternalException e)
{
Trace.WriteLine("Exception : " + e.Message);
// If it is a drop from windows and we get any kind of error ignore it. This
// prevents bogus messages from the shell from being displayed
if (dropDataType != DropDataType.Shell)
{
throw e;
}
}
finally
{
// Inform VS (UiHierarchyWindow) of the paste
returnValue = clipboardHelper.Paste(dataObject, (uint)dropEffect);
}
}
catch (COMException e)
{
Trace.WriteLine("Exception : " + e.Message);
returnValue = e.ErrorCode;
}
return(returnValue);
}
/// <summary>
/// Register/Unregister for Clipboard events for the UiHierarchyWindow (solution explorer)
/// </summary>
/// <param name="register">true for register, false for unregister</param>
protected internal override void RegisterClipboardNotifications(bool register)
{
// Get the UiHierarchy window clipboard helper service
IVsUIHierWinClipboardHelper clipboardHelper = (IVsUIHierWinClipboardHelper)GetService(typeof(SVsUIHierWinClipboardHelper));
if (clipboardHelper == null)
{
return;
}
if (register && this.copyPasteCookie == 0)
{
// Register
ErrorHandler.ThrowOnFailure(clipboardHelper.AdviseClipboardHelperEvents(this, out this.copyPasteCookie));
Debug.Assert(this.copyPasteCookie != 0, "AdviseClipboardHelperEvents returned an invalid cookie");
}
else if (!register && this.copyPasteCookie != 0)
{
// Unregister
ErrorHandler.ThrowOnFailure(clipboardHelper.UnadviseClipboardHelperEvents(this.copyPasteCookie));
this.copyPasteCookie = 0;
}
}
