/// <summary>
/// Empties all the data structures added to the clipboard and flushes the clipboard.
/// </summary>
private void CleanAndFlushClipboard()
{
IOleDataObject oleDataObject = null;
ErrorHandler.ThrowOnFailure(UnsafeNativeMethods.OleGetClipboard(out oleDataObject));
if (oleDataObject == null)
{
return;
}
string sourceProjectPath = DragDropHelper.GetSourceProjectPath(oleDataObject);
if (!String.IsNullOrEmpty(sourceProjectPath) && NativeMethods.IsSamePath(sourceProjectPath, this.GetMkDocument()))
{
UnsafeNativeMethods.OleFlushClipboard();
int clipboardOpened = 0;
try
{
clipboardOpened = UnsafeNativeMethods.OpenClipboard(IntPtr.Zero);
UnsafeNativeMethods.EmptyClipboard();
}
finally
{
if (clipboardOpened == 1)
{
UnsafeNativeMethods.CloseClipboard();
}
}
}
}
/// <summary>
/// Process dataobject from Drag/Drop/Cut/Copy/Paste operation
/// </summary>
/// <remarks>The targetNode is set if the method is called from a drop operation, otherwise it is null</remarks>
///
internal DropDataType ProcessSelectionDataObject(IOleDataObject dataObject, HierarchyNode targetNode)
{
DropDataType dropDataType = DropDataType.None;
bool isWindowsFormat = false;
// Try to get it as a directory based project.
List <string> filesDropped = DragDropHelper.GetDroppedFiles(DragDropHelper.CF_VSSTGPROJECTITEMS, dataObject, out dropDataType);
if (filesDropped.Count == 0)
{
filesDropped = DragDropHelper.GetDroppedFiles(DragDropHelper.CF_VSREFPROJECTITEMS, dataObject, out dropDataType);
}
if (filesDropped.Count == 0)
{
filesDropped = DragDropHelper.GetDroppedFiles(NativeMethods.CF_HDROP, dataObject, out dropDataType);
isWindowsFormat = (filesDropped.Count > 0);
}
if (dropDataType != DropDataType.None && filesDropped.Count > 0)
{
string[] filesDroppedAsArray = filesDropped.ToArray();
string sourceProjectPath = DragDropHelper.GetSourceProjectPath(dataObject);
HierarchyNode node = (targetNode == null) ? this : targetNode;
// For directory based projects the content of the clipboard is a double-NULL terminated list of Projref strings.
if (isWindowsFormat)
{
// This is the code path when source is windows explorer
VSADDRESULT[] vsaddresults = new VSADDRESULT[1];
vsaddresults[0] = VSADDRESULT.ADDRESULT_Failure;
int addResult = AddItem(node.ID, VSADDITEMOPERATION.VSADDITEMOP_OPENFILE, null, (uint)filesDropped.Count, filesDropped.ToArray(), IntPtr.Zero, vsaddresults);
if (addResult != VSConstants.S_OK && addResult != VSConstants.S_FALSE && addResult != (int)OleConstants.OLECMDERR_E_CANCELED &&
vsaddresults[0] != VSADDRESULT.ADDRESULT_Success)
{
ErrorHandler.ThrowOnFailure(addResult);
}
return(dropDataType);
}
else
{
if (AddFilesFromProjectReferences(node, filesDroppedAsArray))
{
return(dropDataType);
}
}
}
// If we reached this point then the drop data must be set to None.
// Otherwise the OnPaste will be called with a valid DropData and that would actually delete the item.
return(DropDataType.None);
}
