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-rw-r--r--widget/windows/nsNativeDragSource.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/widget/windows/nsNativeDragSource.h b/widget/windows/nsNativeDragSource.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef _nsNativeDragSource_h_
+#define _nsNativeDragSource_h_
+
+#include "nscore.h"
+#include "nsIDOMDataTransfer.h"
+#include "nsCOMPtr.h"
+#include <ole2.h>
+#include <oleidl.h>
+#include "mozilla/Attributes.h"
+
+//class nsIDragSource;
+
+/*
+ * nsNativeDragSource implements the IDropSource interface and gets
+ * most of its behavior from the associated adapter (m_dragDrop).
+ */
+class nsNativeDragSource final : public IDropSource
+{
+public:
+
+ // construct an nsNativeDragSource referencing adapter
+ // nsNativeDragSource(nsIDragSource * adapter);
+ nsNativeDragSource(nsIDOMDataTransfer* aDataTransfer);
+ ~nsNativeDragSource();
+
+ // IUnknown methods - see iunknown.h for documentation
+
+ STDMETHODIMP QueryInterface(REFIID, void**);
+ STDMETHODIMP_(ULONG) AddRef();
+ STDMETHODIMP_(ULONG) Release();
+
+ // IDropSource methods - see idropsrc.h for documentation
+
+ // Return DRAGDROP_S_USEDEFAULTCURSORS if this object lets OLE provide
+ // default cursors, otherwise return NOERROR. This method gets called in
+ // response to changes that the target makes to dEffect (DragEnter,
+ // DragOver).
+ STDMETHODIMP GiveFeedback(DWORD dEffect);
+
+ // This method gets called if there is any change in the mouse or key
+ // state. Return DRAGDROP_S_CANCEL to stop the drag, DRAGDROP_S_DROP
+ // to execute the drop, otherwise NOERROR.
+ STDMETHODIMP QueryContinueDrag(BOOL fESC, DWORD grfKeyState);
+
+ bool UserCancelled() { return mUserCancelled; }
+
+protected:
+ // Reference count
+ ULONG m_cRef;
+
+ // Data object, hold information about cursor state
+ nsCOMPtr<nsIDOMDataTransfer> mDataTransfer;
+
+ // Custom drag cursor
+ HCURSOR m_hCursor;
+
+ // true if the user cancelled the drag by pressing escape
+ bool mUserCancelled;
+};
+
+#endif // _nsNativeDragSource_h_
+