initial commit, 4.5 stable

platform/windows/drop_target_windows.h

@@ -0,0 +1,68 @@
+/**************************************************************************/
+/*  drop_target_windows.h                                                 */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "display_server_windows.h"
+
+#include <shlobj.h>
+
+GODOT_GCC_WARNING_PUSH_AND_IGNORE("-Wnon-virtual-dtor") // Silence warning due to a COM API weirdness.
+
+// https://learn.microsoft.com/en-us/windows/win32/api/ole2/nf-ole2-dodragdrop#remarks
+class DropTargetWindows : public IDropTarget {
+	LONG ref_count;
+	DisplayServerWindows::WindowData *window_data = nullptr;
+	CLIPFORMAT cf_filedescriptor = 0;
+	CLIPFORMAT cf_filecontents = 0;
+	String tmp_path;
+
+	bool is_valid_filedescriptor();
+	HRESULT handle_hdrop_format(Vector<String> *p_files, IDataObject *pDataObj);
+	HRESULT handle_filedescriptor_format(Vector<String> *p_files, IDataObject *pDataObj);
+	HRESULT save_as_file(const String &p_out_dir, FILEDESCRIPTORW *p_file_desc, IDataObject *pDataObj, int p_file_idx);
+
+public:
+	DropTargetWindows(DisplayServerWindows::WindowData *p_window_data);
+	virtual ~DropTargetWindows() {}
+
+	// IUnknown
+	HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppvObject) override;
+	ULONG STDMETHODCALLTYPE AddRef() override;
+	ULONG STDMETHODCALLTYPE Release() override;
+
+	// IDropTarget
+	HRESULT STDMETHODCALLTYPE DragEnter(IDataObject *pDataObj, DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) override;
+	HRESULT STDMETHODCALLTYPE DragOver(DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) override;
+	HRESULT STDMETHODCALLTYPE DragLeave() override;
+	HRESULT STDMETHODCALLTYPE Drop(IDataObject *pDataObj, DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) override;
+};
+
+GODOT_GCC_WARNING_POP