tip/ui/winui/dnd.cpp

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2023 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "pch.h"

#include "dnd.h"
#include "util.h"

#include <thread>

using namespace winrt;
using namespace Windows::ApplicationModel::DataTransfer;
using namespace Windows::Storage;
using namespace Windows::Storage::Streams;

UIEXPORT void ui_selection_settext(UiDnD* dnd, char* str, int len) {
	if (dnd->data) {
		if (len < 0) {
			len = strlen(str);
		}
		wchar_t *wstr = str2wstr_len(str, len, nullptr);

		dnd->data.SetText(wstr);

		free(wstr);

	}
}

UIEXPORT void ui_selection_seturis(UiDnD* dnd, char** uris, int nelm) {

}


UIEXPORT char* ui_selection_gettext(UiDnD* dnd) {
	return nullptr;
}


UIEXPORT UiFileList ui_selection_geturis(UiDnD *dnd) {
	UiFileList flist;
	flist.files = nullptr;
	flist.nfiles = 0;

    if (dnd->dataview.Contains(StandardDataFormats::StorageItems())) {
		UiFileList *flist_ptr = &flist;

		// we need to execute this in a different thread
		// this could block the main gui thread, but shouldn't happen with a simple uri list
		std::thread getDataThread([dnd, flist_ptr]() {
				auto items = dnd->dataview.GetStorageItemsAsync().get();

				char **uris = (char**)calloc(items.Size(), sizeof(char*));
				flist_ptr->files = uris;
				flist_ptr->nfiles = items.Size();

				int i = 0;
				for (IStorageItem const& item : items) {
					winrt::hstring path = item.Path();
					uris[i++] = wchar2utf8(path.c_str(), path.size());
				}
			});
		getDataThread.join();
    }
	return flist;
}