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Telegram/SourceFiles/ui/chat/attach/attach_extensions.cpp

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "ui/chat/attach/attach_extensions.h"
+
+#include <QtCore/QMimeDatabase>
+#include <QtGui/QImageReader>
+
+namespace Ui {
+
+const QStringList &ImageExtensions() {
+	static const auto result = [] {
+		const auto formats = QImageReader::supportedImageFormats();
+		return formats | ranges::views::transform([](const auto &format) {
+			return '.' + format.toLower();
+		}) | ranges::views::filter([](const auto &format) {
+			const auto mimes = QMimeDatabase().mimeTypesForFileName(
+				u"test"_q + format);
+			return !mimes.isEmpty()
+				&& mimes.front().name().startsWith(u"image/"_q);
+		}) | ranges::to<QStringList>;
+	}();
+	return result;
+}
+
+} // namespace Ui