mirror of
https://github.com/AyuGram/AyuGramDesktop.git
synced 2026-08-06 11:52:58 +00:00
John Preston
91 lines
2.3 KiB
C++
91 lines
2.3 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "iv/editor/iv_editor_clipboard.h"
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#include "base/random.h"
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#include <QtCore/QMimeData>
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#include <QtCore/QPointer>
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namespace Iv::Editor {
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namespace {
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struct ClipboardStorage {
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uint64 sessionId = base::RandomValue<uint64>();
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uint64 serial = 0;
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QPointer<QMimeData> mimeData;
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std::optional<ClipboardData> data;
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};
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[[nodiscard]] ClipboardStorage &Storage() {
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static auto storage = ClipboardStorage();
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return storage;
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}
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[[nodiscard]] bool MarkerMatches(const QMimeData *mimeData) {
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return mimeData
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&& mimeData->hasFormat(ClipboardMimeType())
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&& (mimeData->data(ClipboardMimeType()) == "1");
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}
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[[nodiscard]] bool OriginMatches(
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const ClipboardOrigin &origin,
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const ClipboardStorage &storage) {
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return (origin.sessionId == storage.sessionId)
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&& (origin.serial == storage.serial)
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&& (origin.serial != 0);
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}
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[[nodiscard]] bool StoredDataMatches(
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const ClipboardData &data,
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const ClipboardStorage &storage) {
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return std::visit([&](const auto &payload) {
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return OriginMatches(payload.origin, storage);
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}, data);
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}
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[[nodiscard]] ClipboardData StampClipboardData(ClipboardData data) {
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auto &storage = Storage();
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const auto serial = ++storage.serial;
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return std::visit([&](auto payload) -> ClipboardData {
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payload.origin.sessionId = storage.sessionId;
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payload.origin.serial = serial;
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return ClipboardData(std::move(payload));
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}, std::move(data));
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}
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} // namespace
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QString ClipboardMimeType() {
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return u"application/x-td-iv-editor"_q;
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}
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std::unique_ptr<QMimeData> MimeDataFromClipboardData(ClipboardData data) {
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auto &storage = Storage();
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storage.data = StampClipboardData(std::move(data));
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auto result = std::make_unique<QMimeData>();
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result->setData(ClipboardMimeType(), "1");
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storage.mimeData = result.get();
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return result;
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}
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std::optional<ClipboardData> ClipboardDataFromMimeData(
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const QMimeData *mimeData) {
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const auto &storage = Storage();
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if (!MarkerMatches(mimeData)
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|| !storage.data
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|| !storage.mimeData
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|| (storage.mimeData.data() != mimeData)
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|| !StoredDataMatches(*storage.data, storage)) {
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return std::nullopt;
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}
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return storage.data;
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}
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} // namespace Iv::Editor
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