170 lines
3.8 KiB
C++
170 lines
3.8 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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#pragma once
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#include "base/observer.h"
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#include "base/timer.h"
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#include "base/binary_guard.h"
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#include <QtNetwork/QNetworkReply>
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namespace Data {
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struct FileOrigin;
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} // namespace Data
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namespace Main {
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class Session;
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} // namespace Main
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namespace Storage {
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namespace Cache {
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struct Key;
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} // namespace Cache
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// 10 MB max file could be hold in memory
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// This value is used in local cache database settings!
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constexpr auto kMaxFileInMemory = 10 * 1024 * 1024;
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// 2 MB audio is hold in memory and auto loaded
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constexpr auto kMaxVoiceInMemory = 2 * 1024 * 1024;
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// 2 MB stickers hold in memory, auto loaded and displayed inline
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constexpr auto kMaxStickerInMemory = 2 * 1024 * 1024;
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// 10 MB GIF and mp4 animations held in memory while playing
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constexpr auto kMaxWallPaperInMemory = kMaxFileInMemory;
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constexpr auto kMaxAnimationInMemory = kMaxFileInMemory;
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// 4096x4096 is max area.
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constexpr auto kMaxWallPaperDimension = 4096;
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} // namespace Storage
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struct StorageImageSaved {
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StorageImageSaved() = default;
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explicit StorageImageSaved(const QByteArray &data) : data(data) {
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}
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QByteArray data;
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};
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class FileLoader : public QObject {
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Q_OBJECT
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public:
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FileLoader(
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const QString &toFile,
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int32 size,
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LocationType locationType,
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LoadToCacheSetting toCache,
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LoadFromCloudSetting fromCloud,
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bool autoLoading,
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uint8 cacheTag);
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virtual ~FileLoader();
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[[nodiscard]] Main::Session &session() const;
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bool finished() const {
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return _finished;
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}
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void finishWithBytes(const QByteArray &data);
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bool cancelled() const {
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return _cancelled;
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}
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const QByteArray &bytes() const {
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return _data;
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}
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virtual uint64 objId() const {
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return 0;
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}
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QByteArray imageFormat(const QSize &shrinkBox = QSize()) const;
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QImage imageData(const QSize &shrinkBox = QSize()) const;
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QString fileName() const {
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return _filename;
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}
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// Used in MainWidget::documentLoadFailed.
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[[nodiscard]] virtual Data::FileOrigin fileOrigin() const;
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float64 currentProgress() const;
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virtual int currentOffset() const;
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int fullSize() const;
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bool setFileName(const QString &filename); // set filename for loaders to cache
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void permitLoadFromCloud();
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void start();
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void cancel();
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bool loadingLocal() const {
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return (_localStatus == LocalStatus::Loading);
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}
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bool autoLoading() const {
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return _autoLoading;
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}
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void localLoaded(
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const StorageImageSaved &result,
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const QByteArray &imageFormat,
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const QImage &imageData);
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signals:
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void progress(FileLoader *loader);
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void failed(FileLoader *loader, bool started);
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protected:
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enum class LocalStatus {
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NotTried,
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NotFound,
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Loading,
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Loaded,
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};
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void readImage(const QSize &shrinkBox) const;
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bool tryLoadLocal();
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void loadLocal(const Storage::Cache::Key &key);
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virtual Storage::Cache::Key cacheKey() const = 0;
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virtual std::optional<MediaKey> fileLocationKey() const = 0;
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virtual void cancelHook() = 0;
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virtual void startLoading() = 0;
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void cancel(bool failed);
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void notifyAboutProgress();
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bool writeResultPart(int offset, bytes::const_span buffer);
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bool finalizeResult();
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[[nodiscard]] QByteArray readLoadedPartBack(int offset, int size);
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const not_null<Main::Session*> _session;
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bool _autoLoading = false;
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uint8 _cacheTag = 0;
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bool _finished = false;
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bool _cancelled = false;
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mutable LocalStatus _localStatus = LocalStatus::NotTried;
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QString _filename;
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QFile _file;
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bool _fileIsOpen = false;
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LoadToCacheSetting _toCache;
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LoadFromCloudSetting _fromCloud;
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QByteArray _data;
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int _size = 0;
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int _skippedBytes = 0;
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LocationType _locationType = LocationType();
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base::binary_guard _localLoading;
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mutable QByteArray _imageFormat;
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mutable QImage _imageData;
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};
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