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Telegram/SourceFiles/window/window_media_preview.h

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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
+*/
+#pragma once
+
+#include "media/clip/media_clip_reader.h"
+#include "ui/effects/animations.h"
+#include "data/data_file_origin.h"
+#include "ui/rp_widget.h"
+
+namespace Data {
+class PhotoMedia;
+class DocumentMedia;
+} // namespace Data
+
+namespace Lottie {
+class SinglePlayer;
+} // namespace Lottie
+
+namespace Window {
+
+class SessionController;
+
+class MediaPreviewWidget final : public Ui::RpWidget {
+public:
+	MediaPreviewWidget(
+		QWidget *parent,
+		not_null<Window::SessionController*> controller);
+
+	void showPreview(
+		Data::FileOrigin origin,
+		not_null<DocumentData*> document);
+	void showPreview(
+		Data::FileOrigin origin,
+		not_null<PhotoData*> photo);
+	void hidePreview();
+	void setCustomPadding(const QMargins &padding = QMargins());
+	void setBackgroundMargins(const QMargins &margins = QMargins());
+	void setCustomRadius(int radius);
+	void setCustomDuration(crl::time duration);
+
+	~MediaPreviewWidget();
+
+protected:
+	void paintEvent(QPaintEvent *e) override;
+	void resizeEvent(QResizeEvent *e) override;
+
+private:
+	void validateGifAnimation();
+	void startGifAnimation(const Media::Clip::ReaderPointer &gif);
+	QSize currentDimensions() const;
+	QPixmap currentImage() const;
+	void createLottieIfReady(not_null<DocumentData*> document);
+	void setupLottie();
+	void startShow();
+	void fillEmojiString();
+	void resetGifAndCache();
+	[[nodiscard]] QPoint innerPosition(QSize size) const;
+	[[nodiscard]] QPoint outerPosition(QSize size) const;
+	[[nodiscard]] QRect updateArea() const;
+
+	not_null<Window::SessionController*> _controller;
+
+	Ui::Animations::Simple _a_shown;
+	bool _hiding = false;
+	Data::FileOrigin _origin;
+	PhotoData *_photo = nullptr;
+	DocumentData *_document = nullptr;
+	std::shared_ptr<Data::PhotoMedia> _photoMedia;
+	std::shared_ptr<Data::DocumentMedia> _documentMedia;
+	Media::Clip::ReaderPointer _gif, _gifThumbnail;
+	bool _gifWithAlpha = false;
+	crl::time _gifLastPosition = 0;
+	std::unique_ptr<Lottie::SinglePlayer> _lottie;
+	std::unique_ptr<Lottie::SinglePlayer> _effect;
+
+	int _emojiSize;
+	std::vector<not_null<EmojiPtr>> _emojiList;
+
+	void clipCallback(Media::Clip::Notification notification);
+
+	enum CacheStatus {
+		CacheNotLoaded,
+		CacheThumbLoaded,
+		CacheLoaded,
+	};
+	mutable CacheStatus _cacheStatus = CacheNotLoaded;
+	mutable QPixmap _cache;
+	mutable QSize _cachedSize;
+	QMargins _customPadding;
+	QMargins _backgroundMargins;
+	int _customRadius = 0;
+	crl::time _customDuration = 0;
+
+};
+
+} // namespace Window