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Telegram/SourceFiles/ui/effects/reaction_fly_animation.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 "ui/effects/animations.h"
+#include "data/data_message_reaction_id.h"
+
+namespace Ui::Text {
+class CustomEmoji;
+} // namespace Ui::Text
+
+namespace Data {
+class Reactions;
+enum class CustomEmojiSizeTag : uchar;
+} // namespace Data
+
+namespace Ui {
+
+class AnimatedIcon;
+
+struct ReactionFlyAnimationArgs {
+	::Data::ReactionId id;
+	QImage flyIcon;
+	QRect flyFrom;
+	crl::time scaleOutDuration = 0;
+	float64 scaleOutTarget = 0.;
+	float64 miniCopyMultiplier = 1.;
+	bool effectOnly = false;
+	bool forceFirstFrame = false;
+
+	[[nodiscard]] ReactionFlyAnimationArgs translated(QPoint point) const;
+};
+
+struct ReactionFlyCenter {
+	std::unique_ptr<Text::CustomEmoji> custom;
+	std::unique_ptr<AnimatedIcon> icon;
+	float64 scale = 0.;
+	float64 centerSizeMultiplier = 0.;
+	int customSize = 0;
+	int size = 0;
+	bool forceFirstFrame = false;
+};
+
+class ReactionFlyAnimation final {
+public:
+	ReactionFlyAnimation(
+		not_null<::Data::Reactions*> owner,
+		ReactionFlyAnimationArgs &&args,
+		Fn<void()> repaint,
+		int size,
+		Data::CustomEmojiSizeTag customSizeTag = {});
+	~ReactionFlyAnimation();
+
+	void setRepaintCallback(Fn<void()> repaint);
+	QRect paintGetArea(
+		QPainter &p,
+		QPoint origin,
+		QRect target,
+		const QColor &colored,
+		QRect clip,
+		crl::time now) const;
+
+	[[nodiscard]] bool flying() const;
+	[[nodiscard]] float64 flyingProgress() const;
+	[[nodiscard]] bool finished() const;
+
+	[[nodiscard]] ReactionFlyCenter takeCenter();
+
+private:
+	struct Parabolic {
+		float64 a = 0.;
+		float64 b = 0.;
+		std::optional<int> key;
+	};
+	struct MiniCopy {
+		mutable Parabolic cached;
+		float64 maxScale = 1.;
+		float64 duration = 1.;
+		int flyUp = 0;
+		int finalX = 0;
+		int finalY = 0;
+	};
+
+	[[nodiscard]] auto flyCallback();
+	[[nodiscard]] auto callback();
+	void startAnimations();
+	int computeParabolicTop(
+		Parabolic &cache,
+		int from,
+		int to,
+		int top,
+		float64 progress) const;
+	void paintCenterFrame(
+		QPainter &p,
+		QRect target,
+		const QColor &colored,
+		crl::time now) const;
+	void paintMiniCopies(
+		QPainter &p,
+		QPoint center,
+		const QColor &colored,
+		crl::time now) const;
+	void generateMiniCopies(int size, float64 miniCopyMultiplier);
+
+	const not_null<::Data::Reactions*> _owner;
+	Fn<void()> _repaint;
+	QImage _flyIcon;
+	std::unique_ptr<Text::CustomEmoji> _custom;
+	std::unique_ptr<AnimatedIcon> _center;
+	std::unique_ptr<AnimatedIcon> _effect;
+	Animations::Simple _noEffectScaleAnimation;
+	std::vector<MiniCopy> _miniCopies;
+	Animations::Simple _fly;
+	Animations::Simple _minis;
+	QRect _flyFrom;
+	float64 _centerSizeMultiplier = 0.;
+	int _customSize = 0;
+	crl::time _scaleOutDuration = 0;
+	float64 _scaleOutTarget = 0.;
+	bool _noEffectScaleStarted = false;
+	bool _forceFirstFrame = false;
+	bool _effectOnly = false;
+	bool _valid = false;
+
+	mutable Parabolic _cached;
+
+};
+
+} // namespace Ui