Added support of switching between corner layers in dialogs list.

Telegram/SourceFiles/dialogs/dialogs_row.cpp

@@ -27,6 +27,63 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 namespace Dialogs {
 
+constexpr auto kTopLayer = 1;
+constexpr auto kNoneLayer = 0;
+
+Row::CornerLayersManager::CornerLayersManager() = default;
+
+bool Row::CornerLayersManager::isSameLayer(Layer layer) const {
+	return isFinished() && (_nextLayer == layer);
+}
+
+void Row::CornerLayersManager::setLayer(
+		Layer layer,
+		Fn<void()> updateCallback) {
+	if (_nextLayer == layer) {
+		return;
+	}
+	_lastFrameShown = false;
+	_prevLayer = _nextLayer;
+	_nextLayer = layer;
+	if (_animation.animating()) {
+		_animation.change(
+			1.,
+			st::dialogsOnlineBadgeDuration * (1. - _animation.value(1.)));
+	} else if (updateCallback) {
+		_animation.start(
+			std::move(updateCallback),
+			0.,
+			1.,
+			st::dialogsOnlineBadgeDuration);
+	}
+}
+
+float64 Row::CornerLayersManager::progressForLayer(Layer layer) const {
+	return (_nextLayer == layer)
+		? progress()
+		: (_prevLayer == layer)
+		? (1. - progress())
+		: 0.;
+}
+
+float64 Row::CornerLayersManager::progress() const {
+	return _animation.value(1.);
+}
+
+bool Row::CornerLayersManager::isFinished() const {
+	return (progress() == 1.) && _lastFrameShown;
+}
+
+void Row::CornerLayersManager::markFrameShown() {
+	if (progress() == 1.) {
+		_lastFrameShown = true;
+	}
+}
+
+bool Row::CornerLayersManager::isDisplayedNone() const {
+	return (progress() == 1.) && (_nextLayer == 0);
+}
+
 BasicRow::BasicRow() = default;
 BasicRow::~BasicRow() = default;
 
@@ -123,28 +180,25 @@ uint64 Row::sortKey(FilterId filterId) const {
 }
 
 void Row::setCornerBadgeShown(
-		bool shown,
+		CornerLayersManager::Layer nextLayer,
 		Fn<void()> updateCallback) const {
-	const auto value = (shown ? 1 : 0);
-	if (_cornerBadgeShown == value) {
-		return;
-	}
-	const_cast<Row*>(this)->_cornerBadgeShown = value;
-	if (_cornerBadgeUserpic && _cornerBadgeUserpic->animation.animating()) {
-		_cornerBadgeUserpic->animation.change(
-			_cornerBadgeShown ? 1. : 0.,
-			st::dialogsOnlineBadgeDuration);
-	} else if (updateCallback) {
-		ensureCornerBadgeUserpic();
-		_cornerBadgeUserpic->animation.start(
-			std::move(updateCallback),
-			_cornerBadgeShown ? 0. : 1.,
-			_cornerBadgeShown ? 1. : 0.,
-			st::dialogsOnlineBadgeDuration);
+	const auto cornerBadgeShown = (nextLayer ? 1 : 0);
+	if (_cornerBadgeShown == cornerBadgeShown) {
+		if (!cornerBadgeShown) {
+			return;
+		} else if (_cornerBadgeUserpic
+			&& _cornerBadgeUserpic->layersManager.isSameLayer(nextLayer)) {
+			return;
+		}
 	}
+	const_cast<Row*>(this)->_cornerBadgeShown = cornerBadgeShown;
+	ensureCornerBadgeUserpic();
+	_cornerBadgeUserpic->layersManager.setLayer(
+		nextLayer,
+		std::move(updateCallback));
 	if (!_cornerBadgeShown
 		&& _cornerBadgeUserpic
-		&& !_cornerBadgeUserpic->animation.animating()) {
+		&& _cornerBadgeUserpic->layersManager.isDisplayedNone()) {
 		_cornerBadgeUserpic = nullptr;
 	}
 }
@@ -154,16 +208,17 @@ void Row::updateCornerBadgeShown(
 		Fn<void()> updateCallback) const {
 	const auto user = peer->asUser();
 	const auto now = user ? base::unixtime::now() : TimeId();
-	const auto shown = [&] {
-		if (user) {
-			return Data::IsUserOnline(user, now);
-		} else if (const auto channel = peer->asChannel()) {
-			return Data::ChannelHasActiveCall(channel);
+	const auto nextLayer = [&] {
+		if (user && Data::IsUserOnline(user, now)) {
+			return kTopLayer;
+		} else if (peer->isChannel()
+			&& Data::ChannelHasActiveCall(peer->asChannel())) {
+			return kTopLayer;
 		}
-		return false;
+		return kNoneLayer;
 	}();
-	setCornerBadgeShown(shown, std::move(updateCallback));
-	if (shown && user) {
+	setCornerBadgeShown(nextLayer, std::move(updateCallback));
+	if ((nextLayer == kTopLayer) && user) {
 		peer->owner().watchForOffline(user, now);
 	}
 }
@@ -198,6 +253,7 @@ void Row::PaintCornerBadgeFrame(
 	PainterHighQualityEnabler hq(q);
 	q.setCompositionMode(QPainter::CompositionMode_Source);
 
+	const auto progress = data->layersManager.progressForLayer(kTopLayer);
 	const auto size = peer->isUser()
 		? st::dialogsOnlineBadgeSize
 		: st::dialogsCallBadgeSize;
@@ -205,10 +261,10 @@ void Row::PaintCornerBadgeFrame(
 	const auto skip = peer->isUser()
 		? st::dialogsOnlineBadgeSkip
 		: st::dialogsCallBadgeSkip;
-	const auto shrink = (size / 2) * (1. - data->shown);
+	const auto shrink = (size / 2) * (1. - progress);
 
 	auto pen = QPen(Qt::transparent);
-	pen.setWidthF(stroke * data->shown);
+	pen.setWidthF(stroke * progress);
 	q.setPen(pen);
 	q.setBrush(data->active
 		? st::dialogsOnlineBadgeFgActive
@@ -229,10 +285,10 @@ void Row::paintUserpic(
 		const Ui::PaintContext &context) const {
 	updateCornerBadgeShown(peer);
 
-	const auto shown = _cornerBadgeUserpic
-		? _cornerBadgeUserpic->animation.value(_cornerBadgeShown ? 1. : 0.)
-		: (_cornerBadgeShown ? 1. : 0.);
-	if (!historyForCornerBadge || shown == 0.) {
+	const auto cornerBadgeShown = !_cornerBadgeUserpic
+		? _cornerBadgeShown
+		: !_cornerBadgeUserpic->layersManager.isDisplayedNone();
+	if (!historyForCornerBadge || !cornerBadgeShown) {
 		BasicRow::paintUserpic(
 			p,
 			peer,
@@ -261,15 +317,15 @@ void Row::paintUserpic(
 	}
 	const auto key = peer->userpicUniqueKey(userpicView());
 	const auto frameIndex = videoUserpic ? videoUserpic->frameIndex() : -1;
-	if (_cornerBadgeUserpic->shown != shown
+	if (!_cornerBadgeUserpic->layersManager.isFinished()
 		|| _cornerBadgeUserpic->key != key
 		|| _cornerBadgeUserpic->active != context.active
 		|| _cornerBadgeUserpic->frameIndex != frameIndex
 		|| videoUserpic) {
-		_cornerBadgeUserpic->shown = shown;
 		_cornerBadgeUserpic->key = key;
 		_cornerBadgeUserpic->active = context.active;
 		_cornerBadgeUserpic->frameIndex = frameIndex;
+		_cornerBadgeUserpic->layersManager.markFrameShown();
 		PaintCornerBadgeFrame(
 			_cornerBadgeUserpic.get(),
 			peer,
@@ -290,7 +346,8 @@ void Row::paintUserpic(
 		: st::dialogsBg;
 	const auto size = st::dialogsCallBadgeSize;
 	const auto skip = st::dialogsCallBadgeSkip;
-	p.setOpacity(shown);
+	p.setOpacity(
+		_cornerBadgeUserpic->layersManager.progressForLayer(kTopLayer));
 	p.translate(context.st->padding.left(), context.st->padding.top());
 	actionPainter->paintSpeaking(
 		p,

Telegram/SourceFiles/dialogs/dialogs_row.h

@@ -143,17 +143,37 @@ public:
 private:
 	friend class List;
 
+	class CornerLayersManager {
+	public:
+		using Layer = int;
+		CornerLayersManager();
+
+		[[nodiscard]] bool isSameLayer(Layer layer) const;
+		[[nodiscard]] bool isDisplayedNone() const;
+		[[nodiscard]] float64 progressForLayer(Layer layer) const;
+		[[nodiscard]] float64 progress() const;
+		[[nodiscard]] bool isFinished() const;
+		void setLayer(Layer layer, Fn<void()> updateCallback);
+		void markFrameShown();
+
+	private:
+		bool _lastFrameShown = false;
+		Layer _prevLayer = 0;
+		Layer _nextLayer = 0;
+		Ui::Animations::Simple _animation;
+
+	};
+
 	struct CornerBadgeUserpic {
 		InMemoryKey key;
-		float64 shown = 0.;
+		CornerLayersManager layersManager;
 		int frameIndex = -1;
 		bool active = false;
 		QImage frame;
-		Ui::Animations::Simple animation;
 	};
 
 	void setCornerBadgeShown(
-		bool shown,
+		CornerLayersManager::Layer nextLayer,
 		Fn<void()> updateCallback) const;
 	void ensureCornerBadgeUserpic() const;
 	static void PaintCornerBadgeFrame(