Highlight album part that had a reply clicked.

Telegram/SourceFiles/history/admin_log/history_admin_log_inner.cpp

@@ -556,7 +556,7 @@ bool InnerWidget::elementUnderCursor(
 }
 
 crl::time InnerWidget::elementHighlightTime(
-		not_null<const HistoryView::Element*> element) {
+		not_null<const HistoryItem*> item) {
 	return crl::time(0);
 }
 

Telegram/SourceFiles/history/admin_log/history_admin_log_inner.h

@@ -97,7 +97,7 @@ public:
 	bool elementUnderCursor(
 		not_null<const HistoryView::Element*> view) override;
 	crl::time elementHighlightTime(
-		not_null<const HistoryView::Element*> element) override;
+		not_null<const HistoryItem*> item) override;
 	bool elementInSelectionMode() override;
 	bool elementIntersectsRange(
 		not_null<const HistoryView::Element*> view,

Telegram/SourceFiles/history/history_inner_widget.cpp

@@ -2520,9 +2520,9 @@ void HistoryInner::elementStartStickerLoop(
 	_animatedStickersPlayed.emplace(view->data());
 }
 
-crl::time HistoryInner::elementHighlightTime(not_null<const Element*> view) {
-	const auto fullAnimMs = _controller->content()->highlightStartTime(
-		view->data());
+crl::time HistoryInner::elementHighlightTime(
+		not_null<const HistoryItem*> item) {
+	const auto fullAnimMs = _controller->content()->highlightStartTime(item);
 	if (fullAnimMs > 0) {
 		const auto now = crl::now();
 		if (fullAnimMs < now) {
@@ -3421,8 +3421,8 @@ not_null<HistoryView::ElementDelegate*> HistoryInner::ElementDelegate() {
 			return (App::hoveredItem() == view);
 		}
 		crl::time elementHighlightTime(
-				not_null<const Element*> view) override {
-			return Instance ? Instance->elementHighlightTime(view) : 0;
+				not_null<const HistoryItem*> item) override {
+			return Instance ? Instance->elementHighlightTime(item) : 0;
 		}
 		bool elementInSelectionMode() override {
 			return Instance ? Instance->inSelectionMode() : false;

Telegram/SourceFiles/history/history_inner_widget.h

@@ -84,7 +84,7 @@ public:
 		int till) const;
 	void elementStartStickerLoop(not_null<const Element*> view);
 	[[nodiscard]] crl::time elementHighlightTime(
-		not_null<const Element*> view);
+		not_null<const HistoryItem*> item);
 	void elementShowPollResults(
 		not_null<PollData*> poll,
 		FullMsgId context);

Telegram/SourceFiles/history/history_widget.cpp

@@ -1045,11 +1045,6 @@ void HistoryWidget::scrollToAnimationCallback(
 
 void HistoryWidget::enqueueMessageHighlight(
 		not_null<HistoryView::Element*> view) {
-	if (const auto group = session().data().groups().find(view->data())) {
-		if (const auto leader = group->items.front()->mainView()) {
-			view = leader;
-		}
-	}
 	auto enqueueMessageId = [this](MsgId universalId) {
 		if (_highlightQueue.empty() && !_highlightTimer.isActive()) {
 			highlightMessage(universalId);
@@ -1096,7 +1091,7 @@ void HistoryWidget::checkNextHighlight() {
 
 void HistoryWidget::updateHighlightedMessage() {
 	const auto item = getItemFromHistoryOrMigrated(_highlightedMessageId);
-	const auto view = item ? item->mainView() : nullptr;
+	auto view = item ? item->mainView() : nullptr;
 	if (!view) {
 		return stopMessageHighlight();
 	}
@@ -1105,6 +1100,11 @@ void HistoryWidget::updateHighlightedMessage() {
 		return stopMessageHighlight();
 	}
 
+	if (const auto group = session().data().groups().find(view->data())) {
+		if (const auto leader = group->items.front()->mainView()) {
+			view = leader;
+		}
+	}
 	session().data().requestViewRepaint(view);
 }
 

Telegram/SourceFiles/history/view/history_view_element.cpp

@@ -79,7 +79,7 @@ bool SimpleElementDelegate::elementUnderCursor(
 }
 
 crl::time SimpleElementDelegate::elementHighlightTime(
-	not_null<const Element*> element) {
+		not_null<const HistoryItem*> item) {
 	return crl::time(0);
 }
 
@@ -280,29 +280,44 @@ void Element::refreshDataIdHook() {
 void Element::paintHighlight(
 		Painter &p,
 		int geometryHeight) const {
-	const auto animms = delegate()->elementHighlightTime(this);
-	if (!animms
-		|| animms >= st::activeFadeInDuration + st::activeFadeOutDuration) {
-		return;
-	}
-
 	const auto top = marginTop();
 	const auto bottom = marginBottom();
 	const auto fill = qMin(top, bottom);
 	const auto skiptop = top - fill;
 	const auto fillheight = fill + geometryHeight + fill;
 
-	const auto dt = (animms > st::activeFadeInDuration)
+	paintCustomHighlight(p, skiptop, fillheight, data());
+}
+
+float64 Element::highlightOpacity(not_null<const HistoryItem*> item) const {
+	const auto animms = delegate()->elementHighlightTime(item);
+	if (!animms
+		|| animms >= st::activeFadeInDuration + st::activeFadeOutDuration) {
+		return 0.;
+	}
+
+	return (animms > st::activeFadeInDuration)
 		? (1. - (animms - st::activeFadeInDuration)
 			/ float64(st::activeFadeOutDuration))
 		: (animms / float64(st::activeFadeInDuration));
+}
+
+void Element::paintCustomHighlight(
+		Painter &p,
+		int y,
+		int height,
+		not_null<const HistoryItem*> item) const {
+	const auto opacity = highlightOpacity(item);
+	if (opacity == 0.) {
+		return;
+	}
 	const auto o = p.opacity();
-	p.setOpacity(o * dt);
+	p.setOpacity(o * opacity);
 	p.fillRect(
 		0,
-		skiptop,
+		y,
 		width(),
-		fillheight,
+		height,
 		st::defaultTextPalette.selectOverlay);
 	p.setOpacity(o);
 }

Telegram/SourceFiles/history/view/history_view_element.h

@@ -51,7 +51,7 @@ public:
 		Element *replacing = nullptr) = 0;
 	virtual bool elementUnderCursor(not_null<const Element*> view) = 0;
 	virtual crl::time elementHighlightTime(
-		not_null<const Element*> element) = 0;
+		not_null<const HistoryItem*> item) = 0;
 	virtual bool elementInSelectionMode() = 0;
 	virtual bool elementIntersectsRange(
 		not_null<const Element*> view,
@@ -87,7 +87,7 @@ public:
 		Element *replacing = nullptr) override;
 	bool elementUnderCursor(not_null<const Element*> view) override;
 	crl::time elementHighlightTime(
-		not_null<const Element*> element) override;
+		not_null<const HistoryItem*> item) override;
 	bool elementInSelectionMode() override;
 	bool elementIntersectsRange(
 		not_null<const Element*> view,
@@ -301,6 +301,13 @@ public:
 	virtual void unloadHeavyPart();
 	void checkHeavyPart();
 
+	void paintCustomHighlight(
+		Painter &p,
+		int y,
+		int height,
+		not_null<const HistoryItem*> item) const;
+	float64 highlightOpacity(not_null<const HistoryItem*> item) const;
+
 	// Legacy blocks structure.
 	HistoryBlock *block();
 	const HistoryBlock *block() const;

Telegram/SourceFiles/history/view/history_view_list_widget.cpp

@@ -482,7 +482,7 @@ void ListWidget::highlightMessage(FullMsgId itemId) {
 			_highlightedMessageId = itemId;
 			_highlightTimer.callEach(AnimationTimerDelta);
 
-			repaintItem(view);
+			repaintHighlightedItem(view);
 		}
 	}
 }
@@ -496,10 +496,24 @@ void ListWidget::showAroundPosition(
 	refreshViewer();
 }
 
+void ListWidget::repaintHighlightedItem(not_null<const Element*> view) {
+	if (view->isHiddenByGroup()) {
+		if (const auto group = session().data().groups().find(view->data())) {
+			if (const auto leader = viewForItem(group->items.front())) {
+				if (!leader->isHiddenByGroup()) {
+					repaintItem(leader);
+					return;
+				}
+			}
+		}
+	}
+	repaintItem(view);
+}
+
 void ListWidget::updateHighlightedMessage() {
 	if (const auto item = session().data().message(_highlightedMessageId)) {
 		if (const auto view = viewForItem(item)) {
-			repaintItem(view);
+			repaintHighlightedItem(view);
 			auto duration = st::activeFadeInDuration + st::activeFadeOutDuration;
 			if (crl::now() - _highlightStart <= duration) {
 				return;
@@ -1244,8 +1258,8 @@ bool ListWidget::elementUnderCursor(
 }
 
 crl::time ListWidget::elementHighlightTime(
-		not_null<const HistoryView::Element*> element) {
-	if (element->data()->fullId() == _highlightedMessageId) {
+		not_null<const HistoryItem*> item) {
+	if (item->fullId() == _highlightedMessageId) {
 		if (_highlightTimer.isActive()) {
 			return crl::now() - _highlightStart;
 		}

Telegram/SourceFiles/history/view/history_view_list_widget.h

@@ -221,7 +221,7 @@ public:
 		Element *replacing = nullptr) override;
 	bool elementUnderCursor(not_null<const Element*> view) override;
 	crl::time elementHighlightTime(
-		not_null<const Element*> element) override;
+		not_null<const HistoryItem*> item) override;
 	bool elementInSelectionMode() override;
 	bool elementIntersectsRange(
 		not_null<const Element*> view,
@@ -340,6 +340,7 @@ private:
 	int itemTop(not_null<const Element*> view) const;
 	void repaintItem(FullMsgId itemId);
 	void repaintItem(const Element *view);
+	void repaintHighlightedItem(not_null<const Element*> view);
 	void resizeItem(not_null<Element*> view);
 	void refreshItem(not_null<const Element*> view);
 	void itemRemoved(not_null<const HistoryItem*> item);

Telegram/SourceFiles/history/view/history_view_message.cpp

@@ -570,7 +570,40 @@ void Message::draw(
 		return;
 	}
 
-	paintHighlight(p, g.height());
+	auto entry = logEntryOriginal();
+	auto mediaDisplayed = media && media->isDisplayed();
+
+	// Entry page is always a bubble bottom.
+	auto mediaOnBottom = (mediaDisplayed && media->isBubbleBottom()) || (entry/* && entry->isBubbleBottom()*/);
+	auto mediaOnTop = (mediaDisplayed && media->isBubbleTop()) || (entry && entry->isBubbleTop());
+
+	auto mediaSelectionIntervals = (!selected && mediaDisplayed)
+		? media->getBubbleSelectionIntervals(selection)
+		: std::vector<BubbleSelectionInterval>();
+	auto localMediaTop = 0;
+	const auto customHighlight = mediaDisplayed && media->customHighlight();
+	if (!mediaSelectionIntervals.empty() || customHighlight) {
+		auto localMediaBottom = g.top() + g.height();
+		if (data()->repliesAreComments() || data()->externalReply()) {
+			localMediaBottom -= st::historyCommentsButtonHeight;
+		}
+		if (!mediaOnBottom) {
+			localMediaBottom -= st::msgPadding.bottom();
+		}
+		if (entry) {
+			localMediaBottom -= entry->height();
+		}
+		localMediaTop = localMediaBottom - media->height();
+		for (auto &[top, height] : mediaSelectionIntervals) {
+			top += localMediaTop;
+		}
+	}
+
+	if (customHighlight) {
+		media->drawHighlight(p, localMediaTop);
+	} else {
+		paintHighlight(p, g.height());
+	}
 
 	const auto roll = media ? media->bubbleRoll() : Media::BubbleRoll();
 	if (roll) {
@@ -602,34 +635,6 @@ void Message::draw(
 			fromNameUpdated(g.width());
 		}
 
-		auto entry = logEntryOriginal();
-		auto mediaDisplayed = media && media->isDisplayed();
-
-		// Entry page is always a bubble bottom.
-		auto mediaOnBottom = (mediaDisplayed && media->isBubbleBottom()) || (entry/* && entry->isBubbleBottom()*/);
-		auto mediaOnTop = (mediaDisplayed && media->isBubbleTop()) || (entry && entry->isBubbleTop());
-
-
-		auto mediaSelectionIntervals = (!selected && mediaDisplayed)
-			? media->getBubbleSelectionIntervals(selection)
-			: std::vector<BubbleSelectionInterval>();
-		if (!mediaSelectionIntervals.empty()) {
-			auto localMediaBottom = g.top() + g.height();
-			if (data()->repliesAreComments() || data()->externalReply()) {
-				localMediaBottom -= st::historyCommentsButtonHeight;
-			}
-			if (!mediaOnBottom) {
-				localMediaBottom -= st::msgPadding.bottom();
-			}
-			if (entry) {
-				localMediaBottom -= entry->height();
-			}
-			const auto localMediaTop = localMediaBottom - media->height();
-			for (auto &[top, height] : mediaSelectionIntervals) {
-				top += localMediaTop;
-			}
-		}
-
 		auto skipTail = isAttachedToNext()
 			|| (media && media->skipBubbleTail())
 			|| (keyboard != nullptr)

Telegram/SourceFiles/history/view/media/history_view_document.cpp

@@ -951,6 +951,7 @@ void Document::drawGrouped(
 		const QRect &geometry,
 		RectParts sides,
 		RectParts corners,
+		float64 highlightOpacity,
 		not_null<uint64*> cacheKey,
 		not_null<QPixmap*> cache) const {
 	p.translate(geometry.topLeft());

Telegram/SourceFiles/history/view/media/history_view_document.h

@@ -72,6 +72,7 @@ public:
 		const QRect &geometry,
 		RectParts sides,
 		RectParts corners,
+		float64 highlightOpacity,
 		not_null<uint64*> cacheKey,
 		not_null<QPixmap*> cache) const override;
 	TextState getStateGrouped(

Telegram/SourceFiles/history/view/media/history_view_gif.cpp

@@ -901,6 +901,7 @@ void Gif::drawGrouped(
 		const QRect &geometry,
 		RectParts sides,
 		RectParts corners,
+		float64 highlightOpacity,
 		not_null<uint64*> cacheKey,
 		not_null<QPixmap*> cache) const {
 	ensureDataMediaCreated();
@@ -989,8 +990,16 @@ void Gif::drawGrouped(
 		p.drawPixmap(geometry, *cache);
 	}
 
-	if (selected) {
+	const auto overlayOpacity = selected
+		? (1. - highlightOpacity)
+		: highlightOpacity;
+	if (overlayOpacity > 0.) {
+		p.setOpacity(overlayOpacity);
 		Ui::FillComplexOverlayRect(p, geometry, roundRadius, corners);
+		if (!selected) {
+			Ui::FillComplexOverlayRect(p, geometry, roundRadius, corners);
+		}
+		p.setOpacity(1.);
 	}
 
 	if (radial

Telegram/SourceFiles/history/view/media/history_view_gif.h

@@ -79,6 +79,7 @@ public:
 		const QRect &geometry,
 		RectParts sides,
 		RectParts corners,
+		float64 highlightOpacity,
 		not_null<uint64*> cacheKey,
 		not_null<QPixmap*> cache) const override;
 	TextState getStateGrouped(

Telegram/SourceFiles/history/view/media/history_view_media.h

@@ -84,6 +84,8 @@ public:
 	}
 	virtual void refreshParentId(not_null<HistoryItem*> realParent) {
 	}
+	virtual void drawHighlight(Painter &p, int top) const {
+	}
 	virtual void draw(
 		Painter &p,
 		const QRect &r,
@@ -177,6 +179,7 @@ public:
 			const QRect &geometry,
 			RectParts sides,
 			RectParts corners,
+			float64 highlightOpacity,
 			not_null<uint64*> cacheKey,
 			not_null<QPixmap*> cache) const {
 		Unexpected("Grouping method call.");
@@ -274,6 +277,9 @@ public:
 		const QRect &bubble,
 		crl::time ms) const {
 	}
+	[[nodiscard]] virtual bool customHighlight() const {
+		return false;
+	}
 
 	virtual bool hasHeavyPart() const {
 		return false;

Telegram/SourceFiles/history/view/media/history_view_media_grouped.cpp

@@ -268,6 +268,18 @@ QMargins GroupedMedia::groupedPadding() const {
 		(normal.bottom() - grouped.bottom()) + addToBottom);
 }
 
+void GroupedMedia::drawHighlight(Painter &p, int top) const {
+	if (_mode != Mode::Column) {
+		return;
+	}
+	const auto skip = top + groupedPadding().top();
+	for (auto i = 0, count = int(_parts.size()); i != count; ++i) {
+		const auto &part = _parts[i];
+		const auto rect = part.geometry.translated(0, skip);
+		_parent->paintCustomHighlight(p, rect.y(), rect.height(), part.item);
+	}
+}
+
 void GroupedMedia::draw(
 		Painter &p,
 		const QRect &clip,
@@ -290,6 +302,9 @@ void GroupedMedia::draw(
 		if (textSelection) {
 			selection = part.content->skipSelection(selection);
 		}
+		const auto highlightOpacity = (_mode == Mode::Grid)
+			? _parent->highlightOpacity(part.item)
+			: 0.;
 		part.content->drawGrouped(
 			p,
 			clip,
@@ -298,6 +313,7 @@ void GroupedMedia::draw(
 			part.geometry.translated(0, groupPadding.top()),
 			part.sides,
 			cornersFromSides(part.sides),
+			highlightOpacity,
 			&part.cacheKey,
 			&part.cache);
 	}

Telegram/SourceFiles/history/view/media/history_view_media_grouped.h

@@ -31,6 +31,7 @@ public:
 
 	void refreshParentId(not_null<HistoryItem*> realParent) override;
 
+	void drawHighlight(Painter &p, int top) const override;
 	void draw(
 		Painter &p,
 		const QRect &clip,
@@ -87,6 +88,9 @@ public:
 	bool allowsFastShare() const override {
 		return true;
 	}
+	bool customHighlight() const override {
+		return true;
+	}
 
 	void stopAnimation() override;
 	void checkAnimation() override;

Telegram/SourceFiles/history/view/media/history_view_photo.cpp

@@ -485,6 +485,7 @@ void Photo::drawGrouped(
 		const QRect &geometry,
 		RectParts sides,
 		RectParts corners,
+		float64 highlightOpacity,
 		not_null<uint64*> cacheKey,
 		not_null<QPixmap*> cache) const {
 	ensureDataMediaCreated();
@@ -509,9 +510,18 @@ void Photo::drawGrouped(
 //		App::roundShadow(p, 0, 0, paintw, painth, selected ? st::msgInShadowSelected : st::msgInShadow, selected ? InSelectedShadowCorners : InShadowCorners);
 	}
 	p.drawPixmap(geometry.topLeft(), *cache);
-	if (selected) {
+
+	const auto overlayOpacity = selected
+		? (1. - highlightOpacity)
+		: highlightOpacity;
+	if (overlayOpacity > 0.) {
+		p.setOpacity(overlayOpacity);
 		const auto roundRadius = ImageRoundRadius::Large;
 		Ui::FillComplexOverlayRect(p, geometry, roundRadius, corners);
+		if (!selected) {
+			Ui::FillComplexOverlayRect(p, geometry, roundRadius, corners);
+		}
+		p.setOpacity(1.);
 	}
 
 	const auto displayState = radial

Telegram/SourceFiles/history/view/media/history_view_photo.h

@@ -68,6 +68,7 @@ public:
 		const QRect &geometry,
 		RectParts sides,
 		RectParts corners,
+		float64 highlightOpacity,
 		not_null<uint64*> cacheKey,
 		not_null<QPixmap*> cache) const override;
 	TextState getStateGrouped(