Make monoforum sender badges float.

Telegram/SourceFiles/history/admin_log/history_admin_log_inner.h

@@ -251,7 +251,7 @@ private:
 	// for each found message (in given direction) in the passed history with passed top offset.
 	//
 	// Method has "bool (*Method)(not_null<Element*> view, int itemtop, int itembottom)" signature
-	// if it returns false the enumeration stops immidiately.
+	// if it returns false the enumeration stops immediately.
 	template <EnumItemsDirection direction, typename Method>
 	void enumerateItems(Method method);
 

Telegram/SourceFiles/history/history_inner_widget.cpp

@@ -916,6 +916,62 @@ void HistoryInner::enumerateDates(Method method) {
 	enumerateItems<EnumItemsDirection::BottomToTop>(dateCallback);
 }
 
+template <typename Method>
+void HistoryInner::enumerateMonoforumSenders(Method method) {
+	if (!_history->amMonoforumAdmin()) {
+		return;
+	}
+
+	const auto skip = (_scrollDateOpacity.animating() || _scrollDateShown)
+		? int(base::SafeRound(
+			(_scrollDateOpacity.value(_scrollDateShown ? 1. : 0.)
+				* (st::msgServicePadding.bottom()
+					+ st::msgServiceFont->height
+					+ st::msgServicePadding.top()
+					+ st::msgServiceMargin.top()))))
+		: 0;
+
+	// Find and remember the bottom of an single-day messages pack
+	// -1 means we didn't find a same-day with previous message yet.
+	auto lowestInOneBunchItemBottom = -1;
+
+	auto senderCallback = [&](not_null<Element*> view, int itemtop, int itembottom) {
+		const auto item = view->data();
+		if (lowestInOneBunchItemBottom < 0 && view->isInOneBunchWithPrevious()) {
+			lowestInOneBunchItemBottom = itembottom - view->marginBottom();
+		}
+
+		// Call method on a sender for all messages that have it and for those who are not showing it
+		// because they are in a one day together with the previous message if they are top-most visible.
+		if (view->displayMonoforumSender() || (!item->isEmpty() && itemtop <= _visibleAreaTop)) {
+			if (lowestInOneBunchItemBottom < 0) {
+				lowestInOneBunchItemBottom = itembottom - view->marginBottom();
+			}
+			// Attach sender to the top of the visible area with the same margin as it has in service message.
+			int senderTop = qMax(itemtop + view->displayedDateHeight(), _visibleAreaTop + skip) + st::msgServiceMargin.top();
+
+			// Do not let the sender go below the single-sender messages pack bottom line.
+			int senderHeight = st::msgServicePadding.bottom() + st::msgServiceFont->height + st::msgServicePadding.top();
+			senderTop = qMin(senderTop, lowestInOneBunchItemBottom - senderHeight);
+
+			// Call the template callback function that was passed
+			// and return if it finished everything it needed.
+			if (!method(view, itemtop, senderTop)) {
+				return false;
+			}
+		}
+
+		// Forget the found bottom of the pack, search for the next one from scratch.
+		if (!view->isInOneBunchWithPrevious()) {
+			lowestInOneBunchItemBottom = -1;
+		}
+
+		return true;
+	};
+
+	enumerateItems<EnumItemsDirection::BottomToTop>(senderCallback);
+}
+
 TextSelection HistoryInner::computeRenderSelection(
 		not_null<const SelectedItems*> selected,
 		not_null<Element*> view) const {
@@ -1291,14 +1347,6 @@ void HistoryInner::paintEvent(QPaintEvent *e) {
 	const auto dateHeight = st::msgServicePadding.bottom()
 		+ st::msgServiceFont->height
 		+ st::msgServicePadding.top();
-	//QDate lastDate;
-	//if (!_history->isEmpty()) {
-	//	lastDate = _history->blocks.back()->messages.back()->data()->date.date();
-	//}
-
-	//// if item top is before this value always show date as a floating date
-	//int showFloatingBefore = height() - 2 * (_visibleAreaBottom - _visibleAreaTop) - dateHeight;
-
 	auto scrollDateOpacity = _scrollDateOpacity.value(_scrollDateShown ? 1. : 0.);
 	enumerateDates([&](not_null<Element*> view, int itemtop, int dateTop) {
 		// stop the enumeration if the date is above the painted rect
@@ -1312,21 +1360,13 @@ void HistoryInner::paintEvent(QPaintEvent *e) {
 			const auto correctDateTop = itemtop + st::msgServiceMargin.top();
 			dateInPlace = (dateTop < correctDateTop + dateHeight);
 		}
-		//bool noFloatingDate = (item->date.date() == lastDate && displayDate);
-		//if (noFloatingDate) {
-		//	if (itemtop < showFloatingBefore) {
-		//		noFloatingDate = false;
-		//	}
-		//}
 
 		// paint the date if it intersects the painted rect
 		if (dateTop < clip.top() + clip.height()) {
-			auto opacity = (dateInPlace/* || noFloatingDate*/) ? 1. : scrollDateOpacity;
+			auto opacity = dateInPlace ? 1. : scrollDateOpacity;
 			if (opacity > 0.) {
 				p.setOpacity(opacity);
-				const auto dateY = false // noFloatingDate
-					? itemtop
-					: (dateTop - st::msgServiceMargin.top());
+				const auto dateY = dateTop - st::msgServiceMargin.top();
 				if (const auto date = view->Get<HistoryView::DateBadge>()) {
 					date->paint(p, context.st, dateY, _contentWidth, _isChatWide);
 				} else {
@@ -1344,6 +1384,38 @@ void HistoryInner::paintEvent(QPaintEvent *e) {
 	});
 	p.setOpacity(1.);
 
+	enumerateMonoforumSenders([&](not_null<Element*> view, int itemtop, int senderTop) {
+		// stop the enumeration if the sender is above the painted rect
+		if (senderTop + dateHeight <= clip.top()) {
+			return false;
+		}
+
+		const auto displaySender = view->displayMonoforumSender();
+		auto senderInPlace = displaySender;
+		if (senderInPlace) {
+			const auto correctSenderTop = itemtop + view->displayedDateHeight() + st::msgServiceMargin.top();
+			senderInPlace = (senderTop < correctSenderTop + st::msgServiceMargin.top());
+		}
+
+		// paint the sender if it intersects the painted rect
+		if (senderTop < clip.top() + clip.height()) {
+			const auto senderY = senderTop - st::msgServiceMargin.top();
+			if (const auto sender = view->Get<HistoryView::MonoforumSenderBar>()) {
+				sender->paint(p, context.st, senderY, _contentWidth, _isChatWide, !senderInPlace);
+			} else {
+				HistoryView::MonoforumSenderBar::PaintFor(
+					p,
+					context.st,
+					view,
+					_monoforumSenderUserpicView,
+					senderY,
+					_contentWidth,
+					_isChatWide);
+			}
+		}
+		return true;
+	});
+
 	_reactionsManager->paint(p, context);
 }
 
@@ -3566,6 +3638,9 @@ void HistoryInner::toggleScrollDateShown() {
 void HistoryInner::repaintScrollDateCallback() {
 	int updateTop = _visibleAreaTop;
 	int updateHeight = st::msgServiceMargin.top() + st::msgServicePadding.top() + st::msgServiceFont->height + st::msgServicePadding.bottom();
+	if (_history->amMonoforumAdmin()) {
+		updateHeight *= 2;
+	}
 	update(0, updateTop, width(), updateHeight);
 }
 

Telegram/SourceFiles/history/history_inner_widget.h

@@ -15,6 +15,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/dragging_scroll_manager.h"
 #include "ui/widgets/tooltip.h"
 #include "ui/widgets/scroll_area.h"
+#include "ui/userpic_view.h"
 #include "history/view/history_view_top_bar_widget.h"
 
 #include <QtGui/QPainterPath>
@@ -279,7 +280,7 @@ private:
 	// for each found message (in given direction) in the passed history with passed top offset.
 	//
 	// Method has "bool (*Method)(not_null<Element*> view, int itemtop, int itembottom)" signature
-	// if it returns false the enumeration stops immidiately.
+	// if it returns false the enumeration stops immediately.
 	template <bool TopToBottom, typename Method>
 	void enumerateItemsInHistory(History *history, int historytop, Method method);
 
@@ -299,7 +300,7 @@ private:
 	// for each found userpic (from the top to the bottom) using enumerateItems() method.
 	//
 	// Method has "bool (*Method)(not_null<Element*> view, int userpicTop)" signature
-	// if it returns false the enumeration stops immidiately.
+	// if it returns false the enumeration stops immediately.
 	template <typename Method>
 	void enumerateUserpics(Method method);
 
@@ -307,10 +308,18 @@ private:
 	// for each found date element (from the bottom to the top) using enumerateItems() method.
 	//
 	// Method has "bool (*Method)(not_null<Element*> view, int itemtop, int dateTop)" signature
-	// if it returns false the enumeration stops immidiately.
+	// if it returns false the enumeration stops immediately.
 	template <typename Method>
 	void enumerateDates(Method method);
 
+	// This function finds all monoforum sender elements that are displayed and calls template method
+	// for each found date element (from the bottom to the top) using enumerateItems() method.
+	//
+	// Method has "bool (*Method)(not_null<Element*> view, int itemtop, int dateTop)" signature
+	// if it returns false the enumeration stops immediately.
+	template <typename Method>
+	void enumerateMonoforumSenders(Method method);
+
 	void scrollDateCheck();
 	void scrollDateHideByTimer();
 	bool canHaveFromUserpics() const;
@@ -458,6 +467,7 @@ private:
 	int _contentWidth = 0;
 	int _historyPaddingTop = 0;
 	int _revealHeight = 0;
+	Ui::PeerUserpicView _monoforumSenderUserpicView;
 
 	// Save visible area coords for painting / pressing userpics.
 	int _visibleAreaTop = 0;

Telegram/SourceFiles/history/view/history_view_element.cpp

@@ -480,7 +480,7 @@ void DateBadge::paint(
 void MonoforumSenderBar::init(
 		not_null<PeerData*> parentChat,
 		not_null<PeerData*> peer) {
-	author = peer;
+	sender = peer;
 	text.setText(st::semiboldTextStyle, peer->name());
 	const auto skip = st::monoforumBarUserpicSkip;
 	const auto userpic = st::msgServicePadding.top()
@@ -503,8 +503,52 @@ void MonoforumSenderBar::paint(
 		not_null<const Ui::ChatStyle*> st,
 		int y,
 		int w,
-		bool chatWide) const {
-	Expects(author != nullptr);
+		bool chatWide,
+		bool skipPatternLine) const {
+	Paint(p, st, sender, text, width, view, y, w, chatWide, skipPatternLine);
+}
+
+void MonoforumSenderBar::PaintFor(
+		Painter &p,
+		not_null<const Ui::ChatStyle*> st,
+		not_null<Element*> itemView,
+		Ui::PeerUserpicView &userpicView,
+		int y,
+		int w,
+		bool chatWide) {
+	const auto sublist = itemView->data()->savedSublist();
+	const auto sender = (sublist && sublist->parentChat())
+		? sublist->sublistPeer().get()
+		: nullptr;
+	if (!sender || sender->isMonoforum()) {
+		return;
+	}
+	auto text = Ui::Text::String(st::semiboldTextStyle, sender->name());
+	const auto skip = st::monoforumBarUserpicSkip;
+	const auto userpic = st::msgServicePadding.top()
+		+ st::msgServiceFont->height
+		+ st::msgServicePadding.bottom()
+		- 2 * skip;
+	const auto width = skip
+		+ userpic
+		+ skip * 2
+		+ text.maxWidth()
+		+ st::msgServicePadding.right();
+	Paint(p, st, sender, text, width, userpicView, y, w, chatWide, true);
+}
+
+void MonoforumSenderBar::Paint(
+		Painter &p,
+		not_null<const Ui::ChatStyle*> st,
+		not_null<PeerData*> sender,
+		const Ui::Text::String &text,
+		int width,
+		Ui::PeerUserpicView &view,
+		int y,
+		int w,
+		bool chatWide,
+		bool skipPatternLine) {
+	Expects(sender != nullptr);
 
 	int left = st::msgServiceMargin.left();
 	const auto maxwidth = chatWide
@@ -523,7 +567,7 @@ void MonoforumSenderBar::paint(
 		QRect(left, y + st::msgServiceMargin.top(), use, h));
 
 	const auto skip = st::monoforumBarUserpicSkip;
-	{
+	if (!skipPatternLine) {
 		auto pen = st->msgServiceBg()->p;
 		pen.setWidthF(skip);
 		pen.setCapStyle(Qt::RoundCap);
@@ -540,7 +584,7 @@ void MonoforumSenderBar::paint(
 		- 2 * skip;
 	const auto available = use - (skip + userpic + skip * 2 + st::msgServicePadding.right());
 
-	author->paintUserpic(p, view, left + skip, y + st::msgServiceMargin.top() + skip, userpic);
+	sender->paintUserpic(p, view, left + skip, y + st::msgServiceMargin.top() + skip, userpic);
 
 	p.setFont(st::msgServiceFont);
 	p.setPen(st->msgServiceFg());
@@ -1448,6 +1492,14 @@ bool Element::isInOneDayWithPrevious() const {
 	return !data()->isEmpty() && !displayDate();
 }
 
+bool Element::displayMonoforumSender() const {
+	return Has<MonoforumSenderBar>();
+}
+
+bool Element::isInOneBunchWithPrevious() const {
+	return !data()->isEmpty() && !displayMonoforumSender();
+}
+
 void Element::recountAttachToPreviousInBlocks() {
 	if (isHidden() || data()->isEmpty()) {
 		if (const auto next = nextDisplayedInBlocks()) {

Telegram/SourceFiles/history/view/history_view_element.h

@@ -268,13 +268,36 @@ struct MonoforumSenderBar : RuntimeComponent<MonoforumSenderBar, Element> {
 		not_null<const Ui::ChatStyle*> st,
 		int y,
 		int w,
-		bool chatWide) const;
+		bool chatWide,
+		bool skipPatternLine) const;
+	static void PaintFor(
+		Painter &p,
+		not_null<const Ui::ChatStyle*> st,
+		not_null<Element*> itemView,
+		Ui::PeerUserpicView &userpicView,
+		int y,
+		int w,
+		bool chatWide);
 
-	PeerData *author = nullptr;
+	PeerData *sender = nullptr;
 	Ui::Text::String text;
 	ClickHandlerPtr link;
 	mutable Ui::PeerUserpicView view;
 	int width = 0;
+
+private:
+	static void Paint(
+		Painter &p,
+		not_null<const Ui::ChatStyle*> st,
+		not_null<PeerData*> sender,
+		const Ui::Text::String &text,
+		int width,
+		Ui::PeerUserpicView &view,
+		int y,
+		int w,
+		bool chatWide,
+		bool skipPatternLine);
+
 };
 
 // Any HistoryView::Element can have this Component for
@@ -438,6 +461,9 @@ public:
 	[[nodiscard]] bool displayDate() const;
 	[[nodiscard]] bool isInOneDayWithPrevious() const;
 
+	[[nodiscard]] bool displayMonoforumSender() const;
+	[[nodiscard]] bool isInOneBunchWithPrevious() const;
+
 	virtual void draw(Painter &p, const PaintContext &context) const = 0;
 	[[nodiscard]] virtual PointState pointState(QPoint point) const = 0;
 	[[nodiscard]] virtual TextState textState(

Telegram/SourceFiles/history/view/history_view_message.cpp

@@ -1133,40 +1133,22 @@ void Message::draw(Painter &p, const PaintContext &context) const {
 
 	if (const auto bar = Get<UnreadBar>()) {
 		auto unreadbarh = bar->height();
-		auto dateh = 0;
+		auto aboveh = 0;
 		if (const auto date = Get<DateBadge>()) {
-			dateh = date->height();
+			aboveh += date->height();
 		}
-		if (context.clip.intersects(QRect(0, dateh, width(), unreadbarh))) {
-			p.translate(0, dateh);
+		if (const auto sender = Get<MonoforumSenderBar>()) {
+			aboveh += sender->height();
+		}
+		if (context.clip.intersects(QRect(0, aboveh, width(), unreadbarh))) {
+			p.translate(0, aboveh);
 			bar->paint(
 				p,
 				context,
 				0,
 				width(),
 				delegate()->elementIsChatWide());
-			p.translate(0, -dateh);
-		}
-	}
-
-	if (const auto monoforumBar = Get<MonoforumSenderBar>()) {
-		auto barh = monoforumBar->height();
-		auto skip = 0;
-		if (const auto date = Get<DateBadge>()) {
-			skip += date->height();
-		}
-		if (const auto bar = Get<UnreadBar>()) {
-			skip += bar->height();
-		}
-		if (context.clip.intersects(QRect(0, skip, width(), barh))) {
-			p.translate(0, skip);
-			monoforumBar->paint(
-				p,
-				context.st,
-				0,
-				width(),
-				delegate()->elementIsChatWide());
-			p.translate(0, -skip);
+			p.translate(0, -aboveh);
 		}
 	}
 

Telegram/SourceFiles/history/view/history_view_service_message.cpp

@@ -547,40 +547,22 @@ void Service::draw(Painter &p, const PaintContext &context) const {
 	const auto st = context.st;
 	if (const auto bar = Get<UnreadBar>()) {
 		auto unreadbarh = bar->height();
-		auto dateh = 0;
+		auto aboveh = 0;
 		if (const auto date = Get<DateBadge>()) {
-			dateh = date->height();
+			aboveh += date->height();
 		}
-		if (context.clip.intersects(QRect(0, dateh, width(), unreadbarh))) {
-			p.translate(0, dateh);
+		if (const auto sender = Get<MonoforumSenderBar>()) {
+			aboveh += sender->height();
+		}
+		if (context.clip.intersects(QRect(0, aboveh, width(), unreadbarh))) {
+			p.translate(0, aboveh);
 			bar->paint(
 				p,
 				context,
 				0,
 				width(),
 				delegate()->elementIsChatWide());
-			p.translate(0, -dateh);
-		}
-	}
-
-	if (const auto monoforumBar = Get<MonoforumSenderBar>()) {
-		auto barh = monoforumBar->height();
-		auto skip = 0;
-		if (const auto date = Get<DateBadge>()) {
-			skip += date->height();
-		}
-		if (const auto bar = Get<UnreadBar>()) {
-			skip += bar->height();
-		}
-		if (context.clip.intersects(QRect(0, skip, width(), barh))) {
-			p.translate(0, skip);
-			monoforumBar->paint(
-				p,
-				context.st,
-				0,
-				width(),
-				delegate()->elementIsChatWide());
-			p.translate(0, -skip);
+			p.translate(0, -aboveh);
 		}
 	}