Shared media multiple items selection.

Telegram/SourceFiles/base/build_config.h

@@ -64,12 +64,6 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 #error Please add support for your architecture in base/build_config.h
 #endif
 
-#if defined(COMPILER_GCC) || defined(COMPILER_CLANG)
-#define WARN_UNUSED_RESULT __attribute__((warn_unused_result))
-#else
-#define WARN_UNUSED_RESULT
-#endif
-
 #if defined(__GNUC__)
 #define FORCE_INLINE inline __attribute__((always_inline))
 #elif defined(_MSC_VER)

Telegram/SourceFiles/base/flat_map.h

@@ -109,7 +109,18 @@ public:
 	flat_multi_map_iterator_base_impl operator-(difference_type offset) const {
 		return _impl - offset;
 	}
-	difference_type operator-(const flat_multi_map_iterator_base_impl &right) const {
+	template <
+		typename other_iterator_impl,
+		typename other_pointer_impl,
+		typename other_reference_impl>
+	difference_type operator-(
+			const flat_multi_map_iterator_base_impl<
+				Key,
+				Type,
+				Compare,
+				other_iterator_impl,
+				other_pointer_impl,
+				other_reference_impl> &right) const {
 		return _impl - right._impl;
 	}
 	reference operator[](difference_type offset) {
@@ -119,13 +130,46 @@ public:
 		return _impl[offset];
 	}
 
-	bool operator==(const flat_multi_map_iterator_base_impl &right) const {
+	template <
+		typename other_iterator_impl,
+		typename other_pointer_impl,
+		typename other_reference_impl>
+	bool operator==(
+			const flat_multi_map_iterator_base_impl<
+				Key,
+				Type,
+				Compare,
+				other_iterator_impl,
+				other_pointer_impl,
+				other_reference_impl> &right) const {
 		return _impl == right._impl;
 	}
-	bool operator!=(const flat_multi_map_iterator_base_impl &right) const {
+	template <
+		typename other_iterator_impl,
+		typename other_pointer_impl,
+		typename other_reference_impl>
+	bool operator!=(
+			const flat_multi_map_iterator_base_impl<
+				Key,
+				Type,
+				Compare,
+				other_iterator_impl,
+				other_pointer_impl,
+				other_reference_impl> &right) const {
 		return _impl != right._impl;
 	}
-	bool operator<(const flat_multi_map_iterator_base_impl &right) const {
+	template <
+		typename other_iterator_impl,
+		typename other_pointer_impl,
+		typename other_reference_impl>
+	bool operator<(
+			const flat_multi_map_iterator_base_impl<
+				Key,
+				Type,
+				Compare,
+				other_iterator_impl,
+				other_pointer_impl,
+				other_reference_impl> &right) const {
 		return _impl < right._impl;
 	}
 
@@ -133,6 +177,15 @@ private:
 	iterator_impl _impl;
 	friend class flat_multi_map<Key, Type, Compare>;
 
+	template <
+		typename OtherKey,
+		typename OtherType,
+		typename OtherCompare,
+		typename other_iterator_impl,
+		typename other_pointer_impl,
+		typename other_reference_impl>
+	friend class flat_multi_map_iterator_base_impl;
+
 };
 
 template <typename Key, typename Type, typename Compare>
@@ -418,10 +471,10 @@ public:
 		return (range.second - range.first);
 	}
 
-	iterator erase(iterator where) {
+	iterator erase(const_iterator where) {
 		return _impl.erase(where._impl);
 	}
-	iterator erase(iterator from, iterator till) {
+	iterator erase(const_iterator from, const_iterator till) {
 		return _impl.erase(from._impl, till._impl);
 	}
 
@@ -525,37 +578,69 @@ public:
 	using parent::erase;
 	using parent::contains;
 
-	iterator insert(const value_type &value) {
+	std::pair<iterator, bool> insert(const value_type &value) {
 		if (this->empty() || compare()(value.first, this->front().first)) {
 			this->_impl.push_front(value);
-			return this->begin();
+			return { this->begin(), true };
 		} else if (compare()(this->back().first, value.first)) {
 			this->_impl.push_back(value);
-			return (this->end() - 1);
+			return { this->end() - 1, true };
 		}
 		auto where = this->getLowerBound(value.first);
 		if (compare()(value.first, where->first)) {
-			return this->_impl.insert(where, value);
+			return { this->_impl.insert(where, value), true };
 		}
-		return this->end();
+		return { where, false };
 	}
-	iterator insert(value_type &&value) {
+	std::pair<iterator, bool> insert(value_type &&value) {
 		if (this->empty() || compare()(value.first, this->front().first)) {
 			this->_impl.push_front(std::move(value));
-			return this->begin();
+			return { this->begin(), true };
 		} else if (compare()(this->back().first, value.first)) {
 			this->_impl.push_back(std::move(value));
-			return (this->end() - 1);
+			return { this->end() - 1, true };
 		}
 		auto where = this->getLowerBound(value.first);
 		if (compare()(value.first, where->first)) {
-			return this->_impl.insert(where, std::move(value));
+			return { this->_impl.insert(where, std::move(value)), true };
 		}
-		return this->end();
+		return { where, false };
 	}
 	template <typename... Args>
-	iterator emplace(Args&&... args) {
-		return this->insert(value_type(std::forward<Args>(args)...));
+	std::pair<iterator, bool> emplace(
+			const Key &key,
+			Args&&... args) {
+		return this->insert(value_type(
+			key,
+			Type(std::forward<Args>(args)...)));
+	}
+	template <typename... Args>
+	std::pair<iterator, bool> try_emplace(
+			const Key &key,
+			Args&&... args) {
+		if (this->empty() || compare()(key, this->front().first)) {
+			this->_impl.push_front(value_type(
+				key,
+				Type(std::forward<Args>(args)...)));
+			return { this->begin(), true };
+		} else if (compare()(this->back().first, key)) {
+			this->_impl.push_back(value_type(
+				key,
+				Type(std::forward<Args>(args)...)));
+			return { this->end() - 1, true };
+		}
+		auto where = this->getLowerBound(key);
+		if (compare()(key, where->first)) {
+			return {
+				this->_impl.insert(
+					where,
+					value_type(
+						key,
+						Type(std::forward<Args>(args)...))),
+				true
+			};
+		}
+		return { where, false };
 	}
 
 	bool remove(const Key &key) {

Telegram/SourceFiles/base/flat_set.h

@@ -47,6 +47,13 @@ public:
 	flat_multi_set_iterator_base_impl(iterator_impl impl = iterator_impl())
 		: _impl(impl) {
 	}
+	template <typename other_iterator_impl>
+	flat_multi_set_iterator_base_impl(
+			const flat_multi_set_iterator_base_impl<
+				Type,
+				Compare,
+				other_iterator_impl> &other) : _impl(other._impl) {
+	}
 
 	reference operator*() const {
 		return *_impl;
@@ -82,20 +89,40 @@ public:
 	flat_multi_set_iterator_base_impl operator-(difference_type offset) const {
 		return _impl - offset;
 	}
-	difference_type operator-(const flat_multi_set_iterator_base_impl &right) const {
+	template <typename other_iterator_impl>
+	difference_type operator-(
+			const flat_multi_set_iterator_base_impl<
+				Type,
+				Compare,
+				other_iterator_impl> &right) const {
 		return _impl - right._impl;
 	}
 	reference operator[](difference_type offset) const {
 		return _impl[offset];
 	}
 
-	bool operator==(const flat_multi_set_iterator_base_impl &right) const {
+	template <typename other_iterator_impl>
+	bool operator==(
+			const flat_multi_set_iterator_base_impl<
+				Type,
+				Compare,
+				other_iterator_impl> &right) const {
 		return _impl == right._impl;
 	}
-	bool operator!=(const flat_multi_set_iterator_base_impl &right) const {
+	template <typename other_iterator_impl>
+	bool operator!=(
+			const flat_multi_set_iterator_base_impl<
+				Type,
+				Compare,
+				other_iterator_impl> &right) const {
 		return _impl != right._impl;
 	}
-	bool operator<(const flat_multi_set_iterator_base_impl &right) const {
+	template <typename other_iterator_impl>
+	bool operator<(
+			const flat_multi_set_iterator_base_impl<
+				Type,
+				Compare,
+				other_iterator_impl> &right) const {
 		return _impl < right._impl;
 	}
 
@@ -104,6 +131,12 @@ private:
 	friend class flat_multi_set<Type, Compare>;
 	friend class flat_set<Type, Compare>;
 
+	template <
+		typename OtherType,
+		typename OtherCompare,
+		typename other_iterator_impl>
+	friend class flat_multi_set_iterator_base_impl;
+
 	Type &wrapped() {
 		return _impl->wrapped();
 	}
@@ -205,43 +238,24 @@ public:
 	using pointer = const Type*;
 	using reference = const Type&;
 
-	class const_iterator;
 	class iterator : public iterator_base {
 	public:
 		using iterator_base::iterator_base;
-		iterator(const iterator_base &other) : iterator_base(other) {
-		}
-		friend class const_iterator;
 
 	};
 	class const_iterator : public const_iterator_base {
 	public:
 		using const_iterator_base::const_iterator_base;
-		const_iterator(const_iterator_base other) : const_iterator_base(other) {
-		}
-		const_iterator(const iterator &other) : const_iterator_base(other._impl) {
-		}
 
 	};
-	class const_reverse_iterator;
 	class reverse_iterator : public reverse_iterator_base {
 	public:
 		using reverse_iterator_base::reverse_iterator_base;
-		reverse_iterator(reverse_iterator_base other)
-			: reverse_iterator_base(other) {
-		}
-		friend class const_reverse_iterator;
 
 	};
 	class const_reverse_iterator : public const_reverse_iterator_base {
 	public:
 		using const_reverse_iterator_base::const_reverse_iterator_base;
-		const_reverse_iterator(const_reverse_iterator_base other)
-			: const_reverse_iterator_base(other) {
-		}
-		const_reverse_iterator(const reverse_iterator &other)
-			: const_reverse_iterator_base(other._impl) {
-		}
 
 	};
 
@@ -366,10 +380,10 @@ public:
 		return (range.second - range.first);
 	}
 
-	iterator erase(iterator where) {
+	iterator erase(const_iterator where) {
 		return _impl.erase(where._impl);
 	}
-	iterator erase(iterator from, iterator till) {
+	iterator erase(const_iterator from, const_iterator till) {
 		return _impl.erase(from._impl, till._impl);
 	}
 

Telegram/SourceFiles/chat_helpers/gifs_list_widget.cpp

@@ -894,7 +894,9 @@ void GifsListWidget::updateSelected() {
 		}
 		if (col < inlineItems.size()) {
 			sel = row * MatrixRowShift + col;
-			inlineItems.at(col)->getState(lnk, cursor, QPoint(sx, sy));
+			auto result = inlineItems[col]->getState(QPoint(sx, sy), HistoryStateRequest());
+			lnk = result.link;
+			cursor = result.cursor;
 			lnkhost = inlineItems.at(col);
 		} else {
 			row = col = -1;

Telegram/SourceFiles/history/history_inner_widget.cpp

@@ -1033,10 +1033,11 @@ void HistoryInner::itemRemoved(not_null<const HistoryItem*> item) {
 void HistoryInner::mouseActionFinish(const QPoint &screenPos, Qt::MouseButton button) {
 	mouseActionUpdate(screenPos);
 
-	ClickHandlerPtr activated = ClickHandler::unpressed();
+	auto pressedLinkItem = App::pressedLinkItem();
+	auto activated = ClickHandler::unpressed();
 	if (_mouseAction == MouseAction::Dragging) {
 		activated.clear();
-	} else if (auto pressed = App::pressedLinkItem()) {
+	} else if (auto pressed = pressedLinkItem) {
 		// if we are in selecting items mode perhaps we want to
 		// toggle selection instead of activating the pressed link
 		if (_mouseAction == MouseAction::PrepareDrag && !_pressWasInactive && !_selected.empty() && _selected.cbegin()->second == FullSelection && button != Qt::RightButton) {
@@ -2249,23 +2250,21 @@ void HistoryInner::onUpdateSelected() {
 	}
 }
 
-void HistoryInner::updateDragSelection(HistoryItem *dragSelFrom, HistoryItem *dragSelTo, bool dragSelecting, bool force) {
-	if (_dragSelFrom != dragSelFrom || _dragSelTo != dragSelTo || _dragSelecting != dragSelecting) {
-		_dragSelFrom = dragSelFrom;
-		_dragSelTo = dragSelTo;
-		int32 fromy = itemTop(_dragSelFrom), toy = itemTop(_dragSelTo);
-		if (fromy >= 0 && toy >= 0 && fromy > toy) {
-			qSwap(_dragSelFrom, _dragSelTo);
-		}
-		_dragSelecting = dragSelecting;
-		if (!_wasSelectedText && _dragSelFrom && _dragSelTo && _dragSelecting) {
-			_wasSelectedText = true;
-			setFocus();
-		}
-		force = true;
+void HistoryInner::updateDragSelection(HistoryItem *dragSelFrom, HistoryItem *dragSelTo, bool dragSelecting) {
+	if (_dragSelFrom == dragSelFrom && _dragSelTo == dragSelTo && _dragSelecting == dragSelecting) {
+		return;
+	}
+	_dragSelFrom = dragSelFrom;
+	_dragSelTo = dragSelTo;
+	int32 fromy = itemTop(_dragSelFrom), toy = itemTop(_dragSelTo);
+	if (fromy >= 0 && toy >= 0 && fromy > toy) {
+		qSwap(_dragSelFrom, _dragSelTo);
+	}
+	_dragSelecting = dragSelecting;
+	if (!_wasSelectedText && _dragSelFrom && _dragSelTo && _dragSelecting) {
+		_wasSelectedText = true;
+		setFocus();
 	}
-	if (!force) return;
-
 	update();
 }
 

Telegram/SourceFiles/history/history_inner_widget.h

@@ -164,7 +164,7 @@ private:
 	void adjustCurrent(int32 y, History *history) const;
 	HistoryItem *prevItem(HistoryItem *item);
 	HistoryItem *nextItem(HistoryItem *item);
-	void updateDragSelection(HistoryItem *dragSelFrom, HistoryItem *dragSelTo, bool dragSelecting, bool force = false);
+	void updateDragSelection(HistoryItem *dragSelFrom, HistoryItem *dragSelTo, bool dragSelecting);
 
 	void setToClipboard(const TextWithEntities &forClipboard, QClipboard::Mode mode = QClipboard::Clipboard);
 

Telegram/SourceFiles/history/history_item.h

@@ -91,6 +91,8 @@ struct HistoryTextState {
 		symbol = state.symbol;
 		return *this;
 	}
+	HistoryTextState(ClickHandlerPtr link) : link(link) {
+	}
 	HistoryCursorState cursor = HistoryDefaultCursorState;
 	ClickHandlerPtr link;
 	bool afterSymbol = false;
@@ -656,11 +658,15 @@ public:
 		return false;
 	}
 
-	virtual HistoryTextState getState(QPoint point, HistoryStateRequest request) const WARN_UNUSED_RESULT = 0;
+	[[nodiscard]] virtual HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const = 0;
 	virtual void updatePressed(QPoint point) {
 	}
 
-	virtual TextSelection adjustSelection(TextSelection selection, TextSelectType type) const WARN_UNUSED_RESULT {
+	[[nodiscard]] virtual TextSelection adjustSelection(
+			TextSelection selection,
+			TextSelectType type) const {
 		return selection;
 	}
 
@@ -1051,10 +1057,12 @@ protected:
 		return nullptr;
 	}
 
-	TextSelection skipTextSelection(TextSelection selection) const WARN_UNUSED_RESULT {
+	[[nodiscard]] TextSelection skipTextSelection(
+			TextSelection selection) const {
 		return internal::unshiftSelection(selection, _text);
 	}
-	TextSelection unskipTextSelection(TextSelection selection) const WARN_UNUSED_RESULT {
+	[[nodiscard]] TextSelection unskipTextSelection(
+			TextSelection selection) const {
 		return internal::shiftSelection(selection, _text);
 	}
 

Telegram/SourceFiles/history/history_media.h

@@ -93,27 +93,37 @@ public:
 
 	// if we are in selecting items mode perhaps we want to
 	// toggle selection instead of activating the pressed link
-	virtual bool toggleSelectionByHandlerClick(const ClickHandlerPtr &p) const = 0;
+	virtual bool toggleSelectionByHandlerClick(
+		const ClickHandlerPtr &p) const = 0;
 
 	// if we press and drag on this media should we drag the item
-	virtual bool dragItem() const WARN_UNUSED_RESULT {
+	[[nodiscard]] virtual bool dragItem() const {
 		return false;
 	}
 
-	virtual TextSelection adjustSelection(TextSelection selection, TextSelectType type) const WARN_UNUSED_RESULT {
+	[[nodiscard]] virtual TextSelection adjustSelection(
+			TextSelection selection,
+			TextSelectType type) const {
 		return selection;
 	}
-	virtual bool consumeMessageText(const TextWithEntities &textWithEntities) WARN_UNUSED_RESULT {
+	[[nodiscard]] virtual bool consumeMessageText(
+			const TextWithEntities &textWithEntities) {
 		return false;
 	}
-	virtual uint16 fullSelectionLength() const WARN_UNUSED_RESULT {
+	[[nodiscard]] virtual uint16 fullSelectionLength() const {
 		return 0;
 	}
-	TextSelection skipSelection(TextSelection selection) const WARN_UNUSED_RESULT {
-		return internal::unshiftSelection(selection, fullSelectionLength());
+	[[nodiscard]] TextSelection skipSelection(
+			TextSelection selection) const {
+		return internal::unshiftSelection(
+			selection,
+			fullSelectionLength());
 	}
-	TextSelection unskipSelection(TextSelection selection) const WARN_UNUSED_RESULT {
-		return internal::shiftSelection(selection, fullSelectionLength());
+	[[nodiscard]] TextSelection unskipSelection(
+			TextSelection selection) const {
+		return internal::shiftSelection(
+			selection,
+			fullSelectionLength());
 	}
 
 	// if we press and drag this link should we drag the item

Telegram/SourceFiles/history/history_media_types.h

@@ -144,7 +144,9 @@ public:
 	void draw(Painter &p, const QRect &r, TextSelection selection, TimeMs ms) const override;
 	HistoryTextState getState(QPoint point, HistoryStateRequest request) const override;
 
-	TextSelection adjustSelection(TextSelection selection, TextSelectType type) const override WARN_UNUSED_RESULT {
+	[[nodiscard]] TextSelection adjustSelection(
+			TextSelection selection,
+			TextSelectType type) const override {
 		return _caption.adjustSelection(selection, type);
 	}
 	uint16 fullSelectionLength() const override {
@@ -230,7 +232,9 @@ public:
 	void draw(Painter &p, const QRect &r, TextSelection selection, TimeMs ms) const override;
 	HistoryTextState getState(QPoint point, HistoryStateRequest request) const override;
 
-	TextSelection adjustSelection(TextSelection selection, TextSelectType type) const override WARN_UNUSED_RESULT {
+	[[nodiscard]] TextSelection adjustSelection(
+			TextSelection selection,
+			TextSelectType type) const override {
 		return _caption.adjustSelection(selection, type);
 	}
 	uint16 fullSelectionLength() const override {
@@ -382,7 +386,9 @@ public:
 	HistoryTextState getState(QPoint point, HistoryStateRequest request) const override;
 	void updatePressed(QPoint point) override;
 
-	TextSelection adjustSelection(TextSelection selection, TextSelectType type) const override WARN_UNUSED_RESULT {
+	[[nodiscard]] TextSelection adjustSelection(
+			TextSelection selection,
+			TextSelectType type) const override {
 		if (auto captioned = Get<HistoryDocumentCaptioned>()) {
 			return captioned->_caption.adjustSelection(selection, type);
 		}
@@ -495,7 +501,9 @@ public:
 	void draw(Painter &p, const QRect &r, TextSelection selection, TimeMs ms) const override;
 	HistoryTextState getState(QPoint point, HistoryStateRequest request) const override;
 
-	TextSelection adjustSelection(TextSelection selection, TextSelectType type) const override WARN_UNUSED_RESULT {
+	[[nodiscard]] TextSelection adjustSelection(
+			TextSelection selection,
+			TextSelectType type) const override {
 		return _caption.adjustSelection(selection, type);
 	}
 	uint16 fullSelectionLength() const override {
@@ -795,7 +803,9 @@ public:
 	void draw(Painter &p, const QRect &r, TextSelection selection, TimeMs ms) const override;
 	HistoryTextState getState(QPoint point, HistoryStateRequest request) const override;
 
-	TextSelection adjustSelection(TextSelection selection, TextSelectType type) const override WARN_UNUSED_RESULT;
+	[[nodiscard]] TextSelection adjustSelection(
+		TextSelection selection,
+		TextSelectType type) const override;
 	uint16 fullSelectionLength() const override {
 		return _title.length() + _description.length();
 	}
@@ -902,7 +912,9 @@ public:
 	void draw(Painter &p, const QRect &r, TextSelection selection, TimeMs ms) const override;
 	HistoryTextState getState(QPoint point, HistoryStateRequest request) const override;
 
-	TextSelection adjustSelection(TextSelection selection, TextSelectType type) const override WARN_UNUSED_RESULT;
+	[[nodiscard]] TextSelection adjustSelection(
+		TextSelection selection,
+		TextSelectType type) const override;
 	uint16 fullSelectionLength() const override {
 		return _title.length() + _description.length();
 	}
@@ -1016,7 +1028,9 @@ public:
 	void draw(Painter &p, const QRect &r, TextSelection selection, TimeMs ms) const override;
 	HistoryTextState getState(QPoint point, HistoryStateRequest request) const override;
 
-	TextSelection adjustSelection(TextSelection selection, TextSelectType type) const override WARN_UNUSED_RESULT;
+	[[nodiscard]] TextSelection adjustSelection(
+		TextSelection selection,
+		TextSelectType type) const override;
 	uint16 fullSelectionLength() const override {
 		return _title.length() + _description.length();
 	}
@@ -1102,7 +1116,9 @@ public:
 	void draw(Painter &p, const QRect &r, TextSelection selection, TimeMs ms) const override;
 	HistoryTextState getState(QPoint point, HistoryStateRequest request) const override;
 
-	TextSelection adjustSelection(TextSelection selection, TextSelectType type) const override WARN_UNUSED_RESULT;
+	[[nodiscard]] TextSelection adjustSelection(
+		TextSelection selection,
+		TextSelectType type) const override;
 	uint16 fullSelectionLength() const override {
 		return _title.length() + _description.length();
 	}

Telegram/SourceFiles/history/history_service.h

@@ -88,7 +88,9 @@ public:
 	bool hasPoint(QPoint point) const override;
 	HistoryTextState getState(QPoint point, HistoryStateRequest request) const override;
 
-	TextSelection adjustSelection(TextSelection selection, TextSelectType type) const override WARN_UNUSED_RESULT {
+	[[nodiscard]] TextSelection adjustSelection(
+			TextSelection selection,
+			TextSelectType type) const override {
 		return _text.adjustSelection(selection, type);
 	}
 

Telegram/SourceFiles/info/media/info_media_list_widget.h

@@ -66,6 +66,18 @@ public:
 	rpl::producer<int> scrollToRequests() const {
 		return _scrollToRequests.events();
 	}
+	struct SelectedItem {
+		explicit SelectedItem(FullMsgId msgId) : msgId(msgId) {
+		}
+
+		FullMsgId msgId;
+		bool canDelete = false;
+		bool canForward = false;
+	};
+	using SelectedItems = std::vector<SelectedItem>;
+	rpl::producer<SelectedItems> selectedItemsValue() const {
+		return _selectedItemsStream.events();
+	}
 
 	~ListWidget();
 
@@ -98,19 +110,51 @@ private:
 		std::unique_ptr<BaseLayout> item;
 		bool stale = false;
 	};
+	struct Context;
 	class Section;
 	struct FoundItem {
 		not_null<BaseLayout*> layout;
 		QRect geometry;
 		bool exact = false;
 	};
+	struct SelectionData {
+		explicit SelectionData(TextSelection text) : text(text) {
+		}
+
+		TextSelection text;
+		bool canDelete = false;
+		bool canForward = false;
+	};
+	using SelectedMap = base::flat_map<
+		UniversalMsgId,
+		SelectionData,
+		std::less<>>;
+	enum class DragSelectAction {
+		None,
+		Selecting,
+		Deselecting,
+	};
+	struct CursorState {
+		UniversalMsgId itemId = 0;
+		QSize size;
+		QPoint cursor;
+		bool inside = false;
+
+		inline bool operator==(const CursorState &other) const {
+			return (itemId == other.itemId)
+				&& (cursor == other.cursor);
+		}
+		inline bool operator!=(const CursorState &other) const {
+			return !(*this == other);
+		}
+
+	};
 
 	void start();
 	int recountHeight();
 	void refreshHeight();
 
 	QMargins padding() const;
-	void updateSelected();
 	bool isMyItem(not_null<const HistoryItem*> item) const;
 	bool isItemLayout(
 		not_null<const HistoryItem*> item,
@@ -118,6 +162,7 @@ private:
 	void repaintItem(const HistoryItem *item);
 	void repaintItem(UniversalMsgId msgId);
 	void repaintItem(const BaseLayout *item);
+	void repaintItem(QRect itemGeometry);
 	void itemRemoved(not_null<const HistoryItem*> item);
 	void itemLayoutChanged(not_null<const HistoryItem*> item);
 
@@ -126,12 +171,46 @@ private:
 	void refreshRows();
 	SharedMediaMergedSlice::Key sliceKey(
 		UniversalMsgId universalId) const;
-	BaseLayout *getLayout(const FullMsgId &itemId);
-	BaseLayout *getExistingLayout(const FullMsgId &itemId) const;
+	BaseLayout *getLayout(UniversalMsgId universalId);
+	BaseLayout *getExistingLayout(UniversalMsgId universalId) const;
 	std::unique_ptr<BaseLayout> createLayout(
-		const FullMsgId &itemId,
+		UniversalMsgId universalId,
 		Type type);
 
+	SelectedItems collectSelectedItems() const;
+	void pushSelectedItems();
+	FullMsgId computeFullId(UniversalMsgId universalId) const;
+	bool hasSelected() const;
+	bool isSelectedItem(
+		const SelectedMap::const_iterator &i) const;
+	void removeItemSelection(
+		const SelectedMap::const_iterator &i);
+	bool hasSelectedText() const;
+	bool hasSelectedItems() const;
+	void clearSelected();
+	void applyItemSelection(
+		UniversalMsgId universalId,
+		TextSelection selection);
+	void toggleItemSelection(
+		UniversalMsgId universalId);
+	SelectedMap::iterator itemUnderPressSelection();
+	SelectedMap::const_iterator itemUnderPressSelection() const;
+	bool isItemUnderPressSelected() const;
+	bool requiredToStartDragging(not_null<BaseLayout*> layout) const;
+	bool isPressInSelectedText(HistoryTextState state) const;
+	void applyDragSelection();
+	void applyDragSelection(SelectedMap &applyTo) const;
+	bool changeItemSelection(
+		SelectedMap &selected,
+		UniversalMsgId universalId,
+		TextSelection selection) const;
+
+	static bool IsAfter(
+		const CursorState &a,
+		const CursorState &b);
+	static bool SkipSelectFromItem(const CursorState &state);
+	static bool SkipSelectTillItem(const CursorState &state);
+
 	void markLayoutsStale();
 	void clearStaleLayouts();
 	std::vector<Section>::iterator findSectionByItem(
@@ -157,11 +236,25 @@ private:
 		const QPoint &screenPos,
 		Qt::MouseButton button);
 	void mouseActionUpdate(const QPoint &screenPos);
+	void mouseActionUpdate();
 	void mouseActionFinish(
 		const QPoint &screenPos,
 		Qt::MouseButton button);
 	void mouseActionCancel();
 	void performDrag();
+	style::cursor computeMouseCursor() const;
+
+	void updateDragSelection();
+	void clearDragSelection();
+	void setDragSelection(
+		BaseLayout *dragSelectFrom,
+		BaseLayout *dragSelectTill,
+		DragSelectAction action);
+
+	void trySwitchToWordSelection();
+	void switchToWordSelection();
+	void validateTrippleClickStartTime();
+	void checkMoveToOtherViewer();
 
 	not_null<Window::Controller*> _controller;
 	not_null<PeerData*> _peer;
@@ -183,29 +276,24 @@ private:
 
 	MouseAction _mouseAction = MouseAction::None;
 	TextSelectType _mouseSelectType = TextSelectType::Letters;
-	QPoint _dragStartPosition;
 	QPoint _mousePosition;
-	BaseLayout *_itemNearestToCursor = nullptr;
-	BaseLayout *_itemUnderCursor = nullptr;
-	BaseLayout *_itemUnderPress = nullptr;
+	CursorState _overState;
+	CursorState _pressState;
+	BaseLayout *_overLayout = nullptr;
 	HistoryCursorState _mouseCursorState = HistoryDefaultCursorState;
-//	uint16 _mouseTextSymbol = 0;
+	uint16 _mouseTextSymbol = 0;
 	bool _pressWasInactive = false;
-	using SelectedItems = std::map<
-		UniversalMsgId,
-		TextSelection,
-		std::less<>>;
-	SelectedItems _selected;
+	SelectedMap _selected;
+	SelectedMap _dragSelected;
+	rpl::event_stream<SelectedItems> _selectedItemsStream;
 	style::cursor _cursor = style::cur_default;
-	BaseLayout *_dragSelFrom = nullptr;
-	BaseLayout *_dragSelTo = nullptr;
-//	bool _dragSelecting = false;
+	DragSelectAction _dragSelectAction = DragSelectAction::None;
 	bool _wasSelectedText = false; // was some text selected in current drag action
 	Ui::PopupMenu *_contextMenu = nullptr;
 	ClickHandlerPtr _contextMenuLink;
 
 	QPoint _trippleClickPoint;
-	QTimer _trippleClickTimer;
+	TimeMs _trippleClickStartTime = 0;
 
 	rpl::lifetime _viewerLifetime;
 

Telegram/SourceFiles/inline_bots/inline_bot_layout_internal.cpp

@@ -213,14 +213,17 @@ void Gif::paint(Painter &p, const QRect &clip, const PaintContext *context) cons
 	}
 }
 
-void Gif::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState Gif::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	if (QRect(0, 0, _width, st::inlineMediaHeight).contains(point)) {
 		if (_delete && rtlpoint(point, _width).x() >= _width - st::stickerPanDeleteIconBg.width() && point.y() < st::stickerPanDeleteIconBg.height()) {
-			link = _delete;
+			return _delete;
 		} else {
-			link = _send;
+			return _send;
 		}
 	}
+	return {};
 }
 
 void Gif::clickHandlerActiveChanged(const ClickHandlerPtr &p, bool active) {
@@ -404,10 +407,13 @@ void Sticker::paint(Painter &p, const QRect &clip, const PaintContext *context)
 	}
 }
 
-void Sticker::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState Sticker::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	if (QRect(0, 0, _width, st::inlineMediaHeight).contains(point)) {
-		link = _send;
+		return _send;
 	}
+	return {};
 }
 
 void Sticker::clickHandlerActiveChanged(const ClickHandlerPtr &p, bool active) {
@@ -491,10 +497,13 @@ void Photo::paint(Painter &p, const QRect &clip, const PaintContext *context) co
 	}
 }
 
-void Photo::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState Photo::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	if (QRect(0, 0, _width, st::inlineMediaHeight).contains(point)) {
-		link = _send;
+		return _send;
 	}
+	return {};
 }
 
 PhotoData *Photo::getShownPhoto() const {
@@ -633,15 +642,16 @@ void Video::paint(Painter &p, const QRect &clip, const PaintContext *context) co
 	}
 }
 
-void Video::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState Video::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	if (QRect(0, st::inlineRowMargin, st::inlineThumbSize, st::inlineThumbSize).contains(point)) {
-		link = _link;
-		return;
+		return _link;
 	}
 	if (QRect(st::inlineThumbSize + st::inlineThumbSkip, 0, _width - st::inlineThumbSize - st::inlineThumbSkip, _height).contains(point)) {
-		link = _send;
-		return;
+		return _send;
 	}
+	return {};
 }
 
 void Video::prepareThumb(int32 width, int32 height) const {
@@ -773,16 +783,18 @@ void File::paint(Painter &p, const QRect &clip, const PaintContext *context) con
 	}
 }
 
-void File::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState File::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	if (QRect(0, st::inlineRowMargin, st::msgFileSize, st::msgFileSize).contains(point)) {
-		link = getShownDocument()->loading() ? _cancel : _open;
-		return;
-	}
-	auto left = st::msgFileSize + st::inlineThumbSkip;
-	if (QRect(left, 0, _width - left, _height).contains(point)) {
-		link = _send;
-		return;
+		return getShownDocument()->loading() ? _cancel : _open;
+	} else {
+		auto left = st::msgFileSize + st::inlineThumbSkip;
+		if (QRect(left, 0, _width - left, _height).contains(point)) {
+			return _send;
+		}
 	}
+	return {};
 }
 
 void File::clickHandlerActiveChanged(const ClickHandlerPtr &p, bool active) {
@@ -933,15 +945,16 @@ void Contact::paint(Painter &p, const QRect &clip, const PaintContext *context)
 	}
 }
 
-void Contact::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
-	if (QRect(0, st::inlineRowMargin, st::msgFileSize, st::inlineThumbSize).contains(point)) {
-		return;
-	}
-	auto left = (st::msgFileSize + st::inlineThumbSkip);
-	if (QRect(left, 0, _width - left, _height).contains(point)) {
-		link = _send;
-		return;
+HistoryTextState Contact::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
+	if (!QRect(0, st::inlineRowMargin, st::msgFileSize, st::inlineThumbSize).contains(point)) {
+		auto left = (st::msgFileSize + st::inlineThumbSkip);
+		if (QRect(left, 0, _width - left, _height).contains(point)) {
+			return _send;
+		}
 	}
+	return {};
 }
 
 void Contact::prepareThumb(int width, int height) const {
@@ -1069,10 +1082,11 @@ void Article::paint(Painter &p, const QRect &clip, const PaintContext *context)
 	}
 }
 
-void Article::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState Article::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	if (_withThumb && QRect(0, st::inlineRowMargin, st::inlineThumbSize, st::inlineThumbSize).contains(point)) {
-		link = _link;
-		return;
+		return _link;
 	}
 	auto left = _withThumb ? (st::inlineThumbSize + st::inlineThumbSkip) : 0;
 	if (QRect(left, 0, _width - left, _height).contains(point)) {
@@ -1082,13 +1096,12 @@ void Article::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint
 			auto descriptionLines = 2;
 			auto descriptionHeight = qMin(_description.countHeight(_width - left), st::normalFont->height * descriptionLines);
 			if (rtlrect(left, st::inlineRowMargin + titleHeight + descriptionHeight, _urlWidth, st::normalFont->height, _width).contains(point)) {
-				link = _url;
-				return;
+				return _url;
 			}
 		}
-		link = _send;
-		return;
+		return _send;
 	}
+	return {};
 }
 
 void Article::prepareThumb(int width, int height) const {
@@ -1253,16 +1266,17 @@ void Game::paint(Painter &p, const QRect &clip, const PaintContext *context) con
 	}
 }
 
-void Game::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState Game::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	int left = st::inlineThumbSize + st::inlineThumbSkip;
 	if (QRect(0, st::inlineRowMargin, st::inlineThumbSize, st::inlineThumbSize).contains(point)) {
-		link = _send;
-		return;
+		return _send;
 	}
 	if (QRect(left, 0, _width - left, _height).contains(point)) {
-		link = _send;
-		return;
+		return _send;
 	}
+	return {};
 }
 
 void Game::prepareThumb(int width, int height) const {

Telegram/SourceFiles/inline_bots/inline_bot_layout_internal.h

@@ -73,7 +73,9 @@ public:
 	}
 
 	void paint(Painter &p, const QRect &clip, const PaintContext *context) const override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 	// ClickHandlerHost interface
 	void clickHandlerActiveChanged(const ClickHandlerPtr &p, bool active) override;
@@ -130,7 +132,9 @@ public:
 	}
 
 	void paint(Painter &p, const QRect &clip, const PaintContext *context) const override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 private:
 	PhotoData *getShownPhoto() const;
@@ -160,7 +164,9 @@ public:
 	void preload() const override;
 
 	void paint(Painter &p, const QRect &clip, const PaintContext *context) const override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 	// ClickHandlerHost interface
 	void clickHandlerActiveChanged(const ClickHandlerPtr &p, bool active) override;
@@ -184,7 +190,9 @@ public:
 	void initDimensions() override;
 
 	void paint(Painter &p, const QRect &clip, const PaintContext *context) const override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 private:
 	ClickHandlerPtr _link;
@@ -231,7 +239,9 @@ public:
 	void initDimensions() override;
 
 	void paint(Painter &p, const QRect &clip, const PaintContext *context) const override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 	// ClickHandlerHost interface
 	void clickHandlerActiveChanged(const ClickHandlerPtr &p, bool active) override;
@@ -294,7 +304,9 @@ public:
 	int resizeGetHeight(int width) override;
 
 	void paint(Painter &p, const QRect &clip, const PaintContext *context) const override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 private:
 	mutable QPixmap _thumb;
@@ -312,7 +324,9 @@ public:
 	int resizeGetHeight(int width) override;
 
 	void paint(Painter &p, const QRect &clip, const PaintContext *context) const override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 private:
 	ClickHandlerPtr _url, _link;
@@ -335,7 +349,9 @@ public:
 	void initDimensions() override;
 
 	void paint(Painter &p, const QRect &clip, const PaintContext *context) const override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 private:
 	void countFrameSize();

Telegram/SourceFiles/inline_bots/inline_results_widget.cpp

@@ -644,8 +644,10 @@ void Inner::updateSelected() {
 		}
 		if (col < inlineItems.size()) {
 			sel = row * MatrixRowShift + col;
-			inlineItems.at(col)->getState(lnk, cursor, QPoint(sx, sy));
-			lnkhost = inlineItems.at(col);
+			auto result = inlineItems[col]->getState(QPoint(sx, sy), HistoryStateRequest());
+			lnk = result.link;
+			cursor = result.cursor;
+			lnkhost = inlineItems[col];
 		} else {
 			row = col = -1;
 		}

Telegram/SourceFiles/layout.h

@@ -119,14 +119,15 @@ public:
 		return _height;
 	}
 
-	virtual void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
-		link.clear();
-		cursor = HistoryDefaultCursorState;
+	[[nodiscard]] virtual HistoryTextState getState(
+			QPoint point,
+			HistoryStateRequest request) const {
+		return {};
 	}
-	virtual void getSymbol(uint16 &symbol, bool &after, bool &upon, QPoint point) const { // from text
-		upon = hasPoint(point);
-		symbol = upon ? 0xFFFF : 0;
-		after = false;
+	[[nodiscard]] virtual TextSelection adjustSelection(
+			TextSelection selection,
+			TextSelectType type) const {
+		return selection;
 	}
 
 	int width() const {

Telegram/SourceFiles/media/player/media_player_list.cpp

@@ -104,7 +104,9 @@ void ListWidget::mouseMoveEvent(QMouseEvent *e) {
 			if (y <= m.y()) {
 				if (auto media = layout->toMediaItem()) {
 					item = media->getItem();
-					media->getState(lnk, cursorState, m - QPoint(0, y));
+					auto result = media->getState(m - QPoint(0, y), HistoryStateRequest());
+					lnk = result.link;
+					cursorState = result.cursor;
 					lnkhost = media;
 				}
 			}

Telegram/SourceFiles/mediaview.cpp

@@ -1153,7 +1153,11 @@ void MediaView::refreshMediaViewer() {
 }
 
 void MediaView::showPhoto(not_null<PhotoData*> photo, HistoryItem *context) {
-	setContext(context);
+	if (context) {
+		setContext(context);
+	} else {
+		setContext(base::none);
+	}
 
 	_firstOpenedPeerPhoto = false;
 	_saveMsgStarted = 0;

Telegram/SourceFiles/mtproto/sender.h

@@ -214,39 +214,39 @@ public:
 		SpecificRequestBuilder(SpecificRequestBuilder &&other) = default;
 
 	public:
-		SpecificRequestBuilder &toDC(ShiftedDcId dcId) noexcept WARN_UNUSED_RESULT {
+		[[nodiscard]] SpecificRequestBuilder &toDC(ShiftedDcId dcId) noexcept {
 			setToDC(dcId);
 			return *this;
 		}
-		SpecificRequestBuilder &canWait(TimeMs ms) noexcept WARN_UNUSED_RESULT {
+		[[nodiscard]] SpecificRequestBuilder &canWait(TimeMs ms) noexcept {
 			setCanWait(ms);
 			return *this;
 		}
-		SpecificRequestBuilder &done(base::lambda_once<void(const typename Request::ResponseType &result)> callback) WARN_UNUSED_RESULT {
+		[[nodiscard]] SpecificRequestBuilder &done(base::lambda_once<void(const typename Request::ResponseType &result)> callback) {
 			setDoneHandler(MakeShared<DoneHandler<typename Request::ResponseType, DonePlainPolicy>>(sender(), std::move(callback)));
 			return *this;
 		}
-		SpecificRequestBuilder &done(base::lambda_once<void(const typename Request::ResponseType &result, mtpRequestId requestId)> callback) WARN_UNUSED_RESULT {
+		[[nodiscard]] SpecificRequestBuilder &done(base::lambda_once<void(const typename Request::ResponseType &result, mtpRequestId requestId)> callback) {
 			setDoneHandler(MakeShared<DoneHandler<typename Request::ResponseType, DoneRequestIdPolicy>>(sender(), std::move(callback)));
 			return *this;
 		}
-		SpecificRequestBuilder &fail(base::lambda_once<void(const RPCError &error)> callback) noexcept WARN_UNUSED_RESULT {
+		[[nodiscard]] SpecificRequestBuilder &fail(base::lambda_once<void(const RPCError &error)> callback) noexcept {
 			setFailHandler(std::move(callback));
 			return *this;
 		}
-		SpecificRequestBuilder &fail(base::lambda_once<void(const RPCError &error, mtpRequestId requestId)> callback) noexcept WARN_UNUSED_RESULT {
+		[[nodiscard]] SpecificRequestBuilder &fail(base::lambda_once<void(const RPCError &error, mtpRequestId requestId)> callback) noexcept {
 			setFailHandler(std::move(callback));
 			return *this;
 		}
-		SpecificRequestBuilder &handleFloodErrors() noexcept WARN_UNUSED_RESULT {
+		[[nodiscard]] SpecificRequestBuilder &handleFloodErrors() noexcept {
 			setFailSkipPolicy(FailSkipPolicy::HandleFlood);
 			return *this;
 		}
-		SpecificRequestBuilder &handleAllErrors() noexcept WARN_UNUSED_RESULT {
+		[[nodiscard]] SpecificRequestBuilder &handleAllErrors() noexcept {
 			setFailSkipPolicy(FailSkipPolicy::HandleAll);
 			return *this;
 		}
-		SpecificRequestBuilder &after(mtpRequestId requestId) noexcept WARN_UNUSED_RESULT {
+		[[nodiscard]] SpecificRequestBuilder &after(mtpRequestId requestId) noexcept {
 			setAfter(requestId);
 			return *this;
 		}
@@ -280,11 +280,11 @@ public:
 	};
 
 	template <typename Request, typename = std::enable_if_t<std::is_rvalue_reference<Request&&>::value>, typename = typename Request::Unboxed>
-	SpecificRequestBuilder<Request> request(Request &&request) noexcept WARN_UNUSED_RESULT;
+	[[nodiscard]] SpecificRequestBuilder<Request> request(Request &&request) noexcept;
 
-	SentRequestWrap request(mtpRequestId requestId) noexcept WARN_UNUSED_RESULT;
+	[[nodiscard]] SentRequestWrap request(mtpRequestId requestId) noexcept;
 
-	decltype(auto) requestCanceller() noexcept WARN_UNUSED_RESULT {
+	[[nodiscard]] decltype(auto) requestCanceller() noexcept {
 		return [this](mtpRequestId requestId) {
 			request(requestId).cancel();
 		};

Telegram/SourceFiles/overview/overview_layout.cpp

@@ -66,12 +66,16 @@ TextWithEntities ComposeNameWithEntities(DocumentData *document) {
 
 } // namespace
 
-void ItemBase::clickHandlerActiveChanged(const ClickHandlerPtr &action, bool active) {
+void ItemBase::clickHandlerActiveChanged(
+		const ClickHandlerPtr &action,
+		bool active) {
 	App::hoveredLinkItem(active ? _parent.get() : nullptr);
 	Auth().data().requestItemRepaint(_parent);
 }
 
-void ItemBase::clickHandlerPressedChanged(const ClickHandlerPtr &action, bool pressed) {
+void ItemBase::clickHandlerPressedChanged(
+		const ClickHandlerPtr &action,
+		bool pressed) {
 	App::pressedLinkItem(pressed ? _parent.get() : nullptr);
 	Auth().data().requestItemRepaint(_parent);
 }
@@ -306,10 +310,13 @@ void Photo::ensureCheckboxCreated() {
 	});
 }
 
-void Photo::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState Photo::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	if (hasPoint(point)) {
-		link = _link;
+		return _link;
 	}
+	return {};
 }
 
 void Photo::clickHandlerActiveChanged(const ClickHandlerPtr &action, bool active) {
@@ -506,12 +513,15 @@ bool Video::iconAnimated() const {
 	return true;
 }
 
-void Video::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState Video::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	bool loaded = _data->loaded();
 
 	if (hasPoint(point)) {
-		link = loaded ? _openl : (_data->loading() ? _cancell : _savel);
+		return loaded ? _openl : (_data->loading() ? _cancell : _savel);
 	}
+	return {};
 }
 
 void Video::updateStatusText() {
@@ -664,7 +674,9 @@ void Voice::paint(Painter &p, const QRect &clip, TextSelection selection, const
 	}
 }
 
-void Voice::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState Voice::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	bool loaded = _data->loaded();
 
 	int32 nameleft = 0, nametop = 0, nameright = 0, statustop = 0, datetop = 0;
@@ -676,20 +688,20 @@ void Voice::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint p
 
 	auto inner = rtlrect(_st.songPadding.left(), _st.songPadding.top(), _st.songThumbSize, _st.songThumbSize, _width);
 	if (inner.contains(point)) {
-		link = loaded ? _openl : ((_data->loading() || _data->status == FileUploading) ? _cancell : _openl);
-		return;
+		return loaded ? _openl : ((_data->loading() || _data->status == FileUploading) ? _cancell : _openl);
 	}
+	auto result = HistoryTextState();
 	if (rtlrect(nameleft, statustop, _width - nameleft - nameright, st::normalFont->height, _width).contains(point)) {
 		if (_status.size() == FileStatusSizeLoaded || _status.size() == FileStatusSizeReady) {
 			auto textState = _details.getStateLeft(point - QPoint(nameleft, statustop), _width, _width);
-			link = textState.link;
-			cursor = textState.uponSymbol ? HistoryInTextCursorState : HistoryDefaultCursorState;
+			result.link = textState.link;
+			result.cursor = textState.uponSymbol ? HistoryInTextCursorState : HistoryDefaultCursorState;
 		}
 	}
-	if (hasPoint(point) && !link && !_data->loading()) {
-		link = _namel;
-		return;
+	if (hasPoint(point) && !result.link && !_data->loading()) {
+		return _namel;
 	}
+	return result;
 }
 
 float64 Voice::dataProgress() const {
@@ -954,7 +966,9 @@ void Document::paint(Painter &p, const QRect &clip, TextSelection selection, con
 	}
 }
 
-void Document::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState Document::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	bool loaded = _data->loaded() || Local::willStickerImageLoad(_data->mediaKey());
 
 	int32 nameleft = 0, nametop = 0, nameright = 0, statustop = 0, datetop = 0;
@@ -968,12 +982,10 @@ void Document::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoin
 
 		auto inner = rtlrect(_st.songPadding.left(), _st.songPadding.top(), _st.songThumbSize, _st.songThumbSize, _width);
 		if (inner.contains(point)) {
-			link = loaded ? _openl : ((_data->loading() || _data->status == FileUploading) ? _cancell : _openl);
-			return;
+			return loaded ? _openl : ((_data->loading() || _data->status == FileUploading) ? _cancell : _openl);
 		}
 		if (hasPoint(point) && !_data->loading()) {
-			link = _namel;
-			return;
+			return _namel;
 		}
 	} else {
 		nameleft = _st.fileThumbSize + _st.filePadding.right();
@@ -984,27 +996,24 @@ void Document::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoin
 		auto rthumb = rtlrect(0, st::linksBorder + _st.filePadding.top(), _st.fileThumbSize, _st.fileThumbSize, _width);
 
 		if (rthumb.contains(point)) {
-			link = loaded ? _openl : ((_data->loading() || _data->status == FileUploading) ? _cancell : _savel);
-			return;
+			return loaded ? _openl : ((_data->loading() || _data->status == FileUploading) ? _cancell : _savel);
 		}
 
 		if (_data->status != FileUploadFailed) {
 			if (rtlrect(nameleft, datetop, _datew, st::normalFont->height, _width).contains(point)) {
-				link = _msgl;
-				return;
+				return _msgl;
 			}
 		}
 		if (!_data->loading() && _data->isValid()) {
 			if (loaded && rtlrect(0, st::linksBorder, nameleft, _height - st::linksBorder, _width).contains(point)) {
-				link = _namel;
-				return;
+				return _namel;
 			}
 			if (rtlrect(nameleft, nametop, qMin(_width - nameleft - nameright, _name.maxWidth()), st::semiboldFont->height, _width).contains(point)) {
-				link = _namel;
-				return;
+				return _namel;
 			}
 		}
 	}
+	return {};
 }
 
 float64 Document::dataProgress() const {
@@ -1301,11 +1310,12 @@ void Link::paint(Painter &p, const QRect &clip, TextSelection selection, const P
 	}
 }
 
-void Link::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const {
+HistoryTextState Link::getState(
+		QPoint point,
+		HistoryStateRequest request) const {
 	int32 left = st::linksPhotoSize + st::linksPhotoPadding, top = st::linksMargin.top() + st::linksBorder, w = _width - left;
 	if (rtlrect(0, top, st::linksPhotoSize, st::linksPhotoSize, _width).contains(point)) {
-		link = _photol;
-		return;
+		return _photol;
 	}
 
 	if (!_title.isEmpty() && _text.isEmpty() && _links.size() == 1) {
@@ -1313,8 +1323,7 @@ void Link::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint po
 	}
 	if (!_title.isEmpty()) {
 		if (rtlrect(left, top, qMin(w, _titlew), st::semiboldFont->height, _width).contains(point)) {
-			link = _photol;
-			return;
+			return _photol;
 		}
 		top += st::webPageTitleFont->height;
 	}
@@ -1323,11 +1332,11 @@ void Link::getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint po
 	}
 	for (int32 i = 0, l = _links.size(); i < l; ++i) {
 		if (rtlrect(left, top, qMin(w, _links.at(i).width), st::normalFont->height, _width).contains(point)) {
-			link = _links.at(i).lnk;
-			return;
+			return _links.at(i).lnk;
 		}
 		top += st::normalFont->height;
 	}
+	return {};
 }
 
 Link::LinkEntry::LinkEntry(const QString &url, const QString &text)

Telegram/SourceFiles/overview/overview_layout.h

@@ -189,7 +189,9 @@ public:
 	void initDimensions() override;
 	int32 resizeGetHeight(int32 width) override;
 	void paint(Painter &p, const QRect &clip, TextSelection selection, const PaintContext *context) override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 	void clickHandlerActiveChanged(const ClickHandlerPtr &action, bool active) override;
 	void clickHandlerPressedChanged(const ClickHandlerPtr &action, bool pressed) override;
@@ -220,7 +222,9 @@ public:
 	void initDimensions() override;
 	int32 resizeGetHeight(int32 width) override;
 	void paint(Painter &p, const QRect &clip, TextSelection selection, const PaintContext *context) override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 	void clickHandlerActiveChanged(const ClickHandlerPtr &action, bool active) override;
 	void clickHandlerPressedChanged(const ClickHandlerPtr &action, bool pressed) override;
@@ -260,7 +264,9 @@ public:
 
 	void initDimensions() override;
 	void paint(Painter &p, const QRect &clip, TextSelection selection, const PaintContext *context) override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 protected:
 	float64 dataProgress() const override;
@@ -292,7 +298,9 @@ public:
 
 	void initDimensions() override;
 	void paint(Painter &p, const QRect &clip, TextSelection selection, const PaintContext *context) override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 	virtual DocumentData *getDocument() const override {
 		return _data;
@@ -333,7 +341,9 @@ public:
 	void initDimensions() override;
 	int32 resizeGetHeight(int32 width) override;
 	void paint(Painter &p, const QRect &clip, TextSelection selection, const PaintContext *context) override;
-	void getState(ClickHandlerPtr &link, HistoryCursorState &cursor, QPoint point) const override;
+	HistoryTextState getState(
+		QPoint point,
+		HistoryStateRequest request) const override;
 
 private:
 	ClickHandlerPtr _photol;

Telegram/SourceFiles/overviewwidget.cpp

@@ -900,7 +900,9 @@ void OverviewInner::onUpdateSelected() {
 				item = media->getItem();
 				index = i;
 				if (upon) {
-					media->getState(lnk, cursorState, m - QPoint(col * w + st::overviewPhotoSkip, _marginTop + row * vsize + st::overviewPhotoSkip));
+					auto result = media->getState(m - QPoint(col * w + st::overviewPhotoSkip, _marginTop + row * vsize + st::overviewPhotoSkip), HistoryStateRequest());
+					lnk = result.link;
+					cursorState = result.cursor;
 					lnkhost = media;
 				}
 			}
@@ -936,7 +938,9 @@ void OverviewInner::onUpdateSelected() {
 				if (auto media = _items.at(i)->toMediaItem()) {
 					item = media->getItem();
 					index = i;
-					media->getState(lnk, cursorState, m - QPoint(_rowsLeft, _marginTop + top));
+					auto result = media->getState(m - QPoint(_rowsLeft, _marginTop + top), HistoryStateRequest());
+					lnk = result.link;
+					cursorState = result.cursor;
 					lnkhost = media;
 				}
 				break;

Telegram/SourceFiles/ui/text/text.h

@@ -165,7 +165,7 @@ public:
 		return getStateElided(rtlpoint(point, outerw), width, request);
 	}
 
-	TextSelection adjustSelection(TextSelection selection, TextSelectType selectType) const WARN_UNUSED_RESULT;
+	[[nodiscard]] TextSelection adjustSelection(TextSelection selection, TextSelectType selectType) const;
 	bool isFullSelection(TextSelection selection) const {
 		return (selection.from == 0) && (selection.to >= _text.size());
 	}