Support custom keyboard placeholders.

Telegram/SourceFiles/chat_helpers/bot_keyboard.cpp

@@ -201,6 +201,7 @@ bool BotKeyboard::updateMarkup(HistoryItem *to, bool force) {
 		if (_wasForMsgId.msg) {
 			_maximizeSize = _singleUse = _forceReply = false;
 			_wasForMsgId = FullMsgId();
+			_placeholder = QString();
 			_impl = nullptr;
 			return true;
 		}
@@ -218,6 +219,12 @@ bool BotKeyboard::updateMarkup(HistoryItem *to, bool force) {
 	_maximizeSize = !(markupFlags & MTPDreplyKeyboardMarkup::Flag::f_resize);
 	_singleUse = _forceReply || (markupFlags & MTPDreplyKeyboardMarkup::Flag::f_single_use);
 
+	if (const auto markup = to->Get<HistoryMessageReplyMarkup>()) {
+		_placeholder = markup->placeholder;
+	} else {
+		_placeholder = QString();
+	}
+
 	_impl = nullptr;
 	if (auto markup = to->Get<HistoryMessageReplyMarkup>()) {
 		if (!markup->rows.empty()) {

Telegram/SourceFiles/chat_helpers/bot_keyboard.h

@@ -31,8 +31,12 @@ public:
 	// With force=true the markup is updated even if it is
 	// already shown for the passed history item.
 	bool updateMarkup(HistoryItem *last, bool force = false);
-	bool hasMarkup() const;
+	[[nodiscard]] bool hasMarkup() const;
-	bool forceReply() const;
+	[[nodiscard]] bool forceReply() const;
+
+	[[nodiscard]] QString placeholder() const {
+		return _placeholder;
+	}
 
 	void step_selected(crl::time ms, bool timer);
 	void resizeToWidth(int newWidth, int maxOuterHeight) {
@@ -40,10 +44,10 @@ public:
 		return TWidget::resizeToWidth(newWidth);
 	}
 
-	bool maximizeSize() const;
+	[[nodiscard]] bool maximizeSize() const;
-	bool singleUse() const;
+	[[nodiscard]] bool singleUse() const;
 
-	FullMsgId forMsgId() const {
+	[[nodiscard]] FullMsgId forMsgId() const {
 		return _wasForMsgId;
 	}
 
@@ -76,6 +80,7 @@ private:
 
 	const not_null<Main::Session*> _session;
 	FullMsgId _wasForMsgId;
+	QString _placeholder;
 	int _height = 0;
 	int _maxOuterHeight = 0;
 	bool _maximizeSize = false;

Telegram/SourceFiles/history/history_item_components.cpp

@@ -934,6 +934,7 @@ void HistoryMessageReplyMarkup::create(const MTPReplyMarkup &markup) {
 	case mtpc_replyKeyboardMarkup: {
 		auto &d = markup.c_replyKeyboardMarkup();
 		flags = d.vflags().v;
+		placeholder = d.vplaceholder() ? qs(*d.vplaceholder()) : QString();
 
 		createFromButtonRows(d.vrows().v);
 	} break;
@@ -941,6 +942,7 @@ void HistoryMessageReplyMarkup::create(const MTPReplyMarkup &markup) {
 	case mtpc_replyInlineMarkup: {
 		auto &d = markup.c_replyInlineMarkup();
 		flags = MTPDreplyKeyboardMarkup::Flags(0) | MTPDreplyKeyboardMarkup_ClientFlag::f_inline;
+		placeholder = QString();
 
 		createFromButtonRows(d.vrows().v);
 	} break;
@@ -948,11 +950,13 @@ void HistoryMessageReplyMarkup::create(const MTPReplyMarkup &markup) {
 	case mtpc_replyKeyboardHide: {
 		auto &d = markup.c_replyKeyboardHide();
 		flags = mtpCastFlags(d.vflags()) | MTPDreplyKeyboardMarkup_ClientFlag::f_zero;
+		placeholder = QString();
 	} break;
 
 	case mtpc_replyKeyboardForceReply: {
 		auto &d = markup.c_replyKeyboardForceReply();
 		flags = mtpCastFlags(d.vflags()) | MTPDreplyKeyboardMarkup_ClientFlag::f_force_reply;
+		placeholder = d.vplaceholder() ? qs(*d.vplaceholder()) : QString();
 	} break;
 	}
 }
@@ -960,6 +964,7 @@ void HistoryMessageReplyMarkup::create(const MTPReplyMarkup &markup) {
 void HistoryMessageReplyMarkup::create(
 		const HistoryMessageReplyMarkup &markup) {
 	flags = markup.flags;
+	placeholder = markup.placeholder;
 	inlineKeyboard = nullptr;
 
 	rows.clear();

Telegram/SourceFiles/history/history_item_components.h

@@ -237,6 +237,7 @@ struct HistoryMessageReplyMarkup : public RuntimeComponent<HistoryMessageReplyMa
 
 	std::vector<std::vector<Button>> rows;
 	MTPDreplyKeyboardMarkup::Flags flags = 0;
+	QString placeholder;
 
 	std::unique_ptr<ReplyKeyboard> inlineKeyboard;
 

Telegram/SourceFiles/history/history_widget.cpp

@@ -217,6 +217,9 @@ HistoryWidget::HistoryWidget(
 	Ui::InputField::Mode::MultiLine,
 	tr::lng_message_ph())
 , _kbScroll(this, st::botKbScroll)
+, _keyboard(_kbScroll->setOwnedWidget(object_ptr<BotKeyboard>(
+	&session(),
+	this)))
 , _membersDropdownShowTimer([=] { showMembersDropdown(); })
 , _scrollTimer([=] { scrollByTimer(); })
 , _saveDraftTimer([=] { saveDraft(); })
@@ -300,10 +303,6 @@ HistoryWidget::HistoryWidget(
 
 	_topBar->hide();
 	_scroll->hide();
-
-	_keyboard = _kbScroll->setOwnedWidget(object_ptr<BotKeyboard>(
-		&session(),
-		this));
 	_kbScroll->hide();
 
 	updateScrollColors();
@@ -3980,6 +3979,7 @@ void HistoryWidget::toggleKeyboard(bool manual) {
 		}
 	}
 	updateControlsGeometry();
+	updateFieldPlaceholder();
 	if (_botKeyboardHide->isHidden() && canWriteMessage() && !_a_show.animating()) {
 		_tabbedSelectorToggle->show();
 	} else {
@@ -4261,6 +4261,9 @@ void HistoryWidget::updateFieldPlaceholder() {
 			return tr::lng_edit_message_text();
 		} else if (!_history) {
 			return tr::lng_message_ph();
+		} else if ((_kbShown || _keyboard->forceReply())
+			&& !_keyboard->placeholder().isEmpty()) {
+			return rpl::single(_keyboard->placeholder());
 		} else if (const auto channel = _history->peer->asChannel()) {
 			if (channel->isBroadcast()) {
 				return session().data().notifySilentPosts(channel)
@@ -4960,7 +4963,9 @@ void HistoryWidget::updateBotKeyboard(History *h, bool force) {
 		changed = _keyboard->updateMarkup(keyboardItem, force);
 	}
 	updateCmdStartShown();
-	if (!changed) return;
+	if (!changed) {
+		return;
+	}
 
 	bool hasMarkup = _keyboard->hasMarkup(), forceReply = _keyboard->forceReply() && (!_replyToId || !_replyEditMsg);
 	if (hasMarkup || forceReply) {
@@ -5025,6 +5030,7 @@ void HistoryWidget::updateBotKeyboard(History *h, bool force) {
 		}
 	}
 	refreshTopBarActiveChat();
+	updateFieldPlaceholder();
 	updateControlsGeometry();
 	update();
 }

Telegram/SourceFiles/history/history_widget.h

@@ -722,7 +722,7 @@ private:
 	bool _kbShown = false;
 	HistoryItem *_kbReplyTo = nullptr;
 	object_ptr<Ui::ScrollArea> _kbScroll;
-	QPointer<BotKeyboard> _keyboard;
+	const not_null<BotKeyboard*> _keyboard;
 
 	object_ptr<Ui::InnerDropdown> _membersDropdown = { nullptr };
 	base::Timer _membersDropdownShowTimer;