Simplify paid message button labeling.

Telegram/SourceFiles/boxes/create_poll_box.cpp

@@ -1230,16 +1230,9 @@ object_ptr<Ui::RpWidget> CreatePollBox::setupContent() {
 	const auto submit = addButton(
 		tr::lng_polls_create_button(),
 		[=] { isNormal ? send({}) : schedule(); });
-	submit->setText(_starsRequired.value() | rpl::map([=](int stars) {
+	submit->setText(PaidSendButtonText(_starsRequired.value(), isNormal
-		using namespace Ui;
+		? tr::lng_polls_create_button()
-		if (!stars) {
+		: tr::lng_schedule_button()));
-			return (isNormal
-				? tr::lng_polls_create_button
-				: tr::lng_schedule_button)(tr::now, Text::WithEntities);
-		}
-		return Text::IconEmoji(&st::boxStarIconEmoji).append(
-			Lang::FormatCountToShort(stars).string);
-	}));
 	const auto sendMenuDetails = [=] {
 		collectError();
 		return (*error) ? SendMenu::Details() : _sendMenuDetails();

Telegram/SourceFiles/boxes/send_files_box.cpp

@@ -740,12 +740,8 @@ void SendFilesBox::refreshButtons() {
 		? _captionToPeer->starsPerMessageChecked()
 		: 0;
 	if (perMessage > 0) {
-		_send->setText(_messagesCount.value(
+		_send->setText(PaidSendButtonText(_messagesCount.value(
-		) | rpl::map([=](int count) {
+		) | rpl::map(rpl::mappers::_1 * perMessage)));
-			const auto stars = count * perMessage;
-			return Ui::Text::IconEmoji(&st::boxStarIconEmoji).append(
-				Lang::FormatCountToShort(stars).string);
-		}));
 	}
 	if (_sendType == Api::SendType::Normal) {
 		SendMenu::SetupMenuAndShortcuts(

Telegram/SourceFiles/boxes/share_box.cpp

@@ -620,13 +620,9 @@ void ShareBox::createButtons() {
 				showMenu(send);
 			}
 		}, send->lifetime());
-		send->setText(_starsToSend.value() | rpl::map([=](int stars) {
+		send->setText(PaidSendButtonText(
-			using namespace Ui;
+			_starsToSend.value(),
-			return stars
+			tr::lng_share_confirm()));
-				? Text::IconEmoji(&st::boxStarIconEmoji).append(
-					Lang::FormatCountToShort(stars).string)
-				: tr::lng_share_confirm(tr::now, Text::WithEntities);
-		}));
 	} else if (_descriptor.copyCallback) {
 		addButton(_copyLinkText.value(), [=] { copyLink(); });
 	}

Telegram/SourceFiles/chat_helpers/message_field.cpp

@@ -1280,3 +1280,26 @@ void SelectTextInFieldWithMargins(
 	textCursor.setPosition(selection.to, QTextCursor::KeepAnchor);
 	field->setTextCursor(textCursor);
 }
+
+TextWithEntities PaidSendButtonText(tr::now_t, int stars) {
+	return Ui::Text::IconEmoji(&st::boxStarIconEmoji).append(
+		Lang::FormatCountToShort(stars).string);
+}
+
+rpl::producer<TextWithEntities> PaidSendButtonText(
+		rpl::producer<int> stars,
+		rpl::producer<QString> fallback) {
+	if (fallback) {
+		return rpl::combine(
+			std::move(fallback),
+			std::move(stars)
+		) | rpl::map([=](QString zero, int count) {
+			return count
+				? PaidSendButtonText(tr::now, count)
+				: TextWithEntities{ zero };
+		});
+	}
+	return std::move(stars) | rpl::map([=](int count) {
+		return PaidSendButtonText(tr::now, count);
+	});
+}

Telegram/SourceFiles/chat_helpers/message_field.h

@@ -19,6 +19,10 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include <QtGui/QClipboard>
 
+namespace tr {
+struct now_t;
+} // namespace tr
+
 namespace Main {
 class Session;
 class SessionShow;
@@ -169,3 +173,8 @@ private:
 void SelectTextInFieldWithMargins(
 	not_null<Ui::InputField*> field,
 	const TextSelection &selection);
+
+[[nodiscard]] TextWithEntities PaidSendButtonText(tr::now_t, int stars);
+[[nodiscard]] rpl::producer<TextWithEntities> PaidSendButtonText(
+	rpl::producer<int> stars,
+	rpl::producer<QString> fallback = nullptr);

Telegram/SourceFiles/ui/controls/send_button.cpp

@@ -12,8 +12,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/text/text_utilities.h"
 #include "ui/painter.h"
 #include "ui/ui_utility.h"
+#include "styles/style_boxes.h"
 #include "styles/style_chat_helpers.h"
-#include "styles/style_credits.h" // starIconEmoji
 
 namespace Ui {
 namespace {
@@ -54,7 +54,7 @@ void SendButton::setState(State state) {
 		|| _state.starsToSend != state.starsToSend) {
 		_starsToSendText.setMarkedText(
 			_st.stars.style,
-			Text::IconEmoji(&st::starIconEmoji).append(
+			Text::IconEmoji(&st::boxStarIconEmoji).append(
 				Lang::FormatCountToShort(state.starsToSend).string),
 			kMarkupTextOptions);
 	}

Telegram/SourceFiles/window/window_peer_menu.cpp

@@ -2174,14 +2174,9 @@ object_ptr<Ui::BoxContent> PrepareChooseRecipientBox(
 							onstack({});
 						}
 					});
-				send->setText(state->starsToSend.value(
+				send->setText(PaidSendButtonText(
-				) | rpl::map([=](int stars) {
+					state->starsToSend.value(),
-					using namespace Ui;
+					tr::lng_send_button()));
-					return stars
-						? Text::IconEmoji(&st::boxStarIconEmoji).append(
-							Lang::FormatCountToShort(stars).string)
-						: tr::lng_send_button(tr::now, Text::WithEntities);
-				}));
 			}
 			box->addButton(tr::lng_cancel(), [=] {
 				box->closeBox();
@@ -2729,14 +2724,9 @@ QPointer<Ui::BoxContent> ShowForwardMessagesBox(
 					showMenu(send);
 				}
 			}, send->lifetime());
-			send->setText(state->starsToSend.value(
+			send->setText(PaidSendButtonText(
-			) | rpl::map([=](int stars) {
+				state->starsToSend.value(),
-				using namespace Ui;
+				tr::lng_send_button()));
-				return stars
-					? Text::IconEmoji(&st::boxStarIconEmoji).append(
-						Lang::FormatCountToShort(stars).string)
-					: tr::lng_send_button(tr::now, Text::WithEntities);
-			}));
 		}
 		state->box->addButton(tr::lng_cancel(), [=] {
 			state->box->closeBox();