Added chat theme bubble gradient to all chats.

Telegram/SourceFiles/ui/chat/chat_theme.cpp

@@ -247,8 +247,9 @@ constexpr auto kMinAcceptableContrast = 1.14;// 4.5;
 	}
 }
 
-[[nodiscard]] QImage PrepareBubblesBackground(
-		const ChatThemeBubblesData &data) {
+} // namespace
+
+QImage PrepareBubblesBackground(const ChatThemeBubblesData &data) {
 	if (data.colors.size() < 2) {
 		return QImage();
 	}
@@ -256,8 +257,6 @@ constexpr auto kMinAcceptableContrast = 1.14;// 4.5;
 	return Images::GenerateLinearGradient(QSize(kSize, kSize), data.colors);
 }
 
-} // namespace
-
 bool operator==(const ChatThemeBackground &a, const ChatThemeBackground &b) {
 	return (a.key == b.key)
 		&& (a.prepared.cacheKey() == b.prepared.cacheKey())
@@ -551,7 +550,10 @@ void ChatTheme::setBubblesBackground(QImage image) {
 			: _bubblesBackground.area),
 	});
 	if (!_bubblesBackgroundPattern) {
-		_bubblesBackgroundPattern = PrepareBubblePattern(palette());
+		const auto use = _palette
+			? _palette.get()
+			: style::main_palette::get().get();
+		_bubblesBackgroundPattern = PrepareBubblePattern(use);
 	}
 	_bubblesBackgroundPattern->pixmap = _bubblesBackground.pixmap;
 	// setBubblesBackground called only from background thread.

Telegram/SourceFiles/ui/chat/chat_theme.h

@@ -287,6 +287,8 @@ struct BackgroundImageFields {
 	int rotation);
 [[nodiscard]] ChatThemeBackground PrepareBackgroundImage(
 	const ChatThemeBackgroundData &data);
+[[nodiscard]] QImage PrepareBubblesBackground(
+	const ChatThemeBubblesData &data);
 [[nodiscard]] QImage PrepareGiftSymbol(
 	const std::unique_ptr<Text::CustomEmoji> &emoji);
 

Telegram/SourceFiles/window/themes/window_themes_chat.cpp

@@ -36,7 +36,9 @@ namespace {
 	return result;
 }
 
-[[nodiscard]] std::optional<Data::CloudThemeType> SettingsTypeFor(
+} // namespace
+
+std::optional<Data::CloudThemeType> ChatThemeVariant(
 		const Data::CloudTheme &theme,
 		bool dark) {
 	const auto type = dark
@@ -52,8 +54,6 @@ namespace {
 		: std::nullopt;
 }
 
-} // namespace
-
 Ui::ChatThemeBubblesData PrepareBubblesData(
 		const Data::CloudTheme &theme,
 		Data::CloudThemeType type) {
@@ -71,7 +71,7 @@ Ui::ChatThemeBubblesData PrepareBubblesData(
 std::unique_ptr<Preview> PreviewFromChatTheme(
 		const Data::CloudTheme &theme,
 		bool dark) {
-	const auto used = SettingsTypeFor(theme, dark);
+	const auto used = ChatThemeVariant(theme, dark);
 	if (!used) {
 		return nullptr;
 	}
@@ -110,7 +110,7 @@ void ApplyChatTheme(
 		not_null<SessionController*> controller,
 		const Data::CloudTheme &theme,
 		bool dark) {
-	const auto used = SettingsTypeFor(theme, dark);
+	const auto used = ChatThemeVariant(theme, dark);
 	if (!used) {
 		return;
 	}
@@ -139,7 +139,7 @@ void CheckChatThemeWallPaper(not_null<SessionController*> controller) {
 	if (cloud.emoticon.isEmpty() || cloud.settings.empty()) {
 		return;
 	}
-	const auto used = SettingsTypeFor(cloud, IsNightMode());
+	const auto used = ChatThemeVariant(cloud, IsNightMode());
 	if (!used) {
 		return;
 	}

Telegram/SourceFiles/window/themes/window_themes_chat.h

@@ -21,6 +21,10 @@ namespace Window::Theme {
 
 struct Preview;
 
+[[nodiscard]] std::optional<Data::CloudThemeType> ChatThemeVariant(
+	const Data::CloudTheme &theme,
+	bool dark);
+
 [[nodiscard]] Ui::ChatThemeBubblesData PrepareBubblesData(
 	const Data::CloudTheme &theme,
 	Data::CloudThemeType type);

Telegram/SourceFiles/window/window_session_controller.cpp

@@ -3536,6 +3536,22 @@ void SessionController::pushDefaultChatBackground() {
 		.isPattern = paper.isPattern(),
 		.tile = background->tile(),
 	});
+	const auto &cloud = background->themeObject().cloud;
+	auto bubbles = Ui::ChatThemeBubblesData();
+	if (!cloud.emoticon.isEmpty()) {
+		const auto variant = Theme::ChatThemeVariant(
+			cloud,
+			Theme::IsNightMode());
+		if (variant) {
+			bubbles = Theme::PrepareBubblesData(cloud, *variant);
+		}
+	}
+	if (bubbles.colors != _defaultChatThemeBubblesColors) {
+		_defaultChatThemeBubblesColors = bubbles.colors;
+		_defaultChatTheme->setBubblesBackground(
+			Ui::PrepareBubblesBackground(bubbles));
+		_defaultChatTheme->finishCreateOnMain();
+	}
 }
 
 void SessionController::cacheChatTheme(

Telegram/SourceFiles/window/window_session_controller.h

@@ -864,6 +864,7 @@ private:
 	rpl::event_stream<> _filtersMenuChanged;
 
 	const std::shared_ptr<Ui::ChatTheme> _defaultChatTheme;
+	std::vector<QColor> _defaultChatThemeBubblesColors;
 	base::flat_map<CachedThemeKey, CachedTheme> _customChatThemes;
 	rpl::event_stream<std::shared_ptr<Ui::ChatTheme>> _cachedThemesStream;
 	rpl::event_stream<> _giftSymbolLoaded;