Update chat wallpaper from service message.

Telegram/SourceFiles/boxes/background_preview_box.cpp

@@ -21,6 +21,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/ui_utility.h"
 #include "history/history.h"
 #include "history/history_item.h"
+#include "history/history_item_helpers.h"
 #include "history/view/history_view_message.h"
 #include "main/main_session.h"
 #include "apiwrap.h"
@@ -59,6 +60,24 @@ constexpr auto kMaxWallPaperSlugLength = 255;
 	});
 }
 
+[[nodiscard]] AdminLog::OwnedItem GenerateServiceItem(
+		not_null<HistoryView::ElementDelegate*> delegate,
+		not_null<History*> history,
+		const QString &text,
+		bool out) {
+	Expects(history->peer->isUser());
+
+	const auto flags = MessageFlag::FakeHistoryItem
+		| MessageFlag::HasFromId
+		| (out ? MessageFlag::Outgoing : MessageFlag(0));
+	const auto item = history->makeMessage(
+		history->owner().nextLocalMessageId(),
+		flags,
+		base::unixtime::now(),
+		PreparedServiceText{ { text } });
+	return AdminLog::OwnedItem(delegate, item);
+}
+
 [[nodiscard]] AdminLog::OwnedItem GenerateTextItem(
 		not_null<HistoryView::ElementDelegate*> delegate,
 		not_null<History*> history,
@@ -136,19 +155,35 @@ constexpr auto kMaxWallPaperSlugLength = 255;
 BackgroundPreviewBox::BackgroundPreviewBox(
 	QWidget*,
 	not_null<Window::SessionController*> controller,
-	const Data::WallPaper &paper)
+	const Data::WallPaper &paper,
+	BackgroundPreviewArgs args)
 : SimpleElementDelegate(controller, [=] { update(); })
 , _controller(controller)
+, _forPeer(args.forPeer)
+, _fromMessageId(args.fromMessageId)
 , _chatStyle(std::make_unique<Ui::ChatStyle>())
+, _serviceHistory(_controller->session().data().history(
+	PeerData::kServiceNotificationsId))
+, _service((_forPeer && !_fromMessageId)
+	? GenerateServiceItem(
+		delegate(),
+		_serviceHistory,
+		tr::lng_background_other_info(tr::now, lt_user, _forPeer->shortName()),
+		false)
+	: nullptr)
 , _text1(GenerateTextItem(
 	delegate(),
 	_controller->session().data().history(PeerData::kServiceNotificationsId),
-	tr::lng_background_text1(tr::now),
+	(_forPeer
+		? tr::lng_background_apply1(tr::now)
+		: tr::lng_background_text1(tr::now)),
 	false))
 , _text2(GenerateTextItem(
 	delegate(),
 	_controller->session().data().history(PeerData::kServiceNotificationsId),
-	tr::lng_background_text2(tr::now),
+	(_forPeer
+		? tr::lng_background_apply2(tr::now)
+		: tr::lng_background_text2(tr::now)),
 	true))
 , _paper(paper)
 , _media(_paper.document() ? _paper.document()->createMediaView() : nullptr)
@@ -187,9 +222,11 @@ not_null<HistoryView::ElementDelegate*> BackgroundPreviewBox::delegate() {
 void BackgroundPreviewBox::prepare() {
 	setTitle(tr::lng_background_header());
 
-	addButton(tr::lng_background_apply(), [=] { apply(); });
+	addButton(_forPeer
+		? tr::lng_background_apply_button()
+		: tr::lng_background_apply(), [=] { apply(); });
 	addButton(tr::lng_cancel(), [=] { closeBox(); });
-	if (_paper.hasShareUrl()) {
+	if (!_forPeer && _paper.hasShareUrl()) {
 		addLeftButton(tr::lng_background_share(), [=] { share(); });
 	}
 	updateServiceBg(_paper.backgroundColors());
@@ -207,7 +244,11 @@ void BackgroundPreviewBox::prepare() {
 	setScaledFromThumb();
 	checkLoadedDocument();
 
-	_text1->setDisplayDate(true);
+	if (_service) {
+		_service->initDimensions();
+		_service->resizeGetHeight(st::boxWideWidth);
+	}
+	_text1->setDisplayDate(!_service);
 	_text1->initDimensions();
 	_text1->resizeGetHeight(st::boxWideWidth);
 	_text2->initDimensions();
@@ -244,6 +285,35 @@ void BackgroundPreviewBox::createBlurCheckbox() {
 }
 
 void BackgroundPreviewBox::apply() {
+	if (_forPeer) {
+		applyForPeer();
+	} else {
+		applyForEveryone();
+	}
+	closeBox();
+}
+
+void BackgroundPreviewBox::applyForPeer() {
+	Expects(_forPeer != nullptr);
+
+	const auto api = &_controller->session().api();
+	using Flag = MTPmessages_SetChatWallPaper::Flag;
+	api->request(MTPmessages_SetChatWallPaper(
+		MTP_flags((_fromMessageId ? Flag::f_id : Flag())
+			| (_fromMessageId ? Flag() : Flag::f_wallpaper)
+			| Flag::f_settings),
+		_forPeer->input,
+		_paper.mtpInput(&_controller->session()),
+		_paper.mtpSettings(),
+		MTP_int(_fromMessageId.msg)
+	)).done([=](const MTPUpdates &result) {
+		api->applyUpdates(result);
+	}).send();
+
+	_forPeer->setWallPaper(_paper);
+}
+
+void BackgroundPreviewBox::applyForEveryone() {
 	const auto install = (_paper.id() != Window::Theme::Background()->id())
 		&& Data::IsCloudWallPaper(_paper);
 	_controller->content()->setChatBackground(_paper, std::move(_full));
@@ -253,7 +323,6 @@ void BackgroundPreviewBox::apply() {
 			_paper.mtpSettings()
 		)).send();
 	}
-	closeBox();
 }
 
 void BackgroundPreviewBox::share() {
@@ -339,6 +408,7 @@ int BackgroundPreviewBox::textsTop() const {
 	const auto bottom = _blur ? _blur->y() : height();
 	return bottom
 		- st::historyPaddingBottom
+		- (_service ? _service->height() : 0)
 		- _text1->height()
 		- _text2->height();
 }
@@ -353,6 +423,7 @@ QRect BackgroundPreviewBox::radialRect() const {
 }
 
 void BackgroundPreviewBox::paintTexts(Painter &p, crl::time ms) {
+	const auto heights = _service ? _service->height() : 0;
 	const auto height1 = _text1->height();
 	const auto height2 = _text2->height();
 	auto context = _controller->defaultChatTheme()->preparePaintContext(
@@ -361,7 +432,12 @@ void BackgroundPreviewBox::paintTexts(Painter &p, crl::time ms) {
 		rect(),
 		_controller->isGifPausedAtLeastFor(Window::GifPauseReason::Layer));
 	p.translate(0, textsTop());
-	paintDate(p);
+	if (_service) {
+		_service->draw(p, context);
+		p.translate(0, heights);
+	} else {
+		paintDate(p);
+	}
 
 	context.outbg = _text1->hasOutLayout();
 	_text1->draw(p, context);

Telegram/SourceFiles/boxes/background_preview_box.h

@@ -28,6 +28,11 @@ class Checkbox;
 class ChatStyle;
 } // namespace Ui
 
+struct BackgroundPreviewArgs {
+	PeerData *forPeer = nullptr;
+	FullMsgId fromMessageId;
+};
+
 class BackgroundPreviewBox
 	: public Ui::BoxContent
 	, private HistoryView::SimpleElementDelegate {
@@ -35,7 +40,8 @@ public:
 	BackgroundPreviewBox(
 		QWidget*,
 		not_null<Window::SessionController*> controller,
-		const Data::WallPaper &paper);
+		const Data::WallPaper &paper,
+		BackgroundPreviewArgs args = {});
 
 	static bool Start(
 		not_null<Window::SessionController*> controller,
@@ -53,6 +59,8 @@ private:
 	HistoryView::Context elementContext() override;
 
 	void apply();
+	void applyForPeer();
+	void applyForEveryone();
 	void share();
 	void radialAnimationCallback(crl::time now);
 	QRect radialRect() const;
@@ -72,7 +80,11 @@ private:
 	void checkBlurAnimationStart();
 
 	const not_null<Window::SessionController*> _controller;
+	PeerData * const _forPeer = nullptr;
+	FullMsgId _fromMessageId;
 	std::unique_ptr<Ui::ChatStyle> _chatStyle;
+	const not_null<History*> _serviceHistory;
+	AdminLog::OwnedItem _service;
 	AdminLog::OwnedItem _text1;
 	AdminLog::OwnedItem _text2;
 	Data::WallPaper _paper;

Telegram/SourceFiles/data/data_wall_paper.cpp

@@ -357,6 +357,8 @@ MTPWallPaperSettings WallPaper::mtpSettings() const {
 	};
 	return MTP_wallPaperSettings(
 		MTP_flags((_blurred ? Flag::f_blur : Flag(0))
+			| Flag::f_intensity
+			| Flag::f_rotation
 			| flagForIndex(0)
 			| flagForIndex(1)
 			| flagForIndex(2)
@@ -487,11 +489,11 @@ std::optional<WallPaper> WallPaper::Create(
 	if (const auto settings = data.vsettings()) {
 		settings->match([&](const MTPDwallPaperSettings &data) {
 			result._blurred = data.is_blur();
+			if (const auto intensity = data.vintensity()) {
+				result._intensity = intensity->v;
+			}
 			if (result.isPattern()) {
 				result._backgroundColors = ColorsFromMTP(data);
-				if (const auto intensity = data.vintensity()) {
-					result._intensity = intensity->v;
-				}
 				if (const auto rotation = data.vrotation()) {
 					result._rotation = rotation->v;
 				}

Telegram/SourceFiles/history/view/media/history_view_theme_document.cpp

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "history/view/media/history_view_theme_document.h"
 
+#include "boxes/background_preview_box.h"
 #include "history/history.h"
 #include "history/history_item.h"
 #include "history/view/history_view_element.h"
@@ -443,11 +444,22 @@ QString ThemeDocumentBox::button() {
 ClickHandlerPtr ThemeDocumentBox::createViewLink() {
 	const auto out = _parent->data()->out();
 	const auto to = _parent->history()->peer;
+	const auto media = _parent->data()->media();
+	const auto paper = media ? media->paper() : nullptr;
+	const auto maybe = paper ? *paper : std::optional<Data::WallPaper>();
+	const auto itemId = _parent->data()->fullId();
 	return std::make_shared<LambdaClickHandler>([=](ClickContext context) {
 		const auto my = context.other.value<ClickHandlerContext>();
 		if (const auto controller = my.sessionWindow.get()) {
 			if (out) {
 				controller->toggleChooseChatTheme(to);
+			} else if (maybe) {
+				controller->show(
+					Box<BackgroundPreviewBox>(
+						controller,
+						*maybe,
+						BackgroundPreviewArgs{ to, itemId }),
+					Ui::LayerOption::KeepOther);
 			}
 		}
 	});