Add new animations engine.

Telegram/SourceFiles/app.cpp

@@ -117,10 +117,9 @@ namespace App {
 	}
 
 	MainWindow *wnd() {
-		if (Core::Sandbox::Instance().applicationLaunched()) {
-			return Core::App().getActiveWindow();
-		}
-		return nullptr;
+		return Core::IsAppLaunched()
+			? Core::App().getActiveWindow()
+			: nullptr;
 	}
 
 	MainWidget *main() {

Telegram/SourceFiles/auth_session.cpp

@@ -9,7 +9,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "apiwrap.h"
 #include "core/application.h"
-#include "core/sandbox.h"
 #include "core/changelogs.h"
 #include "storage/file_download.h"
 #include "storage/file_upload.h"
@@ -430,8 +429,7 @@ AuthSession::AuthSession(const MTPUser &user)
 }
 
 bool AuthSession::Exists() {
-	return Core::Sandbox::Instance().applicationLaunched()
-		&& (Core::App().authSession() != nullptr);
+	return Core::IsAppLaunched() && (Core::App().authSession() != nullptr);
 }
 
 base::Observable<void> &AuthSession::downloaderTaskFinished() {

Telegram/SourceFiles/boxes/background_preview_box.cpp

@@ -784,7 +784,7 @@ void BackgroundPreviewBox::elementAnimationAutoplayAsync(
 
 crl::time BackgroundPreviewBox::elementHighlightTime(
 		not_null<const Element*> element) {
-	return crl::time();
+	return crl::time(0);
 }
 
 bool BackgroundPreviewBox::elementInSelectionMode() {

Telegram/SourceFiles/core/application.cpp

@@ -47,6 +47,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/image/image.h"
 #include "ui/text_options.h"
 #include "ui/emoji_config.h"
+#include "ui/effects/animations.h"
 #include "storage/serialize_common.h"
 #include "window/window_controller.h"
 #include "base/qthelp_regex.h"
@@ -63,6 +64,8 @@ constexpr auto kQuitPreventTimeoutMs = 1500;
 
 } // namespace
 
+Application *Application::Instance = nullptr;
+
 struct Application::Private {
 	UserId authSessionUserId = 0;
 	QByteArray authSessionUserSerialized;
@@ -78,12 +81,16 @@ Application::Application(not_null<Launcher*> launcher)
 , _launcher(launcher)
 , _private(std::make_unique<Private>())
 , _databases(std::make_unique<Storage::Databases>())
+, _animationsManager(std::make_unique<Ui::Animations::Manager>())
 , _langpack(std::make_unique<Lang::Instance>())
 , _audio(std::make_unique<Media::Audio::Instance>())
 , _logo(Window::LoadLogo())
 , _logoNoMargin(Window::LoadLogoNoMargin()) {
 	Expects(!_logo.isNull());
 	Expects(!_logoNoMargin.isNull());
+	Expects(Instance == nullptr);
+
+	Instance = this;
 }
 
 void Application::run() {
@@ -1157,10 +1164,18 @@ Application::~Application() {
 	Local::finish();
 	Global::finish();
 	ThirdParty::finish();
+
+	Instance = nullptr;
+}
+
+bool IsAppLaunched() {
+	return (Application::Instance != nullptr);
 }
 
 Application &App() {
-	return Sandbox::Instance().application();
+	Expects(Application::Instance != nullptr);
+
+	return *Application::Instance;
 }
 
 } // namespace Core

Telegram/SourceFiles/core/application.h

@@ -30,6 +30,12 @@ namespace App {
 void quit();
 } // namespace App
 
+namespace Ui {
+namespace Animations {
+class Manager;
+} // namespace Animations
+} // namespace Ui
+
 namespace MTP {
 class DcOptions;
 class Instance;
@@ -74,6 +80,10 @@ public:
 
 	void run();
 
+	Ui::Animations::Manager &animationManager() const {
+		return *_animationsManager;
+	}
+
 	// Windows interface.
 	MainWindow *getActiveWindow() const;
 	bool closeActiveWindow();
@@ -222,6 +232,9 @@ protected:
 	bool eventFilter(QObject *object, QEvent *event) override;
 
 private:
+	friend bool IsAppLaunched();
+	friend Application &App();
+
 	void destroyMtpKeys(MTP::AuthKeysList &&keys);
 	void allKeysDestroyed();
 
@@ -239,6 +252,8 @@ private:
 	void clearPasscodeLock();
 	void loggedOut();
 
+	static Application *Instance;
+
 	not_null<Launcher*> _launcher;
 
 	// Some fields are just moved from the declaration.
@@ -247,10 +262,11 @@ private:
 
 	QWidget _globalShortcutParent;
 
-	std::unique_ptr<Storage::Databases> _databases;
+	const std::unique_ptr<Storage::Databases> _databases;
+	const std::unique_ptr<Ui::Animations::Manager> _animationsManager;
 	std::unique_ptr<MainWindow> _window;
 	std::unique_ptr<Media::View::OverlayWidget> _mediaView;
-	std::unique_ptr<Lang::Instance> _langpack;
+	const std::unique_ptr<Lang::Instance> _langpack;
 	std::unique_ptr<Lang::CloudManager> _langCloudManager;
 	std::unique_ptr<Lang::Translator> _translator;
 	std::unique_ptr<MTP::DcOptions> _dcOptions;
@@ -261,9 +277,9 @@ private:
 	base::Observable<void> _passcodedChanged;
 	QPointer<BoxContent> _badProxyDisableBox;
 
-	std::unique_ptr<Media::Audio::Instance> _audio;
-	QImage _logo;
-	QImage _logoNoMargin;
+	const std::unique_ptr<Media::Audio::Instance> _audio;
+	const QImage _logo;
+	const QImage _logoNoMargin;
 
 	rpl::variable<bool> _passcodeLock;
 	rpl::event_stream<bool> _termsLockChanges;
@@ -289,6 +305,7 @@ private:
 
 };
 
-Application &App();
+[[nodiscard]] bool IsAppLaunched();
+[[nodiscard]] Application &App();
 
 } // namespace Core

Telegram/SourceFiles/core/sandbox.cpp

@@ -13,15 +13,16 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "storage/localstorage.h"
 #include "window/notifications_manager.h"
 #include "core/crash_reports.h"
+#include "core/crash_report_window.h"
 #include "core/application.h"
 #include "core/launcher.h"
 #include "core/local_url_handlers.h"
+#include "core/update_checker.h"
 #include "base/timer.h"
 #include "base/concurrent_timer.h"
 #include "base/qthelp_url.h"
 #include "base/qthelp_regex.h"
-#include "core/update_checker.h"
-#include "core/crash_report_window.h"
+#include "ui/effects/animations.h"
 
 namespace Core {
 namespace {
@@ -498,6 +499,10 @@ bool Sandbox::notify(QObject *receiver, QEvent *e) {
 	}
 
 	const auto wrap = createEventNestingLevel();
+	const auto type = e->type();
+	if ((type == QEvent::UpdateRequest) && _application) {
+		_application->animationManager().update();
+	}
 	return QApplication::notify(receiver, e);
 }
 

Telegram/SourceFiles/core/sandbox.h

@@ -47,15 +47,6 @@ public:
 		return *static_cast<Sandbox*>(QApplication::instance());
 	}
 
-	bool applicationLaunched() const {
-		return _application != nullptr;
-	}
-	Application &application() const {
-		Expects(_application != nullptr);
-
-		return *_application;
-	}
-
 	~Sandbox();
 
 protected:

Telegram/SourceFiles/core/update_checker.cpp

@@ -12,7 +12,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "base/bytes.h"
 #include "storage/localstorage.h"
 #include "core/application.h"
-#include "core/sandbox.h"
 #include "mainwindow.h"
 #include "core/click_handler_types.h"
 #include "info/info_memento.h"
@@ -1384,7 +1383,7 @@ Updater::~Updater() {
 
 UpdateChecker::UpdateChecker()
 : _updater(GetUpdaterInstance()) {
-	if (Sandbox::Instance().applicationLaunched()) {
+	if (IsAppLaunched()) {
 		if (const auto mtproto = Core::App().mtp()) {
 			_updater->setMtproto(mtproto);
 		}

Telegram/SourceFiles/mtproto/facade.cpp

@@ -9,15 +9,14 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "storage/localstorage.h"
 #include "core/application.h"
-#include "core/sandbox.h"
 
 namespace MTP {
 namespace internal {
-namespace {
+//namespace {
 
 int PauseLevel = 0;
 
-} // namespace
+//} // namespace
 
 bool paused() {
 	return PauseLevel > 0;
@@ -39,9 +38,7 @@ void unpause() {
 } // namespace internal
 
 Instance *MainInstance() {
-	return Core::Sandbox::Instance().applicationLaunched()
-		? Core::App().mtp()
-		: nullptr;
+	return Core::IsAppLaunched() ? Core::App().mtp() : nullptr;
 }
 
 } // namespace MTP

Telegram/SourceFiles/platform/mac/specific_mac_p.mm

@@ -10,7 +10,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "mainwindow.h"
 #include "mainwidget.h"
 #include "core/application.h"
-#include "core/sandbox.h"
 #include "core/crash_reports.h"
 #include "storage/localstorage.h"
 #include "media/audio/media_audio.h"
@@ -142,13 +141,11 @@ ApplicationDelegate *_sharedDelegate = nil;
 
 - (void) applicationDidBecomeActive:(NSNotification *)aNotification {
 	ApplicationIsActive = true;
-	if (Core::Sandbox::Instance().applicationLaunched()) {
-		if (!_ignoreActivation) {
-			Core::App().handleAppActivated();
-			if (auto window = App::wnd()) {
-				if (window->isHidden()) {
-					window->showFromTray();
-				}
+	if (Core::IsAppLaunched() && !_ignoreActivation) {
+		Core::App().handleAppActivated();
+		if (auto window = App::wnd()) {
+			if (window->isHidden()) {
+				window->showFromTray();
 			}
 		}
 	}
@@ -159,7 +156,7 @@ ApplicationDelegate *_sharedDelegate = nil;
 }
 
 - (void) receiveWakeNote:(NSNotification*)aNotification {
-	if (Core::Sandbox::Instance().applicationLaunched()) {
+	if (Core::IsAppLaunched()) {
 		Core::App().checkLocalTime();
 	}
 

Telegram/SourceFiles/support/support_autocomplete.cpp

@@ -594,7 +594,7 @@ void ConfirmContactBox::elementAnimationAutoplayAsync(
 
 crl::time ConfirmContactBox::elementHighlightTime(
 		not_null<const Element*> element) {
-	return crl::time();
+	return crl::time(0);
 }
 
 bool ConfirmContactBox::elementInSelectionMode() {

Telegram/SourceFiles/ui/effects/animations.cpp

@@ -0,0 +1,122 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "ui/effects/animations.h"
+
+#include "core/application.h"
+
+namespace Ui {
+namespace Animations {
+namespace {
+
+constexpr auto kAnimationTimeout = crl::time(1000) / 60;
+constexpr auto kIgnoreUpdatesTimeout = crl::time(4);
+
+} // namespace
+
+void Basic::start() {
+	if (!animating()) {
+		Core::App().animationManager().start(this);
+	}
+	_started = crl::now();
+}
+
+void Basic::stop() {
+	if (animating()) {
+		Core::App().animationManager().stop(this);
+		_started = -1;
+	}
+}
+
+void Manager::start(not_null<Basic*> animation) {
+	if (_updating) {
+		_starting.push_back(animation);
+	} else {
+		if (empty(_active)) {
+			updateQueued();
+		}
+		_active.push_back(animation);
+	}
+}
+
+void Manager::stop(not_null<Basic*> animation) {
+	if (empty(_active)) {
+		return;
+	}
+	if (_updating) {
+		const auto i = ranges::find(_active, animation.get());
+		if (i != end(_active)) {
+			*i = nullptr;
+		}
+		return;
+	}
+	_active.erase(ranges::remove(_active, animation.get()), end(_active));
+	if (empty(_active)) {
+		stopTimer();
+	}
+}
+
+void Manager::update() {
+	if (_active.empty() || _updating || _scheduled) {
+		return;
+	}
+	const auto now = crl::now();
+	if (_lastUpdateTime + kIgnoreUpdatesTimeout >= now) {
+		return;
+	}
+	schedule();
+
+	_updating = true;
+	const auto guard = gsl::finally([&] { _updating = false; });
+
+	_lastUpdateTime = now;
+	_active.erase(ranges::remove_if(_active, [&](Basic *element) {
+		return !element || !element->call(now);
+	}), end(_active));
+
+	if (!empty(_starting)) {
+		auto starting = std::move(_starting);
+		_active.insert(end(_active), begin(starting), end(starting));
+	}
+}
+
+void Manager::updateQueued() {
+	InvokeQueued(this, [=] { update(); });
+}
+
+void Manager::schedule() {
+	if (_scheduled) {
+		return;
+	}
+	stopTimer();
+
+	_scheduled = true;
+	Ui::PostponeCall([=] {
+		_scheduled = false;
+
+		const auto next = _lastUpdateTime + kAnimationTimeout;
+		const auto now = crl::now();
+		if (now < next) {
+			_timerId = startTimer(next - now, Qt::PreciseTimer);
+		} else {
+			updateQueued();
+		}
+	});
+}
+
+void Manager::stopTimer() {
+	if (_timerId) {
+		killTimer(base::take(_timerId));
+	}
+}
+
+void Manager::timerEvent(QTimerEvent *e) {
+	update();
+}
+
+} // namespace Animations
+} // namespace Ui

Telegram/SourceFiles/ui/effects/animations.h

@@ -0,0 +1,287 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+namespace Ui {
+namespace Animations {
+
+class Manager;
+
+class Basic final {
+public:
+	Basic() = default;
+
+	template <typename Callback>
+	explicit Basic(Callback &&callback);
+
+	template <typename Callback>
+	void init(Callback &&callback);
+
+	void start();
+	void stop();
+
+	[[nodiscard]] bool animating() const;
+
+	~Basic();
+
+private:
+	friend class Manager;
+
+	template <typename Callback>
+	[[nodiscard]] static Fn<bool(crl::time)> Prepare(Callback &&callback);
+
+	[[nodiscard]] bool call(crl::time now) const;
+
+	crl::time _started = -1;
+	Fn<bool(crl::time)> _callback;
+
+};
+
+class Simple final {
+public:
+	template <typename Callback>
+	void start(
+		Callback &&callback,
+		float64 from,
+		float64 to,
+		crl::time duration,
+		anim::transition transition = anim::linear);
+	void stop();
+	[[nodiscard]] bool animating() const;
+	[[nodiscard]] float64 value(float64 final) const;
+
+private:
+	struct Data {
+		explicit Data(float64 initial) : value(initial) {
+		}
+		~Data() {
+			if (markOnDelete) {
+				*markOnDelete = true;
+			}
+		}
+
+		Basic animation;
+		anim::transition transition;
+		float64 from = 0.;
+		float64 delta = 0.;
+		float64 value = 0.;
+		float64 duration = 0.;
+		bool *markOnDelete = nullptr;
+		MTP::PauseHolder pause;
+	};
+
+	template <typename Callback>
+	[[nodiscard]] static decltype(auto) Prepare(Callback &&callback);
+
+	void prepare(float64 from, crl::time duration);
+	void startPrepared(
+		float64 to,
+		crl::time duration,
+		anim::transition transition);
+
+	static constexpr auto kLongAnimationDuration = crl::time(1000);
+
+	mutable std::unique_ptr<Data> _data;
+
+};
+
+class Manager final : private QObject {
+public:
+	void update();
+
+private:
+	friend class Basic;
+
+	void timerEvent(QTimerEvent *e) override;
+
+	void start(not_null<Basic*> animation);
+	void stop(not_null<Basic*> animation);
+
+	void schedule();
+	void updateQueued();
+	void stopTimer();
+
+	crl::time _lastUpdateTime = 0;
+	int _timerId = 0;
+	bool _updating = false;
+	bool _scheduled = false;
+	std::vector<Basic*> _active;
+	std::vector<not_null<Basic*>> _starting;
+
+};
+
+template <typename Callback>
+inline Fn<bool(crl::time)> Basic::Prepare(Callback &&callback) {
+	if constexpr (rpl::details::is_callable_plain_v<Callback, crl::time>) {
+		using Return = decltype(callback(crl::time(0)));
+		if constexpr (std::is_convertible_v<Return, bool>) {
+			return std::forward<Callback>(callback);
+		} else if constexpr (std::is_same_v<Return, void>) {
+			return [callback = std::forward<Callback>(callback)](
+					crl::time time) {
+				callback(time);
+				return true;
+			};
+		} else {
+			static_assert(false_t(callback), "Expected void or bool.");
+		}
+	} else if constexpr (rpl::details::is_callable_plain_v<Callback>) {
+		using Return = decltype(callback());
+		if constexpr (std::is_convertible_v<Return, bool>) {
+			return [callback = std::forward<Callback>(callback)](crl::time) {
+				return callback();
+			};
+		} else if constexpr (std::is_same_v<Return, void>) {
+			return [callback = std::forward<Callback>(callback)](crl::time) {
+				callback();
+				return true;
+			};
+		} else {
+			static_assert(false_t(callback), "Expected void or bool.");
+		}
+	} else {
+		static_assert(false_t(callback), "Expected crl::time or no args.");
+	}
+}
+
+template <typename Callback>
+inline Basic::Basic(Callback &&callback)
+: _callback(Prepare(std::forward<Callback>(callback))) {
+}
+
+template <typename Callback>
+inline void Basic::init(Callback &&callback) {
+	_callback = Prepare(std::forward<Callback>(callback));
+}
+
+TG_FORCE_INLINE bool Basic::animating() const {
+	return (_started >= 0);
+}
+
+TG_FORCE_INLINE bool Basic::call(crl::time now) const {
+	const auto onstack = _callback;
+	return onstack(now - _started);
+}
+
+inline Basic::~Basic() {
+	stop();
+}
+
+template <typename Callback>
+decltype(auto) Simple::Prepare(Callback &&callback) {
+	if constexpr (rpl::details::is_callable_plain_v<Callback, float64>) {
+		using Return = decltype(callback(float64(0.)));
+		if constexpr (std::is_convertible_v<Return, bool>) {
+			return std::forward<Callback>(callback);
+		} else if constexpr (std::is_same_v<Return, void>) {
+			return [callback = std::forward<Callback>(callback)](
+					float64 value) {
+				callback(value);
+				return true;
+			};
+		} else {
+			static_assert(false_t(callback), "Expected void or float64.");
+		}
+	} else if constexpr (rpl::details::is_callable_plain_v<Callback>) {
+		using Return = decltype(callback());
+		if constexpr (std::is_convertible_v<Return, bool>) {
+			return [callback = std::forward<Callback>(callback)](float64) {
+				return callback();
+			};
+		} else if constexpr (std::is_same_v<Return, void>) {
+			return [callback = std::forward<Callback>(callback)](float64) {
+				callback();
+				return true;
+			};
+		} else {
+			static_assert(false_t(callback), "Expected void or bool.");
+		}
+	} else {
+		static_assert(false_t(callback), "Expected float64 or no args.");
+	}
+}
+
+template <typename Callback>
+inline void Simple::start(
+		Callback &&callback,
+		float64 from,
+		float64 to,
+		crl::time duration,
+		anim::transition transition) {
+	prepare(from, duration);
+	_data->animation.init([
+		that = _data.get(),
+		callback = Prepare(std::forward<Callback>(callback))
+	](crl::time time) {
+		const auto finished = (time >= that->duration);
+		const auto progress = finished
+			? that->delta
+			: that->transition(that->delta, time / that->duration);
+		that->value = that->from + progress;
+
+		if (finished) {
+			that->animation.stop();
+		}
+
+		auto deleted = false;
+		that->markOnDelete = &deleted;
+		const auto result = callback(that->value) && !finished;
+		if (!deleted) {
+			that->markOnDelete = nullptr;
+			if (!result) {
+				that->pause.release();
+			}
+		}
+		return result;
+	});
+	startPrepared(to, duration, transition);
+}
+
+inline void Simple::prepare(float64 from, crl::time duration) {
+	const auto isLong = (duration >= kLongAnimationDuration);
+	if (!_data) {
+		_data = std::make_unique<Data>(from);
+	} else if (!isLong) {
+		_data->pause.restart();
+	}
+	if (isLong) {
+		_data->pause.release();
+	}
+}
+
+inline void Simple::stop() {
+	_data = nullptr;
+}
+
+inline bool Simple::animating() const {
+	if (!_data) {
+		return false;
+	} else if (!_data->animation.animating()) {
+		_data = nullptr;
+		return false;
+	}
+	return true;
+}
+
+TG_FORCE_INLINE float64 Simple::value(float64 final) const {
+	return animating() ? _data->value : final;
+}
+
+inline void Simple::startPrepared(
+		float64 to,
+		crl::time duration,
+		anim::transition transition) {
+	_data->from = _data->value;
+	_data->delta = to - _data->from;
+	_data->duration = duration;
+	_data->transition = transition;
+	_data->animation.start();
+}
+
+} // namespace Animations
+} // namespace Ui

Telegram/SourceFiles/ui/widgets/buttons.cpp

@@ -542,19 +542,18 @@ void LeftOutlineButton::paintEvent(QPaintEvent *e) {
 
 CrossButton::CrossButton(QWidget *parent, const style::CrossButton &st) : RippleButton(parent, st.ripple)
 , _st(st)
-, _a_loading(animation(this, &CrossButton::step_loading)) {
+, _a_loading([=](crl::time duration) { return loadingCallback(duration); }) {
 	resize(_st.width, _st.height);
 	setCursor(style::cur_pointer);
 	setVisible(false);
 }
 
-void CrossButton::step_loading(crl::time ms, bool timer) {
-	if (stopLoadingAnimation(ms)) {
-		_a_loading.stop();
-		update();
-	} else if (timer && !anim::Disabled()) {
+bool CrossButton::loadingCallback(crl::time duration) {
+	const auto result = !stopLoadingAnimation(duration);
+	if (!result || !anim::Disabled()) {
 		update();
 	}
+	return result;
 }
 
 void CrossButton::toggle(bool visible, anim::type animated) {
@@ -565,7 +564,7 @@ void CrossButton::toggle(bool visible, anim::type animated) {
 				setVisible(true);
 			}
 			_a_show.start(
-				[this] { animationCallback(); },
+				[=] { animationCallback(); },
 				_shown ? 0. : 1.,
 				_shown ? 1. : 0.,
 				_st.duration);
@@ -588,14 +587,15 @@ void CrossButton::paintEvent(QPaintEvent *e) {
 
 	auto ms = crl::now();
 	auto over = isOver();
-	auto shown = _a_show.current(ms, _shown ? 1. : 0.);
+	auto shown = _a_show.value(_shown ? 1. : 0.);
 	p.setOpacity(shown);
 
 	paintRipple(p, _st.crossPosition.x(), _st.crossPosition.y(), ms);
 
 	auto loading = 0.;
 	if (_a_loading.animating()) {
-		if (stopLoadingAnimation(ms)) {
+		const auto duration = (ms - _loadingStartMs);
+		if (stopLoadingAnimation(duration)) {
 			_a_loading.stop();
 		} else if (anim::Disabled()) {
 			CrossAnimation::paintStaticLoading(
@@ -608,7 +608,7 @@ void CrossButton::paintEvent(QPaintEvent *e) {
 				shown);
 			return;
 		} else {
-			loading = ((ms - _loadingStartMs) % _st.loadingPeriod)
+			loading = (duration % _st.loadingPeriod)
 				/ float64(_st.loadingPeriod);
 		}
 	}
@@ -623,12 +623,13 @@ void CrossButton::paintEvent(QPaintEvent *e) {
 		loading);
 }
 
-bool CrossButton::stopLoadingAnimation(crl::time ms) {
+bool CrossButton::stopLoadingAnimation(crl::time duration) {
 	if (!_loadingStopMs) {
 		return false;
 	}
-	auto stopPeriod = (_loadingStopMs - _loadingStartMs) / _st.loadingPeriod;
-	auto currentPeriod = (ms - _loadingStartMs) / _st.loadingPeriod;
+	const auto stopPeriod = (_loadingStopMs - _loadingStartMs)
+		/ _st.loadingPeriod;
+	const auto currentPeriod = duration / _st.loadingPeriod;
 	if (currentPeriod != stopPeriod) {
 		Assert(currentPeriod > stopPeriod);
 		return true;

Telegram/SourceFiles/ui/widgets/buttons.h

@@ -8,6 +8,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #pragma once
 
 #include "ui/abstract_button.h"
+#include "ui/effects/animations.h"
 #include "styles/style_widgets.h"
 
 #include <memory>
@@ -216,7 +217,7 @@ public:
 		return toggle(false, animated);
 	}
 	void finishAnimating() {
-		_a_show.finish();
+		_a_show.stop();
 		animationCallback();
 	}
 
@@ -234,18 +235,18 @@ protected:
 	QPoint prepareRippleStartPosition() const override;
 
 private:
-	void step_loading(crl::time ms, bool timer);
-	bool stopLoadingAnimation(crl::time ms);
+	bool loadingCallback(crl::time duration);
+	bool stopLoadingAnimation(crl::time duration);
 	void animationCallback();
 
 	const style::CrossButton &_st;
 
 	bool _shown = false;
-	Animation _a_show;
+	Ui::Animations::Simple _a_show;
 
 	crl::time _loadingStartMs = 0;
 	crl::time _loadingStopMs = 0;
-	BasicAnimation _a_loading;
+	Ui::Animations::Basic _a_loading;
 
 };
 

Telegram/SourceFiles/ui/widgets/input_fields.cpp

@@ -972,8 +972,7 @@ void FlatInput::paintEvent(QPaintEvent *e) {
 	Painter p(this);
 
 	auto ms = crl::now();
-	auto placeholderFocused = _a_placeholderFocused.current(ms, _focused ? 1. : 0.);
-
+	auto placeholderFocused = _a_placeholderFocused.value(_focused ? 1. : 0.);
 	auto pen = anim::pen(_st.borderColor, _st.borderActive, placeholderFocused);
 	pen.setWidth(_st.borderWidth);
 	p.setPen(pen);
@@ -987,7 +986,7 @@ void FlatInput::paintEvent(QPaintEvent *e) {
 		_st.icon.paint(p, 0, 0, width());
 	}
 
-	auto placeholderOpacity = _a_placeholderVisible.current(ms, _placeholderVisible ? 1. : 0.);
+	auto placeholderOpacity = _a_placeholderVisible.value(_placeholderVisible ? 1. : 0.);
 	if (placeholderOpacity > 0.) {
 		p.setOpacity(placeholderOpacity);
 
@@ -1007,7 +1006,11 @@ void FlatInput::paintEvent(QPaintEvent *e) {
 void FlatInput::focusInEvent(QFocusEvent *e) {
 	if (!_focused) {
 		_focused = true;
-		_a_placeholderFocused.start([this] { update(); }, 0., 1., _st.phDuration);
+		_a_placeholderFocused.start(
+			[=] { update(); },
+			0.,
+			1.,
+			_st.phDuration);
 		update();
 	}
 	QLineEdit::focusInEvent(e);
@@ -1017,7 +1020,11 @@ void FlatInput::focusInEvent(QFocusEvent *e) {
 void FlatInput::focusOutEvent(QFocusEvent *e) {
 	if (_focused) {
 		_focused = false;
-		_a_placeholderFocused.start([this] { update(); }, 1., 0., _st.phDuration);
+		_a_placeholderFocused.start(
+			[=] { update(); },
+			1.,
+			0.,
+			_st.phDuration);
 		update();
 	}
 	QLineEdit::focusOutEvent(e);
@@ -1069,7 +1076,11 @@ void FlatInput::updatePlaceholder() {
 	auto placeholderVisible = !hasText;
 	if (_placeholderVisible != placeholderVisible) {
 		_placeholderVisible = placeholderVisible;
-		_a_placeholderVisible.start([this] { update(); }, _placeholderVisible ? 0. : 1., _placeholderVisible ? 1. : 0., _st.phDuration);
+		_a_placeholderVisible.start(
+			[=] { update(); },
+			_placeholderVisible ? 0. : 1.,
+			_placeholderVisible ? 1. : 0.,
+			_st.phDuration);
 	}
 }
 

Telegram/SourceFiles/ui/widgets/input_fields.h

@@ -8,6 +8,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #pragma once
 
 #include "ui/rp_widget.h"
+#include "ui/effects/animations.h"
 #include "styles/style_widgets.h"
 
 class UserData;
@@ -110,8 +111,8 @@ private:
 
 	bool _focused = false;
 	bool _placeholderVisible = true;
-	Animation _a_placeholderFocused;
-	Animation _a_placeholderVisible;
+	Animations::Simple _a_placeholderFocused;
+	Animations::Simple _a_placeholderVisible;
 	bool _lastPreEditTextNotEmpty = false;
 
 	const style::FlatInput &_st;

Telegram/SourceFiles/window/main_window.cpp

@@ -16,7 +16,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "boxes/confirm_box.h"
 #include "core/click_handler_types.h"
 #include "core/application.h"
-#include "core/sandbox.h"
 #include "lang/lang_keys.h"
 #include "data/data_session.h"
 #include "auth_session.h"
@@ -87,12 +86,7 @@ void ConvertIconToBlack(QImage &image) {
 }
 
 QIcon CreateOfficialIcon() {
-	auto image = [&] {
-		if (Core::Sandbox::Instance().applicationLaunched()) {
-			return Core::App().logo();
-		}
-		return LoadLogo();
-	}();
+	auto image = Core::IsAppLaunched() ? Core::App().logo() : LoadLogo();
 	if (AuthSession::Exists() && Auth().supportMode()) {
 		ConvertIconToBlack(image);
 	}

Telegram/gyp/telegram_sources.txt

@@ -671,6 +671,8 @@
 <(src_loc)/support/support_helper.h
 <(src_loc)/support/support_templates.cpp
 <(src_loc)/support/support_templates.h
+<(src_loc)/ui/effects/animations.cpp
+<(src_loc)/ui/effects/animations.h
 <(src_loc)/ui/effects/cross_animation.cpp
 <(src_loc)/ui/effects/cross_animation.h
 <(src_loc)/ui/effects/fade_animation.cpp