Finish up singleton refactoring into one giant class

src/application.cpp

@@ -4,10 +4,12 @@
 #include "singletons/accountmanager.hpp"
 #include "singletons/commandmanager.hpp"
 #include "singletons/emotemanager.hpp"
+#include "singletons/fontmanager.hpp"
 #include "singletons/loggingmanager.hpp"
 #include "singletons/nativemessagingmanager.hpp"
 #include "singletons/pathmanager.hpp"
 #include "singletons/pubsubmanager.hpp"
+#include "singletons/resourcemanager.hpp"
 #include "singletons/settingsmanager.hpp"
 #include "singletons/thememanager.hpp"
 #include "singletons/windowmanager.hpp"
@@ -57,7 +59,7 @@ void Application::construct()
     isAppConstructed = true;
 
     // 1. Instantiate all classes
-    this->paths = new singletons::PathManager(argc, argv);
+    this->paths = new singletons::PathManager(this->argc, this->argv);
     this->themes = new singletons::ThemeManager;
     this->windows = new singletons::WindowManager;
     this->logging = new singletons::LoggingManager;
@@ -66,6 +68,10 @@ void Application::construct()
     this->emotes = new singletons::EmoteManager;
     this->pubsub = new singletons::PubSubManager;
     this->settings = new singletons::SettingManager;
+    this->fonts = new singletons::FontManager;
+    this->resources = new singletons::ResourceManager;
+
+    this->twitch.server = new providers::twitch::TwitchServer;
 }
 
 void Application::instantiate(int argc, char **argv)
@@ -81,18 +87,20 @@ void Application::initialize()
     isAppInitialized = true;
 
     // 2. Initialize/load classes
+    this->settings->initialize();
     this->windows->initialize();
 
     this->nativeMessaging->registerHost();
 
-    this->settings->initialize();
+    this->settings->load();
     this->commands->loadCommands();
 
-    // Initialize everything we need
     this->emotes->loadGlobalEmotes();
 
     this->accounts->load();
 
+    this->twitch.server->initialize();
+
     // XXX
     this->settings->updateWordTypeMask();
 
@@ -121,8 +129,7 @@ void Application::initialize()
     });
 
     this->pubsub->sig.moderation.userBanned.connect([&](const auto &action) {
-        auto &server = providers::twitch::TwitchServer::getInstance();
+        auto chan = this->twitch.server->getChannelOrEmptyByID(action.roomID);
-        auto chan = server.getChannelOrEmptyByID(action.roomID);
 
         if (chan->isEmpty()) {
             return;
@@ -134,8 +141,7 @@ void Application::initialize()
     });
 
     this->pubsub->sig.moderation.userUnbanned.connect([&](const auto &action) {
-        auto &server = providers::twitch::TwitchServer::getInstance();
+        auto chan = this->twitch.server->getChannelOrEmptyByID(action.roomID);
-        auto chan = server.getChannelOrEmptyByID(action.roomID);
 
         if (chan->isEmpty()) {
             return;
@@ -164,7 +170,7 @@ void Application::initialize()
 int Application::run(QApplication &qtApp)
 {
     // Start connecting to the IRC Servers (Twitch only for now)
-    providers::twitch::TwitchServer::getInstance().connect();
+    this->twitch.server->connect();
 
     // Show main window
     this->windows->getMainWindow().show();

src/application.hpp

@@ -7,6 +7,14 @@
 
 namespace chatterino {
 
+namespace providers {
+namespace twitch {
+
+class TwitchServer;
+
+}  // namespace twitch
+}  // namespace providers
+
 namespace singletons {
 
 class ThemeManager;
@@ -19,6 +27,8 @@ class EmoteManager;
 class PubSubManager;
 class NativeMessagingManager;
 class SettingManager;
+class FontManager;
+class ResourceManager;
 
 }  // namespace singletons
 
@@ -37,6 +47,8 @@ public:
 
     int run(QApplication &qtApp);
 
+    friend void test();
+
     singletons::PathManager *paths = nullptr;
     singletons::ThemeManager *themes = nullptr;
     singletons::WindowManager *windows = nullptr;
@@ -47,6 +59,13 @@ public:
     singletons::PubSubManager *pubsub = nullptr;
     singletons::NativeMessagingManager *nativeMessaging = nullptr;
     singletons::SettingManager *settings = nullptr;
+    singletons::FontManager *fonts = nullptr;
+    singletons::ResourceManager *resources = nullptr;
+
+    /// Provider-specific
+    struct {
+        providers::twitch::TwitchServer *server;
+    } twitch;
 
     void save();
 

src/messages/layouts/messagelayout.cpp

@@ -62,10 +62,9 @@ bool MessageLayout::layout(int width, float scale, MessageElement::Flags flags)
     this->emoteGeneration = app->emotes->getGeneration();
 
     // check if text changed
-    bool textChanged =
+    bool textChanged = this->fontGeneration != app->fonts->getGeneration();
-        this->fontGeneration != singletons::FontManager::getInstance().getGeneration();
     layoutRequired |= textChanged;
-    this->fontGeneration = singletons::FontManager::getInstance().getGeneration();
+    this->fontGeneration = app->fonts->getGeneration();
 
     // check if work mask changed
     bool wordMaskChanged = this->currentWordFlags != flags;  // app->settings->getWordTypeMask();
@@ -160,8 +159,7 @@ void MessageLayout::paint(QPainter &painter, int y, int messageIndex, Selection
 
     // draw disabled
     if (this->message->flags.HasFlag(Message::Disabled)) {
-        painter.fillRect(0, y, pixmap->width(), pixmap->height(),
+        painter.fillRect(0, y, pixmap->width(), pixmap->height(), app->themes->messages.disabled);
-                         app->themes->messages.disabled);
     }
 
     // draw selection
@@ -171,8 +169,7 @@ void MessageLayout::paint(QPainter &painter, int y, int messageIndex, Selection
 
     // draw last read message line
     if (isLastReadMessage) {
-        QColor color = isWindowFocused
+        QColor color = isWindowFocused ? app->themes->tabs.selected.backgrounds.regular.color()
-                           ? app->themes->tabs.selected.backgrounds.regular.color()
                                        : app->themes->tabs.selected.backgrounds.unfocused.color();
 
         QBrush brush(color, Qt::VerPattern);

src/messages/layouts/messagelayoutelement.cpp

@@ -1,4 +1,5 @@
 #include "messages/layouts/messagelayoutelement.hpp"
+
 #include "application.hpp"
 #include "messages/messageelement.hpp"
 #include "util/debugcount.hpp"
@@ -165,9 +166,11 @@ int TextLayoutElement::getSelectionIndexCount()
 
 void TextLayoutElement::paint(QPainter &painter)
 {
+    auto app = getApp();
+
     painter.setPen(this->color);
 
-    painter.setFont(singletons::FontManager::getInstance().getFont(this->style, this->scale));
+    painter.setFont(app->fonts->getFont(this->style, this->scale));
 
     painter.drawText(QRectF(this->getRect().x(), this->getRect().y(), 10000, 10000), this->text,
                      QTextOption(Qt::AlignLeft | Qt::AlignTop));
@@ -183,8 +186,9 @@ int TextLayoutElement::getMouseOverIndex(const QPoint &abs)
         return 0;
     }
 
-    QFontMetrics &metrics =
+    auto app = getApp();
-        singletons::FontManager::getInstance().getFontMetrics(this->style, this->scale);
+
+    QFontMetrics &metrics = app->fonts->getFontMetrics(this->style, this->scale);
 
     int x = this->getRect().left();
 
@@ -203,8 +207,9 @@ int TextLayoutElement::getMouseOverIndex(const QPoint &abs)
 
 int TextLayoutElement::getXFromIndex(int index)
 {
-    QFontMetrics &metrics =
+    auto app = getApp();
-        singletons::FontManager::getInstance().getFontMetrics(this->style, this->scale);
+
+    QFontMetrics &metrics = app->fonts->getFontMetrics(this->style, this->scale);
 
     if (index <= 0) {
         return this->getRect().left();
@@ -242,7 +247,7 @@ void TextIconLayoutElement::paint(QPainter &painter)
 {
     auto app = getApp();
 
-    QFont font = singletons::FontManager::getInstance().getFont(FontStyle::Tiny, this->scale);
+    QFont font = app->fonts->getFont(FontStyle::Tiny, this->scale);
 
     painter.setPen(app->themes->messages.textColors.system);
     painter.setFont(font);

src/messages/messageelement.cpp

@@ -139,8 +139,7 @@ void TextElement::addToContainer(MessageLayoutContainer &container, MessageEleme
     auto app = getApp();
 
     if (_flags & this->getFlags()) {
-        QFontMetrics &metrics = singletons::FontManager::getInstance().getFontMetrics(
+        QFontMetrics &metrics = app->fonts->getFontMetrics(this->style, container.getScale());
-            this->style, container.getScale());
 
         for (Word &word : this->words) {
             auto getTextLayoutElement = [&](QString text, int width, bool trailingSpace) {

src/providers/twitch/ircmessagehandler.cpp

@@ -35,12 +35,15 @@ void IrcMessageHandler::handleRoomStateMessage(Communi::IrcMessage *message)
         QStringList words = QString(message->toData()).split("#");
 
         // ensure the format is valid
-        if (words.length() < 2)
+        if (words.length() < 2) {
             return;
+        }
+
+        auto app = getApp();
 
         QString channelName = words.at(1);
 
-        auto channel = TwitchServer::getInstance().getChannelOrEmpty(channelName);
+        auto channel = app->twitch.server->getChannelOrEmpty(channelName);
 
         if (channel->isEmpty()) {
             return;
@@ -51,7 +54,7 @@ void IrcMessageHandler::handleRoomStateMessage(Communi::IrcMessage *message)
             twitchChannel->setRoomID(roomID);
         }
 
-        ResourceManager::getInstance().loadChannelData(roomID);
+        app->resources->loadChannelData(roomID);
     }
 }
 
@@ -68,8 +71,10 @@ void IrcMessageHandler::handleClearChatMessage(Communi::IrcMessage *message)
         return;
     }
 
+    auto app = getApp();
+
     // get channel
-    auto chan = TwitchServer::getInstance().getChannelOrEmpty(chanName);
+    auto chan = app->twitch.server->getChannelOrEmpty(chanName);
 
     if (chan->isEmpty()) {
         debug::Log("[IrcMessageHandler:handleClearChatMessage] Twitch channel {} not found",
@@ -125,8 +130,6 @@ void IrcMessageHandler::handleClearChatMessage(Communi::IrcMessage *message)
         }
     }
 
-    auto app = getApp();
-
     // refresh all
     app->windows->repaintVisibleChatWidgets(chan.get());
 }
@@ -136,12 +139,14 @@ void IrcMessageHandler::handleUserStateMessage(Communi::IrcMessage *message)
     QVariant _mod = message->tag("mod");
 
     if (_mod.isValid()) {
+        auto app = getApp();
+
         QString channelName;
         if (!TrimChannelName(message->parameter(0), channelName)) {
             return;
         }
 
-        auto c = TwitchServer::getInstance().getChannelOrEmpty(channelName);
+        auto c = app->twitch.server->getChannelOrEmpty(channelName);
         if (c->isEmpty()) {
             return;
         }
@@ -161,7 +166,7 @@ void IrcMessageHandler::handleWhisperMessage(Communi::IrcMessage *message)
 
     args.isReceivedWhisper = true;
 
-    auto c = TwitchServer::getInstance().whispersChannel.get();
+    auto c = app->twitch.server->whispersChannel.get();
 
     twitch::TwitchMessageBuilder builder(c, message, message->parameter(1), args);
 
@@ -170,13 +175,13 @@ void IrcMessageHandler::handleWhisperMessage(Communi::IrcMessage *message)
         _message->flags |= messages::Message::DoNotTriggerNotification;
 
         if (_message->flags & messages::Message::Highlighted) {
-            TwitchServer::getInstance().mentionsChannel->addMessage(_message);
+            app->twitch.server->mentionsChannel->addMessage(_message);
         }
 
         c->addMessage(_message);
 
         if (app->settings->inlineWhispers) {
-            TwitchServer::getInstance().forEachChannel([_message](ChannelPtr channel) {
+            app->twitch.server->forEachChannel([_message](ChannelPtr channel) {
                 channel->addMessage(_message);  //
             });
         }
@@ -190,8 +195,9 @@ void IrcMessageHandler::handleUserNoticeMessage(Communi::IrcMessage *message)
 
 void IrcMessageHandler::handleModeMessage(Communi::IrcMessage *message)
 {
-    auto channel =
+    auto app = getApp();
-        TwitchServer::getInstance().getChannelOrEmpty(message->parameter(0).remove(0, 1));
+
+    auto channel = app->twitch.server->getChannelOrEmpty(message->parameter(0).remove(0, 1));
 
     if (channel->isEmpty()) {
         return;
@@ -206,19 +212,20 @@ void IrcMessageHandler::handleModeMessage(Communi::IrcMessage *message)
 
 void IrcMessageHandler::handleNoticeMessage(Communi::IrcNoticeMessage *message)
 {
+    auto app = getApp();
     MessagePtr msg = Message::createSystemMessage(message->content());
 
     QString channelName;
     if (!TrimChannelName(message->target(), channelName)) {
         // Notice wasn't targeted at a single channel, send to all twitch channels
-        TwitchServer::getInstance().forEachChannelAndSpecialChannels([msg](const auto &c) {
+        app->twitch.server->forEachChannelAndSpecialChannels([msg](const auto &c) {
             c->addMessage(msg);  //
         });
 
         return;
     }
 
-    auto channel = TwitchServer::getInstance().getChannelOrEmpty(channelName);
+    auto channel = app->twitch.server->getChannelOrEmpty(channelName);
 
     if (channel->isEmpty()) {
         debug::Log("[IrcManager:handleNoticeMessage] Channel {} not found in channel manager",

src/providers/twitch/twitchmessagebuilder.cpp

@@ -539,8 +539,9 @@ bool TwitchMessageBuilder::tryAppendEmote(QString &emoteString)
 //		   maybe put the individual badges into a map instead of this mess
 void TwitchMessageBuilder::appendTwitchBadges()
 {
-    singletons::ResourceManager &resourceManager = singletons::ResourceManager::getInstance();
+    auto app = getApp();
-    const auto &channelResources = resourceManager.channels[this->roomID];
+
+    const auto &channelResources = app->resources->channels[this->roomID];
 
     auto iterator = this->tags.find("badges");
 
@@ -557,7 +558,7 @@ void TwitchMessageBuilder::appendTwitchBadges()
         }
 
         if (badge.startsWith("bits/")) {
-            if (!singletons::ResourceManager::getInstance().dynamicBadgesLoaded) {
+            if (!app->resources->dynamicBadgesLoaded) {
                 // Do nothing
                 continue;
             }
@@ -576,45 +577,45 @@ void TwitchMessageBuilder::appendTwitchBadges()
 
             // Use default bit badge
             try {
-                const auto &badge = resourceManager.badgeSets.at("bits").versions.at(versionKey);
+                const auto &badge = app->resources->badgeSets.at("bits").versions.at(versionKey);
                 this->emplace<ImageElement>(badge.badgeImage1x, MessageElement::BadgeVanity);
             } catch (const std::out_of_range &) {
                 debug::Log("No default bit badge for version {} found", versionKey);
                 continue;
             }
         } else if (badge == "staff/1") {
-            this->emplace<ImageElement>(resourceManager.badgeStaff,
+            this->emplace<ImageElement>(app->resources->badgeStaff,
                                         MessageElement::BadgeGlobalAuthority)
                 ->setTooltip("Twitch Staff");
         } else if (badge == "admin/1") {
-            this->emplace<ImageElement>(resourceManager.badgeAdmin,
+            this->emplace<ImageElement>(app->resources->badgeAdmin,
                                         MessageElement::BadgeGlobalAuthority)
                 ->setTooltip("Twitch Admin");
         } else if (badge == "global_mod/1") {
-            this->emplace<ImageElement>(resourceManager.badgeGlobalModerator,
+            this->emplace<ImageElement>(app->resources->badgeGlobalModerator,
                                         MessageElement::BadgeGlobalAuthority)
                 ->setTooltip("Twitch Global Moderator");
         } else if (badge == "moderator/1") {
             // TODO: Implement custom FFZ moderator badge
-            this->emplace<ImageElement>(resourceManager.badgeModerator,
+            this->emplace<ImageElement>(app->resources->badgeModerator,
                                         MessageElement::BadgeChannelAuthority)
                 ->setTooltip("Twitch Channel Moderator");
         } else if (badge == "turbo/1") {
-            this->emplace<ImageElement>(resourceManager.badgeTurbo,
+            this->emplace<ImageElement>(app->resources->badgeTurbo,
                                         MessageElement::BadgeGlobalAuthority)
                 ->setTooltip("Twitch Turbo Subscriber");
         } else if (badge == "broadcaster/1") {
-            this->emplace<ImageElement>(resourceManager.badgeBroadcaster,
+            this->emplace<ImageElement>(app->resources->badgeBroadcaster,
                                         MessageElement::BadgeChannelAuthority)
                 ->setTooltip("Twitch Broadcaster");
         } else if (badge == "premium/1") {
-            this->emplace<ImageElement>(resourceManager.badgePremium, MessageElement::BadgeVanity)
+            this->emplace<ImageElement>(app->resources->badgePremium, MessageElement::BadgeVanity)
                 ->setTooltip("Twitch Prime Subscriber");
         } else if (badge.startsWith("partner/")) {
             int index = badge.midRef(8).toInt();
             switch (index) {
                 case 1: {
-                    this->emplace<ImageElement>(resourceManager.badgeVerified,
+                    this->emplace<ImageElement>(app->resources->badgeVerified,
                                                 MessageElement::BadgeVanity)
                         ->setTooltip("Twitch Verified");
                 } break;
@@ -631,7 +632,7 @@ void TwitchMessageBuilder::appendTwitchBadges()
             auto badgeSetIt = channelResources.badgeSets.find("subscriber");
             if (badgeSetIt == channelResources.badgeSets.end()) {
                 // Fall back to default badge
-                this->emplace<ImageElement>(resourceManager.badgeSubscriber,
+                this->emplace<ImageElement>(app->resources->badgeSubscriber,
                                             MessageElement::BadgeSubscription)
                     ->setTooltip("Twitch Subscriber");
                 continue;
@@ -645,7 +646,7 @@ void TwitchMessageBuilder::appendTwitchBadges()
 
             if (badgeVersionIt == badgeSet.versions.end()) {
                 // Fall back to default badge
-                this->emplace<ImageElement>(resourceManager.badgeSubscriber,
+                this->emplace<ImageElement>(app->resources->badgeSubscriber,
                                             MessageElement::BadgeSubscription)
                     ->setTooltip("Twitch Subscriber");
                 continue;
@@ -657,7 +658,7 @@ void TwitchMessageBuilder::appendTwitchBadges()
                                         MessageElement::BadgeSubscription)
                 ->setTooltip("Twitch " + QString::fromStdString(badgeVersion.title));
         } else {
-            if (!resourceManager.dynamicBadgesLoaded) {
+            if (!app->resources->dynamicBadgesLoaded) {
                 // Do nothing
                 continue;
             }
@@ -675,7 +676,7 @@ void TwitchMessageBuilder::appendTwitchBadges()
             std::string versionKey = parts[1].toStdString();
 
             try {
-                auto &badgeSet = resourceManager.badgeSets.at(badgeSetKey);
+                auto &badgeSet = app->resources->badgeSets.at(badgeSetKey);
 
                 try {
                     auto &badgeVersion = badgeSet.versions.at(versionKey);
@@ -696,7 +697,9 @@ void TwitchMessageBuilder::appendTwitchBadges()
 
 void TwitchMessageBuilder::appendChatterinoBadges()
 {
-    auto &badges = singletons::ResourceManager::getInstance().chatterinoBadges;
+    auto app = getApp();
+
+    auto &badges = app->resources->chatterinoBadges;
     auto it = badges.find(this->userName.toStdString());
 
     if (it == badges.end()) {
@@ -711,9 +714,9 @@ void TwitchMessageBuilder::appendChatterinoBadges()
 
 bool TwitchMessageBuilder::tryParseCheermote(const QString &string)
 {
+    auto app = getApp();
     // Try to parse custom cheermotes
-    const auto &channelResources =
+    const auto &channelResources = app->resources->channels[this->roomID];
-        singletons::ResourceManager::getInstance().channels[this->roomID];
     if (channelResources.loaded) {
         for (const auto &cheermoteSet : channelResources.cheermoteSets) {
             auto match = cheermoteSet.regex.match(string);

src/providers/twitch/twitchserver.cpp

@@ -23,15 +23,12 @@ TwitchServer::TwitchServer()
     , watchingChannel(Channel::getEmpty(), Channel::TwitchWatching)
 {
     qDebug() << "init TwitchServer";
-
-    getApp()->accounts->Twitch.userChanged.connect(
-        [this]() { util::postToThread([this] { this->connect(); }); });
 }
 
-TwitchServer &TwitchServer::getInstance()
+void TwitchServer::initialize()
 {
-    static TwitchServer s;
+    getApp()->accounts->Twitch.userChanged.connect(
-    return s;
+        [this]() { util::postToThread([this] { this->connect(); }); });
 }
 
 void TwitchServer::initializeConnection(IrcConnection *connection, bool isRead, bool isWrite)
@@ -85,7 +82,7 @@ void TwitchServer::privateMessageReceived(IrcPrivateMessage *message)
     }
 
     this->onPrivateMessage.invoke(message);
-    auto chan = TwitchServer::getInstance().getChannelOrEmpty(channelName);
+    auto chan = this->getChannelOrEmpty(channelName);
 
     if (chan->isEmpty()) {
         return;
@@ -98,7 +95,7 @@ void TwitchServer::privateMessageReceived(IrcPrivateMessage *message)
     if (!builder.isIgnored()) {
         messages::MessagePtr _message = builder.build();
         if (_message->flags & messages::Message::Highlighted) {
-            TwitchServer::getInstance().mentionsChannel->addMessage(_message);
+            this->mentionsChannel->addMessage(_message);
         }
 
         chan->addMessage(_message);

src/providers/twitch/twitchserver.hpp

@@ -13,10 +13,11 @@ namespace twitch {
 class TwitchServer final : public irc::AbstractIrcServer
 {
     TwitchServer();
+    friend class Application;
+
+    void initialize();
 
 public:
-    static TwitchServer &getInstance();
-
     // fourtf: ugh
     void forEachChannelAndSpecialChannels(std::function<void(ChannelPtr)> func);
 

src/singletons/accountmanager.hpp

@@ -7,10 +7,9 @@ namespace singletons {
 
 class AccountManager
 {
-    AccountManager() = default;
-    friend class Application;
-
 public:
+    AccountManager() = default;
+
     ~AccountManager() = delete;
 
     void load();

src/singletons/commandmanager.cpp

@@ -151,10 +151,11 @@ QString CommandManager::execCommand(const QString &text, ChannelPtr channel, boo
                     return "";
                 }
 
+                auto app = getApp();
+
                 messages::MessageBuilder b;
 
-                b.emplace<messages::TextElement>(
+                b.emplace<messages::TextElement>(app->accounts->Twitch.getCurrent()->getUserName(),
-                    getApp()->accounts->Twitch.getCurrent()->getUserName(),
                                                  messages::MessageElement::Text);
                 b.emplace<messages::TextElement>("->", messages::MessageElement::Text);
                 b.emplace<messages::TextElement>(words[1], messages::MessageElement::Text);
@@ -167,7 +168,7 @@ QString CommandManager::execCommand(const QString &text, ChannelPtr channel, boo
 
                 b.emplace<messages::TextElement>(rest, messages::MessageElement::Text);
 
-                TwitchServer::getInstance().whispersChannel->addMessage(b.getMessage());
+                app->twitch.server->whispersChannel->addMessage(b.getMessage());
             }
         }
 

src/singletons/commandmanager.hpp

@@ -17,10 +17,9 @@ namespace singletons {
 
 class CommandManager
 {
-    CommandManager() = default;
-    friend class Application;
-
 public:
+    CommandManager() = default;
+
     QString execCommand(const QString &text, std::shared_ptr<Channel> channel, bool dryRun);
 
     void loadCommands();

src/singletons/emotemanager.hpp

@@ -22,10 +22,9 @@ namespace singletons {
 
 class EmoteManager
 {
-    EmoteManager();
-    friend class Application;
-
 public:
+    EmoteManager();
+
     ~EmoteManager() = delete;
 
     void initialize();

src/singletons/fontmanager.cpp

@@ -32,6 +32,7 @@ FontManager::FontManager()
         this->currentFontByScale.clear();
         this->fontChanged.invoke();
     });
+
     this->currentFontSize.connect([this](const int &newValue, auto) {
         this->incGeneration();
         //        this->currentFont.setSize(newValue);
@@ -40,12 +41,6 @@ FontManager::FontManager()
     });
 }
 
-FontManager &FontManager::getInstance()
-{
-    static FontManager instance;
-    return instance;
-}
-
 QFont &FontManager::getFont(FontManager::Type type, float scale)
 {
     //    return this->currentFont.getFont(type);

src/singletons/fontmanager.hpp

@@ -11,11 +11,13 @@ namespace singletons {
 
 class FontManager
 {
-    FontManager(const FontManager &) = delete;
+public:
-    FontManager(FontManager &&) = delete;
     FontManager();
 
-public:
+    FontManager(const FontManager &) = delete;
+    FontManager(FontManager &&) = delete;
+    ~FontManager() = delete;
+
     enum Type : uint8_t {
         Tiny,
         Small,
@@ -27,9 +29,6 @@ public:
         VeryLarge,
     };
 
-    // FontManager is initialized only once, on first use
-    static FontManager &getInstance();
-
     QFont &getFont(Type type, float scale);
     QFontMetrics &getFontMetrics(Type type, float scale);
 

src/singletons/loggingmanager.hpp

@@ -12,12 +12,11 @@ class PathManager;
 
 class LoggingManager
 {
-    LoggingManager() = default;
-    friend class Application;
-
     PathManager *pathManager = nullptr;
 
 public:
+    LoggingManager() = default;
+
     ~LoggingManager() = delete;
 
     void initialize();

src/singletons/nativemessagingmanager.cpp

@@ -130,6 +130,8 @@ void NativeMessagingManager::ReceiverThread::run()
 
 void NativeMessagingManager::ReceiverThread::handleMessage(const QJsonObject &root)
 {
+    auto app = getApp();
+
     QString action = root.value("action").toString();
 
     if (action.isNull()) {
@@ -151,16 +153,15 @@ void NativeMessagingManager::ReceiverThread::handleMessage(const QJsonObject &ro
         }
 
         if (_type == "twitch") {
-            util::postToThread([name, attach, winId, yOffset] {
+            util::postToThread([name, attach, winId, yOffset, app] {
-                auto &ts = providers::twitch::TwitchServer::getInstance();
+                app->twitch.server->watchingChannel.update(
-
+                    app->twitch.server->getOrAddChannel(name));
-                ts.watchingChannel.update(ts.getOrAddChannel(name));
 
                 if (attach) {
 #ifdef USEWINSDK
                     auto *window =
                         widgets::AttachedWindow::get(::GetForegroundWindow(), winId, yOffset);
-                    window->setChannel(ts.getOrAddChannel(name));
+                    window->setChannel(app->twitch.server->getOrAddChannel(name));
                     window->show();
 #endif
                 }

src/singletons/nativemessagingmanager.hpp

@@ -7,10 +7,9 @@ namespace singletons {
 
 class NativeMessagingManager
 {
-    NativeMessagingManager();
-    friend class Application;
-
 public:
+    NativeMessagingManager();
+
     ~NativeMessagingManager() = delete;
 
     class ReceiverThread : public QThread

src/singletons/pathmanager.hpp

@@ -7,10 +7,9 @@ namespace singletons {
 
 class PathManager
 {
-    PathManager(int argc, char **argv);
-    friend class Application;
-
 public:
+    PathManager(int argc, char **argv);
+
     // %APPDATA%/chatterino or ExecutablePath for portable mode
     QString settingsFolderPath;
 

src/singletons/pubsubmanager.hpp

@@ -68,9 +68,6 @@ private:
 
 class PubSubManager
 {
-    PubSubManager();
-    friend class Application;
-
     using WebsocketMessagePtr = websocketpp::config::asio_tls_client::message_type::ptr;
     using WebsocketContextPtr = websocketpp::lib::shared_ptr<boost::asio::ssl::context>;
 
@@ -81,6 +78,8 @@ class PubSubManager
     std::unique_ptr<std::thread> mainThread;
 
 public:
+    PubSubManager();
+
     ~PubSubManager() = delete;
 
     enum class State {

src/singletons/resourcemanager.cpp

@@ -289,18 +289,15 @@ ResourceManager::ResourceManager()
     , buttonTimeout(lli(":/images/button_timeout.png", 0.25))
 {
     qDebug() << "init ResourceManager";
+}
 
+void ResourceManager::initialize()
+{
     this->loadDynamicTwitchBadges();
 
     this->loadChatterinoBadges();
 }
 
-ResourceManager &ResourceManager::getInstance()
-{
-    static ResourceManager instance;
-    return instance;
-}
-
 ResourceManager::BadgeVersion::BadgeVersion(QJsonObject &&root)
     : badgeImage1x(new messages::Image(root.value("image_url_1x").toString()))
     , badgeImage2x(new messages::Image(root.value("image_url_2x").toString()))

src/singletons/resourcemanager.hpp

@@ -13,10 +13,12 @@ namespace singletons {
 
 class ResourceManager
 {
+public:
     ResourceManager();
 
-public:
+    ~ResourceManager() = delete;
-    static ResourceManager &getInstance();
+
+    void initialize();
 
     messages::Image *badgeStaff;
     messages::Image *badgeAdmin;

src/singletons/settingsmanager.cpp

@@ -32,7 +32,10 @@ SettingManager::SettingManager()
     this->wordFlagsListener.cb = [this](auto) {
         this->updateWordTypeMask();  //
     };
+}
 
+void SettingManager::initialize()
+{
     this->moderationActions.connect([this](auto, auto) { this->updateModerationActions(); });
     this->ignoredKeywords.connect([this](auto, auto) { this->updateIgnoredKeywords(); });
 
@@ -52,7 +55,7 @@ bool SettingManager::isIgnoredEmote(const QString &)
     return false;
 }
 
-void SettingManager::initialize()
+void SettingManager::load()
 {
     auto app = getApp();
     QString settingsPath = app->paths->settingsFolderPath + "/settings.json";
@@ -155,7 +158,7 @@ const std::shared_ptr<std::vector<QString>> SettingManager::getIgnoredKeywords()
 
 void SettingManager::updateModerationActions()
 {
-    auto &resources = singletons::ResourceManager::getInstance();
+    auto app = getApp();
 
     this->_moderationActions.clear();
 
@@ -207,10 +210,10 @@ void SettingManager::updateModerationActions()
 
                 this->_moderationActions.emplace_back(line1, line2, str);
             } else {
-                this->_moderationActions.emplace_back(resources.buttonTimeout, str);
+                this->_moderationActions.emplace_back(app->resources->buttonTimeout, str);
             }
         } else if (str.startsWith("/ban ")) {
-            this->_moderationActions.emplace_back(resources.buttonBan, str);
+            this->_moderationActions.emplace_back(app->resources->buttonBan, str);
         } else {
             QString xD = str;
 

src/singletons/settingsmanager.hpp

@@ -21,16 +21,16 @@ class SettingManager
     using StringSetting = ChatterinoSetting<std::string>;
     using QStringSetting = ChatterinoSetting<QString>;
 
-    SettingManager();
-    friend class Application;
-
 public:
+    SettingManager();
+
     ~SettingManager() = delete;
 
     messages::MessageElement::Flags getWordFlags();
     bool isIgnoredEmote(const QString &emote);
 
     void initialize();
+    void load();
 
     /// Appearance
     BoolSetting showTimestamps = {"/appearance/messages/showTimestamps", true};

src/singletons/thememanager.hpp

@@ -13,10 +13,9 @@ class WindowManager;
 
 class ThemeManager
 {
-    ThemeManager();
-    friend class Application;
-
 public:
+    ThemeManager();
+
     ~ThemeManager() = delete;
 
     inline bool isLightTheme() const

src/singletons/windowmanager.cpp

@@ -331,16 +331,17 @@ IndirectChannel WindowManager::decodeChannel(const QJsonObject &obj)
 {
     util::assertInGuiThread();
 
+    auto app = getApp();
+
     QString type = obj.value("type").toString();
     if (type == "twitch") {
-        return providers::twitch::TwitchServer::getInstance().getOrAddChannel(
+        return app->twitch.server->getOrAddChannel(obj.value("name").toString());
-            obj.value("name").toString());
     } else if (type == "mentions") {
-        return providers::twitch::TwitchServer::getInstance().mentionsChannel;
+        return app->twitch.server->mentionsChannel;
     } else if (type == "watching") {
-        return providers::twitch::TwitchServer::getInstance().watchingChannel;
+        return app->twitch.server->watchingChannel;
     } else if (type == "whispers") {
-        return providers::twitch::TwitchServer::getInstance().whispersChannel;
+        return app->twitch.server->whispersChannel;
     }
 
     return Channel::getEmpty();

src/singletons/windowmanager.hpp

@@ -7,10 +7,9 @@ namespace singletons {
 
 class WindowManager
 {
-    WindowManager();
-    friend class Application;
-
 public:
+    WindowManager();
+
     ~WindowManager() = delete;
 
     void showSettingsDialog();

src/widgets/helper/channelview.cpp

@@ -75,8 +75,7 @@ ChannelView::ChannelView(BaseWidget *parent)
     this->goToBottom->getLabel().setText("More messages below");
     this->goToBottom->setVisible(false);
 
-    this->managedConnections.emplace_back(
+    this->managedConnections.emplace_back(app->fonts->fontChanged.connect([this] {
-        singletons::FontManager::getInstance().fontChanged.connect([this] {
         this->layoutMessages();  //
     }));
 
@@ -514,7 +513,7 @@ messages::MessageElement::Flags ChannelView::getFlags() const
         if (split->getModerationMode()) {
             flags = (MessageElement::Flags)(flags | MessageElement::ModeratorTools);
         }
-        if (this->channel == TwitchServer::getInstance().mentionsChannel) {
+        if (this->channel == app->twitch.server->mentionsChannel) {
             flags = (MessageElement::Flags)(flags | MessageElement::ChannelName);
         }
     }

src/widgets/helper/label.cpp

@@ -1,4 +1,6 @@
 #include "label.hpp"
+
+#include "application.hpp"
 #include "singletons/fontmanager.hpp"
 
 #include <QPainter>
@@ -9,8 +11,11 @@ namespace widgets {
 Label::Label(BaseWidget *parent)
     : BaseWidget(parent)
 {
-    singletons::FontManager::getInstance().fontChanged.connect(
+    auto app = getApp();
-        [this]() { this->scaleChangedEvent(this->getScale()); });
+
+    app->fonts->fontChanged.connect([=]() {
+        this->scaleChangedEvent(this->getScale());  //
+    });
 }
 
 const QString &Label::getText() const
@@ -37,8 +42,9 @@ void Label::setFontStyle(FontStyle style)
 
 void Label::scaleChangedEvent(float scale)
 {
-    QFontMetrics metrics =
+    auto app = getApp();
-        singletons::FontManager::getInstance().getFontMetrics(this->fontStyle, scale);
+
+    QFontMetrics metrics = app->fonts->getFontMetrics(this->fontStyle, scale);
 
     this->preferedSize = QSize(metrics.width(this->text), metrics.height());
 
@@ -57,13 +63,13 @@ QSize Label::minimumSizeHint() const
 
 void Label::paintEvent(QPaintEvent *)
 {
-    QPainter painter(this);
+    auto app = getApp();
-    painter.setFont(singletons::FontManager::getInstance().getFont(
-        this->fontStyle, this->getScale() / painter.device()->devicePixelRatioF()));
 
-    int width = singletons::FontManager::getInstance()
+    QPainter painter(this);
-                    .getFontMetrics(this->fontStyle, this->getScale())
+    painter.setFont(app->fonts->getFont(this->fontStyle,
-                    .width(this->text);
+                                        this->getScale() / painter.device()->devicePixelRatioF()));
+
+    int width = app->fonts->getFontMetrics(this->fontStyle, this->getScale()).width(this->text);
 
     int flags = Qt::TextSingleLine;
 

src/widgets/helper/splitheader.cpp

@@ -1,4 +1,6 @@
 #include "widgets/helper/splitheader.hpp"
+
+#include "application.hpp"
 #include "providers/twitch/twitchchannel.hpp"
 #include "providers/twitch/twitchserver.hpp"
 #include "singletons/resourcemanager.hpp"
@@ -28,17 +30,16 @@ SplitHeader::SplitHeader(Split *_split)
     : BaseWidget(_split)
     , split(_split)
 {
+    auto app = getApp();
     this->setMouseTracking(true);
 
-    singletons::ResourceManager &resourceManager = singletons::ResourceManager::getInstance();
-
     util::LayoutCreator<SplitHeader> layoutCreator(this);
     auto layout = layoutCreator.emplace<QHBoxLayout>().withoutMargin();
     {
         // dropdown label
         auto dropdown = layout.emplace<RippleEffectButton>(this).assign(&this->dropdownButton);
         dropdown->setMouseTracking(true);
-        dropdown->setPixmap(resourceManager.splitHeaderContext->getPixmap());
+        dropdown->setPixmap(app->resources->splitHeaderContext->getPixmap());
         this->addDropdownItems(dropdown.getElement());
         QObject::connect(dropdown.getElement(), &RippleEffectButton::clicked, this, [this] {
             QTimer::singleShot(80, [&] {
@@ -197,10 +198,11 @@ void SplitHeader::updateChannelText()
 
 void SplitHeader::updateModerationModeIcon()
 {
-    singletons::ResourceManager &resourceManager = singletons::ResourceManager::getInstance();
+    auto app = getApp();
+
     this->moderationButton->setPixmap(this->split->getModerationMode()
-                                          ? resourceManager.moderationmode_enabled->getPixmap()
+                                          ? app->resources->moderationmode_enabled->getPixmap()
-                                          : resourceManager.moderationmode_disabled->getPixmap());
+                                          : app->resources->moderationmode_disabled->getPixmap());
 
     bool modButtonVisible = false;
     ChannelPtr channel = this->split->getChannel();
@@ -285,8 +287,10 @@ void SplitHeader::menuReloadChannelEmotes()
 
 void SplitHeader::menuManualReconnect()
 {
+    auto app = getApp();
+
     // fourtf: connection
-    providers::twitch::TwitchServer::getInstance().connect();
+    app->twitch.server->connect();
 }
 
 void SplitHeader::menuShowChangelog()

src/widgets/helper/splitinput.cpp

@@ -39,7 +39,6 @@ SplitInput::SplitInput(Split *_chatWidget)
 void SplitInput::initLayout()
 {
     auto app = getApp();
-    auto &fontManager = singletons::FontManager::getInstance();
     util::LayoutCreator<SplitInput> layoutCreator(this);
 
     auto layout = layoutCreator.setLayoutType<QHBoxLayout>().withoutMargin().assign(&this->ui.hbox);
@@ -66,11 +65,11 @@ void SplitInput::initLayout()
 
     // set edit font
     this->ui.textEdit->setFont(
-        fontManager.getFont(singletons::FontManager::Type::Medium, this->getScale()));
+        app->fonts->getFont(singletons::FontManager::Type::Medium, this->getScale()));
 
-    this->managedConnections.emplace_back(fontManager.fontChanged.connect([this, &fontManager]() {
+    this->managedConnections.emplace_back(app->fonts->fontChanged.connect([=]() {
         this->ui.textEdit->setFont(
-            fontManager.getFont(singletons::FontManager::Type::Medium, this->getScale()));
+            app->fonts->getFont(singletons::FontManager::Type::Medium, this->getScale()));
     }));
 
     // open emote popup

src/widgets/selectchanneldialog.cpp

@@ -1,5 +1,6 @@
 #include "selectchanneldialog.hpp"
 
+#include "application.hpp"
 #include "providers/twitch/twitchserver.hpp"
 #include "util/layoutcreator.hpp"
 
@@ -179,17 +180,18 @@ IndirectChannel SelectChannelDialog::getSelectedChannel() const
         return this->selectedChannel;
     }
 
+    auto app = getApp();
+
     switch (this->ui.notebook->getSelectedIndex()) {
         case TAB_TWITCH: {
             if (this->ui.twitch.channel->isChecked()) {
-                return providers::twitch::TwitchServer::getInstance().getOrAddChannel(
+                return app->twitch.server->getOrAddChannel(this->ui.twitch.channelName->text());
-                    this->ui.twitch.channelName->text());
             } else if (this->ui.twitch.watching->isChecked()) {
-                return providers::twitch::TwitchServer::getInstance().watchingChannel;
+                return app->twitch.server->watchingChannel;
             } else if (this->ui.twitch.mentions->isChecked()) {
-                return providers::twitch::TwitchServer::getInstance().mentionsChannel;
+                return app->twitch.server->mentionsChannel;
             } else if (this->ui.twitch.whispers->isChecked()) {
-                return providers::twitch::TwitchServer::getInstance().whispersChannel;
+                return app->twitch.server->whispersChannel;
             }
         }
     }

src/widgets/settingspages/appearancepage.cpp

@@ -142,35 +142,33 @@ QLayout *AppearancePage::createThemeColorChanger()
 
 QLayout *AppearancePage::createFontChanger()
 {
-    QHBoxLayout *layout = new QHBoxLayout;
+    auto app = getApp();
 
-    auto &fontManager = singletons::FontManager::getInstance();
+    QHBoxLayout *layout = new QHBoxLayout;
 
     // LABEL
     QLabel *label = new QLabel();
     layout->addWidget(label);
 
-    auto updateFontFamilyLabel = [label, &fontManager](auto) {
+    auto updateFontFamilyLabel = [=](auto) {
-        label->setText(QString::fromStdString(fontManager.currentFontFamily.getValue()) + ", " +
+        label->setText(QString::fromStdString(app->fonts->currentFontFamily.getValue()) + ", " +
-                       QString::number(fontManager.currentFontSize) + "pt");
+                       QString::number(app->fonts->currentFontSize) + "pt");
     };
 
-    fontManager.currentFontFamily.connectSimple(updateFontFamilyLabel, this->managedConnections);
+    app->fonts->currentFontFamily.connectSimple(updateFontFamilyLabel, this->managedConnections);
-    fontManager.currentFontSize.connectSimple(updateFontFamilyLabel, this->managedConnections);
+    app->fonts->currentFontSize.connectSimple(updateFontFamilyLabel, this->managedConnections);
 
     // BUTTON
     QPushButton *button = new QPushButton("Select");
     layout->addWidget(button);
     button->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Policy::Fixed);
 
-    QObject::connect(button, &QPushButton::clicked, []() {
+    QObject::connect(button, &QPushButton::clicked, [=]() {
-        auto &fontManager = singletons::FontManager::getInstance();
+        QFontDialog dialog(app->fonts->getFont(singletons::FontManager::Medium, 1.));
-        QFontDialog dialog(fontManager.getFont(singletons::FontManager::Medium, 1.));
 
-        dialog.connect(&dialog, &QFontDialog::fontSelected, [](const QFont &font) {
+        dialog.connect(&dialog, &QFontDialog::fontSelected, [=](const QFont &font) {
-            auto &fontManager = singletons::FontManager::getInstance();
+            app->fonts->currentFontFamily = font.family().toStdString();
-            fontManager.currentFontFamily = font.family().toStdString();
+            app->fonts->currentFontSize = font.pointSize();
-            fontManager.currentFontSize = font.pointSize();
         });
 
         dialog.show();

src/widgets/tooltipwidget.cpp

@@ -1,4 +1,6 @@
 #include "tooltipwidget.hpp"
+
+#include "application.hpp"
 #include "singletons/fontmanager.hpp"
 #include "singletons/thememanager.hpp"
 
@@ -14,6 +16,8 @@ TooltipWidget::TooltipWidget(BaseWidget *parent)
     : BaseWindow(parent)
     , displayText(new QLabel())
 {
+    auto app = getApp();
+
     this->setStyleSheet("color: #fff; background: #000");
     this->setWindowOpacity(0.8);
     this->updateFont();
@@ -31,8 +35,7 @@ TooltipWidget::TooltipWidget(BaseWidget *parent)
     layout->addWidget(displayText);
     this->setLayout(layout);
 
-    this->fontChangedConnection =
+    this->fontChangedConnection = app->fonts->fontChanged.connect([this] { this->updateFont(); });
-        singletons::FontManager::getInstance().fontChanged.connect([this] { this->updateFont(); });
 }
 
 TooltipWidget::~TooltipWidget()
@@ -47,8 +50,10 @@ void TooltipWidget::scaleChangedEvent(float)
 
 void TooltipWidget::updateFont()
 {
-    this->setFont(singletons::FontManager::getInstance().getFont(
+    auto app = getApp();
-        singletons::FontManager::Type::MediumSmall, this->getScale()));
+
+    this->setFont(
+        app->fonts->getFont(singletons::FontManager::Type::MediumSmall, this->getScale()));
 }
 
 void TooltipWidget::setText(QString text)