Finish up singleton refactoring into one giant class

src/widgets/helper/channelview.cpp

@@ -75,10 +75,9 @@ ChannelView::ChannelView(BaseWidget *parent)
     this->goToBottom->getLabel().setText("More messages below");
     this->goToBottom->setVisible(false);
 
-    this->managedConnections.emplace_back(
-        singletons::FontManager::getInstance().fontChanged.connect([this] {
-            this->layoutMessages();  //
-        }));
+    this->managedConnections.emplace_back(app->fonts->fontChanged.connect([this] {
+        this->layoutMessages();  //
+    }));
 
     connect(goToBottom, &RippleEffectLabel::clicked, this, [=] {
         QTimer::singleShot(180, [=] {
@@ -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(
-        [this]() { this->scaleChangedEvent(this->getScale()); });
+    auto app = getApp();
+
+    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 =
-        singletons::FontManager::getInstance().getFontMetrics(this->fontStyle, scale);
+    auto app = getApp();
+
+    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);
-    painter.setFont(singletons::FontManager::getInstance().getFont(
-        this->fontStyle, this->getScale() / painter.device()->devicePixelRatioF()));
+    auto app = getApp();
 
-    int width = singletons::FontManager::getInstance()
-                    .getFontMetrics(this->fontStyle, this->getScale())
-                    .width(this->text);
+    QPainter painter(this);
+    painter.setFont(app->fonts->getFont(this->fontStyle,
+                                        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()
-                                          : resourceManager.moderationmode_disabled->getPixmap());
+                                          ? app->resources->moderationmode_enabled->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(
-                    this->ui.twitch.channelName->text());
+                return app->twitch.server->getOrAddChannel(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) {
-        label->setText(QString::fromStdString(fontManager.currentFontFamily.getValue()) + ", " +
-                       QString::number(fontManager.currentFontSize) + "pt");
+    auto updateFontFamilyLabel = [=](auto) {
+        label->setText(QString::fromStdString(app->fonts->currentFontFamily.getValue()) + ", " +
+                       QString::number(app->fonts->currentFontSize) + "pt");
     };
 
-    fontManager.currentFontFamily.connectSimple(updateFontFamilyLabel, this->managedConnections);
-    fontManager.currentFontSize.connectSimple(updateFontFamilyLabel, this->managedConnections);
+    app->fonts->currentFontFamily.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, []() {
-        auto &fontManager = singletons::FontManager::getInstance();
-        QFontDialog dialog(fontManager.getFont(singletons::FontManager::Medium, 1.));
+    QObject::connect(button, &QPushButton::clicked, [=]() {
+        QFontDialog dialog(app->fonts->getFont(singletons::FontManager::Medium, 1.));
 
-        dialog.connect(&dialog, &QFontDialog::fontSelected, [](const QFont &font) {
-            auto &fontManager = singletons::FontManager::getInstance();
-            fontManager.currentFontFamily = font.family().toStdString();
-            fontManager.currentFontSize = font.pointSize();
+        dialog.connect(&dialog, &QFontDialog::fontSelected, [=](const QFont &font) {
+            app->fonts->currentFontFamily = font.family().toStdString();
+            app->fonts->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 =
-        singletons::FontManager::getInstance().fontChanged.connect([this] { this->updateFont(); });
+    this->fontChangedConnection = app->fonts->fontChanged.connect([this] { this->updateFont(); });
 }
 
 TooltipWidget::~TooltipWidget()
@@ -47,8 +50,10 @@ void TooltipWidget::scaleChangedEvent(float)
 
 void TooltipWidget::updateFont()
 {
-    this->setFont(singletons::FontManager::getInstance().getFont(
-        singletons::FontManager::Type::MediumSmall, this->getScale()));
+    auto app = getApp();
+
+    this->setFont(
+        app->fonts->getFont(singletons::FontManager::Type::MediumSmall, this->getScale()));
 }
 
 void TooltipWidget::setText(QString text)