feat: add REPL for plugins (#6120)

This can be enabled by setting the `.plugins.repl.enabled` setting to true


Close Chatterino and make a backup of your settings.json before attempting any modifications.
```json5
{
  "plugins": {
    "repl": {
      "enabled": true,
    },
  },
}
```

src/widgets/settingspages/PluginsPage.cpp

@@ -3,12 +3,15 @@
 
 #    include "Application.hpp"
 #    include "common/Args.hpp"
+#    include "controllers/accounts/AccountController.hpp"
 #    include "controllers/plugins/PluginController.hpp"
 #    include "singletons/Paths.hpp"
 #    include "singletons/Settings.hpp"
 #    include "util/Helpers.hpp"
 #    include "util/LayoutCreator.hpp"
 #    include "util/RemoveScrollAreaBackground.hpp"
+#    include "widgets/PluginRepl.hpp"
+#    include "widgets/settingspages/SettingWidget.hpp"
 
 #    include <QCheckBox>
 #    include <QFormLayout>
@@ -78,6 +81,17 @@ PluginsPage::PluginsPage()
                                    "enable and disable them.");
             groupLayout->addRow(disabledLabel);
         }
+
+        if (getSettings()->pluginRepl.enabled)
+        {
+            groupLayout->addRow(SettingWidget::fontButton(
+                "REPL font", getSettings()->pluginRepl.fontFamily,
+                &PluginRepl::currentFont, [](const QFont &font) {
+                    getSettings()->pluginRepl.fontFamily = font.family();
+                    getSettings()->pluginRepl.fontSize = font.pointSize();
+                    getSettings()->pluginRepl.fontStyle = font.styleName();
+                }));
+        }
     }
 
     this->rebuildContent();
@@ -231,6 +245,16 @@ void PluginsPage::rebuildContent()
         {
             reloadButton->setEnabled(false);
         }
+
+        if (getSettings()->pluginRepl.enabled)
+        {
+            auto *replButton = new QPushButton("Open REPL", this->dataFrame_);
+            QObject::connect(replButton, &QPushButton::clicked, [id]() {
+                auto *repl = new PluginRepl(id);
+                repl->show();
+            });
+            pluginEntry->addRow(replButton);
+        }
     }
 }
 

src/widgets/settingspages/SettingWidget.cpp

@@ -10,6 +10,7 @@
 
 #include <QBoxLayout>
 #include <QCheckBox>
+#include <QFontDialog>
 #include <QFormLayout>
 #include <QLabel>
 #include <QLineEdit>
@@ -393,6 +394,45 @@ SettingWidget *SettingWidget::lineEdit(const QString &label,
     return widget;
 }
 
+SettingWidget *SettingWidget::fontButton(const QString &label,
+                                         QStringSetting &familySetting,
+                                         std::function<QFont()> currentFont,
+                                         std::function<void(QFont)> onChange)
+{
+    auto *widget = new SettingWidget(label);
+
+    auto *lbl = new QLabel(label + ":");
+
+    auto *button = new QPushButton(currentFont().family());
+
+    widget->hLayout->addWidget(lbl);
+    widget->hLayout->addStretch(1);
+    widget->hLayout->addWidget(button);
+
+    familySetting.connect(
+        [button, currentFont](const auto &) {
+            button->setText(currentFont().family());
+        },
+        widget->managedConnections);
+
+    QObject::connect(button, &QPushButton::clicked,
+                     [widget, currentFont{std::move(currentFont)},
+                      onChange{std::move(onChange)}]() {
+                         bool ok = false;
+                         auto font =
+                             QFontDialog::getFont(&ok, currentFont(), widget);
+                         if (ok)
+                         {
+                             onChange(font);
+                         }
+                     });
+
+    widget->actionWidget = button;
+    widget->label = lbl;
+
+    return widget;
+}
+
 SettingWidget *SettingWidget::setTooltip(QString tooltip)
 {
     assert(!tooltip.isEmpty());

src/widgets/settingspages/SettingWidget.hpp

@@ -23,7 +23,7 @@ namespace chatterino {
 
 class GeneralPageView;
 
-class SettingWidget : QWidget
+class SettingWidget : public QWidget
 {
     Q_OBJECT
 
@@ -66,6 +66,11 @@ public:
                                    QStringSetting &setting,
                                    const QString &placeholderText = {});
 
+    static SettingWidget *fontButton(const QString &label,
+                                     QStringSetting &familySetting,
+                                     std::function<QFont()> currentFont,
+                                     std::function<void(QFont)> onChange);
+
     SettingWidget *setTooltip(QString tooltip);
     SettingWidget *setDescription(const QString &text);