feat: spellcheck input (#6446)

Reviewed-by: Mm2PL <mm2pl+gh@kotmisia.pl>
Reviewed-by: pajlada <rasmus.karlsson@pajlada.com>
Reviewed-by: fourtf <tf.four@gmail.com>

src/widgets/helper/ResizingTextEdit.cpp

@@ -5,6 +5,7 @@
 #include "controllers/completion/TabCompletionModel.hpp"
 #include "singletons/Settings.hpp"
 
+#include <QMenu>
 #include <QMimeData>
 #include <QMimeDatabase>
 #include <QObject>
@@ -337,4 +338,11 @@ void ResizingTextEdit::insertFromMimeData(const QMimeData *source)
     insertPlainText(source->text());
 }
 
+void ResizingTextEdit::contextMenuEvent(QContextMenuEvent *event)
+{
+    QObjectPtr<QMenu> menu{this->createStandardContextMenu(event->pos())};
+    this->contextMenuRequested.invoke(menu.get(), event->pos());
+    menu->exec(event->globalPos());
+}
+
 }  // namespace chatterino

src/widgets/helper/ResizingTextEdit.hpp

@@ -21,6 +21,7 @@ public:
     pajlada::Signals::NoArgSignal focused;
     pajlada::Signals::NoArgSignal focusLost;
     pajlada::Signals::Signal<const QMimeData *> imagePasted;
+    pajlada::Signals::Signal<QMenu *, QPoint> contextMenuRequested;
 
     void setCompleter(QCompleter *c);
     /**
@@ -39,6 +40,8 @@ protected:
     bool canInsertFromMimeData(const QMimeData *source) const override;
     void insertFromMimeData(const QMimeData *source) override;
 
+    void contextMenuEvent(QContextMenuEvent *event) override;
+
 private:
     // hadSpace is set to true in case the "textUnderCursor" word was after a
     // space