Keyboard integration for Streamlink quality confirmation (#3169)

Co-authored-by: zneix <zneix@zneix.eu>

src/widgets/BasePopup.cpp

@@ -1,5 +1,7 @@
 #include "widgets/BasePopup.hpp"
 
+#include <QAbstractButton>
+#include <QDialogButtonBox>
 #include <QKeyEvent>
 
 namespace chatterino {
@@ -20,4 +22,66 @@ void BasePopup::keyPressEvent(QKeyEvent *e)
     BaseWindow::keyPressEvent(e);
 }
 
+bool BasePopup::handleEscape(QKeyEvent *e, QDialogButtonBox *buttonBox)
+{
+    assert(buttonBox != nullptr);
+
+    if (e->key() == Qt::Key_Escape)
+    {
+        auto buttons = buttonBox->buttons();
+        for (auto *button : buttons)
+        {
+            if (auto role = buttonBox->buttonRole(button);
+                role == QDialogButtonBox::ButtonRole::RejectRole)
+            {
+                button->click();
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+bool BasePopup::handleEnter(QKeyEvent *e, QDialogButtonBox *buttonBox)
+{
+    assert(buttonBox != nullptr);
+
+    if (!e->modifiers() ||
+        (e->modifiers() & Qt::KeypadModifier && e->key() == Qt::Key_Enter))
+    {
+        switch (e->key())
+        {
+            case Qt::Key_Enter:
+            case Qt::Key_Return: {
+                auto buttons = buttonBox->buttons();
+                QAbstractButton *acceptButton = nullptr;
+                for (auto *button : buttons)
+                {
+                    if (button->hasFocus())
+                    {
+                        button->click();
+                        return true;
+                    }
+
+                    if (auto role = buttonBox->buttonRole(button);
+                        role == QDialogButtonBox::ButtonRole::AcceptRole)
+                    {
+                        acceptButton = button;
+                    }
+                }
+
+                if (acceptButton != nullptr)
+                {
+                    acceptButton->click();
+                    return true;
+                }
+            }
+            break;
+        }
+    }
+
+    return false;
+}
+
 }  // namespace chatterino