folderstabssettingspage: add 3 options for closing split view

There is one bool setting in Dolphin Interface->Folders&Tabs->Split_view
which determines which panel is closed on "Close split view" button
click (currently focused or unfocused one).

This commit replaces this setting with (enum-based) 3-state combo box.
Since now we can set "When closing a split view" action to:
 - Close the active pane
 - Close the inactive pane
 - Close the right pane

BUG: 464696
BUG: 186185

1 files changed, 14 insertions, 2 deletions

diff --git a/src/dolphintabpage.cpp b/src/dolphintabpage.cpp
index 1ceda7d9f..8373d17b8 100644
--- a/src/dolphintabpage.cpp
+++ b/src/dolphintabpage.cpp
@@ -139,16 +139,28 @@ void DolphinTabPage::setSplitViewEnabled(bool enabled, Animated animated, const
             std::swap(m_primaryViewContainer, m_secondaryViewContainer);
             m_primaryViewActive = !m_primaryViewActive;
         };
-        if (GeneralSettings::closeActiveSplitView()) {
+        using Choice = GeneralSettings::EnumCloseSplitViewChoice;
+        switch (GeneralSettings::closeSplitViewChoice()) {
+        case Choice::ActiveView:
             view = activeViewContainer();
             if (m_primaryViewActive) {
                 swapActiveView();
             }
-        } else {
+            break;
+        case Choice::InactiveView:
             view = m_primaryViewActive ? m_secondaryViewContainer : m_primaryViewContainer;
             if (!m_primaryViewActive) {
                 swapActiveView();
             }
+            break;
+        case Choice::RightView:
+            view = m_secondaryViewContainer;
+            if (!m_primaryViewActive) {
+                swapActiveView();
+            }
+            break;
+        default:
+            Q_UNREACHABLE();
         }
         m_primaryViewContainer->setActive(true);
         m_navigatorsWidget->followViewContainersGeometry(m_primaryViewContainer, nullptr);