closeTab: show confirmation dialog when tab has multiple panes

doc/cascadia/profiles.schema.json

@@ -2658,6 +2658,11 @@
           "description": "When set to \"true\" closing a window with multiple tabs open will require confirmation.  When set to \"false\", the confirmation dialog will not appear.",
           "type": "boolean"
         },
+        "warning.confirmCloseAllPanes": {
+          "default": true,
+          "description": "When set to \"true\" closing a tab with multiple panes open will require confirmation.  When set to \"false\", the confirmation dialog will not appear.",
+          "type": "boolean"
+        },
         "useTabSwitcher": {
           "description": "[Deprecated] Replaced with the \"tabSwitcherMode\" setting.",
           "default": true,

src/cascadia/TerminalApp/Resources/en-US/Resources.resw

@@ -526,6 +526,18 @@
   <data name="CloseReadOnlyDialog.Content" xml:space="preserve">
     <value>You are about to close a read-only terminal. Do you wish to continue?</value>
   </data>
+  <data name="CloseTabWarningDialog.CloseButtonText" xml:space="preserve">
+    <value>Cancel</value>
+  </data>
+  <data name="CloseTabWarningDialog.Content" xml:space="preserve">
+    <value>This tab has multiple panes. Do you want to close all of them?</value>
+  </data>
+  <data name="CloseTabWarningDialog.PrimaryButtonText" xml:space="preserve">
+    <value>Close tab</value>
+  </data>
+  <data name="CloseTabWarningDialog.Title" xml:space="preserve">
+    <value>Warning</value>
+  </data>
   <data name="LargePasteDialog.CloseButtonText" xml:space="preserve">
     <value>Cancel</value>
   </data>

src/cascadia/TerminalApp/TabManagement.cpp

@@ -414,6 +414,21 @@ namespace winrt::TerminalApp::implementation
         }
 
         auto t = winrt::get_self<implementation::Tab>(tab);
+        if (t->GetLeafPaneCount() > 1 && _settings.GlobalSettings().ConfirmCloseAllPanes())
+        {
+            const auto weak = get_weak();
+
+            auto warningResult = co_await _ShowCloseTabWarningDialog();
+
+            strong = weak.get();
+
+            // If the user didn't explicitly click on close tab - leave
+            if (!strong || warningResult != ContentDialogResult::Primary)
+            {
+                co_return;
+            }
+        }
+
         auto actions = t->BuildStartupActions(BuildStartupKind::None);
         _AddPreviouslyClosedPaneOrTab(std::move(actions));
 

src/cascadia/TerminalApp/TerminalPage.cpp

@@ -913,6 +913,17 @@ namespace winrt::TerminalApp::implementation
         return _ShowDialogHelper(L"CloseReadOnlyDialog");
     }
 
+    // Method Description:
+    // - Displays a dialog to warn the user that they are about to close a tab with
+    //   multiple panes open. Once the user clicks the "Close tab" button, close the tab.
+    //   If "Cancel" is clicked, the dialog will close.
+    // - Only one dialog can be visible at a time. If another dialog is visible
+    //   when this is called, nothing happens. See _ShowDialog for details
+    winrt::Windows::Foundation::IAsyncOperation<ContentDialogResult> TerminalPage::_ShowCloseTabWarningDialog()
+    {
+        return _ShowDialogHelper(L"CloseTabWarningDialog");
+    }
+
     // Method Description:
     // - Displays a dialog to warn the user about the fact that the text that
     //   they are trying to paste contains the "new line" character which can

src/cascadia/TerminalApp/TerminalPage.h

@@ -304,6 +304,7 @@ namespace winrt::TerminalApp::implementation
         winrt::Windows::Foundation::IAsyncOperation<winrt::Windows::UI::Xaml::Controls::ContentDialogResult> _ShowQuitDialog();
         winrt::Windows::Foundation::IAsyncOperation<winrt::Windows::UI::Xaml::Controls::ContentDialogResult> _ShowCloseWarningDialog();
         winrt::Windows::Foundation::IAsyncOperation<winrt::Windows::UI::Xaml::Controls::ContentDialogResult> _ShowCloseReadOnlyDialog();
+        winrt::Windows::Foundation::IAsyncOperation<winrt::Windows::UI::Xaml::Controls::ContentDialogResult> _ShowCloseTabWarningDialog();
         winrt::Windows::Foundation::IAsyncOperation<winrt::Windows::UI::Xaml::Controls::ContentDialogResult> _ShowMultiLinePasteWarningDialog();
         winrt::Windows::Foundation::IAsyncOperation<winrt::Windows::UI::Xaml::Controls::ContentDialogResult> _ShowLargePasteWarningDialog();
 

src/cascadia/TerminalApp/TerminalPage.xaml

@@ -104,6 +104,12 @@
                        x:Load="False"
                        DefaultButton="Close" />
 
+        <ContentDialog x:Name="CloseTabWarningDialog"
+                       x:Uid="CloseTabWarningDialog"
+                       Grid.Row="2"
+                       x:Load="False"
+                       DefaultButton="Primary" />
+
         <ContentDialog x:Name="MultiLinePasteDialog"
                        x:Uid="MultiLinePasteDialog"
                        Grid.Row="2"

src/cascadia/TerminalSettingsEditor/InteractionViewModel.h

@@ -31,6 +31,7 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
         PERMANENT_OBSERVABLE_PROJECTED_SETTING(_GlobalSettings, SearchWebDefaultQueryUrl);
         PERMANENT_OBSERVABLE_PROJECTED_SETTING(_GlobalSettings, WordDelimiters);
         PERMANENT_OBSERVABLE_PROJECTED_SETTING(_GlobalSettings, ConfirmCloseAllTabs);
+        PERMANENT_OBSERVABLE_PROJECTED_SETTING(_GlobalSettings, ConfirmCloseAllPanes);
         PERMANENT_OBSERVABLE_PROJECTED_SETTING(_GlobalSettings, InputServiceWarning);
         PERMANENT_OBSERVABLE_PROJECTED_SETTING(_GlobalSettings, WarnAboutLargePaste);
         PERMANENT_OBSERVABLE_PROJECTED_SETTING(_GlobalSettings, WarnAboutMultiLinePaste);

src/cascadia/TerminalSettingsModel/GlobalAppSettings.idl

@@ -62,6 +62,7 @@ namespace Microsoft.Terminal.Settings.Model
         INHERITABLE_SETTING(NewTabPosition, NewTabPosition);
         INHERITABLE_SETTING(Boolean, ShowTitleInTitlebar);
         INHERITABLE_SETTING(Boolean, ConfirmCloseAllTabs);
+        INHERITABLE_SETTING(Boolean, ConfirmCloseAllPanes);
         INHERITABLE_SETTING(String, Language);
         INHERITABLE_SETTING(Microsoft.UI.Xaml.Controls.TabViewWidthMode, TabWidthMode);
         INHERITABLE_SETTING(Boolean, UseAcrylicInTabRow);

src/cascadia/TerminalSettingsModel/MTSMSettings.h

@@ -39,6 +39,7 @@ Author(s):
     X(Model::NewTabPosition, NewTabPosition, "newTabPosition", Model::NewTabPosition::AfterLastTab)                                                                                                   \
     X(bool, ShowTitleInTitlebar, "showTerminalTitleInTitlebar", true)                                                                                                                                 \
     X(bool, ConfirmCloseAllTabs, "warning.confirmCloseAllTabs", true)                                                                                                                                 \
+    X(bool, ConfirmCloseAllPanes, "warning.confirmCloseAllPanes", true)                                                                                                                               \
     X(Model::ThemePair, Theme, "theme")                                                                                                                                                               \
     X(hstring, Language, "language")                                                                                                                                                                  \
     X(winrt::Microsoft::UI::Xaml::Controls::TabViewWidthMode, TabWidthMode, "tabWidthMode", winrt::Microsoft::UI::Xaml::Controls::TabViewWidthMode::Equal)                                            \

src/cascadia/TerminalSettingsModel/defaults.json

@@ -25,6 +25,7 @@
 
     // Miscellaneous
     "confirmCloseAllTabs": true,
+    "confirmCloseAllPanes": true,
     "theme": "dark",
     "snapToGridOnResize": true,
     "disableAnimations": false,