From 772ed3a7b7c41bc8c04feb6e6ae1638343dcbf15 Mon Sep 17 00:00:00 2001
From: Mike Griese <migrie@microsoft.com>
Date: Fri, 16 Dec 2022 09:36:08 -0800
Subject: [PATCH] Use mica in the SUI if mica is enabled in the theme (#14567)

Does what it says on the tin!
---
 .../TerminalSettingsEditor/MainPage.cpp       | 21 ++++++++++++++++++-
 .../TerminalSettingsEditor/MainPage.h         |  2 ++
 .../TerminalSettingsEditor/MainPage.xaml      |  4 ++++
 3 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/cascadia/TerminalSettingsEditor/MainPage.cpp b/src/cascadia/TerminalSettingsEditor/MainPage.cpp
index 6f7256597f..6a074b858f 100644
--- a/src/cascadia/TerminalSettingsEditor/MainPage.cpp
+++ b/src/cascadia/TerminalSettingsEditor/MainPage.cpp
@@ -55,7 +55,7 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
         _settingsClone{ settings.Copy() }
     {
         InitializeComponent();
-
+        _UpdateBackgroundForMica();
         _InitializeProfilesList();
 
         _colorSchemesPageVM = winrt::make<ColorSchemesPageViewModel>(_settingsClone);
@@ -102,6 +102,8 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
         _settingsSource = settings;
         _settingsClone = settings.Copy();
 
+        _UpdateBackgroundForMica();
+
         // Deduce information about the currently selected item
         IInspectable lastBreadcrumb;
         const auto size = _breadcrumbs.Size();
@@ -640,4 +642,21 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
         return SettingsNav().Background();
     }
 
+    // If the theme asks for Mica, then drop out our background, so that we
+    // can have mica too.
+    void MainPage::_UpdateBackgroundForMica()
+
+    {
+        const auto& theme = _settingsSource.GlobalSettings().CurrentTheme();
+
+        const auto bgKey = (theme.Window() != nullptr && theme.Window().UseMica()) ?
+                               L"SettingsPageMicaBackground" :
+                               L"SettingsPageBackground";
+
+        if (const auto bgColor = Resources().TryLookup(winrt::box_value(bgKey)))
+        {
+            SettingsNav().Background(winrt::WUX::Media::SolidColorBrush(winrt::unbox_value<Windows::UI::Color>(bgColor)));
+        }
+    }
+
 }
diff --git a/src/cascadia/TerminalSettingsEditor/MainPage.h b/src/cascadia/TerminalSettingsEditor/MainPage.h
index ba86c6d50f..e414e9f5f8 100644
--- a/src/cascadia/TerminalSettingsEditor/MainPage.h
+++ b/src/cascadia/TerminalSettingsEditor/MainPage.h
@@ -67,6 +67,8 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
         void _Navigate(hstring clickedItemTag, BreadcrumbSubPage subPage);
         void _Navigate(const Editor::ProfileViewModel& profile, BreadcrumbSubPage subPage, const bool focusDeleteButton = false);
 
+        void _UpdateBackgroundForMica();
+
         winrt::Microsoft::Terminal::Settings::Editor::ColorSchemesPageViewModel _colorSchemesPageVM{ nullptr };
 
         Windows::UI::Xaml::Data::INotifyPropertyChanged::PropertyChanged_revoker _profileViewModelChangedRevoker;
diff --git a/src/cascadia/TerminalSettingsEditor/MainPage.xaml b/src/cascadia/TerminalSettingsEditor/MainPage.xaml
index 719d1a6d57..739a961f5b 100644
--- a/src/cascadia/TerminalSettingsEditor/MainPage.xaml
+++ b/src/cascadia/TerminalSettingsEditor/MainPage.xaml
@@ -31,16 +31,20 @@
 
                         <ResourceDictionary x:Key="Dark">
                             <Color x:Key="SettingsPageBackground">#282828</Color>
+                            <Color x:Key="SettingsPageMicaBackground">#00000000</Color>
                         </ResourceDictionary>
 
                         <ResourceDictionary x:Key="Light">
                             <Color x:Key="SettingsPageBackground">#F9F9F9</Color>
+                            <Color x:Key="SettingsPageMicaBackground">#00000000</Color>
                         </ResourceDictionary>
 
                         <ResourceDictionary x:Key="HighContrast">
                             <!--  Define resources for HighContrast mode here  -->
                             <StaticResource x:Key="SettingsPageBackground"
                                             ResourceKey="SystemColorWindowColorBrush" />
+                            <StaticResource x:Key="SettingsPageMicaBackground"
+                                            ResourceKey="SystemColorWindowColorBrush" />
                         </ResourceDictionary>
 
                     </ResourceDictionary.ThemeDictionaries>