add option to select dark theme for "System default" (#3325)

* add option to select dark theme for "System default"

* add release notes

* fix release notes

* update visual tests

packages/desktop-client/src/components/settings/Themes.tsx

-import React from 'react';
+import React, { type ReactNode } from 'react';
 
-import { type Theme } from 'loot-core/types/prefs';
+import { type DarkTheme, type Theme } from 'loot-core/types/prefs';
 
-import { themeOptions, useTheme, theme as themeStyle } from '../../style';
+import {
+  themeOptions,
+  useTheme,
+  theme as themeStyle,
+  usePreferredDarkTheme,
+  darkThemeOptions,
+} from '../../style';
+import { tokens } from '../../tokens';
 import { Select } from '../common/Select';
 import { Text } from '../common/Text';
+import { View } from '../common/View';
+import { useSidebar } from '../sidebar/SidebarProvider';
 
 import { Setting } from './UI';
 
+function Column({ title, children }: { title: string; children: ReactNode }) {
+  return (
+    <View
+      style={{
+        alignItems: 'flex-start',
+        flexGrow: 1,
+        gap: '0.5em',
+        width: '100%',
+      }}
+    >
+      <Text style={{ fontWeight: 500 }}>{title}</Text>
+      <View style={{ alignItems: 'flex-start', gap: '1em' }}>{children}</View>
+    </View>
+  );
+}
+
 export function ThemeSettings() {
+  const sidebar = useSidebar();
   const [theme, switchTheme] = useTheme();
+  const [darkTheme, switchDarkTheme] = usePreferredDarkTheme();
 
   return (
     <Setting
       primaryAction={
-        <Select<Theme>
-          onChange={value => {
-            switchTheme(value);
-          }}
-          value={theme}
-          options={themeOptions}
-          buttonStyle={{
-            ':hover': {
-              backgroundColor: themeStyle.buttonNormalBackgroundHover,
+        <View
+          style={{
+            flexDirection: 'column',
+            gap: '1em',
+            width: '100%',
+            [`@media (min-width: ${
+              sidebar.floating
+                ? tokens.breakpoint_small
+                : tokens.breakpoint_medium
+            })`]: {
+              flexDirection: 'row',
             },
           }}
-        />
+        >
+          <Column title="Theme">
+            <Select<Theme>
+              onChange={value => {
+                switchTheme(value);
+              }}
+              value={theme}
+              options={themeOptions}
+              buttonStyle={{
+                ':hover': {
+                  backgroundColor: themeStyle.buttonNormalBackgroundHover,
+                },
+              }}
+            />
+          </Column>
+          {theme === 'auto' && (
+            <Column title="Dark theme">
+              <Select<DarkTheme>
+                onChange={value => {
+                  switchDarkTheme(value);
+                }}
+                value={darkTheme}
+                options={darkThemeOptions}
+                buttonStyle={{
+                  ':hover': {
+                    backgroundColor: themeStyle.buttonNormalBackgroundHover,
+                  },
+                }}
+              />
+            </Column>
+          )}
+        </View>
       }
     >
       <Text>

packages/desktop-client/src/style/theme.tsx

@@ -2,7 +2,7 @@
 import { useEffect, useState } from 'react';
 
 import { isNonProductionEnvironment } from 'loot-core/src/shared/environment';
-import type { Theme } from 'loot-core/src/types/prefs';
+import type { DarkTheme, Theme } from 'loot-core/src/types/prefs';
 
 import { useGlobalPref } from '../hooks/useGlobalPref';
 
@@ -25,13 +25,25 @@ export const themeOptions = Object.entries(themes).map(
   ([key, { name }]) => [key, name] as [Theme, string],
 );
 
+export const darkThemeOptions = Object.entries({
+  dark: themes.dark,
+  midnight: themes.midnight,
+}).map(([key, { name }]) => [key, name] as [DarkTheme, string]);
+
 export function useTheme() {
   const [theme = 'light', setThemePref] = useGlobalPref('theme');
   return [theme, setThemePref] as const;
 }
 
+export function usePreferredDarkTheme() {
+  const [darkTheme = 'dark', setDarkTheme] =
+    useGlobalPref('preferredDarkTheme');
+  return [darkTheme, setDarkTheme] as const;
+}
+
 export function ThemeStyle() {
   const [theme] = useTheme();
+  const [darkThemePreference] = usePreferredDarkTheme();
   const [themeColors, setThemeColors] = useState<
     | typeof lightTheme
     | typeof darkTheme
@@ -42,9 +54,11 @@ export function ThemeStyle() {
 
   useEffect(() => {
     if (theme === 'auto') {
+      const darkTheme = themes[darkThemePreference];
+
       function darkThemeMediaQueryListener(event: MediaQueryListEvent) {
         if (event.matches) {
-          setThemeColors(themes['dark'].colors);
+          setThemeColors(darkTheme.colors);
         } else {
           setThemeColors(themes['light'].colors);
         }
@@ -59,7 +73,7 @@ export function ThemeStyle() {
       );
 
       if (darkThemeMediaQuery.matches) {
-        setThemeColors(themes['dark'].colors);
+        setThemeColors(darkTheme.colors);
       } else {
         setThemeColors(themes['light'].colors);
       }
@@ -73,7 +87,7 @@ export function ThemeStyle() {
     } else {
       setThemeColors(themes[theme].colors);
     }
-  }, [theme]);
+  }, [theme, darkThemePreference]);
 
   if (!themeColors) return null;
 

packages/loot-core/src/server/main.ts

@@ -1256,6 +1256,12 @@ handlers['save-global-prefs'] = async function (prefs) {
   if ('theme' in prefs) {
     await asyncStorage.setItem('theme', prefs.theme);
   }
+  if ('preferredDarkTheme' in prefs) {
+    await asyncStorage.setItem(
+      'preferred-dark-theme',
+      prefs.preferredDarkTheme,
+    );
+  }
   if ('serverSelfSignedCert' in prefs) {
     await asyncStorage.setItem(
       'server-self-signed-cert',
@@ -1272,12 +1278,14 @@ handlers['load-global-prefs'] = async function () {
     [, documentDir],
     [, encryptKey],
     [, theme],
+    [, preferredDarkTheme],
   ] = await asyncStorage.multiGet([
     'floating-sidebar',
     'max-months',
     'document-dir',
     'encrypt-key',
     'theme',
+    'preferred-dark-theme',
   ]);
   return {
     floatingSidebar: floatingSidebar === 'true' ? true : false,
@@ -1292,6 +1300,10 @@ handlers['load-global-prefs'] = async function () {
       theme === 'midnight'
         ? theme
         : 'auto',
+    preferredDarkTheme:
+      preferredDarkTheme === 'dark' || preferredDarkTheme === 'midnight'
+        ? preferredDarkTheme
+        : 'dark',
   };
 };
 

packages/loot-core/src/types/prefs.d.ts

@@ -83,11 +83,13 @@ export type LocalPrefs = SyncedPrefs &
   }>;
 
 export type Theme = 'light' | 'dark' | 'auto' | 'midnight' | 'development';
+export type DarkTheme = 'dark' | 'midnight';
 export type GlobalPrefs = Partial<{
   floatingSidebar: boolean;
   maxMonths: number;
   keyId?: string;
   theme: Theme;
+  preferredDarkTheme: DarkTheme;
   documentDir: string; // Electron only
   serverSelfSignedCert: string; // Electron only
 }>;

upcoming-release-notes/3325.md

+---
+category: Features
+authors: [tim-smart]
+---
+
+Add setting to set preferred dark theme for "System default" mode