Add support for system theme (#245)

* Add support for 'system' theme value

* Add ability to set theme to 'system' in settings

* Fix tsc errors for Theme

src/App.tsx

@@ -19,7 +19,7 @@ import {
   lineHighlightField,
   addLineHighlight,
 } from './editor/highlightextension'
-import { PaneType, Selections, useStore } from './useStore'
+import { PaneType, Selections, Themes, useStore } from './useStore'
 import { Logs, KCLErrors } from './components/Logs'
 import { CollapsiblePanel } from './components/CollapsiblePanel'
 import { MemoryPanel } from './components/MemoryPanel'
@@ -42,6 +42,7 @@ import {
 import { useHotkeys } from 'react-hotkeys-hook'
 import { TEST } from './env'
 import { getNormalisedCoordinates } from './lib/utils'
+import { getSystemTheme } from './lib/getSystemTheme'
 
 export function App() {
   const streamRef = useRef<HTMLDivElement>(null)
@@ -127,6 +128,8 @@ export function App() {
     streamDimensions: s.streamDimensions,
   }))
 
+  const editorTheme = theme === Themes.System ? getSystemTheme() : theme
+
   // Pane toggling keyboard shortcuts
   const togglePane = useCallback(
     (newPane: PaneType) =>
@@ -460,26 +463,26 @@ export function App() {
                 ]}
                 onChange={onChange}
                 onUpdate={onUpdate}
-                theme={theme}
+                theme={editorTheme}
                 onCreateEditor={(_editorView) => setEditorView(_editorView)}
               />
             </div>
           </CollapsiblePanel>
           <section className="flex flex-col">
             <MemoryPanel
-              theme={theme}
+              theme={editorTheme}
               open={openPanes.includes('variables')}
               title="Variables"
               icon={faSquareRootVariable}
             />
             <Logs
-              theme={theme}
+              theme={editorTheme}
               open={openPanes.includes('logs')}
               title="Logs"
               icon={faCodeCommit}
             />
             <KCLErrors
-              theme={theme}
+              theme={editorTheme}
               open={openPanes.includes('kclErrors')}
               title="KCL Errors"
               iconClassNames={{ icon: 'group-open:text-destroy-30' }}

src/components/Logs.tsx

@@ -1,15 +1,15 @@
 import ReactJson from 'react-json-view'
 import { useEffect } from 'react'
-import { useStore } from '../useStore'
+import { Themes, useStore } from '../useStore'
 import { CollapsiblePanel, CollapsiblePanelProps } from './CollapsiblePanel'
 
 const ReactJsonTypeHack = ReactJson as any
 
 interface LogPanelProps extends CollapsiblePanelProps {
-  theme?: 'light' | 'dark'
+  theme?: Exclude<Themes, Themes.System>
 }
 
-export const Logs = ({ theme = 'light', ...props }: LogPanelProps) => {
+export const Logs = ({ theme = Themes.Light, ...props }: LogPanelProps) => {
   const { logs } = useStore(({ logs }) => ({
     logs,
   }))
@@ -42,7 +42,10 @@ export const Logs = ({ theme = 'light', ...props }: LogPanelProps) => {
   )
 }
 
-export const KCLErrors = ({ theme = 'light', ...props }: LogPanelProps) => {
+export const KCLErrors = ({
+  theme = Themes.Light,
+  ...props
+}: LogPanelProps) => {
   const { kclErrors } = useStore(({ kclErrors }) => ({
     kclErrors,
   }))

src/components/MemoryPanel.tsx

@@ -1,15 +1,15 @@
 import ReactJson from 'react-json-view'
 import { CollapsiblePanel, CollapsiblePanelProps } from './CollapsiblePanel'
-import { useStore } from '../useStore'
+import { Themes, useStore } from '../useStore'
 import { useMemo } from 'react'
 import { ProgramMemory } from '../lang/executor'
 
 interface MemoryPanelProps extends CollapsiblePanelProps {
-  theme?: 'light' | 'dark'
+  theme?: Exclude<Themes, Themes.System>
 }
 
 export const MemoryPanel = ({
-  theme = 'light',
+  theme = Themes.Light,
   ...props
 }: MemoryPanelProps) => {
   const { programMemory } = useStore((s) => ({

src/index.tsx

@@ -2,13 +2,15 @@ import ReactDOM from 'react-dom/client'
 import './index.css'
 import reportWebVitals from './reportWebVitals'
 import { Toaster } from 'react-hot-toast'
-import { useStore } from './useStore'
+import { Themes, useStore } from './useStore'
 import { Router } from './Router'
 import { HotkeysProvider } from 'react-hotkeys-hook'
+import { getSystemTheme } from './lib/getSystemTheme'
 
 const root = ReactDOM.createRoot(document.getElementById('root') as HTMLElement)
-function setThemeClass(state: Partial<{ theme: string }>) {
-  if (state.theme === 'dark') {
+function setThemeClass(state: Partial<{ theme: Themes }>) {
+  const systemTheme = state.theme === Themes.System && getSystemTheme()
+  if (state.theme === Themes.Dark || systemTheme === Themes.Dark) {
     document.body.classList.add('dark')
   } else {
     document.body.classList.remove('dark')

src/lib/getSystemTheme.ts

@@ -0,0 +1,9 @@
+import { Themes } from '../useStore'
+
+export function getSystemTheme(): Exclude<Themes, 'system'> {
+  return typeof window !== 'undefined' &&
+    'matchMedia' in window &&
+    window.matchMedia('(prefers-color-scheme: dark)').matches
+    ? Themes.Dark
+    : Themes.Light
+}

src/routes/Settings.tsx

@@ -6,7 +6,7 @@ import {
 import { ActionButton } from '../components/ActionButton'
 import { AppHeader } from '../components/AppHeader'
 import { open } from '@tauri-apps/api/dialog'
-import { baseUnits, useStore } from '../useStore'
+import { Themes, baseUnits, useStore } from '../useStore'
 import { useRef } from 'react'
 import { toast } from 'react-hot-toast'
 import { Toggle } from '../components/Toggle/Toggle'
@@ -184,21 +184,25 @@ export const Settings = () => {
           title="Editor Theme"
           description="Apply a light or dark theme to the editor"
         >
-          <Toggle
-            name="settings-theme"
-            offLabel="Dark"
-            onLabel="Light"
-            checked={theme === 'light'}
+          <select
+            id="settings-theme"
+            className="block w-full px-3 py-1 border border-chalkboard-30 bg-transparent"
+            value={theme}
             onChange={(e) => {
-              const newTheme = e.target.checked ? 'light' : 'dark'
-              setTheme(newTheme)
+              setTheme(e.target.value as Themes)
               toast.success(
-                newTheme.slice(0, 1).toLocaleUpperCase() +
-                  newTheme.slice(1) +
-                  ' mode activated'
+                'Theme changed to ' +
+                  e.target.value.slice(0, 1).toLocaleUpperCase() +
+                  e.target.value.slice(1)
               )
             }}
-          />
+          >
+            {Object.entries(Themes).map(([label, value]) => (
+              <option key={value} value={value}>
+                {label}
+              </option>
+            ))}
+          </select>
         </SettingsSection>
         <SettingsSection
           title="Onboarding"

src/useStore.ts

@@ -97,6 +97,11 @@ export type GuiModes =
     }
 
 type UnitSystem = 'imperial' | 'metric'
+export enum Themes {
+  Light = 'light',
+  Dark = 'dark',
+  System = 'system',
+}
 
 export const baseUnits: Record<UnitSystem, string[]> = {
   imperial: ['in', 'ft'],
@@ -204,8 +209,8 @@ export interface StoreState {
   setHomeShowMenu: (showMenu: boolean) => void
   onboardingStatus: string
   setOnboardingStatus: (status: string) => void
-  theme: 'light' | 'dark'
-  setTheme: (theme: 'light' | 'dark') => void
+  theme: Themes
+  setTheme: (theme: Themes) => void
   openPanes: PaneType[]
   setOpenPanes: (panes: PaneType[]) => void
   homeMenuItems: {
@@ -409,12 +414,7 @@ export const useStore = create<StoreState>()(
       setDefaultBaseUnit: (defaultBaseUnit) => set({ defaultBaseUnit }),
       onboardingStatus: '',
       setOnboardingStatus: (onboardingStatus) => set({ onboardingStatus }),
-      theme:
-        typeof window !== 'undefined' &&
-        'matchMedia' in window &&
-        window.matchMedia('(prefers-color-scheme: dark)').matches
-          ? 'dark'
-          : 'light',
+      theme: Themes.System,
       setTheme: (theme) => set({ theme }),
       openPanes: ['code'],
       setOpenPanes: (openPanes) => set({ openPanes }),