GODT-1329: Dark mode, with macOS autodetect.

internal/frontend/qt/frontend_settings.go

@@ -26,6 +26,7 @@ import (
 
 	"github.com/ProtonMail/proton-bridge/internal/config/settings"
 	"github.com/ProtonMail/proton-bridge/internal/frontend/clientconfig"
+	"github.com/ProtonMail/proton-bridge/internal/frontend/theme"
 	"github.com/ProtonMail/proton-bridge/pkg/keychain"
 	"github.com/ProtonMail/proton-bridge/pkg/ports"
 	"github.com/therecipe/qt/core"
@@ -184,3 +185,21 @@ func (f *FrontendQt) quit() {
 func (f *FrontendQt) guiReady() {
 	f.initializationDone.Do(f.initializing.Done)
 }
+
+func (f *FrontendQt) setColorScheme() {
+	current := f.settings.Get(settings.ColorScheme)
+	if !theme.IsAvailable(theme.Theme(current)) {
+		current = string(theme.DefaultTheme())
+		f.settings.Set(settings.ColorScheme, current)
+	}
+	f.qml.SetColorSchemeName(current)
+}
+
+func (f *FrontendQt) changeColorScheme(newScheme string) {
+	if !theme.IsAvailable(theme.Theme(newScheme)) {
+		f.log.WithField("scheme", newScheme).Warn("Color scheme not available")
+		return
+	}
+	f.settings.Set(settings.ColorScheme, newScheme)
+	f.setColorScheme()
+}

internal/frontend/qt/qml_backend.go

@@ -128,6 +128,8 @@ type QMLBackend struct {
 	_ core.QUrl `property:"releaseNotesLink"`
 	_ core.QUrl `property:"landingPageLink"`
 
+	_ string                                                           `property:"colorSchemeName"`
+	_ func(string)                                                     `slot:"changeColorScheme"`
 	_ string                                                           `property:"currentEmailClient"`
 	_ func()                                                           `slot:"updateCurrentMailClient"`
 	_ func(description, address, emailClient string, includeLogs bool) `slot:"reportBug"`
@@ -262,6 +264,14 @@ func (q *QMLBackend) setup(f *FrontendQt) {
 	// release notes link is set by update
 	f.setLicensePath()
 
+	f.setColorScheme()
+	q.ConnectChangeColorScheme(func(newScheme string) {
+		go func() {
+			defer f.panicHandler.HandlePanic()
+			f.changeColorScheme(newScheme)
+		}()
+	})
+
 	f.setCurrentEmailClient()
 	q.ConnectUpdateCurrentMailClient(func() {
 		go func() {