Add GTK application implementation

internal/gui/application.go

@@ -0,0 +1,151 @@
+package gui
+
+import (
+	"log"
+	"os"
+
+	"github.com/diamondburned/gotk4-adwaita/pkg/adw"
+	"github.com/diamondburned/gotk4/pkg/gdk/v4"
+	"github.com/diamondburned/gotk4/pkg/gio/v2"
+	"github.com/diamondburned/gotk4/pkg/glib/v2"
+	"github.com/diamondburned/gotk4/pkg/gtk/v4"
+	"suruatoel.xyz/mcg/data"
+	"suruatoel.xyz/mcg/internal/client"
+	"suruatoel.xyz/mcg/internal/i18n"
+)
+
+type Application struct {
+	*gtk.Application
+	window      *mainWindow
+	aboutDialog *adw.AboutDialog
+	config      Configuration
+	configErr   error
+}
+
+func NewApplication() *Application {
+	app := Application{
+		Application: gtk.NewApplication("xyz.suruatoel.mcg", gio.ApplicationFlagsNone),
+	}
+	app.ConnectStartup(app.onStartup)
+	app.ConnectActivate(app.onActivate)
+	app.ConnectShutdown(app.onShutdown)
+
+	return &app
+}
+
+func (a *Application) onStartup() {
+	a.setDefaultSettings()
+	a.loadCSS()
+	a.registerShortcuts()
+	a.registerActions()
+	a.loadConfig()
+}
+
+func (a *Application) loadConfig() {
+	a.config = Configuration{
+		Host:      "localhost",
+		Port:      6600,
+		Panel:     "library",
+		SortField: "year",
+		SortDesc:  false,
+	}
+
+	a.configErr = readConfig(&a.config)
+}
+
+func (a *Application) setDefaultSettings() {
+	styleManager := adw.StyleManagerGetDefault()
+	styleManager.SetColorScheme(adw.ColorSchemePreferDark)
+}
+
+func (a *Application) loadCSS() {
+	styleProvider := gtk.NewCSSProvider()
+	styleProvider.LoadFromString(data.MainCSS)
+
+	gtk.StyleContextAddProviderForDisplay(
+		gdk.DisplayGetDefault(),
+		styleProvider,
+		gtk.STYLE_PROVIDER_PRIORITY_APPLICATION,
+	)
+}
+
+func (a *Application) registerShortcuts() {
+	a.SetAccelsForAction("window.close", []string{"<primary>q"})
+	a.SetAccelsForAction("win.show-help-overlay", []string{"<primary>k"})
+	a.SetAccelsForAction("app.info", []string{"<primary>i"})
+	a.SetAccelsForAction("win.connect", []string{"<primary>c"})
+	a.SetAccelsForAction("win.play", []string{"<primary>p"})
+	a.SetAccelsForAction("win.clear-playlist", []string{"<primary>r"})
+	a.SetAccelsForAction("win.toggle-fullscreen", []string{"F11"})
+	a.SetAccelsForAction("win.search-library", []string{"<primary>f"})
+	a.SetAccelsForAction("win.panel(\"server\")", []string{"<primary>KP_1"})
+	a.SetAccelsForAction("win.panel(\"cover\")", []string{"<primary>KP_2"})
+	a.SetAccelsForAction("win.panel(\"playlist\")", []string{"<primary>KP_3"})
+	a.SetAccelsForAction("win.panel(\"library\")", []string{"<primary>KP_4"})
+}
+
+func (a *Application) registerActions() {
+	infoAction := gio.NewSimpleAction("info", nil)
+	infoAction.ConnectActivate(func(_ *glib.Variant) {
+		a.showAboutDialog()
+	})
+	a.AddAction(infoAction)
+}
+
+func (a *Application) showAboutDialog() {
+	if a.aboutDialog == nil {
+		a.aboutDialog = a.newAboutDialog()
+	}
+
+	a.aboutDialog.Present(a.window)
+}
+
+func (a *Application) newAboutDialog() *adw.AboutDialog {
+	dialog := adw.NewAboutDialog()
+	dialog.SetApplicationName("CoverGrid")
+	dialog.SetApplicationIcon("xyz.suruatoel.mcg")
+	dialog.SetVersion(a.Version())
+	dialog.SetComments(i18n.T("CoverGrid is a client for the Music Player Daemon, focusing on albums instead of single tracks."))
+	dialog.SetWebsite("https://www.suruatoel.xyz/codes/mcg")
+	dialog.SetLicenseType(gtk.LicenseGPL30)
+	dialog.SetIssueURL("https://git.suruatoel.xyz/coderkun/mcg")
+
+	return dialog
+}
+
+func (a *Application) onActivate() {
+	if a.window == nil {
+		a.window = newMainWindow(a.Application, a.config)
+		if a.configErr != nil && !os.IsNotExist(a.configErr) {
+			a.window.SetConfigError(a.configErr)
+		}
+		a.window.ConnectCloseRequest(a.onCloseRequest)
+	}
+
+	a.window.Present()
+	if a.config.IsConnected {
+		client.Instance().Connect(a.config.Host, int(a.config.Port), a.config.Password)
+	}
+}
+
+func (a *Application) onCloseRequest() bool {
+	a.window.UpdateConfig(&a.config)
+	a.config.IsConnected = client.Instance().IsConnected()
+
+	a.saveConfig()
+
+	return false
+}
+
+func (a *Application) saveConfig() {
+	err := writeConfig(&a.config)
+	if err != nil {
+		log.Println("failed to save configuration file:", err)
+	}
+}
+
+func (a *Application) onShutdown() {
+	if client.Instance().IsConnected() {
+		client.Instance().Disconnect()
+	}
+}