libsingularity

A GTK4 application and widget framework for the Singularity Desktop Environment.

This project ships two libraries from one source tree:

Library	pkg-config	Contains	Depends on
libsingularity	singularity-1.0	GTK4 UI toolkit: widgets, windows, dialogs, editor, style/theme, plus pure UI helpers (ColorUtil, TilingLayout, GridLayout, HotCornerLogic)	gtk4, gtk4-layer-shell, gee, json-glib, libpeas, libsoup, gtksourceview
libsingularity-system	singularity-system-1.0	Headless system backends (no GTK): bluetooth, audio, power, brightness, network, datetime, locale, accounts, gamemode, night light, call monitor, now-playing, session, resource monitor, app-menu registrar, plus helpers (TimezoneUtil, InputSourceUtil, AutostartManager, HardwareInfo)	gio, gio-unix, gee, libpulse, gudev, upower-glib, libnm, libsoup

Both share the Singularity namespace. An app links only what it needs: a text editor links singularity-1.0 and never pulls in NetworkManager, PulseAudio or UPower; the desktop shell links both.

Requirements

UI toolkit (libsingularity):

• Meson >= 1.10
• Vala compiler
• GTK4 >= 4.6, gtk4-layer-shell >= 0.7
• libgee-0.8 >= 0.20, json-glib-1.0 >= 1.6, libpeas-2 >= 2.0, libsoup >= 3.0, gtksourceview-5 >= 5.0

System backends (libsingularity-system, only when -Dsystem=true, the default):

• gio-2.0, gio-unix-2.0, gee, libpulse, libpulse-mainloop-glib, gudev-1.0, upower-glib >= 0.99, libnm >= 1.0, libsoup >= 3.0

Build & Install

Full build (both libraries, the desktop's default):

meson setup build
meson compile -C build
meson install -C build

Standalone app that needs only the UI toolkit (skip the heavy system deps):

meson setup build -Dsystem=false

When libsingularity is vendored as a subproject, pass the option through from the parent:

meson setup build -Dlibsingularity:system=false

With -Dsystem=false the libsingularity-system target and its dependencies (libpulse, gudev, upower-glib) are not built or required at all.

Configuration

libsingularity reads desktop preferences from the dev.sinty.desktop GSettings schema. To use a custom schema, override it before constructing any Application:

Singularity.Runtime.desktop_settings_schema = "org.mydesktop.shell";
var app = new Singularity.Application("org.myapp.MyApp");
app.run(args);

License

LGPL-2.1-only, see LICENSE.