Niji is an extensible theming framework that brings uniform, responsive and comfortable theming to the tinkerer's desktop. It currently comes with builtin support for gtk apps, sway, hyprland, kitty, and others, but it also allows you to easily add custom modules for anything you desire. Happy hacking!

This preview shows niji theming hyprland, hyprpaper, waybar, kitty, and nautilus. It is also theming some other applications that aren't visible here, as indicated by the terminal output.

Currently, the only way of installing is to build from source. This is due to change when version 0.1 is published.

1. Clone the repository: git clone https://github.com/niko-roether/niji
2. Enter the repository: cd niji
3. Install using cargo: cargo install --path ./niji

The first step is picking the modules you'd like to use. Take a look at the built-in modules list A basic configuration for ~/.config/niji/config.toml might look like this:

modules = ["hyprland", "waybar"]

Technically, all other configuration options are optional, but it is a good idea to set a few other global options, like this:

modules = ["hyprland", "waybar"]

[global]
font_family = "Fira Sans"
cursor_theme = "Adwaita"
cursor_size = 22

You can list available themes using niji theme list, and preview them using niji theme show <name>. If you've picked one, apply it using niji theme set <name>.

The niji configuration file, ~/.config/niji/config.toml consists of two main parts; the program configuration and the module configuration. Any top-level configuration value that is not part of a section is considered to be program configuration.

You can use the following options to configure niji.

• modules: A list of the names of modules you want to activate. See the list of built-in modules for available names.
• disable_reloads: A list of the names of modules that you want to apply the theme to, but not automatically reload. This is useful in nonstandard use cases where the side effects of reloading may not be desired.

Anything in config.toml that is part of a section is considered to be module configuration. Config values in the special [global] section apply to all modules; for module-specific configuration use a section with the name of the module, like [waybar] for example.

Common global config options include:

Any of these config options can be applied per module as well. For module specific settings, see the list of modules, and their respective documentation.

A non-trivial example for config.toml might look like this:

modules = ["sway", "hyprland", "hyprpaper", "waybar", "kitty", "swaylock"]
disable_reloads = ["sway"]

[global]
font_family = "Fira Sans"
font_scale = 1.2
cursor_theme = "Bibata-Modern-Classic"
cursor_size = 22

[waybar]
icon_font = "Material Design Icons"

Some modules support the global wallpaper configuration option, which allows you to configure a wallpaper to use per theme. If you have one of those modules enabled, you can add a [global.wallpaper] section to you config.toml, and set themes like this:

[global.wallpaper]
default = "./wallpapers/wp1.png"
tokyonight = "./wallpapers/wp2.png"
dracula = "./wallpapers/wp3.png"

As you might expect, niji will use the wallpaper set for the name of the current theme if it exists, and otherwise the default wallpaper as a fallback.

Niji comes with the following modules built-in:

• gtk Theming gtk3 and gtk4 applications.
• hyprland Theming Hyprland window decorations.
• hyprpaper Setting wallpapers with hyprpaper. See Setting Wallpapers per Theme.