The Horizon UI is the wizard-style user interface component of Project Horizon. The system takes the input of the User and creates a HorizonScript. The resultant HorizonScript is either executed on the running system when started in an installation environment, or saved for later use when started in a runtime environment.

This section describes the boot-up and initialisation procedures for the Horizon UI Installation Environment.

If the User has specified to load firmware in the installation environment, the system shall install the linux-firmware package to the installation environment before eudev is started. The system shall detect all usable graphics adaptors present in the computer. If there are no usable graphics adaptors present, the system shall display a message that installation cannot continue, and allow the User to login to a virtual TTY or reboot the computer. If multiple graphics adaptors are present, the system shall attempt to determine which graphics adaptor has a monitor attached. If the determiniation is that multiple graphics adaptors have monitors attached, or it is indeterminiate which adaptor has a monitor attached, then the system shall prompt the User to choose which graphics adaptor to use for installation.

A User must determine what natural language they are most comfortable with using for installing Adélie Linux. The system will allow the User to select their preferred natural language from a list of the languages to which the system has been translated. Priority: Medium.

The system must have more than one language translation available for use.

The system shall present the User with a list of natural languages, in the form of: "Install Adélie using English", "Installer Adélie en français". For this screen only, the system shall present the "Next" button as a single right-facing arrow. The system shall not present the Cancel button on this screen. When the User chooses a language from the list, the system shall enable the Next button to be clicked.

language — The locale identifier of the chosen language.

The system will explain to the User an overview of the installation process, and introduce common UI elements. A User may choose to run a tool or proceed with the installation.

The system shall present the User with a greeting message including a high-level overview of the installation process. The system shall reassure the User that the installation process will not modify any data until the final step. The system shall describe the UI elements common to each screen, including the Help button, the Back/Next buttons, and the Cancel button. The system shall allow the User to start a tool from the following list before beginning the installation. A terminal. An external partition editor. A lightweight Web browser.

A User may have a keyboard that is not the Linux default of US QWERTY. As such, a User must be able to choose a keyboard layout that matches their hardware.

The system shall present the User with a list of available keyboard layouts. When the User selects a keyboard layout, the system shall load the keyboard layout and apply it. The system shall present an input box for the User to test their selected keyboard layout.

keymap — The identifier of the chosen keyboard layout.

A User may possess hardware that requires non-free binary firmware to operate. This screen will allow users the choice on whether to load such firmware or not. Note that this feature can be compiled out of Horizon UI, and can also be disabled at run-time with a configuration setting.

The system must have firmware support compiled in.

The system shall ask the User whether or not to load binary firmware, stressing that security-sensitive systems must not choose this option. If the User chooses to load binary firmware, the system shall add the APK Fission repository and the linux-firwmare package to the installed environment.

firmware — Whether to load firmware.

Most Users will want to configure a network connection on their computer. The system will allow the User to configure their wired or wireless network connection, including authentication information (wireless), IP v4 and v6 addressing, routing, and DNS.

The system must have at least one non-loopback network interface detected by the kernel.

The system shall ask the User whether they wish to use automatic addressing (DHCP), manual addressing, or disable network connectivity. If the User chooses to disable network connectivity, the system shall proceed to the System Metadata screen. If the computer has more than one network interface, the system shall prompt the User to choose which interface to use for installation. If the chosen network interface is a wireless network interface, the system shall display a Wireless Configuration screen. The system shall allow the User to disable wireless connectivity. If the User has chosen to disable wireless connectivity, and the computer has multiple network interfaces, the system shall start at UI.Network.ChooseIface again. If the User has chosen to disable wireless connectivity, and the computer only has wireless networking, the system shall prompt the User to confirm they wish to continue without networking. The system shall display a list of access points in range of the wireless interface for the User to select from. The system shall allow the User to input a custom access point name. If the chosen access point uses authentication, the system shall prompt the User for the requisite credentials. If the User inputs a custom access point name, the system shall prompt the User for the type of security used (or none) and requisite credentials. The system shall enable the Next button when an access point is selected or input, and the requisite credentials (if any) have been input. When the User chooses Next, the system shall attempt to connect to the specified wireless network. If an error occurs during wireless network connection, the system shall display a message explaning the error condition, and redisplay the Wireless Configuration screen. The system shall time out after waiting 15 seconds for the wireless network to connect, and consider a time out an error condition as specified in UI.Network.Wireless.Error. If the User selected automatic addressing, the system shall attempt to obtain an IPv4 address via DHCP and an IPv6 address via Router Advertisement and DHCPv6. If no IP address is obtained for v4 or v6 after 15 seconds, the system shall display a message that automatic configuration failed, and ask the user whether to retry the attempt, use manual addressing, or skip networking configuration. If the User selected manual address, the system shall prompt the User for the following information: Information Description IPv4 host address The address of this computer IPv4 subnet mask The subnet mask / prefix of the network IPv4 default gateway The router on the network IPv4 DNS resolver The DNS resolver to use on IPv4 networks; default to 9.9.9.9 IPv6 host address The address of this computer IPv6 network prefix The prefix of the network IPv6 default gateway The router on the network IPv6 DNS resolver The DNS resolver to use on IPv6 networks; default to 2620:fe::fe The system shall allow the User to test their network configuration by attempting to connect to distfiles.adelielinux.org. The system shall enable the Next button when either an IPv4 or IPv6 configuration is complete (address, subnet mask, gateway, DNS resolver).

A User needs to specify the timezone the computer will be running in, and the computer's name. The computer's name is used even on non-networked computers, for shell prompts and login screens. The system will also allow the User to ensure the current date and time are accurate.

The system shall display the date and time currently stored in the RTC (Real Time Clock), and allow the User to update the date and time stored in the RTC. The system shall allow the User to choose the time zone to use for time display. The system shall use UTC as the default time zone. The system shall allow the User to input the host name of the computer. The system shall provide a default host name for the User, calculated using the following rules: If the system is running in a non-installation environment, use "Adelie" and end calculation. If the system has a manufacturer available via DMI or similar API, use that name truncated to 11 characters. Otherwise, use "Adelie". If the system has a network adaptor installed, even if it is not configured for use, use the last six characters of the MAC address from the first network adaptor. Otherwise, use a random fruit name. The system shall ensure that the host name input by the User uses only valid characters for DNS names, and not accept characters that are invalid. The system shall enable the Next button when the host name field contains a valid name, and disable the Next button when it is empty.

timezone — The zoneinfo name of the system's timezone. Ex: Africa/Nairobi. hostname — The name of the system.

The system will let the User choose what packages and sets of packages to install on their computer.

The system shall allow the User to choose from one of three preset package sets, or to customise the packages installed. The system shall allow the User to choose the Standard preset, which uses adelie-base-posix as an anchor package, and includes the firefox-esr, libreoffice, thunderbird, and vlc packages, and the kde and x11 metapackages. The system shall allow the User to choose the Notebook preset, which includes the Standard preset and additional power management tools (UPower, pm-utils). The system shall allow the User to choose the Minimal preset, which uses adelie-base as an anchor package, and includes lxqt-desktop, featherpad, netsurf, xorg-apps, xorg-drivers, and xorg-server packages. The system shall allow the User to choose to customise the packages installed on their computer. The system shall enable the Next button when a selection is made. If the User chooses Custom from UI.Packages.SimpleSel, the system shall present the User with a list of packages and package sets and allow the User to choose any or all of the packages listed. The system shall display the disk space used by each selection, and the total required for installation. The system shall offer at least the following packages, with the following names, descriptions, and corresponding APK package names. Name Description APK name Firefox Web browser The most popular and powerful Web browser for Linux. Includes JavaScript and multimedia (audio/video) playback support. firefox-esr Netsurf Web browser Lightweight Web browser. Does not include JavaScript support. netsurf Thunderbird Email Read and compose email, and participate in newsgroups. thunderbird FeatherPad Lightweight text editor. featherpad LibreOffice Popular, extensible office suite. libreoffice: libreoffice-base, libreoffice-calc, libreoffice-draw, libreoffice-impress, libreoffice-math, libreoffice-writer VLC Media Player Popular multimedia player, including support for a wide variety of audio and video types. vlc KDE Applications A variety of applications including a word processor, media player, and many games. kde KDE Plasma Modern desktop environment with graphical effect support. plasma-desktop LXQt Desktop Environment Lightweight desktop environment using the Openbox window manager and Qt widgets. lxqt-desktop MATE Desktop Environment Traditional desktop environment based on the GNOME 2 look and feel. mate-complete XFCE Desktop Environment Desktop environment based on Gtk+. xfce-desktop Window Managers Individual window managers that are not part of a desktop environment. awesome, fluxbox, i3wm, icewm, openbox, spectrwm If the User has selected a package set or packages that will use more disk space than the computer has, the system shall prompt the User to confirm the selection and warn that installation may not be successful.

The Horizon Runner is the component of Project Horizon that configures a computer to match an input HorizonScript.