This change adds the display(1) graphical user interface and desktop environment with basic windowing support and the graphical terminal(1) emulator along with integrations in chkblayout(1), chvideomode(1), sysinstall(8), sysupgrade(8), as well as the games and ports. Adopt the Aurora procedural wallpaper in display(1) and login(8). Remove the obsolete dispd. Juhani contributed keyboard and video mode APIs to the display protocol and other miscellaneous changes. dzwdz contributed the initial functioning window buttons, improved title bar, window tiling, and minor bug fixes Co-authored-by: Juhani Krekelä <juhani@krekelä.fi> Co-authored-by: dzwdz <kg67199@gmail.com>
183 lines
3.8 KiB
Groff
183 lines
3.8 KiB
Groff
.Dd June 11, 2023
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.Dt DISPLAY 1
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.Os
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.Sh NAME
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.Nm display
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.Nd desktop environment
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.Sh SYNOPSIS
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.Nm
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.Op Ar session ...
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.Sh DESCRIPTION
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.Nm
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is a desktop environment and windowing system compositor.
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Applications talk to the
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.Nm
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server process to receive user input and show their graphical user interfaces
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in windows.
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.Pp
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The user's preferred startup applications are launched on startup by launching
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the
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.Xr session
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program (if set) or otherwise the
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.Xr displayrc 5
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script in the background.
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.Pp
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.Nm
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exits when Control + Alt + Delete is pressed.
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.Pp
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The options are as follows:
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.Bl -tag -width "12345678"
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.It Fl m Ar mouse
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Use
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.Pa mouse
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device instead of
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.Pa /dev/mouse .
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.It Fl t Ar tty
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Use
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.Pa tty
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device instead of
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.Pa /dev/tty .
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.It Fl s Ar socket
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Listen on
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.Pa socket
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instead of
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.Pa /var/run/display .
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.El
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.Pp
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The keyboard shortcuts are as follows:
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.Bl -tag -width "Control + Alt + Delete"
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.It Alt + F4
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Quit the current window.
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.It Alt + F10
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Maximize (or restore) the current window.
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.It Alt + Tab
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Switch to the next window.
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.It Alt + Drag
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Drag the current window.
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.It Control + Alt + Delete
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Exit the desktop environment.
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.It Control + Alt + T
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Launch the
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.Xr terminal 1
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application.
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.It Super + Left
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Tile the current window leftwards.
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.It Super + Right
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Tile the current window rightwards.
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.It Super + Up
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Tile the current window upwards.
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.It Super + Down
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Tile the current window downwards.
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.It F11
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Grab input for the current window.
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.It F12
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Release the input grab on the current window.
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.El
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.Pp
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The mouse gestures are as follow:
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.Bl -bullet
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.It
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Clicking on a window brings it to the foreground.
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.It
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Dragging the window title bar moves the window.
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.It
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Double clicking on the window title bar maximizes (or restores) the window.
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.It
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Clicking on the rectangle icon in the title bar maximizes (or restores) the
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window.
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.It
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Clicking on the X icon in the title bar closes the window.
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.It
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Dragging the edges of a window resizes it.
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.It
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Windows can be tiled by moving them when the cursor meets the left, right, top,
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and bottom edges or any corner.
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.El
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.Pp
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The keyboard layout can be changed with the
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.Xr chkblayout 1
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program.
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The display resolution can be changed with the
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.Xr chvideomode 1
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program.
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.Sh ENVIRONMENT
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.Bl -tag -width "DISPLAY_SOCKET"
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.It Ev DISPLAY_SOCKET
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.Nm
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sets
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.Ev DISPLAY_SOCKET
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to the path of the
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.Xr unix 4
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socket where it listens for connections from applications.
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Applications use
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.Ev DISPLAY_SOCKET
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to connect to
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.Nm
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or
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.Pa /var/run/display
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by default.
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.El
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.Sh FILES
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.Bl -tag -width 12345678 -compact
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.It Pa ~/.displayrc , /etc/displayrc , /etc/default/displayrc
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.Xr displayrc 5
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script that spawns the user's preferred startup applications.
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.It Pa /var/run/display
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.Xr unix 4
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socket where
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.Nm
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listens for connections from applications, as advertised in the
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.Ev DISPLAY_SOCKET
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environment variable.
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.El
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.Sh ASYNCHRONOUS EVENTS
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.Bl -tag -width "SIGTERM"
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.It Dv SIGTERM
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Request daemon termination.
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.El
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.Sh EXIT STATUS
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.Nm
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runs as a
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.Xr daemon 7
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until stopped by
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.Dv SIGTERM ,
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the user explicitly exits the desktop environment, or an application asks
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it to exit.
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.Nm
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signals readiness on the
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.Ev READYFD
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file descriptor when the display server is ready to receive connections from
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applications.
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.Nm
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will exit non-zero on any fatal startup error.
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.Sh EXAMPLES
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.Nm
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can be selected as the user's graphical user interface with this executable
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.Pa ~/.session
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script:
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.Bd -literal -offset indent
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#!/bin/sh
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exec display
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.Ed
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.Pp
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.Xr chkblayout 1 ,
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.Xr chvideomode 1 ,
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.Xr display 1
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will run the
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.Xr displayrc 5
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script on startup, which can be used to start applications.
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.Sh SEE ALSO
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.Xr terminal 1 ,
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.Xr displayrc 5 ,
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.Xr session 5
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.Sh BUGS
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The following features are not yet implemented:
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.Bl -bullet -compact
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.It
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Windows cannot be minimized.
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.It
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Applications cannot receive mouse events.
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.It
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The wallpaper is random and cannot be controlled.
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.El
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