Graphics.Vty.Platform.Unix.Input.Terminfo

Queries the terminal for all capability-based input sequences and then adds on a terminal-dependent input sequence mapping.

For reference see:

• http://vimdoc.sourceforge.net/htmldoc/term.html

• vim74srcterm.c

• http://invisible-island.net/vttest/

• http://aperiodic.net/phil/archives/Geekery/term-function-keys.html

Terminfo is incomplete. The vim source implies that terminfo is also incorrect. Vty assumes that the internal terminfo table added to the system-provided terminfo table is correct.

The procedure used here is:

1. Build terminfo table for all caps. Missing caps are not added.

2. Add tables for visible chars, esc, del, ctrl, and meta.

3. Add internally-defined table for given terminal type.

Precedence is currently implicit in the compile algorithm.

Esc, meta-esc, delete, meta-delete, enter, meta-enter.

A classification table directly generated from terminfo cap strings. These are:

• ka1 - keypad up-left

• ka3 - keypad up-right

• kb2 - keypad center

• kbs - keypad backspace

• kbeg - begin

• kcbt - back tab

• kc1 - keypad left-down

• kc3 - keypad right-down

• kdch1 - delete

• kcud1 - down

• kend - end

• kent - enter

• kf0 - kf63 - function keys

• khome - KHome

• kich1 - insert

• kcub1 - left

• knp - next page (page down)

• kpp - previous page (page up)

• kcuf1 - right

• kDC - shift delete

• kEND - shift end

• kHOM - shift home

• kIC - shift insert

• kLFT - shift left

• kRIT - shift right

• kcuu1 - up

The key table applicable to all terminals.

Note that some of these entries are probably only applicable to ANSI/VT100 terminals.

Visible characters in the ISO-8859-1 and UTF-8 common set.

We limit to < 0xC1. The UTF8 sequence detector will catch all values 0xC2 and above before this classify table is reached.