/usr/share/zsh/functions/Misc/tetriscurses is in zsh-common 5.1.1-1ubuntu2.
This file is owned by root:root, with mode 0o644.
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# zcurses module, and also that the builtin tetris is sort of boring, so
# I figured I'd port it to curses. It works pretty well, but I noticed
# two problems with the zcurses module in the process:
#
# 1. the HAVE_USE_DEFAULT_COLORS define seems to never be defined?
#
# 2a. resizing the window causes 'zcurses input' to wait forever for a
# key, even with a timeout defined.
#
# Bart says:
# >This probably has something to do with the special-casing around wgetch()
# >for signals handled by the "trap" command. See the big comment in
# >Src/Modules/curses.c lines 1073-1103.
#
# >It may be problematic to mix curses with the generic signal handling in
# >the main shell. We may need to swap in a SIGWINCH handler wrapper while
# >the curses UI is active, and restore the main handler when leaving it.
#
# 2b. resizing the window doesn't cause an event while running the
# program, but if i resize before starting(?) i get an event RESIZE on
# my first input call.
#
# Bart says:
# >There's probably some state that needs to be cleared on entry to
# >zccmd_input() so that curses doesn't see something left over from the
# >previous signal. Unfortunately I don't know what that would be.
if (( $LINES < 22 || $COLUMNS < 46 )); then
echo >&2 'terminal needs to be at least 22 lines and 46 columns'
return
fi
emulate -L zsh
typeset -a tetris_shapes
tetris_shapes=(
0x0f00 0x4444 0x0f00 0x4444
0x4e00 0x4c40 0x0e40 0x4640
0x6600 0x6600 0x6600 0x6600
0x4620 0x6c00 0x4620 0x6c00
0x2640 0x6300 0x2640 0x6300
0x6440 0x8e00 0x44c0 0x0e20
0xc440 0x0e80 0x4460 0x2e00
)
typeset -A tetris_rotations
tetris_rotations=(
0x0f00 0x4444 0x4444 0x0f00
0x4e00 0x4c40 0x4c40 0x0e40 0x0e40 0x4640 0x4640 0x4e00
0x6600 0x6600
0x4620 0x6c00 0x6c00 0x4620
0x2640 0x6300 0x6300 0x2640
0x6440 0x8e00 0x8e00 0x44c0 0x44c0 0x0e20 0x0e20 0x6440
0xc440 0x0e80 0x0e80 0x4460 0x4460 0x2e00 0x2e00 0xc440
)
local tetris_vsz=20 tetris_hsz=11
local tetris_blankline=${(l:11:: :)}
local tetris_blankboard=${(j::):-${(l:11:: :)}${(s: :)^${(l:20:: :)}}}
local tetris_board=$tetris_blankboard
local tetris_score=0
local tetris_lines=0
local tetris_{block{,_next,_x,_y},i}
function __tetris-next-block {
tetris_block_next=$tetris_shapes[1+RANDOM%$#tetris_shapes]
}
function __tetris-new-block {
tetris_block=$tetris_block_next
__tetris-next-block
__tetris-draw-next-block
tetris_block_y=0
tetris_block_x=4
if ! __tetris-block-fits; then
__tetris-game-over
fi
__tetris-place-block "*"
}
function __tetris-left {
__tetris-place-block " "
(( tetris_block_x-- ))
__tetris-block-fits || (( tetris_block_x++ ))
__tetris-place-block "*"
}
function __tetris-right {
__tetris-place-block " "
(( tetris_block_x++ ))
__tetris-block-fits || (( tetris_block_x-- ))
__tetris-place-block "*"
}
function __tetris-rotate {
__tetris-place-block " "
local save_block=$tetris_block
tetris_block=$tetris_rotations[$tetris_block]
__tetris-block-fits || tetris_block=$save_block
__tetris-place-block "*"
}
function __tetris-drop {
__tetris-place-block " "
((tetris_block_y++))
while __tetris-block-fits; do
((tetris_block_y++))
((tetris_score+=2))
done
((tetris_block_y--))
__tetris-block-dropped
}
function __tetris-timeout {
__tetris-place-block " "
((tetris_block_y++))
if __tetris-block-fits; then
__tetris-place-block "*"
return
fi
((tetris_block_y--))
__tetris-block-dropped
}
function __tetris-block-dropped {
integer bonus=1
__tetris-place-block "O"
local fl=${tetris_blankline// /O} i=$((tetris_block_y*tetris_hsz))
repeat 4; do
if [[ $tetris_board[i+1,i+tetris_hsz] == $fl ]]; then
if (( fancygraphics )); then for char in {7..1}; do
tetris_board[i+1,i+tetris_hsz]=${tetris_blankline// /$char}
__tetris-render-screen
zcurses timeout score 50
zcurses input score
done; fi
tetris_board[i+1,i+tetris_hsz]=
tetris_board=$tetris_blankline$tetris_board
((tetris_score+=100*(bonus++*(tetris_lines/10+10))))
((tetris_lines+=1))
if ((tetris_lines % 10 == 0)); then
((timestep = timestep * 0.80))
fi
fi
((i += tetris_hsz))
done
__tetris-new-block
}
function __tetris-block-fits {
local y x i=$((1+tetris_block_y*tetris_hsz+tetris_block_x)) b=0x8000
for ((y=0; y!=4; y++)); do
for ((x=0; x!=4; x++)); do
if ((tetris_block&b)); then
((x+tetris_block_x >= 0)) || return 1
((x+tetris_block_x < tetris_hsz)) || return 1
((y+tetris_block_y >= 0)) || return 1
((y+tetris_block_y < tetris_vsz)) || return 1
[[ $tetris_board[i] == " " ]] || return 1
fi
((b >>= 1))
((i++))
done
((i+=tetris_hsz-4))
done
return 0
}
function __tetris-draw-next-block {
local tetris_preview
local y x i=1 b=0x8000
for ((y=0; y!=4; y++)); do
tetris_preview=" "
for ((x=0; x!=4; x++)); do
((tetris_block_next&b)) && tetris_preview[i]=\*
((b >>= 1))
((i++))
done
i=1
zcurses move preview $((y+1)) 1
zcurses string preview ${${${tetris_preview//O/$filled_block}//\*/$active_block}// / }
done
}
function __tetris-place-block {
local y x i=$((1+tetris_block_y*tetris_hsz+tetris_block_x)) b=0x8000
for ((y=0; y!=4; y++)); do
for ((x=0; x!=4; x++)); do
((tetris_block&b)) && tetris_board[i]=$1
((b >>= 1))
((i++))
done
((i+=tetris_hsz-4))
done
}
function __tetris-render-screen {
local i x piece
setopt localoptions histsubstpattern extendedglob
local -a match mbegin mend
local -A animation
animation=( 7 ▇▇ 6 ▆▆ 5 ▅▅ 4 ▄▄ 3 ▃▃ 2 ▂▂ 1 ▁▁ )
for (( i = 0; i < tetris_vsz; i++ )); do
zcurses move gamearea $(( i + 1 )) 1
zcurses string gamearea ${${${${${tetris_board[1+i*tetris_hsz,(i+1)*tetris_hsz]}//O/$filled_block}//\*/$active_block}// / }//(#b)([1-7])/$animation[$match[1]]}
done
zcurses clear score
zcurses move score 1 1
zcurses string score "Score: $tetris_score"$'\
'" Lines: $tetris_lines"$'\
'" Speed: ${timestep%.*} ms"
zcurses border gamearea
zcurses border score
zcurses border preview
zcurses refresh gamearea score preview $debug
}
function __tetris-game-over {
gameover=1
}
function __tetris-new-game {
gameover=0
timestep=1000
tetris_score=0
tetris_lines=0
__tetris-next-block
__tetris-new-block
__tetris-render-screen
}
function __tetris-game-over-screen {
__tetris-debug "Died with $tetris_score points!"
tetris_board=$tetris_blankboard
local text="You got $tetris_score points!"
local gameover_height=4 gameover_width=$(( $#text + 2 ))
zcurses addwin gameover $gameover_height $gameover_width \
$(( off_y + (game_height-gameover_height)/2 )) \
$(( off_x + (game_width+score_width-gameover_width)/2 ))
zcurses move gameover 1 1
zcurses string gameover $text
text='Play again? [yn]'
zcurses move gameover 2 $(( (gameover_width - $#text)/2 ))
zcurses string gameover $text
zcurses border gameover
keepplaying=
until [[ $keepplaying = [ynq] ]]; do
zcurses input gameover keepplaying
done
zcurses delwin gameover
zcurses refresh stdscr
zcurses timeout gamearea ${timestep%.*}
__tetris-new-game
}
function __tetris-debug {
if [[ -z $debug ]]; then
return
fi
zcurses scroll debug -1
zcurses move debug 0 0
zcurses string debug "$1"
}
function __tetris-remove-wins {
local delwin
local -a delwins
delwins=(gamearea score debug gameover help preview)
for delwin in ${delwins:*zcurses_windows}; do
zcurses delwin $delwin
done
}
function __tetris-help {
local i
local help_height=9 help_width=23
zcurses addwin help $help_height $help_width \
$(( off_y + (game_height - help_height) / 2 )) \
$(( off_x + (game_width + score_width - help_width) / 2 ))
zcurses move help 1 1
zcurses string help $'left: h, j, left\
right: right, n, l\
rotate: up, c, i\
soft drop: down, t, k\
hard drop: space\
quit: q\
press space to return'
zcurses border help
until [[ $i == [\ q] ]]; do
zcurses input help i
if [[ $i == q ]]; then
keepplaying=n
fi
done
zcurses delwin help
zcurses refresh stdscr
}
zmodload zsh/curses && {
zcurses init
__tetris-remove-wins
zcurses refresh
echoti civis
local debug=
if (( ${@[(I)--debug|-d]} )); then
debug=debug
fi
local off_x off_y
local game_height=22 game_width=25
local score_height=5 score_width=20
local preview_height=6 preview_width=10
local filled_block active_block
local fancygraphics
if zmodload zsh/langinfo && [[ $langinfo[CODESET] = UTF-8 ]]; then
filled_block=██
active_block=▒▒
fancygraphics=${@[(I)--silly]}
else
filled_block='[]'
active_block='()'
fancygraphics=0
fi
off_x=$(( (COLUMNS-game_width-score_width-1) / 2 ))
off_y=$(( (LINES-game_height) / 2 ))
zcurses clear stdscr redraw
zcurses refresh stdscr
zcurses addwin gamearea $game_height $game_width $off_y $off_x
zcurses scroll gamearea off
zcurses addwin score $score_height $score_width \
$off_y $(( off_x + game_width + 1 ))
zcurses scroll score off
zcurses addwin preview $preview_height $preview_width \
$(( off_y + score_height )) $(( off_x + game_width + 1 ))
zcurses scroll preview off
if [[ -n $debug ]]; then
zcurses addwin debug $(( game_height - score_height - preview_height - 1 )) \
$score_width \
$(( off_y + score_height + preview_height ))\
$(( off_x + game_width + 1 ))
fi
typeset -F SECONDS
local now prev timestep timeout key kkey keepplaying=y gameover=0
prev=$SECONDS
__tetris-new-game
zcurses timeout gamearea 0
while [[ $keepplaying == y ]]; do
if zcurses input gamearea key kkey; then
__tetris-debug "got input $key$kkey"
case $key$kkey in
LEFT|h|j) __tetris-left;;
RIGHT|n|l) __tetris-right;;
UP|c|i) __tetris-rotate;;
DOWN|t|k) __tetris-timeout; ((tetris_score++)); prev=$SECONDS;;
" ") __tetris-drop;;
q) break;;
F1|H) __tetris-help;;
esac
else
__tetris-debug "timed out"
__tetris-timeout
fi
now=$SECONDS
if (( prev + timestep/1000. < now )); then
(( prev += timestep/1000. ))
fi
timeout=${$(( 1000.*(prev + timestep/1000. - now) + 1 ))%.*}
if (( timeout < 0 )); then
__tetris-debug "BUG: timeout < 0"
timeout=${timestep%.*}
fi
zcurses timeout gamearea $timeout
__tetris-debug "timeout: $timeout"
__tetris-render-screen
if [[ $gameover == 1 ]]; then
__tetris-game-over-screen
fi
done
} always {
__tetris-remove-wins
echoti cnorm
zcurses end
}
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