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require 'curses'
require 'signal'
-- globals {{{
local map, rows, cols
local colors = {
"black", "green",
"red", "cyan",
"white", "magenta",
"blue", "yellow"
}
-- }}}
-- helpful functions {{{
local function pline(str)
curses.addstr({y = 0, x = 0}, str)
curses.clrtoeol()
end
local function botl(str)
curses.addstr({y = rows - 1, x = 0}, str)
curses.clrtoeol()
end
local function cleanup(sig)
curses.clear()
curses.endwin()
if sig then
signal.signal(sig, "default")
signal.raise(sig)
end
end
-- }}}
-- curses initialization {{{
curses.initscr();
curses.start_color();
curses.use_default_colors();
curses.setup_term{nl = false, cbreak = true, echo = false, keypad = true}
for _, color in ipairs(colors) do
curses.init_pair(color, color)
end
-- }}}
-- cleanup on signals {{{
signal.signal("TERM", cleanup)
signal.signal("INT", cleanup)
-- }}}
-- get the term size and the size of the map we want to draw {{{
rows, cols = curses.getmaxyx()
map = {ul = {x = 0, y = 1}, lr = {x = cols - 1, y = rows - 3}}
map.w = map.lr.x - map.ul.x + 1
map.h = map.lr.y - map.ul.y + 1
-- }}}
-- draw the screen {{{
curses.clear()
for i = map.ul.y, map.lr.y do
curses.addstr({y = i, x = map.ul.x}, ("."):rep(map.w))
end
-- }}}
-- initialize the character {{{
local char = {
x = math.random(map.ul.x, map.lr.x),
y = math.random(map.ul.y, map.lr.y),
move = function(self, offset)
if self.x + offset.x < map.ul.x or
self.x + offset.x > map.lr.x or
self.y + offset.y < map.ul.y or
self.y + offset.y > map.lr.y then
return 0
else
self.x = self.x + offset.x
self.y = self.y + offset.y
return 1
end
end,
draw = function(self)
curses.addch(self, "@", {bold = true})
curses.move(self)
end,
erase = function(self)
curses.addch(self, ".")
curses.move(self)
end
}
-- }}}
-- movement commands {{{
local directions = {
y = {x = -1, y = -1},
h = {x = -1, y = 0}, left = {x = -1, y = 0},
b = {x = -1, y = 1},
k = {x = 0, y = -1}, up = {x = 0, y = -1},
["."] = {x = 0, y = 0}, s = {x = 0, y = 0},
j = {x = 0, y = 1}, down = {x = 0, y = 1},
u = {x = 1, y = -1},
l = {x = 1, y = 0}, right = {x = 1, y = 0},
n = {x = 1, y = 1},
}
-- }}}
-- main loop {{{
local turns = 0
while true do
botl("T:" .. turns)
char:draw()
local c = curses.getch()
char:erase()
pline("")
if directions[c] then
turns = turns + char:move(directions[c])
elseif (c == "Q") then
break
else
if c == "\n" then c = "^J" end
if c == "\r" then c = "^M" end
pline("Unknown command '" .. c .. "'")
end
end
-- }}}
-- cleanup {{{
cleanup()
-- }}}
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