595 lines
19 KiB
Lua
595 lines
19 KiB
Lua
# .tlv file generated by https://github.com/akkartik/teliva
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# You may edit it if you are careful; however, you may see cryptic errors if you
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# violate Teliva's assumptions.
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#
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# .tlv files are representations of Teliva programs. Teliva programs consist of
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# sequences of definitions. Each definition is a table of key/value pairs. Keys
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# and values are both strings.
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#
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# Lines in .tlv files always follow exactly one of the following forms:
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# - comment lines at the top of the file starting with '#' at column 0
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# - beginnings of definitions starting with '- ' at column 0, followed by a
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# key/value pair
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# - key/value pairs consisting of ' ' at column 0, containing either a
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# spaceless value on the same line, or a multi-line value
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# - multiline values indented by more than 2 spaces, starting with a '>'
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#
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# If these constraints are violated, Teliva may unceremoniously crash. Please
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# report bugs at http://akkartik.name/contact
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- __teliva_timestamp: original
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str_helpers:
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>-- some string helpers from http://lua-users.org/wiki/StringIndexing
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>
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>-- index characters using []
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>getmetatable('').__index = function(str,i)
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> if type(i) == 'number' then
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> return str:sub(i,i)
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> else
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> return string[i]
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> end
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>end
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>
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>-- ranges using (), selected bytes using {}
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>getmetatable('').__call = function(str,i,j)
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> if type(i)~='table' then
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> return str:sub(i,j)
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> else
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> local t={}
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> for k,v in ipairs(i) do
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> t[k]=str:sub(v,v)
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> end
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> return table.concat(t)
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> end
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>end
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>
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>-- iterate over an ordered sequence
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>function q(x)
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> if type(x) == 'string' then
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> return x:gmatch('.')
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> else
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> return ipairs(x)
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> end
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>end
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>
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>-- insert within string
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>function string.insert(str1, str2, pos)
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> return str1:sub(1,pos)..str2..str1:sub(pos+1)
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>end
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>
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>function string.remove(s, pos)
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> return s:sub(1,pos-1)..s:sub(pos+1)
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>end
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>
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>function string.pos(s, sub)
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> return string.find(s, sub, 1, true) -- plain=true to disable regular expressions
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>end
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>
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>-- TODO: backport utf-8 support from Lua 5.3
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- __teliva_timestamp: original
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debugy:
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>debugy = 5
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- __teliva_timestamp: original
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dbg:
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>-- helper for debug by print; overlay debug information towards the right
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>-- reset debugy every time you refresh screen
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>function dbg(window, s)
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> local oldy = 0
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> local oldx = 0
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> oldy, oldx = window:getyx()
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> window:mvaddstr(debugy, 60, s)
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> debugy = debugy+1
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> window:mvaddstr(oldy, oldx, '')
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>end
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- __teliva_timestamp: original
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check:
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>function check(x, msg)
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> if x then
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> Window:addch('.')
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> else
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> print('F - '..msg)
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> print(' '..str(x)..' is false/nil')
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> teliva_num_test_failures = teliva_num_test_failures + 1
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> -- overlay first test failure on editors
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> if teliva_first_failure == nil then
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> teliva_first_failure = msg
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> end
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> end
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>end
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- __teliva_timestamp: original
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check_eq:
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>function check_eq(x, expected, msg)
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> if eq(x, expected) then
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> Window:addch('.')
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> else
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> print('F - '..msg)
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> print(' expected '..str(expected)..' but got '..str(x))
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> teliva_num_test_failures = teliva_num_test_failures + 1
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> -- overlay first test failure on editors
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> if teliva_first_failure == nil then
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> teliva_first_failure = msg
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> end
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> end
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>end
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- __teliva_timestamp: original
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eq:
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>function eq(a, b)
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> if type(a) ~= type(b) then return false end
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> if type(a) == 'table' then
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> if #a ~= #b then return false end
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> for k, v in pairs(a) do
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> if b[k] ~= v then
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> return false
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> end
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> end
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> for k, v in pairs(b) do
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> if a[k] ~= v then
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> return false
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> end
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> end
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> return true
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> end
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> return a == b
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>end
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- __teliva_timestamp: original
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str:
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>-- smarter tostring
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>-- slow; used only for debugging
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>function str(x)
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> if type(x) == 'table' then
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> local result = ''
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> result = result..#x..'{'
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> for k, v in pairs(x) do
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> result = result..str(k)..'='..str(v)..', '
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> end
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> result = result..'}'
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> return result
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> elseif type(x) == 'string' then
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> return '"'..x..'"'
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> end
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> return tostring(x)
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>end
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- __teliva_timestamp: original
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menu:
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>-- To show app-specific hotkeys in the menu bar, add hotkey/command
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>-- arrays of strings to the menu array.
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>menu = {}
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- __teliva_timestamp: original
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window:
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>-- constructor for fake screen and window
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>-- call it like this:
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>-- local w = window{
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>-- kbd=kbd('abc'),
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>-- scr=scr{h=5, w=4},
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>-- }
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>-- eventually it'll do everything a real ncurses window can
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>function window(h)
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> h.__index = h
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> setmetatable(h, h)
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> h.__index = function(table, key)
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> return rawget(h, key)
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> end
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> h.attrset = function(self, x)
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> self.scr.attrs = x
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> end
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> h.attron = function(self, x)
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> -- currently same as attrset since Lua 5.1 doesn't have bitwise operators
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> -- doesn't support multiple attrs at once
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>-- local old = self.scr.attrs
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>-- self.scr.attrs = old|x
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> self.scr.attrs = x
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> end
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> h.attroff = function(self, x)
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> -- currently borked since Lua 5.1 doesn't have bitwise operators
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> -- doesn't support multiple attrs at once
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>-- local old = self.scr.attrs
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>-- self.scr.attrs = old & (~x)
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> self.scr.attrs = curses.A_NORMAL
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> end
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> h.getch = function(self)
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> local c = table.remove(h.kbd, 1)
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> if c == nil then return c end
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> return string.byte(c) -- for verisimilitude with ncurses
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> end
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> h.addch = function(self, c)
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> local scr = self.scr
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> if c == '\n' then
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> scr.cursy = scr.cursy+1
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> scr.cursx = 0
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> return
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> end
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> if scr.cursy <= scr.h then
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> scr[scr.cursy][scr.cursx] = {data=c, attrs=scr.attrs}
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> scr.cursx = scr.cursx+1
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> if scr.cursx > scr.w then
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> scr.cursy = scr.cursy+1
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> scr.cursx = 1
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> end
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> end
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> end
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> h.addstr = function(self, s)
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> for i=1,s:len() do
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> self:addch(s[i])
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> end
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> end
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> h.mvaddch = function(self, y, x, c)
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> self.scr.cursy = y
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> self.scr.cursx = x
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> self:addch(c)
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> end
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> h.mvaddstr = function(self, y, x, s)
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> self.scr.cursy = y
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> self.scr.cursx = x
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> self:addstr(s)
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> end
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> h.clear = function(self)
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> clear_scr(self.scr)
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> end
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> h.refresh = function(self)
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> -- nothing
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> end
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> return h
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>end
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- __teliva_timestamp: original
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kbd:
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>function kbd(keys)
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> local result = {}
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> for i=1,keys:len() do
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> table.insert(result, keys[i])
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> end
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> return result
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>end
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- __teliva_timestamp: original
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scr:
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>function scr(props)
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> props.cursx = 1
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> props.cursy = 1
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> clear_scr(props)
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> return props
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>end
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- __teliva_timestamp: original
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clear_scr:
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>function clear_scr(props)
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> props.cursy = 1
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> props.cursx = 1
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> for y=1,props.h do
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> props[y] = {}
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> for x=1,props.w do
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> props[y][x] = {data=' ', attrs=curses.A_NORMAL}
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> end
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> end
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> return props
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>end
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- __teliva_timestamp: original
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check_screen:
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>function check_screen(window, contents, message)
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> local x, y = 1, 1
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> for i=1,contents:len() do
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> check_eq(window.scr[y][x].data, contents[i], message..'/'..y..','..x)
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> x = x+1
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> if x > window.scr.w then
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> y = y+1
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> x = 1
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> end
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> end
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>end
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>
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>-- putting it all together, an example test of both keyboard and screen
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>function test_check_screen()
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> local lines = {
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> c='123',
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> d='234',
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> a='345',
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> b='456',
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> }
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> local w = window{
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> kbd=kbd('abc'),
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> scr=scr{h=3, w=5},
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> }
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> local y = 1
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> while true do
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> local b = w:getch()
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> if b == nil then break end
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> w:mvaddstr(y, 1, lines[string.char(b)])
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> y = y+1
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> end
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> check_screen(w, '345 '..
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> '456 '..
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> '123 ',
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> 'test_check_screen')
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>end
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- __teliva_timestamp: original
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grid:
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>-- main data structure
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>grid = {}
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>for i=1,lines*4 do
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> grid[i] = {}
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> for j=1,cols*2 do
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> grid[i][j] = 0
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> end
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>end
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- __teliva_timestamp: original
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Window:
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>Window = curses.stdscr()
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>-- animation-based app
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>Window:nodelay(true)
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>curses.curs_set(0)
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>lines, cols = Window:getmaxyx()
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- __teliva_timestamp: original
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grid_char:
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>-- grab a 4x2 chunk of grid
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>function grid_char(line, col)
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> result = {}
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> for l, row in ipairs({unpack(grid, (line-1)*4+1, line*4)}) do
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> result[l] = {unpack(row, (col-1)*2+1, col*2)}
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> end
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> return result
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>end
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- __teliva_timestamp: original
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print_grid_char:
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>function print_grid_char(window, x)
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> result = {}
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> for l, row in ipairs(x) do
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> for c, val in ipairs(row) do
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> window:mvaddstr(l, c, val)
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> end
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> end
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> return result
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>end
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- __teliva_timestamp: original
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glyph:
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>-- look up the braille pattern corresponding to a 4x2 chunk of grid
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>-- https://en.wikipedia.org/wiki/Braille_Patterns
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>-- not obviously programmatic because Unicode added 4x2 after 3x2
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>glyph = {
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> 0x2800, 0x2801, 0x2802, 0x2803, 0x2804, 0x2805, 0x2806, 0x2807, 0x2840, 0x2841, 0x2842, 0x2843, 0x2844, 0x2845, 0x2846, 0x2847,
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> 0x2808, 0x2809, 0x280a, 0x280b, 0x280c, 0x280d, 0x280e, 0x280f, 0x2848, 0x2849, 0x284a, 0x284b, 0x284c, 0x284d, 0x284e, 0x284f,
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> 0x2810, 0x2811, 0x2812, 0x2813, 0x2814, 0x2815, 0x2816, 0x2817, 0x2850, 0x2851, 0x2852, 0x2853, 0x2854, 0x2855, 0x2856, 0x2857,
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> 0x2818, 0x2819, 0x281a, 0x281b, 0x281c, 0x281d, 0x281e, 0x281f, 0x2858, 0x2859, 0x285a, 0x285b, 0x285c, 0x285d, 0x285e, 0x285f,
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> 0x2820, 0x2821, 0x2822, 0x2823, 0x2824, 0x2825, 0x2826, 0x2827, 0x2860, 0x2861, 0x2862, 0x2863, 0x2864, 0x2865, 0x2866, 0x2867,
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> 0x2828, 0x2829, 0x282a, 0x282b, 0x282c, 0x282d, 0x282e, 0x282f, 0x2868, 0x2869, 0x286a, 0x286b, 0x286c, 0x286d, 0x286e, 0x286f,
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> 0x2830, 0x2831, 0x2832, 0x2833, 0x2834, 0x2835, 0x2836, 0x2837, 0x2870, 0x2871, 0x2872, 0x2873, 0x2874, 0x2875, 0x2876, 0x2877,
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> 0x2838, 0x2839, 0x283a, 0x283b, 0x283c, 0x283d, 0x283e, 0x283f, 0x2878, 0x2879, 0x287a, 0x287b, 0x287c, 0x287d, 0x287e, 0x287f,
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>
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> 0x2880, 0x2881, 0x2882, 0x2883, 0x2884, 0x2885, 0x2886, 0x2887, 0x28c0, 0x28c1, 0x28c2, 0x28c3, 0x28c4, 0x28c5, 0x28c6, 0x28c7,
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> 0x2888, 0x2889, 0x288a, 0x288b, 0x288c, 0x288d, 0x288e, 0x288f, 0x28c8, 0x28c9, 0x28ca, 0x28cb, 0x28cc, 0x28cd, 0x28ce, 0x28cf,
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> 0x2890, 0x2891, 0x2892, 0x2893, 0x2894, 0x2895, 0x2896, 0x2897, 0x28d0, 0x28d1, 0x28d2, 0x28d3, 0x28d4, 0x28d5, 0x28d6, 0x28d7,
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> 0x2898, 0x2899, 0x289a, 0x289b, 0x289c, 0x289d, 0x289e, 0x289f, 0x28d8, 0x28d9, 0x28da, 0x28db, 0x28dc, 0x28dd, 0x28de, 0x28df,
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> 0x28a0, 0x28a1, 0x28a2, 0x28a3, 0x28a4, 0x28a5, 0x28a6, 0x28a7, 0x28e0, 0x28e1, 0x28e2, 0x28e3, 0x28e4, 0x28e5, 0x28e6, 0x28e7,
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> 0x28a8, 0x28a9, 0x28aa, 0x28ab, 0x28ac, 0x28ad, 0x28ae, 0x28af, 0x28e8, 0x28e9, 0x28ea, 0x28eb, 0x28ec, 0x28ed, 0x28ee, 0x28ef,
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> 0x28b0, 0x28b1, 0x28b2, 0x28b3, 0x28b4, 0x28b5, 0x28b6, 0x28b7, 0x28f0, 0x28f1, 0x28f2, 0x28f3, 0x28f4, 0x28f5, 0x28f6, 0x28f7,
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> 0x28b8, 0x28b9, 0x28ba, 0x28bb, 0x28bc, 0x28bd, 0x28be, 0x28bf, 0x28f8, 0x28f9, 0x28fa, 0x28fb, 0x28fc, 0x28fd, 0x28fe, 0x28ff,
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>}
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- __teliva_timestamp: original
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utf8:
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>-- https://stackoverflow.com/questions/7983574/how-to-write-a-unicode-symbol-in-lua
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>function utf8(decimal)
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> local bytemarkers = { {0x7FF,192}, {0xFFFF,224}, {0x1FFFFF,240} }
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> if decimal<128 then return string.char(decimal) end
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> local charbytes = {}
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> for bytes,vals in ipairs(bytemarkers) do
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> if decimal<=vals[1] then
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> for b=bytes+1,2,-1 do
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> local mod = decimal%64
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> decimal = (decimal-mod)/64
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> charbytes[b] = string.char(128+mod)
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> end
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> charbytes[1] = string.char(vals[2]+decimal)
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> break
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> end
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> end
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> return table.concat(charbytes)
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>end
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- __teliva_timestamp: original
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grid_char_to_glyph_index:
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>-- convert a chunk of grid into a number
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>function grid_char_to_glyph_index(g)
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> return g[1][1] + g[2][1]*2 + g[3][1]*4 + g[4][1]*8 +
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> g[1][2]*16 + g[2][2]*32 + g[3][2]*64 + g[4][2]*128 +
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> 1 -- 1-indexing
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>end
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- __teliva_timestamp: original
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render:
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>function render(window)
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> window:clear()
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> window:attron(curses.color_pair(1))
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> for line=1,lines do
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> for col=1,cols do
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> window:addstr(utf8(glyph[grid_char_to_glyph_index(grid_char(line, col))]))
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> end
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> end
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> window:attroff(curses.color_pair(1))
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> window:refresh()
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>end
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- __teliva_timestamp: original
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state:
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>function state(line, col)
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> if line < 1 or line > #grid or col < 1 or col > #grid[1] then
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> return 0
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> end
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> return grid[line][col]
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>end
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- __teliva_timestamp: original
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num_live_neighbors:
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>function num_live_neighbors(line, col)
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> return state(line-1, col-1) + state(line-1, col) + state(line-1, col+1) +
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> state(line, col-1) + state(line, col+1) +
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> state(line+1, col-1) + state(line+1, col) + state(line+1, col+1)
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>end
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- __teliva_timestamp: original
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step:
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>function step()
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> local new_grid = {}
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> for line=1,#grid do
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> new_grid[line] = {}
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> for col=1,#grid[1] do
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> local n = num_live_neighbors(line, col)
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> if n == 3 then
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> new_grid[line][col] = 1
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> elseif n == 2 then
|
|
> new_grid[line][col] = grid[line][col]
|
|
> else
|
|
> new_grid[line][col] = 0
|
|
> end
|
|
> end
|
|
> end
|
|
> grid = new_grid
|
|
>end
|
|
- __teliva_timestamp: original
|
|
sleep:
|
|
>function sleep(a)
|
|
> local sec = tonumber(os.clock() + a);
|
|
> while (os.clock() < sec) do
|
|
> end
|
|
>end
|
|
- __teliva_timestamp: original
|
|
load_file:
|
|
>function load_file(window, fs, filename)
|
|
> local infile = start_reading(fs, filename)
|
|
> if infile == nil then return end
|
|
> local line_index = lines -- quarter of the way down in pixels
|
|
> while true do
|
|
> local line = infile.read()
|
|
> if line == nil then break end
|
|
> if line:sub(1,1) ~= '!' then -- comment; plaintext files can't have whitespace before comments
|
|
> local col_index = cols
|
|
> for c in line:gmatch(".") do
|
|
> if c == '\r' then break end -- DOS line ending
|
|
> if c == '.' then
|
|
> grid[line_index][col_index] = 0
|
|
> else
|
|
> grid[line_index][col_index] = 1
|
|
> end
|
|
> col_index = col_index+1
|
|
> end
|
|
> line_index = line_index+1
|
|
> end
|
|
> end
|
|
>end
|
|
- __teliva_timestamp: original
|
|
update:
|
|
>menu = {{"arrow", "pan"}}
|
|
>
|
|
>function update(window, c)
|
|
> if c == curses.KEY_LEFT then
|
|
> for i=1,lines*4 do
|
|
> for j=2,cols*2 do
|
|
> grid[i][j-1] = grid[i][j]
|
|
> end
|
|
> grid[i][cols*2] = 0
|
|
> end
|
|
> elseif c == curses.KEY_DOWN then
|
|
> for i=lines*4-1,1,-1 do
|
|
> for j=1,cols*2 do
|
|
> grid[i+1][j] = grid[i][j]
|
|
> end
|
|
> end
|
|
> for j=1,cols*2 do
|
|
> grid[1][j] = 0
|
|
> end
|
|
> elseif c == curses.KEY_UP then
|
|
> for i=2,lines*4 do
|
|
> for j=1,cols*2 do
|
|
> grid[i-1][j] = grid[i][j]
|
|
> end
|
|
> end
|
|
> for j=1,cols*2 do
|
|
> grid[lines*4][j] = 0
|
|
> end
|
|
> elseif c == curses.KEY_RIGHT then
|
|
> for i=1,lines*4 do
|
|
> for j=cols*2-1,1,-1 do
|
|
> grid[i][j+1] = grid[i][j]
|
|
> end
|
|
> grid[i][1] = 0
|
|
> end
|
|
> end
|
|
>end
|
|
- __teliva_timestamp: original
|
|
main:
|
|
>function main()
|
|
> curses.init_pair(1, 22, 189)
|
|
>
|
|
> -- initialize grid based on commandline args
|
|
> if (#arg == 0) then
|
|
> -- by default, start from a deterministically random state
|
|
> for i=1,lines*4 do
|
|
> for j=1,cols*2 do
|
|
> grid[i][j] = math.random(0, 1)
|
|
> end
|
|
> end
|
|
> elseif arg[1] == "random" then
|
|
> -- start from a non-deterministically random start state
|
|
> math.randomseed(os.time())
|
|
> for i=1,lines*4 do
|
|
> for j=1,cols*2 do
|
|
> grid[i][j] = math.random(0, 1)
|
|
> end
|
|
> end
|
|
> -- shortcuts for some common patterns
|
|
> elseif arg[1] == "pentomino" then
|
|
> -- https://www.conwaylife.com/wiki/Pentomino
|
|
> grid[83][172] = 1
|
|
> grid[83][173] = 1
|
|
> grid[84][173] = 1
|
|
> grid[84][174] = 1
|
|
> grid[85][173] = 1
|
|
> elseif arg[1] == "glider" then
|
|
> -- https://www.conwaylife.com/wiki/Glider
|
|
> grid[5][4] = 1
|
|
> grid[6][5] = 1
|
|
> grid[7][3] = 1
|
|
> grid[7][4] = 1
|
|
> grid[7][5] = 1
|
|
> elseif arg[1] == "blinker" then
|
|
> -- https://www.conwaylife.com/wiki/Blinker
|
|
> grid[7][3] = 1
|
|
> grid[7][4] = 1
|
|
> grid[7][5] = 1
|
|
> elseif arg[1] == "block" then
|
|
> -- https://www.conwaylife.com/wiki/Block
|
|
> grid[5][4] = 1
|
|
> grid[5][5] = 1
|
|
> grid[6][4] = 1
|
|
> grid[6][5] = 1
|
|
> elseif arg[1] == "loaf" then
|
|
> -- https://www.conwaylife.com/wiki/Loaf
|
|
> grid[5][4] = 1
|
|
> grid[5][5] = 1
|
|
> grid[6][6] = 1
|
|
> grid[7][6] = 1
|
|
> grid[8][5] = 1
|
|
> grid[7][4] = 1
|
|
> grid[6][3] = 1
|
|
> else
|
|
> -- Load a file in the standard "plaintext" format: https://www.conwaylife.com/wiki/Plaintext
|
|
> --
|
|
> -- Each pattern page at https://www.conwaylife.com/wiki provides its
|
|
> -- plaintext representation in a block called "Pattern Files" on the right.
|
|
> --
|
|
> -- For example, check out the list of Important Patterns at
|
|
> -- https://www.conwaylife.com/wiki/Category:Patterns_with_Catagolue_frequency_class_0
|
|
> load_file(Window, nil, arg[1])
|
|
> end
|
|
>
|
|
> -- main loop
|
|
> while true do
|
|
> render(Window)
|
|
> c = Window:getch()
|
|
> update(Window, c)
|
|
> step()
|
|
> end
|
|
>end
|
|
- __teliva_timestamp:
|
|
>Thu Feb 17 19:58:19 2022
|
|
doc:blurb:
|
|
>Conway's Game of Life
|
|
>
|
|
>To get around limitations of text mode we use the braille character set to render 8 cells per character.
|
|
>
|
|
>By default it initializes the space with a random state of cells. You can also start it up with .cells files from https://conwaylife.com/wiki, or with a few special names:
|
|
> $ src/teliva life.tlv block
|
|
> $ src/teliva life.tlv loaf
|
|
> $ src/teliva life.tlv blinker
|
|
> $ src/teliva life.tlv glider
|
|
> $ src/teliva life.tlv pentomino
|