# .tlv file generated by https://github.com/akkartik/teliva
# You may edit it if you are careful; however, you may see cryptic errors if you
# violate Teliva's assumptions.
#
# .tlv files are representations of Teliva programs. Teliva programs consist of
# sequences of definitions. Each definition is a table of key/value pairs. Keys
# and values are both strings.
#
# Lines in .tlv files always follow exactly one of the following forms:
# - comment lines at the top of the file starting with '#' at column 0
# - beginnings of definitions starting with '- ' at column 0, followed by a
# key/value pair
# - key/value pairs consisting of ' ' at column 0, containing either a
# spaceless value on the same line, or a multi-line value
# - multiline values indented by more than 2 spaces, starting with a '>'
#
# If these constraints are violated, Teliva may unceremoniously crash. Please
# report bugs at http://akkartik.name/contact
- __teliva_timestamp: original
str_helpers:
>-- some string helpers from http://lua-users.org/wiki/StringIndexing
>
>-- index characters using []
>getmetatable('').__index = function(str,i)
> if type(i) == 'number' then
> return str:sub(i,i)
> else
> return string[i]
> end
>end
>
>-- ranges using (), selected bytes using {}
>getmetatable('').__call = function(str,i,j)
> if type(i)~='table' then
> return str:sub(i,j)
> else
> local t={}
> for k,v in ipairs(i) do
> t[k]=str:sub(v,v)
> end
> return table.concat(t)
> end
>end
>
>-- iterate over an ordered sequence
>function q(x)
> if type(x) == 'string' then
> return x:gmatch('.')
> else
> return ipairs(x)
> end
>end
>
>-- insert within string
>function string.insert(str1, str2, pos)
> return str1:sub(1,pos)..str2..str1:sub(pos+1)
>end
>
>function string.remove(s, pos)
> return s:sub(1,pos-1)..s:sub(pos+1)
>end
>
>function string.pos(s, sub)
> return string.find(s, sub, 1, true) -- plain=true to disable regular expressions
>end
>
>-- TODO: backport utf-8 support from Lua 5.3
- __teliva_timestamp: original
debugy:
>debugy = 5
- __teliva_timestamp: original
dbg:
>-- helper for debug by print; overlay debug information towards the right
>-- reset debugy every time you refresh screen
>function dbg(window, s)
> local oldy = 0
> local oldx = 0
> oldy, oldx = window:getyx()
> window:mvaddstr(debugy, 60, s)
> debugy = debugy+1
> window:mvaddstr(oldy, oldx, '')
>end
- __teliva_timestamp: original
check:
>function check(x, msg)
> if x then
> Window:addch('.')
> else
> print('F - '..msg)
> print(' '..str(x)..' is false/nil')
> teliva_num_test_failures = teliva_num_test_failures + 1
> -- overlay first test failure on editors
> if teliva_first_failure == nil then
> teliva_first_failure = msg
> end
> end
>end
- __teliva_timestamp: original
check_eq:
>function check_eq(x, expected, msg)
> if eq(x, expected) then
> Window:addch('.')
> else
> print('F - '..msg)
> print(' expected '..str(expected)..' but got '..str(x))
> teliva_num_test_failures = teliva_num_test_failures + 1
> -- overlay first test failure on editors
> if teliva_first_failure == nil then
> teliva_first_failure = msg
> end
> end
>end
- __teliva_timestamp: original
eq:
>function eq(a, b)
> if type(a) ~= type(b) then return false end
> if type(a) == 'table' then
> if #a ~= #b then return false end
> for k, v in pairs(a) do
> if b[k] ~= v then
> return false
> end
> return true
> end
> end
> return a == b
>end
- __teliva_timestamp: original
str:
>-- smarter tostring
>-- slow; used only for debugging
>function str(x)
> if type(x) == 'table' then
> local result = ''
> result = result..#x..'{'
> for k, v in pairs(x) do
> result = result..str(k)..'='..str(v)..', '
> end
> result = result..'}'
> return result
> elseif type(x) == 'string' then
> return '"'..x..'"'
> end
> return tostring(x)
>end
- __teliva_timestamp: original
map:
>-- only for arrays
>function map(l, f)
> result = {}
> for _, x in ipairs(l) do
> table.insert(result, f(x))
> end
> return result
>end
- __teliva_timestamp: original
reduce:
>-- only for arrays
>function reduce(l, f, init)
> result = init
> for _, x in ipairs(l) do
> result = f(result, x)
> end
> return result
>end
- __teliva_timestamp: original
filter:
>-- only for arrays
>function filter(l, f)
> result = {}
> for _, x in ipairs(l) do
> if f(x) then
> table.insert(result, x)
> end
> end
> return result
>end
- __teliva_timestamp: original
find_index:
>function find_index(arr, x)
> for n, y in ipairs(arr) do
> if x == y then
> return n
> end
> end
>end
- __teliva_timestamp: original
trim:
>function trim(s)
> return s:gsub('^%s*', ''):gsub('%s*$', '')
>end
- __teliva_timestamp: original
split:
>function split(s, d)
> result = {}
> for match in (s..d):gmatch("(.-)"..d) do
> table.insert(result, match);
> end
> return result
>end
- __teliva_timestamp: original
sort_letters:
>function sort_letters(s)
> tmp = {}
> for i=1,#s do
> table.insert(tmp, s[i])
> end
> table.sort(tmp)
> local result = ''
> for _, c in pairs(tmp) do
> result = result..c
> end
> return result
>end
>
>function test_sort_letters(s)
> check_eq(sort_letters(''), '', 'test_sort_letters: empty')
> check_eq(sort_letters('ba'), 'ab', 'test_sort_letters: non-empty')
> check_eq(sort_letters('abba'), 'aabb', 'test_sort_letters: duplicates')
>end
- __teliva_timestamp: original
count_letters:
>function count_letters(s)
> local result = {}
> for i=1,s:len() do
> local c = s[i]
> if result[c] == nil then
> result[c] = 1
> else
> result[c] = result[c] + 1
> end
> end
> return result
>end
- __teliva_timestamp: original
append:
>-- concatenate list 'elems' into 'l', modifying 'l' in the process
>function append(l, elems)
> for i=1,#elems do
> l[#l+1] = elems[i]
> end
>end
- __teliva_timestamp: original
menu:
>-- To show app-specific hotkeys in the menu bar, add hotkey/command
>-- arrays of strings to the menu array.
>menu = {}
- __teliva_timestamp: original
Window:
>Window = curses.stdscr()
- __teliva_timestamp: original
window:
>-- constructor for fake screen and window
>-- call it like this:
>-- local w = window{
>-- kbd=kbd('abc'),
>-- scr=scr{h=5, w=4},
>-- }
>-- eventually it'll do everything a real ncurses window can
>function window(h)
> h.__index = h
> setmetatable(h, h)
> h.__index = function(table, key)
> return rawget(h, key)
> end
> h.attrset = function(self, x)
> self.scr.attrs = x
> end
> h.attron = function(self, x)
> -- currently same as attrset since Lua 5.1 doesn't have bitwise operators
> -- doesn't support multiple attrs at once
>-- local old = self.scr.attrs
>-- self.scr.attrs = old|x
> self.scr.attrs = x
> end
> h.attroff = function(self, x)
> -- currently borked since Lua 5.1 doesn't have bitwise operators
> -- doesn't support multiple attrs at once
>-- local old = self.scr.attrs
>-- self.scr.attrs = old & (~x)
> self.scr.attrs = curses.A_NORMAL
> end
> h.getch = function(self)
> local c = table.remove(h.kbd, 1)
> if c == nil then return c end
> return string.byte(c) -- for verisimilitude with ncurses
> end
> h.addch = function(self, c)
> local scr = self.scr
> if c == '\n' then
> scr.cursy = scr.cursy+1
> scr.cursx = 0
> return
> end
> if scr.cursy <= scr.h then
> scr[scr.cursy][scr.cursx] = {data=c, attrs=scr.attrs}
> scr.cursx = scr.cursx+1
> if scr.cursx > scr.w then
> scr.cursy = scr.cursy+1
> scr.cursx = 1
> end
> end
> end
> h.addstr = function(self, s)
> for i=1,s:len() do
> self:addch(s[i])
> end
> end
> h.mvaddch = function(self, y, x, c)
> self.scr.cursy = y
> self.scr.cursx = x
> self:addch(c)
> end
> h.mvaddstr = function(self, y, x, s)
> self.scr.cursy = y
> self.scr.cursx = x
> self:addstr(s)
> end
> h.clear = function(self)
> clear_scr(self.scr)
> end
> h.refresh = function(self)
> -- nothing
> end
> return h
>end
- __teliva_timestamp: original
kbd:
>function kbd(keys)
> local result = {}
> for i=1,keys:len() do
> table.insert(result, keys[i])
> end
> return result
>end
- __teliva_timestamp: original
scr:
>function scr(props)
> props.cursx = 1
> props.cursy = 1
> clear_scr(props)
> return props
>end
- __teliva_timestamp: original
clear_scr:
>function clear_scr(props)
> props.cursy = 1
> props.cursx = 1
> for y=1,props.h do
> props[y] = {}
> for x=1,props.w do
> props[y][x] = {data=' ', attrs=curses.A_NORMAL}
> end
> end
> return props
>end
- __teliva_timestamp: original
check_screen:
>function check_screen(window, contents, message)
> local x, y = 1, 1
> for i=1,contents:len() do
> check_eq(window.scr[y][x].data, contents[i], message..'/'..y..','..x)
> x = x+1
> if x > window.scr.w then
> y = y+1
> x = 1
> end
> end
>end
>
>-- putting it all together, an example test of both keyboard and screen
>function test_check_screen()
> local lines = {
> c='123',
> d='234',
> a='345',
> b='456',
> }
> local w = window{
> kbd=kbd('abc'),
> scr=scr{h=3, w=5},
> }
> local y = 1
> while true do
> local b = w:getch()
> if b == nil then break end
> w:mvaddstr(y, 1, lines[string.char(b)])
> y = y+1
> end
> check_screen(w, '345 '..
> '456 '..
> '123 ',
> 'test_check_screen')
>end
- __teliva_timestamp: original
check_reverse:
>function check_reverse(window, contents, message)
> local x, y = 1, 1
> for i=1,contents:len() do
> if contents[i] ~= ' ' then
> -- hacky version while we're without bitwise operators on Lua 5.1
>-- check(window.scr[y][x].attrs & curses.A_REVERSE, message..'/'..y..','..x)
> check_eq(window.scr[y][x].attrs, curses.A_REVERSE, message..'/'..y..','..x)
> else
> -- hacky version while we're without bitwise operators on Lua 5.1
>-- check(window.scr[y][x].attrs & (~curses.A_REVERSE), message..'/'..y..','..x)
> check(window.scr[y][x].attrs ~= curses.A_REVERSE, message..'/'..y..','..x)
> end
> x = x+1
> if x > window.scr.w then
> y = y+1
> x = 1
> end
> end
>end
- __teliva_timestamp: original
check_bold:
>function check_bold(window, contents, message)
> local x, y = 1, 1
> for i=1,contents:len() do
> if contents[i] ~= ' ' then
> -- hacky version while we're without bitwise operators on Lua 5.1
>-- check(window.scr[y][x].attrs & curses.A_BOLD, message..'/'..y..','..x)
> check_eq(window.scr[y][x].attrs, curses.A_BOLD, message..'/'..y..','..x)
> else
> -- hacky version while we're without bitwise operators on Lua 5.1
>-- check(window.scr[y][x].attrs & (~curses.A_BOLD), message..'/'..y..','..x)
> check(window.scr[y][x].attrs ~= curses.A_BOLD, message..'/'..y..','..x)
> end
> x = x+1
> if x > window.scr.w then
> y = y+1
> x = 1
> end
> end
>end
- __teliva_timestamp: original
check_color:
>-- check which parts of a screen have the given color_pair
>function check_color(window, cp, contents, message)
> local x, y = 1, 1
> for i=1,contents:len() do
> if contents[i] ~= ' ' then
> -- hacky version while we're without bitwise operators on Lua 5.1
>-- check(window.scr[y][x].attrs & curses.color_pair(cp), message..'/'..y..','..x)
> check_eq(window.scr[y][x].attrs, curses.color_pair(cp), message..'/'..y..','..x)
> else
> -- hacky version while we're without bitwise operators on Lua 5.1
>-- check(window.scr[y][x].attrs & (~curses.A_BOLD), message..'/'..y..','..x)
> check(window.scr[y][x].attrs ~= curses.color_pair(cp), message..'/'..y..','..x)
> end
> x = x+1
> if x > window.scr.w then
> y = y+1
> x = 1
> end
> end
>end
- __teliva_timestamp: original
render:
>function render(window)
> window:clear()
> -- draw stuff to screen here
> window:attron(curses.A_BOLD)
> window:mvaddstr(1, 5, "example app")
> window:attrset(curses.A_NORMAL)
> for i=0,15 do
> window:attrset(curses.color_pair(i))
> window:mvaddstr(3+i, 5, "========================")
> end
> window:refresh()
>end
- __teliva_timestamp: original
update:
>function update(window)
> local key = window:getch()
> -- process key here
>end
- __teliva_timestamp: original
doc:blurb:
>A REPL for queries about a graph in a .dot file.
- __teliva_timestamp: original
main:
>function main()
> if #arg == 0 then
> Window:clear()
> print('restart this app with the name of a .dot file')
> Window:refresh()
> while true do Window:getch(); end
> end
> Graph = read_dot_file(arg[1])
>
> while true do
> render(Window)
> update(Window)
> end
>end
- __teliva_timestamp: original
Graph:
>Graph = {}
- __teliva_timestamp: original
read_dot_file:
>function read_dot_file(filename)
> local graph = {}
> local infile = start_reading(nil, filename)
> if infile then
> local chars = graphviz_buffered_reader(infile)
> local tokens = graphviz_tokenizer(chars)
> parse_graph(tokens, graph)
> end
> return graph
>end
- __teliva_timestamp: original
graphviz_buffered_reader:
>-- a stream of characters that can peek up to two characters ahead at a time
>-- returns nil when there's nothing left to read
>function graphviz_buffered_reader(infile)
> return {
> infile = infile,
> peek = infile.read(1),
> peek2 = infile.read(1),
> read = function(self)
> local result = self.peek
> self.peek = self.peek2
> self.peek2 = self.infile.read(1)
> return result
> end,
> }
>end
- __teliva_timestamp: original
graphviz_tokenizer:
>-- a stream of tokens that can peek up to one token at a time
>-- returns nil when there's nothing left to read
>function graphviz_tokenizer(chars)
> return {
> chars = chars,
> peek = function(self)
> if not self.buffer then
> self.buffer = self:next_token()
> end
> return self.buffer
> end,
> read = function(self)
> local result
> if self.buffer then
> result = self.buffer
> self.buffer = nil
> else
> result = self:next_token()
> end
> return result
> end,
> next_token = function(self)
> self:skip_whitespace_and_comments()
> local c = self.chars.peek
> if c == nil then return nil end
> if string.pos('/*;,', c) then
> -- should be skipped as comments
> error('unexpected character '..c)
> elseif string.pos('[]{}():=', c) then
> -- single-char tokens
> return self.chars:read()
> elseif c == '"' then
> return self:string()
> elseif c == '<' then
> error('html strings are not implemented yet')
> elseif string.pos('-.0123456789', c) then
> return self:numeral()
> elseif string.match(c, '[%a_]') then
> return self:identifier()
> end
> end,
> skip_whitespace_and_comments = function(self)
> while true do
> local c = self.chars.peek
> if c == nil then
> break -- end of chars
> elseif string.match(c, '%s') then
> self.chars:read()
> elseif string.pos(',;', c) then
> self.chars:read()
> elseif c == '#' then
> self.chars:read() -- skip
> while self.chars:read() ~= '\n' do end
> elseif c == '/' then
> local c2 = self.chars.peek2
> if c2 == '*' then
> self.chars:read() -- skip '/'
> self.chars:read() -- skip '*'
> while true do
> if self.chars.peek == '*' and self.chars.peek2 == '/' then
> self.chars:read() -- skip '*'
> self.chars:read() -- skip '/'
> break
> end
> end
> elseif c2 == '/' then
> self.chars:read() -- skip '/'
> self.chars:read() -- skip '/'
> while self.chars:read() ~= '\n' do end
> else
> error('unexpected character after "/": '..c)
> end
> else
> break
> end
> end
> end,
> string = function(self)
> assert(self.chars.peek == '"')
> local result = self.chars:read()
> while true do
> local c = self.chars.peek
> if c == nil then
> error('unterminated string literal')
> end
> result = result..self.chars:read()
> if c == '\\' then
> result = result..self.chars:read() -- unconditionally read next char
> elseif c == '"' then
> break
> end
> end
> return result
> end,
> numeral = function(self)
> local result = ''
> while true do
> local c = self.chars.peek
> if c == nil then
> return result
> elseif string.pos('-.0123456789', c) then
> result = result..self.chars:read()
> else
> break
> end
> end
> if string.match(self.chars.peek, '%w') then
> error('invalid character after numeral '..result)
> end
> return result
> end,
> identifier = function(self)
> local result = ''
> while true do
> local c = self.chars.peek
> if c == nil then
> error('unterminated string literal')
> elseif string.match(c, '[%w_]') then
> result = result..self.chars:read()
> else
> break
> end
> end
> return result
> end,
> }
>end
>
>function check_tokenizer(stream, expected, msg)
> local infile = fake_file_stream(stream)
> local chars = graphviz_buffered_reader(infile)
> local tokens = graphviz_tokenizer(chars)
> check_eq(tokens:read(), expected, msg)
>end
>
>function test_graphviz_tokenizer()
> check_tokenizer('123', '123', 'tokenizer: numeral')
> check_tokenizer(' 123', '123', 'tokenizer: skips whitespace')
> check_tokenizer('123 124', '123', 'tokenizer: numeral')
> check_tokenizer('-12.3 124', '-12.3', 'tokenizer: numeral')
> check_tokenizer('a123 124', 'a123', 'tokenizer: identifier')
> check_tokenizer('"abc def" 124', '"abc def"', 'tokenizer: string')
> check_tokenizer('', nil, 'tokenizer: eof')
>end