696 lines
23 KiB
Lua
696 lines
23 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 string.sub(str,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 string.sub(str,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]=string.sub(str,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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>-- 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_eq:
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>function check_eq(x, expected, msg)
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> if x == expected then
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> curses.addch('.')
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> else
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> print('F - '..msg)
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> print(' expected '..tostring(expected)..' but got '..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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map:
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>-- only for arrays
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>function map(l, f)
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> result = {}
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> for _, x in ipairs(l) do
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> table.insert(result, f(x))
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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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reduce:
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>-- only for arrays
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>function reduce(l, f, init)
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> result = init
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> for _, x in ipairs(l) do
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> result = f(result, x)
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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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filter:
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>-- only for arrays
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>function filter(l, f)
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> result = {}
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> for _, x in ipairs(l) do
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> if f(x) then
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> table.insert(result, x)
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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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find_index:
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>function find_index(arr, x)
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> for n, y in ipairs(arr) do
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> if x == y then
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> return n
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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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trim:
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>function trim(s)
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> return s:gsub('^%s*', ''):gsub('%s*$', '')
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>end
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- __teliva_timestamp: original
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split:
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>function split(s, d)
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> result = {}
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> for match in (s..d):gmatch("(.-)"..d) do
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> table.insert(result, match);
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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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spaces:
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>function spaces(n)
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> for i=1,n do
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> curses.addch(' ')
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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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- __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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> {'^e', 'edit'},
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>}
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- __teliva_timestamp: original
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init_colors:
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>function init_colors()
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> -- light background
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> curses.init_pair(view_settings.current_zettel_bg, 236, 230)
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> curses.init_pair(1, 236, 250)
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> curses.init_pair(2, 236, 252)
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> -- dark background
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>--? curses.init_pair(view_settings.current_zettel_bg, 252, 130)
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>--? curses.init_pair(1, 252, 240)
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>--? curses.init_pair(2, 252, 242)
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>end
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- __teliva_timestamp: original
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main:
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>function main()
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> init_colors()
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> current_zettel_id = zettels.root
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>
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> while true do
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> render(window)
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> update(window)
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> end
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>end
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- __teliva_timestamp: original
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depth:
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>function depth(zettel)
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> local result = 0
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> while zettel.parent do
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> result = result+1
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> zettel = zettel.parent
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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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render_zettel:
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>function render_zettel(window, bg, indent, starty, startx, zettel)
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> window:attrset(curses.color_pair(bg))
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> for y=0,view_settings.height-1 do
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> for x=0,view_settings.width-1 do
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> window:mvaddch(y+starty, x+startx, ' ')
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> end
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> end
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> local y, x = 0, indent+1
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> for i=1,#zettel.data do
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> local c = zettel.data[i]
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> if c == '\n' then
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> y = y+1
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> x = indent+1
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> else
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> window:mvaddstr(y+starty, x+startx, c)
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> x = x+1
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> if x >= startx + view_settings.width then
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> y = y+1
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> x = indent+1
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> end
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> end
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> if y >= view_settings.height then
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> break
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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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current_zettel_id:
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>current_zettel_id = ''
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- __teliva_timestamp: original
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view_settings:
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>view_settings = {
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> -- dimensions for rendering a single zettel; extra text gets truncated
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> width=50,
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> height=3,
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> -- spacing between zettels
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> hmargin=1,
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> vmargin=1,
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> --
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> indent=2, -- how children of a zettel are indicated
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> current_zettel_bg=3, -- color pair index initialized in init_colors
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>}
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- __teliva_timestamp: original
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zettels:
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>zettels = {
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> root="a",
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> a={
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> data="abc\ndef",
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> child="c",
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> next="b",
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> },
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> b={
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> data="ghi\njklm",
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> prev="a",
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> },
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> c={
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> data="c",
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> parent="a",
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> next="d",
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> },
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> d={
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> data="d",
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> parent="a",
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> prev="c",
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> }
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>}
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- __teliva_timestamp: original
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render_state:
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>-- some information about what's been drawn on screen
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>render_state = {
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> -- where the current zettel is, in units of zettels
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> curr_h = 1,
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> curr_w = 1,
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> -- what zettel is at each position on screen, in units of zettels
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> hw2id = {},
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>}
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- __teliva_timestamp: original
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update:
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>function update(window)
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> local key = curses.getch()
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> local curr = zettels[current_zettel_id]
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> -- graph-based navigation
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> if key == string.byte('j') then
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> if curr.child then
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> current_zettel_id = curr.child
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> elseif curr.next then
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> current_zettel_id = curr.next
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> elseif curr.parent and zettels[curr.parent].next then
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> current_zettel_id = zettels[curr.parent].next
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> end
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> elseif key == string.byte('k') then
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> if curr.parent then current_zettel_id = curr.parent end
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> elseif key == string.byte('h') then
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> if curr.prev then
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> current_zettel_id = curr.prev
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> elseif curr.parent then
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> current_zettel_id = curr.parent
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> end
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> elseif key == string.byte('l') then
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> if curr.next then
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> current_zettel_id = curr.next
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> elseif curr.parent and zettels[curr.parent].next then
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> current_zettel_id = zettels[curr.parent].next
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> end
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> -- screen-based navigation
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> elseif key == curses.KEY_UP then
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> if render_state.curr_h > 1 then
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> current_zettel_id = render_state.wh2id[render_state.curr_w][render_state.curr_h - 1]
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> end
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> elseif key == curses.KEY_DOWN then
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> if render_state.wh2id[render_state.curr_w][render_state.curr_h + 1] then
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> current_zettel_id = render_state.wh2id[render_state.curr_w][render_state.curr_h + 1]
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> end
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> elseif key == curses.KEY_LEFT then
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> if render_state.curr_w > 1 then
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> current_zettel_id = render_state.wh2id[render_state.curr_w - 1][render_state.curr_h]
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> end
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> elseif key == curses.KEY_RIGHT then
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> if render_state.wh2id[render_state.curr_w + 1] and render_state.wh2id[render_state.curr_w + 1][render_state.curr_h] then
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> current_zettel_id = render_state.wh2id[render_state.curr_w + 1][render_state.curr_h]
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> end
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> --
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> elseif key == 5 then -- ctrl-e
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> local old_menu = menu
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> editz(window)
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> menu = old_menu
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> end
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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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> local lines, cols = window:getmaxyx()
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> local bg=1
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> local y, x = 0, 0 -- units of characters (0-based)
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> local w, h = 1, 1 -- units of zettels (1-based)
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> -- render zettels depth-first, while tracking relative positions
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> local done = {}
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> local inprogress = {zettels.root}
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> render_state.wh2id = {{}}
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> while #inprogress > 0 do
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> local currid = table.remove(inprogress)
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> if not done[currid] then
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> done[currid] = true
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> table.insert(render_state.wh2id[w], currid)
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> local zettel = zettels[currid]
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> if currid == current_zettel_id then
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> render_state.curr_w = w
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> render_state.curr_h = h
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> end
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> local currbg = (currid == current_zettel_id) and view_settings.current_zettel_bg or bg
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> render_zettel(window, currbg, depth(zettel) * view_settings.indent, y, x, zettel)
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> if zettel.next then table.insert(inprogress, zettel.next) end
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> if zettel.child then table.insert(inprogress, zettel.child) end
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> bg = 3 - bg -- toggle between color pairs 1 and 2
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> y = y + view_settings.height + view_settings.vmargin
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> h = h + 1
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> if y + view_settings.height > lines then
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> y = 0
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> h = 1
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> x = x + view_settings.width + view_settings.hmargin
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> w = w + 1
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> if x + view_settings.width > cols then break end
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> table.insert(render_state.wh2id, {})
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> end
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> end
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> end
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> window:mvaddstr(lines-2, 0, '')
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> for i=1,3 do
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> window:attrset(curses.color_pair(i%2+1))
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> window:addstr('')
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> spaces(view_settings.width-string.len(''))
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> window:attrset(curses.color_pair(0))
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> window:addstr(' ') -- margin
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> end
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> window:mvaddstr(lines-1, 0, '? ')
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> curses.refresh()
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>end
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- __teliva_timestamp: original
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view_settings:
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>view_settings = {
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> -- dimensions for rendering a single zettel; extra text gets truncated
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> width=50,
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> height=3,
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> -- spacing between zettels
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> hmargin=1,
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> vmargin=1,
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> --
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> indent=2, -- how children of a zettel are indicated
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> current_zettel_bg=3, -- color pair index initialized in init_colors
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>}
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- __teliva_timestamp: original
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editz:
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>function editz()
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> menu = { {'^e', 'back to browsing'},}
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> local top = (render_state.curr_h - 1) * (view_settings.height + view_settings.vmargin)
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> local bottom = top + view_settings.height
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> local left = (render_state.curr_w - 1) * (view_settings.width + view_settings.hmargin)
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> local right = left + view_settings.width
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> local cursor = 1
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> curses.curs_set(0)
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> local quit = false
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> while not quit do
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> editz_render(window, zettels[current_zettel_id].data, cursor, top, bottom, left, right)
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> quit, zettels[current_zettel_id].data, cursor = editz_update(window, zettels[current_zettel_id].data, cursor)
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> end
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> curses.curs_set(1)
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>end
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- __teliva_timestamp: original
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editz_render:
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>function editz_render(window, s, cursor, top, minbottom, left, right)
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> local h, w = window:getmaxyx()
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> window:attrset(curses.color_pair(view_settings.current_zettel_bg))
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> for y=top,minbottom-1 do
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> for x=left,right-1 do
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> window:mvaddch(y, x, ' ')
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> end
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> end
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> local y, x = top, left + 1 -- left padding; TODO: indent
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> window:mvaddstr(y, x, '')
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> for i=1,string.len(s) do
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> -- render character
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> if i == cursor then
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> if s[i] == '\n' then
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> -- newline at cursor = render extra space in reverse video before jumping to new line
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> window:attron(curses.A_REVERSE)
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> window:addch(' ')
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> window:attroff(curses.A_REVERSE)
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> else
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> -- most characters at cursor = render in reverse video
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> window:attron(curses.A_REVERSE)
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> window:addstr(s[i])
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> window:attroff(curses.A_REVERSE)
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> end
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> else
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> if s[i] ~= '\n' then
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> window:addstr(s[i])
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> end
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> end
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> -- update cursor position
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> if s[i] == '\n' then
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> if i == cursor then x = x + 1; end
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> for col=x,right-1 do window:addch(' '); end
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> x = left
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> y = y + 1
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> if y >= h-2 then return end
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> window:mvaddstr(y, x, '')
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> for col=x,right-1 do window:addch(' '); end
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> x = left + 1 -- left padding; TODO: indent
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> window:mvaddstr(y, x, '')
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> else
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> x = x + 1
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> if x >= right then
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> y = y + 1
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> if y >= h-2 then return end
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> x = left + 1 -- left padding; TODO: indent
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> window:mvaddstr(y, x, '')
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> end
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> end
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> end
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> if cursor > string.len(s) then
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> window:attron(curses.A_REVERSE)
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> window:addch(' ')
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> window:attroff(curses.A_REVERSE)
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> else
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> window:addch(' ')
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> end
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>end
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- __teliva_timestamp: original
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editz_update:
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>function editz_update(window, prose, cursor)
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> local key = curses.getch()
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> local h, w = window:getmaxyx()
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> if key == curses.KEY_LEFT then
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> if cursor > 1 then
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> cursor = cursor-1
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> end
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> elseif key == curses.KEY_RIGHT then
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> if cursor <= #prose then
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> cursor = cursor+1
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> end
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> elseif key == curses.KEY_DOWN then
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> cursor = cursor_down(prose, cursor, w)
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> elseif key == curses.KEY_UP then
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> cursor = cursor_up(prose, cursor, w)
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> elseif key == curses.KEY_BACKSPACE or key == 8 or key == 127 then -- ctrl-h, ctrl-?, delete
|
|
> if cursor > 1 then
|
|
> cursor = cursor-1
|
|
> prose = prose:remove(cursor)
|
|
> end
|
|
> elseif key == 5 then -- ctrl-e
|
|
> return true, prose, cursor
|
|
> elseif key == 10 or (key >= 32 and key < 127) then
|
|
> prose = prose:insert(string.char(key), cursor-1)
|
|
> cursor = cursor+1
|
|
> end
|
|
> return false, prose, cursor
|
|
>end
|
|
- __teliva_timestamp: original
|
|
cursor_down:
|
|
>function cursor_down(s, old_idx, width)
|
|
> local max = string.len(s)
|
|
> local i = 1
|
|
> -- compute oldcol, the screen column of old_idx
|
|
> local oldcol = 0
|
|
> local col = 0
|
|
> while true do
|
|
> if i > max then
|
|
> -- abnormal old_idx
|
|
> return old_idx
|
|
> end
|
|
> if i == old_idx then
|
|
> oldcol = col
|
|
> break
|
|
> end
|
|
> if s[i] == '\n' then
|
|
> col = 0
|
|
> else
|
|
> col = col+1
|
|
> end
|
|
> i = i+1
|
|
> end
|
|
> -- skip rest of line
|
|
> while true do
|
|
> if i > max then
|
|
> -- current line is at bottom
|
|
> if col >= width then
|
|
> return i
|
|
> end
|
|
> return old_idx
|
|
> end
|
|
> if s[i] == '\n' then
|
|
> break
|
|
> end
|
|
> if i - old_idx >= width then
|
|
> return i
|
|
> end
|
|
> col = col+1
|
|
> i = i+1
|
|
> end
|
|
> -- compute index at same column on next line
|
|
> -- i is at a newline
|
|
> i = i+1
|
|
> col = 0
|
|
> while true do
|
|
> if i > max then
|
|
> -- next line is at bottom and is too short; position at end of it
|
|
> return i
|
|
> end
|
|
> if s[i] == '\n' then
|
|
> -- next line is too short; position at end of it
|
|
> return i
|
|
> end
|
|
> if col == oldcol then
|
|
> return i
|
|
> end
|
|
> col = col+1
|
|
> i = i+1
|
|
> end
|
|
>end
|
|
>
|
|
>function test_cursor_down()
|
|
> -- lines that don't wrap
|
|
> check_eq(cursor_down('abc\ndef', 1, 5), 5, 'cursor_down: non-bottom line first char')
|
|
> check_eq(cursor_down('abc\ndef', 2, 5), 6, 'cursor_down: non-bottom line mid char')
|
|
> check_eq(cursor_down('abc\ndef', 3, 5), 7, 'cursor_down: non-bottom line final char')
|
|
> check_eq(cursor_down('abc\ndef', 4, 5), 8, 'cursor_down: non-bottom line end')
|
|
> check_eq(cursor_down('abc\ndef', 5, 5), 5, 'cursor_down: bottom line first char')
|
|
> check_eq(cursor_down('abc\ndef', 6, 5), 6, 'cursor_down: bottom line mid char')
|
|
> check_eq(cursor_down('abc\ndef', 7, 5), 7, 'cursor_down: bottom line final char')
|
|
> check_eq(cursor_down('abc\n\ndef', 2, 5), 5, 'cursor_down: to shorter line')
|
|
>
|
|
> -- within a single wrapping line
|
|
> -- |abcde| <-- wrap, no newline
|
|
> -- |fgh |
|
|
> check_eq(cursor_down('abcdefgh', 1, 5), 6, 'cursor_down from wrapping line: first char')
|
|
> check_eq(cursor_down('abcdefgh', 2, 5), 7, 'cursor_down from wrapping line: mid char')
|
|
> check_eq(cursor_down('abcdefgh', 5, 5), 9, 'cursor_down from wrapping line: to shorter line')
|
|
>
|
|
> -- within a single very long wrapping line
|
|
> -- |abcde| <-- wrap, no newline
|
|
> -- |fghij| <-- wrap, no newline
|
|
> -- |klm |
|
|
> check_eq(cursor_down('abcdefghijklm', 1, 5), 6, 'cursor_down within wrapping line: first char')
|
|
> check_eq(cursor_down('abcdefghijklm', 2, 5), 7, 'cursor_down within wrapping line: mid char')
|
|
> check_eq(cursor_down('abcdefghijklm', 5, 5), 10, 'cursor_down within wrapping line: final char')
|
|
>end
|
|
- __teliva_timestamp: original
|
|
cursor_up:
|
|
>function cursor_up(s, old_idx, width)
|
|
> local max = string.len(s)
|
|
> local i = 1
|
|
> -- compute oldcol, the screen column of old_idx
|
|
> local oldcol = 0
|
|
> local col = 0
|
|
> local newline_before_current_line = 0
|
|
> while true do
|
|
> if i > max or i == old_idx then
|
|
> oldcol = col
|
|
> break
|
|
> end
|
|
> if s[i] == '\n' then
|
|
> col = 0
|
|
> newline_before_current_line = i
|
|
> else
|
|
> col = col+1
|
|
> if col == width then
|
|
> col = 0
|
|
> end
|
|
> end
|
|
> i = i+1
|
|
> end
|
|
> -- find previous newline
|
|
> i = i-col-1
|
|
> if old_idx - newline_before_current_line > width then
|
|
> -- we're in a wrapped line
|
|
> return old_idx - width
|
|
> end
|
|
> -- scan back to start of previous line
|
|
> if s[i] == '\n' then
|
|
> i = i-1
|
|
> end
|
|
> while true do
|
|
> if i < 1 then
|
|
> -- current line is at top
|
|
> break
|
|
> end
|
|
> if s[i] == '\n' then
|
|
> break
|
|
> end
|
|
> i = i-1
|
|
> end
|
|
> -- i is at a newline
|
|
> i = i+1
|
|
> -- skip whole screen lines within previous line
|
|
> while newline_before_current_line - i > width do
|
|
> i = i + width
|
|
> end
|
|
> -- compute index at same column on previous screen line
|
|
> col = 0
|
|
> while true do
|
|
> if i > max then
|
|
> -- next line is at bottom and is too short; position at end of it
|
|
> return i
|
|
> end
|
|
> if s[i] == '\n' then
|
|
> -- next line is too short; position at end of it
|
|
> return i
|
|
> end
|
|
> if col == oldcol then
|
|
> return i
|
|
> end
|
|
> col = col+1
|
|
> i = i+1
|
|
> end
|
|
>end
|
|
>
|
|
>function test_cursor_up()
|
|
> -- lines that don't wrap
|
|
> check_eq(cursor_up('abc\ndef', 1, 5), 1, 'cursor_up: top line first char')
|
|
> check_eq(cursor_up('abc\ndef', 2, 5), 2, 'cursor_up: top line mid char')
|
|
> check_eq(cursor_up('abc\ndef', 3, 5), 3, 'cursor_up: top line final char')
|
|
> check_eq(cursor_up('abc\ndef', 4, 5), 4, 'cursor_up: top line end')
|
|
> check_eq(cursor_up('abc\ndef', 5, 5), 1, 'cursor_up: non-top line first char')
|
|
> check_eq(cursor_up('abc\ndef', 6, 5), 2, 'cursor_up: non-top line mid char')
|
|
> check_eq(cursor_up('abc\ndef', 7, 5), 3, 'cursor_up: non-top line final char')
|
|
> check_eq(cursor_up('abc\ndef\n', 8, 5), 4, 'cursor_up: non-top line end')
|
|
> check_eq(cursor_up('ab\ndef\n', 7, 5), 3, 'cursor_up: to shorter line')
|
|
>
|
|
> -- within a single wrapping line
|
|
> -- |abcde| <-- wrap, no newline
|
|
> -- |fgh |
|
|
> check_eq(cursor_up('abcdefgh', 6, 5), 1, 'cursor_up from wrapping line: first char')
|
|
> check_eq(cursor_up('abcdefgh', 7, 5), 2, 'cursor_up from wrapping line: mid char')
|
|
> check_eq(cursor_up('abcdefgh', 8, 5), 3, 'cursor_up from wrapping line: final char')
|
|
> check_eq(cursor_up('abcdefgh', 9, 5), 4, 'cursor_up from wrapping line: wrapped line end')
|
|
>
|
|
> -- within a single very long wrapping line
|
|
> -- |abcde| <-- wrap, no newline
|
|
> -- |fghij| <-- wrap, no newline
|
|
> -- |klm |
|
|
> check_eq(cursor_up('abcdefghijklm', 11, 5), 6, 'cursor_up within wrapping line: first char')
|
|
> check_eq(cursor_up('abcdefghijklm', 12, 5), 7, 'cursor_up within wrapping line: mid char')
|
|
> check_eq(cursor_up('abcdefghijklm', 13, 5), 8, 'cursor_up within wrapping line: final char')
|
|
> check_eq(cursor_up('abcdefghijklm', 14, 5), 9, 'cursor_up within wrapping line: wrapped line end')
|
|
>
|
|
> -- from below to (the bottom of) a wrapping line
|
|
> -- |abcde| <-- wrap, no newline
|
|
> -- |fg |
|
|
> -- |hij |
|
|
> check_eq(cursor_up('abcdefg\nhij', 9, 5), 6, 'cursor_up to wrapping line: first char')
|
|
> check_eq(cursor_up('abcdefg\nhij', 10, 5), 7, 'cursor_up to wrapping line: mid char')
|
|
> check_eq(cursor_up('abcdefg\nhij', 11, 5), 8, 'cursor_up to wrapping line: final char')
|
|
> check_eq(cursor_up('abcdefg\nhij', 12, 5), 8, 'cursor_up to wrapping line: to shorter line')
|
|
>end
|