# .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 string.sub(str,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 string.sub(str,i,j)
    >  else
    >    local t={}
    >    for k,v in ipairs(i) do
    >      t[k]=string.sub(str,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
    >
    >-- 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_eq:
    >function check_eq(x, expected, msg)
    >  if x == expected then
    >    curses.addch('.')
    >  else
    >    print('F - '..msg)
    >    print('  expected '..tostring(expected)..' but got '..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
  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
  append:
    >function append(target, src)
    >  for _, line in ipairs(src) do
    >    table.insert(target, line)
    >  end
    >end
- __teliva_timestamp: original
  clear:
    >function clear(lines)
    >  while #lines > 0 do
    >    table.remove(lines)
    >  end
    >end
- __teliva_timestamp: original
  zap:
    >function zap(target, src)
    >  clear(target)
    >  append(target, src)
    >end
- __teliva_timestamp: original
  window:
    >window = curses.stdscr()
- __teliva_timestamp: original
  render_line:
    >function render_line(window, y, line)
    >  window:mvaddstr(y, 0, '')
    >  for i=1,string.len(line) do
    >    window:addstr(line[i])
    >  end
    >end
- __teliva_timestamp: original
  render_link:
    >function render_link(window, y, line)
    >  local rendered_line = string.gsub(line, '=>%s*%S*%s*', '')
    >  if trim(rendered_line) == '' then
    >    rendered_line = line
    >  end
    >  render_line(window, y, rendered_line)
    >end
- __teliva_timestamp: original
  state:
    >state = {
    >  lines={},
    >  history={},
    >  highlight_index=0,
    >  source=false,  -- show source (link urls, etc.)
    >}
- __teliva_timestamp: original
  render_page:
    >function render_page(window)
    >  local y = 0
    >  window:attron(curses.color_pair(6))
    >  print(state.url)
    >  window:attroff(curses.color_pair(6))
    >  y = y+2
    >--?   dbg(window, state.highlight_index)
    >  for i, line in pairs(state.lines) do
    >    if not state.source and string.find(line, '=> ') == 1 then
    >      if state.highlight_index == 0 or i == state.highlight_index then
    >        -- highlighted link
    >        state.highlight_index = i  -- TODO: ugly state update while rendering, just for first render after gemini_get
    >        curses.attron(curses.A_REVERSE)
    >        render_link(window, y, line)
    >        curses.attroff(curses.A_REVERSE)
    >      else
    >        -- link
    >        curses.attron(curses.A_BOLD)
    >        render_link(window, y, line)
    >        curses.attroff(curses.A_BOLD)
    >      end
    >    else
    >      -- non-link
    >      render_line(window, y, line)
    >    end
    >    y = y+1
    >  end
    >end
- __teliva_timestamp: original
  render:
    >function render(window, lines)
    >  window:clear()
    >  render_page(window, lines)
    >  curses.curs_set(0)
    >  window:refresh()
    >end
- __teliva_timestamp: original
  menu:
    >menu = {
    >  {'Enter', 'go to highlight'},
    >  {'<-', 'back'},
    >  {'^g', 'enter url'},
    >  {'^u', 'view source'},
    >}
- __teliva_timestamp: original
  edit_line:
    >function edit_line(window)
    >  local result = ''
    >  local cursor = 1
    >  local screen_rows, screen_cols = window:getmaxyx()
    >  menu = {
    >    {'enter', 'submit'},
    >    {'ctrl-g', 'cancel'},
    >    {'ctrl-u', 'clear'},
    >  }
    >  while true do
    >    window:mvaddstr(screen_rows-1, 9, '')
    >    window:clrtoeol()
    >    window:mvaddstr(screen_rows-1, 9, result)
    >    window:attron(curses.A_REVERSE)
    >    -- window:refresh()
    >    local key = curses.getch()
    >    window:attrset(curses.A_NORMAL)
    >    if key >= 32 and key < 127 then
    >      local screen_rows, screen_cols = window:getmaxyx()
    >      if #result < screen_cols then
    >        result = result:insert(string.char(key), cursor-1)
    >        cursor = cursor+1
    >      end
    >    elseif key == curses.KEY_LEFT then
    >      if cursor > 1 then
    >        cursor = cursor-1
    >      end
    >    elseif key == curses.KEY_RIGHT then
    >      if cursor <= #result then
    >        cursor = cursor+1
    >      end
    >    elseif key == curses.KEY_BACKSPACE then
    >      if cursor > 1 then
    >        cursor = cursor-1
    >        result = result:remove(cursor)
    >      end
    >    elseif key == 21 then  -- ctrl-u
    >      result = ''
    >      cursor = 1
    >    elseif key == 10 then  -- enter
    >      return result
    >    elseif key == 7 then  -- ctrl-g
    >      return nil
    >    end
    >  end
    >end
- __teliva_timestamp: original
  is_link:
    >function is_link(line)
    >  return string.find(line, '=>%s*%S*%s*') == 1
    >end
- __teliva_timestamp: original
  next_link:
    >function next_link()
    >  local new_index = state.highlight_index
    >  while true do
    >    new_index = new_index+1
    >    if new_index > #state.lines then return end
    >    if is_link(state.lines[new_index]) then break end
    >  end
    >  state.highlight_index = new_index
    >end
- __teliva_timestamp: original
  previous_link:
    >function previous_link()
    >  local new_index = state.highlight_index
    >  while true do
    >    new_index = new_index - 1
    >    if new_index < 1 then return end
    >    if is_link(state.lines[new_index]) then break end
    >  end
    >  state.highlight_index = new_index
    >end
- __teliva_timestamp: original
  update:
    >function update(window)
    >  local key = curses.getch()
    >  local screen_rows, screen_cols = window:getmaxyx()
    >  if key == curses.KEY_DOWN then
    >    next_link()
    >  elseif key == curses.KEY_UP then
    >    previous_link()
    >  elseif key == curses.KEY_LEFT then
    >    if #state.history > 1 then
    >      table.remove(state.history)
    >      gemini_get(table.remove(state.history))
    >    end
    >  elseif key == 21 then  -- ctrl-u
    >    state.source = not state.source
    >  elseif key == 10 then  -- enter
    >    local s, e, new_url = string.find(state.lines[state.highlight_index], '=>%s*(%S*)')
    >    gemini_get(url.absolute(state.url, new_url))
    >  elseif key == 7 then  -- ctrl-g
    >    window:mvaddstr(screen_rows-2, 0, '')
    >    window:clrtoeol()
    >    window:mvaddstr(screen_rows-1, 0, '')
    >    window:clrtoeol()
    >    window:mvaddstr(screen_rows-1, 5, 'go: ')
    >    curses.curs_set(2)
    >    local old_menu = menu
    >    local new_url = edit_line(window)
    >    menu = old_menu
    >    if new_url then
    >      state.url = new_url
    >      gemini_get(new_url)
    >    end
    >    curses.curs_set(0)
    >  end
    >end
- __teliva_timestamp: original
  init_colors:
    >function init_colors()
    >  for i=0,7 do
    >    curses.init_pair(i, i, 8)
    >  end
    >  curses.init_pair(8, 7, 0)
    >  curses.init_pair(9, 7, 1)
    >  curses.init_pair(10, 7, 2)
    >  curses.init_pair(11, 7, 3)
    >  curses.init_pair(12, 7, 4)
    >  curses.init_pair(13, 7, 5)
    >  curses.init_pair(14, 7, 6)
    >  curses.init_pair(15, 8, 15)
    >end
- __teliva_timestamp: original
  main:
    >function main()
    >  init_colors()
    >  local lines = {}
    >  local url = ''
    >  if #arg > 0 then
    >    state.url = arg[1]
    >    lines = gemini_get(state.url)
    >  end
    >  while true do
    >    render(window, lines)
    >    update(window, lines)
    >  end
    >end
- __teliva_timestamp: original
  http_get:
    >function http_get(url)
    >  -- https://stackoverflow.com/questions/42445423/luasocket-serveraccept-timeout-tcp
    >  local parsed_url = socket.url.parse(url)
    >  local tcp = socket.tcp()
    >  tcp:connect(parsed_url.host, 80)
    >  tcp:send('GET / HTTP/1.1\r\n')
    >  -- http requires the Host header
    >  tcp:send(string.format('Host: %s\r\n', parsed_url.host))
    >  tcp:send('\r\n')
    >  -- tcp:receive('*a') doesn't seem to detect when a request is done
    >  -- so we have to manage the size of the expected response
    >  headers = {}
    >  while true do
    >    local s, status = tcp:receive()
    >    if s == nil then break end
    >    if s == '' then break end
    >    local header, value = string.match(s, '(.-): (.*)')
    >    if header<style>pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #ffffcc }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .ges { font-weight: bold; font-style: italic } /* Generic.EmphStrong */
.highlight .gr { color: #aa0000 } /* Generic.Error */
.highlight .gh { color: #333333 } /* Generic.Heading */
.highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #555555 } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #666666 } /* Generic.Subheading */
.highlight .gt { color: #aa0000 } /* Generic.Traceback */
.highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
.highlight .no { color: #003366; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #555555 } /* Name.Decorator */
.highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */
.highlight .nl { color: #336699; font-style: italic } /* Name.Label */
.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.