example: better venn drawing via C-hjkl to insert custom ◄▲►▼ and ascii drawing idea (requires upstream support to make the arrow direction and +-corner work correctly).

[matu3ba]

Workaround to make graphics really tight. Motivational Python comment for an automaton:

  --   #      ┌─────────────────────────┐
  --   #      ▼  ▼──────────┐           │
  --   # inactive(1)───▼    │       maybe_active(0)
  --   #    ▲ ▼     error_detected(3)───▲
  --   #   active(2)─────▲

is much denser and does not waste 3 extra lines for the up and down corners.

Relevant lua config:

-- (◄,▼,▲,►) in utf16: (0x25C4,0x25BC,0x25B2,0x25BA)
local venn_hint = [[
 Arrow^^^^^^  Select region with <C-v>^^^^^^
 ^ ^ _K_ ^ ^  _f_: Surround with box ^ ^ ^ ^
 _H_ ^ ^ _L_  _<C-h>_: ◄, _<C-j>_: ▼
 ^ ^ _J_ ^ ^  _<C-k>_: ▲, _<C-l>_: ► _<C-c>_
]]

-- :setlocal ve=all
-- :setlocal ve=none
M.venn_hydra = Hydra {
  name = 'Draw Diagram',
  hint = venn_hint,
  config = {
    color = 'pink',
    invoke_on_body = true,
    hint = {
      border = 'rounded',
    },
    on_enter = function() vim.wo.virtualedit = 'all' end,
  },
  mode = 'n',
  body = '<leader>ve',
  heads = {
    { '<C-h>', 'xi<C-v>u25c4<Esc>' }, -- mode = 'v' somehow breaks
    { '<C-j>', 'xi<C-v>u25bc<Esc>' },
    { '<C-k>', 'xi<C-v>u25b2<Esc>' },
    { '<C-l>', 'xi<C-v>u25ba<Esc>' },
    { 'H', '<C-v>h:VBox<CR>' },
    { 'J', '<C-v>j:VBox<CR>' },
    { 'K', '<C-v>k:VBox<CR>' },
    { 'L', '<C-v>l:VBox<CR>' },
    { 'f', ':VBox<CR>', { mode = 'v' } },
    { '<C-c>', nil, { exit = true } },
  },
}

Drawing ascii eventually to be followed. My idea so far (not sure if feasible or working due to the bugs):

-- symbols (-,|,^,<,>,/,\)
local venn_hint_ascii   = [[
 - and | moves^^   Confirmation moves^^^^
 ^ ^ _K_ ^ ^ ^ ^   _<C-h>_: ◄, _<C-j>_: ▼
 _H_ ^ ^ _L_ ^ ^   ^     ^       ^   ^  ^
 ^ ^ _J_ ^ ^ ^ ^   _<C-k>_: ▲, _<C-l>_: ►
 ◄ + ▲ = \ ^ ^ ^   ◄ + ◄ / ► + ► = - / -
 ► + ▲ = / ^ ^ ^   ▲ + ▲ / ▼ + ▼ = | / |
 ◄ + ▼ = \ ^ ^ ^   other followup symbol
 ► + ▼ = / ^ ^ ^   + ◄▲► = <^> and ▼ = nop
 _F_: surround^^   _f_: surround     ^^ ^
 + corners ^  ^^   overwritten corners
                              _<C-c>_
]]