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|
local vim = assert(vim)
local M = {}
local cons = "tnshrdlcumwfgypkbvjxqz" -- 21
local vowel = "aeiou" -- 5
local hsel1 = "tnshrdlcumwfgypkbvjxqz" -- 21
local hsel2 = "aeiou" -- 5
local function char_at(s, i)
local m = (i % #s) + 1
return string.sub(s, m, m)
end
local function new_panel(buf, row, col, width, height)
local w = vim.api.nvim_open_win(buf, false, {
relative = 'win',
row = row,
col = col,
width = width,
height = height,
focusable = false,
style = 'minimal'
})
vim.api.nvim_win_set_option(w, "winhighlight", "Normal:WarpNormal")
return w
end
M.open_vertical = function()
local current_win = vim.api.nvim_get_current_win()
local height = vim.api.nvim_win_get_height(current_win)
local topline = vim.fn.line('w0')
local width_of_garbage = vim.fn.getwininfo(current_win)[1].textoff
M.row_map = {}
M.vert_buf = vim.api.nvim_create_buf(0, 1)
local line = 0
M.vert_lines = {}
local real_width = math.max(3, width_of_garbage)
while line < height do
local t = char_at(cons, line) .. char_at(vowel, line)
table.insert(M.vert_lines, (' '):rep(real_width - 3) .. t .. ' ')
M.row_map[t] = topline + line
line = line + 1
end
vim.api.nvim_buf_set_lines(M.vert_buf, 0, -1, 0, M.vert_lines)
return new_panel(M.vert_buf, 0, 0, real_width, height);
end
M.open_horiz = function()
local current_win = vim.api.nvim_get_current_win()
local curpos = vim.api.nvim_win_get_cursor(0)
local topline = vim.fn.line('w0')
local width_of_garbage = vim.fn.getwininfo(current_win)[1].textoff
local width = vim.api.nvim_win_get_width(current_win) - width_of_garbage
M.horiz_bufnr = vim.api.nvim_create_buf(0, 1)
local col = 0
local line = ''
local v = ''
local c = nil
local i = 0
local line_at = vim.fn.getline(curpos[1])
M.col_map = {}
local max_width = math.min(width, #line_at + 1)
while col < max_width do
v = char_at(hsel1, i)
if c then
if M.col_map[v .. c] then break end
M.col_map[c .. v] = col - 1
end
c = char_at(hsel2, i)
if M.col_map[c .. v] then break end
line = line .. v
col = col + 1
if col < max_width then
line = line .. c
M.col_map[v .. c] = col - 1
col = col + 1
i = i + 1
end
end
vim.api.nvim_buf_set_lines(M.horiz_bufnr, 0, -1, 0, {' ' .. line})
M.horiz_line = line
return new_panel(M.horiz_bufnr, curpos[1] - topline + 1, width_of_garbage - 1,
max_width + 2, 1)
end
M.filter_horiz_string = function(ch)
local new_horiz_line = ''
local i = 1
while i <= #M.horiz_line do
local curch = char_at(M.horiz_line, i - 1)
if curch == ch then
new_horiz_line = new_horiz_line .. char_at(M.horiz_line, i)
else
new_horiz_line = new_horiz_line .. ' '
end
i = i + 1
end
vim.api.nvim_buf_set_lines(M.horiz_bufnr, 0, -1, 0, {' ' .. new_horiz_line})
end
M.filter_vert_text = function(ch)
local new_vert_text = {}
for _, t in pairs(M.vert_lines) do
local str = t:gsub("^%s*" .. ch, function(m) return (' '):rep(#m) end)
if t:match('^%s*' .. ch) then
table.insert(new_vert_text, str)
else
table.insert(new_vert_text, "")
end
end
M.vert_lines = new_vert_text
vim.api.nvim_buf_set_lines(M.vert_buf, 0, -1, 0, M.vert_lines)
end
local function next_char()
vim.cmd("redraw!")
return vim.fn.nr2char(vim.fn.getchar())
end
M.run = function()
local current_pos = vim.api.nvim_win_get_cursor(0)
local old_scroll = vim.o.scrolloff
vim.o.scrolloff = 0
(function()
local w
local cleanup = function(win)
vim.api.nvim_buf_delete(vim.api.nvim_win_get_buf(win), {force = true})
end
local read_row = function()
w = M.open_vertical()
local vch1 = next_char()
if vch1 == '\x1b' then
return
elseif vch1 == '.' then
return current_pos[1]
else
M.filter_vert_text(vch1)
local vch2 = next_char()
if vch1 == '\x1b' then return end
return M.row_map[vch1 .. vch2]
end
end
local r = read_row()
if w then
cleanup(w)
w = nil
end
if not r then return end
vim.api.nvim_win_set_cursor(0, {r, current_pos[2]})
local read_col = function()
w = M.open_horiz()
local hch1 = next_char()
if hch1 == '\x1b' then
return nil
elseif hch1 == '.' then
return current_pos[2]
elseif not hch1:match('[a-z]') then
return hch1
else
M.filter_horiz_string(hch1)
local hch2 = next_char()
if hch2 == '\x1b' then return end
return M.col_map[hch1 .. hch2]
end
end
local c = read_col()
if w then cleanup(w) end
if not c then return end
if c == '$' or c == '^' then
vim.cmd("normal! " .. c)
elseif type(c) == 'string' then
vim.cmd("normal! f" .. c)
else
vim.cmd("normal! " .. (c + 1) .. "|") -- handle multibyte characters
end
end)()
vim.o.scrolloff = old_scroll
end
return M
|
