mirror of
https://github.com/neovim/neovim.git
synced 2025-11-03 17:24:29 +00:00
234b5f6701
Co-authored-by: Evgeni Chasnovski <evgeni.chasnovski@gmail.com> Co-authored-by: Famiu Haque <famiuhaque@proton.me> Co-authored-by: Gregory Anders <greg@gpanders.com> Co-authored-by: Guilherme Soares <guilhermesoares1970@gmail.com> Co-authored-by: Jannik Buhr <jannik.m.buhr@gmail.com> Co-authored-by: thomaswuhoileong <72001875+thomaswuhoileong@users.noreply.github.com> Co-authored-by: tom-anders <13141438+tom-anders@users.noreply.github.com> Co-authored-by: zeertzjq <zeertzjq@outlook.com>
102 lines
3.1 KiB
Lua
102 lines
3.1 KiB
Lua
local M = {}
|
|
|
|
--- Query the host terminal emulator for terminfo capabilities.
|
|
---
|
|
--- This function sends the XTGETTCAP DCS sequence to the host terminal emulator asking the terminal
|
|
--- to send us its terminal capabilities. These are strings that are normally taken from a terminfo
|
|
--- file, however an up to date terminfo database is not always available (particularly on remote
|
|
--- machines), and many terminals continue to misidentify themselves or do not provide their own
|
|
--- terminfo file, making the terminfo database unreliable.
|
|
---
|
|
--- Querying the terminal guarantees that we get a truthful answer, but only if the host terminal
|
|
--- emulator supports the XTGETTCAP sequence.
|
|
---
|
|
--- @param caps string|table A terminal capability or list of capabilities to query
|
|
--- @param cb fun(cap:string, found:boolean, seq:string?) Callback function which is called for
|
|
--- each capability in {caps}. {found} is set to true if the capability was found or false
|
|
--- otherwise. {seq} is the control sequence for the capability if found, or nil for
|
|
--- boolean capabilities.
|
|
function M.query(caps, cb)
|
|
vim.validate({
|
|
caps = { caps, { 'string', 'table' } },
|
|
cb = { cb, 'f' },
|
|
})
|
|
|
|
if type(caps) ~= 'table' then
|
|
caps = { caps }
|
|
end
|
|
|
|
local pending = {} ---@type table<string, boolean>
|
|
for _, v in ipairs(caps) do
|
|
pending[v] = true
|
|
end
|
|
|
|
local timer = assert(vim.uv.new_timer())
|
|
|
|
local id = vim.api.nvim_create_autocmd('TermResponse', {
|
|
nested = true,
|
|
callback = function(args)
|
|
local resp = args.data ---@type string
|
|
local k, rest = resp:match('^\027P1%+r(%x+)(.*)$')
|
|
if k and rest then
|
|
local cap = vim.text.hexdecode(k)
|
|
if not pending[cap] then
|
|
-- Received a response for a capability we didn't request. This can happen if there are
|
|
-- multiple concurrent XTGETTCAP requests
|
|
return
|
|
end
|
|
|
|
local seq ---@type string?
|
|
if rest:match('^=%x+$') then
|
|
seq = vim.text
|
|
.hexdecode(rest:sub(2))
|
|
:gsub('\\E', '\027')
|
|
:gsub('%%p%d', '')
|
|
:gsub('\\(%d+)', string.char)
|
|
end
|
|
|
|
cb(cap, true, seq)
|
|
|
|
pending[cap] = nil
|
|
|
|
if next(pending) == nil then
|
|
return true
|
|
end
|
|
end
|
|
end,
|
|
})
|
|
|
|
local encoded = {} ---@type string[]
|
|
for i = 1, #caps do
|
|
encoded[i] = vim.text.hexencode(caps[i])
|
|
end
|
|
|
|
local query = string.format('\027P+q%s\027\\', table.concat(encoded, ';'))
|
|
|
|
-- If running in tmux, wrap with the passthrough sequence
|
|
if os.getenv('TMUX') then
|
|
query = string.format('\027Ptmux;%s\027\\', query:gsub('\027', '\027\027'))
|
|
end
|
|
|
|
io.stdout:write(query)
|
|
|
|
timer:start(1000, 0, function()
|
|
-- Delete the autocommand if no response was received
|
|
vim.schedule(function()
|
|
-- Suppress error if autocommand has already been deleted
|
|
pcall(vim.api.nvim_del_autocmd, id)
|
|
|
|
-- Call the callback for all capabilities that were not found
|
|
for k in pairs(pending) do
|
|
cb(k, false, nil)
|
|
end
|
|
end)
|
|
|
|
if not timer:is_closing() then
|
|
timer:close()
|
|
end
|
|
end)
|
|
end
|
|
|
|
return M
|