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400b7842a9
When using the tmux passthrough sequence any escape characters in the inner sequence must be escaped by adding another escape character.
63 lines
1.9 KiB
Lua
63 lines
1.9 KiB
Lua
local M = {}
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--- Query the host terminal emulator for terminfo capabilities.
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---
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--- This function sends the XTGETTCAP DCS sequence to the host terminal emulator asking the terminal
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--- to send us its terminal capabilities. These are strings that are normally taken from a terminfo
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--- file, however an up to date terminfo database is not always available (particularly on remote
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--- machines), and many terminals continue to misidentify themselves or do not provide their own
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--- terminfo file, making the terminfo database unreliable.
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---
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--- Querying the terminal guarantees that we get a truthful answer, but only if the host terminal
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--- emulator supports the XTGETTCAP sequence.
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---
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--- @param caps string|table A terminal capability or list of capabilities to query
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--- @param cb function(cap:string, seq:string) Function to call when a response is received
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function M.query(caps, cb)
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vim.validate({
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caps = { caps, { 'string', 'table' } },
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cb = { cb, 'f' },
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})
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if type(caps) ~= 'table' then
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caps = { caps }
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end
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local count = #caps
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vim.api.nvim_create_autocmd('TermResponse', {
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callback = function(args)
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local resp = args.data ---@type string
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local k, v = resp:match('^\027P1%+r(%x+)=(%x+)$')
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if k and v then
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local cap = vim.text.hexdecode(k)
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local seq =
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vim.text.hexdecode(v):gsub('\\E', '\027'):gsub('%%p%d', ''):gsub('\\(%d+)', string.char)
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cb(cap, seq)
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count = count - 1
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if count == 0 then
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return true
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end
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end
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end,
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})
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local encoded = {} ---@type string[]
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for i = 1, #caps do
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encoded[i] = vim.text.hexencode(caps[i])
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end
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local query = string.format('\027P+q%s\027\\', table.concat(encoded, ';'))
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-- If running in tmux, wrap with the passthrough sequence
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if os.getenv('TMUX') then
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query = string.format('\027Ptmux;%s\027\\', query:gsub('\027', '\027\027'))
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end
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io.stdout:write(query)
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end
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return M
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