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feat(defaults): enable 'termguicolors' by default when supported by terminal

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Enable 'termguicolors' automatically when Nvim can detect that truecolor
is supported by the host terminal.

If $COLORTERM is set to "truecolor" or "24bit", or the terminal's
terminfo entry contains capabilities for Tc, RGB, or setrgbf and
setrgbb, then we assume that the terminal supports truecolor. Otherwise,
the terminal is queried (using both XTGETTCAP and SGR + DECRQSS). If the
terminal's response to these queries (if any) indicates that it supports
truecolor, then 'termguicolors' is enabled.
This commit is contained in:
Gregory Anders
2023-12-05 10:01:32 -08:00
parent 5b40a1c09d
commit 2613ba5000
11 changed files with 298 additions and 95 deletions
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52
runtime/lua/vim/termcap.lua
View File

@@ -12,7 +12,10 @@ local M = {}
--- emulator supports the XTGETTCAP sequence.
---
--- @param caps string|table A terminal capability or list of capabilities to query
--- @param cb function(cap:string, seq:string) Function to call when a response is received
--- @param cb function(cap:string, found:bool, 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' } },
@@ -23,21 +26,33 @@ function M.query(caps, cb)
caps = { caps }
end
local count = #caps
local pending = {} ---@type table<string, boolean>
for _, v in ipairs(caps) do
pending[v] = true
end
vim.api.nvim_create_autocmd('TermResponse', {
local timer = assert(vim.uv.new_timer())
local id = vim.api.nvim_create_autocmd('TermResponse', {
callback = function(args)
local resp = args.data ---@type string
local k, v = resp:match('^\027P1%+r(%x+)=(%x+)$')
if k and v then
local k, rest = resp:match('^\027P1%+r(%x+)(.*)$')
if k and rest then
local cap = vim.text.hexdecode(k)
local seq =
vim.text.hexdecode(v):gsub('\\E', '\027'):gsub('%%p%d', ''):gsub('\\(%d+)', string.char)
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, seq)
cb(cap, true, seq)
count = count - 1
if count == 0 then
pending[cap] = nil
if next(pending) == nil then
return true
end
end
@@ -57,6 +72,23 @@ function M.query(caps, cb)
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