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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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8
runtime/plugin/osc52.lua
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@@ -6,7 +6,11 @@ if not tty or vim.g.clipboard ~= nil or vim.o.clipboard ~= '' or not os.getenv('
return
end
require('vim.termcap').query('Ms', function(cap, seq)
require('vim.termcap').query('Ms', function(cap, found, seq)
if not found then
return
end
assert(cap == 'Ms')
-- Check 'clipboard' and g:clipboard again to avoid a race condition
@@ -16,7 +20,7 @@ require('vim.termcap').query('Ms', function(cap, seq)
-- If the terminal reports a sequence other than OSC 52 for the Ms capability
-- then ignore it. We only support OSC 52 (for now)
if not seq:match('^\027%]52') then
if not seq or not seq:match('^\027%]52') then
return
end