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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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runtime/doc/vim_diff.txt
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@@ -75,6 +75,8 @@ Defaults *nvim-defaults*
- 'switchbuf' defaults to "uselast"
- 'tabpagemax' defaults to 50
- 'tags' defaults to "./tags;,tags"
- 'termguicolors' is enabled by default if Nvim can detect support from the
host terminal
- 'ttimeoutlen' defaults to 50
- 'ttyfast' is always set
- 'undodir' defaults to ~/.local/state/nvim/undo// (|xdg|), auto-created