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patch 9.1.0030: Cannot use terminal alternate font

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Problem:  Cannot use terminal alternate fonts (PMunch)
Solution: Support terminal alternate fonts using
          CSI SGR 10-20 and t_CF code (PMunch)

Add support for alternate font highlighting

This adds support for alternate font highlighting using CSI SGR 10-20.
Few terminals currently support this, but with added tool support this
should improve over time. The change here is more or less taken from how
colors are configured and applied, but there might be some parts I
missed while implementing it. Changing fonts is done through the new
`:hi ctermfont` attribute which takes a number, 0 is the normal font, and
the numbers 1-9 select an "alternative" font. Which fonts are in use is
up to the terminal.

fixes: #13513
closes: #13537

Signed-off-by: PMunch <peterme@peterme.net>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
PMunch
2023-11-15 15:35:49 +01:00
committed by Christian Brabandt
parent eb3475df0d
commit a606f3ac03
13 changed files with 130 additions and 8 deletions
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3
runtime/doc/term.txt
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@ -1,4 +1,4 @@
*term.txt* For Vim version 9.1. Last change: 2023 Dec 09
*term.txt* For Vim version 9.1. Last change: 2024 Jan 15
VIM REFERENCE MANUAL by Bram Moolenaar
@ -448,6 +448,7 @@ Added by Vim (there are no standard codes for these):
t_AU set underline color (ANSI) *t_AU* *'t_AU'*
t_Ce undercurl and underline end *t_Ce* *'t_Ce'*
t_Cs undercurl (curly underline) mode *t_Cs* *'t_Cs'*
t_CF set alternate font (using index 0 - 10) *t_CF* *'t_CF'*
t_Us double underline mode *t_Us* *'t_Us'*
t_ds dotted underline mode *t_ds* *'t_ds'*
t_Ds dashed underline mode *t_Ds* *'t_Ds'*