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patch 9.0.0007: no support for double, dotted and dashed underlines

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Problem:    No support for double, dotted and dashed underlines.
Solution:   Add the termcap entries and highlight modes. (closes #9553)
This commit is contained in:
Bram Moolenaar
2022-06-29 18:39:11 +01:00
parent 8b5901e2f9
commit 84f5463630
16 changed files with 137 additions and 35 deletions
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20
runtime/doc/syntax.txt
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@ -5002,14 +5002,18 @@ the same syntax file on all terminals, and use the optimal highlighting.
1. highlight arguments for normal terminals
*bold* *underline* *undercurl*
*inverse* *italic* *standout*
*nocombine* *strikethrough*
*underdouble* *underdotted*
*underdashed* *inverse* *italic*
*standout* *nocombine* *strikethrough*
term={attr-list} *attr-list* *highlight-term* *E418*
attr-list is a comma-separated list (without spaces) of the
following items (in any order):
bold
underline
undercurl not always available
underdouble not always available
underdotted not always available
underdashed not always available
strikethrough not always available
reverse
inverse same as reverse
@ -5020,6 +5024,7 @@ term={attr-list} *attr-list* *highlight-term* *E418*
Note that "bold" can be used here and by using a bold font. They
have the same effect.
*underline-codes*
"undercurl" is a curly underline. When "undercurl" is not possible
then "underline" is used. In general "undercurl" and "strikethrough"
are only available in the GUI and some terminals. The color is set
@ -5028,6 +5033,17 @@ term={attr-list} *attr-list* *highlight-term* *E418*
let &t_Cs = "\e[4:3m"
let &t_Ce = "\e[4:0m"
< "underdouble" is a double underline, "underdotted" is a dotted
underline and "underdashed" is a dashed underline. These are only
supported by some terminals. If your terminal supports them you may
have to specify the codes like this: >
let &t_Us = "\e[4:2m"
let &t_ds = "\e[4:4m"
let &t_Ds = "\e[4:5m"
< They are reset with |t_Ce|, the same as curly underline (undercurl).
When t_Us, t_ds or t_Ds is not set then underline will be used as a
fallback.
start={term-list} *highlight-start* *E422*
stop={term-list} *term-list* *highlight-stop*