krabu wrote:
> I need to highlight lines in grey text color, if there is not the keyword
> "column" OR if there is the keyword "noshow". I want the whole line to be
> affected, but the keywords are not at the beginning of the line.
One way to do it:
Add two highlight groups RegularLine, GreyLine:
:hilight RegularLine ctermbg=yellow
:hilight GreyLine ctermbg=grey
Add matches for the line you want, using priorities
" default: everything is GreyLine
:call matchadd("GreyLine", "^.*$", 5)
" ...except when 'column' appears anywhere on the line
:call matchadd("RegularLine, "^.*column.*$", 6)
" if 'noshow' is anywhere on the line, always stay GreyLine
:call matchadd("GreyLine, "^.noshow.$", 7)
This uses the priorities 5-7 to overrule previous matches.
In the following lines, only the line marked with (*) is RegularLine, all other
lines are GreyLine
line1
line2 column (*)
line3 column noshow
line1 is GreyLine, because there is no 'column'
line2 is RegularLine, because there is 'column'
line3 is GreyLine, because 'noshow' is on that line
> Another thing: is it possible to fold the affected lines?
Not directly from the matches AFAIK, but you can write a fold expression:
:set foldmethod=expr
:set
foldexpr=getline(v:lnum)=~'.*noshow.*'?1:(getline(v:lnum)=~'.*column.*'?0:1)
This will put every line that contains 'noshow' or not the keyword 'column' on
foldlevel 1, otherwise (keyword 'column' present, but not 'noshow') on foldlevel
0 (='not on a fold').
:set foldlevel=0
will fold the grey lines away.
--
Andreas.
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