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Currently, I use this:
map <F7> <Esc>:if has("gui_running")<Bar>hi comment gui=bold<Bar>else<Bar>hi comment cterm=bold<Bar>endif<LF>
It turns comments bold in terminal or in GUI when I press <F7>.
And I would like it also to toggle the bold text. Is there a way to do this?
Something like:
if hi comment gui == bold
hi comment gui=none
else
hi comment gui=bold
endif
You can get the current settings of a highlight group with the :highlight command. For example:
:highlight Comment
Comment xxx term=bold ctermfg=4 guifg=Blue
This will just output the text; there is (as far as I know), no VimScript function to get the same text in a string, but not all is lost, since we can use the :redir command to redirect the output of a command to a variable.
We can then match this, and call the appropriate :highlight command.
Putting that all together, we end up with this function:
fun! ToggleHighlight()
" Redirect output of :highlight to l:current
redir => l:current
silent highlight Comment
redir END
if l:current =~# '\(cterm\|gui\)=bold'
highlight Comment gui=none cterm=none
else
highlight Comment gui=none cterm=bold
endif
endfun
And you can map this function to <F7> with:
noremap <F7> <Esc>:call ToggleComments()<CR>
cterm or gui attributes.
Jun 28 '15 at 0:35
noremap, which is the same as map but non-recursive. See Learn VimScript the Hard way chapters 3 through 5 (especially chapter 5) to learn why you should always use noremap and never map.
Jun 28 '15 at 0:46
:echo synIDattr(synIDtrans(hlID('Comment')), 'bold', 'gui') to check for bold mode for gui. See the help at :h synIDattr for all the arguments.
Sep 3 '15 at 9:24
This mapping is probably more suited to a mapping which calls a function, since it contains so many commands. Here is my best shot at this:
" This just uses the call command to run the ToggleBoldComments function
nnoremap <F7> :call ToggleBoldComments()<CR>
function! ToggleBoldComments()
" Make a variable in the current buffer to keep track of whether the
" comments are bold or not.
if !exists("g:comments_bold")
let g:comments_bold = 0
endif
" If comments aren't already bold, make it so.
if g:comments_bold == 0
let g:comments_bold = 1
hi comment gui=bold cterm=bold
return 0
elseif g:comments_bold == 1
" Same, except the other way around.
let g:comments_bold = 0
hi comment gui=none cterm=none
endif
endfunction
Here are the relevant help topics (I recommend you read these if you want to know more about how this mapping works):
:help :function:help :call:help exists():help g::help internal-variables:help :highlight
:hi comment gui=bold cterm=bold, no need for theifstatement here.