Anton Lindqvist wrote:
> Hi,
> This patch adds a function with the declaration optiontype({option})
> which returns the type of the given option. I'm currently using it to
> achieve the following option toggle mapping:
>
> " :NMapChangeOption[!] {letter} {option} [enable]
> "
> " Create a normal mode option toggle mapping for {option}. The mapping key
> " sequence will be prefixed with 'co' followed by {letter}.
> "
> " By default the option will only be changed in the current buffer. Using
> [!]
> " will change the option globally.
> "
> " Boolean option example:
> "
> " :NMapChangeOption s spell
> "
> " Pressing 'cos' will toggle the spell option on and off.
> "
> " Non boolean option example:
> "
> " :NMapChangeOption y syntax ON
> "
> " The optional [enable] argument can be used for string and comma separated
> " list options. Pressing 'coy' will add/remove 'ON' from the syntax option.
> "
> " This functionality is borrowed from Tim Pope's unimpaired.vim plugin.
> command! -bang -complete=option -nargs=+ NMapChangeOption
> \ call s:NMapChangeOption(<bang>0, <f-args>)
> func! s:NMapChangeOption(global, letter, option, ...) abort
> let set = a:global ? 'set' : 'setlocal'
> let type = optiontype(a:option)
> if type == 0 " boolean
> let rhs = printf(':%s <C-R>=&%s ? "no" : ""<CR>%s<CR>',
> \ set, a:option, a:option)
> elseif type == 2 " comma separated list
> let rhs = printf(':%s %s<C-R>=&%s !~# "%s" ? "+=" : "-="<CR>%s<CR>',
> \ set, a:option, a:option, a:1, a:1)
> elseif type == 4 " string
> let rhs = printf(':%s %s<C-R>=&%s == "%s" ? "&" : "=%s"<CR><CR>',
> \ set, a:option, a:option, a:1, a:1)
> endif
> exe 'nnoremap co' . a:letter rhs
> endfunc
>
> NMapChangeOption c colorcolumn +1
> NMapChangeOption! h hlsearch
> NMapChangeOption l list
> NMapChangeOption! p paste
> NMapChangeOption s spell
> NMapChangeOption w wrap
> NMapChangeOption y syntax ON
>
> The patch includes tests and docs.
I can see how this would be useful. But returning just a number is
limited. There are many more properties of an option, such as whether
it is window-local, was set or not, can be set from a modeline, etc.
Not that we need to add all those properties now, but I'm sure someone
will want to add them later. Perhaps using "optionproperties()" and
returning a Dictionary?
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