cursorline/cursorcolumn highlighting

[Bee]

When I present source code, it is easier if I use cursorline/
cursorcolumn highlighting to direct eyes to the relevant section.

I wanted a function key to turn on and off the highlighting, but did
not want to dedicate more than one of those valuable resources. So...
in this example F7 cycles thru the cursorline and cursorcolumn
highlighting.

For Vim versions older that 7, it only moves the line to the center of
the screen.

I am somewhat new to Vim scripting, please comment or suggest
improvements.

" toggle cursorline/cursorcolumn or center line
nmap <F7> zz
if version >= 700 " NONE turns off underlining
highlight CursorLine NONE ctermbg=Yellow
highlight CursorColumn NONE ctermbg=Yellow
let s:lico=0
function LiCo()
let s:lico=s:lico>2 ?0 :s:lico+1
let &cursorline=s:lico % 2
let &cursorcolumn=s:lico / 2
endfun
nmap <silent> <F7> :call LiCo()<cr>
endif
imap <F7> <c-o><F7>
vmap <F7> <c-c><F7>gv

[Gary Johnson]

On 2009-12-24, Bee wrote:
> When I present source code, it is easier if I use cursorline/
> cursorcolumn highlighting to direct eyes to the relevant section.
>
> I wanted a function key to turn on and off the highlighting, but did
> not want to dedicate more than one of those valuable resources. So...
> in this example F7 cycles thru the cursorline and cursorcolumn
> highlighting.
>
> For Vim versions older that 7, it only moves the line to the center of
> the screen.
>
> I am somewhat new to Vim scripting, please comment or suggest
> improvements.

You might be interested in

:set {option}!
:set inv{option}

either of which will toggle the value of {option}. See

:help E518

and skip to the fourth paragraph down.

Regards,
Gary

[Bee]

On Dec 24, 9:17 pm, Gary Johnson <garyj...@spocom.com> wrote:
> You might be interested in
> :set {option}!
> :set inv{option}

I know about them, but did not know the 'reset'.
:se[t] {option}&

I had been using:
:nmap <silent> <F7> :set cursorline!<cr>
:nmap <silent> ,<F7> :set cursorcolumn!<cr>

But decided that I wanted to cycle 1-4 with ONE key
and to learn something new:
1) off
2) cursorline
3) cursorcolumn
4) both cursorline and cursorcolumn

How can LiCo() be made buffer local?

let s:lico=0
function LiCo()
let s:lico=s:lico>2 ?0 :s:lico+1
let &cursorline=s:lico % 2
let &cursorcolumn=s:lico / 2
endfun

I tried b:lico in place of s:lico, it did not work.

[Gary Johnson]

That's odd. I just tried your function with b:lico and it worked
fine for me: each call to LiCo() advanced the state of the cursor
highlights as you described. I only tried it with one buffer.

Regards,
Gary

[Om Prakash Singh //Kotak /Bank]

Dear All,

This mail does not poertains to me. Please mark the same to right
person.

Thanks and Regards
Om Prakash Singh | Asst. Manager |Kotak Mahindra Bank Ltd.
5/27, Vishal Khand, Gomtinagar, Lucknow 226010 | D: (0522) 4151910 | M:
(+91) 9936250828

Regards,
Gary

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[Bee]

Gary Johnson wrote:
> That's odd. I just tried your function with b:lico and it
> worked fine for me: each call to LiCo() advanced the state of
> the cursor highlights as you described. I only tried it with
> one buffer.

Yes, odd. When I run the following I get errors.
Both terminal versions Vim 7.2.315 and Vi 6.2

" toggle cursorline/cursorcolumn or center line

highlight CursorLine NONE ctermbg=Yellow
highlight CursorColumn NONE ctermbg=Yellow

let b:lico=0
function LiCo()
let b:lico=b:lico>2 ?0 :b:lico+1
let &cursorline=b:lico % 2
let &cursorcolumn=b:lico / 2

endfun
nmap <silent> <F7> :call LiCo()<cr>

Error detected while processing function LiCo:
line 1:
E121: Undefined variable: b:lico
E15: Invalid expression: b:lico>2 ?0 :b:lico+1
line 2:
E121: Undefined variable: b:lico
E15: Invalid expression: b:lico % 2
line 3:
E121: Undefined variable: b:lico
E15: Invalid expression: b:lico / 2

--
Bill
Santa Cruz, California

[Gary Johnson]

I thought about that possibility last night. Your code initializes
b:lico only once, so for only one buffer. Here's a way to fix that
problem without using an autocommand. Change this

> let b:lico=0
> function LiCo()
> let b:lico=b:lico>2 ?0 :b:lico+1
> let &cursorline=b:lico % 2
> let &cursorcolumn=b:lico / 2
> endfun

to

function LiCo()
if !exists("b:lico")
let b:lico=0
endif

let b:lico=b:lico>2 ?0 :b:lico+1
let &cursorline=b:lico % 2
let &cursorcolumn=b:lico / 2
endfun

Untested, but I think that syntax is right.

Regards,
Gary

[Bee]

Thank you, that works and is a very good to know.