Is there a way to get integer object motions in vim?

Question

I often work on CSS files or other files that require twiddling numbers. I would love the ability to have a key that refers to integers much in the way that w refers to a word, or ( refers to a sentence. For example, in a css file I could navigate to the beginning of a height declaration, and change it's value without having to retype "px" a the end, which is what happens if I use w.

Is there such a thing, but I'm missing it in the documentation, or is there a way to add this functionality to my .vimrc?

Bonus points if there were a way to use it like ci" where I could be at the begining of the line and use the "change internal" command to jump to AND change the next integer.

More bonus points if I could do simple arithmetic. I would love to be able to issue a concise command that was short for "Add too, internal, integer, 5" and have the next integer on the current line be five grater then it was when I started.

Edit:

Some really great proposals everyone, some great ideas that are sure to improve my work. Thanks! Hassek's answer is probably the most likely to end up in my work-flow, but none of the others seem to have (fully) answered my inital question: A motion that works on integers. The proposal tracked down by romainl appears to have that goal, but I can't get it to work reliably.

For myself (and others perhaps) I will clarify my wants below:

A key that acts much in the way w acts for words, but on integers so that I can simply add it to my mental vim vocabulary and use it seamlessly. This includes the following scenarios. (I will use d as my example key):

1. Normal mode d: Jump to the next integer
2. Normal mode cd: Change to the end of the integer under the cursor (Note that cw is a special case that SHOULD change to the NEXT word. cw actually acts like ce.) I would expect this special case to be implemented with integers as well
3. Visual mode id: Select [count] integers.
4. Visual mode ad: Select [count] integers. Leading or trailing white space is included.

Am I missing any behavior that w has that might be expected for a new motion? Is there even a key available in both normal and visual modes?

Answer 1

you can add or substract from integers using this commands:

<num>Ctrl-a (to add)
<num>Ctrl-x (to substract)

and it will go right to the next number in line and execute the command

Answer 2

See this proposal. It looks good.

edit

Indeed that one is quite nice. This made me think that my habit of doing /<number><Esc> was not very efficient so I've added these mappings (and slightly modified the mappings above for consistency) to my ~/.vimrc. Let's see if they are useful in the long run:

nnoremap è  /\v\d+<CR>
nnoremap é  ?\v\d+<CR>

At first sight, èciè132<Esc> seems to be marginally better than /2<Esc>{count}s132<Esc> in terms of keypresses but substantially better if it allows me to skip a. checking the first digit of the value I want to change and b. counting the characters to replace.

Time will tell.

re-edit

Here are the function and its mappings:

onoremap N  :<c-u>call <SID>NumberTextObject(0)<cr>
xnoremap N  :<c-u>call <SID>NumberTextObject(0)<cr>
onoremap aN :<c-u>call <SID>NumberTextObject(1)<cr>
xnoremap aN :<c-u>call <SID>NumberTextObject(1)<cr>
onoremap iN :<c-u>call <SID>NumberTextObject(1)<cr>
xnoremap iN :<c-u>call <SID>NumberTextObject(1)<cr>

function! s:NumberTextObject(whole)
    normal! v

    while getline('.')[col('.')] =~# '\v[0-9]'
        normal! l
    endwhile

    if a:whole
        normal! o

        while col('.') > 1 && getline('.')[col('.') - 2] =~# '\v[0-9]'
            normal! h
        endwhile
    endif
endfunction

With this, I can:

• vcdy part of a number from the cursor until its end with <command>N. Somehow similarly to <command>e or <command>w.

  Here are some random numbers: 24 7635 1000018
                                          ^--->
  

  It doesn't work if the cursor is not already on the number and it doesn't go backward.

• vcdy a whole number with <command>iN.

  Here are some random numbers: 24 7635 1000018
                                        <-^--->
  

  Again, it doesn't work if the cursor is not already on the number.

The whole thing could be improved, sure, but that's a start!

endedit

I work a lot with CSS, too.

I use two strategies to change numerical values:

• {count}<C-a> and {count}<C-x>, as in Hassek's answer, when I know by how much I want to increment/decrement the number. Say I want to turn 20px into 25px, a simple 5<C-a> does the trick without requiring me to move the cursor to the number. This is extremely cool.

• /<number><CR>{count}s<new number> when the new value is very different from the current value and I feel to lazy to calculate the delta. /2<CR>2s67<Esc> would allow me to change 23px into 67px. /2<CR>R67<Esc> is another way but it's only good if the new value as the same length as the current value. Use f<number> if you are on the same line.

Note that you can insert the result of expressions with <C-r>=137-42<CR> which I use it very often as well.