vim-swap

A Vim text editor plugin to swap delimited items.

What for?

Sometimes I want to reorder arguments of a function:

call func(arg1, arg2, arg3)

Indeed, it is not difficult to swap arg2 and arg3. Just cutting , arg2 and pasting it following arg3. However it is annoying to swap arg1 and arg3 because no way to avoid repeating cut&paste. Anyway I feel bothering in both cases. It should be automated such an boring processes!

How to use

This plugin defines three key mappings by default, g<, g>, gs. These all functions can be repeated by dot command.

g<

g< swaps the item under the cursor with the former item. Moving cursor on the arg2 and pressing g<, then it swaps arg2 and the former one, arg1, to get:

call foo(arg2, arg1, arg3)

g>

g> swaps the item under the cursor with the latter item. Moving cursor on the arg2 and pressing g>, then it swaps arg2 and the latter one, arg3, to get:

call foo(arg1, arg3, arg2)

gs

gs works more interactive. It starts "swap mode", as if there was the sub-mode of vim editor. In the mode, use h/l to swap items, j/k to choose item, numbers 1 ~ 9 to select nth item, u/<C-r> to undo/redo, g/G to group/ungroup items, s/S to sort, r to reverse, and as you know <Esc> to exit "swap mode". gs function can be used also in visual mode. In linewise-visual and blockwise-visual mode, this plugin always swaps in each line. For example, assume that the three lines were in a buffer:

foo
bar
baz

Select the three lines and press gsl<Esc>, then swaps the first line and the second line.

bar
foo
baz

Text objects

The following configuration enables text objects to select "swappable" items.

omap i, <Plug>(swap-textobject-i)
xmap i, <Plug>(swap-textobject-i)
omap a, <Plug>(swap-textobject-a)
xmap a, <Plug>(swap-textobject-a)

These text objects work well with [count] prefix.

Demo