argwrap.vim

argwrap.vim is an industrial strength argument wrapping and unwrapping extension for the Vim text editor. It can be used for collapsing and expanding everything from function calls to array and dictionary definitions. The online resources listed below can be accessed to download new versions of this extension and to access other related information.

• Homepage
• GitHub

Installation

1. Clone or otherwise download the latest version of the argwrap.vim extension from its GitHub page (the script is also available for download through vim.org). If you are using pathogen.vim for plugin management (you should) you can clone the repository directly to your bundle directory:

   git clone https://github.com/FooSoft/vim-argwrap ~/.vim/bundle/vim-argwrap

2. Create a keyboard binding for argwrap#toggle() inside your ~/.vimrc file. For example, to declare a normal mode mapping, add the following command:

   nnoremap <silent> <leader>w :call argwrap#toggle()<CR>

   The toggle function receives an optional style argument, which may be either "default" or "bx". Not providing an explicit value is equivalent to specifying the "default" setting. The style determines the wrapping behavior as seen below:

   Default-style argument wrapping:

   Foo(
       wibble,
       wobble,
       wubble
   )
   

   Bx-style argument wrapping:

   Foo(wibble
       , wobble
       , wubble
       )
   

Usage

1. Position the cursor inside of the scope of the parenthesis, brackets or curly braces you wish to wrap/unwrap (not on top, before or after them).

2. Execute the keyboard binding you defined above to toggle the wrapping and unwrapping of arguments.

Examples

Below are some examples of common use cases demonstrating the capabilities of argwrap.vim. Note that the extension functions identically regardless if it is being applied to a function call, list or dictionary definition.

Let's begin with a simple function invocation. When there are many arguments being passed to the function, we often wish to wrap them to improve code readability. If you position your cursor anywhere between the parenthesis and execute the argwrap#toggle() command, the argument list will be wrapped to one per line.

Foo(wibble, wobble, wubble)

Becomes this:

Foo(
    wibble,
    wobble,
    wubble
)

List definitions work in a similar fashion:

foo = [bar, baz, qux, quux, corge]

Becomes this:

foo = [
    bar,
    baz,
    qux,
    quux,
    corge
]

Dictionaries also work the way you expected them to:

foo = {bar: 1, baz: 3, qux: 3, quux: 7}

Becomes this:

foo = {
    bar: 1,
    baz: 3,
    qux: 3,
    quux: 7
}

Finally, nested combinations of all the above are also supported:

Foo([wibble, wobble, wubble], spam, {bar: baz, qux: [1, 3, 3, 7]})

Becomes this:

Foo(
    [wibble, wobble, wubble],
    spam,
    {bar: baz, qux: [1, 3, 3, 7]}
)

You can continue argument expansion to:

Foo(
    [
        wibble,
        wobble,
        wubble
    ],
    spam,
    {
        bar: baz,
        qux: [
            1,
            3,
            3,
            7
        ]
    }
)

The argument wrapping and unwrapping operations demonstrated above are easily reversible and correctly preserve the indentation of the surrounding code. This extension has been tested to work in scenarios of various complexity, but if you discover a problem don't hesitate to report it.