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copied!<p>The title of the question might cause misunderstanding. What you want to do is to define a new operator like <code>y</code>, <code>d</code> and <code>c</code>, neither motions nor text objects, isn't it? <a href="http://vimdoc.sourceforge.net/htmldoc/map.html#:map-operator" rel="noreferrer"><code>:help :map-operator</code></a> describes how to define a new operator. To take a parameter like the surround plugin, use <code>getchar()</code> in your <code>'operatorfunc'</code>.</p> <p>Though <code>:help :map-operator</code> describes the basics, it's a bit troublesome to deal with arguments passed to <code>'operatorfunc'</code>. You can use <a href="https://github.com/kana/vim-operator-user" rel="noreferrer">vim-operator-user</a> to simplify the handling of arguments. With this plugin, surround-like operator can be written as follows:</p> <pre><code>function! OperatorSurround(motion_wise) let _c = getchar() let c = type(_c) == type(0) ? nr2char(_c) : _c if c ==# "\<Esc>" || c == "\<C-c>" return endif let bp = getpos("'[") let ep = getpos("']") if a:motion_wise ==# 'char' call setpos('.', ep) execute "normal! \"=c\<Return>p" call setpos('.', bp) execute "normal! \"=c\<Return>P" elseif a:motion_wise ==# 'line' let indent = matchstr(getline('.'), '^\s*') call append(ep[1], indent . c) call append(bp[1] - 1, indent . c) elseif a:motion_wise ==# 'block' execute bp[1].','.ep[1].'substitute/\%'.ep[2].'c.\zs/\=c/' execute bp[1].','.ep[1].'substitute/\%'.bp[2].'c\zs/\=c/' call setpos('.', bp) else endif endfunction call operator#user#define('surround', 'OperatorSurround') map s <Plug>(operator-surround) </code></pre> <p>If you really want to define your own text objects, please consider <a href="https://github.com/kana/vim-textobj-user" rel="noreferrer">vim-textobj-user</a>.</p>

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