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VIM plugin to move (or visually select) the next/previous class, method or function
VimL
branch: master

README.rst

Chapa

Allows you to move to previous/next N class, function or method

or visually select the next/previous N class, function or method

or comment (or toggle) out the next/previous N class, function or method.

As this is a "file-type plugin", it currently supports both Python and Ruby.

Watch the screencast: http://vimeo.com/19016562

Install it from: http://www.vim.org/scripts/script.php?script_id=3395

Installation couldn't be easier: drop the ftplugin file in your vim ftplugin directory. For example, if you are using Python, this would be something like:

~/.vim/ftplugin/python/chapa.vim

I would highly recommend you use something like Pathogen though, it makes dealing with VIM plugins way easier.

1. Intro

After trying other plugins that were supposed to achieve this objective (and fail) I decided to write it on my own.

No need to have VIM compiled with Python or Ruby support since this plugin uses pure VIM syntax.

2. Usage

There are a couple of routes you can take: with or without default mappings.

If you want to define your own mappings then no need to do anything else other than know the actual plugin calls (listed below).

If you want the default mappings (also listed below) you need to add this to your vimrc:

let g:chapa_default_mappings = 1

You can also make the repeat actions for the plugin optional. If the above variable is set but you don't like the repeat mappings, set the following in your vimrc:

let g:chapa_no_repeat_mappings = 1

You can map those callables to anything you want, but below is how the defaults are mapped:

" Repeat Mappings
nmap <buffer> <C-h> <Plug>ChapaOppositeRepeat
nmap <buffer> <C-l> <Plug>ChapaRepeat

" Function Movement
nmap <buffer> fnf <Plug>ChapaNextFunction
nmap <buffer> fif <Plug>ChapaInFunction
nmap <buffer> fpf <Plug>ChapaPreviousFunction

" Class Movement
nmap <buffer> fnc <Plug>ChapaNextClass
nmap <buffer> fic <Plug>ChapaInClass
nmap <buffer> fpc <Plug>ChapaPreviousClass

" Method Movement
nmap <buffer> fnm <Plug>ChapaNextMethod
nmap <buffer> fim <Plug>ChapaInMethod
nmap <buffer> fpm <Plug>ChapaPreviousMethod

" Class Visual Select
nmap <buffer> vnc <Plug>ChapaVisualNextClass
nmap <buffer> vic <Plug>ChapaVisualThisClass
nmap <buffer> vpc <Plug>ChapaVisualPreviousClass

" Method Visual Select
nmap <buffer> vnm <Plug>ChapaVisualNextMethod
nmap <buffer> vim <Plug>ChapaVisualThisMethod
nmap <buffer> vpm <Plug>ChapaVisualPreviousMethod

" Function Visual Select
nmap <buffer> vnf <Plug>ChapaVisualNextFunction
nmap <buffer> vif <Plug>ChapaVisualThisFunction
nmap <buffer> vpf <Plug>ChapaVisualPreviousFunction

" Comment Class
nmap <buffer> cic <Plug>ChapaCommentThisClass
nmap <buffer> cnc <Plug>ChapaCommentNextClass
nmap <buffer> cpc <Plug>ChapaCommentPreviousClass

" Comment Method
nmap <buffer> cim <Plug>ChapaCommentThisMethod
nmap <buffer> cnm <Plug>ChapaCommentNextMethod
nmap <buffer> cpm <Plug>ChapaCommentPreviousMethod

" Comment Function
nmap <buffer> cif <Plug>ChapaCommentThisFunction
nmap <buffer> cnf <Plug>ChapaCommentNextFunction
nmap <buffer> cpf <Plug>ChapaCommentPreviousFunction

" Folding Method
nmap <buffer> zim <Plug>ChapaFoldThisMethod
nmap <buffer> znm <Plug>ChapaFoldNextMethod
nmap <buffer> zpm <Plug>ChapaFoldPreviousMethod

" Folding Class
nmap <buffer> zic <Plug>ChapaFoldThisClass
nmap <buffer> znc <Plug>ChapaFoldNextClass
nmap <buffer> zpc <Plug>ChapaFoldPreviousClass

" Folding Function
nmap <buffer> zif <Plug>ChapaFoldThisFunction
nmap <buffer> znf <Plug>ChapaFoldNextFunction
nmap <buffer> zpf <Plug>ChapaFoldPreviousFunction

Since these should only be defined for buffers of the supported filetypes, if you don't enable the default mappings you'll want to define your own through e.g. ~/.vim/after/ftplugin/python.vim or with autocmds.

If the requested search (function, class or method) is not found, the call simply returns and nothing should happen. However, there is an error message that should display by default, explaining what it was supposed to search and in what direction.

You can disable this by adding a chapa-specific variable in your vimrc:

let g:chapa_messages = 0

You can also add a "count" to repeat the match N times. So if you want to go to the 3rd previous class you would (with the mappings above) do something like:

3fpc

The same applies for visual selections. If you want to visually select the 3rd next method, you would do it like:

3vnm

You can also toggle comments of a given class, method or function. To comment the next class:

cnc

If the class is already commented, the command above will remove the comments.

If you are moving around, the plugin allows you to repeat the forward or reverse (opposite to the original) move. For example, if you searched for the next function like:

fpf

Then <C-l> repeats that same command for you and moves you in the same direction. If you want to go in the opposite movement, then <C-h> is your friend.

3. License

MIT Copyright (c) 2010-2011 Alfredo Deza <alfredodeza [at] gmail [dot] com>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

4. Bugs

If you find a bug please post it on the issue tracker: https://github.com/alfredodeza/chapa.vim/issues

5. Credits

A lot of the code for this plugin was adapted/copied from python.vim and python_fn.vim authored by Jon Franklin and Mikael Berthe.

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