.vimrc

" ==================================================
" VIMRC file for David Winterbottom (@codeinthehole)
" ==================================================

" Inspiration {{{
" -----------
" See http://www.youtube.com/watch?v=aHm36-na4-4
"
" Good articles:
" - http://alexpounds.com/blog/2014/06/06/the-vimrc-antiques-roadshow
" }}}

" Core {{{
" ----
" Use Vim settings, rather then Vi settings (much better!).
" This must be first, because it changes other options as a side effect.
set nocompatible

" Switch syntax highlighting on when the terminal has colors
if &t_Co > 2 || has("syntax")
    syntax on
endif

filetype indent plugin on               " Turn on filetype detection

" }}}
 
" Leader keys {{{
" ----------- 
" Comma is easy to type
let mapleader = ","
let g:mapleader = ","
" }}}

" Editing behaviour {{{
set backspace=indent,eol,start          " Allow backspacing over everything in insert mode
set scrolloff=3                         " Controls when to scroll winow
set showmatch                           " Show matching delimiters
set noshowmode                          " Don't show mode changes
set matchtime=1                         " Jump to matching bracket for 2/10ths of a second
set autoindent                          " Always set autoindenting on
set si                                  " Smart indenting
set nowrap                              " Don't word wrap
set tabstop=4                           " Length of tab
set expandtab                           " Expand tabs into space
set shiftwidth=4
set softtabstop=4
set shiftround                          " Round indent to multiple of 'shiftwidth'
set smarttab                            " Allow backspacing of a shiftwidth of spaces
set noeol                               " Prevent a carriage return at end of last line
set lazyredraw                          " Don't redraw while executing macros (for performance)

" Treat hyphens as part of a word
set iskeyword+=-

" }}}

" Command line behaviour {{{
set completeopt=menu,longest,preview    " Insert mode completion options
set complete-=i
set history=1000                        " Number of lines in command line history
set showcmd                             " Display incomplete commands
set wildmenu                            " Use menu to show command line completions
set wildmode=list:longest,full          " Command-line completion
set wildignore+=*.pyc,*egg-info*
set shellslash                          " A forward slash is used when expanding filenames
set cmdheight=2                         " Try and avoid the dreaded "press <Enter> to continue" by setting the 
                                        " the height of the command bar
" }}}

" Appearance {{{
set ruler                               " Show the cursor position all the time in the status bar
set pastetoggle=<F11>                   " Toggle paste mode using F11
set number                              " Line numbers on by default
set confirm                             " Prompt for unsaved files
set title                               " Set window title to filename
let &titleold=""
set winminheight=0                    " Allows windows to be fully squashed
" }}}

" Folding {{{
set foldenable
set foldmethod=marker
set foldopen=block,hor,insert,jump,mark,percent,quickfix,search,tag,undo
" }}}

" Misc {{{
set enc=utf-8                           " Use UTF-8 as the default buffer encoding
set t_RV=                               " Don't request terminal version string
set mouse=a                             " Enables use of mouse in all modes
set mousehide                           " Hide mouse when typing
set ttyfast                             " Faster output (vim updates screen in bigger batches)
" }}}

" Display {{{
set shortmess=atI                       " Prevent file messages appearing
set visualbell                          " Rather than beeps
set virtualedit=block
" }}}

" Files/buffers {{{
set hidden                              " Don't abandon unloaded buffers
set fileformats=unix                    " File format
set autowrite                           " Auto-write file if modified on exit
set autoread                            " Auto-load file if it changes elsewhere
set nobackup                            " Don't keep a back-up file, they're annoying
set noswapfile
" }}}

" Searching {{{
set wrapscan                            " Wrap searching
set incsearch                           " Do incremental searching
set hlsearch                            " Highlight all search results (sometimes annoying)
set gdefault                            " Global setting on by default in subsituting
set ignorecase smartcase                " Smart search behaviour
set magic
if executable('ag') 
    set grepprg=ag\ --nogroup\ --nocolor\ --column
    set grepformat=%f:%l:%c%m
    " Use ag for CtrlP plugin (it doesn't need to cache as it's so fast)
    let g:ctrlp_user_command = 'ag %s -l --nocolor -g ""'
    let g:ctrlp_use_caching = 0
endif
" }}}

" History - keep undo history between sessions {{{
if has('persistent_undo')
    set undofile
    set undodir=~/.vim_undo
    set undolevels=2000
endif
" }}}

" GUI options {{{
if has("gui_running")
    " Set GUI options
    set guioptions-=m           " Lose toolbar, menu and scrollbar
    set guioptions-=T     
    set guioptions-=r    
    set guioptions-=L
    " Dimensions
    if &diff
        set columns=240
    else 
        set columns=120
    endif
    set lines=62
    " Colors/font
    set background=light                
    set guifont=Monaco:h14
    set selectmode=mouse,key,cmd
endif
" }}}

" Operator-pending mappings {{{ 

" Text object for string wrapped in spaces
" eg {{ asdf|asdf }}
" maybe use ciW
vnoremap i<space> :<c-u>silent! normal! T<space>vt<space><cr>
vnoremap a<space> :<c-u>silent! normal! F<space>ft<space><cr>
omap i<space> :normal vi<space><cr>
omap a<space> :normal va<space><cr>

" Text object for word within a method name
" eg here_is_my_method_name
" More people don't have _ in their word chars
vnoremap i_ :<c-u>silent! normal! T_vt_<cr>
vnoremap a_ :<c-u>silent! normal! F_vf_<cr>
omap i_ :normal vi_<cr>
omap a_ :normal va_<cr>

" Text object for next set of parentheses
onoremap in( :<c-u>normal! f(vi(<cr>
onoremap i/ :<c-u>normal! T/vt/<cr>

" URL path segment 
" eg /asdf/asdf/asdf
vnoremap i/ :<c-u>silent! normal! T/vt/<cr>
vnoremap a/ :<c-u>silent! normal! F/vf/<cr>
omap i/ :normal vi/<cr>
omap a/ :normal va/<cr>

" }}}

" Abbreviations {{{

" Auto-correct common typos

iabbrev si is
iabbrev tehn then

" }}}

" Mappings {{{
" ===========
 
" GLOBAL
" ------

" Make useless key useful again (UK Mac keyboard issue...)
set pastetoggle=§

" INSERT MODE
" -----------

" Alias for escape - see http://cloudhead.io/2010/04/24/staying-the-hell-out-of-insert-mode/
inoremap kj <ESC>
inoremap <ESC> <NOP>

" No more cursor keys! 
inoremap <Left>  <NOP>
inoremap <Right> <NOP>
inoremap <Up>    <NOP>
inoremap <Down>  <NOP>

" Mimic some emacs shortcuts that work in bash
inoremap <C-d> <ESC>ddi
inoremap <C-e> <ESC>A
inoremap <C-a> <ESC>I

" Save and quit from insert mode
inoremap <leader><leader> <ESC>:wq<CR>


" NORMAL MODE
" -----------

" Shortcut for :
nnoremap ; :

" Jump to alternate file
nnoremap <leader><leader> <c-^>

" Make yank consistent with other commands
nnoremap Y y$

" Disable unwanted keys
nnoremap K <NOP>

" Cursor moves up/down on the screen, not lines in the file
nmap j gj
nmap k gk

" Format paragraph
nnoremap Q gqap

" Stop cursor jumping when joining lines
nnoremap J mzJ`z

" Put result in centre of window when jumping between search results
nnoremap n nzz
nnoremap N Nzz

" Space is pager
nnoremap <Space> <PageDown>

" Jump between search matches when using :grep
nmap <silent> <RIGHT> :cnext<CR>
nmap <silent> <RIGHT><RIGHT> :cnfile<CR><C-G> 
nmap <silent> <LEFT> :cprev<CR>
nmap <silent> <LEFT><LEFT> :cpfile<CR><C-G>

" Typos
nmap :W :w                  
nmap :E :e
nmap :Q :q

" Use backspace to turn off highlighted search terms
nnoremap <BS> :nohlsearch<CR>

" Select the last thing pasted
nnoremap gV `[v`]

" Leading mappings
" ----------------

" Faster saving and quiting
nnoremap <leader>w :w!<CR>
nnoremap <leader>q :q<CR>
nnoremap <leader>x :xa<CR>

" Change to current directory
nnoremap <leader>cd :cd %:p:h<CR>:pwd<CR>

" Toggle paste mode
nnoremap <leader>pp :setlocal paste!<CR>

" Sort paragraph under cursor (useful for python imports)
nnoremap <leader>s vip : !sort<CR>

" Change to current directory
nnoremap <leader>f :CtrlP<CR>

" Diff behaviour
nnoremap <leader>u :diffupdate<cr>
nnoremap <leader>g :diffget<cr>
nnoremap <leader>p :diffput<cr>
set diffopt+=iwhite

" Quick file access
nnoremap <leader>b :e ~/.bashrc<CR>
nnoremap <leader>a :e ~/.bash_aliases<CR>
nnoremap <leader>i :e ~/.inputrc<CR>    
nnoremap <leader>g :e ~/.gitconfig<CR>
nnoremap <leader>v :e $VIRTUAL_ENV/lib/python2.7/site-packages/
nnoremap <leader>o :e ~/Workspace/django-oscar/oscar/
nnoremap <leader>h :help<SPACE>

" Always use verymagic search mode
" nnoremap / /\v

" VISUAL MODE
" -----------

" Remap escape (annoying?)
vnoremap kj <ESC>

" When in visual mode, retain visual selection after action
vmap <expr> > ShiftAndKeepVisualSelection(">") 
vmap <expr> < ShiftAndKeepVisualSelection("<")
function! ShiftAndKeepVisualSelection(cmd) 
    set nosmartindent
    if mode() =~ '[Vv]'
        return a:cmd . ":set smartindent\<CR>gv" 
    else
        return a:cmd . ":set smartindent\<CR>"
    endif 
endfunction

" }}}

" Plugins {{{
" -------

" Pathogen (loaded this way so it works on remote servers where
" autoload/pathogen.vim might not exist). See
" https://github.com/tpope/vim-pathogen/issues/134
runtime! autoload/pathogen.vim
if exists("*pathogen#infect")
    call pathogen#infect()
    call pathogen#helptags()
endif

" Mini buffer explorer
let g:miniBufExplSplitBelow = 0             " Put new window above
let g:miniBufExplMapWindowNavVim = 1        " Allow CTRL+hj,k,l to jump between windows
let g:miniBufExplMapWindowNavArrows = 1     " Allow CTRL+arrows to jump between windows
let g:miniBufExplMapCTabSwitchBufs = 1      " CTRL+tab to jump between buffers
let g:miniBufExplModSelTarget = 1
let g:miniBufExplUseSingleClick = 1         " Single click to load buffer
map <Leader>b :MiniBufExplorer<CR>
map <Leader>bu :UMiniBufExplorer<CR>

" NERD_tree config
let NERDTreeIgnore = ['.pyc$', '\~$']
nnoremap <leader>n :NERDTreeToggle<CR>

" riv (RST editing)
let g:riv_fold_auto_update = 0              " Don't update folds on write

" }}}

" Status bar {{{
set showmode                            " Display which mode we're in
set laststatus=2                        " Always show status bar
if has('statusline') 
    " Notes:
    " %n = buffer number
    " %f = path to file
    " %y = filetype
    " %l = line number
    " %L = total lines in file
    " 
    set statusline=%n\:\ %f\ %y\ 
    set statusline+=%=
    set statusline+=col\ %c\ line\ %l/%L
endif
" }}}

" Tags {{{
" ----

set tags=$VIRTUAL_ENV/tags,~/tags;/

" }}}

" Autocommands {{{
" ------------

" Save view on exit
autocmd BufWinLeave ?* silent mkview
autocmd BufWinEnter ?* silent loadview

" Better settings for Git commit messages
autocmd Filetype gitcommit setlocal spell textwidth=72

" Delete trailing whitespace when saving python files
autocmd BufWrite *.py :call DeleteTrailingWS()
function! DeleteTrailingWS()
    exe "normal mz"
    %s/\s\+$//ge
    exe "normal `z"
endfunction

" Set multiple filetypes for some types so that multiple snippet files
" are loaded.
autocmd FileType python set ft=python.django 
autocmd FileType html set ft=htmldjango.html

" Some other filetypes
autocmd BufRead,BufNewFile *.md set filetype=markdown
autocmd BufRead,BufNewFile *.scala set filetype=scala
autocmd BufRead,BufNewFile *.pp set filetype puppet
autocmd BufRead,BufNewFile *.sls set filetype=yaml
 
" Auto-source vimrc after save
augroup VimReload
    autocmd!
    autocmd BufWritePost $MYVIMRC source $MYVIMRC
augroup END

" }}}

" Colorscheme (put them in ~/.vim/colors) {{{
" These needs to be near the end of ~/.vimrc for some reason
if &t_Co >= 256 || has("gui_running")
    " Don't complain if colorscheme doesn't exist
    silent! colorscheme peaksea
    set background=light
endif
" }}}