" Max's .vimrc

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" Plugins
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execute pathogen#infect()

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" Basic editing config
""""""""""""""""""""""

set term=xterm-256color

set nocompatible

colorscheme maxbucknell

" Leader
"
" Using space as leader is actually a terrific idea. It's one of the
" easiest things to hit on the keyboard.
let mapleader = "\<space>"

" Don't wrap lines
"
" I look at a lot of CSV files and logs, which are generally the only
" times I see long lines. If code is too long, I shorten it. As such,
" having lines artificially wrapping only gets in my way.
set nowrap

" Line numbering
"
" This shows the real line number of the current line, and relative
" line numbers on the other lines. Relative line numbers are good to
" know how many lines to yank, delete, or move.
set number
set relativenumber

" Write before commands
"
" This means that if I have unsaved changes, they get saved before
" executing a git commit, or something like that.
set autowrite

" Open splits in better places
"
" This seems to be the most logical way to split, in the direction
" that we read, and in agreement with Tmux.
set splitbelow
set splitright

" Quicker window movement
"
" Just remove an extra keystroke
nnoremap <C-j> <C-w>j
nnoremap <C-k> <C-w>k
nnoremap <C-h> <C-w>h
nnoremap <C-l> <C-w>l

" Set editor shell to bash, for Syntastic compatibility
set shell=bash

" Find files
"
" My fuzzy file finder has changed, but the commands I use to interact
" with it have not. These have the advantage of being close together on
" my keyboard, as well as vaguely mnemonic.
nnoremap <leader>t :call PickFile()<cr>
nnoremap <leader>b :call PickBuffer()<cr>
nnoremap <leader>n :call PickFileVerticalSplit()<cr>

" Tab config options
"
" In general, I prefer spaces to tabs, and 2-space indentation. These
" settings just make that consistent, so I rarely have to think about
" it.
set expandtab
set tabstop=2
set shiftwidth=2
set softtabstop=2
set autoindent

" Disable creation of swap files.
"
" Swap files serve a purpose, but not to me. I write often, and so
" these just get in the way.
set nobackup
set nowritebackup
set noswapfile

" What the hell is ex mode
"
" Whatever it is, I don't like it.
nnoremap Q <nop>

" Faster highlight removal than ;noh
"
" :noh is the command one should run to remove highlighted search
" terms. I search for things so often, that I got sick of typing it
" so much. So I made a short cut.
nnoremap <silent> <leader>/ :noh<cr>

" Remap semi-colon to colon.
"
" Colon is the starting point of a lot of actions in Vim. And I
" shouldn't have to hold a modifier key to access so much
" essential functionality.
noremap ; :
noremap ;; ;

" Quick exit insert mode
"
" Escape is at the far corner of my keyboard, and having it so far away
" was discouraging my from exiting insert mode. Qwerty users can remap
" jk to <esc>, which is a far better solution. The keys are next to each
" other, and it makes exiting insert mode a pleasant rolling motion.
" Moreover, when in normal mode, jk is a no-op.
"
" As a dvorak user, jk was too cumbersome, but there were no other
" suitable candidates. hh is inferior in that it is not a no-op in
" normal mode, but it is just as easy to type. The only caveat is when
" an edit ends with h, which is why hhh will expand to place an h in
" the buffer before exiting.
"
" To encourage me to adopt the new style, I disable escape. That one is
" sure to mess up someone not familiar with my setup.
inoremap hh <esc>
inoremap hhh h<esc>
inoremap <esc> <nop>

" Bad arrow keys
"
" This will disable use of arrow keys in normal and insert modes. This
" is a good idea to get into the vim way. I don’t really use the arrow
" keys anymore.
"
" That said, I have reservations about the apparently egregious nature
" of the arrow keys. On my MacBook, they are quite close. Still, I can
" understand that it is better to rely only on the core keys that you
" know are within reach, not just the ones that happen to be on one
" computer.
inoremap <up> <nop>
inoremap <down> <nop>
inoremap <left> <nop>
inoremap <right> <nop>
noremap <up> <nop>
noremap <down> <nop>
noremap <left> <nop>
noremap <right> <nop>

" Move lines up and down
"
" These are very useful commands, especially for re-ordering things. I
" would like to make it possible to move hunks of code with similar
" shortcuts, but I haven't thought it through yet. I would also like
" to have something automated, wherein I could sort a list of things
" alphabetically.
noremap - ddp
noremap _ ddkP

" Uppercase an entire word.
"
" This is handy for things like constants. I have no caps lock, and
" holding shift can be a pain.
nnoremap <leader>u viwU

" Show me when my lines are too long
"
" I wish to limit my lines to 80 characters long. However, Vim creates
" the n+1th character when you have n characters in a line. Hence, when
" my line is 80 characters long, I see the red line. So, this is set to
" 82, meaning that I only see the line when my lines actually are too long.
call matchadd('ColorColumn', '\%82v', 100)

" Prevent K from being annoying
noremap K <nop>

" Edit and Reload .vimrc files
"
" When I hit something that bugs me, I usually think about what I can
" do to make it better. Then I forget. This keeps happening and I keep
" getting annoyed. These commands make it simple to quickly edit my
" vimrc, and then reload it.
nmap <silent> <Leader>ev :e $MYVIMRC<CR>
nmap <silent> <Leader>es :so $MYVIMRC<CR>

" Search options
"
" Show partial matches while searching
set incsearch

" Highlight other matches in the file
set hlsearch

" Show the next search result.
" By Damian Conway.
"
" This rewires n and N to do their normal thing, and then call the
" HLNext routine. This temporarily adds a new style to the next
" highlight.
nnoremap <silent> n   n:call HLNext(0.2)<cr>
nnoremap <silent> N   N:call HLNext(0.2)<cr>

" Blink the next match
function! HLNext (blinktime)
    let [bufnum, lnum, col, off] = getpos('.')
    let matchlen = strlen(matchstr(strpart(getline('.'),col-1),@/))
    let target_pat = '\c\%#'.@/
    let ring = matchadd('MBSearchNext', target_pat, 101)
    redraw
    exec 'sleep ' . float2nr(a:blinktime * 1000) . 'm'
    call matchdelete(ring)
    redraw
endfunction

" Disable match-paren
"
" It has really bad colours and it displays terribly.
let loaded_matchparen = 1

" Make searches case sensitive only if an upper case character has been typed
set ignorecase smartcase

" Prevent Vim from clobbering the scrollback buffer.
"
" This means that all of Vim's output is shown in the terminal screen
" history. This is ugly, but it's saved my bacon a few times. See
" http://www.shallowsky.com/linux/noaltscreen.html
set t_ti= t_te=

" Highlight current line
"
" It's good to have a sense of place.
set cursorline

" Ensure that the cursor never touches top or bottom of screen
"
" This controls the distance that the current line must maintain
" between the top and bottom of the screen. Setting this to a very
" large number will always keep the cursor vertically centered.
"
" I don't do this, because sometimes I wish to see something at the
" bottom of the buffer, so I can copy it at the top.
set scrolloff=4

" Allow backspacing over everything in insert mode
"
" By default, Vim will stop when it gets to the beginning of a line,
" throw its arms in the air and give up.
set backspace=indent,eol,start

" Display incomplete commands and the lines they apply to.
set showcmd

" Allow hidden buffers
"
" If this is off, buffers are destroyed when they fade out of view. We
" have the memory to spare to keep them around.
set hidden

" Enable highlighting for syntax
syntax on

" Enable file type detection.
"
" Use the default filetype settings, so that mail gets 'tw' set to 72,
" 'cindent' is on in C files, etc.
" Also load indent files, to automatically do language-dependent
" indenting.
filetype plugin indent on

" Insert only one space when joining lines that contain
" sentence-terminating punctuation like `.`.
set nojoinspaces

" If a file is changed outside of vim, automatically reload it
set autoread

" Show trailing whitespace, since it's a crime
set list
set listchars=trail:·,tab:‣\ 

" Turn off code folding
"
" I hate code folding. It makes me mad. I just want a buffer with all
" of my text in it, no funny business.
set foldmethod=manual
set nofoldenable
let g:vim_markdown_folding_disabled=1
let g:vimtex_fold_enabled=0

" Always show status bar
set laststatus=2

" Pastetoggle to let Vim paste things without auto stuff
set pastetoggle=<F2>

"""""""""""""""""
" Custom autocmds
"""""""""""""""""

augroup vimrcEx
  " Clear all autocmds in the group
  autocmd!
  autocmd FileType text setlocal textwidth=78
  " Jump to last cursor position unless it's invalid or in an event handler
  autocmd BufReadPost *
    \ if line("'\"") > 0 && line("'\"") <= line("$") |
    \   exe "normal g`\"" |
    \ endif

  " Language whitespace settings
  autocmd FileType json,c,xml,java,php,python setl sw=4 sts=4
  autocmd FileType
    \ make
    \ setl noet sw=8 sts=8 ts=8

  " Hard wrap prose
  "
  " This will automatically insert a new line in insert mode when a
  " line gets too long (above 80 characters). I can also run gqap
  " in normal mode to reflow a paragraph.
  "
  " I would like to have a customised version of this work with
  " comments in code, but I haven't gotten that far yet.
  autocmd FileType
    \ markdown,
    \ setl tw=80 fo=t1

  " Create files when opened
  autocmd BufNewFile * write
augroup END

" Set the statusline.
" This shows something like:
"
"   [vim/vimrc.symlink] [351,30] [vim]
set statusline=[%f] " filename
set statusline+=\ [%l,\ %c] "line and column number
set statusline+=\ %y " filetype
set statusline+=\ %{SyntasticStatuslineFlag()} " syntastic errors

" Syntastic.
"
" I need to for Syntastic, and maybe send them a pull request. I detest
" signs in my gutter, but having signs on is the only way to add the
" line styles I need to colour my lines red. I need to split these out.
let g:syntastic_enable_signs = 0
let g:syntastic_javascript_checkers = ['eslint']
let g:syntastic_stl_format='[%t errors, first: %F]'

" Copy visual selection to clipboard.
noremap <leader>y "*y

" Go to most recently edited file
nnoremap <leader><leader> <c-^>

" Disable syntax hiding in JSON
"
" Vim JSON provides a fancy way of viewing, where it hides quotes and
" just shows you data. I don't want that.
let g:vim_json_syntax_conceal = 0

" Show syntax highlighting groups for word under cursor
"
" This is useful for finding rogue elements I forgot in my colour
" scheme.
nnoremap <leader>\ :call <SID>SynStack()<CR>
function! <SID>SynStack()
  if !exists("*synstack")
    return
  endif
  echo map(synstack(line('.'), col('.')), 'synIDattr(v:val,"name")')
endfunc