dotfiles/vim/vimrc

""""""""
"" Plugin Loading with Pathogen
"""""""""""""""""""""""""""""""""""""""""""""""""""
call pathogen#infect()


""""""""
"" General Behaviours
"""""""""""""""""""""""""""""""""""""""""""""""""""

set nocompatible "Don't have to try to be compatible with old vi
set autoread "Read a file if it's changed from outside of vim
set splitbelow "New splits appear below current window instead of above
set ttyfast "Smooth movement

" Enable filetype specific features
filetype plugin on
filetype indent on

if version >= 700
    set mouse=a "mouse support for 7.x
endif 

" Source the vimrc file after saving it
autocmd! bufwritepost .vimrc source $MYVIMRC

" Remember last location in file
" Only do this part when compiled with support for autocommands
if has("autocmd")
  augroup redhat
    " In text files, always limit the width of text to 78 characters
    autocmd BufRead *.txt set tw=78
    " When editing a file, always jump to the last cursor position
    autocmd BufReadPost *
    \ if line("'\"") > 0 && line ("'\"") <= line("$") |
    \   exe "normal! g'\"" |
    \ endif
  augroup END 
endif

""""""""
"" Formatting
""""""""""""""""""""""""""""""""""""""""""""""""""""""

set tabstop=4 "actual tab press distance
set shiftwidth=4 "for autoindent
set softtabstop=4 " let backspace delete indent
set expandtab "change to single spaces
set autoindent "use last line to set next indent
set smartindent "guess harder, based on C-like language
set wrap lbr "wrap long lines of text
set backspace=eol,start,indent "backspace over everything


""""""""
"" UI - Colours
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syntax on
colorscheme desert
hi Folded ctermfg=darkred "set colour for folded lines

if version >= 730
    set colorcolumn=80
endif


""""""""
"" UI - Numbering
""""""""""""""""""""""""""""""""""""""""""""""""""""""""

set number "show line numbers
set ruler "show row,col count in status line
set laststatus=2 "always show a status line

if version >= 730
    set relativenumber "current line always 0 (requires 7.3 and up)
endif


""""""""
"" UI - Code Folding
""""""""""""""""""""""""""""""""""""""""""""""""""""""""

set foldmethod=indent
set foldlevel=5
set foldtext=MyFoldText()

function! MyFoldText()
    let line = getline(v:foldstart)
    let indent = indent(v:foldstart)
    let indentOnly = strpart(line, 0, indent-1)
    let linecount = v:foldend+1 - v:foldstart
    let plural = ""
    if linecount != 1
        let plural = "s"
    endif
    let foldtext = '+'.indentOnly.'... ('.linecount.' More lines)'
    return foldtext
endfunction


""""""""
"" UI - Search
""""""""""""""""""""""""""""""""""""""""""""""""""""""""

set hlsearch "make searches highlighted
set incsearch "vim will search as you type!
set ignorecase "ignore case for searches
set smartcase " well, unless a user puts in uppercase search characters
set magic "enables wildcard searching


""""""""
"" Key Remaps and Shortcuts 
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let mapleader = "," "Leader key lets you make more kinds of shortcuts!

" More convenient escape
imap ii <Esc>
imap II <Esc>

" Add extra lines up and down
map <leader>j o<Esc>k
map <leader>k O<Esc>j


""""""""
"" Key Remaps - Movement and Windows
""""""""""""""""""""""""""""""""""""""""""""""""""""""""

" Smart way to move btw. windows
map <C-j> <C-W>j
map <C-k> <C-W>k
map <C-h> <C-W>h
map <C-l> <C-W>l

" window resizing
noremap + <C-w>10+
noremap - <C-w>10-

" mapping to make movements operate on 1 screen line in wrap mode
function! ScreenMovement(movement)
    if &wrap
        return "g" . a:movement
    else
        return a:movement
    endif
endfunction

onoremap <silent> <expr> j ScreenMovement("j")
onoremap <silent> <expr> k ScreenMovement("k")
onoremap <silent> <expr> 0 ScreenMovement("0")
onoremap <silent> <expr> ^ ScreenMovement("^")
onoremap <silent> <expr> $ ScreenMovement("$")
nnoremap <silent> <expr> j ScreenMovement("j")
nnoremap <silent> <expr> k ScreenMovement("k")
nnoremap <silent> <expr> 0 ScreenMovement("0")
nnoremap <silent> <expr> ^ ScreenMovement("^")