vimrc

" .vimrc
" See: http://vimdoc.sourceforge.net/htmldoc/options.html for details

" Run vundle first to load vim plugins
source ~/.vim/vundle.vim
" Required to make vundle work
filetype plugin on
filetype indent on


" shows status line with filename, column/row coords, dirty bit
:set laststatus=2
" provide two lines for status messages at the bottom of the screen
:set cmdheight=2
" shows the line/column information for the current location of the cursor
:set ruler
" sets xterm title to display the name of the file currently being edited
:set title
" shows mode (i.e. insert mode etc)
:set showmode
" shows the keystrokes currently waiting to be processed
:set showcmd
" always reports the number of lines changed
:set report=0
" flashes the screen instead of beeping the computer
":set visualbell
" Show hybrid line numbers
:set relativenumber
:set number

" searches are incremental
:set incsearch
" show matching bracket briefly
:set showmatch
" highlight all search pattern matches
:set hlsearch
" searches are case insensitive unless they contain uppercase letters
" must have ignorecase set too
:set ignorecase
:set smartcase

" show long lines as they are
:set nowrap
" character to mark lines that exceed 80 characters
":set listchars+=extends:@

" indent on new line is equal to indent on previous line
:set autoindent
" tabstops set to 4 space
:set tabstop=2
:set softtabstop=2
" tabstops are converted to spaces, ensuring the file always looks the same.
":set expandtab
" width of an indent level
:set shiftwidth=4
" round indents off to shiftwidth
":set shiftround

" maximum allowable line length
" :set textwidth=99
" autoformats text, wraps lines, autoindents, continues comments etc.
:set formatoptions=r,o,q,w,n,l ",a,c,t
" allows backspace to work across lines and before the start of insert.
:set backspace=indent,eol,start
" Copy indent from current line when starting a new line
":set autoindent
":set smartindent 

" Allow copy to system clipboard
set clipboard=unnamed

" syntax colouration and highlighting
:syntax on

" filetype specific commands.
:filetype on
:autocmd FileType make :set noexpandtab
:autocmd FileType c :set cindent
":autocmd FileType python

" these are abbreviations for convenience.
:iab #i #include
:iab #d #define
:iab perr fprintf(stderr,"%s:%d:\n",__FILE__,__LINE__);

" write a backup of the current file (with an appended ~) on each write
":set backup

" tab autocompletion in the command space
:set wildchar=<TAB>
:set wildmenu
:set wildmode=longest,full
" Enable the use of the mouse.
:set mouse=a

" Try to use colors that look good on a dark background.
set t_Co=256
"let g:solarized_termtrans = 1
set background=dark
"colorscheme zenburn
" This lets spellcheck highlighting in gruvbox work
let g:gruvbox_guisp_fallback = "bg"
colorscheme gruvbox
"highlight comment ctermfg=darkgreen

" Prevent autoindent from messing up tabbing when pasting from clipboard
if &term =~ "xterm"
		let &t_SI .= "\e[?2004h"
		let &t_EI .= "\e[?2004l"
		let &pastetoggle = "\e[201~"

		function XTermPasteBegin(ret)
				set paste
				return a:ret
		endfunction

		inoremap <special> <expr> <Esc>[200~ XTermPasteBegin("")
endif

" A nicer way to move to the middle of the current line
:nnoremap gm :call cursor(0, virtcol('$')/2)<CR><C-g>

" Clear search highlights when control-g is pushed
:nnoremap <C-g> :noh<CR><C-g>

" Formatting for git commit messages
autocmd Filetype gitcommit setlocal spell textwidth=72
" Spell check for Markdown files
autocmd BufRead,BufNewFile *.md setlocal spell

" Jump to last cursor position when opening a file
if has("autocmd")
		au BufReadPost * if line("'\"") > 0 && line("'\"") <= line("$")
								\| exe "normal! g'\"" | endif
endif

" Use an undo file to record change history
:set undofile
" Tell vim where undo files are
:set undodir=.vim/vimundo/

"""" PYTHON Configs """"
" PEP8 conforming indents
au BufNewFile,BufRead *.py,*.pyw
						\ set tabstop=4 |
						\ set softtabstop=4 |
						\ set shiftwidth=4 |
						\ set textwidth=79 |
						\ set expandtab |
						\ set autoindent |
						\ set fileformat=unix |
						\ set encoding=utf-8

" Shell scripting
au BufNewFile,BufRead *.sh
						\ set tabstop=4 |
						\ set softtabstop=4 |
						\ set shiftwidth=4 |
						\ set textwidth=79 |
						\ set expandtab |
						\ set autoindent |
						\ set fileformat=unix |
						\ set encoding=utf-8

" Latex scripting
au BufNewFile,BufRead *.tex,*.bib
						\ set tabstop=4 |
						\ set softtabstop=4 |
						\ set shiftwidth=4 |
						\ set textwidth=79 |
						\ set expandtab |
						\ set autoindent |
						\ set fileformat=unix |
						\ set encoding=utf-8

" Go, yaml, markdown, html scripting
au BufNewFile,BufRead *.go,*.md,*.markdown,*.yaml,*.yml,*.html,*.scss
						\ set tabstop=2 |
						\ set softtabstop=2 |
						\ set shiftwidth=2 |
						\ set textwidth=79 |
						\ set expandtab |
						\ set autoindent |
						\ set fileformat=unix |
						\ set encoding=utf-8

" Number of spaces that a pre-existing tab is equal to.
" For the amount of space used for a new tab use shiftwidth.
"au BufRead,BufNewFile *py,*pyw,*.c,*.h set tabstop=4
au BufRead,BufNewFile *.c,*.h set tabstop=4

" What to use for an indent.
" This will affect Ctrl-T and 'autoindent'.
" Python: 4 spaces
" C: tabs (pre-existing files) or 4 spaces (new files)
"au BufRead,BufNewFile *.py,*pyw set shiftwidth=4
"au BufRead,BufNewFile *.py,*.pyw set expandtab
fu Select_c_style()
		if search('^\t', 'n', 150)
				set shiftwidth=2
				set noexpandtab
		el 
				set shiftwidth=2
				set expandtab
		en
endf
au BufRead,BufNewFile *.c,*.h call Select_c_style()
au BufRead,BufNewFile Makefile* set noexpandtab

" Use the below highlight group when displaying bad whitespace is desired.
highlight BadWhitespace ctermbg=red guibg=red

" Display tabs at the beginning of a line in Python mode as bad.
au BufRead,BufNewFile *.py,*.pyw match BadWhitespace /^\t\+/
" Make trailing whitespace be flagged as bad.
au BufRead,BufNewFile *.py,*.pyw,*.c,*.h match BadWhitespace /\s\+$/

" Turn off settings in 'formatoptions' relating to comment formatting.
" - c : do not automatically insert the comment leader when wrapping based on
"    'textwidth'
" - o : do not insert the comment leader when using 'o' or 'O' from command mode
" - r : do not insert the comment leader when hitting <Enter> in insert mode
" Python: not needed
" C: prevents insertion of '*' at the beginning of every line in a comment
au BufRead,BufNewFile *.c,*.h set formatoptions-=c formatoptions-=o formatoptions-=r

" For full syntax highlighting:
let python_highlight_all=1
syntax on

" Vimtex mappings
" Actually want this to map to <m-i> but can't get it to work
 call vimtex#imaps#add_map({
        \ 'lhs' : '`i',
        \ 'rhs' : '',
        \ 'leader'  : '',
        \ 'wrapper' : 'vimtex#imaps#wrap_environment',
        \ 'context' : [
        \   {'envs' : ['itemize', 'enumerate'],
        \    'rhs' : '\item '},
        \   {'envs' : ['description'],
        \    'rhs' : '\item['},
        \ ],
        \})