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" Tom Ryder (tejr)'s vimrc: <https://sanctum.geek.nz/cgit/dotfiles.git>
"
" This file is not truly self-contained. It should run without errors on its
" own without the accompanying plugins to which it refers near its end, but
" you'll get errors for some of the leader maps.

" Undo anything the operating system's vimrc may have broken
runtime system.vim

" Load filetype settings, plugins, and maps
if has('autocmd')
  let g:maplocalleader = ','
  filetype plugin indent on
endif

" Options dependent on the syntax feature
if has('syntax')

  " Use syntax highlighting
  if !exists('g:syntax_on')
    syntax enable
  endif

  " Use my colorscheme if using the GUI or if we have 256 colors
  if has('gui_running') || &t_Co >= 256
    silent! colorscheme sahara
  endif

  " If not sahara, then default with dark background
  if !exists('g:colors_name')
    set background=dark
  endif

endif

" The all-important default indent settings; filetypes to tweak
set autoindent    " Use indent of previous line on new lines
set expandtab     " Use spaces instead of tabs
set shiftwidth=4  " Indent with four spaces

" Spaces to insert on Tab key insert
if v:version > 703 || v:version == 703 && has('patch693')
  set softtabstop=-1  " Refer to 'shiftwidth' if supported
else
  set softtabstop=4   " Otherwise just four spaces
endif

" Let me backspace over pretty much anything
set backspace+=eol     " Line breaks
set backspace+=indent  " Spaces from 'autoindent'
set backspace+=start   " The start of current insertion

" How to deal with lines wrapping beyond the last screen row
if v:version > 704 || v:version == 704 && has('patch2109')
  set display=truncate  " Show '@@@' on the last line, if supported
else
  set display=lastline  " Just let it run off the screen if not
endif

" Don't wait for a key after Escape in insert mode
if exists('+esckeys')  " Not in Neovim
  set noesckeys
endif

" Delete comment leaders when joining lines, if supported
if v:version > 703 || v:version == 703 && has('patch541')
  set formatoptions+=j
endif

" Keep more command and search history
set history=500

" Don't assume I'm editing C; let the filetype set this
set include=

" Don't join lines with two spaces at the end of sentences
set nojoinspaces

" Don't show a statusline if there's only one window
if has('nvim')  " Neovim changed the default to 2
  set laststatus=1
endif

" Don't redraw the screen during batch execution
set lazyredraw

" Define extra 'list' display characters
set listchars+=extends:>   " Unwrapped text to screen right
set listchars+=precedes:<  " Unwrapped text to screen left
set listchars+=tab:>-      " Tab characters, preserve width
set listchars+=trail:_     " Trailing spaces
if v:version >= 700
  set listchars+=nbsp:+    " Non-breaking spaces
endif

" Don't allow setting options via buffer content
set nomodeline

" Treat numbers with a leading zero as decimal, not octal
set nrformats-=octal

" Don't show startup splash screen (I donated)
set shortmess+=I

" Give me a bit longer to complete mappings
set timeoutlen=3000

" Clear default 'comments' value, let the filetype handle it
if has('comments')
  set comments=
endif

" Highlight settings for search
if has('extra_search')
  set hlsearch   " Highlight completed searches...
  nohlsearch     " ...but clear it on startup or after re-sourcing
  set incsearch  " Show matches as I type
endif

" More sensible language-agnostic setting for gf/:find
if has('file_in_path')
  set path=.,,**
endif

" Don't load GUI menus; set here before GUI starts
if has('gui_running')
  set guioptions+=M
endif

" Line break behaviour settings for 'wrap'
if has('linebreak')
  set linebreak      " Break lines at word boundaries
  set showbreak=...  " Prefix wrapped rows with three dots
  if exists('+breakindent')
    set breakindent  " Indent wrapped lines, if supported
  endif
endif

" Don't store any options or mappings in sessions
if has('mksession')
  set sessionoptions-=localoptions
  set sessionoptions-=options
endif

" Let me move beyond buffer text in visual block mode
if has('virtualedit')
  set virtualedit+=block
endif

" Nicer completion for command mode
if has('wildmenu')
  set wildmenu               " Use wildmenu
  set wildmode=list:longest  " Tab press completes and lists
  if exists('+wildignorecase')
    set wildignorecase       " Case insensitive, if supported
  endif
  " 'wildignore' is built in plugin/wildignore.vim
endif

" New windows go below or to the right of a split
if has('windows')
  set splitbelow
  if has('vertsplit')
    set splitright
  endif
endif

" Stack normal/visual/select Ctrl-L to clear search highlight
nnoremap <silent> <C-L> :<C-U>nohlsearch<CR><C-L>
vnoremap <silent> <C-L> :<C-U>nohlsearch<CR>gv<C-L>

" Remap insert Ctrl-C to undo the escaped insert operation
imap <C-C> <Plug>(InsertCancel)

" Map double Ctrl-K in insert mode to search digraph names
imap <C-K><C-K> <Plug>(DigraphSearch)

" Remap normal space to scroll down a page, backspace up a page
nnoremap <Space> <C-F>
nnoremap <BS> <C-B>

" Remap normal/visual & to preserve substitution flags
nnoremap <silent> & :&&<CR>
if v:version >= 700
  xnoremap <silent> & :&&<CR>
endif

" Cycle through argument list
nnoremap [a :<C-U>previous<CR>
nnoremap ]a :<C-U>next<CR>
" Cycle through buffers
nnoremap [b :<C-U>bprevious<CR>
nnoremap ]b :<C-U>bnext<CR>
" Cycle through quicklist/:helpgrep items
nnoremap [c :<C-U>cprevious<CR>
nnoremap ]c :<C-U>cnext<CR>
" Cycle through location list items
nnoremap [l :<C-U>lprevious<CR>
nnoremap ]l :<C-U>lnext<CR>
" Cycle through tabs
nnoremap [t :<C-U>tabprevious<CR>
nnoremap ]t :<C-U>tabnext<CR>

" Insert blank lines around current line
nmap [<Space> <Plug>(PutBlankLinesAbove)
nmap ]<Space> <Plug>(PutBlankLinesBelow)

" Normal leader maps; use <Bslash> not <Leader> for vim-tiny

" \a toggles 'formatoptions' 'a' flag using a plugin
nnoremap <Bslash>a :<C-U>ToggleOptionFlagLocal formatoptions a<CR>
" \b toggles copy-pasteable linebreak settings
nmap <Bslash>b <Plug>(CopyLinebreakToggle)
" \c toggles 'cursorline'
nnoremap <Bslash>c :<C-U>setlocal cursorline! cursorline?<CR>
" \C toggles 'cursorcolumn'
nnoremap <Bslash>C :<C-U>setlocal cursorcolumn! cursorcolumn?<CR>
" \d inserts the local date (POSIX date)
nnoremap <Bslash>d :read !date<CR>
" \D inserts the UTC date (POSIX date)
nnoremap <Bslash>D :read !date -u<CR>
" \e forces a buffer to be editable
nnoremap <Bslash>e :setlocal modifiable noreadonly<CR>
" \f shows the current 'formatoptions' at a glance
nnoremap <Bslash>f :<C-U>setlocal formatoptions?<CR>
" \g changes directory to the current file's location
nnoremap <Bslash>g :<C-U>cd %:h<CR>:pwd<CR>
" \h toggles highlighting search results
nnoremap <Bslash>h :<C-U>set hlsearch! hlsearch?<CR>
" \i toggles showing matches as I enter my pattern
nnoremap <Bslash>i :<C-U>set incsearch! incsearch?<CR>
" \j jumps to buffers (jetpack)
nnoremap <Bslash>j :<C-U>buffers<CR>:buffer<Space>
" \k shows my marks
nnoremap <Bslash>k :<C-U>marks<CR>
" \l toggles showing tab, end-of-line, and trailing whitespace
nnoremap <Bslash>l :<C-U>setlocal list! list?<CR>
" \m shows all maps
nnoremap <Bslash>m :<C-U>map<CR>
" \M shows buffer-local maps
nnoremap <Bslash>M :<C-U>map <buffer><CR>
" \n toggles line numbers
nnoremap <Bslash>n :<C-U>setlocal number! number?<CR>
" \N toggles 'ruler'
nnoremap <Bslash>N :<C-U>set ruler! ruler?<CR>
" \o opens a line below in paste mode
nmap <Bslash>o <Plug>(PasteOpenBelow)
" \o opens a line above in paste mode
nmap <Bslash>O <Plug>(PasteOpenAbove)
" \p toggles paste mode
nnoremap <Bslash>p :<C-U>set paste! paste?<CR>
" \q formats the current paragraph
nnoremap <Bslash>q gqap
" \r reloads .vimrc
nnoremap <Bslash>r :<C-U>source $MYVIMRC<CR>
" \R reloads filetype
nnoremap <Bslash>R :<C-U>doautocmd filetypedetect BufRead<CR>
" \s toggles spell checking
nnoremap <Bslash>s :<C-U>setlocal spell! spell?<CR>
" \t shows current filetype
nnoremap <Bslash>t :<C-U>setlocal filetype?<CR>
" \T clears filetype (follow with \R)
nnoremap <Bslash>T :<C-U>setlocal filetype=<CR>
" \u sets US English spelling (compare \z)
nnoremap <Bslash>u :<C-U>setlocal spelllang=en_us<CR>
" \v shows all global variables
nnoremap <Bslash>v :<C-U>let g: v:<CR>
" \V shows all local variables
nnoremap <Bslash>V :<C-U>let b: t: w:<CR>
" \w toggles wrapping
nnoremap <Bslash>w :<C-U>setlocal wrap! wrap?<CR>
" \x strips trailing whitespace via a custom plugin
nmap <Bslash>x <Plug>(StripTrailingWhitespace)
" \y shows all registers
nnoremap <Bslash>y :<C-U>registers<CR>
" \z sets NZ English spelling (compare \u)
nnoremap <Bslash>z :<C-U>setlocal spelllang=en_nz<CR>

" \= runs the whole buffer through =, preserving position
nnoremap <Bslash>= :<C-U>call vimrc#Anchor('1G=G')<CR>
" \+ runs the whole buffer through gq, preserving position
nnoremap <Bslash>+ :<C-U>call vimrc#Anchor('1GgqG')<CR>
" \. runs the configured make program to location list
nnoremap <Bslash>. :<C-U>lmake!<CR>

" \DEL deletes the current buffer
nnoremap <Bslash><Delete> :<C-U>bdelete<CR>
" \INS edits a new buffer
nnoremap <Bslash><Insert> :<C-U>enew<CR>

" Source any .vim files from ~/.vim/config
runtime! config/*.vim