" NeoVim init.vim
" 
" Differences with good ol' Vim:
"
" NeoVim has so many of the modern and helpful Vim options on by default.  I'll
" remove most of the old Vim configurations that now come by default in NeoVim.
"
" Also NeoVim uses XDG directories by default, keeping a clean directory tree.
"
" NeoVim also allows for this file to be written in Lua.  I'll stick to using
" Vim script becuase it has more documentation and is more concise configuring
" Vim options.
"
" Instead of viminfo, NeoVim uses shada files (SHared DAta) (different format).
" See shada-file-name.
"
" For some reason, as of version v0.8.3 of NeoVim, Vim internal codes for shift-
" and control- function keys change in NeoVim.  <S-F1> changes to <F13>, and
" <C-F1> changes to <F25>. See https://github.com/neovim/neovim/issues/7384
"
" Plugins:  There are a lot of ways to install "plug-in"s in Vim.  My prefered
" way is using Vim packages, available since Vim version 8.  See packages.
" 
" Tips:
" * To show navigate help files:
"       K       " while on an option to see it's documentation
"       CTRL-]  " navigation while on a Vim help file
" * To re-indent:
"       tab->spaces     :set tabstop=n      :set expandtab  :retab
"       spaces->tab     :set noexpandtab    :set tabstop={softtabstop}  :retab!
" * To justify:
"       To 'justify' comments or block of text (paragraph) use `gq{motion}` or
"       `gp{motion}`, where {motion} can be `[/`, `]/`, `ip`, `i{`, `a{`.
" * To see the last page of previous command:
"       `g<`
" * Buffer stuff:
"       :ls         " shows all buffers
"       :b N        " Go to buffer N (integer)


" Settings
" ----------------------------------------------------------------------

colorscheme industry

" Command line:
set cmdheight=1
set wildmenu
set wildignore+=*.o,.git,*.class
set path+=./**30    " For gf and :find, add all subdirectories relative to
                    " current file (30 max) to the "search space"

" Search
set ignorecase
set smartcase

" Screen
set nonumber
set scrolloff=5     " show a few lines of context
set colorcolumn=+1  " show ruler at position tabstop+1
set laststatus=2
" Add buffer number to the default status line with ruler
set statusline=%<%f\ %h%m%r%=b%02n\ \ %-14.(%l,%c%V%)\ %P

" TODO: move to ftplugin
" TODO: create tags automatically (:!ctags -R . after :w if ft=c)
" Tag Jumping
" Instructions: create tag index (e.g. $ ctags -R .)
"               place cursor on tag
"               ^]  to jump to definition
"               g^] if more than 1 definition
"               ^T  to return (or ^O)

"set cindent            
"set cinoptions=:0,g0   " See C-indenting


" Indentation: 4 spaces
" See also: autoindent, smartindent, cindent, indentexpr 
set tabstop=4           " Each '\t' takes 8 virtual (screen) columns
set shiftwidth=0        " (Auto)indentation.  Also affects: >>, i_C-T, i_C-D
set expandtab           " Expand inserted <Tab>s with <Space>
set smartindent         " Smart indenting when starting a new line

" Formatting: See fo-table
set formatoptions+=t        " auto-wrap text (when inserting)
set formatoptions+=c        " auto-wrap comments (when inserting)
set formatoptions+=q        " Allow formatting of comments with "gq"
set formatoptions+=j        " Removes comment leader when joining lines
set formatoptions+=l        " Don't break long lines that are already typed
set formatoptions+=r        " Insert current leader after <Enter> in Insert mode
set formatoptions+=p        " Don't break honorifics like Prof. Smith
set formatoptions+=n        " Recognize numbered lists
set formatoptions+=o        " Automatically insert the current comment
                            " leader after `o`.

" Wrap: Auto-break lines longer than 80 colums
set textwidth=80    
set wrap
set linebreak       " Don't break words

" Mouse
set mouse=a         " Enable mouse for all modes

" Buffers
set hidden          " Allow for hidden modified buffers


" Mappings
" ----------------------------------------------------------------------

let $VIMFILES = split(&rtp, ",")[0]

map <F5> :source $VIMFILES/init.vim<CR>
map <F17> :e $VIMFILES/init.vim<CR>

map <F7> :tabp<CR>
map <F8> :tabn<CR>
map <F19> :bNext<LF>
map <F20> :bnext<LF>

" TODO: move to ftplugin
" C/C++ Programming:
map <F6> :w<CR>:!clear && make<CR>
"map <F10> :!./%:r<CR>
"map <F10> :!./a.out<CR>
map <F11> :cnext<CR>
map <S-F11> :cprev<CR>
" "Run cTags"
map <Leader>rt :!ctags -R .<CR>
map <C-\> :tnext<CR>
" Motion to go to beggining of function while cursor is inside
nmap [f [m[{k0

" pandoc (& website):
nnoremap mm :w<CR>:Md2Html<CR><CR><CR>
nmap mM mm:!updatewebsite_zaz<CR><CR>

" asciidoc:
nnoremap ma :w<CR>:!asciidoctor %<CR><CR>
nmap mA ma:!updatewebsite_zaz<CR><CR>

" Funcionallity of the following depends on terminal emulator.  Needs 8-bit
" input enabled
" for  <Meta> = Alt  key combos
" From: https://vim.fandom.com/wiki/Get_Alt_key_to_work_in_terminal
nmap <M-H> <C-W>h
nmap <M-J> <C-W>j
nmap <M-K> <C-W>k
nmap <M-L> <C-W>l

" Go Title Case (and clear highlighted matches)
" Ref.: https://vim.fandom.com
vmap gt :s/\<\(\w\)\(\w*\)\>/\u\1\L\2/g<CR><C-L>

" Autoformat JSON jumbled data
" Ref.: https://stackoverflow.com/questions/26214156/how-to-auto-format-json-on-save-in-vim
nnoremap gJ :%!python3 -m json.tool<CR>

" Replaces previous WORD arithmetic expression with result (from Vim
" fandom-wiki)
inoremap <C-A> <Esc>diWi<C-R>=<C-R>"<CR>


" Views and Sessions (Window layout and Line folding)
" ----------------------------------------------------------------------
" It is possible to create folds automatically but idk how to do it.
" :mkview so save them :loadview to load them (zo open one, zc close one,
" zR to open all, zM to close all, zx to restore))

" Views saves folds.  Sessions saves all windows configuration and layout
" Load Sessions with $ vim -S Session.vim

" To automatically save and restore views for *.c *.cpp files: 
au BufWinLeave *.c mkview
au BufWinEnter *.c silent loadview
au BufWinLeave *.cpp mkview
au BufWinEnter *.cpp silent loadview