.vimrc

" Vim config by github.com/another-dark-knight


call plug#begin('~/.vim/plugged')

Plug 'scrooloose/nerdtree'
Plug 'junegunn/fzf', { 'do': './install --bin' }
Plug 'junegunn/fzf.vim'
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'tiagofumo/vim-nerdtree-syntax-highlight'
Plug 'ryanoasis/vim-devicons'
Plug 'airblade/vim-gitgutter'
Plug 'preservim/nerdcommenter'
Plug 'christoomey/vim-tmux-navigator'
Plug 'morhetz/gruvbox'
Plug 'vim-airline/vim-airline'
Plug 'prettier/vim-prettier', { 'do': 'yarn install' }
" Plug 'HerringtonDarkholme/yats.vim' "for typescript
Plug 'Xuyuanp/nerdtree-git-plugin'
Plug 'tiagofumo/vim-nerdtree-syntax-highlight'
"Plug 'vim-latex/vim-latex'
Plug 'lervag/vimtex'
Plug 'xuhdev/vim-latex-live-preview', {'for': 'tex' }
call plug#end()

" Parameters mostly boring(not so boring) stuff
set number
nmap <M-r> :set relativenumber<CR>
nmap <M-a> :set norelativenumber<CR>
nmap <M-l> :source ~/.vimrc<CR> 
set nocompatible
syntax on
set hidden
set cmdheight=2
set showmatch
set updatetime=300
set shortmess+=c
set termwinsize=10x0
set signcolumn=yes
" the C++ server was slow with backups
set nobackup
set nowritebackup
set tabstop=4 softtabstop=4 shiftwidth=4 expandtab
" Looks
colorscheme gruvbox
set bg=dark
" Alt key/ meta key problem Alt+x gives ^[x
" uncomment if this is not the case
for i in range(97,122)
    let c = nr2char(i)
    exec "map \e".c." <M-".c.">"
    exec "map! \e".c." <M-".c.">"
endfor

inoremap jk <Esc>
nmap <M-t> :below terminal<CR>
"NERDTree

nmap <M-n> :NERDTreeToggle<CR>
nmap <C-t> :NERDTreeRefreshRoot<CR>
let g:NERDTreeGitStatusWithFlags = 1


function! IsNERDTreeOpen()        
  return exists("t:NERDTreeBufName") && (bufwinnr(t:NERDTreeBufName) != -1)
endfunction
" Call NERDTreeFind iff NERDTree is active, current window contains a
" modifiable file, and we're not in vimdiff
function! CheckTree()
   if &modifiable && IsNERDTreeOpen() && strlen(expand('%')) > 0 && !&diff
       NERDTreeFind
       wincmd p
   endif
endfunction

" open NERDTree automatically
autocmd StdinReadPre * let s:std_in=1
"autocmd VimEnter * NERDTree | wincmd p
autocmd BufEnter * call CheckTree()

"
" NERDCommenter
" Add spaces after comment delimiters by default
let g:NERDSpaceDelims = 1
" Use compact syntax for prettified multi-line comments
let g:NERDCompactSexyComs = 1
" Align line-wise comment delimiters flush left instead of following code indentation
let g:NERDDefaultAlign = 'left'
" Set a language to use its alternate delimiters by default
let g:NERDAltDelims_java = 1
" Add your own custom formats or override the defaults
let g:NERDCustomDelimiters = { 'c': { 'left': '/**','right': '*/' } }
" Allow commenting and inverting empty lines (useful when commenting a region)
let g:NERDCommentEmptyLines = 1
" Enable trimming of trailing whitespace when uncommenting
let g:NERDTrimTrailingWhitespace = 1
" Enable NERDCommenterToggle to check all selected lines is commented or not 
let g:NERDToggleCheckAllLines = 1
let g:NERDCreateDefaultMappings = 0
" Prettier
nmap <C-M-i> Prettier<CR>

"COC
inoremap <silent><expr> <C-space> coc#refresh()

" Use <cr> to confirm completion, `<C-g>u` means break undo chain at current position.
 "Coc only does snippet and additional edit on confirm.
"inoremap <expr> <cr> pumvisible() ? \"C-y><" : "\C-g><u\<CR>"

" Tab completions tab by mapping <tab> 
inoremap <silent><expr> <TAB>
      \ pumvisible() ? "\<C-n>" :
      \ <SID>check_back_space() ? "\<TAB>" :
      \ coc#refresh()
inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"
" I got errors on pressing tab immediately after a backspace so i got this bit
" online
function! s:check_back_space() abort
     let col = col('.') - 1
     return !col || getline('.')[col - 1]  =~# '\s'
endfunction

" Use `[g` and `]g` to navigate diagnostics
nmap <silent> [g <Plug>(coc-diagnostic-prev)
nmap <silent> ]g <Plug>(coc-diagnostic-next)

" Remap keys for gotos
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gi <Plug>(coc-implementation)
nmap <silent> gr <Plug>(coc-references)

" Use K to show documentation in preview window
nnoremap <silent> K :call <SID>show_documentation()<CR>

function! s:show_documentation()
  if (index(['vim','help'], &filetype) >= 0)
    execute 'h '.expand('<cword>')
  else
    call CocAction('doHover')
  endif
endfunction

" Highlight symbol under cursor on CursorHold
autocmd CursorHold * silent call CocActionAsync('highlight')

" Remap for rename current word
nmap <C-r> <Plug>(coc-rename)

xmap <leader>f  <Plug>(coc-format-selected)
nmap <leader>f  <Plug>(coc-format-selected)

augroup mygroup
  autocmd!
  " Setup formatexpr specified filetype(s).
  autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
  " Update signature help on jump placeholder
  autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
augroup end


" Remap for do codeAction of selected region, ex: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap for do codeAction of current line
nmap <leader>ac  <Plug>(coc-codeaction)
" Fix autofix problem of current line
nmap <leader>qf  <Plug>(coc-fix-current)

" Create mappings for function text object, requires document symbols feature of languageserver.
xmap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap if <Plug>(coc-funcobj-i)
omap af <Plug>(coc-funcobj-a)

" Use <C-d> for select selections ranges, needs server support, like: coc-tsserver, coc-python
nmap <silent> <C-d> <Plug>(coc-range-select)
xmap <silent> <C-d> <Plug>(coc-range-select)

" Use `:Format` to format current buffer
command! -nargs=0 Format :call CocAction('format')

" Use `:Fold` to fold current buffer
command! -nargs=? Fold :call     CocAction('fold', <f-args>)

" use `:OR` for organize import of current buffer
command! -nargs=0 OR   :call     CocAction('runCommand', 'editor.action.organizeImport')

" Add status line support, for integration with other plugin, checkout `:h coc-status`
set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}

" Using CocList
" Show all diagnostics
nnoremap <silent> <space>a  :<C-u>CocList diagnostics<cr>
" Manage extensions
nnoremap <silent> <space>e  :<C-u>CocList extensions<cr>
" Show commands
nnoremap <silent> <space>c  :<C-u>CocList commands<cr>
" Find symbol of current document
nnoremap <silent> <space>o  :<C-u>CocList outline<cr>
" Search workspace symbols
nnoremap <silent> <space>s  :<C-u>CocList -I symbols<cr>
" Do default action for next item.
nnoremap <silent> <space>j  :<C-u>CocNext<CR>
" Do default action for previous item.
nnoremap <silent> <space>k  :<C-u>CocPrev<CR>
" Resume latest coc list
nnoremap <silent> <space>p  :<C-u>CocListResume<CR>

"C++
nmap <M-e> :!cmake -H. -BDebug -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=YES && ln -s Debug/compile_commands.json<CR>:CocRestart<CR><CR>:NERDTreeRefreshRoot<CR>
nmap <M-b> :!cmake -H. -Bbuild<CR>:NERDTreeRefreshRoot<CR>
nmap <C-C> :!rm -rf Debug compile_commands.json<CR>:CocRestart<CR><CR>:NERDTreeRefreshRoot<CR>
nmap <M-y> :CocRestart<CR><CR>