`nvim` settings

init.vim

" grindarius's Neovim settings
" Please install vim-plug, node (using nvm), python (using pyenv), and rust
" (using rustup) first.
"
" Then run
" ```
" :PlugInstall 
" ```
" 
" Then install coc-tsserver, coc-rust-analyzer, coc-eslint, coc-pyright,
" coc-json.
"
" Then install rust, typescript, javascript, python for treesitter using
" :TSInstall
" 
" Install neovim npm package, pynvim pip, pythonx pip, java (using openjdk)
" and you should be good to go
:set number
:set relativenumber
:set autoindent
:set tabstop=4
:set shiftwidth=4
:set smarttab
:set softtabstop=4
:set mouse=a
:set expandtab
:set exrc
:set secure

" terminal mode remap to go to normal mode by pressing Esc key
:tnoremap <Esc> <C-\><C-n>

" toggle line wrap using Alt + Z
function! ToggleWrap()
    if (&wrap == 1)
        set nowrap
    else
        set wrap
    endif
endfunction

map <silent> <A-z> :call ToggleWrap()<CR>

" set line at 100 characters
set colorcolumn=100
highlight ColorColumn ctermbg=0 guibg=purple

call plug#begin(stdpath('data') . '/plugged')

Plug 'https://github.com/catppuccin/nvim', {'as': 'catppuccin'}
Plug 'https://github.com/NLKNguyen/papercolor-theme'
Plug 'https://github.com/tpope/vim-surround'
Plug 'https://github.com/wakatime/vim-wakatime'
Plug 'https://github.com/jiangmiao/auto-pairs'
Plug 'https://github.com/nvim-lualine/lualine.nvim'
Plug 'https://github.com/shmup/vim-sql-syntax'
Plug 'https://github.com/nvim-treesitter/nvim-treesitter', { 'do': ':TSUpdate' }
Plug 'https://github.com/kyazdani42/nvim-web-devicons'
Plug 'https://github.com/kyazdani42/nvim-tree.lua'
Plug 'https://github.com/neoclide/coc.nvim', { 'branch': 'release' }

call plug#end()

" TextEdit might fail if hidden is not set.
set hidden

" Some servers have issues with backup files, see #649.
set nobackup
set nowritebackup

" Give more space for displaying messages.
set cmdheight=2

" Having longer updatetime (default is 4000 ms = 4 s) leads to noticeable
" delays and poor user experience.
set updatetime=300

" Don't pass messages to |ins-completion-menu|.
set shortmess+=c

" Always show the signcolumn, otherwise it would shift the text each time
" diagnostics appear/become resolved.
if has('nvim-0.5.0') || has('patch-8.1.1564')
    " Recently vim can merge signcolumn and number column into one
    set signcolumn=number
else
    set signcolumn=yes
endif

" Use tab for trigger completion with characters ahead and navigate.
" NOTE: Use command ':verbose imap <tab>' to make sure tab is not mapped by
" other plugin before putting this into your config.
inoremap <silent><expr> <TAB>
    \ pumvisible() ? '\<C-n>' :
    \ CheckBackspace() ? '\<TAB>' :
    \ coc#refresh()
inoremap <expr><S-TAB> pumvisible() ? '\<C-p>' : '\<C-h>'

function! CheckBackspace() abort
    let col = col('.') - 1
    return !col || getline('.')[col - 1]  =~# '\s'
endfunction

" Use <c-space> to trigger completion.
if has('nvim')
    inoremap <silent><expr> <c-space> coc#refresh()
else
    inoremap <silent><expr> <c-@> coc#refresh()
endif

" Make <CR> auto-select the first completion item and notify coc.nvim to
" format on enter, <cr> could be remapped by other vim plugin
inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

" Use `[g` and `]g` to navigate diagnostics
" Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
nmap <silent> [g <Plug>(coc-diagnostic-prev)
nmap <silent> ]g <Plug>(coc-diagnostic-next)

" GoTo code navigation.
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 ShowDocumentation()<CR>

function! ShowDocumentation()
    if CocAction('hasProvider', 'hover')
        call CocActionAsync('doHover')
    else
        call feedkeys('K', 'in')
    endif
endfunction

" Highlight the symbol and its references when holding the cursor.
autocmd CursorHold * silent call CocActionAsync('highlight')

" Symbol renaming.
nmap <leader>rn <Plug>(coc-rename)

" Formatting selected code.
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

" Applying codeAction to the selected region.
" Example: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap keys for applying codeAction to the current buffer.
nmap <leader>ac  <Plug>(coc-codeaction)
" Apply AutoFix to problem on the current line.
nmap <leader>qf  <Plug>(coc-fix-current)

" Run the Code Lens action on the current line.
nmap <leader>cl  <Plug>(coc-codelens-action)

" Map function and class text objects
" NOTE: Requires 'textDocument.documentSymbol' support from the language server.
xmap if <Plug>(coc-funcobj-i)
omap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap af <Plug>(coc-funcobj-a)
xmap ic <Plug>(coc-classobj-i)
omap ic <Plug>(coc-classobj-i)
xmap ac <Plug>(coc-classobj-a)
omap ac <Plug>(coc-classobj-a)

" Remap <C-f> and <C-b> for scroll float windows/popups.
if has('nvim-0.4.0') || has('patch-8.2.0750')
    nnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : '\<C-f>'
    nnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : '\<C-b>'
    inoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? '\<c-r>=coc#float#scroll(1)\<cr>' : '\<Right>'
    inoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? '\<c-r>=coc#float#scroll(0)\<cr>' : '\<Left>'
    vnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : '\<C-f>'
    vnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : '\<C-b>'
endif

" Use CTRL-S for selections ranges.
" Requires 'textDocument/selectionRange' support of language server.
nmap <silent> <C-s> <Plug>(coc-range-select)
xmap <silent> <C-s> <Plug>(coc-range-select)

" Add `:Format` command to format current buffer.
command! -nargs=0 Format :call CocActionAsync('format')

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

" Add `:OR` command for organize imports of the current buffer.
command! -nargs=0 OR   :call     CocActionAsync('runCommand', 'editor.action.organizeImport')

" Add (Neo)Vim's native statusline support.
" NOTE: Please see `:h coc-status` for integrations with external plugins that
" provide custom statusline: lightline.vim, vim-airline.
set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}

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

" NvimTree commands
:set nosplitright

lua require'nvim-web-devicons'.setup {}
lua require'nvim-tree'.setup { view = { side = 'right' } }

nnoremap <C-b> :NvimTreeToggle<CR>
nnoremap <leader>r :NvimTreeRefresh<CR>
nnoremap <leader>n :NvimTreeFindFile<CR>

set termguicolors " this variable must be enabled for colors to be applied properly

" a list of groups can be found at `:help nvim_tree_highlight`
highlight NvimTreeFolderIcon guibg=blue

" paperclip theme settings
" set background=dark
" colorscheme PaperColor

" catppuccin theme settings
lua << EOF
local catppuccin = require('catppuccin')

catppuccin.setup({
    styles = {
        comments = 'NONE',
        conditionals = 'NONE'
    },
    integrations = {
        native_lsp = {
            virtual_text = {
                errors = 'NONE',
                hints = 'NONE',
                warnings = 'NONE',
                information = 'NONE'
            }
        },
        coc_nvim = true,
    }
})
EOF

let g:catppuccin_flavour = 'mocha'
colorscheme catppuccin

" lualine settings 
lua require('lualine').setup({ options = { themes = 'codedark' } })

" additional nvim treesitter settings
lua <<EOF
require('nvim-treesitter.configs').setup({
    ensure_installed = {
        'c', 'python', 'rust', 'javascript', 'vue', 'typescript', 'cpp', 'vim', 'yaml'
    },
    sync_install = false,
    highlight = {
        enable = true
    }
})
EOF