vimrc

" When started as "evim", evim.vim will already have done these settings, bail
" out.
if v:progname =~? "evim"
  finish
endif

" Get the defaults that most users want. (only applies to vim)
if !has('nvim')
    source $VIMRUNTIME/defaults.vim
endif

if has("vms")
  set nobackup        " do not keep a backup file, use versions instead
else
  set backup        " keep a backup file (restore to previous version)
  if has('persistent_undo')
    set undofile    " keep an undo file (undo changes after closing)
  endif
endif

if &t_Co > 2 || has("gui_running")
  " Switch on highlighting the last used search pattern.
  set hlsearch
endif

" Put these in an autocmd group, so that we can delete them easily.
augroup vimrcEx
  au!

  " For all text files set 'textwidth' to 78 characters.
  autocmd FileType text setlocal textwidth=78
augroup END

" Add optional packages.
"
" The matchit plugin makes the % command work better, but it is not backwards
" compatible.
" The ! means the package won't be loaded right away but when plugins are
" loaded during initialization.
if has('syntax') && has('eval')
  packadd! matchit
endif

" Plugin installation
call plug#begin()
    " coc.nvim installation for autocompletion, etc.
    Plug 'neoclide/coc.nvim', {'branch': 'release'}

    " vimwki plugin for note taking
    Plug 'vimwiki/vimwiki'

    " json completion
    Plug 'kevinoid/vim-jsonc'

    " php completion
    Plug 'StanAngeloff/php.vim'

    " filetree plugin
    Plug 'preservim/nerdtree'

    " rust support
    Plug 'rust-lang/rust.vim'

    " C# support
    Plug 'OmniSharp/omnisharp-vim'

    " gruvbox theme
    Plug 'morhetz/gruvbox'

    " Collection of common configurations for the Nvim LSP client
    Plug 'neovim/nvim-lspconfig'

    " Extensions to built-in LSP, for example, providing type inlay hints
    "Plug 'nvim-lua/lsp_extensions.nvim'
    " Autocompletion framework for built-in LSP
    "Plug 'nvim-lua/completion-nvim'

    " Completion framework
    Plug 'hrsh7th/nvim-cmp'

    " LSP completion source for nvim-cmp
    Plug 'hrsh7th/cmp-nvim-lsp'

    " Snippet completion source for nvim-cmp
    Plug 'hrsh7th/cmp-vsnip'

    " Other useful completion sources
    Plug 'hrsh7th/cmp-path'
    Plug 'hrsh7th/cmp-buffer'

    " To enable more of the features of rust-analyzer, such as inlay hints and more!
    Plug 'simrat39/rust-tools.nvim'

    " Snippet engine
    Plug 'hrsh7th/vim-vsnip'
call plug#end()

colorscheme gruvbox  " even nicer colorscheme!
"colorscheme desert  " nice colorscheme!
"colorscheme forest-night    " fallback colorscheme

set background=dark     " vim doesn't do this by default

if has('win32')
    set guifont=Consolas:h11:cANSI:qDRAFT
else
    set guifont=Source\ Code\ Variable\ Medium\ 11
endif


syntax enable        " enable syntax processing

" adding command to quickly open and edit my vimrc in a new tab
if has('win32')
    command EditRC split ~\vimfiles\vimrc
    " command Erc EditRC
else
    command EditRC split ~/.vim/vimrc
    " command Erc EditRC
endif

" changing leader key to make it easier to reach
let mapleader=","

" FORMATTING OPTIONS
set tabstop=4       " number of visual 'spaces' per tab character
set softtabstop=4   " number of spaces inserted by pressing tab character
set shiftwidth=4    " number of spaces inserted on new line after e.g. curly braces
set expandtab       " insert tab characters as spaces

set number rnu      " show hybrid line numbers (absolute num of current line, relative num of other lines)
set showcmd         " show command in bottom bar
set cursorline      " highlight current line

set breakindent     " wrapped/'broken' lines are indented to the same level as the start of the line
let &showbreak='   '    " sets the indentation of 'broken' lines to two whitespaces ahead of the start of the line
set linebreak       " doesn't break in the middle of words

filetype plugin on  " filetype-specific plugin use
filetype indent on  " filetype-specific indent style

let g:coc_disable_startup_warning = 1

" FINDING FILES

set path+=**    " search down into subfolders
set wildmenu    " display matching files on tab-completion

" TIDYING SWAP, BACKUP, UNDO AND VIMINFO FILES
if has('win32')
    set directory=~\vimfiles\.swp
    set backupdir=~\vimfiles\.bkp
    set undodir=~\vimfiles\.un
    if !has('nvim')
        set viminfo+=n$HOME\\vimfiles\\viminfo
    endif
else
    set directory=~/.vim/.swp/
    set backupdir=~/.vim/.bkp/
    set undodir=~/.vim/.un/
    if !has('nvim')
        set viminfo+=n~/.vim/viminfo
    endif
endif

" OPTIONS FOR `coc` PLUGIN
inoremap <silent><expr> <TAB>
    \ pumvisible() ? "\<C-n>" :
    \ <SID>check_back_space() ? "\<TAB>" :
    \ coc#refresh()
inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"

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

" use leader-n and leader-p to navigate diagnostics
nmap <silent> ,n <Plug>(coc-diagnostic-next)
nmap <silent> ,p <Plug>(coc-diagnostic-prev)

" 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)

" set highlighting for popup
highlight Pmenu guibg=SlateBlue ctermbg=DarkBlue


" OPTIONS FOR `vimwiki` PLUGIN

if has('win32')
    let g:vimwiki_list = [{'path': '~/Syncthing/Notes/vimwiki/',
            \ 'path_html': '~/Syncthing/Notes/vimwiki/html/',
            \ 'syntax': 'markdown', 'ext': '.md',
            \ 'custom_wiki2html': '%USERPROFILE%\Syncthing\Notes\vimwiki\misaka_md2html.py',
            \ 'auto_diary_index': 1 }]
else
    let g:vimwiki_list = [{'path': '~/Notes/vimwiki/',
            \ 'path_html': '~/Notes/vimwiki/html/',
            \ 'syntax': 'markdown', 'ext': '.md',
            \ 'auto_diary_index': 1 }]
endif

" Using a custom folding method, to not fold the last blank line before headers
let g:vimwiki_folding = 'custom'

function! VimwikiFoldLevelCustom(lnum)
  let pounds = strlen(matchstr(getline(a:lnum), '^#\+ '))
  if (pounds)
    return '>' . pounds  " start a fold level
  endif
  if getline(a:lnum) =~? '\v^\s*$'
    if (strlen(matchstr(getline(a:lnum + 1), '^#\+ ')))
      return '-1' " don't fold last blank line before header
    endif
  endif
  return '=' " return previous fold level
endfunction

augroup VimrcAuGroup
  autocmd!
  autocmd FileType vimwiki setlocal foldmethod=expr |
    \ setlocal foldenable | set foldexpr=VimwikiFoldLevelCustom(v:lnum)
augroup END


" Adding command to convert to html with pandoc
if has('win32')
    " For some reason, Neovim hangs when opening browser unless browser is already open
    " Can't figure out how to get around this, so I'll just have to remember
    " to manually open the browser each time I run this
    let browser='C:\Program Files\BraveSoftware\Brave-Browser\Application\brave.exe'
    command Pan let fn=expand('%:p:h').'\html\'.expand('%:t:r').'.html' | silent execute '!pandoc --standalone "%" -c pandoc.css -o "'.fn.'" && "'.browser.'" "'.fn.'"'
    command PanRefresh let fn=expand('%:p:h').'\html\'.expand('%:t:r').'.html' | silent execute '!pandoc --standalone "%" -c pandoc.css -o "'.fn.'"'
else
    command Pan let fn=expand('%:p:h').'/html/'.expand('%:t:r').'.html' | silent execute '!pandoc --standalone "%" -c ~/Notes/vimwiki/html/pandoc.css -o "'.fn.'" && xdg-open "'.fn.'" &'
    command PanRefresh let fn=expand('%:p:h').'/html/'.expand('%:t:r').'.html' | silent execute '!pandoc --standalone "%" -c ~/Notes/vimwiki/html/pandoc.css -o "'.fn.'"'
endif

" Rust auto-formatting on save
let g:rustfmt_autosave = 1
let g:cargo_makeprg_params = 'run'

" send external command output to terminal window, so that colours are enabled
set guioptions+=!

" enable mouse control in terminal vim
set mouse=a
packloadall