autocmds.vim

" ----------------------------------------
" Auto Commands
" ----------------------------------------

if has('autocmd')
  augroup MyAutoCommands
    " Clear the auto command group so we don't define it multiple times
    " Idea from http://learnvimscriptthehardway.stevelosh.com/chapters/14.html
    autocmd!
    " No formatting on o key newlines
    autocmd BufNewFile,BufEnter * set formatoptions-=o

    " No more complaining about untitled documents
    autocmd FocusLost silent! :wa

    " When editing a file, always jump to the last cursor position.
    " This must be after the uncompress commands.
    autocmd BufReadPost *
          \ if line("'\"") > 1 && line ("'\"") <= line("$") |
          \   exe "normal! g`\"" |
          \ endif

    " Fix trailing whitespace in my most used programming langauges
    autocmd BufWritePre *.py,*.coffee,*.rb,*.erb,*.md,*.scss,*.vim,Cakefile,
          \*.hbs
          \ silent! :StripTrailingWhiteSpace

    " Help mode bindings
    " <enter> to follow tag, <bs> to go back, and q to quit.
    " From http://ctoomey.com/posts/an-incremental-approach-to-vim/
    autocmd filetype help nnoremap <buffer><cr> <c-]>
    autocmd filetype help nnoremap <buffer><bs> <c-T>
    autocmd filetype help nnoremap <buffer>q :q<CR>

    " Fix accidental indentation in html files
    " from http://morearty.com/blog/2013/01/22/fixing-vims-indenting-of-html-files.html
    autocmd FileType html setlocal indentkeys-=*<Return>

    " Leave the return key alone when in command line windows, since it's used
    " to run commands there.
    autocmd! CmdwinEnter * :unmap <cr>
    autocmd! CmdwinLeave * :call MapCR()

    " Resize splits when the window is resized
    " from https://bitbucket.org/sjl/dotfiles/src/tip/vim/vimrc
    au VimResized * :wincmd =

    " via https://jdhao.github.io/2020/05/22/highlight_yank_region_nvim
    au TextYankPost * silent! lua vim.highlight.on_yank{higroup="IncSearch", timeout=400}

    " Highlight .mdx files as markdown
    autocmd BufRead,BufNewFile *.mdx set filetype=markdown

    " Set conceallevel to 2 for json files
    autocmd FileType json setlocal conceallevel=2
  augroup END
endif