Added optional YCM integration

vimrc

@@ -1,20 +1,29 @@
 execute pathogen#infect()
 
+" Tab length-related settings
 set expandtab
 set tabstop=4
 set shiftwidth=4
+
+" Mouse mode
 set mouse=nicr
 set ttymouse=sgr "Support wide screens
+
+" Search Settings
 set incsearch
 set hlsearch
 set ignorecase
 set smartcase
 set smartindent
-set tags=./tags;
 :nnoremap <silent> <Space> :nohlsearch<Bar>:echo<CR>
+
 syntax on
 filetype plugin indent on
 colorscheme apprentice
+set switchbuf+=uselast " Use last window when making selection from quickfix window
+set redrawtime=5000 " Increase maximum redraw time to use syntax highlighting for large files
+
+set backspace=indent,eol,start " Make backspace key work in insert mode
 
 nnoremap tn :tabnew<CR>
 
@@ -27,7 +36,12 @@ map <A-]> :vsp <CR>:exec("tag ".expand("<cword>"))<CR>
 " Load all of the helptags now, after plugins have been loaded.
 " All messages and errors will be ignored.
  silent! helptags ALL
-"
+
+" Return to last edit position whan opening a file
+autocmd BufReadPost *
+     \ if line("'\"") > 0 && line("'\"") <= line("$") |
+     \   exe "normal! g`\"" |
+     \ endif 
 
 if &term =~ '^screen'
     " tmux will send xterm-style keys when its xterm-keys option is on
@@ -42,22 +56,56 @@ nnoremap <leader>n :NERDTreeFocus<CR>
 nnoremap <C-n> :NERDTreeToggle<CR>
 nnoremap <C-f> :NERDTreeFind<CR>
 
-" Taglist
+"""" Taglist
+set tags=./tags; " Recursively search backwards for ctags file
+" CTRL-l to open taglist
 nnoremap <C-l> :TlistToggle<CR>
+" CTRL-p to show function name in status bar
 nnoremap <C-p> :TlistShowPrototype<CR>
-let Tlist_Use_Right_Window = 1  " Move window to right side
-let Tlist_Exit_OnlyWindow = 1   " Close if only window left
-let Tlist_Hightlight_Tag_On_BufEnter  = 1 " Hightlight current tag
-let Tlist_Display_Prototypte = 1 " Show full prototype at bottom
+let Tlist_Use_Right_Window = 1              " Move window to right side
+let Tlist_Exit_OnlyWindow = 1               " Close if only window left
+let Tlist_Hightlight_Tag_On_BufEnter  = 1   " Hightlight current tag
+let Tlist_Display_Prototypte = 1            " Show full prototype at bottom
 let Tlist_Ctags_Cmd = 'ctags --extra=-q --c++-kinds=-p'
 
-" vim-rainbow
+"""" vim-rainbow
 let g:rainbow_active = 1
 let g:rainbow_guifgs = ['RoyalBlue3', 'DarkOrange3', 'DarkOrchid3', 'FireBrick']
 let g:rainbow_ctermfgs = ['lightblue', 'lightgreen', 'yellow', 'red', 'magenta']
 
+"""" Gitgutter
+" CTRL-g to toggle GitGutter display
 nnoremap <C-g> :GitGutterToggle<CR>
 
+" Fugitive conflict resolution
+nnoremap <leader>gd :Gvdiff<CR>
+nnoremap gdh :diffget //2<CR>
+nnoremap gdl :diffget //3<CR>
+
+"""" YAML editor settings
+autocmd FileType yaml setlocal ts=2 sts=2 sw=2 expandtab
+autocmd FileType yml setlocal ts=2 sts=2 sw=2 expandtab
+autocmd FileType puml setlocal ts=4 sts=4 sw=4 expandtab
+let g:indentLine_char = '┆'
+let g:indentLine_color_term = 237
+
+" vim-airline
+let g:airline#extensions#whitespace#enabled = 0
+" Hide branch information in status line
+if !exists('g:airline_symbols')
+  let g:airline_symbols = {}
+endif
+let g:airline_symbols.colnr = ''
+let g:airline#extensions#taglist#enabled = 1
+let g:airline#extensions#tabline#enabled = 0
+let g:airline#extensions#bufferline#enabled = 0
+function! InitAirline()
+    let g:airline_section_b = airline#section#create([])
+endfunction
+autocmd VimEnter * call InitAirline()
+
+""" Use one of these options depending on software
+"" OPTION A: Vim 8.x without YCM (easy setup)
 " OmniCpp
 let OmniCpp_MayCompleteDot = 0
 let OmniCpp_MayCompleteArrow = 0
@@ -66,17 +114,6 @@ let OmniCpp_MayCompleteArrow = 0
 " Supertab
 let g:SuperTabDefaultCompletionType = "<c-x><c-]>"
 
-" Fugitive conflict resolution
-nnoremap <leader>gd :Gvdiff<CR>
-nnoremap gdh :diffget //2<CR>
-nnoremap gdl :diffget //3<CR>
-
-" YAML editor settings
-autocmd FileType yaml setlocal ts=2 sts=2 sw=2 expandtab
-autocmd FileType yml setlocal ts=2 sts=2 sw=2 expandtab
-let g:indentLine_char = '┆'
-let g:indentLine_color_term = 237
-
 " Syntastic
 set statusline+=%#warningmsg#
 set statusline+=%{SyntasticStatuslineFlag()}
@@ -95,10 +132,24 @@ nnoremap <C-y> :SyntasticToggleMode<CR>
 " autocmd FileType cpp if stridx(expand("%:p"), "/home/anaber/work/trenton/") == 0 |
 "     \ let g:syntastic_cpp_clang_tidy_args = "-p /home/anaber/work/trenton" | endif
 
-" vim-airline
-let g:airline#extensions#whitespace#enabled = 0
-if !exists('g:airline_symbols')
-  let g:airline_symbols = {}
-endif
-let g:airline_symbols.colnr = ''
-let g:airline#extensions#taglist#enabled = 1
+"" OPTION B: Vim 9.x + Python3 support + YCM (really nice)
+" YouCompleteMe settings
+"let g:ycm_autoclose_preview_window_after_insertion = 1
+"let g:ycm_autoclose_preview_window_after_completion = 1
+"let g:ycm_open_loclist_on_ycm_diags = 1          " Open location list to view diagnostics
+"let g:ycm_max_num_candidates = 20                " Max number of completion suggestions 
+"let g:ycm_max_num_candidates = 20                " Max number of completion suggestions 
+"let g:ycm_max_num_identifier_candidates = 10     " Max number of identifier-based suggestions
+"let g:ycm_auto_trigger = 0                       " Disable completion menu. Use <C-space> for completion
+"let g:ycm_show_diagnostic_ui = 1                 " Show diagnostic display features
+"let g:ycm_error_symbol = '>>'                    " The error symbol in Vim gutter
+"let g:ycm_enable_diagnostic_signs = 1            " Display icons in Vim's gutter, error, warnings
+"let g:ycm_enable_diagnostic_highlighting = 1     " Highlight regions of diagnostic text
+"let g:ycm_echo_current_diagnostic = 1            " Echo line's diagnostic that cursor is on
+"let g:ycm_min_num_of_chars_for_completion = 4    " Wait for 4 characters before completion
+"
+"" Show compilation errors
+"nnoremap <silent> <C-y> :YcmDiags<CR>
+"" Toggle documentation popup (\D)
+"nmap <leader>D <plug>(YCMHover)
+""" END OPTIONS