Auto trim trailing spaces on save. Tab autocompletes when under a word. F2 cleans search pattern. Added i3config syntax plugin

.gitmodules

@@ -22,3 +22,6 @@
 [submodule "pack/plugins/start/vimproc.vim"]
 	path = pack/plugins/start/vimproc.vim
 	url = https://github.com/Shougo/vimproc.vim.git
+[submodule "pack/plugins/start/i3config.vim"]
+	path = pack/plugins/start/i3config.vim
+	url = https://github.com/mboughaba/i3config.vim.git

init.vim

@@ -1,4 +1,4 @@
-" vim: set tw=80 :
+" vim: set et sw=2 ts=2 tw=80 :
 
 " SETTINGS
 
@@ -32,12 +32,37 @@ set wildignore+=**/node_modules/**
 
 " ADDITIONAL COMMANDS
 
+inoremap <S-tab> <C-d>
+
 " make escape work in terminal and send ESC to terminal with C-Esc
 tnoremap <Esc> <C-\><C-n>
 tnoremap <C-Esc> <Esc>
 
-" clear search with F2
-nnoremap <F2> noh
+" activate autocompletion using `key` when under a 'keyword' char
+" (a-zA-Z + relevant characters for current language), otherwise just send TAB
+function! AutocompleteIfKeyword()
+  let curcol = col('.') - 1 " column position before the cursor
+  if !curcol " if at the beginning of the line
+    return "\<tab>" " insert TAB character
+  elseif getline('.')[curcol - 1] =~ '\k' " if current character is a 'keyword'
+    return g:autocomplete_key " activate autocompletion for current word
+  else " if the current char is not a 'keyword'
+    return "\<tab>" " insert TAB characher
+  end
+endfunction
+
+" autocomplete using `key` with tab if cursor is under a 'keyword' char.
+" for <C-r>= see: https://stackoverflow.com/questions/10862457
+inoremap <silent> <tab> <C-r>=AutocompleteIfKeyword()<CR>
+
+" use standard vim autocomplete as fallback
+let g:autocomplete_key = "\<C-n>"
+
+" autocomplete with Tsuquyomi on TypeScript files
+autocmd FileType typescript let g:autocomplete_key = "\<C-x>\<C-o>"
+
+" clear search pattern with F2
+noremap <F2> :let @/ = ""<CR>
 
 " Use "," as leader
 let mapleader = ","
@@ -46,22 +71,32 @@ let mapleader = ","
 nnoremap <Leader>w <C-w><C-w>
 
 " Show next buffer with: Leader n
-nnoremap <Leader>n :bn<cr>
+nnoremap <Leader>n :bn<CR>
+
+" Fix indentation with: Leader i
+nnoremap <Leader>i mzgg=G`z
 
 " Delete buffer with: Leader d
-nnoremap <Leader>d :bd<cr>
+nnoremap <Leader>d :bd<CR>
 
-" clear trailing spaces with: Leader t s
-nnoremap <Leader>ts :%s/\s *$//g<CR>
+" clear trailing spaces in file
+function! g:ClearTrailingSpaces()
+  silent! %s/\s *$//g
+  let @/ = "" " clear last search
+endfunction
+
+" remove trailing spaces with: Leader t s
+nnoremap <silent> <Leader>ts :call ClearTrailingSpaces()<CR>
+
+" automatically remove trailing spaces when saving a file
+autocmd BufWrite * call ClearTrailingSpaces()
 
 " Reload config with: Leader R
-nnoremap <Leader>R :source ~/.config/nvim/init.vim<cr>
+nnoremap <Leader>R :source ~/.config/nvim/init.vim<CR>
 
 " show Vim's true competitor with: Leader r c m
 nnoremap <Leader>rcm :!open https://youtu.be/jn40Ugz0vuk<CR><CR>
 
-autocmd FileType typescript imap <tab> <C-x><C-o>
-
 " COLORSCHEME
 
 " set colorscheme to onedark.im for nvim and airline

pack/plugins/start/i3config.vim

@@ -0,0 +1 @@
+Subproject commit c68bbb54d97ab8cea46b866e86a584f4d7a9db4a