allow to navigate seamlessly between vim and tmux splits using a consistent set of hotkeys

.tmux.conf

@@ -14,10 +14,10 @@ bind-key -r C-h resize-pane -L
 bind-key -r C-l resize-pane -R
 
 # vim-like pane switching
-bind-key -n C-k select-pane -U 
-bind-key -n C-j select-pane -D 
-bind-key -n C-h select-pane -L 
-bind-key -n C-l select-pane -R 
+# bind-key -n C-k select-pane -U 
+# bind-key -n C-j select-pane -D 
+# bind-key -n C-h select-pane -L 
+# bind-key -n C-l select-pane -R 
 
 # and now unbind keys
 unbind Up     
@@ -29,3 +29,23 @@ unbind C-Up
 unbind C-Down 
 unbind C-Left 
 unbind C-Right
+
+# Smart pane switching with awareness of Vim splits.
+# See: https://github.com/christoomey/vim-tmux-navigator
+is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
+    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|l?n?vim?x?)(diff)?$'"
+bind-key -n 'C-h' if-shell "$is_vim" 'send-keys C-h'  'select-pane -L'
+bind-key -n 'C-j' if-shell "$is_vim" 'send-keys C-j'  'select-pane -D'
+bind-key -n 'C-k' if-shell "$is_vim" 'send-keys C-k'  'select-pane -U'
+bind-key -n 'C-l' if-shell "$is_vim" 'send-keys C-l'  'select-pane -R'
+tmux_version='$(tmux -V | sed -En "s/^tmux ([0-9]+(.[0-9]+)?).*/\1/p")'
+if-shell -b '[ "$(echo "$tmux_version < 3.0" | bc)" = 1 ]' \
+    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\'  'select-pane -l'"
+if-shell -b '[ "$(echo "$tmux_version >= 3.0" | bc)" = 1 ]' \
+    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\\\'  'select-pane -l'"
+
+bind-key -T copy-mode-vi 'C-h' select-pane -L
+bind-key -T copy-mode-vi 'C-j' select-pane -D
+bind-key -T copy-mode-vi 'C-k' select-pane -U
+bind-key -T copy-mode-vi 'C-l' select-pane -R
+bind-key -T copy-mode-vi 'C-\' select-pane -l

.vimrc.bundles

@@ -49,6 +49,7 @@
         Plug 'vim-scripts/restore_view.vim'
         Plug 'mhinz/vim-startify'
 
+        Plug 'christoomey/vim-tmux-navigator'
         if executable('fzf')
             " fzf#install() makes sure that you have the latest binary, comment out because I don't want it to install binary for me
             Plug 'junegunn/fzf' ", { 'do': { -> fzf#install() } }
@@ -79,7 +80,7 @@
             " The bottom buffer display
             Plug 'Donaldttt/vim-bufferline'
             Plug 'ryanoasis/vim-devicons'
-            Plug 'Yggdroot/indentLine'
+            " Plug 'Yggdroot/indentLine'
         endif
 
         if executable('node')
@@ -135,6 +136,16 @@ endfunction
     endif
     " }
     
+    if HasPlug('vim-tmux-navigator')
+        let g:tmux_navigator_no_mappings = 1
+
+        noremap <silent> <c-h> :<C-U>TmuxNavigateLeft<cr>
+        noremap <silent> <c-j> :<C-U>TmuxNavigateDown<cr>
+        noremap <silent> <c-k> :<C-U>TmuxNavigateUp<cr>
+        noremap <silent> <c-l> :<C-U>TmuxNavigateRight<cr>
+        " noremap <silent> {Previous-Mapping} :<C-U>TmuxNavigatePrevious<cr>
+    endif
+
     " mhinz/vim-startify {
     if HasPlug("vim-startify")
         if g:vim_type == 'nvim'
@@ -199,7 +210,7 @@ endfunction
     " }
 
     " easymotion/vim-easymotion {
-    
+    if HasPlug("vim-easymotion")
         " <Leader>f{char} to move to {char}
         map  <Leader>f <Plug>(easymotion-bd-f)
         nmap <Leader>f <Plug>(easymotion-overwin-f)
@@ -214,6 +225,7 @@ endfunction
         " Move to word
         map  <Leader>w <Plug>(easymotion-bd-w)
         nmap <Leader>w <Plug>(easymotion-overwin-w)
+    endif
 
     " }
 
@@ -679,7 +691,7 @@ endfunction
     nnoremap <silent> <space>e :bnext<CR>
 
     " leader s change all occurence
-    nnoremap <silent> <Leader>s :%s/\<<C-r><C-w>\>/
+    nnoremap <Leader>s :%s/\<<C-r><C-w>\>/
 
     " leader num change tab
     " only for vim or nvim without lualine