vim,tmux:plugs: Add vim-tmux-navigator

[vim-tmux-navigator][1]:

> Seamless navigation between tmux panes and vim splits

Add the hybrid vim/tmux plugin `vim-tmux-navigator` to switch between
tmux panes and vim splits with `C-[hjkl]`.

Add vim-tmux-navigator as a submodule in tmux/plugins and create a
symlink from vim/pack/plugins/start.

Get rid of similar switching keymappings in the vim and tmux configs.

[1]: https://github.com/christoomey/vim-tmux-navigator

.config/tmux/tmux.conf

@@ -25,12 +25,6 @@ bind-key > split-window -h -c "#{pane_current_path}"
 # Create new window in current path
 bind-key -T prefix c new-window -c "#{pane_current_path}"
 
-# Change panes with Alt-<arrow>
-bind -n M-Left select-pane -L
-bind -n M-Right select-pane -R
-bind -n M-Up select-pane -U
-bind -n M-Down select-pane -D
-
 # Resource config
 bind-key -T prefix R source-file "$XDG_CONFIG_HOME/tmux/tmux.conf" \; display-message "Sourced $XDG_CONFIG_HOME/tmux/tmux.conf"
 
@@ -50,17 +44,14 @@ bind-key -T copy-mode-vi v send-keys -X begin-selection
 # Yank into system clipboard
 bind-key -T copy-mode-vi y send-keys -X copy-pipe "xclip -selection clipboard"
 
-# Navigate panes with hjkl
+# Navigate panes with <prefix>-[hjkl]
+# NOTE: C-[hjkl] (w/o prefix) moves through vim splits and tmux panes
+#       See vim-tmux-navigator
 unbind -T prefix l
 bind -T prefix h select-pane -L
 bind -T prefix j select-pane -D
 bind -T prefix k select-pane -U
 bind -T prefix l select-pane -R
-# Allow holding Ctrl after pressing the prefix
-bind -T prefix C-h select-pane -L
-bind -T prefix C-j select-pane -D
-bind -T prefix C-k select-pane -U
-bind -T prefix C-l select-pane -R
 # Resize panes with Alt-Shift-[hjkl]
 bind -n M-H resize-pane -L
 bind -n M-J resize-pane -D
@@ -82,6 +73,7 @@ set -g @plugin 'tmux-plugins/tmux-prefix-highlight'
 set -g @plugin 'tmux-plugins/tmux-resurrect'
 set -g @plugin 'tmux-plugins/tmux-sensible'
 set -g @plugin 'tmux-plugins/tpm'
+set -g @plugin 'vim-tmux-navigator'
 
 # Capture pane content
 set -g @resurrect-capture-pane-contents 'on'

.config/vim/pack/plugins/start/vim-tmux-navigator

@@ -0,0 +1 @@
+../../../../tmux/plugins/vim-tmux-navigator/

.config/vim/vimrc.d/40-keys.vim

@@ -11,11 +11,6 @@ nnoremap <silent> <Esc> :nohlsearch<CR><Esc>
 " Create new panes
 nnoremap <C-w>N :vsplit<CR>
 nnoremap <C-w>n :split<CR>
-" Move between panes
-nnoremap <C-h> <C-w><C-h>
-nnoremap <C-j> <C-w><C-j>
-nnoremap <C-k> <C-w><C-k>
-nnoremap <C-l> <C-w><C-l>
 
 " Substitute command
 if (exists('+inccommand') && &inccommand != '')

.gitmodules

@@ -35,6 +35,9 @@
 [submodule "tpm"]
 	path = .config/tmux/plugins/tpm
 	url = https://github.com/tmux-plugins/tpm
+[submodule "vim-tmux-navigator"]
+	path = .config/tmux/plugins/vim-tmux-navigator
+	url = https://github.com/christoomey/vim-tmux-navigator
 
 # vim
 [submodule "arm-syntax-vim"]