Split tmux windows with same keys as in Emacs?

Now, dreams become true: https://github.com/tmux/tmux/issues/2904

My use case is:

• If a tmux pane is focused and emacsclient is not focused (eg. on termial prompt), use [C-x o] to switch to the next tmux pane on the same window.
• If a tmux pane is focused and emacsclient is focused as well, then let emacs handles [C-x o].

tmux.conf:

is_emacs='echo "#{pane_current_command}" | grep -iqE "emacs"'
bind -Temacs-keys o if-shell "$is_emacs" "send C-x; send" "select-pane -t :.+"
bind -Temacs-keys Any { send C-x; send }
bind -Troot C-x switch-client -Temacs-keys

init.el:

;;; Tmux integration (See tmux.conf for details).
(defun id/other-window ()
  "Switch to the next window if opened, otherwise select next tmux pane."
  (interactive)
  (if (eq (next-window) (get-buffer-window))
      (call-process "tmux" nil nil nil "select-pane" "-t" ":.+")
    (other-window 1)))

(global-set-key [remap other-window] #'id/other-window)

I am using this tmux conf to emulate the same behavior with splits. Is uses the same shortcuts to split into different panes the window I set the prefix to C-x, and the behavior to select the panes is similar than dealing with buffers in emacs. Give it a try and modify it yourself to feel more comfortable.

# remap prefix from 'C-b' to 'C-x'
unbind C-b
set-option -g prefix C-x
bind-key C-x send-prefix

# split panes using 3 and 2
bind 3 split-window -h
bind 2 split-window -v
unbind '"'
unbind %

# switch panes using Alt-arrow without prefix
bind Left select-pane -L
bind Right select-pane -R
bind Up select-pane -U
bind Down select-pane -D

# Enable switch session similar than emacs selecting buffer
unbind s
bind b choose-tree -w

# Kill window
bind k confirm kill-window

# Source the conf file
bind r source-file ~/.tmux.conf

# Use C-x 0 to close panel, similar than emacs when closing the splitted window
unbind 0
bind 0 kill-pane

Have a look at the must read at http://pragprog.com/book/bhtmux/tmux; you'll get anything you need Further on, try out this:

# Setting the prefix from C-b to C-d 
# START:prefix
set -g prefix C-d 
# END:prefix 

# Ensure that we can send Ctrl-A to other apps 
bind C-d send-prefix 

# Free the original Ctrl-b prefix keybinding unbind C-b
unbind C-b

bind | split-window -h
bind _ split-window -v

And this for moving between panes:

bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R

Both from the previous reference and the man page.