tmux.conf

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

# split panes using | and -
bind \\ split-window -h
bind - split-window -v
unbind '"'
unbind %

# Mouse mode
set -g mouse on

# Options from the sensible plugin

# Address vim mode switching delay (http://superuser.com/a/252717/65504)
set -s escape-time 0

# Increase scrollback buffer size from 2000 to 50000 lines
set -g history-limit 50000

# Increase tmux messages display duration from 750ms to 4s
set -g display-time 4000

# Refresh 'status-left' and 'status-right' more often, from every 15s to 5s
set -g status-interval 5

# Emacs key bindings in tmux command prompt (prefix + :) are better than
# vi keys, even for vim users
set -g status-keys emacs

# Focus events enabled for terminals that support them
set -g focus-events on

# Super useful when using "grouped sessions" and multi-monitor setup
setw -g aggressive-resize on

# clear both screen and history
bind -n C-l send-keys C-l \; run 'sleep 0.2' \; clear-history

is_vim="ps -o state= -o comm= -t '#{pane_tty}' | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|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'

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 -n 'M-h' if-shell "$is_vim" 'send-keys M-h' 'resize-pane -L 1'
bind -n 'M-j' if-shell "$is_vim" 'send-keys M-j' 'resize-pane -D 1'
bind -n 'M-k' if-shell "$is_vim" 'send-keys M-k' 'resize-pane -U 1'
bind -n 'M-l' if-shell "$is_vim" 'send-keys M-l' 'resize-pane -R 1'

bind-key -T copy-mode-vi M-h resize-pane -L 1
bind-key -T copy-mode-vi M-j resize-pane -D 1
bind-key -T copy-mode-vi M-k resize-pane -U 1
bind-key -T copy-mode-vi M-l resize-pane -R 1

bind > swap-pane -D       # swap current pane with the next one
bind < swap-pane -U       # swap current pane with the previous one

# These two lines make nvim color scheme and italics work properly
set -g default-terminal "xterm-256color"
set-option -sa terminal-overrides ",xterm*:Tc"

# Plugin mangeer
set -g @plugin 'tmux-plugins/tpm'

# Theme
set -g @plugin 'tmux-plugins/tmux-prefix-highlight'
set -g @plugin 'hoshiya4522/tokyo-night-tmux'

# Initialize TMUX plugin manager (keep this line at the very bottom of tmux.conf)
run '~/.config/tmux/plugins/tpm/tpm'