.tmux.conf

# Key bindings first, other settings come at the bottom of this file

# set prefix key to ^A
unbind C-b
set -g prefix C-a

# set prefix key to ^B for client inside window
bind-key -n C-b send-prefix

# Source .tmux.conf as suggested in `man tmux`
bind R \
  source-file "$DOTFILES_HOME/.tmux.conf" \;\
  display "Sourced $DOTFILES_HOME/.tmux.conf"

# Act like vim in copy mode
setw -g mode-keys vi

# Act a bit like vim in pane switching
bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R

# Not quite like vim, but at least enable switching windows without moving to arrow keys
bind-key -r C-h select-window -t :-
bind-key -r C-l select-window -t :+

# Easier and faster switching between next/prev/last window
# https://github.com/tmux-plugins/tmux-sensible
bind C-p previous-window
bind C-n next-window

# Toggle mouse on with m
bind m \
  set -g mode-mouse on \;\
  set -g mouse-resize-pane on \;\
  set -g mouse-select-pane on \;\
  set -g mouse-select-window on \;\
  display 'Mouse: ON'

# Toggle mouse off with M
bind M \
  set -g mode-mouse off \;\
  set -g mouse-resize-pane off \;\
  set -g mouse-select-pane off \;\
  set -g mouse-select-window off \;\
  display 'Mouse: OFF'

# Really useful with tmux-cssh or tmux-cluster (tmc)
# https://stackoverflow.com/a/26774547/12178985
bind-key a set-window-option synchronize-panes\; display-message "synchronize-panes is now #{?pane_synchronized,on,off}"

# Reorder windows easily
bind S-Left swap-window -t -1
bind S-Right swap-window -t +1

# Zoom in on one pane
bind + if-shell "tmux list-panes | wc -l | grep -Fx 1" \
    "display-message 'Only one pane in this window!'" \
    "new-window -d -n tmux-zoom 'clear && echo TMUX ZOOM && read' ;\
     swap-pane -s tmux-zoom.1 ;\
     select-window -t tmux-zoom"

unbind -
bind - \
  last-window \;\
  swap-pane -s tmux-zoom.1 \;\
  kill-window -t tmux-zoom

# set first window to index 1 (not 0) to map more to the keyboard layout
set -g base-index 1
setw -g pane-base-index 1

# keep windows renumbered acording to position
set -g renumber-windows on


# Ring the bell if any background window rang a bell
set -g bell-action any

# Watch for activity in background windows
setw -g monitor-activity on


# Some more modern display behaviors
# https://github.com/tmux-plugins/tmux-sensible

# scrollback size
set -g history-limit 100000

# 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

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


# Behave better and in more modern fashion in interacting with applications inside tmux:

# pass through xterm keys
set -g xterm-keys on

# Pass through focus events
# This is especially important for Vim/Neovim autoread
set -g focus-events on

# https://github.com/tmux/tmux/wiki/FAQ#what-is-the-escape-time-option-is-zero-a-good-value
# This is especially necessary for Neovim
set-option -sg escape-time 10

# https://github.com/tmux/tmux/wiki/FAQ#i-dont-see-italics-or-italics-and-reverse-are-the-wrong-way-round
# https://github.com/tmux/tmux/wiki/FAQ#how-do-i-use-a-256-colour-terminal
set -g default-terminal "tmux-256color"