tmux.conf

### Global options

# Change the prefix (leader) key
set-option -g prefix c-a

# Key repress timeout
set-option -g repeat-time 3000

# History limit
set-option -g history-limit 10000

# support 256 colors
set-option -g default-terminal "screen-256color"
# needed for italics fix - but breaks alternate screen which
# alternate-screen doesn't seem to fix
# set-option -g default-terminal "tmux-256color"
# fix italics
# set -as terminal-overrides ',xterm*:sitm=\E[3m'
# set-option -g alternate-screen on

# turn on utf8
# set-window-option -g utf8 on

# start windows from index 1
set-option -g base-index 1

# start panes from index 1
set-window-option -g pane-base-index 1

# no delay between command sequences
set-option -sg escape-time 0

# current window only as small as smallest client watching it
set-window-option -g aggressive-resize on

set-option -g wrap-search off

set -g focus-events on 

### Key mappings

# reload config
bind-key R source-file ~/.tmux.conf \; \
    display-message "Tmux config reloaded"

# send prefix to nested apps
bind-key c-a send-prefix

# kill whole session
bind-key q confirm kill-session

# cycle through predefined layouts
bind-key -r L next-layout

# Don't accidentaly kill session when trying to kill pane
unbind-key q

# toggle status line
bind-key S set-option status

# kill and respawn pane
bind-key X respawn-pane -k

### Windows

# toggle last window like screen
bind-key Space last-window

# flip through windows
bind-key -r n next
bind-key -r p prev

# duplicate input into all panes of current window toggle
# bind-key -r TODO set-window-option synchronize-panes
# See xpanes to easily synchronize panes.

# additional way to select the first 10 windows
bind-key -n  F1  select-window -t :1
bind-key -n  F2  select-window -t :2
bind-key -n  F3  select-window -t :3
bind-key -n  F4  select-window -t :4
bind-key -n  F5  select-window -t :5
bind-key -n  F6  select-window -t :6
bind-key -n  F7  select-window -t :7
bind-key -n  F8  select-window -t :8
bind-key -n  F9  select-window -t :9
bind-key -n  F10 select-window -t :10
bind-key     0   select-window -t :10

### Panes

# resize pane
bind-key -r + resize-pane -U 1
bind-key -r - resize-pane -D 1
bind-key -r < resize-pane -L 1
bind-key -r > resize-pane -R 1

# "refresh" pane
bind-key -r P resize-pane -U 1 \; resize-pane -D 1

# flip through panes
bind-key -r \; select-pane -t :.+
bind-key -r ,  select-pane -t :.-

# fallback pane navigation if vim is not responding
bind-key -r l select-pane -R
bind-key -r h select-pane -L
bind-key -r k select-pane -U
bind-key -r j select-pane -D

# split a pane
bind-key C-v split-window -v
bind-key C-h split-window -h

bind-key r resize-pane -x 82

# move pane into own window
bind-key J break-pane -d
# move pane to current window
bind-key j choose-window 'join-pane -vs %%'

### Vim integration

# NOTE: current tmux pane id in environment: $TMUX_PANE
# NOTE: get several tmux infos: tmux display -p '#{pane_width}'

# 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|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 "$is_vim" "send-keys C-l"  "select-pane -R"
bind-key -n 'C-\' if-shell "$is_vim" "send-keys 'C-\\'" "select-pane -l"

# Restore Clear Screen (C-l)
bind-key C-l send-keys 'C-l'

### Copy-mode

# use vim motion keys while in copy mode
set-option -g status-keys vi
set-window-option -g mode-keys vi
set-window-option -g xterm-keys on

# List copy-mode keymaps:
# tmux list-keys ; tmux list-keys -t copy-mode-vi

bind-key c-b copy-mode \; send-keys c-b c-f

# bind-key -T copy-mode-vi y send -X copy-pipe "xclip -i >/dev/null"
bind-key -T copy-mode-vi y send -X copy-pipe-and-cancel "xclip -i -selection clip-board >/dev/null"
bind-key -T copy-mode-vi  v send-keys -X begin-selection
bind-key -T copy-mode-vi C-v send-keys -X rectangle-toggle

unbind-key -T copy-mode-vi Enter

### Status line

# To see configuration changes of the status line
# all tmux instances have to be restarted

set-window-option -g monitor-activity on
set-option -g visual-activity off
# set-option -g visual-content off
set-option -g visual-bell off
set-option -g bell-action none

# left length - default is 10
set-option -g status-left-length 80

set-option -g status-left " #H "

## colors
set-option -g status-style 'bg=colour249,fg=colour240'
# set-option -g status-attr dim

# active window title colors
set-window-option -g window-status-style bg=colour249,fg=colour238
set-option -g window-status-current-style 'bg=#E2E3E5'

# TODO: find nicer style; fix vim leave activity
set-option -g window-status-activity-style ''
# set-option -g window-status-activity-style 'bg=#CCE5FF'
# set-option -g window-status-bell-style 'bg=#CCE5FF'

# Highlight active window background
# set -g window-style 'bg=colour231'
# set -g window-active-style 'bg=colour231'

set -g pane-border-style 'fg=colour245,bg=colour245'
set -g pane-active-border-style 'fg=colour245,bg=colour245'

# window title status format
set-option -g window-status-format "#I"
set-option -g window-status-current-format "#I"
set-option -g window-status-separator "  "

set-option -g status-right "KW%V | %a | %F | %R "

# command/message line colors
set-option -g message-style 'bg=colour249,fg=black'