.tmux.conf

#
# File: $HOME/.tmux.conf
# Author: Pavol Plaskon, pavol.plaskon@gmail.com
#
# Based on: https://github.com/s3rvac/dotfiles/blob/master/tmux/.tmux.conf
#

# Rebind the prefix from C-b to C-Space.
unbind C-b
set -g prefix C-Space
bind C-Space send-prefix

#------------------------------------------------------------------------------
# Settings.
#------------------------------------------------------------------------------

# Support 256 colors in the terminal emulator.
set -g default-terminal "screen-256color"

# Disable the delay between an escape key press and subsequent characters.
# This increases Vim responsiveness.
set -sg escape-time 0

# Set the base index for windows to 1 instead of 0.
set -g base-index 1

# Set the base index for panes to 1 instead of 0.
setw -g pane-base-index 1

# Scrollback limit.
set -g history-limit 10000

# Enable terminal-emulator scrolling.
set -ga terminal-overrides ",xterm*:smcup@:rmcup@"

# Pass xterm-style keys to make key combinations work as expected.
setw -g xterm-keys on

# Disable mouse in tmux. This makes tmux pass control directly to the used
# terminal emulator, so I can copy&paste as if I am not using tmux.
# tmux < v2.1:
if-shell "[[ `tmux -V | cut -d' ' -f2` -lt 2.1 ]]" "setw -g mode-mouse off"
# tmux >= v2.1:
if-shell "[[ `tmux -V | cut -d' ' -f2` -ge 2.1 ]]" "setw -g mouse off"

# Monitor window activity. Windows with activity are then highlighted in the
# status line.
setw -g monitor-activity on

# Prevent tmux from displaying "Activity in window X" messages.
set -g visual-activity off

# Enable vi keys.
set -g status-keys vi
setw -g mode-keys vi

# Enable utf-8. Only available in tmux < v2.2.
if-shell "[[ `tmux -V | cut -d' ' -f2` -lt 2.1 ]]" "setw -gq utf8 on"
if-shell "[[ `tmux -V | cut -d' ' -f2` -lt 2.1 ]]" "set -gq status-utf8 on"

# Enable setting of terminal-emulator titles.
set -g set-titles on
set -g set-titles-string "#h"

# Automatically re-number windows after one of them is closed.
set -g renumber-windows on

#------------------------------------------------------------------------------
# Key Bindings.
#------------------------------------------------------------------------------

# Smart pane switching with awareness of Vim splits. Now, I can use Ctrl+hjkl
# in both Vim and Tmux (without using the prefix). Based on
# https://www.codeography.com/2013/06/19/navigating-vim-and-tmux-splits.
# Note: I do not use https://github.com/christoomey/vim-tmux-navigator because
#       it does not work when vim is run over ssh.
# Note: The "... || true" part is there to prevent annoying messages when there
#       is no pane to switch into.
bind -n C-h run "(tmux display-message -p '#{pane_title}' | grep -iq vim && tmux send-keys C-h) || (tmux select-pane -L || true)"
bind -n C-j run "(tmux display-message -p '#{pane_title}' | grep -iq vim && tmux send-keys C-j) || (tmux select-pane -D || true)"
bind -n C-k run "(tmux display-message -p '#{pane_title}' | grep -iq vim && tmux send-keys C-k) || (tmux select-pane -U || true)"
bind -n C-l run "(tmux display-message -p '#{pane_title}' | grep -iq vim && tmux send-keys C-l) || (tmux select-pane -R || true)"

# Occasionally, it may happen that the above smart-pane-switching keys do not
# work. In such a case, the following bindings allow me to force pane switching
# by using Ctrl+hjkl with prefix.
bind C-h select-pane -L
bind C-j select-pane -D
bind C-k select-pane -U
bind C-l select-pane -R

# Pane resizing.
bind -r M-h resize-pane -L 5
bind -r M-j resize-pane -D 5
bind -r M-k resize-pane -U 5
bind -r M-l resize-pane -R 5

# Pane splitting.
bind | split-window -h -c "#{pane_current_path}"
bind - split-window -v -c "#{pane_current_path}"

# Movement of windows.
bind -r < swap-window -t -1
bind -r > swap-window -t +1

# Create a new window starting in the current working directory rather than in
# the default directory.
bind C new-window -c "#{pane_current_path}"

# Make the prefix and 0 go to window number 10 (I use window numbering starting
# from 1).
bind 0 select-window -t :10

# Do not display the original window's name when renaming it. This makes
# renaming faster since one does not need to first erase the original name.
bind , command-prompt -p "(rename-window '#W')" "rename-window '%%'"

# Do the same for sessions.
bind '$' command-prompt -p "(rename-session '#S')" "rename-session '%%'"

# Make f search only in window names (-N), not in titles (-T) or contents (-C).
# The default is -CNT.
bind f command-prompt -p "(find-window)" "find-window -N '%%'"

# Clear activity flags from all windows in the current session.
# Based on https://stackoverflow.com/a/12670429/2580955.
# Note: The 'tmux-select-each' script has to be available in $PATH.
bind Space run-shell "tmux-select-each '#S'"

# Configuration file reload.
bind R source-file ~/.tmux.conf \; display "Configuration reloaded."

# Toggle pane synchronization.
bind S set synchronize-panes

# Make b start copy mode.
bind b copy-mode

# Make Ctrl+b start copy mode and scroll one page up (just like PgUp does).
bind C-b copy-mode -u

# Make copy mode behave more like Vim.
# Moreover, make 'y' copy also to the system clipboard.
if-shell "[[ `tmux -V | cut -d' ' -f2` -lt 2.4 ]]" \
	"bind -t vi-copy v begin-selection; \
	bind -t vi-copy C-v rectangle-toggle; \
	bind -t vi-copy y copy-pipe 'xclip -filter -selection clipboard | xclip -selection primary'"

if-shell "[[ `tmux -V | cut -d' ' -f2` -gt 2.3 ]]" \
	"bind -T copy-mode-vi 'v' send -X begin-selection; \
	bind -T copy-mode-vi 'C-v' send -X rectangle-toggle; \
	bind -T copy-mode-vi 'y' send -X copy-pipe 'xclip -filter -selection clipboard | xclip -selection primary'"

#------------------------------------------------------------------------------
# Design changes
# Source: https://www.hamvocke.com/blog/a-guide-to-customizing-your-tmux-conf/
#------------------------------------------------------------------------------

## Status bar design
#set -g status-utf8 on
set -g status-justify left
set -g status-bg default
set -g status-fg colour12
set -g status-interval 2

# Messaging
set -g message-style fg=black,bg=yellow
set -g message-command-style fg=blue,bg=black

# Window mode
setw -g mode-style fg=colour0,bg=colour6

# Window status
setw -g window-status-format " #F#I:#W#F "
setw -g window-status-current-format " #F#I:#W#F "
setw -g window-status-format "#[fg=magenta]#[bg=black] #I #[bg=cyan]#[fg=colour8] #W "
setw -g window-status-current-format "#[bg=brightmagenta]#[fg=colour8] #I #[fg=colour8]#[bg=colour14] #W "
setw -g window-status-current-style fg=colour11,bg=colour0,dim
setw -g window-status-style fg=black,bg=green,reverse

# Info on left (I don't have a session display for now)
set -g status-left ''

# Loud or quiet?
set-option -g visual-activity off
set-option -g visual-bell off
set-option -g visual-silence off
set-window-option -g monitor-activity off
set-option -g bell-action none

set -g default-terminal "screen-256color"

# The modes {
setw -g clock-mode-colour colour135
setw -g mode-style fg=colour196,bg=colour238,bold

# }
# The panes {

set -g pane-border-style fg=white,bg=colour16
set -g pane-active-border-style fg=green,bg=colour16

# }
# The statusbar {

set -g status-position bottom
set -g status-style fg=colour137,bg=colour234,dim
set -g status-left ''
set -g status-right '#[fg=colour233,bg=colour241,bold] %d/%m #[fg=colour233,bg=colour245,bold] %H:%M:%S '
set -g status-right-length 50
set -g status-left-length 20

setw -g window-status-current-style fg=colour81,bg=colour238,bold
setw -g window-status-current-format ' #I#[fg=colour250]:#[fg=colour255]#W#[fg=colour50]#F '

setw -g window-status-style fg=colour138,bg=colour235,none
setw -g window-status-format ' #I#[fg=colour237]:#[fg=colour250]#W#[fg=colour244]#F '

setw -g window-status-bell-style fg=colour255,bg=colour1,bold

# }
# The messages {

set -g message-style fg=colour232,bg=colour166,bold

# }