tmux.conf

# Originally copied from Daniel Nolan's dotfile repo, with heavy modifications
#
# References
#
# * http://man.openbsd.org/OpenBSD-current/man1/tmux.1

# GENERAL SETTINGS
# ----------------

# use shell set as SHELL env variable as default shell
set-option -g default-shell $SHELL

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

# start window index at 1
set -g base-index 1
set -g pane-base-index 1
set-window-option -g pane-base-index 1

# automatically renumber windows as they are created and destroyed
set-option -g renumber-windows on

# lower the delay between the prefix key and other keys (fixes pause when using vim)
set -sg escape-time 1

# use vi-like key bindings for the tmux command prompt
set -g status-keys vi

# use vi-like key bindings in copy mode
set-window-option -g mode-keys vi

# keep up to 8k lines of pane history
set -g history-limit 8000

# monitor window activity and generate notifications
set-window-option -g monitor-activity on

# show activity notifications on status line
set -g visual-activity on

# Constrain the window size to the size of the smallest client's window, if that
# client is looking at it
set-window-option -g aggressive-resize on

# KEY BINDINGS
# ------------

# unbind old prefix
unbind C-b

# remap prefix to Control + a
set -g prefix C-f

# prefix-r to force a reload of the config file
unbind r
bind r source-file ~/.tmux.conf \; display-message "~/.tmux.conf reloaded"

# quick pane cycling
unbind ^F
bind ^F select-pane -t :.+

#new 25% vertical split pane
bind ^T split-window -p 25

# setup 'v' to being selection as in Vim
bind -T copy-mode-vi v send-keys -X begin-selection

# once in selection mode use Ctrl-v to switch to block selection mode
bind -T copy-mode-vi 'C-v' send -X rectangle-toggle

# begin selection in copy mode.
bind -T copy-mode-vi 'y' send-keys -X copy-pipe-and-cancel "pbcopy"

# allow copying with the mouse
bind -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel "pbcopy"

# update default binding of `Enter` to also use copy-pipe
bind -T copy-mode-vi Enter send-keys -X copy-pipe-and-cancel "pbcopy"

# select panes with <Prefix> h, j, k, l
bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R

# resize panes with <Prefix> H, J, K, L
bind -r J resize-pane -D 5
bind -r K resize-pane -U 5
bind -r H resize-pane -L 5
bind -r L resize-pane -R 5

# cycle windows with C-h and C-l
bind -r C-h select-window -t :-
bind -r C-l select-window -t :+

# Rebind pane splitting, set current directory to same directory as current pane
bind | split-window -h -c "#{pane_current_path}"
bind - split-window -v -c "#{pane_current_path}"

# By default show sessions with windows (and panes) collapsed when listing sessions
bind 'w' choose-tree -Zs

# Smart pane switching with awareness of vim splits
# See: https://github.com/christoomey/vim-tmux-navigator
is_vim='echo "#{pane_current_command}" | grep -iqE "(^|\/)g?(view|n?vim?)(diff)?$"'
bind -n C-h if-shell "$is_vim" "send-keys C-h" "select-pane -L"
bind -n C-j if-shell "$is_vim" "send-keys C-j" "select-pane -D"
bind -n C-k if-shell "$is_vim" "send-keys C-k" "select-pane -U"
bind -n C-l if-shell "$is_vim" "send-keys C-l" "select-pane -R"
bind -n C-\\ if-shell "$is_vim" "send-keys C-\\" "select-pane -l"

# Turn mouse on with leader m
bind m \
  set -g mouse on \;\
  display 'Mouse: ON'

# Turn mouse off with leader M
bind M \
  set -g mouse off \;\
  display 'Mouse: OFF'

# APPEARANCE
# ----------

# Colors
# See https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
set-option -g status-style fg=colour8,bg=colour0,default

# Status line format and colors
set -g status-left-length 40
set -g status-left "#[fg=colour8]Session: #S"
set -g status-right "#[fg=colour8][%m/%d/%Y %l:%M%p]"
set -g status-justify centre # center window list

# default window title fg, bg, and attribute
set-window-option -g window-status-style fg=colour8,bg=default,default

# current window title color
set-window-option -g window-status-current-style fg=colour2,bg=default

# pane border styles
set-option -g pane-border-style fg=colour10,bg=default
set-option -g pane-active-border-style fg=colour29,bg=colour254

# show pane title above pane
set -g pane-border-status top

# make background of non-active panes darker
set -g window-style fg=default,bg=colour15
set -g window-active-style fg=default,bg=colour231

# change color of status line when using prompt
set-option -g message-style fg=colour15,bg=colour1

# colors for pane numbers when using the display-panes command
set -g display-panes-active-colour colour33
set -g display-panes-colour colour166

# Reverse colors of selected text in pane when in copy or search mode, a bit
# intense but very easy to see
set -g mode-style fg=colour6,bg=default,reverse