.tmux.conf

# Set shell
set-option -g default-shell /bin/fish

# Remap C-b to C-a 
unbind C-b
set-option -g prefix C-a
bind-key C-a send-prefix

# Reload keybind
bind-key r source-file ~/.tmux.conf \; display-message "~/.tmux.conf reloaded"

# Split mappings for panes
bind s split-window -v -c "#{pane_current_path}"
bind i split-window -h -c "#{pane_current_path}"
bind c new-window -c "#{pane_current_path}"
unbind '"'
unbind %

# Choose
bind j choose-tree

# 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 M-h if-shell "$is_vim" 'send-keys M-h' 'resize-pane -L 3'
bind-key -n M-j if-shell "$is_vim" 'send-keys M-j' 'resize-pane -D 3'
bind-key -n M-k if-shell "$is_vim" 'send-keys M-k' 'resize-pane -U 3'
bind-key -n M-l if-shell "$is_vim" 'send-keys M-l' 'resize-pane -R 3'

tmux_version='$(tmux -V | sed -En "s/^tmux ([0-9]+(.[0-9]+)?).*/\1/p")'
if-shell -b '[ "$(echo "$tmux_version < 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\'  'select-pane -l'"
if-shell -b '[ "$(echo "$tmux_version >= 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\\\'  'select-pane -l'"

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-key -T copy-mode-vi 'C-\' select-pane -l

set -s escape-time 0

# Start windows at 1 instead of 0 for ease of 
# number row
set -g base-index 1
set -g pane-base-index 1

######################
### DESIGN CHANGES ###
######################

# Disable bell (in tmux)
set -g visual-activity off
set -g visual-bell off
set -g visual-silence off
setw -g monitor-activity off
set -g bell-action any

# modes
setw -g clock-mode-colour colour166
setw -g mode-style 'fg=colour1 bg=colour236 bold'

# panes
set -g pane-border-style 'fg=colour16 bg=colour238'
set -g pane-active-border-style 'bg=colour16 fg=colour166'

# messages
set -g message-style 'fg=colour137 bg=colour235 bold'

# True Colors Support
set -g default-terminal "tmux-256color"
set -ga terminal-overrides ",*256col*:Tc"

set -g mouse on

set-option -g focus-events on

######################
###### Theming #######
######################

run-shell "~/.theme.tmux"