.tmux.conf

# Add truecolor support
set-option -ga terminal-overrides ",xterm-256color:Tc"
# Default terminal is 256 colors
set -g default-terminal "screen-256color"

# 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|l?n?vim?x?|fzf)(diff)?$'"
bind-key -n 'C-Left' if-shell "$is_vim" 'send-keys C-Left'  'select-pane -L'
bind-key -n 'C-Down' if-shell "$is_vim" 'send-keys C-Down'  'select-pane -D'
bind-key -n 'C-Up' if-shell "$is_vim" 'send-keys C-Up'  'select-pane -U'
bind-key -n 'C-Right' if-shell "$is_vim" 'send-keys C-Right'  'select-pane -R'
tmux_version='$(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-Left' select-pane -L
bind-key -T copy-mode-vi 'C-Down' select-pane -D
bind-key -T copy-mode-vi 'C-Up' select-pane -U
bind-key -T copy-mode-vi 'C-Right' select-pane -R
bind-key -T copy-mode-vi 'C-\' select-pane -l

# Pane Resizing
bind-key -r -T prefix       C-Up              resize-pane -U
bind-key -r -T prefix       C-Down            resize-pane -D
bind-key -r -T prefix       C-Left            resize-pane -L
bind-key -r -T prefix       C-Right           resize-pane -R