.tmux.conf

# Remap <prefix> from <Ctrl-b> to <Ctrl-a>
set -g prefix C-a
unbind-key C-b
bind-key C-a send-prefix

# Make `<prefix> r` reload the config file
unbind-key r
bind-key r source-file ~/.tmux.conf

# Start windows numbering at 1
set -g base-index 1

# Renumber windows when a window is closed
set -g renumber-windows on

# Use Vim shortcuts
setw -g mode-keys vi

# Make pane numbering consistent with windows
setw -g pane-base-index 1

# Rename window to reflect current program
setw -g automatic-rename on

# Enable mouse support
set -g mouse on

# Increase scrollback buffer size
set -g history-limit 10000

# Enable true color
set -g default-terminal 'xterm-256color'
set -ga terminal-overrides ',*256col*:Tc'

# Split current window horizontally
bind-key - split-window -v

# Split current window vertically
bind-key | split-window -h

# Pane navigation
bind-key h select-pane -L  # Move left
bind-key j select-pane -D  # Move down
bind-key k select-pane -U  # Move up
bind-key l select-pane -R  # Move right

# Pane resizing
bind-key -r H resize-pane -L 2
bind-key -r J resize-pane -D 2
bind-key -r K resize-pane -U 2
bind-key -r L resize-pane -R 2

# Copy mode
bind-key -T copy-mode-vi v send-keys -X begin-selection
bind-key -T copy-mode-vi y send-keys -X copy-selection-and-cancel

# Connect tmux to the macOS clipboard service
if-shell -b 'command -v reattach-to-user-namespace &> /dev/null' {
  bind-key -T copy-mode MouseDragEnd1Pane send-keys -X copy-pipe-no-clear 'reattach-to-user-namespace pbcopy'
  bind-key -T copy-mode DoubleClick1Pane {
    select-pane
    send-keys -X select-word
    send-keys -X copy-pipe-no-clear 'reattach-to-user-namespace pbcopy'
  }
  bind-key -T copy-mode TripleClick1Pane {
    select-pane
    send-keys -X select-line
    send-keys -X copy-pipe-no-clear 'reattach-to-user-namespace pbcopy'
  }

  bind-key -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-no-clear 'reattach-to-user-namespace pbcopy'
  bind-key -T copy-mode-vi DoubleClick1Pane {
    select-pane
    send-keys -X select-word
    send-keys -X copy-pipe-no-clear 'reattach-to-user-namespace pbcopy'
  }
  bind-key -T copy-mode-vi TripleClick1Pane {
    select-pane
    send-keys -X select-line
    send-keys -X copy-pipe-no-clear 'reattach-to-user-namespace pbcopy'
  }
}

# Connect tmux to the Linux clipboard service
if-shell -b 'command -v xclip &> /dev/null' {
  bind-key -T copy-mode C-w send-keys -X copy-pipe-and-cancel 'xclip -selection clipboard -i > /dev/null'
  bind-key -T copy-mode M-w send-keys -X copy-pipe-and-cancel 'xclip -selection clipboard -i > /dev/null'

  bind-key -T copy-mode MouseDragEnd1Pane send-keys -X copy-pipe-no-clear 'xclip -selection clipboard -i > /dev/null'
  bind-key -T copy-mode DoubleClick1Pane {
    select-pane
    send-keys -X select-word
    send-keys -X copy-pipe-no-clear 'xclip -selection clipboard -i > /dev/null'
  }
  bind-key -T copy-mode TripleClick1Pane {
    select-pane
    send-keys -X select-line
    send-keys -X copy-pipe-no-clear 'xclip -selection clipboard -i > /dev/null'
  }

  bind-key -T copy-mode-vi C-j send-keys -X copy-pipe-and-cancel 'xclip -selection clipboard -i > /dev/null'
  bind-key -T copy-mode-vi Enter send-keys -X copy-pipe-and-cancel 'xclip -selection clipboard -i > /dev/null'

  bind-key -T copy-mode-vi y send-keys -X copy-pipe-and-cancel 'xclip -selection clipboard -i > /dev/null'

  bind-key -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-no-clear 'xclip -selection clipboard -i > /dev/null'
  bind-key -T copy-mode-vi DoubleClick1Pane {
    select-pane
    send-keys -X select-word
    send-keys -X copy-pipe-no-clear 'xclip -selection clipboard -i > /dev/null'
  }
  bind-key -T copy-mode-vi TripleClick1Pane {
    select-pane
    send-keys -X select-line
    send-keys -X copy-pipe-no-clear 'xclip -selection clipboard -i > /dev/null'
  }
}

# Window navigation
bind-key < {
  swap-window -t -1
  select-window -p
}
bind-key > {
  swap-window -t +1
  select-window -n
}

if-shell -b '[ -f ~/.tmux/plugins/tpm/tpm ]' {
  set -g @tpm_plugins ' \
    tmux-plugins/tpm \
    tmux-plugins/tmux-resurrect \
    Morantron/tmux-fingers \
  '
}

# User defined overrides
if-shell -b '[ -f ~/.tmux.conf.local ]' {
  source ~/.tmux.conf.local
}

# Initialize TMUX plugin manager
if-shell -b '[ -f ~/.tmux/plugins/tpm/tpm ]' {
  run-shell -b '~/.tmux/plugins/tpm/tpm'
}