dot_tmux.conf

# Remap prefix to ctrl-a for screen consistency.
    
    set -g prefix C-a
    unbind C-b
    bind-key C-a send-prefix

# Shell management.

    # Set the default shell, and set the default command to use our shell (this
    # means we source things properly, show the correct PS1 etc).
    set -g default-shell ${SHELL} 
    set -g default-command ${SHELL}

# Mouse management.

    # Enable mouse mode (tmux 2.1 and above)
    set -g mouse on

# Colour management (yikes) and alert management.

    # Use 256 colours.
    set-option -ga terminal-overrides ",xterm-256color:Tc"
    set-option -g default-terminal "screen-256color"

    # Enable visual alerts for windows. Hide bells/silence.
    set-window-option -g monitor-activity off # highlight active windows?
    set-option -g visual-activity off        # show a message on window activity?
    set-option -g visual-silence off
    set-option -g visual-bell off
    set-option -g bell-action none

# Nested session configuration.

    # Use ^b b to send the leader to a nested session. This means if you are
    # using tmux and then ssh into a tmux session (i.e. a nested session) you
    # can run commands in the nested session with ^B b <command>.
    bind-key b send-prefix

# Keyboard Management.

    # Don't wait for an escape sequence after hitting
    # Esc. fixes insert mode exit lag in vim.
    set -sg escape-time 0

# Clipboard / Copy / Paste
# Note: This is heavily OS dependent, which is why we have separate versions
# for OSX, Ubuntu etc. I'm trying out tmux-yank for this but it is still work in
# progress.

    set-option -g set-clipboard on
    bind P paste-buffer

    # Use vim keybindings in copy mode
    setw -g mode-keys vi

    # Setup 'v' begin/end selection as in Vim.
    bind-key -T copy-mode-vi v send-keys -X begin-selection
    bind-key -T copy-mode-vi C-v send-keys -X rectangle-toggle
    bind-key -T copy-mode-vi y send-keys -X copy-selection-and-cancel

# Pane and Window Management.

    # Open new panes and splits in the same working directory.
    bind c new-window -c "#{pane_current_path}"

    # Set the name of the window initially, but then don't let tmux change it.
    # The name can still be set at any time with Ctrl+a + ,
    set-option -g allow-rename off

    # Start windows and panes at 1.
    set -g base-index 1
    set -g pane-base-index 1
    set-window-option -g pane-base-index 1

    # When we add/remove windows, renumber them in sequential order.
    set -g renumber-windows on

    # Split panes using | and -
    bind | split-window -h -c "#{pane_current_path}"
    bind - split-window -v -c "#{pane_current_path}"

    # Ctrl+B h/l to swap windows left/right, i.e. moving the tabs around.
    bind-key h swap-window -t -1\; select-window -t -1
    bind-key l swap-window -t +1\; select-window -t +1

# Vim style pane selection

    bind h select-pane -L
    bind j select-pane -D 
    bind k select-pane -U
    bind l select-pane -R

# Use Alt-arrow keys without prefix key to switch panes

    bind -n M-Left select-pane -L
    bind -n M-Right select-pane -R
    bind -n M-Up select-pane -U
    bind -n M-Down select-pane -D

    # Meta + h/l to cycle through tabs.
    bind-key -n M-h previous-window
    bind-key -n M-l next-window

    # Enable focus events, which are needed to keep vim's focus events working when
    # vim is running inside tmux.
    set -g focus-events on

## Status bar design
# set -g status-utf8 on

    set -g status-justify left
    set -g status-bg default
    set -g status-interval 2

# List of plugins

    set -g @plugin 'tmux-plugins/tpm'
    set -g @plugin 'tmux-plugins/tmux-sensible'
    set -g @plugin 'tmux-plugins/tmux-yank'        # Cross-platform support for clipboard.
    set -g @plugin 'aserowy/tmux.nvim'
    set -g @plugin 'tmux-plugins/tmux-resurrect' # persist tmux sessions after computer restart
    set -g @plugin 'tmux-plugins/tmux-continuum' # automatically saves sessions for you every 15 minutes
 
# continuum-restore configuration

    ## Restore Vim sessions
    set -g @resurrect-strategy-vim 'session'
    ## Restore Neovim sessions
    set -g @resurrect-strategy-nvim 'session'
    ## Restore Panes
    set -g @resurrect-capture-pane-contents 'on'
    ## Restore last saved environment (automatically)
    set -g @continuum-restore 'on'

    set -g @continuum-boot 'on'
    
# Catppuccin theme

    set -g @plugin 'catppuccin/tmux'
    
    set -g @catppuccin_flavour 'mocha'
    set -g @catppuccin_window_right_separator "█ "
    set -g @catppuccin_window_number_position "right"
    set -g @catppuccin_window_middle_separator " | "
    
    set -g @catppuccin_window_default_fill "none"
    
    set -g @catppuccin_window_current_fill "all"
    
    set -g @catppuccin_status_modules "application session user host date_time"
    set -g @catppuccin_status_left_separator "█"
    set -g @catppuccin_status_right_separator "█"
    
    set -g @catppuccin_date_time_text "%Y-%m-%d %H:%M:%S"

# navigation

    set -g @tmux-nvim-navigation true
    set -g @tmux-nvim-navigation-cycle true
    set -g @tmux-nvim-navigation-keybinding-left 'C-h' 
    set -g @tmux-nvim-navigation-keybinding-down 'C-j' 
    set -g @tmux-nvim-navigation-keybinding-up 'C-k' 
    set -g @tmux-nvim-navigation-keybinding-right 'C-l' 
    
# resize

    set -g @tmux-nvim-resize true
    set -g @tmux-nvim-resize-step-x 2
    set -g @tmux-nvim-resize-step-y 2
    set -g @tmux-nvim-resize-keybinding-left 'C-M-h' 
    set -g @tmux-nvim-resize-keybinding-down 'C-M-j' 
    set -g @tmux-nvim-resize-keybinding-up 'C-M-k' 
    set -g @tmux-nvim-resize-keybinding-right 'C-M-l'

# todo manager
    bind -r D neww -c "#{pane_current_path}" "[[ -e TODO.md ]] && nvim TODO.md || nvim ~/TODO.md"

# clear screen 
    bind -n C-d clear-history

# Initialize TMUX plugin manager (keep this line at the very bottom of tmux.conf)

    run '~/.tmux/plugins/tpm/tpm'