tmux.conf

# Tmux Configuration
# Author: Binoy Manoj
# GitHub: https://github.com/binoymanoj

# Install tpm (if not installed already) - tmux plugin manager
# git clone https://github.com/tmux-plugins/tpm ~/.config/tmux/plugins/tpm

# Reload config file
bind r source-file ~/.config/tmux/tmux.conf \; display-message "Config Reloaded!"

# prefix + I for installing newly added plugin 

# Prefix CTRL+a (default: CTRL+b)
# unbind C-b
# set-option -g prefix C-a
# bind C-a send-prefix

# Set terminal color support
set -g default-terminal "tmux-256color"
set-option -sa terminal-features ',xterm-256color:RGB'

set -g mouse on              # Enable mouse support
set -g focus-events on       # Enable focus events for better Vim integration
set -g set-clipboard on      # Enable system clipboard
set -g detach-on-destroy off # Don't exit from tmux when closing a session

# start window numbering from 1 instead of 0
set -g base-index 1
set -g pane-base-index 1
set -g renumber-windows on

# Enable terminal cursor shape changes
set-option -g terminal-overrides ',*:Ss=\E[%p1%d q:Se=\E[ q'

# Default to a block cursor (normal mode)
set -g @normal_cursor "\e[2 q"  # Block cursor
set -g @insert_cursor "\e[6 q"  # Line cursor

# Use Zsh's vi mode hooks
setw -g mode-keys vi

# Detect Zsh mode changes and update the cursor
bind-key -T vi-command Escape run-shell "printf '\e[2 q'"
bind-key -T vi-insert Escape run-shell "printf '\e[2 q'"
bind-key -T vi-insert Enter run-shell "printf '\e[6 q'"

# Vim-like copy mode bindings
# prefix + [ - to get into moving around mode in tmux then select using v and copy using y
bind-key -T copy-mode-vi 'v' send -X begin-selection
bind-key -T copy-mode-vi 'y' send -X copy-selection-and-cancel
bind-key -T copy-mode-vi 'r' send -X rectangle-toggle

# Copy to system clipboard 
bind-key -T copy-mode-vi 'y' send -X copy-pipe-and-cancel 'xclip -in -selection clipboard'

# Session Rename using Prefix + R
bind R command-prompt -I "#{session_name}" "rename-session '%%'"

# Set prefix key
# unbind C-b               # Unbind default prefix
# set -g prefix C-Space    # Set CTRL+SPACE as prefix

# Unbind existing pane navigation keys
unbind h
unbind j
unbind k
unbind l

# Use Ctrl + h/j/k/l for pane switching
# bind -n C-h select-pane -L
# bind -n C-j select-pane -D
# bind -n C-k select-pane -U
# bind -n C-l select-pane -R

# Ctrl is overlapping with Nvim switch split keybindings so, ALT instead
# bind -n M-h select-pane -L
# bind -n M-j select-pane -D
# bind -n M-k select-pane -U
# bind -n M-l select-pane -R

# Switch between windows with Ctrl + 1/2/3.... (not working with CTRL, so config with alt+1/2/3.... below)
# bind -n C-0 select-window -t :0
# bind -n C-1 select-window -t :1
# bind -n C-2 select-window -t :2
# bind -n C-3 select-window -t :3
# bind -n C-4 select-window -t :4
# bind -n C-5 select-window -t :5
# bind -n C-6 select-window -t :6
# bind -n C-7 select-window -t :7
# bind -n C-8 select-window -t :8
# bind -n C-9 select-window -t :9

# Switch between windows with Alt + 1/2/3....
bind -n M-0 select-window -t :0
bind -n M-1 select-window -t :1
bind -n M-2 select-window -t :2
bind -n M-3 select-window -t :3
bind -n M-4 select-window -t :4
bind -n M-5 select-window -t :5
bind -n M-6 select-window -t :6
bind -n M-7 select-window -t :7
bind -n M-8 select-window -t :8
bind -n M-9 select-window -t :9

# Splitting panes
bind | split-window -h -c "#{pane_current_path}"
bind \\ split-window -v -c "#{pane_current_path}"

# Vim keys to resize pane
bind -r h resize-pane -L 5
bind -r j resize-pane -D 5
bind -r k resize-pane -U 5
bind -r l resize-pane -R 5
bind -r m resize-pane -Z # to maximize current pane

# Utilities like sessionizer, open pdf and others
# bind-key f display-popup -E -w 80% -h 80% "~/.config/scripts/tmux-sessionizer.sh"      # find and open in current session with popup
# bind-key F display-popup -E -w 80% -h 80% "~/.config/scripts/tmux-sessionizer.sh new"  # find and open in a new session with popup
# bind-key o display-popup -E -w 80% -h 80% "~/.config/scripts/tmux-open-pdf.sh"              # open pdf with popup
bind-key g run-shell "~/.config/scripts/tmux-open-github.sh"                             # opens github repository of the current project

# Smaller popup for sessionizer and open pdf
bind-key f display-popup -E -w 60% -h 60% "~/.config/scripts/tmux-sessionizer.sh"
bind-key F display-popup -E -w 60% -h 60% "~/.config/scripts/tmux-sessionizer.sh new"
bind-key -r H run-shell "~/.config/scripts/tmux-sessionizer.sh ~"                         # go home in new window
bind-key o display-popup -E -w 60% -h 60% -x C -y C "~/.config/scripts/tmux-open-pdf.sh"
bind-key s display-popup -E -w 80% -h 80% "~/.config/scripts/tmux-session-manager.sh"

# Centered smaller popup
# bind-key f display-popup -E -w 70% -h 70% -x C -y C "~/.config/scripts/tmux-sessionizer.sh"
# bind-key F display-popup -E -w 70% -h 70% -x C -y C "~/.config/scripts/tmux-sessionizer.sh new"
# bind-key o display-popup -E -w 70% -h 70% -x C -y C "~/.config/scripts/tmux-open-pdf.sh"

# TPM (Tmux Plugin Manager) 
set -g @plugin 'tmux-plugins/tpm'

set -g @plugin 'tmux-plugins/tmux-sensible'
set -g @plugin 'christoomey/vim-tmux-navigator'
set -g @plugin 'tmux-plugins/tmux-resurrect' # persist session after restarting computer
set -g @plugin 'tmux-plugins/tmux-continuum' # Automatically saves session every 15 mins
set -g @plugin 'thewtex/tmux-mem-cpu-load'   # for cpu and memory usage in statusline
# set -g @plugin 'binoymanoj/tmux-zenflow'     # Zen workflow plugin (sessionizer & open pdf)

set -g @resurrect-capture-pane-contents 'on'
set -g @continuum-restore 'on'
set -g @resurrect-save-shell-history 'on'

# =============================================
# MINIMAL THEME CONFIGURATION
# =============================================

# Define colors
BG_COLOR="#1A1D23"
ACTIVE_COLOR="#b4befe"
INACTIVE_COLOR="#6c7086"
TEXT_COLOR="#cdd6f4"
ACCENT_COLOR="#b4befe"

# Basic status bar setup
set -g status on
set -g status-position bottom
set -g status-interval 3
set -g status-justify left

# Status bar colors and style
set -g status-style "bg=$BG_COLOR,fg=$TEXT_COLOR"
set -g status-left-length 100
set -g status-right-length 100

# Pane borders
set -g pane-border-style "fg=#44475a"
set -g pane-active-border-style "fg=$ACTIVE_COLOR"

# Message style
set -g message-style "bg=$BG_COLOR,fg=$TEXT_COLOR,bold"
set -g message-command-style "bg=$BG_COLOR,fg=$TEXT_COLOR,bold"

# Window status format - using dots instead of asterisks
set -g window-status-format "#[fg=$INACTIVE_COLOR,bg=$BG_COLOR] #I:#W "
set -g window-status-current-format "#[fg=$ACTIVE_COLOR,bg=$BG_COLOR,bold] #I:#W "

# Window status separator
set -g window-status-separator ""

# Status left (session name with minimal styling)
set -g status-left "#[fg=$ACCENT_COLOR,bold]  #S #[fg=$INACTIVE_COLOR]│ "

# Status right (current path and time)
# set -g status-right "#[fg=$TEXT_COLOR] #(echo #{pane_current_path} | sed \"s:^$HOME:~:\") #[fg=$INACTIVE_COLOR]│ #[fg=$ACCENT_COLOR]#(cat /sys/class/power_supply/BAT*/capacity 2>/dev/null || echo 'N/A')% #[fg=$INACTIVE_COLOR]│ #[fg=$ACTIVE_COLOR,bold]%I:%M %p "

# Status right (CPU %, RAM %, Battery %, Date)
set -g status-right "\
#[fg=$ACCENT_COLOR] #[fg=$TEXT_COLOR]#([ #{pane_current_path} = $HOME ] && echo '~' || basename #{pane_current_path}) \
#[fg=$INACTIVE_COLOR]│ \
#[fg=$ACCENT_COLOR] #[fg=$TEXT_COLOR]#(free | awk '/^Mem/ { printf(\"%.0f%%\", $3/$2 * 100 - 0.5) }' ) \
#[fg=$INACTIVE_COLOR]│ \
#[fg=$ACCENT_COLOR] #[fg=$TEXT_COLOR]#(date +%d) \
#[fg=$INACTIVE_COLOR]│ \
#[fg=$ACCENT_COLOR] #[fg=$TEXT_COLOR]#(date +%H:%M) \
#[fg=$INACTIVE_COLOR]│ \
#[fg=$ACCENT_COLOR] #[fg=$TEXT_COLOR]#(cat /sys/class/power_supply/BAT*/capacity 2>/dev/null || echo 'N/A')% "

# [fg=$ACCENT_COLOR] #[fg=$TEXT_COLOR]#(date +%I:%M\ %p) \ for 12 hour format 

# Copy mode styling
set -g mode-style "bg=$ACTIVE_COLOR,fg=$BG_COLOR"

# Clock mode
set -g clock-mode-colour "$ACTIVE_COLOR"
set -g clock-mode-style 24

# Initialize TPM (keep this line at the very bottom)
run '~/.tmux/plugins/tpm/tpm'