tmux.conf

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##  _______________________________
## /\                              \
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##   |   / /_____ ___  __  ___  __ |
##   |  / __/ __ `__ \/ / / / |/_/ |
##   | / /_/ / / / / / /_/ />  <   |
##   | \__/_/ /_/ /_/\__,_/_/|_|   |
##   |                 -by m42nk   |
##   |   __________________________|_
##    \_/____________________________/
##
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## vim: ft=tmux fdm=marker fdl=0
#####################################

#####################################
## Variables
#####################################

_cfgDir="~/.config/tmux"
_cfgCustomDir="${_cfgDir}/custom"
_cfgScriptsDir="${_cfgDir}/scripts"

_confDefault="${_cfgDir}/defaults/v3.4.conf"
_confCurr="${_cfgDir}/tmux.conf"

#####################################
## Prefix
#####################################
unbind C-b
set -g prefix '`'
bind '`' send-prefix # send backtick if typed twice
set -g prefix2 C-b
bind 'C-b' send-prefix -2


#####################################
## Terminal Settings
#####################################

# MacOS ships with a very old ncurses and terminfo.
# If tmux-256color is not recognized in your mac, update terminfo.
# -- https://gist.github.com/bbqtd/a4ac060d6f6b9ea6fe3aabe735aa9d95
# -- https://ryantravitz.com/blog/2023-02-18-pull-of-the-undercurl/
set -g   default-terminal "tmux-256color" # TODO: check if setting this value to xterm-kitty will solve paste control codes issue (weird char when pasting)

set -gu default-command
set -g default-shell "$SHELL"

# TODO: use proper, next
set-option -ga terminal-overrides ',xterm-kitty:cnorm=\E[?12h\E[?25h'
# set -gas terminal-overrides "*:Tc" # true color support
# set -gas terminal-overrides "*:RGB" # true color support
# set -as  terminal-overrides ',*:Smulx=\E[4::%p1%dm'  # undercurl support
# set -as  terminal-overrides ',*:Setulc=\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m'  # underscore colours - needs tmux-3.0

## Extended keys (ctrl+enter, shift+enter, etc), required in tmux 3.5a
# https://github.com/tmux/tmux/wiki/Modifier-Keys#extended-keys
# set -s extended-keys on
# set -s extended-keys-format csi-u # for kitty
# set -as terminal-features ",*:extkeys"

#####################################
## General Options
#####################################

## Server options
set -sg focus-events on   # Enable focus-events inside tmux (focus on terminal window)
set -sg escape-time  0    # Reduce delay when pressing <Esc>
set -sg repeat-time  500  # How long tmux wait for repeatable (-r) bind-key

## Session options
set  -g detach-on-destroy off # Switch to other when session is closed (don't exit tmux)
set  -g history-limit 100000  # Increase scrollback buffer size
set  -g set-titles on         # Allow tmux to change terminal title
set  -g mouse on              # Enable mouse (e.g. to drag pane edge for resizing)

## Window options
set -wg wrap-search on               # Search wrap around
# set -wg monitor-activity on          # Highlight tmux window if it's update when out of focus; disabled, too noisy, nvim will always trigger
set -wg popup-border-lines rounded   # Make popup window border rounded

## Pane options
set -g scroll-on-clear on    # Scroll to bottom on clear

## Rename OS Window
set  -g set-titles on
set  -g set-titles-string "#S:#I:#W - tmux #{session_alerts}"


#####################################
## Numbering
#####################################
set  -g renumber-windows on    # Renumber windows when a window is closed
set  -g base-index 1           # Start windows numbering at 1
set -wg pane-base-index 1      # Start pane numbering at 1
## set  -g session-base-index 1 # <- This option doesn't exists, so we use hooks to do that (check below)


#####################################
## Clipboard
#####################################

## Enable clipboard
set -sg set-clipboard on

## Clipboard program on Linux
if -b 'command -v xsel' {
  set -s copy-command "xsel -i"
}

## Clipboard program on MacOS
if -b 'command -v pbcopy' {
  set -s copy-command 'pbcopy'
}


#####################################
## Pene related options
#####################################

set -wg pane-border-lines single     # Pane border style
set -wg pane-border-indicators both  # Use border color and arrow to indicate active

## Dim inactive pane
set -g window-style "bg=black"                        # Dim pane background
set -g window-active-style "bg=terminal"              # Transparent pane background (active)
set -wg pane-border-style "fg=brightblack,bg=black"   # Match inactive pane background
set -wg pane-active-border-style "fg=green,bg=black"  # TODO: can make 'Green' as primary color

## Pretty pane title
paneTitleHomeDir="󰋞 Home"
paneTitleOtherDir=" #{b:pane_current_path}"
isPanePathHome="#{==:#{pane_current_path},${HOME}}"
paneTitleDir="#{?$isPanePathHome,$paneTitleHomeDir,$paneTitleOtherDir}"
paneTitleDefaultFormat="#{pane_title}"
paneTitleFormat="$paneTitleDir 󰄾 #{pane_current_command}"
isPaneTitleDefault="#{==:#{pane_title},#{host}}"
set -g pane-border-format "[#P: #{?$isPaneTitleDefault,$paneTitleFormat,$paneTitleDefaultFormat}]"


#####################################
## Vim motion in copy-mode
#####################################

setw    -g  mode-keys     vi
bind    -T  copy-mode-vi  v      send  -X  begin-selection
bind    -T  copy-mode-vi  y      send  -X  copy-pipe-and-cancel
bind    -T  copy-mode-vi  'y'    send  -X  copy-selection
bind    -T  copy-mode-vi  'C-v'  send  -X  rectangle-toggle # <C-v><space> for block-selection mode


#####################################
## Status line
#####################################

source-file "${_cfgDir}/status.tmux.conf"


#####################################
## Command Alias
#####################################

set -s command-alias[100] rename-pane='select-pane -T'


#####################################
## Keybinding
## -r = keybinding is repeatable (can be pressed multiple time without prefix repeatedly)
#####################################

## Reload config
bind r run "\
tmux source '$_confDefault' '$_confCurr' 2>&1 && \
tmux display-message 'Config reloaded!' \
"

## Command prompt
bind ':' command-prompt


#####################################
## Keybinding - Pane Navigation
#####################################

## Vim-aware movement, vim should also be configured to be tmux-aware
## -- eg: https://github.com/christoomey/vim-tmux-navigator
## -- Detect if current pane is running vim programs (vim, nvim, vimdiff, etc)
_isVim="ps -o state= -o comm= -t '#{pane_tty}' | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
bind h if-shell "$_isVim" "send-keys C-w h" "select-pane -L"
bind j if-shell "$_isVim" "send-keys C-w j" "select-pane -D"
bind k if-shell "$_isVim" "send-keys C-w k" "select-pane -U"
bind l if-shell "$_isVim" "send-keys C-w l" "select-pane -R"

## Jump
bind F display-panes -d 0

#####################################
## Keybinding - Pane Manipulation
#####################################

## Toggle Pane Border
bind b set pane-border-status

## Create pane (Split window)
bind '\' if -F "#{window_zoomed_flag}" 'select-pane -l' 'split-window -h -c "#{pane_current_path}"'  # Backslash split vertical (`|` without shift)
bind -   if -F "#{window_zoomed_flag}" 'select-pane -l' 'split-window -v -c "#{pane_current_path}"'  # Minus split horizontal

## Move pane to new window
bind !   break-pane ';' display-message "Pane moved!"

## Zoom pane (toggle)
bind Enter resize-pane -Z

## Move pane (Mark-Join flow)
## -- Steps: mark pane with <prefix>m, move to desired session/window, join pane with <prefix><shift>J
bind m select-pane -m ';' display-message "#{?pane_marked,Mark,Unmark}ed pane: #P"
bind M select-pane -M # unmark
bind J join-pane -h

## Rename pane
bind > command-prompt -I "#{pane_title}" -p  'rename-pane:' 'select-pane -T "%%"'


#####################################
## Keybinding - Window Navigation
#####################################

## Default navigation
bind 1 select-window -t :=1
bind 2 select-window -t :=2
bind 3 select-window -t :=3
bind 4 select-window -t :=4
bind 5 select-window -t :=5

## Prev/Next Window (repeatable)
bind -r C-p   previous-window
bind -r C-n   next-window

## Search window by match
bind C-f command-prompt -p "match-window: " 'find-window -t %%'


#####################################
## Keybinding - Window Manipulation
#####################################

## Create window
bind c new-window -c "#{pane_current_path}"    # Create at the end of window list (in status bar)
bind C new-window -a -c "#{pane_current_path}" # Create next to current active window (in status bar)

## Change layout
bind -r Space next-layout       # Cycle window layout
bind -r C-Space previous-layout # Cycle window layout

## Rotate panes position
bind -r o rotate-window

# Move to last active window
bind -r Tab last-window

## Rename window
bind , command-prompt -I "#{window_name}" -p 'rename-window:' 'rename-window "%%"'

## Swap window
bind w switch-client -T swaping-window
bind -T swaping-window p swap-window -d -t -1 ';' switch-client -T swaping-window
bind -T swaping-window n swap-window -d -t +1 ';' switch-client -T swaping-window
bind -T swaping-window h swap-window -d -t -1 ';' switch-client -T swaping-window
bind -T swaping-window l swap-window -d -t +1 ';' switch-client -T swaping-window


#####################################
## Keybinding - Session Manipulation
#####################################

## Create session
bind N new-session  # Create new session

## Launcher
bind n display-popup -T "[Launcher]" -E -h '80%' -w '80%' "${_cfgScriptsDir}/launcher.sh"
bind C-n run "${_cfgScriptsDir}/sessionizer-rename-session.sh"

# Rename session
bind . command-prompt -I "#{session_name}" -p 'rename-session:' 'rename-session "%%"'


## TODO: unmodified

## Fuzzy chooser
bind i display-popup -E -h '80%' -w '80%' "${_cfgScriptsDir}/fuzzy-chooser.sh"

## Scratch
bind q run "DIR='#{pane_current_path}' ${_cfgScriptsDir}/popup-window.sh"

## Clear scrollback buffer (since we use scroll-on-clear)
bind C-l clear-history ';' display-message "Scrollback buffer cleared"

## Go into copy-mode-vi and start searching
bind / copy-mode ';' send-key ?

## Save scrollback buffer to a file
bind P command-prompt -p 'save history to filename:' -I '~/tmux.history' 'capture-pane -J -S -; save-buffer %1 ; delete-buffer'


#####################################
## Key menu
#####################################

## Delete/Detach/Kill
bind d display-menu -x 0 -y S -T "Delete/Detach/Kill" \
  "Window"                      w "kill-window -t #{window_id}" \
  "Session"                     s "kill-session -t #{session_id}" \
  "Pane"                        p "kill-pane -t #{pane_id}" \
  "Pane (quick)"                d "kill-pane -t #{pane_id}" \
  "Client (back to terminal)"   q "detach-client" \
  "Server"                      S "confirm-before -p 'Kill tmux server?' 'kill-server'" \
  "" \
  "Other window except current" W "kill-window -t #{window_id} -a" \
  "Other pane except current"   P "kill-pane -t #{pane_id} -a" \
  "Detached session"            D "run 'tmux list-sessions | grep -v attached | cut -d: -f1 |  xargs -t -n1 tmux kill-session -t'" \
  "" \
  "Long running (select)"            f "run 'tmux display-popup -E -h '80%' -w '80%' ${_cfgScriptsDir}/fuzzy-kill-long-running-process.sh'"

## Rename
bind R display-menu -x 0 -y S -T "Rename" \
  "Session"             s "command-prompt -I '#{session_name}' -p 'rename-session:' 'rename-session %%'" \
  "Window"              w "command-prompt -I '#{window_name}' -p 'rename-window:' 'rename-window %%'" \
  "Pane"                p "command-prompt -I '#{pane_title}' -p  'rename-pane:' 'select-pane -T %%'" \
  "Session match cwd"   d "rename-session #{b:pane_current_path}; attach -c #{b:pane_current_path}"


#####################################
## Keybind chording with key-table
#####################################

## Resize
bind C-r switch-client -T resize
bind -T resize -r x resize-pane -x 1 ';' switch-client -T resize
bind -T resize -r y resize-pane -y 1 ';' switch-client -T resize
bind -T resize -r H resize-pane -L  5 ';' switch-client -T resize
bind -T resize -r J resize-pane -D  5 ';' switch-client -T resize
bind -T resize -r K resize-pane -U  5 ';' switch-client -T resize
bind -T resize -r L resize-pane -R  5 ';' switch-client -T resize
bind -T resize -r h resize-pane -L 10 ';' switch-client -T resize
bind -T resize -r j resize-pane -D 10 ';' switch-client -T resize
bind -T resize -r k resize-pane -U 10 ';' switch-client -T resize
bind -T resize -r l resize-pane -R 10 ';' switch-client -T resize


#####################################
## Hooks
#####################################

## Renumber session
## -- Session name will be "$number_of_session + 1"
set-hook -g session-created[100] "run ${_cfgScriptsDir}/hook-renumber-sessions.sh"
set-hook -g session-closed[100]  "run ${_cfgScriptsDir}/hook-renumber-sessions.sh"

set-hook -g client-session-changed[100]  "run '${_cfgScriptsDir}/hook-last-session.sh save'"
set-hook -g session-closed[101]  "run ${_cfgScriptsDir}/hook-last-session.sh"

set-hook -g window-layout-changed[100] 'set-window -F pane-border-status "#{?#{==:#{window_panes},1},off,top}"'

# set-hook -g alert-activity[100] "run ${_cfgScriptsDir}/.sh"

#####################################
## Plugins
#####################################
if-shell "[[ -f ~/.tmux-jump/tmux-jump.tmux ]]" {
  set -g @jump-key 'f'

  run-shell ~/.tmux-jump/tmux-jump.tmux
}


#####################################
## Archives
#####################################

# ## Extended keys (ctrl+enter, shift+enter, etc)
# # NOTE: IDK if kitty support this inside tmux
# # https://github.com/tmux/tmux/wiki/Modifier-Keys#extended-keys
set -s extended-keys on
# set -as terminal-features ",*:extkeys"


#####################################
## TODO
#####################################
# - Use variable for colors for easy configuration

# Tmux line number
# https://unix.stackexchange.com/a/535010
# bind-key -T copy-mode-vi = split-window -h -p 90 'seq 24 -1 1;sleep 15'\;  swap-pane -dU