powertab.tmux

#!/bin/sh
# vim: foldmethod=marker

# Config options {{{
	# Define a list of config options that can be set by the user, using
	# `set -g @powertab-key val` in their tmux.conf to set `key` to `val`.
	options="
		powerline
		pathname
		foreground
		background
		statusline
		unfocustab_bg
		unfocustab_fg
		focustab_fg
		focustab_bg
		statuslineright_bg
		statuslineright_fg
		paneborder
		activepaneborder
	"
	
	# Import these config options from `tmux` to `sh`.
	for option in $options
	do
		export "$option"="$(tmux show-option -gv @powertab-$option 2>&1)"
	done
# }}}

# Theme colors {{{
	# Set the main theme colors. If the user has not
	# specified these, Solarized Light colors are used.
	if [ -z "$foreground" ]
	then
		foreground='#657b83'
	fi
	if [ -z "$background" ]
	then
		background='#fdf6e3'
	fi
	if [ -z "$statusline" ]
	then
		statusline='#1d1d1d'
	fi
	if [ -z "$unfocustab_bg" ]
	then
		unfocustab_bg='#363636'
	fi
	
	# Set optional theme colors. These should have sensible defaults
	# based on the colors above, but can be tweaked manually if wanted.
	if [ -z "$unfocustab_fg" ]
	then
		unfocustab_fg="$background"
	fi
	if [ -z "$focustab_bg" ]
	then
		focustab_bg="$background"
	fi
	if [ -z "$focustab_fg" ]
	then
		focustab_fg="$unfocustab_bg"
	fi
	if [ -z "$statuslineright_bg" ]
	then
		statuslineright_bg="$unfocustab_bg"
	fi
	if [ -z "$statuslineright_fg" ]
	then
		statuslineright_fg="$unfocustab_fg"
	fi
	
	# There are several different uses for the `paneborder` setting. Normally,
	# all borders have the same color, either the statusline color (default),
	# foreground (`fg`), or background (`bg`). However, you can set this to
	# `auto` to switch between `fg` and `bg` colors depending on pane activity,
	# or you can set `paneborder` and `activepaneborder` to colors manually;
	# these colors will then not be modified by the if-else structure below.
	if [ -z "$paneborder" ]
	then
		# Default: Pane borders match statusline.
		paneborder="$statusline"
		activepaneborder="$statusline"
	elif [ "$paneborder" = 'fg' ]
	then
		# Option: Pane border match foreground.
		paneborder="$foreground"
		activepaneborder="$foreground"
	elif [ "$paneborder" = 'bg' ]
	then
		paneborder="$background"
		activepaneborder="$background"
	elif [ "$paneborder" = 'auto' ]
	then
		paneborder="$background"
		activepaneborder="$foreground"
	fi
# }}}

# Powerline tabs {{{
	# Check whether to use powerline symbols. These generally look nicer
	# if you use a powerline font, but may not work everywhere.
	if [ "$powerline" = 'on' ]
	then
		powerline_l=""
		powerline_r=""
	else
		powerline_l=''
		powerline_r=''
	fi
	
	# Check whether to autorename tabs. You probably want to keep this 
	if [ "$pathname" = 'on' ]
	then
		tabname="#{?#{==:#{pane_current_path},$HOME},#W,#{b:pane_current_path}}"
	else
		tabname="#W"
	fi
	
	# Prepare tab design variables.
	tab_0l="#[fg=$statuslineright_fg,bg=$statuslineright_bg]"
	tab_1l="#[bg=$statusline,fg=$unfocustab_bg]$powerline_l#[bg=$unfocustab_bg,fg=$unfocustab_fg]"
	tab_1r="#[bg=$statusline,fg=$unfocustab_bg]$powerline_r"
	tab_2l="#[bg=$statusline,fg=$focustab_bg]$powerline_l#[bg=$focustab_bg,fg=$focustab_fg]"
	tab_2r="#[bg=$statusline,fg=$focustab_bg]$powerline_r"
# }}}

# Tmux settings {{{
	# Statusline (general).
	tmux set -g status-position top
	tmux set -g status-justify left
	tmux set-option -g status-style "bg=$statusline"
	
	# Statusline (left).
	tmux set -g status-left " "
	
	# Statusline (right).
	tmux set -g status-right-length 24
	tmux set -g status-right "$tab_0l #H#{?#{==:#S,0},,: #S} "
	
	# Statusline (center).
	tmux setw -g window-status-separator ""
	tmux set -g window-status-format "$tab_1l #I $tabname $tab_1r"
	tmux set -g window-status-current-format "$tab_2l #I $tabname $tab_2r"
	
	# Pane borders.
	tmux set -g pane-border-style "fg=$paneborder,bg=$background"
	tmux set -g pane-active-border-style "fg=$activepaneborder,bg=$background"
	
	# Pane contents.
	tmux set -g window-style "fg=$foreground,bg=$background"
	tmux set -g window-active-style "fg=$foreground,bg=$background"
# }}}