setw -g xterm-keys on
set -g default-terminal "screen-256color"
set-option -g prefix C-a
bind-key C-a last-window
set-window-option -g mode-keys vi
set -s escape-time 50

#######################################
# MOUSE SCROLL WHEEL

# Make mouse useful in copy mode
setw -g mouse on

# https://github.com/tmux/tmux/issues/1320#issuecomment-381952082
# Emulate scrolling by sending up and down keys if these commands are running in the pane
tmux_commands_with_legacy_scroll="nano less more man git"

bind-key -T root WheelUpPane \
	if-shell -Ft= '#{?mouse_any_flag,1,#{pane_in_mode}}' \
		'send -Mt=' \
		'if-shell -t= "#{?alternate_on,true,false} || echo \"#{tmux_commands_with_legacy_scroll}\" | grep -q \"#{pane_current_command}\"" \
			"send -t= Up Up Up" "copy-mode -et="'

bind-key -T root WheelDownPane \
	if-shell -Ft = '#{?pane_in_mode,1,#{mouse_any_flag}}' \
		'send -Mt=' \
		'if-shell -t= "#{?alternate_on,true,false} || echo \"#{tmux_commands_with_legacy_scroll}\" | grep -q \"#{pane_current_command}\"" \
			"send -t= Down Down Down" "send -Mt="'

# copy selection to X windows clipboard
#set -g set-clipboard off
bind-key -T copy-mode-vi v send -X begin-selection
bind-key -T copy-mode-vi y send-keys -X copy-pipe-and-cancel "xclip -i -sel clip > /dev/null"

##########################################
# TERMINAL EMULATOR TITLES
set -g set-titles on
#set -g set-titles-string "#(tmux ls | awk -F: '{print $1}' | xargs | sed 's/\ / | /g')"

# Smart pane switching with awareness of Vim splits.
# See: https://github.com/christoomey/vim-tmux-navigator
is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
bind-key -n C-h if-shell "$is_vim" "send-keys C-h"  "select-pane -L"
bind-key -n C-j if-shell "$is_vim" "send-keys C-j"  "select-pane -D"
bind-key -n C-k if-shell "$is_vim" "send-keys C-k"  "select-pane -U"
bind-key -n C-l if-shell "$is_vim" "send-keys C-l"  "select-pane -R"
bind-key -n C-\ if-shell "$is_vim" "send-keys C-\\" "select-pane -l"
bind-key -T copy-mode-vi C-h select-pane -L
bind-key -T copy-mode-vi C-j select-pane -D
bind-key -T copy-mode-vi C-k select-pane -U
bind-key -T copy-mode-vi C-l select-pane -R
bind-key -T copy-mode-vi C-\ select-pane -l