# [1]: https://wiki.archlinux.org/index.php/tmux
# [2]: https://gist.github.com/Lartza/6a7a62466a8a3e436234412d9b1c5066
# [3]: http://mutelight.org/practical-tmux
# [4]: https://github.com/tmux-plugins/tmux-sensible
# [5]: https://github.com/tmux-plugins/tmux-yank
# [6]: https://github.com/greymd/dotfiles/blob/333c46dab103d4316a83744dec28605dc2cbc4ab/.tmux.conf

# C-b is hella uncomfortable to press.
unbind C-b
set -g prefix C-j
bind -n M-j send-prefix

# Why launch a login shell?
set -g default-command "${SHELL}"

# Numbering starts at 1 instead of 0.
set -g base-index 1
set-window-option -g pane-base-index 1

# I'm not sure about this. Still, it's recommended by tmux-sensible, etc.
set -s escape-time 0

# Enable mouse support. You can now scroll inside panes. It automatically
# enters copy mode though, which you can exit by pressing q. Right click to
# bring up the emulator's context window won't work though, hold Shift for
# that.
set -g mouse on

# Default is only 2000 lines?!
set -g history-limit 50000

# Show tmux messages for a longer time (0.75 seconds is the default).
set -g display-time 4000

# Refresh the status line more often (every 15 second is the default).
set -g status-interval 5

# The following settings I don't totally understand/need, but they looked
# sensible enough, and they were recommended at least somewhere.

set-window-option -g monitor-activity on
set -g visual-activity on

set -g focus-events on

set-window-option -g aggressive-resize on

# Key bindings
# ------------

# R to reload this file.
bind R source-file ~/.tmux.conf \; display "Reloaded!"

# According to tmux-sensible, it's more natural to use default readline-like
# key bindings in the command prompt; I sorta agree.
set -g status-keys emacs

# Start new windows/panes in the current directory.
bind c new-window -c "#{pane_current_path}"
# The defaults for pane splitting are the dumbest bindings I've ever seen.
bind - split-window -v -c "#{pane_current_path}"
bind v split-window -h -c "#{pane_current_path}"

# Switch between panes quicker.
bind -n M-1 select-pane -t 1
bind -n M-2 select-pane -t 2
bind -n M-3 select-pane -t 3
bind -n M-4 select-pane -t 4
bind -n M-5 select-pane -t 5
bind -n M-6 select-pane -t 6
bind -n M-7 select-pane -t 7
bind -n M-8 select-pane -t 8
bind -n M-9 select-pane -t 9
bind -n M-0 select-pane -t 0

# Not quite so quick, but still OK.
bind -r C-h select-pane -L
bind -r C-j select-pane -D
bind -r C-k select-pane -U
bind -r C-l select-pane -R

# Switch between windows. Ctrl must be released.
#bind h next-window
#bind l previous-window
bind h select-window -t :-
bind l select-window -t :+

# Copy mode bindings
# ------------------

# I looked up useful bindings here[2] and there[5].

# Don't care if $EDITOR is not set up, I'm a vim guy.
set -g mode-keys vi

# This I'm unsure about.
bind Escape copy-mode
# This I'm sure about.
bind-key -T copy-mode-vi v send -X begin-selection

# Using the system clipboard.

if-shell 'uname | grep -q -F CYGWIN' {
  bind-key -T copy-mode-vi y send-keys -X copy-pipe-and-cancel 'cat > /dev/clipboard'
  bind-key -T copy-mode-vi Y send-keys -X copy-pipe-and-cancel 'tmux paste-buffer'
  bind-key -T copy-mode-vi M-y send-keys -X copy-pipe-and-cancel 'cat > /dev/clipboard; tmux paste-buffer'
  bind-key -T copy-mode-vi '!' send-keys -X copy-pipe-and-cancel {
    tr -d '\n' > /dev/clipboard
  }
  bind-key -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel 'cat > /dev/clipboard'
  bind-key -T root MouseDown2Pane run 'cat /dev/clipboard | tmux load-buffer - && tmux paste-buffer'

  bind-key ] run 'cat /dev/clipboard | tmux load-buffer - && tmux paste-buffer'
}

# The simple `xsel -i --clipboard` doesn't work, but `xsel -i -p && xsel -o -p
# | xsel -i -b`, described on [1] does. How fun!

if-shell 'uname | grep -q -F Linux && which xsel' {
  bind-key -T copy-mode-vi y send-keys -X copy-pipe-and-cancel 'xsel -i -p && xsel -o -p | xsel -i -b'
  bind-key -T copy-mode-vi Y send-keys -X copy-pipe-and-cancel 'tmux paste-buffer'
  bind-key -T copy-mode-vi M-y send-keys -X copy-pipe-and-cancel 'xsel -i -p && xsel -o -p | xsel -i -b; tmux paste-buffer'
  bind-key -T copy-mode-vi '!' send-keys -X copy-pipe-and-cancel {
    tr -d '\n' | xsel -i -p && xsel -o -p | xsel -i -b
  }
  bind-key -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel 'xsel -i -p && xsel -o -p | xsel -i -b'
  bind-key -T root MouseDown2Pane run 'xsel -o | tmux load-buffer - && tmux paste-buffer'

  bind-key ] run 'xsel -o | tmux load-buffer - && tmux paste-buffer'
}

# Appearance
# ----------

# Highlight active window panes/windows, might not work so well depending on
# your color scheme.
set-window-option -g window-status-current-style bg=red
set-window-option -g window-style bg=#000000
set-window-option -g window-active-style bg=#181818