# Reload Tmux configuration
bind-key r source-file ~/.tmux.conf \; display-message "~/.tmux.conf reloaded"

# Enable Tmux's mouse mode.
#
# In iTerm, this mostly does what I want, in that it allows me to click on
# things to bring them into focus (windows, panes). It also handles scrolling
# more elegantly.
set-option -g mouse on

# Mouse mode isn't perfect. By default, ending a drag cancels the selection,
# which is a jarring on non-default behaviour. This makes sure this doesn't
# happen anymore.
unbind-key -T copy-mode MouseDragEnd1Pane

# Because we cancelled the mouse drag ending a selection, we don't have an
# easy and convenient way to make get back to normal. When using a GUI, a
# single click usually does the trick. This command restores that behaviour.
bind-key -T copy-mode MouseUp1Pane send-keys -X cancel

# Use the Vim yank mnemonic to commit a copy when in copy mode.
# I don't actually hit "y" to copy, though. In iTerm, I have Cmd+C set up
# to send the hexcode for y to the terminal, which means the normal macOS
# copy shortcut does the right thing, so long as I'm in Tmux.
bind-key -T copy-mode y send-keys -X copy-pipe "pbcopy"

# When I delete a window, relabel them automatically.
set-option -g renumber-windows on

# Pane switching. These interface with Vim to ensure that pane switching is
# both consistent and sensible.
#
# Borrowed from Chris Toomey: 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"

# When zooming a pane in a window, also zoom the vim split
bind-key z if-shell "$is_vim" "resize-pane -Z \; send-keys C-z" "resize-pane -Z"

# All pane and window creations use the same path as the current process,
# which I have found to be a good default.
#
# I don't typically hit <prefix>c to open a new window, I have that bound
# to Cmd+T in iTerm the same way I manage the clipboard. I also add the
# tab traversal shortcuts to move between Tmux windows.
bind-key c new-window -c "#{pane_current_path}"

# Backslash is the unshifted version of |
bind-key \ split-window -h -c '#{pane_current_path}'
# Ditto, hyphen is the unshifted version of _
bind-key - split-window -v -c '#{pane_current_path}'