.tmux.conf

# Set prefix to Ctrl-Space
# Important: the Ctrl-Space might not work on Mac because it's already binded by
# the system. Check the iTerm profile and more importantly: Preferences >
# Keyboard > Shortcuts. If present, select "Input sources" from the left sidebar
# and uncheck both boxes. Source: https://github.com/tmux/tmux/issues/457#issuecomment-357938515

unbind C-b
set -g prefix C-Space


# Bindings:
# - to see current bindings:
#   tmux list-keys

# Open new/split panes with the path of the current pane.
unbind-key c
bind-key c new-window -c '#{pane_current_path}'
unbind-key %
bind-key % split-window -h -c '#{pane_current_path}'
unbind-key '"'
bind-key '"' split-window -v -c '#{pane_current_path}'

# Vim-like key bindings for pane navigation (default uses cursor keys).
unbind h
bind h select-pane -L
unbind j
bind j select-pane -D
unbind k
bind k select-pane -U
unbind l
bind l select-pane -R

# Resizing (mouse also works).
unbind-key Left
bind-key -r Left resize-pane -L 5
unbind-key Right
bind-key -r Right resize-pane -R 5
unbind-key Down
bind-key -r Down resize-pane -D 5
unbind-key Up
bind-key -r Up resize-pane -U 5

# Intuitive window-splitting keys.
bind-key | split-window -h -c '#{pane_current_path}' # normally prefix-%
bind-key '\' split-window -h -c '#{pane_current_path}' # normally prefix-%
bind-key - split-window -v -c '#{pane_current_path}' # normally prefix-"

# Mouse can be used to select panes, select windows (by clicking on the status
# bar), resize panes. For default bindings see `tmux list-keys`.
set-option -g mouse on

# Stay in copy mode on drag end.
# (Would use `bind-key -T copy-mode-vi MouseDragEnd1Pane send-keys -X
# stop-selection` but it is a bit glitchy.)
unbind-key -T copy-mode-vi MouseDragEnd1Pane

# Scroll 3 lines at a time instead of default 5; don't extend dragged selections.
bind-key -T copy-mode-vi WheelUpPane select-pane\; send-keys -t'{mouse}' -X clear-selection\; send-keys -t'{mouse}' -X -N 3 scroll-up
bind-key -T copy-mode-vi WheelDownPane select-pane\; send-keys -t'{mouse}' -X clear-selection\; send-keys -t'{mouse}' -X -N 3 scroll-down

# Make double and triple click work outside of copy mode (already works inside it with default bindings).
bind-key -T root DoubleClick1Pane if-shell -Ft'{mouse}' '#{alternate_on}' "send-keys -M" "copy-mode -t'{mouse}'; send-keys -t'{mouse}' -X select-word"
bind-key -T root TripleClick1Pane if-shell -Ft'{mouse}' '#{alternate_on}' "send-keys -M" "copy-mode -t'{mouse}'; send-keys -t'{mouse}' -X select-line"


# Don't exit copy mode on double or triple click.
bind-key -T copy-mode-vi DoubleClick1Pane if-shell -Ft'{mouse}' '#{alternate_on}' "send-keys -M" "copy-mode -t'{mouse}'; send-keys -t'{mouse}' -X select-word"
bind-key -T copy-mode-vi TripleClick1Pane if-shell -Ft'{mouse}' '#{alternate_on}' "send-keys -M" "copy-mode -t'{mouse}'; send-keys -t'{mouse}' -X select-line"

# Slightly more useful width in "main-vertical" layout; enough room for 3-digit
# line number gutter in Vim + 80 columns of text + 1 column breathing room
# (default looks to be about 79).
set-option -w -g main-pane-width 85

set-option -g default-terminal "tmux-256color"
set-option -ga terminal-overrides ',xterm-256color:Tc'

set-option -g history-limit 10000

# Start window and pane numbering at 1, (0 is too hard to reach).
set-option -g base-index 1
set-window-option -g pane-base-index 1


# Don't wait for an escape sequence after seeing C-Space.
set-option -s escape-time 0

# Dynamically update iTerm tab and window titles.
set-option -g set-titles on

# Needed as on tmux 1.9 and up (defaults to off).
# Added in tmux commit c7a121cfc0137c907b7bfb.
set-option -g focus-events on

# But don't change tmux's own window titles.
set-option -w -g automatic-rename off


# Don't wrap searches; it's super confusing given tmux's reverse-ordering of
# position info in copy mode.
set-option -w -g wrap-search off

# - #S = session name
# - #T = pane title (~/.zshrc sets this to the last/current command)
set-option -g set-titles-string "#S > #T"


# Add : to the default list (" -_@") of word separators.
set-option -ga word-separators :/