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# http://tmux.github.io/
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

provide-module tmux %{

# ensure we're running under tmux
evaluate-commands %sh{
    [ -z "${kak_opt_windowing_modules}" ] || [ -n "$TMUX" ] || echo 'fail tmux not detected'
}

define-command -hidden -params 2.. tmux-terminal-impl %{
    evaluate-commands %sh{
        tmux=${kak_client_env_TMUX:-$TMUX}
        if [ -z "$tmux" ]; then
            echo "fail 'This command is only available in a tmux session'"
            exit
        fi
        tmux_args="$1"
        if [ "${1%%-*}" = split ]; then
            tmux_args="$tmux_args -t ${kak_client_env_TMUX_PANE}"
        elif [ "${1%% *}" = new-window ]; then
            session_id=$(tmux display-message -p -t ${kak_client_env_TMUX_PANE} '#{session_id}')
            tmux_args="$tmux_args -t $session_id"
        fi
        shift
        # ideally we should escape single ';' to stop tmux from interpreting it as a new command
        # but that's probably too rare to care
        if [ -n "$TMPDIR" ]; then
            TMUX=$tmux tmux $tmux_args env TMPDIR="$TMPDIR" "$@"
        else
            TMUX=$tmux tmux $tmux_args "$@"
        fi
    }
}

define-command tmux-terminal-vertical -params 1.. -docstring '
tmux-terminal-vertical <program> [<arguments>]: create a new terminal as a tmux pane
The current pane is split into two, top and bottom
The program passed as argument will be executed in the new terminal' \
%{
    tmux-terminal-impl 'split-window -v' %arg{@}
}
complete-command tmux-terminal-vertical shell

define-command tmux-terminal-horizontal -params 1.. -docstring '
tmux-terminal-horizontal <program> [<arguments>]: create a new terminal as a tmux pane
The current pane is split into two, left and right
The program passed as argument will be executed in the new terminal' \
%{
    tmux-terminal-impl 'split-window -h' %arg{@}
}
complete-command tmux-terminal-horizontal shell

define-command tmux-terminal-window -params 1.. -docstring '
tmux-terminal-window <program> [<arguments>]: create a new terminal as a tmux window
The program passed as argument will be executed in the new terminal' \
%{
    tmux-terminal-impl 'new-window' %arg{@}
}
complete-command tmux-terminal-window shell

define-command tmux-focus -params ..1 -docstring '
tmux-focus [<client>]: focus the given client
If no client is passed then the current one is used' \
%{
    evaluate-commands %sh{
        if [ $# -eq 1 ]; then
            printf "evaluate-commands -client '%s' focus" "$1"
        elif [ -n "${kak_client_env_TMUX}" ]; then
            # select-pane makes the pane active in the window, but does not select the window. Both select-pane
            # and select-window should be invoked in order to select a pane on a currently not focused window.
            TMUX="${kak_client_env_TMUX}" tmux select-window -t "${kak_client_env_TMUX_PANE}" \; \
                                               select-pane   -t "${kak_client_env_TMUX_PANE}" > /dev/null
        fi
    }
}
complete-command -menu tmux-focus client

## The default behaviour for the `new` command is to open an horizontal pane in a tmux session
alias global focus tmux-focus

}