Close lf window on inactivity (TMOUT-like feature)

[andis-sprinkis]

This may be a bit odd feature idea.

I like that some applications, open documents, browser tabs etc. that I have open but don't actually view or interact with anymore auto close after a while. Less workspace distractions and clutter. Out of sight, out of mind.

Different approaches in different programs

• Firefox - extensions like Auto Close Tabs
• Interactive Bash, ZSH - setting TMOUT variable to non-zero value in shell rc
• Neovim - chrisgrieser/nvim-early-retirement: Send buffers into early retirement by automatically closing them after x minutes of inactivity.

In the ZSH .zshrc I have set it like

  # inactivity timeout to exit after ~26 minutes
  TMOUT="1600"

  preexec() {
    # set inactivity timeout to exit after 90 minutes when user has issued a command, unless TMOUT is explicitly set to 0
    if [ "${TMOUT:-""}" != "0" ]; then
      TMOUT="5400"
    fi
  }

That makes my unused tmux panes close automatically.

Lf being a file manager seems to be in the same category of programs the user opens, uses for a bit to open some files and then kind of forgets about. It may be preferable to have an option that it closes itself on it's own. Thoughts?

[joelim-work]

I wonder if it's possible to implement this kind of thing externally. There is an on-select hook command that is invoked whenever a new file is selected by the cursor - this can be used as an approximate to determine activity by the user. And then it should be possible to use lf -remote "send <id> quit" to programatically quit lf.

[andis-sprinkis]

Something naive & mostly untested (EDIT: background process spam, need to figure something about killing previous timers, maybe keeping just 1 background process per id and sending a signal to reset the timer):

set user_quitaftersec 10
set user_quittimestamp ""
set user_quittimerpid ""

cmd quit-if-tmout &{{
  if [ "${lf_user_quittimestamp:-""}" ] && [ "$lf_user_quittimestamp" -le "$(date "+%s")" ] && [ "$lf_mode" = "normal" ]; then
    exec lf -remote "send ${id} quit"
  fi

  (
    sleep "$lf_user_quitaftersec"
    lf -remote "send ${id} quit-if-tmout"
  ) 1> "/dev/null" 2> "/dev/null" & disown
}}

cmd inc-quit-tmout &{{
  if [ "${lf_user_quittimerpid:-""}" ]; then
    set +e; kill -9 "$lf_user_quittimerpid"; set -e
  fi

  lf -remote "send ${id} set user_quittimestamp $(($(date "+%s") + lf_user_quitaftersec))"

  (
    sleep "$lf_user_quitaftersec"
    lf -remote "send ${id} quit-if-tmout"
  ) 1> "/dev/null" 2> "/dev/null" & disown
}}

cmd on-init &{{
  lf -remote "send ${id} inc-quit-tmout"
}}

cmd on-select &{{
  lf -remote "send ${id} inc-quit-tmout"
}}

cmd pre-cd &{{
  lf -remote "send ${id} inc-quit-tmout"
}}

cmd on-cd &{{
  lf -remote "send ${id} inc-quit-tmout"
}}

cmd on-focus-gained &{{
  lf -remote "send ${id} inc-quit-tmout"
}}

cmd on-focus-lost &{{
  lf -remote "send ${id} inc-quit-tmout"
}}

cmd on-quit &{{
  if [ "${lf_user_quittimerpid:-""}" ]; then
    kill -9 "$lf_user_quittimerpid"
  fi
}}