How to implement toggling behaviour for preview (use same keybind to toggle preview command)

[tg0h]

I am trying to implement a toggle for the preview. If I press ctrl-g once, I intend to display a certain preview, say cat {}, If I press ctrl-g again, I want to display another preview, say bat {}. I am using a tmp file to store state.

I am unable to get this behaviour. The closest I got was to switch between different keybinds (eg ctrl-g, then ctrl-c, then ctrl-g) in the screenshot above.

[lime-desu]

Hello I've tried to do that, but It is not perfect, the way that you wanted it, though it does the job to change the preview.
The problem is:

• when pressing ctrl-g will change the preview into bat first, now pressing ctrl-g if the preview is on bat it will not change the preview So pressing ctrl-g sometimes doesn't work and that behavior will be kinda annoying. ( I don't know why but, I guess the logic or order is wrong I'm too lazy to figure that out xD) here's the code snippet btw:

fd . | fzf \
  --bind "ctrl-g:execute-silent(touch /tmp/testing; echo "bat" > /tmp/testing)+change-preview(
    if grep -q bat /tmp/testing; then 
      bat --color=always {} && echo "cat" > /tmp/testing;
    else
      cat {} && echo "bat" > /tmp/testing; fi)+refresh-preview"

// Don't mind this images xd ( I just uploaded it here to host the image and add this screenshot on the wiki page )

[tg0h]

thanks @lime-desu ... I did not know that there was a +refresh-preview action

The below is a minimal example of how to toggle a preview with the same keybind

#!/usr/bin/env zsh

ls | fzf \
  --bind "ctrl-g:change-preview(
  if [ -f /tmp/testing ]; then 
    cat {}; 
    rm -f /tmp/testing; 
  else 
    bat --color=always {}; 
    touch /tmp/testing; 
  fi
  )+refresh-preview"