Mouse scroll events

[revan]

Adds mouse.scrolled and mouse.scrolled.global.

Considerations:

• This currently captures only vertical scrolling -- horizontal scrolling still fires the event but with a zero delta. Follow-up would be to expose the horizontal delta as well and/or combine them into one signal.
• I think this only applies to mouse wheels (so no track pad, but we have proper gestures there).

mouse.scrolled I could see being useful for changing volume. mouse.scrolled.global I use to replicate the scroll feature of i3, where scrolling on the empty bar switches workspaces on the screen under mouse (not necessarily the focused screen).

Amended these dotfiles like so:

plugins/yabai.sh

mouse_scrolled() {
  if [ $1 -lt 0 ]; then
    id="$(yabai -m query --spaces --display $2 | jq 'sort_by(.index) | .[map(."is-visible") | index(true) - 1].index')" && yabai -m space --focus "${id}"
  elif [ $1 -gt 0 ]; then
    id="$(yabai -m query --spaces --display $2 | jq 'sort_by(.index) | reverse | .[map(."is-visible") | index(true) - 1].index')" && yabai -m space --focus "${id}"
  fi
}

case "$SENDER" in
  "mouse.clicked") mouse_clicked
  ;;
  "forced") exit 0
  ;;
  "window_focus") window_state 
  ;;
  "windows_on_spaces" | "space_change") windows_on_spaces
  ;;
  "mouse.scrolled.global") mouse_scrolled "$DELTA_VERT" "$DISPLAY"
esac

items/yabai.sh

sketchybar --add event window_focus            \
           --add event windows_on_spaces       \
           --add item yabai left               \
           --set yabai "${yabai[@]}"           \
           --subscribe yabai window_focus      \
                             space_change      \
                             windows_on_spaces \
                             mouse.clicked     \
                             mouse.scrolled.global

[FelixKratz]

Thats certainly a nice idea, I have made some changes to the PR:

• Remove the scroll_script, I don't think it is needed to have this property.
• Add the internal event codes
• Rename some variables and properties, i.e. the scroll delta variable is now SCROLL_DELTA
• Limit the rate at which the scroll events can fire, this is needed in order to not fork-bomb the system when having a fast scroll rate mouse.

Have a look at the changes and once you are happy I will merge.

[revan]

Looks lovely, thanks for the cleanup and quick review!