i3wm-focus

#!/usr/bin/env bash

# https://github.com/maxdevjs/i3-focus.sh

focus_number="99"
width_perc="50"
max_width="800"
height_perc="90"
max_height="1024"

enable_focus_mode() {
  w=$(( $2 * width_perc / 100 ))
  h=$(( $3 * height_perc / 100 ))
  wu=$(( w < max_width ? w : max_width ))
  hu=$(( h < max_height ? h : max_height ))

  workspace_focus_name=$"${focus_number}:${1}"

  i3-msg "move container to workspace \"${workspace_focus_name}\" workspace \"${workspace_focus_name}\" floating enable"
  i3-msg resize set width "${wu}" && i3-msg resize set height "${hu}" && i3-msg move position center

  # Simple Polybar support
  polybar-msg cmd toggle
}

disable_focus_mode() {
  workspace_original_name=$(</tmp/i3-focus.tmp)
  i3-msg "move container to workspace \"${workspace_original_name}\" workspace \"${workspace_original_name}\" floating disable"
  rm /tmp/i3-focus.tmp

  # Simple Polybar support
  polybar-msg cmd toggle
}

main() {
  workspace_current_name=$(i3-msg -t get_workspaces | jq -r '.[] | select(.focused==true).name')
  if [[ $workspace_current_name =~ "99" ]]
  then
    # Already focused. Going to exit from this state
    disable_focus_mode
  else
    # Out of focus, going back to it
    workspaces=$(i3-msg -t get_workspaces)
    workspace_current_num=$(i3-msg -t get_workspaces | jq -r '.[] | select(.focused==true).num')
    if [[ ! $workspace_current_num =~ "99" && $workspaces =~ "99" ]]
    then
      workspace_focus_name=$(i3-msg -t get_workspaces | jq -r '.[] | select(.num==99).name')
      i3-msg workspace $workspace_focus_name
    else
      # Activating focus
      workspace_original_name=$(i3-msg -t get_workspaces | jq -r '.[] | select(.focused==true).name')
      echo $workspace_original_name > /tmp/i3-focus.tmp
      enable_focus_mode \
      "$(i3-msg -t get_workspaces | jq -r '.[] | select(.focused==true).name')" \
      "$(i3-msg -t get_workspaces | jq -r '.[] | select(.focused==true).rect.width')" \
      "$(i3-msg -t get_workspaces | jq -r '.[] | select(.focused==true).rect.height')"
    fi
  fi
}

main