hammerspoon application toggler

init.lua

-- This hammerspoon config enables the possibility of using both normal keys and system keys to toggle applications

function create_hotkeys_service()
  local service = { event_handlers = {} }

  function service.bind_hotkey(modifiers, key, action)

    if hs.keycodes.map[key] then
      hs.hotkey.bind(modifiers, key, action)
      return
    end

    local down = true
    local flags = {}
    for i,mod in pairs(modifiers) do
      flags[mod] = true
    end

    if(service.event_handlers[key] == nil) then
      service.event_handlers[key] = {}
    end
    
    table.insert(service.event_handlers[key], {down, modifiers, action})
  end

  function service.start()
    service.proc = hs.eventtap.new({hs.eventtap.event.types.systemDefined}, function(event)
      local system_key = event:systemKey()
      local event_modifiers = event:getFlags()

      local handlers = service.event_handlers[system_key.key]
      if handlers then
        for i,handler in pairs(handlers) do
          local handler_down = handler[1]
          local handler_mods = handler[2]
          local handler_action = handler[3]
          if system_key.down == handler_down and event_modifiers:containExactly(handler_mods) then
            handler_action()
          end
        end
      end
    end)
    service.proc:start()
  end
  
  return service
end

function create_application_service()
  local application = {}
  function application.toggle_app(app)
    local app = hs.application.get(app)
    if app then
        if not app:mainWindow() then
            app:selectMenuItem({app, "New OS window"})
        elseif app:isFrontmost() then
            app:hide()
        else
            app:activate()
        end
    else
        hs.application.launchOrFocus(app)
    end
  end
  return application
end

mac = { 
  hotkeys = create_hotkeys_service(),
  application = create_application_service(),
}

mac.hotkeys.bind_hotkey({"cmd"}, "PLAY", function() mac.application.toggle_app('Spotify') end)
mac.hotkeys.bind_hotkey({},      "§",    function() mac.application.toggle_app("kitty") end)
mac.hotkeys.bind_hotkey({"cmd"}, "§",    function() mac.application.toggle_app("Google Chrome") end)
mac.hotkeys.bind_hotkey({"cmd"}, "M",    function() mac.application.toggle_app("Mail") end)
mac.hotkeys.bind_hotkey({"cmd"}, ".",    function() mac.application.toggle_app("VSCodium") end)

mac.hotkeys.start()

keybindings.json

[
    {
        "key": "alt+cmd+-",
        "command": "editor.action.jumpToBracket",
        "when": "editorTextFocus"
    },
    {
        "key": "shift+alt+cmd+-",
        "command": "editor.action.selectToBracket"
    }
]

kitty.conf

font_size 13.0
font_family      JetBrainsMonoNL Nerd Font Mono Regular
bold_font        JetBrainsMonoNL Nerd Font Mono ExtraBold
italic_font      JetBrainsMonoNL Nerd Font Mono Regular Italic
bold_italic_fon  JetBrainsMonoNL Nerd Font Mono ExtraBold Italic

window_padding_width 2
draw_minimal_borders yes
hide_window_decorations titlebar-only
map cmd+c copy_or_interrupt

map ctrl+shift+- no_op
map ctrl+shift++ no_op

background #1f1f1f