hammerspoon.init.lua

-- ~/.hammerspoon/init.lua
---@diagnostic disable-next-line: undefined-global
local hs = hs

hs.window.animationDuration = 0

-- https://github.com/Hammerspoon/hammerspoon/issues/3224#issuecomment-1294971600
local function axHotfix(win, fn)
  local axApp = hs.axuielement.applicationElement(win:application())
  local wasEnhanced = axApp.AXEnhancedUserInterface
  if wasEnhanced then
    axApp.AXEnhancedUserInterface = false
  end

  fn()

  if wasEnhanced then
    axApp.AXEnhancedUserInterface = true
  end
end

-- CenterOnScreen: Center new standard windows on the screen.
-- https://chatgpt.com/share/679c6282-322c-8007-9421-d7a0513d1a5f
hs.window.filter.default:subscribe(hs.window.filter.windowCreated, function(win)
  print("[CenterOnScreen] Window created. App: " .. (win:application():bundleID() or "unknown"))

  -- if win:application():bundleID() == "com.microsoft.VSCode" then return end
  if win:application():bundleID() == "org.hammerspoon.Hammerspoon" then return end

  if not win:isStandard() then return end
  if not win:isMaximizable() then return end
  if win:tabCount() ~= nil and win:tabCount() > 1 then return end
  if not win:application():isFrontmost() then return end

  -- Skip centering if window is aligned to an edge.
  local winFrame = win:frame() -- excludes menu bar and dock areas!
  local screenFrame = win:screen():frame()
  local aligned = {
    left = (winFrame.x == screenFrame.x),
    right = (winFrame.x + winFrame.w == screenFrame.x + screenFrame.w),
    top = (winFrame.y == screenFrame.y),
    bottom = (winFrame.y + winFrame.h == screenFrame.y + screenFrame.h)
  }
  if aligned.left or aligned.right or aligned.top or aligned.bottom then
    print("[CenterOnScreen] Window is edge-aligned, skipping centering")
    return
  end

  axHotfix(win, function()
    win:centerOnScreen(nil, true)
  end)
end)

-- QuitFinder: Quit Finder when it's backgrounded with no standard windows.
QuitFinderTimer = hs.timer.new(5, function()
  local Finder = (hs.application.applicationsForBundleID("com.apple.finder"))[1]
  if not Finder then return end

  -- Count only standard windows, ignoring the Desktop window.
  local windowCount = 0
  for _, window in ipairs(Finder:allWindows()) do
    if window:isStandard() then
      windowCount = windowCount + 1
    end
  end

  print("[QuitFinder] Finder has " .. windowCount .. " standard windows and is " ..
    (Finder:isFrontmost() and "frontmost" or "backgrounded") .. ".")
  if windowCount == 0 and not Finder:isFrontmost() then
    print("[QuitFinder] Finder is backgrounded with no windows, quitting.")
    Finder:kill()
  end
end)
-- QuitFinderTimer:start() -- https://github.com/Hammerspoon/hammerspoon/issues/1942#issuecomment-430450705