hammerspoon-init.lua

-- credit: https://spinscale.de/posts/2016-11-08-creating-a-productive-osx-environment-hammerspoon.html

--[[ function factory that takes the multipliers of screen width
and height to produce the window's x pos, y pos, width, and height ]]
function baseMove(x, y, w, h)
  return function()
      local win = hs.window.focusedWindow()
      local f = win:frame()
      local screen = win:screen()
      local max = screen:frame()

      -- add max.x so it stays on the same screen, works with my second screen
      f.x = max.w * x + max.x
      f.y = max.h * y
      f.w = max.w * w
      f.h = max.h * h
      win:setFrame(f, 0)
  end
end

-- feature spectacle/another window sizing apps
hs.hotkey.bind({'ctrl', 'alt', 'cmd'}, 'Left', baseMove(0, 0, 0.5, 1))
hs.hotkey.bind({'ctrl', 'alt', 'cmd'}, 'Right', baseMove(0.5, 0, 0.5, 1))
hs.hotkey.bind({'ctrl', 'alt', 'cmd'}, 'Down', baseMove(0, 0.5, 1, 0.5))
hs.hotkey.bind({'ctrl', 'alt', 'cmd'}, 'Up', baseMove(0, 0, 1, 0.5))
hs.hotkey.bind({'ctrl', 'alt', 'cmd'}, '1', baseMove(0, 0, 0.5, 0.5))
hs.hotkey.bind({'ctrl', 'alt', 'cmd'}, '2', baseMove(0.5, 0, 0.5, 0.5))
hs.hotkey.bind({'ctrl', 'alt', 'cmd'}, '3', baseMove(0, 0.5, 0.5, 0.5))
hs.hotkey.bind({'ctrl', 'alt', 'cmd'}, '4', baseMove(0.5, 0.5, 0.5, 0.5))
hs.hotkey.bind({'ctrl', 'alt', 'cmd'}, 'M', hs.grid.maximizeWindow)

hs.hotkey.bind({'ctrl', 'alt', 'cmd'}, 'N', function()
  local focusedWindow = hs.window.focusedWindow()
  local focusedScreenFrame = focusedWindow:screen():frame()
  local nextScreenFrame = focusedWindow:screen():next():frame()
  local windowFrame = focusedWindow:frame()

  windowFrame.x = ((((windowFrame.x - focusedScreenFrame.x) / focusedScreenFrame.w) * nextScreenFrame.w) + nextScreenFrame.x)
  windowFrame.y = ((((windowFrame.y - focusedScreenFrame.y) / focusedScreenFrame.h) * nextScreenFrame.h) + nextScreenFrame.y)
  windowFrame.h = ((windowFrame.h / focusedScreenFrame.h) * nextScreenFrame.h)
  windowFrame.w = ((windowFrame.w / focusedScreenFrame.w) * nextScreenFrame.w)

  focusedWindow:setFrame(windowFrame)
end)