Hammerspoon config for window management

init.lua

hs.hotkey.bind({"cmd", "alt", "ctrl"}, "R", function() hs.reload() end)
hs.alert.show("Config loaded")

-- Fullscreen
hs.hotkey.bind({"cmd", "alt"}, "1",
  function()
    local window, screen = getFocusedWindowAndScreen()
    window.w = screen.w
    window.x = screen.x
    window.y = screen.y
    window.h = screen.h
    hs.window.focusedWindow():setFrame(window, 0)
  end
)

-- Half width left
hs.hotkey.bind({"cmd", "alt"}, "2",
  function()
    -- Left
    local window, screen = getFocusedWindowAndScreen()
    window.w = math.floor(screen.w / 2)
    window.h = screen.h
    window.x = screen.x
    window.y = 0
    hs.window.focusedWindow():setFrame(window, 0)
  end
)

-- Half width right
hs.hotkey.bind({"cmd", "alt"}, "3",
  function()
    -- Right
    local window, screen = getFocusedWindowAndScreen()
    window.w = math.floor(screen.w / 2)
    window.h = screen.h
    window.x = screen.x + math.floor(screen.w / 2)
    window.y = 0
    hs.window.focusedWindow():setFrame(window, 0)
  end
)

-- 4x4 grid: Top left
hs.hotkey.bind({"cmd", "alt"}, "4",
  function()
    local window, screen = getFocusedWindowAndScreen()
    local halfWidth = math.floor(screen.w / 2)
    window.w = halfWidth
    window.h = math.floor(screen.h / 2)
    window.x = screen.x
    window.y = screen.y
    hs.window.focusedWindow():setFrame(window, 0)
  end
)

-- 4x4 grid: Top right
hs.hotkey.bind({"cmd", "alt"}, "5",
  function()
    local window, screen = getFocusedWindowAndScreen()
    local halfWidth = math.floor(screen.w / 2)
    window.w = halfWidth
    window.h = math.floor(screen.h / 2)
    window.x = screen.x + halfWidth
    window.y = screen.y
    hs.window.focusedWindow():setFrame(window, 0)
  end
)

-- 4x4 grid: Bottom left
hs.hotkey.bind({"cmd", "alt"}, "6",
  function()
    local window, screen = getFocusedWindowAndScreen()
    local halfWidth = math.floor(screen.w / 2)
    local halfHeight = math.floor(screen.h / 2)

    window.w = halfWidth
    window.h = halfHeight
    window.x = screen.x
    window.y = screen.y + halfHeight
    hs.window.focusedWindow():setFrame(window, 0)
  end
)

-- 4x4 grid: Bottom right
hs.hotkey.bind({"cmd", "alt"}, "7",
  function()
    local window, screen = getFocusedWindowAndScreen()
    local halfWidth = math.floor(screen.w / 2)
    local halfHeight = math.floor(screen.h / 2)
    window.w = halfWidth
    window.h = halfHeight
    window.x = screen.x + halfWidth
    window.y = screen.y + halfHeight
    hs.window.focusedWindow():setFrame(window, 0)
  end
)

-- 16x9 screen recording dimensions
hs.hotkey.bind({"cmd", "alt"}, "0",
  function()
    local window, screen = getFocusedWindowAndScreen()
    local width = 1920
    local height = width / (16 / 9)

    window.w = width
    window.h = height
    window.x = screen.x + (screen.w - width)
    window.y = screen.y
    hs.window.focusedWindow():setFrame(window, 0)
  end
)

-- Get the currently focused window and screen
function getFocusedWindowAndScreen()
  return
    hs.window.focusedWindow():frame(), -- frame of the focused window
    hs.window.focusedWindow():screen():frame() -- frame of the focused screen
end