Hammerspoon config with support for simple window management.

init.lua

-- Hot Config Reloading

function reloadConfig(files)
	for _, file in pairs(files) do
        if file:sub(-4) == ".lua" then
			hs.reload()
			break
        end
	end
end

hs.pathwatcher.new(os.getenv("HOME") .. "/.hammerspoon/", reloadConfig):start()
hs.alert.show("Config loaded")

-- Window Management

local currentlyFullscreen = false

local win = hs.window.focusedWindow()
local screen = win:screen()
local max = screen:frame()

local displayAreaFractionX = 0.88
local displayAreaFractionY = 0.85
local displayAreaW = max.w * displayAreaFractionX
local displayAreaH = max.h * displayAreaFractionY
local displayAreaX = max.x + max.w * (1 - displayAreaFractionX) / 2
local displayAreaY = max.y + max.h * (1 - displayAreaFractionY) / 2

local displayAreaSmallFractionX = 0.62
local displayAreaSmallFractionY = 0.68
local displayAreaSmallW = max.w * displayAreaSmallFractionX
local displayAreaSmallH = max.h * displayAreaSmallFractionY
local displayAreaSmallX = max.x + max.w * (1 - displayAreaSmallFractionX) / 2
local displayAreaSmallY = max.y + max.h * (1 - displayAreaSmallFractionY) / 2

hs.hotkey.bind({"ctrl", "alt"}, "return", function()
	local windows = hs.window.orderedWindows()

	for key, win in pairs(windows) do
		local f = win:frame()
		local title = win:title()

		if string.len(title) == 0 then
			goto continue
		end

		local small = false
		local application = win:application()
		if application == nil then
			goto continue
		end

		local appName = application:title()
		local small = appName == "Finder" or appName == "Notes" or appName == "Terminal" or appName == "Activity Monitor"

		if small then
			f.x = displayAreaSmallX
			f.y = displayAreaSmallY
			f.w = displayAreaSmallW
			f.h = displayAreaSmallH
		else
			if currentlyFullscreen then
				f.x = displayAreaX
				f.y = displayAreaY
				f.w = displayAreaW
				f.h = displayAreaH
			else
				f.x = max.x
				f.y = max.y
				f.w = max.w
				f.h = max.h
			end
		end

		win:setFrame(f, 0)
		::continue::
	end

	currentlyFullscreen = not currentlyFullscreen
end)

hs.hotkey.bind({"ctrl", "alt"}, "Left", function()
	local win = hs.window.focusedWindow()
	local f = win:frame()
	local screen = win:screen()
	local max = screen:frame()

	f.x = max.x
	f.y = max.y
	f.w = max.w / 2
	f.h = max.h

	win:setFrame(f, 0)
end)

hs.hotkey.bind({"ctrl", "alt"}, "Right", function()
	local win = hs.window.focusedWindow()
	local f = win:frame()
	local screen = win:screen()
	local max = screen:frame()

	f.x = max.x + max.w / 2
	f.y = max.y
	f.w = max.w / 2
	f.h = max.h

	win:setFrame(f, 0)
end)

hs.hotkey.bind({"ctrl", "alt"}, "Up", function()
	local win = hs.window.focusedWindow()
	local f = win:frame()
	local screen = win:screen()
	local max = screen:frame()

	f.x = max.x
	f.y = max.y
	f.w = max.w
	f.h = max.h / 2

	win:setFrame(f, 0)
end)

hs.hotkey.bind({"ctrl", "alt"}, "Down", function()
	local win = hs.window.focusedWindow()
	local f = win:frame()
	local screen = win:screen()
	local max = screen:frame()

	f.x = max.x
	f.y = max.y + max.h / 2
	f.w = max.w
	f.h = max.h / 2

	win:setFrame(f, 0)
end)

hs.hotkey.bind({"ctrl", "alt"}, "C", function()
	local win = hs.window.focusedWindow()
	local f = win:frame()
	local screen = win:screen()
	local max = screen:frame()

	f.x = max.x + (max.w - f.w) / 2
	f.y = max.y + (max.h - f.h) / 2
	win:setFrame(f, 0)
end)

-- Brightness

hs.hotkey.bind({"ctrl", "alt"}, "-", function()
	hs.brightness.set(1)
end)