grid.lua

local grid = {}
local window = hs.window

function grid.snap(win, x, y, w, h)
  local newframe = {
    x = x,
    y = y,
    w = w,
    h = h,
  }
  win:setFrame(newframe, 0)
end

-- |XX|
-- |XX|
function grid.maximize_window()
  local win = window.focusedWindow()
  local s = win:screen():frame()
  grid.snap(win, s.x, 0, s.w, s.h)
end

-- |X |
-- |  |
function grid.snap_northwest()
  local win = window.focusedWindow()
  local s = win:screen():frame()
  grid.snap(win, s.x, 0, s.w/2, s.h/2)
end

-- |XX|
-- |  |
function grid.snap_north()
  local win = window.focusedWindow()
  local s = win:screen():frame()
  grid.snap(win, s.x, 0, s.w, s.h/2)
end

-- | X|
-- |  |
function grid.snap_northeast()
  local win = window.focusedWindow()
  local s = win:screen():frame()
  grid.snap(win, s.x+s.w/2, 0, s.w/2, s.h/2)
end

-- |X |
-- |X |
function grid.snap_west()
  local win = window.focusedWindow()
  local s = win:screen():frame()
  grid.snap(win, s.x, 0, s.w/2, s.h)
end


-- | X|
-- | X|
function grid.snap_east()
  local win = window.focusedWindow()
  local s = win:screen():frame()
  grid.snap(win, s.x+s.w/2, 0, s.w/2, s.h)
end

-- |  |
-- |X |
function grid.snap_southwest()
  local win = window.focusedWindow()
  local s = win:screen():frame()
  grid.snap(win, s.x, s.y+(s.h/2), s.w/2, s.h/2)
end

-- |  |
-- |XX|
function grid.snap_south()
  local win = window.focusedWindow()
  local s = win:screen():frame()
  grid.snap(win, s.x, s.y+(s.h/2), s.w, s.h/2)
end

-- |  |
-- | X|
function grid.snap_southeast()
  local win = window.focusedWindow()
  local s = win:screen():frame()
  grid.snap(win, s.x+s.w/2, s.y+(s.h/2), s.w/2, s.h/2)
end


function grid.pushwindow_nextscreen()
  local win = window.focusedWindow()
  local new_screen = win:screen():next():frame()
  local old_screen = win:screen():frame()
  local h_perc = win:size().h / old_screen.h
  local w_perc = win:size().w / old_screen.w
  local x_perc = math.abs(old_screen.x-win:topLeft().x) / old_screen.w
  local y_perc = (win:topLeft().y - old_screen.y) / old_screen.h
  grid.snap(win,
    new_screen.x + (new_screen.w * x_perc),
    new_screen.y + (new_screen.h * y_perc),
    new_screen.w * w_perc,
    new_screen.h * h_perc
  )
end

return grid

init.lua

local hyper = {"ctrl", "shift", "alt", "cmd"}
local grid = require "grid"
local window = require "hs.window"
local hotkey = require "hs.hotkey"

hs.hints.style = "vimperator"

hs.grid.MARGINX = 0
hs.grid.MARGINY = 0
hs.grid.GRIDHEIGHT = 13
hs.grid.GRIDWIDTH = 13

-- Disable window animations (janky for iTerm)
window.animationDuration = 0

-- Snap Window
hotkey.bind(hyper, 'U', grid.snap_northwest)
hotkey.bind(hyper, 'I', grid.snap_north)
hotkey.bind(hyper, 'O', grid.snap_northeast)

hotkey.bind(hyper, 'J', grid.snap_west)
hotkey.bind(hyper, 'K', grid.maximize_window)
hotkey.bind(hyper, 'L', grid.snap_east)

hotkey.bind(hyper, 'M', grid.snap_southwest)
hotkey.bind(hyper, ',', grid.snap_south)
hotkey.bind(hyper, '.', grid.snap_southeast)

hotkey.bind(hyper, 'LEFT', hs.grid.pushWindowLeft)
hotkey.bind(hyper, 'RIGHT', hs.grid.pushWindowRight)
hotkey.bind(hyper, '+', hs.grid.pushWindowNextScreen)
hotkey.bind(hyper, '-', hs.grid.pushWindowPrevScreen)

-- lock computer
hotkey.bind(hyper, "Escape", function() hs.caffeinate.lockScreen() end)
hotkey.bind(hyper, "tab", function() hs.hints.windowHints() end)


-- application help
local function open_help()
  help_str = "1 - Chrome, 2 - Sublime, 2 - iTerm "
  hs.alert.show(help_str, 2)
end

-- application shortcuts
hotkey.bind(hyper, '1', function () hs.application.launchOrFocus("Google Chrome") end)
hotkey.bind(hyper, '2', function () hs.application.launchOrFocus("Sublime Text") end)
hotkey.bind(hyper, '3', function () hs.application.launchOrFocus("iTerm") end)
hotkey.bind(hyper, '`', open_help)

-- reload config on save
function reloadConfig(files)
    doReload = false
    for _,file in pairs(files) do
        if file:sub(-4) == ".lua" then
            doReload = true
        end
    end
    if doReload then
        hs.reload()
    end
end
hs.pathwatcher.new(os.getenv("HOME") .. "/.hammerspoon/", reloadConfig):start()
hs.alert.show("Config loaded")