hammerspoon - with window management

README.md

Prerequisite

# Install basic tools (only needed for the first time)
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
brew install wget

# Install hammerspoon
brew install --cask hammerspoon
open /Applications/Hammerspoon.app
mv ~/.hammerspoon/init.lua ~/.hammerspoon/init.lua.bak
wget https://gist.github.com/alankyshum/43e33ecdc06c87dbc11a50ab22e62173/raw/b2428389da2de3e12d4303e6a7513412365aaf37/init.lua -O ~/.hammerspoon/init.lua

# Install Rectangle
brew install --cask rectangle

Configure Hammerspoon

Finally, open Hammerspoon preference from the Mac OS Menu Bar, and enable Accessibility permission

Step	Screenshot
Configure hammerspoon
Reload config from Mac Menu Bar

Configure Rectangle

1. Open the newly installed "Reactangle" app

Step	Screenshot
Configure keyboard shortcut (Use any shortcuts you want)
Launch on login

init.lua

hyper = {"ctrl", "alt", "cmd"}

hs.window.animationDuration = 0.0

local sizes = {24/6, 24/9, 24/12, 24/15}
local fullScreenSizes = {1, 4/3, 2, 3}

local GRID = {w = 24, h = 24}
hs.grid.setGrid(GRID.w .. 'x' .. GRID.h)
hs.grid.MARGINX = 0
hs.grid.MARGINY = 0

local pressed = {
  up = false,
  down = false,
  left = false,
  right = false
}

function nextStep(dim, offs, cb)
  if hs.window.focusedWindow() then
    local axis = dim == 'w' and 'x' or 'y'
    local oppDim = dim == 'w' and 'h' or 'w'
    local oppAxis = dim == 'w' and 'y' or 'x'
    local win = hs.window.frontmostWindow()
    local id = win:id()
    local screen = win:screen()

    cell = hs.grid.get(win, screen)

    local nextSize = sizes[1]
    for i=1,#sizes do
      if cell[dim] == GRID[dim] / sizes[i] and
        (cell[axis] + (offs and cell[dim] or 0)) == (offs and GRID[dim] or 0)
        then
          nextSize = sizes[(i % #sizes) + 1]
        break
      end
    end

    cb(cell, nextSize)
    if cell[oppAxis] ~= 0 and cell[oppAxis] + cell[oppDim] ~= GRID[oppDim] then
      cell[oppDim] = GRID[oppDim]
      cell[oppAxis] = 0
    end

    hs.grid.set(win, cell, screen)
  end
end

function nextFullScreenStep()
  if hs.window.focusedWindow() then
    local win = hs.window.frontmostWindow()
    local id = win:id()
    local screen = win:screen()

    cell = hs.grid.get(win, screen)

    local nextSize = fullScreenSizes[1]
    for i=1,#fullScreenSizes do
      if cell.w == GRID.w / fullScreenSizes[i] and
         cell.h == GRID.h and
        --  cell.h == GRID.h / fullScreenSizes[i] and
         cell.x == (GRID.w - GRID.w / fullScreenSizes[i]) / 2 and
         cell.y == 0 then
        --  cell.y == (GRID.h - GRID.h / fullScreenSizes[i]) / 2 then
        nextSize = fullScreenSizes[(i % #fullScreenSizes) + 1]
        break
      end
    end

    cell.w = GRID.w / nextSize
    -- cell.h = GRID.h / nextSize
    cell.h = GRID.h -- always full height
    cell.x = (GRID.w - GRID.w / nextSize) / 2
    -- cell.y = (GRID.h - GRID.h / nextSize) / 2
    cell.y = 0 -- always full height

    hs.grid.set(win, cell, screen)
  end
end

function fullDimension(dim)
  if hs.window.focusedWindow() then
    local win = hs.window.frontmostWindow()
    local id = win:id()
    local screen = win:screen()
    cell = hs.grid.get(win, screen)

    if (dim == 'x') then
      cell = '0,0 ' .. GRID.w .. 'x' .. GRID.h
    else
      cell[dim] = GRID[dim]
      cell[dim == 'w' and 'x' or 'y'] = 0
    end

    hs.grid.set(win, cell, screen)
  end
end

hs.hotkey.bind(hyper, "down", function ()
  pressed.down = true
  if pressed.up then
    fullDimension('h')
  else
    nextStep('h', true, function (cell, nextSize)
      cell.y = GRID.h - GRID.h / nextSize
      cell.h = GRID.h / nextSize
    end)
  end
end, function ()
  pressed.down = false
end)

hs.hotkey.bind(hyper, "right", function ()
  pressed.right = true
  if pressed.left then
    fullDimension('w')
  else
    nextStep('w', true, function (cell, nextSize)
      cell.x = GRID.w - GRID.w / nextSize
      cell.w = GRID.w / nextSize
    end)
  end
end, function ()
  pressed.right = false
end)

hs.hotkey.bind(hyper, "left", function ()
  pressed.left = true
  if pressed.right then
    fullDimension('w')
  else
    nextStep('w', false, function (cell, nextSize)
      cell.x = 0
      cell.w = GRID.w / nextSize
    end)
  end
end, function ()
  pressed.left = false
end)

hs.hotkey.bind(hyper, "up", function ()
  pressed.up = true
  if pressed.down then
      fullDimension('h')
  else
    nextStep('h', false, function (cell, nextSize)
      cell.y = 0
      cell.h = GRID.h / nextSize
    end)
  end
end, function ()
  pressed.up = false
end)

hs.hotkey.bind(hyper, "f", function ()
  nextFullScreenStep()
end)

hs.hotkey.bind(hyper, "i", function ()
  local win = hs.window.frontmostWindow()
  local id = win:id()
  local screen = win:screen()
  cell = hs.grid.get(win, screen)
  hs.alert.show(cell)
end)

install-hammerspoon.sh

# Install basic tools (only needed for the first time)
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
brew install wget

# Install hammerspoon
brew install --cask hammerspoon
mv ~/.hammerspoon/init.lua ~/.hammerspoon/init.lua.bak
wget https://gist.github.com/alankyshum/43e33ecdc06c87dbc11a50ab22e62173/raw/b2428389da2de3e12d4303e6a7513412365aaf37/init.lua -O ~/.hammerspoon/init.lua

# Install Rectangle
brew install --cask rectangle