Hammerspoon basic configuration

init.lua

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-- Config for https://www.hammerspoon.org/
-- Based on https://gist.github.com/philc/ed70ae4e60062c2d494fae97d5da43ce
-- see above for more advanced config including multiple display support
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-- the set of modifier keys you want to use with your shortcuts
local modifiers = {"cmd", "shift"}

-- make animations fast
hs.window.animationDuration = 0.1

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-- Window positioning
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function moveTopHalf()
  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)
end

function moveBottomHalf()
  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)
end

function moveLeftHalf()
  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)
end

function moveRightHalf()
  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)
end

function maximize()
  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
  win:setFrame(f)
end

hs.hotkey.bind(modifiers, "left", function() moveLeftHalf() end)
hs.hotkey.bind(modifiers, "right", function() moveRightHalf() end)
hs.hotkey.bind(modifiers, "up", function() moveTopHalf() end)
hs.hotkey.bind(modifiers, "down", function() moveBottomHalf() end)
hs.hotkey.bind(modifiers, "m", maximize)
-- maximize is so common, also enable with just Cmd key, since I don't use the default OS X minimize shortcut
hs.hotkey.bind({"cmd"}, "m", maximize)

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-- Application focusing shortcuts
-- When in doubt of the correct name, use the hover-text from the Dock icon.
-- QAZ are used due to being very easy to hit with the modifier keys on a QWERTY keyboard. Adjust as desired.
-------------------------------------
hs.hotkey.bind(modifiers, 'Q', function() hs.application.launchOrFocus('Google Chrome') end)
hs.hotkey.bind(modifiers, 'A', function() hs.application.launchOrFocus('Terminal') end)
hs.hotkey.bind(modifiers, 'Z', function() hs.application.launchOrFocus('Visual Studio Code') end)
hs.hotkey.bind(modifiers, 'S', function() hs.application.launchOrFocus('Slack') end)