Cycle through three different actions with consecutive keypresses

[fooness]

Hello everyone.

I would like to improve my window management keymaps to not only move/resize windows to, for example, the left half of the screen, but also the left one_third ord two_thirds. There’s probably some rather easy and very elegant solution to this, but I did not find anything helpful during my research.

Here’s my prototypical code, which … is definitely not very elegant.

Also I would like to implement the same behavior for other keymaps, so the local i, if necessary at all, should be local inside the function, not outside as it is now.

local i

-- move / resize window left
hs.hotkey.bind({ "cmd", "ctrl" }, "h", function()
  if i == 0 then
    hs.window.focusedWindow():moveToUnit({ 0, 0, 0.5, 1 }, 0)
    i = i + 1
  elseif i == 1 then
    hs.window.focusedWindow():moveToUnit({ 0, 0, 0.33, 1 }, 0)
    i = i + 1
  elseif i == 2 then
    hs.window.focusedWindow():moveToUnit({ 0, 0, 0.67, 1 }, 0)
    i = i + 1
  else
    i = 0
  end
end)

Maybe someone could help out, please?

PS: I could use https://github.com/peterklijn/hammerspoon-shiftit for my purposes, but from a learning-perspective I’d still be interested if there’s an easy and elegant solution besides something rather complex as the following examples:

• https://stackoverflow.com/a/69194126
• https://stackoverflow.com/a/44350843

Or maybe, well, there is not easier solution to this problem …

[megalithic]

@fooness perhaps ask over on Discord too: https://discord.gg/3KxPBF9v

[muescha]

you can do this with a helper:

function hotkeybindcycle(modifier, key, message, callbackMap)
    local currentIndex = 1
    local maxIndex = #callbackMap
    local hotkeyHandler
    hotkeyHandler = hs.hotkey.bind(modifier, key, message, function()
        callbackMap[currentIndex]()
        currentIndex = (currentIndex % maxIndex) + 1
    end)
end

source: https://github.com/muescha/dot_hammerspoon/blob/master/Helpers/HotkeyBindCycle.lua

require("Helpers.HotkeyBindCycle")

fileInfo()

hotkeybindcycle(hyper, "v", keyInfo("Cycle abc"), {
    function() print("a") end,
    function() print("b") end,
    function() print("c") end,
})

hotkeybindcycle(hyper, "b", keyInfo("Cycle defg"), {
    function() print("d") end,
    function() print("e") end,
    function() print("f") end,
    function() print("g") end,
})

source: https://github.com/muescha/dot_hammerspoon/blob/master/Functions/HotkeybindCycleTest.lua

you need to adjust the require to your file structure - fileInfo() and keyInfo() you can remove and add your message, local hotkeyHandler is on an extra line so you can access it and add hotkeyHandler:disable() and hotkeyHandler:disable() if there is need.

[muescha]

if you like to have an variable for all keys you can do a table with the key {modifier,key} or your own textkey/objectkey (and yes you can use {} objects as a key for a table) :

cycleIndex = {}

modifier = { "cmd", "ctrl" }
key = "h"

cycleIndex[{modifier,key}] = 1 -- init index 
hs.hotkey.bind(modifier,key, function() 
	var currentIndex = cycleIndex[{modifier,key}]  -- get the current index  
	if currentIndex == 1 then
    -- do something
	elseif currentIndex == 2 then
	-- do something
    elseif currentIndex == 3 then
	-- do something
	end
	cycleIndex[{modifier,key}] = (cycleIndex[{modifier,key}] % maxIndex) + 1
end)