Specify "Origin Display" for custom position shortcuts.

[whitmank]

When making custom window positions, you're currently able to specify the "Destination Display", meaning that the shortcut you assign will send the window to a specific display.

What I'd really love to be able to do is specify the "Origin Display". What I mean is that you could have a single keyboard shortcut as input, and the output could be different depending on which display the active window is currently in.

This is particularly useful in setups with both horizontal and vertical monitors, as the custom size/position actually changes depending on display.
Though this feature could be used to make two horizontal monitors behave differently if you wanted, I don't really know why you'd want to do that.
Main use case is the horizontal+vertical scenario.

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Let me give the concrete example of my desired behavior:

I have a shortcut for each third >> ⌃⌥[ , ⌃⌥] , ⌃⌥\

I want to divide my vertical monitor into >> Top Third—Mid Third—Bot Third.
I want to divide my horizontal monitor into >> Left Third—Mid Third—Right Third.

While Origin Display: [Vertical Monitor] >> Shortcut would trigger the behavior for top/mid/bot.
While Origin Display: [Horizontal Monitor] >> Shortcut would trigger the behavior for left/mid/right.

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Hopefully this makes sense. I'd really really love it if I could do this.

🥹 Pretty please 🙏

[rxhanson]

This has been in my backlog for a long time, hopefully I can get it out the door soon. Here's a related discussion: #745

Thanks for the feedback!