Feature request: Support multiple screens

[fsto]

Dayflow currently detects one of my screens. I'm using 2 screens and would love Dayflow to analyze both of them.

[squatto]

I didn't even realize this was how it worked until I read this issue 🤦🏼‍♂️ I have 5 screens, so it's definitely missing a lot of my activity. It looks like it is only recording the screen that is set as your primary/main screen (the one with the menu bar in Settings > Displays > Arrange). e.g. for me it only records the bottom middle display:

[squatto]

Actually, after looking into the code (and subsequently through my recordings), what is happening is that it is determining what your "active" display is by looking at which display your mouse cursor is currently on:

Dayflow/Dayflow/Dayflow/Core/Recording/ActiveDisplayTracker.swift

Lines 67 to 87 in 3f6a019

	private func tick() {
	let loc = NSEvent.mouseLocation
	guard let screen = NSScreen.screens.first(where: { $0.frame.insetBy(dx: hysteresisInset, dy: hysteresisInset).contains(loc) })
	?? NSScreen.screens.first(where: { $0.frame.contains(loc) })
	else { return }
	let newID = (screen.deviceDescription[NSDeviceDescriptionKey("NSScreenNumber")] as? NSNumber)?.uint32Value
	guard let id = newID else { return }
	let now = Date()
	if candidateID != id {
	candidateID = id
	candidateSince = now
	return
	}
	// Candidate is stable long enough
	if activeDisplayID != id, let since = candidateSince, now.timeIntervalSince(since) >= debounceSeconds {
	activeDisplayID = id
	}
	}

The screen recorder uses the "active display tracker" above to determine the screen to record:

Dayflow/Dayflow/Dayflow/Core/Recording/ScreenRecorder.swift

Lines 118 to 125 in 3f6a019

	// Active display tracking
	tracker = ActiveDisplayTracker()
	activeDisplaySub = tracker.$activeDisplayID
	.removeDuplicates()
	.sink { [weak self] newID in
	guard let self, let newID else { return }
	self.q.async { [weak self] in self?.handleActiveDisplayChange(newID) }
	}

...and...

Dayflow/Dayflow/Dayflow/Core/Recording/ScreenRecorder.swift

Lines 251 to 262 in 3f6a019

	// Read tracker's active display on the main actor to respect isolation
	let trackerID: CGDirectDisplayID? = await MainActor.run { [weak tracker] in tracker?.activeDisplayID }
	let preferredID = requestedDisplayID ?? trackerID
	let display: SCDisplay
	if let pid = preferredID, let scd = displaysByID[pid] {
	display = scd
	} else if let first = content.displays.first {
	display = first
	} else {
	throw RecorderError.noDisplay
	}
	currentDisplayID = display.displayID

All of this is to say that recording every screen will be a rather sizable overhaul to the way that screen recording is currently done.

[squatto]

On a related note, I think that determining your "active" screen based on your mouse position is highly problematic for people with multiple screens that primarily/largely use their keyboard. I don't use my mouse for a sizable portion of my day, and instead change my focused app using either ⌘+Tab, Alfred, or hotkeys (using BetterTouchTool and a hyper key). I need to pay a lot more attention to how accurately DayFlow is tracking my actual activity 😂