Fix: Implement device polling for late-connecting multitouch devices …

[NullPointerDepressiveDisorder]

This pull request adds robust support for polling and connecting to multitouch devices (such as Bluetooth trackpads) that may not be present at app launch, improving reliability on systems where devices connect after boot or wake. It introduces a device polling mechanism with exponential backoff, user feedback, and comprehensive tests to ensure correct behavior. Additionally, it refines logging and improves safety annotations in the codebase.

Device polling and connection improvements:

• Added a device polling mechanism in MultitouchManager that periodically checks for newly connected multitouch devices when none are found at launch, using exponential backoff and a maximum timeout. The polling state is exposed via isPollingForDevices, and user actions (such as toggling enabled state) now interact correctly with polling. [1] [2] [3] [4] [5] [6] [7] [8] [9]
• Updated AppDelegate to log when the app is polling for device connections, providing clearer feedback to users.

Testing enhancements:

• Added comprehensive tests in MultitouchManagerTests to verify polling behavior, including starting, stopping, double-start prevention, toggling, and constant values. [1] [2] [3]

Logging and code safety:

• Improved logging messages for device connection and polling events, and removed unnecessary use of the unsafe string interpolation in logging calls. [1] [2]
• Applied unsafe annotations to certain Core Graphics function calls and variable accesses in MouseEventGenerator to clarify thread-safety and code intent. [1] [2] [3]…and update UI notifications

[sentry]

Codecov Report

❌ Patch coverage is 87.50000% with 25 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
MiddleDrag/Managers/MultitouchManager.swift	92.40%	12 Missing ⚠️
MiddleDrag/UI/MenuBarController.swift	70.58%	10 Missing ⚠️
MiddleDrag/Core/MouseEventGenerator.swift	62.50%	3 Missing ⚠️

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[Copilot]

Pull request overview

This PR improves MiddleDrag’s reliability when multitouch hardware (e.g., Bluetooth trackpads) connects after app launch by adding a device polling/backoff mechanism in MultitouchManager, updating the menu UI to reflect late connections/timeouts, and extending test coverage for the new polling behavior.

Changes:

• Add device polling with exponential backoff + timeout when no multitouch hardware is available at start/restart, exposing isPollingForDevices and posting UI notifications.
• Update menu/status messaging and app logging to reflect polling/late connections/timeouts.
• Add new unit tests for polling state transitions and constants; refine some logging/concurrency annotations.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
MiddleDrag/UI/MenuBarController.swift	Observes new device/polling notifications and shows “Waiting for Trackpad…” state in the status menu.
MiddleDrag/MiddleDragTests/MultitouchManagerTests.swift	Adds polling-focused unit tests (start/stop/double-start/toggle/constants).
MiddleDrag/Managers/MultitouchManager.swift	Implements polling/backoff/timeout flow, exposes polling state, integrates with start/stop/restart/toggle.
MiddleDrag/Core/MouseEventGenerator.swift	Adjusts logging calls and adds unsafe annotations for some CoreGraphics interactions/global state.
MiddleDrag/AppDelegate.swift	Logs when the app starts in polling mode (no device at launch).

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