mirror of
https://github.com/rust-windowing/winit.git
synced 2026-06-27 07:03:15 -04:00
836e717021
`AnyClass::responds_to` delegates to `class_respondsToSelector`, a function provided by the Objective-C runtime. However, at some point, this began to return `false` for selectors referring to undocumented cursors, despite the cursors remaining accessible via said selectors. That this check fails prevents the cursors from being used. We can instead send `respondsToSelector:` to the `NSCursor` class itself. As an instance method, this is nominally impossible; however, Apple grants an exemption[1] that permits class objects to perform instance methods defined in the root class. Checking for the undocumented cursors in this way gets them working again, at least on macOS Sequoia 15.1.1. [1]: https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ObjectiveC/Chapters/ocObjectsClasses.html#//apple_ref/doc/uid/TP30001163-CH11-TPXREF120