A Linux version

A few people asked about this over years and the Linux API is kind of similar, so there’s this.

• The respective X11 function (XGrabPointer) can only lock the mouse to the window (not a specific screen region), so display_mouse_lock’s arguments will be ignored on Linux.
• display_mouse_unlock works as usual.
• I added a display_mouse_lock_auto() function to auto-lock to window region for consistency between Windows/Linux.
• Since X11 doesn’t let you lock mouse to a region, display_mouse_bounds will return undefined on Linux.

Anyway, the following will work both on Windows and Linux:

if (window_has_focus()) {
	display_mouse_lock_auto();
} else {
	display_mouse_unlock();
}

“But what about Mac?”

As far as I can tell, CGAssociateMouseAndMouseCursorPosition is the closest approximation of mouse locking on Mac OS, which is what window_mouse_set_locked uses. There’s no benefit to me re-implementing it in an extension.