Logitech mouse support through hidpp2.0 [enhancement]

[PradyumnaKrishna]

Description

I am using a Logitech M650 mouse that has 5 buttons, however the app doesn't recognizes swipe movements/ guestures on the 4th and 5th button of my mouse. Logitech own driver Logi Options and BetterMouse does support them. I do have a small idea how it does that.

I encountered logiops thats an unofficial linux drive for logitech mouses and also supports guestures and it does with the help of hidpp. hidpp is a protocol designed to customize logitech mouse I guess. I found you've a port of hidpp available for mac, and I really appreciate your efforts. I tried setting up my mouse with that.

Through hidpp I can customize my mouse 3, 4 and 5 buttons, but it doesn't works out of the box.

$ ./hidpp20-reprog-controls dev://4295238409 info
Control	Task	Info	Fn	Capabilities	Group	Remap to groups
0x0050	0x0038	mouse	-	-	1	-
0x0051	0x0039	mouse	-	-	1	-
0x0052	0x003a	mouse	-	reprog, divert	3	1 2 3
0x0053	0x003c	mouse	-	reprog, divert	2	1 2
0x0056	0x003e	mouse	-	reprog, divert	2	1 2
0x00d7	0x00b4	-	-	divert, virtual	4	-

I tried BetterMouse and it customizes mouse 4 button to use the following flags:

$ ./hidpp20-reprog-controls dev://4295238409 get 0x0053
0x0056 (flags: divert)

The app doesn't even recognize the button now. Tried Karabiner-Eventviewer and looks like it is listed in Unknown events. Means Macos doesn't recognizes these events out of the box.

I am not sure how to make these events get recognized in the mac-mouse-fix app. On looking at the source code it uses Mac CGEvent API to found out the button events.

Rationale

This will add support to various logitech mouses through the app.

Additional info

I’m willing to put in the effort, but I’m relatively new to app development and C programming. Therefore, I’ll need your constant assistance.