Simple X utility to hide the mouse cursor in certain windows. You pass it a list of conditions and if a matching window becomes focused the mouse cursor is hidden.
Help output listed below. Flags can be repeated, so you can pass in e.g. multiple classes.
corvo: [CONDITIONS]
-h print this help and exit
CONDITIONS:
-t TITLE hide the cursor on windows with TITLE as their window title (WM_NAME)
-c CLASS hide the cursor on windows with CLASS as their class value (first value in WM_CLASS)
-i INSTANCE hide the cursor on windows with INSTANCE as their class value (second value in WM_CLASS)
-w WINDOW hide the cursor on the window with the ID WINDOW
Dependencies
xcbxcb-xfixes
Then just run make to build the binary in the project folder and make install to install it to the bin folder in the specified prefix (default /usr/local)
The focused window is tracked using the _NET_ACTIVE_WINDOW atom on the root window, if your window manager does not have this (it probably does) then it will not work.
Additionally, if you move the cursor from a hiding window to a window that wouldn't take focus/be put into _NET_ACTIVE_WINDOW (such as the root window, and possibly bars and such) then the cursor will stay hidden.