slow scrolling chrome with emulation=wlroots capture=layer-shell (#318) (#325)

Using niri as compositor on both sides resulting in: emulation=wlroots capture=layer-shell

Mouse scrolling works fine in terminals, but only scrolls very small amount in google-chrome (in wayland mode)

Using 'wev' to show events, using the real mouse shows

[        15:      wl_pointer] axis_source: 0 (wheel)
[        15:      wl_pointer] axis_value120: axis: 0 (vertical), value120: 120
[        15:      wl_pointer] axis_relative_direction: axis: 0 (vertical), direction: 0
[        15:      wl_pointer] axis: time: 50410752; axis: 0 (vertical), value: 15.000000

Using the lan-mouse shows:

[        15:      wl_pointer] axis_source: 2 (continuous)
[        15:      wl_pointer] axis_value120: axis: 0 (vertical), value120: 1
[        15:      wl_pointer] axis_relative_direction: axis: 0 (vertical), direction: 0
[        15:      wl_pointer] axis: time: -1913142096; axis: 0 (vertical), value: 20.000000

Without axis_source, scrolling over (pinned) tabs also skips one tab.

Author: selckin

input-emulation/src/wlroots.rs

@@ -12,7 +12,7 @@ use wayland_client::backend::WaylandError;
 use wayland_client::WEnum;
 
 use wayland_client::protocol::wl_keyboard::{self, WlKeyboard};
-use wayland_client::protocol::wl_pointer::{Axis, ButtonState};
+use wayland_client::protocol::wl_pointer::{Axis, AxisSource, ButtonState};
 use wayland_client::protocol::wl_seat::WlSeat;
 use wayland_protocols_wlr::virtual_pointer::v1::client::{
     zwlr_virtual_pointer_manager_v1::ZwlrVirtualPointerManagerV1 as VpManager,
@@ -210,7 +210,8 @@ impl VirtualInput {
                     PointerEvent::AxisDiscrete120 { axis, value } => {
                         let axis: Axis = (axis as u32).try_into()?;
                         self.pointer
-                            .axis_discrete(now, axis, value as f64 / 6., value / 120);
+                            .axis_discrete(now, axis, value as f64 / 8., value);
+                        self.pointer.axis_source(AxisSource::Wheel);
                         self.pointer.frame();
                     }
                 }