feat(pointer): virtio tablet as 2nd input dev (driver per-instance VAs, abs/btn decode), input server serves 2 devices on one notif; display software cursor, bar click switches window, presses/releases to front window in its px; k-ui hit-tests (press focuses, release on same presses, field only focuses)

crates/libkos/src/device.rs

@@ -90,6 +90,20 @@ pub fn dma(pages: PageCount, va: VirtualAddress) -> Result<Dma> {
 /// Routes `irq` to a fresh notification bound to the calling thread, so
 /// its receive calls also return when the interrupt fires, and arms the
 /// line (lines start masked; every acknowledgement re-arms).
+/// Routes every one of `irqs` to one notification bound to this thread:
+/// several devices, one wait.
+pub fn bind_irqs(irqs: &[CapSlot]) -> Result<()> {
+    let notification = syscall::create_notification()?;
+    for irq in irqs {
+        syscall::set_irq_notification(*irq, notification)?;
+    }
+    syscall::bind_notification(notification)?;
+    for irq in irqs {
+        syscall::ack_interrupt(*irq)?;
+    }
+    Ok(())
+}
+
 pub fn bind_irq(irq: CapSlot) -> Result<()> {
     let notification = syscall::create_notification()?;
     syscall::set_irq_notification(irq, notification)?;

crates/libkos/src/input.rs

@@ -21,6 +21,10 @@ pub enum Key {
 pub enum InputEvent {
     KeyDown(Key),
     KeyUp(Key),
+    /// A button (0 left, 1 right) pressed or let go at (`x`, `y`): through
+    /// a window, its pixels.
+    PointerDown { button: u8, x: u16, y: u16 },
+    PointerUp { button: u8, x: u16, y: u16 },
 }
 
 fn decode_key(kind: usize, extra: usize) -> Option<Key> {
@@ -50,6 +54,14 @@ pub fn decode([tag, kind, extra, _]: [usize; 4]) -> Option<InputEvent> {
         0 => None,
         1 => decode_key(kind, extra).map(InputEvent::KeyDown),
         2 => decode_key(kind, extra).map(InputEvent::KeyUp),
+        types::input::event::POINTER_DOWN | types::input::event::POINTER_UP => {
+            let (x, y) = types::input::event::unpack_point(extra);
+            let button = kind as u8;
+            Some(match tag {
+                types::input::event::POINTER_DOWN => InputEvent::PointerDown { button, x, y },
+                _ => InputEvent::PointerUp { button, x, y },
+            })
+        }
         _ => None,
     }
 }