Starting input system

server/src/input/events/keyboard.rs

@@ -1,3 +1,4 @@
+use std::fmt::{Display, Formatter};
 use crate::input::events::{KvmButtonState, KvmEvent, KvmEventTrait};
 
 pub struct KvmKeyboardEvent {
@@ -10,3 +11,12 @@ impl KvmEventTrait for KvmKeyboardEvent {
         KvmEvent::Keyboard(self)
     }
 }
+
+impl Display for KvmKeyboardEvent {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self.state {
+            KvmButtonState::Pressed => write!(f, "Press {}", self.key_code),
+            KvmButtonState::Released => write!(f, "Press {}", self.key_code)
+        }
+    }
+}

server/src/input/events/mod.rs

@@ -22,17 +22,8 @@ pub trait KvmEventTrait {
 impl Display for KvmEvent {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         match self {
-            KvmEvent::Pointer(_) => write!(f, "Pointer"),
-            KvmEvent::Keyboard(_) => write!(f, "Keyboard")
-        }
-    }
-}
-
-impl Display for KvmButtonState {
-    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
-        match self {
-            KvmButtonState::Pressed => write!(f, "Pressed"),
-            KvmButtonState::Released => write!(f, "Released")
+            KvmEvent::Pointer(e) => write!(f, "Pointer({e})"),
+            KvmEvent::Keyboard(e) => write!(f, "Keyboard({e})")
         }
     }
 }

server/src/input/events/pointer.rs

@@ -1,7 +1,9 @@
+use std::fmt::{Display, Formatter};
 use crate::input::events::{KvmButtonState, KvmEvent, KvmEventTrait};
 
 pub enum KvmPointerEvent {
-    Motion(KvmPointerMotionEvent),
+    MotionRelative(KvmPointerMotionRelativeEvent),
+    MotionAbsolute(KvmPointerMotionAbsoluteEvent),
     Button(KvmPointerButtonEvent),
     Scroll(KvmPointerScrollEvent),
 }
@@ -11,13 +13,20 @@ pub struct KvmPointerButtonEvent {
     pub state: KvmButtonState,
 }
 
-pub struct KvmPointerMotionEvent {
+pub struct KvmPointerMotionRelativeEvent {
     pub dx: f64,
     pub dx_unaccelerated: f64,
     pub dy: f64,
     pub dy_unaccelerated: f64,
 }
 
+pub struct KvmPointerMotionAbsoluteEvent {
+    pub x: f64,
+    pub x_mm: f64,
+    pub y: f64,
+    pub y_mm: f64,
+}
+
 pub struct KvmPointerScrollEvent {
     pub horizontal_scroll_value: f64,
     pub vertical_scroll_value: f64,
@@ -49,6 +58,45 @@ macro_rules! kvm_event_traits {
     }
 }
 
-kvm_event_traits!(Motion, KvmPointerMotionEvent);
+kvm_event_traits!(MotionRelative, KvmPointerMotionRelativeEvent);
+kvm_event_traits!(MotionAbsolute, KvmPointerMotionAbsoluteEvent);
 kvm_event_traits!(Button, KvmPointerButtonEvent);
 kvm_event_traits!(Scroll, KvmPointerScrollEvent);
+
+impl Display for KvmPointerEvent {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            KvmPointerEvent::Button(e) => write!(f, "Button({e})"),
+            KvmPointerEvent::MotionRelative(e) => write!(f, "MotionRelative({e})"),
+            KvmPointerEvent::MotionAbsolute(e) => write!(f, "MotionAbsolute({e})"),
+            KvmPointerEvent::Scroll(e) => write!(f, "Scroll({e})")
+        }
+    }
+}
+
+impl Display for KvmPointerButtonEvent {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self.state {
+            KvmButtonState::Pressed => write!(f, "Press {}", self.button),
+            KvmButtonState::Released => write!(f, "Release {}", self.button)
+        }
+    }
+}
+
+impl Display for KvmPointerMotionRelativeEvent {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(f, "x: {} ({}), y: {} ({})", self.dx, self.dx_unaccelerated, self.dy, self.dy_unaccelerated)
+    }
+}
+
+impl Display for KvmPointerMotionAbsoluteEvent {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(f, "x: {} ({}), y: {} ({})", self.x, self.x_mm, self.y, self.y_mm)
+    }
+}
+
+impl Display for KvmPointerScrollEvent {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(f, "h: {}, v: {}", self.horizontal_scroll_value, self.vertical_scroll_value)
+    }
+}

server/src/input/mappings.rs

@@ -5,7 +5,7 @@ use input::event::pointer::{Axis, ButtonState, PointerButtonEvent, PointerMotion
 
 use crate::input::events::{KvmButtonState, KvmEvent, KvmEventTrait};
 use crate::input::events::keyboard::KvmKeyboardEvent;
-use crate::input::events::pointer::{KvmPointerButtonEvent, KvmPointerEvent, KvmPointerEventTrait, KvmPointerMotionEvent, KvmPointerScrollEvent};
+use crate::input::events::pointer::{KvmPointerButtonEvent, KvmPointerEvent, KvmPointerEventTrait, KvmPointerMotionAbsoluteEvent, KvmPointerMotionRelativeEvent, KvmPointerScrollEvent};
 use crate::input::mappings::MappingError::{UnknownEvent, UnsupportedEvent};
 
 #[derive(Debug)]
@@ -47,8 +47,8 @@ impl FromLibinputEvent<PointerEvent> for KvmPointerEvent {
     fn from_libinput(event: PointerEvent) -> Result<Self, MappingError> {
         #[allow(deprecated)]
         match event {
-            PointerEvent::Motion(event) => get_pointer_event::<PointerMotionEvent, KvmPointerMotionEvent>(event),
-            PointerEvent::MotionAbsolute(event) => get_pointer_event::<PointerMotionAbsoluteEvent, KvmPointerMotionEvent>(event),
+            PointerEvent::Motion(event) => get_pointer_event::<PointerMotionEvent, KvmPointerMotionRelativeEvent>(event),
+            PointerEvent::MotionAbsolute(event) => get_pointer_event::<PointerMotionAbsoluteEvent, KvmPointerMotionAbsoluteEvent>(event),
             PointerEvent::Button(event) => get_pointer_event::<PointerButtonEvent, KvmPointerButtonEvent>(event),
             PointerEvent::ScrollWheel(event) => get_pointer_event::<PointerScrollWheelEvent, KvmPointerScrollEvent>(event),
             PointerEvent::ScrollFinger(event) => get_pointer_event::<PointerScrollFingerEvent, KvmPointerScrollEvent>(event),
@@ -64,9 +64,9 @@ fn get_pointer_event<T, U>(event: T) -> Result<KvmPointerEvent, MappingError>
     Ok(U::from_libinput(event)?.into_kvm_pointer_event())
 }
 
-impl FromLibinputEvent<PointerMotionEvent> for KvmPointerMotionEvent {
+impl FromLibinputEvent<PointerMotionEvent> for KvmPointerMotionRelativeEvent {
     fn from_libinput(event: PointerMotionEvent) -> Result<Self, MappingError> {
-        Ok(KvmPointerMotionEvent {
+        Ok(KvmPointerMotionRelativeEvent {
             dx: event.dx(),
             dx_unaccelerated: event.dx_unaccelerated(),
             dy: event.dy(),
@@ -75,9 +75,14 @@ impl FromLibinputEvent<PointerMotionEvent> for KvmPointerMotionEvent {
     }
 }
 
-impl FromLibinputEvent<PointerMotionAbsoluteEvent> for KvmPointerMotionEvent {
+impl FromLibinputEvent<PointerMotionAbsoluteEvent> for KvmPointerMotionAbsoluteEvent {
     fn from_libinput(event: PointerMotionAbsoluteEvent) -> Result<Self, MappingError> {
-        Err(UnsupportedEvent(event.into_event()))   // TODO
+        Ok(KvmPointerMotionAbsoluteEvent {
+            x: event.absolute_x_transformed(1920),
+            x_mm: event.absolute_x(),
+            y: event.absolute_y_transformed(1080),
+            y_mm: event.absolute_y(),
+        })
     }
 }
 

server/src/input/mod.rs

@@ -1,25 +1,26 @@
 use std::fs::{File, OpenOptions};
-use std::io;
-use std::os::fd::OwnedFd;
+use std::os::fd::{AsRawFd, OwnedFd};
 use std::os::unix::fs::OpenOptionsExt;
 use std::path::Path;
 
 use input::{Libinput, LibinputInterface};
 use input::Event;
-use input::Event::{Keyboard, Pointer};
-use input::event::keyboard::{KeyboardEventTrait, KeyState};
-use input::event::{KeyboardEvent, PointerEvent};
-use input::event::PointerEvent::{Button, Motion};
 use libc::{O_RDONLY, O_RDWR, O_WRONLY};
-use crate::input::events::keyboard::KvmKeyboardEvent;
-use crate::input::events::KvmEvent;
-use crate::input::events::pointer::{KvmPointerButtonEvent, KvmPointerMotionEvent};
-use crate::input::mappings::FromLibinputEvent;
+use linux::epoll::{Epoll, EpollFlags};
 
-mod events;
+use crate::input::events::KvmEvent;
+use crate::input::mappings::{FromLibinputEvent, MappingError};
+
+pub mod events;
 mod mappings;
 
 const UDEV_SEAT: &str = "seat0";
+const CLIENT_SWITCH_KEY_CODE: u32 = 100; // Alt Right
+
+pub struct InputSystem<S> {
+    sub_system: S,
+    epoll: Epoll,
+}
 
 struct Interface;
 
@@ -39,31 +40,108 @@ impl LibinputInterface for Interface {
     }
 }
 
-pub fn listen_inputs() -> io::Result<()> {
-    let input = prepare_libinput();
-    read_inputs(input)
+impl InputSystem<Libinput> {
+    pub fn new() -> Result<Self, LibinputSubsystemError> {
+        let mut libinput = prepare_libinput()?;
+        let epoll = create_epoll(&libinput)?;
+
+        Ok(Self {
+            sub_system: libinput,
+            epoll,
+        })
     }
 
-fn prepare_libinput() -> Libinput {
+    fn wait_for_events(&mut self) -> Result<(), LibinputSubsystemError> {
+        match self.epoll.wait() {
+            Ok(e) => self.dispatch(),
+            Err(e) => Err(LibinputSubsystemError::Polling(format!("Failed to wait for epoll: {}", e)))
+        }
+    }
+
+    fn dispatch(&mut self) -> Result<(), LibinputSubsystemError> {
+        let dispatch_result = self.sub_system.dispatch();
+        if dispatch_result.is_err() {
+            return Err(LibinputSubsystemError::Polling("Failed to dispatch libinput events".to_string()));
+        }
+
+        Ok(())
+    }
+}
+
+impl Iterator for InputSystem<Libinput> {
+    type Item = KvmEvent;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let mut next = self.sub_system.next();
+        if next.is_none() {
+            // Try to get more events
+            match self.wait_for_events() {
+                Ok(_) => {
+                    next = self.sub_system.next();
+                }
+                Err(e) => {
+                    println!("Failed to wait for events: {:?}", e);
+                }
+            }
+        }
+
+        match next {
+            Some(e) => {
+                match map_libinput_event(e) {
+                    Ok(e) => Some(e),
+                    Err(e) => {
+                        println!("Event failed: {:?}", e);
+                        None
+                    }
+                }
+            }
+            None => None
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum LibinputSubsystemError {
+    Initialization(String),
+    Polling(String),
+    Mapping(MappingError),
+}
+
+fn prepare_libinput() -> Result<Libinput, LibinputSubsystemError> {
     let mut input = Libinput::new_with_udev(Interface);
-    input.udev_assign_seat(UDEV_SEAT).unwrap();
-    input
+    match input.udev_assign_seat(UDEV_SEAT) {
+        Ok(_) => Ok(input),
+        Err(_) => Err(LibinputSubsystemError::Initialization("Failed to assign a seat to the libinput context".to_string()))
+    }
 }
 
-fn read_inputs(mut input: Libinput) -> io::Result<()> {
-    loop {
-        input.dispatch().unwrap();
-        for event in &mut input {
-            let mapping_result = KvmEvent::from_libinput(event);
-            if mapping_result.is_err() {
-                println!("Error: {:?}", &mapping_result.err());
-            } else {
-                let kvm_event = mapping_result.unwrap();
-                match kvm_event {
-                    KvmEvent::Keyboard(event) => println!("Key event: {} ({})", event.key_code, event.state),
-                    _ => {}
+fn create_epoll(input: &Libinput) -> Result<Epoll, LibinputSubsystemError> {
+    match Epoll::with_flags(&[EpollFlags::In]) {
+        Ok(epoll) => {
+            let interest = epoll.add_interest(input.as_raw_fd(), 0u64, &[]);
+            match interest {
+                Ok(_) => Ok(epoll),
+                Err(e) => Err(LibinputSubsystemError::Initialization(format!("Failed to add epoll interest: {}", e)))
             }
         }
+        Err(e) => Err(LibinputSubsystemError::Initialization(format!("Failed to create poll context: {}", e)))
     }
 }
+
+fn map_libinput_event(event: Event) -> Result<KvmEvent, LibinputSubsystemError> {
+    match KvmEvent::from_libinput(event) {
+        Err(error) => Err(LibinputSubsystemError::Mapping(error)),
+        Ok(mapped_event) => Ok(mapped_event)
+    }
+}
+
+fn intercept_client_switch_event(event: &KvmEvent) -> bool {
+    match event {
+        KvmEvent::Keyboard(event) if event.key_code == CLIENT_SWITCH_KEY_CODE => {
+            // Do stuff
+            println!("Right Alt key event");
+            false
+        }
+        _ => true
+    }
 }

server/src/main.rs

@@ -1,24 +1,46 @@
-use std::collections::VecDeque;
-use std::io;
+use std::collections::{HashMap, VecDeque};
+use std::fmt::Error;
+use std::{io, thread};
 use std::net::SocketAddr;
+use std::sync::mpsc;
 
 use messages::client_registration::ClientRegistration;
 use messages::serialization::{DeserializeMessage, read_message_data, SerializeMessage};
 
-use crate::input::{listen_inputs};
+use crate::input::{InputSystem, LibinputSubsystemError};
+use crate::input::events::KvmEvent;
+use crate::multi_index_queue::MultiIndexQueue;
 use crate::net::tcp_server::{NextIntent, TcpClient, TcpServer};
 
 mod net;
 mod input;
 mod client;
 
+mod multi_index_queue;
+
 fn main() -> io::Result<()> {
     // let addr = SocketAddr::from(([127, 0, 0, 1], 4433));
     // let mut server: TcpServer<KvmClient> = TcpServer::new(addr)?;
     //
     // server.listen()?;
 
-    listen_inputs()?;
+    let mut input_system = InputSystem::new().expect("Failed to initialize input system");
+
+    loop {
+        for event in &mut input_system {
+            println!("Received event: {}", event);
+        }
+    }
+
+    // let mut queue = MultiIndexQueue::new(Box::new(input_system));
+    // let mut index = queue.create_index();
+    //
+    // loop {
+    //     let next: Option<&KvmEvent> = queue.next(&mut index);
+    //     if next.is_some() {
+    //         println!("Received event: {}", next.unwrap());
+    //     }
+    // }
 
     Ok(())
 }

server/src/multi_index_queue.rs

@@ -0,0 +1,96 @@
+use std::cmp::Ordering;
+use std::collections::VecDeque;
+
+const QUEUE_CAPACITY: usize = 1000;
+
+pub struct MultiIndexQueue<T> {
+    iterator: Box<dyn Iterator<Item=T>>,
+    items: VecDeque<T>,
+    offset: usize,
+}
+
+#[derive(Eq)]
+pub struct QueueIndex {
+    index: usize,
+}
+
+impl<T> MultiIndexQueue<T> {
+    pub fn new(iterator: Box<dyn Iterator<Item=T>>) -> Self {
+        Self {
+            iterator,
+            items: VecDeque::with_capacity(QUEUE_CAPACITY),
+            offset: 0,
+        }
+    }
+
+    pub fn create_index(&self) -> QueueIndex {
+        QueueIndex { index: self.offset }
+    }
+
+    pub fn next(&mut self, index: &mut QueueIndex) -> Option<&T> {
+        if self.items.is_empty() {
+            self.fill_queue();
+        }
+
+        let real_index = index.index - self.offset;
+        if real_index > QUEUE_CAPACITY {
+            let next = self.fill_next();
+            index.index += 1;
+            return next;
+        }
+
+        let real_index = index.index - self.offset;
+        let item = self.items.get(real_index);
+        index.index += 1;
+
+        item
+    }
+
+    fn fill_queue(&mut self) {
+        let mut index = 0usize;
+        let initial_queue_len = self.items.len();
+
+        loop {
+            if initial_queue_len + index >= QUEUE_CAPACITY {
+                break;
+            }
+
+            if self.fill_next().is_none() {
+                break;
+            }
+
+            index += 1;
+        }
+    }
+
+    fn fill_next(&mut self) -> Option<&T> {
+        let next = self.iterator.next();
+        match next {
+            Some(next) => {
+                self.items.pop_front();
+                self.items.push_back(next);
+                self.offset += 1;
+                self.items.get(QUEUE_CAPACITY)
+            }
+            None => None
+        }
+    }
+}
+
+impl PartialOrd<Self> for QueueIndex {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Ord for QueueIndex {
+    fn cmp(&self, other: &Self) -> Ordering {
+        self.index.cmp(&other.index)
+    }
+}
+
+impl PartialEq<Self> for QueueIndex {
+    fn eq(&self, other: &Self) -> bool {
+        self.index == other.index
+    }
+}