initial x11 support

src/backend.rs

@@ -1,2 +1,3 @@
 pub mod windows;
 pub mod wayland;
+pub mod x11;

src/backend/x11.rs

@@ -0,0 +1,2 @@
+pub mod consumer;
+pub mod producer;

src/backend/x11/consumer.rs

@@ -0,0 +1,45 @@
+#![cfg(unix)]
+use std::{sync::mpsc::Receiver, ptr};
+use x11::{xtest, xlib};
+
+use crate::{client::{ClientHandle, Client}, event::Event};
+
+fn open_display() -> Option<*mut xlib::Display> {
+    unsafe {
+        match xlib::XOpenDisplay(ptr::null()) {
+            d if d == ptr::null::<xlib::Display>() as *mut xlib::Display => None,
+            display => Some(display),
+        }
+    }
+}
+
+fn relative_motion(display: *mut xlib::Display, dx: i32, dy: i32) {
+    unsafe {
+        xtest::XTestFakeRelativeMotionEvent(display, dx, dy, 0, 0);
+        xlib::XFlush(display);
+    }
+}
+
+pub fn run(event_rx: Receiver<(Event, ClientHandle)>, _clients: Vec<Client>) {
+    let display = match open_display() {
+        None => panic!("could not open display!"),
+        Some(display) => display,
+    };
+
+    loop {
+        match event_rx.recv().expect("event receiver unavailable").0 {
+            Event::Pointer(pointer_event) => {
+                match pointer_event {
+                    crate::event::PointerEvent::Motion { time: _, relative_x, relative_y } => {
+                        relative_motion(display, relative_x as i32, relative_y as i32);
+                    },
+                    crate::event::PointerEvent::Button { .. } => todo!(),
+                    crate::event::PointerEvent::Axis { .. } => todo!(),
+                    crate::event::PointerEvent::Frame {  } => todo!(),
+                }
+            },
+            Event::Keyboard(_) => todo!(),
+            Event::Release() => todo!(),
+        }
+    }
+}