autocommit 2022-03-09 14:01:21 CET

src/backends/metal/monitor.rs

@@ -0,0 +1,131 @@
+use crate::async_engine::FdStatus;
+use crate::dbus::TRUE;
+use crate::metal::{MetalBackend, MetalDevice, MetalError};
+use crate::udev::UdevDevice;
+use crate::ErrorFmt;
+use std::rc::Rc;
+
+impl MetalBackend {
+    pub async fn monitor_devices(self: Rc<Self>) {
+        loop {
+            match self.monitor_fd.readable().await {
+                Err(e) => {
+                    log::error!(
+                        "Cannot wait for udev_monitor to become readable: {}",
+                        ErrorFmt(e)
+                    );
+                    break;
+                }
+                Ok(FdStatus::Err) => {
+                    log::error!("udev_monitor fd is in an error state");
+                    break;
+                }
+                _ => {}
+            }
+            while let Some(dev) = self.monitor.receive_device() {
+                log::info!("x {:?}", dev.devnode());
+            }
+        }
+        log::error!("Monitor task exited. Future hotplug events will be ignored.");
+    }
+
+    pub fn enumerate_devices(self: &Rc<Self>) -> Result<(), MetalError> {
+        let mut enumerate = self.udev.create_enumerate()?;
+        enumerate.add_match_subsystem("input")?;
+        enumerate.scan_devices()?;
+        let mut entry_opt = enumerate.get_list_entry()?;
+        while let Some(entry) = entry_opt.take() {
+            'inner: {
+                let device = match self.udev.create_device_from_syspath(entry.name()) {
+                    Ok(d) => d,
+                    _ => break 'inner,
+                };
+                let sysname = match device.sysname() {
+                    Ok(s) => s,
+                    _ => break 'inner,
+                };
+                if sysname.to_bytes().starts_with(b"event") {
+                    self.add_input_device(&device);
+                }
+            }
+            entry_opt = entry.next();
+        }
+        Ok(())
+    }
+
+    fn add_input_device(self: &Rc<Self>, dev: &UdevDevice) {
+        let slf = self.clone();
+        let device_id = self.id();
+        let devnum = dev.devnum();
+        let devnode = match dev.devnode() {
+            Ok(n) => n,
+            Err(e) => {
+                log::error!("Could not retrieve devnode of udev device: {}", ErrorFmt(e));
+                return;
+            }
+        };
+        let sysname = match dev.sysname() {
+            Ok(n) => n,
+            Err(e) => {
+                log::error!("Could not retrieve sysname of udev device: {}", ErrorFmt(e));
+                return;
+            }
+        };
+        let mut slots = self.device_holder.input_devices_.borrow_mut();
+        let slot = 'slot: {
+            for (i, s) in slots.iter().enumerate() {
+                if s.is_none() {
+                    break 'slot i;
+                }
+            }
+            slots.push(None);
+            slots.len() - 1
+        };
+        let dev = Rc::new(MetalDevice {
+            slot,
+            device_id,
+            devnum,
+            fd: Default::default(),
+            inputdev: Default::default(),
+            devnode: devnode.to_owned(),
+            sysname: sysname.to_owned(),
+        });
+        slots[slot] = Some(dev.clone());
+        self.device_holder.input_devices.set(devnum, dev);
+        self.session.get_device(devnum, move |res| {
+            let id = &slf.device_holder.input_devices;
+            let mut slots = slf.device_holder.input_devices_.borrow_mut();
+            let dev = 'dev: {
+                if let Some(dev) = id.get(&devnum) {
+                    if dev.device_id == device_id {
+                        break 'dev dev;
+                    }
+                }
+                return;
+            };
+            let res = match res {
+                Ok(r) => r,
+                Err(e) => {
+                    log::error!("Could not take control of input device: {}", ErrorFmt(e));
+                    slots[dev.slot] = None;
+                    id.remove(&devnum);
+                    return;
+                }
+            };
+            if res.inactive == TRUE {
+                return;
+            }
+            dev.fd.set(Some(res.fd.clone()));
+            let inputdev = match slf.libinput.open(dev.devnode.as_c_str()) {
+                Ok(d) => d,
+                Err(_) => {
+                    slots[dev.slot] = None;
+                    id.remove(&devnum);
+                    return;
+                }
+            };
+            inputdev.device().set_slot(slot);
+            dev.inputdev.set(Some(inputdev));
+        });
+    }
+}