debug: Add dbus interface to control debug prints

src/debug.rs

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2022 Purism SPC
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+use std::thread;
+use zbus::{Connection, ObjectServer, dbus_interface, fdo};
+
+use crate::event_loop;
+use crate::state;
+
+
+use std::convert::TryInto;
+
+
+/// Accepts commands controlling the debug mode
+struct Manager {
+    sender: event_loop::driver::Threaded,
+    enabled: bool,
+}
+
+#[dbus_interface(name = "sm.puri.SqueekDebug")]
+impl Manager {
+    #[dbus_interface(property, name = "Enabled")]
+    fn get_enabled(&self) -> bool {
+        self.enabled
+    }
+    #[dbus_interface(property, name = "Enabled")]
+    fn set_enabled(&mut self, enabled: bool) {
+        self.enabled = enabled;
+        self.sender
+            .send(state::Event::Debug(
+                if enabled { Event::Enable }
+                else { Event::Disable }
+            ))
+            .unwrap();
+    }
+}
+
+fn start(mgr: Manager) -> Result<(), Box<dyn std::error::Error>> {
+    let connection = Connection::new_session()?;
+    fdo::DBusProxy::new(&connection)?.request_name(
+        "sm.puri.SqueekDebug",
+        fdo::RequestNameFlags::ReplaceExisting.into(),
+    )?;
+
+    let mut object_server = ObjectServer::new(&connection);
+    object_server.at(&"/sm/puri/SqueekDebug".try_into()?, mgr)?;
+
+    loop {
+        if let Err(err) = object_server.try_handle_next() {
+            eprintln!("{}", err);
+        }
+    }
+}
+
+pub fn init(sender: event_loop::driver::Threaded) {
+    let mgr = Manager {
+        sender,
+        enabled: false,
+    };
+    thread::spawn(move || {
+        start(mgr).unwrap();
+    });
+}
+
+#[derive(Debug, Clone, Copy)]
+pub enum Event {
+    Enable,
+    Disable,
+}