Implement `is_speaking` For Speech-dispatcher.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "tts"
-version = "0.6.0"
+version = "0.6.1"
 authors = ["Nolan Darilek <nolan@thewordnerd.info>"]
 repository = "https://github.com/ndarilek/tts-rs"
 description = "High-level Text-To-Speech (TTS) interface"
@@ -12,6 +12,7 @@ edition = "2018"
 crate-type = ["lib", "staticlib"]
 
 [dependencies]
+lazy_static = "1"
 log = "0.4"
 thiserror = "1"
 
@@ -24,7 +25,7 @@ winrt = "0.7"
 tts_winrt_bindings = { version = "0.1", path="winrt_bindings" }
 
 [target.'cfg(target_os = "linux")'.dependencies]
-speech-dispatcher = "0.4"
+speech-dispatcher = "0.6"
 
 [target.'cfg(any(target_os = "macos", target_os = "ios"))'.dependencies]
 cocoa-foundation = "0.1"

src/backends/speech_dispatcher.rs

@@ -1,4 +1,8 @@
 #[cfg(target_os = "linux")]
+use std::collections::HashMap;
+use std::sync::Mutex;
+
+use lazy_static::*;
 use log::{info, trace};
 use speech_dispatcher::*;
 
@@ -6,11 +10,41 @@ use crate::{Backend, Error, Features};
 
 pub struct SpeechDispatcher(Connection);
 
+lazy_static! {
+    static ref SPEAKING: Mutex<HashMap<u64, bool>> = {
+        let m: HashMap<u64, bool> = HashMap::new();
+        Mutex::new(m)
+    };
+}
+
 impl SpeechDispatcher {
     pub fn new() -> Self {
         info!("Initializing SpeechDispatcher backend");
         let connection = speech_dispatcher::Connection::open("tts", "tts", "tts", Mode::Single);
-        SpeechDispatcher(connection)
+        let sd = SpeechDispatcher(connection);
+        let mut speaking = SPEAKING.lock().unwrap();
+        speaking.insert(sd.0.client_id(), false);
+        sd.0.on_begin(Some(|_msg_id, client_id| {
+            let mut speaking = SPEAKING.lock().unwrap();
+            speaking.insert(client_id, true);
+        }));
+        sd.0.on_end(Some(|_msg_id, client_id| {
+            let mut speaking = SPEAKING.lock().unwrap();
+            speaking.insert(client_id, false);
+        }));
+        sd.0.on_cancel(Some(|_msg_id, client_id| {
+            let mut speaking = SPEAKING.lock().unwrap();
+            speaking.insert(client_id, false);
+        }));
+        sd.0.on_pause(Some(|_msg_id, client_id| {
+            let mut speaking = SPEAKING.lock().unwrap();
+            speaking.insert(client_id, false);
+        }));
+        sd.0.on_resume(Some(|_msg_id, client_id| {
+            let mut speaking = SPEAKING.lock().unwrap();
+            speaking.insert(client_id, true);
+        }));
+        sd
     }
 }
 
@@ -21,7 +55,7 @@ impl Backend for SpeechDispatcher {
             rate: true,
             pitch: true,
             volume: true,
-            is_speaking: false,
+            is_speaking: true,
         }
     }
 
@@ -111,6 +145,15 @@ impl Backend for SpeechDispatcher {
     }
 
     fn is_speaking(&self) -> Result<bool, Error> {
-        unimplemented!()
+        let speaking = SPEAKING.lock().unwrap();
+        let is_speaking = speaking.get(&self.0.client_id()).unwrap();
+        Ok(*is_speaking)
+    }
+}
+
+impl Drop for SpeechDispatcher {
+    fn drop(&mut self) {
+        let mut speaking = SPEAKING.lock().unwrap();
+        speaking.remove(&self.0.client_id());
     }
 }