tts 0.26.3

High-level Text-To-Speech (TTS) interface
Documentation 
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#[cfg(all(windows, feature = "tolk"))]
use std::sync::Arc;

use log::{info, trace};
use tolk::Tolk as TolkPtr;

use crate::{Backend, BackendId, Error, Features, UtteranceId, Voice};

#[derive(Clone, Debug)]
pub(crate) struct Tolk(Arc<TolkPtr>);

impl Tolk {
    pub(crate) fn new() -> Option<Self> {
        info!("Initializing Tolk backend");
        let tolk = TolkPtr::new();
        if tolk.detect_screen_reader().is_some() {
            Some(Tolk(tolk))
        } else {
            None
        }
    }
}

impl Backend for Tolk {
    fn id(&self) -> Option<BackendId> {
        None
    }

    fn supported_features(&self) -> Features {
        Features {
            stop: true,
            ..Default::default()
        }
    }

    fn speak(&mut self, text: &str, interrupt: bool) -> Result<Option<UtteranceId>, Error> {
        trace!("speak({}, {})", text, interrupt);
        self.0.speak(text, interrupt);
        Ok(None)
    }

    fn stop(&mut self) -> Result<(), Error> {
        trace!("stop()");
        self.0.silence();
        Ok(())
    }

    fn min_rate(&self) -> f32 {
        unimplemented!()
    }

    fn max_rate(&self) -> f32 {
        unimplemented!()
    }

    fn normal_rate(&self) -> f32 {
        unimplemented!()
    }

    fn get_rate(&self) -> Result<f32, Error> {
        unimplemented!();
    }

    fn set_rate(&mut self, _rate: f32) -> Result<(), Error> {
        unimplemented!();
    }

    fn min_pitch(&self) -> f32 {
        unimplemented!()
    }

    fn max_pitch(&self) -> f32 {
        unimplemented!()
    }

    fn normal_pitch(&self) -> f32 {
        unimplemented!()
    }

    fn get_pitch(&self) -> Result<f32, Error> {
        unimplemented!();
    }

    fn set_pitch(&mut self, _pitch: f32) -> Result<(), Error> {
        unimplemented!();
    }

    fn min_volume(&self) -> f32 {
        unimplemented!()
    }

    fn max_volume(&self) -> f32 {
        unimplemented!()
    }

    fn normal_volume(&self) -> f32 {
        unimplemented!()
    }

    fn get_volume(&self) -> Result<f32, Error> {
        unimplemented!();
    }

    fn set_volume(&mut self, _volume: f32) -> Result<(), Error> {
        unimplemented!();
    }

    fn is_speaking(&self) -> Result<bool, Error> {
        unimplemented!()
    }

    fn voice(&self) -> Result<Option<Voice>, Error> {
        unimplemented!()
    }

    fn voices(&self) -> Result<Vec<Voice>, Error> {
        unimplemented!()
    }

    fn set_voice(&mut self, _voice: &Voice) -> Result<(), Error> {
        unimplemented!()
    }
}