/
speech_to_text.ts
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/
speech_to_text.ts
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import * as p from "@bokehjs/core/properties"
import { HTMLBox, HTMLBoxView } from "./layout"
const iconStarted = `<svg xmlns="http://www.w3.org/2000/svg" height="22px" style="vertical-align: middle;" fill="currentColor" class="bi bi-mic" viewBox="0 0 16 16">
<path fill-rule="evenodd" d="M3.5 6.5A.5.5 0 0 1 4 7v1a4 4 0 0 0 8 0V7a.5.5 0 0 1 1 0v1a5 5 0 0 1-4.5 4.975V15h3a.5.5 0 0 1 0 1h-7a.5.5 0 0 1 0-1h3v-2.025A5 5 0 0 1 3 8V7a.5.5 0 0 1 .5-.5z"/>
<path fill-rule="evenodd" d="M10 8V3a2 2 0 1 0-4 0v5a2 2 0 1 0 4 0zM8 0a3 3 0 0 0-3 3v5a3 3 0 0 0 6 0V3a3 3 0 0 0-3-3z"/>
</svg>`
const iconNotStarted = `<svg xmlns="http://www.w3.org/2000/svg" height="22px" style="vertical-align: middle;" fill="currentColor" class="bi bi-mic-mute" viewBox="0 0 16 16">
<path fill-rule="evenodd" d="M12.734 9.613A4.995 4.995 0 0 0 13 8V7a.5.5 0 0 0-1 0v1c0 .274-.027.54-.08.799l.814.814zm-2.522 1.72A4 4 0 0 1 4 8V7a.5.5 0 0 0-1 0v1a5 5 0 0 0 4.5 4.975V15h-3a.5.5 0 0 0 0 1h7a.5.5 0 0 0 0-1h-3v-2.025a4.973 4.973 0 0 0 2.43-.923l-.718-.719zM11 7.88V3a3 3 0 0 0-5.842-.963l.845.845A2 2 0 0 1 10 3v3.879l1 1zM8.738 9.86l.748.748A3 3 0 0 1 5 8V6.121l1 1V8a2 2 0 0 0 2.738 1.86zm4.908 3.494l-12-12 .708-.708 12 12-.708.707z"/>
</svg>`
const titleStarted = "Click to STOP the speech recognition.";
const titleNotStarted = "Click to START the speech recognition.";
// Hack inspired by https://stackoverflow.com/questions/38087013/angular2-web-speech-api-voice-recognition
interface IWindow extends Window {
webkitSpeechRecognition: any;
webkitSpeechGrammarList: any;
}
const {webkitSpeechRecognition} : IWindow = <IWindow><unknown>window;
const {webkitSpeechGrammarList} : IWindow = <IWindow><unknown>window;
function htmlToElement(html: string) {
var template = document.createElement('template');
html = html.trim(); // Never return a text node of whitespace as the result
template.innerHTML = html;
return <HTMLElement>template.content.firstChild;
}
function deserializeGrammars(grammars: any[]){
if (grammars) {
var speechRecognitionList = new webkitSpeechGrammarList();
for (let grammar of grammars){
if (grammar.src)
speechRecognitionList.addFromString(grammar.src, grammar.weight)
else if (grammar.uri)
speechRecognitionList.addFromURI(grammar.uri, grammar.weight)
}
return speechRecognitionList
} else
return null
}
function round(value: number) {
return Math.round((value + Number.EPSILON) * 100) / 100
}
function serializeResults(results_: any) {
const results = [];
for (let result of results_) {
let alternatives: { confidence: number; transcript: string; }[] = [];
let item = { is_final: result.isFinal, alternatives: alternatives };
for (let i = 0; i < result.length; i++) {
let alternative = {
confidence: round(result[i].confidence),
transcript: result[i].transcript
};
alternatives.push(alternative)
}
item.alternatives = alternatives
results.push(item)
}
return results
}
export class SpeechToTextView extends HTMLBoxView {
model: SpeechToText
recognition: any
buttonEl: HTMLElement
initialize(): void {
super.initialize()
this.recognition = new webkitSpeechRecognition();
this.recognition.lang = this.model.lang;
this.recognition.continuous = this.model.continuous;
this.recognition.interimResults = this.model.interim_results;
this.recognition.maxAlternatives = this.model.max_alternatives;
this.recognition.serviceURI = this.model.service_uri;
this.setGrammars()
this.recognition.onresult = (event: any) => {
this.model.results = serializeResults(event.results)
}
this.recognition.onerror = (event: any) => {
console.log("SpeechToText Error")
console.log(event);
}
this.recognition.onnomatch = (event: any) => {
console.log("SpeechToText No Match")
console.log(event)
}
this.recognition.onaudiostart = () => this.model.audio_started = true
this.recognition.onaudioend = () => this.model.audio_started = false
this.recognition.onsoundstart = () => this.model.sound_started = true
this.recognition.onsoundend = () => this.model.sound_started = false
this.recognition.onspeechstart = () => this.model.speech_started=true
this.recognition.onspeechend = () => this.model.speech_started=false
this.recognition.onstart = () => {
this.buttonEl.onclick = () => {this.recognition.stop()}
this.buttonEl.innerHTML = this.iconStarted();
this.buttonEl.setAttribute("title", titleStarted);
this.model.started = true;
}
this.recognition.onend = () => {
this.buttonEl.onclick = () => { this.recognition.start() }
this.buttonEl.innerHTML = this.iconNotStarted();
this.buttonEl.setAttribute("title", titleNotStarted);
this.model.started = false;
}
this.buttonEl = htmlToElement(`<button class="bk bk-btn bk-btn-${this.model.button_type}" type="button" title="${titleNotStarted}"></button>`)
this.buttonEl.innerHTML = this.iconNotStarted()
this.buttonEl.onclick = () => this.recognition.start()
}
iconStarted(): string {
if (this.model.button_started!=='')
return this.model.button_started
else
return iconStarted
}
iconNotStarted(): string {
if (this.model.button_not_started!=='')
return this.model.button_not_started
else
return iconNotStarted
}
setIcon(): void {
if (this.model.started)
this.buttonEl.innerHTML = this.iconStarted()
else
this.buttonEl.innerHTML = this.iconNotStarted()
}
connect_signals(): void {
super.connect_signals()
this.connect(this.model.properties.start.change, () => {
this.model.start = false
this.recognition.start()
})
this.connect(this.model.properties.stop.change, () => {
this.model.stop = false
this.recognition.stop()
})
this.connect(this.model.properties.abort.change, () => {
this.model.abort = false
this.recognition.abort()
})
this.connect(this.model.properties.grammars.change, () => this.setGrammars())
this.connect(this.model.properties.lang.change, () => this.recognition.lang = this.model.lang)
this.connect(this.model.properties.continuous.change, () => this.recognition.continuous = this.model.continuous)
this.connect(this.model.properties.interim_results.change, () => this.recognition.interimResults = this.model.interim_results)
this.connect(this.model.properties.max_alternatives.change, () => this.recognition.maxAlternatives = this.model.max_alternatives)
this.connect(this.model.properties.service_uri.change, () => this.recognition.serviceURI = this.model.service_uri)
this.connect(this.model.properties.button_type.change, () => this.buttonEl.className = `bk bk-btn bk-btn-${this.model.button_type}`)
this.connect(this.model.properties.button_hide.change, () => this.render())
const {button_not_started, button_started} = this.model.properties
this.on_change([button_not_started, button_started], () => this.setIcon())
}
setGrammars(): void {
this.recognition.grammars = deserializeGrammars(this.model.grammars);
}
render(): void {
super.render()
if (!this.model.button_hide)
this.shadow_el.appendChild(this.buttonEl)
}
}
export namespace SpeechToText {
export type Attrs = p.AttrsOf<Props>
export type Props = HTMLBox.Props & {
start: p.Property<boolean>
stop: p.Property<boolean>
abort: p.Property<boolean>
grammars: p.Property<any[]>
lang: p.Property<string>
continuous: p.Property<boolean>
interim_results: p.Property<boolean>
max_alternatives: p.Property<number>
service_uri: p.Property<string>
started: p.Property<boolean>
audio_started: p.Property<boolean>
sound_started: p.Property<boolean>
speech_started: p.Property<boolean>
button_type: p.Property<string>
button_hide: p.Property<boolean>
button_not_started: p.Property<string>
button_started: p.Property<string>
results: p.Property<any[]>
}
}
export interface SpeechToText extends SpeechToText.Attrs {}
export class SpeechToText extends HTMLBox {
properties: SpeechToText.Props
constructor(attrs?: Partial<SpeechToText.Attrs>) {
super(attrs)
}
static __module__ = "panel.models.speech_to_text"
static {
this.prototype.default_view = SpeechToTextView
this.define<SpeechToText.Props>(({Any, Array, Boolean, Number, String}) => ({
start: [ Boolean, false ],
stop: [ Boolean, false ],
abort: [ Boolean, false ],
grammars: [ Array(Any), [] ],
lang: [ String, '' ],
continuous: [ Boolean, false ],
interim_results: [ Boolean, false ],
max_alternatives: [ Number, 1 ],
service_uri: [ String, '' ],
started: [ Boolean, false ],
audio_started: [ Boolean, false ],
sound_started: [ Boolean, false ],
speech_started: [ Boolean, false ],
button_type: [ String, 'light' ],
button_hide: [ Boolean, false ],
button_not_started: [ String, '' ],
button_started: [ String, '' ],
results: [ Array(Any), [] ],
}))
}
}