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talkie-progress.js
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talkie-progress.js
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/*
This file is part of Talkie -- text-to-speech browser extension button.
<https://joelpurra.com/projects/talkie/>
Copyright (c) 2016, 2017, 2018, 2019, 2020, 2021 Joel Purra <https://joelpurra.com/>
Talkie is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Talkie is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Talkie. If not, see <https://www.gnu.org/licenses/>.
*/
import {
knownEvents,
} from "./events";
export default class TalkieProgress {
constructor(broadcaster, min, max, current) {
this.broadcaster = broadcaster;
this.interval = null;
this.intervalDelay = 100;
this.minSpeed = 0.015;
this.resetProgress(min, max, current);
}
getEventData() {
const eventData = {
min: this.min,
max: this.max,
current: this.current,
};
return eventData;
}
broadcastEvent(eventName) {
const eventData = this.getEventData();
return this.broadcaster.broadcastEvent(eventName, eventData);
}
getPercent() {
if (this.max === 0) {
return 0;
}
const pct = (this.current / this.max) * 100;
return pct;
}
updateProgress() {
this.broadcastEvent(knownEvents.updateProgress);
}
resetProgress(min, max, current) {
const now = Date.now();
this.resetTime = now;
this.min = min || 0;
this.max = max || 0;
this.current = current || 0;
this.segmentSum = this.min;
// this.segments = [];
this.broadcastEvent(knownEvents.resetProgress);
this.updateProgress();
}
addProgress(n) {
const segmentLimited = Math.min(this.segmentSum, this.current + n);
this.current = segmentLimited;
this.broadcastEvent(knownEvents.addProgress);
this.updateProgress();
}
getSpeed() {
const now = Date.now();
const timeDiff = now - this.resetTime;
if (timeDiff === 0) {
return this.minSpeed;
}
const speed = this.current / timeDiff;
const adjustedSpeed = Math.max(speed, this.minSpeed);
return adjustedSpeed;
}
intervalIncrement() {
const now = Date.now();
const intervalDiff = now - this.previousInterval;
const speed = this.getSpeed();
const increment = intervalDiff * speed;
this.previousInterval = now;
this.addProgress(increment);
}
startSegment(n) {
const now = Date.now();
this.previousInterval = now;
this.segmentSum += n;
this.interval = setInterval(() => this.intervalIncrement(), this.intervalDelay);
}
endSegment() {
clearInterval(this.interval);
this.interval = null;
this.current = this.segmentSum;
this.updateProgress();
}
finishProgress() {
this.current = this.max;
this.broadcastEvent(knownEvents.finishProgress);
this.updateProgress();
}
}