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media-overlays.ts
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// ==LICENSE-BEGIN==
// Copyright 2017 European Digital Reading Lab. All rights reserved.
// Licensed to the Readium Foundation under one or more contributor license agreements.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file exposed on Github (readium) in the project repository.
// ==LICENSE-END==
import * as debug_ from "debug";
import * as util from "util";
import { getCurrentReadingLocation } from "./location";
import { TaJsonDeserialize } from "@r2-lcp-js/serializable";
import { MediaOverlayNode } from "@r2-shared-js/models/media-overlay";
import { Publication } from "@r2-shared-js/models/publication";
import { Link } from "@r2-shared-js/models/publication-link";
import { DEBUG_AUDIO } from "../common/audiobook";
import {
IEventPayload_R2_EVENT_MEDIA_OVERLAY_CLICK, IEventPayload_R2_EVENT_MEDIA_OVERLAY_HIGHLIGHT,
IEventPayload_R2_EVENT_MEDIA_OVERLAY_STATE, R2_EVENT_MEDIA_OVERLAY_STATE, MediaOverlaysStateEnum as MediaOverlaysStateEnum_,
IEventPayload_R2_EVENT_MEDIA_OVERLAY_STARTSTOP, R2_EVENT_MEDIA_OVERLAY_CLICK,
R2_EVENT_MEDIA_OVERLAY_HIGHLIGHT, R2_EVENT_MEDIA_OVERLAY_STARTSTOP, IEventPayload_R2_EVENT_READING_LOCATION,
} from "../common/events";
import { handleLinkUrl, navPreviousOrNext } from "./location";
import { ReadiumElectronBrowserWindow, IReadiumElectronWebview } from "./webview/state";
// export enum MediaOverlaysStateEnum {
// PAUSED = "PAUSED",
// PLAYING = "PLAYING",
// STOPPED = "STOPPED",
// }
export { MediaOverlaysStateEnum_ as MediaOverlaysStateEnum };
// import { READIUM2_ELECTRON_HTTP_PROTOCOL, convertCustomSchemeToHttpUrl } from "../common/sessions";
const debug = debug_("r2:navigator#electron/renderer/media-overlays");
const IS_DEV = process.env.NODE_ENV === "development" || process.env.NODE_ENV === "dev";
const win = global.window as ReadiumElectronBrowserWindow;
const AUDIO_MO_ID = "R2_AUDIO_MO_ID";
export function publicationHasMediaOverlays(publication: Publication) {
if (publication.Spine) {
const firstMoLink = publication.Spine.find((link) => {
if (link.Properties?.MediaOverlay) {
return true;
}
if (link.Alternate) {
for (const altLink of link.Alternate) {
if (altLink.TypeLink === "application/vnd.syncnarr+json") {
return true;
}
}
}
return false;
});
if (firstMoLink) {
return true;
}
}
return false;
}
let _captionsMode = false;
let _mediaOverlaysClickEnabled = false;
let _mediaOverlaysPlaybackRate = 1;
// URL without t=begin,end media fragment! (pure audio reference)
let _currentAudioUrl: string | undefined;
let _previousAudioUrl: string | undefined;
let _currentAudioBegin: number | undefined;
// let _previousAudioBegin: number | undefined;
let _currentAudioEnd: number | undefined;
let _previousAudioEnd: number | undefined;
let _currentAudioElement: HTMLAudioElement | undefined;
let _mediaOverlayRoot: MediaOverlayNode | undefined;
let _mediaOverlayTextAudioPair: MediaOverlayNode | undefined;
let _mediaOverlayTextId: string | undefined;
let _mediaOverlayTextHref: string | undefined;
let _mediaOverlayActive = false;
async function playMediaOverlays(
textHref: string,
rootMo: MediaOverlayNode,
textFragmentIDChain: Array<string | null> | undefined,
isInteract: boolean) {
if (IS_DEV) {
debug("playMediaOverlays() : " + textHref + " //// " + decodeURIComponent(textHref));
debug(JSON.stringify(textFragmentIDChain, null, 4));
}
const loc = getCurrentReadingLocation();
const locationHashOverrideInfo = _lastClickedNotification?.locationHashOverrideInfo;
if (!textFragmentIDChain) {
if (loc) {
if (IS_DEV) {
debug("playMediaOverlays() CURRENT LOCATOR " + textHref + " -- " + loc.locator?.href);
debug(JSON.stringify(loc, null, 4));
}
const hrefUrlObj = new URL("https://dummy.com/" + loc.locator?.href);
if (textHref === hrefUrlObj.pathname.substr(1)) { // includes leading slash
if (loc.locator.locations?.cssSelector) {
debug("playMediaOverlays() CSS SELECTOR: " + loc.locator.locations.cssSelector);
const hashI = loc.locator.locations.cssSelector.lastIndexOf("#");
if (hashI >= 0) {
const after = loc.locator.locations.cssSelector.substring(hashI + 1);
if (after) {
const spaceI = after.indexOf(" ");
let hashID = after;
if (spaceI > 0) {
hashID = after.substring(0, spaceI);
}
debug("playMediaOverlays() CSS SELECTOR ID: " + hashID);
// textFragmentIDChain = [hashID];
}
}
}
if (loc.locator.locations?.cfi) {
debug("playMediaOverlays() CFI: " + loc.locator.locations.cfi);
let arrayIDs: string[] = [];
const regexpr = /\[([^\]]+)\]/g;
const matches = loc.locator.locations.cfi.matchAll(regexpr);
// debug("playMediaOverlays() CFI MATCHES: " + JSON.stringify(matches, null, 4));
if (matches) {
arrayIDs = Array.from(matches, (m) => m[1]);
}
// let match;
// while (match = regexpr.exec(loc.locator.locations.cfi)) {
// arrayIDs.push(match[1]);
// }
debug("playMediaOverlays() CFI IDs: " + JSON.stringify(arrayIDs, null, 4));
textFragmentIDChain = arrayIDs;
}
}
}
}
let textFragmentIDChain_: Array<string> | undefined | null = textFragmentIDChain ? textFragmentIDChain.filter((id) => id) as Array<string> : undefined;
if (textFragmentIDChain_ && textFragmentIDChain_.length === 0) {
textFragmentIDChain_ = null;
}
let moTextAudioPair = findDepthFirstTextAudioPair(textHref, rootMo, textFragmentIDChain_, false);
if (!moTextAudioPair && (textFragmentIDChain_ || textFragmentIDChain_ === null && !isInteract)) {
const followingElementIDs = loc?.followingElementIDs || locationHashOverrideInfo?.followingElementIDs;
if (followingElementIDs) {
if (IS_DEV) {
debug("playMediaOverlays() - findDepthFirstTextAudioPair() SECOND CHANCE TRY ... ");
debug(JSON.stringify(textFragmentIDChain_, null, 4));
debug(JSON.stringify(followingElementIDs, null, 4));
}
for (const id of followingElementIDs) {
moTextAudioPair = findDepthFirstTextAudioPair(textHref, rootMo, [id], false);
if (moTextAudioPair) {
debug("playMediaOverlays() - findDepthFirstTextAudioPair() SECOND CHANCE FOUND: " + id);
break;
}
}
}
if (!moTextAudioPair) {
debug("playMediaOverlays() - findDepthFirstTextAudioPair() SECOND CHANCE FALLBACK...");
moTextAudioPair = findDepthFirstTextAudioPair(textHref, rootMo, textFragmentIDChain_, true);
}
// if (textFragmentIDChain) {
// if (IS_DEV) {
// debug("playMediaOverlays() - findDepthFirstTextAudioPair() SECOND CHANCE SKIP (jump back to body begin not desirable)");
// debug(JSON.stringify(textFragmentIDChain, null, 4));
// debug(JSON.stringify(textFragmentIDChain_, null, 4));
// }
// } else {
// if (IS_DEV) {
// debug("playMediaOverlays() - findDepthFirstTextAudioPair() SECOND CHANCE ");
// debug(JSON.stringify(textFragmentIDChain_, null, 4));
// debug(JSON.stringify(rootMo, null, 4));
// }
// moTextAudioPair = findDepthFirstTextAudioPair(textHref, rootMo, undefined);
// }
}
if (moTextAudioPair) {
if (moTextAudioPair.Audio || moTextAudioPair.Video) {
if (IS_DEV) {
debug("playMediaOverlays() - playMediaOverlaysAudio()");
}
_mediaOverlayRoot = rootMo;
await playMediaOverlaysAudio(moTextAudioPair, undefined, undefined);
mediaOverlaysStateSet(MediaOverlaysStateEnum_.PLAYING);
}
} else {
if (IS_DEV) {
debug("playMediaOverlays() - !moTextAudioPair " + textHref);
}
}
}
const ontimeupdate = async (ev: Event) => {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if (_currentAudioElement && (_currentAudioElement as any).__draggable && (_currentAudioElement as any).__hidden) {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(_currentAudioElement as any).__hidden = false;
_currentAudioElement.style.display = "block";
}
const currentAudioElement = ev.currentTarget as HTMLAudioElement;
if (_currentAudioEnd && currentAudioElement.currentTime >= (_currentAudioEnd - 0.05)) {
if (IS_DEV) {
debug("ontimeupdate - mediaOverlaysNext()");
}
mediaOverlaysNext();
}
};
const ensureOnTimeUpdate = (remove: boolean) => {
if (_currentAudioElement) {
if (remove) {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if ((_currentAudioElement as any).__ontimeupdate) {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(_currentAudioElement as any).__ontimeupdate = false;
_currentAudioElement.removeEventListener("timeupdate", ontimeupdate);
}
} else {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if (!(_currentAudioElement as any).__ontimeupdate) {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(_currentAudioElement as any).__ontimeupdate = true;
_currentAudioElement.addEventListener("timeupdate", ontimeupdate);
}
}
}
};
function ensureVideoFrameDraggable() {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if (!_currentAudioElement || (_currentAudioElement as any).__draggable) {
return;
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(_currentAudioElement as any).__draggable = true;
let moveDiv: HTMLDivElement | undefined;
let pos1 = 0;
let pos2 = 0;
let pos3 = 0;
let pos4 = 0;
let mouseDownX = 0;
let mouseDownY = 0;
if (document.pictureInPictureEnabled) {
_currentAudioElement.addEventListener("enterpictureinpicture", async () => {
if (!_currentAudioElement) {
return;
}
_currentAudioElement.style.opacity = "0.2";
_currentAudioElement.style.width = "1px";
_currentAudioElement.style.height = "1px";
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(_currentAudioElement as any).__previousStyleTop = _currentAudioElement.style.top;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(_currentAudioElement as any).__previousStyleLeft = _currentAudioElement.style.left;
_currentAudioElement.style.top = "0px";
_currentAudioElement.style.left = "0px";
});
_currentAudioElement.addEventListener("leavepictureinpicture", async () => {
if (!_currentAudioElement) {
return;
}
_currentAudioElement.style.opacity = "1";
_currentAudioElement.style.width = "auto";
_currentAudioElement.style.height = "auto";
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if ((_currentAudioElement as any).__previousStyleTop) {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
_currentAudioElement.style.top = (_currentAudioElement as any).__previousStyleTop;
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if ((_currentAudioElement as any).__previousStyleLeft) {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
_currentAudioElement.style.left = (_currentAudioElement as any).__previousStyleLeft;
}
});
// _currentAudioElement.addEventListener("click", async () => {
// }, true);
}
_currentAudioElement.addEventListener("mousedown", elMouseDown);
_currentAudioElement.addEventListener("mouseup", elMouseUp);
async function elMouseUp(e: MouseEvent) {
const _mouseDownX = mouseDownX;
const _mouseDownY = mouseDownY;
mouseDownX = 0;
mouseDownY = 0;
if (!_currentAudioElement) {
docMouseUp();
return;
}
e.preventDefault();
e.stopPropagation();
if (!_currentAudioElement || !document.pictureInPictureEnabled) {
return;
}
// CLICK
if (Math.abs(_mouseDownX - e.clientX) <= 4 && Math.abs(_mouseDownY - e.clientY) <= 4) {
try {
if (_currentAudioElement !== document.pictureInPictureElement) {
await (_currentAudioElement as HTMLVideoElement).requestPictureInPicture();
} else {
await document.exitPictureInPicture();
}
} catch (err) {
console.log("VIDEO PiP Error:", err);
}
}
};
function elMouseDown(e: MouseEvent) {
if (!_currentAudioElement) {
docMouseUp();
return;
}
e.preventDefault();
e.stopPropagation();
mouseDownX = e.clientX;
mouseDownY = e.clientY;
pos3 = e.clientX;
pos4 = e.clientY;
if (moveDiv?.parentNode) {
moveDiv.parentNode.removeChild(moveDiv);
moveDiv = undefined;
}
moveDiv = document.createElement("div");
moveDiv.setAttribute("style", "display: block; position: absolute; padding: 0; margin: 0; left: 0; top: 0; right: 0; bottom: 0; z-index: 9998; cursor: move; opacity: 0.4; background-color: black;");
document.body.insertBefore(moveDiv, _currentAudioElement);
document.body.addEventListener("mouseup", docMouseUp, true);
document.body.addEventListener("mousemove", docMouseMove, true);
}
function docMouseMove(e: MouseEvent) {
if (!_currentAudioElement) {
docMouseUp();
return;
}
e.preventDefault();
e.stopPropagation();
pos1 = pos3 - e.clientX;
pos2 = pos4 - e.clientY;
pos3 = e.clientX;
pos4 = e.clientY;
_currentAudioElement.style.top = (_currentAudioElement.offsetTop - pos2) + "px";
_currentAudioElement.style.left = (_currentAudioElement.offsetLeft - pos1) + "px";
}
function docMouseUp(e: MouseEvent | undefined = undefined) {
if (e) {
e.preventDefault();
// e.stopPropagation();
}
if (moveDiv?.parentNode) {
moveDiv.parentNode.removeChild(moveDiv);
moveDiv = undefined;
}
document.body.removeEventListener("mouseup", docMouseUp, true);
document.body.removeEventListener("mousemove", docMouseMove, true);
}
}
async function playMediaOverlaysAudio(
moTextAudioPair: MediaOverlayNode,
begin: number | undefined,
end: number | undefined) {
if (IS_DEV) {
debug("playMediaOverlaysAudio()");
}
ensureKillAutoNextTimeout();
_mediaOverlayActive = true;
_mediaOverlayTextAudioPair = moTextAudioPair;
_mediaOverlayTextId = undefined;
if (!moTextAudioPair.Audio && !moTextAudioPair.Video) {
if (IS_DEV) {
debug("playMediaOverlaysAudio - !moTextAudioPair.Audio => mediaOverlaysNext()");
}
mediaOverlaysNext();
return; // TODO TTS
}
moHighlight_(moTextAudioPair);
const publicationURL = win.READIUM2.publicationURL;
// if (publicationURL.startsWith(READIUM2_ELECTRON_HTTP_PROTOCOL + "://")) {
// publicationURL = convertCustomSchemeToHttpUrl(publicationURL);
// }
// const url = publicationURL + "/../" + moTextAudioPair.Audio;
const urlObjFull = new URL(moTextAudioPair.Audio || moTextAudioPair.Video, publicationURL);
const urlFull = urlObjFull.toString();
const urlObjNoQuery = new URL(urlFull);
urlObjNoQuery.hash = "";
urlObjNoQuery.search = "";
const urlNoQuery = urlObjNoQuery.toString();
const hasBegin = typeof begin !== "undefined";
const hasEnd = typeof end !== "undefined";
// _previousAudioBegin = _currentAudioBegin;
_previousAudioEnd = _currentAudioEnd;
_currentAudioBegin = undefined;
_currentAudioEnd = undefined;
if (!hasBegin && !hasEnd) {
if (urlObjFull.hash) {
const matches = urlObjFull.hash.match(/t=([0-9\.]+)(,([0-9\.]+))?/);
if (matches && matches.length >= 1) {
const b = matches[1];
try {
_currentAudioBegin = parseFloat(b);
} catch (err) {
debug(err);
}
if (matches.length >= 3) {
const e = matches[3];
try {
_currentAudioEnd = parseFloat(e);
} catch (err) {
debug(err);
}
}
}
}
} else {
// const mediaFragmentUrl = `${urlNoQuery}${`t=${hasBegin ? begin : ""}${hasEnd ? `,${end}` : ""}`}`;
_currentAudioBegin = begin;
_currentAudioEnd = end;
}
if (IS_DEV) {
debug(`${urlFull} => [${_currentAudioBegin}-${_currentAudioEnd}]`);
}
const playClip = async (initial: boolean) => {
if (!_currentAudioElement) {
return;
}
const timeToSeekTo = _currentAudioBegin ? _currentAudioBegin : 0;
if (initial || _currentAudioElement.paused) {
if ((initial && !timeToSeekTo) ||
_currentAudioElement.currentTime === timeToSeekTo) {
if (IS_DEV) {
debug("playMediaOverlaysAudio() - playClip() - _currentAudioElement.play()");
}
ensureOnTimeUpdate(false);
_currentAudioElement.playbackRate = _mediaOverlaysPlaybackRate;
await _currentAudioElement.play();
// mediaOverlaysStateSetMediaOverlaysStateEnum_.PLAYING);
} else {
if (IS_DEV) {
debug("playMediaOverlaysAudio() - playClip() - ontimeupdateSeeked");
}
const ontimeupdateSeeked = async (ev: Event) => {
const currentAudioElement = ev.currentTarget as HTMLAudioElement;
currentAudioElement.removeEventListener("timeupdate", ontimeupdateSeeked);
if (IS_DEV) {
debug("playMediaOverlaysAudio() - playClip() - ontimeupdateSeeked - .play()");
}
ensureOnTimeUpdate(false);
if (_currentAudioElement) {
_currentAudioElement.playbackRate = _mediaOverlaysPlaybackRate;
await _currentAudioElement.play();
}
// mediaOverlaysStateSet(MediaOverlaysStateEnum_.PLAYING);
};
_currentAudioElement.addEventListener("timeupdate", ontimeupdateSeeked);
_currentAudioElement.currentTime = timeToSeekTo;
}
} else {
const contiguous =
_previousAudioUrl === _currentAudioUrl &&
typeof _previousAudioEnd !== "undefined" &&
_previousAudioEnd > (timeToSeekTo - 0.02) &&
_previousAudioEnd <= timeToSeekTo &&
_currentAudioElement.currentTime >= (timeToSeekTo - 0.1);
// _currentAudioElement.currentTime <= (timeToSeekTo + 0.5)
ensureOnTimeUpdate(false);
if (contiguous) {
if (IS_DEV) {
debug("playMediaOverlaysAudio() - playClip() - ensureOnTimeUpdate");
}
} else {
if (IS_DEV) {
debug("playMediaOverlaysAudio() - playClip() - currentTime = timeToSeekTo");
}
_currentAudioElement.currentTime = timeToSeekTo;
}
}
};
_previousAudioUrl = _currentAudioUrl;
if (!_currentAudioUrl || urlNoQuery !== _currentAudioUrl) {
_currentAudioUrl = urlNoQuery;
if (IS_DEV) {
debug("playMediaOverlaysAudio() - RESET: " + _previousAudioUrl + " => " + _currentAudioUrl);
}
// _currentAudioElement = document.getElementById(AUDIO_MO_ID) as HTMLAudioElement;
ensureOnTimeUpdate(true);
if (_currentAudioElement) {
_currentAudioElement.pause();
_currentAudioElement.setAttribute("src", "");
if (_currentAudioElement.parentNode) {
_currentAudioElement.parentNode.removeChild(_currentAudioElement);
}
}
_currentAudioElement = document.createElement(moTextAudioPair.Video ? "video" : "audio"); // no controls => should be invisible
if (moTextAudioPair.Video) {
_currentAudioElement.setAttribute("style", "display: block; position: absolute; padding: 0; margin: 0; left: 10px; top: 10px; width: auto; height: auto; z-index: 9999; cursor: move; border: 2px solid black;");
// _currentAudioElement.setAttribute("controls", "true");
_currentAudioElement.setAttribute("disableremoteplayback", "true");
_currentAudioElement.setAttribute("controlsList", "nofullscreen nodownload noremoteplayback noplaybackrate");
// _currentAudioElement.setAttribute("disablePictureInPicture", "false");
ensureVideoFrameDraggable();
} else {
_currentAudioElement.setAttribute("style", "display: none");
}
_currentAudioElement.setAttribute("id", AUDIO_MO_ID);
// _currentAudioElement.setAttribute("loop", "loop");
// _currentAudioElement.setAttribute("autoplay", "autoplay");
_currentAudioElement.setAttribute("role", "media-overlays");
document.body.appendChild(_currentAudioElement);
_currentAudioElement.addEventListener("error", (ev) => {
debug("-1) error: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr((ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
if (_currentAudioElement && _currentAudioElement.error) {
// 1 === MEDIA_ERR_ABORTED
// 2 === MEDIA_ERR_NETWORK
// 3 === MEDIA_ERR_DECODE
// 4 === MEDIA_ERR_SRC_NOT_SUPPORTED
debug(_currentAudioElement.error.code);
debug(_currentAudioElement.error.message);
}
});
if (IS_DEV) {
_currentAudioElement.addEventListener("load", (ev) => {
debug("0) load: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("loadstart", (ev) => {
debug("1) loadstart: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("durationchange", (ev) => {
debug("2) durationchange: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("loadedmetadata", (ev) => {
debug("3) loadedmetadata: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("loadeddata", (ev) => {
debug("4) loadeddata: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("progress", (ev) => {
debug("5) progress: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("canplay", (ev) => {
debug("6) canplay: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("canplaythrough", (ev) => {
debug("7) canplaythrough: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("play", (ev) => {
debug("8) play: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("pause", (ev) => {
debug("9) pause: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("ended", (ev) => {
debug("10) ended: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("seeked", (ev) => {
debug("11) seeked: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
if (DEBUG_AUDIO) {
_currentAudioElement.addEventListener("timeupdate", (ev) => {
debug("12) timeupdate: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
}
_currentAudioElement.addEventListener("seeking", (ev) => {
debug("13) seeking: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("waiting", (ev) => {
debug("14) waiting: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("volumechange", (ev) => {
debug("15) volumechange: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("suspend", (ev) => {
debug("16) suspend: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("stalled", (ev) => {
debug("17) stalled: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("ratechange", (ev) => {
debug("18) ratechange: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("playing", (ev) => {
debug("19) playing: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("interruptend", (ev) => {
debug("20) interruptend: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("interruptbegin", (ev) => {
debug("21) interruptbegin: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("emptied", (ev) => {
debug("22) emptied: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
_currentAudioElement.addEventListener("abort", (ev) => {
debug("23) abort: " +
(_currentAudioUrl !== (ev.currentTarget as HTMLAudioElement).src ? (_currentAudioUrl + " -- ") : "")
+ (ev.currentTarget as HTMLAudioElement).src.substr(
(ev.currentTarget as HTMLAudioElement).src.lastIndexOf("/")));
});
}
const oncanplaythrough = async (ev: Event) => {
const currentAudioElement = ev.currentTarget as HTMLAudioElement;
currentAudioElement.removeEventListener("canplaythrough", oncanplaythrough);
debug("oncanplaythrough");
await playClip(true);
};
_currentAudioElement.addEventListener("canplaythrough", oncanplaythrough);
const onpause = async (_ev: Event) => {
debug("onpause");
if (_mediaOverlaysState !== MediaOverlaysStateEnum_.PAUSED && _mediaOverlaysState !== MediaOverlaysStateEnum_.STOPPED) {
mediaOverlaysStateSet(MediaOverlaysStateEnum_.PAUSED);
}
};
_currentAudioElement.addEventListener("pause", onpause);
const onplay = async (_ev: Event) => {
debug("onplay");
if (_mediaOverlaysState !== MediaOverlaysStateEnum_.PLAYING) {
mediaOverlaysStateSet(MediaOverlaysStateEnum_.PLAYING);
}
};
_currentAudioElement.addEventListener("play", onplay);
_currentAudioElement.playbackRate = _mediaOverlaysPlaybackRate;
_currentAudioElement.setAttribute("src", _currentAudioUrl);
} else {
if (IS_DEV) {
debug("playMediaOverlaysAudio() - playClip()");
}
await playClip(false);
}
}
// https://www.w3.org/TR/epub-33/#sec-behaviors-skip-escape
// https://www.w3.org/TR/epub-ssv-11/
const _skippables = [
"footnote",
"endnote",
"pagebreak",
//
"note",
"rearnote",
"sidebar",
"marginalia",
"annotation",
// "practice",
// "help",
];
function isSkippable(mo: MediaOverlayNode): boolean {
return mo.Role && mo.Role.findIndex((r) => {
return _skippables.includes(r);
}) >= 0;
}
// https://www.w3.org/TR/epub-33/#sec-escapability
// const _escapables = [
// "table",
// "table-row",
// "table-cell",
// "list",
// "list-item",
// "figure",
// //
// "footnote",
// "endnote",
// "note",
// "rearnote",
// "footnotes",
// "rearnotes",
// "sidebar",
// "bibliography",
// "toc",
// "loi",
// "appendix",
// "landmarks",
// "lot",
// "index",
// "colophon",
// "epigraph",
// "conclusion",
// "afterword",
// "warning",
// "epilogue",
// "foreword",
// "introduction",
// "prologue",
// "preface",
// "preamble",
// "notice",
// "errata",
// "copyright-page",
// "acknowledgments",
// "other-credits",
// "titlepage",
// "imprimatur",
// "contributors",
// "halftitlepage",
// "dedication",
// "help",
// "annotation",
// "marginalia",
// "practice",
// "bridgehead",
// "page-list",
// "glossary",
// ];
// function isEscapable(mo: MediaOverlayNode): boolean {
// return mo.Role && mo.Role.findIndex((r) => {
// return _escapables.includes(r);
// }) >= 0;
// }
function findNextTextAudioPair(
mo: MediaOverlayNode,
moToMatch: MediaOverlayNode,
previousMo: {prev: MediaOverlayNode | undefined},
escape: boolean):
MediaOverlayNode | undefined | null { // returns null when skipped
if (DEBUG_AUDIO) {
debug("findNextTextAudioPair()");
debug(JSON.stringify(moToMatch));
debug(JSON.stringify(previousMo.prev));
}
const isSkip = _mediaOverlaySkippabilityIsEnabled && isSkippable(mo);
if (isSkip) {
if (DEBUG_AUDIO) {
debug("findNextTextAudioPair() - isSkippable");
debug(JSON.stringify(mo));
}
return null;
}
if (!mo.Children || !mo.Children.length) { // leaf === text/audio pair (SMIL par)
if (DEBUG_AUDIO) {
debug("findNextTextAudioPair() - leaf text/audio pair");
debug(JSON.stringify(mo));
}
if (previousMo.prev === moToMatch
// && (!escape || !isEscapable(mo))
) {
if (DEBUG_AUDIO) {
debug("findNextTextAudioPair() - prevMo === moToMatch");
}
return mo;
}
if (!_mediaOverlaySkippabilityIsEnabled || !isSkippable(mo)) {
if (DEBUG_AUDIO) {
debug("findNextTextAudioPair() - set previous");
debug(JSON.stringify(mo));
}
previousMo.prev = mo;
}
return undefined;
}
for (const child of mo.Children) {
if (DEBUG_AUDIO) {
debug("findNextTextAudioPair() - child");
debug(JSON.stringify(child));
}
const match = findNextTextAudioPair(child, moToMatch, previousMo, escape);
if (match) {
if (DEBUG_AUDIO) {
debug("findNextTextAudioPair() - match");
debug(JSON.stringify(match));
}
return match;
}
}
return undefined;
}
function findPreviousTextAudioPair(
mo: MediaOverlayNode,
moToMatch: MediaOverlayNode,
previousMo: {prev: MediaOverlayNode | undefined}):
MediaOverlayNode | undefined | null { // returns null when skipped
if (DEBUG_AUDIO) {
debug("findPreviousTextAudioPair()");
debug(JSON.stringify(moToMatch));
debug(JSON.stringify(previousMo.prev));
}
const isSkip = _mediaOverlaySkippabilityIsEnabled && isSkippable(mo);
if (isSkip) {
if (DEBUG_AUDIO) {
debug("findPreviousTextAudioPair() - isSkippable");
debug(JSON.stringify(mo));
}
return null;
}
if (!mo.Children || !mo.Children.length) { // leaf === text/audio pair (SMIL par)
if (DEBUG_AUDIO) {
debug("findPreviousTextAudioPair() - leaf text/audio pair");
debug(JSON.stringify(mo));
}
if (previousMo.prev &&
mo === moToMatch
) {
if (DEBUG_AUDIO) {
debug("findPreviousTextAudioPair() - mo === moToMatch");
debug(JSON.stringify(previousMo.prev));
}
return previousMo.prev;
}
if (!_mediaOverlaySkippabilityIsEnabled || !isSkippable(mo)) {
if (DEBUG_AUDIO) {
debug("findPreviousTextAudioPair() - set previous");
debug(JSON.stringify(mo));
}
previousMo.prev = mo;
}
return undefined;
}
for (const child of mo.Children) {
if (DEBUG_AUDIO) {
debug("findPreviousTextAudioPair() - child");
debug(JSON.stringify(child));
}
const match = findPreviousTextAudioPair(child, moToMatch, previousMo);
if (match) {
if (DEBUG_AUDIO) {
debug("findPreviousTextAudioPair() - match");
debug(JSON.stringify(match));
}
return match;
}
}
return undefined;
}
function findDepthFirstTextAudioPair(
textHref: string,
mo: MediaOverlayNode,
textFragmentIDChain: Array<string> | undefined | null,
allowFallbackSeek: boolean):
MediaOverlayNode | undefined | null { // returns null when skipped
if (DEBUG_AUDIO) {
debug("findDepthFirstTextAudioPair()");
}
const isSkip = _mediaOverlaySkippabilityIsEnabled && isSkippable(mo);
let isTextUrlMatch: boolean | undefined;
let isFragmentIDMatch: boolean | undefined;
if (mo.Text) {
const hrefUrlObj = new URL("https://dummy.com/" + mo.Text);
if (hrefUrlObj.pathname.substr(1) === textHref) { // includes leading slash
isTextUrlMatch = true;
if (hrefUrlObj.hash && textFragmentIDChain) {