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// ==UserScript== | |
// @name Audio Indicators | |
// @author adisib | |
// @namespace namespace_adisib | |
// @description Show audio indicators (music note) in tabs for Pale Moon browser. | |
// @include * | |
// @grant none | |
// ==/UserScript== | |
(function(){ | |
"use strict"; | |
// -------------------- | |
function addMediaCheckEvents(node, func) | |
{ | |
node.addEventListener("pause", func, true); | |
node.addEventListener("playing", func, true); | |
node.addEventListener("volumechange", func, true); | |
node.addEventListener("emptied", func, true); | |
} | |
// -------------------- | |
function isPlayingSound(node) | |
{ | |
if ( ( node ) | |
&& ( !node.paused ) | |
&& ( !node.ended ) | |
&& ( !node.muted && node.volume > 0 ) | |
) | |
{ | |
return true; | |
} | |
else | |
{ | |
return false; | |
} | |
} | |
// -------------------- | |
function checkPlaying() | |
{ | |
if (checkPlaying.lastPlayingElement === undefined) | |
{ | |
checkPlaying.lastPlayingElement = document.getElementsByTagName("audio")[0]; | |
} | |
let lpe = checkPlaying.lastPlayingElement; | |
if (isPlayingSound(lpe)) | |
{ | |
return true; | |
} | |
let sounds = document.getElementsByTagName("audio"); | |
for (let i=0; i < sounds.length; ++i) | |
{ | |
let sound = sounds[i]; | |
if (isPlayingSound(sound)) | |
{ | |
checkPlaying.lastPlayingElement = sound; | |
return true; | |
} | |
} | |
let vids = document.getElementsByTagName("video"); | |
for (let i=0; i < vids.length; ++i) | |
{ | |
let vid = vids[i]; | |
if (isPlayingSound(vid)) | |
{ | |
checkPlaying.lastPlayingElement = vid; | |
return true; | |
} | |
} | |
return false; | |
} | |
// -------------------- | |
function setAudioIndicator(playing) | |
{ | |
if (setAudioIndicator.wasPlaying === undefined) | |
{ | |
setAudioIndicator.wasPlaying = false; | |
} | |
if (setAudioIndicator.wasPlaying === playing) | |
{ | |
return; | |
} | |
const indicator = "\u266B "; | |
if (playing) | |
{ | |
document.title = indicator + document.title; | |
setAudioIndicator.wasPlaying = true; | |
} | |
else | |
{ | |
if (document.title.startsWith(indicator)) | |
{ | |
document.title = document.title.slice(indicator.length); | |
} | |
setAudioIndicator.wasPlaying = false; | |
} | |
} | |
// -------------------- | |
function updateIndicator() | |
{ | |
let playing = checkPlaying(); | |
setAudioIndicator(playing); | |
} | |
// -------------------- | |
function addedElementHandler(mutations) | |
{ | |
let sourcesChanged = false; | |
for (let j=0; j < mutations.length; ++j) | |
{ | |
let nodes = mutations[j].addedNodes; | |
for (let i=0; i < nodes.length; ++i) | |
{ | |
let node = nodes[i]; | |
if (node.tagName === "VIDEO" || node.tagName === "AUDIO") | |
{ | |
addMediaCheckEvents(node, updateIndicator); | |
sourcesChanged = true; | |
} | |
} | |
nodes = mutations[j].removedNodes; | |
for (let i=0; i<nodes.length; ++i) | |
{ | |
let nodeName = nodes[i].tagName; | |
if (nodeName === "VIDEO" || nodeName === "AUDIO") | |
{ | |
sourcesChanged = true; | |
break; | |
} | |
} | |
} | |
if (sourcesChanged) | |
{ | |
updateIndicator(); | |
} | |
} | |
// -------------------- | |
function setObservers() | |
{ | |
let soundElementsMutationObserver = new MutationObserver( addedElementHandler ); | |
let SEMOInitOps = { childList: true, subtree: true }; | |
soundElementsMutationObserver.observe(document.body, SEMOInitOps); | |
// Title changes can remove the indicator, so make sure to add it back | |
let titleMutationObserver = new MutationObserver( updateIndicator ); | |
let TMOInitOps = { characterData: true, subtree: true }; | |
titleMutationObserver.observe(document.head.getElementsByTagName("title")[0], TMOInitOps); | |
let sounds = document.getElementsByTagName("audio"); | |
let vids = document.getElementsByTagName("video"); | |
for (let i=0; i < sounds.length; ++i) | |
{ | |
addMediaCheckEvents(sounds[i], updateIndicator); | |
} | |
for (let i=0; i < vids.length; ++i) | |
{ | |
addMediaCheckEvents(vids[i], updateIndicator); | |
} | |
} | |
// -------------------- | |
setObservers(); | |
updateIndicator(); | |
})(); |
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