HT-7 · August 12, 2023 18:44
diff --git a/timerUI.js b/timerUI.js
 // == Dependencies ==

 var mediaType; // for compatibility
 var playerExists = false; // is set to true below if player exists
 var checkMediaType_enabled = true; // for debugging purposes
 var media_element = {}; // declaring as object
 var tmp="",count=0; // initiating temporary variables used inside functions and loops

 function checkMediaType() {
 	// checks whether it is a video or an audio tag
 	if ( checkMediaType_enabled ) { 
 			var mediaTypeBeforeCheck = mediaType;
 			if (document.getElementsByTagName("video")[0]) {
 				playerExists = true; mediaType = "video";
 			}
 			if (document.getElementsByTagName("audio")[0]) {
 				playerExists = true; mediaType = "audio";
 			}
 			var mediaTypeAfterCheck = mediaType;
 			   if (mediaTypeBeforeCheck != mediaTypeAfterCheck)
 				  // Only show media type in console if it has changed.
 				  console.log("Detected media type: " + mediaType);
 		media_element = document.getElementsByTagName(mediaType)[0];
 		// Set back to false if no player is found after using customMediaElement.
 		media_element ? playerExists=true : playerExists=false;
 	}
 }

 function customMediaElement(custom_media_element) {
 	checkMediaType_enabled = false;
 	if (custom_media_element) {
 		playerExists = true;
 		media_element = custom_media_element;
 		console.log("customMediaElement: Custom media element set. Reset using checkMediaType_enabled=true.");
 	} else { console.error("customMediaElement: No such media element found."); }
 }
 var customTitleElement;

 function checkFileExtension(ext) {
 	if (typeof(ext) == "string") {
 		ext = ext.toLowerCase(); // case-insensitive
 		// string
 		if (document.location.href.search(new RegExp(ext+"$", "i")) > -1) return true; else return false;
 	} else if (typeof(ext) == "object") {
 		// array – check against multiple strings
 		for (var count=0; count < ext.length; count++) {
 			if (document.location.href.search(new RegExp(ext[count]+"$", "i")) > -1) return true;
 			if (count == ext.length-1) return false; // if no matches after going through them all
 		}
 	}
 }

 function isDomain(domain) { 
 	// Using .search() instead of .includes() to improve browser compatibility.
 	if (window.location.hostname.search(domain) >= 0) return true; else return false; 
 }

 // symbols
 var media_symbol = {};
 	media_symbol.play = "▶&#xFE0E;&thinsp;"; // thin space for alignment
 	media_symbol.pause="&#10074;&thinsp;&#10074;"; // instead of "⏸" due to Edge browser putting an immutable blue box around it.
 	media_symbol.stop="■";

 // mousedown status
 var mousedown_status;
 window.addEventListener("mousedown", function(){mousedown_status=true; } );
 window.addEventListener("mouseup", function(){mousedown_status=false; } );

 function appendChildWithID(tagName,tagID,parent_element) {
 	// default parent element to document.body if unspecified
 	if (parent_element === undefined) parent_element = document.body;
 	parent_element.appendChild(document.createElement(tagName)); // add div
 	parent_element.lastElementChild.id=tagID; // give it ID
 }

 function addStyle(new_style,parent_element) {
 	if (parent_element === undefined) parent_element = document.body;
 	parent_element.appendChild(document.createElement("style")); // add style
 	parent_element.lastElementChild.innerHTML = new_style;
 }

 // time variables
 var media_time = {};

 // HH:MM:SS timer
 function HMStimer_core(seconds) {

 		// hours
 		media_time.HH = Math.floor( seconds/3600 );
 		// leading zero
 		if ( seconds < 36000 ) media_time.HH = "0" + media_time.HH;

 		// minutes
 		media_time.MM = Math.floor( seconds/60%60 );
 		// leading zero
 		if ( seconds%3600 < 600 ) media_time.MM = "0" + media_time.MM;

 		// seconds
 		media_time.SS = Math.floor( seconds%60 );
 		// leading zero
 		if ( seconds%60 < 10 ) media_time.SS = "0" + media_time.SS;

 	return media_time.HH+":"+media_time.MM+":"+media_time.SS;
 }

 function HMStimer(seconds) {
 	if (seconds >= 0) return HMStimer_core(seconds); // zero or positive
 	if (seconds < 0) // negative
 		{ 
 		 seconds = seconds * (-1);
 		 return "-"+HMStimer_core(seconds);
 		}
 	if (seconds == undefined || isNaN(seconds) ) return "–&thinsp;–:–&thinsp;–:–&thinsp;–";

 }

 // MM:SS timer
 function MStimer_core(seconds) {

 		// minutes
 		media_time.MM = Math.floor( seconds/60 );
 		// leading zero
 		if ( seconds%3600 < 600 ) media_time.MM = "0" + media_time.MM;

 		// seconds
 		media_time.SS = Math.floor( seconds%60 );
 		// leading zero
 		if ( seconds%60 < 10 ) media_time.SS = "0" + media_time.SS;

 	return media_time.MM+":"+media_time.SS;
 }

 function MStimer(seconds) {
 	if (seconds >= 0) return MStimer_core(seconds); // zero or positive
 	if (seconds < 0) // negative
 		{ 
 		 seconds = seconds * (-1);
 		 return "-"+MStimer_core(seconds);
 		}
 	if (seconds == undefined || isNaN(seconds) ) return "–&thinsp;–:–&thinsp;–";

 }


 // implements togglePlay(); – deprecated due to compatibility issues on YouTube (broken site) and Dailymotion ("not a function" error through iframe'd player).
 /*
 Object.prototype.togglePlay = function togglePlay() {
  return this.paused ? this.play() : this.pause();
 };
 */

 // new function without object prototype for compatibility
 function togglePlay(media_element) {
 	if (media_element) { // validate media element first to avoid errors
 		media_element.paused ? media_element.play() : media_element.pause();
 	}
 }

 // media file extension list
 var mediafileext = {
 	"video":[".mp4", ".mpg", ".mpeg", ".mts", ".mt2s", ".m4v", ".ts", ".ogv", ".wmv", ".3gp", ".3gpp", ".webm"],
 	"audio":[".mp3", ".wma", ".wav", ".ogg", ".opus", ".flac", ".oga", ".wma", ".aac", ".amr", ".alac", ".m4a"]
 };

 // "replaceAll()" polyfill for pre-2020 browsers
 	// based on: https://stackoverflow.com/a/1144788 
 		
 function escapeRegExp(string) {
 	return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
 }

 	// renamed function to prevent interference with "replaceAll()" on browsers since 2020
 function replaceAll_polyfill(str, find, replacement) {
 	return str.replace(new RegExp(escapeRegExp(find), 'g'), replacement);
 }

 // == Main code ==
 if (! timerUI) var timerUI = new Object({}); // create parent object if none exists

 	// default system variables
 timerUI.debug_mode = false;
 timerUI.override_check = false;

 timerUI.on = true;
 timerUI.buffer_on = true;
 timerUI.multiBuffer = true; // multiple buffer segments
 timerUI.div = {}; // unset yet, declaring to prevent reference errors
 timerUI.interval = {};
 timerUI.show_remaining = 0; // 0: show elapsed time. 1: show remaining time. 2: show elapsed and total.
 timerUI.update_during_seek = true; // update timer while dragging seek bar
 timerUI.color = "rgb(49,136,255)"; // #38F – using RGB for compatibility.
 timerUI.default_color = "rgb(49,136,255)"; // memorize default color
 timerUI.gradient = "rgba(0,0,0,0.9)"; // using RGBA instead of hexadecimal for compatibility.
 timerUI.font_pack = "din, futura, 'noto sans', 'open sans', ubuntu, 'segoe ui', verdana, tahoma, roboto, 'roboto light', arial, helvetica, 'trebuchet ms' ,'bitstream vera sans', sans-serif, consolas, monospace";
 timerUI.width_breakpoint = 768; // pixels

 	// console notifications and warnings (possibly to be expanded)
 timerUI.msg = {
 	"notimer": "timerUI: No timer found; checking for media element again. Please try again.",
 	"nomedia": "timerUI: no media element found on page. Stopping."
 };

 	// text containers (no const for compatibility)
 var timer_linefeed = "<span class=timer_linefeed><br /></span>";
 var timer_slash = " <span class=timer_slash>/</span> ";

 	// functions
 timerUI.toggle = {};
 timerUI.toggle.main = function() {
 	// show and hide
 	if (timerUI.div) {
 		timerUI.update();
 		if (timerUI.on) {  
 			timerUI.div.style.display = "none";
 			console.log("timerUI off");
 		}
 		if (! timerUI.on ) {  
 			timerUI.div.style.display = "block";
 			console.log("timerUI on");
 		}
 		if (timerUI.on) { timerUI.on = false; return false; } else { timerUI.on = true; return false; }
 	} else {
 		console.warn(timerUI.msg.notimer);
 		timeUI();
 	}
 };

 timerUI.toggle.buffer = function() {
 	if (timerUI.div) {
 		timerUI.update(); timerUI.updateBufferBar(true);
 		if (timerUI.buffer_on) {  
 			timerUI.buffer_bar.style.display = "none";
 			console.log("timerUI buffer bar off");
 		}
 		if (! timerUI.buffer_on ) {  
 			timerUI.buffer_bar.style.display = "block";
 			console.log("timerUI buffer bar on");
 		}
 		if (timerUI.buffer_on) {
 			timerUI.buffer_on = false; return false;
 		} else {
 			timerUI.buffer_on = true; return true;
 		}
 	} else {
 		console.warn(timerUI.msg.notimer);
 		timeUI();
 	}
 };

 timerUI.toggle.title = function() {
 	if (timerUI.div) {
 		timerUI.update(); timerUI.updateBufferBar(true);
 		if (timerUI.title_on) {  
 			timerUI.title.style.display = "none";
 			console.log("timerUI title off");
 		}
 		if (! timerUI.title_on ) {  
 			timerUI.title.style.display = "block";
 			console.log("timerUI title on");
 		}
 		if (timerUI.title_on) {
 			timerUI.title_on = false; return false;
 		} else {
 			timerUI.title_on = true; return true;
 		}
 	} else {
 		console.warn(timerUI.msg.notimer);
 		timeUI();
 	}
 };

 timerUI.getTitle = function() { 
 	if (! timerUI.domainRules_checked) /* only check domain rules once */ {
 		timerUI.domainRules();
 		timerUI.domainRules_checked = true;
 	}
 	if (customTitleElement) timerUI.newTitle = customTitleElement.innerHTML;
 	else { // skipping this whole part if no custom title is specified
 		timerUI.newTitle = document.title;
 		// replace underscores with spaces
 		timerUI.newTitle = replaceAll_polyfill(timerUI.newTitle, "_"," ");
 		timerUI.titleDomainRules();
 	}
 	if (media_element) {
 		timerUI.updateFileIcon();
 		return timerUI.file_icon+"&nbsp;"+timerUI.newTitle;
 	} else {
 		return "TimerUI – designed for home cinemas";
 	}
 };

 timerUI.guessMediaType = function() { 
 	if (isDomain("youtube.com") || isDomain("dailymotion.com") ) return "video";
 	if (document.location.pathname.search(/^\/video\//) > -1) return "video";
    if (! media_element.videoWidth) return "audio"; // Detects files that only contain audio, even if they have a video file extension.
    if (media_element.videoWidth > 0) return "video";
 	if (checkFileExtension(mediafileext.video) ) return "video";
 	if (checkFileExtension(mediafileext.audio) ) return "audio";
 	return "unknown"; // if nothing detected
 };

 timerUI.updateFileIcon = function() {
 	timerUI.file_icon = timerUI.guessMediaType();
 	switch(timerUI.file_icon) {
 		case "video": timerUI.file_icon = "🎞️"; break;
 		case "audio": timerUI.file_icon = "♫"; break;
 		case "unknown": timerUI.file_icon = "📄"; break;
 	}
 };


 timerUI.adaptTitleWidth = function() {
 	if (media_element.duration > 3600 && timerUI.show_remaining == 2 && window.innerWidth > timerUI.width_breakpoint) 
 		timerUI.title.style.maxWidth = "calc(100% - 670px)";
 	else
 		timerUI.title.style.maxWidth = "calc(100% - 400px)";
 };

 window.addEventListener('resize', function() { 
 	if (window.innerWidth < timerUI.width_breakpoint) timerUI.title.removeAttribute("style");
 } );

 timerUI.update = function() {
 	if (media_element) {
 		timerUI.bar.style.width=media_element.currentTime / media_element.duration * 100 + "%";

 		// buffer bar update formerly located here; removed from the scope of this function

 		switch(timerUI.show_remaining) {
 			// 0: "HH:MM:SS"  1: "-HH:MM:SS"  2: "MM:SS / MM:SS" or "HH:MM:SS / HH:MM:SS"
 			case 0: timerUI.time.innerHTML=HMStimer(media_element.currentTime); break;
 			case 1: timerUI.time.innerHTML=HMStimer(media_element.currentTime-media_element.duration); break;
 			case 2: 
 				if (media_element.duration < 3600 || isNaN(media_element.duration) ) {
 				// show hours if duration exceeds one hour
 					timerUI.time.innerHTML=
 						MStimer(media_element.currentTime)
 						+ timer_linefeed
 						+ timer_slash
 						+ MStimer(media_element.duration);
 				} else {
 					timerUI.time.innerHTML=
 						HMStimer(media_element.currentTime)
 						+ timer_linefeed
 						+ timer_slash
 						+ HMStimer(media_element.duration);
 				}
 				break;
 		}

 		if (media_element.paused) {
 			timerUI.status.innerHTML=media_symbol.pause;
 		} else {
 			timerUI.status.innerHTML=media_symbol.play;
 		}
 	} else { timerUI.stop(); console.warn(timerUI.msg.nomedia); }
 };
 timerUI.updateTitle = function() {
 	if (timerUI.title) timerUI.title.innerHTML = timerUI.getTitle();
 	};

 // update title on URL change
 addEventListener('popstate', timerUI.updateTitle);

 // update title fallback
 timerUI.interval.updateTitle = setInterval(timerUI.updateTitle, 2000);


 // buffer bar
 timerUI.updateBufferBar = function(override_paused) {
 	if (media_element && timerUI.buffer_on && (!media_element.paused || override_paused) ) {
 	timerUI.multiBuffer ? timerUI.update_multi_buffer() : timerUI.single_segment_buffer();
  }
 };

 // single-segment buffer bar
 timerUI.single_segment_buffer = function() {
 	if (timerUI.buffer_bar.innerHTML!="") { timerUI.buffer_bar.style=""; timerUI.buffer_bar.innerHTML=""; } // reset after switching from multi-segment buffer bar
 	// find out first buffer segment after current playback position
 	media_element.buffered.length > 0 ? timerUI.buffer_segment=media_element.buffered.length-1 : timerUI.buffer_segment=0;
 	// media_element.buffered.length is zero until player is initialized
 	// prevent timerUI.buffer_segment from going negative, as it would cause a DOMException error
 	if  ( timerUI.buffer_segment > 0) {
 		while (media_element.buffered.end(timerUI.buffer_segment-1) > media_element.currentTime && timerUI.buffer_segment > 1 ) {
 			timerUI.update_single_buffer();
 			timerUI.buffer_segment-- ;
 		}
 	}
 };

 timerUI.update_single_buffer = function() {
 	if (media_element.buffered.length > 0) {
 	// prevent "DOMException: Index or size is negative or greater than the allowed amount"
 		timerUI.buffer_bar.style.width=media_element.buffered.end(timerUI.buffer_segment) / media_element.duration * 100 + "%";
 	} else { timerUI.buffer_bar.style.width="0%"; }
 };

 // multi-segment buffer bar – highlight all buffered parts
 timerUI.update_multi_buffer = function() {
 	if (timerUI.buffer_bar.style.length < 1) {
 		timerUI.buffer_bar.style.width="100%";
 		timerUI.buffer_bar.style.backgroundColor="rgba(0,0,0,0)";
 	}
 	if (media_element.buffered.length > 0) {
 		timerUI.generate_buffer_segments();
 	} else { timerUI.buffer_bar.style.width="0%"; }
 };

 timerUI.generate_buffer_segments = function() {
 	timerUI.buffer_bar.innerHTML=""; // reset to re-generate segments
 	for (count=0; count < media_element.buffered.length; count++) {
 		timerUI.append_buffer_segment(
 			timerUI.get_buffer_range(count).start_pos,
 			timerUI.get_buffer_range(count).end_pos
 		);
 	}
 	timerUI.select_segments = timerUI.buffer_bar.getElementsByClassName("timerUI_buffer_segment");
 	timerUI.segment_count = timerUI.select_segments.length;
 };

 timerUI.append_buffer_segment = function(start_pos,end_pos) {
 	timerUI.buffer_bar.appendChild(document.createElement("div") );
 	timerUI.buffer_bar.lastElementChild.classList.add("timerUI_buffer_segment");
 	timerUI.buffer_bar.lastElementChild.style="left:"+start_pos+"%;width:"+(end_pos-start_pos)+"%;background-color:"+timerUI.color+";";
 };

 timerUI.get_buffer_range = function(segment_number) {
 	return { 
 	start_pos: media_element.buffered.start(segment_number) / media_element.duration * 100,
 	end_pos: media_element.buffered.end(segment_number) / media_element.duration * 100 
 	}; // object with start and end percentages
 };

 timerUI.set_buffer_segment = function(segment_number,start_pos,end_pos) {
 	var selection=timerUI.buffer_bar.getElementsByClassName("timerUI_buffer_segment");
 	selection[segment_number].style.left = start_pos / media_element.duration * 100 + "%";
 	selection[segment_number].style.width = (end_pos-start_pos) / media_element.duration * 100 + "%";
 };



 // colors
 timerUI.setColor = function(newColor) {
 	if (! timerUI.bar) {
 		/* prevent running function before timerUI is properly loaded into the DOM to prevent exception */
 		if (timerUI.debug_mode) console.debug("timerUI: setColor can not run before timerUI is properly loaded.");
 		return false;
 	}
 	timerUI.previous_color = timerUI.color; // memorize previous setting
 	newColor == "default" ? timerUI.color="rgb(49,136,255)" /* #38F */ : timerUI.color = newColor;

 	timerUI.bar.style.backgroundColor=timerUI.color;
 	timerUI.buffer_bar.style.backgroundColor=timerUI.color;
 	timerUI.bar.style.boxShadow="0 0 30px 0 "+timerUI.color;
 	// (deprecated due to new buffer bar) timerUI.bar_placeholder.style.backgroundColor=timerUI.color;
 	timerUI.time.style.color=timerUI.color;
 	timerUI.status.style.color=timerUI.color;
 	timerUI.title.style.color=timerUI.color;

 	// colour all buffer segments
 	for (var count=0; count < timerUI.buffer_bar.childNodes.length; count++) {
 		timerUI.buffer_bar.childNodes[count].style.backgroundColor=timerUI.color;
 	}
 	if (timerUI.debug_mode) console.debug("timerUI: color changed from "+timerUI.previous_color+" to "+timerUI.color);
 };

 timerUI.setColor("default"); // prevent mixed colours if the code is run multiple times

 timerUI.setGradient = function(newGradient) {
 	newGradient == "default" ? timerUI.gradient="rgba(0,0,0,0.9)" : timerUI.gradient = newGradient;
 	timerUI.gradient_placeholder.style.backgroundImage="linear-gradient(to top,"+timerUI.gradient+", rgba(0,0,0,0) )";
 };

 timerUI.setFont = function(newFont) {
 	timerUI.time.style.fontFamily=newFont;
 	timerUI.title.style.fontFamily=newFont;
 };


 // light mode

 timerUI.light_mode = false; // default

 timerUI.light_mode_on = function() {
 	timerUI.light_mode = true;
 	timerUI.color_before_light_mode = timerUI.color;
 	// improves visibility:
 	if (timerUI.setColor) /* exists*/ {
 		timerUI.setColor("lightblue");
 	} else { return false; /* error */ }
 	if (timerUI.gradient_placeholder) /* exists*/ {
 		timerUI.gradient_placeholder.style.backgroundColor="rgba(0, 0, 0, 0.5)";
 	} else { return false; /* error */ }
 };

 timerUI.light_mode_off = function() {
 	timerUI.light_mode = false;
 	if (timerUI.setColor) /* exists*/ {
 		timerUI.setColor("lightblue");
 	} else { return false; /* error */ }
 	if (timerUI.gradient_placeholder) /* exists*/ {
 		timerUI.gradient_placeholder.style.backgroundColor=""; // fall back to default
 	} else { return false; /* error */ }
 };

 timerUI.toggle.light_mode = function() {
 	if ( ! timerUI.light_mode ) /* if light mode is deactivated */ {
 		timerUI.light_mode_on();
 		return true;
 	} else {
 		timerUI.light_mode_off();
 		return false;
 	}
 };

 // "stop" icon

 timerUI.stop = function() {
 	timerUI.status.innerHTML=media_symbol.stop;
 	timerUI.bar.style.width=0;
 	timerUI.buffer_bar.style.width=0;
 	// appearance of stopped timer consistent with the show_remaining setting
 	if (timerUI.show_remaining == 2) {
 		timerUI.time.innerHTML=MStimer(undefined)+" / "+MStimer(undefined);
 	} else {
 		timerUI.time.innerHTML=HMStimer(undefined);
 	}
 };

 // Additional checks to ensure the player is detected
 window.onclick = function() { checkMediaType();timeUI(); };
 window.addEventListener("keydown", function() { checkMediaType();timeUI(); } );


 function timeUI() {
 // slightly different name to prevent naming collision with timerUI object

 	checkMediaType();
 	// add timerUI if it does not already exist
 	if ( ( ! document.getElementById("timerUI") ) && playerExists || timerUI.override_check ) {

 	// Adding elements

 		// parent element
 		appendChildWithID("div","timerUI");
 		timerUI.div = document.getElementById("timerUI");

 		// button styling
 		addStyle("#timerUI button { background:none; border:none; outline:none; line-height:unset; padding:0; margin:0; }  #timerUI button:hover { filter: brightness(1.2); }    #timerUI button:active  { filter: brightness(0.6); }", timerUI.div);
 			// to suppress button background and border on earlier browser versions
 		timerUI.div.lastElementChild.classList.add("timerUI_buttons"); // label to improve visibility in page inspector

 		// background gradient
 		appendChildWithID("div","timerUI_bottom_gradient",timerUI.div );
 		timerUI.gradient_placeholder = document.getElementById("timerUI_bottom_gradient");
 		addStyle("#timerUI #timerUI_bottom_gradient { display:block; position:fixed; background-image:linear-gradient(to top,"+timerUI.gradient+", rgba(0,0,0,0) ); opacity:1; height:80pt; width:100%; left:0; bottom:0; pointer-events:none; }", timerUI.div);

 		// play/pause symbol
 		appendChildWithID("button","timerUI_playback_status",timerUI.div );
 		timerUI.status = document.getElementById("timerUI_playback_status");
 		timerUI.status.innerHTML="■";
 		addStyle("#timerUI #timerUI_playback_status { display:block; position:fixed; cursor:pointer; color:"+timerUI.color+"; font-size:24pt; line-height:40pt; bottom:30pt; right:3pt; font-family:none; }", timerUI.div);

 		// progress bar
 		appendChildWithID("div","timerUI_progress_bar",timerUI.div );
 		timerUI.bar = document.getElementById("timerUI_progress_bar");
 		addStyle("#timerUI #timerUI_progress_bar { display:block; position:fixed; background-color:"+timerUI.color+"; box-shadow: 0 0 30px 0px "+timerUI.color+"; height:8pt; width:50%; left:0; bottom:0; }", timerUI.div);

 		// buffer bar
 		appendChildWithID("div","timerUI_buffer_bar",timerUI.div );
 		timerUI.buffer_bar = document.getElementById("timerUI_buffer_bar");
 		addStyle("#timerUI #timerUI_buffer_bar, #timerUI .timerUI_buffer_segment { display:block; position:fixed; background-color:"+timerUI.color+"; height:8pt; width:75%; left:0; bottom:0; opacity:0.4; } #timerUI .timerUI_buffer_segment { opacity:1; }", timerUI.div);


 		// timer
 		appendChildWithID("button","timerUI_media_timer",timerUI.div );
 		timerUI.time = document.getElementById("timerUI_media_timer");
 		timerUI.time.innerHTML="00:00:00";
 		addStyle("#timerUI #timerUI_media_timer { display:block; color:"+timerUI.color+"; position:fixed; cursor:pointer; font-size:50pt; text-shadow: 0 0 20px black; line-height:60pt; bottom:10pt; right:30pt; text-align:right; font-weight:400; font-family:"+timerUI.font_pack+"; }  #timerUI #timerUI_media_timer .timer_linefeed { display:none; }", timerUI.div);



 		// progress bar placeholder – put last to be at the top in stacking context
 		appendChildWithID("div","timerUI_progress_placeholder",timerUI.div );
 		timerUI.bar_placeholder = document.getElementById("timerUI_progress_placeholder");
 		addStyle("#timerUI #timerUI_progress_placeholder { display:block; position:fixed; cursor:pointer; background-color:grey; height:8pt; width:100%; left:0; bottom:0; opacity:0.2; }", timerUI.div);

 		// responsive - at bottom to be able to override CSS properties without !important flag.
 		addStyle("@media (max-width:"+timerUI.width_breakpoint+"px) { #timerUI #timerUI_media_timer { font-size:30pt; line-height:24pt; bottom:15pt; } #timerUI #timerUI_playback_status { bottom:10pt; } } @media (max-width:500px) { #timerUI #timerUI_media_timer .timer_linefeed { display:inline; } #timerUI #timerUI_media_timer .timer_slash { display:none; } } @media (max-width:"+timerUI.width_breakpoint+"px) { #timerUI #timerUI_buffer_bar { font-size:10pt; -webkit-line-clamp: 3; max-width:60%;} } @media (max-width:480px) { #timerUI #timerUI_buffer_bar { display: none; } } ", timerUI.div);
 		timerUI.div.lastElementChild.classList.add("timerUI_responsive");

 		// media title
 		appendChildWithID("div","timerUI_media_title",timerUI.div );
 		timerUI.title = document.getElementById("timerUI_media_title");
 		timerUI.title.innerHTML = timerUI.getTitle();
 		addStyle("#timerUI #timerUI_media_title { position:fixed; text-shadow: 0 0 5px black; display:inline; display:-webkit-box; bottom:15pt; left:2pt; color:"+timerUI.color+"; font-family:"+timerUI.font_pack+"; font-size:20pt; width:60%; max-width:calc(100% - 500px); text-overflow: ellipsis;     overflow: hidden;   -webkit-box-orient: vertical; -webkit-line-clamp: 2; vertical-align: bottom;", timerUI.div);

 		timerUI.domainRules(); // load domain rules after initializing timer elements

 	// update timer during playback every fifteenth of a second and while mouse is dragging progress bar
 	timerUI.interval.update = setInterval(
 		function() { if ( 
 				( media_element /* exists? */ && timerUI.update_during_seek && mousedown_status )
 			 || ( media_element && timerUI.on && ! media_element.paused ) 
    ) timerUI.update(); }, 1000/15
 	);

 	// Longer interval for buffer bar to minimize CPU usage
 	timerUI.interval.buffer = setInterval(timerUI.updateBufferBar, 1000);


 	// play and pause toggle
 	timerUI.status.onclick = function() { togglePlay(media_element); timerUI.update(); timerUI.updateBufferBar(true); };
 		// former code with object prototype caused compatibility issues on various sites: media_element.togglePlay();

 	// toggle between elapsed, remaining, and elapsed/total time
 	timerUI.time.onclick = function() { 
 		switch(timerUI.show_remaining) {
 			case 0: timerUI.show_remaining = 1; break;
 			case 1: timerUI.show_remaining = 2; timerUI.adaptTitleWidth(); break;
 			case 2: timerUI.show_remaining = 0; timerUI.adaptTitleWidth(); break;
 		}
 		timerUI.update(); timerUI.updateBufferBar(true);
 	};

 	// clickable progress bar (experimental) - "clickPos" has no "timerUI." notation because it is inside the main function.
 	timerUI.clickSeekBar = function(m){
 		if (media_element) {
 			var clickPos = m.clientX / timerUI.bar_placeholder.offsetWidth;
 			// go to beginning if clicked in first percentile
 			if (clickPos < 0.01 ) media_element.currentTime = 0;
 				else media_element.currentTime = media_element.duration * clickPos;
 			timerUI.update(); timerUI.updateBufferBar(true);
 		}
 	};
 	/* 	function dragSeekBar(m){ // currently unused
 		m = m || window.event;
 		var clickPos = m.pageX / timerUI.bar_placeholder.offsetWidth;
 		var dragSeekBarInterval = setInterval( function() {
 			media_element.currentTime = media_element.duration * clickPos;
 			timerUI.update();
 			if (! mousedown_status) { clearInterval(dragSeekBarInterval); return; }
 		}, 200); 
 	} */
 	timerUI.bar_placeholder.addEventListener("mousedown", timerUI.clickSeekBar );
 	// (incomplete) timerUI.bar_placeholder.addEventListener("mousemove", dragSeekBar );
 	// (obsolete) timerUI.bar_placeholder.addEventListener("mouseup", clickSeekBar );

 	timerUI.update();

 	// == Patches ==

 		// prevent missing out on pausing from inside a site's existing player
 		window.addEventListener("mouseup", function() { setTimeout(timerUI.update, 200); } );
 		window.addEventListener("keyup", function() { setTimeout(timerUI.update, 200); } );

 		// prevent detaching from player on sites with playlists such as Internet Archive
 		timerUI.interval.checkMedia = setInterval( checkMediaType,1000 );

 		// prevent indicating "▶" after playback finished
 		timerUI.interval.checkPaused = setInterval( function() {
 				if ( media_element /* exists? */ && media_element.paused && ! timerUI.pause_checked) {
 					timerUI.update(); timerUI.pause_checked = true;
 					if (timerUI.debug_mode) console.debug("timerUI: checking paused status: "+media_element.paused);
 				} else if ( media_element && ! media_element.paused ) { timerUI.pause_checked = false; }
 				// to avoid redundant checks while paused
 		},1000 );

 	} else {
 	// warn in console that no player exists; prevent repetition
 		if (! playerExists && ! timerUI.noMediaWarned) {
 				console.warn(timerUI.msg.nomedia); timerUI.noMediaWarned = true;
 		}
 	}
 }

 // == Custom domain rules ==
 timerUI.domainRules = function() {
 	if (isDomain("dailymotion.com") && document.location.pathname.search(/^\/embed\//) < 0 ) {
 		// Dailymotion watch page, excluding embed page.
 		customMediaElement(
 			document.getElementById("player-body").contentWindow.document.getElementsByTagName("video")[0]
 		);
 		customTitleElement = document.getElementById("media-title"); // for unlisted videos (Dailymotion only displays the video title in the HTML page title for public videos)
 	}

 	// activate light mode on wikis and Dailymotion due to bright backgrounds
 	if ( isDomain("wiki") 
 		|| isDomain("dailymotion.com") 
 		|| isDomain("ghostarchive.org") 
 		|| is_archive_library() ) {
 		timerUI.light_mode_on();
 	}

 	// media embedded on Wayback Machine
 	if ( is_WaybackEmbed() ) {
 		tmp = document.getElementsByTagName("iframe")[0]; // iframe in temporary variable to deduplicate code
 		customMediaElement(
 			tmp.contentWindow.document.getElementsByTagName("video")[0]
 		);
 		// dark background for improved video visibility
 		tmp.contentWindow.document.body.style.backgroundColor="#222";
 		}
 };

 timerUI.titleDomainRules = function() {
 // custom domain rules for title
 	if ( isDomain("youtube.com") || isDomain("dailymotion.com")
 		|| isDomain("wikimedia.org") || isDomain("wikipedia.org")
 		|| isDomain("wikiversity.org") || isDomain("wikibooks.org")
 		|| isDomain("mediawiki.org")
 		) {
 		// negative lookahead regular expression – trim after last dash
 		// Match both normal dash "-" and ndash "–", since the German-language wikis use the latter.
 		timerUI.newTitle = decodeURI(timerUI.newTitle.substring(0,timerUI.newTitle.search(/(-|–)(?:.(?!(-|–)))+$/)-1 ) );
 	}
 	// remove "File:" prefix on wikis and 
 	if ( isDomain("wiki") ) {
 		if (document.title.search(/^File:/)  == 0 ) timerUI.newTitle = timerUI.newTitle.substring(5);
 		if (document.title.search(/^Datei:/) == 0 ) timerUI.newTitle = timerUI.newTitle.substring(6);
 	}

 	// Internet Archive library only, not Wayback Machine
 	if ( is_archive_library() ) {
 		// get media title from page title before first colon
 		timerUI.newTitle = (document.location.href+"").substring((document.location.href+" ").search(/\/(?:.(?!\/))+\/?$/)+1 );
 		// after last slash (additional space prevents full URL from being matched)
 		timerUI.archive_org_title = document.title.substring(0,document.title.search(/:(?:.(?!:))+(?:.(?!:))+/)-1 );
 		if (timerUI.archive_org_title.length > 0) /* only append " - " if a title exists. */ {
 			/* only append " - " if a title exists. */
 			if (timerUI.newTitle != "") { timerUI.newTitle += " - "; }
 			timerUI.newTitle += timerUI.archive_org_title;
 		}
 		// trim after second-last colon, -1 to remove space at end

 		timerUI.newTitle=decodeURI(timerUI.newTitle); // prevent spaces from turning into "%20".
 	}
 	if ( is_WaybackEmbed() ) {
 		// Already generated by the browser inside the iframe. How convenient. Otherwise, a regular expression that matches the part after the last slash in the URL, and a decodeURI would have to be used.
 		timerUI.newTitle = tmp.contentWindow.document.title;
 	}
 };

 function is_archive_library() { 
 	// function to check if the current page is an Archive.org library page and not the Wayback Machine
 	return (isDomain(/^(www.)?archive.org/) && ! isDomain("web.archive.org") );
 	// automatically returns true if the condition is met and false otherwise
 }
 function is_WaybackEmbed() {
 	// checks if the current page is media embedded on the Wayback Machine, for code deduplication.
 	if ( isDomain("web.archive.org") || isDomain("wayback.archive.org") && document.title=="Wayback Machine" && document.getElementsByTagName("iframe")[0] ) {
 		// separate check for ID of iframe to avoid reference error
 		if (document.getElementsByTagName("iframe")[0].id=="playback") {
 			return true; 
 		} 
 	} else {
 		return false;
 	}
 }


 // == Master function ==
 timeUI();