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hmh.html
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<!--
TODO:
* Detect if the tab is visible/active:
- Don't run the loop if the user can't see anything.
- Restart the loop and rerender the current state when the user comes back.
* Only run the update loop when we have something to do (playing or animating).
* Consider unifying the marker click handler.
* Consider manually blending the colors for the sub-pixel region of the completed marker. It looks like using opacity isn't perfect.
-->
<html>
<head>
<meta charset="UTF-8">
<!-- STREAMER STYLE -->
<style>
body {
background-color: #222;
font-family: sans-serif;
}
.titleRow {
background-color: #303030;
color: #8A877D;
}
.marker {
border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.marker:hover .content {
background-color: #222;
}
.marker:hover .fadedProgress .completed {
background-color: rgba(139, 61, 35, 0.7);
color: black;
}
.marker .content {
background-color: #161616;
color: #8A877D;
}
.marker.current .content {
color: #B57714;
}
.marker .completed {
background-color: #8B3D23;
color: black;
}
</style>
<!-- END STREAMER STYLE -->
<style>
body {
padding: 0;
margin: 0;
}
.episodeList {
margin: 0 0 0 10px;
color: rgba(38, 139, 210, 1);
text-decoration: none;
}
.episodeList:visited {
color: rgba(38, 139, 210, 1);
text-decoration: none;
}
.episodeList:hover {
text-decoration: underline;
}
.titleRow {
display: flex;
flex-direction: horizontal;
padding: 7px;
}
.title {
flex-grow: 1;
}
.middleContainer {
display: flex;
flex-direction: horizontal;
}
.markersContainer {
display: inline-block;
overflow-y: scroll;
overflow-x: hidden;
flex-shrink: 0;
}
.marker {
position: relative;
cursor: pointer;
}
.marker .content, .marker .completed {
width: 310px;
display: block;
padding: 5px;
font-size: 14px;
word-wrap: break-word;
box-sizing: border-box;
}
.marker .progress, .marker .fadedProgress {
position: absolute;
top: 0;
left: 0;
height: 100%;
width: 0px;
overflow: hidden;
}
.videoContainer {
flex-grow: 1;
flex-shrink: 1;
display: inline-block;
overflow: hidden;
}
</style>
</head>
<body>
<div class="playerContainer">
<div class="titleRow">
<span class="title"></span>
<span class="author"></span>
<a class="episodeList" href="index.html">All episodes</a>
</div>
<div class="middleContainer">
<div class="videoContainer">
<div id="player"></div>
</div>
<div class="markersContainer">
</div>
<div>
</div>
<script>
var domReady = false;
var youtubeAPIReady = false;
function onYouTubeIframeAPIReady() {
youtubeAPIReady = true;
initVideo();
}
var markers = null;
var currentMarker = null;
var currentMarkerIdx = null;
var player = null;
var playerReady = false;
var playing = false;
var speed = 1;
var currentTime = 0;
var lastFrameTime = 0;
var scrollTo = -1;
var scrollPosition = 0;
var looping = false;
var animating = true; // TODO(agartner): Actually set this to avoid looping when we don't need to.
var startTime = null;
function onPlayerReady(ev) {
updateSize();
// NOTE(agartner): We assume that we initialize the youtube player after we read the markers from the DOM.
markers[markers.length-1].endTime = player.getDuration();
playerReady = true;
if (startTime) {
player.seekTo(startTime, true);
currentTime = startTime;
}
player.setPlaybackQuality("hd1080");
start();
}
function onPlayerStateChange(ev) {
if (ev.data == YT.PlayerState.PLAYING) {
playing = true;
currentTime = player.getCurrentTime();
} else if (ev.data == YT.PlayerState.PAUSED || ev.data == YT.PlayerState.BUFFERING) {
playing = false;
currentTime = player.getCurrentTime();
setProgress(currentTime);
} else {
playing = false;
}
}
function onPlayerPlaybackRateChange(ev) {
speed = ev.data;
}
function initVideo() {
if (youtubeAPIReady && domReady) {
markers = [];
var markerEls = document.querySelectorAll(".playerContainer .marker");
for (var i = 0; i < markerEls.length; ++i) {
var marker = {
timestamp: parseInt(markerEls[i].getAttribute("data-timestamp")),
endTime: (i < markerEls.length - 1 ? parseInt(markerEls[i+1].getAttribute("data-timestamp")) : null),
el: markerEls[i],
fadedProgress: markerEls[i].querySelector(".fadedProgress"),
progress: markerEls[i].querySelector(".progress"),
hoverx: null
};
markers.push(marker);
markerEls[i].addEventListener("click", (function(marker) {
return function(ev) {
if (playerReady) {
var time = marker.timestamp;
if (ev.currentTarget.classList.contains("current") && marker.hoverx !== null) {
time += (marker.endTime - marker.timestamp) * marker.hoverx;
}
player.seekTo(time, true);
currentTime = time;
if (!playing) {
player.playVideo();
}
}
}
})(marker));
markerEls[i].addEventListener("mousemove", (function(marker) {
return function(ev) {
if (marker.el.classList.contains("current")) {
marker.hoverx = (ev.clientX - ev.currentTarget.offsetLeft) / ev.currentTarget.offsetWidth;
}
}
})(marker));
markerEls[i].addEventListener("mouseleave", (function(marker) {
return function(ev) {
marker.hoverx = null;
}
})(marker));
}
var playerContainer = document.querySelector(".playerContainer");
var playerEl = document.querySelector("#player");
var videoContainer = playerContainer.querySelector(".videoContainer");
var markersContainer = playerContainer.querySelector(".markersContainer");
markersContainer.style.height = videoContainer.offsetWidth / 16 * 9;
markersContainer.addEventListener("wheel", function(ev) {
scrollTo = -1;
});
document.addEventListener("keypress", function(ev) {
var targetTime = null;
switch (ev.key) {
case "n":
case "d":
case "s":
var targetMarkerIdx = Math.min((currentMarkerIdx === null ? 0 : currentMarkerIdx + 1), markers.length-1);
targetTime = markers[targetMarkerIdx].timestamp;
break;
case "p":
case "a":
case "w":
var targetMarkerIdx = Math.max(0, (currentMarkerIdx === null ? 0 : currentMarkerIdx - 1));
targetTime = markers[targetMarkerIdx].timestamp;
break;
}
if (playerReady && targetTime !== null) {
player.seekTo(targetTime);
currentTime = targetTime;
if (!playing) {
player.playVideo();
}
}
});
player = new YT.Player("player", {
videoId: playerEl.getAttribute("data-videoId"),
width: videoContainer.offsetWidth,
height: videoContainer.offsetWidth / 16 * 9,
events: {
"onReady": onPlayerReady,
"onStateChange": onPlayerStateChange,
"onPlaybackRateChange": onPlayerPlaybackRateChange
}
});
window.addEventListener("resize", function() {
updateSize();
});
}
}
function updateSize() {
var videoContainer = document.querySelector(".playerContainer .videoContainer");
var markersContainer = document.querySelector(".playerContainer .markersContainer");
player.setSize(videoContainer.offsetWidth, videoContainer.offsetWidth / 16 * 9);
markersContainer.style.height = videoContainer.offsetWidth / 16 * 9;
}
function setProgress(time) {
var newCurrentMarker = currentMarker;
var newCurrentMarkerIdx = null;
for (var i = 0; i < markers.length; ++i) {
var marker = markers[i];
if (marker.timestamp <= time && marker.endTime > time) {
var totalWidth = marker.el.offsetWidth;
var progress = ((time - marker.timestamp) / (marker.endTime - marker.timestamp));
if (marker.hoverx === null || marker.hoverx == progress) {
var pixelWidth = progress * totalWidth;
marker.fadedProgress.style.width = Math.ceil(pixelWidth) + "px";
var opacity = pixelWidth - Math.floor(pixelWidth);
marker.fadedProgress.style.opacity = opacity;
marker.progress.style.width = Math.floor(pixelWidth) + "px";
} else {
marker.fadedProgress.style.opacity = 1;
marker.progress.style.width = Math.floor(Math.min(marker.hoverx, progress) * totalWidth) + "px";
marker.fadedProgress.style.width = Math.floor(Math.max(marker.hoverx, progress) * totalWidth) + "px";
}
if (currentMarker != marker) {
marker.el.classList.add("current");
newCurrentMarker = marker;
newCurrentMarkerIdx = i;
}
}
}
if (currentMarker != newCurrentMarker) {
if (currentMarker) {
currentMarker.fadedProgress.style.width = "0px";
currentMarker.progress.style.width = "0px";
currentMarker.el.classList.remove("current");
}
currentMarker = newCurrentMarker;
currentMarkerIdx = newCurrentMarkerIdx;
if (currentMarker) {
scrollTo = currentMarker.el.offsetTop + currentMarker.el.offsetHeight/2.0;
scrollPosition = document.querySelector(".playerContainer .markersContainer").scrollTop;
}
}
}
function update() {
var now = performance.now();
var delta = (now - lastFrameTime) / 1000.0;
lastFrameTime = now;
if (playing) {
currentTime += delta * speed;
}
setProgress(currentTime);
if (scrollTo >= 0) {
var markersContainer = document.querySelector(".playerContainer .markersContainer");
var targetPosition = scrollTo - markersContainer.offsetHeight/2.0;
targetPosition = Math.max(0, Math.min(targetPosition, markersContainer.scrollHeight - markersContainer.offsetHeight));
scrollPosition += (targetPosition - scrollPosition) * 0.1;
if (Math.abs(scrollPosition - targetPosition) < 1.0) {
markersContainer.scrollTop = targetPosition;
scrollTo = -1;
} else {
markersContainer.scrollTop = scrollPosition;
}
}
if (playing || animating) {
requestAnimationFrame(update);
} else {
looping = false;
}
}
function start() {
if (!looping) {
looping = true;
lastFrameTime = performance.now();
update();
}
}
// Page generation stuff (to be removed once this is rendered by the server)
function generatePlayer(annotations) {
var playerContainer = document.querySelector(".playerContainer");
var playerEl = document.querySelector("#player");
var title = playerContainer.querySelector(".title");
var author = playerContainer.querySelector(".author");
var markersContainer = playerContainer.querySelector(".markersContainer");
author.textContent = "Annotations by: " + (annotations.author || "Probably Miblo");
title.textContent = annotations.title;
playerEl.setAttribute("data-videoId", annotations.videoId);
for (var i = 0; i < annotations.markers.length; ++i) {
var marker = annotations.markers[i];
var markerEl = document.createElement("DIV");
markerEl.classList.add("marker");
markerEl.setAttribute("data-timestamp", marker.totalTime);
var contentEl = document.createElement("DIV");
contentEl.classList.add("content");
contentEl.textContent = markerTime(marker.totalTime) + " " + marker.text;
markerEl.appendChild(contentEl);
var fadedProgressEl = document.createElement("DIV");
fadedProgressEl.classList.add("fadedProgress");
markerEl.appendChild(fadedProgressEl);
var progressEl = document.createElement("DIV");
progressEl.classList.add("progress");
markerEl.appendChild(progressEl);
var completedEl = contentEl.cloneNode(true);
completedEl.classList.add("completed");
completedEl.classList.remove("content");
fadedProgressEl.appendChild(completedEl);
progressEl.appendChild(completedEl.cloneNode(true));
markersContainer.appendChild(markerEl);
}
domReady = true;
initVideo();
}
function markerTime(totalTime) {
var markTime = "(";
var hours = Math.floor(totalTime / 60 / 60);
var minutes = Math.floor(totalTime / 60) % 60;
var seconds = totalTime % 60;
if (hours > 0) {
markTime += padTimeComponent(hours) + ":";
}
markTime += padTimeComponent(minutes) + ":" + padTimeComponent(seconds) + ")";
return markTime;
}
function padTimeComponent(component) {
return (component < 10 ? "0" + component : component);
}
var hash = location.hash;
var annotationsFileLocation = null;
if (hash && hash.length > 1) {
if (hash[0] == "#") {
hash = hash.slice(1);
}
var hashParts = hash.split("#");
var episodeName = hashParts[0];
if (episodeName.startsWith("day")) {
annotationsFileLocation = "https://raw.githubusercontent.com/HandmadeCompanion/HandmadeCompanion/master/src/documents/videos/code/" + hashParts[0] + ".html.md";
} else if (episodeName.startsWith("chat")) {
annotationsFileLocation = "https://raw.githubusercontent.com/HandmadeCompanion/HandmadeCompanion/master/src/documents/videos/chat/" + hashParts[0] + ".html.md";
} else {
annotationsFileLocation = "https://raw.githubusercontent.com/HandmadeCompanion/HandmadeCompanion/master/src/documents/videos/misc/" + hashParts[0] + ".html.md";
}
if (hashParts.length > 1) {
startTime = parseInt(hashParts[1], 10);
}
}
if (annotationsFileLocation) {
var annotations = {
markers: []
};
var xhr = new XMLHttpRequest();
xhr.addEventListener("load", function() {
var contents = xhr.response;
var lines = contents.split("\n");
var mode = "none";
for (var i = 0; i < lines.length; ++i) {
var line = lines[i];
if (line == "---") {
mode = "none";
} else if (line.startsWith("title:")) {
annotations.title = line.slice(7).replace(/"/g, "");
} else if (line.startsWith("videoId:")) {
annotations.videoId = line.slice(9).replace(/"/g, "");
} else if (line.startsWith("author:")) {
annotations.author = line.slice(8).replace(/"/g, ""); // Miblo, where's the author field?
} else if (line.startsWith("markers")) {
mode = "markers";
} else if (mode == "markers") {
var match = line.match(/"((\d+):)?(\d+):(\d+)": "(.+)"/);
var marker = {
totalTime: (match[2] ? parseInt(match[2], 10) : 0) * 60 * 60 + parseInt(match[3], 10) * 60 + parseInt(match[4], 10),
text: match[5].replace(/\\"/g, "\"")
}
annotations.markers.push(marker);
}
}
generatePlayer(annotations);
});
xhr.addEventListener("error", function() {
document.querySelector(".playerContainer .title").innerHTML = "Could not load annotations file. <a href='index.html'>Try a different episode</a>";
document.querySelector(".middleContainer").style.display = "none";
});
xhr.open("GET", annotationsFileLocation);
xhr.setRequestHeader("Content-Type", "text/plain");
xhr.send();
} else {
document.querySelector(".playerContainer .title").innerHTML = "<a href='index.html'>Choose an episode</a>";
document.querySelector(".middleContainer").style.display = "none";
}
</script>
<script type="text/javascript" src="https://www.youtube.com/iframe_api"></script>
</body>
</html>