lainchan/js/expand-video.js
2015-08-11 03:59:18 +02:00

245 lines
8.8 KiB
JavaScript

/* This file is dedicated to the public domain; you may do as you wish with it. */
/* Note: This code expects the global variable configRoot to be set. */
if (typeof _ == 'undefined') {
var _ = function(a) { return a; };
}
function setupVideo(thumb, url) {
if (thumb.videoAlreadySetUp) return;
thumb.videoAlreadySetUp = true;
var video = null;
var videoContainer, videoHide;
var expanded = false;
var hovering = false;
var loop = true;
var loopControls = [document.createElement("span"), document.createElement("span")];
var fileInfo = thumb.parentNode.querySelector(".fileinfo");
var mouseDown = false;
function unexpand() {
if (expanded) {
expanded = false;
if (video.pause) video.pause();
videoContainer.style.display = "none";
thumb.style.display = "inline";
video.style.maxWidth = "inherit";
video.style.maxHeight = "inherit";
}
}
function unhover() {
if (hovering) {
hovering = false;
if (video.pause) video.pause();
videoContainer.style.display = "none";
video.style.maxWidth = "inherit";
video.style.maxHeight = "inherit";
}
}
// Create video element if does not exist yet
function getVideo() {
if (video == null) {
video = document.createElement("video");
video.src = url;
video.loop = loop;
video.innerText = _("Your browser does not support HTML5 video.");
videoHide = document.createElement("img");
videoHide.src = configRoot + "static/collapse.gif";
videoHide.alt = "[ - ]";
videoHide.title = "Collapse video";
videoHide.style.marginLeft = "-15px";
videoHide.style.cssFloat = "left";
videoHide.addEventListener("click", unexpand, false);
videoContainer = document.createElement("div");
videoContainer.style.paddingLeft = "15px";
videoContainer.style.display = "none";
videoContainer.appendChild(videoHide);
videoContainer.appendChild(video);
thumb.parentNode.insertBefore(videoContainer, thumb.nextSibling);
// Dragging to the left collapses the video
video.addEventListener("mousedown", function(e) {
if (e.button == 0) mouseDown = true;
}, false);
video.addEventListener("mouseup", function(e) {
if (e.button == 0) mouseDown = false;
}, false);
video.addEventListener("mouseenter", function(e) {
mouseDown = false;
}, false);
video.addEventListener("mouseout", function(e) {
if (mouseDown && e.clientX - video.getBoundingClientRect().left <= 0) {
unexpand();
}
mouseDown = false;
}, false);
}
}
// Clicking on thumbnail expands video
thumb.addEventListener("click", function(e) {
if (setting("videoexpand") && !e.shiftKey && !e.ctrlKey && !e.altKey && !e.metaKey) {
getVideo();
expanded = true;
hovering = false;
video.style.position = "static";
video.style.pointerEvents = "inherit";
video.style.display = "inline";
videoHide.style.display = "inline";
videoContainer.style.display = "block";
videoContainer.style.position = "static";
video.parentNode.parentNode.removeAttribute('style');
thumb.style.display = "none";
video.muted = (setting("videovolume") == 0);
video.volume = setting("videovolume");
video.controls = true;
if (video.readyState == 0) {
video.addEventListener("loadedmetadata", expand2, false);
} else {
setTimeout(expand2, 0);
}
video.play();
e.preventDefault();
}
}, false);
function expand2() {
video.style.maxWidth = "100%";
video.style.maxHeight = window.innerHeight + "px";
var bottom = video.getBoundingClientRect().bottom;
if (bottom > window.innerHeight) {
window.scrollBy(0, bottom - window.innerHeight);
}
// work around Firefox volume control bug
video.volume = Math.max(setting("videovolume") - 0.001, 0);
video.volume = setting("videovolume");
}
// Hovering over thumbnail displays video
thumb.addEventListener("mouseover", function(e) {
if (setting("videohover")) {
getVideo();
expanded = false;
hovering = true;
var docRight = document.documentElement.getBoundingClientRect().right;
var thumbRight = thumb.querySelector("img, video").getBoundingClientRect().right;
var maxWidth = docRight - thumbRight - 20;
if (maxWidth < 250) maxWidth = 250;
video.style.position = "fixed";
video.style.right = "0px";
video.style.top = "0px";
var docRight = document.documentElement.getBoundingClientRect().right;
var thumbRight = thumb.querySelector("img, video").getBoundingClientRect().right;
video.style.maxWidth = maxWidth + "px";
video.style.maxHeight = "100%";
video.style.pointerEvents = "none";
video.style.display = "inline";
videoHide.style.display = "none";
videoContainer.style.display = "inline";
videoContainer.style.position = "fixed";
video.muted = (setting("videovolume") == 0);
video.volume = setting("videovolume");
video.controls = false;
video.play();
}
}, false);
thumb.addEventListener("mouseout", unhover, false);
// Scroll wheel on thumbnail adjusts default volume
thumb.addEventListener("wheel", function(e) {
if (setting("videohover")) {
var volume = setting("videovolume");
if (e.deltaY > 0) volume -= 0.1;
if (e.deltaY < 0) volume += 0.1;
if (volume < 0) volume = 0;
if (volume > 1) volume = 1;
if (video != null) {
video.muted = (volume == 0);
video.volume = volume;
}
changeSetting("videovolume", volume);
e.preventDefault();
}
}, false);
// [play once] vs [loop] controls
function setupLoopControl(i) {
loopControls[i].addEventListener("click", function(e) {
loop = (i != 0);
thumb.href = thumb.href.replace(/([\?&])loop=\d+/, "$1loop=" + i);
if (video != null) {
video.loop = loop;
if (loop && video.currentTime >= video.duration) {
video.currentTime = 0;
}
}
loopControls[i].style.fontWeight = "bold";
loopControls[1-i].style.fontWeight = "inherit";
}, false);
}
loopControls[0].textContent = _("[play once]");
loopControls[1].textContent = _("[loop]");
loopControls[1].style.fontWeight = "bold";
for (var i = 0; i < 2; i++) {
setupLoopControl(i);
loopControls[i].style.whiteSpace = "nowrap";
fileInfo.appendChild(document.createTextNode(" "));
fileInfo.appendChild(loopControls[i]);
}
}
function setupVideosIn(element) {
var thumbs = element.querySelectorAll("a.file");
for (var i = 0; i < thumbs.length; i++) {
if (/\.webm$|\.mp4$/.test(thumbs[i].pathname)) {
setupVideo(thumbs[i], thumbs[i].href);
} else {
var m = thumbs[i].search.match(/\bv=([^&]*)/);
if (m != null) {
var url = decodeURIComponent(m[1]);
if (/\.webm$|\.mp4$/.test(url)) setupVideo(thumbs[i], url);
}
}
}
}
onready(function(){
// Insert menu from settings.js
if (typeof settingsMenu != "undefined" && typeof Options == "undefined")
document.body.insertBefore(settingsMenu, document.getElementsByTagName("hr")[0]);
// Setup Javascript events for videos in document now
setupVideosIn(document);
// Setup Javascript events for videos added by updater
if (window.MutationObserver) {
var observer = new MutationObserver(function(mutations) {
for (var i = 0; i < mutations.length; i++) {
var additions = mutations[i].addedNodes;
if (additions == null) continue;
for (var j = 0; j < additions.length; j++) {
var node = additions[j];
if (node.nodeType == 1) {
setupVideosIn(node);
}
}
}
});
observer.observe(document.body, {childList: true, subtree: true});
}
});