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gallery.html
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gallery.html
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<meta charset="UTF-8">
<html>
<!--
ThinGallery
===========
https://github.com/gfwilliams/ThinGallery
Copyright 2016 Gordon Williams, gw@pur3.co.uk (Licensed as MPLv2)
A single-file gallery webpage. This uses EXIF thumbnails, XMLHttpRequest Range headers,
and your web server's own index pages to quickly display thumbnails for a directory without
having to fully load every image file, and without needing ANY server-side scripting.
Usage
-----
* Put `gallery.html` in the folder that contains your photos.
* Don't rename it to `index.html` as the web server's own index.html is required in order to list the photos
* Open gallery.html with a web browser, and enjoy
-->
<head>
<title>Gallery</title>
<meta name="viewport" content="minimal-ui, width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<meta name="apple-mobile-web-app-title" content="Gallery">
<meta name="apple-mobile-web-app-capable" content="yes">
<link rel="apple-touch-icon" href="data:image/png;base64,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">
<script type="text/javascript" charset="utf-8">
// Mobile Safari in standalone mode
if(("standalone" in window.navigator) && window.navigator.standalone){
// If you want to prevent remote links in standalone web apps opening Mobile Safari, change 'remotes' to true
var noddy, remotes = true;
document.addEventListener('click', function(event) {
noddy = event.target;
// Bubble up until we hit link or top HTML element. Warning: BODY element is not compulsory so better to stop on HTML
while(noddy.nodeName !== "A" && noddy.nodeName !== "HTML") {
noddy = noddy.parentNode;
}
if('href' in noddy && noddy.href.indexOf('http') !== -1 && (noddy.href.indexOf(document.location.host) !== -1 || remotes)) {
event.preventDefault();
document.location.href = noddy.href;
}
},false);
}
</script>
<style>
:root {
--thumb-width: 240px;
--thumb-height: 240px;
}
body {
color: white;
background-color: black;
}
a > .thumb { color: #fff; }
.thumb {
position: relative;
display: inline-block;
width:var(--thumb-width); height:var(--thumb-height);
margin: 4px;
cursor: pointer;
overflow: hidden;
}
.caption {
text-align: center;
font-size: 80%;
font-family: Helvetica, Arial, Sans-Serif;
text-shadow: 1px 0 0 #000, 0 -1px 0 #000, 0 1px 0 #000, -1px 0 0 #000;
position: absolute;
width:var(--thumb-width);
bottom:0px;
}
.thumbicon {
position: absolute;
font-size:48px;
left:50%;
top:50%;
transform: translateX(-50%) translateY(-50%);
}
.thumbimage {
position:absolute;top:0px;left:0px;
width:var(--thumb-width); height:var(--thumb-height);
background-position: center;
background-repeat: no-repeat;
background-size: contain;
}
.fullscreen {
position: absolute;
width: 100%;
min-height: 100%;
left: 0;
top: 0;
}
#modal {
background-color: rgba(0,0,0,0.8);
}
#bigimage {
position: absolute;
width: 100%;
min-height: 100%;
left: 0;
top: 0;
background-position: center;
background-repeat: no-repeat;
background-size: contain;
}
#loadingimage {
position: absolute;
width: 100%;
min-height: 100%;
left: 0;
top: 0;
background-position: center;
background-repeat: no-repeat;
background-size: contain;
}
#left,#right,#maximise {
position:absolute;
font-size:96px;
font-weight: bold;
}
#left,#right {
top: 50%; transform: translateY(-50%);
}
#left { left:10px; cursor:pointer; }
#right { right:10px; cursor:pointer; }
#maximise { right:10px;bottom:10px; cursor:pointer; }
#left,#right,#maximise {
text-shadow: 4px 0 0 #000, 0 -4px 0 #000, 0 4px 0 #000, -4px 0 0 #000, -3px -3px 0 #000, 3px -3px 0 #000, 3px 3px 0 #000, -3px -3px 0 #000;;
}
</style>
</head>
<body>
<div id="thumbs"></div>
<script>
var THUMB_SIZE = 240; // size when we have to load the full image and resize it
var MAX_CONCURRENT_REQ = 2;
var EXT_EXIF_THUMB = [".jpg",".jpeg" ]; // these have EXIF thumbnails
var EXT_IMAGES = [".jpg",".jpeg",".png",".webp",".svg",".svgz" ];
var EXT_VIDEO = [".avi",".mov",".mpeg",".mpg",".mp4",".ogv"];
var EXT_AUDIO = [".mp3",".wav",".ogg"];
var EXT_TEXT = [".txt",".md"];
var requestsInProgress = 0;
var requestsQueued = [];
var baseURL = "";
var imageURLs = [];
var imageInfo = {};
var showingImage; // currently loading/showing image
var imageLoader, nextImageLoader, prevImageLoader;
// Get a thumbnail from EXIF data
function getThumbFromFullImage(url, callback) {
var img = document.createElement('img');
img.onload = function () {
var oc = document.createElement('canvas'),
octx = oc.getContext('2d');
if (img.width > img.height) {
oc.width = THUMB_SIZE;
oc.height = THUMB_SIZE * img.height / img.width;
} else {
oc.width = THUMB_SIZE * img.width / img.height;
oc.height = THUMB_SIZE;
}
octx.drawImage(img, 0, 0, oc.width, oc.height);
callback(oc.toDataURL());
};
img.src = url;
}
// Get a thumbnail from EXIF data
function getEXIFThumb(url, arraybuffer, callback) {
var arr = new Uint8Array(arraybuffer);
if (arr[0]!=0xFF || arr[1]!=0xD8) {
console.warn(url+" is not a valid JPEG");
return callback(url);
}
var offs = 2;
if (arr[offs]==0xFF && arr[offs+1]==0xE0) {
offs += arr[offs+3] + 2;
}
if (arr[offs]!=0xFF || arr[offs+1]!=0xE1) {
console.warn(url+" doesn't have EXIF tag at "+offs);
return callback(url);
}
var len = (arr[offs+2]<<8)|arr[offs+3];
if (len > arr.length) console.log("EXIF is "+len+" bytes long but we have only "+arr.length);
if (arr[offs+4]!=0x45 || arr[offs+5]!=0x78 || arr[offs+6]!=0x69 || arr[offs+7]!=0x66) {
console.warn(url+" doesn't have 'Exif' marker at "+offs);
return callback(url);
}
// Move on to TIFF header
offs += 10;
var rd16, rd32;
if (arr[offs]==0x49 && arr[offs+1]==0x49) {
// Intel align
rd16 = function(a) { return arr[a] | (arr[a+1]<<8); }
rd32 = function(a) { return arr[a] | (arr[a+1]<<8) | (arr[a+2]<<16) | (arr[a+3]<<24); }
} else if (arr[offs]==0x4D && arr[offs+1]==0x4D) {
// Motorola align
rd16 = function(a) { return arr[a+1] | (arr[a]<<8); }
rd32 = function(a) { return arr[a+3] | (arr[a+2]<<8) | (arr[a+1]<<16) | (arr[a]<<24); }
} else {
console.warn(url+" unknown byte alignment "+arr[offs]+","+arr[offs+1]);
return callback(url);
}
if (rd16(offs+2) != 0x002A) {
console.warn(url+" expecting TAG mark");
return callback(url);
}
// move on to IFD - Image file directory
offs+=rd32(offs+4);
// get tags
var tags = rd16(offs);
if (tags>100) {
console.warn(url+" too many EXIF tags!");
return callback(url);
}
offs += 2;
// iterate over tags
var thumbOrientation;
for (var i=0;i<tags;i++) {
var tag = rd16(offs+i*12);
//console.log(tag.toString(16));
if (tag==0x0112) { // JPEG orientation
thumbOrientation = rd32(offs+i*12+8);
}
}
// skip to next IFD
offs = rd32(offs + tags*12);
if (offs==0) {
console.warn(url+" no second IFD.");
return callback(url);
}
offs += 12;
var tags = rd16(offs);
if (tags>300) {
console.warn(url+" too many EXIF tags ("+tags+") in second IFD!");
return callback(url);
}
offs += 2;
// iterate over tags
var thumbOffset, thumbLen;
for (var i=0;i<tags;i++) {
var tag = rd16(offs+i*12);
//console.log(tag.toString(16));
if (tag==0x0201) thumbOffset = rd32(offs + i*12 + 8)+12; // ?
if (tag==0x0202) thumbLen = rd32(offs + i*12 + 8);
}
if (thumbOffset && thumbLen) {
//console.log("Thumb at",thumbOffset,"size",thumbLen,"tag",arr[thumbOffset].toString(16),arr[thumbOffset+1].toString(16));
var data = arr.subarray(thumbOffset, thumbOffset+thumbLen);
var blob = new Blob( [ data ], { type: "image/jpeg" } );
var urlCreator = window.URL || window.webkitURL;
var imageURL = urlCreator.createObjectURL( blob );
var rotation = 0;
if (thumbOrientation==6) rotation = 90;
callback(imageURL, rotation);
} else {
/* No thumbnail */
callback(url);
}
}
// Given a JPEG image, download the header and try and find a thumbnail
function getImageThumbnail(url, finishedCb, thumbCb) {
//console.log("Loading "+url);
var xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.responseType = "arraybuffer";
xhr.setRequestHeader('Range', 'bytes=0-60000');
xhr.onload = function (oEvent) {
getEXIFThumb(url, xhr.response, function(url, rotation) {
thumbCb(url, rotation);
finishedCb();
});
};
xhr.send(null);
}
// Load image thumbnails using a queue (don't don them all at once)
function getImageThumbnailThrottled(url, cb, passURL) {
if (requestsInProgress < MAX_CONCURRENT_REQ) {
requestsInProgress++;
function finishedCb() {
requestsInProgress--;
if (requestsQueued.length) {
var r = requestsQueued.shift();
getImageThumbnailThrottled(r.url, r.cb, r.passURL);
}
}
if (passURL) {
getThumbFromFullImage(url, function(url) {
cb(url);
finishedCb();
});
} else {
getImageThumbnail(url, finishedCb, cb);
}
} else {
//console.log("Delayed "+url);
requestsQueued.push({url:url,cb:cb,passURL:passURL});
}
}
// Make a displayable name from the URL
function getNiceName(href) {
var niceName = href;
// remove trailing slashes
while (niceName[niceName.length-1]=="/")
niceName = niceName.substr(0,niceName.length-1);
// if there's a slash mid-way, delete what was before
if (niceName.lastIndexOf("/")>=0)
niceName = niceName.substr(niceName.lastIndexOf("/")+1);
return niceName;
}
// create a thumbnail and add it to the DOM, but don't set any contents
function addClickableThumb(thumbs, href) {
var im = document.createElement("DIV");
im.className = "thumb";
im.onclick = function(e) {
e.preventDefault();
console.log("Clicked "+href);
if (e.ctrlKey) {
window.open(href, '_blank');
} else {
document.getElementById("modal").setAttribute("style","display:block;top:"+window.scrollY+"px");
loadImage(href);
}
};
im = thumbs.appendChild(im);
return im;
}
// Add a thumbnail with a 'wait' indicator that fills in when ready
function addDeferredThumb(thumbs, href) {
var niceName = getNiceName(href);
function thumbLoaded(url, rotate) {
imageInfo[href].thumb = url;
imageInfo[href].rotation = rotate;
im.innerHTML =
'<div class="thumbimage" style="background-image:url('+url+');transform:rotate('+rotate+'deg)"></div>'+
'<div class="caption">'+decodeURIComponent(niceName)+'</div>';
}
var im = addClickableThumb(thumbs, href);
im.innerHTML = '<div class="caption">'+decodeURIComponent(niceName)+'</div><div class="thumbicon">⌛</div>';
getImageThumbnailThrottled(href, function(url,rotate) {
if (url == href) {
// We use getImageThumbnailThrottled so we can make sure
// that full images get loaded AFTER all the thumbnails
getImageThumbnailThrottled(url, thumbLoaded, true);
} else {
thumbLoaded(url, rotate);
}
});
}
// Add an image thumbnail - just shows the image directly inside it (for non-JPEGs that don't have a thumbnail)
function addImageThumb(thumbs, href) {
var niceName = getNiceName(href);
var im = addClickableThumb(thumbs, href);
im.innerHTML =
'<div class="thumbimage" style="background-image:url('+href+');transform:rotate(0)"></div>'+
'<div class="caption">'+decodeURIComponent(niceName)+'</div>';
}
// Add a simple thumbnail where a click opens a new window
function addBasicThumb(thumbs, href, iconText) {
var niceName = getNiceName(href);
var im = document.createElement("DIV");
im.innerHTML = '<div class="caption">'+decodeURIComponent(niceName)+'</div><div class="thumbicon">'+iconText+'</div>';
im.className = "thumb";
im.setAttribute("href", href);
im.onclick = function(e) {
e.preventDefault();
console.log("Clicked "+href);
window.open(href, '_blank');
};
im = thumbs.appendChild(im);
}
// Add thumbnail for a folder
function addFolder(thumbs, href) {
var niceName = getNiceName(href);
if (href.length < baseURL.length) niceName = "[BACK]";
var a = document.createElement("A");
a.href = window.location.pathname+"?"+href;
a.innerHTML = '<div class="thumb folder"><div class="caption">'+decodeURIComponent(niceName)+'</div><div class="thumbicon">📁</div></div>';
thumbs.appendChild(a);
}
// Scan the index page and add thumbnails for everything
function processIndexPage() {
//console.log(this.responseXML.title);
var thumbs = document.getElementById("thumbs");
var elements = this.responseXML.getElementsByTagName("a");
var handled = [];
for (var i=0;i<elements.length;i++) {
var href = elements[i].href;
var text = elements[i].innerText;
var parentText = elements[i].parentElement.innerText;
var re = new RegExp(text + '\/', "g");
if (handled.indexOf(href)>=0) continue;
if ((href[href.length-1]=="/" || parentText.match(re) )&& href!==baseURL) {
handled.push(href);
addFolder(thumbs, href);
}
}
for (var i=0;i<elements.length;i++) {
var href = elements[i].href;
var hrefl = href.toLowerCase();
var ext = hrefl.match(/\.[^\.]*$/);
if (!ext) continue;
ext=ext[0];
if (EXT_EXIF_THUMB.indexOf(ext)>=0) { // if it's jpeg/jpg and we can get a thumbnail
if (handled.indexOf(href)>=0) continue;
handled.push(href);
imageURLs.push(href);
imageInfo[href] = { thumb : "", rotation : 0 };
addDeferredThumb(thumbs, href);
} else if (EXT_IMAGES.indexOf(ext)>=0) { // else just put the image in as a thumbnail
imageURLs.push(href);
imageInfo[href] = { thumb : href, rotation : 0 };
addImageThumb(thumbs, href);
} else if (EXT_VIDEO.indexOf(ext)>=0) {
addBasicThumb(thumbs, href, "🎥");
} else if (EXT_AUDIO.indexOf(ext)>=0) {
addBasicThumb(thumbs, href, "🔊");
} else if (EXT_TEXT.indexOf(ext)>=0) {
addBasicThumb(thumbs, href, "🗎");
} else console.log("Unknown file type "+href+", ignoring.");
}
document.getElementById("left").setAttribute("style","visibility:inherit");
document.getElementById("right").setAttribute("style","visibility:inherit");
document.getElementById("maximise").setAttribute("style","visibility:inherit");
document.getElementById("modal").setAttribute("style","visibility:hidden");
}
// Load the index page from the web server and display thumbnails
function loadAllImages(url) {
var xhr = new XMLHttpRequest();
xhr.onload = processIndexPage;
baseURL = url;
xhr.open("GET", baseURL);
xhr.responseType = "document";
xhr.send();
}
// Load a full-size image and also try and load next/prev for faster navigation
function loadImage(url) {
var transform = imageInfo[url].rotation ? ';transform:rotate('+imageInfo[url].rotation+'deg)' : "";
document.getElementById("bigimage").setAttribute("style","background-image:url("+imageInfo[url].thumb+")"+transform);
imageLoader.onload = function() {
console.log("Full image loaded. Loading next and prev.");
var i = imageURLs.indexOf(showingImage);
if (i>=0) {
if (i>0) prevImageLoader.src = imageURLs[i-1]+"?rand";
if (i<imageURLs.length-1) nextImageLoader.src = imageURLs[i+1]+"?rand";
}
};
imageLoader.src = url+"?rand";
document.getElementById("loadingimage").setAttribute("style","background-image:url("+url.replace(/\(/g, "\\(").replace(/\)/g, "\\)")+"?rand)"+transform);
showingImage = url;
}
function onModalClicked(e) {
e.preventDefault();
if (e.target.id=="left" || e.target.id=="right" || e.target.id=="maximise") return;
document.getElementById("modal").setAttribute("style","visibility:hidden");
document.getElementById("bigimage").setAttribute("style","");
document.getElementById("loadingimage").setAttribute("style","");
showingImage = null;
}
function onChangeModal(e, dir) {
e.preventDefault();
var i = imageURLs.indexOf(showingImage);
if (i<0) i=0;
i += dir;
if (i<0) i+= imageURLs.length;
if (i>=imageURLs.length) i-= imageURLs.length;
loadImage(imageURLs[i]);
}
function onMaximiseClicked(e) {
e.preventDefault();
if (!showingImage) return;
window.open(showingImage, '_blank').focus();
}
window.onscroll = onModalClicked;
window.onload = function() {
imageLoader = document.createElement("IMG");
nextImageLoader = document.createElement("IMG");
prevImageLoader = document.createElement("IMG");
document.getElementById("modal").onclick = onModalClicked;
document.getElementById("left").onclick = function(e) { onChangeModal(e,-1); };
document.getElementById("right").onclick = function(e) { onChangeModal(e,+1); };
document.getElementById("maximise").onclick = onMaximiseClicked;
document.addEventListener("keydown", function (e) {
if (e.keyCode==37) onChangeModal(e,-1);
if (e.keyCode==39) onChangeModal(e,1);
});
if (window.location.search.length>1)
loadAllImages(window.location.search.substr(1));
else
loadAllImages(".");
};
</script>
<div id="modal" class="fullscreen">
<div id="bigimage" style="visibility:hidden"></div>
<div id="loadingimage" style="visibility:hidden"></div>
<div id="left" style="visibility:hidden">◀</div>
<div id="right" style="visibility:hidden">▶</div>
<div id="maximise" style="visibility:hidden">➘</div>
</div>
</body>
</html>