// Advance
|
|
var initPhotoSwipeFromDOM = function(gallerySelector) {
|
|
var parseThumbnailElements = function(el) {
|
var thumbElements = el.childNodes,
|
numNodes = thumbElements.length,
|
items = [],
|
el,
|
childElements,
|
thumbnailEl,
|
size,
|
item;
|
|
for(var i = 0; i < numNodes; i++) {
|
el = thumbElements[i];
|
|
// include only element nodes
|
if(el.nodeType !== 1) {
|
continue;
|
}
|
|
childElements = el.children;
|
|
size = el.getAttribute('data-size').split('x');
|
|
// create slide object
|
item = {
|
src: el.getAttribute('href'),
|
w: parseInt(size[0], 10),
|
h: parseInt(size[1], 10),
|
author: el.getAttribute('data-author')
|
};
|
|
item.el = el; // save link to element for getThumbBoundsFn
|
|
if(childElements.length > 0) {
|
item.msrc = childElements[0].getAttribute('src'); // thumbnail url
|
if(childElements.length > 1) {
|
item.title = childElements[1].innerHTML; // caption (contents of figure)
|
}
|
}
|
|
|
var mediumSrc = el.getAttribute('data-med');
|
if(mediumSrc) {
|
size = el.getAttribute('data-med-size').split('x');
|
// "medium-sized" image
|
item.m = {
|
src: mediumSrc,
|
w: parseInt(size[0], 10),
|
h: parseInt(size[1], 10)
|
};
|
}
|
// original image
|
item.o = {
|
src: item.src,
|
w: item.w,
|
h: item.h
|
};
|
|
items.push(item);
|
}
|
|
return items;
|
};
|
|
// find nearest parent element
|
var closest = function closest(el, fn) {
|
return el && ( fn(el) ? el : closest(el.parentNode, fn) );
|
};
|
|
var onThumbnailsClick = function(e) {
|
e = e || window.event;
|
e.preventDefault ? e.preventDefault() : e.returnValue = false;
|
|
var eTarget = e.target || e.srcElement;
|
console.log(e.srcElement);
|
var clickedListItem = closest(eTarget, function(el) {
|
return el.tagName === 'A';
|
});
|
|
if(!clickedListItem) {
|
return;
|
}
|
|
var clickedGallery = clickedListItem.parentNode;
|
|
var childNodes = clickedListItem.parentNode.childNodes,
|
numChildNodes = childNodes.length,
|
nodeIndex = 0,
|
index;
|
|
for (var i = 0; i < numChildNodes; i++) {
|
if(childNodes[i].nodeType !== 1) {
|
continue;
|
}
|
|
if(childNodes[i] === clickedListItem) {
|
index = nodeIndex;
|
break;
|
}
|
nodeIndex++;
|
}
|
|
if(index >= 0) {
|
openPhotoSwipe( index, clickedGallery );
|
}
|
return false;
|
};
|
|
var photoswipeParseHash = function() {
|
var hash = window.location.hash.substring(1),
|
params = {};
|
|
if(hash.length < 5) { // pid=1
|
return params;
|
}
|
|
var vars = hash.split('&');
|
for (var i = 0; i < vars.length; i++) {
|
if(!vars[i]) {
|
continue;
|
}
|
var pair = vars[i].split('=');
|
if(pair.length < 2) {
|
continue;
|
}
|
params[pair[0]] = pair[1];
|
}
|
|
if(params.gid) {
|
params.gid = parseInt(params.gid, 10);
|
}
|
|
return params;
|
};
|
|
var openPhotoSwipe = function(index, galleryElement, disableAnimation, fromURL) {
|
var pswpElement = document.querySelectorAll('.pswp')[0],
|
gallery,
|
options,
|
items;
|
|
items = parseThumbnailElements(galleryElement);
|
|
// define options (if needed)
|
options = {
|
|
galleryUID: galleryElement.getAttribute('data-pswp-uid'),
|
|
getThumbBoundsFn: function(index) {
|
// See Options->getThumbBoundsFn section of docs for more info
|
var thumbnail = items[index].el.children[0],
|
pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
|
rect = thumbnail.getBoundingClientRect();
|
|
return {x:rect.left, y:rect.top + pageYScroll, w:rect.width};
|
},
|
|
addCaptionHTMLFn: function(item, captionEl, isFake) {
|
if(!item.title) {
|
captionEl.children[0].innerText = '';
|
return false;
|
}
|
captionEl.children[0].innerHTML = item.title + '<br/><small>Photo: ' + item.author + '</small>';
|
return true;
|
},
|
|
};
|
|
|
if(fromURL) {
|
if(options.galleryPIDs) {
|
// parse real index when custom PIDs are used
|
// http://photoswipe.com/documentation/faq.html#custom-pid-in-url
|
for(var j = 0; j < items.length; j++) {
|
if(items[j].pid == index) {
|
options.index = j;
|
break;
|
}
|
}
|
} else {
|
options.index = parseInt(index, 10) - 1;
|
}
|
} else {
|
options.index = parseInt(index, 10);
|
}
|
|
// exit if index not found
|
if( isNaN(options.index) ) {
|
return;
|
}
|
|
|
|
var radios = document.getElementsByName('gallery-style');
|
for (var i = 0, length = radios.length; i < length; i++) {
|
if (radios[i].checked) {
|
if(radios[i].id == 'radio-all-controls') {
|
|
} else if(radios[i].id == 'radio-minimal-black') {
|
options.mainClass = 'pswp--minimal--dark';
|
options.barsSize = {top:0,bottom:0};
|
options.captionEl = false;
|
options.fullscreenEl = false;
|
options.shareEl = false;
|
options.bgOpacity = 0.85;
|
options.tapToClose = true;
|
options.tapToToggleControls = false;
|
}
|
break;
|
}
|
}
|
|
if(disableAnimation) {
|
options.showAnimationDuration = 0;
|
}
|
|
// Pass data to PhotoSwipe and initialize it
|
gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options);
|
|
// see: http://photoswipe.com/documentation/responsive-images.html
|
var realViewportWidth,
|
useLargeImages = false,
|
firstResize = true,
|
imageSrcWillChange;
|
|
gallery.listen('beforeResize', function() {
|
|
var dpiRatio = window.devicePixelRatio ? window.devicePixelRatio : 1;
|
dpiRatio = Math.min(dpiRatio, 2.5);
|
realViewportWidth = gallery.viewportSize.x * dpiRatio;
|
|
|
if(realViewportWidth >= 1200 || (!gallery.likelyTouchDevice && realViewportWidth > 800) || screen.width > 1200 ) {
|
if(!useLargeImages) {
|
useLargeImages = true;
|
imageSrcWillChange = true;
|
}
|
|
} else {
|
if(useLargeImages) {
|
useLargeImages = false;
|
imageSrcWillChange = true;
|
}
|
}
|
|
if(imageSrcWillChange && !firstResize) {
|
gallery.invalidateCurrItems();
|
}
|
|
if(firstResize) {
|
firstResize = false;
|
}
|
|
imageSrcWillChange = false;
|
|
});
|
|
gallery.listen('gettingData', function(index, item) {
|
if( useLargeImages ) {
|
item.src = item.o.src;
|
item.w = item.o.w;
|
item.h = item.o.h;
|
} else {
|
item.src = item.m.src;
|
item.w = item.m.w;
|
item.h = item.m.h;
|
}
|
});
|
|
gallery.init();
|
};
|
|
// select all gallery elements
|
var galleryElements = document.querySelectorAll( gallerySelector );
|
for(var i = 0, l = galleryElements.length; i < l; i++) {
|
galleryElements[i].setAttribute('data-pswp-uid', i+1);
|
galleryElements[i].onclick = onThumbnailsClick;
|
}
|
|
// Parse URL and open gallery if it contains #&pid=3&gid=1
|
var hashData = photoswipeParseHash();
|
if(hashData.pid && hashData.gid) {
|
openPhotoSwipe( hashData.pid, galleryElements[ hashData.gid - 1 ], true, true );
|
}
|
};
|
|
initPhotoSwipeFromDOM('.demo-gallery');
|
