beautifulSA-jekyll/js/main.js
2016-03-18 04:33:17 -07:00

111 lines
3.3 KiB
JavaScript

// Dean Attali / Beautiful Jekyll 2016
var main = {
bigImgEl : null,
numImgs : null,
init : function() {
// Shorten the navbar after scrolling a little bit down
$(window).scroll(function() {
if ($(".navbar").offset().top > 50) {
$(".navbar").addClass("top-nav-short");
} else {
$(".navbar").removeClass("top-nav-short");
}
});
// On mobile, hide the avatar when expanding the navbar menu
$('#main-navbar').on('show.bs.collapse', function () {
$(".navbar").addClass("top-nav-expanded");
});
$('#main-navbar').on('hidden.bs.collapse', function () {
$(".navbar").removeClass("top-nav-expanded");
});
// On mobile, when clicking on a multi-level navbar menu, show the child links
$('#main-navbar').on("click", ".navlinks-parent", function(e) {
var target = e.target;
$.each($(".navlinks-parent"), function(key, value) {
if (value == target) {
$(value).parent().toggleClass("show-children");
} else {
$(value).parent().removeClass("show-children");
}
});
});
// show the big header image
main.initImgs();
},
initImgs : function() {
// If the page was large images to randomly select from, choose an image
if ($("#header-big-imgs").length > 0) {
main.bigImgEl = $("#header-big-imgs");
main.numImgs = main.bigImgEl.attr("data-num-img");
// 2fc73a3a967e97599c9763d05e564189
// set an initial image
var imgInfo = main.getImgInfo();
var src = imgInfo.src;
var desc = imgInfo.desc;
main.setImg(src, desc);
// For better UX, prefetch the next image so that it will already be loaded when we want to show it
var getNextImg = function() {
var imgInfo = main.getImgInfo();
var src = imgInfo.src;
var desc = imgInfo.desc;
var prefetchImg = new Image();
prefetchImg.src = src;
// if I want to do something once the image is ready: `prefetchImg.onload = function(){}`
setTimeout(function(){
var img = $("<div></div>").addClass("big-img-transition").css("background-image", 'url(' + src + ')');
$(".intro-header.big-img").prepend(img);
setTimeout(function(){ img.css("opacity", "1"); }, 50);
// after the animation of fading in the new image is done, prefetch the next one
//img.one("transitioned webkitTransitionEnd oTransitionEnd MSTransitionEnd", function(){
setTimeout(function() {
main.setImg(src, desc);
img.remove();
getNextImg();
}, 1000);
//});
}, 6000);
};
// If there are multiple images, cycle through them
if (main.numImgs > 1) {
getNextImg();
}
}
},
getImgInfo : function() {
var randNum = Math.floor((Math.random() * main.numImgs) + 1);
var src = main.bigImgEl.attr("data-img-src-" + randNum);
var desc = main.bigImgEl.attr("data-img-desc-" + randNum);
return {
src : src,
desc : desc
}
},
setImg : function(src, desc) {
$(".intro-header.big-img").css("background-image", 'url(' + src + ')');
if (typeof desc !== typeof undefined && desc !== false) {
$(".img-desc").text(desc).show();
} else {
$(".img-desc").hide();
}
}
};
// 2fc73a3a967e97599c9763d05e564189
document.addEventListener('DOMContentLoaded', main.init);