hacks-guide-minimal-mistake.../assets/js/plugins/jquery.greedy-navigation.js

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/*
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GreedyNav.js - http://lukejacksonn.com/actuate
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Licensed under the MIT license - http://opensource.org/licenses/MIT
Copyright (c) 2015 Luke Jackson
*/
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$(function() {
var $btn = $("nav.greedy-nav .greedy-nav__toggle");
var $vlinks = $("nav.greedy-nav .visible-links");
var $hlinks = $("nav.greedy-nav .hidden-links");
var $nav = $("nav.greedy-nav");
var $logo = $('nav.greedy-nav .site-logo');
var $logoImg = $('nav.greedy-nav .site-logo img');
var $title = $("nav.greedy-nav .site-title");
var $search = $('nav.greedy-nav button.search__toggle');
var numOfItems, totalSpace, closingTime, breakWidths;
// This function measures both hidden and visible links and sets the navbar breakpoints
// This is called the first time the script runs and everytime the "check()" function detects a change of window width that reached a different CSS width breakpoint, which affects the size of navbar Items
// Please note that "CSS width breakpoints" (which are only 4) !== "navbar breakpoints" (which are as many as the number of items on the navbar)
function measureLinks(){
numOfItems = 0;
totalSpace = 0;
closingTime = 1000;
breakWidths = [];
// Adds the width of a navItem in order to create breakpoints for the navbar
function addWidth(i, w) {
totalSpace += w;
numOfItems += 1;
breakWidths.push(totalSpace);
}
// Measures the width of hidden links by making a temporary clone of them and positioning under visible links
function hiddenWidth(obj){
var clone = obj.clone();
clone.css("visibility","hidden");
$vlinks.append(clone);
addWidth(0, clone.outerWidth());
clone.remove();
}
// Measure both visible and hidden links widths
$vlinks.children().outerWidth(addWidth);
$hlinks.children().each(function(){hiddenWidth($(this))});
}
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// Get initial state
measureLinks();
var winWidth = $( window ).width();
// Set the last measured CSS width breakpoint: 0: <768px, 1: <1024px, 2: < 1280px, 3: >= 1280px.
var lastBreakpoint = winWidth < 768 ? 0 : winWidth < 1024 ? 1 : winWidth < 1280 ? 2 : 3;
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var availableSpace, numOfVisibleItems, requiredSpace, timer;
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function check() {
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winWidth = $( window ).width();
// Set the current CSS width breakpoint: 0: <768px, 1: <1024px, 2: < 1280px, 3: >= 1280px.
var curBreakpoint = winWidth < 768 ? 0 : winWidth < 1024 ? 1 : winWidth < 1280 ? 2 : 3;
// If current breakpoint is different from last measured breakpoint, measureLinks again
if(curBreakpoint !== lastBreakpoint) measureLinks();
// Set the last measured CSS width breakpoint with the current breakpoint
lastBreakpoint = curBreakpoint;
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// Get instant state
numOfVisibleItems = $vlinks.children().length;
// Decrease the width of visible elements from the nav innerWidth to find out the available space for navItems
availableSpace = /* nav */ $nav.innerWidth()
- /* logo */ ($logo.length !== 0 ? $logo.outerWidth(true) : 0)
- /* title */ $title.outerWidth(true)
- /* search */ ($search.length !== 0 ? $search.outerWidth(true) : 0)
- /* toggle */ (numOfVisibleItems !== breakWidths.length ? $btn.outerWidth(true) : 0);
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requiredSpace = breakWidths[numOfVisibleItems - 1];
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// There is not enought space
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if (requiredSpace > availableSpace) {
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$vlinks.children().last().prependTo($hlinks);
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numOfVisibleItems -= 1;
check();
// There is more than enough space. If only one element is hidden, add the toggle width to the available space
} else if (availableSpace + (numOfVisibleItems === breakWidths.length - 1?$btn.outerWidth(true):0) > breakWidths[numOfVisibleItems]) {
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$hlinks.children().first().appendTo($vlinks);
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numOfVisibleItems += 1;
check();
}
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// Update the button accordingly
$btn.attr("count", numOfItems - numOfVisibleItems);
if (numOfVisibleItems === numOfItems) {
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$btn.addClass('hidden');
} else $btn.removeClass('hidden');
}
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// Window listeners
$(window).resize(function() {
check();
});
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$btn.on('click', function() {
$hlinks.toggleClass('hidden');
clearTimeout(timer);
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});
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$hlinks.on('mouseleave', function() {
// Mouse has left, start the timer
timer = setTimeout(function() {
$hlinks.addClass('hidden');
}, closingTime);
}).on('mouseenter', function() {
// Mouse is back, cancel the timer
clearTimeout(timer);
})
// check if page has a logo
if($logoImg.length !== 0){
// check if logo is not loaded
if(!($logoImg[0].complete || $logoImg[0].naturalWidth !== 0)){
// if logo is not loaded wait for logo to load or fail to check
$logoImg.one("load error", check);
// if logo is already loaded just check
} else check();
// if page does not have a logo just check
} else check();
});