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$(document).ready(function() {
// prep nav expandos
var pagePath = document.location.pathname;
if (pagePath.indexOf(SITE_ROOT) == 0) {
pagePath = pagePath.substr(SITE_ROOT.length);
if (pagePath == '' || pagePath.charAt(pagePath.length - 1) == '/') {
pagePath += 'index.html';
}
}
if (SITE_ROOT.match(/\.\.\//) || SITE_ROOT == '') {
// If running locally, SITE_ROOT will be a relative path, so account for that by
// finding the relative URL to this page. This will allow us to find links on the page
// leading back to this page.
var pathParts = pagePath.split('/');
var relativePagePathParts = [];
var upDirs = (SITE_ROOT.match(/(\.\.\/)+/) || [''])[0].length / 3;
for (var i = 0; i < upDirs; i++) {
relativePagePathParts.push('..');
}
for (var i = 0; i < upDirs; i++) {
relativePagePathParts.push(pathParts[pathParts.length - (upDirs - i) - 1]);
}
relativePagePathParts.push(pathParts[pathParts.length - 1]);
pagePath = relativePagePathParts.join('/');
} else {
// Otherwise the page path should be an absolute URL.
pagePath = SITE_ROOT + pagePath;
}
// select current page in sidenav and set up prev/next links if they exist
var $selNavLink = $('.nav-y').find('a[href="' + pagePath + '"]');
if ($selNavLink.length) {
$selListItem = $selNavLink.closest('li');
$selListItem.addClass('selected');
$selListItem.closest('li>ul').addClass('expanded');
// set up prev links
var $prevLink = [];
var $prevListItem = $selListItem.prev('li');
if ($prevListItem.length) {
if ($prevListItem.hasClass('nav-section')) {
// jump to last topic of previous section
$prevLink = $prevListItem.find('a:last');
} else {
// jump to previous topic in this section
$prevLink = $prevListItem.find('a:eq(0)');
}
} else {
// jump to this section's index page (if it exists)
$prevLink = $selListItem.parents('li').find('a');
}
if ($prevLink.length) {
var prevHref = $prevLink.attr('href');
if (prevHref == SITE_ROOT + 'index.html') {
// Don't show Previous when it leads to the homepage
$('.prev-page-link').hide();
} else {
$('.prev-page-link').attr('href', prevHref).show();
}
} else {
$('.prev-page-link').hide();
}
// set up next links
var $nextLink = [];
if ($selListItem.hasClass('nav-section')) {
// we're on an index page, jump to the first topic
$nextLink = $selListItem.find('ul').find('a:eq(0)')
} else {
// jump to the next topic in this section (if it exists)
$nextLink = $selListItem.next('li').find('a:eq(0)');
if (!$nextLink.length) {
// no more topics in this section, jump to the first topic in the next section
$nextLink = $selListItem.parents('li').next('li.nav-section').find('a:eq(0)');
}
}
if ($nextLink.length) {
$('.next-page-link').attr('href', $nextLink.attr('href')).show();
} else {
$('.next-page-link').hide();
}
}
// Set up expand/collapse behavior
$('.nav-y li').has('ul').click(function() {
if ($(this).hasClass('expanded')) {
return;
}
// hide other
var $old = $('.nav-y li.expanded');
if ($old.length) {
var $oldUl = $old.children('ul');
$oldUl.css('height', $oldUl.height() + 'px');
window.setTimeout(function() {
$oldUl
.addClass('animate-height')
.css('height', '');
}, 0);
$old.removeClass('expanded');
}
// show me
$(this).addClass('expanded');
var $ul = $(this).children('ul');
var expandedHeight = $ul.height();
$ul
.removeClass('animate-height')
.css('height', 0);
window.setTimeout(function() {
$ul
.addClass('animate-height')
.css('height', expandedHeight + 'px');
}, 0);
});
// Stop expand/collapse behavior when clicking on nav section links (since we're navigating away
// from the page)
$('.nav-y li').has('ul').find('a:eq(0)').click(function(evt) {
window.location.href = $(this).attr('href');
return false;
});
// Set up play-on-hover <video> tags.
$('video.play-on-hover').bind('click', function(){
$(this).get(0).load(); // in case the video isn't seekable
$(this).get(0).play();
});
// Set up tooltips
var TOOLTIP_MARGIN = 10;
$('acronym').each(function() {
var $target = $(this);
var $tooltip = $('<div>')
.addClass('tooltip-box')
.text($target.attr('title'))
.hide()
.appendTo('body');
$target.removeAttr('title');
$target.hover(function() {
// in
var targetRect = $target.offset();
targetRect.width = $target.width();
targetRect.height = $target.height();
$tooltip.css({
left: targetRect.left,
top: targetRect.top + targetRect.height + TOOLTIP_MARGIN
});
$tooltip.addClass('below');
$tooltip.show();
}, function() {
// out
$tooltip.hide();
});
});
// Set up <h2> deeplinks
$('h2').click(function() {
var id = $(this).attr('id');
if (id) {
document.location.hash = id;
}
});
// Set up fixed navbar
var navBarIsFixed = false;
$(window).scroll(function() {
var scrollTop = $(window).scrollTop();
var navBarShouldBeFixed = (scrollTop > (100 - 40));
if (navBarIsFixed != navBarShouldBeFixed) {
if (navBarShouldBeFixed) {
$('#nav')
.addClass('fixed')
.prependTo('#page-container');
} else {
$('#nav')
.removeClass('fixed')
.prependTo('#nav-container');
}
navBarIsFixed = navBarShouldBeFixed;
}
});
});
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