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$(function() {
// $(document).foundation();
var $sidebar = $('#sidebar');
if ($sidebar.length) {
var $docs = $('#docs');
var $nav = $sidebar.find('nav');
//
// Setup sidebar navigation
var traverse = new Traverse($nav, {
threshold: 10,
barOffset: $sidebar.position().top
});
$nav.on('update.traverse', function(event, element) {
$nav.find('section').removeClass('expand');
var $section = element.parents('section:first');
if ($section.length) {
$section.addClass('expand');
}
});
//
// Bind the drawer layout
var $drawerLayout = $('.drawer-layout'),
$drawer = $drawerLayout.find('.drawer'),
closeDrawer = function() {
$drawer.removeClass('slide-right slide-left');
$drawer.find('.drawer-overlay').remove();
$drawerLayout.removeClass('drawer-open drawer-slide-left-large drawer-slide-right-large');
return false;
};
// Drawer open buttons
$drawerLayout.find('[data-drawer-slide]').click(function(e) {
var $this = $(this),
direction = $this.data('drawer-slide');
$drawerLayout.addClass('drawer-open');
$drawer.addClass('slide-' + direction);
var $overlay = $('<a href="#" class="drawer-overlay"></a>')
$drawer.append($overlay);
$overlay.click(closeDrawer);
return false;
});
// Drawer close buttons
$drawerLayout.find('[data-drawer-close]').click(closeDrawer);
}
});
/**
* Creates a new instance of Traverse.
* @class
* @fires Traverse#init
* @param {Object} element - jQuery object to add the trigger to.
* @param {Object} options - Overrides to the default plugin settings.
*/
function Traverse(element, options) {
this.$element = element;
this.options = $.extend({}, Traverse.defaults, this.$element.data(), options);
this._init();
}
/**
* Default settings for plugin
*/
Traverse.defaults = {
/**
* Amount of time, in ms, the animated scrolling should take between locations.
* @option
* @example 500
*/
animationDuration: 500,
/**
* Animation style to use when scrolling between locations.
* @option
* @example 'ease-in-out'
*/
animationEasing: 'linear',
/**
* Number of pixels to use as a marker for location changes.
* @option
* @example 50
*/
threshold: 50,
/**
* Class applied to the active locations link on the traverse container.
* @option
* @example 'active'
*/
activeClass: 'active',
/**
* Allows the script to manipulate the url of the current page, and if supported, alter the history.
* @option
* @example true
*/
deepLinking: false,
/**
* Number of pixels to offset the scroll of the page on item click if using a sticky nav bar.
* @option
* @example 25
*/
barOffset: 0
};
/**
* Initializes the Traverse plugin and calls functions to get equalizer functioning on load.
* @private
*/
Traverse.prototype._init = function() {
var id = this.$element[0].id, // || Foundation.GetYoDigits(6, 'traverse'),
_this = this;
this.$targets = $('[data-traverse-target]');
this.$links = this.$element.find('a');
this.$element.attr({
'data-resize': id,
'data-scroll': id,
'id': id
});
this.$active = $();
this.scrollPos = parseInt(window.pageYOffset, 10);
this._events();
};
/**
* Calculates an array of pixel values that are the demarcation lines between locations on the page.
* Can be invoked if new elements are added or the size of a location changes.
* @function
*/
Traverse.prototype.calcPoints = function(){
var _this = this,
body = document.body,
html = document.documentElement;
this.points = [];
this.winHeight = Math.round(Math.max(window.innerHeight, html.clientHeight));
this.docHeight = Math.round(Math.max(body.scrollHeight, body.offsetHeight, html.clientHeight, html.scrollHeight, html.offsetHeight));
this.$targets.each(function(){
var $tar = $(this),
pt = $tar.offset().top; // Math.round($tar.offset().top - _this.options.threshold);
$tar.targetPoint = pt;
_this.points.push(pt);
});
};
/**
* Initializes events for Traverse.
* @private
*/
Traverse.prototype._events = function() {
var _this = this,
$body = $('html, body'),
opts = {
duration: _this.options.animationDuration,
easing: _this.options.animationEasing
};
$(window).one('load', function(){
_this.calcPoints();
_this._updateActive();
$(this).resize(function(e) {
_this.reflow();
}).scroll(function(e) {
_this._updateActive();
});
})
this.$element.on('click', 'a[href^="#"]', function(e) { //'click.zf.traverse'
e.preventDefault();
var arrival = this.getAttribute('href').replace(".", "\\."),
scrollPos = $(arrival).offset().top - _this.options.barOffset; // - _this.options.threshold / 2 - _this.options.barOffset;
$body.stop(true).animate({
scrollTop: scrollPos
}, opts);
});
};
/**
* Calls necessary functions to update Traverse upon DOM change
* @function
*/
Traverse.prototype.reflow = function(){
this.calcPoints();
this._updateActive();
};
/**
* Updates the visibility of an active location link,
* and updates the url hash for the page, if deepLinking enabled.
* @private
* @function
* @fires Traverse#update
*/
Traverse.prototype._updateActive = function(){
var winPos = parseInt(window.pageYOffset, 10),
curIdx;
if(winPos + this.winHeight === this.docHeight){ curIdx = this.points.length - 1; }
else if(winPos < this.points[0]){ curIdx = 0; }
else{
var isDown = this.scrollPos < winPos,
_this = this,
curVisible = this.points.filter(function(p, i){
return isDown ?
p <= (winPos + _this.options.barOffset + _this.options.threshold) :
(p - (_this.options.barOffset + _this.options.threshold)) <= winPos;
// p <= (winPos - (offset - _this.options.threshold)) :
// (p - (-offset + _this.options.threshold)) <= winPos;
});
curIdx = curVisible.length ? curVisible.length - 1 : 0;
}
var $prev = this.$active;
var $next = this.$links.eq(curIdx);
this.$active.removeClass(this.options.activeClass);
this.$active = $next.addClass(this.options.activeClass);
if(this.options.deepLinking){
var hash = this.$active[0].getAttribute('href');
if(window.history.pushState){
window.history.pushState(null, null, hash);
}else{
window.location.hash = hash;
}
}
this.scrollPos = winPos;
// Fire event if the active element was changed
var changed = $prev[0] !== $next[0];
if (changed) {
this.$element.trigger('update.traverse', [this.$active]);
}
};
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