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curtain.js
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/*
* Curtain.js - Create an unique page transitioning system
* ---
* Version: 1.4.1
* Copyright 2011, Victor Coulon (http://victorcoulon.fr)
* Released under the MIT Licence
*/
(function ( $, window, document, undefined ) {
var pluginName = 'curtain',
defaults = {
scrollSpeed: 400,
bodyHeight: 0,
linksArray: [],
mobile: false,
scrollButtons: {},
controls: null,
curtainLinks: '.curtain-links',
enableKeys: true,
easing: 'swing',
nextSlide: null,
prevSlide: null
};
// The actual plugin constructor
function Plugin( element, options ) {
var self = this;
// Public attributes
this.element = element;
this.options = $.extend( {}, defaults, options) ;
this._defaults = defaults;
this._name = pluginName;
this._ignoreHashChange = false;
this.init();
// Public Functions
this.insert = function(content){
if(Object.prototype.toString.call(content) !== '[object Object]') {
throw new TypeError('Content must be an object');
}
content.goTo = (content.goTo === true) ? true : false;
// append the content to list
var newEl = $(document.createElement('li')).attr('id', (content.htmlId) ? content.htmlId : null)
.attr('class', (content.htmlClass) ? content.htmlClass : null)
.html( (content.html) ? content.html : null );
$(self.element).append(newEl);
// Append Content after an element OR at the end
if(content.insertAfter && $(content.insertAfter).length) {
$(self.element).find(content.insertAfter).after(newEl);
} else {
$(self.element).append(newEl);
}
// When the element is ready
self.readyElement($(newEl), function(){
// re(init) cache elements
self.$element = $(self.element);
self.$li = $(self.element).find('>li');
// Mobile Fix
if(self.options.mobile){
self.$li.css({position:'relative'});
self.$element.find('.fixed').css({position:'absolute'});
}
self.setLinks();
// Set dimensions after loading images (or not)
if($(newEl).find('img').length){
$(newEl).find('img').load(function(){
self.setDimensions();
});
} else {
self.setDimensions();
}
// Scroll to the new element
if(content.goTo === true){
var position = $(newEl).attr('data-position') || null;
self.scrollEl.animate({
scrollTop:position
}, self.options.scrollSpeed, self.options.easing);
}
});
};
}
Plugin.prototype = {
init: function () {
var self = this;
// Cache element
this.$element = $(this.element);
this.$li = $(this.element).find('>li');
$.Android = (navigator.userAgent.match(/Android/i));
$.iPhone = ((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i)));
$.iPad = ((navigator.userAgent.match(/iPad/i)));
$.iOs4 = (/OS [1-4]_[0-9_]+ like Mac OS X/i.test(navigator.userAgent));
if($.iPhone || $.iPad || $.Android){
this.options.mobile = true;
this.$li.css({position:'relative'});
this.$element.find('.fixed').css({position:'absolute'});
}
if(this.options.mobile){
this.scrollEl = this.$element;
} else if($.browser.mozilla || $.browser.msie) {
this.scrollEl = $('html');
} else {
this.scrollEl = $('body');
}
if(self.options.controls){
self.options.scrollButtons['up'] = $(self.options.controls).find('[href="#up"]');
self.options.scrollButtons['down'] = $(self.options.controls).find('[href="#down"]');
if(!$.iOs4 && ($.iPhone || $.iPad)){
self.$element.css({
position:'fixed',
top:0,
left:0,
right:0,
bottom:0,
'-webkit-overflow-scrolling':'touch',
overflow:'auto'
});
$(self.options.controls).css({position:'absolute'});
}
}
// We'll check if our images are loaded
var images = [],
imagesLoaded = 0,
loadAllImages = function loadAllImages(callback){
if(images.length === 0){
callback();
return false;
}
var img = new Image();
$(img).attr('src',images[imagesLoaded]).load(function(){
imagesLoaded++;
if(imagesLoaded == images.length)
callback();
else
loadAllImages(callback);
});
};
self.$element.find('img').each(function(i,el){
images.push(el.src);
});
// When all image is loaded
loadAllImages(function(){
self.setDimensions();
self.$li.eq(0).addClass('current');
// Cache
self.$current = self.$element.find('.current');
self.$fixed = self.$current.find('.fixed');
self.$step = self.$current.find('.step');
self.currentP = parseInt(self.$current.attr('data-position'), 10);
self.currentHeight = parseInt(self.$current.attr('data-height'), 10);
if(!self.options.mobile){
if(self.$li.eq(1).length)
self.$li.eq(1).nextAll().css({display:'none'});
}
self.setEvents();
self.setLinks();
self.isHashIsOnList(location.hash.substring(1));
});
},
// Events
scrollToPosition: function (direction){
var position = null,
self = this;
if($('html, body').is(':animated')){
return false;
}
if(direction === 'up' || direction == 'down'){
// Keyboard event
var $current = this.$element.find('.current'),
$next = (direction === 'up') ? $current.prev() : $current.next();
position = $next.attr('data-position') || null;
// Step in the current panel ?
if($current.find('.step').length){
if(!$current.find('.current-step').length)
$current.find('.step').eq(0).addClass('current-step');
var $nextStep = (direction === 'up') ? $current.find('.current-step').prev('.step') : $current.find('.current-step').next('.step');
if($nextStep.length) {
position = (this.options.mobile) ? $nextStep.position().top + parseInt($current.attr('data-position'), 10) : $nextStep.offset().top;
}
}
if(position){
self.scrollEl.animate({
scrollTop:position
}, this.options.scrollSpeed, this.options.easing);
}
} else if(direction === 'top'){
self.scrollEl.animate({
scrollTop:0
}, self.options.scrollSpeed, self.options.easing);
} else if(direction === 'bottom'){
self.scrollEl.animate({
scrollTop:self.options.bodyHeight
}, self.options.scrollSpeed, self.options.easing);
} else {
position = $("#"+direction).attr('data-position') || null;
if(position){
self.scrollEl.animate({
scrollTop:position
}, this.options.scrollSpeed, this.options.easing);
}
}
},
scrollEvent: function() {
var self = this,
docTop = $(document).scrollTop(),
windowHeight = $(window).height();
if(docTop < self.currentP && self.$current.index() > 0){
if (self.options.prevSlide) {
self.options.prevSlide();
}
// Scroll top
self._ignoreHashChange = true;
if(self.$current.prev().attr('id'))
self.setHash(self.$current.prev().attr('id'));
self.$current.removeClass('current').css({marginTop: 0})
.nextAll().css({display:'none'}).end()
.prev().addClass('current').css({display:'block'});
// Cache
self.$current = self.$element.find('.current');
self.$fixed = self.$current.find('.fixed');
self.$step = self.$current.find('.step');
self.currentP = parseInt(self.$current.attr('data-position'), 10);
self.currentHeight = parseInt(self.$current.attr('data-height'), 10);
} else if(docTop < (self.currentP + self.$current.height())){
// Animate the current pannel during the scroll
var position = -(docTop-self.currentP);
self.$current.css({marginTop:position});
// If there is a fixed element in the current panel
if(self.$fixed.length){
var dataTop = parseInt(self.$fixed.attr('data-top'), 10);
if((docTop-self.currentP+windowHeight) >= self.currentHeight && self.$fixed.css('position') === 'fixed'){
self.$fixed.css({
position: 'absolute',
top: Math.abs(docTop-self.currentP + dataTop)
});
} else if((docTop-self.currentP+windowHeight) <= self.currentHeight && self.$fixed.css('position') === 'absolute'){
self.$fixed.css({
position: 'fixed',
top: dataTop
});
}
}
// If there is a step element in the current panel
if(self.$step.length){
$.each(self.$step, function(i,el){
if($(el).offset().top <= docTop+5 && ($(el).offset().top + $(el).outerHeight()) >= docTop+5){
if(!$(el).hasClass('current-step')){
self.$step.removeClass('current-step');
$(el).addClass('current-step');
}
}
});
}
} else {
if (self.options.nextSlide) {
self.options.nextSlide();
}
// Scroll bottom
self._ignoreHashChange = true;
if(self.$current.next().attr('id'))
self.setHash(self.$current.next().attr('id'));
self.$current.removeClass('current')
.css({display:'none'})
.next().addClass('current').nextAll().css({display:'block'});
// Cache
self.$current = self.$element.find('.current');
self.$fixed = self.$current.find('.fixed');
self.$step = self.$current.find('.step');
self.currentP = parseInt(self.$current.attr('data-position'), 10);
self.currentHeight = parseInt(self.$current.attr('data-height'), 10);
}
},
scrollMobileEvent: function() {
var self = this;
var docTop = self.$element.scrollTop(),
$current = self.$element.find('.current'),
$step = $current.find('.step'),
currentP = parseInt($current.attr('data-position'), 10),
currentHeight = parseInt($current.attr('data-height'), 10),
windowHeight = $(window).height();
if(docTop+10 < currentP && $current.index() > 0){
$current.removeClass('current').prev().addClass('current');
} else if(docTop+10 < (currentP + $current.height())){
// If there is a step element in the current panel
if($step.length){
$.each($step, function(i,el){
if(($(el).position().top+currentP) <= docTop && (($(el).position().top+currentP) + $(el).outerHeight()) >= docTop){
if(!$(el).hasClass('current-step')){
$step.removeClass('current-step');
$(el).addClass('current-step');
}
}
});
}
} else {
$current.removeClass('current').next().addClass('current');
}
},
// Setters
setDimensions: function(){
var windowHeight = $(window).height(),
levelHeight = 0,
cover = false,
height = null;
this.$li.each(function(index) {
var $self = $(this);
cover = $self.hasClass('cover');
if(cover){
$self.css({height: windowHeight, zIndex: 999-index})
.attr('data-height',windowHeight)
.attr('data-position',levelHeight);
levelHeight += windowHeight;
} else{
height = ($self.outerHeight() <= windowHeight) ? windowHeight : $self.outerHeight();
$self.css({minHeight: height, zIndex: 999-index})
.attr('data-height',height)
.attr('data-position',levelHeight);
levelHeight += height;
}
if($self.find('.fixed').length){
var top = $self.find('.fixed').css('top');
$self.find('.fixed').attr('data-top', top);
}
});
if(!this.options.mobile)
this.setBodyHeight();
},
setEvents: function() {
var self = this;
$(window).on('resize', function(){
self.setDimensions();
});
if(self.options.mobile) {
self.$element.on('scroll', function(){
self.scrollMobileEvent();
});
} else {
$(window).on('scroll', function(){
self.scrollEvent();
});
}
if(self.options.enableKeys) {
$(document).on('keydown', function(e){
if(e.keyCode === 38 || e.keyCode === 37) {
self.scrollToPosition('up');
e.preventDefault();
return false;
}
if(e.keyCode === 40 || e.keyCode === 39){
self.scrollToPosition('down');
e.preventDefault();
return false;
}
// Home button
if(e.keyCode === 36){
self.scrollToPosition('top');
e.preventDefault();
return false;
}
// End button
if(e.keyCode === 35){
self.scrollToPosition('bottom');
e.preventDefault();
return false;
}
});
}
if(self.options.scrollButtons){
if(self.options.scrollButtons.up){
self.options.scrollButtons.up.on('click', function(e){
e.preventDefault();
self.scrollToPosition('up');
});
}
if(self.options.scrollButtons.down){
self.options.scrollButtons.down.on('click', function(e){
e.preventDefault();
self.scrollToPosition('down');
});
}
}
if(self.options.curtainLinks){
$(self.options.curtainLinks).on('click', function(e){
e.preventDefault();
var href = $(this).attr('href');
if(!self.isHashIsOnList(href.substring(1)) && position)
return false;
var position = $(href).attr('data-position') || null;
if(position){
self.scrollEl.animate({
scrollTop:position
}, self.options.scrollSpeed, self.options.easing);
}
return false;
});
}
if ("onhashchange" in window) {
window.addEventListener("hashchange", function(){
if(self._ignoreHashChange === false){
self.isHashIsOnList(location.hash.substring(1));
}
self._ignoreHashChange = false;
}, false);
}
},
setBodyHeight: function(){
var h = 0;
this.$li.each(function() {
h += $(this).height();
});
this.options.bodyHeight = h;
$('body').height(h);
},
setLinks: function(){
var self = this;
this.$li.each(function() {
var id = $(this).attr('id') || 0;
self.options.linksArray.push(id);
});
},
setHash: function(hash){
if(history.pushState) {
history.pushState(null, null, '#'+hash);
}
else {
location.hash = hash;
}
},
// Utils
isHashIsOnList: function(hash){
var self = this;
$.each(self.options.linksArray, function(i,val){
if(val === hash){
self.scrollToPosition(hash);
return false;
}
});
},
readyElement: function(el,callback){
var interval = setInterval(function(){
if(el.length){
callback(el.length);
clearInterval(interval);
}
},60);
}
};
$.fn[pluginName] = function ( options ) {
return this.each(function () {
if (!$.data(this, 'plugin_' + pluginName)) {
$.data(this, 'plugin_' + pluginName, new Plugin( this, options ));
}
});
};
})( jQuery, window, document );