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| /*! (c) Mat Marquis (@wilto). MIT License. [url]http://wil.to/3a[/url] */
(function( $, undefined ) {
var inst = 0;
$.fn.getPercentage = function() {
var oPercent = this.attr('style').match(/margin\-left:(.*[0-9])/i) && parseInt(RegExp.$1);
return oPercent;
};
$.fn.adjRounding = function(slide) {
var $el = $(this),
$slides = $el.find( slide ),
diff = $el.parent().width() - $slides.eq(0).width();
if (diff !== 0) {
$slides.css( "position", "relative" );
for (var i = 0; i < $slides.length; i++) {
$slides.eq(i).css( "left", (diff * i) + "px" );
}
}
return this;
};
$.fn.carousel = function(config) {
// Prevent re-init:
if( this.data( "carousel-initialized" ) ) { return; }
// Carousel is being initialized:
this.data( "carousel-initialized", true );
var defaults = {
slider : '.slider',
slide : '.slide',
prevSlide : null,
nextSlide : null,
slideHed : null,
addPagination : false,
addNav : ( config != undefined && ( config.prevSlide || config.nextSlide ) ) ? false : true,
namespace : 'carousel',
speed : 300
},
opt = $.extend(defaults, config),
$slidewrap = this,
dBody = (document.body || document.documentElement),
transitionSupport = function() {
dBody.setAttribute('style', 'transition:top 1s ease;-webkit-transition:top 1s ease;-moz-transition:top 1s ease;');
var tSupport = !!(dBody.style.transition || dBody.style.webkitTransition || dBody.style.msTransition || dBody.style.OTransition || dBody.style.MozTransition )
return tSupport;
},
carousel = {
init : function() {
inst++;
$slidewrap.each(function(carInt) {
var $wrap = $(this),
$slider = $wrap.find(opt.slider),
$slide = $wrap.find(opt.slide),
slidenum = $slide.length,
transition = "margin-left " + ( opt.speed / 1000 ) + "s ease",
tmp = 'carousel-' + inst + '-' + carInt;
if( $slide.length <= 1 ) {
return; /* No sense running all this code if the carousel functionality is unnecessary. */
}
$wrap
.css({
"overflow" : "hidden",
"width" : "100%"
})
.attr('role' , 'application');
$slider
.attr( 'id', ( $slider[0].id || 'carousel-' + inst + '-' + carInt ) )
.css({
"marginLeft" : "0px",
"float" : "left",
"width" : 100 * slidenum + "%",
"-webkit-transition" : transition,
"-moz-transition" : transition,
"-ms-transition" : transition,
"-o-transition" : transition,
"transition" : transition
})
.bind( 'carouselmove' , carousel.move )
.bind( 'nextprev' , carousel.nextPrev )
.bind( 'navstate' , carousel.navState );
$slide
.css({
"float": "left",
width: (100 / slidenum) + "%"
})
.each(function(i) {
var $el = $(this);
$el.attr({
"role" : "tabpanel document",
"id" : tmp + '-slide' + i
});
if( opt.addPagination ) {
$el.attr('aria-labelledby', tmp + '-tab' + i);
}
});
// Build and insert navigation/pagination, if specified in the options:
opt.addPagination && carousel.addPagination();
opt.addNav && carousel.addNav();
$slider.trigger( "navstate", { "current": 0 });
});
},
addNav : function() {
$slidewrap.each(function(i) {
var $oEl = $(this),
$slider = $oEl.find(opt.slider),
currentSlider = $slider[0].id,
navMarkup = [
'<ul class="slidecontrols" role="navigation">',
' <li role="presentation"><a href="#' + currentSlider + '" class="' + opt.namespace + '-next">Next</a></li>',
' <li role="presentation"><a href="#' + currentSlider + '" class="' + opt.namespace + '-prev">Prev</a></li>',
'</ul>'
].join(''),
nextprev = {
nextSlide : '.' + opt.namespace + '-next',
prevSlide : '.' + opt.namespace + '-prev'
};
opt = $.extend(opt, nextprev);
$oEl.prepend(navMarkup);
});
},
addPagination : function() {
$slidewrap.each(function(i) {
var $oEl = $(this),
$pagination = $('<ol class="' + opt.namespace + '-tabs" role="tablist navigation" />'),
$slider = $oEl.find(opt.slider),
$slides = $oEl.find(opt.slide)
slideNum = $slides.length,
associated = 'carousel-' + inst + '-' + i;
while( slideNum-- ) {
var hed = $slides.eq(slideNum).find( opt.slideHed ).text() || 'Page ' + ( slideNum + 1 ),
tabMarkup = [
'<li role="presentation">',
'<a href="#' + associated + '-slide' + slideNum +'"',
' aria-controls="' + associated + '-slide' + slideNum +'"',
' id="' + associated + '-tab' + slideNum + '" role="tab">' + hed + '</a>',
'</li>'
].join('');
$pagination.prepend(tabMarkup);
};
$pagination
.appendTo( $oEl )
.find('li').keydown( function(e) {
var $el = $(this),
$prevTab = $el.prev().find('a'),
$nextTab = $el.next().find('a');
switch( e.which ) {
case 37:
case 38:
$prevTab.length && $prevTab.trigger('click').focus();
e.preventDefault();
break;
case 39:
case 40:
$nextTab.length && $nextTab.trigger('click').focus();
e.preventDefault();
break;
}
})
.find('a').click( function(e) {
var $el = $(this);
if( $el.attr('aria-selected') == 'false' ) {
var current = $el.parent().index(),
move = -( 100 * ( current ) ),
$slider = $oEl.find( opt.slider );
$slider.trigger( 'carouselmove', { moveTo: move });
}
e.preventDefault();
});
});
},
roundDown : function(oVal) {
var val = parseInt(oVal, 10);
return Math.ceil( (val - (val % 100 ) ) / 100) * 100;
},
navState : function(e, ui) {
var $el = $(this),
$slides = $el.find(opt.slide),
ind = -(ui.current / 100),
$activeSlide = $slides.eq(ind);
$el.attr('aria-activedescendant', $activeSlide[0].id);
// Update state of active tabpanel:
$activeSlide
.addClass( opt.namespace + "-active-slide" )
.attr( 'aria-hidden', false )
.siblings()
.removeClass( opt.namespace + "-active-slide" )
.attr( 'aria-hidden', true );
// Update state of next/prev navigation:
if( ( !!opt.prevSlide || !!opt.nextSlide ) ) {
var $target = $('[href*="#' + this.id + '"]');
$target.removeClass( opt.namespace + '-disabled' );
if( ind == 0 ) {
$target.filter(opt.prevSlide).addClass( opt.namespace + '-disabled' );
} else if( ind == $slides.length - 1 ) {
$target.filter(opt.nextSlide).addClass( opt.namespace + '-disabled' );
}
}
// Update state of pagination tabs:
if( !!opt.addPagination ) {
var tabId = $activeSlide.attr('aria-labelledby'),
$tab = $('#' + tabId );
$tab
.parent()
.addClass(opt.namespace + '-active-tab')
.siblings()
.removeClass(opt.namespace + '-active-tab')
.find('a')
.attr({
'aria-selected' : false,
'tabindex' : -1
});
$tab.attr({
'aria-selected' : true,
'tabindex' : 0
});
}
},
move : function(e, ui) {
var $el = $(this);
$el
.trigger(opt.namespace + "-beforemove")
.trigger("navstate", { current: ui.moveTo });
if( transitionSupport() ) {
$el
.adjRounding( opt.slide ) /* Accounts for browser rounding errors. Lookin’ at you, iOS Safari. */
.css('marginLeft', ui.moveTo + "%")
.one("transitionend webkitTransitionEnd OTransitionEnd", function() {
$(this).trigger( opt.namespace + "-aftermove" );
});
} else {
$el
.adjRounding( opt.slide )
.animate({ "marginLeft": ui.moveTo + "%" }, { "duration" : opt.speed, "queue" : false }, function() {
$(this).trigger( opt.namespace + "-aftermove" );
});
}
},
nextPrev : function(e, ui) {
var $el = $(this),
left = ( $el ) ? $el.getPercentage() : 0,
$slide = $el.find(opt.slide),
constrain = ui.dir === 'prev' ? left != 0 : -left < ($slide.length - 1) * 100,
$target = $( '[href="#' + this.id + '"]');
if (!$el.is(":animated") && constrain ) {
if ( ui.dir === 'prev' ) {
left = ( left % 100 != 0 ) ? carousel.roundDown(left) : left + 100;
} else {
left = ( ( left % 100 ) != 0 ) ? carousel.roundDown(left) - 100 : left - 100;
}
$el.trigger('carouselmove', { 'moveTo': left });
$target
.removeClass( opt.namespace + '-disabled')
.removeAttr('aria-disabled');
switch( left ) {
case ( -($slide.length - 1) * 100 ):
$target.filter(opt.nextSlide)
.addClass( opt.namespace + '-disabled')
.attr('aria-disabled', true);
break;
case 0:
$target.filter(opt.prevSlide)
.addClass( opt.namespace + '-disabled')
.attr('aria-disabled', true);
break;
}
} else {
var reset = carousel.roundDown(left);
$el.trigger('carouselmove', { 'moveTo': reset });
}
}
};
carousel.init(this);
$(opt.nextSlide + ',' + opt.prevSlide)
.bind('click', function(e) {
var $el = $(this),
link = this.hash,
dir = ( $el.is(opt.prevSlide) ) ? 'prev' : 'next',
$slider = $(link);
if ( $el.is('.' + opt.namespace + '-disabled') ) {
return false;
}
$slider.trigger('nextprev', { 'dir': dir });
e.preventDefault();
})
.bind('keydown', function(e) {
var $el = $(this),
link = this.hash;
switch (e.which) {
case 37:
case 38:
$('#' + link).trigger('nextprev', { 'dir': 'next' });
e.preventDefault();
break;
case 39:
case 40:
$('#' + link).trigger('nextprev', { 'dir': 'prev' });
e.preventDefault();
break;
}
});
var setup = {
'wrap' : this,
'slider' : opt.slider
};
$slidewrap.bind( "dragSnap", setup, function(e, ui){
var $slider = $(this).find( opt.slider ),
dir = ( ui.direction === "left" ) ? 'next' : 'prev';
$slider.trigger("nextprev", { 'dir': dir });
});
$slidewrap.filter('[data-autorotate]').each(function() {
var auto,
$el = $(this),
speed = $el.attr('data-autorotate'),
slidenum = $el.find(opt.slide).length,
autoAdvance = function() {
var $slider = $el.find(opt.slider),
active = -( $(opt.slider).getPercentage() / 100 ) + 1;
switch( active ) {
case slidenum:
clearInterval(auto);
auto = setInterval(function() {
autoAdvance();
$slider.trigger("nextprev", { 'dir': 'prev' });
}, speed);
break;
case 1:
clearInterval(auto);
auto = setInterval(function() {
autoAdvance();
$slider.trigger("nextprev", { 'dir': 'next' });
}, speed);
break;
}
};
auto = setInterval(autoAdvance, speed);
$el
.attr('aria-live', 'polite')
.bind('mouseenter click touchstart', function() {
clearInterval(auto);
});
});
return this;
};
$.event.special.dragSnap = {
setup: function(setup) {
var $el = $(this),
transitionSwap = function($el, tog) {
var speed = .3,
transition = ( tog ) ? "margin-left " + speed + "s ease" : 'none';
$el.css({
"-webkit-transition" : transition,
"-moz-transition" : transition,
"-ms-transition" : transition,
"-o-transition" : transition,
"transition" : transition
});
},
roundDown = function(left) {
var left = parseInt(left, 10);
return Math.ceil( (left - (left % 100 ) ) / 100) * 100;
},
snapBack = function(e, ui) {
var $el = ui.target,
currentPos = ( $el.attr('style') != undefined ) ? $el.getPercentage() : 0,
left = (ui.left === false) ? roundDown(currentPos) - 100 : roundDown(currentPos),
dBody = document.body,
transitionSupport = function() {
dBody.setAttribute('style', 'transition:top 1s ease;-webkit-transition:top 1s ease;-moz-transition:top 1s ease;');
var tSupport = !!(dBody.style.transition || dBody.style.webkitTransition || dBody.style.MozTransition )
return tSupport;
};
transitionSwap($el, true);
if( transitionSupport() ) {
$el.css('marginLeft', left + "%");
} else {
$el.animate({ marginLeft: left + "%" }, opt.speed);
}
};
$el
.bind("snapback", snapBack)
.bind("touchstart", function(e) {
var data = e.originalEvent.touches ? e.originalEvent.touches[0] : e,
$target = $(e.target),
start = {
'time': +new Date,
'coords': [ data.pageX, data.pageY ],
'origin': $target.closest( setup.wrap ),
'interacting': false
},
stop,
$tEl = $target.closest( setup.slider ),
currentPos = ( $tEl.attr('style') != undefined ) ? $tEl.getPercentage() : 0;
transitionSwap($tEl, false);
function moveHandler(e) {
var data = e.originalEvent.touches ? e.originalEvent.touches[0] : e;
stop = {
'time': +new Date,
'coords': [ data.pageX, data.pageY ]
},
deltaX = Math.abs( start.coords[0] - data.pageX ),
deltaY = Math.abs( start.coords[1] - data.pageY );
if( !start || deltaX < deltaY || deltaX < 55 ) {
return;
}
// prevent scrolling
if ( deltaX >= 55 ) {
start.interacting = true;
$tEl.css({"margin-left": currentPos + ( ( (stop.coords[0] - start.coords[0]) / start.origin.width() ) * 100 ) + '%' });
e.preventDefault();
} else {
return;
}
};
$el
.bind("gesturestart", function(e) {
$el
.unbind("touchmove", moveHandler)
.unbind("touchend", moveHandler);
})
.bind("touchmove", moveHandler)
.one("touchend", function(e) {
$el.unbind("touchmove", moveHandler);
transitionSwap($tEl, true);
if (start && stop ) {
var deltaX = Math.abs(start.coords[0] - stop.coords[0]),
deltaY = Math.abs(start.coords[1] - stop.coords[1]),
left = start.coords[0] > stop.coords[0],
jumppoint;
if( deltaX > 20 && ( deltaX > deltaY ) ) {
e.preventDefault();
} else {
if( start.interacting ) {
$el.trigger('snapback', { 'target': $tEl, 'left': left });
}
return;
}
jumppoint = start.origin.width() / 4;
if( -deltaX > jumppoint || deltaX > jumppoint ) {
start.origin.trigger("dragSnap", {'direction': left ? "left" : "right"});
} else {
$el.trigger('snapback', { 'target': $tEl, 'left': left });
}
}
start = stop = undefined;
});
});
}
};
})(jQuery); |
(
