/**
* Navigation Plugin
* @version 2.1.0
* @author Artus Kolanowski
* @author David Deutsch
* @license The MIT License (MIT)
*/
;(function($, window, document, undefined) {
'use strict';
/**
* Creates the navigation plugin.
* @class The Navigation Plugin
* @param {Owl} carousel - The Owl Carousel.
*/
var Navigation = function(carousel) {
/**
* Reference to the core.
* @protected
* @type {Owl}
*/
this._core = carousel;
/**
* Indicates whether the plugin is initialized or not.
* @protected
* @type {Boolean}
*/
this._initialized = false;
/**
* The current paging indexes.
* @protected
* @type {Array}
*/
this._pages = [];
/**
* All DOM elements of the user interface.
* @protected
* @type {Object}
*/
this._controls = {};
/**
* Markup for an indicator.
* @protected
* @type {Array.<String>}
*/
this._templates = [];
/**
* The carousel element.
* @type {jQuery}
*/
this.$element = this._core.$element;
/**
* Overridden methods of the carousel.
* @protected
* @type {Object}
*/
this._overrides = {
next: this._core.next,
prev: this._core.prev,
to: this._core.to
};
/**
* All event handlers.
* @protected
* @type {Object}
*/
this._handlers = {
'prepared.owl.carousel': $.proxy(function(e) {
if (e.namespace && this._core.settings.dotsData) {
this._templates.push('<div class="' + this._core.settings.dotClass + '">' +
$(e.content).find('[data-dot]').addBack('[data-dot]').attr('data-dot') + '</div>');
}
}, this),
'added.owl.carousel': $.proxy(function(e) {
if (e.namespace && this._core.settings.dotsData) {
this._templates.splice(e.position, 0, this._templates.pop());
}
}, this),
'remove.owl.carousel': $.proxy(function(e) {
if (e.namespace && this._core.settings.dotsData) {
this._templates.splice(e.position, 1);
}
}, this),
'changed.owl.carousel': $.proxy(function(e) {
if (e.namespace && e.property.name == 'position') {
this.draw();
}
}, this),
'initialized.owl.carousel': $.proxy(function(e) {
if (e.namespace && !this._initialized) {
this._core.trigger('initialize', null, 'navigation');
this.initialize();
this.update();
this.draw();
this._initialized = true;
this._core.trigger('initialized', null, 'navigation');
}
}, this),
'refreshed.owl.carousel': $.proxy(function(e) {
if (e.namespace && this._initialized) {
this._core.trigger('refresh', null, 'navigation');
this.update();
this.draw();
this._core.trigger('refreshed', null, 'navigation');
}
}, this)
};
// set default options
this._core.options = $.extend({}, Navigation.Defaults, this._core.options);
// register event handlers
this.$element.on(this._handlers);
};
/**
* Default options.
* @public
* @todo Rename `slideBy` to `navBy`
*/
Navigation.Defaults = {
nav: false,
navText: [ 'prev', 'next' ],
navSpeed: false,
navElement: 'div',
navContainer: false,
navContainerClass: 'owl-nav',
navClass: [ 'owl-prev', 'owl-next' ],
slideBy: 1,
dotClass: 'owl-dot',
dotsClass: 'owl-dots',
dots: true,
dotsEach: false,
dotsData: false,
dotsSpeed: false,
dotsContainer: false
};
/**
* Initializes the layout of the plugin and extends the carousel.
* @protected
*/
Navigation.prototype.initialize = function() {
var override,
settings = this._core.settings;
// create DOM structure for relative navigation
this._controls.$relative = (settings.navContainer ? $(settings.navContainer)
: $('<div>').addClass(settings.navContainerClass).appendTo(this.$element)).addClass('disabled');
this._controls.$previous = $('<' + settings.navElement + '>')
.addClass(settings.navClass[0])
.html(settings.navText[0])
.prependTo(this._controls.$relative)
.on('click', $.proxy(function(e) {
this.prev(settings.navSpeed);
}, this));
this._controls.$next = $('<' + settings.navElement + '>')
.addClass(settings.navClass[1])
.html(settings.navText[1])
.appendTo(this._controls.$relative)
.on('click', $.proxy(function(e) {
this.next(settings.navSpeed);
}, this));
// create DOM structure for absolute navigation
if (!settings.dotsData) {
this._templates = [ $('<div>')
.addClass(settings.dotClass)
.append($('<span>'))
.prop('outerHTML') ];
}
this._controls.$absolute = (settings.dotsContainer ? $(settings.dotsContainer)
: $('<div>').addClass(settings.dotsClass).appendTo(this.$element)).addClass('disabled');
this._controls.$absolute.on('click', 'div', $.proxy(function(e) {
var index = $(e.target).parent().is(this._controls.$absolute)
? $(e.target).index() : $(e.target).parent().index();
e.preventDefault();
this.to(index, settings.dotsSpeed);
}, this));
// override public methods of the carousel
for (override in this._overrides) {
this._core[override] = $.proxy(this[override], this);
}
};
/**
* Destroys the plugin.
* @protected
*/
Navigation.prototype.destroy = function() {
var handler, control, property, override;
for (handler in this._handlers) {
this.$element.off(handler, this._handlers[handler]);
}
for (control in this._controls) {
this._controls[control].remove();
}
for (override in this.overides) {
this._core[override] = this._overrides[override];
}
for (property in Object.getOwnPropertyNames(this)) {
typeof this[property] != 'function' && (this[property] = null);
}
};
/**
* Updates the internal state.
* @protected
*/
Navigation.prototype.update = function() {
var i, j, k,
lower = this._core.clones().length / 2,
upper = lower + this._core.items().length,
maximum = this._core.maximum(true),
settings = this._core.settings,
size = settings.center || settings.autoWidth || settings.dotsData
? 1 : settings.dotsEach || settings.items;
if (settings.slideBy !== 'page') {
settings.slideBy = Math.min(settings.slideBy, settings.items);
}
if (settings.dots || settings.slideBy == 'page') {
this._pages = [];
for (i = lower, j = 0, k = 0; i < upper; i++) {
if (j >= size || j === 0) {
this._pages.push({
start: Math.min(maximum, i - lower),
end: i - lower + size - 1
});
if (Math.min(maximum, i - lower) === maximum) {
break;
}
j = 0, ++k;
}
j += this._core.mergers(this._core.relative(i));
}
}
};
/**
* Draws the user interface.
* @todo The option `dotsData` wont work.
* @protected
*/
Navigation.prototype.draw = function() {
var difference,
settings = this._core.settings,
disabled = this._core.items().length <= settings.items,
index = this._core.relative(this._core.current()),
loop = settings.loop || settings.rewind;
this._controls.$relative.toggleClass('disabled', !settings.nav || disabled);
if (settings.nav) {
this._controls.$previous.toggleClass('disabled', !loop && index <= this._core.minimum(true));
this._controls.$next.toggleClass('disabled', !loop && index >= this._core.maximum(true));
}
this._controls.$absolute.toggleClass('disabled', !settings.dots || disabled);
if (settings.dots) {
difference = this._pages.length - this._controls.$absolute.children().length;
if (settings.dotsData && difference !== 0) {
this._controls.$absolute.html(this._templates.join(''));
} else if (difference > 0) {
this._controls.$absolute.append(new Array(difference + 1).join(this._templates[0]));
} else if (difference < 0) {
this._controls.$absolute.children().slice(difference).remove();
}
this._controls.$absolute.find('.active').removeClass('active');
this._controls.$absolute.children().eq($.inArray(this.current(), this._pages)).addClass('active');
}
};
/**
* Extends event data.
* @protected
* @param {Event} event - The event object which gets thrown.
*/
Navigation.prototype.onTrigger = function(event) {
var settings = this._core.settings;
event.page = {
index: $.inArray(this.current(), this._pages),
count: this._pages.length,
size: settings && (settings.center || settings.autoWidth || settings.dotsData
? 1 : settings.dotsEach || settings.items)
};
};
/**
* Gets the current page position of the carousel.
* @protected
* @returns {Number}
*/
Navigation.prototype.current = function() {
var current = this._core.relative(this._core.current());
return $.grep(this._pages, $.proxy(function(page, index) {
return page.start <= current && page.end >= current;
}, this)).pop();
};
/**
* Gets the current succesor/predecessor position.
* @protected
* @returns {Number}
*/
Navigation.prototype.getPosition = function(successor) {
var position, length,
settings = this._core.settings;
if (settings.slideBy == 'page') {
position = $.inArray(this.current(), this._pages);
length = this._pages.length;
successor ? ++position : --position;
position = this._pages[((position % length) + length) % length].start;
} else {
position = this._core.relative(this._core.current());
length = this._core.items().length;
successor ? position += settings.slideBy : position -= settings.slideBy;
}
return position;
};
/**
* Slides to the next item or page.
* @public
* @param {Number} [speed=false] - The time in milliseconds for the transition.
*/
Navigation.prototype.next = function(speed) {
$.proxy(this._overrides.to, this._core)(this.getPosition(true), speed);
};
/**
* Slides to the previous item or page.
* @public
* @param {Number} [speed=false] - The time in milliseconds for the transition.
*/
Navigation.prototype.prev = function(speed) {
$.proxy(this._overrides.to, this._core)(this.getPosition(false), speed);
};
/**
* Slides to the specified item or page.
* @public
* @param {Number} position - The position of the item or page.
* @param {Number} [speed] - The time in milliseconds for the transition.
* @param {Boolean} [standard=false] - Whether to use the standard behaviour or not.
*/
Navigation.prototype.to = function(position, speed, standard) {
var length;
if (!standard && this._pages.length) {
length = this._pages.length;
$.proxy(this._overrides.to, this._core)(this._pages[((position % length) + length) % length].start, speed);
} else {
$.proxy(this._overrides.to, this._core)(position, speed);
}
};
$.fn.owlCarousel.Constructor.Plugins.Navigation = Navigation;
})(window.Zepto || window.jQuery, window, document);