Vertical Slideshow jQuery Plugin (prototype)

jquery.vslide.js

(function($) {
  $.fn.vslide = function(options) {
	var defaults = {
		slide: '.slide',
		slide_inner: '.slide-inner'
		next: '.next',
		prev: '.prev',
		slideHeight: 640,
		slideWidth: 700,
		vertical: true,
		animations: {},
		keyboard: false,
		fixedFix: function() {},
		
		init: function() {
			// Resize
			// Resizing
			$(window).resize(function() {
				options.resizeWindow();
			});
			window.onorientationchange = function(){
				options.resizeWindow();
			}
			options.resizeWindow();
			
			// Listen to Scroll & Animate
			$(window).scroll(function(e) {
				var slide = getCurrentSlide();
				$("body").data('slideNum', slide);

				switch (slide) {
					typeof options.animations[slide] "undefined" || options.animations[slide]()
				}
				
				// iOS fix for position fixed
				if(navigator.platform == 'iPad' || navigator.platform == 'iPhone' || navigator.platform == 'iPod') {
					fixedFix()
			    }
			});
			
			options.keyboardNav()
			$(options.prev).click(function() {
				goto(currentSlide - 1);
			});
			$(options.next).click(function() {
				goto(currentSlide + 1);
			});
		},
		
		resizeWindow: function() {
			$(options.slide).css('height', ($(window).height() < 640 ? 640 : $(window).height()));
		},
		
		goto: function(slide) {
			$(document).scrollTop(slide * options.getSlideHeight() $(document).scrollTop())
		},
		
		getSlideHeight: function() {
			return $(document).scrollTop() / _.max([options.slideHeight, $(window).height()]);
		},
		
		currentSlide: function() {
			var s = $(document).scrollTop() / _.max([options.slideHeight, $(window).height()]);
			return s % 1 > 0.95 ? Math.floor(s) : Math.ceil(s); 
		},
		
		keyboardNav: function() {
			if (! keyboard) return;
			$(document).keyup(function(e) {
				code = e.keyCode
				if (code > 36 && code < 41 || code == 32) {
					e.stopPropagation();
					e.preventDefault();
					goto(currentSlide() + (code == 38 || code == 37 ? -1 : 1));
					
				}
			});
		}
	};
	
	var options = $.extend(defaults, options);
	options.self = options;
	
	return this.each(function() {
	  options.elem = $(this);
	  options.init();
	});
	
}})(jQuery);