Add jQuery.ScrollTo

1 files changed, 225 insertions, 0 deletions

diff --git a/vendor/assets/javascripts/jquery.scrollto.js b/vendor/assets/javascripts/jquery.scrollto.js
new file mode 100644
index 00000000000..7f10b7f1082
--- /dev/null
+++ b/vendor/assets/javascripts/jquery.scrollto.js
@@ -0,0 +1,225 @@
+/**
+ * @depends jquery
+ * @name jquery.scrollto
+ * @package jquery-scrollto {@link http://balupton.com/projects/jquery-scrollto}
+ */
+
+/**
+ * jQuery Aliaser
+ */
+(function(window,undefined){
+	// Prepare
+	var jQuery, $, ScrollTo;
+	jQuery = $ = window.jQuery;
+
+	/**
+	 * jQuery ScrollTo (balupton edition)
+	 * @version 1.2.0
+	 * @date July 9, 2012
+	 * @since 0.1.0, August 27, 2010
+	 * @package jquery-scrollto {@link http://balupton.com/projects/jquery-scrollto}
+	 * @author Benjamin "balupton" Lupton {@link http://balupton.com}
+	 * @copyright (c) 2010 Benjamin Arthur Lupton {@link http://balupton.com}
+	 * @license MIT License {@link http://creativecommons.org/licenses/MIT/}
+	 */
+	ScrollTo = $.ScrollTo = $.ScrollTo || {
+		/**
+		 * The Default Configuration
+		 */
+		config: {
+			duration: 400,
+			easing: 'swing',
+			callback: undefined,
+			durationMode: 'each',
+			offsetTop: 0,
+			offsetLeft: 0
+		},
+
+		/**
+		 * Configure ScrollTo
+		 */
+		configure: function(options){
+			// Apply Options to Config
+			$.extend(ScrollTo.config, options||{});
+
+			// Chain
+			return this;
+		},
+
+		/**
+		 * Perform the Scroll Animation for the Collections
+		 * We use $inline here, so we can determine the actual offset start for each overflow:scroll item
+		 * Each collection is for each overflow:scroll item
+		 */
+		scroll: function(collections, config){
+			// Prepare
+			var collection, $container, container, $target, $inline, position,
+				containerScrollTop, containerScrollLeft,
+				containerScrollTopEnd, containerScrollLeftEnd,
+				startOffsetTop, targetOffsetTop, targetOffsetTopAdjusted,
+				startOffsetLeft, targetOffsetLeft, targetOffsetLeftAdjusted,
+				scrollOptions,
+				callback;
+
+			// Determine the Scroll
+			collection = collections.pop();
+			$container = collection.$container;
+			container = $container.get(0);
+			$target = collection.$target;
+
+			// Prepare the Inline Element of the Container
+			$inline = $('<span/>').css({
+				'position': 'absolute',
+				'top': '0px',
+				'left': '0px'
+			});
+			position = $container.css('position');
+
+			// Insert the Inline Element of the Container
+			$container.css('position','relative');
+			$inline.appendTo($container);
+
+			// Determine the top offset
+			startOffsetTop = $inline.offset().top;
+			targetOffsetTop = $target.offset().top;
+			targetOffsetTopAdjusted = targetOffsetTop - startOffsetTop - parseInt(config.offsetTop,10);
+
+			// Determine the left offset
+			startOffsetLeft = $inline.offset().left;
+			targetOffsetLeft = $target.offset().left;
+			targetOffsetLeftAdjusted = targetOffsetLeft - startOffsetLeft - parseInt(config.offsetLeft,10);
+
+			// Determine current scroll positions
+			containerScrollTop = container.scrollTop;
+			containerScrollLeft = container.scrollLeft;
+
+			// Reset the Inline Element of the Container
+			$inline.remove();
+			$container.css('position',position);
+
+			// Prepare the scroll options
+			scrollOptions = {};
+
+			// Prepare the callback
+			callback = function(event){
+				// Check
+				if ( collections.length === 0 ) {
+					// Callback
+					if ( typeof config.callback === 'function' ) {
+						config.callback.apply(this,[event]);
+					}
+				}
+				else {
+					// Recurse
+					ScrollTo.scroll(collections,config);
+				}
+				// Return true
+				return true;
+			};
+
+			// Handle if we only want to scroll if we are outside the viewport
+			if ( config.onlyIfOutside ) {
+				// Determine current scroll positions
+				containerScrollTopEnd = containerScrollTop + $container.height();
+				containerScrollLeftEnd = containerScrollLeft + $container.width();
+
+				// Check if we are in the range of the visible area of the container
+				if ( containerScrollTop < targetOffsetTopAdjusted && targetOffsetTopAdjusted < containerScrollTopEnd ) {
+					targetOffsetTopAdjusted = containerScrollTop;
+				}
+				if ( containerScrollLeft < targetOffsetLeftAdjusted && targetOffsetLeftAdjusted < containerScrollLeftEnd ) {
+					targetOffsetLeftAdjusted = containerScrollLeft;
+				}
+			}
+
+			// Determine the scroll options
+			if ( targetOffsetTopAdjusted !== containerScrollTop ) {
+				scrollOptions.scrollTop = targetOffsetTopAdjusted;
+			}
+			if ( targetOffsetLeftAdjusted !== containerScrollLeft ) {
+				scrollOptions.scrollLeft = targetOffsetLeftAdjusted;
+			}
+
+			// Perform the scroll
+			if ( $.browser.safari && container === document.body ) {
+				window.scrollTo(scrollOptions.scrollLeft, scrollOptions.scrollTop);
+				callback();
+			}
+			else if ( scrollOptions.scrollTop || scrollOptions.scrollLeft ) {
+				$container.animate(scrollOptions, config.duration, config.easing, callback);
+			}
+			else {
+				callback();
+			}
+
+			// Return true
+			return true;
+		},
+
+		/**
+		 * ScrollTo the Element using the Options
+		 */
+		fn: function(options){
+			// Prepare
+			var collections, config, $container, container;
+			collections = [];
+
+			// Prepare
+			var	$target = $(this);
+			if ( $target.length === 0 ) {
+				// Chain
+				return this;
+			}
+
+			// Handle Options
+			config = $.extend({},ScrollTo.config,options);
+
+			// Fetch
+			$container = $target.parent();
+			container = $container.get(0);
+
+			// Cycle through the containers
+			while ( ($container.length === 1) && (container !== document.body) && (container !== document) ) {
+				// Check Container for scroll differences
+				var scrollTop, scrollLeft;
+				scrollTop = $container.css('overflow-y') !== 'visible' && container.scrollHeight !== container.clientHeight;
+				scrollLeft =  $container.css('overflow-x') !== 'visible' && container.scrollWidth !== container.clientWidth;
+				if ( scrollTop || scrollLeft ) {
+					// Push the Collection
+					collections.push({
+						'$container': $container,
+						'$target': $target
+					});
+					// Update the Target
+					$target = $container;
+				}
+				// Update the Container
+				$container = $container.parent();
+				container = $container.get(0);
+			}
+
+			// Add the final collection
+			collections.push({
+				'$container': $(
+					($.browser.msie || $.browser.mozilla) ? 'html' : 'body'
+				),
+				'$target': $target
+			});
+
+			// Adjust the Config
+			if ( config.durationMode === 'all' ) {
+				config.duration /= collections.length;
+			}
+
+			// Handle
+			ScrollTo.scroll(collections,config);
+
+			// Chain
+			return this;
+		}
+	};
+
+	// Apply our jQuery Prototype Function
+	$.fn.ScrollTo = $.ScrollTo.fn;
+
+})(window);