single arrows wont go all the way to bottom

public/src/modules/navigator.js

@@ -1,14 +1,15 @@
 
 'use strict';
 
-/* globals app, define, ajaxify, utils, translator */
+/* globals app, define, ajaxify, utils, translator, config */
 
 
-define('navigator', function() {
+define('navigator', ['forum/topic/pagination'], function(pagination) {
 
 	var navigator = {};
 	var index = 1;
 	var count = 0;
+	navigator.scrollActive = false;
 
 	navigator.init = function(selector, count, callback, toTop, toBottom) {
 
@@ -69,7 +70,6 @@ define('navigator', function() {
 	}
 
 	navigator.update = function() {
-
 		toggle(!!count);
 
 		$($(navigator.selector).get().reverse()).each(function() {
@@ -100,13 +100,13 @@ define('navigator', function() {
 
 	navigator.scrollUp = function () {
 		$('body,html').animate({
-			scrollTop: 0
+			scrollTop: $('body').scrollTop() - $(window).height()
 		});
 	};
 
 	navigator.scrollDown = function () {
 		$('body,html').animate({
-			scrollTop: $('html').height() - 100
+			scrollTop: $('body').scrollTop() + $(window).height()
 		});
 	};
 
@@ -136,5 +136,72 @@ define('navigator', function() {
 		return (elTop >= scrollTop && elBottom <= scrollBottom) || (elTop <= scrollTop && elBottom >= scrollTop);
 	}
 
+	navigator.scrollToPost = function(postIndex, highlight, duration, offset) {
+		if (!utils.isNumber(postIndex)) {
+			return;
+		}
+
+		offset = offset || 0;
+		duration = duration !== undefined ? duration : 400;
+		navigator.scrollActive = true;
+
+		if($('#post_anchor_' + postIndex).length) {
+			return scrollToPid(postIndex, highlight, duration, offset);
+		}
+
+		if(config.usePagination) {
+			if (window.location.search.indexOf('page') !== -1) {
+				navigator.update();
+				return;
+			}
+
+			var page = Math.ceil((postIndex + 1) / config.postsPerPage);
+
+			if(parseInt(page, 10) !== pagination.currentPage) {
+				pagination.loadPage(page, function() {
+					scrollToPid(postIndex, highlight, duration, offset);
+				});
+			} else {
+				scrollToPid(postIndex, highlight, duration, offset);
+			}
+		}
+	};
+
+	function scrollToPid(postIndex, highlight, duration, offset) {
+		var scrollTo = $('#post_anchor_' + postIndex);
+
+		var done = false;
+		function animateScroll() {
+			$('html, body').animate({
+				scrollTop: (scrollTo.offset().top - $('#header-menu').height() - offset) + 'px'
+			}, duration, function() {
+				if (done) {
+					return;
+				}
+				done = true;
+
+				navigator.scrollActive = false;
+				navigator.update();
+				highlightPost();
+				$('body').scrollTop($('body').scrollTop() - 1);
+				$('html').scrollTop($('html').scrollTop() - 1);
+			});
+		}
+
+		function highlightPost() {
+			if (highlight) {
+				scrollTo.parent().find('.topic-item').addClass('highlight');
+				setTimeout(function() {
+					scrollTo.parent().find('.topic-item').removeClass('highlight');
+				}, 5000);
+			}
+		}
+
+		if ($('#post-container').length && scrollTo.length) {
+			animateScroll();
+		}
+	}
+
+
 	return navigator;
 });