From f84920f40a4f00efef51ae5b971591500a8116da Mon Sep 17 00:00:00 2001
From: Marcel Werk <burntime@woltlab.com>
Date: Tue, 9 Aug 2011 17:17:22 +0200
Subject: [PATCH] Smooth scroll effect added

---
 .../install/files/acp/templates/header.tpl    |  1 +
 wcfsetup/install/files/js/WCF.js              | 33 +++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/wcfsetup/install/files/acp/templates/header.tpl b/wcfsetup/install/files/acp/templates/header.tpl
index 51a4f910c0..287040f57c 100644
--- a/wcfsetup/install/files/acp/templates/header.tpl
+++ b/wcfsetup/install/files/acp/templates/header.tpl
@@ -68,6 +68,7 @@
 				'wcf.global.page.previous': '{capture assign=pagePrevious}{lang}wcf.global.page.previous{/lang}{/capture}{@$pagePrevious|encodeJS}'
 			});
 			new WCF.Date.Time();
+			new WCF.Effect.SmoothScroll();
 		});
 		//]]>
 	</script>
diff --git a/wcfsetup/install/files/js/WCF.js b/wcfsetup/install/files/js/WCF.js
index 7f1cb28805..fae2ff0475 100644
--- a/wcfsetup/install/files/js/WCF.js
+++ b/wcfsetup/install/files/js/WCF.js
@@ -1540,6 +1540,39 @@ WCF.User = {
 	}
 };
 
+/**
+ * Namespace for effect-related functions.
+ */
+WCF.Effect = {};
+
+/**
+ * Creates a smooth scroll effect.
+ */
+WCF.Effect.SmoothScroll = function() { this.init(); };
+WCF.Effect.SmoothScroll.prototype = {
+	/**
+	 * Initializes effect.
+	 */
+	init: function() {
+		$('a[href=#top],a[href=#bottom]').click(function() {
+			var $target = $(this.hash);
+			if ($target.length) {
+				var $targetOffset = $target.getOffsets().top;
+				if ($targetOffset > $(document).height() - $(window).height()) {
+					$targetOffset = $(document).height() - $(window).height();
+					if ($targetOffset < 0) $targetOffset = 0;
+				}
+				
+				$('html,body').animate({ scrollTop: $targetOffset }, 1200, function (x, t, b, c, d) {
+					return -c * ((t=t/d-1)*t*t*t - 1) + b;
+				});
+				
+				return false;
+			}
+		});
+	}
+};
+
 /**
  * Basic implementation for WCF dialogs.
  */
-- 
2.20.1