From 89473f6557662d905a63faa3ae3520bf3715a7e8 Mon Sep 17 00:00:00 2001
From: John Chen <zhang.z.chen@intel.com>
Date: Sat, 16 Feb 2013 21:32:55 +0800
Subject: [PATCH] Sortable: Skip items that are not at the same line as the
 cursor when floating. Fixes #8792: Issue with floated items in connected
 lists.

---
 ui/jquery.ui.sortable.js | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/ui/jquery.ui.sortable.js b/ui/jquery.ui.sortable.js
index 93c6cccc5fb..22acff7d116 100644
--- a/ui/jquery.ui.sortable.js
+++ b/ui/jquery.ui.sortable.js
@@ -21,6 +21,10 @@ function isOverAxis( x, reference, size ) {
 	return ( x > reference ) && ( x < ( reference + size ) );
 }
 
+function isFloating(item) {
+	return (/left|right/).test(item.css("float")) || (/inline|table-cell/).test(item.css("display"));
+}
+
 $.widget("ui.sortable", $.ui.mouse, {
 	version: "@VERSION",
 	widgetEventPrefix: "sort",
@@ -73,7 +77,7 @@ $.widget("ui.sortable", $.ui.mouse, {
 		this.refresh();
 
 		//Let's determine if the items are being displayed horizontally
-		this.floating = this.items.length ? o.axis === "x" || (/left|right/).test(this.items[0].item.css("float")) || (/inline|table-cell/).test(this.items[0].item.css("display")) : false;
+		this.floating = this.items.length ? o.axis === "x" || isFloating(this.items[0].item) : false;
 
 		//Let's determine the parent's offset
 		this.offset = this.element.offset();
@@ -799,7 +803,7 @@ $.widget("ui.sortable", $.ui.mouse, {
 	},
 
 	_contactContainers: function(event) {
-		var i, j, dist, itemWithLeastDistance, posProperty, sizeProperty, base, cur, nearBottom,
+		var i, j, dist, itemWithLeastDistance, posProperty, sizeProperty, base, cur, nearBottom, floating,
 			innermostContainer = null,
 			innermostIndex = null;
 
@@ -845,8 +849,9 @@ $.widget("ui.sortable", $.ui.mouse, {
 			//When entering a new container, we will find the item with the least distance and append our item near it
 			dist = 10000;
 			itemWithLeastDistance = null;
-			posProperty = this.containers[innermostIndex].floating ? "left" : "top";
-			sizeProperty = this.containers[innermostIndex].floating ? "width" : "height";
+			floating = innermostContainer.floating || isFloating(this.currentItem);
+			posProperty = floating ? "left" : "top";
+			sizeProperty = floating ? "width" : "height";
 			base = this.positionAbs[posProperty] + this.offset.click[posProperty];
 			for (j = this.items.length - 1; j >= 0; j--) {
 				if(!$.contains(this.containers[innermostIndex].element[0], this.items[j].item[0])) {
@@ -855,6 +860,9 @@ $.widget("ui.sortable", $.ui.mouse, {
 				if(this.items[j].item[0] === this.currentItem[0]) {
 					continue;
 				}
+				if (floating && !isOverAxis(this.positionAbs.top + this.offset.click.top, this.items[j].top, this.items[j].height)) {
+					continue;
+				}
 				cur = this.items[j].item.offset()[posProperty];
 				nearBottom = false;
 				if(Math.abs(cur - base) > Math.abs(cur + this.items[j][sizeProperty] - base)){
@@ -873,10 +881,14 @@ $.widget("ui.sortable", $.ui.mouse, {
 				return;
 			}
 
-			this.currentContainer = this.containers[innermostIndex];
+			if(this.currentContainer === this.containers[innermostIndex]) {
+				return;
+			}
+
 			itemWithLeastDistance ? this._rearrange(event, itemWithLeastDistance, null, true) : this._rearrange(event, null, this.containers[innermostIndex].element, true);
 			this._trigger("change", event, this._uiHash());
 			this.containers[innermostIndex]._trigger("change", event, this._uiHash(this));
+			this.currentContainer = this.containers[innermostIndex];
 
 			//Update the placeholder
 			this.options.placeholder.update(this.currentContainer, this.placeholder);