Merge tag '7.53' into drupal-7.53

7.53 release

* tag '7.53':
  Drupal 7.53
  Issue #2821441 by davic, droplet, David_Rothstein, Joe Keene, Fabianx, tory-w: Fixed that newer Chrome versions cannot drag and drop anymore on desktop after 7.51 update when jQuery is updated to 1.7-1.11.0

CHANGELOG.txt

@@ -1,4 +1,9 @@
 
+Drupal 7.53, 2016-12-07
+-----------------------
+- Fixed drag and drop support on newer Chrome/IE 11+ versions after 7.51 update
+  when jQuery is updated to 1.7-1.11.0.
+
 Drupal 7.52, 2016-11-16
 -----------------------
 - Fixed security issues (multiple vulnerabilities). See SA-CORE-2016-005.

includes/bootstrap.inc

@@ -8,7 +8,7 @@
 /**
  * The current system version.
  */
-define('VERSION', '7.52');
+define('VERSION', '7.53');
 
 /**
  * Core API compatibility.

misc/tabledrag.js

@@ -580,12 +580,20 @@ Drupal.tableDrag.prototype.dropRow = function (event, self) {
  * Get the mouse coordinates from the event (allowing for browser differences).
  */
 Drupal.tableDrag.prototype.mouseCoords = function (event) {
+  // Complete support for pointer events was only introduced to jQuery in
+  // version 1.11.1; between versions 1.7 and 1.11.0 pointer events have the
+  // clientX and clientY properties undefined. In those cases, the properties
+  // must be retrieved from the event.originalEvent object instead.
+  var clientX = event.clientX || event.originalEvent.clientX;
+  var clientY = event.clientY || event.originalEvent.clientY;
+
   if (event.pageX || event.pageY) {
     return { x: event.pageX, y: event.pageY };
   }
+
   return {
-    x: event.clientX + document.body.scrollLeft - document.body.clientLeft,
-    y: event.clientY + document.body.scrollTop  - document.body.clientTop
+    x: clientX + document.body.scrollLeft - document.body.clientLeft,
+    y: clientY + document.body.scrollTop  - document.body.clientTop
   };
 };