[OpenLayers-Commits] r11706 - trunk/openlayers/lib/OpenLayers

[commits-20090109 at openlayers.org]

Author: ahocevar
Date: 2011-03-15 19:52:43 -0700 (Tue, 15 Mar 2011)
New Revision: 11706

Modified:
   trunk/openlayers/lib/OpenLayers/Events.js
Log:
fixing scroll position issue on the IPhone by only clearing the mouse cache conditionally. r=erilem (closes #3132)

Modified: trunk/openlayers/lib/OpenLayers/Events.js
===================================================================
--- trunk/openlayers/lib/OpenLayers/Events.js	2011-03-14 21:05:59 UTC (rev 11705)
+++ trunk/openlayers/lib/OpenLayers/Events.js	2011-03-16 02:52:43 UTC (rev 11706)
@@ -854,7 +854,18 @@
     clearMouseCache: function() { 
         this.element.scrolls = null;
         this.element.lefttop = null;
-        this.element.offsets = null;
+        // OpenLayers.Util.pagePosition needs to use
+        // element.getBoundingClientRect to correctly calculate the offsets
+        // for the iPhone, but once the page is scrolled, getBoundingClientRect
+        // returns incorrect offsets. So our best bet is to not invalidate the
+        // offsets once we have them, and hope that the page was not scrolled
+        // when we did the initial calculation.
+        if (!((document.body.scrollTop != 0 ||
+                                document.body.scrollLeft != 0) &&
+                                navigator.userAgent.match(/iPhone/i))) {
+            OpenLayers.Console.log("clear");
+            this.element.offsets = null;
+        }
     },      
 
     /**