use supplied date range rather than precalculated dates

calendar/modules/core/inc/nsLayer.h

@@ -54,8 +54,8 @@ public:
   NS_IMETHOD GetCal(NSCalendar*& aCal);
   NS_IMETHOD SetShell(nsCalendarShell* aShell) {mpShell = aShell; return NS_OK;}
   NS_IMETHOD FetchEventsByRange(
-                      const DateTime* aStart, 
-                      const DateTime* aStop,
+                      DateTime* aStart, 
+                      DateTime* aStop,
                       JulianPtrArray* anArray
                       );
 private:

calendar/modules/core/inc/nsLayerCollection.h

@@ -56,8 +56,8 @@ public:
   NS_IMETHOD SetCal(NSCalendar* aCal);
   NS_IMETHOD GetCal(NSCalendar*& aCal);
   NS_IMETHOD FetchEventsByRange(
-                      const DateTime* aStart, 
-                      const DateTime* aStop, JulianPtrArray* aL
+                      DateTime* aStart, 
+                      DateTime* aStop, JulianPtrArray* aL
                       );
 private:
   nsIVector * mLayers ;

calendar/modules/core/public/nsILayer.h

@@ -71,8 +71,8 @@ public:
   NS_IMETHOD SetCal(NSCalendar* aCal) = 0;
   NS_IMETHOD GetCal(NSCalendar*& aCal) = 0;
   NS_IMETHOD FetchEventsByRange(
-                      const DateTime* aStart, 
-                      const DateTime* aStop,
+                      DateTime* aStart, 
+                      DateTime* aStop,
                       JulianPtrArray* anArray
                       ) = 0;
 };

calendar/modules/core/src/nsLayer.cpp

@@ -211,8 +211,8 @@ static int giViewPropListCount = 10;
  * @return NS_OK on success.
  */
 nsresult nsLayer::FetchEventsByRange(
-                      const DateTime* aStart, 
-                      const DateTime* aStop,
+                      DateTime* aStart, 
+                      DateTime* aStop,
                       JulianPtrArray* anArray
                       )
 {
@@ -258,11 +258,16 @@ nsresult nsLayer::FetchEventsByRange(
   /*
    * Set up the range of time for which we'll pull events...
    */
+#if 0
   int iOffset = 30;
   d.prevDay(iOffset);
   psDTStart = d.toISO8601().toCString("");
   d.nextDay(2 * iOffset);
   psDTEnd = d.toISO8601().toCString("");
+#endif
+
+  psDTStart = aStart->toISO8601().toCString("");
+  psDTEnd = aStop->toISO8601().toCString("");
 
   /*
    * The data is actually read and parsed in another thread. Set it all

calendar/modules/core/src/nsLayerCollection.cpp

@@ -148,8 +148,8 @@ nsresult nsLayerCollection::GetCal(NSCalendar*& aCal)
  * @return NS_OK on success
  */
 nsresult nsLayerCollection::FetchEventsByRange(
-                      const DateTime*  aStart, 
-                      const DateTime*  aStop,
+                      DateTime*  aStart, 
+                      DateTime*  aStop,
                       JulianPtrArray*  anArray
                       )
 {