1 files changed, 38 insertions, 11 deletions

diff --git a/indra/newview/llfolderviewmodelinventory.cpp b/indra/newview/llfolderviewmodelinventory.cpp
index d40a7234e2..b6d856e31b 100644
--- a/indra/newview/llfolderviewmodelinventory.cpp
+++ b/indra/newview/llfolderviewmodelinventory.cpp
@@ -66,7 +66,7 @@ void LLFolderViewModelInventory::sort( LLFolderViewFolder* folder )
 {
 	LL_RECORD_BLOCK_TIME(FTM_INVENTORY_SORT);
 
-	if (!needsSort(folder->getViewModelItem())) return;
+	if (!folder->areChildrenInited() || !needsSort(folder->getViewModelItem())) return;
 
 	LLFolderViewModelItemInventory* modelp =   static_cast<LLFolderViewModelItemInventory*>(folder->getViewModelItem());
 	if (modelp->getUUID().isNull()) return;
@@ -132,6 +132,16 @@ bool LLFolderViewModelInventory::isFolderComplete(LLFolderViewFolder* folder)
 	return false;
 }
 
+//virtual
+void LLFolderViewModelItemInventory::addChild(LLFolderViewModelItem* child)
+{
+    LLFolderViewModelItemInventory* model_child = static_cast<LLFolderViewModelItemInventory*>(child);
+    mLastAddedChildCreationDate = model_child->getCreationDate();
+
+    // this will requestSort()
+    LLFolderViewModelItemCommon::addChild(child);
+}
+
 void LLFolderViewModelItemInventory::requestSort()
 {
 	LLFolderViewModelItemCommon::requestSort();
@@ -140,15 +150,31 @@ void LLFolderViewModelItemInventory::requestSort()
 	{
 		folderp->requestArrange();
 	}
-	if (static_cast<LLFolderViewModelInventory&>(mRootViewModel).getSorter().isByDate())
-	{
-		// sort by date potentially affects parent folders which use a date
-		// derived from newest item in them
-		if (mParent)
-		{
-			mParent->requestSort();
-		}
-	}
+    LLInventorySort sorter = static_cast<LLFolderViewModelInventory&>(mRootViewModel).getSorter();
+
+    // Sort by date potentially affects parent folders which use a date
+    // derived from newest item in them
+    if (sorter.isByDate() && mParent)
+    {
+        // If this is an item, parent needs to be resorted
+        // This case shouldn't happen, unless someone calls item->requestSort()
+        if (!folderp)
+        {
+            mParent->requestSort();
+        }
+        // if this is a folder, check sort rules for folder first
+        else if (sorter.isFoldersByDate())
+        {
+            if (mLastAddedChildCreationDate == -1  // nothing was added, some other reason for resort
+                || mLastAddedChildCreationDate > getCreationDate()) // newer child
+            {
+                LLFolderViewModelItemInventory* model_parent = static_cast<LLFolderViewModelItemInventory*>(mParent);
+                model_parent->mLastAddedChildCreationDate = mLastAddedChildCreationDate;
+                mParent->requestSort();
+            }
+        }
+    }
+    mLastAddedChildCreationDate = -1;
 }
 
 void LLFolderViewModelItemInventory::setPassedFilter(bool passed, S32 filter_generation, std::string::size_type string_offset, std::string::size_type string_size)
@@ -387,6 +413,7 @@ bool LLInventorySort::operator()(const LLFolderViewModelItemInventory* const& a,
 
 LLFolderViewModelItemInventory::LLFolderViewModelItemInventory( class LLFolderViewModelInventory& root_view_model ) :
     LLFolderViewModelItemCommon(root_view_model),
-    mPrevPassedAllFilters(false)
+    mPrevPassedAllFilters(false),
+    mLastAddedChildCreationDate(-1)
 {
 }