2 files changed, 50 insertions, 1 deletions

diff --git a/indra/llui/llflatlistview.cpp b/indra/llui/llflatlistview.cpp
index 2433c14315..f22b49f30f 100644
--- a/indra/llui/llflatlistview.cpp
+++ b/indra/llui/llflatlistview.cpp
@@ -50,14 +50,21 @@ LLFlatListView::Params::Params()
 	allow_select("allow_select"),
 	multi_select("multi_select"),
 	keep_one_selected("keep_one_selected"),
+	keep_selection_visible_on_reshape("keep_selection_visible_on_reshape",false),
 	no_items_text("no_items_text")
 {};
 
 void LLFlatListView::reshape(S32 width, S32 height, BOOL called_from_parent /* = TRUE */)
 {
+	S32 delta = height - getRect().getHeight();
 	LLScrollContainer::reshape(width, height, called_from_parent);
 	setItemsNoScrollWidth(width);
 	rearrangeItems();
+	
+	if(delta!= 0 && mKeepSelectionVisibleOnReshape)
+	{
+		ensureSelectedVisible();
+	}
 }
 
 const LLRect& LLFlatListView::getItemsRect() const
@@ -380,6 +387,7 @@ LLFlatListView::LLFlatListView(const LLFlatListView::Params& p)
   , mPrevNotifyParentRect(LLRect())
   , mNoItemsCommentTextbox(NULL)
   , mIsConsecutiveSelection(false)
+  , mKeepSelectionVisibleOnReshape(p.keep_selection_visible_on_reshape)
 {
 	mBorderThickness = getBorderWidth();
 
@@ -1218,6 +1226,8 @@ LLFlatListViewEx::LLFlatListViewEx(const Params& p)
 :	LLFlatListView(p)
 , mNoFilteredItemsMsg(p.no_filtered_items_msg)
 , mNoItemsMsg(p.no_items_msg)
+, mForceShowingUnmatchedItems(false)
+, mLastFilterSucceded(false)
 {
 
 }
@@ -1242,6 +1252,16 @@ void LLFlatListViewEx::updateNoItemsMessage(const std::string& filter_string)
 
 }
 
+bool LLFlatListViewEx::getForceShowingUnmatchedItems()
+{
+	return mForceShowingUnmatchedItems;
+}
+
+void LLFlatListViewEx::setForceShowingUnmatchedItems(bool show)
+{
+	mForceShowingUnmatchedItems = show;
+}
+
 void LLFlatListViewEx::setFilterSubString(const std::string& filter_str)
 {
 	if (0 != LLStringUtil::compareInsensitive(filter_str, mFilterSubString))
@@ -1265,6 +1285,7 @@ void LLFlatListViewEx::filterItems()
 	item_panel_list_t items;
 	getItems(items);
 
+	mLastFilterSucceded = false;
 	for (item_panel_list_t::iterator
 			 iter = items.begin(),
 			 iter_end = items.end();
@@ -1275,13 +1296,14 @@ void LLFlatListViewEx::filterItems()
 		// i.e. we don't hide items that don't support 'match_filter' action, separators etc.
 		if (0 == pItem->notify(action))
 		{
+			mLastFilterSucceded = true;
 			pItem->setVisible(true);
 		}
 		else
 		{
 			// TODO: implement (re)storing of current selection.
 			selectItem(pItem, false);
-			pItem->setVisible(false);
+			pItem->setVisible(mForceShowingUnmatchedItems);
 		}
 	}
 
@@ -1289,4 +1311,9 @@ void LLFlatListViewEx::filterItems()
 	notifyParentItemsRectChanged();
 }
 
+bool LLFlatListViewEx::wasLasFilterSuccessfull()
+{
+	return mLastFilterSucceded;
+}
+
 //EOF
diff --git a/indra/llui/llflatlistview.h b/indra/llui/llflatlistview.h
index f4e0426f15..caeddfc179 100644
--- a/indra/llui/llflatlistview.h
+++ b/indra/llui/llflatlistview.h
@@ -105,6 +105,9 @@ public:
 		/** don't allow to deselect all selected items (for mouse events on items only) */
 		Optional<bool> keep_one_selected;
 
+		/** try to keep selection visible after reshape */
+		Optional<bool> keep_selection_visible_on_reshape;
+
 		/** padding between items */
 		Optional<U32> item_pad; 
 
@@ -412,6 +415,8 @@ private:
 
 	bool mIsConsecutiveSelection;
 
+	bool mKeepSelectionVisibleOnReshape;
+
 	/** All pairs of the list */
 	pairs_list_t mItemPairs;
 
@@ -465,6 +470,10 @@ public:
 	void setNoItemsMsg(const std::string& msg) { mNoItemsMsg = msg; }
 	void setNoFilteredItemsMsg(const std::string& msg) { mNoFilteredItemsMsg = msg; }
 
+	bool getForceShowingUnmatchedItems();
+
+	void setForceShowingUnmatchedItems(bool show);
+
 	/**
 	 * Sets up new filter string and filters the list.
 	 */
@@ -476,6 +485,11 @@ public:
 	 */
 	void filterItems();
 
+	/**
+	 * Returns true if last call of filterItems() found at least one matching item
+	 */
+	bool wasLasFilterSuccessfull();
+
 protected:
 	LLFlatListViewEx(const Params& p);
 
@@ -491,6 +505,14 @@ private:
 	std::string mNoFilteredItemsMsg;
 	std::string mNoItemsMsg;
 	std::string	mFilterSubString;
+	/**
+	 * Show list items that don't match current filter
+	 */
+	bool mForceShowingUnmatchedItems;
+	/**
+	 * True if last call of filterItems() found at least one matching item
+	 */
+	bool mLastFilterSucceded;
 };
 
 #endif