Merge branch 'main' into DRTVWR-591-maint-X

# Conflicts:
#	indra/newview/app_settings/settings.xml
#	indra/newview/llinventorybridge.cpp
#	indra/newview/lltexturectrl.h
#	indra/newview/llvovolume.cpp

24 files changed, 395 insertions, 96 deletions

diff --git a/indra/llui/llbutton.cpp b/indra/llui/llbutton.cpp
index 061c24db50..ceceb90f0a 100644
--- a/indra/llui/llbutton.cpp
+++ b/indra/llui/llbutton.cpp
@@ -204,7 +204,8 @@ LLButton::LLButton(const LLButton::Params& p)
 	}
 
 	// Hack to make sure there is space for at least one character
-	if (getRect().getWidth() - (mRightHPad + mLeftHPad) < mGLFont->getWidth(std::string(" ")))
+	if (getRect().mRight >= 0 && getRect().getWidth() > 0 &&
+		getRect().getWidth() - (mRightHPad + mLeftHPad) < mGLFont->getWidth(std::string(" ")))
 	{
 		// Use old defaults
 		mLeftHPad = llbutton_orig_h_pad;
diff --git a/indra/llui/llfolderview.cpp b/indra/llui/llfolderview.cpp
index ed49c0dcfd..bbbb4afb54 100644
--- a/indra/llui/llfolderview.cpp
+++ b/indra/llui/llfolderview.cpp
@@ -189,7 +189,9 @@ LLFolderView::LLFolderView(const Params& p)
 	mStatusTextBox(NULL),
 	mShowItemLinkOverlays(p.show_item_link_overlays),
 	mViewModel(p.view_model),
-    mGroupedItemModel(p.grouped_item_model)
+    mGroupedItemModel(p.grouped_item_model),
+    mForceArrange(false),
+    mSingleFolderMode(false)
 {
     LLPanel* panel = p.parent_panel;
     mParentPanel = panel->getHandle();
@@ -609,6 +611,7 @@ void LLFolderView::clearSelection()
 	}
 
 	mSelectedItems.clear();
+    mNeedsScroll = false;
 }
 
 std::set<LLFolderViewItem*> LLFolderView::getSelectionList() const
@@ -665,7 +668,7 @@ void LLFolderView::draw()
 	}
 	else if (mShowEmptyMessage)
 	{
-		mStatusTextBox->setValue(getFolderViewModel()->getStatusText());
+		mStatusTextBox->setValue(getFolderViewModel()->getStatusText(mItems.empty() && mFolders.empty()));
 		mStatusTextBox->setVisible( TRUE );
 		
 		// firstly reshape message textbox with current size. This is necessary to
@@ -693,12 +696,16 @@ void LLFolderView::draw()
 		}
 	}
 
-	if (mRenameItem && mRenamer && mRenamer->getVisible() && !getVisibleRect().overlaps(mRenamer->getRect()))
-	{
-		// renamer is not connected to the item we are renaming in any form so manage it manually
-		// TODO: consider stopping on any scroll action instead of when out of visible area
-		finishRenamingItem();
-	}
+    if (mRenameItem
+        && mRenamer
+        && mRenamer->getVisible()
+        && !getVisibleRect().overlaps(mRenamer->getRect()))
+    {
+        // renamer is not connected to the item we are renaming in any form so manage it manually
+        // TODO: consider stopping on any scroll action instead of when out of visible area
+        LL_DEBUGS("Inventory") << "Renamer out of bounds, hiding" << LL_ENDL;
+        finishRenamingItem();
+    }
 
 	// skip over LLFolderViewFolder::draw since we don't want the folder icon, label, 
 	// and arrow for the root folder
@@ -832,9 +839,12 @@ void LLFolderView::autoOpenItem( LLFolderViewFolder* item )
 	mAutoOpenItems.push(item);
 	
 	item->setOpen(TRUE);
+    if(!item->isSingleFolderMode())
+    {
 	LLRect content_rect = (mScrollContainer ? mScrollContainer->getContentWindowRect() : LLRect());
 	LLRect constraint_rect(0,content_rect.getHeight(), content_rect.getWidth(), 0);
 	scrollToShowItem(item, constraint_rect);
+    }
 }
 
 void LLFolderView::closeAutoOpenedFolders()
@@ -1038,6 +1048,8 @@ void LLFolderView::paste()
 // public rename functionality - can only start the process
 void LLFolderView::startRenamingSelectedItem( void )
 {
+    LL_DEBUGS("Inventory") << "Starting inventory renamer" << LL_ENDL;
+
 	// make sure selection is visible
 	scrollToShowSelection();
 
@@ -1273,6 +1285,11 @@ BOOL LLFolderView::handleKeyHere( KEY key, MASK mask )
 		if(mSelectedItems.size())
 		{
 			LLFolderViewItem* last_selected = getCurSelectedItem();
+            if(last_selected && last_selected->isSingleFolderMode())
+            {
+                handled = FALSE;
+                break;
+            }
 			LLFolderViewItem* parent_folder = last_selected->getParentFolder();
 			if (!last_selected->isOpen() && parent_folder && parent_folder->getParentFolder())
 			{
@@ -1458,9 +1475,19 @@ BOOL LLFolderView::handleRightMouseDown( S32 x, S32 y, MASK mask )
 			mCallbackRegistrar->popScope();
 		}
 	}
+
+    BOOL item_clicked = FALSE;
+    for (selected_items_t::iterator item_it = mSelectedItems.begin(); item_it != mSelectedItems.end(); ++item_it)
+    {
+        item_clicked |= (*item_it)->getRect().pointInRect(x, y);
+    }
+    if(!item_clicked && mSingleFolderMode)
+    {
+        clearSelection();
+    }
 	bool hide_folder_menu = mSuppressFolderMenu && isFolderSelected();
-	if (menu && (handled
-		&& ( count > 0 && (hasVisibleChildren()) )) && // show menu only if selected items are visible
+	if (menu && (mSingleFolderMode || (handled
+		&& ( count > 0 && (hasVisibleChildren()) ))) && // show menu only if selected items are visible
 		!hide_folder_menu)
 	{
 		if (mCallbackRegistrar)
@@ -1532,6 +1559,22 @@ BOOL LLFolderView::handleHover( S32 x, S32 y, MASK mask )
 	return LLView::handleHover( x, y, mask );
 }
 
+LLFolderViewItem* LLFolderView::getHoveredItem() const
+{
+	return dynamic_cast<LLFolderViewItem*>(mHoveredItem.get());
+}
+
+void LLFolderView::setHoveredItem(LLFolderViewItem* itemp)
+{
+	if (mHoveredItem.get() != itemp)
+	{
+		if (itemp)
+			mHoveredItem = itemp->getHandle();
+		else
+			mHoveredItem.markDead();
+	}
+}
+
 BOOL LLFolderView::handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
 									 EDragAndDropType cargo_type,
 									 void* cargo_data, 
@@ -1716,7 +1759,7 @@ void LLFolderView::update()
 		mNeedsAutoSelect = FALSE;
 	}
 
-  BOOL is_visible = isInVisibleChain();
+  BOOL is_visible = isInVisibleChain() || mForceArrange;
 
   //Puts folders/items in proper positions
   // arrange() takes the model filter flag into account and call sort() if necessary (CHUI-849)
@@ -1817,13 +1860,28 @@ void LLFolderView::update()
         }
 	}
 
-	if (mSignalSelectCallback)
-	{
-		//RN: we use keyboard focus as a proxy for user-explicit actions
-		BOOL take_keyboard_focus = (mSignalSelectCallback == SIGNAL_KEYBOARD_FOCUS);
-		mSelectSignal(mSelectedItems, take_keyboard_focus);
-	}
-	mSignalSelectCallback = FALSE;
+    if (mSelectedItems.size())
+    {
+        LLFolderViewItem* item = mSelectedItems.back();
+        // If the goal is to show renamer, don't callback untill
+        // item is visible or is no longer being scrolled to.
+        // Otherwise renamer will be instantly closed
+        // Todo: consider moving renamer out of selection callback
+        if (!mNeedsAutoRename || !mNeedsScroll || item->getVisible())
+        {
+            if (mSignalSelectCallback)
+            {
+                //RN: we use keyboard focus as a proxy for user-explicit actions
+                BOOL take_keyboard_focus = (mSignalSelectCallback == SIGNAL_KEYBOARD_FOCUS);
+                mSelectSignal(mSelectedItems, take_keyboard_focus);
+            }
+            mSignalSelectCallback = FALSE;
+        }
+    }
+    else
+    {
+        mSignalSelectCallback = FALSE;
+    }
 }
 
 void LLFolderView::dumpSelectionInformation()
@@ -1886,6 +1944,11 @@ void LLFolderView::updateMenuOptions(LLMenuGL* menu)
 		flags = multi_select_flag;
 	}
 
+    if(mSingleFolderMode && (mSelectedItems.size() == 0))
+    {
+        buildContextMenu(*menu, flags);
+    }
+
 	// This adds a check for restrictions based on the entire
 	// selection set - for example, any one wearable may not push you
 	// over the limit, but all wearables together still might.
@@ -2042,7 +2105,7 @@ LLFolderViewItem* LLFolderView::getNextUnselectedItem()
 	return new_selection;
 }
 
-S32 LLFolderView::getItemHeight()
+S32 LLFolderView::getItemHeight() const
 {
 	if(!hasVisibleChildren())
 {
diff --git a/indra/llui/llfolderview.h b/indra/llui/llfolderview.h
index 7dfa04828a..6de366044c 100644
--- a/indra/llui/llfolderview.h
+++ b/indra/llui/llfolderview.h
@@ -127,6 +127,9 @@ public:
 	bool getAllowMultiSelect() { return mAllowMultiSelect; }
 	bool getAllowDrag() { return mAllowDrag; }
 
+    void setSingleFolderMode(bool is_single_mode) { mSingleFolderMode = is_single_mode; }
+    bool isSingleFolderMode() { return mSingleFolderMode; }
+
 	// Close all folders in the view
 	void closeAllFolders();
 	void openTopLevelFolders();
@@ -136,7 +139,7 @@ public:
 	// Find width and height of this object and its children. Also
 	// makes sure that this view and its children are the right size.
 	virtual S32 arrange( S32* width, S32* height );
-	virtual S32 getItemHeight();
+	virtual S32 getItemHeight() const;
 
 	void arrangeAll() { mArrangeGeneration++; }
 	S32 getArrangeGeneration() { return mArrangeGeneration; }
@@ -144,6 +147,10 @@ public:
 	// applies filters to control visibility of items
 	virtual void filter( LLFolderViewFilter& filter);
 
+	void              clearHoveredItem() { setHoveredItem(nullptr); }
+	LLFolderViewItem* getHoveredItem() const;
+	void              setHoveredItem(LLFolderViewItem* itemp);
+
 	// Get the last selected item
 	virtual LLFolderViewItem* getCurSelectedItem( void );
     selected_items_t& getSelectedItems( void );
@@ -237,11 +244,15 @@ public:
 	void setCallbackRegistrar(LLUICtrl::CommitCallbackRegistry::ScopedRegistrar* registrar) { mCallbackRegistrar = registrar; }
 	void setEnableRegistrar(LLUICtrl::EnableCallbackRegistry::ScopedRegistrar* registrar) { mEnableRegistrar = registrar; }
 
+    void setForceArrange(bool force) { mForceArrange = force; }
+
 	LLPanel* getParentPanel() { return mParentPanel.get(); }
 	// DEBUG only
 	void dumpSelectionInformation();
 
 	virtual S32	notify(const LLSD& info) ;
+
+	void setShowEmptyMessage(bool show_msg) { mShowEmptyMessage = show_msg; }
 	
 	bool useLabelSuffix() { return mUseLabelSuffix; }
 	virtual void updateMenu();
@@ -275,6 +286,7 @@ protected:
 	LLHandle<LLView>					mPopupMenuHandle;
 	std::string						mMenuFileName;
 	
+	LLHandle<LLView>				mHoveredItem;
 	selected_items_t				mSelectedItems;
 	bool							mKeyboardSelection,
 									mAllowMultiSelect,
@@ -291,7 +303,8 @@ protected:
 									mShowItemLinkOverlays,
 									mShowSelectionContext,
 									mShowSingleSelection,
-									mSuppressFolderMenu;
+									mSuppressFolderMenu,
+                                    mSingleFolderMode;
 
 	// Renaming variables and methods
 	LLFolderViewItem*				mRenameItem;  // The item currently being renamed
@@ -330,6 +343,8 @@ protected:
 
 	LLUICtrl::CommitCallbackRegistry::ScopedRegistrar* mCallbackRegistrar;
 	LLUICtrl::EnableCallbackRegistry::ScopedRegistrar* mEnableRegistrar;
+
+    bool mForceArrange;
 	
 public:
 	static F32 sAutoOpenTime;
diff --git a/indra/llui/llfolderviewitem.cpp b/indra/llui/llfolderviewitem.cpp
index ed0e705fd5..6ae150dca5 100644
--- a/indra/llui/llfolderviewitem.cpp
+++ b/indra/llui/llfolderviewitem.cpp
@@ -32,6 +32,7 @@
 #include "llfolderview.h"
 #include "llfolderviewmodel.h"
 #include "llpanel.h"
+#include "llcallbacklist.h"
 #include "llcriticaldamp.h"
 #include "llclipboard.h"
 #include "llfocusmgr.h"		// gFocusMgr
@@ -113,6 +114,8 @@ LLFolderViewItem::Params::Params()
     icon_width("icon_width", 0),
     text_pad("text_pad", 0),
     text_pad_right("text_pad_right", 0),
+    single_folder_mode("single_folder_mode", false),
+    double_click_override("double_click_override", false),
     arrow_size("arrow_size", 0),
     max_folder_item_overlap("max_folder_item_overlap", 0)
 { }
@@ -151,7 +154,9 @@ LLFolderViewItem::LLFolderViewItem(const LLFolderViewItem::Params& p)
     mTextPad(p.text_pad),
     mTextPadRight(p.text_pad_right),
     mArrowSize(p.arrow_size),
-    mMaxFolderItemOverlap(p.max_folder_item_overlap)
+    mSingleFolderMode(p.single_folder_mode),
+    mMaxFolderItemOverlap(p.max_folder_item_overlap),
+    mDoubleClickOverride(p.double_click_override)
 {
 	if (!sColorSetInitialized)
 	{
@@ -162,7 +167,7 @@ LLFolderViewItem::LLFolderViewItem(const LLFolderViewItem::Params& p)
 		sMouseOverColor = LLUIColorTable::instance().getColor("InventoryMouseOverColor", DEFAULT_WHITE);
 		sFilterBGColor = LLUIColorTable::instance().getColor("FilterBackgroundColor", DEFAULT_WHITE);
 		sFilterTextColor = LLUIColorTable::instance().getColor("FilterTextColor", DEFAULT_WHITE);
-		sSuffixColor = LLUIColorTable::instance().getColor("InventoryItemColor", DEFAULT_WHITE);
+		sSuffixColor = LLUIColorTable::instance().getColor("InventoryItemLinkColor", DEFAULT_WHITE);
 		sSearchStatusColor = LLUIColorTable::instance().getColor("InventorySearchStatusColor", DEFAULT_WHITE);
 		sColorSetInitialized = true;
 	}
@@ -396,7 +401,7 @@ S32 LLFolderViewItem::arrange( S32* width, S32* height )
             // it is purely visual, so it is fine to do at our laisure
             refreshSuffix();
         }
-		mLabelWidth = getLabelXPos() + getLabelFontForStyle(mLabelStyle)->getWidth(mLabel) + getLabelFontForStyle(mLabelStyle)->getWidth(mLabelSuffix) + mLabelPaddingRight;
+		mLabelWidth = getLabelXPos() + getLabelFontForStyle(mLabelStyle)->getWidth(mLabel) + getLabelFontForStyle(LLFontGL::NORMAL)->getWidth(mLabelSuffix) + mLabelPaddingRight;
 		mLabelWidthDirty = false;
 	}
 
@@ -413,7 +418,7 @@ S32 LLFolderViewItem::arrange( S32* width, S32* height )
 	return *height;
 }
 
-S32 LLFolderViewItem::getItemHeight()
+S32 LLFolderViewItem::getItemHeight() const
 {
 	return mItemHeight;
 }
@@ -623,11 +628,14 @@ BOOL LLFolderViewItem::handleHover( S32 x, S32 y, MASK mask )
 			getWindow()->setCursor(UI_CURSOR_NOLOCKED);
 		}
 
+		root->clearHoveredItem();
 		return TRUE;
 	}
 	else
 	{
-		getRoot()->setShowSelectionContext(FALSE);
+		LLFolderView* pRoot = getRoot();
+		pRoot->setHoveredItem(this);
+		pRoot->setShowSelectionContext(FALSE);
 		getWindow()->setCursor(UI_CURSOR_ARROW);
 		// let parent handle this then...
 		return FALSE;
@@ -682,6 +690,13 @@ BOOL LLFolderViewItem::handleMouseUp( S32 x, S32 y, MASK mask )
 void LLFolderViewItem::onMouseLeave(S32 x, S32 y, MASK mask)
 {
 	mIsMouseOverTitle = false;
+
+	// NOTE: LLViewerWindow::updateUI() calls "enter" before "leave"; if the mouse moved to another item, we can't just outright clear it
+	LLFolderView* pRoot = getRoot();
+	if (this == pRoot->getHoveredItem())
+	{
+		pRoot->clearHoveredItem();
+	}
 }
 
 BOOL LLFolderViewItem::handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
@@ -888,7 +903,10 @@ void LLFolderViewItem::draw()
 
     getViewModelItem()->update();
 
-    drawOpenFolderArrow(default_params, sFgColor);
+    if(!mSingleFolderMode)
+    {
+        drawOpenFolderArrow(default_params, sFgColor);
+    }
 
     drawHighlight(show_context, filled, sHighlightBgColor, sFlashBgColor, sFocusOutlineColor, sMouseOverColor);
 
@@ -924,16 +942,43 @@ void LLFolderViewItem::draw()
 	F32 text_left = (F32)getLabelXPos();
 	std::string combined_string = mLabel + mLabelSuffix;
 
+    const LLFontGL* suffix_font = getLabelFontForStyle(LLFontGL::NORMAL);
+    S32 filter_offset = mViewModelItem->getFilterStringOffset();
 	if (filter_string_length > 0)
 	{
-		S32 left = ll_round(text_left) + font->getWidth(combined_string, 0, mViewModelItem->getFilterStringOffset()) - 2;
+        S32 bottom = llfloor(getRect().getHeight() - font->getLineHeight() - 3 - TOP_PAD);
+        S32 top = getRect().getHeight() - TOP_PAD;
+        if(mLabelSuffix.empty() || (font == suffix_font))
+        {
+        S32 left = ll_round(text_left) + font->getWidth(combined_string, 0, mViewModelItem->getFilterStringOffset()) - 2;
 		S32 right = left + font->getWidth(combined_string, mViewModelItem->getFilterStringOffset(), filter_string_length) + 2;
-		S32 bottom = llfloor(getRect().getHeight() - font->getLineHeight() - 3 - TOP_PAD);
-		S32 top = getRect().getHeight() - TOP_PAD;
 
 		LLUIImage* box_image = default_params.selection_image;
 		LLRect box_rect(left, top, right, bottom);
 		box_image->draw(box_rect, sFilterBGColor);
+        }
+        else
+        {
+            S32 label_filter_length = llmin((S32)mLabel.size() - filter_offset, (S32)filter_string_length);
+            if(label_filter_length > 0)
+            {
+                S32 left = ll_round(text_left) + font->getWidthF32(mLabel, 0, llmin(filter_offset, (S32)mLabel.size())) - 2;
+                S32 right = left + font->getWidthF32(mLabel, filter_offset, label_filter_length) + 2;
+                LLUIImage* box_image = default_params.selection_image;
+                LLRect box_rect(left, top, right, bottom);
+                box_image->draw(box_rect, sFilterBGColor);
+            }
+            S32 suffix_filter_length = label_filter_length > 0 ? filter_string_length - label_filter_length : filter_string_length;
+            if(suffix_filter_length > 0)
+            {
+                S32 suffix_offset = llmax(0, filter_offset - (S32)mLabel.size());
+                S32 left = ll_round(text_left) + font->getWidthF32(mLabel, 0, mLabel.size()) + suffix_font->getWidthF32(mLabelSuffix, 0, suffix_offset) - 2;
+                S32 right = left + suffix_font->getWidthF32(mLabelSuffix, suffix_offset, suffix_filter_length) + 2;
+                LLUIImage* box_image = default_params.selection_image;
+                LLRect box_rect(left, top, right, bottom);
+                box_image->draw(box_rect, sFilterBGColor);
+            }
+        }
     }
 
     LLColor4 color = (mIsSelected && filled) ? mFontHighlightColor : mFontColor;
@@ -950,7 +995,7 @@ void LLFolderViewItem::draw()
 	//
 	if (!mLabelSuffix.empty())
 	{
-		font->renderUTF8( mLabelSuffix, 0, right_x, y, isFadeItem() ? color : (LLColor4)sSuffixColor,
+        suffix_font->renderUTF8( mLabelSuffix, 0, right_x, y, isFadeItem() ? color : (LLColor4)sSuffixColor,
 						  LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, LLFontGL::NO_SHADOW,
 						  S32_MAX, S32_MAX, &right_x, FALSE );
 	}
@@ -960,12 +1005,35 @@ void LLFolderViewItem::draw()
 	//
     if (filter_string_length > 0)
     {
-        S32 filter_offset = mViewModelItem->getFilterStringOffset();
-        F32 match_string_left = text_left + font->getWidthF32(combined_string, 0, filter_offset + filter_string_length) - font->getWidthF32(combined_string, filter_offset, filter_string_length);
-        F32 yy = (F32)getRect().getHeight() - font->getLineHeight() - (F32)mTextPad - (F32)TOP_PAD;
-        font->renderUTF8( combined_string, filter_offset, match_string_left, yy,
+        if(mLabelSuffix.empty() || (font == suffix_font))
+        {
+            F32 match_string_left = text_left + font->getWidthF32(combined_string, 0, filter_offset + filter_string_length) - font->getWidthF32(combined_string, filter_offset, filter_string_length);
+            F32 yy = (F32)getRect().getHeight() - font->getLineHeight() - (F32)mTextPad - (F32)TOP_PAD;
+            font->renderUTF8( combined_string, filter_offset, match_string_left, yy,
             sFilterTextColor, LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, LLFontGL::NO_SHADOW,
             filter_string_length, S32_MAX, &right_x, FALSE );
+        }
+        else
+        {
+            S32 label_filter_length = llmin((S32)mLabel.size() - filter_offset, (S32)filter_string_length);
+            if(label_filter_length > 0)
+            {
+                F32 match_string_left = text_left + font->getWidthF32(mLabel, 0, filter_offset + label_filter_length) - font->getWidthF32(mLabel, filter_offset, label_filter_length);
+                F32 yy = (F32)getRect().getHeight() - font->getLineHeight() - (F32)mTextPad - (F32)TOP_PAD;
+                font->renderUTF8( mLabel, filter_offset, match_string_left, yy,
+ sFilterTextColor, LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, LLFontGL::NO_SHADOW, label_filter_length, S32_MAX, &right_x, FALSE );
+            }
+            
+            S32 suffix_filter_length = label_filter_length > 0 ? filter_string_length - label_filter_length : filter_string_length;
+            if(suffix_filter_length > 0)
+            {
+                S32 suffix_offset = llmax(0, filter_offset - (S32)mLabel.size());
+                F32 match_string_left = text_left + font->getWidthF32(mLabel, 0, mLabel.size()) + suffix_font->getWidthF32(mLabelSuffix, 0, suffix_offset + suffix_filter_length) - suffix_font->getWidthF32(mLabelSuffix, suffix_offset, suffix_filter_length);
+                F32 yy = (F32)getRect().getHeight() - suffix_font->getLineHeight() - (F32)mTextPad - (F32)TOP_PAD;
+                suffix_font->renderUTF8( mLabelSuffix, suffix_offset, match_string_left, yy, sFilterTextColor, LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, LLFontGL::NO_SHADOW, suffix_filter_length, S32_MAX, &right_x, FALSE );
+            }
+        }
+
     }
 
     //Gilbert Linden 9-20-2012: Although this should be legal, removing it because it causes the mLabelSuffix rendering to
@@ -1276,7 +1344,7 @@ BOOL LLFolderViewFolder::setSelection(LLFolderViewItem* selection, BOOL openitem
 			child_selected = TRUE;
 		}
 	}
-	if(openitem && child_selected)
+	if(openitem && child_selected && !mSingleFolderMode)
 	{
 		setOpenArrangeRecursively(TRUE);
 	}
@@ -1701,6 +1769,11 @@ BOOL LLFolderViewFolder::isRemovable()
 	return TRUE;
 }
 
+void LLFolderViewFolder::destroyRoot()
+{
+    delete this;
+}
+
 // this is an internal method used for adding items to folders. 
 void LLFolderViewFolder::addItem(LLFolderViewItem* item)
 {
@@ -1769,7 +1842,19 @@ void LLFolderViewFolder::toggleOpen()
 // Force a folder open or closed
 void LLFolderViewFolder::setOpen(BOOL openitem)
 {
-	setOpenArrangeRecursively(openitem);
+    if(mSingleFolderMode)
+    {
+        // navigateToFolder can destroy this view
+        // delay it in case setOpen was called from click or key processing
+        doOnIdleOneTime([this]()
+                        {
+                            getViewModelItem()->navigateToFolder();
+                        });
+    }
+    else
+    {
+        setOpenArrangeRecursively(openitem);
+    }
 }
 
 void LLFolderViewFolder::setOpenArrangeRecursively(BOOL openitem, ERecurseType recurse)
@@ -1972,7 +2057,8 @@ BOOL LLFolderViewFolder::handleMouseDown( S32 x, S32 y, MASK mask )
 	}
 	if( !handled )
 	{
-		if(mIndentation < x && x < mIndentation + (isCollapsed() ? 0 : mArrowSize) + mTextPad)
+		if((mIndentation < x && x < mIndentation + (isCollapsed() ? 0 : mArrowSize) + mTextPad)
+           && !mSingleFolderMode)
 		{
 			toggleOpen();
 			handled = TRUE;
@@ -1990,12 +2076,45 @@ BOOL LLFolderViewFolder::handleMouseDown( S32 x, S32 y, MASK mask )
 BOOL LLFolderViewFolder::handleDoubleClick( S32 x, S32 y, MASK mask )
 {
 	BOOL handled = FALSE;
+    if(mSingleFolderMode)
+    {
+        static LLUICachedControl<bool> double_click_new_window("SingleModeDoubleClickOpenWindow", false);
+        if (double_click_new_window)
+        {
+            getViewModelItem()->navigateToFolder(true);
+        }
+        else
+        {
+            // navigating is going to destroy views and change children
+            // delay it untill handleDoubleClick processing is complete
+            doOnIdleOneTime([this]()
+                            {
+                                getViewModelItem()->navigateToFolder(false);
+                            });
+        }
+        return TRUE;
+    }
+
 	if( isOpen() )
 	{
 		handled = childrenHandleDoubleClick( x, y, mask ) != NULL;
 	}
 	if( !handled )
 	{
+        if(mDoubleClickOverride)
+        {
+            static LLUICachedControl<U32> double_click_action("MultiModeDoubleClickFolder", false);
+            if (double_click_action == 1)
+            {
+                getViewModelItem()->navigateToFolder(true);
+                return TRUE;
+            }
+            if (double_click_action == 2)
+            {
+                getViewModelItem()->navigateToFolder(false, true);
+                return TRUE;
+            }
+        }
 		if(mIndentation < x && x < mIndentation + (isCollapsed() ? 0 : mArrowSize) + mTextPad)
 		{
 			// don't select when user double-clicks plus sign
diff --git a/indra/llui/llfolderviewitem.h b/indra/llui/llfolderviewitem.h
index a5157266c5..5c2a1ecff0 100644
--- a/indra/llui/llfolderviewitem.h
+++ b/indra/llui/llfolderviewitem.h
@@ -72,6 +72,8 @@ public:
                                                     text_pad_right,
                                                     arrow_size,
                                                     max_folder_item_overlap;
+        Optional<bool>                              single_folder_mode,
+                                                    double_click_override;
 		Params();
 	};
 
@@ -121,6 +123,8 @@ protected:
 								mIsMouseOverTitle,
 								mAllowWear,
                                 mAllowDrop,
+                                mSingleFolderMode,
+                                mDoubleClickOverride,
 								mSelectPending,
 								mIsItemCut;
 
@@ -174,7 +178,7 @@ public:
 	// Finds width and height of this object and it's children.  Also
 	// makes sure that this view and it's children are the right size.
 	virtual S32 arrange( S32* width, S32* height );
-	virtual S32 getItemHeight();
+	virtual S32 getItemHeight() const;
     virtual S32 getLabelXPos();
     S32 getIconPad();
     S32 getTextPad();
@@ -213,9 +217,9 @@ public:
 
 	void setIsCurSelection(BOOL select) { mIsCurSelection = select; }
 
-	BOOL getIsCurSelection() { return mIsCurSelection; }
+	BOOL getIsCurSelection() const { return mIsCurSelection; }
 
-	BOOL hasVisibleChildren() { return mHasVisibleChildren; }
+	BOOL hasVisibleChildren() const { return mHasVisibleChildren; }
 
 	// true if object can't have children
 	virtual bool isFolderComplete() { return true; }
@@ -264,7 +268,7 @@ public:
 	virtual LLFolderView*	getRoot();
 	virtual const LLFolderView*	getRoot() const;
 	BOOL			isDescendantOf( const LLFolderViewFolder* potential_ancestor );
-	S32				getIndentation() { return mIndentation; }
+	S32				getIndentation() const { return mIndentation; }
 
 	virtual BOOL	passedFilter(S32 filter_generation = -1);
 	virtual BOOL	isPotentiallyVisible(S32 filter_generation = -1);
@@ -277,6 +281,8 @@ public:
     // Does not need filter update
 	virtual void refreshSuffix();
 
+    bool isSingleFolderMode() { return mSingleFolderMode; }
+
 	// LLView functionality
 	virtual BOOL handleRightMouseDown( S32 x, S32 y, MASK mask );
 	virtual BOOL handleMouseDown( S32 x, S32 y, MASK mask );
@@ -387,6 +393,7 @@ public:
 
 	// destroys this folder, and all children
 	virtual void destroyView();
+    void destroyRoot();
 
     // whether known children are fully loaded (arrange sets to true)
     virtual bool isFolderComplete() { return mIsFolderComplete; }
diff --git a/indra/llui/llfolderviewmodel.cpp b/indra/llui/llfolderviewmodel.cpp
index 394581d6d7..96aca62927 100644
--- a/indra/llui/llfolderviewmodel.cpp
+++ b/indra/llui/llfolderviewmodel.cpp
@@ -34,7 +34,7 @@ bool LLFolderViewModelCommon::needsSort(LLFolderViewModelItem* item)
 	return item->getSortVersion() < mTargetSortVersion;
 }
 
-std::string LLFolderViewModelCommon::getStatusText()
+std::string LLFolderViewModelCommon::getStatusText(bool is_empty_folder)
 {
 	if (!contentsReady() || mFolderView->getViewModelItem()->getLastFilterGeneration() < getFilter().getCurrentGeneration())
 	{
@@ -42,7 +42,7 @@ std::string LLFolderViewModelCommon::getStatusText()
 	}
 	else
 	{
-		return getFilter().getEmptyLookupMessage();
+		return getFilter().getEmptyLookupMessage(is_empty_folder);
 	}
 }
 
diff --git a/indra/llui/llfolderviewmodel.h b/indra/llui/llfolderviewmodel.h
index c5e027d314..551a60e097 100644
--- a/indra/llui/llfolderviewmodel.h
+++ b/indra/llui/llfolderviewmodel.h
@@ -69,7 +69,7 @@ public:
 	virtual bool				checkFolder(const LLFolderViewModelItem* folder) const = 0;
 
 	virtual void 				setEmptyLookupMessage(const std::string& message) = 0;
-	virtual std::string			getEmptyLookupMessage() const = 0;
+    virtual std::string			getEmptyLookupMessage(bool is_empty_folder = false) const = 0;
 
 	virtual bool				showAllResults() const = 0;
 
@@ -125,7 +125,7 @@ public:
 	virtual void setFolderView(LLFolderView* folder_view) = 0;
 	virtual LLFolderViewFilter& getFilter() = 0;
 	virtual const LLFolderViewFilter& getFilter() const = 0;
-	virtual std::string getStatusText() = 0;
+	virtual std::string getStatusText(bool is_empty_folder = false) = 0;
 
 	virtual bool startDrag(std::vector<LLFolderViewModelItem*>& items) = 0;
 };
@@ -159,6 +159,8 @@ public:
 	virtual void openItem( void ) = 0;
 	virtual void closeItem( void ) = 0;
 	virtual void selectItem(void) = 0;
+
+    virtual void navigateToFolder(bool new_window = false, bool change_mode = false) = 0;
     
     virtual BOOL isItemWearable() const { return FALSE; }
 
@@ -392,7 +394,7 @@ public:
 		// sort everything
 		mTargetSortVersion++;
 	}
-	virtual std::string getStatusText();
+	virtual std::string getStatusText(bool is_empty_folder = false);
 	virtual void filter();
 
 	void setFolderView(LLFolderView* folder_view) { mFolderView = folder_view;}
diff --git a/indra/llui/lliconctrl.h b/indra/llui/lliconctrl.h
index 5d6c544571..e983d63a01 100644
--- a/indra/llui/lliconctrl.h
+++ b/indra/llui/lliconctrl.h
@@ -39,7 +39,9 @@ class LLUICtrlFactory;
 // Classes
 //
 
-// 
+// Class for diplaying named UI textures
+// Do not use for displaying textures from network,
+// UI textures are stored permanently!
 class LLIconCtrl
 : public LLUICtrl
 {
diff --git a/indra/llui/lllayoutstack.cpp b/indra/llui/lllayoutstack.cpp
index 7b22f9dbdc..7e4e828a88 100644
--- a/indra/llui/lllayoutstack.cpp
+++ b/indra/llui/lllayoutstack.cpp
@@ -216,7 +216,8 @@ LLLayoutStack::Params::Params()
 	drag_handle_first_indent("drag_handle_first_indent", 0),
 	drag_handle_second_indent("drag_handle_second_indent", 0),
 	drag_handle_thickness("drag_handle_thickness", 5),
-	drag_handle_shift("drag_handle_shift", 2)
+	drag_handle_shift("drag_handle_shift", 2),
+    drag_handle_color("drag_handle_color", LLUIColorTable::instance().getColor("ResizebarBody"))
 {
 	addSynonym(border_size, "drag_handle_gap");
 }
@@ -236,7 +237,8 @@ LLLayoutStack::LLLayoutStack(const LLLayoutStack::Params& p)
 	mDragHandleFirstIndent(p.drag_handle_first_indent),
 	mDragHandleSecondIndent(p.drag_handle_second_indent),
 	mDragHandleThickness(p.drag_handle_thickness),
-	mDragHandleShift(p.drag_handle_shift)
+	mDragHandleShift(p.drag_handle_shift),
+    mDragHandleColor(p.drag_handle_color())
 {
 }
 
@@ -523,6 +525,15 @@ void LLLayoutStack::updateLayout()
 	mNeedsLayout = continue_animating;
 } // end LLLayoutStack::updateLayout
 
+void LLLayoutStack::setPanelSpacing(S32 val)
+{
+    if (mPanelSpacing != val)
+    {
+        mPanelSpacing = val;
+        mNeedsLayout = true;
+    }
+}
+
 LLLayoutPanel* LLLayoutStack::findEmbeddedPanel(LLPanel* panelp) const
 {
 	if (!panelp) return NULL;
@@ -576,7 +587,7 @@ void LLLayoutStack::createResizeBar(LLLayoutPanel* panelp)
 				resize_bar_bg_panel_p.follows.flags = FOLLOWS_ALL;
 				resize_bar_bg_panel_p.tab_stop = false;
 				resize_bar_bg_panel_p.background_visible = true;
-				resize_bar_bg_panel_p.bg_alpha_color = LLUIColorTable::instance().getColor("ResizebarBody");
+				resize_bar_bg_panel_p.bg_alpha_color = mDragHandleColor;
 				resize_bar_bg_panel_p.has_border = true;
 				resize_bar_bg_panel_p.border.border_thickness = 1;
 				resize_bar_bg_panel_p.border.highlight_light_color = LLUIColorTable::instance().getColor("ResizebarBorderLight");
diff --git a/indra/llui/lllayoutstack.h b/indra/llui/lllayoutstack.h
index 22f11eb20f..000b919ae7 100644
--- a/indra/llui/lllayoutstack.h
+++ b/indra/llui/lllayoutstack.h
@@ -59,6 +59,8 @@ public:
 		Optional<S32>			drag_handle_thickness;
 		Optional<S32>			drag_handle_shift;
 
+        Optional<LLUIColor>     drag_handle_color;
+
 		Params();
 	};
 
@@ -89,6 +91,7 @@ public:
 	void updateLayout();
 
 	S32 getPanelSpacing() const { return mPanelSpacing; }
+    void setPanelSpacing(S32 val);
 	
 	static void updateClass();
 
@@ -128,6 +131,7 @@ private:
 	S32  mDragHandleSecondIndent;
 	S32  mDragHandleThickness;
 	S32  mDragHandleShift;
+    LLUIColor mDragHandleColor;
 }; // end class LLLayoutStack
 
 
diff --git a/indra/llui/llmenugl.cpp b/indra/llui/llmenugl.cpp
index fe25ac1647..10da3fb7e0 100644
--- a/indra/llui/llmenugl.cpp
+++ b/indra/llui/llmenugl.cpp
@@ -573,13 +573,13 @@ void LLMenuItemGL::onVisibilityChange(BOOL new_visibility)
 //
 // This class represents a separator.
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-LLMenuItemSeparatorGL::Params::Params()
-{
-}
-
 LLMenuItemSeparatorGL::LLMenuItemSeparatorGL(const LLMenuItemSeparatorGL::Params& p) :
 	LLMenuItemGL( p )
 {
+    if (p.on_visible.isProvided())
+    {
+        mVisibleSignal.connect(initEnableCallback(p.on_visible));
+    }
 }
 
 //virtual
@@ -596,6 +596,15 @@ void LLMenuItemSeparatorGL::draw( void )
 	gl_line_2d( PAD, y, getRect().getWidth() - PAD, y );
 }
 
+void LLMenuItemSeparatorGL::buildDrawLabel( void )
+{
+    if (mVisibleSignal.num_slots() > 0)
+    {
+        bool visible = mVisibleSignal(this, LLSD());
+        setVisible(visible);
+    }
+}
+
 BOOL LLMenuItemSeparatorGL::handleMouseDown(S32 x, S32 y, MASK mask)
 {
 	LLMenuGL* parent_menu = getMenu();
diff --git a/indra/llui/llmenugl.h b/indra/llui/llmenugl.h
index 9d3be8d94f..87e3f18ebc 100644
--- a/indra/llui/llmenugl.h
+++ b/indra/llui/llmenugl.h
@@ -234,7 +234,9 @@ class LLMenuItemSeparatorGL : public LLMenuItemGL
 public:
 	struct Params : public LLInitParam::Block<Params, LLMenuItemGL::Params>
 	{
-		Params();
+        Optional<EnableCallbackParam > on_visible;
+        Params() : on_visible("on_visible")
+        {}
 	};
 	LLMenuItemSeparatorGL(const LLMenuItemSeparatorGL::Params& p = LLMenuItemSeparatorGL::Params());
 
@@ -243,7 +245,12 @@ public:
 	/*virtual*/ BOOL handleMouseUp(S32 x, S32 y, MASK mask);
 	/*virtual*/ BOOL handleHover(S32 x, S32 y, MASK mask);
 
+    virtual void buildDrawLabel();
+
 	/*virtual*/ U32 getNominalHeight( void ) const;
+
+private:
+    enable_signal_t mVisibleSignal;
 };
 
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/indra/llui/llscrollbar.cpp b/indra/llui/llscrollbar.cpp
index fde6de4921..735e2d529e 100644
--- a/indra/llui/llscrollbar.cpp
+++ b/indra/llui/llscrollbar.cpp
@@ -188,12 +188,12 @@ void LLScrollbar::setPageSize( S32 page_size )
 	}
 }
 
-BOOL LLScrollbar::isAtBeginning()
+bool LLScrollbar::isAtBeginning() const
 {
 	return mDocPos == 0;
 }
 
-BOOL LLScrollbar::isAtEnd()
+bool LLScrollbar::isAtEnd() const
 {
 	return mDocPos == getDocPosMax();
 }
@@ -591,7 +591,12 @@ void LLScrollbar::setValue(const LLSD& value)
 
 BOOL LLScrollbar::handleKeyHere(KEY key, MASK mask)
 {
-	BOOL handled = FALSE;
+    if (getDocPosMax() == 0 && !getVisible())
+    {
+        return FALSE;
+    }
+
+    BOOL handled = FALSE;
 
 	switch( key )
 	{
diff --git a/indra/llui/llscrollbar.h b/indra/llui/llscrollbar.h
index 5f2f490d81..9be9d22db8 100644
--- a/indra/llui/llscrollbar.h
+++ b/indra/llui/llscrollbar.h
@@ -105,8 +105,8 @@ public:
 	bool				setDocPos( S32 pos, BOOL update_thumb = TRUE );
 	S32					getDocPos() const		{ return mDocPos; }
 
-	BOOL				isAtBeginning();
-	BOOL				isAtEnd();
+	bool				isAtBeginning() const;
+	bool				isAtEnd() const;
 
 	// Setting both at once.
 	void				setDocParams( S32 size, S32 pos );
diff --git a/indra/llui/llscrollcontainer.cpp b/indra/llui/llscrollcontainer.cpp
index 3db38bbfac..ad32f7186c 100644
--- a/indra/llui/llscrollcontainer.cpp
+++ b/indra/llui/llscrollcontainer.cpp
@@ -105,8 +105,8 @@ LLScrollContainer::LLScrollContainer(const LLScrollContainer::Params& p)
 	mBorder = LLUICtrlFactory::create<LLViewBorder> (params);
 	LLView::addChild( mBorder );
 
-	mInnerRect.set( 0, getRect().getHeight(), getRect().getWidth(), 0 );
-	mInnerRect.stretch( -getBorderWidth()  );
+	mInnerRect = getLocalRect();
+	mInnerRect.stretch( -getBorderWidth() );
 
 	LLRect vertical_scroll_rect = mInnerRect;
 	vertical_scroll_rect.mLeft = vertical_scroll_rect.mRight - scrollbar_size;
@@ -124,8 +124,9 @@ LLScrollContainer::LLScrollContainer(const LLScrollContainer::Params& p)
 	mScrollbar[VERTICAL] = LLUICtrlFactory::create<LLScrollbar> (sbparams);
 	LLView::addChild( mScrollbar[VERTICAL] );
 	
-	LLRect horizontal_scroll_rect = mInnerRect;
-	horizontal_scroll_rect.mTop = horizontal_scroll_rect.mBottom + scrollbar_size;
+	LLRect horizontal_scroll_rect;
+	horizontal_scroll_rect.mTop = scrollbar_size;
+	horizontal_scroll_rect.mRight = mInnerRect.getWidth();
 	sbparams.name("scrollable horizontal");
 	sbparams.rect(horizontal_scroll_rect);
 	sbparams.orientation(LLScrollbar::HORIZONTAL);
@@ -134,7 +135,7 @@ LLScrollContainer::LLScrollContainer(const LLScrollContainer::Params& p)
 	sbparams.page_size(mInnerRect.getWidth());
 	sbparams.step_size(VERTICAL_MULTIPLE);
 	sbparams.visible(false);
-	sbparams.follows.flags(FOLLOWS_LEFT | FOLLOWS_RIGHT);
+	sbparams.follows.flags(FOLLOWS_LEFT | FOLLOWS_RIGHT | FOLLOWS_BOTTOM);
 	sbparams.change_callback(p.scroll_callback);
 	mScrollbar[HORIZONTAL] = LLUICtrlFactory::create<LLScrollbar> (sbparams);
 	LLView::addChild( mScrollbar[HORIZONTAL] );
diff --git a/indra/llui/llscrollcontainer.h b/indra/llui/llscrollcontainer.h
index c14099dbd5..dacea2a987 100644
--- a/indra/llui/llscrollcontainer.h
+++ b/indra/llui/llscrollcontainer.h
@@ -98,8 +98,10 @@ public:
 	void			pageDown(S32 overlap = 0);
 	void			goToTop();
 	void			goToBottom();
-	bool			isAtTop() { return mScrollbar[VERTICAL]->isAtBeginning(); }
-	bool			isAtBottom() { return mScrollbar[VERTICAL]->isAtEnd(); }
+	bool			isAtTop() const { return mScrollbar[VERTICAL]->isAtBeginning(); }
+	bool			isAtBottom() const { return mScrollbar[VERTICAL]->isAtEnd(); }
+    S32             getDocPosVertical() const { return mScrollbar[VERTICAL]->getDocPos(); }
+    S32             getDocPosHorizontal() const { return mScrollbar[HORIZONTAL]->getDocPos(); }
 	S32				getBorderWidth() const;
 
 	// LLView functionality
diff --git a/indra/llui/lltabcontainer.cpp b/indra/llui/lltabcontainer.cpp
index 8c841540a5..76b9e448a1 100644
--- a/indra/llui/lltabcontainer.cpp
+++ b/indra/llui/lltabcontainer.cpp
@@ -605,6 +605,7 @@ BOOL LLTabContainer::handleMouseDown( S32 x, S32 y, MASK mask )
 			LLButton* tab_button = getTab(index)->mButton;
 			gFocusMgr.setMouseCapture(this);
 			tab_button->setFocus(TRUE);
+            mMouseDownTimer.start();
 		}
 	}
 	if (handled) {
@@ -653,7 +654,11 @@ BOOL LLTabContainer::handleHover( S32 x, S32 y, MASK mask )
 		handled = LLPanel::handleHover(x, y, mask);
 	}
 
-	commitHoveredButton(x, y);
+    F32 drag_delay = 0.25f; // filter out clicks from dragging
+    if (mMouseDownTimer.getElapsedTimeF32() > drag_delay)
+    {
+        commitHoveredButton(x, y);
+    }
 	return handled;
 }
 
@@ -699,6 +704,7 @@ BOOL LLTabContainer::handleMouseUp( S32 x, S32 y, MASK mask )
 	}
 
 	commitHoveredButton(x, y);
+    mMouseDownTimer.stop();
 	LLPanel* cur_panel = getCurrentPanel();
 	if (hasMouseCapture())
 	{
@@ -1002,7 +1008,7 @@ void LLTabContainer::addTabPanel(const TabPanelParams& panel)
 	}
 	else
 	{
-		//Scip tab button space if they are invisible(EXT - 576)
+		// Skip tab button space if tabs are invisible (EXT-576)
 		tab_panel_top = getRect().getHeight();
 		tab_panel_bottom = LLPANEL_BORDER_WIDTH;
 	}
@@ -1017,9 +1023,9 @@ void LLTabContainer::addTabPanel(const TabPanelParams& panel)
 	}
 	else
 	{
-		tab_panel_rect = LLRect(LLPANEL_BORDER_WIDTH, 
+		tab_panel_rect = LLRect(LLPANEL_BORDER_WIDTH * 3,
 								tab_panel_top,
-								getRect().getWidth()-LLPANEL_BORDER_WIDTH,
+								getRect().getWidth() - LLPANEL_BORDER_WIDTH * 2,
 								tab_panel_bottom );
 	}
 	child->setFollowsAll();
@@ -1106,7 +1112,7 @@ void LLTabContainer::addTabPanel(const TabPanelParams& panel)
 		  p.follows.flags = p.follows.flags() | FOLLOWS_TOP;
 		}
 		else
-		  { 
+		{ 
 		    p.name("htab_"+std::string(child->getName()));
 		    p.visible(false);
 		    p.image_unselected(tab_img);
diff --git a/indra/llui/lltabcontainer.h b/indra/llui/lltabcontainer.h
index 8f8cedb1b9..aa4a08c4ff 100644
--- a/indra/llui/lltabcontainer.h
+++ b/indra/llui/lltabcontainer.h
@@ -320,6 +320,7 @@ private:
 	LLUIColor						mTabsFlashingColor;
 	S32								mTabIconCtrlPad;
 	bool							mUseTabEllipses;
+    LLFrameTimer					mMouseDownTimer;
 };
 
 #endif  // LL_TABCONTAINER_H
diff --git a/indra/llui/lltooltip.cpp b/indra/llui/lltooltip.cpp
index 2f56a8b1d0..a6552d4ff1 100644
--- a/indra/llui/lltooltip.cpp
+++ b/indra/llui/lltooltip.cpp
@@ -163,6 +163,7 @@ LLToolTip::LLToolTip(const LLToolTip::Params& p)
 :	LLPanel(p),
 	mHasClickCallback(p.click_callback.isProvided()),
 	mPadding(p.padding),
+	mMaxWidth(p.max_width),
 	mTextBox(NULL),
 	mInfoButton(NULL),
 	mPlayMediaButton(NULL),
@@ -272,7 +273,7 @@ void LLToolTip::initFromParams(const LLToolTip::Params& p)
 
 	// do this *after* we've had our size set in LLPanel::initFromParams();
 	const S32 REALLY_LARGE_HEIGHT = 10000;
-	mTextBox->reshape(p.max_width, REALLY_LARGE_HEIGHT);
+	mTextBox->reshape(mMaxWidth, REALLY_LARGE_HEIGHT);
 
 	if (p.styled_message.isProvided())
 	{
@@ -288,16 +289,19 @@ void LLToolTip::initFromParams(const LLToolTip::Params& p)
 		mTextBox->setText(p.message());
 	}
 
-	S32 text_width = llmin(p.max_width(), mTextBox->getTextPixelWidth() + 1);
+	updateTextBox();
+	snapToChildren();
+}
+
+void LLToolTip::updateTextBox()
+{
+	S32 text_width = llmin(mMaxWidth, mTextBox->getTextPixelWidth() + 1);
 	S32 text_height = mTextBox->getTextPixelHeight();
 	mTextBox->reshape(text_width, text_height);
-	if (mInfoButton)
-	{
-		LLRect text_rect = mTextBox->getRect();
-		LLRect icon_rect = mInfoButton->getRect();
-		mTextBox->translate(0, icon_rect.getCenterY() - text_rect.getCenterY());
-	}
-
+}
+ 
+void LLToolTip::snapToChildren()
+{
 	// reshape tooltip panel to fit text box
 	LLRect tooltip_rect = calcBoundingRect();
 	tooltip_rect.mTop += mPadding;
@@ -305,7 +309,14 @@ void LLToolTip::initFromParams(const LLToolTip::Params& p)
 	tooltip_rect.mBottom = 0;
 	tooltip_rect.mLeft = 0;
 
-	mTextBox->reshape(mTextBox->getRect().getWidth(), llmax(mTextBox->getRect().getHeight(), tooltip_rect.getHeight() - 2 * mPadding));
+	if (mInfoButton)
+	{
+		mTextBox->reshape(mTextBox->getRect().getWidth(), llmax(mTextBox->getRect().getHeight(), tooltip_rect.getHeight() - 2 * mPadding));
+
+		LLRect text_rect = mTextBox->getRect();
+		LLRect icon_rect = mInfoButton->getRect();
+		mInfoButton->translate(0, text_rect.getCenterY() - icon_rect.getCenterY());
+	}
 
 	setShape(tooltip_rect);
 }
@@ -428,7 +439,10 @@ void LLToolTipMgr::createToolTip(const LLToolTip::Params& params)
 	}
 	tooltip_params.rect = LLRect (0, 1, 1, 0);
 
-	mToolTip = LLUICtrlFactory::create<LLToolTip> (tooltip_params);
+	if (tooltip_params.create_callback.isProvided())
+		mToolTip = tooltip_params.create_callback()(tooltip_params);
+	else
+		mToolTip = LLUICtrlFactory::create<LLToolTip> (tooltip_params);
 
 	gToolTipView->addChild(mToolTip);
 
diff --git a/indra/llui/lltooltip.h b/indra/llui/lltooltip.h
index 0b1fbe5367..86943625ff 100644
--- a/indra/llui/lltooltip.h
+++ b/indra/llui/lltooltip.h
@@ -68,6 +68,7 @@ public:
 	struct Params : public LLInitParam::Block<Params, LLPanel::Params> 
 	{
 		typedef boost::function<void(void)> click_callback_t;
+		typedef boost::function<LLToolTip*(LLToolTip::Params)> create_callback_t;
 
 		Optional<std::string>		message;
 		Multiple<StyledText>		styled_message;
@@ -84,6 +85,8 @@ public:
 		Optional<bool>				time_based_media,
 									web_based_media,
 									media_playing;
+		Optional<create_callback_t>	create_callback;
+		Optional<LLSD>				create_params;
 		Optional<click_callback_t>	click_callback,
 									click_playmedia_callback,
 									click_homepage_callback;
@@ -103,11 +106,15 @@ public:
 	bool hasClickCallback();
 
 	LLToolTip(const Params& p);
-	void initFromParams(const LLToolTip::Params& params);
+	virtual void initFromParams(const LLToolTip::Params& params);
 
 	void getToolTipMessage(std::string & message);
 
-private:
+protected:
+	void updateTextBox();
+	void snapToChildren();
+
+protected:
 	class LLTextBox*	mTextBox;
 	class LLButton*     mInfoButton;
 	class LLButton*     mPlayMediaButton;
@@ -117,6 +124,7 @@ private:
 	LLFrameTimer	mVisibleTimer;
 	bool			mHasClickCallback;
 	S32				mPadding;	// pixels
+	S32				mMaxWidth;
 };
 
 // used for the inspector tooltips which need different background images etc.
diff --git a/indra/llui/lluictrl.cpp b/indra/llui/lluictrl.cpp
index 2196ba201b..21afcae7c3 100644
--- a/indra/llui/lluictrl.cpp
+++ b/indra/llui/lluictrl.cpp
@@ -531,6 +531,15 @@ void LLUICtrl::setControlVariable(LLControlVariable* control)
 	}
 }
 
+void LLUICtrl::removeControlVariable()
+{
+    if (mControlVariable)
+    {
+        mControlConnection.disconnect();
+        mControlVariable = NULL;
+    }
+}
+
 //virtual
 void LLUICtrl::setControlName(const std::string& control_name, LLView *context)
 {
diff --git a/indra/llui/lluictrl.h b/indra/llui/lluictrl.h
index 424b4879ce..ef295976a2 100644
--- a/indra/llui/lluictrl.h
+++ b/indra/llui/lluictrl.h
@@ -176,6 +176,7 @@ public:
 	bool setControlValue(const LLSD& value);
 	void setControlVariable(LLControlVariable* control);
 	virtual void setControlName(const std::string& control, LLView *context = NULL);
+    void removeControlVariable();
 	
 	LLControlVariable* getControlVariable() { return mControlVariable; } 
 	
diff --git a/indra/llui/llview.cpp b/indra/llui/llview.cpp
index 3344300635..da7868d804 100644
--- a/indra/llui/llview.cpp
+++ b/indra/llui/llview.cpp
@@ -311,7 +311,13 @@ bool LLView::addChild(LLView* child, S32 tab_group)
 	}
 
 	child->mParentView = this;
-	updateBoundingRect();
+    if (getVisible() && child->getVisible())
+    {
+        // if child isn't visible it won't affect bounding rect
+        // if current view is not visible it will be recalculated
+        // on visibility change
+        updateBoundingRect();
+    }
 	mLastTabGroup = tab_group;
 	return true;
 }
@@ -581,6 +587,7 @@ void LLView::deleteAllChildren()
         delete viewp;
         mChildList.pop_front();
 	}
+    updateBoundingRect();
 }
 
 void LLView::setAllChildrenEnabled(BOOL b)
@@ -879,6 +886,17 @@ LLView*	LLView::childFromPoint(S32 x, S32 y, bool recur)
 	return 0;
 }
 
+F32 LLView::getTooltipTimeout()
+{
+    static LLCachedControl<F32> tooltip_fast_delay(*LLUI::getInstance()->mSettingGroups["config"], "ToolTipFastDelay", 0.1f);
+    static LLCachedControl<F32> tooltip_delay(*LLUI::getInstance()->mSettingGroups["config"], "ToolTipDelay", 0.7f);
+    // allow "scrubbing" over ui by showing next tooltip immediately
+    // if previous one was still visible
+    return (F32)(LLToolTipMgr::instance().toolTipVisible()
+    ? tooltip_fast_delay
+    : tooltip_delay);
+}
+
 BOOL LLView::handleToolTip(S32 x, S32 y, MASK mask)
 {
 	BOOL handled = FALSE;
@@ -888,14 +906,7 @@ BOOL LLView::handleToolTip(S32 x, S32 y, MASK mask)
 	std::string tooltip = getToolTip();
 	if (!tooltip.empty())
 	{
-        static LLCachedControl<F32> tooltip_fast_delay(*LLUI::getInstance()->mSettingGroups["config"], "ToolTipFastDelay", 0.1f);
-        static LLCachedControl<F32> tooltip_delay(*LLUI::getInstance()->mSettingGroups["config"], "ToolTipDelay", 0.7f);
         static LLCachedControl<bool> allow_ui_tooltips(*LLUI::getInstance()->mSettingGroups["config"], "BasicUITooltips", true);
-		// allow "scrubbing" over ui by showing next tooltip immediately
-		// if previous one was still visible
-		F32 timeout = LLToolTipMgr::instance().toolTipVisible() 
-		              ? tooltip_fast_delay
-		              : tooltip_delay;
 
 		// Even if we don't show tooltips, consume the event, nothing below should show tooltip
 		if (allow_ui_tooltips)
@@ -903,7 +914,7 @@ BOOL LLView::handleToolTip(S32 x, S32 y, MASK mask)
 			LLToolTipMgr::instance().show(LLToolTip::Params()
 			                              .message(tooltip)
 			                              .sticky_rect(calcScreenRect())
-			                              .delay_time(timeout));
+			                              .delay_time(getTooltipTimeout()));
 		}
 		handled = TRUE;
 	}
diff --git a/indra/llui/llview.h b/indra/llui/llview.h
index 8aa97aac39..7360fd0fb9 100644
--- a/indra/llui/llview.h
+++ b/indra/llui/llview.h
@@ -243,6 +243,7 @@ public:
 
 	ECursorType	getHoverCursor() { return mHoverCursor; }
 
+    static F32 getTooltipTimeout();
 	virtual const std::string getToolTip() const			{ return mToolTipMsg.getString(); }
 
 	void		sendChildToFront(LLView* child);