Merged in lindenlab/viewer-release

38 files changed, 256 insertions, 294 deletions

diff --git a/indra/llui/llaccordionctrltab.cpp b/indra/llui/llaccordionctrltab.cpp
index eaf1284237..1034a21905 100644
--- a/indra/llui/llaccordionctrltab.cpp
+++ b/indra/llui/llaccordionctrltab.cpp
@@ -977,7 +977,7 @@ void LLAccordionCtrlTab::drawChild(const LLRect& root_rect,LLView* child)
 		LLRect screen_rect;
 		localRectToScreen(child->getRect(),&screen_rect);
 		
-		if ( root_rect.overlaps(screen_rect)  && LLUI::sDirtyRect.overlaps(screen_rect))
+		if ( root_rect.overlaps(screen_rect)  && LLUI::getInstance()->mDirtyRect.overlaps(screen_rect))
 		{
 			gGL.matrixMode(LLRender::MM_MODELVIEW);
 			LLUI::pushMatrix();
diff --git a/indra/llui/llbutton.cpp b/indra/llui/llbutton.cpp
index 6b7a8a8b86..27444b7f5b 100644
--- a/indra/llui/llbutton.cpp
+++ b/indra/llui/llbutton.cpp
@@ -90,8 +90,8 @@ LLButton::Params::Params()
 	image_overlay_disabled_color("image_overlay_disabled_color", LLColor4::white % 0.3f),
 	image_overlay_selected_color("image_overlay_selected_color", LLColor4::white),
 	flash_color("flash_color"),
-	pad_right("pad_right", LLUI::sSettingGroups["config"]->getS32("ButtonHPad")),
-	pad_left("pad_left", LLUI::sSettingGroups["config"]->getS32("ButtonHPad")),
+	pad_right("pad_right", LLUI::getInstance()->mSettingGroups["config"]->getS32("ButtonHPad")),
+	pad_left("pad_left", LLUI::getInstance()->mSettingGroups["config"]->getS32("ButtonHPad")),
 	pad_bottom("pad_bottom"),
 	click_callback("click_callback"),
 	mouse_down_callback("mouse_down_callback"),
@@ -614,7 +614,7 @@ void LLButton::getOverlayImageSize(S32& overlay_width, S32& overlay_height)
 // virtual
 void LLButton::draw()
 {
-	static LLCachedControl<bool> sEnableButtonFlashing(*LLUI::sSettingGroups["config"], "EnableButtonFlashing", true);
+	static LLCachedControl<bool> sEnableButtonFlashing(*LLUI::getInstance()->mSettingGroups["config"], "EnableButtonFlashing", true);
 	F32 alpha = mUseDrawContextAlpha ? getDrawContext().mAlpha : getCurrentTransparency();
 
 	bool pressed_by_keyboard = FALSE;
@@ -628,7 +628,7 @@ void LLButton::draw()
 	{
 		S32 local_mouse_x ;
 		S32 local_mouse_y;
-		LLUI::getMousePositionLocal(this, &local_mouse_x, &local_mouse_y);
+		LLUI::getInstance()->getMousePositionLocal(this, &local_mouse_x, &local_mouse_y);
 		mouse_pressed_and_over = pointInView(local_mouse_x, local_mouse_y);
 	}
 
@@ -1261,10 +1261,10 @@ void LLButton::showHelp(LLUICtrl* ctrl, const LLSD& sdname)
 	// search back through the button's parents for a panel
 	// with a help_topic string defined
 	std::string help_topic;
-	if (LLUI::sHelpImpl &&
+	if (LLUI::getInstance()->mHelpImpl &&
 	    ctrl->findHelpTopic(help_topic))
 	{
-		LLUI::sHelpImpl->showTopic(help_topic);
+		LLUI::getInstance()->mHelpImpl->showTopic(help_topic);
 		return; // success
 	}
 
diff --git a/indra/llui/llchatentry.cpp b/indra/llui/llchatentry.cpp
index dac001afab..c506576126 100644
--- a/indra/llui/llchatentry.cpp
+++ b/indra/llui/llchatentry.cpp
@@ -201,7 +201,7 @@ BOOL LLChatEntry::handleSpecialKey(const KEY key, const MASK mask)
 			}
 			else
 			{
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 			handled = TRUE;
 		}
@@ -225,7 +225,7 @@ BOOL LLChatEntry::handleSpecialKey(const KEY key, const MASK mask)
 			}
 			else
 			{
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 			handled = TRUE;
 		}
diff --git a/indra/llui/llcombobox.cpp b/indra/llui/llcombobox.cpp
index b2ad38bddf..c7f0326ed4 100644
--- a/indra/llui/llcombobox.cpp
+++ b/indra/llui/llcombobox.cpp
@@ -668,7 +668,7 @@ void LLComboBox::showList()
 	mButton->setToggleState(TRUE);
 	mList->setVisible(TRUE);
 	
-	LLUI::addPopup(this);
+	LLUI::getInstance()->addPopup(this);
 
 	setUseBoundingRect(TRUE);
 //	updateBoundingRect();
@@ -694,7 +694,7 @@ void LLComboBox::hideList()
 		mList->mouseOverHighlightNthItem(-1);
 
 		setUseBoundingRect(FALSE);
-		LLUI::removePopup(this);
+		LLUI::getInstance()->removePopup(this);
 //		updateBoundingRect();
 	}
 }
diff --git a/indra/llui/llconsole.cpp b/indra/llui/llconsole.cpp
index 26ae31cac6..5f50e46233 100644
--- a/indra/llui/llconsole.cpp
+++ b/indra/llui/llconsole.cpp
@@ -68,7 +68,7 @@ LLConsole::LLConsole(const LLConsole::Params& p)
 		setFontSize(p.font_size_index);
 	}
 	mFadeTime = mLinePersistTime - FADE_DURATION;
-	setMaxLines(LLUI::sSettingGroups["config"]->getS32("ConsoleMaxLines"));
+	setMaxLines(LLUI::getInstance()->mSettingGroups["config"]->getS32("ConsoleMaxLines"));
 }
 
 void LLConsole::setLinePersistTime(F32 seconds)
@@ -180,7 +180,7 @@ void LLConsole::draw()
 
 	LLUIImagePtr imagep = LLUI::getUIImage("transparent");
 
-	F32 console_opacity = llclamp(LLUI::sSettingGroups["config"]->getF32("ConsoleBackgroundOpacity"), 0.f, 1.f);
+	F32 console_opacity = llclamp(LLUI::getInstance()->mSettingGroups["config"]->getF32("ConsoleBackgroundOpacity"), 0.f, 1.f);
 	LLColor4 color = LLUIColorTable::instance().getColor("ConsoleBackground");
 	color.mV[VALPHA] *= console_opacity;
 
diff --git a/indra/llui/llconsole.h b/indra/llui/llconsole.h
index 5ff05698b0..04f5e71609 100644
--- a/indra/llui/llconsole.h
+++ b/indra/llui/llconsole.h
@@ -51,7 +51,7 @@ public:
 		Optional<F32>	persist_time;
 		Optional<S32>	font_size_index;
 		Params()
-		:	max_lines("max_lines", LLUI::sSettingGroups["config"]->getS32("ConsoleMaxLines")),
+		:	max_lines("max_lines", LLUI::getInstance()->mSettingGroups["config"]->getS32("ConsoleMaxLines")),
 			persist_time("persist_time", 0.f), // forever
 			font_size_index("font_size_index")
 		{
diff --git a/indra/llui/llflashtimer.cpp b/indra/llui/llflashtimer.cpp
index 6d9c429b08..39793316f4 100644
--- a/indra/llui/llflashtimer.cpp
+++ b/indra/llui/llflashtimer.cpp
@@ -40,10 +40,10 @@ LLFlashTimer::LLFlashTimer(callback_t cb, S32 count, F32 period)
 	// By default use settings from settings.xml to be able change them via Debug settings. See EXT-5973.
 	// Due to Timer is implemented as derived class from EventTimer it is impossible to change period
 	// in runtime. So, both settings are made as required restart.
-	mFlashCount = 2 * ((count > 0) ? count : LLUI::sSettingGroups["config"]->getS32("FlashCount"));
+	mFlashCount = 2 * ((count > 0) ? count : LLUI::getInstance()->mSettingGroups["config"]->getS32("FlashCount"));
 	if (mPeriod <= 0)
 	{
-		mPeriod = LLUI::sSettingGroups["config"]->getF32("FlashPeriod");
+		mPeriod = LLUI::getInstance()->mSettingGroups["config"]->getF32("FlashPeriod");
 	}
 }
 
diff --git a/indra/llui/llfloater.cpp b/indra/llui/llfloater.cpp
index a245dd8f78..42802cd339 100644
--- a/indra/llui/llfloater.cpp
+++ b/indra/llui/llfloater.cpp
@@ -215,14 +215,14 @@ void LLFloater::initClass()
 		sButtonToolTips[i] = LLTrans::getString( sButtonToolTipsIndex[i] );
 	}
 
-	LLControlVariable* ctrl = LLUI::sSettingGroups["config"]->getControl("ActiveFloaterTransparency").get();
+    LLControlVariable* ctrl = LLUI::getInstance()->mSettingGroups["config"]->getControl("ActiveFloaterTransparency").get();
 	if (ctrl)
 	{
 		ctrl->getSignal()->connect(boost::bind(&LLFloater::updateActiveFloaterTransparency));
 		updateActiveFloaterTransparency();
 	}
 
-	ctrl = LLUI::sSettingGroups["config"]->getControl("InactiveFloaterTransparency").get();
+    ctrl = LLUI::getInstance()->mSettingGroups["config"]->getControl("InactiveFloaterTransparency").get();
 	if (ctrl)
 	{
 		ctrl->getSignal()->connect(boost::bind(&LLFloater::updateInactiveFloaterTransparency));
@@ -374,13 +374,13 @@ void LLFloater::layoutDragHandle()
 // static
 void LLFloater::updateActiveFloaterTransparency()
 {
-	sActiveControlTransparency = LLUI::sSettingGroups["config"]->getF32("ActiveFloaterTransparency");
+    sActiveControlTransparency = LLUI::getInstance()->mSettingGroups["config"]->getF32("ActiveFloaterTransparency");
 }
 
 // static
 void LLFloater::updateInactiveFloaterTransparency()
 {
-	sInactiveControlTransparency = LLUI::sSettingGroups["config"]->getF32("InactiveFloaterTransparency");
+    sInactiveControlTransparency = LLUI::getInstance()->mSettingGroups["config"]->getF32("InactiveFloaterTransparency");
 }
 
 void LLFloater::addResizeCtrls()
@@ -579,7 +579,7 @@ std::string LLFloater::getControlName(const std::string& name, const LLSD& key)
 LLControlGroup*	LLFloater::getControlGroup()
 {
 	// Floater size, position, visibility, etc are saved in per-account settings.
-	return LLUI::sSettingGroups["account"];
+	return LLUI::getInstance()->mSettingGroups["account"];
 }
 
 void LLFloater::setVisible( BOOL visible )
@@ -592,7 +592,7 @@ void LLFloater::setVisible( BOOL visible )
 
 	if( !visible )
 	{
-		LLUI::removePopup(this);
+		LLUI::getInstance()->removePopup(this);
 
 		if( gFocusMgr.childHasMouseCapture( this ) )
 		{
@@ -818,7 +818,7 @@ void LLFloater::reshape(S32 width, S32 height, BOOL called_from_parent)
 
 void LLFloater::releaseFocus()
 {
-	LLUI::removePopup(this);
+	LLUI::getInstance()->removePopup(this);
 
 	setFocus(FALSE);
 
@@ -1771,13 +1771,13 @@ void LLFloater::onClickDock(LLFloater* self)
 // static
 void LLFloater::onClickHelp( LLFloater* self )
 {
-	if (self && LLUI::sHelpImpl)
+	if (self && LLUI::getInstance()->mHelpImpl)
 	{
 		// find the current help context for this floater
 		std::string help_topic;
 		if (self->findHelpTopic(help_topic))
 		{
-			LLUI::sHelpImpl->showTopic(help_topic);
+			LLUI::getInstance()->mHelpImpl->showTopic(help_topic);
 		}
 	}
 }
@@ -2931,7 +2931,7 @@ void LLFloaterView::syncFloaterTabOrder()
 	if (modal_dialog)
 	{
 		// If we have a visible modal dialog, make sure that it has focus
-		LLUI::addPopup(modal_dialog);
+		LLUI::getInstance()->addPopup(modal_dialog);
 		
 		if( !gFocusMgr.childHasKeyboardFocus( modal_dialog ) )
 		{
diff --git a/indra/llui/llfloaterreg.cpp b/indra/llui/llfloaterreg.cpp
index 9ef290abc0..85e07fc6a6 100644
--- a/indra/llui/llfloaterreg.cpp
+++ b/indra/llui/llfloaterreg.cpp
@@ -445,7 +445,7 @@ void LLFloaterReg::registerControlVariables()
 		}
 	}
 
-	const LLSD& exclude_list = LLUI::sSettingGroups["config"]->getLLSD("always_showable_floaters");
+	const LLSD& exclude_list = LLUI::getInstance()->mSettingGroups["config"]->getLLSD("always_showable_floaters");
 	for (LLSD::array_const_iterator iter = exclude_list.beginArray();
 		iter != exclude_list.endArray();
 		iter++)
diff --git a/indra/llui/llfocusmgr.cpp b/indra/llui/llfocusmgr.cpp
index 1b213c3418..7b0a6cbdae 100644
--- a/indra/llui/llfocusmgr.cpp
+++ b/indra/llui/llfocusmgr.cpp
@@ -183,7 +183,7 @@ void LLFocusMgr::releaseFocusIfNeeded( LLView* view )
 		}
 	}
 
-	LLUI::removePopup(view);
+	LLUI::getInstance()->removePopup(view);
 }
 
 void LLFocusMgr::setKeyboardFocus(LLFocusableElement* new_focus, BOOL lock, BOOL keystrokes_only)
@@ -481,7 +481,7 @@ void LLFocusMgr::setAppHasFocus(BOOL focus)
 	// release focus from "top ctrl"s, which generally hides them
 	if (!focus)
 	{
-		LLUI::clearPopups();
+		LLUI::getInstance()->clearPopups();
 	}
 	mAppHasFocus = focus; 
 }
diff --git a/indra/llui/llfolderview.cpp b/indra/llui/llfolderview.cpp
index 895753aeae..b05a9807d0 100644
--- a/indra/llui/llfolderview.cpp
+++ b/indra/llui/llfolderview.cpp
@@ -338,7 +338,7 @@ static LLTrace::BlockTimerStatHandle FTM_FILTER("Filter Folder View");
 void LLFolderView::filter( LLFolderViewFilter& filter )
 {
 	LL_RECORD_BLOCK_TIME(FTM_FILTER);
-    filter.resetTime(llclamp(LLUI::sSettingGroups["config"]->getS32(mParentPanel.get()->getVisible() ? "FilterItemsMaxTimePerFrameVisible" : "FilterItemsMaxTimePerFrameUnvisible"), 1, 100));
+    filter.resetTime(llclamp(LLUI::getInstance()->mSettingGroups["config"]->getS32(mParentPanel.get()->getVisible() ? "FilterItemsMaxTimePerFrameVisible" : "FilterItemsMaxTimePerFrameUnvisible"), 1, 100));
 
     // Note: we filter the model, not the view
 	getViewModelItem()->filter(filter);
@@ -657,7 +657,7 @@ void LLFolderView::draw()
 		closeAutoOpenedFolders();
 	}
 
-	if (mSearchTimer.getElapsedTimeF32() > LLUI::sSettingGroups["config"]->getF32("TypeAheadTimeout") || !mSearchString.size())
+	if (mSearchTimer.getElapsedTimeF32() > LLUI::getInstance()->mSettingGroups["config"]->getF32("TypeAheadTimeout") || !mSearchString.size())
 	{
 		mSearchString.clear();
 	}
@@ -733,7 +733,7 @@ void LLFolderView::closeRenamer( void )
 	if (mRenamer && mRenamer->getVisible())
 	{
 		// Triggers onRenamerLost() that actually closes the renamer.
-		LLUI::removePopup(mRenamer);
+		LLUI::getInstance()->removePopup(mRenamer);
 	}
 }
 
@@ -1064,7 +1064,7 @@ void LLFolderView::startRenamingSelectedItem( void )
 		// set focus will fail unless item is visible
 		mRenamer->setFocus( TRUE );
 		mRenamer->setTopLostCallback(boost::bind(&LLFolderView::onRenamerLost, this));
-		LLUI::addPopup(mRenamer);
+		LLUI::getInstance()->addPopup(mRenamer);
 	}
 }
 
@@ -1321,7 +1321,7 @@ BOOL LLFolderView::handleUnicodeCharHere(llwchar uni_char)
 		}
 
 		//do text search
-		if (mSearchTimer.getElapsedTimeF32() > LLUI::sSettingGroups["config"]->getF32("TypeAheadTimeout"))
+		if (mSearchTimer.getElapsedTimeF32() > LLUI::getInstance()->mSettingGroups["config"]->getF32("TypeAheadTimeout"))
 		{
 			mSearchString.clear();
 		}
@@ -1803,7 +1803,7 @@ void LLFolderView::updateRenamerPosition()
 		screenPointToLocal( x, y, &x, &y );
 		mRenamer->setOrigin( x, y );
 
-		LLRect scroller_rect(0, 0, (S32)LLUI::getWindowSize().mV[VX], 0);
+		LLRect scroller_rect(0, 0, (S32)LLUI::getInstance()->getWindowSize().mV[VX], 0);
 		if (mScrollContainer)
 		{
 			scroller_rect = mScrollContainer->getContentWindowRect();
diff --git a/indra/llui/llfolderviewitem.cpp b/indra/llui/llfolderviewitem.cpp
index 0510e472c5..2de47f1a19 100644
--- a/indra/llui/llfolderviewitem.cpp
+++ b/indra/llui/llfolderviewitem.cpp
@@ -548,7 +548,7 @@ BOOL LLFolderViewItem::handleMouseDown( S32 x, S32 y, MASK mask )
 
 BOOL LLFolderViewItem::handleHover( S32 x, S32 y, MASK mask )
 {
-	static LLCachedControl<S32> drag_and_drop_threshold(*LLUI::sSettingGroups["config"],"DragAndDropDistanceThreshold", 3);
+	static LLCachedControl<S32> drag_and_drop_threshold(*LLUI::getInstance()->mSettingGroups["config"],"DragAndDropDistanceThreshold", 3);
 
 	mIsMouseOverTitle = (y > (getRect().getHeight() - mItemHeight));
 
diff --git a/indra/llui/llfolderviewmodel.cpp b/indra/llui/llfolderviewmodel.cpp
index 3363dc5316..3b45fb53a2 100644
--- a/indra/llui/llfolderviewmodel.cpp
+++ b/indra/llui/llfolderviewmodel.cpp
@@ -48,7 +48,7 @@ std::string LLFolderViewModelCommon::getStatusText()
 
 void LLFolderViewModelCommon::filter()
 {
-    getFilter().resetTime(llclamp(LLUI::sSettingGroups["config"]->getS32("FilterItemsMaxTimePerFrameVisible"), 1, 100));
+    getFilter().resetTime(llclamp(LLUI::getInstance()->mSettingGroups["config"]->getS32("FilterItemsMaxTimePerFrameVisible"), 1, 100));
 	mFolderView->getViewModelItem()->filter(getFilter());
 }
 
diff --git a/indra/llui/lllayoutstack.cpp b/indra/llui/lllayoutstack.cpp
index 955e7089f4..4a464b3507 100644
--- a/indra/llui/lllayoutstack.cpp
+++ b/indra/llui/lllayoutstack.cpp
@@ -209,7 +209,7 @@ LLLayoutStack::Params::Params()
 	open_time_constant("open_time_constant", 0.02f),
 	close_time_constant("close_time_constant", 0.03f),
 	resize_bar_overlap("resize_bar_overlap", 1),
-	border_size("border_size", LLCachedControl<S32>(*LLUI::sSettingGroups["config"], "UIResizeBarHeight", 0)),
+	border_size("border_size", LLCachedControl<S32>(*LLUI::getInstance()->mSettingGroups["config"], "UIResizeBarHeight", 0)),
 	show_drag_handle("show_drag_handle", false),
 	drag_handle_first_indent("drag_handle_first_indent", 0),
 	drag_handle_second_indent("drag_handle_second_indent", 0),
diff --git a/indra/llui/lllineeditor.cpp b/indra/llui/lllineeditor.cpp
index ff8bf30319..3ad504d68d 100644
--- a/indra/llui/lllineeditor.cpp
+++ b/indra/llui/lllineeditor.cpp
@@ -941,7 +941,7 @@ void LLLineEditor::removeChar()
 	}
 	else
 	{
-		LLUI::reportBadKeystroke();
+		LLUI::getInstance()->reportBadKeystroke();
 	}
 }
 
@@ -992,7 +992,7 @@ void LLLineEditor::addChar(const llwchar uni_char)
 	}
 	else
 	{
-		LLUI::reportBadKeystroke();
+		LLUI::getInstance()->reportBadKeystroke();
 	}
 
 	getWindow()->hideCursorUntilMouseMove();
@@ -1088,7 +1088,7 @@ BOOL LLLineEditor::handleSelectionKey(KEY key, MASK mask)
 			}
 			else
 			{
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 			break;
 
@@ -1104,7 +1104,7 @@ BOOL LLLineEditor::handleSelectionKey(KEY key, MASK mask)
 			}
 			else
 			{
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 			break;
 
@@ -1184,7 +1184,7 @@ void LLLineEditor::cut()
 		if( need_to_rollback )
 		{
 			rollback.doRollback( this );
-			LLUI::reportBadKeystroke();
+			LLUI::getInstance()->reportBadKeystroke();
 		}
 		else
 		{
@@ -1288,7 +1288,7 @@ void LLLineEditor::pasteHelper(bool is_primary)
 				}
 				// Truncate the clean string at the limit of what will fit
 				clean_string = clean_string.substr(0, wchars_that_fit);
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 
 			if (mMaxLengthChars)
@@ -1300,7 +1300,7 @@ void LLLineEditor::pasteHelper(bool is_primary)
 					clean_string = clean_string.substr(0, available_chars);
 				}
 
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 
 			mText.insert(getCursor(), clean_string);
@@ -1312,7 +1312,7 @@ void LLLineEditor::pasteHelper(bool is_primary)
 			if( need_to_rollback )
 			{
 				rollback.doRollback( this );
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 			else
 			{
@@ -1376,7 +1376,7 @@ BOOL LLLineEditor::handleSpecialKey(KEY key, MASK mask)
 			}
 			else
 			{
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 		}
 		handled = TRUE;
@@ -1425,7 +1425,7 @@ BOOL LLLineEditor::handleSpecialKey(KEY key, MASK mask)
 			}
 			else
 			{
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 			handled = TRUE;
 		}
@@ -1452,7 +1452,7 @@ BOOL LLLineEditor::handleSpecialKey(KEY key, MASK mask)
 			}
 			else
 			{
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 			handled = TRUE;
 		}
@@ -1469,7 +1469,7 @@ BOOL LLLineEditor::handleSpecialKey(KEY key, MASK mask)
 			}
 			else
 			{
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 			handled = TRUE;
 		}
@@ -1486,7 +1486,7 @@ BOOL LLLineEditor::handleSpecialKey(KEY key, MASK mask)
 			}
 			else
 			{
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 			handled = TRUE;
 		}
@@ -1567,7 +1567,7 @@ BOOL LLLineEditor::handleKeyHere(KEY key, MASK mask )
 			{
 				rollback.doRollback(this);
 
-				LLUI::reportBadKeystroke();
+				LLUI::getInstance()->reportBadKeystroke();
 			}
 
 			// Notify owner if requested
@@ -1623,7 +1623,7 @@ BOOL LLLineEditor::handleUnicodeCharHere(llwchar uni_char)
 		{
 			rollback.doRollback( this );
 
-			LLUI::reportBadKeystroke();
+			LLUI::getInstance()->reportBadKeystroke();
 		}
 
 		// Notify owner if requested
@@ -1674,7 +1674,7 @@ void LLLineEditor::doDelete()
 		if( need_to_rollback )
 		{
 			rollback.doRollback( this );
-			LLUI::reportBadKeystroke();
+			LLUI::getInstance()->reportBadKeystroke();
 		}
 		else
 		{
@@ -2478,7 +2478,7 @@ BOOL LLLineEditor::getPreeditLocation(S32 query_offset, LLCoordGL *coord, LLRect
 	{
 		LLRect control_rect_screen;
 		localRectToScreen(getRect(), &control_rect_screen);
-		LLUI::screenRectToGL(control_rect_screen, control);
+		LLUI::getInstance()->screenRectToGL(control_rect_screen, control);
 	}
 
 	S32 preedit_left_column, preedit_right_column;
@@ -2508,7 +2508,7 @@ BOOL LLLineEditor::getPreeditLocation(S32 query_offset, LLCoordGL *coord, LLRect
 		S32 query_local = findPixelNearestPos(query - getCursor());
 		S32 query_screen_x, query_screen_y;
 		localPointToScreen(query_local, getRect().getHeight() / 2, &query_screen_x, &query_screen_y);
-		LLUI::screenPointToGL(query_screen_x, query_screen_y, &coord->mX, &coord->mY);
+		LLUI::getInstance()->screenPointToGL(query_screen_x, query_screen_y, &coord->mX, &coord->mY);
 	}
 
 	if (bounds)
@@ -2524,7 +2524,7 @@ BOOL LLLineEditor::getPreeditLocation(S32 query_offset, LLCoordGL *coord, LLRect
 		LLRect preedit_rect_local(preedit_left_local, getRect().getHeight(), preedit_right_local, 0);
 		LLRect preedit_rect_screen;
 		localRectToScreen(preedit_rect_local, &preedit_rect_screen);
-		LLUI::screenRectToGL(preedit_rect_screen, bounds);
+		LLUI::getInstance()->screenRectToGL(preedit_rect_screen, bounds);
 	}
 
 	return TRUE;
diff --git a/indra/llui/llmenugl.cpp b/indra/llui/llmenugl.cpp
index 92543b952e..200dd2fdca 100644
--- a/indra/llui/llmenugl.cpp
+++ b/indra/llui/llmenugl.cpp
@@ -3263,7 +3263,7 @@ void LLMenuGL::showPopup(LLView* spawning_view, LLMenuGL* menu, S32 x, S32 y)
 	menu->needsArrange();
 	menu->arrangeAndClear();
 
-	LLUI::getMousePositionLocal(menu->getParent(), &mouse_x, &mouse_y);
+	LLUI::getInstance()->getMousePositionLocal(menu->getParent(), &mouse_x, &mouse_y);
 	LLMenuHolderGL::sContextMenuSpawnPos.set(mouse_x,mouse_y);
 
 	const LLRect menu_region_rect = LLMenuGL::sMenuContainer->getRect();
diff --git a/indra/llui/llmodaldialog.cpp b/indra/llui/llmodaldialog.cpp
index 8cf88ad5eb..5cfa8ea973 100644
--- a/indra/llui/llmodaldialog.cpp
+++ b/indra/llui/llmodaldialog.cpp
@@ -105,7 +105,7 @@ void LLModalDialog::onOpen(const LLSD& key)
 	
 		// This is a modal dialog.  It sucks up all mouse and keyboard operations.
 		gFocusMgr.setMouseCapture( this );
-		LLUI::addPopup(this);
+		LLUI::getInstance()->addPopup(this);
 		setFocus(TRUE);
 
 		sModalStack.push_front( this );
@@ -147,7 +147,7 @@ void LLModalDialog::setVisible( BOOL visible )
 			gFocusMgr.setMouseCapture( this );
 
 			// The dialog view is a root view
-			LLUI::addPopup(this);
+			LLUI::getInstance()->addPopup(this);
 			setFocus( TRUE );
 		}
 		else
@@ -165,7 +165,7 @@ BOOL LLModalDialog::handleMouseDown(S32 x, S32 y, MASK mask)
 	if (popup_menu != NULL)
 	{
 		S32 mx, my;
-		LLUI::getMousePositionScreen(&mx, &my);
+		LLUI::getInstance()->getMousePositionScreen(&mx, &my);
 		LLRect menu_screen_rc = popup_menu->calcScreenRect();
 		if(!menu_screen_rc.pointInRect(mx, my))
 		{
@@ -202,7 +202,7 @@ BOOL LLModalDialog::handleHover(S32 x, S32 y, MASK mask)
 	if (popup_menu != NULL)
 	{
 		S32 mx, my;
-		LLUI::getMousePositionScreen(&mx, &my);
+		LLUI::getInstance()->getMousePositionScreen(&mx, &my);
 		LLRect menu_screen_rc = popup_menu->calcScreenRect();
 		if(menu_screen_rc.pointInRect(mx, my))
 		{
@@ -286,7 +286,7 @@ void LLModalDialog::draw()
 
 void LLModalDialog::centerOnScreen()
 {
-	LLVector2 window_size = LLUI::getWindowSize();
+	LLVector2 window_size = LLUI::getInstance()->getWindowSize();
 	centerWithin(LLRect(0, 0, ll_round(window_size.mV[VX]), ll_round(window_size.mV[VY])));
 }
 
@@ -316,7 +316,7 @@ void LLModalDialog::onAppFocusGained()
 		// This is a modal dialog.  It sucks up all mouse and keyboard operations.
 		gFocusMgr.setMouseCapture( instance );
 		instance->setFocus(TRUE);
-		LLUI::addPopup(instance);
+		LLUI::getInstance()->addPopup(instance);
 
 		instance->centerOnScreen();
 	}
diff --git a/indra/llui/llnotifications.cpp b/indra/llui/llnotifications.cpp
index 7bafd711cb..9fc6c05ead 100644
--- a/indra/llui/llnotifications.cpp
+++ b/indra/llui/llnotifications.cpp
@@ -130,7 +130,7 @@ bool handleIgnoredNotification(const LLSD& payload)
 			response = pNotif->getResponseTemplate(LLNotification::WITH_DEFAULT_BUTTON);
 			break;
 		case LLNotificationForm::IGNORE_WITH_LAST_RESPONSE:
-			response = LLUI::sSettingGroups["ignores"]->getLLSD("Default" + pNotif->getName());
+			response = LLUI::getInstance()->mSettingGroups["ignores"]->getLLSD("Default" + pNotif->getName());
 			break;
 		case LLNotificationForm::IGNORE_SHOW_AGAIN:
 			break;
@@ -197,6 +197,7 @@ LLNotificationForm::LLNotificationForm(const std::string& name, const LLNotifica
 	{
 		mIgnoreMsg = p.ignore.text;
 
+		LLUI *ui_inst = LLUI::getInstance();
 		if (!p.ignore.save_option)
 		{
 			mIgnore = p.ignore.session_only ? IGNORE_WITH_DEFAULT_RESPONSE_SESSION_ONLY : IGNORE_WITH_DEFAULT_RESPONSE;
@@ -205,19 +206,19 @@ LLNotificationForm::LLNotificationForm(const std::string& name, const LLNotifica
 		{
 			// remember last option chosen by user and automatically respond with that in the future
 			mIgnore = IGNORE_WITH_LAST_RESPONSE;
-			LLUI::sSettingGroups["ignores"]->declareLLSD(std::string("Default") + name, "", std::string("Default response for notification " + name));
+			ui_inst->mSettingGroups["ignores"]->declareLLSD(std::string("Default") + name, "", std::string("Default response for notification " + name));
 		}
 
 		BOOL show_notification = TRUE;
 		if (p.ignore.control.isProvided())
 		{
-			mIgnoreSetting = LLUI::sSettingGroups["config"]->getControl(p.ignore.control);
+			mIgnoreSetting = ui_inst->mSettingGroups["config"]->getControl(p.ignore.control);
 			mInvertSetting = p.ignore.invert_control;
 		}
 		else
 		{
-			LLUI::sSettingGroups["ignores"]->declareBOOL(name, show_notification, "Show notification with this name", LLControlVariable::PERSIST_NONDFT);
-			mIgnoreSetting = LLUI::sSettingGroups["ignores"]->getControl(name);
+			ui_inst->mSettingGroups["ignores"]->declareBOOL(name, show_notification, "Show notification with this name", LLControlVariable::PERSIST_NONDFT);
+			mIgnoreSetting = ui_inst->mSettingGroups["ignores"]->getControl(name);
 		}
 	}
 
@@ -432,7 +433,7 @@ LLNotificationTemplate::LLNotificationTemplate(const LLNotificationTemplate::Par
     mSoundName("")
 {
 	if (p.sound.isProvided()
-		&& LLUI::sSettingGroups["config"]->controlExists(p.sound))
+		&& LLUI::getInstance()->mSettingGroups["config"]->controlExists(p.sound))
 	{
 		mSoundName = p.sound;
 	}
@@ -700,7 +701,7 @@ void LLNotification::respond(const LLSD& response)
 		mForm->setIgnored(mIgnored);
 		if (mIgnored && mForm->getIgnoreType() == LLNotificationForm::IGNORE_WITH_LAST_RESPONSE)
 		{
-			LLUI::sSettingGroups["ignores"]->setLLSD("Default" + getName(), response);
+			LLUI::getInstance()->mSettingGroups["ignores"]->setLLSD("Default" + getName(), response);
 		}
 	}
 
diff --git a/indra/llui/llpanel.cpp b/indra/llui/llpanel.cpp
index ee90574161..00da0f5fec 100644
--- a/indra/llui/llpanel.cpp
+++ b/indra/llui/llpanel.cpp
@@ -609,7 +609,7 @@ std::string LLPanel::getString(const std::string& name, const LLStringUtil::form
 		return formatted_string.getString();
 	}
 	std::string err_str("Failed to find string " + name + " in panel " + getName()); //*TODO: Translate
-	if(LLUI::sSettingGroups["config"]->getBOOL("QAMode"))
+	if(LLUI::getInstance()->mSettingGroups["config"]->getBOOL("QAMode"))
 	{
 		LL_ERRS() << err_str << LL_ENDL;
 	}
@@ -628,7 +628,7 @@ std::string LLPanel::getString(const std::string& name) const
 		return found_it->second;
 	}
 	std::string err_str("Failed to find string " + name + " in panel " + getName()); //*TODO: Translate
-	if(LLUI::sSettingGroups["config"]->getBOOL("QAMode"))
+	if(LLUI::getInstance()->mSettingGroups["config"]->getBOOL("QAMode"))
 	{
 		LL_ERRS() << err_str << LL_ENDL;
 	}
diff --git a/indra/llui/llscrollbar.cpp b/indra/llui/llscrollbar.cpp
index 76134144a0..b3a79bc1eb 100644
--- a/indra/llui/llscrollbar.cpp
+++ b/indra/llui/llscrollbar.cpp
@@ -84,7 +84,7 @@ LLScrollbar::LLScrollbar(const Params & p)
 		mThumbImageH(p.thumb_image_horizontal),
 		mTrackImageV(p.track_image_vertical),
 		mTrackImageH(p.track_image_horizontal),
-		mThickness(p.thickness.isProvided() ? p.thickness : LLUI::sSettingGroups["config"]->getS32("UIScrollbarSize")),
+		mThickness(p.thickness.isProvided() ? p.thickness : LLUI::getInstance()->mSettingGroups["config"]->getS32("UIScrollbarSize")),
 		mBGVisible(p.bg_visible),
 		mBGColor(p.bg_color)
 {
@@ -488,7 +488,7 @@ void LLScrollbar::draw()
 
 	S32 local_mouse_x;
 	S32 local_mouse_y;
-	LLUI::getMousePositionLocal(this, &local_mouse_x, &local_mouse_y);
+	LLUI::getInstance()->getMousePositionLocal(this, &local_mouse_x, &local_mouse_y);
 	BOOL other_captor = gFocusMgr.getMouseCapture() && gFocusMgr.getMouseCapture() != this;
 	BOOL hovered = getEnabled() && !other_captor && (hasMouseCapture() || mThumbRect.pointInRect(local_mouse_x, local_mouse_y));
 	if (hovered)
@@ -645,5 +645,5 @@ void LLScrollbar::onLineDownBtnPressed( const LLSD& data )
 
 void LLScrollbar::setThickness(S32 thickness)
 {
-	mThickness = thickness < 0 ? LLUI::sSettingGroups["config"]->getS32("UIScrollbarSize") : thickness;
+	mThickness = thickness < 0 ? LLUI::getInstance()->mSettingGroups["config"]->getS32("UIScrollbarSize") : thickness;
 }
diff --git a/indra/llui/llspellcheck.cpp b/indra/llui/llspellcheck.cpp
index 7f64743e99..296ea09079 100644
--- a/indra/llui/llspellcheck.cpp
+++ b/indra/llui/llspellcheck.cpp
@@ -44,7 +44,6 @@ static const std::string DICT_FILE_IGNORE = "user_ignore.dic";
 static const std::string DICT_FILE_MAIN = "dictionaries.xml";
 static const std::string DICT_FILE_USER = "user_dictionaries.xml";
 
-LLSD LLSpellChecker::sDictMap;
 LLSpellChecker::settings_change_signal_t LLSpellChecker::sSettingsChangeSignal;
 
 LLSpellChecker::LLSpellChecker()
@@ -94,10 +93,9 @@ S32 LLSpellChecker::getSuggestions(const std::string& word, std::vector<std::str
 	return suggestions.size();
 }
 
-// static
 const LLSD LLSpellChecker::getDictionaryData(const std::string& dict_language)
 {
-	for (LLSD::array_const_iterator it = sDictMap.beginArray(); it != sDictMap.endArray(); ++it)
+	for (LLSD::array_const_iterator it = mDictMap.beginArray(); it != mDictMap.endArray(); ++it)
 	{
 		const LLSD& dict_entry = *it;
 		if (dict_language == dict_entry["language"].asString())
@@ -108,14 +106,12 @@ const LLSD LLSpellChecker::getDictionaryData(const std::string& dict_language)
 	return LLSD();
 }
 
-// static
 bool LLSpellChecker::hasDictionary(const std::string& dict_language, bool check_installed)
 {
 	const LLSD dict_info = getDictionaryData(dict_language);
 	return dict_info.has("language") && ( (!check_installed) || (dict_info["installed"].asBoolean()) );
 }
 
-// static
 void LLSpellChecker::setDictionaryData(const LLSD& dict_info)
 {
 	const std::string dict_language = dict_info["language"].asString();
@@ -124,7 +120,7 @@ void LLSpellChecker::setDictionaryData(const LLSD& dict_info)
 		return;
 	}
 
-	for (LLSD::array_iterator it = sDictMap.beginArray(); it != sDictMap.endArray(); ++it)
+	for (LLSD::array_iterator it = mDictMap.beginArray(); it != mDictMap.endArray(); ++it)
 	{
 		LLSD& dict_entry = *it;
 		if (dict_language == dict_entry["language"].asString())
@@ -133,7 +129,7 @@ void LLSpellChecker::setDictionaryData(const LLSD& dict_info)
 			return;
 		}
 	}
-	sDictMap.append(dict_info);
+	mDictMap.append(dict_info);
 	return;
 }
 
@@ -147,14 +143,14 @@ void LLSpellChecker::refreshDictionaryMap()
     std::string user_filename(user_path + DICT_FILE_MAIN);
 	llifstream user_file(user_filename.c_str(), std::ios::binary);
 	if ( (!user_file.is_open()) 
-		|| (LLSDParser::PARSE_FAILURE == LLSDSerialize::fromXMLDocument(sDictMap, user_file)) 
-		|| (0 == sDictMap.size()) )
+		|| (LLSDParser::PARSE_FAILURE == LLSDSerialize::fromXMLDocument(mDictMap, user_file)) 
+		|| (0 == mDictMap.size()) )
 	{
         std::string app_filename(app_path + DICT_FILE_MAIN);
 		llifstream app_file(app_filename.c_str(), std::ios::binary);
 		if ( (!app_file.is_open()) 
-			|| (LLSDParser::PARSE_FAILURE == LLSDSerialize::fromXMLDocument(sDictMap, app_file)) 
-			|| (0 == sDictMap.size()) )
+			|| (LLSDParser::PARSE_FAILURE == LLSDSerialize::fromXMLDocument(mDictMap, app_file)) 
+			|| (0 == mDictMap.size()) )
 		{
 			return;
 		}
@@ -178,7 +174,7 @@ void LLSpellChecker::refreshDictionaryMap()
 
 	// Look for installed dictionaries
 	std::string tmp_app_path, tmp_user_path;
-	for (LLSD::array_iterator it = sDictMap.beginArray(); it != sDictMap.endArray(); ++it)
+	for (LLSD::array_iterator it = mDictMap.beginArray(); it != mDictMap.endArray(); ++it)
 	{
 		LLSD& sdDict = *it;
 		tmp_app_path = (sdDict.has("name")) ? app_path + sdDict["name"].asString() : LLStringUtil::null;
@@ -416,7 +412,6 @@ bool LLSpellChecker::getUseSpellCheck()
 	return (LLSpellChecker::instanceExists()) && (LLSpellChecker::instance().mHunspell);
 }
 
-// static
 bool LLSpellChecker::canRemoveDictionary(const std::string& dict_language)
 {
 	// Only user-installed inactive dictionaries can be removed
@@ -426,7 +421,6 @@ bool LLSpellChecker::canRemoveDictionary(const std::string& dict_language)
 		( (!getUseSpellCheck()) || (!LLSpellChecker::instance().isActiveDictionary(dict_language)) );
 }
 
-// static
 void LLSpellChecker::removeDictionary(const std::string& dict_language)
 {
 	if (!canRemoveDictionary(dict_language))
@@ -499,12 +493,3 @@ void LLSpellChecker::setUseSpellCheck(const std::string& dict_language)
 		LLSpellChecker::instance().initHunspell(dict_language);
 	}
 }
-
-// static
-void LLSpellChecker::initClass()
-{
-	if (sDictMap.isUndefined())
-	{
-		refreshDictionaryMap();
-	}
-}
diff --git a/indra/llui/llspellcheck.h b/indra/llui/llspellcheck.h
index acac589e43..f1964cc091 100644
--- a/indra/llui/llspellcheck.h
+++ b/indra/llui/llspellcheck.h
@@ -34,10 +34,9 @@
 
 class Hunspell;
 
-class LLSpellChecker : public LLSingleton<LLSpellChecker>, public LLInitClass<LLSpellChecker>
+class LLSpellChecker : public LLSingleton<LLSpellChecker>
 {
 	LLSINGLETON(LLSpellChecker);
-	friend class LLInitClass<LLSpellChecker>;
 	~LLSpellChecker();
 
 public:
@@ -57,26 +56,24 @@ public:
 	bool				isActiveDictionary(const std::string& dict_language) const;
 	void				setSecondaryDictionaries(dict_list_t dict_list);
 
-	static bool				 canRemoveDictionary(const std::string& dict_language);
+	bool					 canRemoveDictionary(const std::string& dict_language);
 	static const std::string getDictionaryAppPath();
 	static const std::string getDictionaryUserPath();
-	static const LLSD		 getDictionaryData(const std::string& dict_language);
-	static const LLSD&		 getDictionaryMap() { return sDictMap; }
+	const LLSD				 getDictionaryData(const std::string& dict_language);
+	const LLSD&				 getDictionaryMap() { return mDictMap; }
 	static bool				 getUseSpellCheck();
-	static bool				 hasDictionary(const std::string& dict_language, bool check_installed = false);
-	static void				 refreshDictionaryMap();
-	static void				 removeDictionary(const std::string& dict_language);
+	bool					 hasDictionary(const std::string& dict_language, bool check_installed = false);
+	void					 refreshDictionaryMap();
+	void					 removeDictionary(const std::string& dict_language);
 	static void				 setUseSpellCheck(const std::string& dict_language);
 protected:
 	static LLSD				 loadUserDictionaryMap();
-	static void				 setDictionaryData(const LLSD& dict_info);
+	void					 setDictionaryData(const LLSD& dict_info);
 	static void				 saveUserDictionaryMap(const LLSD& dict_map);
 
 public:
 	typedef boost::signals2::signal<void()> settings_change_signal_t;
 	static boost::signals2::connection setSettingsChangeCallback(const settings_change_signal_t::slot_type& cb);
-protected:
-	static void initClass();
 
 protected:
 	Hunspell*	mHunspell;
@@ -84,8 +81,8 @@ protected:
 	std::string	mDictFile;
 	dict_list_t	mDictSecondary;
 	std::vector<std::string> mIgnoreList;
+	LLSD mDictMap;
 
-	static LLSD						sDictMap;
 	static settings_change_signal_t	sSettingsChangeSignal;
 };
 
diff --git a/indra/llui/llstatview.cpp b/indra/llui/llstatview.cpp
index eda2d6047f..bb4969c81f 100644
--- a/indra/llui/llstatview.cpp
+++ b/indra/llui/llstatview.cpp
@@ -43,7 +43,7 @@ LLStatView::LLStatView(const LLStatView::Params& p)
 	BOOL isopen = getDisplayChildren();
 	if (mSetting.length() > 0)
 	{
-		isopen = LLUI::sSettingGroups["config"]->getBOOL(mSetting);
+		isopen = LLUI::getInstance()->mSettingGroups["config"]->getBOOL(mSetting);
 	}
 	setDisplayChildren(isopen);
 }
@@ -54,7 +54,7 @@ LLStatView::~LLStatView()
 	if (mSetting.length() > 0)
 	{
 		BOOL isopen = getDisplayChildren();
-		LLUI::sSettingGroups["config"]->setBOOL(mSetting, isopen);
+		LLUI::getInstance()->mSettingGroups["config"]->setBOOL(mSetting, isopen);
 	}
 }
 
diff --git a/indra/llui/lltextbase.cpp b/indra/llui/lltextbase.cpp
index 4505e3d572..10494b8877 100644
--- a/indra/llui/lltextbase.cpp
+++ b/indra/llui/lltextbase.cpp
@@ -3258,7 +3258,7 @@ BOOL LLNormalTextSegment::handleHover(S32 x, S32 y, MASK mask)
 		// Only process the click if it's actually in this segment, not to the right of the end-of-line.
 		if(mEditor.getSegmentAtLocalPos(x, y, false) == this)
 		{
-			LLUI::getWindow()->setCursor(UI_CURSOR_HAND);
+			LLUI::getInstance()->getWindow()->setCursor(UI_CURSOR_HAND);
 			return TRUE;
 		}
 	}
diff --git a/indra/llui/lltextbox.cpp b/indra/llui/lltextbox.cpp
index 9faff1278d..0afd32f332 100644
--- a/indra/llui/lltextbox.cpp
+++ b/indra/llui/lltextbox.cpp
@@ -107,7 +107,7 @@ BOOL LLTextBox::handleHover(S32 x, S32 y, MASK mask)
 	if (!handled && mClickedCallback && mShowCursorHand)
 	{
 		// Clickable text boxes change the cursor to a hand
-		LLUI::getWindow()->setCursor(UI_CURSOR_HAND);
+		LLUI::getInstance()->getWindow()->setCursor(UI_CURSOR_HAND);
 		return TRUE;
 	}
 	return handled;
diff --git a/indra/llui/lltexteditor.cpp b/indra/llui/lltexteditor.cpp
index 137167db2a..b1f8b00cab 100644
--- a/indra/llui/lltexteditor.cpp
+++ b/indra/llui/lltexteditor.cpp
@@ -1045,7 +1045,7 @@ void LLTextEditor::removeCharOrTab()
 	}
 	else
 	{
-		LLUI::reportBadKeystroke();
+		LLUI::getInstance()->reportBadKeystroke();
 	}
 }
 
@@ -1068,7 +1068,7 @@ void LLTextEditor::removeChar()
 	}
 	else
 	{
-		LLUI::reportBadKeystroke();
+		LLUI::getInstance()->reportBadKeystroke();
 	}
 }
 
@@ -1315,7 +1315,7 @@ BOOL LLTextEditor::handleNavigationKey(const KEY key, const MASK mask)
 				}
 				else
 				{
-					LLUI::reportBadKeystroke();
+					LLUI::getInstance()->reportBadKeystroke();
 				}
 			}
 			break;
@@ -1333,7 +1333,7 @@ BOOL LLTextEditor::handleNavigationKey(const KEY key, const MASK mask)
 				}
 				else
 				{
-					LLUI::reportBadKeystroke();
+					LLUI::getInstance()->reportBadKeystroke();
 				}
 			}	
 			break;
@@ -1665,7 +1665,7 @@ BOOL LLTextEditor::handleSpecialKey(const KEY key, const MASK mask)
 		}
 		else
 		{
-			LLUI::reportBadKeystroke();
+			LLUI::getInstance()->reportBadKeystroke();
 		}
 		break;
 
@@ -2750,7 +2750,7 @@ BOOL LLTextEditor::getPreeditLocation(S32 query_offset, LLCoordGL *coord, LLRect
 	{
 		LLRect control_rect_screen;
 		localRectToScreen(mVisibleTextRect, &control_rect_screen);
-		LLUI::screenRectToGL(control_rect_screen, control);
+		LLUI::getInstance()->screenRectToGL(control_rect_screen, control);
 	}
 
 	S32 preedit_left_position, preedit_right_position;
@@ -2804,7 +2804,7 @@ BOOL LLTextEditor::getPreeditLocation(S32 query_offset, LLCoordGL *coord, LLRect
 		const S32 query_y = mVisibleTextRect.mTop - (current_line - first_visible_line) * line_height - line_height / 2;
 		S32 query_screen_x, query_screen_y;
 		localPointToScreen(query_x, query_y, &query_screen_x, &query_screen_y);
-		LLUI::screenPointToGL(query_screen_x, query_screen_y, &coord->mX, &coord->mY);
+		LLUI::getInstance()->screenPointToGL(query_screen_x, query_screen_y, &coord->mX, &coord->mY);
 	}
 
 	if (bounds)
@@ -2831,7 +2831,7 @@ BOOL LLTextEditor::getPreeditLocation(S32 query_offset, LLCoordGL *coord, LLRect
 		const LLRect preedit_rect_local(preedit_left, preedit_top, preedit_right, preedit_bottom);
 		LLRect preedit_rect_screen;
 		localRectToScreen(preedit_rect_local, &preedit_rect_screen);
-		LLUI::screenRectToGL(preedit_rect_screen, bounds);
+		LLUI::getInstance()->screenRectToGL(preedit_rect_screen, bounds);
 	}
 
 	return TRUE;
diff --git a/indra/llui/lltextutil.cpp b/indra/llui/lltextutil.cpp
index f6b2ee1dc0..538508b856 100644
--- a/indra/llui/lltextutil.cpp
+++ b/indra/llui/lltextutil.cpp
@@ -78,7 +78,7 @@ void LLTextUtil::textboxSetGreyedVal(LLTextBox *txtbox, const LLStyle::Params& n
 
 const std::string& LLTextUtil::formatPhoneNumber(const std::string& phone_str)
 {
-	static const std::string PHONE_SEPARATOR = LLUI::sSettingGroups["config"]->getString("AvalinePhoneSeparator");
+	static const std::string PHONE_SEPARATOR = LLUI::getInstance()->mSettingGroups["config"]->getString("AvalinePhoneSeparator");
 	static const S32 PHONE_PART_LEN = 2;
 
 	static std::string formatted_phone_str;
diff --git a/indra/llui/lltoggleablemenu.cpp b/indra/llui/lltoggleablemenu.cpp
index ccb92ffbb2..3e56e0a589 100644
--- a/indra/llui/lltoggleablemenu.cpp
+++ b/indra/llui/lltoggleablemenu.cpp
@@ -55,7 +55,7 @@ boost::signals2::connection LLToggleableMenu::setVisibilityChangeCallback(const
 void LLToggleableMenu::onVisibilityChange (BOOL curVisibilityIn)
 {
 	S32 x,y;
-	LLUI::getMousePositionLocal(LLUI::getRootView(), &x, &y);
+	LLUI::getInstance()->getMousePositionLocal(LLUI::getInstance()->getRootView(), &x, &y);
 
 	// STORM-1879: also check MouseCapture to see if the button was really
         // clicked (otherwise the VisibilityChange was triggered via keyboard shortcut)
diff --git a/indra/llui/lltoolbar.cpp b/indra/llui/lltoolbar.cpp
index abc2b6e9ca..e6f466ec78 100644
--- a/indra/llui/lltoolbar.cpp
+++ b/indra/llui/lltoolbar.cpp
@@ -1125,7 +1125,7 @@ BOOL LLToolBarButton::handleHover(S32 x, S32 y, MASK mask)
 	BOOL handled = FALSE;
 		
 	S32 mouse_distance_squared = (x - mMouseDownX) * (x - mMouseDownX) + (y - mMouseDownY) * (y - mMouseDownY);
-	S32 drag_threshold = LLUI::sSettingGroups["config"]->getS32("DragAndDropDistanceThreshold");
+	S32 drag_threshold = LLUI::getInstance()->mSettingGroups["config"]->getS32("DragAndDropDistanceThreshold");
 	if (mouse_distance_squared > drag_threshold * drag_threshold
 		&& hasMouseCapture() && 
 		mStartDragItemCallback && mHandleDragItemCallback)
diff --git a/indra/llui/lltooltip.cpp b/indra/llui/lltooltip.cpp
index 698b128d45..422534b781 100644
--- a/indra/llui/lltooltip.cpp
+++ b/indra/llui/lltooltip.cpp
@@ -145,10 +145,10 @@ LLToolTip::Params::Params()
 	wrap("wrap", true),
 	pos("pos"),
 	message("message"),
-	delay_time("delay_time", LLUI::sSettingGroups["config"]->getF32( "ToolTipDelay" )),
-	visible_time_over("visible_time_over", LLUI::sSettingGroups["config"]->getF32( "ToolTipVisibleTimeOver" )),
-	visible_time_near("visible_time_near", LLUI::sSettingGroups["config"]->getF32( "ToolTipVisibleTimeNear" )),
-	visible_time_far("visible_time_far", LLUI::sSettingGroups["config"]->getF32( "ToolTipVisibleTimeFar" )),
+	delay_time("delay_time", LLUI::getInstance()->mSettingGroups["config"]->getF32( "ToolTipDelay" )),
+	visible_time_over("visible_time_over", LLUI::getInstance()->mSettingGroups["config"]->getF32( "ToolTipVisibleTimeOver" )),
+	visible_time_near("visible_time_near", LLUI::getInstance()->mSettingGroups["config"]->getF32( "ToolTipVisibleTimeNear" )),
+	visible_time_far("visible_time_far", LLUI::getInstance()->mSettingGroups["config"]->getF32( "ToolTipVisibleTimeFar" )),
 	sticky_rect("sticky_rect"),
 	image("image"),
 	text_color("text_color"),
@@ -358,7 +358,7 @@ void LLToolTip::draw()
 
 	if (mFadeTimer.getStarted())
 	{
-		F32 tool_tip_fade_time = LLUI::sSettingGroups["config"]->getF32("ToolTipFadeTime");
+		F32 tool_tip_fade_time = LLUI::getInstance()->mSettingGroups["config"]->getF32("ToolTipFadeTime");
 		alpha = clamp_rescale(mFadeTimer.getElapsedTimeF32(), 0.f, tool_tip_fade_time, 1.f, 0.f);
 		if (alpha == 0.f)
 		{
@@ -436,12 +436,12 @@ void LLToolTipMgr::createToolTip(const LLToolTip::Params& params)
 	{
 		LLCoordGL pos = params.pos;
 		// try to spawn at requested position
-		LLUI::positionViewNearMouse(mToolTip, pos.mX, pos.mY);
+		LLUI::getInstance()->positionViewNearMouse(mToolTip, pos.mX, pos.mY);
 	}
 	else
 	{
 		// just spawn at mouse location
-		LLUI::positionViewNearMouse(mToolTip);
+		LLUI::getInstance()->positionViewNearMouse(mToolTip);
 	}
 
 	//...update "sticky" rect and tooltip position
@@ -453,7 +453,7 @@ void LLToolTipMgr::createToolTip(const LLToolTip::Params& params)
 	{
 		S32 mouse_x;
 		S32 mouse_y;
-		LLUI::getMousePositionLocal(gToolTipView->getParent(), &mouse_x, &mouse_y);
+		LLUI::getInstance()->getMousePositionLocal(gToolTipView->getParent(), &mouse_x, &mouse_y);
 
 		// allow mouse a little bit of slop before changing tooltips
 		mMouseNearRect.setCenterAndSize(mouse_x, mouse_y, 3, 3);
@@ -491,7 +491,7 @@ void LLToolTipMgr::show(const LLToolTip::Params& params)
 	
 	// are we ready to show the tooltip?
 	if (!mToolTipsBlocked									// we haven't hit a key, moved the mouse, etc.
-		&& LLUI::getMouseIdleTime() > params_with_defaults.delay_time)	// the mouse has been still long enough
+		&& LLUI::getInstance()->getMouseIdleTime() > params_with_defaults.delay_time)	// the mouse has been still long enough
 	{
 		bool tooltip_changed = mLastToolTipParams.message() != params_with_defaults.message()
 								|| mLastToolTipParams.pos() != params_with_defaults.pos()
@@ -563,7 +563,7 @@ void LLToolTipMgr::updateToolTipVisibility()
 	}
 
 	// hide tooltips when mouse cursor is hidden
-	if (LLUI::getWindow()->isCursorHidden())
+	if (LLUI::getInstance()->getWindow()->isCursorHidden())
 	{
 		blockToolTips();
 		return;
@@ -574,7 +574,7 @@ void LLToolTipMgr::updateToolTipVisibility()
 	if (toolTipVisible())
 	{
 		S32 mouse_x, mouse_y;
-		LLUI::getMousePositionLocal(gToolTipView, &mouse_x, &mouse_y);
+		LLUI::getInstance()->getMousePositionLocal(gToolTipView, &mouse_x, &mouse_y);
 		
 		// mouse far away from tooltip
 		tooltip_timeout = mLastToolTipParams.visible_time_far;
diff --git a/indra/llui/lltransutil.cpp b/indra/llui/lltransutil.cpp
index b1534bb5e4..5da722a72b 100644
--- a/indra/llui/lltransutil.cpp
+++ b/indra/llui/lltransutil.cpp
@@ -44,6 +44,7 @@ bool LLTransUtil::parseStrings(const std::string& xml_filename, const std::set<s
 	bool success = LLUICtrlFactory::getLayeredXMLNode(xml_filename, root, LLDir::ALL_SKINS);
 	if (!success)
 	{
+		gDirUtilp->dumpCurrentDirectories(LLError::LEVEL_WARN);
 		LL_ERRS() << "Couldn't load string table " << xml_filename << ". Please reinstall viewer from  https://secondlife.com/support/downloads/ and contact https://support.secondlife.com if issue persists after reinstall." << LL_ENDL;
 		return false;
 	}
diff --git a/indra/llui/llui.cpp b/indra/llui/llui.cpp
index 52190a1473..656b69d3ed 100644
--- a/indra/llui/llui.cpp
+++ b/indra/llui/llui.cpp
@@ -75,19 +75,6 @@
 // Language for UI construction
 std::map<std::string, std::string> gTranslation;
 std::list<std::string> gUntranslated;
-/*static*/ LLUI::settings_map_t LLUI::sSettingGroups;
-/*static*/ LLUIAudioCallback LLUI::sAudioCallback = NULL;
-/*static*/ LLUIAudioCallback LLUI::sDeferredAudioCallback = NULL;
-/*static*/ LLWindow*		LLUI::sWindow = NULL;
-/*static*/ LLView*			LLUI::sRootView = NULL;
-/*static*/ BOOL                         LLUI::sDirty = FALSE;
-/*static*/ LLRect                       LLUI::sDirtyRect;
-/*static*/ LLHelp*			LLUI::sHelpImpl = NULL;
-/*static*/ std::vector<std::string> LLUI::sXUIPaths;
-/*static*/ LLFrameTimer		LLUI::sMouseIdleTimer;
-/*static*/ LLUI::add_popup_t	LLUI::sAddPopupFunc;
-/*static*/ LLUI::remove_popup_t	LLUI::sRemovePopupFunc;
-/*static*/ LLUI::clear_popups_t	LLUI::sClearPopupsFunc;
 
 // register filter editor here
 static LLDefaultChildRegistry::Register<LLFilterEditor> register_filter_editor("filter_editor");
@@ -106,18 +93,19 @@ LLUUID find_ui_sound(const char * namep)
 {
 	std::string name = ll_safe_string(namep);
 	LLUUID uuid = LLUUID(NULL);
-	if (!LLUI::sSettingGroups["config"]->controlExists(name))
+	LLUI *ui_inst = LLUI::getInstance();
+	if (!ui_inst->mSettingGroups["config"]->controlExists(name))
 	{
 		LL_WARNS() << "tried to make UI sound for unknown sound name: " << name << LL_ENDL;	
 	}
 	else
 	{
-		uuid = LLUUID(LLUI::sSettingGroups["config"]->getString(name));
+		uuid = LLUUID(ui_inst->mSettingGroups["config"]->getString(name));
 		if (uuid.isNull())
 		{
-			if (LLUI::sSettingGroups["config"]->getString(name) == LLUUID::null.asString())
+			if (ui_inst->mSettingGroups["config"]->getString(name) == LLUUID::null.asString())
 			{
-				if (LLUI::sSettingGroups["config"]->getBOOL("UISndDebugSpamToggle"))
+				if (ui_inst->mSettingGroups["config"]->getBOOL("UISndDebugSpamToggle"))
 				{
 					LL_INFOS() << "UI sound name: " << name << " triggered but silent (null uuid)" << LL_ENDL;	
 				}				
@@ -127,9 +115,9 @@ LLUUID find_ui_sound(const char * namep)
 				LL_WARNS() << "UI sound named: " << name << " does not translate to a valid uuid" << LL_ENDL;	
 			}
 		}
-		else if (LLUI::sAudioCallback != NULL)
+		else if (ui_inst->mAudioCallback != NULL)
 		{
-			if (LLUI::sSettingGroups["config"]->getBOOL("UISndDebugSpamToggle"))
+			if (ui_inst->mSettingGroups["config"]->getBOOL("UISndDebugSpamToggle"))
 			{
 				LL_INFOS() << "UI sound name: " << name << LL_ENDL;	
 			}
@@ -144,7 +132,7 @@ void make_ui_sound(const char* namep)
 	LLUUID soundUUID = find_ui_sound(namep);
 	if(soundUUID.notNull())
 	{
-		LLUI::sAudioCallback(soundUUID);
+		LLUI::getInstance()->mAudioCallback(soundUUID);
 	}
 }
 
@@ -153,30 +141,31 @@ void make_ui_sound_deferred(const char* namep)
 	LLUUID soundUUID = find_ui_sound(namep);
 	if(soundUUID.notNull())
 	{
-		LLUI::sDeferredAudioCallback(soundUUID);
+		LLUI::getInstance()->mDeferredAudioCallback(soundUUID);
 	}
 }
 
-void LLUI::initClass(const settings_map_t& settings,
-					 LLImageProviderInterface* image_provider,
-					 LLUIAudioCallback audio_callback,
-					 LLUIAudioCallback deferred_audio_callback,
-					 const LLVector2* scale_factor,
-					 const std::string& language)
+LLUI::LLUI(const settings_map_t& settings,
+				 LLImageProviderInterface* image_provider,
+				 LLUIAudioCallback audio_callback,
+				 LLUIAudioCallback deferred_audio_callback)
+: mSettingGroups(settings),
+mAudioCallback(audio_callback),
+mDeferredAudioCallback(deferred_audio_callback),
+mWindow(NULL), // set later in startup
+mRootView(NULL),
+mDirty(FALSE),
+mHelpImpl(NULL)
 {
-	LLRender2D::initClass(image_provider,scale_factor);
-	sSettingGroups = settings;
+	LLRender2D::initParamSingleton(image_provider);
 
-	if ((get_ptr_in_map(sSettingGroups, std::string("config")) == NULL) ||
-		(get_ptr_in_map(sSettingGroups, std::string("floater")) == NULL) ||
-		(get_ptr_in_map(sSettingGroups, std::string("ignores")) == NULL))
+	if ((get_ptr_in_map(mSettingGroups, std::string("config")) == NULL) ||
+		(get_ptr_in_map(mSettingGroups, std::string("floater")) == NULL) ||
+		(get_ptr_in_map(mSettingGroups, std::string("ignores")) == NULL))
 	{
 		LL_ERRS() << "Failure to initialize configuration groups" << LL_ENDL;
 	}
 
-	sAudioCallback = audio_callback;
-	sDeferredAudioCallback = deferred_audio_callback;
-	sWindow = NULL; // set later in startup
 	LLFontGL::sShadowColor = LLUIColorTable::instance().getColor("ColorDropShadow");
 
 	LLUICtrl::CommitCallbackRegistry::Registrar& reg = LLUICtrl::CommitCallbackRegistry::defaultRegistrar();
@@ -207,33 +196,26 @@ void LLUI::initClass(const settings_map_t& settings,
 	LLCommandManager::load();
 }
 
-void LLUI::cleanupClass()
-{
-	SUBSYSTEM_CLEANUP(LLRender2D);
-}
-
 void LLUI::setPopupFuncs(const add_popup_t& add_popup, const remove_popup_t& remove_popup,  const clear_popups_t& clear_popups)
 {
-	sAddPopupFunc = add_popup;
-	sRemovePopupFunc = remove_popup;
-	sClearPopupsFunc = clear_popups;
+	mAddPopupFunc = add_popup;
+	mRemovePopupFunc = remove_popup;
+	mClearPopupsFunc = clear_popups;
 }
 
-//static
 void LLUI::dirtyRect(LLRect rect)
 {
-	if (!sDirty)
+	if (!mDirty)
 	{
-		sDirtyRect = rect;
-		sDirty = TRUE;
+		mDirtyRect = rect;
+		mDirty = TRUE;
 	}
 	else
 	{
-		sDirtyRect.unionWith(rect);
-	}		
+		mDirtyRect.unionWith(rect);
+	}
 }
- 
-//static 
+
 void LLUI::setMousePositionScreen(S32 x, S32 y)
 {
 #if defined(LL_DARWIN)
@@ -247,7 +229,6 @@ void LLUI::setMousePositionScreen(S32 x, S32 y)
 	LLView::getWindow()->setCursorPosition(LLCoordGL(screen_x, screen_y).convert());
 }
 
-//static 
 void LLUI::getMousePositionScreen(S32 *x, S32 *y)
 {
 	LLCoordWindow cursor_pos_window;
@@ -257,7 +238,6 @@ void LLUI::getMousePositionScreen(S32 *x, S32 *y)
 	*y = ll_round((F32)cursor_pos_gl.mY / getScaleFactor().mV[VY]);
 }
 
-//static 
 void LLUI::setMousePositionLocal(const LLView* viewp, S32 x, S32 y)
 {
 	S32 screen_x, screen_y;
@@ -266,7 +246,6 @@ void LLUI::setMousePositionLocal(const LLView* viewp, S32 x, S32 y)
 	setMousePositionScreen(screen_x, screen_y);
 }
 
-//static 
 void LLUI::getMousePositionLocal(const LLView* viewp, S32 *x, S32 *y)
 {
 	S32 screen_x, screen_y;
@@ -280,20 +259,19 @@ void LLUI::getMousePositionLocal(const LLView* viewp, S32 *x, S32 *y)
 // or on Windows if the SecondLife.exe executable is run directly, the 
 // language follows the OS language.  In all cases the user can override
 // the language manually in preferences. JC
-// static
-std::string LLUI::getLanguage()
+std::string LLUI::getUILanguage()
 {
 	std::string language = "en";
-	if (sSettingGroups["config"])
+	if (mSettingGroups["config"])
 	{
-		language = sSettingGroups["config"]->getString("Language");
+		language = mSettingGroups["config"]->getString("Language");
 		if (language.empty() || language == "default")
 		{
-			language = sSettingGroups["config"]->getString("InstallLanguage");
+			language = mSettingGroups["config"]->getString("InstallLanguage");
 		}
 		if (language.empty() || language == "default")
 		{
-			language = sSettingGroups["config"]->getString("SystemLanguage");
+			language = mSettingGroups["config"]->getString("SystemLanguage");
 		}
 		if (language.empty() || language == "default")
 		{
@@ -303,6 +281,13 @@ std::string LLUI::getLanguage()
 	return language;
 }
 
+// static
+std::string LLUI::getLanguage()
+{
+    // Note: lldateutil_test redefines this function
+    return LLUI::getInstance()->getUILanguage();
+}
+
 struct SubDir : public LLInitParam::Block<SubDir>
 {
 	Mandatory<std::string> value;
@@ -362,37 +347,32 @@ std::string LLUI::locateSkin(const std::string& filename)
 	return "";
 }
 
-//static
 LLVector2 LLUI::getWindowSize()
 {
 	LLCoordWindow window_rect;
-	sWindow->getSize(&window_rect);
+	mWindow->getSize(&window_rect);
 
 	return LLVector2(window_rect.mX / getScaleFactor().mV[VX], window_rect.mY / getScaleFactor().mV[VY]);
 }
 
-//static
 void LLUI::screenPointToGL(S32 screen_x, S32 screen_y, S32 *gl_x, S32 *gl_y)
 {
 	*gl_x = ll_round((F32)screen_x * getScaleFactor().mV[VX]);
 	*gl_y = ll_round((F32)screen_y * getScaleFactor().mV[VY]);
 }
 
-//static
 void LLUI::glPointToScreen(S32 gl_x, S32 gl_y, S32 *screen_x, S32 *screen_y)
 {
 	*screen_x = ll_round((F32)gl_x / getScaleFactor().mV[VX]);
 	*screen_y = ll_round((F32)gl_y / getScaleFactor().mV[VY]);
 }
 
-//static
 void LLUI::screenRectToGL(const LLRect& screen, LLRect *gl)
 {
 	screenPointToGL(screen.mLeft, screen.mTop, &gl->mLeft, &gl->mTop);
 	screenPointToGL(screen.mRight, screen.mBottom, &gl->mRight, &gl->mBottom);
 }
 
-//static
 void LLUI::glRectToScreen(const LLRect& gl, LLRect *screen)
 {
 	glPointToScreen(gl.mLeft, gl.mTop, &screen->mLeft, &screen->mTop);
@@ -402,8 +382,8 @@ void LLUI::glRectToScreen(const LLRect& gl, LLRect *screen)
 
 LLControlGroup& LLUI::getControlControlGroup (const std::string& controlname)
 {
-	for (settings_map_t::iterator itor = sSettingGroups.begin();
-		 itor != sSettingGroups.end(); ++itor)
+	for (settings_map_t::iterator itor = mSettingGroups.begin();
+		 itor != mSettingGroups.end(); ++itor)
 	{
 		LLControlGroup* control_group = itor->second;
 		if(control_group != NULL)
@@ -413,43 +393,38 @@ LLControlGroup& LLUI::getControlControlGroup (const std::string& controlname)
 		}
 	}
 
-	return *sSettingGroups["config"]; // default group
+	return *mSettingGroups["config"]; // default group
 }
 
-//static 
 void LLUI::addPopup(LLView* viewp)
 {
-	if (sAddPopupFunc)
+	if (mAddPopupFunc)
 	{
-		sAddPopupFunc(viewp);
+		mAddPopupFunc(viewp);
 	}
 }
 
-//static 
 void LLUI::removePopup(LLView* viewp)
 {
-	if (sRemovePopupFunc)
+	if (mRemovePopupFunc)
 	{
-		sRemovePopupFunc(viewp);
+		mRemovePopupFunc(viewp);
 	}
 }
 
-//static
 void LLUI::clearPopups()
 {
-	if (sClearPopupsFunc)
+	if (mClearPopupsFunc)
 	{
-		sClearPopupsFunc();
+		mClearPopupsFunc();
 	}
 }
 
-//static
 void LLUI::reportBadKeystroke()
 {
 	make_ui_sound("UISndBadKeystroke");
 }
-	
-//static
+
 // spawn_x and spawn_y are top left corner of view in screen GL coordinates
 void LLUI::positionViewNearMouse(LLView* view, S32 spawn_x, S32 spawn_y)
 {
@@ -460,7 +435,7 @@ void LLUI::positionViewNearMouse(LLView* view, S32 spawn_x, S32 spawn_y)
 
 	S32 mouse_x;
 	S32 mouse_y;
-	LLUI::getMousePositionScreen(&mouse_x, &mouse_y);
+	getMousePositionScreen(&mouse_x, &mouse_y);
 
 	// If no spawn location provided, use mouse position
 	if (spawn_x == S32_MAX || spawn_y == S32_MAX)
diff --git a/indra/llui/llui.h b/indra/llui/llui.h
index d7151dbee9..e1c51deba9 100644
--- a/indra/llui/llui.h
+++ b/indra/llui/llui.h
@@ -109,8 +109,16 @@ class LLImageProviderInterface;
 
 typedef	void (*LLUIAudioCallback)(const LLUUID& uuid);
 
-class LLUI
+class LLUI : public LLParamSingleton<LLUI>
 {
+public:
+	typedef std::map<std::string, LLControlGroup*> settings_map_t;
+
+private:
+	LLSINGLETON(LLUI , const settings_map_t &settings,
+						   LLImageProviderInterface* image_provider,
+						   LLUIAudioCallback audio_callback,
+						   LLUIAudioCallback deferred_audio_callback);
 	LOG_CLASS(LLUI);
 public:
 	//
@@ -232,36 +240,24 @@ public:
 	//
 	// Methods
 	//
-	typedef std::map<std::string, LLControlGroup*> settings_map_t;
 	typedef boost::function<void(LLView*)> add_popup_t;
 	typedef boost::function<void(LLView*)> remove_popup_t;
 	typedef boost::function<void(void)> clear_popups_t;
 
-	static void initClass(const settings_map_t& settings,
-						  LLImageProviderInterface* image_provider,
-						  LLUIAudioCallback audio_callback = NULL,
-						  LLUIAudioCallback deferred_audio_callback = NULL,
-						  const LLVector2 *scale_factor = NULL,
-						  const std::string& language = LLStringUtil::null);
-	static void cleanupClass();
-	static void setPopupFuncs(const add_popup_t& add_popup, const remove_popup_t&, const clear_popups_t& );
-
-	static void pushMatrix() { LLRender2D::pushMatrix(); }
-	static void popMatrix() { LLRender2D::popMatrix(); }
-	static void loadIdentity() { LLRender2D::loadIdentity(); }
-	static void translate(F32 x, F32 y, F32 z = 0.0f) { LLRender2D::translate(x, y, z); }
+	void setPopupFuncs(const add_popup_t& add_popup, const remove_popup_t&, const clear_popups_t& );
 
-	static LLRect	sDirtyRect;
-	static BOOL		sDirty;
-	static void		dirtyRect(LLRect rect);
+	LLRect	mDirtyRect;
+	BOOL		mDirty;
+	void		dirtyRect(LLRect rect);
 
 	// Return the ISO639 language name ("en", "ko", etc.) for the viewer UI.
 	// http://www.loc.gov/standards/iso639-2/php/code_list.php
-	static std::string getLanguage();
+	std::string getUILanguage();
+	static std::string getLanguage(); // static for lldateutil_test compatibility
 
 	//helper functions (should probably move free standing rendering helper functions here)
-	static LLView* getRootView() { return sRootView; }
-	static void setRootView(LLView* view) { sRootView = view; }
+	LLView* getRootView() { return mRootView; }
+	void setRootView(LLView* view) { mRootView = view; }
 	/**
 	 * Walk the LLView tree to resolve a path
 	 * Paths can be discovered using Develop > XUI > Show XUI Paths
@@ -287,58 +283,65 @@ public:
 	 *      tree, the first "bar" anywhere under it, and "baz"
 	 *      as a direct child of that
 	 */
-	static const LLView* resolvePath(const LLView* context, const std::string& path);
-	static LLView* resolvePath(LLView* context, const std::string& path);
+	const LLView* resolvePath(const LLView* context, const std::string& path);
+	LLView* resolvePath(LLView* context, const std::string& path);
 	static std::string locateSkin(const std::string& filename);
-	static void setMousePositionScreen(S32 x, S32 y);
-	static void getMousePositionScreen(S32 *x, S32 *y);
-	static void setMousePositionLocal(const LLView* viewp, S32 x, S32 y);
-	static void getMousePositionLocal(const LLView* viewp, S32 *x, S32 *y);
-	static LLVector2& getScaleFactor() { return LLRender2D::sGLScaleFactor; }
-	static void setScaleFactor(const LLVector2& scale_factor) { LLRender2D::setScaleFactor(scale_factor); }
-	static void setLineWidth(F32 width) { LLRender2D::setLineWidth(width); }
-	static LLPointer<LLUIImage> getUIImageByID(const LLUUID& image_id, S32 priority = 0)
-		{ return LLRender2D::getUIImageByID(image_id, priority); }
-	static LLPointer<LLUIImage> getUIImage(const std::string& name, S32 priority = 0)
-		{ return LLRender2D::getUIImage(name, priority); }
-	static LLVector2 getWindowSize();
-	static void screenPointToGL(S32 screen_x, S32 screen_y, S32 *gl_x, S32 *gl_y);
-	static void glPointToScreen(S32 gl_x, S32 gl_y, S32 *screen_x, S32 *screen_y);
-	static void screenRectToGL(const LLRect& screen, LLRect *gl);
-	static void glRectToScreen(const LLRect& gl, LLRect *screen);
+	void setMousePositionScreen(S32 x, S32 y);
+	void getMousePositionScreen(S32 *x, S32 *y);
+	void setMousePositionLocal(const LLView* viewp, S32 x, S32 y);
+	void getMousePositionLocal(const LLView* viewp, S32 *x, S32 *y);
+	LLVector2 getWindowSize();
+	void screenPointToGL(S32 screen_x, S32 screen_y, S32 *gl_x, S32 *gl_y);
+	void glPointToScreen(S32 gl_x, S32 gl_y, S32 *screen_x, S32 *screen_y);
+	void screenRectToGL(const LLRect& screen, LLRect *gl);
+	void glRectToScreen(const LLRect& gl, LLRect *screen);
 	// Returns the control group containing the control name, or the default group
-	static LLControlGroup& getControlControlGroup (const std::string& controlname);
-	static F32 getMouseIdleTime() { return sMouseIdleTimer.getElapsedTimeF32(); }
-	static void resetMouseIdleTimer() { sMouseIdleTimer.reset(); }
-	static LLWindow* getWindow() { return sWindow; }
+	LLControlGroup& getControlControlGroup (const std::string& controlname);
+	F32 getMouseIdleTime() { return mMouseIdleTimer.getElapsedTimeF32(); }
+	void resetMouseIdleTimer() { mMouseIdleTimer.reset(); }
+	LLWindow* getWindow() { return mWindow; }
 
-	static void addPopup(LLView*);
-	static void removePopup(LLView*);
-	static void clearPopups();
+	void addPopup(LLView*);
+	void removePopup(LLView*);
+	void clearPopups();
 
-	static void reportBadKeystroke();
+	void reportBadKeystroke();
 
 	// Ensures view does not overlap mouse cursor, but is inside
 	// the view's parent rectangle.  Used for tooltips, inspectors.
 	// Optionally override the view's default X/Y, which are relative to the
 	// view's parent.
-	static void positionViewNearMouse(LLView* view,	S32 spawn_x = S32_MAX, S32 spawn_y = S32_MAX);
+	void positionViewNearMouse(LLView* view,	S32 spawn_x = S32_MAX, S32 spawn_y = S32_MAX);
+
+	// LLRender2D wrappers
+	static void pushMatrix() { LLRender2D::getInstance()->pushMatrix(); }
+	static void popMatrix() { LLRender2D::getInstance()->popMatrix(); }
+	static void loadIdentity() { LLRender2D::getInstance()->loadIdentity(); }
+	static void translate(F32 x, F32 y, F32 z = 0.0f) { LLRender2D::getInstance()->translate(x, y, z); }
+
+	static LLVector2& getScaleFactor() { return LLRender2D::getInstance()->mGLScaleFactor; }
+	static void setScaleFactor(const LLVector2& scale_factor) { LLRender2D::getInstance()->setScaleFactor(scale_factor); }
+	static void setLineWidth(F32 width) { LLRender2D::getInstance()->setLineWidth(width); }
+	static LLPointer<LLUIImage> getUIImageByID(const LLUUID& image_id, S32 priority = 0)
+		{ return LLRender2D::getInstance()->getUIImageByID(image_id, priority); }
+	static LLPointer<LLUIImage> getUIImage(const std::string& name, S32 priority = 0)
+		{ return LLRender2D::getInstance()->getUIImage(name, priority); }
 
 	//
 	// Data
 	//
-	static settings_map_t sSettingGroups;
-	static LLUIAudioCallback sAudioCallback;
-	static LLUIAudioCallback sDeferredAudioCallback;
-	static LLWindow*		sWindow;
-	static LLView*			sRootView;
-	static LLHelp*			sHelpImpl;
+	settings_map_t mSettingGroups;
+	LLUIAudioCallback mAudioCallback;
+	LLUIAudioCallback mDeferredAudioCallback;
+	LLWindow*		mWindow;
+	LLView*			mRootView;
+	LLHelp*			mHelpImpl;
 private:
-	static std::vector<std::string> sXUIPaths;
-	static LLFrameTimer		sMouseIdleTimer;
-	static add_popup_t		sAddPopupFunc;
-	static remove_popup_t	sRemovePopupFunc;
-	static clear_popups_t	sClearPopupsFunc;
+	std::vector<std::string> mXUIPaths;
+	LLFrameTimer		mMouseIdleTimer;
+	add_popup_t		mAddPopupFunc;
+	remove_popup_t	mRemovePopupFunc;
+	clear_popups_t	mClearPopupsFunc;
 };
 
 
@@ -363,7 +366,7 @@ public:
 	LLUICachedControl(const std::string& name,
 					  const T& default_value,
 					  const std::string& comment = "Declared In Code")
-	:	LLCachedControl<T>(LLUI::getControlControlGroup(name), name, default_value, comment)
+	:	LLCachedControl<T>(LLUI::getInstance()->getControlControlGroup(name), name, default_value, comment)
 	{}
 };
 
diff --git a/indra/llui/llurlentry.cpp b/indra/llui/llurlentry.cpp
index cd9b52d164..63ed427ab5 100644
--- a/indra/llui/llurlentry.cpp
+++ b/indra/llui/llurlentry.cpp
@@ -176,7 +176,7 @@ void LLUrlEntryBase::callObservers(const std::string &id,
 bool LLUrlEntryBase::isLinkDisabled() const
 {
 	// this allows us to have a global setting to turn off text hyperlink highlighting/action
-	bool globally_disabled = LLUI::sSettingGroups["config"]->getBOOL("DisableTextHyperlinkActions");
+	bool globally_disabled = LLUI::getInstance()->mSettingGroups["config"]->getBOOL("DisableTextHyperlinkActions");
 
 	return globally_disabled;
 }
diff --git a/indra/llui/llview.cpp b/indra/llui/llview.cpp
index 89ad8138d8..2a190365b3 100644
--- a/indra/llui/llview.cpp
+++ b/indra/llui/llview.cpp
@@ -816,7 +816,7 @@ LLView* LLView::childrenHandleHover(S32 x, S32 y, MASK mask)
 		}
 
 		// This call differentiates this method from childrenHandleMouseEvent().
-		LLUI::sWindow->setCursor(viewp->getHoverCursor());
+		LLUI::getInstance()->mWindow->setCursor(viewp->getHoverCursor());
 
 		if (viewp->handleHover(local_x, local_y, mask)
 			|| viewp->blockMouseEvent(local_x, local_y))
@@ -873,8 +873,8 @@ BOOL LLView::handleToolTip(S32 x, S32 y, MASK mask)
 		// allow "scrubbing" over ui by showing next tooltip immediately
 		// if previous one was still visible
 		F32 timeout = LLToolTipMgr::instance().toolTipVisible() 
-		              ? LLUI::sSettingGroups["config"]->getF32( "ToolTipFastDelay" )
-		              : LLUI::sSettingGroups["config"]->getF32( "ToolTipDelay" );
+		              ? LLUI::getInstance()->mSettingGroups["config"]->getF32( "ToolTipFastDelay" )
+		              : LLUI::getInstance()->mSettingGroups["config"]->getF32( "ToolTipDelay" );
 		LLToolTipMgr::instance().show(LLToolTip::Params()
 		                              .message(tooltip)
 		                              .sticky_rect(calcScreenRect())
@@ -1142,7 +1142,7 @@ void LLView::drawChildren()
 {
 	if (!mChildList.empty())
 	{
-		LLView* rootp = LLUI::getRootView();		
+		LLView* rootp = LLUI::getInstance()->getRootView();		
 		++sDepth;
 
 		for (child_list_reverse_iter_t child_iter = mChildList.rbegin(); child_iter != mChildList.rend();)  // ++child_iter)
@@ -1158,7 +1158,7 @@ void LLView::drawChildren()
 			if (viewp->getVisible() && viewp->getRect().isValid())
 			{
 				LLRect screen_rect = viewp->calcScreenRect();
-				if ( rootp->getLocalRect().overlaps(screen_rect)  && LLUI::sDirtyRect.overlaps(screen_rect))
+				if ( rootp->getLocalRect().overlaps(screen_rect)  && LLUI::getInstance()->mDirtyRect.overlaps(screen_rect))
 				{
 					LLUI::pushMatrix();
 					{
@@ -1200,7 +1200,7 @@ void LLView::dirtyRect()
 		parent = parent->getParent();
 	}
 
-	LLUI::dirtyRect(cur->calcScreenRect());
+	LLUI::getInstance()->dirtyRect(cur->calcScreenRect());
 }
 
 //Draw a box for debugging.
@@ -2223,9 +2223,9 @@ LLControlVariable *LLView::findControl(const std::string& name)
 		std::string control_group_key = name.substr(0, key_pos);
 		LLControlVariable* control;
 		// check if it's in the control group that name indicated
-		if(LLUI::sSettingGroups[control_group_key])
+		if(LLUI::getInstance()->mSettingGroups[control_group_key])
 		{
-			control = LLUI::sSettingGroups[control_group_key]->getControl(name);
+			control = LLUI::getInstance()->mSettingGroups[control_group_key]->getControl(name);
 			if (control)
 			{
 				return control;
@@ -2233,7 +2233,7 @@ LLControlVariable *LLView::findControl(const std::string& name)
 		}
 	}
 	
-	LLControlGroup& control_group = LLUI::getControlControlGroup(name);
+	LLControlGroup& control_group = LLUI::getInstance()->getControlControlGroup(name);
 	return control_group.getControl(name);	
 }
 
diff --git a/indra/llui/llview.h b/indra/llui/llview.h
index 8494bb338a..e36ca7c8c6 100644
--- a/indra/llui/llview.h
+++ b/indra/llui/llview.h
@@ -498,7 +498,7 @@ public:
 	// return query for iterating over focus roots in tab order
 	static const LLViewQuery & getFocusRootsQuery();
 
-	static LLWindow*	getWindow(void) { return LLUI::sWindow; }
+	static LLWindow*	getWindow(void) { return LLUI::getInstance()->mWindow; }
 
 	// Set up params after XML load before calling new(),
 	// usually to adjust layout.
diff --git a/indra/llui/llviewereventrecorder.cpp b/indra/llui/llviewereventrecorder.cpp
index 8754cfebbb..cb000aef74 100644
--- a/indra/llui/llviewereventrecorder.cpp
+++ b/indra/llui/llviewereventrecorder.cpp
@@ -44,7 +44,7 @@ LLViewerEventRecorder::LLViewerEventRecorder() {
 
 
 bool LLViewerEventRecorder::displayViewerEventRecorderMenuItems() {
-  return LLUI::sSettingGroups["config"]->getBOOL("ShowEventRecorderMenuItems");
+  return LLUI::getInstance()->mSettingGroups["config"]->getBOOL("ShowEventRecorderMenuItems");
 }
 
 
@@ -99,7 +99,7 @@ void LLViewerEventRecorder::setMouseGlobalCoords(S32 x, S32 y) {
 
 void LLViewerEventRecorder::updateMouseEventInfo(S32 local_x, S32 local_y, S32 global_x, S32 global_y, std::string mName) {
 
-  LLView * target_view = LLUI::resolvePath(LLUI::getRootView(), xui);
+  LLView * target_view = LLUI::getInstance()->resolvePath(LLUI::getInstance()->getRootView(), xui);
   if (! target_view) {
     LL_DEBUGS() << "LLViewerEventRecorder::updateMouseEventInfo - xui path on file at moment is NOT valid - so DO NOT record these local coords" << LL_ENDL;
     return;
@@ -216,7 +216,7 @@ void LLViewerEventRecorder::playbackRecording() {
   LLSD LeapCommand;
 
   // ivita sets this on startup, it also sends commands to the viewer to make start, stop, and playback menu items visible in viewer
-  LeapCommand =LLUI::sSettingGroups["config"]->getLLSD("LeapPlaybackEventsCommand");
+  LeapCommand =LLUI::getInstance()->mSettingGroups["config"]->getLLSD("LeapPlaybackEventsCommand");
   
   LL_DEBUGS() << "[VITA] launching playback - leap command is: " << LLSDXMLStreamer(LeapCommand) << LL_ENDL;
   LLLeap::create("", LeapCommand, false); // exception=false
diff --git a/indra/llui/llviewinject.h b/indra/llui/llviewinject.h
index 0de3d155c4..7f18ec6fbe 100644
--- a/indra/llui/llviewinject.h
+++ b/indra/llui/llviewinject.h
@@ -32,7 +32,7 @@ namespace llview
     public:
         /**
          * Construct TargetEvent with the desired target LLView*. (See
-         * LLUI::resolvePath() to obtain an LLView* given a string pathname.)
+         * LLUI::getInstance()->resolvePath() to obtain an LLView* given a string pathname.)
          * This sets up for operator().
          */
         TargetEvent(LLView* view);