17 files changed, 272 insertions, 55 deletions

diff --git a/indra/llui/llbutton.cpp b/indra/llui/llbutton.cpp
index f28fca35c5..fd369730d6 100644
--- a/indra/llui/llbutton.cpp
+++ b/indra/llui/llbutton.cpp
@@ -147,7 +147,8 @@ LLButton::LLButton(const LLButton::Params& p)
 	mHoverGlowStrength(p.hover_glow_amount),
 	mCommitOnReturn(p.commit_on_return),
 	mFadeWhenDisabled(FALSE),
-	mForcePressedState(FALSE)
+	mForcePressedState(FALSE),
+	mLastDrawCharsCount(0)
 {
 	static LLUICachedControl<S32> llbutton_orig_h_pad ("UIButtonOrigHPad", 0);
 	static Params default_params(LLUICtrlFactory::getDefaultParams<LLButton>());
@@ -814,7 +815,7 @@ void LLButton::draw()
 		// LLFontGL::render expects S32 max_chars variable but process in a separate way -1 value.
 		// Due to U32_MAX is equal to S32 -1 value I have rest this value for non-ellipses mode.
 		// Not sure if it is really needed. Probably S32_MAX should be always passed as max_chars.
-		mGLFont->render(label, 0, (F32)x, (F32)(LLBUTTON_V_PAD + y_offset), 
+		mLastDrawCharsCount = mGLFont->render(label, 0, (F32)x, (F32)(LLBUTTON_V_PAD + y_offset),
 			label_color % alpha,
 			mHAlign, LLFontGL::BOTTOM,
 			LLFontGL::NORMAL,
diff --git a/indra/llui/llbutton.h b/indra/llui/llbutton.h
index 7ca520b935..7fc4997133 100644
--- a/indra/llui/llbutton.h
+++ b/indra/llui/llbutton.h
@@ -210,6 +210,9 @@ public:
 	
 	void			setFont(const LLFontGL *font)		
 		{ mGLFont = ( font ? font : LLFontGL::getFontSansSerif()); }
+
+	S32				getLastDrawCharsCount() const { return mLastDrawCharsCount; }
+
 	void			setScaleImage(BOOL scale)			{ mScaleImage = scale; }
 	BOOL			getScaleImage() const				{ return mScaleImage; }
 
@@ -260,6 +263,7 @@ private:
 	S32 						mMouseHeldDownCount; 	// Counter for parameter passed to held-down callback
 	F32							mHeldDownDelay;			// seconds, after which held-down callbacks get called
 	S32							mHeldDownFrameDelay;	// frames, after which held-down callbacks get called
+	S32							mLastDrawCharsCount;
 
 	LLPointer<LLUIImage>		mImageOverlay;
 	LLFontGL::HAlign			mImageOverlayAlignment;
diff --git a/indra/llui/lldockablefloater.cpp b/indra/llui/lldockablefloater.cpp
index 35b3e486af..f56cb2eee7 100644
--- a/indra/llui/lldockablefloater.cpp
+++ b/indra/llui/lldockablefloater.cpp
@@ -136,7 +136,15 @@ void LLDockableFloater::setMinimized(BOOL minimize)
 	{
 		setVisible(FALSE);
 	}
-	setCanDock(!minimize);
+
+	if (minimize)
+	{
+		setCanDock(false);
+	}
+	else if (!minimize && mDockControl.get() != NULL && mDockControl.get()->isDockVisible())
+	{
+		setCanDock(true);
+	}
 
 	LLFloater::setMinimized(minimize);
 }
@@ -158,7 +166,10 @@ void LLDockableFloater::onDockHidden()
 
 void LLDockableFloater::onDockShown()
 {
-	setCanDock(TRUE);
+	if (!isMinimized())
+	{
+		setCanDock(TRUE);
+	}
 }
 
 void LLDockableFloater::setDocked(bool docked, bool pop_on_undock)
diff --git a/indra/llui/lldockcontrol.cpp b/indra/llui/lldockcontrol.cpp
index cdcd823b1c..35a854267a 100644
--- a/indra/llui/lldockcontrol.cpp
+++ b/indra/llui/lldockcontrol.cpp
@@ -37,7 +37,7 @@
 
 LLDockControl::LLDockControl(LLView* dockWidget, LLFloater* dockableFloater,
 		const LLUIImagePtr& dockTongue, DocAt dockAt, get_allowed_rect_callback_t get_allowed_rect_callback) :
-		mDockWidget(dockWidget), mDockableFloater(dockableFloater), mDockTongue(dockTongue)		
+		mDockWidget(dockWidget), mDockableFloater(dockableFloater), mDockTongue(dockTongue)
 {
 	mDockAt = dockAt;
 
@@ -63,6 +63,15 @@ LLDockControl::LLDockControl(LLView* dockWidget, LLFloater* dockableFloater,
 	{
 		repositionDockable();
 	}
+
+	if (mDockWidget != NULL)
+	{
+		mDockWidgetVisible = isDockVisible();
+	}
+	else
+	{
+		mDockWidgetVisible = false;
+	}
 }
 
 LLDockControl::~LLDockControl()
@@ -75,6 +84,11 @@ void LLDockControl::setDock(LLView* dockWidget)
 	if (mDockWidget != NULL)
 	{
 		repositionDockable();
+		mDockWidgetVisible = isDockVisible();
+	}
+	else
+	{
+		mDockWidgetVisible = false;
 	}
 }
 
@@ -88,11 +102,10 @@ void LLDockControl::repositionDockable()
 	LLRect dockRect = mDockWidget->calcScreenRect();
 	LLRect rootRect;
 	mGetAllowedRectCallback(rootRect);
-	static BOOL prev_visibility = !mDockWidget->getVisible();
 
 	// recalculate dockable position if dock position changed, dock visibility changed,
 	// root view rect changed or recalculation is forced
-	if (mPrevDockRect != dockRect  || prev_visibility != mDockWidget->getVisible()
+	if (mPrevDockRect != dockRect  || mDockWidgetVisible != isDockVisible()
 			|| mRootRect != rootRect || mRecalculateDocablePosition)
 	{
 		// undock dockable and off() if dock not visible
@@ -125,7 +138,7 @@ void LLDockControl::repositionDockable()
 		mPrevDockRect = dockRect;
 		mRootRect = rootRect;
 		mRecalculateDocablePosition = false;
-		prev_visibility = mDockWidget->getVisible();
+		mDockWidgetVisible = isDockVisible();
 	}
 }
 
@@ -143,6 +156,8 @@ bool LLDockControl::isDockVisible()
 
 			switch (mDockAt)
 			{
+			case LEFT: // to keep compiler happy
+				break;
 			case TOP:
 				// check is dock inside parent rect
 				LLRect dockParentRect =
@@ -170,8 +185,27 @@ void LLDockControl::moveDockable()
 	LLRect dockableRect = mDockableFloater->calcScreenRect();
 	S32 x = 0;
 	S32 y = 0;
+	LLRect dockParentRect;
 	switch (mDockAt)
 	{
+	case LEFT:
+		x = dockRect.mLeft;
+		y = dockRect.mTop + mDockTongue->getHeight() + dockableRect.getHeight();
+		// check is dockable inside root view rect
+		if (x < rootRect.mLeft)
+		{
+			x = rootRect.mLeft;
+		}
+		if (x + dockableRect.getWidth() > rootRect.mRight)
+		{
+			x = rootRect.mRight - dockableRect.getWidth();
+		}
+		
+		mDockTongueX = x + dockableRect.getWidth()/2 - mDockTongue->getWidth() / 2;
+		
+		mDockTongueY = dockRect.mTop;
+		break;
+
 	case TOP:
 		x = dockRect.getCenterX() - dockableRect.getWidth() / 2;
 		y = dockRect.mTop + mDockTongue->getHeight() + dockableRect.getHeight();
@@ -187,8 +221,7 @@ void LLDockControl::moveDockable()
 
 
 		// calculate dock tongue position
-		LLRect dockParentRect =
-								mDockWidget->getParent()->calcScreenRect();
+		dockParentRect = mDockWidget->getParent()->calcScreenRect();
 		if (dockRect.getCenterX() < dockParentRect.mLeft)
 		{
 			mDockTongueX = dockParentRect.mLeft - mDockTongue->getWidth() / 2;
diff --git a/indra/llui/lldockcontrol.h b/indra/llui/lldockcontrol.h
index 756a2900d3..eaedb4c307 100644
--- a/indra/llui/lldockcontrol.h
+++ b/indra/llui/lldockcontrol.h
@@ -48,6 +48,7 @@ public:
 	enum DocAt
 	{
 		TOP
+		,LEFT
 	};
 
 public:
@@ -80,6 +81,7 @@ private:
 	get_allowed_rect_callback_t mGetAllowedRectCallback;
 	bool mEnabled;
 	bool mRecalculateDocablePosition;
+	bool mDockWidgetVisible;
 	DocAt mDockAt;
 	LLView* mDockWidget;
 	LLRect mPrevDockRect;
diff --git a/indra/llui/llflatlistview.cpp b/indra/llui/llflatlistview.cpp
index bba5464b00..19f203b80c 100644
--- a/indra/llui/llflatlistview.cpp
+++ b/indra/llui/llflatlistview.cpp
@@ -92,7 +92,7 @@ bool LLFlatListView::addItem(LLPanel * item, const LLSD& value /*= LLUUID::null*
 	
 	//_4 is for MASK
 	item->setMouseDownCallback(boost::bind(&LLFlatListView::onItemMouseClick, this, new_pair, _4));
-	item->setRightMouseDownCallback(boost::bind(&LLFlatListView::onItemMouseClick, this, new_pair, _4));
+	item->setRightMouseDownCallback(boost::bind(&LLFlatListView::onItemRightMouseClick, this, new_pair, _4));
 
 	rearrangeItems();
 	notifyParentItemsRectChanged();
@@ -137,7 +137,7 @@ bool LLFlatListView::insertItemAfter(LLPanel* after_item, LLPanel* item_to_add,
 
 	//_4 is for MASK
 	item_to_add->setMouseDownCallback(boost::bind(&LLFlatListView::onItemMouseClick, this, new_pair, _4));
-	item_to_add->setRightMouseDownCallback(boost::bind(&LLFlatListView::onItemMouseClick, this, new_pair, _4));
+	item_to_add->setRightMouseDownCallback(boost::bind(&LLFlatListView::onItemRightMouseClick, this, new_pair, _4));
 
 	rearrangeItems();
 	notifyParentItemsRectChanged();
@@ -459,6 +459,20 @@ void LLFlatListView::onItemMouseClick(item_pair_t* item_pair, MASK mask)
 	selectItemPair(item_pair, select_item);
 }
 
+void LLFlatListView::onItemRightMouseClick(item_pair_t* item_pair, MASK mask)
+{
+	if (!item_pair)
+		return;
+
+	// Forbid deselecting of items on right mouse button click if mMultipleSelection flag is set on,
+	// because some of derived classes may have context menu and selected items must be kept.
+	if ( !(mask & MASK_CONTROL) && mMultipleSelection && isSelected(item_pair) )
+		return;
+
+	// else got same behavior as at onItemMouseClick
+	onItemMouseClick(item_pair, mask);
+}
+
 LLFlatListView::item_pair_t* LLFlatListView::getItemPair(LLPanel* item) const
 {
 	llassert(item);
diff --git a/indra/llui/llflatlistview.h b/indra/llui/llflatlistview.h
index 888258efdc..97772bc677 100644
--- a/indra/llui/llflatlistview.h
+++ b/indra/llui/llflatlistview.h
@@ -304,6 +304,8 @@ protected:
 	/** Manage selection on mouse events */
 	void onItemMouseClick(item_pair_t* item_pair, MASK mask);
 
+	void onItemRightMouseClick(item_pair_t* item_pair, MASK mask);
+
 	/**
 	 *	Updates position of items.
 	 *	It does not take into account invisible items.
diff --git a/indra/llui/lliconctrl.cpp b/indra/llui/lliconctrl.cpp
index 0330a2b374..66c2ba682f 100644
--- a/indra/llui/lliconctrl.cpp
+++ b/indra/llui/lliconctrl.cpp
@@ -56,7 +56,8 @@ LLIconCtrl::Params::Params()
 LLIconCtrl::LLIconCtrl(const LLIconCtrl::Params& p)
 :	LLUICtrl(p),
 	mColor(p.color()),
-	mImagep(p.image)
+	mImagep(p.image),
+	mPriority(0)
 {
 	if (mImagep.notNull())
 	{
@@ -93,11 +94,11 @@ void LLIconCtrl::setValue(const LLSD& value )
 	LLUICtrl::setValue(tvalue);
 	if (tvalue.isUUID())
 	{
-		mImagep = LLUI::getUIImageByID(tvalue.asUUID());
+		mImagep = LLUI::getUIImageByID(tvalue.asUUID(), mPriority);
 	}
 	else
 	{
-		mImagep = LLUI::getUIImage(tvalue.asString());
+		mImagep = LLUI::getUIImage(tvalue.asString(), mPriority);
 	}
 }
 
diff --git a/indra/llui/lliconctrl.h b/indra/llui/lliconctrl.h
index ff25b0d53e..90f1693060 100644
--- a/indra/llui/lliconctrl.h
+++ b/indra/llui/lliconctrl.h
@@ -72,10 +72,13 @@ public:
 	std::string	getImageName() const;
 
 	void			setColor(const LLColor4& color) { mColor = color; }
+	
+protected:
+	S32 mPriority;
 
 private:
 	LLUIColor mColor;
-	LLPointer<LLUIImage>	mImagep;
+	LLPointer<LLUIImage> mImagep;
 };
 
 #endif
diff --git a/indra/llui/lllayoutstack.cpp b/indra/llui/lllayoutstack.cpp
index 24fd380bb1..bac5491943 100644
--- a/indra/llui/lllayoutstack.cpp
+++ b/indra/llui/lllayoutstack.cpp
@@ -401,6 +401,16 @@ void LLLayoutStack::collapsePanel(LLPanel* panel, BOOL collapsed)
 	panel_container->mCollapsed = collapsed;
 }
 
+void LLLayoutStack::updatePanelAutoResize(const std::string& panel_name, BOOL auto_resize)
+{
+	LayoutPanel* panel = findEmbeddedPanelByName(panel_name);
+
+	if (panel)
+	{
+		panel->mAutoResize = auto_resize;
+	}
+}
+
 void LLLayoutStack::updateLayout(BOOL force_resize)
 {
 	static LLUICachedControl<S32> resize_bar_overlap ("UIResizeBarOverlap", 0);
@@ -713,6 +723,24 @@ LLLayoutStack::LayoutPanel* LLLayoutStack::findEmbeddedPanel(LLPanel* panelp) co
 	return NULL;
 }
 
+LLLayoutStack::LayoutPanel* LLLayoutStack::findEmbeddedPanelByName(const std::string& name) const
+{
+	LayoutPanel* result = NULL;
+
+	for (e_panel_list_t::const_iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
+	{
+		LayoutPanel* p = *panel_it;
+
+		if (p->mPanel->getName() == name)
+		{
+			result = p;
+			break;
+		}
+	}
+
+	return result;
+}
+
 // Compute sum of min_width or min_height of children
 void LLLayoutStack::calcMinExtents()
 {
diff --git a/indra/llui/lllayoutstack.h b/indra/llui/lllayoutstack.h
index 49cbe7270f..9ded48ef6a 100644
--- a/indra/llui/lllayoutstack.h
+++ b/indra/llui/lllayoutstack.h
@@ -80,6 +80,7 @@ public:
 	void collapsePanel(LLPanel* panel, BOOL collapsed = TRUE);
 	S32 getNumPanels() { return mPanels.size(); }
 
+	void updatePanelAutoResize(const std::string& panel_name, BOOL auto_resize);
 protected:
 	LLLayoutStack(const Params&);
 	friend class LLUICtrlFactory;
@@ -96,7 +97,9 @@ private:
 
 	typedef std::vector<LayoutPanel*> e_panel_list_t;
 	e_panel_list_t mPanels;
+
 	LayoutPanel* findEmbeddedPanel(LLPanel* panelp) const;
+	LayoutPanel* findEmbeddedPanelByName(const std::string& name) const;
 
 	S32 mMinWidth;  // calculated by calcMinExtents
 	S32 mMinHeight;  // calculated by calcMinExtents
diff --git a/indra/llui/lltabcontainer.cpp b/indra/llui/lltabcontainer.cpp
index 3ca05ff0ff..732c01614b 100644
--- a/indra/llui/lltabcontainer.cpp
+++ b/indra/llui/lltabcontainer.cpp
@@ -105,6 +105,15 @@ struct LLPlaceHolderPanel : public LLPanel
 static LLDefaultChildRegistry::Register<LLPlaceHolderPanel> r1("placeholder");
 static LLDefaultChildRegistry::Register<LLTabContainer> r2("tab_container");
 
+LLTabContainer::TabParams::TabParams()
+:	tab_top_image_unselected("tab_top_image_unselected"),
+	tab_top_image_selected("tab_top_image_selected"),
+	tab_bottom_image_unselected("tab_bottom_image_unselected"),
+	tab_bottom_image_selected("tab_bottom_image_selected"),
+	tab_left_image_unselected("tab_left_image_unselected"),
+	tab_left_image_selected("tab_left_image_selected")
+{}
+
 LLTabContainer::Params::Params()
 :	tab_width("tab_width"),
 	tab_min_width("tab_min_width"),
@@ -113,12 +122,9 @@ LLTabContainer::Params::Params()
 	tab_position("tab_position"),
 	hide_tabs("hide_tabs", false),
 	tab_padding_right("tab_padding_right"),
-	tab_top_image_unselected("tab_top_image_unselected"),
-	tab_top_image_selected("tab_top_image_selected"),
-	tab_bottom_image_unselected("tab_bottom_image_unselected"),
-	tab_bottom_image_selected("tab_bottom_image_selected"),
-	tab_left_image_unselected("tab_left_image_unselected"),
-	tab_left_image_selected("tab_left_image_selected")
+	first_tab("first_tab"),
+	middle_tab("middle_tab"),
+	last_tab("last_tab")
 {
 	name(std::string("tab_container"));
 	mouse_opaque = false;
@@ -147,12 +153,9 @@ LLTabContainer::LLTabContainer(const LLTabContainer::Params& p)
 	mRightTabBtnOffset(p.tab_padding_right),
 	mTotalTabWidth(0),
 	mTabPosition(p.tab_position),
-	mImageTopUnselected(p.tab_top_image_unselected),
-	mImageTopSelected(p.tab_top_image_selected),
-	mImageBottomUnselected(p.tab_bottom_image_unselected),
-	mImageBottomSelected(p.tab_bottom_image_selected),
-	mImageLeftUnselected(p.tab_left_image_unselected),
-	mImageLeftSelected(p.tab_left_image_selected)
+	mFirstTabParams(p.first_tab),
+	mMiddleTabParams(p.middle_tab),
+	mLastTabParams(p.last_tab)
 {
 	static LLUICachedControl<S32> tabcntr_vert_tab_min_width ("UITabCntrVertTabMinWidth", 0);
 
@@ -791,6 +794,29 @@ void LLTabContainer::addTabPanel(LLPanel* panelp)
 	addTabPanel(TabPanelParams().panel(panelp));
 }
 
+// function to update images
+void LLTabContainer::update_images(LLTabTuple* tuple, TabParams params, LLTabContainer::TabPosition pos)
+{
+	if (tuple && tuple->mButton)
+	{
+		if (pos == LLTabContainer::TOP)
+		{
+			tuple->mButton->setImageUnselected(static_cast<LLUIImage*>(params.tab_top_image_unselected));
+			tuple->mButton->setImageSelected(static_cast<LLUIImage*>(params.tab_top_image_selected));
+		}
+		else if (pos == LLTabContainer::BOTTOM)
+		{
+			tuple->mButton->setImageUnselected(static_cast<LLUIImage*>(params.tab_bottom_image_unselected));
+			tuple->mButton->setImageSelected(static_cast<LLUIImage*>(params.tab_bottom_image_selected));
+		}
+		else if (pos == LLTabContainer::LEFT)
+		{
+			tuple->mButton->setImageUnselected(static_cast<LLUIImage*>(params.tab_left_image_unselected));
+			tuple->mButton->setImageSelected(static_cast<LLUIImage*>(params.tab_left_image_selected));
+		}
+	}
+}
+
 void LLTabContainer::addTabPanel(const TabPanelParams& panel)
 {
 	LLPanel* child = panel.panel();
@@ -888,14 +914,14 @@ void LLTabContainer::addTabPanel(const TabPanelParams& panel)
 	else if( getTabPosition() == LLTabContainer::TOP )
 	{
 		btn_rect.setLeftTopAndSize( 0, getRect().getHeight() - getTopBorderHeight() + tab_fudge, button_width, mTabHeight);
-		tab_img = mImageTopUnselected.get();
-		tab_selected_img = mImageTopSelected.get();
+		tab_img = mMiddleTabParams.tab_top_image_unselected;
+		tab_selected_img = mMiddleTabParams.tab_top_image_selected; 
 	}
 	else
 	{
 		btn_rect.setOriginAndSize( 0, 0 + tab_fudge, button_width, mTabHeight);
-		tab_img = mImageBottomUnselected.get();
-		tab_selected_img = mImageBottomSelected.get();
+		tab_img = mMiddleTabParams.tab_bottom_image_unselected;
+		tab_selected_img = mMiddleTabParams.tab_bottom_image_selected;
 	}
 
 	LLTextBox* textbox = NULL;
@@ -926,8 +952,8 @@ void LLTabContainer::addTabPanel(const TabPanelParams& panel)
 			p.click_callback.function(boost::bind(&LLTabContainer::onTabBtn, this, _2, child));
 			p.font(font);
 			p.label(trimmed_label);
-			p.image_unselected(mImageLeftUnselected);
-			p.image_selected(mImageLeftSelected);
+			p.image_unselected(mMiddleTabParams.tab_left_image_unselected);
+			p.image_selected(mMiddleTabParams.tab_left_image_selected);
 			p.scale_image(true);
 			p.font_halign = LLFontGL::LEFT;
 			p.tab_stop(false);
@@ -983,6 +1009,31 @@ void LLTabContainer::addTabPanel(const TabPanelParams& panel)
 	LLTabTuple* tuple = new LLTabTuple( this, child, btn, textbox );
 	insertTuple( tuple, insertion_point );
 
+	// if new tab was added as a first or last tab, update button image 
+	// and update button image of any tab it may have affected
+	if (tuple == mTabList.front())
+	{  
+		update_images(tuple, mFirstTabParams, getTabPosition());
+
+		if (mTabList.size() == 2) 
+		{		
+			update_images(mTabList[1], mLastTabParams, getTabPosition());
+		}
+		else if (mTabList.size() > 2) 
+		{
+			update_images(mTabList[1], mMiddleTabParams, getTabPosition());
+		}
+	}
+	else if (tuple == mTabList.back())
+	{
+		update_images(tuple, mLastTabParams, getTabPosition());
+
+		if (mTabList.size() > 2)
+		{
+			update_images(mTabList[mTabList.size()-2], mMiddleTabParams, getTabPosition());
+		}
+	}
+
 	//Don't add button and textbox if tab buttons are invisible(EXT - 576)
 	if (!getTabsHidden())
 	{
@@ -1064,7 +1115,17 @@ void LLTabContainer::removeTabPanel(LLPanel* child)
 		LLTabTuple* tuple = *iter;
 		if( tuple->mTabPanel == child )
 		{
- 			removeChild( tuple->mButton );
+			// update tab button images if removing the first or last tab
+			if ((tuple == mTabList.front()) && (mTabList.size() > 1))
+			{
+				update_images(mTabList[1], mFirstTabParams, getTabPosition());
+			}
+			else if ((tuple == mTabList.back()) && (mTabList.size() > 2))
+			{
+				update_images(mTabList[mTabList.size()-2], mLastTabParams, getTabPosition());
+			}
+
+			removeChild( tuple->mButton );
  			delete tuple->mButton;
 
  			removeChild( tuple->mTabPanel );
diff --git a/indra/llui/lltabcontainer.h b/indra/llui/lltabcontainer.h
index e3af5384b1..a81974cd42 100644
--- a/indra/llui/lltabcontainer.h
+++ b/indra/llui/lltabcontainer.h
@@ -61,6 +61,17 @@ public:
 		static void declareValues();
 	};
 
+	struct TabParams : public LLInitParam::Block<TabParams>
+	{
+		Optional<LLUIImage*>				tab_top_image_unselected,
+											tab_top_image_selected,
+											tab_bottom_image_unselected,
+											tab_bottom_image_selected,
+											tab_left_image_unselected,
+											tab_left_image_selected;		
+		TabParams();
+	};
+
 	struct Params
 	:	public LLInitParam::Block<Params, LLPanel::Params>
 	{
@@ -73,12 +84,9 @@ public:
 		Optional<bool>						hide_tabs;
 		Optional<S32>						tab_padding_right;
 
-		Optional<LLUIImage*>				tab_top_image_unselected,
-											tab_top_image_selected,
-											tab_bottom_image_unselected,
-											tab_bottom_image_selected,
-											tab_left_image_unselected,
-											tab_left_image_selected;
+		Optional<TabParams>					first_tab,
+											middle_tab,
+											last_tab;
 
 		Params();
 	};
@@ -215,6 +223,9 @@ private:
 	void updateMaxScrollPos();
 	void commitHoveredButton(S32 x, S32 y);
 
+	// updates tab button images given the tuple, tab position and the corresponding params
+	void update_images(LLTabTuple* tuple, TabParams params, LLTabContainer::TabPosition pos);
+
 	// Variables
 	
 	typedef std::vector<LLTabTuple*> tuple_list_t;
@@ -252,12 +263,9 @@ private:
 
 	LLFrameTimer					mDragAndDropDelayTimer;
 
-	LLPointer<LLUIImage>			mImageTopUnselected;
-	LLPointer<LLUIImage>			mImageTopSelected;
-	LLPointer<LLUIImage>			mImageBottomUnselected;
-	LLPointer<LLUIImage>			mImageBottomSelected;
-	LLPointer<LLUIImage>			mImageLeftUnselected;
-	LLPointer<LLUIImage>			mImageLeftSelected;
+	TabParams						mFirstTabParams;
+	TabParams						mMiddleTabParams;
+	TabParams						mLastTabParams;
 };
 
 #endif  // LL_TABCONTAINER_H
diff --git a/indra/llui/llui.cpp b/indra/llui/llui.cpp
index da9384f876..48504a1e54 100644
--- a/indra/llui/llui.cpp
+++ b/indra/llui/llui.cpp
@@ -1807,11 +1807,11 @@ void LLUI::glRectToScreen(const LLRect& gl, LLRect *screen)
 }
 
 //static
-LLPointer<LLUIImage> LLUI::getUIImageByID(const LLUUID& image_id)
+LLPointer<LLUIImage> LLUI::getUIImageByID(const LLUUID& image_id, S32 priority)
 {
 	if (sImageProvider)
 	{
-		return sImageProvider->getUIImageByID(image_id);
+		return sImageProvider->getUIImageByID(image_id, priority);
 	}
 	else
 	{
@@ -1820,10 +1820,10 @@ LLPointer<LLUIImage> LLUI::getUIImageByID(const LLUUID& image_id)
 }
 
 //static 
-LLPointer<LLUIImage> LLUI::getUIImage(const std::string& name)
+LLPointer<LLUIImage> LLUI::getUIImage(const std::string& name, S32 priority)
 {
 	if (!name.empty() && sImageProvider)
-		return sImageProvider->getUIImage(name);
+		return sImageProvider->getUIImage(name, priority);
 	else
 		return NULL;
 }
diff --git a/indra/llui/llui.h b/indra/llui/llui.h
index 6ab78ab3cd..efb1b0a36f 100644
--- a/indra/llui/llui.h
+++ b/indra/llui/llui.h
@@ -195,8 +195,8 @@ public:
 	static void getMousePositionLocal(const LLView* viewp, S32 *x, S32 *y);
 	static void setScaleFactor(const LLVector2& scale_factor);
 	static void setLineWidth(F32 width);
-	static LLPointer<LLUIImage> getUIImageByID(const LLUUID& image_id);
-	static LLPointer<LLUIImage> getUIImage(const std::string& name);
+	static LLPointer<LLUIImage> getUIImageByID(const LLUUID& image_id, S32 priority = 0);
+	static LLPointer<LLUIImage> getUIImage(const std::string& name, S32 priority = 0);
 	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);
@@ -241,8 +241,8 @@ protected:
 	LLImageProviderInterface() {};
 	virtual ~LLImageProviderInterface() {};
 public:
-	virtual LLPointer<LLUIImage> getUIImage(const std::string& name) = 0;
-	virtual LLPointer<LLUIImage> getUIImageByID(const LLUUID& id) = 0;
+	virtual LLPointer<LLUIImage> getUIImage(const std::string& name, S32 priority) = 0;
+	virtual LLPointer<LLUIImage> getUIImageByID(const LLUUID& id, S32 priority) = 0;
 	virtual void cleanUp() = 0;
 };
 
diff --git a/indra/llui/lluicolortable.cpp b/indra/llui/lluicolortable.cpp
index 5827c0d627..851091f0ca 100644
--- a/indra/llui/lluicolortable.cpp
+++ b/indra/llui/lluicolortable.cpp
@@ -3,7 +3,30 @@
  * @brief brief LLUIColorTable class implementation file
  *
  * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * 
  * Copyright (c) 2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
  * $/LicenseInfo$
  */
 
diff --git a/indra/llui/lluicolortable.h b/indra/llui/lluicolortable.h
index f102a573b8..59be0c4f9a 100644
--- a/indra/llui/lluicolortable.h
+++ b/indra/llui/lluicolortable.h
@@ -3,7 +3,30 @@
  * @brief brief LLUIColorTable class header file
  *
  * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * 
  * Copyright (c) 2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
  * $/LicenseInfo$
  */