16 files changed, 278 insertions, 367 deletions

diff --git a/indra/llui/llaccordionctrltab.h b/indra/llui/llaccordionctrltab.h
index 00fb276f19..f87534fa76 100644
--- a/indra/llui/llaccordionctrltab.h
+++ b/indra/llui/llaccordionctrltab.h
@@ -91,10 +91,10 @@ public:
 
 		Optional<bool>			selection_enabled;
 
-		Optional<S32>			padding_left;
-		Optional<S32>			padding_right;
-		Optional<S32>			padding_top;
-		Optional<S32>			padding_bottom;
+		Optional<S32>			padding_left,
+								padding_right,
+								padding_top,
+								padding_bottom;
 
 		Params();
 	};
@@ -176,7 +176,7 @@ public:
 	virtual BOOL handleScrollWheel( S32 x, S32 y, S32 clicks );
 
 
-	virtual bool addChild(LLView* child, S32 tab_group);
+	virtual bool addChild(LLView* child, S32 tab_group = 0 );
 
 	bool isExpanded() const { return mDisplayChildren; }
 
diff --git a/indra/llui/llfloater.cpp b/indra/llui/llfloater.cpp
index 0cd692b4a4..e7d0950846 100644
--- a/indra/llui/llfloater.cpp
+++ b/indra/llui/llfloater.cpp
@@ -2780,7 +2780,8 @@ LLFastTimer::DeclareTimer POST_BUILD("Floater Post Build");
 bool LLFloater::initFloaterXML(LLXMLNodePtr node, LLView *parent, const std::string& filename, LLXMLNodePtr output_node)
 {
 	Params params(LLUICtrlFactory::getDefaultParams<LLFloater>());
-	LLXUIParser::instance().readXUI(node, params, filename); // *TODO: Error checking
+	LLXUIParser parser;
+	parser.readXUI(node, params, filename); // *TODO: Error checking
 
 	if (output_node)
 	{
@@ -2788,8 +2789,7 @@ bool LLFloater::initFloaterXML(LLXMLNodePtr node, LLView *parent, const std::str
 		setupParamsForExport(output_params, parent);
         Params default_params(LLUICtrlFactory::getDefaultParams<LLFloater>());
 		output_node->setName(node->getName()->mString);
-		LLXUIParser::instance().writeXUI(
-			output_node, output_params, &default_params);
+		parser.writeXUI(output_node, output_params, &default_params);
 	}
 
 	// Default floater position to top-left corner of screen
diff --git a/indra/llui/lllayoutstack.cpp b/indra/llui/lllayoutstack.cpp
index 4512091371..15a0369eb9 100644
--- a/indra/llui/lllayoutstack.cpp
+++ b/indra/llui/lllayoutstack.cpp
@@ -41,92 +41,63 @@
 #include "llresizebar.h"
 #include "llcriticaldamp.h"
 
-static LLDefaultChildRegistry::Register<LLLayoutStack> register_layout_stack("layout_stack", &LLLayoutStack::fromXML);
-
+static LLDefaultChildRegistry::Register<LLLayoutStack> register_layout_stack("layout_stack");
+static LLLayoutStack::LayoutStackRegistry::Register<LLLayoutPanel> register_layout_panel("layout_panel");
 
 //
-// LLLayoutStack
+// LLLayoutPanel
 //
-struct LLLayoutStack::LayoutPanel
+LLLayoutPanel::LLLayoutPanel(const Params& p)	
+:	LLPanel(p),
+ 	mMinDim(p.min_dim), 
+ 	mMaxDim(p.max_dim), 
+ 	mAutoResize(p.auto_resize),
+ 	mUserResize(p.user_resize),
+ 	mCollapsed(FALSE),
+ 	mCollapseAmt(0.f),
+ 	mVisibleAmt(1.f), // default to fully visible
+ 	mResizeBar(NULL) 
 {
-	LayoutPanel(LLPanel* panelp, ELayoutOrientation orientation, S32 min_width, S32 min_height, S32 max_width, S32 max_height, BOOL auto_resize, BOOL user_resize)	:	mPanel(panelp), 
-		mMinWidth(min_width), 
-		mMinHeight(min_height),
-		mMaxWidth(max_width), 
-		mMaxHeight(max_height),
-		mAutoResize(auto_resize),
-		mUserResize(user_resize),
-		mOrientation(orientation),
-		mCollapsed(FALSE),
-		mCollapseAmt(0.f),
-		mVisibleAmt(1.f), // default to fully visible
-		mResizeBar(NULL) 
+	// panels initialized as hidden should not start out partially visible
+	if (!getVisible())
 	{
-		LLResizeBar::Side side = (orientation == HORIZONTAL) ? LLResizeBar::RIGHT : LLResizeBar::BOTTOM;
-		LLRect resize_bar_rect = panelp->getRect();
-
-		S32 min_dim;
-		if (orientation == HORIZONTAL)
-		{
-			min_dim = mMinHeight;
-		}
-		else
-		{
-			min_dim = mMinWidth;
-		}
-		LLResizeBar::Params p;
-		p.name("resize");
-			p.resizing_view(mPanel);
-		p.min_size(min_dim);
-		p.side(side);
-		p.snapping_enabled(false);
-		mResizeBar = LLUICtrlFactory::create<LLResizeBar>(p);
-		// panels initialized as hidden should not start out partially visible
-		if (!mPanel->getVisible())
-		{
-			mVisibleAmt = 0.f;
-		}
+		mVisibleAmt = 0.f;
 	}
+}
 
-	~LayoutPanel()
-	{
-		// probably not necessary, but...
-		delete mResizeBar;
-		mResizeBar = NULL;
-	}
+void LLLayoutPanel::initFromParams(const Params& p)
+{
+	LLPanel::initFromParams(p);
+	setFollowsNone();
+}
+
+
+LLLayoutPanel::~LLLayoutPanel()
+{
+	// probably not necessary, but...
+	delete mResizeBar;
+	mResizeBar = NULL;
+}
 	
-	F32 getCollapseFactor()
+F32 LLLayoutPanel::getCollapseFactor(LLLayoutStack::ELayoutOrientation orientation)
+{
+	if (orientation == LLLayoutStack::HORIZONTAL)
 	{
-		if (mOrientation == HORIZONTAL)
-		{
-			F32 collapse_amt = 
-				clamp_rescale(mCollapseAmt, 0.f, 1.f, 1.f, (F32)mMinWidth / (F32)llmax(1, mPanel->getRect().getWidth()));
-			return mVisibleAmt * collapse_amt;
-		}
-		else
+		F32 collapse_amt = 
+			clamp_rescale(mCollapseAmt, 0.f, 1.f, 1.f, (F32)mMinDim / (F32)llmax(1, getRect().getWidth()));
+		return mVisibleAmt * collapse_amt;
+	}
+	else
 	{
-			F32 collapse_amt = 
-				clamp_rescale(mCollapseAmt, 0.f, 1.f, 1.f, llmin(1.f, (F32)mMinHeight / (F32)llmax(1, mPanel->getRect().getHeight())));
-			return mVisibleAmt * collapse_amt;
-		}
+		F32 collapse_amt = 
+			clamp_rescale(mCollapseAmt, 0.f, 1.f, 1.f, llmin(1.f, (F32)mMinDim / (F32)llmax(1, getRect().getHeight())));
+		return mVisibleAmt * collapse_amt;
 	}
+}
 
-	LLPanel* mPanel;
-	S32 mMinWidth;
-	S32 mMinHeight;
-
-	// mMaxWidth & mMaxHeight are added to make configurable max width of the nearby chat bar. EXT-5589
-	// they are not processed by LLLayoutStack but they can be if necessary
-	S32 mMaxWidth;
-	S32 mMaxHeight;
-	BOOL mAutoResize;
-	BOOL mUserResize;
-	BOOL mCollapsed;
-	LLResizeBar* mResizeBar;
-	ELayoutOrientation mOrientation;
-	F32 mVisibleAmt;
-	F32 mCollapseAmt;
-};
+//
+// LLLayoutStack
+//
 
 LLLayoutStack::Params::Params()
 :	orientation("orientation", std::string("vertical")),
@@ -163,18 +134,18 @@ void LLLayoutStack::draw()
 	for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
 	{
 		// clip to layout rectangle, not bounding rectangle
-		LLRect clip_rect = (*panel_it)->mPanel->getRect();
+		LLRect clip_rect = (*panel_it)->getRect();
 		// scale clipping rectangle by visible amount
 		if (mOrientation == HORIZONTAL)
 		{
-			clip_rect.mRight = clip_rect.mLeft + llround((F32)clip_rect.getWidth() * (*panel_it)->getCollapseFactor());
+			clip_rect.mRight = clip_rect.mLeft + llround((F32)clip_rect.getWidth() * (*panel_it)->getCollapseFactor(mOrientation));
 		}
 		else
 		{
-			clip_rect.mBottom = clip_rect.mTop - llround((F32)clip_rect.getHeight() * (*panel_it)->getCollapseFactor());
+			clip_rect.mBottom = clip_rect.mTop - llround((F32)clip_rect.getHeight() * (*panel_it)->getCollapseFactor(mOrientation));
 		}
 
-		LLPanel* panelp = (*panel_it)->mPanel;
+		LLPanel* panelp = (*panel_it);
 
 		LLLocalClipRect clip(clip_rect, mClip);
 		// only force drawing invisible children if visible amount is non-zero
@@ -185,7 +156,7 @@ void LLLayoutStack::draw()
 
 void LLLayoutStack::removeChild(LLView* view)
 {
-	LayoutPanel* embedded_panelp = findEmbeddedPanel(dynamic_cast<LLPanel*>(view));
+	LLLayoutPanel* embedded_panelp = findEmbeddedPanel(dynamic_cast<LLPanel*>(view));
 
 	if (embedded_panelp)
 	{
@@ -206,149 +177,16 @@ BOOL LLLayoutStack::postBuild()
 	return TRUE;
 }
 
-static void get_attribute_s32_and_write(LLXMLNodePtr node,
-										const char* name,
-										S32 *value,
-										S32 default_value,
-										LLXMLNodePtr output_child)
-{
-	BOOL has_attr = node->getAttributeS32(name, *value);
-	if (has_attr && *value != default_value && output_child)
-	{
-		// create an attribute child node
-		LLXMLNodePtr child_attr = output_child->createChild(name, TRUE);
-		child_attr->setIntValue(*value);
-	}
-}
-
-static void get_attribute_bool_and_write(LLXMLNodePtr node,
-										const char* name,
-										BOOL *value,
-										BOOL default_value,
-										LLXMLNodePtr output_child)
+bool LLLayoutStack::addChild(LLView* child, S32 tab_group)
 {
-	BOOL has_attr = node->getAttributeBOOL(name, *value);
-	if (has_attr && *value != default_value && output_child)
+	LLLayoutPanel* panelp = dynamic_cast<LLLayoutPanel*>(child);
+	if (panelp)
 	{
-		LLXMLNodePtr child_attr = output_child->createChild(name, TRUE);
-		child_attr->setBoolValue(*value);
+		mPanels.push_back(panelp);
 	}
+	return LLView::addChild(child, tab_group);
 }
-//static 
-LLView* LLLayoutStack::fromXML(LLXMLNodePtr node, LLView *parent, LLXMLNodePtr output_node)
-{
-	LLLayoutStack::Params p(LLUICtrlFactory::getDefaultParams<LLLayoutStack>());
-	LLXUIParser::instance().readXUI(node, p, LLUICtrlFactory::getInstance()->getCurFileName());
 
-	// Export must happen before setupParams() mungles rectangles and before
-	// this item gets added to parent (otherwise screws up last_child_rect
-	// logic). JC
-	if (output_node)
-	{
-		Params output_params(p);
-		setupParamsForExport(output_params, parent);
-		LLLayoutStack::Params default_params(LLUICtrlFactory::getDefaultParams<LLLayoutStack>());
-		output_node->setName(node->getName()->mString);
-		LLXUIParser::instance().writeXUI(
-			output_node, output_params, &default_params);
-	}
-
-	p.from_xui = true;
-	applyXUILayout(p, parent);
-	LLLayoutStack* layout_stackp = LLUICtrlFactory::create<LLLayoutStack>(p);
-
-	if (parent && layout_stackp)
-	{
-		S32 tab_group = p.tab_group.isProvided() ? p.tab_group() : parent->getLastTabGroup();
-
-		parent->addChild(layout_stackp, tab_group);
-	}
-
-	for (LLXMLNodePtr child_node = node->getFirstChild(); child_node.notNull(); child_node = child_node->getNextSibling())
-	{
-		const S32 DEFAULT_MIN_WIDTH = 0;
-		const S32 DEFAULT_MIN_HEIGHT = 0;
-		const S32 DEFAULT_MAX_WIDTH = S32_MAX;
-		const S32 DEFAULT_MAX_HEIGHT = S32_MAX;
-		const BOOL DEFAULT_AUTO_RESIZE = TRUE;
-
-		S32 min_width = DEFAULT_MIN_WIDTH;
-		S32 min_height = DEFAULT_MIN_HEIGHT;
-		S32 max_width = DEFAULT_MAX_WIDTH;
-		S32 max_height = DEFAULT_MAX_HEIGHT;
-		BOOL auto_resize = DEFAULT_AUTO_RESIZE;
-
-		LLXMLNodePtr output_child;
-		if (output_node) 
-		{
-			output_child = output_node->createChild("", FALSE);
-		}
-
-		// Layout stack allows child nodes to acquire additional attributes,
-		// such as "min_width" in:  <button label="Foo" min_width="100"/>
-		// If these attributes exist and have non-default values, write them
-		// to the output node.
-		get_attribute_s32_and_write(child_node, "min_width", &min_width,
-			DEFAULT_MIN_WIDTH, output_child);
-		get_attribute_s32_and_write(child_node, "min_height", &min_height,
-			DEFAULT_MIN_HEIGHT, output_child);
-		get_attribute_s32_and_write(child_node, "max_width", &max_width,
-			DEFAULT_MAX_WIDTH, output_child);
-		get_attribute_s32_and_write(child_node, "max_height", &max_height,
-			DEFAULT_MAX_HEIGHT, output_child);
-		get_attribute_bool_and_write(child_node, "auto_resize", &auto_resize,
-			DEFAULT_AUTO_RESIZE, output_child);
-
-		if (child_node->hasName("layout_panel"))
-		{
-			BOOL user_resize = TRUE;
-			get_attribute_bool_and_write(child_node, "user_resize", &user_resize,
-				TRUE, output_child);
-			LLPanel* panelp = (LLPanel*)LLPanel::fromXML(child_node, layout_stackp, output_child);
-			if (panelp)
-			{
-				panelp->setFollowsNone();
-				layout_stackp->addPanel(panelp, min_width, min_height, max_width, max_height, auto_resize, user_resize);
-			}
-		}
-		else
-		{
-			BOOL user_resize = FALSE;
-			get_attribute_bool_and_write(child_node, "user_resize", &user_resize,
-				FALSE, output_child);
-
-			LLPanel::Params p;
-			p.mouse_opaque(false);
-			LLPanel* panelp = LLUICtrlFactory::create<LLPanel>(p);
-			LLView* new_child = LLUICtrlFactory::getInstance()->createFromXML(child_node, panelp, LLStringUtil::null, LLPanel::child_registry_t::instance(), output_child);
-			if (new_child)
-			{
-				// put child in new embedded panel
-				layout_stackp->addPanel(panelp, min_width, min_height, max_width, max_height, auto_resize, user_resize);
-				// resize panel to contain widget and move widget to be contained in panel
-				panelp->setRect(new_child->getRect());
-				new_child->setOrigin(0, 0);
-			}
-			else
-			{
-				panelp->die();
-			}
-		}
-		
-		if (output_child && !output_child->mChildren && output_child->mAttributes.empty() && output_child->getValue().empty())
-		{
-			output_node->deleteChild(output_child);
-		}
-	}
-
-	if (!layout_stackp->postBuild())
-	{
-		delete layout_stackp;
-		return NULL;
-	}
-
-	return layout_stackp;
-}
 
 S32 LLLayoutStack::getDefaultHeight(S32 cur_height)
 {
@@ -374,34 +212,14 @@ S32 LLLayoutStack::getDefaultWidth(S32 cur_width)
 	return cur_width;
 }
 
-void LLLayoutStack::addPanel(LLPanel* panel, S32 min_width, S32 min_height, S32 max_width, S32 max_height, BOOL auto_resize, BOOL user_resize, EAnimate animate, S32 index)
+void LLLayoutStack::addPanel(LLLayoutPanel* panel, EAnimate animate)
 {
-	// panel starts off invisible (collapsed)
-	if (animate == ANIMATE)
-	{
-		panel->setVisible(FALSE);
-	}
-	LayoutPanel* embedded_panel = new LayoutPanel(panel, mOrientation, min_width, min_height, max_width, max_height, auto_resize, user_resize);
-	
-	mPanels.insert(mPanels.begin() + llclamp(index, 0, (S32)mPanels.size()), embedded_panel);
-	
-	if (panel->getParent() != this) 
-	{
-		addChild(panel);
-	}
-	addChild(embedded_panel->mResizeBar);
-
-	// bring all resize bars to the front so that they are clickable even over the panels
-	// with a bit of overlap
-	for (e_panel_list_t::iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
-	{
-		LLResizeBar* resize_barp = (*panel_it)->mResizeBar;
-		sendChildToFront(resize_barp);
-	}
+	addChild(panel);
 
-	// start expanding panel animation
+	// panel starts off invisible (collapsed)
 	if (animate == ANIMATE)
 	{
+		panel->mVisibleAmt = 0.f;
 		panel->setVisible(TRUE);
 	}
 }
@@ -413,7 +231,7 @@ void LLLayoutStack::removePanel(LLPanel* panel)
 
 void LLLayoutStack::collapsePanel(LLPanel* panel, BOOL collapsed)
 {
-	LayoutPanel* panel_container = findEmbeddedPanel(panel);
+	LLLayoutPanel* panel_container = findEmbeddedPanel(panel);
 	if (!panel_container) return;
 
 	panel_container->mCollapsed = collapsed;
@@ -421,7 +239,7 @@ void LLLayoutStack::collapsePanel(LLPanel* panel, BOOL collapsed)
 
 void LLLayoutStack::updatePanelAutoResize(const std::string& panel_name, BOOL auto_resize)
 {
-	LayoutPanel* panel = findEmbeddedPanelByName(panel_name);
+	LLLayoutPanel* panel = findEmbeddedPanelByName(panel_name);
 
 	if (panel)
 	{
@@ -431,7 +249,7 @@ void LLLayoutStack::updatePanelAutoResize(const std::string& panel_name, BOOL au
 
 void LLLayoutStack::setPanelUserResize(const std::string& panel_name, BOOL user_resize)
 {
-	LayoutPanel* panel = findEmbeddedPanelByName(panel_name);
+	LLLayoutPanel* panel = findEmbeddedPanelByName(panel_name);
 
 	if (panel)
 	{
@@ -439,27 +257,25 @@ void LLLayoutStack::setPanelUserResize(const std::string& panel_name, BOOL user_
 	}
 }
 
-bool LLLayoutStack::getPanelMinSize(const std::string& panel_name, S32* min_widthp, S32* min_heightp)
+bool LLLayoutStack::getPanelMinSize(const std::string& panel_name, S32* min_dimp)
 {
-	LayoutPanel* panel = findEmbeddedPanelByName(panel_name);
+	LLLayoutPanel* panel = findEmbeddedPanelByName(panel_name);
 
 	if (panel)
 	{
-		if (min_widthp) *min_widthp = panel->mMinWidth;
-		if (min_heightp) *min_heightp = panel->mMinHeight;
+		if (min_dimp) *min_dimp = panel->mMinDim;
 	}
 
 	return NULL != panel;
 }
 
-bool LLLayoutStack::getPanelMaxSize(const std::string& panel_name, S32* max_widthp, S32* max_heightp)
+bool LLLayoutStack::getPanelMaxSize(const std::string& panel_name, S32* max_dimp)
 {
-	LayoutPanel* panel = findEmbeddedPanelByName(panel_name);
+	LLLayoutPanel* panel = findEmbeddedPanelByName(panel_name);
 
 	if (panel)
 	{
-		if (max_widthp) *max_widthp = panel->mMaxWidth;
-		if (max_heightp) *max_heightp = panel->mMaxHeight;
+		if (max_dimp) *max_dimp = panel->mMaxDim;
 	}
 
 	return NULL != panel;
@@ -471,6 +287,7 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 	LLFastTimer ft(FTM_UPDATE_LAYOUT);
 	static LLUICachedControl<S32> resize_bar_overlap ("UIResizeBarOverlap", 0);
 	calcMinExtents();
+	createResizeBars();
 
 	// calculate current extents
 	S32 total_width = 0;
@@ -482,7 +299,7 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 	e_panel_list_t::iterator panel_it;
 	for (panel_it = mPanels.begin(); panel_it != mPanels.end();	++panel_it)
 	{
-		LLPanel* panelp = (*panel_it)->mPanel;
+		LLPanel* panelp = (*panel_it);
 		if (panelp->getVisible()) 
 		{
 			if (mAnimate)
@@ -532,11 +349,11 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 		if (mOrientation == HORIZONTAL)
 		{
 			// enforce minimize size constraint by default
-			if (panelp->getRect().getWidth() < (*panel_it)->mMinWidth)
+			if (panelp->getRect().getWidth() < (*panel_it)->mMinDim)
 			{
-				panelp->reshape((*panel_it)->mMinWidth, panelp->getRect().getHeight());
+				panelp->reshape((*panel_it)->mMinDim, panelp->getRect().getHeight());
 			}
-        	total_width += llround(panelp->getRect().getWidth() * (*panel_it)->getCollapseFactor());
+        	total_width += llround(panelp->getRect().getWidth() * (*panel_it)->getCollapseFactor(mOrientation));
         	// want n-1 panel gaps for n panels
 			if (panel_it != mPanels.begin())
 			{
@@ -546,11 +363,11 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 		else //VERTICAL
 		{
 			// enforce minimize size constraint by default
-			if (panelp->getRect().getHeight() < (*panel_it)->mMinHeight)
+			if (panelp->getRect().getHeight() < (*panel_it)->mMinDim)
 			{
-				panelp->reshape(panelp->getRect().getWidth(), (*panel_it)->mMinHeight);
+				panelp->reshape(panelp->getRect().getWidth(), (*panel_it)->mMinDim);
 			}
-			total_height += llround(panelp->getRect().getHeight() * (*panel_it)->getCollapseFactor());
+			total_height += llround(panelp->getRect().getHeight() * (*panel_it)->getCollapseFactor(mOrientation));
 			if (panel_it != mPanels.begin())
 			{
 				total_height += mPanelSpacing;
@@ -564,7 +381,7 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 	for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
 	{
 		// panels that are not fully visible do not count towards shrink headroom
-		if ((*panel_it)->getCollapseFactor() < 1.f) 
+		if ((*panel_it)->getCollapseFactor(mOrientation) < 1.f) 
 		{
 			continue;
 		}
@@ -577,11 +394,11 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 		{
 			if (mOrientation == HORIZONTAL)
 			{
-				shrink_headroom_total += (*panel_it)->mPanel->getRect().getWidth() - (*panel_it)->mMinWidth;
+				shrink_headroom_total += (*panel_it)->getRect().getWidth() - (*panel_it)->mMinDim;
 			}
 			else //VERTICAL
 			{
-				shrink_headroom_total += (*panel_it)->mPanel->getRect().getHeight() - (*panel_it)->mMinHeight;
+				shrink_headroom_total += (*panel_it)->getRect().getHeight() - (*panel_it)->mMinDim;
 			}
 		}
 		else
@@ -589,13 +406,13 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 			num_resizable_panels++;
 			if (mOrientation == HORIZONTAL)
 			{
-				shrink_headroom_available += (*panel_it)->mPanel->getRect().getWidth() - (*panel_it)->mMinWidth;
-				shrink_headroom_total += (*panel_it)->mPanel->getRect().getWidth() - (*panel_it)->mMinWidth;
+				shrink_headroom_available += (*panel_it)->getRect().getWidth() - (*panel_it)->mMinDim;
+				shrink_headroom_total += (*panel_it)->getRect().getWidth() - (*panel_it)->mMinDim;
 			}
 			else //VERTICAL
 			{
-				shrink_headroom_available += (*panel_it)->mPanel->getRect().getHeight() - (*panel_it)->mMinHeight;
-				shrink_headroom_total += (*panel_it)->mPanel->getRect().getHeight() - (*panel_it)->mMinHeight;
+				shrink_headroom_available += (*panel_it)->getRect().getHeight() - (*panel_it)->mMinDim;
+				shrink_headroom_total += (*panel_it)->getRect().getHeight() - (*panel_it)->mMinDim;
 			}
 		}
 	}
@@ -618,17 +435,25 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 
 	for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
 	{
-		LLPanel* panelp = (*panel_it)->mPanel;
+		LLPanel* panelp = (*panel_it);
 
 		S32 cur_width = panelp->getRect().getWidth();
 		S32 cur_height = panelp->getRect().getHeight();
-		S32 new_width = llmax((*panel_it)->mMinWidth, cur_width);
-		S32 new_height = llmax((*panel_it)->mMinHeight, cur_height); 
+		S32 new_width = cur_width;
+		S32 new_height = cur_height; 
 
+		if (mOrientation == HORIZONTAL)
+		{
+			new_width = llmax((*panel_it)->mMinDim, new_width);
+		}
+		else
+		{
+			new_height = llmax((*panel_it)->mMinDim, new_height);
+		}
 		S32 delta_size = 0;
 
 		// if panel can automatically resize (not animating, and resize flag set)...
-		if ((*panel_it)->getCollapseFactor() == 1.f 
+		if ((*panel_it)->getCollapseFactor(mOrientation) == 1.f 
 			&& (force_resize || (*panel_it)->mAutoResize) 
 			&& !(*panel_it)->mResizeBar->hasMouseCapture()) 
 		{
@@ -639,8 +464,8 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 				{
 					// shrink proportionally to amount over minimum
 					// so we can do this in one pass
-					delta_size = (shrink_headroom_available > 0) ? llround((F32)pixels_to_distribute * ((F32)(cur_width - (*panel_it)->mMinWidth) / (F32)shrink_headroom_available)) : 0;
-					shrink_headroom_available -= (cur_width - (*panel_it)->mMinWidth);
+					delta_size = (shrink_headroom_available > 0) ? llround((F32)pixels_to_distribute * ((F32)(cur_width - (*panel_it)->mMinDim) / (F32)shrink_headroom_available)) : 0;
+					shrink_headroom_available -= (cur_width - (*panel_it)->mMinDim);
 				}
 				else
 				{
@@ -649,7 +474,7 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 					num_resizable_panels--;
 				}
 				pixels_to_distribute -= delta_size;
-				new_width = llmax((*panel_it)->mMinWidth, cur_width + delta_size);
+				new_width = llmax((*panel_it)->mMinDim, cur_width + delta_size);
 			}
 			else
 			{
@@ -662,8 +487,8 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 				{
 					// shrink proportionally to amount over minimum
 					// so we can do this in one pass
-					delta_size = (shrink_headroom_available > 0) ? llround((F32)pixels_to_distribute * ((F32)(cur_height - (*panel_it)->mMinHeight) / (F32)shrink_headroom_available)) : 0;
-					shrink_headroom_available -= (cur_height - (*panel_it)->mMinHeight);
+					delta_size = (shrink_headroom_available > 0) ? llround((F32)pixels_to_distribute * ((F32)(cur_height - (*panel_it)->mMinDim) / (F32)shrink_headroom_available)) : 0;
+					shrink_headroom_available -= (cur_height - (*panel_it)->mMinDim);
 				}
 				else
 				{
@@ -671,7 +496,7 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 					num_resizable_panels--;
 				}
 				pixels_to_distribute -= delta_size;
-				new_height = llmax((*panel_it)->mMinHeight, cur_height + delta_size);
+				new_height = llmax((*panel_it)->mMinDim, cur_height + delta_size);
 			}
 			else
 			{
@@ -712,11 +537,11 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 
 		if (mOrientation == HORIZONTAL)
 		{
-			cur_x += llround(new_width * (*panel_it)->getCollapseFactor()) + mPanelSpacing;
+			cur_x += llround(new_width * (*panel_it)->getCollapseFactor(mOrientation)) + mPanelSpacing;
 		}
 		else //VERTICAL
 		{
-			cur_y -= llround(new_height * (*panel_it)->getCollapseFactor()) + mPanelSpacing;
+			cur_y -= llround(new_height * (*panel_it)->getCollapseFactor(mOrientation)) + mPanelSpacing;
 		}
 	}
 
@@ -724,19 +549,19 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 	LLResizeBar* last_resize_bar = NULL;
 	for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
 	{
-		LLPanel* panelp = (*panel_it)->mPanel;
+		LLPanel* panelp = (*panel_it);
 
 		if (mOrientation == HORIZONTAL)
 		{
 			(*panel_it)->mResizeBar->setResizeLimits(
-				(*panel_it)->mMinWidth, 
-				(*panel_it)->mMinWidth + shrink_headroom_total);
+				(*panel_it)->mMinDim, 
+				(*panel_it)->mMinDim + shrink_headroom_total);
 		}
 		else //VERTICAL
 		{
 			(*panel_it)->mResizeBar->setResizeLimits(
-				(*panel_it)->mMinHeight, 
-				(*panel_it)->mMinHeight + shrink_headroom_total);
+				(*panel_it)->mMinDim, 
+				(*panel_it)->mMinDim + shrink_headroom_total);
 		}
 
 		// toggle resize bars based on panel visibility, resizability, etc
@@ -772,14 +597,14 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 } // end LLLayoutStack::updateLayout
 
 
-LLLayoutStack::LayoutPanel* LLLayoutStack::findEmbeddedPanel(LLPanel* panelp) const
+LLLayoutPanel* LLLayoutStack::findEmbeddedPanel(LLPanel* panelp) const
 {
 	if (!panelp) return NULL;
 
 	e_panel_list_t::const_iterator panel_it;
 	for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
 	{
-		if ((*panel_it)->mPanel == panelp)
+		if ((*panel_it) == panelp)
 		{
 			return *panel_it;
 		}
@@ -787,15 +612,15 @@ LLLayoutStack::LayoutPanel* LLLayoutStack::findEmbeddedPanel(LLPanel* panelp) co
 	return NULL;
 }
 
-LLLayoutStack::LayoutPanel* LLLayoutStack::findEmbeddedPanelByName(const std::string& name) const
+LLLayoutPanel* LLLayoutStack::findEmbeddedPanelByName(const std::string& name) const
 {
-	LayoutPanel* result = NULL;
+	LLLayoutPanel* result = NULL;
 
 	for (e_panel_list_t::const_iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
 	{
-		LayoutPanel* p = *panel_it;
+		LLLayoutPanel* p = *panel_it;
 
-		if (p->mPanel->getName() == name)
+		if (p->getName() == name)
 		{
 			result = p;
 			break;
@@ -816,9 +641,7 @@ void LLLayoutStack::calcMinExtents()
 	{
 		if (mOrientation == HORIZONTAL)
 		{
-			mMinHeight = llmax(	mMinHeight, 
-								(*panel_it)->mMinHeight);
-            mMinWidth += (*panel_it)->mMinWidth;
+            mMinWidth += (*panel_it)->mMinDim;
 			if (panel_it != mPanels.begin())
 			{
 				mMinWidth += mPanelSpacing;
@@ -826,9 +649,7 @@ void LLLayoutStack::calcMinExtents()
 		}
 		else //VERTICAL
 		{
-	        mMinWidth = llmax(	mMinWidth, 
-								(*panel_it)->mMinWidth);
-			mMinHeight += (*panel_it)->mMinHeight;
+			mMinHeight += (*panel_it)->mMinDim;
 			if (panel_it != mPanels.begin())
 			{
 				mMinHeight += mPanelSpacing;
@@ -837,6 +658,37 @@ void LLLayoutStack::calcMinExtents()
 	}
 }
 
+void LLLayoutStack::createResizeBars()
+{
+	for (e_panel_list_t::iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
+	{
+		LLLayoutPanel* lp = (*panel_it);
+		if (lp->mResizeBar == NULL)
+		{
+			LLResizeBar::Side side = (mOrientation == HORIZONTAL) ? LLResizeBar::RIGHT : LLResizeBar::BOTTOM;
+			LLRect resize_bar_rect = getRect();
+
+			LLResizeBar::Params resize_params;
+			resize_params.name("resize");
+			resize_params.resizing_view(lp);
+			resize_params.min_size(lp->mMinDim);
+			resize_params.side(side);
+			resize_params.snapping_enabled(false);
+			LLResizeBar* resize_bar = LLUICtrlFactory::create<LLResizeBar>(resize_params);
+			lp->mResizeBar = resize_bar;
+			LLView::addChild(resize_bar, 0);
+
+			// bring all resize bars to the front so that they are clickable even over the panels
+			// with a bit of overlap
+			for (e_panel_list_t::iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
+			{
+				LLResizeBar* resize_barp = (*panel_it)->mResizeBar;
+				sendChildToFront(resize_barp);
+			}
+		}
+	}
+}
+
 // update layout stack animations, etc. once per frame
 // NOTE: we use this to size world view based on animating UI, *before* we draw the UI
 // we might still need to call updateLayout during UI draw phase, in case UI elements
diff --git a/indra/llui/lllayoutstack.h b/indra/llui/lllayoutstack.h
index e454454fe2..9bcfa2c957 100644
--- a/indra/llui/lllayoutstack.h
+++ b/indra/llui/lllayoutstack.h
@@ -34,13 +34,18 @@
 #ifndef LL_LLLAYOUTSTACK_H
 #define LL_LLLAYOUTSTACK_H
 
-#include "llview.h"
+#include "llpanel.h"
 
 class LLPanel;
 
+class LLLayoutPanel;
+
 class LLLayoutStack : public LLView, public LLInstanceTracker<LLLayoutStack>
 {
 public:
+	struct LayoutStackRegistry : public LLChildRegistry<LayoutStackRegistry>
+	{};
+
 	struct Params : public LLInitParam::Block<Params, LLView::Params>
 	{
 		Optional<std::string>	orientation;
@@ -51,6 +56,8 @@ public:
 		Params();
 	};
 
+	typedef LayoutStackRegistry child_registry_t;
+
 	typedef enum e_layout_orientation
 	{
 		HORIZONTAL,
@@ -62,6 +69,7 @@ public:
 	/*virtual*/ void draw();
 	/*virtual*/ void removeChild(LLView*);
 	/*virtual*/ BOOL postBuild();
+	/*virtual*/ bool addChild(LLView* child, S32 tab_group = 0);
 
 	static LLView* fromXML(LLXMLNodePtr node, LLView *parent, LLXMLNodePtr output_node = NULL);
 
@@ -74,7 +82,7 @@ public:
 		ANIMATE
 	} EAnimate;
 
-	void addPanel(LLPanel* panel, S32 min_width, S32 min_height, S32 max_width, S32 max_height, BOOL auto_resize, BOOL user_resize, EAnimate animate = NO_ANIMATE, S32 index = S32_MAX);
+	void addPanel(LLLayoutPanel* panel, EAnimate animate = NO_ANIMATE);
 	void removePanel(LLPanel* panel);
 	void collapsePanel(LLPanel* panel, BOOL collapsed = TRUE);
 	S32 getNumPanels() { return mPanels.size(); }
@@ -83,20 +91,18 @@ public:
 	void setPanelUserResize(const std::string& panel_name, BOOL user_resize);
 	
 	/**
-	 * Gets minimal width and/or height of the specified by name panel.
+	 * Gets minimal dimension along layout_stack axis of the specified by name panel.
 	 *
-	 * If it is necessary to get only the one dimension pass NULL for another one.
 	 * @returns true if specified by panel_name internal panel exists, false otherwise.
 	 */
-	bool getPanelMinSize(const std::string& panel_name, S32* min_widthp, S32* min_heightp);
+	bool getPanelMinSize(const std::string& panel_name, S32* min_dimp);
 
 	/**
-	 * Gets maximal width and/or height of the specified by name panel.
+	 * Gets maximal dimension along layout_stack axis of the specified by name panel.
 	 *
-	 * If it is necessary to get only the one dimension pass NULL for another one.
 	 * @returns true if specified by panel_name internal panel exists, false otherwise.
 	 */
-	bool getPanelMaxSize(const std::string& panel_name, S32* max_width, S32* max_height);
+	bool getPanelMaxSize(const std::string& panel_name, S32* max_dim);
 	
 	void updateLayout(BOOL force_resize = FALSE);
 	
@@ -111,19 +117,18 @@ protected:
 	friend class LLUICtrlFactory;
 
 private:
-	struct LayoutPanel;
-
+	void createResizeBars();
 	void calcMinExtents();
 	S32 getDefaultHeight(S32 cur_height);
 	S32 getDefaultWidth(S32 cur_width);
 
 	const ELayoutOrientation mOrientation;
 
-	typedef std::vector<LayoutPanel*> e_panel_list_t;
+	typedef std::vector<LLLayoutPanel*> e_panel_list_t;
 	e_panel_list_t mPanels;
 
-	LayoutPanel* findEmbeddedPanel(LLPanel* panelp) const;
-	LayoutPanel* findEmbeddedPanelByName(const std::string& name) const;
+	LLLayoutPanel* findEmbeddedPanel(LLPanel* panelp) const;
+	LLLayoutPanel* findEmbeddedPanelByName(const std::string& name) const;
 
 	S32 mMinWidth;  // calculated by calcMinExtents
 	S32 mMinHeight;  // calculated by calcMinExtents
@@ -135,4 +140,49 @@ private:
 	bool mClip;
 }; // end class LLLayoutStack
 
+class LLLayoutPanel : public LLPanel
+{
+friend LLLayoutStack;
+friend class LLUICtrlFactory;
+public:
+	struct Params : public LLInitParam::Block<Params, LLPanel::Params>
+	{
+		Optional<S32>			min_dim,
+								max_dim;
+		Optional<bool>			user_resize,
+								auto_resize;
+
+		Params()
+		:	min_dim("min_dim", 0),
+			max_dim("max_dim", 0),
+			user_resize("user_resize", true),
+			auto_resize("auto_resize", true)
+		{
+			addSynonym(min_dim, "min_width");
+			addSynonym(min_dim, "min_height");
+			addSynonym(max_dim, "max_width");
+			addSynonym(max_dim, "max_height");
+		}
+	};
+
+	~LLLayoutPanel();
+
+	void initFromParams(const Params& p);
+protected:
+	LLLayoutPanel(const Params& p)	;
+
+	
+	F32 getCollapseFactor(LLLayoutStack::ELayoutOrientation orientation);
+
+	S32 mMinDim;
+	S32 mMaxDim;
+	BOOL mAutoResize;
+	BOOL mUserResize;
+	BOOL mCollapsed;
+	class LLResizeBar* mResizeBar;
+	F32 mVisibleAmt;
+	F32 mCollapseAmt;
+};
+
+
 #endif
diff --git a/indra/llui/lllineeditor.cpp b/indra/llui/lllineeditor.cpp
index c93ca1af88..e6a07b02cc 100644
--- a/indra/llui/lllineeditor.cpp
+++ b/indra/llui/lllineeditor.cpp
@@ -1277,7 +1277,7 @@ BOOL LLLineEditor::handleSpecialKey(KEY key, MASK mask)
 			if( mCurrentHistoryLine > mLineHistory.begin() )
 			{
 				mText.assign( *(--mCurrentHistoryLine) );
-				setCursor(llmin((S32)mText.length(), getCursor()));
+				setCursorToEnd();
 			}
 			else
 			{
@@ -1294,7 +1294,7 @@ BOOL LLLineEditor::handleSpecialKey(KEY key, MASK mask)
 			if( !mLineHistory.empty() && mCurrentHistoryLine < mLineHistory.end() - 1 )
 			{
 				mText.assign( *(++mCurrentHistoryLine) );
-				setCursor(llmin((S32)mText.length(), getCursor()));
+				setCursorToEnd();
 			}
 			else
 			{
diff --git a/indra/llui/llpanel.cpp b/indra/llui/llpanel.cpp
index 51c8f6c743..4471f315c0 100644
--- a/indra/llui/llpanel.cpp
+++ b/indra/llui/llpanel.cpp
@@ -389,8 +389,7 @@ LLView* LLPanel::fromXML(LLXMLNodePtr node, LLView* parent, LLXMLNodePtr output_
 
 	LLPanel* panelp = NULL;
 	
-	{
-		LLFastTimer timer(FTM_PANEL_CONSTRUCTION);
+	{	LLFastTimer _(FTM_PANEL_CONSTRUCTION);
 		
 		if(!class_attr.empty())
 		{
@@ -512,6 +511,8 @@ BOOL LLPanel::initPanelXML(LLXMLNodePtr node, LLView *parent, LLXMLNodePtr outpu
 			setXMLFilename(xml_filename);
 		}
 
+		LLXUIParser parser;
+
 		if (!xml_filename.empty())
 		{
 			LLUICtrlFactory::instance().pushFileName(xml_filename);
@@ -521,12 +522,11 @@ BOOL LLPanel::initPanelXML(LLXMLNodePtr node, LLView *parent, LLXMLNodePtr outpu
 			{
 				//if we are exporting, we want to export the current xml
 				//not the referenced xml
-				LLXUIParser::instance().readXUI(node, params, LLUICtrlFactory::getInstance()->getCurFileName());
+				parser.readXUI(node, params, LLUICtrlFactory::getInstance()->getCurFileName());
 				Params output_params(params);
 				setupParamsForExport(output_params, parent);
 				output_node->setName(node->getName()->mString);
-				LLXUIParser::instance().writeXUI(
-					output_node, output_params, &default_params);
+				parser.writeXUI(output_node, output_params, &default_params);
 				return TRUE;
 			}
 		
@@ -537,7 +537,7 @@ BOOL LLPanel::initPanelXML(LLXMLNodePtr node, LLView *parent, LLXMLNodePtr outpu
 				return FALSE;
 			}
 
-			LLXUIParser::instance().readXUI(referenced_xml, params, LLUICtrlFactory::getInstance()->getCurFileName());
+			parser.readXUI(referenced_xml, params, LLUICtrlFactory::getInstance()->getCurFileName());
 
 			// add children using dimensions from referenced xml for consistent layout
 			setShape(params.rect);
@@ -547,15 +547,14 @@ BOOL LLPanel::initPanelXML(LLXMLNodePtr node, LLView *parent, LLXMLNodePtr outpu
 		}
 
 		// ask LLUICtrlFactory for filename, since xml_filename might be empty
-		LLXUIParser::instance().readXUI(node, params, LLUICtrlFactory::getInstance()->getCurFileName());
+		parser.readXUI(node, params, LLUICtrlFactory::getInstance()->getCurFileName());
 
 		if (output_node)
 		{
 			Params output_params(params);
 			setupParamsForExport(output_params, parent);
 			output_node->setName(node->getName()->mString);
-			LLXUIParser::instance().writeXUI(
-				output_node, output_params, &default_params);
+			parser.writeXUI(output_node, output_params, &default_params);
 		}
 		
 		params.from_xui = true;
diff --git a/indra/llui/llrngwriter.cpp b/indra/llui/llrngwriter.cpp
index 7e3d4b92d3..718c10d2f8 100644
--- a/indra/llui/llrngwriter.cpp
+++ b/indra/llui/llrngwriter.cpp
@@ -36,10 +36,15 @@
 #include "lluicolor.h"
 #include "lluictrlfactory.h"
 
+static 	LLInitParam::Parser::parser_read_func_map_t sReadFuncs;
+static 	LLInitParam::Parser::parser_write_func_map_t sWriteFuncs;
+static 	LLInitParam::Parser::parser_inspect_func_map_t sInspectFuncs;
+
 //
 // LLRNGWriter - writes Relax NG schema files based on a param block
 //
 LLRNGWriter::LLRNGWriter()
+: Parser(sReadFuncs, sWriteFuncs, sInspectFuncs)
 {
 	// register various callbacks for inspecting the contents of a param block
 	registerInspectFunc<bool>(boost::bind(&LLRNGWriter::writeAttribute, this, "boolean", _1, _2, _3, _4));
diff --git a/indra/llui/llscrolllistctrl.cpp b/indra/llui/llscrolllistctrl.cpp
index d356f061f9..844278e41c 100644
--- a/indra/llui/llscrolllistctrl.cpp
+++ b/indra/llui/llscrolllistctrl.cpp
@@ -2568,7 +2568,8 @@ BOOL	LLScrollListCtrl::canDeselect() const
 void LLScrollListCtrl::addColumn(const LLSD& column, EAddPosition pos)
 {
 	LLScrollListColumn::Params p;
-	LLParamSDParser::instance().readSD(column, p);
+	LLParamSDParser parser;
+	parser.readSD(column, p);
 	addColumn(p, pos);
 }
 
@@ -2759,7 +2760,8 @@ LLScrollListItem* LLScrollListCtrl::addElement(const LLSD& element, EAddPosition
 {
 	LLFastTimer _(FTM_ADD_SCROLLLIST_ELEMENT);
 	LLScrollListItem::Params item_params;
-	LLParamSDParser::instance().readSD(element, item_params);
+	LLParamSDParser parser;
+	parser.readSD(element, item_params);
 	item_params.userdata = userdata;
 	return addRow(item_params, pos);
 }
diff --git a/indra/llui/llsdparam.cpp b/indra/llui/llsdparam.cpp
index 7d37127584..69976004e6 100644
--- a/indra/llui/llsdparam.cpp
+++ b/indra/llui/llsdparam.cpp
@@ -36,31 +36,40 @@
 // Project includes
 #include "llsdparam.h"
 
+static 	LLInitParam::Parser::parser_read_func_map_t sReadFuncs;
+static 	LLInitParam::Parser::parser_write_func_map_t sWriteFuncs;
+static 	LLInitParam::Parser::parser_inspect_func_map_t sInspectFuncs;
+
 //
 // LLParamSDParser
 //
 LLParamSDParser::LLParamSDParser()
+: Parser(sReadFuncs, sWriteFuncs, sInspectFuncs)
 {
 	using boost::bind;
 
-	registerParserFuncs<S32>(readS32, bind(&LLParamSDParser::writeTypedValue<S32>, this, _1, _2));
-	registerParserFuncs<U32>(readU32, bind(&LLParamSDParser::writeU32Param, this, _1, _2));
-	registerParserFuncs<F32>(readF32, bind(&LLParamSDParser::writeTypedValue<F32>, this, _1, _2));
-	registerParserFuncs<F64>(readF64, bind(&LLParamSDParser::writeTypedValue<F64>, this, _1, _2));
-	registerParserFuncs<bool>(readBool, bind(&LLParamSDParser::writeTypedValue<F32>, this, _1, _2));
-	registerParserFuncs<std::string>(readString, bind(&LLParamSDParser::writeTypedValue<std::string>, this, _1, _2));
-	registerParserFuncs<LLUUID>(readUUID, bind(&LLParamSDParser::writeTypedValue<LLUUID>, this, _1, _2));
-	registerParserFuncs<LLDate>(readDate, bind(&LLParamSDParser::writeTypedValue<LLDate>, this, _1, _2));
-	registerParserFuncs<LLURI>(readURI, bind(&LLParamSDParser::writeTypedValue<LLURI>, this, _1, _2));
-	registerParserFuncs<LLSD>(readSD, bind(&LLParamSDParser::writeTypedValue<LLSD>, this, _1, _2));
+	if (sReadFuncs.empty())
+	{
+		registerParserFuncs<S32>(readS32, &LLParamSDParser::writeTypedValue<S32>);
+		registerParserFuncs<U32>(readU32, &LLParamSDParser::writeU32Param);
+		registerParserFuncs<F32>(readF32, &LLParamSDParser::writeTypedValue<F32>);
+		registerParserFuncs<F64>(readF64, &LLParamSDParser::writeTypedValue<F64>);
+		registerParserFuncs<bool>(readBool, &LLParamSDParser::writeTypedValue<F32>);
+		registerParserFuncs<std::string>(readString, &LLParamSDParser::writeTypedValue<std::string>);
+		registerParserFuncs<LLUUID>(readUUID, &LLParamSDParser::writeTypedValue<LLUUID>);
+		registerParserFuncs<LLDate>(readDate, &LLParamSDParser::writeTypedValue<LLDate>);
+		registerParserFuncs<LLURI>(readURI, &LLParamSDParser::writeTypedValue<LLURI>);
+		registerParserFuncs<LLSD>(readSD, &LLParamSDParser::writeTypedValue<LLSD>);
+	}
 }
 
 // special case handling of U32 due to ambiguous LLSD::assign overload
-bool LLParamSDParser::writeU32Param(const void* val_ptr, const parser_t::name_stack_t& name_stack)
+bool LLParamSDParser::writeU32Param(LLParamSDParser::parser_t& parser, const void* val_ptr, const parser_t::name_stack_t& name_stack)
 {
-	if (!mWriteSD) return false;
+	LLParamSDParser& sdparser = static_cast<LLParamSDParser&>(parser);
+	if (!sdparser.mWriteSD) return false;
 	
-	LLSD* sd_to_write = getSDWriteNode(name_stack);
+	LLSD* sd_to_write = sdparser.getSDWriteNode(name_stack);
 	if (!sd_to_write) return false;
 
 	sd_to_write->assign((S32)*((const U32*)val_ptr));
diff --git a/indra/llui/llsdparam.h b/indra/llui/llsdparam.h
index d8af3c9bce..83c958d67d 100644
--- a/indra/llui/llsdparam.h
+++ b/indra/llui/llsdparam.h
@@ -37,17 +37,14 @@
 #include "llinitparam.h"
 
 class LLParamSDParser 
-:	public LLInitParam::Parser, 
-	public LLSingleton<LLParamSDParser>
+:	public LLInitParam::Parser
 {
 LOG_CLASS(LLParamSDParser);
 
 typedef LLInitParam::Parser parser_t;
 
-protected:
-	LLParamSDParser();
-	friend class LLSingleton<LLParamSDParser>;
 public:
+	LLParamSDParser();
 	void readSD(const LLSD& sd, LLInitParam::BaseBlock& block, bool silent = false);
 	void writeSD(LLSD& sd, const LLInitParam::BaseBlock& block);
 
@@ -57,11 +54,12 @@ private:
 	void readSDValues(const LLSD& sd, LLInitParam::BaseBlock& block);
 
 	template<typename T>
-	bool writeTypedValue(const void* val_ptr, const parser_t::name_stack_t& name_stack)
+	static bool writeTypedValue(Parser& parser, const void* val_ptr, const parser_t::name_stack_t& name_stack)
 	{
-		if (!mWriteSD) return false;
+		LLParamSDParser& sdparser = static_cast<LLParamSDParser&>(parser);
+		if (!sdparser.mWriteSD) return false;
 		
-		LLSD* sd_to_write = getSDWriteNode(name_stack);
+		LLSD* sd_to_write = sdparser.getSDWriteNode(name_stack);
 		if (!sd_to_write) return false;
 
 		sd_to_write->assign(*((const T*)val_ptr));
@@ -70,7 +68,7 @@ private:
 
 	LLSD* getSDWriteNode(const parser_t::name_stack_t& name_stack);
 
-	bool writeU32Param(const void* value_ptr, const parser_t::name_stack_t& name_stack);
+	static bool writeU32Param(Parser& parser, const void* value_ptr, const parser_t::name_stack_t& name_stack);
 
 	static bool readS32(Parser& parser, void* val_ptr);
 	static bool readU32(Parser& parser, void* val_ptr);
diff --git a/indra/llui/llui.cpp b/indra/llui/llui.cpp
index 5d8b628776..85fdfbb312 100644
--- a/indra/llui/llui.cpp
+++ b/indra/llui/llui.cpp
@@ -1802,7 +1802,8 @@ void LLUI::setupPaths()
 	LLXMLNodePtr root;
 	BOOL success  = LLXMLNode::parseFile(filename, root, NULL);
 	Paths paths;
-	LLXUIParser::instance().readXUI(root, paths, filename);
+	LLXUIParser parser;
+	parser.readXUI(root, paths, filename);
 
 	sXUIPaths.clear();
 	
diff --git a/indra/llui/lluicolortable.cpp b/indra/llui/lluicolortable.cpp
index 1b64ef3abe..88140f1a49 100644
--- a/indra/llui/lluicolortable.cpp
+++ b/indra/llui/lluicolortable.cpp
@@ -243,7 +243,8 @@ void LLUIColorTable::saveUserSettings() const
 	}
 
 	LLXMLNodePtr output_node = new LLXMLNode("colors", false);
-	LLXUIParser::instance().writeXUI(output_node, params);
+	LLXUIParser parser;
+	parser.writeXUI(output_node, params);
 
 	if(!output_node->isNull())
 	{
@@ -309,7 +310,8 @@ bool LLUIColorTable::loadFromFilename(const std::string& filename, string_color_
 	}
 
 	Params params;
-	LLXUIParser::instance().readXUI(root, params, filename);
+	LLXUIParser parser;
+	parser.readXUI(root, params, filename);
 
 	if(params.validateBlock())
 	{
diff --git a/indra/llui/lluictrlfactory.cpp b/indra/llui/lluictrlfactory.cpp
index ee700ee6eb..2a2fa21ec0 100644
--- a/indra/llui/lluictrlfactory.cpp
+++ b/indra/llui/lluictrlfactory.cpp
@@ -103,7 +103,8 @@ void LLUICtrlFactory::loadWidgetTemplate(const std::string& widget_tag, LLInitPa
 	if (!full_filename.empty())
 	{
 		LLUICtrlFactory::instance().pushFileName(full_filename);
-		LLSimpleXUIParser::instance().readXUI(full_filename, block);
+		LLSimpleXUIParser parser;
+		parser.readXUI(full_filename, block);
 		LLUICtrlFactory::instance().popFileName();
 	}
 }
diff --git a/indra/llui/lluictrlfactory.h b/indra/llui/lluictrlfactory.h
index 207f74c89a..6b5d055b78 100644
--- a/indra/llui/lluictrlfactory.h
+++ b/indra/llui/lluictrlfactory.h
@@ -273,7 +273,8 @@ private:
 
 		typename T::Params params(getDefaultParams<T>());
 
-		LLXUIParser::instance().readXUI(node, params, LLUICtrlFactory::getInstance()->getCurFileName());
+		LLXUIParser parser;
+		parser.readXUI(node, params, LLUICtrlFactory::getInstance()->getCurFileName());
 
 		if (output_node)
 		{
@@ -283,8 +284,7 @@ private:
 			// Export only the differences between this any default params
 			typename T::Params default_params(getDefaultParams<T>());
 			copyName(node, output_node);
-			LLXUIParser::instance().writeXUI(
-				output_node, output_params, &default_params);
+			parser.writeXUI(output_node, output_params, &default_params);
 		}
 
 		// Apply layout transformations, usually munging rect
diff --git a/indra/llui/llview.cpp b/indra/llui/llview.cpp
index 3ee4a85de0..878def07ae 100644
--- a/indra/llui/llview.cpp
+++ b/indra/llui/llview.cpp
@@ -108,11 +108,7 @@ LLView::Params::Params()
 	left_pad("left_pad"),
 	left_delta("left_delta", S32_MAX),
 	from_xui("from_xui", false),
-	user_resize("user_resize"),
-	auto_resize("auto_resize"),
 	needs_translate("translate"),
-	min_width("min_width"),
-	max_width("max_width"),
 	xmlns("xmlns"),
 	xmlns_xsi("xmlns:xsi"),
 	xsi_schemaLocation("xsi:schemaLocation"),
diff --git a/indra/llui/llview.h b/indra/llui/llview.h
index 0f796fb408..fa4f4c8ae2 100644
--- a/indra/llui/llview.h
+++ b/indra/llui/llview.h
@@ -145,11 +145,7 @@ public:
 									left_delta;		// from last left to my left
 
 		//FIXME: get parent context involved in parsing traversal
-		Ignored						user_resize,		// nested attribute for LLLayoutPanel
-									auto_resize,		// nested attribute for LLLayoutPanel
-									needs_translate,	// cue for translation tools
-									min_width,			// nested attribute for LLLayoutPanel
-									max_width,			// nested attribute for LLLayoutPanel
+		Ignored						needs_translate,	// cue for translation tools
 									xmlns,				// xml namespace
 									xmlns_xsi,			// xml namespace
 									xsi_schemaLocation,	// xml schema