merge changes for latest viewer-development

30 files changed, 933 insertions, 566 deletions

diff --git a/indra/llui/llaccordionctrltab.cpp b/indra/llui/llaccordionctrltab.cpp
index 7a5f9f9fd6..c025cd7939 100644
--- a/indra/llui/llaccordionctrltab.cpp
+++ b/indra/llui/llaccordionctrltab.cpp
@@ -976,7 +976,7 @@ void LLAccordionCtrlTab::drawChild(const LLRect& root_rect,LLView* child)
 			gGL.matrixMode(LLRender::MM_MODELVIEW);
 			LLUI::pushMatrix();
 			{
-				LLUI::translate((F32)child->getRect().mLeft, (F32)child->getRect().mBottom, 0.f);
+				LLUI::translate((F32)child->getRect().mLeft, (F32)child->getRect().mBottom);
 				child->draw();
 
 			}
diff --git a/indra/llui/llbutton.cpp b/indra/llui/llbutton.cpp
index f0d92d597a..705fe16559 100644
--- a/indra/llui/llbutton.cpp
+++ b/indra/llui/llbutton.cpp
@@ -908,9 +908,9 @@ void LLButton::draw()
 		// Not sure if it is really needed. Probably S32_MAX should be always passed as max_chars.
 		mLastDrawCharsCount = mGLFont->render(label, 0,
 			(F32)x,
-			(F32)(mBottomVPad + y_offset),
+			(F32)(getRect().getHeight() / 2 + mBottomVPad),
 			label_color % alpha,
-			mHAlign, LLFontGL::BOTTOM,
+			mHAlign, LLFontGL::VCENTER,
 			LLFontGL::NORMAL,
 			mDropShadowedText ? LLFontGL::DROP_SHADOW_SOFT : LLFontGL::NO_SHADOW,
 			S32_MAX, text_width,
diff --git a/indra/llui/llclipboard.cpp b/indra/llui/llclipboard.cpp
index 6910b962a1..14173fdbb0 100644
--- a/indra/llui/llclipboard.cpp
+++ b/indra/llui/llclipboard.cpp
@@ -34,109 +34,113 @@
 #include "llview.h"
 #include "llwindow.h"
 
-// Global singleton
-LLClipboard gClipboard;
-
-
-LLClipboard::LLClipboard()
+LLClipboard::LLClipboard() :
+	mGeneration(0)
 {
-	mSourceItem = NULL;
+	reset();
 }
 
-
 LLClipboard::~LLClipboard()
 {
+	reset();
 }
 
-
-void LLClipboard::copyFromSubstring(const LLWString &src, S32 pos, S32 len, const LLUUID& source_id )
+void LLClipboard::reset()
 {
-	mSourceID = source_id;
-	mString = src.substr(pos, len);
-	LLView::getWindow()->copyTextToClipboard( mString );
+	// Increment the clipboard count
+	mGeneration++;
+	// Clear the clipboard
+	mObjects.clear();
+	mCutMode = false;
+	mString = LLWString();
 }
 
-void LLClipboard::copyFromString(const LLWString &src, const LLUUID& source_id )
+// Copy the input uuid to the LL clipboard
+bool LLClipboard::copyToClipboard(const LLUUID& src, const LLAssetType::EType type)
 {
-	mSourceID = source_id;
-	mString = src;
-	LLView::getWindow()->copyTextToClipboard( mString );
+	reset();
+	return addToClipboard(src, type);
 }
 
-const LLWString& LLClipboard::getPasteWString( LLUUID* source_id )
+// Add the input uuid to the LL clipboard
+// Convert the uuid to string and concatenate that string to the system clipboard if legit
+bool LLClipboard::addToClipboard(const LLUUID& src, const LLAssetType::EType type)
 {
-	if( mSourceID.notNull() )
+	bool res = false;
+	if (src.notNull())
 	{
-		LLWString temp_string;
-		LLView::getWindow()->pasteTextFromClipboard(temp_string);
-
-		if( temp_string != mString )
+		res = true;
+		if (LLAssetType::lookupIsAssetIDKnowable(type))
 		{
-			mSourceID.setNull();
-			mString = temp_string;
+			LLWString source = utf8str_to_wstring(src.asString());
+			res = addToClipboard(source, 0, source.size());
+		}
+		if (res)
+		{
+			mObjects.push_back(src);
+			mGeneration++;
 		}
 	}
-	else
-	{
-		LLView::getWindow()->pasteTextFromClipboard(mString);
-	}
+	return res;
+}
 
-	if( source_id )
+bool LLClipboard::pasteFromClipboard(std::vector<LLUUID>& inv_objects) const
+{
+	bool res = false;
+	S32 count = mObjects.size();
+	if (count > 0)
 	{
-		*source_id = mSourceID;
+		res = true;
+		inv_objects.clear();
+		for (S32 i = 0; i < count; i++)
+		{
+			inv_objects.push_back(mObjects[i]);
+		}
 	}
-
-	return mString;
+	return res;
 }
 
+// Returns true if the LL Clipboard has pasteable items in it
+bool LLClipboard::hasContents() const
+{
+	return (mObjects.size() > 0);
+}
 
-BOOL LLClipboard::canPasteString() const
+// Returns true if the input uuid is in the list of clipboard objects
+bool LLClipboard::isOnClipboard(const LLUUID& object) const
 {
-	return LLView::getWindow()->isClipboardTextAvailable();
+	std::vector<LLUUID>::const_iterator iter = std::find(mObjects.begin(), mObjects.end(), object);
+	return (iter != mObjects.end());
 }
 
+// Copy the input string to the LL and the system clipboard
+bool LLClipboard::copyToClipboard(const LLWString &src, S32 pos, S32 len, bool use_primary)
+{
+	return addToClipboard(src, pos, len, use_primary);
+}
 
-void LLClipboard::copyFromPrimarySubstring(const LLWString &src, S32 pos, S32 len, const LLUUID& source_id )
+// Concatenate the input string to the LL and the system clipboard
+bool LLClipboard::addToClipboard(const LLWString &src, S32 pos, S32 len, bool use_primary)
 {
-	mSourceID = source_id;
 	mString = src.substr(pos, len);
-	LLView::getWindow()->copyTextToPrimary( mString );
+	return (use_primary ? LLView::getWindow()->copyTextToPrimary(mString) : LLView::getWindow()->copyTextToClipboard(mString));
 }
 
-
-const LLWString& LLClipboard::getPastePrimaryWString( LLUUID* source_id )
+// Copy the System clipboard to the output string.
+// Manage the LL Clipboard / System clipboard consistency
+bool LLClipboard::pasteFromClipboard(LLWString &dst, bool use_primary)
 {
-	if( mSourceID.notNull() )
-	{
-		LLWString temp_string;
-		LLView::getWindow()->pasteTextFromPrimary(temp_string);
-
-		if( temp_string != mString )
-		{
-			mSourceID.setNull();
-			mString = temp_string;
-		}
-	}
-	else
-	{
-		LLView::getWindow()->pasteTextFromPrimary(mString);
-	}
-
-	if( source_id )
+	bool res = (use_primary ? LLView::getWindow()->pasteTextFromPrimary(dst) : LLView::getWindow()->pasteTextFromClipboard(dst));
+	if (res)
 	{
-		*source_id = mSourceID;
+		mString = dst;
 	}
-
-	return mString;
+	return res;
 }
 
-
-BOOL LLClipboard::canPastePrimaryString() const
+// Return true if there's something on the System clipboard
+bool LLClipboard::isTextAvailable(bool use_primary) const
 {
-	return LLView::getWindow()->isPrimaryTextAvailable();
+	return (use_primary ? LLView::getWindow()->isPrimaryTextAvailable() : LLView::getWindow()->isClipboardTextAvailable());
 }
 
-void LLClipboard::setSourceObject(const LLUUID& source_id, LLAssetType::EType type) 
-{
-	mSourceItem = new LLInventoryObject (source_id, LLUUID::null, type, "");
-}
diff --git a/indra/llui/llclipboard.h b/indra/llui/llclipboard.h
index 9371b94284..fd2e7610df 100644
--- a/indra/llui/llclipboard.h
+++ b/indra/llui/llclipboard.h
@@ -27,46 +27,68 @@
 #ifndef LL_LLCLIPBOARD_H
 #define LL_LLCLIPBOARD_H
 
+#include <boost/function.hpp>
 
 #include "llstring.h"
 #include "lluuid.h"
 #include "stdenums.h"
+#include "llsingleton.h"
+#include "llassettype.h"
 #include "llinventory.h"
 
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// Class LLClipboard
+//
+// This class is used to cut/copy/paste text strings and inventory items around 
+// the world. Use LLClipboard::instance().method() to use its methods.
+// Note that the text and UUIDs are loosely coupled only. There are few cases
+// where the viewer does offer a serialized version of the UUID on the clipboard.
+// In those case, the text is overridden when copying/cutting the item. 
+// In all other cases, the text and the UUIDs are very much independent.
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-class LLClipboard
+class LLClipboard : public LLSingleton<LLClipboard>
 {
 public:
 	LLClipboard();
 	~LLClipboard();
+	
+	// Clears the clipboard
+	void reset();
+	// Returns the state of the clipboard so client can know if it has been modified (comparing with tracked state)
+	int	getGeneration() const { return mGeneration; }
 
-	/* We support two flavors of clipboard.  The default is the explicitly
-	   copy-and-pasted clipboard.  The second is the so-called 'primary' clipboard
-	   which is implicitly copied upon selection on platforms which expect this
-	   (i.e. X11/Linux). */
-
-	void		copyFromSubstring(const LLWString &copy_from, S32 pos, S32 len, const LLUUID& source_id = LLUUID::null );
-	void		copyFromString(const LLWString &copy_from, const LLUUID& source_id = LLUUID::null );
-	BOOL		canPasteString() const;
-	const LLWString&	getPasteWString(LLUUID* source_id = NULL);
+	// Text strings management:
+	// ------------------------
+	// We support two flavors of text clipboards. The default is the explicitly
+	// copy-and-pasted clipboard. The second is the so-called 'primary' clipboard
+	// which is implicitly copied upon selection on platforms which expect this
+	// (i.e. X11/Linux, Mac).
+	bool copyToClipboard(const LLWString& src, S32 pos, S32 len, bool use_primary = false);
+	bool addToClipboard(const LLWString& src, S32 pos, S32 len, bool use_primary = false);
+	bool pasteFromClipboard(LLWString& dst, bool use_primary = false);
+	bool isTextAvailable(bool use_primary = false) const;
+	
+	// Object list management:
+	// -----------------------
+	// Clears and adds one single object to the clipboard
+	bool copyToClipboard(const LLUUID& src, const LLAssetType::EType type = LLAssetType::AT_NONE);
+	// Adds one object to the current list of objects on the clipboard
+	bool addToClipboard(const LLUUID& src, const LLAssetType::EType type = LLAssetType::AT_NONE);
+	// Gets a copy of the objects on the clipboard
+	bool pasteFromClipboard(std::vector<LLUUID>& inventory_objects) const;
+	
+	bool hasContents() const;										// True if the clipboard has pasteable objects
+	bool isOnClipboard(const LLUUID& object) const;					// True if the input object uuid is on the clipboard
 
-	void		copyFromPrimarySubstring(const LLWString &copy_from, S32 pos, S32 len, const LLUUID& source_id = LLUUID::null );
-	BOOL		canPastePrimaryString() const;
-	const LLWString&	getPastePrimaryWString(LLUUID* source_id = NULL);	
+	bool isCutMode() const { return mCutMode; }
+	void setCutMode(bool mode) { mCutMode = mode; mGeneration++; }
 
-	// Support clipboard for object known only by their uuid and asset type
-	void		  setSourceObject(const LLUUID& source_id, LLAssetType::EType type);
-	const LLInventoryObject* getSourceObject() { return mSourceItem; }
-	
 private:
-	LLUUID      mSourceID;
-	LLWString	mString;
-	LLInventoryObject* mSourceItem;
+	std::vector<LLUUID> mObjects;		// Objects on the clipboard. Can be empty while mString contains something licit (e.g. text from chat)
+	LLWString mString;					// The text string. If mObjects is not empty, this string is reflecting them (UUIDs for the moment) if the asset type is knowable.
+	bool mCutMode;						// This is a convenience flag for the viewer.
+	int mGeneration;					// Incremented when the clipboard changes so that interested parties can check for changes on the clipboard.	
 };
 
-
-// Global singleton
-extern LLClipboard gClipboard;
-
-
 #endif  // LL_LLCLIPBOARD_H
diff --git a/indra/llui/llcombobox.cpp b/indra/llui/llcombobox.cpp
index 89d8842393..806d2ef3f6 100644
--- a/indra/llui/llcombobox.cpp
+++ b/indra/llui/llcombobox.cpp
@@ -613,7 +613,7 @@ void LLComboBox::showList()
 	}
 	mList->setOrigin(rect.mLeft, rect.mBottom);
 	mList->reshape(rect.getWidth(), rect.getHeight());
-	mList->translateIntoRect(root_view_local, FALSE);
+	mList->translateIntoRect(root_view_local);
 
 	// Make sure we didn't go off bottom of screen
 	S32 x, y;
diff --git a/indra/llui/lldraghandle.cpp b/indra/llui/lldraghandle.cpp
index 42e6c3c786..5f69c6af31 100644
--- a/indra/llui/lldraghandle.cpp
+++ b/indra/llui/lldraghandle.cpp
@@ -244,7 +244,7 @@ void LLDragHandleTop::reshapeTitleBox()
 	const LLFontGL* font = LLFontGL::getFontSansSerif();
 	S32 title_width = getRect().getWidth();
 	title_width -= LEFT_PAD + 2 * BORDER_PAD + getButtonsRect().getWidth();
-	S32 title_height = llround(font->getLineHeight());
+	S32 title_height = font->getLineHeight();
 	LLRect title_rect;
 	title_rect.setLeftTopAndSize( 
 		LEFT_PAD, 
diff --git a/indra/llui/llfloater.cpp b/indra/llui/llfloater.cpp
index 33548151fd..a8a3a1f906 100644
--- a/indra/llui/llfloater.cpp
+++ b/indra/llui/llfloater.cpp
@@ -68,10 +68,10 @@ namespace LLInitParam
 {
 	void TypeValues<LLFloaterEnums::EOpenPositioning>::declareValues()
 	{
-		declare("none",       LLFloaterEnums::OPEN_POSITIONING_NONE);
-		declare("cascading",  LLFloaterEnums::OPEN_POSITIONING_CASCADING);
-		declare("centered",   LLFloaterEnums::OPEN_POSITIONING_CENTERED);
-		declare("specified",  LLFloaterEnums::OPEN_POSITIONING_SPECIFIED);
+		declare("relative",   LLFloaterEnums::POSITIONING_RELATIVE);
+		declare("cascading",  LLFloaterEnums::POSITIONING_CASCADING);
+		declare("centered",   LLFloaterEnums::POSITIONING_CENTERED);
+		declare("specified",  LLFloaterEnums::POSITIONING_SPECIFIED);
 	}
 }
 
@@ -177,9 +177,7 @@ LLFloater::Params::Params()
 	save_visibility("save_visibility", false),
 	can_dock("can_dock", false),
 	show_title("show_title", true),
-	open_positioning("open_positioning", LLFloaterEnums::OPEN_POSITIONING_NONE),
-	specified_left("specified_left"),
-	specified_bottom("specified_bottom"),
+	positioning("positioning", LLFloaterEnums::POSITIONING_RELATIVE),
 	header_height("header_height", 0),
 	legacy_header_height("legacy_header_height", 0),
 	close_image("close_image"),
@@ -249,9 +247,7 @@ LLFloater::LLFloater(const LLSD& key, const LLFloater::Params& p)
 	mCanClose(p.can_close),
 	mDragOnLeft(p.can_drag_on_left),
 	mResizable(p.can_resize),
-	mOpenPositioning(p.open_positioning),
-	mSpecifiedLeft(p.specified_left),
-	mSpecifiedBottom(p.specified_bottom),
+	mPositioning(p.positioning),
 	mMinWidth(p.min_width),
 	mMinHeight(p.min_height),
 	mHeaderHeight(p.header_height),
@@ -270,6 +266,7 @@ LLFloater::LLFloater(const LLSD& key, const LLFloater::Params& p)
 	mMinimizeSignal(NULL)
 //	mNotificationContext(NULL)
 {
+	mPosition.setFloater(*this);
 //	mNotificationContext = new LLFloaterNotificationContext(getHandle());
 
 	// Clicks stop here.
@@ -546,10 +543,18 @@ LLFloater::~LLFloater()
 
 void LLFloater::storeRectControl()
 {
-	if( mRectControl.size() > 1 )
+	if (!mRectControl.empty())
 	{
 		getControlGroup()->setRect( mRectControl, getRect() );
 	}
+	if (!mPosXControl.empty() && mPositioning == LLFloaterEnums::POSITIONING_RELATIVE)
+	{
+		getControlGroup()->setF32( mPosXControl, mPosition.mX );
+	}
+	if (!mPosYControl.empty() && mPositioning == LLFloaterEnums::POSITIONING_RELATIVE)
+	{
+		getControlGroup()->setF32( mPosYControl, mPosition.mY );
+	}
 }
 
 void LLFloater::storeVisibilityControl()
@@ -568,23 +573,6 @@ void LLFloater::storeDockStateControl()
 	}
 }
 
-LLRect LLFloater::getSavedRect() const
-{
-	LLRect rect;
-
-	if (mRectControl.size() > 1)
-	{
-		rect = getControlGroup()->getRect(mRectControl);
-	}
-
-	return rect;
-}
-
-bool LLFloater::hasSavedRect() const
-{
-	return !getSavedRect().isEmpty();
-}
-
 // static
 std::string LLFloater::getControlName(const std::string& name, const LLSD& key)
 {
@@ -862,7 +850,7 @@ void LLFloater::applyControlsAndPosition(LLFloater* other)
 	{
 		if (!applyRectControl())
 		{
-			applyPositioning(other);
+			applyPositioning(other, true);
 		}
 	}
 }
@@ -871,29 +859,68 @@ bool LLFloater::applyRectControl()
 {
 	bool saved_rect = false;
 
+	LLRect screen_rect = calcScreenRect();
+	mPosition = LLCoordGL(screen_rect.getCenterX(), screen_rect.getCenterY()).convert();
+	
 	LLFloater* last_in_group = LLFloaterReg::getLastFloaterInGroup(mInstanceName);
 	if (last_in_group && last_in_group != this)
 	{
 		// other floaters in our group, position ourselves relative to them and don't save the rect
 		mRectControl.clear();
-		mOpenPositioning = LLFloaterEnums::OPEN_POSITIONING_CASCADE_GROUP;
+		mPositioning = LLFloaterEnums::POSITIONING_CASCADE_GROUP;
 	}
-	else if (mRectControl.size() > 1)
+	else
 	{
-		// If we have a saved rect, use it
-		const LLRect& rect = getControlGroup()->getRect(mRectControl);
-		saved_rect = rect.notEmpty();
-		if (saved_rect)
+		bool rect_specified = false;
+		if (!mRectControl.empty())
 		{
-			setOrigin(rect.mLeft, rect.mBottom);
-
-			if (mResizable)
+			// If we have a saved rect, use it
+			const LLRect& rect = getControlGroup()->getRect(mRectControl);
+			if (rect.notEmpty()) saved_rect = true;
+			if (saved_rect)
 			{
-				reshape(llmax(mMinWidth, rect.getWidth()), llmax(mMinHeight, rect.getHeight()));
+				setOrigin(rect.mLeft, rect.mBottom);
+
+				if (mResizable)
+				{
+					reshape(llmax(mMinWidth, rect.getWidth()), llmax(mMinHeight, rect.getHeight()));
+				}
+				mPositioning = LLFloaterEnums::POSITIONING_RELATIVE;
+				LLRect screen_rect = calcScreenRect();
+				mPosition = LLCoordGL(screen_rect.getCenterX(), screen_rect.getCenterY()).convert();
+				rect_specified = true;
 			}
 		}
+
+		LLControlVariablePtr x_control = getControlGroup()->getControl(mPosXControl);
+		LLControlVariablePtr y_control = getControlGroup()->getControl(mPosYControl);
+		if (x_control.notNull() 
+			&& y_control.notNull()
+			&& !x_control->isDefault()
+			&& !y_control->isDefault())
+		{
+			mPosition.mX = x_control->getValue().asReal();
+			mPosition.mY = y_control->getValue().asReal();
+			mPositioning = LLFloaterEnums::POSITIONING_RELATIVE;
+			applyRelativePosition();
+
+			saved_rect = true;
+		}
+
+		// remember updated position
+		if (rect_specified)
+		{
+			storeRectControl();
+		}
 	}
 
+	if (saved_rect)
+	{
+		// propagate any derived positioning data back to settings file
+		storeRectControl();
+	}
+
+
 	return saved_rect;
 }
 
@@ -910,50 +937,56 @@ bool LLFloater::applyDockState()
 	return docked;
 }
 
-void LLFloater::applyPositioning(LLFloater* other)
+void LLFloater::applyPositioning(LLFloater* other, bool on_open)
 {
 	// Otherwise position according to the positioning code
-	switch (mOpenPositioning)
+	switch (mPositioning)
 	{
-	case LLFloaterEnums::OPEN_POSITIONING_CENTERED:
+	case LLFloaterEnums::POSITIONING_CENTERED:
 		center();
 		break;
 
-	case LLFloaterEnums::OPEN_POSITIONING_SPECIFIED:
-		{
-			// Translate relative to snap rect
-			setOrigin(mSpecifiedLeft, mSpecifiedBottom);
-			const LLRect& snap_rect = gFloaterView->getSnapRect();
-			translate(snap_rect.mLeft, snap_rect.mBottom);
-			translateIntoRect(snap_rect, FALSE);
-		}
+	case LLFloaterEnums::POSITIONING_SPECIFIED:
 		break;
 
-	case LLFloaterEnums::OPEN_POSITIONING_CASCADE_GROUP:
-	case LLFloaterEnums::OPEN_POSITIONING_CASCADING:
-		if (other != NULL && other != this)
+	case LLFloaterEnums::POSITIONING_CASCADING:
+		if (!on_open)
 		{
-			stackWith(*other);
+			applyRelativePosition();
 		}
-		else
+		// fall through
+	case LLFloaterEnums::POSITIONING_CASCADE_GROUP:
+		if (on_open)
 		{
-			static const U32 CASCADING_FLOATER_HOFFSET = 0;
-			static const U32 CASCADING_FLOATER_VOFFSET = 0;
+			if (other != NULL && other != this)
+			{
+				stackWith(*other);
+			}
+			else
+			{
+				static const U32 CASCADING_FLOATER_HOFFSET = 0;
+				static const U32 CASCADING_FLOATER_VOFFSET = 0;
 			
-			const LLRect& snap_rect = gFloaterView->getSnapRect();
+				const LLRect& snap_rect = gFloaterView->getSnapRect();
 
-			const S32 horizontal_offset = CASCADING_FLOATER_HOFFSET;
-			const S32 vertical_offset = snap_rect.getHeight() - CASCADING_FLOATER_VOFFSET;
+				const S32 horizontal_offset = CASCADING_FLOATER_HOFFSET;
+				const S32 vertical_offset = snap_rect.getHeight() - CASCADING_FLOATER_VOFFSET;
 
-			S32 rect_height = getRect().getHeight();
-			setOrigin(horizontal_offset, vertical_offset - rect_height);
+				S32 rect_height = getRect().getHeight();
+				setOrigin(horizontal_offset, vertical_offset - rect_height);
 
-			translate(snap_rect.mLeft, snap_rect.mBottom);
-			translateIntoRect(snap_rect, FALSE);
+				translate(snap_rect.mLeft, snap_rect.mBottom);
+			}
+			setFollows(FOLLOWS_TOP | FOLLOWS_LEFT);
 		}
 		break;
 
-	case LLFloaterEnums::OPEN_POSITIONING_NONE:
+	case LLFloaterEnums::POSITIONING_RELATIVE:
+		{
+			applyRelativePosition();
+
+			break;
+		}
 	default:
 		// Do nothing
 		break;
@@ -1071,7 +1104,9 @@ void LLFloater::handleReshape(const LLRect& new_rect, bool by_user)
 	if (by_user && !isMinimized())
 	{
 		storeRectControl();
-		mOpenPositioning = LLFloaterEnums::OPEN_POSITIONING_NONE;
+		mPositioning = LLFloaterEnums::POSITIONING_RELATIVE;
+		LLRect screen_rect = calcScreenRect();
+		mPosition = LLCoordGL(screen_rect.getCenterX(), screen_rect.getCenterY()).convert();
 	}
 
 	// if not minimized, adjust all snapped dependents to new shape
@@ -1249,6 +1284,7 @@ void LLFloater::setMinimized(BOOL minimize)
 
 		// Reshape *after* setting mMinimized
 		reshape( mExpandedRect.getWidth(), mExpandedRect.getHeight(), TRUE );
+		applyPositioning(NULL, false);
 	}
 
 	make_ui_sound("UISndWindowClose");
@@ -1589,7 +1625,7 @@ void LLFloater::setDocked(bool docked, bool pop_on_undock)
 		if (mDocked)
 		{
 			setMinimized(FALSE);
-			mOpenPositioning = LLFloaterEnums::OPEN_POSITIONING_NONE;
+			mPositioning = LLFloaterEnums::POSITIONING_RELATIVE;
 		}
 
 		updateTitleButtons();
@@ -1623,7 +1659,7 @@ void LLFloater::onClickTearOff(LLFloater* self)
 		self->openFloater(self->getKey());
 		
 		// only force position for floaters that don't have that data saved
-		if (self->mRectControl.size() <= 1)
+		if (self->mRectControl.empty())
 		{
 			new_rect.setLeftTopAndSize(host_floater->getRect().mLeft + 5, host_floater->getRect().mTop - floater_header_size - 5, self->getRect().getWidth(), self->getRect().getHeight());
 			self->setRect(new_rect);
@@ -1681,6 +1717,8 @@ LLFloater* LLFloater::getClosableFloaterFromFocus()
 	{
 		if (it->hasFocus())
 		{
+			LLFloater& floater = *it;
+			focused_floater = &floater;
 			break;
 		}
 	}
@@ -1800,7 +1838,7 @@ void LLFloater::draw()
 				
 				const LLFontGL* font = LLFontGL::getFontSansSerif();
 				LLRect r = getRect();
-				gl_rect_2d_offset_local(0, r.getHeight(), r.getWidth(), r.getHeight() - (S32)font->getLineHeight() - 1, 
+				gl_rect_2d_offset_local(0, r.getHeight(), r.getWidth(), r.getHeight() - font->getLineHeight() - 1, 
 					titlebar_focus_color % alpha, 0, TRUE);
 			}
 		}
@@ -2161,19 +2199,14 @@ LLFloaterView::LLFloaterView (const Params& p)
 	mSnapOffsetBottom(0),
 	mSnapOffsetRight(0)
 {
+	mSnapView = getHandle();
 }
 
 // By default, adjust vertical.
 void LLFloaterView::reshape(S32 width, S32 height, BOOL called_from_parent)
 {
-	S32 old_right = mLastSnapRect.mRight;
-	S32 old_top = mLastSnapRect.mTop;
-
 	LLView::reshape(width, height, called_from_parent);
 
-	S32 new_right = getSnapRect().mRight;
-	S32 new_top = getSnapRect().mTop;
-
 	mLastSnapRect = getSnapRect();
 
 	for ( child_list_const_iter_t child_it = getChildList()->begin(); child_it != getChildList()->end(); ++child_it)
@@ -2186,35 +2219,39 @@ void LLFloaterView::reshape(S32 width, S32 height, BOOL called_from_parent)
 			continue;
 		}
 
-		if (!floaterp->isMinimized())
+		if (!floaterp->isMinimized() && floaterp->getCanDrag())
 		{
-			LLRect r = floaterp->getRect();
+			LLRect old_rect = floaterp->getRect();
+			floaterp->applyPositioning(NULL, false);
+			LLRect new_rect = floaterp->getRect();
 
-			// Compute absolute distance from each edge of screen
-			S32 left_offset = llabs(r.mLeft - 0);
-			S32 right_offset = llabs(old_right - r.mRight);
+			//LLRect r = floaterp->getRect();
 
-			S32 top_offset = llabs(old_top - r.mTop);
-			S32 bottom_offset = llabs(r.mBottom - 0);
+			//// Compute absolute distance from each edge of screen
+			//S32 left_offset = llabs(r.mLeft - 0);
+			//S32 right_offset = llabs(old_right - r.mRight);
 
-			S32 translate_x = 0;
-			S32 translate_y = 0;
+			//S32 top_offset = llabs(old_top - r.mTop);
+			//S32 bottom_offset = llabs(r.mBottom - 0);
 
-			if (left_offset > right_offset)
-			{
-				translate_x = new_right - old_right;
-			}
+			S32 translate_x = new_rect.mLeft - old_rect.mLeft;
+			S32 translate_y = new_rect.mBottom - old_rect.mBottom;
 
-			if (top_offset < bottom_offset)
-			{
-				translate_y = new_top - old_top;
-			}
+			//if (left_offset > right_offset)
+			//{
+			//	translate_x = new_right - old_right;
+			//}
+
+			//if (top_offset < bottom_offset)
+			//{
+			//	translate_y = new_top - old_top;
+			//}
 
 			// don't reposition immovable floaters
-			if (floaterp->getCanDrag())
-			{
-				floaterp->translate(translate_x, translate_y);
-			}
+			//if (floaterp->getCanDrag())
+			//{
+			//	floaterp->translate(translate_x, translate_y);
+			//}
 			BOOST_FOREACH(LLHandle<LLFloater> dependent_floater, floaterp->mDependents)
 			{
 				if (dependent_floater.get())
@@ -2641,6 +2678,8 @@ void LLFloaterView::refresh()
 	}
 }
 
+const S32 FLOATER_MIN_VISIBLE_PIXELS = 16;
+
 void LLFloaterView::adjustToFitScreen(LLFloater* floater, BOOL allow_partial_outside)
 {
 	if (floater->getParent() != this)
@@ -2694,7 +2733,7 @@ void LLFloaterView::adjustToFitScreen(LLFloater* floater, BOOL allow_partial_out
 	}
 
 	// move window fully onscreen
-	if (floater->translateIntoRect( getSnapRect(), allow_partial_outside ))
+	if (floater->translateIntoRect( getSnapRect(), allow_partial_outside ? FLOATER_MIN_VISIBLE_PIXELS : S32_MAX ))
 	{
 		floater->clearSnapTarget();
 	}
@@ -2908,9 +2947,11 @@ void LLFloater::setInstanceName(const std::string& name)
 		std::string ctrl_name = getControlName(mInstanceName, mKey);
 
 		// save_rect and save_visibility only apply to registered floaters
-		if (!mRectControl.empty())
+		if (mSaveRect)
 		{
 			mRectControl = LLFloaterReg::declareRectControl(ctrl_name);
+			mPosXControl = LLFloaterReg::declarePosXControl(ctrl_name);
+			mPosYControl = LLFloaterReg::declarePosYControl(ctrl_name);
 		}
 		if (!mVisibilityControl.empty())
 		{
@@ -2967,7 +3008,10 @@ void LLFloater::initFromParams(const LLFloater::Params& p)
 	LLPanel::initFromParams(p);
 
 	// override any follows flags
-	setFollows(FOLLOWS_NONE);
+	if (mPositioning != LLFloaterEnums::POSITIONING_SPECIFIED)
+	{
+		setFollows(FOLLOWS_NONE);
+	}
 
 	mTitle = p.title;
 	mShortTitle = p.short_title;
@@ -2986,14 +3030,9 @@ void LLFloater::initFromParams(const LLFloater::Params& p)
 	mSingleInstance = p.single_instance;
 	mReuseInstance = p.reuse_instance.isProvided() ? p.reuse_instance : p.single_instance;
 
-	mOpenPositioning = p.open_positioning;
-	mSpecifiedLeft = p.specified_left;
-	mSpecifiedBottom = p.specified_bottom;
+	mPositioning = p.positioning;
 
-	if (p.save_rect && mRectControl.empty())
-	{
-		mRectControl = "t"; // flag to build mRectControl name once mInstanceName is set
-	}
+	mSaveRect = p.save_rect;
 	if (p.save_visibility)
 	{
 		mVisibilityControl = "t"; // flag to build mVisibilityControl name once mInstanceName is set
@@ -3108,7 +3147,7 @@ bool LLFloater::initFloaterXML(LLXMLNodePtr node, LLView *parent, const std::str
 		params.rect.left.set(0);
 	}
 	params.from_xui = true;
-	applyXUILayout(params, parent);
+	applyXUILayout(params, parent, parent == gFloaterView ? gFloaterView->getSnapRect() : parent->getLocalRect());
  	initFromParams(params);
 
 	initFloater(params);
@@ -3267,5 +3306,137 @@ void LLFloater::stackWith(LLFloater& other)
 	next_rect.setLeftTopAndSize(next_rect.mLeft, next_rect.mTop, getRect().getWidth(), getRect().getHeight());
 	
 	setShape(next_rect);
+
+	other.mPositioning = LLFloaterEnums::POSITIONING_CASCADE_GROUP;
+	other.setFollows(FOLLOWS_LEFT | FOLLOWS_TOP);
+}
+
+void LLFloater::applyRelativePosition()
+{
+	LLRect snap_rect = gFloaterView->getSnapRect();
+	LLRect floater_view_screen_rect = gFloaterView->calcScreenRect();
+	snap_rect.translate(floater_view_screen_rect.mLeft, floater_view_screen_rect.mBottom);
+	LLRect floater_screen_rect = calcScreenRect();
+
+	LLCoordGL new_center = mPosition.convert();
+	LLCoordGL cur_center(floater_screen_rect.getCenterX(), floater_screen_rect.getCenterY());
+	translate(new_center.mX - cur_center.mX, new_center.mY - cur_center.mY);
+}
+
+
+LLCoordFloater::LLCoordFloater(F32 x, F32 y, LLFloater& floater)
+:	coord_t((S32)x, (S32)y)
+{
+	mFloater = floater.getHandle();
+}
+
+
+LLCoordFloater::LLCoordFloater(const LLCoordCommon& other, LLFloater& floater)
+{
+	mFloater = floater.getHandle();
+	convertFromCommon(other);
+}
+
+LLCoordFloater& LLCoordFloater::operator=(const LLCoordFloater& other)
+{
+	mFloater = other.mFloater;
+	coord_t::operator =(other);
+	return *this;
+}
+
+void LLCoordFloater::setFloater(LLFloater& floater)
+{
+	mFloater = floater.getHandle();
+}
+
+bool LLCoordFloater::operator==(const LLCoordFloater& other) const 
+{ 
+	return mX == other.mX && mY == other.mY && mFloater == other.mFloater; 
 }
 
+LLCoordCommon LL_COORD_FLOATER::convertToCommon() const
+{
+	const LLCoordFloater& self = static_cast<const LLCoordFloater&>(LLCoordFloater::getTypedCoords(*this));
+
+	LLRect snap_rect = gFloaterView->getSnapRect();
+	LLRect floater_view_screen_rect = gFloaterView->calcScreenRect();
+	snap_rect.translate(floater_view_screen_rect.mLeft, floater_view_screen_rect.mBottom);
+
+	LLFloater* floaterp = mFloater.get();
+	S32 floater_width = floaterp ? floaterp->getRect().getWidth() : 0;
+	S32 floater_height = floaterp ? floaterp->getRect().getHeight() : 0;
+	LLCoordCommon out;
+	if (self.mX < -0.5f)
+	{
+		out.mX = llround(rescale(self.mX, -1.f, -0.5f, snap_rect.mLeft - (floater_width - FLOATER_MIN_VISIBLE_PIXELS), snap_rect.mLeft));
+	}
+	else if (self.mX > 0.5f)
+	{
+		out.mX = llround(rescale(self.mX, 0.5f, 1.f, snap_rect.mRight - floater_width, snap_rect.mRight - FLOATER_MIN_VISIBLE_PIXELS));
+	}
+	else
+	{
+		out.mX = llround(rescale(self.mX, -0.5f, 0.5f, snap_rect.mLeft, snap_rect.mRight - floater_width));
+	}
+
+	if (self.mY < -0.5f)
+	{
+		out.mY = llround(rescale(self.mY, -1.f, -0.5f, snap_rect.mBottom - (floater_height - FLOATER_MIN_VISIBLE_PIXELS), snap_rect.mBottom));
+	}
+	else if (self.mY > 0.5f)
+	{
+		out.mY = llround(rescale(self.mY, 0.5f, 1.f, snap_rect.mTop - floater_height, snap_rect.mTop - FLOATER_MIN_VISIBLE_PIXELS));
+	}
+	else
+	{
+		out.mY = llround(rescale(self.mY, -0.5f, 0.5f, snap_rect.mBottom, snap_rect.mTop - floater_height));
+	}
+
+	// return center point instead of lower left
+	out.mX += floater_width / 2;
+	out.mY += floater_height / 2;
+
+	return out;
+}
+
+void LL_COORD_FLOATER::convertFromCommon(const LLCoordCommon& from)
+{
+	LLCoordFloater& self = static_cast<LLCoordFloater&>(LLCoordFloater::getTypedCoords(*this));
+	LLRect snap_rect = gFloaterView->getSnapRect();
+	LLRect floater_view_screen_rect = gFloaterView->calcScreenRect();
+	snap_rect.translate(floater_view_screen_rect.mLeft, floater_view_screen_rect.mBottom);
+
+
+	LLFloater* floaterp = mFloater.get();
+	S32 floater_width = floaterp ? floaterp->getRect().getWidth() : 0;
+	S32 floater_height = floaterp ? floaterp->getRect().getHeight() : 0;
+
+	S32 from_x = from.mX - floater_width / 2;
+	S32 from_y = from.mY - floater_height / 2;
+
+	if (from_x < snap_rect.mLeft)
+	{
+		self.mX = rescale(from_x, snap_rect.mLeft - (floater_width - FLOATER_MIN_VISIBLE_PIXELS), snap_rect.mLeft, -1.f, -0.5f);
+	}
+	else if (from_x + floater_width > snap_rect.mRight)
+	{
+		self.mX = rescale(from_x, snap_rect.mRight - floater_width, snap_rect.mRight - FLOATER_MIN_VISIBLE_PIXELS, 0.5f, 1.f);
+	}
+	else
+	{
+		self.mX = rescale(from_x, snap_rect.mLeft, snap_rect.mRight - floater_width, -0.5f, 0.5f);
+	}
+
+	if (from_y < snap_rect.mBottom)
+	{
+		self.mY = rescale(from_y, snap_rect.mBottom - (floater_height - FLOATER_MIN_VISIBLE_PIXELS), snap_rect.mBottom, -1.f, -0.5f);
+	}
+	else if (from_y + floater_height > snap_rect.mTop)
+	{
+		self.mY = rescale(from_y, snap_rect.mTop - floater_height, snap_rect.mTop - FLOATER_MIN_VISIBLE_PIXELS, 0.5f, 1.f);
+	}
+	else
+	{
+		self.mY = rescale(from_y, snap_rect.mBottom, snap_rect.mTop - floater_height, -0.5f, 0.5f);
+	}
+}
diff --git a/indra/llui/llfloater.h b/indra/llui/llfloater.h
index 59b35d206f..64d6dcea04 100644
--- a/indra/llui/llfloater.h
+++ b/indra/llui/llfloater.h
@@ -64,12 +64,12 @@ namespace LLFloaterEnums
 {
 	enum EOpenPositioning
 	{
-		OPEN_POSITIONING_NONE,
-		OPEN_POSITIONING_CASCADING,
-		OPEN_POSITIONING_CASCADE_GROUP,
-		OPEN_POSITIONING_CENTERED,
-		OPEN_POSITIONING_SPECIFIED,
-		OPEN_POSITIONING_COUNT
+		POSITIONING_RELATIVE,
+		POSITIONING_CASCADING,
+		POSITIONING_CASCADE_GROUP,
+		POSITIONING_CENTERED,
+		POSITIONING_SPECIFIED,
+		POSITIONING_COUNT
 	};
 }
 
@@ -82,6 +82,37 @@ namespace LLInitParam
 	};
 }
 
+struct LL_COORD_FLOATER
+{
+	typedef F32 value_t;
+
+	LLCoordCommon convertToCommon() const;
+	void convertFromCommon(const LLCoordCommon& from);
+protected:
+	LLHandle<LLFloater> mFloater;
+};
+
+struct LLCoordFloater : LLCoord<LL_COORD_FLOATER>
+{
+	typedef LLCoord<LL_COORD_FLOATER> coord_t;
+
+	LLCoordFloater() {}
+	LLCoordFloater(F32 x, F32 y, LLFloater& floater);
+	LLCoordFloater(const LLCoordCommon& other, LLFloater& floater);
+
+	LLCoordFloater& operator=(const LLCoordCommon& other)
+	{
+		convertFromCommon(other);
+		return *this;
+	}
+
+	LLCoordFloater& operator=(const LLCoordFloater& other);
+
+	bool operator==(const LLCoordFloater& other) const;
+	bool operator!=(const LLCoordFloater& other) const { return !(*this == other); }
+
+	void setFloater(LLFloater& floater);
+};
 
 class LLFloater : public LLPanel, public LLInstanceTracker<LLFloater>
 {
@@ -132,10 +163,7 @@ public:
 								can_dock,
 								show_title;
 		
-		Optional<LLFloaterEnums::EOpenPositioning>	open_positioning;
-		Optional<S32>								specified_left;
-		Optional<S32>								specified_bottom;
-
+		Optional<LLFloaterEnums::EOpenPositioning>	positioning;
 		
 		Optional<S32>			header_height,
 								legacy_header_height; // HACK see initFromXML()
@@ -184,7 +212,7 @@ public:
 	bool initFloaterXML(LLXMLNodePtr node, LLView *parent, const std::string& filename, LLXMLNodePtr output_node = NULL);
 
 	/*virtual*/ void handleReshape(const LLRect& new_rect, bool by_user = false);
-	/*virtual*/ BOOL canSnapTo(const LLView* other_view);
+	/*virtual*/ BOOL canSnapTo(const LLView* other_view); 
 	/*virtual*/ void setSnappedTo(const LLView* snap_view);
 	/*virtual*/ void setFocus( BOOL b );
 	/*virtual*/ void setIsChrome(BOOL is_chrome);
@@ -241,8 +269,6 @@ public:
 	BOOL			isResizable() const				{ return mResizable; }
 	void			setResizeLimits( S32 min_width, S32 min_height );
 	void			getResizeLimits( S32* min_width, S32* min_height ) { *min_width = mMinWidth; *min_height = mMinHeight; }
-	LLRect			getSavedRect() const;
-	bool			hasSavedRect() const;
 
 	static std::string		getControlName(const std::string& name, const LLSD& key);
 	static LLControlGroup*	getControlGroup();
@@ -324,7 +350,7 @@ public:
 		
 	void			enableResizeCtrls(bool enable, bool width = true, bool height = true);
 
-	bool			isPositioning(LLFloaterEnums::EOpenPositioning p) const { return (p == mOpenPositioning); }
+	bool			isPositioning(LLFloaterEnums::EOpenPositioning p) const { return (p == mPositioning); }
 protected:
 	void			applyControlsAndPosition(LLFloater* other);
 
@@ -332,7 +358,9 @@ protected:
 
 	virtual bool	applyRectControl();
 	bool			applyDockState();
-	void			applyPositioning(LLFloater* other);
+	void			applyPositioning(LLFloater* other, bool on_open);
+	void			applyRelativePosition();
+
 	void			storeRectControl();
 	void			storeVisibilityControl();
 	void			storeDockStateControl();
@@ -396,7 +424,10 @@ public:
 	commit_signal_t* mMinimizeSignal;
 
 protected:
+	bool			mSaveRect;
 	std::string		mRectControl;
+	std::string		mPosXControl;
+	std::string		mPosYControl;
 	std::string		mVisibilityControl;
 	std::string		mDocStateControl;
 	LLSD			mKey;				// Key used for retrieving instances; set (for now) by LLFLoaterReg
@@ -422,9 +453,8 @@ private:
 	BOOL			mDragOnLeft;
 	BOOL			mResizable;
 
-	LLFloaterEnums::EOpenPositioning	mOpenPositioning;
-	S32									mSpecifiedLeft;
-	S32									mSpecifiedBottom;
+	LLFloaterEnums::EOpenPositioning	mPositioning;
+	LLCoordFloater	mPosition;
 	
 	S32				mMinWidth;
 	S32				mMinHeight;
diff --git a/indra/llui/llfloaterreg.cpp b/indra/llui/llfloaterreg.cpp
index e144b68f5e..9115eb7174 100644
--- a/indra/llui/llfloaterreg.cpp
+++ b/indra/llui/llfloaterreg.cpp
@@ -96,7 +96,9 @@ LLFloater* LLFloaterReg::getLastFloaterCascading()
 		{
 			LLFloater* inst = *iter;
 
-			if (inst->getVisible() && inst->isPositioning(LLFloaterEnums::OPEN_POSITIONING_CASCADING))
+			if (inst->getVisible() 
+				&& (inst->isPositioning(LLFloaterEnums::POSITIONING_CASCADING)
+					|| inst->isPositioning(LLFloaterEnums::POSITIONING_CASCADE_GROUP)))
 			{
 				if (candidate_rect.mTop > inst->getRect().mTop)
 				{
@@ -358,9 +360,7 @@ void LLFloaterReg::restoreVisibleInstances()
 //static
 std::string LLFloaterReg::getRectControlName(const std::string& name)
 {
-	std::string res = std::string("floater_rect_") + name;
-	LLStringUtil::replaceChar( res, ' ', '_' );
-	return res;
+	return std::string("floater_rect_") + getBaseControlName(name);
 }
 
 //static
@@ -368,19 +368,48 @@ std::string LLFloaterReg::declareRectControl(const std::string& name)
 {
 	std::string controlname = getRectControlName(name);
 	LLFloater::getControlGroup()->declareRect(controlname, LLRect(),
-												 llformat("Window Position and Size for %s", name.c_str()),
+												 llformat("Window Size for %s", name.c_str()),
 												 TRUE);
 	return controlname;
 }
 
+std::string LLFloaterReg::declarePosXControl(const std::string& name)
+{
+	std::string controlname = std::string("floater_pos_") + getBaseControlName(name) + "_x";
+	LLFloater::getControlGroup()->declareF32(controlname, 
+											10.f,
+											llformat("Window X Position for %s", name.c_str()),
+											TRUE);
+	return controlname;
+}
+
+std::string LLFloaterReg::declarePosYControl(const std::string& name)
+{
+	std::string controlname = std::string("floater_pos_") + getBaseControlName(name) + "_y";
+	LLFloater::getControlGroup()->declareF32(controlname,
+											10.f,
+											llformat("Window Y Position for %s", name.c_str()),
+											TRUE);
+
+	return controlname;
+}
+
+
 //static
 std::string LLFloaterReg::getVisibilityControlName(const std::string& name)
 {
-	std::string res = std::string("floater_vis_") + name;
+	return std::string("floater_vis_") + getBaseControlName(name);
+}
+
+//static 
+std::string LLFloaterReg::getBaseControlName(const std::string& name)
+{
+	std::string res(name);
 	LLStringUtil::replaceChar( res, ' ', '_' );
 	return res;
 }
 
+
 //static
 std::string LLFloaterReg::declareVisibilityControl(const std::string& name)
 {
diff --git a/indra/llui/llfloaterreg.h b/indra/llui/llfloaterreg.h
index 534cf8b40a..a1e1f8a988 100644
--- a/indra/llui/llfloaterreg.h
+++ b/indra/llui/llfloaterreg.h
@@ -115,9 +115,11 @@ public:
 	// Control Variables
 	static std::string getRectControlName(const std::string& name);
 	static std::string declareRectControl(const std::string& name);
+	static std::string declarePosXControl(const std::string& name);
+	static std::string declarePosYControl(const std::string& name);
 	static std::string getVisibilityControlName(const std::string& name);
 	static std::string declareVisibilityControl(const std::string& name);
-
+	static std::string getBaseControlName(const std::string& name);
 	static std::string declareDockStateControl(const std::string& name);
 	static std::string getDockStateControlName(const std::string& name);
 
diff --git a/indra/llui/lllayoutstack.cpp b/indra/llui/lllayoutstack.cpp
index 2f1c2a47c9..4c730286da 100644
--- a/indra/llui/lllayoutstack.cpp
+++ b/indra/llui/lllayoutstack.cpp
@@ -36,7 +36,7 @@
 #include "llcriticaldamp.h"
 #include "boost/foreach.hpp"
 
-static const F32 MIN_FRACTIONAL_SIZE = 0.0001f;
+static const F32 MIN_FRACTIONAL_SIZE = 0.0f;
 static const F32 MAX_FRACTIONAL_SIZE = 1.f;
 
 static LLDefaultChildRegistry::Register<LLLayoutStack> register_layout_stack("layout_stack");
@@ -113,7 +113,26 @@ S32 LLLayoutPanel::getLayoutDim() const
 					? getRect().getWidth()
 					: getRect().getHeight()));
 }
- 
+
+S32 LLLayoutPanel::getTargetDim() const
+{
+	return mTargetDim;
+}
+
+void LLLayoutPanel::setTargetDim(S32 value)
+{
+	LLRect new_rect(getRect());
+	if (mOrientation == LLLayoutStack::HORIZONTAL)
+	{
+		new_rect.mRight = new_rect.mLeft + value;
+	}
+	else
+	{
+		new_rect.mTop = new_rect.mBottom + value;
+	}
+	setShape(new_rect, true);
+}
+
 S32 LLLayoutPanel::getVisibleDim() const
 {
 	F32 min_dim = getRelevantMinDim();
@@ -129,6 +148,12 @@ void LLLayoutPanel::setOrientation( LLLayoutStack::ELayoutOrientation orientatio
 		? getRect().getWidth()
 		: getRect().getHeight()));
 
+	if (mAutoResize == FALSE 
+		&& mUserResize == TRUE 
+		&& mMinDim == -1 )
+	{
+		setMinDim(layout_dim);
+	}
 	mTargetDim = llmax(layout_dim, getMinDim());
 }
  
@@ -166,12 +191,15 @@ void LLLayoutPanel::handleReshape(const LLRect& new_rect, bool by_user)
 	LLLayoutStack* stackp = dynamic_cast<LLLayoutStack*>(getParent());
 	if (stackp)
 	{
-		stackp->mNeedsLayout = true;
 		if (by_user)
-		{
-			// tell layout stack to account for new shape
+		{	// tell layout stack to account for new shape
+			
+			// make sure that panels have already been auto resized
+			stackp->updateLayout();
+			// now apply requested size to panel
 			stackp->updatePanelRect(this, new_rect);
 		}
+		stackp->mNeedsLayout = true;
 	}
 	LLPanel::handleReshape(new_rect, by_user);
 }
@@ -235,7 +263,6 @@ void LLLayoutStack::draw()
 			drawChild(panelp, 0, 0, !clip_rect.isEmpty());
 		}
 	}
-	mAnimatedThisFrame = false;
 }
 
 void LLLayoutStack::removeChild(LLView* view)
@@ -304,9 +331,8 @@ void LLLayoutStack::updateLayout()
 
 	if (!mNeedsLayout) return;
 
-	bool animation_in_progress = animatePanels();
+	bool continue_animating = animatePanels();
 	F32 total_visible_fraction = 0.f;
-	F32 total_open_fraction = 0.f;
 	S32 space_to_distribute = (mOrientation == HORIZONTAL)
 							? getRect().getWidth()
 							: getRect().getHeight();
@@ -318,20 +344,17 @@ void LLLayoutStack::updateLayout()
 		if (panelp->mAutoResize)
 		{
 			panelp->mTargetDim = panelp->getRelevantMinDim();
-			if (!panelp->mCollapsed && panelp->getVisible())
-			{
-				total_open_fraction += panelp->mFractionalSize;
-			}
 		}
 		space_to_distribute -= panelp->getVisibleDim() + llround((F32)mPanelSpacing * panelp->getVisibleAmount());
-		total_visible_fraction += panelp->mFractionalSize;
+		total_visible_fraction += panelp->mFractionalSize * panelp->getAutoResizeFactor();
 	}
 
-	llassert(total_visible_fraction < 1.01f);
+	llassert(total_visible_fraction < 1.05f);
 
 	// don't need spacing after last panel
 	space_to_distribute += panelp ? llround((F32)mPanelSpacing * panelp->getVisibleAmount()) : 0;
 
+	S32 remaining_space = space_to_distribute;
 	F32 fraction_distributed = 0.f;
 	if (space_to_distribute > 0 && total_visible_fraction > 0.f)
 	{	// give space proportionally to visible auto resize panels
@@ -343,26 +366,23 @@ void LLLayoutStack::updateLayout()
 				S32 delta = llround((F32)space_to_distribute * fraction_to_distribute);
 				fraction_distributed += fraction_to_distribute;
 				panelp->mTargetDim += delta;
+				remaining_space -= delta;
 			}
 		}
 	}
 
-	if (fraction_distributed < total_visible_fraction)
-	{	// distribute any left over pixels to non-collapsed, visible panels
-		F32 fraction_left = total_visible_fraction - fraction_distributed;
-		S32 space_left = llround((F32)space_to_distribute * (fraction_left / total_visible_fraction));
+	// distribute any left over pixels to non-collapsed, visible panels
+	BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
+	{
+		if (remaining_space == 0) break;
 
-		BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
+		if (panelp->mAutoResize 
+			&& !panelp->mCollapsed 
+			&& panelp->getVisible())
 		{
-			if (panelp->mAutoResize 
-				&& !panelp->mCollapsed 
-				&& panelp->getVisible())
-			{
-				S32 space_for_panel = llmax(0, llround((F32)space_left * (panelp->mFractionalSize / total_open_fraction)));
-				panelp->mTargetDim += space_for_panel;
-				space_left -= space_for_panel;
-				total_open_fraction -= panelp->mFractionalSize;
-			}
+			S32 space_for_panel = remaining_space > 0 ? 1 : -1;
+			panelp->mTargetDim += space_for_panel;
+			remaining_space -= space_for_panel;
 		}
 	}
 
@@ -416,7 +436,7 @@ void LLLayoutStack::updateLayout()
 
 	// clear animation flag at end, since panel resizes will set it
 	// and leave it set if there is any animation in progress
-	mNeedsLayout = animation_in_progress;
+	mNeedsLayout = continue_animating;
 } // end LLLayoutStack::updateLayout
 
 LLLayoutPanel* LLLayoutStack::findEmbeddedPanel(LLPanel* panelp) const
@@ -489,38 +509,52 @@ void LLLayoutStack::updateClass()
 	for (instance_iter it = beginInstances(); it != endInstances(); ++it)
 	{
 		it->updateLayout();
+		it->mAnimatedThisFrame = false;
 	}
 }
 
 void LLLayoutStack::updateFractionalSizes()
 {
-	F32 total_resizable_dim = 0;
-	S32 num_auto_resize_panels = 0;
+	F32 total_resizable_dim = 0.f;
 
 	BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
 	{
 		if (panelp->mAutoResize)
 		{
 			total_resizable_dim += llmax(0, panelp->getLayoutDim() - panelp->getRelevantMinDim());
-			num_auto_resize_panels++;
 		}
 	}
 
-	F32 total_fractional_size = 0.f;
-	
 	BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
 	{
 		if (panelp->mAutoResize)
 		{
 			F32 panel_resizable_dim = llmax(MIN_FRACTIONAL_SIZE, (F32)(panelp->getLayoutDim() - panelp->getRelevantMinDim()));
 			panelp->mFractionalSize = panel_resizable_dim > 0.f 
-										? llclamp(panel_resizable_dim / total_resizable_dim, MIN_FRACTIONAL_SIZE, MAX_FRACTIONAL_SIZE)
-										: MIN_FRACTIONAL_SIZE;
-			total_fractional_size += panelp->mFractionalSize;
+				? llclamp(panel_resizable_dim / total_resizable_dim, MIN_FRACTIONAL_SIZE, MAX_FRACTIONAL_SIZE)
+				: MIN_FRACTIONAL_SIZE;
 			llassert(!llisnan(panelp->mFractionalSize));
 		}
 	}
 
+	normalizeFractionalSizes();
+}
+
+
+void LLLayoutStack::normalizeFractionalSizes()
+{
+	S32 num_auto_resize_panels = 0;
+	F32 total_fractional_size = 0.f;
+	
+	BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
+	{
+		if (panelp->mAutoResize)
+		{
+			total_fractional_size += panelp->mFractionalSize;
+			num_auto_resize_panels++;
+		}
+	}
+
 	if (total_fractional_size == 0.f)
 	{ // equal distribution
 		BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
@@ -545,7 +579,7 @@ void LLLayoutStack::updateFractionalSizes()
 
 bool LLLayoutStack::animatePanels()
 {
-	bool animation_in_progress = false;
+	bool continue_animating = false;
 	
 	//
 	// animate visibility
@@ -565,14 +599,15 @@ bool LLLayoutStack::animatePanels()
 					}
 				}
 				
-				animation_in_progress = true;
+				mAnimatedThisFrame = true;
+				continue_animating = true;
 			}
 			else
 			{
 				if (panelp->mVisibleAmt != 1.f)
 				{
 					panelp->mVisibleAmt = 1.f;
-					animation_in_progress = true;
+					mAnimatedThisFrame = true;
 				}
 			}
 		}
@@ -589,14 +624,15 @@ bool LLLayoutStack::animatePanels()
 					}
 				}
 
-				animation_in_progress = true;
+				continue_animating = true;
+				mAnimatedThisFrame = true;
 			}
 			else
 			{
 				if (panelp->mVisibleAmt != 0.f)
 				{
 					panelp->mVisibleAmt = 0.f;
-					animation_in_progress = true;
+					mAnimatedThisFrame = true;
 				}
 			}
 		}
@@ -604,22 +640,31 @@ bool LLLayoutStack::animatePanels()
 		F32 collapse_state = panelp->mCollapsed ? 1.f : 0.f;
 		if (panelp->mCollapseAmt != collapse_state)
 		{
-			if (!mAnimatedThisFrame)
+			if (mAnimate)
 			{
-				panelp->mCollapseAmt = lerp(panelp->mCollapseAmt, collapse_state, LLCriticalDamp::getInterpolant(mCloseTimeConstant));
-			}
-			animation_in_progress = true;
+				if (!mAnimatedThisFrame)
+				{
+					panelp->mCollapseAmt = lerp(panelp->mCollapseAmt, collapse_state, LLCriticalDamp::getInterpolant(mCloseTimeConstant));
+				}
 			
-			if (llabs(panelp->mCollapseAmt - collapse_state) < 0.001f)
+				if (llabs(panelp->mCollapseAmt - collapse_state) < 0.001f)
+				{
+					panelp->mCollapseAmt = collapse_state;
+				}
+
+				mAnimatedThisFrame = true;
+				continue_animating = true;
+			}
+			else
 			{
 				panelp->mCollapseAmt = collapse_state;
+				mAnimatedThisFrame = true;
 			}
 		}
 	}
 
-	mAnimatedThisFrame = true;
-
-	return animation_in_progress;
+	if (mAnimatedThisFrame) mNeedsLayout = true;
+	return continue_animating;
 }
 
 void LLLayoutStack::updatePanelRect( LLLayoutPanel* resized_panel, const LLRect& new_rect )
@@ -632,7 +677,7 @@ void LLLayoutStack::updatePanelRect( LLLayoutPanel* resized_panel, const LLRect&
 
 	F32 total_visible_fraction = 0.f;
 	F32 delta_auto_resize_headroom = 0.f;
-	F32 total_auto_resize_headroom = 0.f;
+	F32 original_auto_resize_headroom = 0.f;
 
 	LLLayoutPanel* other_resize_panel = NULL;
 	LLLayoutPanel* following_panel = NULL;
@@ -641,8 +686,11 @@ void LLLayoutStack::updatePanelRect( LLLayoutPanel* resized_panel, const LLRect&
 	{
 		if (panelp->mAutoResize)
 		{
-			total_auto_resize_headroom += (F32)(panelp->mTargetDim - panelp->getRelevantMinDim());
-			total_visible_fraction += panelp->mFractionalSize * panelp->getAutoResizeFactor();
+			original_auto_resize_headroom += (F32)(panelp->mTargetDim - panelp->getRelevantMinDim());
+			if (panelp->getVisible() && !panelp->mCollapsed)
+			{
+				total_visible_fraction += panelp->mFractionalSize;
+			}
 		}
 
 		if (panelp == resized_panel)
@@ -656,18 +704,25 @@ void LLLayoutStack::updatePanelRect( LLLayoutPanel* resized_panel, const LLRect&
 		}
 	}
 
-	if (resized_panel->mAutoResize == FALSE)
+
+	if (resized_panel->mAutoResize)
 	{
-		delta_auto_resize_headroom += -delta_dim;
+		if (!other_resize_panel || !other_resize_panel->mAutoResize)
+		{
+			delta_auto_resize_headroom += delta_dim;	
+		}
 	}
-	if (other_resize_panel && other_resize_panel->mAutoResize == FALSE)
+	else 
 	{
-		delta_auto_resize_headroom += delta_dim;
+		if (!other_resize_panel || other_resize_panel->mAutoResize)
+		{
+			delta_auto_resize_headroom -= delta_dim;
+		}
 	}
 
 	F32 fraction_given_up = 0.f;
 	F32 fraction_remaining = 1.f;
-	F32 updated_auto_resize_headroom = total_auto_resize_headroom + delta_auto_resize_headroom;
+	F32 updated_auto_resize_headroom = original_auto_resize_headroom + delta_auto_resize_headroom;
 
 	enum
 	{
@@ -691,14 +746,15 @@ void LLLayoutStack::updatePanelRect( LLLayoutPanel* resized_panel, const LLRect&
 		case BEFORE_RESIZED_PANEL:
 			if (panelp->mAutoResize)
 			{	// freeze current size as fraction of overall auto_resize space
-				F32 fractional_adjustment_factor = total_auto_resize_headroom / updated_auto_resize_headroom;
+				F32 fractional_adjustment_factor = updated_auto_resize_headroom == 0.f
+													? 1.f
+													: original_auto_resize_headroom / updated_auto_resize_headroom;
 				F32 new_fractional_size = llclamp(panelp->mFractionalSize * fractional_adjustment_factor,
 													MIN_FRACTIONAL_SIZE,
 													MAX_FRACTIONAL_SIZE);
-				F32 fraction_delta = (new_fractional_size - panelp->mFractionalSize);
-				fraction_given_up -= fraction_delta;
+				fraction_given_up -= new_fractional_size - panelp->mFractionalSize;
 				fraction_remaining -= panelp->mFractionalSize;
-				panelp->mFractionalSize += fraction_delta;
+				panelp->mFractionalSize = new_fractional_size;
 				llassert(!llisnan(panelp->mFractionalSize));
 			}
 			else
@@ -711,7 +767,7 @@ void LLLayoutStack::updatePanelRect( LLLayoutPanel* resized_panel, const LLRect&
 			{	// freeze new size as fraction
 				F32 new_fractional_size = (updated_auto_resize_headroom == 0.f)
 					? MAX_FRACTIONAL_SIZE
-					: llclamp((F32)(new_dim - panelp->getRelevantMinDim()) / updated_auto_resize_headroom, MIN_FRACTIONAL_SIZE, MAX_FRACTIONAL_SIZE);
+					: llclamp(total_visible_fraction * (F32)(new_dim - panelp->getRelevantMinDim()) / updated_auto_resize_headroom, MIN_FRACTIONAL_SIZE, MAX_FRACTIONAL_SIZE);
 				fraction_given_up -= new_fractional_size - panelp->mFractionalSize;
 				fraction_remaining -= panelp->mFractionalSize;
 				panelp->mFractionalSize = new_fractional_size;
@@ -720,7 +776,6 @@ void LLLayoutStack::updatePanelRect( LLLayoutPanel* resized_panel, const LLRect&
 			else
 			{	// freeze new size as original size
 				panelp->mTargetDim = new_dim;
-				fraction_remaining -= fraction_given_up;
 			}
 			which_panel = NEXT_PANEL;
 			break;
@@ -728,14 +783,14 @@ void LLLayoutStack::updatePanelRect( LLLayoutPanel* resized_panel, const LLRect&
 			if (panelp->mAutoResize)
 			{
 				fraction_remaining -= panelp->mFractionalSize;
-				if (fraction_given_up != 0.f)
+				if (resized_panel->mAutoResize)
 				{
 					panelp->mFractionalSize = llclamp(panelp->mFractionalSize + fraction_given_up, MIN_FRACTIONAL_SIZE, MAX_FRACTIONAL_SIZE);
 					fraction_given_up = 0.f;
 				}
 				else
 				{
-					F32 new_fractional_size = llclamp((F32)(panelp->mTargetDim - panelp->getRelevantMinDim() + delta_auto_resize_headroom) 
+					F32 new_fractional_size = llclamp(total_visible_fraction * (F32)(panelp->mTargetDim - panelp->getRelevantMinDim() + delta_auto_resize_headroom) 
 														/ updated_auto_resize_headroom,
 													MIN_FRACTIONAL_SIZE,
 													MAX_FRACTIONAL_SIZE);
@@ -750,7 +805,7 @@ void LLLayoutStack::updatePanelRect( LLLayoutPanel* resized_panel, const LLRect&
 			which_panel = AFTER_RESIZED_PANEL;
 			break;
 		case AFTER_RESIZED_PANEL:
-			if (panelp->mAutoResize)
+			if (panelp->mAutoResize && fraction_given_up != 0.f)
 			{
 				panelp->mFractionalSize = llclamp(panelp->mFractionalSize + (panelp->mFractionalSize / fraction_remaining) * fraction_given_up,
 												MIN_FRACTIONAL_SIZE,
@@ -760,6 +815,8 @@ void LLLayoutStack::updatePanelRect( LLLayoutPanel* resized_panel, const LLRect&
 			break;
 		}
 	}
+	updateLayout();
+	normalizeFractionalSizes();
 }
 
 void LLLayoutStack::reshape(S32 width, S32 height, BOOL called_from_parent)
diff --git a/indra/llui/lllayoutstack.h b/indra/llui/lllayoutstack.h
index efe93f6def..648cd5fdce 100644
--- a/indra/llui/lllayoutstack.h
+++ b/indra/llui/lllayoutstack.h
@@ -72,7 +72,7 @@ public:
 	/*virtual*/ void draw();
 	/*virtual*/ void removeChild(LLView*);
 	/*virtual*/ BOOL postBuild();
-	/*virtual*/ bool addChild(LLView* child, S32 tab_group = 0);
+	/*virtual*/ bool addChild(LLView* child, S32 tab_groupdatefractuiona = 0);
 	/*virtual*/ void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
 
 
@@ -112,6 +112,7 @@ private:
 	LLLayoutPanel* findEmbeddedPanel(LLPanel* panelp) const;
 	LLLayoutPanel* findEmbeddedPanelByName(const std::string& name) const;
 	void updateFractionalSizes();
+	void normalizeFractionalSizes();
 	void updatePanelRect( LLLayoutPanel* param1, const LLRect& new_rect );
 
 	S32 mPanelSpacing;
@@ -154,10 +155,12 @@ public:
 	void setVisible(BOOL visible);
 
 	S32 getLayoutDim() const;
-	S32 getMinDim() const { return (mMinDim >= 0 || mAutoResize) ? llmax(0, mMinDim) : getLayoutDim(); }
+	S32 getTargetDim() const;
+	void setTargetDim(S32 value);
+	S32 getMinDim() const { return llmax(0, mMinDim); }
 	void setMinDim(S32 value) { mMinDim = value; }
 
-	S32 getExpandedMinDim() const { return mExpandedMinDim >= 0 ? mExpandedMinDim : mMinDim; }
+	S32 getExpandedMinDim() const { return mExpandedMinDim >= 0 ? mExpandedMinDim : getMinDim(); }
 	void setExpandedMinDim(S32 value) { mExpandedMinDim = value; }
 	
 	S32 getRelevantMinDim() const
diff --git a/indra/llui/lllineeditor.cpp b/indra/llui/lllineeditor.cpp
index 4d0b972bf1..1f7843b79d 100644
--- a/indra/llui/lllineeditor.cpp
+++ b/indra/llui/lllineeditor.cpp
@@ -1053,7 +1053,7 @@ void LLLineEditor::cut()
 		// Prepare for possible rollback
 		LLLineEditorRollback rollback( this );
 
-		gClipboard.copyFromSubstring( mText.getWString(), left_pos, length );
+		LLClipboard::instance().copyToClipboard( mText.getWString(), left_pos, length );
 		deleteSelection();
 
 		// Validate new string and rollback the if needed.
@@ -1084,13 +1084,13 @@ void LLLineEditor::copy()
 	{
 		S32 left_pos = llmin( mSelectionStart, mSelectionEnd );
 		S32 length = llabs( mSelectionStart - mSelectionEnd );
-		gClipboard.copyFromSubstring( mText.getWString(), left_pos, length );
+		LLClipboard::instance().copyToClipboard( mText.getWString(), left_pos, length );
 	}
 }
 
 BOOL LLLineEditor::canPaste() const
 {
-	return !mReadOnly && gClipboard.canPasteString(); 
+	return !mReadOnly && LLClipboard::instance().isTextAvailable(); 
 }
 
 void LLLineEditor::paste()
@@ -1121,14 +1121,7 @@ void LLLineEditor::pasteHelper(bool is_primary)
 	if (can_paste_it)
 	{
 		LLWString paste;
-		if (is_primary)
-		{
-			paste = gClipboard.getPastePrimaryWString();
-		}
-		else 
-		{
-			paste = gClipboard.getPasteWString();
-		}
+		LLClipboard::instance().pasteFromClipboard(paste, is_primary);
 
 		if (!paste.empty())
 		{
@@ -1215,13 +1208,13 @@ void LLLineEditor::copyPrimary()
 	{
 		S32 left_pos = llmin( mSelectionStart, mSelectionEnd );
 		S32 length = llabs( mSelectionStart - mSelectionEnd );
-		gClipboard.copyFromPrimarySubstring( mText.getWString(), left_pos, length );
+		LLClipboard::instance().copyToClipboard( mText.getWString(), left_pos, length, true);
 	}
 }
 
 BOOL LLLineEditor::canPastePrimary() const
 {
-	return !mReadOnly && gClipboard.canPastePrimaryString(); 
+	return !mReadOnly && LLClipboard::instance().isTextAvailable(true); 
 }
 
 void LLLineEditor::updatePrimary()
@@ -1636,7 +1629,7 @@ void LLLineEditor::draw()
 	LLRect background( 0, getRect().getHeight(), getRect().getWidth(), 0 );
 	background.stretch( -mBorderThickness );
 
-	S32 lineeditor_v_pad = llround((background.getHeight() - mGLFont->getLineHeight())/2);
+	S32 lineeditor_v_pad = (background.getHeight() - mGLFont->getLineHeight()) / 2;
 
 	drawBackground();
 	
diff --git a/indra/llui/llmenugl.cpp b/indra/llui/llmenugl.cpp
index 95ecbb1c94..ff6928ffda 100644
--- a/indra/llui/llmenugl.cpp
+++ b/indra/llui/llmenugl.cpp
@@ -317,7 +317,7 @@ void LLMenuItemGL::setJumpKey(KEY key)
 // virtual 
 U32 LLMenuItemGL::getNominalHeight( void ) const 
 { 
-	return llround(mFont->getLineHeight()) + MENU_ITEM_PADDING; 
+	return mFont->getLineHeight() + MENU_ITEM_PADDING;
 }
 
 //virtual
@@ -508,19 +508,19 @@ void LLMenuItemGL::draw( void )
 	{
 		if( !mDrawBoolLabel.empty() )
 		{
-			mFont->render( mDrawBoolLabel.getWString(), 0, (F32)LEFT_PAD_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f) + 1.f, color,
+			mFont->render( mDrawBoolLabel.getWString(), 0, (F32)LEFT_PAD_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f), color,
 						   LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, LLFontGL::NO_SHADOW, S32_MAX, S32_MAX, NULL, FALSE );
 		}
-		mFont->render( mLabel.getWString(), 0, (F32)LEFT_PLAIN_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f) + 1.f, color,
+		mFont->render( mLabel.getWString(), 0, (F32)LEFT_PLAIN_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f), color,
 					   LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, LLFontGL::NO_SHADOW, S32_MAX, S32_MAX, NULL, FALSE );
 		if( !mDrawAccelLabel.empty() )
 		{
-			mFont->render( mDrawAccelLabel.getWString(), 0, (F32)getRect().mRight - (F32)RIGHT_PLAIN_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f) + 1.f, color,
+			mFont->render( mDrawAccelLabel.getWString(), 0, (F32)getRect().mRight - (F32)RIGHT_PLAIN_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f), color,
 						   LLFontGL::RIGHT, LLFontGL::BOTTOM, LLFontGL::NORMAL, LLFontGL::NO_SHADOW, S32_MAX, S32_MAX, NULL, FALSE );
 		}
 		if( !mDrawBranchLabel.empty() )
 		{
-			mFont->render( mDrawBranchLabel.getWString(), 0, (F32)getRect().mRight - (F32)RIGHT_PAD_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f) + 1.f, color,
+			mFont->render( mDrawBranchLabel.getWString(), 0, (F32)getRect().mRight - (F32)RIGHT_PAD_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f), color,
 						   LLFontGL::RIGHT, LLFontGL::BOTTOM, LLFontGL::NORMAL, LLFontGL::NO_SHADOW, S32_MAX, S32_MAX, NULL, FALSE );
 		}
 	}
@@ -1966,7 +1966,7 @@ void LLMenuGL::arrange( void )
 
 		// *FIX: create the item first and then ask for its dimensions?
 		S32 spillover_item_width = PLAIN_PAD_PIXELS + LLFontGL::getFontSansSerif()->getWidth( std::string("More") ); // *TODO: Translate
-		S32 spillover_item_height = llround(LLFontGL::getFontSansSerif()->getLineHeight()) + MENU_ITEM_PADDING;
+		S32 spillover_item_height = LLFontGL::getFontSansSerif()->getLineHeight() + MENU_ITEM_PADDING;
 
 		// Scrolling support
 		item_list_t::iterator first_visible_item_iter;
@@ -3082,7 +3082,7 @@ void LLMenuGL::showPopup(LLView* spawning_view, LLMenuGL* menu, S32 x, S32 y)
 		mouse_y + MOUSE_CURSOR_PADDING, 
 		CURSOR_WIDTH + MOUSE_CURSOR_PADDING * 2, 
 		CURSOR_HEIGHT + MOUSE_CURSOR_PADDING * 2);
-	menu->translateIntoRectWithExclusion( menu_region_rect, mouse_rect, FALSE );
+	menu->translateIntoRectWithExclusion( menu_region_rect, mouse_rect );
 	menu->getParent()->sendChildToFront(menu);
 }
 
@@ -3425,7 +3425,7 @@ void LLMenuHolderGL::draw()
 		
 		LLUI::pushMatrix();
 		{
-			LLUI::translate((F32)item_rect.mLeft, (F32)item_rect.mBottom, 0.f);
+			LLUI::translate((F32)item_rect.mLeft, (F32)item_rect.mBottom);
 			selecteditem->getMenu()->drawBackground(selecteditem, interpolant);
 			selecteditem->draw();
 		}
diff --git a/indra/llui/llnotifications.cpp b/indra/llui/llnotifications.cpp
index d232e27ef2..8aa548b974 100644
--- a/indra/llui/llnotifications.cpp
+++ b/indra/llui/llnotifications.cpp
@@ -1412,6 +1412,7 @@ void addPathIfExists(const std::string& new_path, std::vector<std::string>& path
 
 bool LLNotifications::loadTemplates()
 {
+	llinfos << "Reading notifications template" << llendl;
 	std::vector<std::string> search_paths;
 	
 	std::string skin_relative_path = gDirUtilp->getDirDelimiter() + LLUI::getSkinPath() + gDirUtilp->getDirDelimiter() + "notifications.xml";
@@ -1484,6 +1485,8 @@ bool LLNotifications::loadTemplates()
 		mTemplates[notification.name] = LLNotificationTemplatePtr(new LLNotificationTemplate(notification));
 	}
 
+	llinfos << "...done" << llendl;
+
 	return true;
 }
 
diff --git a/indra/llui/llnotifications.h b/indra/llui/llnotifications.h
index 462d69be2e..3df2efcac3 100644
--- a/indra/llui/llnotifications.h
+++ b/indra/llui/llnotifications.h
@@ -690,7 +690,7 @@ typedef std::multimap<std::string, LLNotificationPtr> LLNotificationMap;
 // Abstract base class (interface) for a channel; also used for the master container.
 // This lets us arrange channels into a call hierarchy.
 
-// We maintain a heirarchy of notification channels; events are always started at the top
+// We maintain a hierarchy of notification channels; events are always started at the top
 // and propagated through the hierarchy only if they pass a filter.
 // Any channel can be created with a parent. A null parent (empty string) means it's
 // tied to the root of the tree (the LLNotifications class itself).
diff --git a/indra/llui/llscrollcontainer.cpp b/indra/llui/llscrollcontainer.cpp
index ad4cc20d9a..9b7e30bb04 100644
--- a/indra/llui/llscrollcontainer.cpp
+++ b/indra/llui/llscrollcontainer.cpp
@@ -378,19 +378,24 @@ void LLScrollContainer::calcVisibleSize( S32 *visible_width, S32 *visible_height
 
 	if (!mHideScrollbar)
 	{
-		if( *visible_height < doc_height )
+		// Note: 1 pixel change can happen on final animation and should not trigger 
+		// the display of sliders.
+		if ((doc_height - *visible_height) > 1)
 		{
 			*show_v_scrollbar = TRUE;
 			*visible_width -= scrollbar_size;
 		}
-
-		if( *visible_width < doc_width )
+		if ((doc_width - *visible_width) > 1)
 		{
 			*show_h_scrollbar = TRUE;
 			*visible_height -= scrollbar_size;
 
+			// The view inside the scroll container should not be extended
+			// to container's full height to ensure the correct computation
+			// of *show_v_scrollbar after subtracting horizontal scrollbar_size.
+
 			// Must retest now that visible_height has changed
-			if( !*show_v_scrollbar && (*visible_height < doc_height) )
+			if( !*show_v_scrollbar && ((doc_height - *visible_height) > 1) )
 			{
 				*show_v_scrollbar = TRUE;
 				*visible_width -= scrollbar_size;
diff --git a/indra/llui/llscrollcontainer.h b/indra/llui/llscrollcontainer.h
index 3aa79cc255..d87c95b3d7 100644
--- a/indra/llui/llscrollcontainer.h
+++ b/indra/llui/llscrollcontainer.h
@@ -91,7 +91,7 @@ public:
 	void			setReserveScrollCorner( BOOL b ) { mReserveScrollCorner = b; }
 	LLRect			getVisibleContentRect();
 	LLRect			getContentWindowRect();
-	const LLRect&	getScrolledViewRect() const { return mScrolledView ? mScrolledView->getRect() : LLRect::null; }
+	virtual const LLRect	getScrolledViewRect() const { return mScrolledView ? mScrolledView->getRect() : LLRect::null; }
 	void			pageUp(S32 overlap = 0);
 	void			pageDown(S32 overlap = 0);
 	void			goToTop();
@@ -116,6 +116,9 @@ public:
 	
 	bool autoScroll(S32 x, S32 y);
 
+protected:
+	LLView*		mScrolledView;
+
 private:
 	// internal scrollbar handlers
 	virtual void scrollHorizontal( S32 new_pos );
@@ -124,7 +127,6 @@ private:
 	void calcVisibleSize( S32 *visible_width, S32 *visible_height, BOOL* show_h_scrollbar, BOOL* show_v_scrollbar ) const;
 
 	LLScrollbar* mScrollbar[SCROLLBAR_COUNT];
-	LLView*		mScrolledView;
 	S32			mSize;
 	BOOL		mIsOpaque;
 	LLUIColor	mBackgroundColor;
diff --git a/indra/llui/llscrolllistcell.cpp b/indra/llui/llscrolllistcell.cpp
index 9d25c7180d..8000efad0e 100644
--- a/indra/llui/llscrolllistcell.cpp
+++ b/indra/llui/llscrolllistcell.cpp
@@ -232,7 +232,7 @@ BOOL LLScrollListText::getVisible() const
 //virtual 
 S32 LLScrollListText::getHeight() const
 {
-	return llround(mFont->getLineHeight());
+	return mFont->getLineHeight();
 }
 
 
@@ -306,7 +306,7 @@ void LLScrollListText::draw(const LLColor4& color, const LLColor4& highlight_col
 			break;
 		}
 		LLRect highlight_rect(left - 2, 
-				llround(mFont->getLineHeight()) + 1, 
+				mFont->getLineHeight() + 1, 
 				left + mFont->getWidth(mText.getString(), mHighlightOffset, mHighlightCount) + 1, 
 				1);
 		mRoundedRectImage->draw(highlight_rect, highlight_color);
@@ -329,7 +329,7 @@ void LLScrollListText::draw(const LLColor4& color, const LLColor4& highlight_col
 		break;
 	}
 	mFont->render(mText.getWString(), 0, 
-					start_x, 2.f,
+					start_x, 0.f,
 					display_color,
 					mFontAlignment,
 					LLFontGL::BOTTOM, 
diff --git a/indra/llui/llscrolllistctrl.cpp b/indra/llui/llscrolllistctrl.cpp
index 466fac33ea..b3e1b63db5 100644
--- a/indra/llui/llscrolllistctrl.cpp
+++ b/indra/llui/llscrolllistctrl.cpp
@@ -2504,7 +2504,7 @@ void	LLScrollListCtrl::copy()
 	{
 		buffer += (*itor)->getContentsCSV() + "\n";
 	}
-	gClipboard.copyFromSubstring(utf8str_to_wstring(buffer), 0, buffer.length());
+	LLClipboard::instance().copyToClipboard(utf8str_to_wstring(buffer), 0, buffer.length());
 }
 
 // virtual
diff --git a/indra/llui/llscrolllistitem.cpp b/indra/llui/llscrolllistitem.cpp
index d95752e31c..5a1e96ab03 100644
--- a/indra/llui/llscrolllistitem.cpp
+++ b/indra/llui/llscrolllistitem.cpp
@@ -138,7 +138,7 @@ void LLScrollListItem::draw(const LLRect& rect, const LLColor4& fg_color, const
 
 		LLUI::pushMatrix();
 		{
-			LLUI::translate((F32) cur_x, (F32) rect.mBottom, 0.0f);
+			LLUI::translate((F32) cur_x, (F32) rect.mBottom);
 
 			cell->draw( fg_color, highlight_color );
 		}
diff --git a/indra/llui/llscrolllistitem.h b/indra/llui/llscrolllistitem.h
index 611df729b4..13655b5873 100644
--- a/indra/llui/llscrolllistitem.h
+++ b/indra/llui/llscrolllistitem.h
@@ -33,10 +33,10 @@
 #include "v4color.h"
 #include "llinitparam.h"
 #include "llscrolllistcell.h"
+#include "llcoord.h"
 
 #include <vector>
 
-class LLCoordGL;
 class LLCheckBoxCtrl;
 class LLResizeBar;
 class LLScrollListCtrl;
diff --git a/indra/llui/lltextbase.cpp b/indra/llui/lltextbase.cpp
index 0040be45c7..7aeeae298f 100644
--- a/indra/llui/lltextbase.cpp
+++ b/indra/llui/lltextbase.cpp
@@ -1192,7 +1192,10 @@ void LLTextBase::reflow()
 
 		// shrink document to minimum size (visible portion of text widget)
 		// to force inlined widgets with follows set to shrink
-		mDocumentView->reshape(mVisibleTextRect.getWidth(), mDocumentView->getRect().getHeight());
+		if (mWordWrap)
+		{
+			mDocumentView->reshape(mVisibleTextRect.getWidth(), mDocumentView->getRect().getHeight());
+		}
 
 		S32 cur_top = 0;
 
@@ -2157,7 +2160,7 @@ LLRect LLTextBase::getLocalRectFromDocIndex(S32 pos) const
 	{ 
 		// return default height rect in upper left
 		local_rect = content_window_rect;
-		local_rect.mBottom = local_rect.mTop - (S32)(mDefaultFont->getLineHeight());
+		local_rect.mBottom = local_rect.mTop - mDefaultFont->getLineHeight();
 		return local_rect;
 	}
 
@@ -2380,6 +2383,9 @@ S32 LLTextBase::getEditableIndex(S32 index, bool increasing_direction)
 
 void LLTextBase::updateRects()
 {
+	LLRect old_text_rect = mVisibleTextRect;
+	mVisibleTextRect = mScroller ? mScroller->getContentWindowRect() : getLocalRect();
+
 	if (mLineInfoList.empty()) 
 	{
 		mTextBoundingRect = LLRect(0, mVPad, mHPad, 0);
@@ -2395,10 +2401,24 @@ void LLTextBase::updateRects()
 		}
 
 		mTextBoundingRect.mTop += mVPad;
-		// subtract a pixel off the bottom to deal with rounding errors in measuring font height
-		mTextBoundingRect.mBottom -= 1;
 
-		S32 delta_pos = -mTextBoundingRect.mBottom;
+		S32 delta_pos = 0;
+		
+		switch(mVAlign)
+		{
+		case LLFontGL::TOP:
+			delta_pos = llmax(mVisibleTextRect.getHeight() - mTextBoundingRect.mTop, -mTextBoundingRect.mBottom);
+			break;
+		case LLFontGL::VCENTER:
+			delta_pos = (llmax(mVisibleTextRect.getHeight() - mTextBoundingRect.mTop, -mTextBoundingRect.mBottom) + (mVisibleTextRect.mBottom - mTextBoundingRect.mBottom)) / 2;
+			break;
+		case LLFontGL::BOTTOM:
+			delta_pos = mVisibleTextRect.mBottom - mTextBoundingRect.mBottom;
+			break;
+		case LLFontGL::BASELINE:
+			// do nothing
+			break;
+		}
 		// move line segments to fit new document rect
 		for (line_list_t::iterator it = mLineInfoList.begin(); it != mLineInfoList.end(); ++it)
 		{
@@ -2408,8 +2428,9 @@ void LLTextBase::updateRects()
 	}
 
 	// update document container dimensions according to text contents
-	LLRect doc_rect = mTextBoundingRect;
+	LLRect doc_rect;
 	// use old mVisibleTextRect constraint document to width of viewable region
+	doc_rect.mBottom = llmin(mVisibleTextRect.mBottom,  mTextBoundingRect.mBottom);
 	doc_rect.mLeft = 0;
 
 	// allow horizontal scrolling?
@@ -2419,11 +2440,22 @@ void LLTextBase::updateRects()
 	doc_rect.mRight = mScroller 
 		? llmax(mVisibleTextRect.getWidth(), mTextBoundingRect.mRight)
 		: mVisibleTextRect.getWidth();
+	doc_rect.mTop = llmax(mVisibleTextRect.mTop, mTextBoundingRect.mTop);
 
 	if (!mScroller)
 	{
 		// push doc rect to top of text widget
-		doc_rect.translate(0, mVisibleTextRect.getHeight() - doc_rect.mTop);
+		switch(mVAlign)
+		{
+		case LLFontGL::TOP:
+			doc_rect.translate(0, mVisibleTextRect.getHeight() - doc_rect.mTop);
+			break;
+		case LLFontGL::VCENTER:
+			doc_rect.translate(0, (mVisibleTextRect.getHeight() - doc_rect.mTop) / 2);
+		case LLFontGL::BOTTOM:
+		default:
+			break;
+		}
 	}
 
 	mDocumentView->setShape(doc_rect);
@@ -2431,7 +2463,6 @@ void LLTextBase::updateRects()
 	//update mVisibleTextRect *after* mDocumentView has been resized
 	// so that scrollbars are added if document needs to scroll
 	// since mVisibleTextRect does not include scrollbars
-	LLRect old_text_rect = mVisibleTextRect;
 	mVisibleTextRect = mScroller ? mScroller->getContentWindowRect() : getLocalRect();
 	//FIXME: replace border with image?
 	if (mBorderVisible)
@@ -2444,9 +2475,27 @@ void LLTextBase::updateRects()
 	}
 
 	// update document container again, using new mVisibleTextRect (that has scrollbars enabled as needed)
+	doc_rect.mBottom = llmin(mVisibleTextRect.mBottom,  mTextBoundingRect.mBottom);
+	doc_rect.mLeft = 0;
 	doc_rect.mRight = mScroller 
 		? llmax(mVisibleTextRect.getWidth(), mTextBoundingRect.mRight)
 		: mVisibleTextRect.getWidth();
+	doc_rect.mTop = llmax(mVisibleTextRect.mTop, mTextBoundingRect.mTop);
+	if (!mScroller)
+	{
+		// push doc rect to top of text widget
+		switch(mVAlign)
+		{
+		case LLFontGL::TOP:
+			doc_rect.translate(0, mVisibleTextRect.getHeight() - doc_rect.mTop);
+			break;
+		case LLFontGL::VCENTER:
+			doc_rect.translate(0, (mVisibleTextRect.getHeight() - doc_rect.mTop) / 2);
+		case LLFontGL::BOTTOM:
+		default:
+			break;
+		}
+	}
 	mDocumentView->setShape(doc_rect);
 }
 
@@ -2560,8 +2609,7 @@ BOOL LLTextSegment::handleScrollWheel(S32 x, S32 y, S32 clicks) { return FALSE;
 BOOL LLTextSegment::handleToolTip(S32 x, S32 y, MASK mask) { return FALSE; }
 const std::string&	LLTextSegment::getName() const 
 {
-	static std::string empty_string("");
-	return empty_string; 
+	return LLStringUtil::null;
 }
 void LLTextSegment::onMouseCaptureLost() {}
 void LLTextSegment::screenPointToLocal(S32 screen_x, S32 screen_y, S32* local_x, S32* local_y) const {}
@@ -2578,7 +2626,7 @@ LLNormalTextSegment::LLNormalTextSegment( LLStyleConstSP style, S32 start, S32 e
 	mToken(NULL),
 	mEditor(editor)
 {
-	mFontHeight = llceil(mStyle->getFont()->getLineHeight());
+	mFontHeight = mStyle->getFont()->getLineHeight();
 
 	LLUIImagePtr image = mStyle->getImage();
 	if (image.notNull())
@@ -2594,7 +2642,7 @@ LLNormalTextSegment::LLNormalTextSegment( const LLColor4& color, S32 start, S32
 {
 	mStyle = new LLStyle(LLStyle::Params().visible(is_visible).color(color));
 
-	mFontHeight = llceil(mStyle->getFont()->getLineHeight());
+	mFontHeight = mStyle->getFont()->getLineHeight();
 }
 
 LLNormalTextSegment::~LLNormalTextSegment()
@@ -2962,11 +3010,11 @@ LLLineBreakTextSegment::LLLineBreakTextSegment(S32 pos):LLTextSegment(pos,pos+1)
 {
 	LLStyleSP s( new LLStyle(LLStyle::Params().visible(true)));
 
-	mFontHeight = llceil(s->getFont()->getLineHeight());
+	mFontHeight = s->getFont()->getLineHeight();
 }
 LLLineBreakTextSegment::LLLineBreakTextSegment(LLStyleConstSP style,S32 pos):LLTextSegment(pos,pos+1)
 {
-	mFontHeight = llceil(style->getFont()->getLineHeight());
+	mFontHeight = style->getFont()->getLineHeight();
 }
 LLLineBreakTextSegment::~LLLineBreakTextSegment()
 {
@@ -3003,7 +3051,7 @@ static const S32 IMAGE_HPAD = 3;
 bool LLImageTextSegment::getDimensions(S32 first_char, S32 num_chars, S32& width, S32& height) const
 {
 	width = 0;
-	height = llceil(mStyle->getFont()->getLineHeight());;
+	height = mStyle->getFont()->getLineHeight();
 
 	LLUIImagePtr image = mStyle->getImage();
 	if( num_chars>0 && image.notNull())
diff --git a/indra/llui/lltexteditor.cpp b/indra/llui/lltexteditor.cpp
index 3a23ce1cac..9720dded6c 100644
--- a/indra/llui/lltexteditor.cpp
+++ b/indra/llui/lltexteditor.cpp
@@ -1332,7 +1332,7 @@ void LLTextEditor::cut()
 	}
 	S32 left_pos = llmin( mSelectionStart, mSelectionEnd );
 	S32 length = llabs( mSelectionStart - mSelectionEnd );
-	gClipboard.copyFromSubstring( getWText(), left_pos, length, mSourceID );
+	LLClipboard::instance().copyToClipboard( getWText(), left_pos, length);
 	deleteSelection( FALSE );
 
 	onKeyStroke();
@@ -1352,12 +1352,12 @@ void LLTextEditor::copy()
 	}
 	S32 left_pos = llmin( mSelectionStart, mSelectionEnd );
 	S32 length = llabs( mSelectionStart - mSelectionEnd );
-	gClipboard.copyFromSubstring(getWText(), left_pos, length, mSourceID);
+	LLClipboard::instance().copyToClipboard(getWText(), left_pos, length);
 }
 
 BOOL LLTextEditor::canPaste() const
 {
-	return !mReadOnly && gClipboard.canPasteString();
+	return !mReadOnly && LLClipboard::instance().isTextAvailable();
 }
 
 // paste from clipboard
@@ -1393,16 +1393,8 @@ void LLTextEditor::pasteHelper(bool is_primary)
 		return;
 	}
 
-	LLUUID source_id;
 	LLWString paste;
-	if (is_primary)
-	{
-		paste = gClipboard.getPastePrimaryWString(&source_id);
-	}
-	else 
-	{
-		paste = gClipboard.getPasteWString(&source_id);
-	}
+	LLClipboard::instance().pasteFromClipboard(paste, is_primary);
 
 	if (paste.empty())
 	{
@@ -1475,12 +1467,12 @@ void LLTextEditor::copyPrimary()
 	}
 	S32 left_pos = llmin( mSelectionStart, mSelectionEnd );
 	S32 length = llabs( mSelectionStart - mSelectionEnd );
-	gClipboard.copyFromPrimarySubstring(getWText(), left_pos, length, mSourceID);
+	LLClipboard::instance().copyToClipboard(getWText(), left_pos, length, true);
 }
 
 BOOL LLTextEditor::canPastePrimary() const
 {
-	return !mReadOnly && gClipboard.canPastePrimaryString();
+	return !mReadOnly && LLClipboard::instance().isTextAvailable(true);
 }
 
 void LLTextEditor::updatePrimary()
@@ -1992,7 +1984,7 @@ void LLTextEditor::drawPreeditMarker()
 		return;
 	}
 		
-	const S32 line_height = llround( mDefaultFont->getLineHeight() );
+	const S32 line_height = mDefaultFont->getLineHeight();
 
 	S32 line_start = getLineStart(cur_line);
 	S32 line_y = mVisibleTextRect.mTop - line_height;
@@ -2715,7 +2707,7 @@ BOOL LLTextEditor::getPreeditLocation(S32 query_offset, LLCoordGL *coord, LLRect
 
     const LLWString textString(getWText());
 	const llwchar * const text = textString.c_str();
-	const S32 line_height = llround(mDefaultFont->getLineHeight());
+	const S32 line_height = mDefaultFont->getLineHeight();
 
 	if (coord)
 	{
@@ -2818,7 +2810,7 @@ void LLTextEditor::markAsPreedit(S32 position, S32 length)
 
 S32 LLTextEditor::getPreeditFontSize() const
 {
-	return llround(mDefaultFont->getLineHeight() * LLUI::sGLScaleFactor.mV[VY]);
+	return llround((F32)mDefaultFont->getLineHeight() * LLUI::sGLScaleFactor.mV[VY]);
 }
 
 BOOL LLTextEditor::isDirty() const
diff --git a/indra/llui/lltoolbar.cpp b/indra/llui/lltoolbar.cpp
index 9b31a6449d..81ea0ebf0c 100644
--- a/indra/llui/lltoolbar.cpp
+++ b/indra/llui/lltoolbar.cpp
@@ -827,7 +827,7 @@ void LLToolBar::draw()
 	// rect may have shifted during layout
 	LLUI::popMatrix();
 	LLUI::pushMatrix();
-	LLUI::translate((F32)getRect().mLeft, (F32)getRect().mBottom, 0.f);
+	LLUI::translate((F32)getRect().mLeft, (F32)getRect().mBottom);
 
 	// Position the caret 
 	LLIconCtrl* caret = getChild<LLIconCtrl>("caret");
diff --git a/indra/llui/lltooltip.cpp b/indra/llui/lltooltip.cpp
index 23cdd9ad9a..f737d48abf 100644
--- a/indra/llui/lltooltip.cpp
+++ b/indra/llui/lltooltip.cpp
@@ -180,6 +180,7 @@ LLToolTip::LLToolTip(const LLToolTip::Params& p)
 	params.font = p.font;
 	params.use_ellipses = true;
 	params.wrap = p.wrap;
+	params.font_valign = LLFontGL::VCENTER;
 	params.parse_urls = false; // disallow hyperlinks in tooltips, as they want to spawn their own explanatory tooltips
 	mTextBox = LLUICtrlFactory::create<LLTextBox> (params);
 	addChild(mTextBox);
@@ -190,7 +191,6 @@ LLToolTip::LLToolTip(const LLToolTip::Params& p)
 	{
 		LLButton::Params icon_params;
 		icon_params.name = "tooltip_info";
-		icon_params.label(""); // provid label but set to empty so name does not overwrite it -angela
 		LLRect icon_rect;
 		LLUIImage* imagep = p.image;
 		TOOLTIP_ICON_SIZE = (imagep ? imagep->getWidth() : 16);
@@ -291,6 +291,12 @@ void LLToolTip::initFromParams(const LLToolTip::Params& p)
 	S32 text_width = llmin(p.max_width(), mTextBox->getTextPixelWidth());
 	S32 text_height = mTextBox->getTextPixelHeight();
 	mTextBox->reshape(text_width, text_height);
+	if (mInfoButton)
+	{
+		LLRect text_rect = mTextBox->getRect();
+		LLRect icon_rect = mInfoButton->getRect();
+		mTextBox->translate(0, icon_rect.getCenterY() - text_rect.getCenterY());
+	}
 
 	// reshape tooltip panel to fit text box
 	LLRect tooltip_rect = calcBoundingRect();
@@ -299,6 +305,8 @@ void LLToolTip::initFromParams(const LLToolTip::Params& p)
 	tooltip_rect.mBottom = 0;
 	tooltip_rect.mLeft = 0;
 
+	mTextBox->reshape(mTextBox->getRect().getWidth(), llmax(mTextBox->getRect().getHeight(), tooltip_rect.getHeight() - 2 * mPadding));
+
 	setShape(tooltip_rect);
 }
 
diff --git a/indra/llui/llui.cpp b/indra/llui/llui.cpp
index 6b74c5a6be..b5e27616b7 100644
--- a/indra/llui/llui.cpp
+++ b/indra/llui/llui.cpp
@@ -972,43 +972,53 @@ void gl_ring( F32 radius, F32 width, const LLColor4& center_color, const LLColor
 // Draw gray and white checkerboard with black border
 void gl_rect_2d_checkerboard(const LLRect& rect, GLfloat alpha)
 {
-	// Initialize the first time this is called.
-	const S32 PIXELS = 32;
-	static GLubyte checkerboard[PIXELS * PIXELS];
-	static BOOL first = TRUE;
-	if( first )
-	{
-		for( S32 i = 0; i < PIXELS; i++ )
+	if (!LLGLSLShader::sNoFixedFunction)
+	{ 
+		// Initialize the first time this is called.
+		const S32 PIXELS = 32;
+		static GLubyte checkerboard[PIXELS * PIXELS];
+		static BOOL first = TRUE;
+		if( first )
 		{
-			for( S32 j = 0; j < PIXELS; j++ )
+			for( S32 i = 0; i < PIXELS; i++ )
 			{
-				checkerboard[i * PIXELS + j] = ((i & 1) ^ (j & 1)) * 0xFF;
+				for( S32 j = 0; j < PIXELS; j++ )
+				{
+					checkerboard[i * PIXELS + j] = ((i & 1) ^ (j & 1)) * 0xFF;
+				}
 			}
+			first = FALSE;
 		}
-		first = FALSE;
-	}
 	
-	gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
+		gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
 
-	// ...white squares
-	gGL.color4f( 1.f, 1.f, 1.f, alpha );
-	gl_rect_2d(rect);
+		// ...white squares
+		gGL.color4f( 1.f, 1.f, 1.f, alpha );
+		gl_rect_2d(rect);
 
-	// ...gray squares
-	gGL.color4f( .7f, .7f, .7f, alpha );
-	gGL.flush();
+		// ...gray squares
+		gGL.color4f( .7f, .7f, .7f, alpha );
+		gGL.flush();
 
-	if (!LLGLSLShader::sNoFixedFunction)
-	{ //polygon stipple is deprecated
 		glPolygonStipple( checkerboard );
 
 		LLGLEnable polygon_stipple(GL_POLYGON_STIPPLE);
 		gl_rect_2d(rect);
 	}
 	else
-	{
-		gl_rect_2d(rect);
+	{ //polygon stipple is deprecated, use "Checker" texture
+		LLPointer<LLUIImage> img = LLUI::getUIImage("Checker");
+		gGL.getTexUnit(0)->bind(img->getImage());
+		gGL.getTexUnit(0)->setTextureAddressMode(LLTexUnit::TAM_WRAP);
+		gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_POINT);
+
+		LLColor4 color(1.f, 1.f, 1.f, alpha);
+		LLRectf uv_rect(0, 0, rect.getWidth()/32.f, rect.getHeight()/32.f);
+
+		gl_draw_scaled_image(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(),
+			img->getImage(), color, uv_rect);
 	}
+	
 	gGL.flush();
 }
 
@@ -1688,21 +1698,22 @@ void LLUI::translate(F32 x, F32 y, F32 z)
 	gGL.translateUI(x,y,z);
 	LLFontGL::sCurOrigin.mX += (S32) x;
 	LLFontGL::sCurOrigin.mY += (S32) y;
-	LLFontGL::sCurOrigin.mZ += z;
+	LLFontGL::sCurDepth += z;
 }
 
 //static
 void LLUI::pushMatrix()
 {
 	gGL.pushUIMatrix();
-	LLFontGL::sOriginStack.push_back(LLFontGL::sCurOrigin);
+	LLFontGL::sOriginStack.push_back(std::make_pair(LLFontGL::sCurOrigin, LLFontGL::sCurDepth));
 }
 
 //static
 void LLUI::popMatrix()
 {
 	gGL.popUIMatrix();
-	LLFontGL::sCurOrigin = *LLFontGL::sOriginStack.rbegin();
+	LLFontGL::sCurOrigin = LLFontGL::sOriginStack.back().first;
+	LLFontGL::sCurDepth = LLFontGL::sOriginStack.back().second;
 	LLFontGL::sOriginStack.pop_back();
 }
 
@@ -1712,7 +1723,7 @@ void LLUI::loadIdentity()
 	gGL.loadUIIdentity(); 
 	LLFontGL::sCurOrigin.mX = 0;
 	LLFontGL::sCurOrigin.mY = 0;
-	LLFontGL::sCurOrigin.mZ = 0;
+	LLFontGL::sCurDepth = 0.f;
 }
 
 //static
@@ -1735,10 +1746,7 @@ void LLUI::setMousePositionScreen(S32 x, S32 y)
 	screen_x = llround((F32)x * sGLScaleFactor.mV[VX]);
 	screen_y = llround((F32)y * sGLScaleFactor.mV[VY]);
 	
-	LLCoordWindow window_point;
-	LLView::getWindow()->convertCoords(LLCoordGL(screen_x, screen_y), &window_point);
-
-	LLView::getWindow()->setCursorPosition(window_point);
+	LLView::getWindow()->setCursorPosition(LLCoordGL(screen_x, screen_y).convert());
 }
 
 //static 
@@ -1746,8 +1754,7 @@ void LLUI::getMousePositionScreen(S32 *x, S32 *y)
 {
 	LLCoordWindow cursor_pos_window;
 	getWindow()->getCursorPosition(&cursor_pos_window);
-	LLCoordGL cursor_pos_gl;
-	getWindow()->convertCoords(cursor_pos_window, &cursor_pos_gl);
+	LLCoordGL cursor_pos_gl(cursor_pos_window.convert());
 	*x = llround((F32)cursor_pos_gl.mX / sGLScaleFactor.mV[VX]);
 	*y = llround((F32)cursor_pos_gl.mY / sGLScaleFactor.mV[VX]);
 }
@@ -2052,7 +2059,7 @@ void LLUI::positionViewNearMouse(LLView* view, S32 spawn_x, S32 spawn_y)
 	// Start at spawn position (using left/top)
 	view->setOrigin( local_x, local_y - view->getRect().getHeight());
 	// Make sure we're on-screen and not overlapping the mouse
-	view->translateIntoRectWithExclusion( virtual_window_rect, mouse_rect, FALSE );
+	view->translateIntoRectWithExclusion( virtual_window_rect, mouse_rect );
 }
 
 LLView* LLUI::resolvePath(LLView* context, const std::string& path)
diff --git a/indra/llui/lluistring.cpp b/indra/llui/lluistring.cpp
index ac69d3bf85..c4e073ccdb 100644
--- a/indra/llui/lluistring.cpp
+++ b/indra/llui/lluistring.cpp
@@ -128,17 +128,13 @@ void LLUIString::updateResult() const
 	}
 	mResult = mOrig;
 	
-	// get the defailt args + local args
-	if (!mArgs || mArgs->empty())
+	// get the default args + local args
+	LLStringUtil::format_map_t combined_args = LLTrans::getDefaultArgs();
+	if (mArgs && !mArgs->empty())
 	{
-		LLStringUtil::format(mResult, LLTrans::getDefaultArgs());
-	}
-	else
-	{
-		LLStringUtil::format_map_t combined_args = LLTrans::getDefaultArgs();
 		combined_args.insert(mArgs->begin(), mArgs->end());
-		LLStringUtil::format(mResult, combined_args);
 	}
+	LLStringUtil::format(mResult, combined_args);
 }
 
 void LLUIString::updateWResult() const
diff --git a/indra/llui/llview.cpp b/indra/llui/llview.cpp
index e1ee0a5b14..54843227b7 100644
--- a/indra/llui/llview.cpp
+++ b/indra/llui/llview.cpp
@@ -1106,7 +1106,7 @@ void LLView::drawChildren()
 				{
 					LLUI::pushMatrix();
 					{
-						LLUI::translate((F32)viewp->getRect().mLeft, (F32)viewp->getRect().mBottom, 0.f);
+						LLUI::translate((F32)viewp->getRect().mLeft, (F32)viewp->getRect().mBottom);
 						// flag the fact we are in draw here, in case overridden draw() method attempts to remove this widget
 						viewp->mInDraw = true;
 						viewp->draw();
@@ -1159,7 +1159,7 @@ void LLView::drawDebugRect()
 
 		if (getUseBoundingRect())
 		{
-			LLUI::translate((F32)mBoundingRect.mLeft - (F32)mRect.mLeft, (F32)mBoundingRect.mBottom - (F32)mRect.mBottom, 0.f);
+			LLUI::translate((F32)mBoundingRect.mLeft - (F32)mRect.mLeft, (F32)mBoundingRect.mBottom - (F32)mRect.mBottom);
 		}
 
 		LLRect debug_rect = getUseBoundingRect() ? mBoundingRect : mRect;
@@ -1231,7 +1231,7 @@ void LLView::drawChild(LLView* childp, S32 x_offset, S32 y_offset, BOOL force_dr
 			gGL.matrixMode(LLRender::MM_MODELVIEW);
 			LLUI::pushMatrix();
 			{
-				LLUI::translate((F32)childp->getRect().mLeft + x_offset, (F32)childp->getRect().mBottom + y_offset, 0.f);
+				LLUI::translate((F32)childp->getRect().mLeft + x_offset, (F32)childp->getRect().mBottom + y_offset);
 				childp->draw();
 			}
 			LLUI::popMatrix();
@@ -1300,7 +1300,10 @@ void LLView::reshape(S32 width, S32 height, BOOL called_from_parent)
 			S32 delta_x = child_rect.mLeft - viewp->getRect().mLeft;
 			S32 delta_y = child_rect.mBottom - viewp->getRect().mBottom;
 			viewp->translate( delta_x, delta_y );
-			viewp->reshape(child_rect.getWidth(), child_rect.getHeight());
+			if (child_rect.getWidth() != viewp->getRect().getWidth() || child_rect.getHeight() != viewp->getRect().getHeight())
+			{
+				viewp->reshape(child_rect.getWidth(), child_rect.getHeight());
+			}
 		}
 	}
 
@@ -1616,59 +1619,30 @@ LLView* LLView::findNextSibling(LLView* child)
 }
 
 
-LLCoordGL getNeededTranslation(const LLRect& input, const LLRect& constraint, BOOL allow_partial_outside)
+LLCoordGL getNeededTranslation(const LLRect& input, const LLRect& constraint, S32 min_overlap_pixels)
 {
 	LLCoordGL delta;
 
-	if (allow_partial_outside)
-	{
-		const S32 KEEP_ONSCREEN_PIXELS = 16;
+	const S32 KEEP_ONSCREEN_PIXELS_WIDTH = llmin(min_overlap_pixels, input.getWidth());
+	const S32 KEEP_ONSCREEN_PIXELS_HEIGHT = llmin(min_overlap_pixels, input.getHeight());
 
-		if( input.mRight - KEEP_ONSCREEN_PIXELS < constraint.mLeft )
-		{
-			delta.mX = constraint.mLeft - (input.mRight - KEEP_ONSCREEN_PIXELS);
-		}
-		else
-		if( input.mLeft + KEEP_ONSCREEN_PIXELS > constraint.mRight )
-		{
-			delta.mX = constraint.mRight - (input.mLeft + KEEP_ONSCREEN_PIXELS);
-		}
+	if( input.mRight - KEEP_ONSCREEN_PIXELS_WIDTH < constraint.mLeft )
+	{
+		delta.mX = constraint.mLeft - (input.mRight - KEEP_ONSCREEN_PIXELS_WIDTH);
+	}
+	else if( input.mLeft + KEEP_ONSCREEN_PIXELS_WIDTH > constraint.mRight )
+	{
+		delta.mX = constraint.mRight - (input.mLeft + KEEP_ONSCREEN_PIXELS_WIDTH);
+	}
 
-		if( input.mTop > constraint.mTop )
-		{
-			delta.mY = constraint.mTop - input.mTop;
-		}
-		else
-		if( input.mTop - KEEP_ONSCREEN_PIXELS < constraint.mBottom )
-		{
-			delta.mY = constraint.mBottom - (input.mTop - KEEP_ONSCREEN_PIXELS);
-		}
+	if( input.mTop > constraint.mTop )
+	{
+		delta.mY = constraint.mTop - input.mTop;
 	}
 	else
+	if( input.mTop - KEEP_ONSCREEN_PIXELS_HEIGHT < constraint.mBottom )
 	{
-		if( input.mLeft < constraint.mLeft )
-		{
-			delta.mX = constraint.mLeft - input.mLeft;
-		}
-		else
-		if( input.mRight > constraint.mRight )
-		{
-			delta.mX = constraint.mRight - input.mRight;
-			// compensate for left edge possible going off screen
-			delta.mX += llmax( 0, input.getWidth() - constraint.getWidth() );
-		}
-
-		if( input.mTop > constraint.mTop )
-		{
-			delta.mY = constraint.mTop - input.mTop;
-		}
-		else
-		if( input.mBottom < constraint.mBottom )
-		{
-			delta.mY = constraint.mBottom - input.mBottom;
-			// compensate for top edge possible going off screen
-			delta.mY -= llmax( 0, input.getHeight() - constraint.getHeight() );
-		}
+		delta.mY = constraint.mBottom - (input.mTop - KEEP_ONSCREEN_PIXELS_HEIGHT);
 	}
 
 	return delta;
@@ -1677,9 +1651,9 @@ LLCoordGL getNeededTranslation(const LLRect& input, const LLRect& constraint, BO
 // Moves the view so that it is entirely inside of constraint.
 // If the view will not fit because it's too big, aligns with the top and left.
 // (Why top and left?  That's where the drag bars are for floaters.)
-BOOL LLView::translateIntoRect(const LLRect& constraint, BOOL allow_partial_outside )
+BOOL LLView::translateIntoRect(const LLRect& constraint, S32 min_overlap_pixels)
 {
-	LLCoordGL translation = getNeededTranslation(getRect(), constraint, allow_partial_outside);
+	LLCoordGL translation = getNeededTranslation(getRect(), constraint, min_overlap_pixels);
 
 	if (translation.mX != 0 || translation.mY != 0)
 	{
@@ -1691,9 +1665,9 @@ BOOL LLView::translateIntoRect(const LLRect& constraint, BOOL allow_partial_outs
 
 // move this view into "inside" but not onto "exclude"
 // NOTE: if this view is already contained in "inside", we ignore the "exclude" rect
-BOOL LLView::translateIntoRectWithExclusion( const LLRect& inside, const LLRect& exclude, BOOL allow_partial_outside )
+BOOL LLView::translateIntoRectWithExclusion( const LLRect& inside, const LLRect& exclude, S32 min_overlap_pixels)
 {
-	LLCoordGL translation = getNeededTranslation(getRect(), inside, allow_partial_outside);
+	LLCoordGL translation = getNeededTranslation(getRect(), inside, min_overlap_pixels);
 	
 	if (translation.mX != 0 || translation.mY != 0)
 	{
@@ -1861,7 +1835,10 @@ const LLCtrlQuery & LLView::getFocusRootsQuery()
 
 void	LLView::setShape(const LLRect& new_rect, bool by_user)
 {
-	handleReshape(new_rect, by_user);
+	if (new_rect != getRect())
+	{
+		handleReshape(new_rect, by_user);
+	}
 }
 
 void LLView::handleReshape(const LLRect& new_rect, bool by_user)
@@ -2251,145 +2228,163 @@ static bool get_last_child_rect(LLView* parent, LLRect *rect)
 }
 
 //static
-void LLView::applyXUILayout(LLView::Params& p, LLView* parent)
+void LLView::applyXUILayout(LLView::Params& p, LLView* parent, LLRect layout_rect)
 {
+	if (!parent) return;
+
 	const S32 VPAD = 4;
 	const S32 MIN_WIDGET_HEIGHT = 10;
 	
 	// *NOTE:  This will confuse export of floater/panel coordinates unless
 	// the default is also "topleft".  JC
-	if (p.layout().empty() && parent)
+	if (p.layout().empty())
 	{
 		p.layout = parent->getLayout();
 	}
 
-	if (parent)
+	if (layout_rect.isEmpty())
 	{
-		LLRect parent_rect = parent->getLocalRect();
-		// overwrite uninitialized rect params, using context
-		LLRect default_rect = parent->getLocalRect();
+		layout_rect = parent->getLocalRect();
+	}
 
-		bool layout_topleft = (p.layout() == "topleft");
+	// overwrite uninitialized rect params, using context
+	LLRect default_rect = parent->getLocalRect();
 
-		// convert negative or centered coordinates to parent relative values
-		// Note: some of this logic matches the logic in TypedParam<LLRect>::setValueFromBlock()
-		if (p.rect.left.isProvided() && p.rect.left < 0) p.rect.left = p.rect.left + parent_rect.getWidth();
-		if (p.rect.right.isProvided() && p.rect.right < 0) p.rect.right = p.rect.right + parent_rect.getWidth();
-		if (p.rect.bottom.isProvided() && p.rect.bottom < 0) p.rect.bottom = p.rect.bottom + parent_rect.getHeight();
-		if (p.rect.top.isProvided() && p.rect.top < 0) p.rect.top = p.rect.top + parent_rect.getHeight();
+	bool layout_topleft = (p.layout() == "topleft");
 
+	// convert negative or centered coordinates to parent relative values
+	// Note: some of this logic matches the logic in TypedParam<LLRect>::setValueFromBlock()
+	if (p.rect.left.isProvided()) 
+	{
+		p.rect.left = p.rect.left + ((p.rect.left >= 0) ? layout_rect.mLeft : layout_rect.mRight);
+	}
+	if (p.rect.right.isProvided())
+	{
+		p.rect.right = p.rect.right + ((p.rect.right >= 0) ? layout_rect.mLeft : layout_rect.mRight);
+	}
+	if (p.rect.bottom.isProvided()) 
+	{
+		p.rect.bottom = p.rect.bottom + ((p.rect.bottom >= 0) ? layout_rect.mBottom : layout_rect.mTop);
 		if (layout_topleft)
 		{
 			//invert top to bottom
-			if (p.rect.top.isProvided()) p.rect.top = parent_rect.getHeight() - p.rect.top;
-			if (p.rect.bottom.isProvided()) p.rect.bottom = parent_rect.getHeight() - p.rect.bottom;
+			p.rect.bottom = layout_rect.mBottom + layout_rect.mTop - p.rect.bottom;
 		}
-
-		// DEPRECATE: automatically fall back to height of MIN_WIDGET_HEIGHT pixels
-		if (!p.rect.height.isProvided() && !p.rect.top.isProvided() && p.rect.height == 0)
+	}
+	if (p.rect.top.isProvided())
+	{
+		p.rect.top = p.rect.top + ((p.rect.top >= 0) ? layout_rect.mBottom : layout_rect.mTop);
+		if (layout_topleft)
 		{
-			p.rect.height = MIN_WIDGET_HEIGHT;
+			//invert top to bottom
+			p.rect.top = layout_rect.mBottom + layout_rect.mTop - p.rect.top;
 		}
+	}
+
+	// DEPRECATE: automatically fall back to height of MIN_WIDGET_HEIGHT pixels
+	if (!p.rect.height.isProvided() && !p.rect.top.isProvided() && p.rect.height == 0)
+	{
+		p.rect.height = MIN_WIDGET_HEIGHT;
+	}
 
-		default_rect.translate(0, default_rect.getHeight());
+	default_rect.translate(0, default_rect.getHeight());
 
-		// If there was a recently constructed child, use its rectangle
-		get_last_child_rect(parent, &default_rect);
+	// If there was a recently constructed child, use its rectangle
+	get_last_child_rect(parent, &default_rect);
 
-		if (layout_topleft)
+	if (layout_topleft)
+	{
+		// Invert the sense of bottom_delta for topleft layout
+		if (p.bottom_delta.isProvided())
 		{
-			// Invert the sense of bottom_delta for topleft layout
-			if (p.bottom_delta.isProvided())
-			{
-				p.bottom_delta = -p.bottom_delta;
-			}
-			else if (p.top_pad.isProvided()) 
-			{
-				p.bottom_delta = -(p.rect.height + p.top_pad);
-			}
-			else if (p.top_delta.isProvided())
-			{
-				p.bottom_delta =
-					-(p.top_delta + p.rect.height - default_rect.getHeight());
-			}
-			else if (!p.left_delta.isProvided()
-					 && !p.left_pad.isProvided())
-			{
-				// set default position is just below last rect
-				p.bottom_delta.set(-(p.rect.height + VPAD), false);
-			}
-			else
-			{
-				p.bottom_delta.set(0, false);
-			}
-	
-			// default to same left edge
-			if (!p.left_delta.isProvided())
-			{
-				p.left_delta.set(0, false);
-			}
-			if (p.left_pad.isProvided())
-			{
-				// left_pad is based on prior widget's right edge
-				p.left_delta.set(p.left_pad + default_rect.getWidth(), false);
-			}
-			
-			default_rect.translate(p.left_delta, p.bottom_delta);				
+			p.bottom_delta = -p.bottom_delta;
 		}
-		else
-		{	
-			// set default position is just below last rect
-			if (!p.bottom_delta.isProvided())
-			{
-				p.bottom_delta.set(-(p.rect.height + VPAD), false);
-			}
-			if (!p.left_delta.isProvided())
-			{
-				p.left_delta.set(0, false);
-			}
-			default_rect.translate(p.left_delta, p.bottom_delta);
+		else if (p.top_pad.isProvided()) 
+		{
+			p.bottom_delta = -(p.rect.height + p.top_pad);
 		}
-
-		// this handles case where *both* x and x_delta are provided
-		// ignore x in favor of default x + x_delta
-		if (p.bottom_delta.isProvided()) p.rect.bottom.set(0, false);
-		if (p.left_delta.isProvided()) p.rect.left.set(0, false);
-
-		// selectively apply rectangle defaults, making sure that
-		// params are not flagged as having been "provided"
-		// as rect params are overconstrained and rely on provided flags
-		if (!p.rect.left.isProvided())
+		else if (p.top_delta.isProvided())
 		{
-			p.rect.left.set(default_rect.mLeft, false);
-			//HACK: get around the fact that setting a rect param component value won't invalidate the existing rect object value
-			p.rect.paramChanged(p.rect.left, true);
+			p.bottom_delta =
+				-(p.top_delta + p.rect.height - default_rect.getHeight());
 		}
-		if (!p.rect.bottom.isProvided())
+		else if (!p.left_delta.isProvided()
+					&& !p.left_pad.isProvided())
 		{
-			p.rect.bottom.set(default_rect.mBottom, false);
-			p.rect.paramChanged(p.rect.bottom, true);
+			// set default position is just below last rect
+			p.bottom_delta.set(-(p.rect.height + VPAD), false);
 		}
-		if (!p.rect.top.isProvided())
+		else
 		{
-			p.rect.top.set(default_rect.mTop, false);
-			p.rect.paramChanged(p.rect.top, true);
+			p.bottom_delta.set(0, false);
 		}
-		if (!p.rect.right.isProvided())
+	
+		// default to same left edge
+		if (!p.left_delta.isProvided())
 		{
-			p.rect.right.set(default_rect.mRight, false);
-			p.rect.paramChanged(p.rect.right, true);
-
+			p.left_delta.set(0, false);
 		}
-		if (!p.rect.width.isProvided())
+		if (p.left_pad.isProvided())
 		{
-			p.rect.width.set(default_rect.getWidth(), false);
-			p.rect.paramChanged(p.rect.width, true);
+			// left_pad is based on prior widget's right edge
+			p.left_delta.set(p.left_pad + default_rect.getWidth(), false);
 		}
-		if (!p.rect.height.isProvided())
+			
+		default_rect.translate(p.left_delta, p.bottom_delta);				
+	}
+	else
+	{	
+		// set default position is just below last rect
+		if (!p.bottom_delta.isProvided())
+		{
+			p.bottom_delta.set(-(p.rect.height + VPAD), false);
+		}
+		if (!p.left_delta.isProvided())
 		{
-			p.rect.height.set(default_rect.getHeight(), false);
-			p.rect.paramChanged(p.rect.height, true);
+			p.left_delta.set(0, false);
 		}
+		default_rect.translate(p.left_delta, p.bottom_delta);
+	}
+
+	// this handles case where *both* x and x_delta are provided
+	// ignore x in favor of default x + x_delta
+	if (p.bottom_delta.isProvided()) p.rect.bottom.set(0, false);
+	if (p.left_delta.isProvided()) p.rect.left.set(0, false);
+
+	// selectively apply rectangle defaults, making sure that
+	// params are not flagged as having been "provided"
+	// as rect params are overconstrained and rely on provided flags
+	if (!p.rect.left.isProvided())
+	{
+		p.rect.left.set(default_rect.mLeft, false);
+		//HACK: get around the fact that setting a rect param component value won't invalidate the existing rect object value
+		p.rect.paramChanged(p.rect.left, true);
+	}
+	if (!p.rect.bottom.isProvided())
+	{
+		p.rect.bottom.set(default_rect.mBottom, false);
+		p.rect.paramChanged(p.rect.bottom, true);
+	}
+	if (!p.rect.top.isProvided())
+	{
+		p.rect.top.set(default_rect.mTop, false);
+		p.rect.paramChanged(p.rect.top, true);
+	}
+	if (!p.rect.right.isProvided())
+	{
+		p.rect.right.set(default_rect.mRight, false);
+		p.rect.paramChanged(p.rect.right, true);
+
+	}
+	if (!p.rect.width.isProvided())
+	{
+		p.rect.width.set(default_rect.getWidth(), false);
+		p.rect.paramChanged(p.rect.width, true);
+	}
+	if (!p.rect.height.isProvided())
+	{
+		p.rect.height.set(default_rect.getHeight(), false);
+		p.rect.paramChanged(p.rect.height, true);
 	}
 }
 
diff --git a/indra/llui/llview.h b/indra/llui/llview.h
index f1fac5f69c..1c35349510 100644
--- a/indra/llui/llview.h
+++ b/indra/llui/llview.h
@@ -370,8 +370,8 @@ public:
 	virtual void	reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
 	virtual void	translate( S32 x, S32 y );
 	void			setOrigin( S32 x, S32 y )	{ mRect.translate( x - mRect.mLeft, y - mRect.mBottom ); }
-	BOOL			translateIntoRect( const LLRect& constraint, BOOL allow_partial_outside );
-	BOOL			translateIntoRectWithExclusion( const LLRect& inside, const LLRect& exclude, BOOL allow_partial_outside );
+	BOOL			translateIntoRect( const LLRect& constraint, S32 min_overlap_pixels = S32_MAX);
+	BOOL			translateIntoRectWithExclusion( const LLRect& inside, const LLRect& exclude, S32 min_overlap_pixels = S32_MAX);
 	void			centerWithin(const LLRect& bounds);
 
 	void	setShape(const LLRect& new_rect, bool by_user = false);
@@ -505,7 +505,7 @@ public:
 
 	// Set up params after XML load before calling new(),
 	// usually to adjust layout.
-	static void applyXUILayout(Params& p, LLView* parent);
+	static void applyXUILayout(Params& p, LLView* parent, LLRect layout_rect = LLRect());
 
 	// For re-export of floaters and panels, convert the coordinate system
 	// to be top-left based.