17 files changed, 198 insertions, 291 deletions

diff --git a/indra/llui/llcombobox.cpp b/indra/llui/llcombobox.cpp
index 806d2ef3f6..41e5d74042 100644
--- a/indra/llui/llcombobox.cpp
+++ b/indra/llui/llcombobox.cpp
@@ -563,8 +563,7 @@ void LLComboBox::showList()
 	S32 min_width = getRect().getWidth();
 	S32 max_width = llmax(min_width, MAX_COMBO_WIDTH);
 	// make sure we have up to date content width metrics
-	mList->calcColumnWidths();
-	S32 list_width = llclamp(mList->getMaxContentWidth(), min_width, max_width);
+	S32 list_width = llclamp(mList->calcMaxContentWidth(), min_width, max_width);
 
 	if (mListPosition == BELOW)
 	{
diff --git a/indra/llui/llfloater.cpp b/indra/llui/llfloater.cpp
index 90251ac7c6..054b9173d3 100644
--- a/indra/llui/llfloater.cpp
+++ b/indra/llui/llfloater.cpp
@@ -3233,24 +3233,14 @@ bool LLFloater::isVisible(const LLFloater* floater)
 
 static LLFastTimer::DeclareTimer FTM_BUILD_FLOATERS("Build Floaters");
 
-bool LLFloater::buildFromFile(const std::string& filename, LLXMLNodePtr output_node)
+bool LLFloater::buildFromFile(const std::string& filename)
 {
 	LLFastTimer timer(FTM_BUILD_FLOATERS);
 	LLXMLNodePtr root;
 
-	//if exporting, only load the language being exported, 
-	//instead of layering localized version on top of english
-	if (output_node)
-	{
-		if (!LLUICtrlFactory::getLocalizedXMLNode(filename, root))
-		{
-			llwarns << "Couldn't parse floater from: " << LLUI::getLocalizedSkinPath() + gDirUtilp->getDirDelimiter() + filename << llendl;
-			return false;
-		}
-	}
-	else if (!LLUICtrlFactory::getLayeredXMLNode(filename, root))
+	if (!LLUICtrlFactory::getLayeredXMLNode(filename, root))
 	{
-		llwarns << "Couldn't parse floater from: " << LLUI::getSkinPath() + gDirUtilp->getDirDelimiter() + filename << llendl;
+		llwarns << "Couldn't find (or parse) floater from: " << filename << llendl;
 		return false;
 	}
 	
@@ -3275,7 +3265,7 @@ bool LLFloater::buildFromFile(const std::string& filename, LLXMLNodePtr output_n
 		getCommitCallbackRegistrar().pushScope();
 		getEnableCallbackRegistrar().pushScope();
 		
-		res = initFloaterXML(root, getParent(), filename, output_node);
+		res = initFloaterXML(root, getParent(), filename, NULL);
 
 		setXMLFilename(filename);
 		
diff --git a/indra/llui/llfloater.h b/indra/llui/llfloater.h
index 64d6dcea04..e64b6d04d3 100644
--- a/indra/llui/llfloater.h
+++ b/indra/llui/llfloater.h
@@ -202,7 +202,7 @@ public:
 
 	// Don't export top/left for rect, only height/width
 	static void setupParamsForExport(Params& p, LLView* parent);
-	bool buildFromFile(const std::string &filename, LLXMLNodePtr output_node = NULL);
+	bool buildFromFile(const std::string &filename);
 
 	boost::signals2::connection setMinimizeCallback( const commit_signal_t::slot_type& cb );
 	boost::signals2::connection setOpenCallback( const commit_signal_t::slot_type& cb );
diff --git a/indra/llui/llfloaterreg.cpp b/indra/llui/llfloaterreg.cpp
index 9115eb7174..306caf2b91 100644
--- a/indra/llui/llfloaterreg.cpp
+++ b/indra/llui/llfloaterreg.cpp
@@ -154,7 +154,7 @@ LLFloater* LLFloaterReg::getInstance(const std::string& name, const LLSD& key)
 					llwarns << "Failed to build floater type: '" << name << "'." << llendl;
 					return NULL;
 				}
-				bool success = res->buildFromFile(xui_file, NULL);
+				bool success = res->buildFromFile(xui_file);
 				if (!success)
 				{
 					llwarns << "Failed to build floater type: '" << name << "'." << llendl;
diff --git a/indra/llui/llnotifications.cpp b/indra/llui/llnotifications.cpp
index 629eef2c3b..210a320f41 100644
--- a/indra/llui/llnotifications.cpp
+++ b/indra/llui/llnotifications.cpp
@@ -1424,25 +1424,19 @@ 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";
-	std::string localized_skin_relative_path = gDirUtilp->getDirDelimiter() + LLUI::getLocalizedSkinPath() + gDirUtilp->getDirDelimiter() + "notifications.xml";
-
-	addPathIfExists(gDirUtilp->getDefaultSkinDir() + skin_relative_path, search_paths);
-	addPathIfExists(gDirUtilp->getDefaultSkinDir() + localized_skin_relative_path, search_paths);
-	addPathIfExists(gDirUtilp->getSkinDir() + skin_relative_path, search_paths);
-	addPathIfExists(gDirUtilp->getSkinDir() + localized_skin_relative_path, search_paths);
-	addPathIfExists(gDirUtilp->getUserSkinDir() + skin_relative_path, search_paths);
-	addPathIfExists(gDirUtilp->getUserSkinDir() + localized_skin_relative_path, search_paths);
+	// Passing findSkinnedFilenames(constraint=LLDir::ALL_SKINS) makes it
+	// output all relevant pathnames instead of just the ones from the most
+	// specific skin.
+	std::vector<std::string> search_paths =
+		gDirUtilp->findSkinnedFilenames(LLDir::XUI, "notifications.xml", LLDir::ALL_SKINS);
 
 	std::string base_filename = search_paths.front();
 	LLXMLNodePtr root;
 	BOOL success  = LLXMLNode::getLayeredXMLNode(root, search_paths);
-	
+
 	if (!success || root.isNull() || !root->hasName( "notifications" ))
 	{
-		llerrs << "Problem reading UI Notifications file: " << base_filename << llendl;
+		llerrs << "Problem reading XML from UI Notifications file: " << base_filename << llendl;
 		return false;
 	}
 
@@ -1452,7 +1446,7 @@ bool LLNotifications::loadTemplates()
 
 	if(!params.validateBlock())
 	{
-		llerrs << "Problem reading UI Notifications file: " << base_filename << llendl;
+		llerrs << "Problem reading XUI from UI Notifications file: " << base_filename << llendl;
 		return false;
 	}
 
@@ -1508,7 +1502,9 @@ bool LLNotifications::loadTemplates()
 bool LLNotifications::loadVisibilityRules()
 {
 	const std::string xml_filename = "notification_visibility.xml";
-	std::string full_filename = gDirUtilp->findSkinnedFilename(LLUI::getXUIPaths().front(), xml_filename);
+	// Note that here we're looking for the "en" version, the default
+	// language, rather than the most localized version of this file.
+	std::string full_filename = gDirUtilp->findSkinnedFilenameBaseLang(LLDir::XUI, xml_filename);
 
 	LLNotificationVisibilityRule::Rules params;
 	LLSimpleXUIParser parser;
diff --git a/indra/llui/llpanel.cpp b/indra/llui/llpanel.cpp
index 00318cec6b..67472ad166 100644
--- a/indra/llui/llpanel.cpp
+++ b/indra/llui/llpanel.cpp
@@ -968,25 +968,15 @@ static LLFastTimer::DeclareTimer FTM_BUILD_PANELS("Build Panels");
 //-----------------------------------------------------------------------------
 // buildPanel()
 //-----------------------------------------------------------------------------
-BOOL LLPanel::buildFromFile(const std::string& filename, LLXMLNodePtr output_node, const LLPanel::Params& default_params)
+BOOL LLPanel::buildFromFile(const std::string& filename, const LLPanel::Params& default_params)
 {
 	LLFastTimer timer(FTM_BUILD_PANELS);
 	BOOL didPost = FALSE;
 	LLXMLNodePtr root;
 
-	//if exporting, only load the language being exported, 
-	//instead of layering localized version on top of english
-	if (output_node)
-	{	
-		if (!LLUICtrlFactory::getLocalizedXMLNode(filename, root))
-		{
-			llwarns << "Couldn't parse panel from: " << LLUI::getLocalizedSkinPath() + gDirUtilp->getDirDelimiter() + filename  << llendl;
-			return didPost;
-		}
-	}
-	else if (!LLUICtrlFactory::getLayeredXMLNode(filename, root))
+	if (!LLUICtrlFactory::getLayeredXMLNode(filename, root))
 	{
-		llwarns << "Couldn't parse panel from: " << LLUI::getSkinPath() + gDirUtilp->getDirDelimiter() + filename << llendl;
+		llwarns << "Couldn't parse panel from: " << filename << llendl;
 		return didPost;
 	}
 
@@ -1010,7 +1000,7 @@ BOOL LLPanel::buildFromFile(const std::string& filename, LLXMLNodePtr output_nod
 		getCommitCallbackRegistrar().pushScope();
 		getEnableCallbackRegistrar().pushScope();
 		
-		didPost = initPanelXML(root, NULL, output_node, default_params);
+		didPost = initPanelXML(root, NULL, NULL, default_params);
 
 		getCommitCallbackRegistrar().popScope();
 		getEnableCallbackRegistrar().popScope();
diff --git a/indra/llui/llpanel.h b/indra/llui/llpanel.h
index f620201020..e63b41f97c 100644
--- a/indra/llui/llpanel.h
+++ b/indra/llui/llpanel.h
@@ -105,7 +105,7 @@ protected:
 	LLPanel(const LLPanel::Params& params = getDefaultParams());
 	
 public:
-	BOOL buildFromFile(const std::string &filename, LLXMLNodePtr output_node = NULL, const LLPanel::Params&default_params = getDefaultParams());
+	BOOL buildFromFile(const std::string &filename, const LLPanel::Params& default_params = getDefaultParams());
 
 	static LLPanel* createFactoryPanel(const std::string& name);
 
diff --git a/indra/llui/llscrolllistcolumn.cpp b/indra/llui/llscrolllistcolumn.cpp
index 07a6dfaa10..af124d9826 100644
--- a/indra/llui/llscrolllistcolumn.cpp
+++ b/indra/llui/llscrolllistcolumn.cpp
@@ -98,6 +98,7 @@ BOOL LLScrollColumnHeader::handleDoubleClick(S32 x, S32 y, MASK mask)
 	if (canResize() && mResizeBar->getRect().pointInRect(x, y))
 	{
 		// reshape column to max content width
+		mColumn->mParentCtrl->calcMaxContentWidth();
 		LLRect column_rect = getRect();
 		column_rect.mRight = column_rect.mLeft + mColumn->mMaxContentWidth;
 		setShape(column_rect, true);
@@ -127,6 +128,8 @@ LLView*	LLScrollColumnHeader::findSnapEdge(S32& new_edge_val, const LLCoordGL& m
 
 	LLRect snap_rect = getSnapRect();
 
+	mColumn->mParentCtrl->calcMaxContentWidth();
+
 	S32 snap_delta = mColumn->mMaxContentWidth - snap_rect.getWidth();
 
 	// x coord growing means column growing, so same signs mean we're going in right direction
diff --git a/indra/llui/llscrolllistctrl.cpp b/indra/llui/llscrolllistctrl.cpp
index b3499693dd..3e0653e9a4 100644
--- a/indra/llui/llscrolllistctrl.cpp
+++ b/indra/llui/llscrolllistctrl.cpp
@@ -35,6 +35,7 @@
 #include "llboost.h"
 //#include "indra_constants.h"
 
+#include "llavatarnamecache.h"
 #include "llcheckboxctrl.h"
 #include "llclipboard.h"
 #include "llfocusmgr.h"
@@ -158,15 +159,14 @@ LLScrollListCtrl::LLScrollListCtrl(const LLScrollListCtrl::Params& p)
 	mMouseWheelOpaque(p.mouse_wheel_opaque),
 	mPageLines(p.page_lines),
 	mMaxSelectable(0),
-	mAllowKeyboardMovement(TRUE),
+	mAllowKeyboardMovement(true),
 	mCommitOnKeyboardMovement(p.commit_on_keyboard_movement),
-	mCommitOnSelectionChange(FALSE),
-	mSelectionChanged(FALSE),
-	mNeedsScroll(FALSE),
-	mCanSelect(TRUE),
-	mColumnsDirty(FALSE),
+	mCommitOnSelectionChange(false),
+	mSelectionChanged(false),
+	mNeedsScroll(false),
+	mCanSelect(true),
+	mColumnsDirty(false),
 	mMaxItemCount(INT_MAX), 
-	mMaxContentWidth(0),
 	mBorderThickness( 2 ),
 	mOnDoubleClickCallback( NULL ),
 	mOnMaximumSelectCallback( NULL ),
@@ -180,7 +180,7 @@ LLScrollListCtrl::LLScrollListCtrl(const LLScrollListCtrl::Params& p)
 	mTotalStaticColumnWidth(0),
 	mTotalColumnPadding(0),
 	mSorted(false),
-	mDirty(FALSE),
+	mDirty(false),
 	mOriginalSelection(-1),
 	mLastSelected(NULL),
 	mHeadingHeight(p.heading_height),
@@ -356,7 +356,7 @@ void LLScrollListCtrl::clearRows()
 	mScrollLines = 0;
 	mLastSelected = NULL;
 	updateLayout();
-	mDirty = FALSE; 
+	mDirty = false; 
 }
 
 
@@ -591,13 +591,11 @@ BOOL LLScrollListCtrl::addItem( LLScrollListItem* item, EAddPosition pos, BOOL r
 // NOTE: This is *very* expensive for large lists, especially when we are dirtying the list every frame
 //  while receiving a long list of names.
 // *TODO: Use bookkeeping to make this an incramental cost with item additions
-void LLScrollListCtrl::calcColumnWidths()
+S32 LLScrollListCtrl::calcMaxContentWidth()
 {
 	const S32 HEADING_TEXT_PADDING = 25;
 	const S32 COLUMN_TEXT_PADDING = 10;
 
-	mMaxContentWidth = 0;
-
 	S32 max_item_width = 0;
 
 	ordered_columns_t::iterator column_itor;
@@ -606,6 +604,35 @@ void LLScrollListCtrl::calcColumnWidths()
 		LLScrollListColumn* column = *column_itor;
 		if (!column) continue;
 
+		if (mColumnWidthsDirty)
+		{
+			mColumnWidthsDirty = false;
+			// update max content width for this column, by looking at all items
+			column->mMaxContentWidth = column->mHeader ? LLFontGL::getFontSansSerifSmall()->getWidth(column->mLabel) + mColumnPadding + HEADING_TEXT_PADDING : 0;
+			item_list::iterator iter;
+			for (iter = mItemList.begin(); iter != mItemList.end(); iter++)
+			{
+				LLScrollListCell* cellp = (*iter)->getColumn(column->mIndex);
+				if (!cellp) continue;
+
+				column->mMaxContentWidth = llmax(LLFontGL::getFontSansSerifSmall()->getWidth(cellp->getValue().asString()) + mColumnPadding + COLUMN_TEXT_PADDING, column->mMaxContentWidth);
+			}
+		}
+		max_item_width += column->mMaxContentWidth;
+	}
+
+	return max_item_width;
+}
+
+bool LLScrollListCtrl::updateColumnWidths()
+{
+	bool width_changed = false;
+	ordered_columns_t::iterator column_itor;
+	for (column_itor = mColumnsIndexed.begin(); column_itor != mColumnsIndexed.end(); ++column_itor)
+	{
+		LLScrollListColumn* column = *column_itor;
+		if (!column) continue;
+
 		// update column width
 		S32 new_width = column->getWidth();
 		if (column->mRelWidth >= 0)
@@ -617,23 +644,13 @@ void LLScrollListCtrl::calcColumnWidths()
 			new_width = (mItemListRect.getWidth() - mTotalStaticColumnWidth - mTotalColumnPadding) / mNumDynamicWidthColumns;
 		}
 
-		column->setWidth(new_width);
-
-		// update max content width for this column, by looking at all items
-		column->mMaxContentWidth = column->mHeader ? LLFontGL::getFontSansSerifSmall()->getWidth(column->mLabel) + mColumnPadding + HEADING_TEXT_PADDING : 0;
-		item_list::iterator iter;
-		for (iter = mItemList.begin(); iter != mItemList.end(); iter++)
+		if (column->getWidth() != new_width)
 		{
-			LLScrollListCell* cellp = (*iter)->getColumn(column->mIndex);
-			if (!cellp) continue;
-
-			column->mMaxContentWidth = llmax(LLFontGL::getFontSansSerifSmall()->getWidth(cellp->getValue().asString()) + mColumnPadding + COLUMN_TEXT_PADDING, column->mMaxContentWidth);
+			column->setWidth(new_width);
+			width_changed = true;
 		}
-
-		max_item_width += column->mMaxContentWidth;
 	}
-
-	mMaxContentWidth = max_item_width;
+	return width_changed;
 }
 
 const S32 SCROLL_LIST_ROW_PAD = 2;
@@ -669,7 +686,12 @@ void LLScrollListCtrl::updateLineHeightInsert(LLScrollListItem* itemp)
 
 void LLScrollListCtrl::updateColumns()
 {
-	calcColumnWidths();
+	if (!mColumnsDirty)
+		return;
+
+	mColumnsDirty = false;
+
+	bool columns_changed_width = updateColumnWidths();
 
 	// update column headers
 	std::vector<LLScrollListColumn*>::iterator column_ordered_it;
@@ -718,20 +740,22 @@ void LLScrollListCtrl::updateColumns()
 	}
 
 	// propagate column widths to individual cells
-	item_list::iterator iter;
-	for (iter = mItemList.begin(); iter != mItemList.end(); iter++)
+	if (columns_changed_width)
 	{
-		LLScrollListItem *itemp = *iter;
-		S32 num_cols = itemp->getNumColumns();
-		S32 i = 0;
-		for (LLScrollListCell* cell = itemp->getColumn(i); i < num_cols; cell = itemp->getColumn(++i))
+		item_list::iterator iter;
+		for (iter = mItemList.begin(); iter != mItemList.end(); iter++)
 		{
-			if (i >= (S32)mColumnsIndexed.size()) break;
+			LLScrollListItem *itemp = *iter;
+			S32 num_cols = itemp->getNumColumns();
+			S32 i = 0;
+			for (LLScrollListCell* cell = itemp->getColumn(i); i < num_cols; cell = itemp->getColumn(++i))
+			{
+				if (i >= (S32)mColumnsIndexed.size()) break;
 
-			cell->setWidth(mColumnsIndexed[i]->getWidth());
+				cell->setWidth(mColumnsIndexed[i]->getWidth());
+			}
 		}
 	}
-
 }
 
 void LLScrollListCtrl::setHeadingHeight(S32 heading_height)
@@ -772,7 +796,7 @@ BOOL LLScrollListCtrl::selectFirstItem()
 		{
 			deselectItem(itemp);
 		}
-		first_item = FALSE;
+		first_item = false;
 	}
 	if (mCommitOnSelectionChange)
 	{
@@ -1406,17 +1430,23 @@ void LLScrollListCtrl::drawItems()
 
 		S32 cur_y = y;
 		
-		S32 line = 0;
 		S32 max_columns = 0;
 
 		LLColor4 highlight_color = LLColor4::white;
 		static LLUICachedControl<F32> type_ahead_timeout ("TypeAheadTimeout", 0);
 		highlight_color.mV[VALPHA] = clamp_rescale(mSearchTimer.getElapsedTimeF32(), type_ahead_timeout * 0.7f, type_ahead_timeout, 0.4f, 0.f);
 
+		S32 first_line = mScrollLines;
+		S32 last_line = llmin((S32)mItemList.size() - 1, mScrollLines + getLinesPerPage());
+
+		if (first_line >= mItemList.size())
+		{
+			return;
+		}
 		item_list::iterator iter;
-		for (iter = mItemList.begin(); iter != mItemList.end(); iter++)
+		for (S32 line = first_line; line <= last_line; line++)
 		{
-			LLScrollListItem* item = *iter;
+			LLScrollListItem* item = mItemList[line];
 			
 			item_rect.setOriginAndSize( 
 				x, 
@@ -1480,7 +1510,6 @@ void LLScrollListCtrl::drawItems()
 
 				cur_y -= mLineHeight;
 			}
-			line++;
 		}
 	}
 }
@@ -1496,7 +1525,7 @@ void LLScrollListCtrl::draw()
 	if (mNeedsScroll)
 	{
 		scrollToShowSelected();
-		mNeedsScroll = FALSE;
+		mNeedsScroll = false;
 	}
 	LLRect background(0, getRect().getHeight(), getRect().getWidth(), 0);
 	// Draw background
@@ -1507,11 +1536,7 @@ void LLScrollListCtrl::draw()
 		gl_rect_2d(background, getEnabled() ? mBgWriteableColor.get() % alpha : mBgReadOnlyColor.get() % alpha );
 	}
 
-	if (mColumnsDirty)
-	{
-		updateColumns();
-		mColumnsDirty = FALSE;
-	}
+	updateColumns();
 
 	getChildView("comment_text")->setVisible(mItemList.empty());
 
@@ -1719,7 +1744,7 @@ BOOL LLScrollListCtrl::handleMouseDown(S32 x, S32 y, MASK mask)
 		setFocus(TRUE);
 
 		// clear selection changed flag because user is starting a selection operation
-		mSelectionChanged = FALSE;
+		mSelectionChanged = false;
 
 		handleClick(x, y, mask);
 	}
@@ -1737,15 +1762,15 @@ BOOL LLScrollListCtrl::handleMouseUp(S32 x, S32 y, MASK mask)
 		if(mask == MASK_NONE)
 		{
 			selectItemAt(x, y, mask);
-			mNeedsScroll = TRUE;
+			mNeedsScroll = true;
 		}
 	}
 
 	// always commit when mouse operation is completed inside list
 	if (mItemListRect.pointInRect(x,y))
 	{
-		mDirty |= mSelectionChanged;
-		mSelectionChanged = FALSE;
+		mDirty = mDirty || mSelectionChanged;
+		mSelectionChanged = false;
 		onCommit();
 	}
 
@@ -1805,7 +1830,9 @@ void LLScrollListCtrl::copyNameToClipboard(std::string id, bool is_group)
 	}
 	else
 	{
-		gCacheName->getFullName(LLUUID(id), name);
+		LLAvatarName av_name;
+		LLAvatarNameCache::get(LLUUID(id), &av_name);
+		name = av_name.getLegacyName();
 	}
 	LLUrlAction::copyURLToClipboard(name);
 }
@@ -1859,7 +1886,7 @@ BOOL LLScrollListCtrl::handleClick(S32 x, S32 y, MASK mask)
 		{
 			selectItemAt(x, y, mask);
 			gFocusMgr.setMouseCapture(this);
-			mNeedsScroll = TRUE;
+			mNeedsScroll = true;
 		}
 		
 		// propagate state of cell to rest of selected column
@@ -1888,7 +1915,7 @@ BOOL LLScrollListCtrl::handleClick(S32 x, S32 y, MASK mask)
 		// treat this as a normal single item selection
 		selectItemAt(x, y, mask);
 		gFocusMgr.setMouseCapture(this);
-		mNeedsScroll = TRUE;
+		mNeedsScroll = true;
 		// do not eat click (allow double click callback)
 		return FALSE;
 	}
@@ -1994,7 +2021,7 @@ BOOL LLScrollListCtrl::handleHover(S32 x,S32 y,MASK mask)
 		if(mask == MASK_NONE)
 		{
 			selectItemAt(x, y, mask);
-			mNeedsScroll = TRUE;
+			mNeedsScroll = true;
 		}
 	}
 	else 
@@ -2041,7 +2068,7 @@ BOOL LLScrollListCtrl::handleKeyHere(KEY key,MASK mask )
 				{
 					// commit implicit in call
 					selectPrevItem(FALSE);
-					mNeedsScroll = TRUE;
+					mNeedsScroll = true;
 					handled = TRUE;
 				}
 				break;
@@ -2050,7 +2077,7 @@ BOOL LLScrollListCtrl::handleKeyHere(KEY key,MASK mask )
 				{
 					// commit implicit in call
 					selectNextItem(FALSE);
-					mNeedsScroll = TRUE;
+					mNeedsScroll = true;
 					handled = TRUE;
 				}
 				break;
@@ -2058,7 +2085,7 @@ BOOL LLScrollListCtrl::handleKeyHere(KEY key,MASK mask )
 				if (mAllowKeyboardMovement || hasFocus())
 				{
 					selectNthItem(getFirstSelectedIndex() - (mScrollbar->getPageSize() - 1));
-					mNeedsScroll = TRUE;
+					mNeedsScroll = true;
 					if (mCommitOnKeyboardMovement
 						&& !mCommitOnSelectionChange) 
 					{
@@ -2071,7 +2098,7 @@ BOOL LLScrollListCtrl::handleKeyHere(KEY key,MASK mask )
 				if (mAllowKeyboardMovement || hasFocus())
 				{
 					selectNthItem(getFirstSelectedIndex() + (mScrollbar->getPageSize() - 1));
-					mNeedsScroll = TRUE;
+					mNeedsScroll = true;
 					if (mCommitOnKeyboardMovement
 						&& !mCommitOnSelectionChange) 
 					{
@@ -2084,7 +2111,7 @@ BOOL LLScrollListCtrl::handleKeyHere(KEY key,MASK mask )
 				if (mAllowKeyboardMovement || hasFocus())
 				{
 					selectFirstItem();
-					mNeedsScroll = TRUE;
+					mNeedsScroll = true;
 					if (mCommitOnKeyboardMovement
 						&& !mCommitOnSelectionChange) 
 					{
@@ -2097,7 +2124,7 @@ BOOL LLScrollListCtrl::handleKeyHere(KEY key,MASK mask )
 				if (mAllowKeyboardMovement || hasFocus())
 				{
 					selectNthItem(getItemCount() - 1);
-					mNeedsScroll = TRUE;
+					mNeedsScroll = true;
 					if (mCommitOnKeyboardMovement
 						&& !mCommitOnSelectionChange) 
 					{
@@ -2136,7 +2163,7 @@ BOOL LLScrollListCtrl::handleKeyHere(KEY key,MASK mask )
 				}
 				else if (selectItemByPrefix(wstring_to_utf8str(mSearchString), FALSE))
 				{
-					mNeedsScroll = TRUE;
+					mNeedsScroll = true;
 					// update search string only on successful match
 					mSearchTimer.reset();
 
@@ -2177,7 +2204,7 @@ BOOL LLScrollListCtrl::handleUnicodeCharHere(llwchar uni_char)
 	if (selectItemByPrefix(wstring_to_utf8str(mSearchString + (llwchar)uni_char), FALSE))
 	{
 		// update search string only on successful match
-		mNeedsScroll = TRUE;
+		mNeedsScroll = true;
 		mSearchString += uni_char;
 		mSearchTimer.reset();
 
@@ -2223,7 +2250,7 @@ BOOL LLScrollListCtrl::handleUnicodeCharHere(llwchar uni_char)
 				if (item->getEnabled() && LLStringOps::toLower(item_label[0]) == uni_char)
 				{
 					selectItem(item);
-					mNeedsScroll = TRUE;
+					mNeedsScroll = true;
 					cellp->highlightText(0, 1);
 					mSearchTimer.reset();
 
@@ -2294,7 +2321,7 @@ void LLScrollListCtrl::selectItem(LLScrollListItem* itemp, BOOL select_single_it
 		}
 		itemp->setSelected(TRUE);
 		mLastSelected = itemp;
-		mSelectionChanged = TRUE;
+		mSelectionChanged = true;
 	}
 }
 
@@ -2315,7 +2342,7 @@ void LLScrollListCtrl::deselectItem(LLScrollListItem* itemp)
 		{
 			cellp->highlightText(0, 0);	
 		}
-		mSelectionChanged = TRUE;
+		mSelectionChanged = true;
 	}
 }
 
@@ -2323,7 +2350,7 @@ void LLScrollListCtrl::commitIfChanged()
 {
 	if (mSelectionChanged)
 	{
-		mDirty = TRUE;
+		mDirty = true;
 		mSelectionChanged = FALSE;
 		onCommit();
 	}
@@ -2434,7 +2461,8 @@ void LLScrollListCtrl::sortOnce(S32 column, BOOL ascending)
 
 void LLScrollListCtrl::dirtyColumns() 
 { 
-	mColumnsDirty = TRUE; 
+	mColumnsDirty = true; 
+	mColumnWidthsDirty = true;
 
 	// need to keep mColumnsIndexed up to date
 	// just in case someone indexes into it immediately
@@ -3003,7 +3031,7 @@ void LLScrollListCtrl::resetDirty()
 void LLScrollListCtrl::onFocusReceived()
 {
 	// forget latent selection changes when getting focus
-	mSelectionChanged = FALSE;
+	mSelectionChanged = false;
 	LLUICtrl::onFocusReceived();
 }
 
diff --git a/indra/llui/llscrolllistctrl.h b/indra/llui/llscrolllistctrl.h
index e83794e173..38450b6313 100644
--- a/indra/llui/llscrolllistctrl.h
+++ b/indra/llui/llscrolllistctrl.h
@@ -343,8 +343,8 @@ public:
 	static void onClickColumn(void *userdata);
 
 	virtual void updateColumns();
-	void calcColumnWidths();
-	S32 getMaxContentWidth() { return mMaxContentWidth; }
+	S32 calcMaxContentWidth();
+	bool updateColumnWidths();
 
 	void setHeadingHeight(S32 heading_height);
 	/**
@@ -440,16 +440,17 @@ private:
 	S32				mHeadingHeight;	// the height of the column header buttons, if visible
 	U32				mMaxSelectable; 
 	LLScrollbar*	mScrollbar;
-	BOOL 			mAllowMultipleSelection;
-	BOOL			mAllowKeyboardMovement;
-	BOOL			mCommitOnKeyboardMovement;
-	BOOL			mCommitOnSelectionChange;
-	BOOL			mSelectionChanged;
-	BOOL			mNeedsScroll;
-	BOOL			mMouseWheelOpaque;
-	BOOL			mCanSelect;
-	const BOOL		mDisplayColumnHeaders;
-	BOOL			mColumnsDirty;
+	bool 			mAllowMultipleSelection;
+	bool			mAllowKeyboardMovement;
+	bool			mCommitOnKeyboardMovement;
+	bool			mCommitOnSelectionChange;
+	bool			mSelectionChanged;
+	bool			mNeedsScroll;
+	bool			mMouseWheelOpaque;
+	bool			mCanSelect;
+	bool			mDisplayColumnHeaders;
+	bool			mColumnsDirty;
+	bool			mColumnWidthsDirty;
 
 	mutable item_list	mItemList;
 
@@ -458,7 +459,6 @@ private:
 	S32				mMaxItemCount; 
 
 	LLRect			mItemListRect;
-	S32				mMaxContentWidth;
 	S32             mColumnPadding;
 
 	BOOL			mBackgroundVisible;
@@ -498,7 +498,7 @@ private:
 	typedef std::map<std::string, LLScrollListColumn*> column_map_t;
 	column_map_t mColumns;
 
-	BOOL			mDirty;
+	bool			mDirty;
 	S32				mOriginalSelection;
 
 	ContextMenuType mContextMenuType;
diff --git a/indra/llui/lltransutil.cpp b/indra/llui/lltransutil.cpp
index 58fa8a0828..80d079cbc8 100644
--- a/indra/llui/lltransutil.cpp
+++ b/indra/llui/lltransutil.cpp
@@ -31,15 +31,20 @@
 #include "lltrans.h"
 #include "lluictrlfactory.h"
 #include "llxmlnode.h"
-
+#include "lldir.h"
 
 bool LLTransUtil::parseStrings(const std::string& xml_filename, const std::set<std::string>& default_args)
 {
 	LLXMLNodePtr root;
-	BOOL success = LLUICtrlFactory::getLayeredXMLNode(xml_filename, root);
+	// Pass LLDir::ALL_SKINS to load a composite of all the individual string
+	// definitions in the default skin and the current skin. This means an
+	// individual skin can provide an xml_filename that overrides only a
+	// subset of the available string definitions; any string definition not
+	// overridden by that skin will be sought in the default skin.
+	bool success = LLUICtrlFactory::getLayeredXMLNode(xml_filename, root, LLDir::ALL_SKINS);
 	if (!success)
 	{
-		llerrs << "Couldn't load string table" << llendl;
+		llerrs << "Couldn't load string table " << xml_filename << llendl;
 		return false;
 	}
 
@@ -54,7 +59,7 @@ bool LLTransUtil::parseLanguageStrings(const std::string& xml_filename)
 	
 	if (!success)
 	{
-		llerrs << "Couldn't load string table " << xml_filename << llendl;
+		llerrs << "Couldn't load localization table " << xml_filename << llendl;
 		return false;
 	}
 	
diff --git a/indra/llui/llui.cpp b/indra/llui/llui.cpp
index 87bf518aa1..6d2bc1837c 100644
--- a/indra/llui/llui.cpp
+++ b/indra/llui/llui.cpp
@@ -1836,88 +1836,37 @@ struct Paths : public LLInitParam::Block<Paths>
 	{}
 };
 
-//static
-void LLUI::setupPaths()
-{
-	std::string filename = gDirUtilp->getExpandedFilename(LL_PATH_SKINS, "paths.xml");
-
-	LLXMLNodePtr root;
-	BOOL success  = LLXMLNode::parseFile(filename, root, NULL);
-	Paths paths;
-
-	if(success)
-	{
-		LLXUIParser parser;
-		parser.readXUI(root, paths, filename);
-	}
-	sXUIPaths.clear();
-	
-	if (success && paths.validateBlock())
-	{
-		LLStringUtil::format_map_t path_args;
-		path_args["[LANGUAGE]"] = LLUI::getLanguage();
-		
-		for (LLInitParam::ParamIterator<Directory>::const_iterator it = paths.directories.begin(), 
-				end_it = paths.directories.end();
-			it != end_it;
-			++it)
-		{
-			std::string path_val_ui;
-			for (LLInitParam::ParamIterator<SubDir>::const_iterator subdir_it = it->subdirs.begin(),
-					subdir_end_it = it->subdirs.end();
-				subdir_it != subdir_end_it;)
-			{
-				path_val_ui += subdir_it->value();
-				if (++subdir_it != subdir_end_it)
-					path_val_ui += gDirUtilp->getDirDelimiter();
-			}
-			LLStringUtil::format(path_val_ui, path_args);
-			if (std::find(sXUIPaths.begin(), sXUIPaths.end(), path_val_ui) == sXUIPaths.end())
-			{
-				sXUIPaths.push_back(path_val_ui);
-			}
-
-		}
-	}
-	else // parsing failed
-	{
-		std::string slash = gDirUtilp->getDirDelimiter();
-		std::string dir = "xui" + slash + "en";
-		llwarns << "XUI::config file unable to open: " << filename << llendl;
-		sXUIPaths.push_back(dir);
-	}
-}
-
 
 //static
 std::string LLUI::locateSkin(const std::string& filename)
 {
-	std::string slash = gDirUtilp->getDirDelimiter();
 	std::string found_file = filename;
-	if (!gDirUtilp->fileExists(found_file))
+	if (gDirUtilp->fileExists(found_file))
 	{
-		found_file = gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, filename); // Should be CUSTOM_SKINS?
+		return found_file;
 	}
-	if (sSettingGroups["config"] && sSettingGroups["config"]->controlExists("Language"))
+
+	found_file = gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, filename); // Should be CUSTOM_SKINS?
+	if (gDirUtilp->fileExists(found_file))
 	{
-		if (!gDirUtilp->fileExists(found_file))
-		{
-			std::string localization = getLanguage();
-			std::string local_skin = "xui" + slash + localization + slash + filename;
-			found_file = gDirUtilp->findSkinnedFilename(local_skin);
-		}
+		return found_file;
 	}
-	if (!gDirUtilp->fileExists(found_file))
+
+	found_file = gDirUtilp->findSkinnedFilename(LLDir::XUI, filename);
+	if (! found_file.empty())
 	{
-		std::string local_skin = "xui" + slash + "en" + slash + filename;
-		found_file = gDirUtilp->findSkinnedFilename(local_skin);
+		return found_file;
 	}
-	if (!gDirUtilp->fileExists(found_file))
+
+	found_file = gDirUtilp->getExpandedFilename(LL_PATH_APP_SETTINGS, filename);
+	if (gDirUtilp->fileExists(found_file))
 	{
-		found_file = gDirUtilp->getExpandedFilename(LL_PATH_APP_SETTINGS, filename);
+		return found_file;
 	}
-	return found_file;
-}	
+	LL_WARNS("LLUI") << "Can't find '" << filename
+					 << "' in user settings, any skin directory or app_settings" << LL_ENDL;
+	return "";
+}
 
 //static
 LLVector2 LLUI::getWindowSize()
diff --git a/indra/llui/llui.h b/indra/llui/llui.h
index 28e84fa444..c5a12d2b31 100644
--- a/indra/llui/llui.h
+++ b/indra/llui/llui.h
@@ -292,11 +292,6 @@ public:
 	// Return the ISO639 language name ("en", "ko", etc.) for the viewer UI.
 	// http://www.loc.gov/standards/iso639-2/php/code_list.php
 	static std::string getLanguage();
-	
-	static void setupPaths();
-	static const std::vector<std::string>& getXUIPaths() { return sXUIPaths; }
-	static std::string getSkinPath() { return sXUIPaths.front(); }
-	static std::string getLocalizedSkinPath() { return sXUIPaths.back(); }  //all files may not exist at the localized path
 
 	//helper functions (should probably move free standing rendering helper functions here)
 	static LLView* getRootView() { return sRootView; }
diff --git a/indra/llui/lluicolortable.cpp b/indra/llui/lluicolortable.cpp
index 9455d09cc0..ffeff15968 100644
--- a/indra/llui/lluicolortable.cpp
+++ b/indra/llui/lluicolortable.cpp
@@ -32,6 +32,7 @@
 #include "llui.h"
 #include "lluicolortable.h"
 #include "lluictrlfactory.h"
+#include <boost/foreach.hpp>
 
 LLUIColorTable::ColorParams::ColorParams()
 :	value("value"),
@@ -206,19 +207,12 @@ bool LLUIColorTable::loadFromSettings()
 {
 	bool result = false;
 
-	std::string default_filename = gDirUtilp->getExpandedFilename(LL_PATH_DEFAULT_SKIN, "colors.xml");
-	result |= loadFromFilename(default_filename, mLoadedColors);
-
-	std::string current_filename = gDirUtilp->getExpandedFilename(LL_PATH_TOP_SKIN, "colors.xml");
-	if(current_filename != default_filename)
-	{
-		result |= loadFromFilename(current_filename, mLoadedColors);
-	}
-
-	current_filename = gDirUtilp->getExpandedFilename(LL_PATH_USER_SKIN, "colors.xml");
-	if(current_filename != default_filename)
+	// pass constraint=LLDir::ALL_SKINS because we want colors.xml from every
+	// skin dir
+	BOOST_FOREACH(std::string colors_path,
+				  gDirUtilp->findSkinnedFilenames(LLDir::SKINBASE, "colors.xml", LLDir::ALL_SKINS))
 	{
-		result |= loadFromFilename(current_filename, mLoadedColors);
+		result |= loadFromFilename(colors_path, mLoadedColors);
 	}
 
 	std::string user_filename = gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, "colors.xml");
diff --git a/indra/llui/lluictrlfactory.cpp b/indra/llui/lluictrlfactory.cpp
index 25e7a31e90..bd06476936 100644
--- a/indra/llui/lluictrlfactory.cpp
+++ b/indra/llui/lluictrlfactory.cpp
@@ -90,10 +90,12 @@ LLUICtrlFactory::~LLUICtrlFactory()
 
 void LLUICtrlFactory::loadWidgetTemplate(const std::string& widget_tag, LLInitParam::BaseBlock& block)
 {
-	std::string filename = std::string("widgets") + gDirUtilp->getDirDelimiter() + widget_tag + ".xml";
+	std::string filename = gDirUtilp->add("widgets", widget_tag + ".xml");
 	LLXMLNodePtr root_node;
 
-	std::string full_filename = gDirUtilp->findSkinnedFilename(LLUI::getXUIPaths().front(), filename);
+	// Here we're looking for the "en" version, the default-language version
+	// of the file, rather than the localized version.
+	std::string full_filename = gDirUtilp->findSkinnedFilenameBaseLang(LLDir::XUI, filename);
 	if (!full_filename.empty())
 	{
 		LLUICtrlFactory::instance().pushFileName(full_filename);
@@ -149,22 +151,12 @@ static LLFastTimer::DeclareTimer FTM_XML_PARSE("XML Reading/Parsing");
 //-----------------------------------------------------------------------------
 // getLayeredXMLNode()
 //-----------------------------------------------------------------------------
-bool LLUICtrlFactory::getLayeredXMLNode(const std::string &xui_filename, LLXMLNodePtr& root)
+bool LLUICtrlFactory::getLayeredXMLNode(const std::string &xui_filename, LLXMLNodePtr& root,
+                                        LLDir::ESkinConstraint constraint)
 {
 	LLFastTimer timer(FTM_XML_PARSE);
-	
-	std::vector<std::string> paths;
-	std::string path = gDirUtilp->findSkinnedFilename(LLUI::getSkinPath(), xui_filename);
-	if (!path.empty())
-	{
-		paths.push_back(path);
-	}
-
-	std::string localize_path = gDirUtilp->findSkinnedFilename(LLUI::getLocalizedSkinPath(), xui_filename);
-	if (!localize_path.empty() && localize_path != path)
-	{
-		paths.push_back(localize_path);
-	}
+	std::vector<std::string> paths =
+		gDirUtilp->findSkinnedFilenames(LLDir::XUI, xui_filename, constraint);
 
 	if (paths.empty())
 	{
@@ -177,23 +169,6 @@ bool LLUICtrlFactory::getLayeredXMLNode(const std::string &xui_filename, LLXMLNo
 
 
 //-----------------------------------------------------------------------------
-// getLocalizedXMLNode()
-//-----------------------------------------------------------------------------
-bool LLUICtrlFactory::getLocalizedXMLNode(const std::string &xui_filename, LLXMLNodePtr& root)
-{
-	LLFastTimer timer(FTM_XML_PARSE);
-	std::string full_filename = gDirUtilp->findSkinnedFilename(LLUI::getLocalizedSkinPath(), xui_filename);
-	if (!LLXMLNode::parseFile(full_filename, root, NULL))
-	{
-		return false;
-	}
-	else
-	{
-		return true;
-	}
-}
-
-//-----------------------------------------------------------------------------
 // saveToXML()
 //-----------------------------------------------------------------------------
 S32 LLUICtrlFactory::saveToXML(LLView* viewp, const std::string& filename)
@@ -239,8 +214,10 @@ std::string LLUICtrlFactory::getCurFileName()
 
 
 void LLUICtrlFactory::pushFileName(const std::string& name) 
-{ 
-	mFileNames.push_back(gDirUtilp->findSkinnedFilename(LLUI::getSkinPath(), name)); 
+{
+	// Here we seem to be looking for the default language file ("en") rather
+	// than the localized one, if any.
+	mFileNames.push_back(gDirUtilp->findSkinnedFilenameBaseLang(LLDir::XUI, name));
 }
 
 void LLUICtrlFactory::popFileName() 
@@ -255,14 +232,6 @@ void LLUICtrlFactory::setCtrlParent(LLView* view, LLView* parent, S32 tab_group)
 	parent->addChild(view, tab_group);
 }
 
-
-// Avoid directly using LLUI and LLDir in the template code
-//static
-std::string LLUICtrlFactory::findSkinnedFilename(const std::string& filename)
-{
-	return gDirUtilp->findSkinnedFilename(LLUI::getSkinPath(), filename);
-}
-
 //static 
 void LLUICtrlFactory::copyName(LLXMLNodePtr src, LLXMLNodePtr dest)
 {
diff --git a/indra/llui/lluictrlfactory.h b/indra/llui/lluictrlfactory.h
index 4e54354731..f6971261d7 100644
--- a/indra/llui/lluictrlfactory.h
+++ b/indra/llui/lluictrlfactory.h
@@ -32,6 +32,7 @@
 #include "llregistry.h"
 #include "llxuiparser.h"
 #include "llstl.h"
+#include "lldir.h"
 
 class LLView;
 
@@ -161,32 +162,21 @@ public:
 	LLView* createFromXML(LLXMLNodePtr node, LLView* parent, const std::string& filename, const widget_registry_t&, LLXMLNodePtr output_node );
 
 	template<typename T>
-	static T* createFromFile(const std::string &filename, LLView *parent, const widget_registry_t& registry, LLXMLNodePtr output_node = NULL)
+	static T* createFromFile(const std::string &filename, LLView *parent, const widget_registry_t& registry)
 	{
 		T* widget = NULL;
-		
-		std::string skinned_filename = findSkinnedFilename(filename);
+
 		instance().pushFileName(filename);
 		{
 			LLXMLNodePtr root_node;
 
-			//if exporting, only load the language being exported, 			
-			//instead of layering localized version on top of english			
-			if (output_node)			
-			{					
-				if (!LLUICtrlFactory::getLocalizedXMLNode(filename, root_node))				
-				{							
-					llwarns << "Couldn't parse XUI file: " <<  filename  << llendl;					
-					goto fail;				
-				}
-			}
-			else if (!LLUICtrlFactory::getLayeredXMLNode(filename, root_node))
+			if (!LLUICtrlFactory::getLayeredXMLNode(filename, root_node))
 			{
-				llwarns << "Couldn't parse XUI file: " << skinned_filename << llendl;
+				llwarns << "Couldn't parse XUI file: " << instance().getCurFileName() << llendl;
 				goto fail;
 			}
-			
-			LLView* view = getInstance()->createFromXML(root_node, parent, filename, registry, output_node);
+
+			LLView* view = getInstance()->createFromXML(root_node, parent, filename, registry, NULL);
 			if (view)
 			{
 				widget = dynamic_cast<T*>(view);
@@ -214,8 +204,8 @@ fail:
 
 	static void createChildren(LLView* viewp, LLXMLNodePtr node, const widget_registry_t&, LLXMLNodePtr output_node = NULL);
 
-	static bool getLayeredXMLNode(const std::string &filename, LLXMLNodePtr& root);
-	static bool getLocalizedXMLNode(const std::string &xui_filename, LLXMLNodePtr& root);
+	static bool getLayeredXMLNode(const std::string &filename, LLXMLNodePtr& root,
+								  LLDir::ESkinConstraint constraint=LLDir::CURRENT_SKIN);
 
 private:
 	//NOTE: both friend declarations are necessary to keep both gcc and msvc happy
@@ -300,9 +290,6 @@ private:
 	// this exists to get around dependency on llview
 	static void setCtrlParent(LLView* view, LLView* parent, S32 tab_group);
 
-	// Avoid directly using LLUI and LLDir in the template code
-	static std::string findSkinnedFilename(const std::string& filename);
-
 	class LLPanel*		mDummyPanel;
 	std::vector<std::string>	mFileNames;
 };
diff --git a/indra/llui/llview.cpp b/indra/llui/llview.cpp
index 54843227b7..ad9bec9f61 100644
--- a/indra/llui/llview.cpp
+++ b/indra/llui/llview.cpp
@@ -1549,16 +1549,18 @@ void LLView::screenPointToLocal(S32 screen_x, S32 screen_y, S32* local_x, S32* l
 
 void LLView::localPointToScreen(S32 local_x, S32 local_y, S32* screen_x, S32* screen_y) const
 {
-	*screen_x = local_x + getRect().mLeft;
-	*screen_y = local_y + getRect().mBottom;
+	*screen_x = local_x;
+	*screen_y = local_y;
 
 	const LLView* cur = this;
-	while( cur->mParentView )
+	do
 	{
+		LLRect cur_rect = cur->getRect();
+		*screen_x += cur_rect.mLeft;
+		*screen_y += cur_rect.mBottom;
 		cur = cur->mParentView;
-		*screen_x += cur->getRect().mLeft;
-		*screen_y += cur->getRect().mBottom;
 	}
+	while( cur );
 }
 
 void LLView::screenRectToLocal(const LLRect& screen, LLRect* local) const