Pull and merge from ssh://hg@bitbucket.org/lindenlab/viewer-release.

34 files changed, 4018 insertions, 655 deletions

diff --git a/indra/llui/CMakeLists.txt b/indra/llui/CMakeLists.txt
index a9ad0a3c0b..bc225593d8 100644
--- a/indra/llui/CMakeLists.txt
+++ b/indra/llui/CMakeLists.txt
@@ -12,7 +12,6 @@ include(LLRender)
 include(LLWindow)
 include(LLVFS)
 include(LLXML)
-include(LLXUIXML)
 
 include_directories(
     ${LLCOMMON_INCLUDE_DIRS}
@@ -24,7 +23,7 @@ include_directories(
     ${LLWINDOW_INCLUDE_DIRS}
     ${LLVFS_INCLUDE_DIRS}
     ${LLXML_INCLUDE_DIRS}
-    ${LLXUIXML_INCLUDE_DIRS}
+    ${LIBS_PREBUILD_DIR}/include/hunspell
     )
 
 set(llui_SOURCE_FILES
@@ -87,10 +86,10 @@ set(llui_SOURCE_FILES
     llscrolllistcolumn.cpp
     llscrolllistctrl.cpp
     llscrolllistitem.cpp
-    llsdparam.cpp
     llsearcheditor.cpp
     llslider.cpp
     llsliderctrl.cpp
+    llspellcheck.cpp
     llspinctrl.cpp
     llstatbar.cpp
     llstatgraph.cpp
@@ -104,11 +103,13 @@ set(llui_SOURCE_FILES
     lltextutil.cpp
     lltextvalidate.cpp
     lltimectrl.cpp
+    lltrans.cpp
     lltransutil.cpp
     lltoggleablemenu.cpp
     lltoolbar.cpp
     lltooltip.cpp
     llui.cpp
+    lluicolor.cpp
     lluicolortable.cpp
     lluictrl.cpp
     lluictrlfactory.cpp
@@ -125,6 +126,7 @@ set(llui_SOURCE_FILES
     llview.cpp
     llviewquery.cpp
     llwindowshade.cpp
+    llxuiparser.cpp
     )
     
 set(llui_HEADER_FILES
@@ -197,9 +199,10 @@ set(llui_HEADER_FILES
     llscrolllistcolumn.h
     llscrolllistctrl.h
     llscrolllistitem.h
-    llsdparam.h
     llsliderctrl.h
     llslider.h
+    llspellcheck.h
+    llspellcheckmenuhandler.h
     llspinctrl.h
     llstatbar.h
     llstatgraph.h
@@ -216,6 +219,7 @@ set(llui_HEADER_FILES
     lltoggleablemenu.h
     lltoolbar.h
     lltooltip.h
+    lltrans.h
     lltransutil.h
     lluicolortable.h
     lluiconstants.h
@@ -223,6 +227,7 @@ set(llui_HEADER_FILES
     lluictrl.h
     lluifwd.h
     llui.h
+    lluicolor.h
     lluiimage.h
     lluistring.h
     llundo.h
@@ -236,6 +241,7 @@ set(llui_HEADER_FILES
     llview.h
     llviewquery.h
     llwindowshade.h
+    llxuiparser.h
     )
 
 set_source_files_properties(${llui_HEADER_FILES}
@@ -266,6 +272,7 @@ target_link_libraries(llui
     ${LLXUIXML_LIBRARIES}
     ${LLXML_LIBRARIES}
     ${LLMATH_LIBRARIES}
+    ${HUNSPELL_LIBRARY}
     ${LLCOMMON_LIBRARIES} # must be after llimage, llwindow, llrender
     )
 
diff --git a/indra/llui/llcontainerview.cpp b/indra/llui/llcontainerview.cpp
index e01e331acf..e08ccb0b78 100644
--- a/indra/llui/llcontainerview.cpp
+++ b/indra/llui/llcontainerview.cpp
@@ -196,24 +196,24 @@ void LLContainerView::arrange(S32 width, S32 height, BOOL called_from_parent)
 	if (total_height < height)
 		total_height = height;
 	
+	LLRect my_rect = getRect();
 	if (followsTop())
 	{
-		// HACK: casting away const. Should use setRect or some helper function instead.
-		const_cast<LLRect&>(getRect()).mBottom = getRect().mTop - total_height;
+		my_rect.mBottom = my_rect.mTop - total_height;
 	}
 	else
 	{
-		// HACK: casting away const. Should use setRect or some helper function instead.
-		const_cast<LLRect&>(getRect()).mTop = getRect().mBottom + total_height;
+		my_rect.mTop = my_rect.mBottom + total_height;
 	}
-	// HACK: casting away const. Should use setRect or some helper function instead.
-		const_cast<LLRect&>(getRect()).mRight = getRect().mLeft + width;
+
+	my_rect.mRight = my_rect.mLeft + width;
+	setRect(my_rect);
 
 	top = total_height;
 	if (mShowLabel)
-		{
-			top -= 20;
-		}
+	{
+		top -= 20;
+	}
 	
 	bottom = top;
 
diff --git a/indra/llui/llfolderview.cpp b/indra/llui/llfolderview.cpp
index d8ed09fbe6..e09026fc33 100644
--- a/indra/llui/llfolderview.cpp
+++ b/indra/llui/llfolderview.cpp
@@ -360,7 +360,6 @@ void LLFolderView::reshape(S32 width, S32 height, BOOL called_from_parent)
 	{
 		width = scroll_rect.getWidth();
 	}
-
 	LLView::reshape(width, height, called_from_parent);
 	mReshapeSignal(mSelectedItems, FALSE);
 }
diff --git a/indra/llui/llfolderviewitem.cpp b/indra/llui/llfolderviewitem.cpp
index a356d587f9..cd8d8bafbc 100644
--- a/indra/llui/llfolderviewitem.cpp
+++ b/indra/llui/llfolderviewitem.cpp
@@ -209,7 +209,7 @@ BOOL LLFolderViewItem::passedFilter(S32 filter_generation)
 }
 
 void LLFolderViewItem::refresh()
-{ 
+{
 	LLFolderViewModelItem& vmi = *getViewModelItem();
 
 	mLabel = vmi.getDisplayName();
@@ -219,11 +219,11 @@ void LLFolderViewItem::refresh()
 	mIconOpen = vmi.getIconOpen();
 	mIconOverlay = vmi.getIconOverlay();
 
-	if (mRoot->useLabelSuffix())
-	{
+		if (mRoot->useLabelSuffix())
+		{
 		mLabelStyle = vmi.getLabelStyle();
 		mLabelSuffix = vmi.getLabelSuffix();
-	}
+}
 
 	//TODO RN: make sure this logic still fires
 	//std::string searchable_label(mLabel);
@@ -253,7 +253,7 @@ void LLFolderViewItem::arrangeAndSet(BOOL set_selection,
 	LLFolderView* root = getRoot();
 	if (getParentFolder())
 	{
-		getParentFolder()->requestArrange();
+	getParentFolder()->requestArrange();
 	}
 	if(set_selection)
 	{
@@ -370,7 +370,7 @@ BOOL LLFolderViewItem::isMovable()
 BOOL LLFolderViewItem::isRemovable()
 {
 	return getViewModelItem()->isItemRemovable();
-}
+	}
 
 void LLFolderViewItem::destroyView()
 {
@@ -394,7 +394,7 @@ BOOL LLFolderViewItem::remove()
 		return FALSE;
 	}
 	return getViewModelItem()->removeItem();
-}
+	}
 
 // Build an appropriate context menu for the item.
 void LLFolderViewItem::buildContextMenu(LLMenuGL& menu, U32 flags)
@@ -481,24 +481,24 @@ BOOL LLFolderViewItem::handleHover( S32 x, S32 y, MASK mask )
 
 	if( hasMouseCapture() && isMovable() )
 	{
-		LLFolderView* root = getRoot();
+			LLFolderView* root = getRoot();
 
 		if( (x - mDragStartX) * (x - mDragStartX) + (y - mDragStartY) * (y - mDragStartY) > drag_and_drop_threshold() * drag_and_drop_threshold() 
 			&& root->getCurSelectedItem()
 			&& root->startDrag())
-		{
-			// RN: when starting drag and drop, clear out last auto-open
-			root->autoOpenTest(NULL);
-			root->setShowSelectionContext(TRUE);
+				{
+					// RN: when starting drag and drop, clear out last auto-open
+					root->autoOpenTest(NULL);
+					root->setShowSelectionContext(TRUE);
 
-			// Release keyboard focus, so that if stuff is dropped into the
-			// world, pressing the delete key won't blow away the inventory
-			// item.
-			gFocusMgr.setKeyboardFocus(NULL);
+					// Release keyboard focus, so that if stuff is dropped into the
+					// world, pressing the delete key won't blow away the inventory
+					// item.
+					gFocusMgr.setKeyboardFocus(NULL);
 
 			getWindow()->setCursor(UI_CURSOR_ARROW);
 			return TRUE;
-		}
+			}
 		else
 		{
 			getWindow()->setCursor(UI_CURSOR_NOLOCKED);
@@ -599,17 +599,17 @@ BOOL LLFolderViewItem::handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
 
 void LLFolderViewItem::draw()
 {
-	static LLUIColor sFgColor 			= LLUIColorTable::instance().getColor("MenuItemEnabledColor", DEFAULT_WHITE);
-	static LLUIColor sHighlightBgColor 	= LLUIColorTable::instance().getColor("MenuItemHighlightBgColor", DEFAULT_WHITE);
-	static LLUIColor sHighlightFgColor 	= LLUIColorTable::instance().getColor("MenuItemHighlightFgColor", DEFAULT_WHITE);
+	static LLUIColor sFgColor = LLUIColorTable::instance().getColor("MenuItemEnabledColor", DEFAULT_WHITE);
+	static LLUIColor sHighlightBgColor = LLUIColorTable::instance().getColor("MenuItemHighlightBgColor", DEFAULT_WHITE);
+	static LLUIColor sHighlightFgColor = LLUIColorTable::instance().getColor("MenuItemHighlightFgColor", DEFAULT_WHITE);
 	static LLUIColor sFocusOutlineColor = LLUIColorTable::instance().getColor("InventoryFocusOutlineColor", DEFAULT_WHITE);
-	static LLUIColor sFilterBGColor 	= LLUIColorTable::instance().getColor("FilterBackgroundColor", DEFAULT_WHITE);
-	static LLUIColor sFilterTextColor 	= LLUIColorTable::instance().getColor("FilterTextColor", DEFAULT_WHITE);
-	static LLUIColor sSuffixColor 		= LLUIColorTable::instance().getColor("InventoryItemColor", DEFAULT_WHITE);
-	static LLUIColor sLibraryColor 		= LLUIColorTable::instance().getColor("InventoryItemLibraryColor", DEFAULT_WHITE);
-	static LLUIColor sLinkColor 		= LLUIColorTable::instance().getColor("InventoryItemLinkColor", DEFAULT_WHITE);
+	static LLUIColor sFilterBGColor = LLUIColorTable::instance().getColor("FilterBackgroundColor", DEFAULT_WHITE);
+	static LLUIColor sFilterTextColor = LLUIColorTable::instance().getColor("FilterTextColor", DEFAULT_WHITE);
+	static LLUIColor sSuffixColor = LLUIColorTable::instance().getColor("InventoryItemColor", DEFAULT_WHITE);
+	static LLUIColor sLibraryColor = LLUIColorTable::instance().getColor("InventoryItemLibraryColor", DEFAULT_WHITE);
+	static LLUIColor sLinkColor = LLUIColorTable::instance().getColor("InventoryItemLinkColor", DEFAULT_WHITE);
 	static LLUIColor sSearchStatusColor = LLUIColorTable::instance().getColor("InventorySearchStatusColor", DEFAULT_WHITE);
-	static LLUIColor sMouseOverColor 	= LLUIColorTable::instance().getColor("InventoryMouseOverColor", DEFAULT_WHITE);
+	static LLUIColor sMouseOverColor = LLUIColorTable::instance().getColor("InventoryMouseOverColor", DEFAULT_WHITE);
 
 	const Params& default_params = LLUICtrlFactory::getDefaultParams<LLFolderViewItem>();
 	const S32 TOP_PAD = default_params.item_top_pad;
@@ -806,7 +806,7 @@ const LLFolderViewModelInterface* LLFolderViewItem::getFolderViewModel( void ) c
 LLFolderViewModelInterface* LLFolderViewItem::getFolderViewModel( void )
 		{
 	return getRoot()->getFolderViewModel();
-}
+		}
 
 
 ///----------------------------------------------------------------------------
@@ -1495,11 +1495,27 @@ BOOL LLFolderViewFolder::addItem(LLFolderViewItem* item)
 	
 	item->getViewModelItem()->dirtyFilter();
 
+	// XXX stinson TODO : handle the creation date
+#if 0
+	// Update the folder creation date if the child is newer than our current date
+	setCreationDate(llmax<time_t>(mCreationDate, item->getCreationDate()));
+#endif
+
 	// Handle sorting
 	requestArrange();
 	requestSort();
 
 	getViewModelItem()->addChild(item->getViewModelItem());
+	// XXX stinson TODO : handle the creation date
+#if 0
+	// Traverse parent folders and update creation date and resort, if necessary
+	LLFolderViewFolder* parentp = getParentFolder();
+	while (parentp)
+	{
+		// Update the folder creation date if the child is newer than our current date
+		parentp->setCreationDate(llmax<time_t>(parentp->mCreationDate, item->getCreationDate()));
+	}
+#endif
 
 	//TODO RN - make sort bubble up as long as parent Folder doesn't have anything matching sort criteria
 	//// Traverse parent folders and update creation date and resort, if necessary
@@ -1545,14 +1561,14 @@ void LLFolderViewFolder::requestArrange()
 { 
 	//if ( mLastArrangeGeneration != -1)
 	{
-		mLastArrangeGeneration = -1; 
-		// flag all items up to root
-		if (mParentFolder)
-		{
-			mParentFolder->requestArrange();
+	mLastArrangeGeneration = -1; 
+	// flag all items up to root
+	if (mParentFolder)
+	{
+		mParentFolder->requestArrange();
+	}
 		}
 	}
-}
 
 void LLFolderViewFolder::toggleOpen()
 {
@@ -1569,12 +1585,12 @@ void LLFolderViewFolder::setOpenArrangeRecursively(BOOL openitem, ERecurseType r
 {
 	BOOL was_open = isOpen();
 	mIsOpen = openitem;
-	if(!was_open && openitem)
-	{
+		if(!was_open && openitem)
+		{
 		getViewModelItem()->openItem();
-	}
-	else if(was_open && !openitem)
-	{
+		}
+		else if(was_open && !openitem)
+		{
 		getViewModelItem()->closeItem();
 	}
 
diff --git a/indra/llui/lllineeditor.cpp b/indra/llui/lllineeditor.cpp
index d0fbf4b913..48d49af588 100644
--- a/indra/llui/lllineeditor.cpp
+++ b/indra/llui/lllineeditor.cpp
@@ -45,6 +45,7 @@
 #include "llkeyboard.h"
 #include "llrect.h"
 #include "llresmgr.h"
+#include "llspellcheck.h"
 #include "llstring.h"
 #include "llwindow.h"
 #include "llui.h"
@@ -65,6 +66,7 @@ const S32	SCROLL_INCREMENT_ADD = 0;	// make space for typing
 const S32   SCROLL_INCREMENT_DEL = 4;	// make space for baskspacing
 const F32   AUTO_SCROLL_TIME = 0.05f;
 const F32	TRIPLE_CLICK_INTERVAL = 0.3f;	// delay between double and triple click. *TODO: make this equal to the double click interval?
+const F32	SPELLCHECK_DELAY = 0.5f;	// delay between the last keypress and spell checking the word the cursor is on
 
 const std::string PASSWORD_ASTERISK( "\xE2\x80\xA2" ); // U+2022 BULLET
 
@@ -88,6 +90,7 @@ LLLineEditor::Params::Params()
 	background_image_focused("background_image_focused"),
 	select_on_focus("select_on_focus", false),
 	revert_on_esc("revert_on_esc", true),
+	spellcheck("spellcheck", false),
 	commit_on_focus_lost("commit_on_focus_lost", true),
 	ignore_tab("ignore_tab", true),
 	is_password("is_password", false),
@@ -134,6 +137,9 @@ LLLineEditor::LLLineEditor(const LLLineEditor::Params& p)
 	mIgnoreArrowKeys( FALSE ),
 	mIgnoreTab( p.ignore_tab ),
 	mDrawAsterixes( p.is_password ),
+	mSpellCheck( p.spellcheck ),
+	mSpellCheckStart(-1),
+	mSpellCheckEnd(-1),
 	mSelectAllonFocusReceived( p.select_on_focus ),
 	mSelectAllonCommit( TRUE ),
 	mPassDelete(FALSE),
@@ -151,7 +157,8 @@ LLLineEditor::LLLineEditor(const LLLineEditor::Params& p)
 	mHighlightColor(p.highlight_color()),
 	mPreeditBgColor(p.preedit_bg_color()),
 	mGLFont(p.font),
-	mContextMenuHandle()
+	mContextMenuHandle(),
+	mAutoreplaceCallback()
 {
 	llassert( mMaxLengthBytes > 0 );
 
@@ -177,6 +184,12 @@ LLLineEditor::LLLineEditor(const LLLineEditor::Params& p)
 	updateTextPadding();
 	setCursor(mText.length());
 
+	if (mSpellCheck)
+	{
+		LLSpellChecker::setSettingsChangeCallback(boost::bind(&LLLineEditor::onSpellCheckSettingsChange, this));
+	}
+	mSpellCheckTimer.reset();
+
 	setPrevalidateInput(p.prevalidate_input_callback());
 	setPrevalidate(p.prevalidate_callback());
 
@@ -195,7 +208,6 @@ LLLineEditor::~LLLineEditor()
 	gFocusMgr.releaseFocusIfNeeded( this );
 }
 
-
 void LLLineEditor::onFocusReceived()
 {
 	gEditMenuHandler = this;
@@ -519,6 +531,99 @@ void LLLineEditor::selectAll()
 	updatePrimary();
 }
 
+bool LLLineEditor::getSpellCheck() const
+{
+	return (LLSpellChecker::getUseSpellCheck()) && (!mReadOnly) && (mSpellCheck);
+}
+
+const std::string& LLLineEditor::getSuggestion(U32 index) const
+{
+	return (index < mSuggestionList.size()) ? mSuggestionList[index] : LLStringUtil::null;
+}
+
+U32 LLLineEditor::getSuggestionCount() const
+{
+	return mSuggestionList.size();
+}
+
+void LLLineEditor::replaceWithSuggestion(U32 index)
+{
+	for (std::list<std::pair<U32, U32> >::const_iterator it = mMisspellRanges.begin(); it != mMisspellRanges.end(); ++it)
+	{
+		if ( (it->first <= (U32)mCursorPos) && (it->second >= (U32)mCursorPos) )
+		{
+			deselect();
+
+			// Delete the misspelled word
+			mText.erase(it->first, it->second - it->first);
+
+			// Insert the suggestion in its place
+			LLWString suggestion = utf8str_to_wstring(mSuggestionList[index]);
+			mText.insert(it->first, suggestion);
+			setCursor(it->first + (S32)suggestion.length());
+
+			break;
+		}
+	}
+	mSpellCheckStart = mSpellCheckEnd = -1;
+}
+
+void LLLineEditor::addToDictionary()
+{
+	if (canAddToDictionary())
+	{
+		LLSpellChecker::instance().addToCustomDictionary(getMisspelledWord(mCursorPos));
+	}
+}
+
+bool LLLineEditor::canAddToDictionary() const
+{
+	return (getSpellCheck()) && (isMisspelledWord(mCursorPos));
+}
+
+void LLLineEditor::addToIgnore()
+{
+	if (canAddToIgnore())
+	{
+		LLSpellChecker::instance().addToIgnoreList(getMisspelledWord(mCursorPos));
+	}
+}
+
+bool LLLineEditor::canAddToIgnore() const
+{
+	return (getSpellCheck()) && (isMisspelledWord(mCursorPos));
+}
+
+std::string LLLineEditor::getMisspelledWord(U32 pos) const
+{
+	for (std::list<std::pair<U32, U32> >::const_iterator it = mMisspellRanges.begin(); it != mMisspellRanges.end(); ++it)
+	{
+		if ( (it->first <= pos) && (it->second >= pos) )
+		{
+			return wstring_to_utf8str(mText.getWString().substr(it->first, it->second - it->first));
+		}
+	}
+	return LLStringUtil::null;
+}
+
+bool LLLineEditor::isMisspelledWord(U32 pos) const
+{
+	for (std::list<std::pair<U32, U32> >::const_iterator it = mMisspellRanges.begin(); it != mMisspellRanges.end(); ++it)
+	{
+		if ( (it->first <= pos) && (it->second >= pos) )
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
+void LLLineEditor::onSpellCheckSettingsChange()
+{
+	// Recheck the spelling on every change
+	mMisspellRanges.clear();
+	mSpellCheckStart = mSpellCheckEnd = -1;
+}
 
 BOOL LLLineEditor::handleDoubleClick(S32 x, S32 y, MASK mask)
 {
@@ -866,6 +971,12 @@ void LLLineEditor::addChar(const llwchar uni_char)
 		LLUI::reportBadKeystroke();
 	}
 
+	if (!mReadOnly && mAutoreplaceCallback != NULL)
+	{
+		// call callback
+		mAutoreplaceCallback(mText, mCursorPos);
+	}
+
 	getWindow()->hideCursorUntilMouseMove();
 }
 
@@ -1058,9 +1169,8 @@ void LLLineEditor::cut()
 			LLUI::reportBadKeystroke();
 		}
 		else
-		if( mKeystrokeCallback )
 		{
-			mKeystrokeCallback( this );
+			onKeystroke();
 		}
 	}
 }
@@ -1187,9 +1297,8 @@ void LLLineEditor::pasteHelper(bool is_primary)
 				LLUI::reportBadKeystroke();
 			}
 			else
-			if( mKeystrokeCallback )
 			{
-				mKeystrokeCallback( this );
+				onKeystroke();
 			}
 		}
 	}
@@ -1442,9 +1551,10 @@ BOOL LLLineEditor::handleKeyHere(KEY key, MASK mask )
 			// Notify owner if requested
 			if (!need_to_rollback && handled)
 			{
-				if (mKeystrokeCallback)
+				onKeystroke();
+				if ( (!selection_modified) && (KEY_BACKSPACE == key) )
 				{
-					mKeystrokeCallback(this);
+					mSpellCheckTimer.setTimerExpirySec(SPELLCHECK_DELAY);
 				}
 			}
 		}
@@ -1497,12 +1607,11 @@ BOOL LLLineEditor::handleUnicodeCharHere(llwchar uni_char)
 		// Notify owner if requested
 		if( !need_to_rollback && handled )
 		{
-			if( mKeystrokeCallback )
-			{
-				// HACK! The only usage of this callback doesn't do anything with the character.
-				// We'll have to do something about this if something ever changes! - Doug
-				mKeystrokeCallback( this );
-			}
+			// HACK! The only usage of this callback doesn't do anything with the character.
+			// We'll have to do something about this if something ever changes! - Doug
+			onKeystroke();
+
+			mSpellCheckTimer.setTimerExpirySec(SPELLCHECK_DELAY);
 		}
 	}
 	return handled;
@@ -1531,9 +1640,7 @@ void LLLineEditor::doDelete()
 
 			if (!prevalidateInput(text_to_delete))
 			{
-				if( mKeystrokeCallback )
-					mKeystrokeCallback( this );
-
+				onKeystroke();
 				return;
 			}
 			setCursor(getCursor() + 1);
@@ -1549,10 +1656,9 @@ void LLLineEditor::doDelete()
 		}
 		else
 		{
-			if( mKeystrokeCallback )
-			{
-				mKeystrokeCallback( this );
-			}
+			onKeystroke();
+
+			mSpellCheckTimer.setTimerExpirySec(SPELLCHECK_DELAY);
 		}
 	}
 }
@@ -1624,6 +1730,10 @@ void LLLineEditor::draw()
 	background.stretch( -mBorderThickness );
 
 	S32 lineeditor_v_pad = (background.getHeight() - mGLFont->getLineHeight()) / 2;
+	if (mSpellCheck)
+	{
+		lineeditor_v_pad += 1;
+	}
 
 	drawBackground();
 	
@@ -1698,14 +1808,14 @@ void LLLineEditor::draw()
 	{
 		S32 select_left;
 		S32 select_right;
-		if( mSelectionStart < getCursor() )
+		if (mSelectionStart < mSelectionEnd)
 		{
 			select_left = mSelectionStart;
-			select_right = getCursor();
+			select_right = mSelectionEnd;
 		}
 		else
 		{
-			select_left = getCursor();
+			select_left = mSelectionEnd;
 			select_right = mSelectionStart;
 		}
 		
@@ -1749,7 +1859,7 @@ void LLLineEditor::draw()
 		if( (rendered_pixels_right < (F32)mTextRightEdge) && (rendered_text < text_len) )
 		{
 			// unselected, right side
-			mGLFont->render( 
+			rendered_text += mGLFont->render( 
 				mText, mScrollHPos + rendered_text,
 				rendered_pixels_right, text_bottom,
 				text_color,
@@ -1763,7 +1873,7 @@ void LLLineEditor::draw()
 	}
 	else
 	{
-		mGLFont->render( 
+		rendered_text = mGLFont->render( 
 			mText, mScrollHPos, 
 			rendered_pixels_right, text_bottom,
 			text_color,
@@ -1778,6 +1888,101 @@ void LLLineEditor::draw()
 	mBorder->setVisible(FALSE); // no more programmatic art.
 #endif
 
+	if ( (getSpellCheck()) && (mText.length() > 2) )
+	{
+		// Calculate start and end indices for the first and last visible word
+		U32 start = prevWordPos(mScrollHPos), end = nextWordPos(mScrollHPos + rendered_text);
+
+		if ( (mSpellCheckStart != start) || (mSpellCheckEnd != end) )
+		{
+			const LLWString& text = mText.getWString().substr(start, end);
+
+			// Find the start of the first word
+			U32 word_start = 0, word_end = 0;
+			while ( (word_start < text.length()) && (!LLStringOps::isAlpha(text[word_start])) )
+			{
+				word_start++;
+			}
+
+			// Iterate over all words in the text block and check them one by one
+			mMisspellRanges.clear();
+			while (word_start < text.length())
+			{
+				// Find the end of the current word (special case handling for "'" when it's used as a contraction)
+				word_end = word_start + 1;
+				while ( (word_end < text.length()) && 
+					    ((LLWStringUtil::isPartOfWord(text[word_end])) ||
+						 ((L'\'' == text[word_end]) && (word_end + 1 < text.length()) &&
+						  (LLStringOps::isAlnum(text[word_end - 1])) && (LLStringOps::isAlnum(text[word_end + 1])))) )
+				{
+					word_end++;
+				}
+				if (word_end > text.length())
+				{
+					break;
+				}
+
+				// Don't process words shorter than 3 characters
+				std::string word = wstring_to_utf8str(text.substr(word_start, word_end - word_start));
+				if ( (word.length() >= 3) && (!LLSpellChecker::instance().checkSpelling(word)) )
+				{
+					mMisspellRanges.push_back(std::pair<U32, U32>(start + word_start, start + word_end));
+				}
+
+				// Find the start of the next word
+				word_start = word_end + 1;
+				while ( (word_start < text.length()) && (!LLWStringUtil::isPartOfWord(text[word_start])) )
+				{
+					word_start++;
+				}
+			}
+
+			mSpellCheckStart = start;
+			mSpellCheckEnd = end;
+		}
+
+		// Draw squiggly lines under any (visible) misspelled words
+		for (std::list<std::pair<U32, U32> >::const_iterator it = mMisspellRanges.begin(); it != mMisspellRanges.end(); ++it)
+		{
+			// Skip over words that aren't (partially) visible
+			if ( ((it->first < start) && (it->second < start)) || (it->first > end) )
+			{
+				continue;
+			}
+
+			// Skip the current word if the user is still busy editing it
+			if ( (!mSpellCheckTimer.hasExpired()) && (it->first <= (U32)mCursorPos) && (it->second >= (U32)mCursorPos) )
+			{
+ 				continue;
+			}
+
+			S32 pxWidth = getRect().getWidth();
+			S32 pxStart = findPixelNearestPos(it->first - getCursor());
+			if (pxStart > pxWidth)
+			{
+				continue;
+			}
+			S32 pxEnd = findPixelNearestPos(it->second - getCursor());
+			if (pxEnd > pxWidth)
+			{
+				pxEnd = pxWidth;
+			}
+
+			S32 pxBottom = (S32)(text_bottom + mGLFont->getDescenderHeight());
+
+			gGL.color4ub(255, 0, 0, 200);
+			while (pxStart + 1 < pxEnd)
+			{
+				gl_line_2d(pxStart, pxBottom, pxStart + 2, pxBottom - 2);
+				if (pxStart + 3 < pxEnd)
+				{
+					gl_line_2d(pxStart + 2, pxBottom - 3, pxStart + 4, pxBottom - 1);
+				}
+				pxStart += 4;
+			}
+		}
+	}
+
 	// If we're editing...
 	if( hasFocus())
 	{
@@ -2109,6 +2314,15 @@ void LLLineEditor::setSelectAllonFocusReceived(BOOL b)
 	mSelectAllonFocusReceived = b;
 }
 
+void LLLineEditor::onKeystroke()
+{
+	if (mKeystrokeCallback)
+	{
+		mKeystrokeCallback(this);
+	}
+
+	mSpellCheckStart = mSpellCheckEnd = -1;
+}
 
 void LLLineEditor::setKeystrokeCallback(callback_t callback, void* user_data)
 {
@@ -2231,10 +2445,9 @@ void LLLineEditor::updatePreedit(const LLWString &preedit_string,
 
 	// Update of the preedit should be caused by some key strokes.
 	mKeystrokeTimer.reset();
-	if( mKeystrokeCallback )
-	{
-		mKeystrokeCallback( this );
-	}
+	onKeystroke();
+
+	mSpellCheckTimer.setTimerExpirySec(SPELLCHECK_DELAY);
 }
 
 BOOL LLLineEditor::getPreeditLocation(S32 query_offset, LLCoordGL *coord, LLRect *bounds, LLRect *control) const
@@ -2386,7 +2599,38 @@ void LLLineEditor::showContextMenu(S32 x, S32 y)
 
 		S32 screen_x, screen_y;
 		localPointToScreen(x, y, &screen_x, &screen_y);
-		menu->show(screen_x, screen_y);
+
+		setCursorAtLocalPos(x);
+		if (hasSelection())
+		{
+			if ( (mCursorPos < llmin(mSelectionStart, mSelectionEnd)) || (mCursorPos > llmax(mSelectionStart, mSelectionEnd)) )
+			{
+				deselect();
+			}
+			else
+			{
+				setCursor(llmax(mSelectionStart, mSelectionEnd));
+			}
+		}
+
+		bool use_spellcheck = getSpellCheck(), is_misspelled = false;
+		if (use_spellcheck)
+		{
+			mSuggestionList.clear();
+
+			// If the cursor is on a misspelled word, retrieve suggestions for it
+			std::string misspelled_word = getMisspelledWord(mCursorPos);
+			if ((is_misspelled = !misspelled_word.empty()) == true)
+			{
+				LLSpellChecker::instance().getSuggestions(misspelled_word, mSuggestionList);
+			}
+		}
+
+		menu->setItemVisible("Suggestion Separator", (use_spellcheck) && (!mSuggestionList.empty()));
+		menu->setItemVisible("Add to Dictionary", (use_spellcheck) && (is_misspelled));
+		menu->setItemVisible("Add to Ignore", (use_spellcheck) && (is_misspelled));
+		menu->setItemVisible("Spellcheck Separator", (use_spellcheck) && (is_misspelled));
+		menu->show(screen_x, screen_y, this);
 	}
 }
 
diff --git a/indra/llui/lllineeditor.h b/indra/llui/lllineeditor.h
index 2518dbe3c7..71dd53f608 100644
--- a/indra/llui/lllineeditor.h
+++ b/indra/llui/lllineeditor.h
@@ -40,6 +40,7 @@
 #include "llframetimer.h"
 
 #include "lleditmenuhandler.h"
+#include "llspellcheckmenuhandler.h"
 #include "lluictrl.h"
 #include "lluiimage.h"
 #include "lluistring.h"
@@ -54,7 +55,7 @@ class LLButton;
 class LLContextMenu;
 
 class LLLineEditor
-: public LLUICtrl, public LLEditMenuHandler, protected LLPreeditor
+: public LLUICtrl, public LLEditMenuHandler, protected LLPreeditor, public LLSpellCheckMenuHandler
 {
 public:
 
@@ -86,6 +87,7 @@ public:
 
 		Optional<bool>					select_on_focus,
 										revert_on_esc,
+										spellcheck,
 										commit_on_focus_lost,
 										ignore_tab,
 										is_password;
@@ -146,6 +148,24 @@ public:
 	virtual void	deselect();
 	virtual BOOL	canDeselect() const;
 
+	// LLSpellCheckMenuHandler overrides
+	/*virtual*/ bool	getSpellCheck() const;
+
+	/*virtual*/ const std::string& getSuggestion(U32 index) const;
+	/*virtual*/ U32		getSuggestionCount() const;
+	/*virtual*/ void	replaceWithSuggestion(U32 index);
+
+	/*virtual*/ void	addToDictionary();
+	/*virtual*/ bool	canAddToDictionary() const;
+
+	/*virtual*/ void	addToIgnore();
+	/*virtual*/ bool	canAddToIgnore() const;
+
+	// Spell checking helper functions
+	std::string			getMisspelledWord(U32 pos) const;
+	bool				isMisspelledWord(U32 pos) const;
+	void				onSpellCheckSettingsChange();
+
 	// view overrides
 	virtual void	draw();
 	virtual void	reshape(S32 width,S32 height,BOOL called_from_parent=TRUE);
@@ -169,6 +189,9 @@ public:
 	virtual BOOL	setTextArg( const std::string& key, const LLStringExplicit& text );
 	virtual BOOL	setLabelArg( const std::string& key, const LLStringExplicit& text );
 
+	typedef boost::function<void(LLUIString&, S32&)> autoreplace_callback_t;
+	autoreplace_callback_t mAutoreplaceCallback;
+	void			setAutoreplaceCallback(autoreplace_callback_t cb) { mAutoreplaceCallback = cb; }
 	void			setLabel(const LLStringExplicit &new_label) { mLabel = new_label; }
 	const std::string& 	getLabel()	{ return mLabel.getString(); }
 
@@ -223,6 +246,7 @@ public:
 	void			setSelectAllonFocusReceived(BOOL b);
 	void			setSelectAllonCommit(BOOL b) { mSelectAllonCommit = b; }
 	
+	void			onKeystroke();
 	typedef boost::function<void (LLLineEditor* caller, void* user_data)> callback_t;
 	void			setKeystrokeCallback(callback_t callback, void* user_data);
 
@@ -322,6 +346,13 @@ protected:
 	S32			mLastSelectionStart;
 	S32			mLastSelectionEnd;
 
+	bool		mSpellCheck;
+	S32			mSpellCheckStart;
+	S32			mSpellCheckEnd;
+	LLTimer		mSpellCheckTimer;
+	std::list<std::pair<U32, U32> > mMisspellRanges;
+	std::vector<std::string>		mSuggestionList;
+
 	LLTextValidate::validate_func_t mPrevalidateFunc;
 	LLTextValidate::validate_func_t mPrevalidateInputFunc;
 
diff --git a/indra/llui/llmenugl.cpp b/indra/llui/llmenugl.cpp
index 32e5cdd556..5182a8cea1 100644
--- a/indra/llui/llmenugl.cpp
+++ b/indra/llui/llmenugl.cpp
@@ -3854,7 +3854,7 @@ void LLContextMenu::setVisible(BOOL visible)
 }
 
 // Takes cursor position in screen space?
-void LLContextMenu::show(S32 x, S32 y)
+void LLContextMenu::show(S32 x, S32 y, LLView* spawning_view)
 {
 	if (getChildList()->empty())
 	{
@@ -3908,6 +3908,14 @@ void LLContextMenu::show(S32 x, S32 y)
 	setRect(rect);
 	arrange();
 
+	if (spawning_view)
+	{
+		mSpawningViewHandle = spawning_view->getHandle();
+	}
+	else
+	{
+		mSpawningViewHandle.markDead();
+	}
 	LLView::setVisible(TRUE);
 }
 
diff --git a/indra/llui/llmenugl.h b/indra/llui/llmenugl.h
index c6ee5434b0..a9de3ef937 100644
--- a/indra/llui/llmenugl.h
+++ b/indra/llui/llmenugl.h
@@ -668,7 +668,7 @@ public:
 	// can't set visibility directly, must call show or hide
 	virtual void	setVisible			(BOOL visible);
 	
-	virtual void	show				(S32 x, S32 y);
+	virtual void	show				(S32 x, S32 y, LLView* spawning_view = NULL);
 	virtual void	hide				();
 
 	virtual BOOL	handleHover			( S32 x, S32 y, MASK mask );
@@ -681,10 +681,14 @@ public:
 
 			LLHandle<LLContextMenu> getHandle() { return getDerivedHandle<LLContextMenu>(); }
 
+			LLView*	getSpawningView() const		{ return mSpawningViewHandle.get(); }
+			void	setSpawningView(LLHandle<LLView> spawning_view) { mSpawningViewHandle = spawning_view; }
+
 protected:
 	BOOL						mHoveredAnyItem;
 	LLMenuItemGL*				mHoverItem;
 	LLRootHandle<LLContextMenu>	mHandle;
+	LLHandle<LLView>			mSpawningViewHandle;
 };
 
 
diff --git a/indra/llui/llmultifloater.cpp b/indra/llui/llmultifloater.cpp
index 6f0e691f10..e80799b16d 100644
--- a/indra/llui/llmultifloater.cpp
+++ b/indra/llui/llmultifloater.cpp
@@ -349,7 +349,7 @@ void LLMultiFloater::setVisible(BOOL visible)
 
 BOOL LLMultiFloater::handleKeyHere(KEY key, MASK mask)
 {
-	if (key == 'W' && mask == (MASK_CONTROL|MASK_SHIFT))
+	if (key == 'W' && mask == MASK_CONTROL)
 	{
 		LLFloater* floater = getActiveFloater();
 		// is user closeable and is system closeable
diff --git a/indra/llui/llnotifications.cpp b/indra/llui/llnotifications.cpp
index 7e1e2c3c9b..ed59c607a7 100644
--- a/indra/llui/llnotifications.cpp
+++ b/indra/llui/llnotifications.cpp
@@ -398,6 +398,7 @@ LLNotificationTemplate::LLNotificationTemplate(const LLNotificationTemplate::Par
 :	mName(p.name),
 	mType(p.type),
 	mMessage(p.value),
+	mFooter(p.footer.value),
 	mLabel(p.label),
 	mIcon(p.icon),
 	mURL(p.url.value),
@@ -852,6 +853,16 @@ std::string LLNotification::getMessage() const
 	return message;
 }
 
+std::string LLNotification::getFooter() const
+{
+	if (!mTemplatep)
+		return std::string();
+
+	std::string footer = mTemplatep->mFooter;
+	LLStringUtil::format(footer, mSubstitutions);
+	return footer;
+}
+
 std::string LLNotification::getLabel() const
 {
 	std::string label = mTemplatep->mLabel;
diff --git a/indra/llui/llnotifications.h b/indra/llui/llnotifications.h
index 12479f0788..19b30b8973 100644
--- a/indra/llui/llnotifications.h
+++ b/indra/llui/llnotifications.h
@@ -514,6 +514,7 @@ public:
 
 	std::string getType() const;
 	std::string getMessage() const;
+	std::string getFooter() const;
 	std::string getLabel() const;
 	std::string getURL() const;
 	S32 getURLOption() const;
diff --git a/indra/llui/llnotificationtemplate.h b/indra/llui/llnotificationtemplate.h
index ca9c4294c1..c9e9d0f32a 100644
--- a/indra/llui/llnotificationtemplate.h
+++ b/indra/llui/llnotificationtemplate.h
@@ -181,6 +181,17 @@ struct LLNotificationTemplate
 		{}
 	};
 
+	struct Footer : public LLInitParam::Block<Footer>
+	{
+		Mandatory<std::string> value;
+
+		Footer()
+		:	value("value")
+		{
+			addSynonym(value, "");
+		}
+	};
+
 	struct Params : public LLInitParam::Block<Params>
 	{
 		Mandatory<std::string>			name;
@@ -201,7 +212,8 @@ struct LLNotificationTemplate
 		Optional<FormRef>				form_ref;
 		Optional<ENotificationPriority, 
 			NotificationPriorityValues> priority;
-		Multiple<Tag>		tags;
+		Multiple<Tag>					tags;
+		Optional<Footer>				footer;
 
 
 		Params()
@@ -222,7 +234,8 @@ struct LLNotificationTemplate
 			url("url"),
 			unique("unique"),
 			form_ref(""),
-			tags("tag")
+			tags("tag"),
+			footer("footer")
 		{}
 
 	};
@@ -251,6 +264,8 @@ struct LLNotificationTemplate
     // The text used to display the notification. Replaceable parameters
     // are enclosed in square brackets like this [].
     std::string mMessage;
+    // The text used to display the notification, but under the form.
+    std::string mFooter;
 	// The label for the notification; used for 
 	// certain classes of notification (those with a window and a window title). 
 	// Also used when a notification pops up underneath the current one.
diff --git a/indra/llui/llscrollcontainer.cpp b/indra/llui/llscrollcontainer.cpp
index 9b7e30bb04..2fd187a526 100644
--- a/indra/llui/llscrollcontainer.cpp
+++ b/indra/llui/llscrollcontainer.cpp
@@ -389,12 +389,11 @@ void LLScrollContainer::calcVisibleSize( S32 *visible_width, S32 *visible_height
 		{
 			*show_h_scrollbar = TRUE;
 			*visible_height -= scrollbar_size;
-
+			// Note: Do *not* recompute *show_v_scrollbar here because with
 			// 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 && ((doc_height - *visible_height) > 1) )
 			{
 				*show_v_scrollbar = TRUE;
diff --git a/indra/llui/llsdparam.cpp b/indra/llui/llsdparam.cpp
deleted file mode 100644
index 54c8389772..0000000000
--- a/indra/llui/llsdparam.cpp
+++ /dev/null
@@ -1,341 +0,0 @@
-/** 
- * @file llsdparam.cpp
- * @brief parameter block abstraction for creating complex objects and 
- * parsing construction parameters from xml and LLSD
- *
- * $LicenseInfo:firstyear=2008&license=viewerlgpl$
- * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
- * 
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation;
- * version 2.1 of the License only.
- * 
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- * 
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- * 
- * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
- * $/LicenseInfo$
- */
-
-#include "linden_common.h"
-
-// Project includes
-#include "llsdparam.h"
-#include "llsdutil.h"
-
-static 	LLInitParam::Parser::parser_read_func_map_t sReadFuncs;
-static 	LLInitParam::Parser::parser_write_func_map_t sWriteFuncs;
-static 	LLInitParam::Parser::parser_inspect_func_map_t sInspectFuncs;
-static const LLSD NO_VALUE_MARKER;
-
-LLFastTimer::DeclareTimer FTM_SD_PARAM_ADAPTOR("LLSD to LLInitParam conversion");
-
-//
-// LLParamSDParser
-//
-LLParamSDParser::LLParamSDParser()
-: Parser(sReadFuncs, sWriteFuncs, sInspectFuncs)
-{
-	using boost::bind;
-
-	if (sReadFuncs.empty())
-	{
-		registerParserFuncs<LLInitParam::Flag>(readFlag, &LLParamSDParser::writeFlag);
-		registerParserFuncs<S32>(readS32, &LLParamSDParser::writeTypedValue<S32>);
-		registerParserFuncs<U32>(readU32, &LLParamSDParser::writeU32Param);
-		registerParserFuncs<F32>(readF32, &LLParamSDParser::writeTypedValue<F32>);
-		registerParserFuncs<F64>(readF64, &LLParamSDParser::writeTypedValue<F64>);
-		registerParserFuncs<bool>(readBool, &LLParamSDParser::writeTypedValue<bool>);
-		registerParserFuncs<std::string>(readString, &LLParamSDParser::writeTypedValue<std::string>);
-		registerParserFuncs<LLUUID>(readUUID, &LLParamSDParser::writeTypedValue<LLUUID>);
-		registerParserFuncs<LLDate>(readDate, &LLParamSDParser::writeTypedValue<LLDate>);
-		registerParserFuncs<LLURI>(readURI, &LLParamSDParser::writeTypedValue<LLURI>);
-		registerParserFuncs<LLSD>(readSD, &LLParamSDParser::writeTypedValue<LLSD>);
-	}
-}
-
-// special case handling of U32 due to ambiguous LLSD::assign overload
-bool LLParamSDParser::writeU32Param(LLParamSDParser::parser_t& parser, const void* val_ptr, parser_t::name_stack_t& name_stack)
-{
-	LLParamSDParser& sdparser = static_cast<LLParamSDParser&>(parser);
-	if (!sdparser.mWriteRootSD) return false;
-	
-	parser_t::name_stack_range_t range(name_stack.begin(), name_stack.end());
-	LLSD& sd_to_write = LLParamSDParserUtilities::getSDWriteNode(*sdparser.mWriteRootSD, range);
-	sd_to_write.assign((S32)*((const U32*)val_ptr));
-
-	return true;
-}
-
-bool LLParamSDParser::writeFlag(LLParamSDParser::parser_t& parser, const void* val_ptr, parser_t::name_stack_t& name_stack)
-{
-	LLParamSDParser& sdparser = static_cast<LLParamSDParser&>(parser);
-	if (!sdparser.mWriteRootSD) return false;
-
-	parser_t::name_stack_range_t range(name_stack.begin(), name_stack.end());
-	LLParamSDParserUtilities::getSDWriteNode(*sdparser.mWriteRootSD, range);
-
-	return true;
-}
-
-void LLParamSDParser::submit(LLInitParam::BaseBlock& block, const LLSD& sd, LLInitParam::Parser::name_stack_t& name_stack)
-{
-	mCurReadSD = &sd;
-	block.submitValue(name_stack, *this);
-}
-
-void LLParamSDParser::readSD(const LLSD& sd, LLInitParam::BaseBlock& block, bool silent)
-{
-	mCurReadSD = NULL;
-	mNameStack.clear();
-	setParseSilently(silent);
-
-	LLParamSDParserUtilities::readSDValues(boost::bind(&LLParamSDParser::submit, this, boost::ref(block), _1, _2), sd, mNameStack);
-	//readSDValues(sd, block);
-}
-
-void LLParamSDParser::writeSD(LLSD& sd, const LLInitParam::BaseBlock& block)
-{
-	mNameStack.clear();
-	mWriteRootSD = &sd;
-
-	name_stack_t name_stack;
-	block.serializeBlock(*this, name_stack);
-}
-
-/*virtual*/ std::string LLParamSDParser::getCurrentElementName()
-{
-	std::string full_name = "sd";
-	for (name_stack_t::iterator it = mNameStack.begin();	
-		it != mNameStack.end();
-		++it)
-	{
-		full_name += llformat("[%s]", it->first.c_str());
-	}
-
-	return full_name;
-}
-
-
-bool LLParamSDParser::readFlag(Parser& parser, void* val_ptr)
-{
-	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
-	return self.mCurReadSD == &NO_VALUE_MARKER;
-}
-
-
-bool LLParamSDParser::readS32(Parser& parser, void* val_ptr)
-{
-	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
-
-    *((S32*)val_ptr) = self.mCurReadSD->asInteger();
-    return true;
-}
-
-bool LLParamSDParser::readU32(Parser& parser, void* val_ptr)
-{
-	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
-
-    *((U32*)val_ptr) = self.mCurReadSD->asInteger();
-    return true;
-}
-
-bool LLParamSDParser::readF32(Parser& parser, void* val_ptr)
-{
-	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
-
-    *((F32*)val_ptr) = self.mCurReadSD->asReal();
-    return true;
-}
-
-bool LLParamSDParser::readF64(Parser& parser, void* val_ptr)
-{
-	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
-
-    *((F64*)val_ptr) = self.mCurReadSD->asReal();
-    return true;
-}
-
-bool LLParamSDParser::readBool(Parser& parser, void* val_ptr)
-{
-	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
-
-    *((bool*)val_ptr) = self.mCurReadSD->asBoolean();
-    return true;
-}
-
-bool LLParamSDParser::readString(Parser& parser, void* val_ptr)
-{
-	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
-
-	*((std::string*)val_ptr) = self.mCurReadSD->asString();
-    return true;
-}
-
-bool LLParamSDParser::readUUID(Parser& parser, void* val_ptr)
-{
-	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
-
-	*((LLUUID*)val_ptr) = self.mCurReadSD->asUUID();
-    return true;
-}
-
-bool LLParamSDParser::readDate(Parser& parser, void* val_ptr)
-{
-	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
-
-	*((LLDate*)val_ptr) = self.mCurReadSD->asDate();
-    return true;
-}
-
-bool LLParamSDParser::readURI(Parser& parser, void* val_ptr)
-{
-	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
-
-	*((LLURI*)val_ptr) = self.mCurReadSD->asURI();
-    return true;
-}
-
-bool LLParamSDParser::readSD(Parser& parser, void* val_ptr)
-{
-	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
-
-	*((LLSD*)val_ptr) = *self.mCurReadSD;
-    return true;
-}
-
-// static
-LLSD& LLParamSDParserUtilities::getSDWriteNode(LLSD& input, LLInitParam::Parser::name_stack_range_t& name_stack_range)
-{
-	LLSD* sd_to_write = &input;
-	
-	for (LLInitParam::Parser::name_stack_t::iterator it = name_stack_range.first;
-		it != name_stack_range.second;
-		++it)
-	{
-		bool new_traversal = it->second;
-
-		LLSD* child_sd;
-		if (it->first.empty())
-		{
-			child_sd = sd_to_write;
-			if (child_sd->isUndefined())
-			{
-				*child_sd = LLSD::emptyArray();
-			}
-			if (new_traversal)
-			{
-				// write to new element at end
-				sd_to_write = &(*child_sd)[child_sd->size()];
-			}
-			else
-			{
-				// write to last of existing elements, or first element if empty
-				sd_to_write = &(*child_sd)[llmax(0, child_sd->size() - 1)];
-			}
-		}
-		else
-		{
-			sd_to_write = &(*sd_to_write)[it->first];
-		}
-		it->second = false;
-	}
-	
-	return *sd_to_write;
-}
-
-//static
-void LLParamSDParserUtilities::readSDValues(read_sd_cb_t cb, const LLSD& sd, LLInitParam::Parser::name_stack_t& stack)
-{
-	if (sd.isMap())
-	{
-		for (LLSD::map_const_iterator it = sd.beginMap();
-			it != sd.endMap();
-			++it)
-		{
-			stack.push_back(make_pair(it->first, true));
-			readSDValues(cb, it->second, stack);
-			stack.pop_back();
-		}
-	}
-	else if (sd.isArray())
-	{
-		for (LLSD::array_const_iterator it = sd.beginArray();
-			it != sd.endArray();
-			++it)
-		{
-			stack.push_back(make_pair(std::string(), true));
-			readSDValues(cb, *it, stack);
-			stack.pop_back();
-		}
-	}
-	else if (sd.isUndefined())
-	{
-		if (!cb.empty())
-		{
-			cb(NO_VALUE_MARKER, stack);
-		}
-	}
-	else
-	{
-		if (!cb.empty())
-		{
-			cb(sd, stack);
-		}
-	}
-}
-
-//static
-void LLParamSDParserUtilities::readSDValues(read_sd_cb_t cb, const LLSD& sd)
-{
-	LLInitParam::Parser::name_stack_t stack = LLInitParam::Parser::name_stack_t();
-	readSDValues(cb, sd, stack);
-}
-namespace LLInitParam
-{
-	// LLSD specialization
-	// block param interface
-	bool ParamValue<LLSD, NOT_BLOCK>::deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack, bool new_name)
-	{
-		if (name_stack.first == name_stack.second
-			&& p.readValue<LLSD>(mValue))
-		{
-			return true;
-		}
-
-		LLSD& sd = LLParamSDParserUtilities::getSDWriteNode(mValue, name_stack);
-
-		LLSD::String string;
-
-		if (p.readValue<LLSD::String>(string))
-		{
-			sd = string;
-			return true;
-		}
-		return false;
-	}
-
-	//static
-	void ParamValue<LLSD, NOT_BLOCK>::serializeElement(Parser& p, const LLSD& sd, Parser::name_stack_t& name_stack)
-	{
-		p.writeValue<LLSD::String>(sd.asString(), name_stack);
-	}
-
-	void ParamValue<LLSD, NOT_BLOCK>::serializeBlock(Parser& p, Parser::name_stack_t& name_stack, const BaseBlock* diff_block) const
-	{
-		// attempt to write LLSD out directly
-		if (!p.writeValue<LLSD>(mValue, name_stack))
-		{
-			// otherwise read from LLSD value and serialize out to parser (which could be LLSD, XUI, etc)
-			LLParamSDParserUtilities::readSDValues(boost::bind(&serializeElement, boost::ref(p), _1, _2), mValue, name_stack);
-		}
-	}
-}
diff --git a/indra/llui/llsdparam.h b/indra/llui/llsdparam.h
deleted file mode 100644
index 3dfc6d020e..0000000000
--- a/indra/llui/llsdparam.h
+++ /dev/null
@@ -1,126 +0,0 @@
-/** 
- * @file llsdparam.h
- * @brief parameter block abstraction for creating complex objects and 
- * parsing construction parameters from xml and LLSD
- *
- * $LicenseInfo:firstyear=2008&license=viewerlgpl$
- * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
- * 
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation;
- * version 2.1 of the License only.
- * 
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- * 
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- * 
- * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
- * $/LicenseInfo$
- */
-
-#ifndef LL_LLSDPARAM_H
-#define LL_LLSDPARAM_H
-
-#include "llinitparam.h"
-#include "boost/function.hpp"
-
-struct LLParamSDParserUtilities
-{
-	static LLSD& getSDWriteNode(LLSD& input, LLInitParam::Parser::name_stack_range_t& name_stack_range);
-
-	typedef boost::function<void (const LLSD&, LLInitParam::Parser::name_stack_t&)> read_sd_cb_t;
-	static void readSDValues(read_sd_cb_t cb, const LLSD& sd, LLInitParam::Parser::name_stack_t& stack);
-	static void readSDValues(read_sd_cb_t cb, const LLSD& sd);
-};
-
-class LLParamSDParser 
-:	public LLInitParam::Parser
-{
-LOG_CLASS(LLParamSDParser);
-
-typedef LLInitParam::Parser parser_t;
-
-public:
-	LLParamSDParser();
-	void readSD(const LLSD& sd, LLInitParam::BaseBlock& block, bool silent = false);
-	void writeSD(LLSD& sd, const LLInitParam::BaseBlock& block);
-
-	/*virtual*/ std::string getCurrentElementName();
-
-private:
-	void submit(LLInitParam::BaseBlock& block, const LLSD& sd, LLInitParam::Parser::name_stack_t& name_stack);
-
-	template<typename T>
-	static bool writeTypedValue(Parser& parser, const void* val_ptr, parser_t::name_stack_t& name_stack)
-	{
-		LLParamSDParser& sdparser = static_cast<LLParamSDParser&>(parser);
-		if (!sdparser.mWriteRootSD) return false;
-		
-		LLInitParam::Parser::name_stack_range_t range(name_stack.begin(), name_stack.end());
-		LLSD& sd_to_write = LLParamSDParserUtilities::getSDWriteNode(*sdparser.mWriteRootSD, range);
-
-		sd_to_write.assign(*((const T*)val_ptr));
-		return true;
-	}
-
-	static bool writeU32Param(Parser& parser, const void* value_ptr, parser_t::name_stack_t& name_stack);
-	static bool writeFlag(Parser& parser, const void* value_ptr, parser_t::name_stack_t& name_stack);
-
-	static bool readFlag(Parser& parser, void* val_ptr);
-	static bool readS32(Parser& parser, void* val_ptr);
-	static bool readU32(Parser& parser, void* val_ptr);
-	static bool readF32(Parser& parser, void* val_ptr);
-	static bool readF64(Parser& parser, void* val_ptr);
-	static bool readBool(Parser& parser, void* val_ptr);
-	static bool readString(Parser& parser, void* val_ptr);
-	static bool readUUID(Parser& parser, void* val_ptr);
-	static bool readDate(Parser& parser, void* val_ptr);
-	static bool readURI(Parser& parser, void* val_ptr);
-	static bool readSD(Parser& parser, void* val_ptr);
-
-	Parser::name_stack_t	mNameStack;
-	const LLSD*				mCurReadSD;
-	LLSD*					mWriteRootSD;
-	LLSD*					mCurWriteSD;
-};
-
-
-extern LLFastTimer::DeclareTimer FTM_SD_PARAM_ADAPTOR;
-template<typename T>
-class LLSDParamAdapter : public T
-{
-public:
-	LLSDParamAdapter() {}
-	LLSDParamAdapter(const LLSD& sd)
-	{
-		LLFastTimer _(FTM_SD_PARAM_ADAPTOR);
-		LLParamSDParser parser;
-		// don't spam for implicit parsing of LLSD, as we want to allow arbitrary freeform data and ignore most of it
-		bool parse_silently = true;
-		parser.readSD(sd, *this, parse_silently);
-	}
-
-	operator LLSD() const
-	{
-		LLParamSDParser parser;
-		LLSD sd;
-		parser.writeSD(sd, *this);
-		return sd;
-	}
-		
-	LLSDParamAdapter(const T& val)
-	: T(val)
-	{
-		T::operator=(val);
-	}
-};
-
-#endif // LL_LLSDPARAM_H
-
diff --git a/indra/llui/llspellcheck.cpp b/indra/llui/llspellcheck.cpp
new file mode 100644
index 0000000000..a189375fbe
--- /dev/null
+++ b/indra/llui/llspellcheck.cpp
@@ -0,0 +1,505 @@
+/** 
+ * @file llspellcheck.cpp
+ * @brief Spell checking functionality
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "lldir.h"
+#include "llsdserialize.h"
+
+#include "llspellcheck.h"
+#if LL_WINDOWS
+	#include <hunspell/hunspelldll.h>
+	#pragma comment(lib, "libhunspell.lib")
+#else
+	#include <hunspell/hunspell.hxx>
+#endif
+
+static const std::string DICT_DIR = "dictionaries";
+static const std::string DICT_FILE_CUSTOM = "user_custom.dic";
+static const std::string DICT_FILE_IGNORE = "user_ignore.dic";
+
+static const std::string DICT_FILE_MAIN = "dictionaries.xml";
+static const std::string DICT_FILE_USER = "user_dictionaries.xml";
+
+LLSD LLSpellChecker::sDictMap;
+LLSpellChecker::settings_change_signal_t LLSpellChecker::sSettingsChangeSignal;
+
+LLSpellChecker::LLSpellChecker()
+	: mHunspell(NULL)
+{
+	// Load initial dictionary information
+	refreshDictionaryMap();
+}
+
+LLSpellChecker::~LLSpellChecker()
+{
+	delete mHunspell;
+}
+
+bool LLSpellChecker::checkSpelling(const std::string& word) const
+{
+	if ( (!mHunspell) || (word.length() < 3) || (0 != mHunspell->spell(word.c_str())) )
+	{
+		return true;
+	}
+	if (mIgnoreList.size() > 0)
+	{
+		std::string word_lower(word);
+		LLStringUtil::toLower(word_lower);
+		return (mIgnoreList.end() != std::find(mIgnoreList.begin(), mIgnoreList.end(), word_lower));
+	}
+	return false;
+}
+
+S32 LLSpellChecker::getSuggestions(const std::string& word, std::vector<std::string>& suggestions) const
+{
+	suggestions.clear();
+	if ( (!mHunspell) || (word.length() < 3) )
+	{
+		return 0;
+	}
+
+	char** suggestion_list; int suggestion_cnt = 0;
+	if ( (suggestion_cnt = mHunspell->suggest(&suggestion_list, word.c_str())) != 0 )
+	{
+		for (int suggestion_index = 0; suggestion_index < suggestion_cnt; suggestion_index++)
+		{
+			suggestions.push_back(suggestion_list[suggestion_index]);
+		}
+		mHunspell->free_list(&suggestion_list, suggestion_cnt);	
+	}
+	return suggestions.size();
+}
+
+// static
+const LLSD LLSpellChecker::getDictionaryData(const std::string& dict_language)
+{
+	for (LLSD::array_const_iterator it = sDictMap.beginArray(); it != sDictMap.endArray(); ++it)
+	{
+		const LLSD& dict_entry = *it;
+		if (dict_language == dict_entry["language"].asString())
+		{
+			return dict_entry;
+		}
+	}
+	return LLSD();
+}
+
+// static
+bool LLSpellChecker::hasDictionary(const std::string& dict_language, bool check_installed)
+{
+	const LLSD dict_info = getDictionaryData(dict_language);
+	return dict_info.has("language") && ( (!check_installed) || (dict_info["installed"].asBoolean()) );
+}
+
+// static
+void LLSpellChecker::setDictionaryData(const LLSD& dict_info)
+{
+	const std::string dict_language = dict_info["language"].asString();
+	if (dict_language.empty())
+	{
+		return;
+	}
+
+	for (LLSD::array_iterator it = sDictMap.beginArray(); it != sDictMap.endArray(); ++it)
+	{
+		LLSD& dict_entry = *it;
+		if (dict_language == dict_entry["language"].asString())
+		{
+			dict_entry = dict_info;
+			return;
+		}
+	}
+	sDictMap.append(dict_info);
+	return;
+}
+
+// static
+void LLSpellChecker::refreshDictionaryMap()
+{
+	const std::string app_path = getDictionaryAppPath();
+	const std::string user_path = getDictionaryUserPath();
+
+	// Load dictionary information (file name, friendly name, ...)
+	llifstream user_file(user_path + DICT_FILE_MAIN, std::ios::binary);
+	if ( (!user_file.is_open()) || (0 == LLSDSerialize::fromXMLDocument(sDictMap, user_file)) || (0 == sDictMap.size()) )
+	{
+		llifstream app_file(app_path + DICT_FILE_MAIN, std::ios::binary);
+		if ( (!app_file.is_open()) || (0 == LLSDSerialize::fromXMLDocument(sDictMap, app_file)) || (0 == sDictMap.size()) )
+		{
+			return;
+		}
+	}
+
+	// Load user installed dictionary information
+	llifstream custom_file(user_path + DICT_FILE_USER, std::ios::binary);
+	if (custom_file.is_open())
+	{
+		LLSD custom_dict_map;
+		LLSDSerialize::fromXMLDocument(custom_dict_map, custom_file);
+		for (LLSD::array_iterator it = custom_dict_map.beginArray(); it != custom_dict_map.endArray(); ++it)
+		{
+			LLSD& dict_info = *it;
+			dict_info["user_installed"] = true;
+			setDictionaryData(dict_info);
+		}
+		custom_file.close();
+	}
+
+	// Look for installed dictionaries
+	std::string tmp_app_path, tmp_user_path;
+	for (LLSD::array_iterator it = sDictMap.beginArray(); it != sDictMap.endArray(); ++it)
+	{
+		LLSD& sdDict = *it;
+		tmp_app_path = (sdDict.has("name")) ? app_path + sdDict["name"].asString() : LLStringUtil::null;
+		tmp_user_path = (sdDict.has("name")) ? user_path + sdDict["name"].asString() : LLStringUtil::null;
+		sdDict["installed"] = 
+			(!tmp_app_path.empty()) && ((gDirUtilp->fileExists(tmp_user_path + ".dic")) || (gDirUtilp->fileExists(tmp_app_path + ".dic")));
+	}
+
+	sSettingsChangeSignal();
+}
+
+void LLSpellChecker::addToCustomDictionary(const std::string& word)
+{
+	if (mHunspell)
+	{
+		mHunspell->add(word.c_str());
+	}
+	addToDictFile(getDictionaryUserPath() + DICT_FILE_CUSTOM, word);
+	sSettingsChangeSignal();
+}
+
+void LLSpellChecker::addToIgnoreList(const std::string& word)
+{
+	std::string word_lower(word);
+	LLStringUtil::toLower(word_lower);
+	if (mIgnoreList.end() == std::find(mIgnoreList.begin(), mIgnoreList.end(), word_lower))
+	{
+		mIgnoreList.push_back(word_lower);
+		addToDictFile(getDictionaryUserPath() + DICT_FILE_IGNORE, word_lower);
+		sSettingsChangeSignal();
+	}
+}
+
+void LLSpellChecker::addToDictFile(const std::string& dict_path, const std::string& word)
+{
+	std::vector<std::string> word_list;
+
+	if (gDirUtilp->fileExists(dict_path))
+	{
+		llifstream file_in(dict_path, std::ios::in);
+		if (file_in.is_open())
+		{
+			std::string word; int line_num = 0;
+			while (getline(file_in, word))
+			{
+				// Skip over the first line since that's just a line count
+				if (0 != line_num)
+				{
+					word_list.push_back(word);
+				}
+				line_num++;
+			}
+		}
+		else
+		{
+			// TODO: show error message?
+			return;
+		}
+	}
+
+	word_list.push_back(word);
+
+	llofstream file_out(dict_path, std::ios::out | std::ios::trunc);	
+	if (file_out.is_open())
+	{
+		file_out << word_list.size() << std::endl;
+		for (std::vector<std::string>::const_iterator itWord = word_list.begin(); itWord != word_list.end(); ++itWord)
+		{
+			file_out << *itWord << std::endl;
+		}
+		file_out.close();
+	}
+}
+
+bool LLSpellChecker::isActiveDictionary(const std::string& dict_language) const
+{
+	return
+		(mDictLanguage == dict_language) || 
+		(mDictSecondary.end() != std::find(mDictSecondary.begin(), mDictSecondary.end(), dict_language));
+}
+
+void LLSpellChecker::setSecondaryDictionaries(dict_list_t dict_list)
+{
+	if (!getUseSpellCheck())
+	{
+		return;
+	}
+
+	// Check if we're only adding secondary dictionaries, or removing them
+	dict_list_t dict_add(llmax(dict_list.size(), mDictSecondary.size())), dict_rem(llmax(dict_list.size(), mDictSecondary.size()));
+	dict_list.sort();
+	mDictSecondary.sort();
+	dict_list_t::iterator end_added = std::set_difference(dict_list.begin(), dict_list.end(), mDictSecondary.begin(), mDictSecondary.end(), dict_add.begin());
+	dict_list_t::iterator end_removed = std::set_difference(mDictSecondary.begin(), mDictSecondary.end(), dict_list.begin(), dict_list.end(), dict_rem.begin());
+
+	if (end_removed != dict_rem.begin())		// We can't remove secondary dictionaries so we need to recreate the Hunspell instance
+	{
+		mDictSecondary = dict_list;
+
+		std::string dict_language = mDictLanguage;
+		initHunspell(dict_language);
+	}
+	else if (end_added != dict_add.begin())		// Add the new secondary dictionaries one by one
+	{
+		const std::string app_path = getDictionaryAppPath();
+		const std::string user_path = getDictionaryUserPath();
+		for (dict_list_t::const_iterator it_added = dict_add.begin(); it_added != end_added; ++it_added)
+		{
+			const LLSD dict_entry = getDictionaryData(*it_added);
+			if ( (!dict_entry.isDefined()) || (!dict_entry["installed"].asBoolean()) )
+			{
+				continue;
+			}
+
+			const std::string strFileDic = dict_entry["name"].asString() + ".dic";
+			if (gDirUtilp->fileExists(user_path + strFileDic))
+			{
+				mHunspell->add_dic((user_path + strFileDic).c_str());
+			}
+			else if (gDirUtilp->fileExists(app_path + strFileDic))
+			{
+				mHunspell->add_dic((app_path + strFileDic).c_str());
+			}
+		}
+		mDictSecondary = dict_list;
+		sSettingsChangeSignal();
+	}
+}
+
+void LLSpellChecker::initHunspell(const std::string& dict_language)
+{
+	if (mHunspell)
+	{
+		delete mHunspell;
+		mHunspell = NULL;
+		mDictLanguage.clear();
+		mDictFile.clear();
+		mIgnoreList.clear();
+	}
+
+	const LLSD dict_entry = (!dict_language.empty()) ? getDictionaryData(dict_language) : LLSD();
+	if ( (!dict_entry.isDefined()) || (!dict_entry["installed"].asBoolean()) || (!dict_entry["is_primary"].asBoolean()))
+	{
+		sSettingsChangeSignal();
+		return;
+	}
+
+	const std::string app_path = getDictionaryAppPath();
+	const std::string user_path = getDictionaryUserPath();
+	if (dict_entry.has("name"))
+	{
+		const std::string filename_aff = dict_entry["name"].asString() + ".aff";
+		const std::string filename_dic = dict_entry["name"].asString() + ".dic";
+		if ( (gDirUtilp->fileExists(user_path + filename_aff)) && (gDirUtilp->fileExists(user_path + filename_dic)) )
+		{
+			mHunspell = new Hunspell((user_path + filename_aff).c_str(), (user_path + filename_dic).c_str());
+		}
+		else if ( (gDirUtilp->fileExists(app_path + filename_aff)) && (gDirUtilp->fileExists(app_path + filename_dic)) )
+		{
+			mHunspell = new Hunspell((app_path + filename_aff).c_str(), (app_path + filename_dic).c_str());
+		}
+		if (!mHunspell)
+		{
+			return;
+		}
+
+		mDictLanguage = dict_language;
+		mDictFile = dict_entry["name"].asString();
+
+		if (gDirUtilp->fileExists(user_path + DICT_FILE_CUSTOM))
+		{
+			mHunspell->add_dic((user_path + DICT_FILE_CUSTOM).c_str());
+		}
+
+		if (gDirUtilp->fileExists(user_path + DICT_FILE_IGNORE))
+		{
+			llifstream file_in(user_path + DICT_FILE_IGNORE, std::ios::in);
+			if (file_in.is_open())
+			{
+				std::string word; int idxLine = 0;
+				while (getline(file_in, word))
+				{
+					// Skip over the first line since that's just a line count
+					if (0 != idxLine)
+					{
+						LLStringUtil::toLower(word);
+						mIgnoreList.push_back(word);
+					}
+					idxLine++;
+				}
+			}
+		}
+
+		for (dict_list_t::const_iterator it = mDictSecondary.begin(); it != mDictSecondary.end(); ++it)
+		{
+			const LLSD dict_entry = getDictionaryData(*it);
+			if ( (!dict_entry.isDefined()) || (!dict_entry["installed"].asBoolean()) )
+			{
+				continue;
+			}
+
+			const std::string filename_dic = dict_entry["name"].asString() + ".dic";
+			if (gDirUtilp->fileExists(user_path + filename_dic))
+			{
+				mHunspell->add_dic((user_path + filename_dic).c_str());
+			}
+			else if (gDirUtilp->fileExists(app_path + filename_dic))
+			{
+				mHunspell->add_dic((app_path + filename_dic).c_str());
+			}
+		}
+	}
+
+	sSettingsChangeSignal();
+}
+
+// static
+const std::string LLSpellChecker::getDictionaryAppPath()
+{
+	std::string dict_path = gDirUtilp->getExpandedFilename(LL_PATH_APP_SETTINGS, DICT_DIR, "");
+	return dict_path;
+}
+
+// static
+const std::string LLSpellChecker::getDictionaryUserPath()
+{
+	std::string dict_path = gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, DICT_DIR, "");
+	if (!gDirUtilp->fileExists(dict_path))
+	{
+		LLFile::mkdir(dict_path);
+	}
+	return dict_path;
+}
+
+// static
+bool LLSpellChecker::getUseSpellCheck()
+{
+	return (LLSpellChecker::instanceExists()) && (LLSpellChecker::instance().mHunspell);
+}
+
+// static
+bool LLSpellChecker::canRemoveDictionary(const std::string& dict_language)
+{
+	// Only user-installed inactive dictionaries can be removed
+	const LLSD dict_info = getDictionaryData(dict_language);
+	return 
+		(dict_info["user_installed"].asBoolean()) && 
+		( (!getUseSpellCheck()) || (!LLSpellChecker::instance().isActiveDictionary(dict_language)) );
+}
+
+// static
+void LLSpellChecker::removeDictionary(const std::string& dict_language)
+{
+	if (!canRemoveDictionary(dict_language))
+	{
+		return;
+	}
+
+	LLSD dict_map = loadUserDictionaryMap();
+	for (LLSD::array_const_iterator it = dict_map.beginArray(); it != dict_map.endArray(); ++it)
+	{
+		const LLSD& dict_info = *it;
+		if (dict_info["language"].asString() == dict_language)
+		{
+			const std::string dict_dic = getDictionaryUserPath() + dict_info["name"].asString() + ".dic";
+			if (gDirUtilp->fileExists(dict_dic))
+			{
+				LLFile::remove(dict_dic);
+			}
+			const std::string dict_aff = getDictionaryUserPath() + dict_info["name"].asString() + ".aff";
+			if (gDirUtilp->fileExists(dict_aff))
+			{
+				LLFile::remove(dict_aff);
+			}
+			dict_map.erase(it - dict_map.beginArray());
+			break;
+		}
+	}
+	saveUserDictionaryMap(dict_map);
+
+	refreshDictionaryMap();
+}
+
+// static
+LLSD LLSpellChecker::loadUserDictionaryMap()
+{
+	LLSD dict_map;
+	llifstream dict_file(getDictionaryUserPath() + DICT_FILE_USER, std::ios::binary);
+	if (dict_file.is_open())
+	{
+		LLSDSerialize::fromXMLDocument(dict_map, dict_file);
+		dict_file.close();
+	}
+	return dict_map;
+}
+
+// static
+void LLSpellChecker::saveUserDictionaryMap(const LLSD& dict_map)
+{
+	llofstream dict_file(getDictionaryUserPath() + DICT_FILE_USER, std::ios::trunc);
+	if (dict_file.is_open())
+	{
+		LLSDSerialize::toPrettyXML(dict_map, dict_file);
+		dict_file.close();
+	}
+}
+
+// static
+boost::signals2::connection LLSpellChecker::setSettingsChangeCallback(const settings_change_signal_t::slot_type& cb)
+{
+	return sSettingsChangeSignal.connect(cb);
+}
+
+// static
+void LLSpellChecker::setUseSpellCheck(const std::string& dict_language)
+{
+	if ( (((dict_language.empty()) && (getUseSpellCheck())) || (!dict_language.empty())) && 
+		 (LLSpellChecker::instance().mDictLanguage != dict_language) )
+	{
+		LLSpellChecker::instance().initHunspell(dict_language);
+	}
+}
+
+// static
+void LLSpellChecker::initClass()
+{
+	if (sDictMap.isUndefined())
+	{
+		refreshDictionaryMap();
+	}
+}
diff --git a/indra/llui/llspellcheck.h b/indra/llui/llspellcheck.h
new file mode 100644
index 0000000000..4ab80195ea
--- /dev/null
+++ b/indra/llui/llspellcheck.h
@@ -0,0 +1,93 @@
+/** 
+ * @file llspellcheck.h
+ * @brief Spell checking functionality
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LLSPELLCHECK_H
+#define LLSPELLCHECK_H
+
+#include "llsingleton.h"
+#include "llui.h"
+#include <boost/signals2.hpp>
+
+class Hunspell;
+
+class LLSpellChecker : public LLSingleton<LLSpellChecker>, public LLInitClass<LLSpellChecker>
+{
+	friend class LLSingleton<LLSpellChecker>;
+	friend class LLInitClass<LLSpellChecker>;
+protected:
+	LLSpellChecker();
+	~LLSpellChecker();
+
+public:
+	void addToCustomDictionary(const std::string& word);
+	void addToIgnoreList(const std::string& word);
+	bool checkSpelling(const std::string& word) const;
+	S32  getSuggestions(const std::string& word, std::vector<std::string>& suggestions) const;
+protected:
+	void addToDictFile(const std::string& dict_path, const std::string& word);
+	void initHunspell(const std::string& dict_language);
+
+public:
+	typedef std::list<std::string> dict_list_t;
+
+	const std::string&	getPrimaryDictionary() const { return mDictLanguage; }
+	const dict_list_t&	getSecondaryDictionaries() const { return mDictSecondary; }
+	bool				isActiveDictionary(const std::string& dict_language) const;
+	void				setSecondaryDictionaries(dict_list_t dict_list);
+
+	static bool				 canRemoveDictionary(const std::string& dict_language);
+	static const std::string getDictionaryAppPath();
+	static const std::string getDictionaryUserPath();
+	static const LLSD		 getDictionaryData(const std::string& dict_language);
+	static const LLSD&		 getDictionaryMap() { return sDictMap; }
+	static bool				 getUseSpellCheck();
+	static bool				 hasDictionary(const std::string& dict_language, bool check_installed = false);
+	static void				 refreshDictionaryMap();
+	static void				 removeDictionary(const std::string& dict_language);
+	static void				 setUseSpellCheck(const std::string& dict_language);
+protected:
+	static LLSD				 loadUserDictionaryMap();
+	static void				 setDictionaryData(const LLSD& dict_info);
+	static void				 saveUserDictionaryMap(const LLSD& dict_map);
+
+public:
+	typedef boost::signals2::signal<void()> settings_change_signal_t;
+	static boost::signals2::connection setSettingsChangeCallback(const settings_change_signal_t::slot_type& cb);
+protected:
+	static void initClass();
+
+protected:
+	Hunspell*	mHunspell;
+	std::string	mDictLanguage;
+	std::string	mDictFile;
+	dict_list_t	mDictSecondary;
+	std::vector<std::string> mIgnoreList;
+
+	static LLSD						sDictMap;
+	static settings_change_signal_t	sSettingsChangeSignal;
+};
+
+#endif // LLSPELLCHECK_H
diff --git a/indra/llui/llspellcheckmenuhandler.h b/indra/llui/llspellcheckmenuhandler.h
new file mode 100644
index 0000000000..d5c95bad39
--- /dev/null
+++ b/indra/llui/llspellcheckmenuhandler.h
@@ -0,0 +1,46 @@
+/** 
+ * @file llspellcheckmenuhandler.h
+ * @brief Interface used by spell check menu handling
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LLSPELLCHECKMENUHANDLER_H
+#define LLSPELLCHECKMENUHANDLER_H
+
+class LLSpellCheckMenuHandler
+{
+public:
+	virtual bool	getSpellCheck() const			{ return false; }
+
+	virtual const std::string& getSuggestion(U32 index) const	{ return LLStringUtil::null; }
+	virtual U32		getSuggestionCount() const		{ return 0; }
+	virtual void	replaceWithSuggestion(U32 index){}
+
+	virtual void	addToDictionary()				{}
+	virtual bool	canAddToDictionary() const		{ return false; }
+
+	virtual void	addToIgnore()					{}
+	virtual bool	canAddToIgnore() const			{ return false; }
+};
+
+#endif // LLSPELLCHECKMENUHANDLER_H
diff --git a/indra/llui/llstatbar.cpp b/indra/llui/llstatbar.cpp
index ec4db14790..04cce7878e 100644
--- a/indra/llui/llstatbar.cpp
+++ b/indra/llui/llstatbar.cpp
@@ -272,7 +272,7 @@ LLRect LLStatBar::getRequiredRect()
 	{
 		if (mDisplayHistory)
 		{
-			rect.mTop = 67;
+			rect.mTop = 35 + mStatp->getNumBins();
 		}
 		else
 		{
diff --git a/indra/llui/lltextbase.cpp b/indra/llui/lltextbase.cpp
index a7bc6bbb77..98624f42b9 100644
--- a/indra/llui/lltextbase.cpp
+++ b/indra/llui/lltextbase.cpp
@@ -32,6 +32,7 @@
 #include "lllocalcliprect.h"
 #include "llmenugl.h"
 #include "llscrollcontainer.h"
+#include "llspellcheck.h"
 #include "llstl.h"
 #include "lltextparser.h"
 #include "lltextutil.h"
@@ -156,6 +157,7 @@ LLTextBase::Params::Params()
 	plain_text("plain_text",false),
 	track_end("track_end", false),
 	read_only("read_only", false),
+	spellcheck("spellcheck", false),
 	v_pad("v_pad", 0),
 	h_pad("h_pad", 0),
 	clip("clip", true),
@@ -182,6 +184,9 @@ LLTextBase::LLTextBase(const LLTextBase::Params &p)
 	mFontShadow(p.font_shadow),
 	mPopupMenu(NULL),
 	mReadOnly(p.read_only),
+	mSpellCheck(p.spellcheck),
+	mSpellCheckStart(-1),
+	mSpellCheckEnd(-1),
 	mCursorColor(p.cursor_color),
 	mFgColor(p.text_color),
 	mBorderVisible( p.border_visible ),
@@ -248,6 +253,12 @@ LLTextBase::LLTextBase(const LLTextBase::Params &p)
 		addChild(mDocumentView);
 	}
 
+	if (mSpellCheck)
+	{
+		LLSpellChecker::setSettingsChangeCallback(boost::bind(&LLTextBase::onSpellCheckSettingsChange, this));
+	}
+	mSpellCheckTimer.reset();
+
 	createDefaultSegment();
 
 	updateRects();
@@ -282,12 +293,23 @@ bool LLTextBase::truncate()
 	if (getLength() >= S32(mMaxTextByteLength / 4))
 	{	
 		// Have to check actual byte size
-		LLWString text(getWText());
-		S32 utf8_byte_size = wstring_utf8_length(text);
+		S32 utf8_byte_size = 0;
+		LLSD value = getViewModel()->getValue();
+		if (value.type() == LLSD::TypeString)
+		{
+			// save a copy for strings.
+			utf8_byte_size = value.size();
+		}
+		else
+		{
+			// non string LLSDs need explicit conversion to string
+			utf8_byte_size = value.asString().size();
+		}
+
 		if ( utf8_byte_size > mMaxTextByteLength )
 		{
 			// Truncate safely in UTF-8
-			std::string temp_utf8_text = wstring_to_utf8str(text);
+			std::string temp_utf8_text = value.asString();
 			temp_utf8_text = utf8str_truncate( temp_utf8_text, mMaxTextByteLength );
 			LLWString text = utf8str_to_wstring( temp_utf8_text );
 			// remove extra bit of current string, to preserve formatting, etc.
@@ -538,8 +560,92 @@ void LLTextBase::drawText()
 		return;
 	}
 
+	// Perform spell check if needed
+	if ( (getSpellCheck()) && (getWText().length() > 2) )
+	{
+		// Calculate start and end indices for the spell checking range
+		S32 start = line_start, end = getLineEnd(last_line);
+
+		if ( (mSpellCheckStart != start) || (mSpellCheckEnd != end) )
+		{
+			const LLWString& wstrText = getWText(); 
+			mMisspellRanges.clear();
+
+			segment_set_t::const_iterator seg_it = getSegIterContaining(start);
+			while (mSegments.end() != seg_it)
+			{
+				LLTextSegmentPtr text_segment = *seg_it;
+				if ( (text_segment.isNull()) || (text_segment->getStart() >= end) )
+				{
+					break;
+				}
+
+				if (!text_segment->canEdit())
+				{
+					++seg_it;
+					continue;
+				}
+
+				// Combine adjoining text segments into one
+				U32 seg_start = text_segment->getStart(), seg_end = llmin(text_segment->getEnd(), end);
+				while (mSegments.end() != ++seg_it)
+				{
+					text_segment = *seg_it;
+					if ( (text_segment.isNull()) || (!text_segment->canEdit()) || (text_segment->getStart() >= end) )
+					{
+						break;
+					}
+					seg_end = llmin(text_segment->getEnd(), end);
+				}
+
+				// Find the start of the first word
+				U32 word_start = seg_start, word_end = -1;
+				while ( (word_start < wstrText.length()) && (!LLStringOps::isAlpha(wstrText[word_start])) )
+				{
+					word_start++;
+				}
+
+				// Iterate over all words in the text block and check them one by one
+				while (word_start < seg_end)
+				{
+					// Find the end of the current word (special case handling for "'" when it's used as a contraction)
+					word_end = word_start + 1;
+					while ( (word_end < seg_end) && 
+							((LLWStringUtil::isPartOfWord(wstrText[word_end])) ||
+								((L'\'' == wstrText[word_end]) && 
+								(LLStringOps::isAlnum(wstrText[word_end - 1])) && (LLStringOps::isAlnum(wstrText[word_end + 1])))) )
+					{
+						word_end++;
+					}
+					if (word_end > seg_end)
+					{
+						break;
+					}
+
+					// Don't process words shorter than 3 characters
+					std::string word = wstring_to_utf8str(wstrText.substr(word_start, word_end - word_start));
+					if ( (word.length() >= 3) && (!LLSpellChecker::instance().checkSpelling(word)) )
+					{
+						mMisspellRanges.push_back(std::pair<U32, U32>(word_start, word_end));
+					}
+
+					// Find the start of the next word
+					word_start = word_end + 1;
+					while ( (word_start < seg_end) && (!LLWStringUtil::isPartOfWord(wstrText[word_start])) )
+					{
+						word_start++;
+					}
+				}
+			}
+
+			mSpellCheckStart = start;
+			mSpellCheckEnd = end;
+		}
+	}
+
 	LLTextSegmentPtr cur_segment = *seg_iter;
 
+	std::list<std::pair<U32, U32> >::const_iterator misspell_it = std::lower_bound(mMisspellRanges.begin(), mMisspellRanges.end(), std::pair<U32, U32>(line_start, 0));
 	for (S32 cur_line = first_line; cur_line < last_line; cur_line++)
 	{
 		S32 next_line = cur_line + 1;
@@ -574,7 +680,8 @@ void LLTextBase::drawText()
 				cur_segment = *seg_iter;
 			}
 			
-			S32 clipped_end	=	llmin( line_end, cur_segment->getEnd() )  - cur_segment->getStart();
+			S32 seg_end = llmin(line_end, cur_segment->getEnd());
+			S32 clipped_end	= seg_end - cur_segment->getStart();
 
 			if (mUseEllipses								// using ellipses
 				&& clipped_end == line_end					// last segment on line
@@ -586,6 +693,46 @@ void LLTextBase::drawText()
 				text_rect.mRight -= 2;
 			}
 
+			// Draw squiggly lines under any visible misspelled words
+			while ( (mMisspellRanges.end() != misspell_it) && (misspell_it->first < seg_end) && (misspell_it->second > seg_start) )
+			{
+				// Skip the current word if the user is still busy editing it
+				if ( (!mSpellCheckTimer.hasExpired()) && (misspell_it->first <= (U32)mCursorPos) && (misspell_it->second >= (U32)mCursorPos) )
+				{
+					++misspell_it;
+ 					continue;
+				}
+
+				U32 misspell_start = llmax<U32>(misspell_it->first, seg_start), misspell_end = llmin<U32>(misspell_it->second, seg_end);
+				S32 squiggle_start = 0, squiggle_end = 0, pony = 0;
+				cur_segment->getDimensions(seg_start - cur_segment->getStart(), misspell_start - seg_start, squiggle_start, pony);
+				cur_segment->getDimensions(misspell_start - cur_segment->getStart(), misspell_end - misspell_start, squiggle_end, pony);
+				squiggle_start += text_rect.mLeft;
+
+				pony = (squiggle_end + 3) / 6;
+				squiggle_start += squiggle_end / 2 - pony * 3;
+				squiggle_end = squiggle_start + pony * 6;
+
+				S32 squiggle_bottom = text_rect.mBottom + (S32)cur_segment->getStyle()->getFont()->getDescenderHeight();
+
+				gGL.color4ub(255, 0, 0, 200);
+				while (squiggle_start + 1 < squiggle_end)
+				{
+					gl_line_2d(squiggle_start, squiggle_bottom, squiggle_start + 2, squiggle_bottom - 2);
+					if (squiggle_start + 3 < squiggle_end)
+					{
+						gl_line_2d(squiggle_start + 2, squiggle_bottom - 3, squiggle_start + 4, squiggle_bottom - 1);
+					}
+					squiggle_start += 4;
+				}
+
+				if (misspell_it->second > seg_end)
+				{
+					break;
+				}
+				++misspell_it;
+			}
+
 			text_rect.mLeft = (S32)(cur_segment->draw(seg_start - cur_segment->getStart(), clipped_end, selection_left, selection_right, text_rect));
 
 			seg_start = clipped_end + cur_segment->getStart();
@@ -600,8 +747,7 @@ void LLTextBase::drawText()
 
 S32 LLTextBase::insertStringNoUndo(S32 pos, const LLWString &wstr, LLTextBase::segment_vec_t* segments )
 {
-	LLWString text(getWText());
-	S32 old_len = text.length();		// length() returns character length
+	S32 old_len = getLength();		// length() returns character length
 	S32 insert_len = wstr.length();
 
 	pos = getEditableIndex(pos, true);
@@ -661,8 +807,7 @@ S32 LLTextBase::insertStringNoUndo(S32 pos, const LLWString &wstr, LLTextBase::s
 		}
 	}
 
-	text.insert(pos, wstr);
-	getViewModel()->setDisplay(text);
+	getViewModel()->getEditableDisplay().insert(pos, wstr);
 
 	if ( truncate() )
 	{
@@ -677,7 +822,6 @@ S32 LLTextBase::insertStringNoUndo(S32 pos, const LLWString &wstr, LLTextBase::s
 
 S32 LLTextBase::removeStringNoUndo(S32 pos, S32 length)
 {
-	LLWString text(getWText());
 	segment_set_t::iterator seg_iter = getSegIterContaining(pos);
 	while(seg_iter != mSegments.end())
 	{
@@ -723,8 +867,7 @@ S32 LLTextBase::removeStringNoUndo(S32 pos, S32 length)
 		++seg_iter;
 	}
 
-	text.erase(pos, length);
-	getViewModel()->setDisplay(text);
+	getViewModel()->getEditableDisplay().erase(pos, length);
 
 	// recreate default segment in case we erased everything
 	createDefaultSegment();
@@ -741,9 +884,7 @@ S32 LLTextBase::overwriteCharNoUndo(S32 pos, llwchar wc)
 	{
 		return 0;
 	}
-	LLWString text(getWText());
-	text[pos] = wc;
-	getViewModel()->setDisplay(text);
+	getViewModel()->getEditableDisplay()[pos] = wc;
 
 	onValueChange(pos, pos + 1);
 	needsReflow(pos);
@@ -1111,6 +1252,100 @@ void LLTextBase::deselect()
 	mIsSelecting = FALSE;
 }
 
+bool LLTextBase::getSpellCheck() const
+{
+	return (LLSpellChecker::getUseSpellCheck()) && (!mReadOnly) && (mSpellCheck);
+}
+
+const std::string& LLTextBase::getSuggestion(U32 index) const
+{
+	return (index < mSuggestionList.size()) ? mSuggestionList[index] : LLStringUtil::null;
+}
+
+U32 LLTextBase::getSuggestionCount() const
+{
+	return mSuggestionList.size();
+}
+
+void LLTextBase::replaceWithSuggestion(U32 index)
+{
+	for (std::list<std::pair<U32, U32> >::const_iterator it = mMisspellRanges.begin(); it != mMisspellRanges.end(); ++it)
+	{
+		if ( (it->first <= (U32)mCursorPos) && (it->second >= (U32)mCursorPos) )
+		{
+			deselect();
+
+			// Delete the misspelled word
+			removeStringNoUndo(it->first, it->second - it->first);
+
+			// Insert the suggestion in its place
+			LLWString suggestion = utf8str_to_wstring(mSuggestionList[index]);
+			insertStringNoUndo(it->first, utf8str_to_wstring(mSuggestionList[index]));
+			setCursorPos(it->first + (S32)suggestion.length());
+
+			break;
+		}
+	}
+	mSpellCheckStart = mSpellCheckEnd = -1;
+}
+
+void LLTextBase::addToDictionary()
+{
+	if (canAddToDictionary())
+	{
+		LLSpellChecker::instance().addToCustomDictionary(getMisspelledWord(mCursorPos));
+	}
+}
+
+bool LLTextBase::canAddToDictionary() const
+{
+	return (getSpellCheck()) && (isMisspelledWord(mCursorPos));
+}
+
+void LLTextBase::addToIgnore()
+{
+	if (canAddToIgnore())
+	{
+		LLSpellChecker::instance().addToIgnoreList(getMisspelledWord(mCursorPos));
+	}
+}
+
+bool LLTextBase::canAddToIgnore() const
+{
+	return (getSpellCheck()) && (isMisspelledWord(mCursorPos));
+}
+
+std::string LLTextBase::getMisspelledWord(U32 pos) const
+{
+	for (std::list<std::pair<U32, U32> >::const_iterator it = mMisspellRanges.begin(); it != mMisspellRanges.end(); ++it)
+	{
+		if ( (it->first <= pos) && (it->second >= pos) )
+		{
+			return wstring_to_utf8str(getWText().substr(it->first, it->second - it->first));
+		}
+	}
+	return LLStringUtil::null;
+}
+
+bool LLTextBase::isMisspelledWord(U32 pos) const
+{
+	for (std::list<std::pair<U32, U32> >::const_iterator it = mMisspellRanges.begin(); it != mMisspellRanges.end(); ++it)
+	{
+		if ( (it->first <= pos) && (it->second >= pos) )
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
+void LLTextBase::onSpellCheckSettingsChange()
+{
+	// Recheck the spelling on every change
+	mMisspellRanges.clear();
+	mSpellCheckStart = mSpellCheckEnd = -1;
+}
+
 void LLTextBase::onFocusReceived()
 {
 	if (!getLength() && !mLabel.empty())
@@ -1709,6 +1944,8 @@ static LLUIImagePtr image_from_icon_name(const std::string& icon_name)
 	}
 }
 
+static LLFastTimer::DeclareTimer FTM_PARSE_HTML("Parse HTML");
+
 void LLTextBase::appendTextImpl(const std::string &new_text, const LLStyle::Params& input_params)
 {
 	LLStyle::Params style_params(input_params);
@@ -1717,15 +1954,13 @@ void LLTextBase::appendTextImpl(const std::string &new_text, const LLStyle::Para
 	S32 part = (S32)LLTextParser::WHOLE;
 	if (mParseHTML && !style_params.is_link) // Don't search for URLs inside a link segment (STORM-358).
 	{
+		LLFastTimer _(FTM_PARSE_HTML);
 		S32 start=0,end=0;
 		LLUrlMatch match;
 		std::string text = new_text;
 		while ( LLUrlRegistry::instance().findUrl(text, match,
 				boost::bind(&LLTextBase::replaceUrl, this, _1, _2, _3)) )
 		{
-			
-			LLTextUtil::processUrlMatch(&match,this);
-
 			start = match.getStart();
 			end = match.getEnd()+1;
 
@@ -1761,6 +1996,8 @@ void LLTextBase::appendTextImpl(const std::string &new_text, const LLStyle::Para
 					}
 			}
 
+			LLTextUtil::processUrlMatch(&match,this);
+
 			// move on to the rest of the text after the Url
 			if (end < (S32)text.length()) 
 			{
@@ -1784,8 +2021,11 @@ void LLTextBase::appendTextImpl(const std::string &new_text, const LLStyle::Para
 	}
 }
 
+static LLFastTimer::DeclareTimer FTM_APPEND_TEXT("Append Text");
+
 void LLTextBase::appendText(const std::string &new_text, bool prepend_newline, const LLStyle::Params& input_params)
 {
+	LLFastTimer _(FTM_APPEND_TEXT);
 	if (new_text.empty()) 
 		return;
 
diff --git a/indra/llui/lltextbase.h b/indra/llui/lltextbase.h
index 412272b352..79662ebd33 100644
--- a/indra/llui/lltextbase.h
+++ b/indra/llui/lltextbase.h
@@ -30,6 +30,7 @@
 
 #include "v4color.h"
 #include "lleditmenuhandler.h"
+#include "llspellcheckmenuhandler.h"
 #include "llstyle.h"
 #include "llkeywords.h"
 #include "llpanel.h"
@@ -248,7 +249,8 @@ typedef LLPointer<LLTextSegment> LLTextSegmentPtr;
 ///
 class LLTextBase 
 :	public LLUICtrl,
-	protected LLEditMenuHandler
+	protected LLEditMenuHandler,
+	public LLSpellCheckMenuHandler
 {
 public:
 	friend class LLTextSegment;
@@ -278,6 +280,7 @@ public:
 								border_visible,
 								track_end,
 								read_only,
+								spellcheck,
 								allow_scroll,
 								plain_text,
 								wrap,
@@ -333,6 +336,24 @@ public:
 	virtual void	onFocusReceived();
 	virtual void	onFocusLost();
 
+	// LLSpellCheckMenuHandler overrides
+	/*virtual*/ bool		getSpellCheck() const;
+
+	/*virtual*/ const std::string& getSuggestion(U32 index) const;
+	/*virtual*/ U32			getSuggestionCount() const;
+	/*virtual*/ void		replaceWithSuggestion(U32 index);
+
+	/*virtual*/ void		addToDictionary();
+	/*virtual*/ bool		canAddToDictionary() const;
+
+	/*virtual*/ void		addToIgnore();
+	/*virtual*/ bool		canAddToIgnore() const;
+
+	// Spell checking helper functions
+	std::string				getMisspelledWord(U32 pos) const;
+	bool					isMisspelledWord(U32 pos) const;
+	void					onSpellCheckSettingsChange();
+
 	// used by LLTextSegment layout code
 	bool					getWordWrap() { return mWordWrap; }
 	bool					getUseEllipses() { return mUseEllipses; }
@@ -578,6 +599,14 @@ protected:
 	
 	BOOL						mIsSelecting;		// Are we in the middle of a drag-select? 
 
+	// spell checking
+	bool						mSpellCheck;
+	S32							mSpellCheckStart;
+	S32							mSpellCheckEnd;
+	LLTimer						mSpellCheckTimer;
+	std::list<std::pair<U32, U32> > mMisspellRanges;
+	std::vector<std::string>		mSuggestionList;
+
 	// configuration
 	S32							mHPad;				// padding on left of text
 	S32							mVPad;				// padding above text
diff --git a/indra/llui/lltextbox.cpp b/indra/llui/lltextbox.cpp
index 6a905b7ec0..11cfa1d263 100644
--- a/indra/llui/lltextbox.cpp
+++ b/indra/llui/lltextbox.cpp
@@ -150,7 +150,7 @@ S32 LLTextBox::getTextPixelHeight()
 
 LLSD LLTextBox::getValue() const
 {
-	return LLSD(getText());
+	return getViewModel()->getValue();
 }
 
 BOOL LLTextBox::setTextArg( const std::string& key, const LLStringExplicit& text )
diff --git a/indra/llui/lltexteditor.cpp b/indra/llui/lltexteditor.cpp
index 4fa6ea085e..d42d6473ed 100644
--- a/indra/llui/lltexteditor.cpp
+++ b/indra/llui/lltexteditor.cpp
@@ -54,6 +54,7 @@
 #include "llwindow.h"
 #include "lltextparser.h"
 #include "llscrollcontainer.h"
+#include "llspellcheck.h"
 #include "llpanel.h"
 #include "llurlregistry.h"
 #include "lltooltip.h"
@@ -77,6 +78,7 @@ template class LLTextEditor* LLView::getChild<class LLTextEditor>(
 const S32	UI_TEXTEDITOR_LINE_NUMBER_MARGIN = 32;
 const S32	UI_TEXTEDITOR_LINE_NUMBER_DIGITS = 4;
 const S32	SPACES_PER_TAB = 4;
+const F32	SPELLCHECK_DELAY = 0.5f;	// delay between the last keypress and spell checking the word the cursor is on
 
 ///////////////////////////////////////////////////////////////////
 
@@ -1959,7 +1961,38 @@ void LLTextEditor::showContextMenu(S32 x, S32 y)
 
 	S32 screen_x, screen_y;
 	localPointToScreen(x, y, &screen_x, &screen_y);
-	mContextMenu->show(screen_x, screen_y);
+
+	setCursorAtLocalPos(x, y, false);
+	if (hasSelection())
+	{
+		if ( (mCursorPos < llmin(mSelectionStart, mSelectionEnd)) || (mCursorPos > llmax(mSelectionStart, mSelectionEnd)) )
+		{
+			deselect();
+		}
+		else
+		{
+			setCursorPos(llmax(mSelectionStart, mSelectionEnd));
+		}
+	}
+
+	bool use_spellcheck = getSpellCheck(), is_misspelled = false;
+	if (use_spellcheck)
+	{
+		mSuggestionList.clear();
+
+		// If the cursor is on a misspelled word, retrieve suggestions for it
+		std::string misspelled_word = getMisspelledWord(mCursorPos);
+		if ((is_misspelled = !misspelled_word.empty()) == true)
+		{
+			LLSpellChecker::instance().getSuggestions(misspelled_word, mSuggestionList);
+		}
+	}
+
+	mContextMenu->setItemVisible("Suggestion Separator", (use_spellcheck) && (!mSuggestionList.empty()));
+	mContextMenu->setItemVisible("Add to Dictionary", (use_spellcheck) && (is_misspelled));
+	mContextMenu->setItemVisible("Add to Ignore", (use_spellcheck) && (is_misspelled));
+	mContextMenu->setItemVisible("Spellcheck Separator", (use_spellcheck) && (is_misspelled));
+	mContextMenu->show(screen_x, screen_y, this);
 }
 
 
@@ -2844,6 +2877,9 @@ void LLTextEditor::setKeystrokeCallback(const keystroke_signal_t::slot_type& cal
 void LLTextEditor::onKeyStroke()
 {
 	mKeystrokeSignal(this);
+
+	mSpellCheckStart = mSpellCheckEnd = -1;
+	mSpellCheckTimer.setTimerExpirySec(SPELLCHECK_DELAY);
 }
 
 //virtual
diff --git a/indra/llui/lltrans.cpp b/indra/llui/lltrans.cpp
new file mode 100644
index 0000000000..5388069c24
--- /dev/null
+++ b/indra/llui/lltrans.cpp
@@ -0,0 +1,295 @@
+/**
+ * @file lltrans.cpp
+ * @brief LLTrans implementation
+ *
+ * $LicenseInfo:firstyear=2000&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "lltrans.h"
+
+#include "llfasttimer.h"	// for call count statistics
+#include "llxuiparser.h"
+#include "llsd.h"
+#include "llxmlnode.h"
+
+#include <map>
+
+LLTrans::template_map_t LLTrans::sStringTemplates;
+LLStringUtil::format_map_t LLTrans::sDefaultArgs;
+
+struct StringDef : public LLInitParam::Block<StringDef>
+{
+	Mandatory<std::string> name;
+	Mandatory<std::string> value;
+
+	StringDef()
+	:	name("name"),
+		value("value")
+	{}
+};
+
+struct StringTable : public LLInitParam::Block<StringTable>
+{
+	Multiple<StringDef> strings;
+	StringTable()
+	:	strings("string")
+	{}
+};
+
+//static 
+bool LLTrans::parseStrings(LLXMLNodePtr &root, const std::set<std::string>& default_args)
+{
+	std::string xml_filename = "(strings file)";
+	if (!root->hasName("strings"))
+	{
+		llerrs << "Invalid root node name in " << xml_filename 
+			<< ": was " << root->getName() << ", expected \"strings\"" << llendl;
+	}
+
+	StringTable string_table;
+	LLXUIParser parser;
+	parser.readXUI(root, string_table, xml_filename);
+
+	if (!string_table.validateBlock())
+	{
+		llerrs << "Problem reading strings: " << xml_filename << llendl;
+		return false;
+	}
+	
+	sStringTemplates.clear();
+	sDefaultArgs.clear();
+	
+	for(LLInitParam::ParamIterator<StringDef>::const_iterator it = string_table.strings.begin();
+		it != string_table.strings.end();
+		++it)
+	{
+		LLTransTemplate xml_template(it->name, it->value);
+		sStringTemplates[xml_template.mName] = xml_template;
+		
+		std::set<std::string>::const_iterator iter = default_args.find(xml_template.mName);
+		if (iter != default_args.end())
+		{
+			std::string name = *iter;
+			if (name[0] != '[')
+				name = llformat("[%s]",name.c_str());
+			sDefaultArgs[name] = xml_template.mText;
+		}
+	}
+
+	return true;
+}
+
+
+//static
+bool LLTrans::parseLanguageStrings(LLXMLNodePtr &root)
+{
+	std::string xml_filename = "(language strings file)";
+	if (!root->hasName("strings"))
+	{
+		llerrs << "Invalid root node name in " << xml_filename 
+		<< ": was " << root->getName() << ", expected \"strings\"" << llendl;
+	}
+	
+	StringTable string_table;
+	LLXUIParser parser;
+	parser.readXUI(root, string_table, xml_filename);
+	
+	if (!string_table.validateBlock())
+	{
+		llerrs << "Problem reading strings: " << xml_filename << llendl;
+		return false;
+	}
+		
+	for(LLInitParam::ParamIterator<StringDef>::const_iterator it = string_table.strings.begin();
+		it != string_table.strings.end();
+		++it)
+	{
+		// share the same map with parseStrings() so we can search the strings using the same getString() function.- angela
+		LLTransTemplate xml_template(it->name, it->value);
+		sStringTemplates[xml_template.mName] = xml_template;
+	}
+	
+	return true;
+}
+
+
+
+static LLFastTimer::DeclareTimer FTM_GET_TRANS("Translate string");
+
+//static 
+std::string LLTrans::getString(const std::string &xml_desc, const LLStringUtil::format_map_t& msg_args)
+{
+	// Don't care about time as much as call count.  Make sure we're not
+	// calling LLTrans::getString() in an inner loop. JC
+	LLFastTimer timer(FTM_GET_TRANS);
+	
+	template_map_t::iterator iter = sStringTemplates.find(xml_desc);
+	if (iter != sStringTemplates.end())
+	{
+		std::string text = iter->second.mText;
+		LLStringUtil::format_map_t args = sDefaultArgs;
+		args.insert(msg_args.begin(), msg_args.end());
+		LLStringUtil::format(text, args);
+		
+		return text;
+	}
+	else
+	{
+		LL_WARNS_ONCE("configuration") << "Missing String in strings.xml: [" << xml_desc << "]" << LL_ENDL;
+		return "MissingString("+xml_desc+")";
+	}
+}
+
+//static
+std::string LLTrans::getString(const std::string &xml_desc, const LLSD& msg_args)
+{
+	// Don't care about time as much as call count.  Make sure we're not
+	// calling LLTrans::getString() in an inner loop. JC
+	LLFastTimer timer(FTM_GET_TRANS);
+
+	template_map_t::iterator iter = sStringTemplates.find(xml_desc);
+	if (iter != sStringTemplates.end())
+	{
+		std::string text = iter->second.mText;
+		LLStringUtil::format(text, msg_args);
+		return text;
+	}
+	else
+	{
+		LL_WARNS_ONCE("configuration") << "Missing String in strings.xml: [" << xml_desc << "]" << LL_ENDL;
+		return "MissingString("+xml_desc+")";
+	}
+}
+
+//static 
+bool LLTrans::findString(std::string &result, const std::string &xml_desc, const LLStringUtil::format_map_t& msg_args)
+{
+	LLFastTimer timer(FTM_GET_TRANS);
+	
+	template_map_t::iterator iter = sStringTemplates.find(xml_desc);
+	if (iter != sStringTemplates.end())
+	{
+		std::string text = iter->second.mText;
+		LLStringUtil::format_map_t args = sDefaultArgs;
+		args.insert(msg_args.begin(), msg_args.end());
+		LLStringUtil::format(text, args);
+		result = text;
+		return true;
+	}
+	else
+	{
+		LL_WARNS_ONCE("configuration") << "Missing String in strings.xml: [" << xml_desc << "]" << LL_ENDL;	
+		return false;
+	}
+}
+
+//static
+bool LLTrans::findString(std::string &result, const std::string &xml_desc, const LLSD& msg_args)
+{
+	LLFastTimer timer(FTM_GET_TRANS);
+
+	template_map_t::iterator iter = sStringTemplates.find(xml_desc);
+	if (iter != sStringTemplates.end())
+	{
+		std::string text = iter->second.mText;
+		LLStringUtil::format(text, msg_args);
+		result = text;
+		return true;
+	}
+	else
+	{
+		LL_WARNS_ONCE("configuration") << "Missing String in strings.xml: [" << xml_desc << "]" << LL_ENDL;	
+		return false;
+	}
+}
+
+//static
+std::string LLTrans::getCountString(const std::string& language, const std::string& xml_desc, S32 count)
+{
+	// Compute which string identifier to use
+	const char* form = "";
+	if (language == "ru") // Russian
+	{
+		// From GNU ngettext()
+		// Plural-Forms: nplurals=3; plural=n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2;
+		if (count % 10 == 1
+			&& count % 100 != 11)
+		{
+			// singular, "1 item"
+			form = "A";
+		}
+		else if (count % 10 >= 2
+			&& count % 10 <= 4
+			&& (count % 100 < 10 || count % 100 >= 20) )
+		{
+			// special case "2 items", "23 items", but not "13 items"
+			form = "B";
+		}
+		else
+		{
+			// English-style plural, "5 items"
+			form = "C";
+		}
+	}
+	else if (language == "fr" || language == "pt") // French, Brazilian Portuguese
+	{
+		// French and Portuguese treat zero as a singular "0 item" not "0 items"
+		if (count == 0 || count == 1)
+		{
+			form = "A";
+		}
+		else
+		{
+			// English-style plural
+			form = "B";
+		}
+	}
+	else // default
+	{
+		// languages like English with 2 forms, singular and plural
+		if (count == 1)
+		{
+			// "1 item"
+			form = "A";
+		}
+		else
+		{
+			// "2 items", also use plural for "0 items"
+			form = "B";
+		}
+	}
+
+	// Translate that string
+	LLStringUtil::format_map_t args;
+	args["[COUNT]"] = llformat("%d", count);
+
+	// Look up "AgeYearsB" or "AgeWeeksC" including the "form"
+	std::string key = llformat("%s%s", xml_desc.c_str(), form);
+	return getString(key, args);
+}
+
+void LLTrans::setDefaultArg(const std::string& name, const std::string& value)
+{
+	sDefaultArgs[name] = value;
+}
diff --git a/indra/llui/lltrans.h b/indra/llui/lltrans.h
new file mode 100644
index 0000000000..128b51d383
--- /dev/null
+++ b/indra/llui/lltrans.h
@@ -0,0 +1,133 @@
+/**
+ * @file lltrans.h
+ * @brief LLTrans definition
+ *
+ * $LicenseInfo:firstyear=2000&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_TRANS_H
+#define LL_TRANS_H
+
+#include <map>
+
+#include "llpointer.h"
+#include "llstring.h"
+
+class LLXMLNode;
+
+class LLSD;
+
+/**
+ * @brief String template loaded from strings.xml
+ */
+class LLTransTemplate
+{
+public:
+	LLTransTemplate(const std::string& name = LLStringUtil::null, const std::string& text = LLStringUtil::null) : mName(name), mText(text) {}
+
+	std::string mName;
+	std::string mText;
+};
+
+/**
+ * @brief Localized strings class
+ * This class is used to retrieve translations of strings used to build larger ones, as well as
+ * strings with a general usage that don't belong to any specific floater. For example,
+ * "Owner:", "Retrieving..." used in the place of a not yet known name, etc.
+ */
+class LLTrans
+{
+public:
+	LLTrans();
+
+	/**
+	 * @brief Parses the xml root that holds the strings. Used once on startup
+// *FIXME	 * @param xml_filename Filename to parse
+	 * @param default_args Set of strings (expected to be in the file) to use as default replacement args, e.g. "SECOND_LIFE"
+	 * @returns true if the file was parsed successfully, true if something went wrong
+	 */
+	static bool parseStrings(LLPointer<LLXMLNode> & root, const std::set<std::string>& default_args);
+
+	static bool parseLanguageStrings(LLPointer<LLXMLNode> & root);
+
+	/**
+	 * @brief Returns a translated string
+	 * @param xml_desc String's description
+	 * @param args A list of substrings to replace in the string
+	 * @returns Translated string
+	 */
+	static std::string getString(const std::string &xml_desc, const LLStringUtil::format_map_t& args);
+	static std::string getString(const std::string &xml_desc, const LLSD& args);
+	static bool findString(std::string &result, const std::string &xml_desc, const LLStringUtil::format_map_t& args);
+	static bool findString(std::string &result, const std::string &xml_desc, const LLSD& args);
+
+	// Returns translated string with [COUNT] replaced with a number, following
+	// special per-language logic for plural nouns.  For example, some languages
+	// may have different plurals for 0, 1, 2 and > 2.
+	// See "AgeWeeksA", "AgeWeeksB", etc. in strings.xml for examples.
+	static std::string getCountString(const std::string& language, const std::string& xml_desc, S32 count);
+
+	/**
+	 * @brief Returns a translated string
+	 * @param xml_desc String's description
+	 * @returns Translated string
+	 */
+	static std::string getString(const std::string &xml_desc)
+	{
+		LLStringUtil::format_map_t empty;
+		return getString(xml_desc, empty);
+	}
+
+	static bool findString(std::string &result, const std::string &xml_desc)
+	{
+		LLStringUtil::format_map_t empty;
+		return findString(result, xml_desc, empty);
+	}
+
+	static std::string getKeyboardString(const char* keystring)
+	{
+		std::string key_str(keystring);
+		std::string trans_str;
+		return findString(trans_str, key_str) ? trans_str : key_str; 
+	}
+
+	// get the default args
+	static const LLStringUtil::format_map_t& getDefaultArgs()
+	{
+		return sDefaultArgs;
+	}
+
+	static void setDefaultArg(const std::string& name, const std::string& value);
+
+	// insert default args into an arg list
+	static void getArgs(LLStringUtil::format_map_t& args)
+	{
+		args.insert(sDefaultArgs.begin(), sDefaultArgs.end());
+	}
+	
+private:
+	typedef std::map<std::string, LLTransTemplate > template_map_t;
+	static template_map_t sStringTemplates;
+	static LLStringUtil::format_map_t sDefaultArgs;
+};
+
+#endif
diff --git a/indra/llui/llui.cpp b/indra/llui/llui.cpp
index 8da0d58f51..41a948e545 100644
--- a/indra/llui/llui.cpp
+++ b/indra/llui/llui.cpp
@@ -831,7 +831,11 @@ void gl_stippled_line_3d( const LLVector3& start, const LLVector3& end, const LL
 
 	gGL.flush();
 	glLineWidth(2.5f);
-	glLineStipple(2, 0x3333 << shift);
+
+	if (!LLGLSLShader::sNoFixedFunction)
+	{
+		glLineStipple(2, 0x3333 << shift);
+	}
 
 	gGL.begin(LLRender::LINES);
 	{
diff --git a/indra/llui/lluicolor.cpp b/indra/llui/lluicolor.cpp
new file mode 100644
index 0000000000..f9bb80f8c5
--- /dev/null
+++ b/indra/llui/lluicolor.cpp
@@ -0,0 +1,87 @@
+/** 
+ * @file lluicolor.cpp
+ * @brief brief LLUIColor class implementation file
+ *
+ * $LicenseInfo:firstyear=2009&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "lluicolor.h"
+
+LLUIColor::LLUIColor()
+	:mColorPtr(NULL)
+{
+}
+
+
+LLUIColor::LLUIColor(const LLColor4& color)
+:	mColor(color), 
+	mColorPtr(NULL)
+{
+}
+
+LLUIColor::LLUIColor(const LLUIColor* color)
+:	mColorPtr(color)
+{
+}
+
+void LLUIColor::set(const LLColor4& color)
+{
+	mColor = color;
+	mColorPtr = NULL;
+}
+
+void LLUIColor::set(const LLUIColor* color)
+{
+	mColorPtr = color;
+}
+
+const LLColor4& LLUIColor::get() const
+{
+	return (mColorPtr == NULL ? mColor : mColorPtr->get());
+}
+
+LLUIColor::operator const LLColor4& () const
+{
+	return get();
+}
+
+const LLColor4& LLUIColor::operator()() const
+{
+	return get();
+}
+
+bool LLUIColor::isReference() const
+{
+	return mColorPtr != NULL;
+}
+
+namespace LLInitParam
+{
+	// used to detect equivalence with default values on export
+	bool ParamCompare<LLUIColor, false>::equals(const LLUIColor &a, const LLUIColor &b)
+	{
+		// do not detect value equivalence, treat pointers to colors as distinct from color values
+		return (a.mColorPtr == NULL && b.mColorPtr == NULL ? a.mColor == b.mColor : a.mColorPtr == b.mColorPtr);
+	}
+}
diff --git a/indra/llui/lluicolor.h b/indra/llui/lluicolor.h
new file mode 100644
index 0000000000..97ebea854a
--- /dev/null
+++ b/indra/llui/lluicolor.h
@@ -0,0 +1,71 @@
+/** 
+ * @file lluicolor.h
+ * @brief brief LLUIColor class header file
+ *
+ * $LicenseInfo:firstyear=2009&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLUICOLOR_H_
+#define LL_LLUICOLOR_H_
+
+#include "v4color.h"
+
+namespace LLInitParam
+{
+	template<typename T, bool>
+	struct ParamCompare;
+}
+
+class LLUIColor
+{
+public:
+	LLUIColor();
+	LLUIColor(const LLColor4& color);
+	LLUIColor(const LLUIColor* color);
+
+	void set(const LLColor4& color);
+	void set(const LLUIColor* color);
+
+	const LLColor4& get() const;
+
+	operator const LLColor4& () const;
+	const LLColor4& operator()() const;
+
+	bool isReference() const;
+
+private:
+	friend struct LLInitParam::ParamCompare<LLUIColor, false>;
+
+	const LLUIColor* mColorPtr;
+	LLColor4 mColor;
+};
+
+namespace LLInitParam
+{
+	template<>
+	struct ParamCompare<LLUIColor, false>
+	{
+		static bool equals(const LLUIColor& a, const LLUIColor& b);
+	};
+}
+
+#endif
diff --git a/indra/llui/llviewmodel.h b/indra/llui/llviewmodel.h
index 763af5d8a2..ef2e314799 100644
--- a/indra/llui/llviewmodel.h
+++ b/indra/llui/llviewmodel.h
@@ -102,6 +102,7 @@ public:
 	// New functions
     /// Get the stored value in string form
     const LLWString& getDisplay() const { return mDisplay; }
+	LLWString& getEditableDisplay() { mDirty = true; mUpdateFromDisplay = true; return mDisplay; }
 
     /**
      * Set the display string directly (see LLTextEditor). What the user is
diff --git a/indra/llui/llxuiparser.cpp b/indra/llui/llxuiparser.cpp
new file mode 100644
index 0000000000..3ad5ad7d42
--- /dev/null
+++ b/indra/llui/llxuiparser.cpp
@@ -0,0 +1,1786 @@
+/** 
+ * @file llxuiparser.cpp
+ * @brief Utility functions for handling XUI structures in XML
+ *
+ * $LicenseInfo:firstyear=2003&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llxuiparser.h"
+
+#include "llxmlnode.h"
+
+#ifdef LL_STANDALONE
+#include <expat.h>
+#else
+#include "expat/expat.h"
+#endif
+
+#include <fstream>
+#include <boost/tokenizer.hpp>
+//#include <boost/spirit/include/qi.hpp>
+#include <boost/spirit/include/classic_core.hpp>
+
+#include "lluicolor.h"
+#include "v3math.h"
+using namespace BOOST_SPIRIT_CLASSIC_NS;
+
+const S32 MAX_STRING_ATTRIBUTE_SIZE = 40;
+
+static 	LLInitParam::Parser::parser_read_func_map_t sXSDReadFuncs;
+static 	LLInitParam::Parser::parser_write_func_map_t sXSDWriteFuncs;
+static 	LLInitParam::Parser::parser_inspect_func_map_t sXSDInspectFuncs;
+
+static 	LLInitParam::Parser::parser_read_func_map_t sSimpleXUIReadFuncs;
+static 	LLInitParam::Parser::parser_write_func_map_t sSimpleXUIWriteFuncs;
+static 	LLInitParam::Parser::parser_inspect_func_map_t sSimpleXUIInspectFuncs;
+
+const char* NO_VALUE_MARKER = "no_value";
+
+const S32 LINE_NUMBER_HERE = 0;
+
+struct MaxOccursValues : public LLInitParam::TypeValuesHelper<U32, MaxOccursValues>
+{
+	static void declareValues()
+	{
+		declare("unbounded", U32_MAX);
+	}
+};
+
+struct Occurs : public LLInitParam::Block<Occurs>
+{
+	Optional<U32>					minOccurs;
+	Optional<U32, MaxOccursValues>	maxOccurs;
+
+	Occurs()
+	:	minOccurs("minOccurs", 0),
+		maxOccurs("maxOccurs", U32_MAX)
+
+	{}
+};
+
+typedef enum
+{
+	USE_REQUIRED,
+	USE_OPTIONAL
+} EUse;
+
+namespace LLInitParam
+{
+	template<>
+	struct TypeValues<EUse> : public TypeValuesHelper<EUse>
+	{
+		static void declareValues()
+		{
+			declare("required", USE_REQUIRED);
+			declare("optional", USE_OPTIONAL);
+		}
+	};
+}
+
+struct Element;
+struct Group;
+struct Sequence;
+
+struct All : public LLInitParam::Block<All, Occurs>
+{
+	Multiple< Lazy<Element, IS_A_BLOCK> > elements;
+
+	All()
+	:	elements("element")
+	{
+		maxOccurs = 1;
+	}
+};
+
+struct Attribute : public LLInitParam::Block<Attribute>
+{
+	Mandatory<std::string>	name,
+							type;
+	Mandatory<EUse>			use;
+	
+	Attribute()
+	:	name("name"),
+		type("type"),
+		use("use")
+	{}
+};
+
+struct Any : public LLInitParam::Block<Any, Occurs>
+{
+	Optional<std::string> _namespace;
+
+	Any()
+	:	_namespace("namespace")
+	{}
+};
+
+struct Choice : public LLInitParam::ChoiceBlock<Choice, Occurs>
+{
+	Alternative< Lazy<Element, IS_A_BLOCK> >	element;
+	Alternative< Lazy<Group, IS_A_BLOCK> >		group;
+	Alternative< Lazy<Choice, IS_A_BLOCK> >		choice;
+	Alternative< Lazy<Sequence, IS_A_BLOCK> >	sequence;
+	Alternative< Lazy<Any> >					any;
+
+	Choice()
+	:	element("element"),
+		group("group"),
+		choice("choice"),
+		sequence("sequence"),
+		any("any")
+	{}
+
+};
+
+struct Sequence : public LLInitParam::ChoiceBlock<Sequence, Occurs>
+{
+	Alternative< Lazy<Element, IS_A_BLOCK> >	element;
+	Alternative< Lazy<Group, IS_A_BLOCK> >		group;
+	Alternative< Lazy<Choice> >					choice;
+	Alternative< Lazy<Sequence, IS_A_BLOCK> >	sequence;
+	Alternative< Lazy<Any> >					any;
+};
+
+struct GroupContents : public LLInitParam::ChoiceBlock<GroupContents, Occurs>
+{
+	Alternative<All>		all;
+	Alternative<Choice>		choice;
+	Alternative<Sequence>	sequence;
+
+	GroupContents()
+	:	all("all"),
+		choice("choice"),
+		sequence("sequence")
+	{}
+};
+
+struct Group : public LLInitParam::Block<Group, GroupContents>
+{
+	Optional<std::string>	name,
+							ref;
+
+	Group()
+	:	name("name"),
+		ref("ref")
+	{}
+};
+
+struct Restriction : public LLInitParam::Block<Restriction>
+{
+};
+
+struct Extension : public LLInitParam::Block<Extension>
+{
+};
+
+struct SimpleContent : public LLInitParam::ChoiceBlock<SimpleContent>
+{
+	Alternative<Restriction> restriction;
+	Alternative<Extension> extension;
+
+	SimpleContent()
+	:	restriction("restriction"),
+		extension("extension")
+	{}
+};
+
+struct SimpleType : public LLInitParam::Block<SimpleType>
+{
+	// TODO
+};
+
+struct ComplexContent : public LLInitParam::Block<ComplexContent, SimpleContent>
+{
+	Optional<bool> mixed;
+
+	ComplexContent()
+	:	mixed("mixed", true)
+	{}
+};
+
+struct ComplexTypeContents : public LLInitParam::ChoiceBlock<ComplexTypeContents>
+{
+	Alternative<SimpleContent>	simple_content;
+	Alternative<ComplexContent> complex_content;
+	Alternative<Group>			group;
+	Alternative<All>			all;
+	Alternative<Choice>			choice;
+	Alternative<Sequence>		sequence;
+
+	ComplexTypeContents()
+	:	simple_content("simpleContent"),
+		complex_content("complexContent"),
+		group("group"),
+		all("all"),
+		choice("choice"),
+		sequence("sequence")
+	{}
+};
+
+struct ComplexType : public LLInitParam::Block<ComplexType, ComplexTypeContents>
+{
+	Optional<std::string>			name;
+	Optional<bool>					mixed;
+
+	Multiple<Attribute>				attribute;
+	Multiple< Lazy<Element, IS_A_BLOCK > >			elements;
+
+	ComplexType()
+	:	name("name"),
+		attribute("xs:attribute"),
+		elements("xs:element"),
+		mixed("mixed")
+	{
+	}
+};
+
+struct ElementContents : public LLInitParam::ChoiceBlock<ElementContents, Occurs>
+{
+	Alternative<SimpleType>		simpleType;
+	Alternative<ComplexType>	complexType;
+
+	ElementContents()
+	:	simpleType("simpleType"),
+		complexType("complexType")
+	{}
+};
+
+struct Element : public LLInitParam::Block<Element, ElementContents>
+{
+	Optional<std::string>	name,
+							ref,
+							type;
+
+	Element()
+	:	name("xs:name"),
+		ref("xs:ref"),
+		type("xs:type")
+	{}
+};
+
+struct Schema : public LLInitParam::Block<Schema>
+{
+private:
+	Mandatory<std::string>	targetNamespace,
+							xmlns,
+							xs;
+
+public:
+	Optional<std::string>	attributeFormDefault,
+							elementFormDefault;
+
+	Mandatory<Element>		root_element;
+	
+	void setNameSpace(const std::string& ns) {targetNamespace = ns; xmlns = ns;}
+
+	Schema(const std::string& ns = LLStringUtil::null)
+	:	attributeFormDefault("attributeFormDefault"),
+		elementFormDefault("elementFormDefault"),
+		xs("xmlns:xs"),
+		targetNamespace("targetNamespace"),
+		xmlns("xmlns"),
+		root_element("xs:element")
+	{
+		attributeFormDefault = "unqualified";
+		elementFormDefault = "qualified";
+		xs = "http://www.w3.org/2001/XMLSchema";
+		if (!ns.empty())
+		{
+			setNameSpace(ns);
+		};
+	}
+};
+
+//
+// LLXSDWriter
+//
+LLXSDWriter::LLXSDWriter()
+: Parser(sXSDReadFuncs, sXSDWriteFuncs, sXSDInspectFuncs)
+{
+	registerInspectFunc<bool>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:boolean", _1, _2, _3, _4));
+	registerInspectFunc<std::string>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:string", _1, _2, _3, _4));
+	registerInspectFunc<U8>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:unsignedByte", _1, _2, _3, _4));
+	registerInspectFunc<S8>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:signedByte", _1, _2, _3, _4));
+	registerInspectFunc<U16>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:unsignedShort", _1, _2, _3, _4));
+	registerInspectFunc<S16>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:signedShort", _1, _2, _3, _4));
+	registerInspectFunc<U32>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:unsignedInt", _1, _2, _3, _4));
+	registerInspectFunc<S32>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:integer", _1, _2, _3, _4));
+	registerInspectFunc<F32>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:float", _1, _2, _3, _4));
+	registerInspectFunc<F64>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:double", _1, _2, _3, _4));
+	registerInspectFunc<LLColor4>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:string", _1, _2, _3, _4));
+	registerInspectFunc<LLUIColor>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:string", _1, _2, _3, _4));
+	registerInspectFunc<LLUUID>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:string", _1, _2, _3, _4));
+	registerInspectFunc<LLSD>(boost::bind(&LLXSDWriter::writeAttribute, this, "xs:string", _1, _2, _3, _4));
+}
+
+void LLXSDWriter::writeXSD(const std::string& type_name, LLXMLNodePtr node, const LLInitParam::BaseBlock& block, const std::string& xml_namespace)
+{
+	Schema schema(xml_namespace);
+
+	schema.root_element.name = type_name;
+	Choice& choice = schema.root_element.complexType.choice;
+
+	choice.minOccurs = 0;
+	choice.maxOccurs = "unbounded";
+
+	mSchemaNode = node;
+	//node->setName("xs:schema");
+	//node->createChild("attributeFormDefault", true)->setStringValue("unqualified");
+	//node->createChild("elementFormDefault", true)->setStringValue("qualified");
+	//node->createChild("targetNamespace", true)->setStringValue(xml_namespace);
+	//node->createChild("xmlns:xs", true)->setStringValue("http://www.w3.org/2001/XMLSchema");
+	//node->createChild("xmlns", true)->setStringValue(xml_namespace);
+
+	//node = node->createChild("xs:complexType", false);
+	//node->createChild("name", true)->setStringValue(type_name);
+	//node->createChild("mixed", true)->setStringValue("true");
+
+	//mAttributeNode = node;
+	//mElementNode = node->createChild("xs:choice", false);
+	//mElementNode->createChild("minOccurs", true)->setStringValue("0");
+	//mElementNode->createChild("maxOccurs", true)->setStringValue("unbounded");
+	block.inspectBlock(*this);
+
+	// duplicate element choices
+	LLXMLNodeList children;
+	mElementNode->getChildren("xs:element", children, FALSE);
+	for (LLXMLNodeList::iterator child_it = children.begin(); child_it != children.end(); ++child_it)
+	{
+		LLXMLNodePtr child_copy = child_it->second->deepCopy();
+		std::string child_name;
+		child_copy->getAttributeString("name", child_name);
+		child_copy->setAttributeString("name", type_name + "." + child_name);
+		mElementNode->addChild(child_copy);
+	}
+
+	LLXMLNodePtr element_declaration_node = mSchemaNode->createChild("xs:element", false);
+	element_declaration_node->createChild("name", true)->setStringValue(type_name);
+	element_declaration_node->createChild("type", true)->setStringValue(type_name);
+}
+
+void LLXSDWriter::writeAttribute(const std::string& type, const Parser::name_stack_t& stack, S32 min_count, S32 max_count, const std::vector<std::string>* possible_values)
+{
+	name_stack_t non_empty_names;
+	std::string attribute_name;
+	for (name_stack_t::const_iterator it = stack.begin();
+		it != stack.end();
+		++it)
+	{
+		const std::string& name = it->first;
+		if (!name.empty())
+		{
+			non_empty_names.push_back(*it);
+		}
+	}
+
+	for (name_stack_t::const_iterator it = non_empty_names.begin();
+		it != non_empty_names.end();
+		++it)
+	{
+		if (!attribute_name.empty())
+		{
+			attribute_name += ".";
+		}
+		attribute_name += it->first;
+	}
+
+	// only flag non-nested attributes as mandatory, nested attributes have variant syntax
+	// that can't be properly constrained in XSD
+	// e.g. <foo mandatory.value="bar"/> vs <foo><mandatory value="bar"/></foo>
+	bool attribute_mandatory = min_count == 1 && max_count == 1 && non_empty_names.size() == 1;
+
+	// don't bother supporting "Multiple" params as xml attributes
+	if (max_count <= 1)
+	{
+		// add compound attribute to root node
+		addAttributeToSchema(mAttributeNode, attribute_name, type, attribute_mandatory, possible_values);
+	}
+
+	// now generated nested elements for compound attributes
+	if (non_empty_names.size() > 1 && !attribute_mandatory)
+	{
+		std::string element_name;
+
+		// traverse all but last element, leaving that as an attribute name
+		name_stack_t::const_iterator end_it = non_empty_names.end();
+		end_it--;
+
+		for (name_stack_t::const_iterator it = non_empty_names.begin();
+			it != end_it;
+			++it)
+		{
+			if (it != non_empty_names.begin())
+			{
+				element_name += ".";
+			}
+			element_name += it->first;
+		}
+
+		std::string short_attribute_name = non_empty_names.back().first;
+
+		LLXMLNodePtr complex_type_node;
+
+		// find existing element node here, starting at tail of child list
+		if (mElementNode->mChildren.notNull())
+		{
+			for(LLXMLNodePtr element = mElementNode->mChildren->tail;
+				element.notNull(); 
+				element = element->mPrev)
+			{
+				std::string name;
+				if(element->getAttributeString("name", name) && name == element_name)
+				{
+					complex_type_node = element->mChildren->head;
+					break;
+				}
+			}
+		}
+		//create complex_type node
+		//
+		//<xs:element
+        //    maxOccurs="1"
+        //    minOccurs="0"
+        //    name="name">
+        //       <xs:complexType>
+        //       </xs:complexType>
+        //</xs:element>
+		if(complex_type_node.isNull())
+		{
+			complex_type_node = mElementNode->createChild("xs:element", false);
+
+			complex_type_node->createChild("minOccurs", true)->setIntValue(min_count);
+			complex_type_node->createChild("maxOccurs", true)->setIntValue(max_count);
+			complex_type_node->createChild("name",		true)->setStringValue(element_name);
+			complex_type_node = complex_type_node->createChild("xs:complexType", false);
+		}
+
+		addAttributeToSchema(complex_type_node, short_attribute_name, type, false, possible_values);
+	}
+}
+
+void LLXSDWriter::addAttributeToSchema(LLXMLNodePtr type_declaration_node, const std::string& attribute_name, const std::string& type, bool mandatory, const std::vector<std::string>* possible_values)
+{
+	if (!attribute_name.empty())
+	{
+		LLXMLNodePtr new_enum_type_node;
+		if (possible_values != NULL)
+		{
+			// custom attribute type, for example
+			//<xs:simpleType>
+			 // <xs:restriction
+			 //    base="xs:string">
+			 //     <xs:enumeration
+			 //      value="a" />
+			 //     <xs:enumeration
+			 //      value="b" />
+			 //   </xs:restriction>
+			 // </xs:simpleType>
+			new_enum_type_node = new LLXMLNode("xs:simpleType", false);
+
+			LLXMLNodePtr restriction_node = new_enum_type_node->createChild("xs:restriction", false);
+			restriction_node->createChild("base", true)->setStringValue("xs:string");
+
+			for (std::vector<std::string>::const_iterator it = possible_values->begin();
+				it != possible_values->end();
+				++it)
+			{
+				LLXMLNodePtr enum_node = restriction_node->createChild("xs:enumeration", false);
+				enum_node->createChild("value", true)->setStringValue(*it);
+			}
+		}
+
+		string_set_t& attributes_written = mAttributesWritten[type_declaration_node];
+
+		string_set_t::iterator found_it = attributes_written.lower_bound(attribute_name);
+
+		// attribute not yet declared
+		if (found_it == attributes_written.end() || attributes_written.key_comp()(attribute_name, *found_it))
+		{
+			attributes_written.insert(found_it, attribute_name);
+
+			LLXMLNodePtr attribute_node = type_declaration_node->createChild("xs:attribute", false);
+
+			// attribute name
+			attribute_node->createChild("name", true)->setStringValue(attribute_name);
+
+			if (new_enum_type_node.notNull())
+			{
+				attribute_node->addChild(new_enum_type_node);
+			}
+			else
+			{
+				// simple attribute type
+				attribute_node->createChild("type", true)->setStringValue(type);
+			}
+
+			// required or optional
+			attribute_node->createChild("use", true)->setStringValue(mandatory ? "required" : "optional");
+		}
+		 // attribute exists...handle collision of same name attributes with potentially different types
+		else
+		{
+			LLXMLNodePtr attribute_declaration;
+			if (type_declaration_node.notNull())
+			{
+				for(LLXMLNodePtr node = type_declaration_node->mChildren->tail; 
+					node.notNull(); 
+					node = node->mPrev)
+				{
+					std::string name;
+					if (node->getAttributeString("name", name) && name == attribute_name)
+					{
+						attribute_declaration = node;
+						break;
+					}
+				}
+			}
+
+			bool new_type_is_enum = new_enum_type_node.notNull();
+			bool existing_type_is_enum = !attribute_declaration->hasAttribute("type");
+
+			// either type is enum, revert to string in collision
+			// don't bother to check for enum equivalence
+			if (new_type_is_enum || existing_type_is_enum)
+			{
+				if (attribute_declaration->hasAttribute("type"))
+				{
+					attribute_declaration->setAttributeString("type", "xs:string");
+				}
+				else
+				{
+					attribute_declaration->createChild("type", true)->setStringValue("xs:string");
+				}
+				attribute_declaration->deleteChildren("xs:simpleType");
+			}
+			else 
+			{
+				// check for collision of different standard types
+				std::string existing_type;
+				attribute_declaration->getAttributeString("type", existing_type);
+				// if current type is not the same as the new type, revert to strnig
+				if (existing_type != type)
+				{
+					// ...than use most general type, string
+					attribute_declaration->setAttributeString("type", "string");
+				}
+			}
+		}
+	}
+}
+
+//
+// LLXUIXSDWriter
+//
+void LLXUIXSDWriter::writeXSD(const std::string& type_name, const std::string& path, const LLInitParam::BaseBlock& block)
+{
+	std::string file_name(path);
+	file_name += type_name + ".xsd";
+	LLXMLNodePtr root_nodep = new LLXMLNode();
+
+	LLXSDWriter::writeXSD(type_name, root_nodep, block, "http://www.lindenlab.com/xui");
+
+	// add includes for all possible children
+	const std::type_info* type = *LLWidgetTypeRegistry::instance().getValue(type_name);
+	const widget_registry_t* widget_registryp = LLChildRegistryRegistry::instance().getValue(type);
+
+	// add choices for valid children
+	if (widget_registryp)
+	{
+		// add include declarations for all valid children
+		for (widget_registry_t::Registrar::registry_map_t::const_iterator it = widget_registryp->currentRegistrar().beginItems();
+		     it != widget_registryp->currentRegistrar().endItems();
+		     ++it)
+		{
+			std::string widget_name = it->first;
+			if (widget_name == type_name)
+			{
+				continue;
+			}
+			LLXMLNodePtr nodep = new LLXMLNode("xs:include", false);
+			nodep->createChild("schemaLocation", true)->setStringValue(widget_name + ".xsd");
+			
+			// add to front of schema
+			mSchemaNode->addChild(nodep);
+		}
+
+		for (widget_registry_t::Registrar::registry_map_t::const_iterator it = widget_registryp->currentRegistrar().beginItems();
+			it != widget_registryp->currentRegistrar().endItems();
+			++it)
+		{
+			std::string widget_name = it->first;
+			//<xs:element name="widget_name" type="widget_name">
+			LLXMLNodePtr widget_node = mElementNode->createChild("xs:element", false);
+			widget_node->createChild("name", true)->setStringValue(widget_name);
+			widget_node->createChild("type", true)->setStringValue(widget_name);
+		}
+	}
+
+	LLFILE* xsd_file = LLFile::fopen(file_name.c_str(), "w");
+	LLXMLNode::writeHeaderToFile(xsd_file);
+	root_nodep->writeToFile(xsd_file);
+	fclose(xsd_file);
+}
+
+static 	LLInitParam::Parser::parser_read_func_map_t sXUIReadFuncs;
+static 	LLInitParam::Parser::parser_write_func_map_t sXUIWriteFuncs;
+static 	LLInitParam::Parser::parser_inspect_func_map_t sXUIInspectFuncs;
+
+//
+// LLXUIParser
+//
+LLXUIParser::LLXUIParser()
+:	Parser(sXUIReadFuncs, sXUIWriteFuncs, sXUIInspectFuncs),
+	mCurReadDepth(0)
+{
+	if (sXUIReadFuncs.empty())
+	{
+		registerParserFuncs<LLInitParam::Flag>(readFlag, writeFlag);
+		registerParserFuncs<bool>(readBoolValue, writeBoolValue);
+		registerParserFuncs<std::string>(readStringValue, writeStringValue);
+		registerParserFuncs<U8>(readU8Value, writeU8Value);
+		registerParserFuncs<S8>(readS8Value, writeS8Value);
+		registerParserFuncs<U16>(readU16Value, writeU16Value);
+		registerParserFuncs<S16>(readS16Value, writeS16Value);
+		registerParserFuncs<U32>(readU32Value, writeU32Value);
+		registerParserFuncs<S32>(readS32Value, writeS32Value);
+		registerParserFuncs<F32>(readF32Value, writeF32Value);
+		registerParserFuncs<F64>(readF64Value, writeF64Value);
+		registerParserFuncs<LLVector3>(readVector3Value, writeVector3Value);
+		registerParserFuncs<LLColor4>(readColor4Value, writeColor4Value);
+		registerParserFuncs<LLUIColor>(readUIColorValue, writeUIColorValue);
+		registerParserFuncs<LLUUID>(readUUIDValue, writeUUIDValue);
+		registerParserFuncs<LLSD>(readSDValue, writeSDValue);
+	}
+}
+
+static LLFastTimer::DeclareTimer FTM_PARSE_XUI("XUI Parsing");
+const LLXMLNodePtr DUMMY_NODE = new LLXMLNode();
+
+void LLXUIParser::readXUI(LLXMLNodePtr node, LLInitParam::BaseBlock& block, const std::string& filename, bool silent)
+{
+	LLFastTimer timer(FTM_PARSE_XUI);
+	mNameStack.clear();
+	mRootNodeName = node->getName()->mString;
+	mCurFileName = filename;
+	mCurReadDepth = 0;
+	setParseSilently(silent);
+
+	if (node.isNull())
+	{
+		parserWarning("Invalid node");
+	}
+	else
+	{
+		readXUIImpl(node, block);
+	}
+}
+
+bool LLXUIParser::readXUIImpl(LLXMLNodePtr nodep, LLInitParam::BaseBlock& block)
+{
+	typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
+	boost::char_separator<char> sep(".");
+
+	bool values_parsed = false;
+	bool silent = mCurReadDepth > 0;
+
+	if (nodep->getFirstChild().isNull() 
+		&& nodep->mAttributes.empty() 
+		&& nodep->getSanitizedValue().empty())
+	{
+		// empty node, just parse as flag
+		mCurReadNode = DUMMY_NODE;
+		return block.submitValue(mNameStack, *this, silent);
+	}
+
+	// submit attributes for current node
+	values_parsed |= readAttributes(nodep, block);
+
+	// treat text contents of xml node as "value" parameter
+	std::string text_contents = nodep->getSanitizedValue();
+	if (!text_contents.empty())
+	{
+		mCurReadNode = nodep;
+		mNameStack.push_back(std::make_pair(std::string("value"), true));
+		// child nodes are not necessarily valid parameters (could be a child widget)
+		// so don't complain once we've recursed
+		if (!block.submitValue(mNameStack, *this, true))
+		{
+			mNameStack.pop_back();
+			block.submitValue(mNameStack, *this, silent);
+		}
+		else
+		{
+			mNameStack.pop_back();
+		}
+	}
+
+	// then traverse children
+	// child node must start with last name of parent node (our "scope")
+	// for example: "<button><button.param nested_param1="foo"><param.nested_param2 nested_param3="bar"/></button.param></button>"
+	// which equates to the following nesting:
+	// button
+	//     param
+	//         nested_param1
+	//         nested_param2
+	//             nested_param3	
+	mCurReadDepth++;
+	for(LLXMLNodePtr childp = nodep->getFirstChild(); childp.notNull();)
+	{
+		std::string child_name(childp->getName()->mString);
+		S32 num_tokens_pushed = 0;
+
+		// for non "dotted" child nodes	check to see if child node maps to another widget type
+		// and if not, treat as a child element of the current node
+		// e.g. <button><rect left="10"/></button> will interpret <rect> as "button.rect"
+		// since there is no widget named "rect"
+		if (child_name.find(".") == std::string::npos) 
+		{
+			mNameStack.push_back(std::make_pair(child_name, true));
+			num_tokens_pushed++;
+		}
+		else
+		{
+			// parse out "dotted" name into individual tokens
+			tokenizer name_tokens(child_name, sep);
+
+			tokenizer::iterator name_token_it = name_tokens.begin();
+			if(name_token_it == name_tokens.end()) 
+			{
+				childp = childp->getNextSibling();
+				continue;
+			}
+
+			// check for proper nesting
+			if (mNameStack.empty())
+			{
+				if (*name_token_it != mRootNodeName)
+				{
+					childp = childp->getNextSibling();
+					continue;
+				}
+			}
+			else if(mNameStack.back().first != *name_token_it)
+			{
+				childp = childp->getNextSibling();
+				continue;
+			}
+
+			// now ignore first token
+			++name_token_it; 
+
+			// copy remaining tokens on to our running token list
+			for(tokenizer::iterator token_to_push = name_token_it; token_to_push != name_tokens.end(); ++token_to_push)
+			{
+				mNameStack.push_back(std::make_pair(*token_to_push, true));
+				num_tokens_pushed++;
+			}
+		}
+
+		// recurse and visit children XML nodes
+		if(readXUIImpl(childp, block))
+		{
+			// child node successfully parsed, remove from DOM
+
+			values_parsed = true;
+			LLXMLNodePtr node_to_remove = childp;
+			childp = childp->getNextSibling();
+
+			nodep->deleteChild(node_to_remove);
+		}
+		else
+		{
+			childp = childp->getNextSibling();
+		}
+
+		while(num_tokens_pushed-- > 0)
+		{
+			mNameStack.pop_back();
+		}
+	}
+	mCurReadDepth--;
+	return values_parsed;
+}
+
+bool LLXUIParser::readAttributes(LLXMLNodePtr nodep, LLInitParam::BaseBlock& block)
+{
+	typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
+	boost::char_separator<char> sep(".");
+
+	bool any_parsed = false;
+	bool silent = mCurReadDepth > 0;
+
+	for(LLXMLAttribList::const_iterator attribute_it = nodep->mAttributes.begin(); 
+		attribute_it != nodep->mAttributes.end(); 
+		++attribute_it)
+	{
+		S32 num_tokens_pushed = 0;
+		std::string attribute_name(attribute_it->first->mString);
+		mCurReadNode = attribute_it->second;
+
+		tokenizer name_tokens(attribute_name, sep);
+		// copy remaining tokens on to our running token list
+		for(tokenizer::iterator token_to_push = name_tokens.begin(); token_to_push != name_tokens.end(); ++token_to_push)
+		{
+			mNameStack.push_back(std::make_pair(*token_to_push, true));
+			num_tokens_pushed++;
+		}
+
+		// child nodes are not necessarily valid attributes, so don't complain once we've recursed
+		any_parsed |= block.submitValue(mNameStack, *this, silent);
+		
+		while(num_tokens_pushed-- > 0)
+		{
+			mNameStack.pop_back();
+		}
+	}
+
+	return any_parsed;
+}
+
+void LLXUIParser::writeXUI(LLXMLNodePtr node, const LLInitParam::BaseBlock &block, const LLInitParam::BaseBlock* diff_block)
+{
+	mWriteRootNode = node;
+	name_stack_t name_stack = Parser::name_stack_t();
+	block.serializeBlock(*this, name_stack, diff_block);
+	mOutNodes.clear();
+}
+
+// go from a stack of names to a specific XML node
+LLXMLNodePtr LLXUIParser::getNode(name_stack_t& stack)
+{
+	LLXMLNodePtr out_node = mWriteRootNode;
+
+	name_stack_t::iterator next_it = stack.begin();
+	for (name_stack_t::iterator it = stack.begin();
+		it != stack.end();
+		it = next_it)
+	{
+		++next_it;
+		bool force_new_node = false;
+
+		if (it->first.empty())
+		{
+			it->second = false;
+			continue;
+		}
+
+		if (next_it != stack.end() && next_it->first.empty() && next_it->second)
+		{
+			force_new_node = true;
+		}
+
+
+		out_nodes_t::iterator found_it = mOutNodes.find(it->first);
+
+		// node with this name not yet written
+		if (found_it == mOutNodes.end() || it->second || force_new_node)
+		{
+			// make an attribute if we are the last element on the name stack
+			bool is_attribute = next_it == stack.end();
+			LLXMLNodePtr new_node = new LLXMLNode(it->first.c_str(), is_attribute);
+			out_node->addChild(new_node);
+			mOutNodes[it->first] = new_node;
+			out_node = new_node;
+			it->second = false;
+		}
+		else
+		{
+			out_node = found_it->second;
+		}
+	}
+
+	return (out_node == mWriteRootNode ? LLXMLNodePtr(NULL) : out_node);
+}
+
+bool LLXUIParser::readFlag(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	return self.mCurReadNode == DUMMY_NODE;
+}
+
+bool LLXUIParser::writeFlag(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	// just create node
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	return node.notNull();
+}
+
+bool LLXUIParser::readBoolValue(Parser& parser, void* val_ptr)
+{
+	S32 value;
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	bool success = self.mCurReadNode->getBoolValue(1, &value);
+	*((bool*)val_ptr) = (value != FALSE);
+	return success;
+}
+
+bool LLXUIParser::writeBoolValue(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		node->setBoolValue(*((bool*)val_ptr));
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readStringValue(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	*((std::string*)val_ptr) = self.mCurReadNode->getSanitizedValue();
+	return true;
+}
+
+bool LLXUIParser::writeStringValue(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		const std::string* string_val = reinterpret_cast<const std::string*>(val_ptr);
+		if (string_val->find('\n') != std::string::npos 
+			|| string_val->size() > MAX_STRING_ATTRIBUTE_SIZE)
+		{
+			// don't write strings with newlines into attributes
+			std::string attribute_name = node->getName()->mString;
+			LLXMLNodePtr parent_node = node->mParent;
+			parent_node->deleteChild(node);
+			// write results in text contents of node
+			if (attribute_name == "value")
+			{
+				// "value" is implicit, just write to parent
+				node = parent_node;
+			}
+			else
+			{
+				// create a child that is not an attribute, but with same name
+				node = parent_node->createChild(attribute_name.c_str(), false);
+			}
+		}
+		node->setStringValue(*string_val);
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readU8Value(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	return self.mCurReadNode->getByteValue(1, (U8*)val_ptr);
+}
+
+bool LLXUIParser::writeU8Value(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		node->setUnsignedValue(*((U8*)val_ptr));
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readS8Value(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	S32 value;
+	if(self.mCurReadNode->getIntValue(1, &value))
+	{
+		*((S8*)val_ptr) = value;
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::writeS8Value(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		node->setIntValue(*((S8*)val_ptr));
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readU16Value(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	U32 value;
+	if(self.mCurReadNode->getUnsignedValue(1, &value))
+	{
+		*((U16*)val_ptr) = value;
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::writeU16Value(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		node->setUnsignedValue(*((U16*)val_ptr));
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readS16Value(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	S32 value;
+	if(self.mCurReadNode->getIntValue(1, &value))
+	{
+		*((S16*)val_ptr) = value;
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::writeS16Value(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		node->setIntValue(*((S16*)val_ptr));
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readU32Value(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	return self.mCurReadNode->getUnsignedValue(1, (U32*)val_ptr);
+}
+
+bool LLXUIParser::writeU32Value(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		node->setUnsignedValue(*((U32*)val_ptr));
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readS32Value(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	return self.mCurReadNode->getIntValue(1, (S32*)val_ptr);
+}
+
+bool LLXUIParser::writeS32Value(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		node->setIntValue(*((S32*)val_ptr));
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readF32Value(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	return self.mCurReadNode->getFloatValue(1, (F32*)val_ptr);
+}
+
+bool LLXUIParser::writeF32Value(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		node->setFloatValue(*((F32*)val_ptr));
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readF64Value(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	return self.mCurReadNode->getDoubleValue(1, (F64*)val_ptr);
+}
+
+bool LLXUIParser::writeF64Value(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		node->setDoubleValue(*((F64*)val_ptr));
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readVector3Value(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLVector3* vecp = (LLVector3*)val_ptr;
+	if(self.mCurReadNode->getFloatValue(3, vecp->mV) >= 3)
+	{
+		return true;
+	}
+
+	return false;
+}
+
+bool LLXUIParser::writeVector3Value(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		LLVector3 vector = *((LLVector3*)val_ptr);
+		node->setFloatValue(3, vector.mV);
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readColor4Value(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLColor4* colorp = (LLColor4*)val_ptr;
+	if(self.mCurReadNode->getFloatValue(4, colorp->mV) >= 3)
+	{
+		return true;
+	}
+
+	return false;
+}
+
+bool LLXUIParser::writeColor4Value(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		LLColor4 color = *((LLColor4*)val_ptr);
+		node->setFloatValue(4, color.mV);
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readUIColorValue(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLUIColor* param = (LLUIColor*)val_ptr;
+	LLColor4 color;
+	bool success =  self.mCurReadNode->getFloatValue(4, color.mV) >= 3;
+	if (success)
+	{
+		param->set(color);
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::writeUIColorValue(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		LLUIColor color = *((LLUIColor*)val_ptr);
+		//RN: don't write out the color that is represented by a function
+		// rely on param block exporting to get the reference to the color settings
+		if (color.isReference()) return false;
+		node->setFloatValue(4, color.get().mV);
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readUUIDValue(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLUUID temp_id;
+	// LLUUID::set is destructive, so use temporary value
+	if (temp_id.set(self.mCurReadNode->getSanitizedValue()))
+	{
+		*(LLUUID*)(val_ptr) = temp_id;
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::writeUUIDValue(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		node->setStringValue(((LLUUID*)val_ptr)->asString());
+		return true;
+	}
+	return false;
+}
+
+bool LLXUIParser::readSDValue(Parser& parser, void* val_ptr)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+	*((LLSD*)val_ptr) = LLSD(self.mCurReadNode->getSanitizedValue());
+	return true;
+}
+
+bool LLXUIParser::writeSDValue(Parser& parser, const void* val_ptr, name_stack_t& stack)
+{
+	LLXUIParser& self = static_cast<LLXUIParser&>(parser);
+
+	LLXMLNodePtr node = self.getNode(stack);
+	if (node.notNull())
+	{
+		std::string string_val = ((LLSD*)val_ptr)->asString();
+		if (string_val.find('\n') != std::string::npos || string_val.size() > MAX_STRING_ATTRIBUTE_SIZE)
+		{
+			// don't write strings with newlines into attributes
+			std::string attribute_name = node->getName()->mString;
+			LLXMLNodePtr parent_node = node->mParent;
+			parent_node->deleteChild(node);
+			// write results in text contents of node
+			if (attribute_name == "value")
+			{
+				// "value" is implicit, just write to parent
+				node = parent_node;
+			}
+			else
+			{
+				node = parent_node->createChild(attribute_name.c_str(), false);
+			}
+		}
+
+		node->setStringValue(string_val);
+		return true;
+	}
+	return false;
+}
+
+/*virtual*/ std::string LLXUIParser::getCurrentElementName()
+{
+	std::string full_name;
+	for (name_stack_t::iterator it = mNameStack.begin();	
+		it != mNameStack.end();
+		++it)
+	{
+		full_name += it->first + "."; // build up dotted names: "button.param.nestedparam."
+	}
+
+	return full_name;
+}
+
+void LLXUIParser::parserWarning(const std::string& message)
+{
+#ifdef LL_WINDOWS
+	// use Visual Studo friendly formatting of output message for easy access to originating xml
+	llutf16string utf16str = utf8str_to_utf16str(llformat("%s(%d):\t%s", mCurFileName.c_str(), mCurReadNode->getLineNumber(), message.c_str()).c_str());
+	utf16str += '\n';
+	OutputDebugString(utf16str.c_str());
+#else
+	Parser::parserWarning(message);
+#endif
+}
+
+void LLXUIParser::parserError(const std::string& message)
+{
+#ifdef LL_WINDOWS
+	llutf16string utf16str = utf8str_to_utf16str(llformat("%s(%d):\t%s", mCurFileName.c_str(), mCurReadNode->getLineNumber(), message.c_str()).c_str());
+	utf16str += '\n';
+	OutputDebugString(utf16str.c_str());
+#else
+	Parser::parserError(message);
+#endif
+}
+
+
+//
+// LLSimpleXUIParser
+//
+
+struct ScopedFile
+{
+	ScopedFile( const std::string& filename, const char* accessmode )
+	{
+		mFile = LLFile::fopen(filename, accessmode);
+	}
+
+	~ScopedFile()
+	{
+		fclose(mFile);
+		mFile = NULL;
+	}
+
+	S32 getRemainingBytes()
+	{
+		if (!isOpen()) return 0;
+
+		S32 cur_pos = ftell(mFile);
+		fseek(mFile, 0L, SEEK_END);
+		S32 file_size = ftell(mFile);
+		fseek(mFile, cur_pos, SEEK_SET);
+		return file_size - cur_pos;
+	}
+
+	bool isOpen() { return mFile != NULL; }
+
+	LLFILE* mFile;
+};
+LLSimpleXUIParser::LLSimpleXUIParser(LLSimpleXUIParser::element_start_callback_t element_cb)
+:	Parser(sSimpleXUIReadFuncs, sSimpleXUIWriteFuncs, sSimpleXUIInspectFuncs),
+	mCurReadDepth(0),
+	mElementCB(element_cb)
+{
+	if (sSimpleXUIReadFuncs.empty())
+	{
+		registerParserFuncs<LLInitParam::Flag>(readFlag);
+		registerParserFuncs<bool>(readBoolValue);
+		registerParserFuncs<std::string>(readStringValue);
+		registerParserFuncs<U8>(readU8Value);
+		registerParserFuncs<S8>(readS8Value);
+		registerParserFuncs<U16>(readU16Value);
+		registerParserFuncs<S16>(readS16Value);
+		registerParserFuncs<U32>(readU32Value);
+		registerParserFuncs<S32>(readS32Value);
+		registerParserFuncs<F32>(readF32Value);
+		registerParserFuncs<F64>(readF64Value);
+		registerParserFuncs<LLColor4>(readColor4Value);
+		registerParserFuncs<LLUIColor>(readUIColorValue);
+		registerParserFuncs<LLUUID>(readUUIDValue);
+		registerParserFuncs<LLSD>(readSDValue);
+	}
+}
+
+LLSimpleXUIParser::~LLSimpleXUIParser()
+{
+}
+
+
+bool LLSimpleXUIParser::readXUI(const std::string& filename, LLInitParam::BaseBlock& block, bool silent)
+{
+	LLFastTimer timer(FTM_PARSE_XUI);
+
+	mParser = XML_ParserCreate(NULL);
+	XML_SetUserData(mParser, this);
+	XML_SetElementHandler(			mParser,	startElementHandler, endElementHandler);
+	XML_SetCharacterDataHandler(	mParser,	characterDataHandler);
+
+	mOutputStack.push_back(std::make_pair(&block, 0));
+	mNameStack.clear();
+	mCurFileName = filename;
+	mCurReadDepth = 0;
+	setParseSilently(silent);
+
+	ScopedFile file(filename, "rb");
+	if( !file.isOpen() )
+	{
+		LL_WARNS("ReadXUI") << "Unable to open file " << filename << LL_ENDL;
+		XML_ParserFree( mParser );
+		return false;
+	}
+
+	S32 bytes_read = 0;
+	
+	S32 buffer_size = file.getRemainingBytes();
+	void* buffer = XML_GetBuffer(mParser, buffer_size);
+	if( !buffer ) 
+	{
+		LL_WARNS("ReadXUI") << "Unable to allocate XML buffer while reading file " << filename << LL_ENDL;
+		XML_ParserFree( mParser );
+		return false;
+	}
+
+	bytes_read = (S32)fread(buffer, 1, buffer_size, file.mFile);
+	if( bytes_read <= 0 )
+	{
+		LL_WARNS("ReadXUI") << "Error while reading file  " << filename << LL_ENDL;
+		XML_ParserFree( mParser );
+		return false;
+	}
+	
+	mEmptyLeafNode.push_back(false);
+
+	if( !XML_ParseBuffer(mParser, bytes_read, TRUE ) )
+	{
+		LL_WARNS("ReadXUI") << "Error while parsing file  " << filename << LL_ENDL;
+		XML_ParserFree( mParser );
+		return false;
+	}
+
+	mEmptyLeafNode.pop_back();
+
+	XML_ParserFree( mParser );
+	return true;
+}
+
+void LLSimpleXUIParser::startElementHandler(void *userData, const char *name, const char **atts)
+{
+	LLSimpleXUIParser* self = reinterpret_cast<LLSimpleXUIParser*>(userData);
+	self->startElement(name, atts);
+}
+
+void LLSimpleXUIParser::endElementHandler(void *userData, const char *name)
+{
+	LLSimpleXUIParser* self = reinterpret_cast<LLSimpleXUIParser*>(userData);
+	self->endElement(name);
+}
+
+void LLSimpleXUIParser::characterDataHandler(void *userData, const char *s, int len)
+{
+	LLSimpleXUIParser* self = reinterpret_cast<LLSimpleXUIParser*>(userData);
+	self->characterData(s, len);
+}
+
+void LLSimpleXUIParser::characterData(const char *s, int len)
+{
+	mTextContents += std::string(s, len);
+}
+
+void LLSimpleXUIParser::startElement(const char *name, const char **atts)
+{
+	processText();
+
+	typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
+	boost::char_separator<char> sep(".");
+
+	if (mElementCB) 
+	{
+		LLInitParam::BaseBlock* blockp = mElementCB(*this, name);
+		if (blockp)
+		{
+			mOutputStack.push_back(std::make_pair(blockp, 0));
+		}
+	}
+
+	mOutputStack.back().second++;
+	S32 num_tokens_pushed = 0;
+	std::string child_name(name);
+
+	if (mOutputStack.back().second == 1)
+	{	// root node for this block
+		mScope.push_back(child_name);
+	}
+	else
+	{	// compound attribute
+		if (child_name.find(".") == std::string::npos) 
+		{
+			mNameStack.push_back(std::make_pair(child_name, true));
+			num_tokens_pushed++;
+			mScope.push_back(child_name);
+		}
+		else
+		{
+			// parse out "dotted" name into individual tokens
+			tokenizer name_tokens(child_name, sep);
+
+			tokenizer::iterator name_token_it = name_tokens.begin();
+			if(name_token_it == name_tokens.end()) 
+			{
+				return;
+			}
+
+			// check for proper nesting
+			if(!mScope.empty() && *name_token_it != mScope.back())
+			{
+				return;
+			}
+
+			// now ignore first token
+			++name_token_it; 
+
+			// copy remaining tokens on to our running token list
+			for(tokenizer::iterator token_to_push = name_token_it; token_to_push != name_tokens.end(); ++token_to_push)
+			{
+				mNameStack.push_back(std::make_pair(*token_to_push, true));
+				num_tokens_pushed++;
+			}
+			mScope.push_back(mNameStack.back().first);
+		}
+	}
+
+	// parent node is not empty
+	mEmptyLeafNode.back() = false;
+	// we are empty if we have no attributes
+	mEmptyLeafNode.push_back(atts[0] == NULL);
+
+	mTokenSizeStack.push_back(num_tokens_pushed);
+	readAttributes(atts);
+
+}
+
+void LLSimpleXUIParser::endElement(const char *name)
+{
+	bool has_text = processText();
+
+	// no text, attributes, or children
+	if (!has_text && mEmptyLeafNode.back())
+	{
+		// submit this as a valueless name (even though there might be text contents we haven't seen yet)
+		mCurAttributeValueBegin = NO_VALUE_MARKER;
+		mOutputStack.back().first->submitValue(mNameStack, *this, mParseSilently);
+	}
+
+	if (--mOutputStack.back().second == 0)
+	{
+		if (mOutputStack.empty())
+		{
+			LL_ERRS("ReadXUI") << "Parameter block output stack popped while empty." << LL_ENDL;
+		}
+		mOutputStack.pop_back();
+	}
+
+	S32 num_tokens_to_pop = mTokenSizeStack.back();
+	mTokenSizeStack.pop_back();
+	while(num_tokens_to_pop-- > 0)
+	{
+		mNameStack.pop_back();
+	}
+	mScope.pop_back();
+	mEmptyLeafNode.pop_back();
+}
+
+bool LLSimpleXUIParser::readAttributes(const char **atts)
+{
+	typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
+	boost::char_separator<char> sep(".");
+
+	bool any_parsed = false;
+	for(S32 i = 0; atts[i] && atts[i+1]; i += 2 )
+	{
+		std::string attribute_name(atts[i]);
+		mCurAttributeValueBegin = atts[i+1];
+		
+		S32 num_tokens_pushed = 0;
+		tokenizer name_tokens(attribute_name, sep);
+		// copy remaining tokens on to our running token list
+		for(tokenizer::iterator token_to_push = name_tokens.begin(); token_to_push != name_tokens.end(); ++token_to_push)
+		{
+			mNameStack.push_back(std::make_pair(*token_to_push, true));
+			num_tokens_pushed++;
+		}
+
+		// child nodes are not necessarily valid attributes, so don't complain once we've recursed
+		any_parsed |= mOutputStack.back().first->submitValue(mNameStack, *this, mParseSilently);
+		
+		while(num_tokens_pushed-- > 0)
+		{
+			mNameStack.pop_back();
+		}
+	}
+	return any_parsed;
+}
+
+bool LLSimpleXUIParser::processText()
+{
+	if (!mTextContents.empty())
+	{
+		LLStringUtil::trim(mTextContents);
+		if (!mTextContents.empty())
+		{
+			mNameStack.push_back(std::make_pair(std::string("value"), true));
+			mCurAttributeValueBegin = mTextContents.c_str();
+			mOutputStack.back().first->submitValue(mNameStack, *this, mParseSilently);
+			mNameStack.pop_back();
+		}
+		mTextContents.clear();
+		return true;
+	}
+	return false;
+}
+
+/*virtual*/ std::string LLSimpleXUIParser::getCurrentElementName()
+{
+	std::string full_name;
+	for (name_stack_t::iterator it = mNameStack.begin();	
+		it != mNameStack.end();
+		++it)
+	{
+		full_name += it->first + "."; // build up dotted names: "button.param.nestedparam."
+	}
+
+	return full_name;
+}
+
+void LLSimpleXUIParser::parserWarning(const std::string& message)
+{
+#ifdef LL_WINDOWS
+	// use Visual Studo friendly formatting of output message for easy access to originating xml
+	llutf16string utf16str = utf8str_to_utf16str(llformat("%s(%d):\t%s", mCurFileName.c_str(), LINE_NUMBER_HERE, message.c_str()).c_str());
+	utf16str += '\n';
+	OutputDebugString(utf16str.c_str());
+#else
+	Parser::parserWarning(message);
+#endif
+}
+
+void LLSimpleXUIParser::parserError(const std::string& message)
+{
+#ifdef LL_WINDOWS
+	llutf16string utf16str = utf8str_to_utf16str(llformat("%s(%d):\t%s", mCurFileName.c_str(), LINE_NUMBER_HERE, message.c_str()).c_str());
+	utf16str += '\n';
+	OutputDebugString(utf16str.c_str());
+#else
+	Parser::parserError(message);
+#endif
+}
+
+bool LLSimpleXUIParser::readFlag(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	return self.mCurAttributeValueBegin == NO_VALUE_MARKER;
+}
+
+bool LLSimpleXUIParser::readBoolValue(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	if (!strcmp(self.mCurAttributeValueBegin, "true")) 
+	{
+		*((bool*)val_ptr) = true;
+		return true;
+	}
+	else if (!strcmp(self.mCurAttributeValueBegin, "false"))
+	{
+		*((bool*)val_ptr) = false;
+		return true;
+	}
+
+	return false;
+}
+
+bool LLSimpleXUIParser::readStringValue(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	*((std::string*)val_ptr) = self.mCurAttributeValueBegin;
+	return true;
+}
+
+bool LLSimpleXUIParser::readU8Value(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	return parse(self.mCurAttributeValueBegin, uint_p[assign_a(*(U8*)val_ptr)]).full;
+}
+
+bool LLSimpleXUIParser::readS8Value(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	return parse(self.mCurAttributeValueBegin, int_p[assign_a(*(S8*)val_ptr)]).full;
+}
+
+bool LLSimpleXUIParser::readU16Value(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	return parse(self.mCurAttributeValueBegin, uint_p[assign_a(*(U16*)val_ptr)]).full;
+}
+
+bool LLSimpleXUIParser::readS16Value(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	return parse(self.mCurAttributeValueBegin, int_p[assign_a(*(S16*)val_ptr)]).full;
+}
+
+bool LLSimpleXUIParser::readU32Value(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	return parse(self.mCurAttributeValueBegin, uint_p[assign_a(*(U32*)val_ptr)]).full;
+}
+
+bool LLSimpleXUIParser::readS32Value(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	return parse(self.mCurAttributeValueBegin, int_p[assign_a(*(S32*)val_ptr)]).full;
+}
+
+bool LLSimpleXUIParser::readF32Value(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	return parse(self.mCurAttributeValueBegin, real_p[assign_a(*(F32*)val_ptr)]).full;
+}
+
+bool LLSimpleXUIParser::readF64Value(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	return parse(self.mCurAttributeValueBegin, real_p[assign_a(*(F64*)val_ptr)]).full;
+}
+	
+bool LLSimpleXUIParser::readColor4Value(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	LLColor4 value;
+
+	if (parse(self.mCurAttributeValueBegin, real_p[assign_a(value.mV[0])] >> real_p[assign_a(value.mV[1])] >> real_p[assign_a(value.mV[2])] >> real_p[assign_a(value.mV[3])], space_p).full)
+	{
+		*(LLColor4*)(val_ptr) = value;
+		return true;
+	}
+	return false;
+}
+
+bool LLSimpleXUIParser::readUIColorValue(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	LLColor4 value;
+	LLUIColor* colorp = (LLUIColor*)val_ptr;
+
+	if (parse(self.mCurAttributeValueBegin, real_p[assign_a(value.mV[0])] >> real_p[assign_a(value.mV[1])] >> real_p[assign_a(value.mV[2])] >> real_p[assign_a(value.mV[3])], space_p).full)
+	{
+		colorp->set(value);
+		return true;
+	}
+	return false;
+}
+
+bool LLSimpleXUIParser::readUUIDValue(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	LLUUID temp_id;
+	// LLUUID::set is destructive, so use temporary value
+	if (temp_id.set(std::string(self.mCurAttributeValueBegin)))
+	{
+		*(LLUUID*)(val_ptr) = temp_id;
+		return true;
+	}
+	return false;
+}
+
+bool LLSimpleXUIParser::readSDValue(Parser& parser, void* val_ptr)
+{
+	LLSimpleXUIParser& self = static_cast<LLSimpleXUIParser&>(parser);
+	*((LLSD*)val_ptr) = LLSD(self.mCurAttributeValueBegin);
+	return true;
+}
diff --git a/indra/llui/llxuiparser.h b/indra/llui/llxuiparser.h
new file mode 100644
index 0000000000..e48663e5cc
--- /dev/null
+++ b/indra/llui/llxuiparser.h
@@ -0,0 +1,244 @@
+/** 
+ * @file llxuiparser.h
+ * @brief Utility functions for handling XUI structures in XML
+ *
+ * $LicenseInfo:firstyear=2003&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LLXUIPARSER_H
+#define LLXUIPARSER_H
+
+#include "llinitparam.h"
+#include "llregistry.h"
+#include "llpointer.h"
+
+#include <boost/function.hpp>
+#include <iosfwd>
+#include <stack>
+#include <set>
+
+
+
+class LLView;
+
+
+typedef LLPointer<class LLXMLNode> LLXMLNodePtr;
+
+
+// lookup widget type by name
+class LLWidgetTypeRegistry
+:	public LLRegistrySingleton<std::string, const std::type_info*, LLWidgetTypeRegistry>
+{};
+
+
+// global static instance for registering all widget types
+typedef boost::function<LLView* (LLXMLNodePtr node, LLView *parent, LLXMLNodePtr output_node)> LLWidgetCreatorFunc;
+
+typedef LLRegistry<std::string, LLWidgetCreatorFunc> widget_registry_t;
+
+class LLChildRegistryRegistry
+: public LLRegistrySingleton<const std::type_info*, widget_registry_t, LLChildRegistryRegistry>
+{};
+
+
+
+class LLXSDWriter : public LLInitParam::Parser
+{
+	LOG_CLASS(LLXSDWriter);
+public:
+	void writeXSD(const std::string& name, LLXMLNodePtr node, const LLInitParam::BaseBlock& block, const std::string& xml_namespace);
+
+	/*virtual*/ std::string getCurrentElementName() { return LLStringUtil::null; }
+
+	LLXSDWriter();
+
+protected:
+	void writeAttribute(const std::string& type, const Parser::name_stack_t&, S32 min_count, S32 max_count, const std::vector<std::string>* possible_values);
+	void addAttributeToSchema(LLXMLNodePtr nodep, const std::string& attribute_name, const std::string& type, bool mandatory, const std::vector<std::string>* possible_values);
+	LLXMLNodePtr mAttributeNode;
+	LLXMLNodePtr mElementNode;
+	LLXMLNodePtr mSchemaNode;
+
+	typedef std::set<std::string> string_set_t;
+	typedef std::map<LLXMLNodePtr, string_set_t> attributes_map_t;
+	attributes_map_t	mAttributesWritten;
+};
+
+
+
+// NOTE: DOES NOT WORK YET
+// should support child widgets for XUI
+class LLXUIXSDWriter : public LLXSDWriter
+{
+public:
+	void writeXSD(const std::string& name, const std::string& path, const LLInitParam::BaseBlock& block);
+};
+
+
+class LLXUIParserImpl;
+
+class LLXUIParser : public LLInitParam::Parser
+{
+LOG_CLASS(LLXUIParser);
+
+public:
+	LLXUIParser();
+	typedef LLInitParam::Parser::name_stack_t name_stack_t;
+
+	/*virtual*/ std::string getCurrentElementName();
+	/*virtual*/ void parserWarning(const std::string& message);
+	/*virtual*/ void parserError(const std::string& message);
+
+	void readXUI(LLXMLNodePtr node, LLInitParam::BaseBlock& block, const std::string& filename = LLStringUtil::null, bool silent=false);
+	void writeXUI(LLXMLNodePtr node, const LLInitParam::BaseBlock& block, const LLInitParam::BaseBlock* diff_block = NULL);
+
+private:
+	bool readXUIImpl(LLXMLNodePtr node, LLInitParam::BaseBlock& block);
+	bool readAttributes(LLXMLNodePtr nodep, LLInitParam::BaseBlock& block);
+
+	//reader helper functions
+	static bool readFlag(Parser& parser, void* val_ptr);
+	static bool readBoolValue(Parser& parser, void* val_ptr);
+	static bool readStringValue(Parser& parser, void* val_ptr);
+	static bool readU8Value(Parser& parser, void* val_ptr);
+	static bool readS8Value(Parser& parser, void* val_ptr);
+	static bool readU16Value(Parser& parser, void* val_ptr);
+	static bool readS16Value(Parser& parser, void* val_ptr);
+	static bool readU32Value(Parser& parser, void* val_ptr);
+	static bool readS32Value(Parser& parser, void* val_ptr);
+	static bool readF32Value(Parser& parser, void* val_ptr);
+	static bool readF64Value(Parser& parser, void* val_ptr);
+	static bool readVector3Value(Parser& parser, void* val_ptr);
+	static bool readColor4Value(Parser& parser, void* val_ptr);
+	static bool readUIColorValue(Parser& parser, void* val_ptr);
+	static bool readUUIDValue(Parser& parser, void* val_ptr);
+	static bool readSDValue(Parser& parser, void* val_ptr);
+
+	//writer helper functions
+	static bool writeFlag(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeBoolValue(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeStringValue(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeU8Value(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeS8Value(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeU16Value(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeS16Value(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeU32Value(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeS32Value(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeF32Value(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeF64Value(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeVector3Value(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeColor4Value(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeUIColorValue(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeUUIDValue(Parser& parser, const void* val_ptr, name_stack_t&);
+	static bool writeSDValue(Parser& parser, const void* val_ptr, name_stack_t&);
+
+	LLXMLNodePtr getNode(name_stack_t& stack);
+
+private:
+	Parser::name_stack_t			mNameStack;
+	LLXMLNodePtr					mCurReadNode;
+	// Root of the widget XML sub-tree, for example, "line_editor"
+	LLXMLNodePtr					mWriteRootNode;
+	
+	typedef std::map<std::string, LLXMLNodePtr>	out_nodes_t;
+	out_nodes_t						mOutNodes;
+	LLXMLNodePtr					mLastWrittenChild;
+	S32								mCurReadDepth;
+	std::string						mCurFileName;
+	std::string						mRootNodeName;
+};
+
+// LLSimpleXUIParser is a streamlined SAX-based XUI parser that does not support localization 
+// or parsing of a tree of independent param blocks, such as child widgets.
+// Use this for reading non-localized files that only need a single param block as a result.
+//
+// NOTE: In order to support nested block parsing, we need callbacks for start element that
+// push new blocks contexts on the mScope stack.
+// NOTE: To support localization without building a DOM, we need to enforce consistent 
+// ordering of child elements from base file to localized diff file.  Then we can use a pair
+// of coroutines to perform matching of xml nodes during parsing.  Not sure if the overhead
+// of coroutines would offset the gain from SAX parsing
+class LLSimpleXUIParserImpl;
+
+class LLSimpleXUIParser : public LLInitParam::Parser
+{
+LOG_CLASS(LLSimpleXUIParser);
+public:
+	typedef LLInitParam::Parser::name_stack_t name_stack_t;
+	typedef LLInitParam::BaseBlock* (*element_start_callback_t)(LLSimpleXUIParser&, const char* block_name);
+
+	LLSimpleXUIParser(element_start_callback_t element_cb = NULL);
+	virtual ~LLSimpleXUIParser();
+
+	/*virtual*/ std::string getCurrentElementName();
+	/*virtual*/ void parserWarning(const std::string& message);
+	/*virtual*/ void parserError(const std::string& message);
+
+	bool readXUI(const std::string& filename, LLInitParam::BaseBlock& block, bool silent=false);
+
+
+private:
+	//reader helper functions
+	static bool readFlag(Parser&, void* val_ptr);
+	static bool readBoolValue(Parser&, void* val_ptr);
+	static bool readStringValue(Parser&, void* val_ptr);
+	static bool readU8Value(Parser&, void* val_ptr);
+	static bool readS8Value(Parser&, void* val_ptr);
+	static bool readU16Value(Parser&, void* val_ptr);
+	static bool readS16Value(Parser&, void* val_ptr);
+	static bool readU32Value(Parser&, void* val_ptr);
+	static bool readS32Value(Parser&, void* val_ptr);
+	static bool readF32Value(Parser&, void* val_ptr);
+	static bool readF64Value(Parser&, void* val_ptr);
+	static bool readColor4Value(Parser&, void* val_ptr);
+	static bool readUIColorValue(Parser&, void* val_ptr);
+	static bool readUUIDValue(Parser&, void* val_ptr);
+	static bool readSDValue(Parser&, void* val_ptr);
+
+private:
+	static void startElementHandler(void *userData, const char *name, const char **atts);
+	static void endElementHandler(void *userData, const char *name);
+	static void characterDataHandler(void *userData, const char *s, int len);
+
+	void startElement(const char *name, const char **atts);
+	void endElement(const char *name);
+	void characterData(const char *s, int len);
+	bool readAttributes(const char **atts);
+	bool processText();
+
+	Parser::name_stack_t			mNameStack;
+	struct XML_ParserStruct*		mParser;
+	LLXMLNodePtr					mLastWrittenChild;
+	S32								mCurReadDepth;
+	std::string						mCurFileName;
+	std::string						mTextContents;
+	const char*						mCurAttributeValueBegin;
+	std::vector<S32>				mTokenSizeStack;
+	std::vector<std::string>		mScope;
+	std::vector<bool>				mEmptyLeafNode;
+	element_start_callback_t		mElementCB;
+
+	std::vector<std::pair<LLInitParam::BaseBlock*, S32> > mOutputStack;
+};
+
+
+#endif //LLXUIPARSER_H
diff --git a/indra/llui/tests/llurlentry_stub.cpp b/indra/llui/tests/llurlentry_stub.cpp
index 61e30d89d0..ee87d01239 100644
--- a/indra/llui/tests/llurlentry_stub.cpp
+++ b/indra/llui/tests/llurlentry_stub.cpp
@@ -105,30 +105,6 @@ LLStyle::Params::Params()
 
 namespace LLInitParam
 {
-	Param::Param(BaseBlock* enclosing_block)
-	:	mIsProvided(false)
-	{
-		const U8* my_addr = reinterpret_cast<const U8*>(this);
-		const U8* block_addr = reinterpret_cast<const U8*>(enclosing_block);
-		U32 enclosing_block_offset = 0x7FFFffff & (U32)(my_addr - block_addr);
-		mEnclosingBlockOffsetLow = enclosing_block_offset & 0x0000ffff;
-		mEnclosingBlockOffsetHigh = (enclosing_block_offset & 0x007f0000) >> 16;
-	}
-
-	void BlockDescriptor::addParam(const ParamDescriptorPtr in_param, const char* char_name){}
-	void BaseBlock::addSynonym(Param& param, const std::string& synonym) {}
-	param_handle_t BaseBlock::getHandleFromParam(const Param* param) const {return 0;}
-	
-	void BaseBlock::init(BlockDescriptor& descriptor, BlockDescriptor& base_descriptor, size_t block_size)
-	{
-		descriptor.mCurrentBlockPtr = this;
-	}
-	bool BaseBlock::deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack, bool new_name){ return true; }
-	void BaseBlock::serializeBlock(Parser& parser, Parser::name_stack_t& name_stack, const LLInitParam::BaseBlock* diff_block) const {}
-	bool BaseBlock::inspectBlock(Parser& parser, Parser::name_stack_t name_stack, S32 min_value, S32 max_value) const { return true; }
-	bool BaseBlock::mergeBlock(BlockDescriptor& block_data, const BaseBlock& other, bool overwrite) { return true; }
-	bool BaseBlock::validateBlock(bool emit_errors) const { return true; }
-
 	ParamValue<LLUIColor>::ParamValue(const LLUIColor& color)
 	:	super_t(color)
 	{}
diff --git a/indra/llui/tests/llurlentry_test.cpp b/indra/llui/tests/llurlentry_test.cpp
index c1fb050206..8f0a48018f 100644
--- a/indra/llui/tests/llurlentry_test.cpp
+++ b/indra/llui/tests/llurlentry_test.cpp
@@ -70,21 +70,6 @@ S32 LLUIImage::getHeight() const
 	return 0;
 }
 
-namespace LLInitParam
-{
-	BlockDescriptor::BlockDescriptor() {}
-	ParamDescriptor::ParamDescriptor(param_handle_t p, 
-						merge_func_t merge_func, 
-						deserialize_func_t deserialize_func, 
-						serialize_func_t serialize_func,
-						validation_func_t validation_func,
-						inspect_func_t inspect_func,
-						S32 min_count,
-						S32 max_count){}
-	ParamDescriptor::~ParamDescriptor() {}
-
-}
-
 namespace tut
 {
 	struct LLUrlEntryData
diff --git a/indra/llui/tests/llurlmatch_test.cpp b/indra/llui/tests/llurlmatch_test.cpp
index 97fe5b2eea..109d3ca7bb 100644
--- a/indra/llui/tests/llurlmatch_test.cpp
+++ b/indra/llui/tests/llurlmatch_test.cpp
@@ -63,42 +63,6 @@ S32 LLUIImage::getHeight() const
 
 namespace LLInitParam
 {
-	BlockDescriptor::BlockDescriptor() {}
-	ParamDescriptor::ParamDescriptor(param_handle_t p, 
-						merge_func_t merge_func, 
-						deserialize_func_t deserialize_func, 
-						serialize_func_t serialize_func,
-						validation_func_t validation_func,
-						inspect_func_t inspect_func,
-						S32 min_count,
-						S32 max_count){}
-	ParamDescriptor::~ParamDescriptor() {}
-
-	void BlockDescriptor::addParam(const ParamDescriptorPtr in_param, const char* char_name){}
-	param_handle_t BaseBlock::getHandleFromParam(const Param* param) const {return 0;}
-	void BaseBlock::addSynonym(Param& param, const std::string& synonym) {}
-
-	void BaseBlock::init(BlockDescriptor& descriptor, BlockDescriptor& base_descriptor, size_t block_size)
-	{
-		descriptor.mCurrentBlockPtr = this;
-	}
-
-	Param::Param(BaseBlock* enclosing_block)
-	:	mIsProvided(false)
-	{
-		const U8* my_addr = reinterpret_cast<const U8*>(this);
-		const U8* block_addr = reinterpret_cast<const U8*>(enclosing_block);
-		U32 enclosing_block_offset = 0x7FFFffff & (U32)(my_addr - block_addr);
-		mEnclosingBlockOffsetLow = enclosing_block_offset & 0x0000ffff;
-		mEnclosingBlockOffsetHigh = (enclosing_block_offset & 0x007f0000) >> 16;
-	}
-
-	bool BaseBlock::deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack, bool new_name){ return true; }
-	void BaseBlock::serializeBlock(Parser& parser, Parser::name_stack_t& name_stack, const LLInitParam::BaseBlock* diff_block) const {}
-	bool BaseBlock::inspectBlock(Parser& parser, Parser::name_stack_t name_stack, S32 min_count, S32 max_count) const { return true; }
-	bool BaseBlock::mergeBlock(BlockDescriptor& block_data, const BaseBlock& other, bool overwrite) { return true; }
-	bool BaseBlock::validateBlock(bool emit_errors) const { return true; }
-
 	ParamValue<LLUIColor>::ParamValue(const LLUIColor& color)
 	:	super_t(color)
 	{}