18 files changed, 502 insertions, 52 deletions

diff --git a/indra/llui/CMakeLists.txt b/indra/llui/CMakeLists.txt
index 532b6b6524..3ecab90756 100644
--- a/indra/llui/CMakeLists.txt
+++ b/indra/llui/CMakeLists.txt
@@ -52,6 +52,7 @@ set(llui_SOURCE_FILES
     llkeywords.cpp
     lllayoutstack.cpp
     lllineeditor.cpp
+    llloadingindicator.cpp
     lllocalcliprect.cpp
     llmenubutton.cpp
     llmenugl.cpp
@@ -144,6 +145,7 @@ set(llui_HEADER_FILES
     lllayoutstack.h
     lllazyvalue.h
     lllineeditor.h
+    llloadingindicator.h
     lllocalcliprect.h
     llmenubutton.h
     llmenugl.h
diff --git a/indra/llui/llaccordionctrl.cpp b/indra/llui/llaccordionctrl.cpp
index 136fd2a9ac..5d1d57cbb2 100644
--- a/indra/llui/llaccordionctrl.cpp
+++ b/indra/llui/llaccordionctrl.cpp
@@ -329,7 +329,7 @@ void LLAccordionCtrl::addCollapsibleCtrl(LLView* view)
 	LLAccordionCtrlTab* accordion_tab = dynamic_cast<LLAccordionCtrlTab*>(view);
 	if(!accordion_tab)
 		return;
-	if(std::find(getChildList()->begin(),getChildList()->end(),accordion_tab) == getChildList()->end())
+	if(std::find(beginChild(), endChild(), accordion_tab) == endChild())
 		addChild(accordion_tab);
 	mAccordionTabs.push_back(accordion_tab);
 
@@ -343,7 +343,7 @@ void LLAccordionCtrl::removeCollapsibleCtrl(LLView* view)
 	if(!accordion_tab)
 		return;
 
-	if(std::find(getChildList()->begin(),getChildList()->end(),accordion_tab) != getChildList()->end())
+	if(std::find(beginChild(), endChild(), accordion_tab) != endChild())
 		removeChild(accordion_tab);
 
 	for (std::vector<LLAccordionCtrlTab*>::iterator iter = mAccordionTabs.begin();
@@ -668,15 +668,23 @@ S32	LLAccordionCtrl::notifyParent(const LLSD& info)
 				LLAccordionCtrlTab* accordion_tab = dynamic_cast<LLAccordionCtrlTab*>(mAccordionTabs[i]);
 				if(accordion_tab->hasFocus() && i>0)
 				{
+					bool prev_visible_tab_found = false;
 					while(i>0)
 					{
 						if(mAccordionTabs[--i]->getVisible())
+						{
+							prev_visible_tab_found = true;
 							break;
+						}
 					}
-					
-					accordion_tab = dynamic_cast<LLAccordionCtrlTab*>(mAccordionTabs[i]);
-					accordion_tab->notify(LLSD().with("action","select_last"));
-					return 1;
+
+					if (prev_visible_tab_found)
+					{
+						accordion_tab = dynamic_cast<LLAccordionCtrlTab*>(mAccordionTabs[i]);
+						accordion_tab->notify(LLSD().with("action","select_last"));
+						return 1;
+					}
+					break;
 				}
 			}
 			return 0;
diff --git a/indra/llui/llaccordionctrltab.cpp b/indra/llui/llaccordionctrltab.cpp
index d389236642..596da782ce 100644
--- a/indra/llui/llaccordionctrltab.cpp
+++ b/indra/llui/llaccordionctrltab.cpp
@@ -436,6 +436,34 @@ void LLAccordionCtrlTab::setAccordionView(LLView* panel)
 	addChild(panel,0);
 }
 
+void LLAccordionCtrlTab::setTitle(const std::string& title)
+{
+	LLAccordionCtrlTabHeader* header = findChild<LLAccordionCtrlTabHeader>(DD_HEADER_NAME);
+	if (header)
+	{
+		header->setTitle(title);
+	}
+}
+
+boost::signals2::connection LLAccordionCtrlTab::setFocusReceivedCallback(const focus_signal_t::slot_type& cb)
+{
+	LLAccordionCtrlTabHeader* header = findChild<LLAccordionCtrlTabHeader>(DD_HEADER_NAME);
+	if (header)
+	{
+		return header->setFocusReceivedCallback(cb);
+	}
+	return boost::signals2::connection();
+}
+
+boost::signals2::connection LLAccordionCtrlTab::setFocusLostCallback(const focus_signal_t::slot_type& cb)
+{
+	LLAccordionCtrlTabHeader* header = findChild<LLAccordionCtrlTabHeader>(DD_HEADER_NAME);
+	if (header)
+	{
+		return header->setFocusLostCallback(cb);
+	}
+	return boost::signals2::connection();
+}
 
 LLView*	LLAccordionCtrlTab::findContainerView()
 {
@@ -554,7 +582,8 @@ S32	LLAccordionCtrlTab::notifyParent(const LLSD& info)
 			}
 			
 			//LLAccordionCtrl should rearrange accodion tab if one of accordion change its size
-			getParent()->notifyParent(info);
+			if (getParent()) // A parent may not be set if tabs are added dynamically.
+				getParent()->notifyParent(info);
 			return 1;
 		}
 		else if(str_action == "select_prev") 
diff --git a/indra/llui/llaccordionctrltab.h b/indra/llui/llaccordionctrltab.h
index fb19d17e99..de254ed3eb 100644
--- a/indra/llui/llaccordionctrltab.h
+++ b/indra/llui/llaccordionctrltab.h
@@ -113,6 +113,12 @@ public:
 	void		setAccordionView(LLView* panel);
 	LLView*		getAccordionView() { return mContainerPanel; };
 
+	// Set text in LLAccordionCtrlTabHeader
+	void setTitle(const std::string& title);
+
+	boost::signals2::connection setFocusReceivedCallback(const focus_signal_t::slot_type& cb);
+	boost::signals2::connection setFocusLostCallback(const focus_signal_t::slot_type& cb);
+
 	bool getCollapsible() {return mCollapsible;};
 
 	void setCollapsible(bool collapsible) {mCollapsible = collapsible;};
diff --git a/indra/llui/llflatlistview.cpp b/indra/llui/llflatlistview.cpp
index 990bf5cd22..bea2572ff8 100644
--- a/indra/llui/llflatlistview.cpp
+++ b/indra/llui/llflatlistview.cpp
@@ -297,6 +297,27 @@ void LLFlatListView::setNoItemsCommentText(const std::string& comment_text)
 	mNoItemsCommentTextbox->setValue(comment_text);
 }
 
+U32 LLFlatListView::size(const bool only_visible_items) const
+{
+	if (only_visible_items)
+	{
+		U32 size = 0;
+		for (pairs_const_iterator_t
+				 iter = mItemPairs.begin(),
+				 iter_end = mItemPairs.end();
+			 iter != iter_end; ++iter)
+		{
+			if ((*iter)->first->getVisible())
+				++size;
+		}
+		return size;
+	}
+	else
+	{
+		return mItemPairs.size();
+	}
+}
+
 void LLFlatListView::clear()
 {
 	// do not use LLView::deleteAllChildren to avoid removing nonvisible items. drag-n-drop for ex.
@@ -426,7 +447,7 @@ void LLFlatListView::rearrangeItems()
 {
 	static LLUICachedControl<S32> scrollbar_size ("UIScrollbarSize", 0);
 
-	setNoItemsCommentVisible(mItemPairs.empty());
+	setNoItemsCommentVisible(0==size());
 
 	if (mItemPairs.empty()) return;
 
@@ -744,14 +765,44 @@ LLRect LLFlatListView::getLastSelectedItemRect()
 
 void LLFlatListView::selectFirstItem	()
 {
-	selectItemPair(mItemPairs.front(), true);
-	ensureSelectedVisible();
+	// No items - no actions!
+	if (0 == size()) return;
+
+	// Select first visible item
+	for (pairs_iterator_t
+			 iter = mItemPairs.begin(),
+			 iter_end = mItemPairs.end();
+		 iter != iter_end; ++iter)
+	{
+		// skip invisible items
+		if ( (*iter)->first->getVisible() )
+		{
+			selectItemPair(*iter, true);
+			ensureSelectedVisible();
+			break;
+		}
+	}
 }
 
 void LLFlatListView::selectLastItem		()
 {
-	selectItemPair(mItemPairs.back(), true);
-	ensureSelectedVisible();
+	// No items - no actions!
+	if (0 == size()) return;
+
+	// Select last visible item
+	for (pairs_list_t::reverse_iterator
+			 r_iter = mItemPairs.rbegin(),
+			 r_iter_end = mItemPairs.rend();
+		 r_iter != r_iter_end; ++r_iter)
+	{
+		// skip invisible items
+		if ( (*r_iter)->first->getVisible() )
+		{
+			selectItemPair(*r_iter, true);
+			ensureSelectedVisible();
+			break;
+		}
+	}
 }
 
 void LLFlatListView::ensureSelectedVisible()
@@ -769,14 +820,14 @@ void LLFlatListView::ensureSelectedVisible()
 bool LLFlatListView::selectNextItemPair(bool is_up_direction, bool reset_selection)
 {
 	// No items - no actions!
-	if ( !mItemPairs.size() )
+	if ( 0 == size() )
 		return false;
 
-	
-	item_pair_t* to_sel_pair = NULL;
-	item_pair_t* cur_sel_pair = NULL;
 	if ( mSelectedItemPairs.size() )
 	{
+		item_pair_t* to_sel_pair = NULL;
+		item_pair_t* cur_sel_pair = NULL;
+
 		// Take the last selected pair
 		cur_sel_pair = mSelectedItemPairs.back();
 		// Bases on given direction choose next item to select
@@ -810,42 +861,42 @@ bool LLFlatListView::selectNextItemPair(bool is_up_direction, bool reset_selecti
 				}
 			}
 		}
+
+		if ( to_sel_pair )
+		{
+			bool select = true;
+			if ( reset_selection )
+			{
+				// Reset current selection if we were asked about it
+				resetSelection();
+			}
+			else
+			{
+				// If item already selected and no reset request than we should deselect last selected item.
+				select = (mSelectedItemPairs.end() == std::find(mSelectedItemPairs.begin(), mSelectedItemPairs.end(), to_sel_pair));
+			}
+			// Select/Deselect next item
+			selectItemPair(select ? to_sel_pair : cur_sel_pair, select);
+			return true;
+		}
 	}
 	else
 	{
 		// If there weren't selected items then choose the first one bases on given direction
-		cur_sel_pair = (is_up_direction) ? mItemPairs.back() : mItemPairs.front();
 		// Force selection to first item
-		to_sel_pair = cur_sel_pair;
-	}
-
-
-	if ( to_sel_pair )
-	{
-		bool select = true;
-
-		if ( reset_selection )
-		{
-			// Reset current selection if we were asked about it
-			resetSelection();
-		}
+		if (is_up_direction)
+			selectLastItem();
 		else
-		{
-			// If item already selected and no reset request than we should deselect last selected item.
-			select = (mSelectedItemPairs.end() == std::find(mSelectedItemPairs.begin(), mSelectedItemPairs.end(), to_sel_pair));
-		}
-
-		// Select/Deselect next item
-		selectItemPair(select ? to_sel_pair : cur_sel_pair, select);
-
+			selectFirstItem();
 		return true;
 	}
+
 	return false;
 }
 
 BOOL LLFlatListView::canSelectAll() const
 {
-	return !mItemPairs.empty() && mAllowSelection && mMultipleSelection;
+	return 0 != size() && mAllowSelection && mMultipleSelection;
 }
 
 void LLFlatListView::selectAll()
@@ -1141,12 +1192,17 @@ LLFlatListViewEx::LLFlatListViewEx(const Params& p)
 
 }
 
-void LLFlatListViewEx::updateNoItemsMessage(bool items_filtered)
+void LLFlatListViewEx::updateNoItemsMessage(const std::string& filter_string)
 {
+	bool items_filtered = !filter_string.empty();
 	if (items_filtered)
 	{
 		// items were filtered
-		setNoItemsCommentText(mNoFilteredItemsMsg);
+		LLStringUtil::format_map_t args;
+		args["[SEARCH_TERM]"] = LLURI::escape(filter_string);
+		std::string text = mNoFilteredItemsMsg;
+		LLStringUtil::format(text, args);
+		setNoItemsCommentText(text);
 	}
 	else
 	{
@@ -1156,4 +1212,51 @@ void LLFlatListViewEx::updateNoItemsMessage(bool items_filtered)
 
 }
 
+void LLFlatListViewEx::setFilterSubString(const std::string& filter_str)
+{
+	if (0 != LLStringUtil::compareInsensitive(filter_str, mFilterSubString))
+	{
+		mFilterSubString = filter_str;
+		updateNoItemsMessage(mFilterSubString);
+		filterItems();
+	}
+}
+
+void LLFlatListViewEx::filterItems()
+{
+	typedef std::vector <LLPanel*> item_panel_list_t;
+
+	std::string cur_filter = mFilterSubString;
+	LLStringUtil::toUpper(cur_filter);
+
+	LLSD action;
+	action.with("match_filter", cur_filter);
+
+	item_panel_list_t items;
+	getItems(items);
+
+	for (item_panel_list_t::iterator
+			 iter = items.begin(),
+			 iter_end = items.end();
+		 iter != iter_end; ++iter)
+	{
+		LLPanel* pItem = (*iter);
+		// 0 signifies that filter is matched,
+		// i.e. we don't hide items that don't support 'match_filter' action, separators etc.
+		if (0 == pItem->notify(action))
+		{
+			pItem->setVisible(true);
+		}
+		else
+		{
+			// TODO: implement (re)storing of current selection.
+			selectItem(pItem, false);
+			pItem->setVisible(false);
+		}
+	}
+
+	rearrangeItems();
+	notifyParentItemsRectChanged();
+}
+
 //EOF
diff --git a/indra/llui/llflatlistview.h b/indra/llui/llflatlistview.h
index f7d094f7e7..6395805aab 100644
--- a/indra/llui/llflatlistview.h
+++ b/indra/llui/llflatlistview.h
@@ -264,9 +264,8 @@ public:
 	/** Get number of selected items in the list */
 	U32 numSelected() const {return mSelectedItemPairs.size(); }
 
-	/** Get number of items in the list */
-	U32 size() const { return mItemPairs.size(); }
-
+	/** Get number of (visible) items in the list */
+	U32 size(const bool only_visible_items = true) const;
 
 	/** Removes all items from the list */
 	virtual void clear();
@@ -464,20 +463,32 @@ public:
 	void setNoItemsMsg(const std::string& msg) { mNoItemsMsg = msg; }
 	void setNoFilteredItemsMsg(const std::string& msg) { mNoFilteredItemsMsg = msg; }
 
+	/**
+	 * Sets up new filter string and filters the list.
+	 */
+	void setFilterSubString(const std::string& filter_str);
+	
+	/**
+	 * Filters the list, rearranges and notifies parent about shape changes.
+	 * Derived classes may want to overload rearrangeItems() to exclude repeated separators after filtration.
+	 */
+	void filterItems();
+
 protected:
 	LLFlatListViewEx(const Params& p);
 
 	/**
 	 * Applies a message for empty list depend on passed argument.
 	 *
-	 * @param items_filtered - if true message for filtered items will be set, otherwise for
-	 * completely empty list.
+	 * @param filter_string - if is not empty, message for filtered items will be set, otherwise for
+	 * completely empty list. Value of filter string will be passed as search_term in SLURL.
 	 */
-	void updateNoItemsMessage(bool items_filtered);
+	void updateNoItemsMessage(const std::string& filter_string);
 
 private:
 	std::string mNoFilteredItemsMsg;
 	std::string mNoItemsMsg;
+	std::string	mFilterSubString;
 };
 
 #endif
diff --git a/indra/llui/llfloater.h b/indra/llui/llfloater.h
index 403723d9d8..444711de81 100644
--- a/indra/llui/llfloater.h
+++ b/indra/llui/llfloater.h
@@ -432,11 +432,15 @@ private:
 
 class LLFloaterView : public LLUICtrl
 {
+public:
+	struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>{};
+
 protected:
 	LLFloaterView (const Params& p);
 	friend class LLUICtrlFactory;
 
 public:
+
 	/*virtual*/ void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
 	void reshapeFloater(S32 width, S32 height, BOOL called_from_parent, BOOL adjust_vertical);
 
diff --git a/indra/llui/lllineeditor.cpp b/indra/llui/lllineeditor.cpp
index 843f72d8e4..45f9de8e8d 100644
--- a/indra/llui/lllineeditor.cpp
+++ b/indra/llui/lllineeditor.cpp
@@ -1440,7 +1440,7 @@ BOOL LLLineEditor::handleUnicodeCharHere(llwchar uni_char)
 
 BOOL LLLineEditor::canDoDelete() const
 {
-	return ( !mReadOnly && (!mPassDelete || (hasSelection() || (getCursor() < mText.length()))) );
+	return ( !mReadOnly && mText.length() > 0 && (!mPassDelete || (hasSelection() || (getCursor() < mText.length()))) );
 }
 
 void LLLineEditor::doDelete()
diff --git a/indra/llui/llloadingindicator.cpp b/indra/llui/llloadingindicator.cpp
new file mode 100644
index 0000000000..f8b029e19c
--- /dev/null
+++ b/indra/llui/llloadingindicator.cpp
@@ -0,0 +1,133 @@
+/** 
+ * @file llloadingindicator.cpp
+ * @brief Perpetual loading indicator
+ *
+ * $LicenseInfo:firstyear=2010&license=viewergpl$
+ * 
+ * Copyright (c) 2010, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llloadingindicator.h"
+
+// Linden library includes
+#include "llsingleton.h"
+
+// Project includes
+#include "lluictrlfactory.h"
+#include "lluiimage.h"
+
+static LLDefaultChildRegistry::Register<LLLoadingIndicator> r("loading_indicator");
+
+///////////////////////////////////////////////////////////////////////////////
+// LLLoadingIndicator::Data class
+///////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Pre-loaded images shared by all instances of the widget
+ */
+class LLLoadingIndicator::Data: public LLSingleton<LLLoadingIndicator::Data>
+{
+public:
+	/*virtual*/ void		initSingleton(); // from LLSingleton
+
+	LLPointer<LLUIImage>	getNextImage(S8& idx) const;
+	U8						getImagesCount() const	{ return NIMAGES; }
+private:
+
+	static const U8			NIMAGES = 12;
+	LLPointer<LLUIImage>	mImages[NIMAGES];
+};
+
+// virtual
+// Called right after the instance gets constructed.
+void LLLoadingIndicator::Data::initSingleton()
+{
+	// Load images.
+	for (U8 i = 0; i < NIMAGES; ++i)
+	{
+		std::string img_name = llformat("Progress_%d", i+1);
+		mImages[i] = LLUI::getUIImage(img_name, 0);
+		llassert(mImages[i]);
+	}
+}
+
+LLPointer<LLUIImage> LLLoadingIndicator::Data::getNextImage(S8& idx) const
+{
+	// Calculate next index, performing array bounds checking.
+	idx = (idx >= NIMAGES || idx < 0) ? 0 : (idx + 1) % NIMAGES; 
+	return mImages[idx];
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// LLLoadingIndicator class
+///////////////////////////////////////////////////////////////////////////////
+
+LLLoadingIndicator::LLLoadingIndicator(const Params& p)
+:	LLUICtrl(p)
+	, mRotationsPerSec(p.rotations_per_sec > 0 ? p.rotations_per_sec : 1.0f)
+	, mCurImageIdx(-1)
+{
+	// Select initial image.
+	mCurImagep = Data::instance().getNextImage(mCurImageIdx);
+
+	// Start timer for switching images.
+	start();
+}
+
+void LLLoadingIndicator::draw()
+{
+	// Time to switch to the next image?
+	if (mImageSwitchTimer.getStarted() && mImageSwitchTimer.hasExpired())
+	{
+		// Switch to the next image.
+		mCurImagep = Data::instance().getNextImage(mCurImageIdx);
+
+		// Restart timer.
+		start();
+	}
+
+	// Draw current image.
+	if( mCurImagep.notNull() )
+	{
+		mCurImagep->draw(getLocalRect(), LLColor4::white % getDrawContext().mAlpha);
+	}
+
+	LLUICtrl::draw();
+}
+
+void LLLoadingIndicator::stop()
+{
+	mImageSwitchTimer.stop();
+}
+
+void LLLoadingIndicator::start()
+{
+	mImageSwitchTimer.start();
+	F32 period = 1.0f / (Data::instance().getImagesCount() * mRotationsPerSec);
+	mImageSwitchTimer.setTimerExpirySec(period);
+}
diff --git a/indra/llui/llloadingindicator.h b/indra/llui/llloadingindicator.h
new file mode 100644
index 0000000000..32dd1fead8
--- /dev/null
+++ b/indra/llui/llloadingindicator.h
@@ -0,0 +1,93 @@
+/** 
+ * @file llloadingindicator.h
+ * @brief Perpetual loading indicator
+ *
+ * $LicenseInfo:firstyear=2010&license=viewergpl$
+ * 
+ * Copyright (c) 2010, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLLOADINGINDICATOR_H
+#define LL_LLLOADINGINDICATOR_H
+
+#include "lluictrl.h"
+
+///////////////////////////////////////////////////////////////////////////////
+// class LLLoadingIndicator
+///////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Perpetual loading indicator (a la MacOSX or YouTube)
+ * 
+ * Number of rotations per second can be overriden
+ * with the "roations_per_sec" parameter.
+ * 
+ * Can start/stop spinning.
+ * 
+ * @see start()
+ * @see stop()
+ */
+class LLLoadingIndicator
+: public LLUICtrl
+{
+	LOG_CLASS(LLLoadingIndicator);
+public:
+	struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
+	{
+		Optional<F32>	rotations_per_sec;
+		Params()
+		:	rotations_per_sec("rotations_per_sec", 1.0f)
+		{}
+	};
+
+	virtual ~LLLoadingIndicator() {}
+
+	// llview overrides
+	virtual void draw();
+
+	/**
+	 * Stop spinning.
+	 */
+	void stop();
+
+	/**
+	 * Start spinning.
+	 */
+	void start();
+
+private:
+	LLLoadingIndicator(const Params&);
+	friend class LLUICtrlFactory;
+
+	class Data;
+
+	F32						mRotationsPerSec;
+	S8						mCurImageIdx;
+	LLPointer<LLUIImage>	mCurImagep;
+	LLFrameTimer			mImageSwitchTimer;
+};
+
+#endif // LL_LLLOADINGINDICATOR_H
diff --git a/indra/llui/llspinctrl.cpp b/indra/llui/llspinctrl.cpp
index 491cd7b6f3..b47f21ed8a 100644
--- a/indra/llui/llspinctrl.cpp
+++ b/indra/llui/llspinctrl.cpp
@@ -457,3 +457,8 @@ BOOL LLSpinCtrl::handleKeyHere(KEY key, MASK mask)
 	return FALSE;
 }
 
+BOOL LLSpinCtrl::handleDoubleClick(S32 x, S32 y, MASK mask)
+{
+	// just treat a double click as a second click
+	return handleMouseDown(x, y, mask);
+}
diff --git a/indra/llui/llspinctrl.h b/indra/llui/llspinctrl.h
index 00d6f86f83..06201255d2 100644
--- a/indra/llui/llspinctrl.h
+++ b/indra/llui/llspinctrl.h
@@ -94,6 +94,7 @@ public:
 
 	virtual BOOL	handleScrollWheel(S32 x,S32 y,S32 clicks);
 	virtual BOOL	handleKeyHere(KEY key, MASK mask);
+	virtual BOOL	handleDoubleClick(S32 x, S32 y, MASK mask);
 
 	void			onEditorCommit(const LLSD& data);
 	static void		onEditorGainFocus(LLFocusableElement* caller, void *userdata);
diff --git a/indra/llui/llui.cpp b/indra/llui/llui.cpp
index f9a4ed7285..bf12384a28 100644
--- a/indra/llui/llui.cpp
+++ b/indra/llui/llui.cpp
@@ -56,6 +56,7 @@
 #include "llfloaterreg.h"
 #include "llmenugl.h"
 #include "llmenubutton.h"
+#include "llloadingindicator.h"
 #include "llwindow.h"
 
 // for registration
@@ -94,7 +95,10 @@ std::list<std::string> gUntranslated;
 static LLDefaultChildRegistry::Register<LLFilterEditor> register_filter_editor("filter_editor");
 static LLDefaultChildRegistry::Register<LLFlyoutButton> register_flyout_button("flyout_button");
 static LLDefaultChildRegistry::Register<LLSearchEditor> register_search_editor("search_editor");
+
+// register other widgets which otherwise may not be linked in
 static LLDefaultChildRegistry::Register<LLMenuButton> register_menu_button("menu_button");
+static LLDefaultChildRegistry::Register<LLLoadingIndicator> register_loading_indicator("loading_indicator");
 
 
 //
diff --git a/indra/llui/lluictrlfactory.cpp b/indra/llui/lluictrlfactory.cpp
index 27237800d4..930dadc377 100644
--- a/indra/llui/lluictrlfactory.cpp
+++ b/indra/llui/lluictrlfactory.cpp
@@ -435,7 +435,10 @@ void LLUICtrlFactory::registerWidget(const std::type_info* widget_type, const st
 	std::string* existing_tag = LLWidgetNameRegistry::instance().getValue(param_block_type);
 	if (existing_tag != NULL && *existing_tag != tag)
 	{
-		llerrs << "Duplicate entry for T::Params, try creating empty param block in derived classes that inherit T::Params" << llendl;
+		std::cerr << "Duplicate entry for T::Params, try creating empty param block in derived classes that inherit T::Params" << std::endl;
+		// forcing crash here
+		char* foo = 0;
+		*foo = 1;
 	}
 	LLWidgetNameRegistry ::instance().defaultRegistrar().add(param_block_type, tag);
 	// associate widget type with factory function
diff --git a/indra/llui/lluifwd.h b/indra/llui/lluifwd.h
index f99bb39fdd..d6047b943c 100644
--- a/indra/llui/lluifwd.h
+++ b/indra/llui/lluifwd.h
@@ -39,6 +39,7 @@ class LLComboBox;
 class LLDragHandle;
 class LLFloater;
 class LLIconCtrl;
+class LLLoadingIndicator;
 class LLLineEditor;
 class LLMenuGL;
 class LLPanel;
diff --git a/indra/llui/llurlentry.cpp b/indra/llui/llurlentry.cpp
index 20d3e679e6..fd56a87345 100644
--- a/indra/llui/llurlentry.cpp
+++ b/indra/llui/llurlentry.cpp
@@ -778,3 +778,35 @@ std::string LLUrlEntryNoLink::getLabel(const std::string &url, const LLUrlLabelC
 {
 	return getUrl(url);
 }
+
+//
+// LLUrlEntryIcon describes an icon with <icon>...</icon> tags
+//
+LLUrlEntryIcon::LLUrlEntryIcon()
+{
+	mPattern = boost::regex("<icon\\s*>\\s*([^<]*)?\\s*</icon\\s*>",
+							boost::regex::perl|boost::regex::icase);
+	mDisabledLink = true;
+}
+
+std::string LLUrlEntryIcon::getUrl(const std::string &url) const
+{
+	return LLStringUtil::null;
+}
+
+std::string LLUrlEntryIcon::getLabel(const std::string &url, const LLUrlLabelCallback &cb)
+{
+	return LLStringUtil::null;
+}
+
+std::string LLUrlEntryIcon::getIcon(const std::string &url)
+{
+	// Grep icon info between <icon>...</icon> tags
+	// matches[1] contains the icon name/path
+	boost::match_results<std::string::const_iterator> matches;
+	mIcon = (boost::regex_match(url, matches, mPattern) && matches[1].matched)
+		? matches[1]
+		: LLStringUtil::null;
+	LLStringUtil::trim(mIcon);
+	return mIcon;
+}
diff --git a/indra/llui/llurlentry.h b/indra/llui/llurlentry.h
index 29575d752c..71f030677a 100644
--- a/indra/llui/llurlentry.h
+++ b/indra/llui/llurlentry.h
@@ -77,7 +77,7 @@ public:
 	virtual std::string getLabel(const std::string &url, const LLUrlLabelCallback &cb) { return url; }
 
 	/// Return an icon that can be displayed next to Urls of this type
-	std::string getIcon() const { return mIcon; }
+	virtual std::string getIcon(const std::string &url) { return mIcon; }
 
 	/// Return the color to render the displayed text
 	LLUIColor getColor() const { return mColor; }
@@ -296,4 +296,17 @@ public:
 	/*virtual*/ std::string getUrl(const std::string &string) const;
 };
 
+///
+/// LLUrlEntryIcon describes an icon with <icon>...</icon> tags
+///
+class LLUrlEntryIcon : public LLUrlEntryBase
+{
+public:
+	LLUrlEntryIcon();
+	/*virtual*/ std::string getUrl(const std::string &string) const;
+	/*virtual*/ std::string getLabel(const std::string &url, const LLUrlLabelCallback &cb);
+	/*virtual*/ std::string getIcon(const std::string &url);
+};
+
+
 #endif
diff --git a/indra/llui/llurlregistry.cpp b/indra/llui/llurlregistry.cpp
index 0a70aa586a..4341286eb4 100644
--- a/indra/llui/llurlregistry.cpp
+++ b/indra/llui/llurlregistry.cpp
@@ -45,6 +45,7 @@ LLUrlRegistry::LLUrlRegistry()
 {
 	// Urls are matched in the order that they were registered
 	registerUrl(new LLUrlEntryNoLink());
+	registerUrl(new LLUrlEntryIcon());
 	registerUrl(new LLUrlEntrySLURL());
 	registerUrl(new LLUrlEntryHTTP());
 	registerUrl(new LLUrlEntryHTTPLabel());
@@ -135,7 +136,8 @@ static bool stringHasUrl(const std::string &text)
 			text.find(".net") != std::string::npos ||
 			text.find(".edu") != std::string::npos ||
 			text.find(".org") != std::string::npos ||
-			text.find("<nolink>") != std::string::npos);
+			text.find("<nolink>") != std::string::npos ||
+			text.find("<icon") != std::string::npos);
 }
 
 bool LLUrlRegistry::findUrl(const std::string &text, LLUrlMatch &match, const LLUrlLabelCallback &cb)
@@ -177,7 +179,7 @@ bool LLUrlRegistry::findUrl(const std::string &text, LLUrlMatch &match, const LL
 						match_entry->getUrl(url),
 						match_entry->getLabel(url, cb),
 						match_entry->getTooltip(url),
-						match_entry->getIcon(),
+						match_entry->getIcon(url),
 						match_entry->getColor(),
 						match_entry->getMenuName(),
 						match_entry->getLocation(url),