CHUI-337 FIXED: To avoid confusion with a classes "...conversation..." and in accordance with the naming convention in the project, some classes and corresponding files should be renamed:

LLIMConversation -> LLFloaterIMSessionTab
LLIMFloater -> LLFloaterIMSession
LLNearbyChat -> LLFloaterIMNearbyChat
LLIMFloaterContainer -> LLFloaterIMContainer
LLNearbyChatBarListener -> LLFloaterIMNearbyChatListener
LLNearbyChatHandler -> LLFloaterIMNearbyChatHandler

1 files changed, 1557 insertions, 0 deletions

diff --git a/indra/newview/llfloaterimcontainer.cpp b/indra/newview/llfloaterimcontainer.cpp
new file mode 100644
index 0000000000..b20d19d0fd
--- /dev/null
+++ b/indra/newview/llfloaterimcontainer.cpp
@@ -0,0 +1,1557 @@
+/** 
+ * @file llfloaterimcontainer.cpp
+ * @brief Multifloater containing active IM sessions in separate tab container tabs
+ *
+ * $LicenseInfo:firstyear=2009&license=viewerlgpl$
+ * 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 "llviewerprecompiledheaders.h"
+
+#include "llfloaterimsession.h"
+#include "llfloaterimcontainer.h"
+
+#include "llfloaterreg.h"
+#include "lllayoutstack.h"
+#include "llfloaterimnearbychat.h"
+
+#include "llagent.h"
+#include "llavataractions.h"
+#include "llavatariconctrl.h"
+#include "llavatarnamecache.h"
+#include "llcallbacklist.h"
+#include "llgroupactions.h"
+#include "llgroupiconctrl.h"
+#include "llfloateravatarpicker.h"
+#include "llfloaterpreference.h"
+#include "llimview.h"
+#include "llnotificationsutil.h"
+#include "lltransientfloatermgr.h"
+#include "llviewercontrol.h"
+#include "llconversationview.h"
+#include "llcallbacklist.h"
+#include "llworld.h"
+
+#include "llsdserialize.h"
+//
+// LLFloaterIMContainer
+//
+LLFloaterIMContainer::LLFloaterIMContainer(const LLSD& seed)
+:	LLMultiFloater(seed),
+	mExpandCollapseBtn(NULL),
+	mConversationsRoot(NULL),
+	mConversationsEventStream("ConversationsEvents"),
+	mInitialized(false)
+{
+    mEnableCallbackRegistrar.add("IMFloaterContainer.Check", boost::bind(&LLFloaterIMContainer::isActionChecked, this, _2));
+	mCommitCallbackRegistrar.add("IMFloaterContainer.Action", boost::bind(&LLFloaterIMContainer::onCustomAction,  this, _2));
+	
+    mEnableCallbackRegistrar.add("Avatar.CheckItem",  boost::bind(&LLFloaterIMContainer::checkContextMenuItem,	this, _2));
+    mEnableCallbackRegistrar.add("Avatar.EnableItem", boost::bind(&LLFloaterIMContainer::enableContextMenuItem,	this, _2));
+    mCommitCallbackRegistrar.add("Avatar.DoToSelected", boost::bind(&LLFloaterIMContainer::doToSelected, this, _2));
+    
+    mCommitCallbackRegistrar.add("Group.DoToSelected", boost::bind(&LLFloaterIMContainer::doToSelectedGroup, this, _2));
+
+	// Firstly add our self to IMSession observers, so we catch session events
+    LLIMMgr::getInstance()->addSessionObserver(this);
+
+	mAutoResize = FALSE;
+	LLTransientFloaterMgr::getInstance()->addControlView(LLTransientFloaterMgr::IM, this);
+}
+
+LLFloaterIMContainer::~LLFloaterIMContainer()
+{
+	mConversationsEventStream.stopListening("ConversationsRefresh");
+
+	gIdleCallbacks.deleteFunction(idle, this);
+
+	mNewMessageConnection.disconnect();
+	LLTransientFloaterMgr::getInstance()->removeControlView(LLTransientFloaterMgr::IM, this);
+
+	gSavedPerAccountSettings.setBOOL("ConversationsListPaneCollapsed", mConversationsPane->isCollapsed());
+	gSavedPerAccountSettings.setBOOL("ConversationsMessagePaneCollapsed", mMessagesPane->isCollapsed());
+
+	if (!LLSingleton<LLIMMgr>::destroyed())
+	{
+		LLIMMgr::getInstance()->removeSessionObserver(this);
+	}
+}
+
+void LLFloaterIMContainer::sessionAdded(const LLUUID& session_id, const std::string& name, const LLUUID& other_participant_id)
+{
+	addConversationListItem(session_id);
+	LLFloaterIMSessionTab::addToHost(session_id);
+}
+
+void LLFloaterIMContainer::sessionActivated(const LLUUID& session_id, const std::string& name, const LLUUID& other_participant_id)
+{
+    selectConversation(session_id);
+}
+
+void LLFloaterIMContainer::sessionVoiceOrIMStarted(const LLUUID& session_id)
+{
+	addConversationListItem(session_id);
+	LLFloaterIMSessionTab::addToHost(session_id);
+}
+
+void LLFloaterIMContainer::sessionIDUpdated(const LLUUID& old_session_id, const LLUUID& new_session_id)
+{
+	// *TODO: We should do this *without* delete and recreate
+	addConversationListItem(new_session_id, removeConversationListItem(old_session_id));
+}
+
+void LLFloaterIMContainer::sessionRemoved(const LLUUID& session_id)
+{
+	removeConversationListItem(session_id);
+}
+
+// static
+void LLFloaterIMContainer::onCurrentChannelChanged(const LLUUID& session_id)
+{
+    if (session_id != LLUUID::null)
+    {
+    	LLFloaterIMContainer::getInstance()->showConversation(session_id);
+    }
+}
+
+
+BOOL LLFloaterIMContainer::postBuild()
+{
+	mNewMessageConnection = LLIMModel::instance().mNewMsgSignal.connect(boost::bind(&LLFloaterIMContainer::onNewMessageReceived, this, _1));
+	// Do not call base postBuild to not connect to mCloseSignal to not close all floaters via Close button
+	// mTabContainer will be initialized in LLMultiFloater::addChild()
+	
+	setTabContainer(getChild<LLTabContainer>("im_box_tab_container"));
+
+	mConversationsStack = getChild<LLLayoutStack>("conversations_stack");
+	mConversationsPane = getChild<LLLayoutPanel>("conversations_layout_panel");
+	mMessagesPane = getChild<LLLayoutPanel>("messages_layout_panel");
+	
+	mConversationsListPanel = getChild<LLPanel>("conversations_list_panel");
+
+	// Open IM session with selected participant on double click event
+	mConversationsListPanel->setDoubleClickCallback(boost::bind(&LLFloaterIMContainer::doToSelected, this, LLSD("im")));
+
+	// Create the root model and view for all conversation sessions
+	LLConversationItem* base_item = new LLConversationItem(getRootViewModel());
+
+    LLFolderView::Params p(LLUICtrlFactory::getDefaultParams<LLFolderView>());
+    p.name = getName();
+    p.title = getLabel();
+    p.rect = LLRect(0, 0, getRect().getWidth(), 0);
+    p.parent_panel = mConversationsListPanel;
+    p.tool_tip = p.name;
+    p.listener = base_item;
+    p.view_model = &mConversationViewModel;
+    p.root = NULL;
+    p.use_ellipses = true;
+    p.options_menu = "menu_conversation.xml";
+	mConversationsRoot = LLUICtrlFactory::create<LLFolderView>(p);
+    mConversationsRoot->setCallbackRegistrar(&mCommitCallbackRegistrar);
+
+	// Add listener to conversation model events
+	mConversationsEventStream.listen("ConversationsRefresh", boost::bind(&LLFloaterIMContainer::onConversationModelEvent, this, _1));
+
+	// a scroller for folder view
+	LLRect scroller_view_rect = mConversationsListPanel->getRect();
+	scroller_view_rect.translate(-scroller_view_rect.mLeft, -scroller_view_rect.mBottom);
+	LLScrollContainer::Params scroller_params(LLUICtrlFactory::getDefaultParams<LLFolderViewScrollContainer>());
+	scroller_params.rect(scroller_view_rect);
+
+	LLScrollContainer* scroller = LLUICtrlFactory::create<LLFolderViewScrollContainer>(scroller_params);
+	scroller->setFollowsAll();
+	mConversationsListPanel->addChild(scroller);
+	scroller->addChild(mConversationsRoot);
+	mConversationsRoot->setScrollContainer(scroller);
+	mConversationsRoot->setFollowsAll();
+	mConversationsRoot->addChild(mConversationsRoot->mStatusTextBox);
+
+	addConversationListItem(LLUUID()); // manually add nearby chat
+
+	mExpandCollapseBtn = getChild<LLButton>("expand_collapse_btn");
+	mExpandCollapseBtn->setClickedCallback(boost::bind(&LLFloaterIMContainer::onExpandCollapseButtonClicked, this));
+
+	childSetAction("add_btn", boost::bind(&LLFloaterIMContainer::onAddButtonClicked, this));
+
+	collapseMessagesPane(gSavedPerAccountSettings.getBOOL("ConversationsMessagePaneCollapsed"));
+	collapseConversationsPane(gSavedPerAccountSettings.getBOOL("ConversationsListPaneCollapsed"));
+	LLAvatarNameCache::addUseDisplayNamesCallback(boost::bind(&LLFloaterIMSessionTab::processChatHistoryStyleUpdate));
+
+	if (! mMessagesPane->isCollapsed())
+	{
+		S32 list_width = gSavedPerAccountSettings.getS32("ConversationsListPaneWidth");
+		LLRect list_size = mConversationsPane->getRect();
+        S32 left_pad = mConversationsListPanel->getRect().mLeft;
+		list_size.mRight = list_size.mLeft + list_width - left_pad;
+
+        mConversationsPane->handleReshape(list_size, TRUE);
+	}
+
+	// Init the sort order now that the root had been created
+	setSortOrder(LLConversationSort(gSavedSettings.getU32("ConversationSortOrder")));
+	
+	mInitialized = true;
+
+	// Add callbacks:
+	// We'll take care of view updates on idle
+	gIdleCallbacks.addFunction(idle, this);
+	// When display name option change, we need to reload all participant names
+	LLAvatarNameCache::addUseDisplayNamesCallback(boost::bind(&LLFloaterIMContainer::processParticipantsStyleUpdate, this));
+
+	return TRUE;
+}
+
+void LLFloaterIMContainer::onOpen(const LLSD& key)
+{
+	LLMultiFloater::onOpen(key);
+	openNearbyChat();
+}
+
+// virtual
+void LLFloaterIMContainer::addFloater(LLFloater* floaterp,
+									  BOOL select_added_floater,
+									  LLTabContainer::eInsertionPoint insertion_point)
+{
+	if(!floaterp) return;
+
+	// already here
+	if (floaterp->getHost() == this)
+	{
+		openFloater(floaterp->getKey());
+		return;
+	}
+	
+	// Make sure the message panel is open when adding a floater or it stays mysteriously hidden
+	collapseMessagesPane(false);
+
+	// Add the floater
+	LLMultiFloater::addFloater(floaterp, select_added_floater, insertion_point);
+
+	LLUUID session_id = floaterp->getKey();
+	
+	LLIconCtrl* icon = 0;
+
+	if(gAgent.isInGroup(session_id, TRUE))
+	{
+		LLGroupIconCtrl::Params icon_params;
+		icon_params.group_id = session_id;
+		icon = LLUICtrlFactory::instance().create<LLGroupIconCtrl>(icon_params);
+
+		mSessions[session_id] = floaterp;
+		floaterp->mCloseSignal.connect(boost::bind(&LLFloaterIMContainer::onCloseFloater, this, session_id));
+	}
+	else
+	{   LLUUID avatar_id = session_id.notNull()?
+		    LLIMModel::getInstance()->getOtherParticipantID(session_id) : LLUUID();
+
+		LLAvatarIconCtrl::Params icon_params;
+		icon_params.avatar_id = avatar_id;
+		icon = LLUICtrlFactory::instance().create<LLAvatarIconCtrl>(icon_params);
+
+		mSessions[session_id] = floaterp;
+		floaterp->mCloseSignal.connect(boost::bind(&LLFloaterIMContainer::onCloseFloater, this, session_id));
+	}
+
+	// forced resize of the floater
+	LLRect wrapper_rect = this->mTabContainer->getLocalRect();
+	floaterp->setRect(wrapper_rect);
+
+	mTabContainer->setTabImage(floaterp, icon);
+}
+
+
+void LLFloaterIMContainer::onCloseFloater(LLUUID& id)
+{
+	mSessions.erase(id);
+	setFocus(TRUE);
+}
+
+// virtual
+void LLFloaterIMContainer::computeResizeLimits(S32& new_min_width, S32& new_min_height)
+{
+	// possibly increase floater's minimum height according to children's minimums
+	for (S32 tab_idx = 0; tab_idx < mTabContainer->getTabCount(); ++tab_idx)
+	{
+		LLFloater* floaterp = dynamic_cast<LLFloater*>(mTabContainer->getPanelByIndex(tab_idx));
+		if (floaterp)
+		{
+			new_min_height = llmax(new_min_height, floaterp->getMinHeight());
+		}
+	}
+
+	S32 conversations_pane_min_dim = mConversationsPane->getRelevantMinDim();
+	S32 messages_pane_min_dim = mMessagesPane->getRelevantMinDim();
+
+	// set floater's minimum width according to relevant minimal children's dimensionals
+	new_min_width = conversations_pane_min_dim + messages_pane_min_dim + LLPANEL_BORDER_WIDTH*2;
+}
+
+void LLFloaterIMContainer::onNewMessageReceived(const LLSD& data)
+{
+	LLUUID session_id = data["session_id"].asUUID();
+	LLFloater* floaterp = get_ptr_in_map(mSessions, session_id);
+	LLFloater* current_floater = LLMultiFloater::getActiveFloater();
+
+	if(floaterp && current_floater && floaterp != current_floater)
+	{
+		if(LLMultiFloater::isFloaterFlashing(floaterp))
+			LLMultiFloater::setFloaterFlashing(floaterp, FALSE);
+		LLMultiFloater::setFloaterFlashing(floaterp, TRUE);
+	}
+}
+
+void LLFloaterIMContainer::onExpandCollapseButtonClicked()
+{
+	if (mConversationsPane->isCollapsed() && mMessagesPane->isCollapsed()
+			&& gSavedPerAccountSettings.getBOOL("ConversationsExpandMessagePaneFirst"))
+	{
+		// Expand the messages pane from ultra minimized state
+		// if it was collapsed last in order.
+		collapseMessagesPane(false);
+	}
+	else
+	{
+		collapseConversationsPane(!mConversationsPane->isCollapsed());
+	}
+	selectConversation(mSelectedSession);
+}
+
+LLFloaterIMContainer* LLFloaterIMContainer::findInstance()
+{
+	return LLFloaterReg::findTypedInstance<LLFloaterIMContainer>("im_container");
+}
+
+LLFloaterIMContainer* LLFloaterIMContainer::getInstance()
+{
+	return LLFloaterReg::getTypedInstance<LLFloaterIMContainer>("im_container");
+}
+
+// Update all participants in the conversation lists
+void LLFloaterIMContainer::processParticipantsStyleUpdate()
+{
+	// On each session in mConversationsItems
+	for (conversations_items_map::iterator it_session = mConversationsItems.begin(); it_session != mConversationsItems.end(); it_session++)
+	{
+		// Get the current session descriptors
+		LLConversationItem* session_model = it_session->second;
+		// Iterate through each model participant child
+		LLFolderViewModelItemCommon::child_list_t::const_iterator current_participant_model = session_model->getChildrenBegin();
+		LLFolderViewModelItemCommon::child_list_t::const_iterator end_participant_model = session_model->getChildrenEnd();
+		while (current_participant_model != end_participant_model)
+		{
+			LLConversationItemParticipant* participant_model = dynamic_cast<LLConversationItemParticipant*>(*current_participant_model);
+			// Get the avatar name for this participant id from the cache and update the model
+			participant_model->fetchAvatarName();
+			// Next participant
+			current_participant_model++;
+		}
+	}
+}
+
+// static
+void LLFloaterIMContainer::idle(void* user_data)
+{
+	LLFloaterIMContainer* self = static_cast<LLFloaterIMContainer*>(user_data);
+	
+	// Update the distance to agent in the nearby chat session if required
+	// Note: it makes no sense of course to update the distance in other session
+	if (self->mConversationViewModel.getSorter().getSortOrderParticipants() == LLConversationFilter::SO_DISTANCE)
+	{
+		self->setNearbyDistances();
+	}
+	self->mConversationsRoot->update();
+}
+
+bool LLFloaterIMContainer::onConversationModelEvent(const LLSD& event)
+{
+	// For debug only
+	//std::ostringstream llsd_value;
+	//llsd_value << LLSDOStreamer<LLSDNotationFormatter>(event) << std::endl;
+	//llinfos << "LLFloaterIMContainer::onConversationModelEvent, event = " << llsd_value.str() << llendl;
+	// end debug
+	
+	// Note: In conversations, the model is not responsible for creating the view, which is a good thing. This means that
+	// the model could change substantially and the view could echo only a portion of this model (though currently the 
+	// conversation view does echo the conversation model 1 to 1).
+	// Consequently, the participant views need to be created either by the session view or by the container panel.
+	// For the moment, we create them here, at the container level, to conform to the pattern implemented in llinventorypanel.cpp 
+	// (see LLInventoryPanel::buildNewViews()).
+
+	std::string type = event.get("type").asString();
+	LLUUID session_id = event.get("session_uuid").asUUID();
+	LLUUID participant_id = event.get("participant_uuid").asUUID();
+
+	LLConversationViewSession* session_view = dynamic_cast<LLConversationViewSession*>(get_ptr_in_map(mConversationsWidgets,session_id));
+	if (!session_view)
+	{
+		// We skip events that are not associated with a session
+		return false;
+	}
+	LLConversationViewParticipant* participant_view = session_view->findParticipant(participant_id);
+    LLFloaterIMSessionTab *conversation_floater = (session_id.isNull() ? (LLFloaterIMSessionTab*)(LLFloaterReg::findTypedInstance<LLFloaterIMNearbyChat>("nearby_chat")) : (LLFloaterIMSessionTab*)(LLFloaterIMSession::findInstance(session_id)));
+
+	if (type == "remove_participant")
+	{
+		// Remove a participant view from the hierarchical conversation list
+		if (participant_view)
+		{
+			session_view->extractItem(participant_view);
+			delete participant_view;
+			session_view->refresh();
+			mConversationsRoot->arrangeAll();
+		}
+		// Remove a participant view from the conversation floater 
+		if (conversation_floater)
+		{
+			conversation_floater->removeConversationViewParticipant(participant_id);
+		}
+	}
+	else if (type == "add_participant")
+	{
+		LLConversationItemSession* session_model = dynamic_cast<LLConversationItemSession*>(mConversationsItems[session_id]);
+		LLConversationItemParticipant* participant_model = (session_model ? session_model->findParticipant(participant_id) : NULL);
+		if (!participant_view && session_model && participant_model)
+		{
+			LLIMModel::LLIMSession * im_sessionp = LLIMModel::getInstance()->findIMSession(session_id);
+			if (session_id.isNull() || (im_sessionp && !im_sessionp->isP2PSessionType()))
+			{
+				participant_view = createConversationViewParticipant(participant_model);
+				participant_view->addToFolder(session_view);
+				participant_view->setVisible(TRUE);
+			}
+		}
+		// Add a participant view to the conversation floater 
+		if (conversation_floater && participant_model)
+		{
+			conversation_floater->addConversationViewParticipant(participant_model);
+		}
+	}
+	else if (type == "update_participant")
+	{
+		// Update the participant view in the hierarchical conversation list
+		if (participant_view)
+		{
+			participant_view->refresh();
+		}
+		// Update the participant view in the conversation floater 
+		if (conversation_floater)
+		{
+			conversation_floater->updateConversationViewParticipant(participant_id);
+		}
+	}
+	else if (type == "update_session")
+	{
+		session_view->refresh();
+		if (conversation_floater)
+		{
+			conversation_floater->refreshConversation();
+		}
+	}
+	
+	mConversationViewModel.requestSortAll();
+	mConversationsRoot->arrangeAll();
+	
+	return false;
+}
+
+void LLFloaterIMContainer::draw()
+{
+	if (mTabContainer->getTabCount() == 0)
+	{
+		// Do not close the container when every conversation is torn off because the user
+		// still needs the conversation list. Simply collapse the message pane in that case.
+		collapseMessagesPane(true);
+	}
+	LLFloater::draw();
+}
+
+void LLFloaterIMContainer::tabClose()
+{
+	if (mTabContainer->getTabCount() == 0)
+	{
+		// Do not close the container when every conversation is torn off because the user
+		// still needs the conversation list. Simply collapse the message pane in that case.
+		collapseMessagesPane(true);
+	}
+}
+
+void LLFloaterIMContainer::setVisible(BOOL visible)
+{	LLFloaterIMNearbyChat* nearby_chat;
+	if (visible)
+	{
+		// Make sure we have the Nearby Chat present when showing the conversation container
+		nearby_chat = LLFloaterReg::findTypedInstance<LLFloaterIMNearbyChat>("nearby_chat");
+		if (nearby_chat == NULL)
+		{
+			// If not found, force the creation of the nearby chat conversation panel
+			// *TODO: find a way to move this to XML as a default panel or something like that
+			LLSD name("nearby_chat");
+			LLFloaterReg::toggleInstanceOrBringToFront(name);
+		}
+		openNearbyChat();
+	}
+
+	nearby_chat = LLFloaterReg::findTypedInstance<LLFloaterIMNearbyChat>("nearby_chat");
+	if (nearby_chat)
+	{
+		LLFloaterIMSessionTab::addToHost(LLUUID());
+	}
+
+	// We need to show/hide all the associated conversations that have been torn off
+	// (and therefore, are not longer managed by the multifloater),
+	// so that they show/hide with the conversations manager.
+	conversations_widgets_map::iterator widget_it = mConversationsWidgets.begin();
+	for (;widget_it != mConversationsWidgets.end(); ++widget_it)
+	{
+		LLConversationViewSession* widget = dynamic_cast<LLConversationViewSession*>(widget_it->second);
+		if (widget)
+		{
+		    widget->setVisibleIfDetached(visible);
+		}
+	}
+	
+	// Now, do the normal multifloater show/hide
+	LLMultiFloater::setVisible(visible);
+	
+}
+
+void LLFloaterIMContainer::collapseMessagesPane(bool collapse)
+{
+	if (mMessagesPane->isCollapsed() == collapse)
+	{
+		return;
+	}
+
+	if (collapse)
+	{
+		// Save the messages pane width before collapsing it.
+		gSavedPerAccountSettings.setS32("ConversationsMessagePaneWidth", mMessagesPane->getRect().getWidth());
+
+		// Save the order in which the panels are closed to reverse user's last action.
+		gSavedPerAccountSettings.setBOOL("ConversationsExpandMessagePaneFirst", mConversationsPane->isCollapsed());
+	}
+
+	// Save left pane rectangle before collapsing/expanding right pane.
+	LLRect prevRect = mConversationsPane->getRect();
+
+	// Show/hide the messages pane.
+	mConversationsStack->collapsePanel(mMessagesPane, collapse);
+
+	if (!collapse)
+	{
+		// Make sure layout is updated before resizing conversation pane.
+		mConversationsStack->updateLayout();
+	}
+
+	updateState(collapse, gSavedPerAccountSettings.getS32("ConversationsMessagePaneWidth"));
+	if (!collapse)
+	{
+		// Restore conversation's pane previous width after expanding messages pane.
+		mConversationsPane->setTargetDim(prevRect.getWidth());
+	}
+}
+void LLFloaterIMContainer::collapseConversationsPane(bool collapse)
+{
+	if (mConversationsPane->isCollapsed() == collapse)
+	{
+		return;
+	}
+
+	LLView* button_panel = getChild<LLView>("conversations_pane_buttons_expanded");
+	button_panel->setVisible(!collapse);
+	mExpandCollapseBtn->setImageOverlay(getString(collapse ? "expand_icon" : "collapse_icon"));
+
+	if (collapse)
+	{
+		// Save the conversations pane width before collapsing it.
+		gSavedPerAccountSettings.setS32("ConversationsListPaneWidth", mConversationsPane->getRect().getWidth());
+
+		// Save the order in which the panels are closed to reverse user's last action.
+		gSavedPerAccountSettings.setBOOL("ConversationsExpandMessagePaneFirst", !mMessagesPane->isCollapsed());
+	}
+
+	mConversationsStack->collapsePanel(mConversationsPane, collapse);
+
+	S32 collapsed_width = mConversationsPane->getMinDim();
+	updateState(collapse, gSavedPerAccountSettings.getS32("ConversationsListPaneWidth") - collapsed_width);
+
+	for (conversations_widgets_map::iterator widget_it = mConversationsWidgets.begin();
+			widget_it != mConversationsWidgets.end(); ++widget_it)
+	{
+		LLConversationViewSession* widget = dynamic_cast<LLConversationViewSession*>(widget_it->second);
+		if (widget)
+		{
+		    widget->toggleMinimizedMode(collapse);
+
+		    // force closing all open conversations when collapsing to minimized state
+		    if (collapse)
+		    {
+		    	widget->setOpen(false);
+		    }
+}
+	}
+}
+
+void LLFloaterIMContainer::updateState(bool collapse, S32 delta_width)
+{
+	LLRect floater_rect = getRect();
+	floater_rect.mRight += ((collapse ? -1 : 1) * delta_width);
+
+	// Set by_user = true so that reshaped rect is saved in user_settings.
+	setShape(floater_rect, true);
+
+	updateResizeLimits();
+
+	bool is_left_pane_expanded = !mConversationsPane->isCollapsed();
+	bool is_right_pane_expanded = !mMessagesPane->isCollapsed();
+
+	setCanResize(is_left_pane_expanded || is_right_pane_expanded);
+	setCanMinimize(is_left_pane_expanded || is_right_pane_expanded);
+
+    // force set correct size for the title after show/hide minimize button
+	LLRect cur_rect = getRect();
+	LLRect force_rect = cur_rect;
+	force_rect.mRight = cur_rect.mRight + 1;
+    setRect(force_rect);
+    setRect(cur_rect);
+
+    // restore floater's resize limits (prevent collapse when left panel is expanded)
+	if (is_left_pane_expanded && !is_right_pane_expanded)
+	{
+		S32 expanded_min_size = mConversationsPane->getExpandedMinDim();
+        setResizeLimits(expanded_min_size, expanded_min_size);
+	}
+
+}
+
+void LLFloaterIMContainer::onAddButtonClicked()
+{
+    LLView * button = findChild<LLView>("conversations_pane_buttons_expanded")->findChild<LLButton>("add_btn");
+    LLFloater* root_floater = gFloaterView->getParentFloater(this);
+    LLFloaterAvatarPicker* picker = LLFloaterAvatarPicker::show(boost::bind(&LLFloaterIMContainer::onAvatarPicked, this, _1), TRUE, TRUE, TRUE, root_floater->getName(), button);
+    
+    if (picker && root_floater)
+    {
+        root_floater->addDependentFloater(picker);
+    }
+}
+
+void LLFloaterIMContainer::onAvatarPicked(const uuid_vec_t& ids)
+{
+    if (ids.size() == 1)
+    {
+        LLAvatarActions::startIM(ids.back());
+    }
+    else
+    {
+        LLAvatarActions::startConference(ids);
+    }
+}
+
+void LLFloaterIMContainer::onCustomAction(const LLSD& userdata)
+{
+	std::string command = userdata.asString();
+
+	if ("sort_sessions_by_type" == command)
+	{
+		setSortOrderSessions(LLConversationFilter::SO_SESSION_TYPE);
+	}
+	if ("sort_sessions_by_name" == command)
+	{
+		setSortOrderSessions(LLConversationFilter::SO_NAME);
+	}
+	if ("sort_sessions_by_recent" == command)
+	{
+		setSortOrderSessions(LLConversationFilter::SO_DATE);
+	}
+	if ("sort_participants_by_name" == command)
+	{
+		setSortOrderParticipants(LLConversationFilter::SO_NAME);
+	}
+	if ("sort_participants_by_recent" == command)
+	{
+		setSortOrderParticipants(LLConversationFilter::SO_DATE);
+	}
+	if ("sort_participants_by_distance" == command)
+	{
+		setSortOrderParticipants(LLConversationFilter::SO_DISTANCE);
+	}
+	if ("chat_preferences" == command)
+	{
+		LLFloaterPreference* floater_prefs = LLFloaterReg::showTypedInstance<LLFloaterPreference>("preferences");
+		if (floater_prefs)
+		{
+			LLTabContainer* tab_container = floater_prefs->getChild<LLTabContainer>("pref core");
+			LLPanel* chat_panel = tab_container->getPanelByName("chat");
+			if (tab_container && chat_panel)
+			{
+				tab_container->selectTabPanel(chat_panel);
+			}
+		}
+	}
+}
+
+BOOL LLFloaterIMContainer::isActionChecked(const LLSD& userdata)
+{
+	LLConversationSort order = mConversationViewModel.getSorter();
+	std::string command = userdata.asString();
+	if ("sort_sessions_by_type" == command)
+	{
+		return (order.getSortOrderSessions() == LLConversationFilter::SO_SESSION_TYPE);
+	}
+	if ("sort_sessions_by_name" == command)
+	{
+		return (order.getSortOrderSessions() == LLConversationFilter::SO_NAME);
+	}
+	if ("sort_sessions_by_recent" == command)
+	{
+		return (order.getSortOrderSessions() == LLConversationFilter::SO_DATE);
+	}
+	if ("sort_participants_by_name" == command)
+	{
+		return (order.getSortOrderParticipants() == LLConversationFilter::SO_NAME);
+	}
+	if ("sort_participants_by_recent" == command)
+	{
+		return (order.getSortOrderParticipants() == LLConversationFilter::SO_DATE);
+	}
+	if ("sort_participants_by_distance" == command)
+	{
+		return (order.getSortOrderParticipants() == LLConversationFilter::SO_DISTANCE);
+	}
+	
+	return FALSE;
+}
+
+void LLFloaterIMContainer::setSortOrderSessions(const LLConversationFilter::ESortOrderType order)
+{
+	LLConversationSort old_order = mConversationViewModel.getSorter();
+	if (order != old_order.getSortOrderSessions())
+	{
+		old_order.setSortOrderSessions(order);
+		setSortOrder(old_order);
+	}
+}
+
+void LLFloaterIMContainer::setSortOrderParticipants(const LLConversationFilter::ESortOrderType order)
+{
+	LLConversationSort old_order = mConversationViewModel.getSorter();
+	if (order != old_order.getSortOrderParticipants())
+	{
+		old_order.setSortOrderParticipants(order);
+		setSortOrder(old_order);
+	}
+}
+
+void LLFloaterIMContainer::setSortOrder(const LLConversationSort& order)
+{
+	mConversationViewModel.setSorter(order);
+	mConversationsRoot->arrangeAll();
+	// try to keep selection onscreen, even if it wasn't to start with
+	mConversationsRoot->scrollToShowSelection();
+	
+	// Notify all conversation (torn off or not) of the change to the sort order
+	// Note: For the moment, the sort order is *unique* across all conversations. That might change in the future.
+	for (conversations_items_map::iterator it_session = mConversationsItems.begin(); it_session != mConversationsItems.end(); it_session++)
+	{
+		LLUUID session_id = it_session->first;
+		LLFloaterIMSessionTab *conversation_floater = (session_id.isNull() ? (LLFloaterIMSessionTab*)(LLFloaterReg::findTypedInstance<LLFloaterIMNearbyChat>("nearby_chat")) : (LLFloaterIMSessionTab*)(LLFloaterIMSession::findInstance(session_id)));
+		if (conversation_floater)
+		{
+			conversation_floater->setSortOrder(order);
+		}
+	}
+	
+	gSavedSettings.setU32("ConversationSortOrder", (U32)order);
+}
+
+void LLFloaterIMContainer::getSelectedUUIDs(uuid_vec_t& selected_uuids)
+{
+    const std::set<LLFolderViewItem*> selectedItems = mConversationsRoot->getSelectionList();
+
+    std::set<LLFolderViewItem*>::const_iterator it = selectedItems.begin();
+    const std::set<LLFolderViewItem*>::const_iterator it_end = selectedItems.end();
+    LLConversationItem * conversationItem;
+
+    for (; it != it_end; ++it)
+    {
+        conversationItem = static_cast<LLConversationItem *>((*it)->getViewModelItem());
+        selected_uuids.push_back(conversationItem->getUUID());
+    }
+}
+
+const LLConversationItem * LLFloaterIMContainer::getCurSelectedViewModelItem()
+{
+    LLConversationItem * conversationItem = NULL;
+
+    if(mConversationsRoot && 
+        mConversationsRoot->getCurSelectedItem() && 
+        mConversationsRoot->getCurSelectedItem()->getViewModelItem())
+    {
+        conversationItem = static_cast<LLConversationItem *>(mConversationsRoot->getCurSelectedItem()->getViewModelItem());
+    }
+
+    return conversationItem;
+}
+
+void LLFloaterIMContainer::getParticipantUUIDs(uuid_vec_t& selected_uuids)
+{
+    //Find the conversation floater associated with the selected id
+    const LLConversationItem * conversationItem = getCurSelectedViewModelItem();
+
+    if(conversationItem->getType() == LLConversationItem::CONV_PARTICIPANT)
+    {
+        getSelectedUUIDs(selected_uuids);
+    }
+    //When a one-on-one conversation exists, retrieve the participant id from the conversation floater
+    else if(conversationItem->getType() == LLConversationItem::CONV_SESSION_1_ON_1)
+    {
+        LLFloaterIMSession *conversationFloater = LLFloaterIMSession::findInstance(conversationItem->getUUID());
+        LLUUID participantID = conversationFloater->getOtherParticipantUUID();
+        selected_uuids.push_back(participantID);
+    }    
+}
+
+void LLFloaterIMContainer::doToParticipants(const std::string& command, uuid_vec_t& selectedIDS)
+{
+	if(selectedIDS.size() > 0)
+	{
+		const LLUUID& userID = selectedIDS.front();
+		if(gAgent.getID() != userID)
+		{
+			if ("view_profile" == command)
+			{
+				LLAvatarActions::showProfile(userID);
+			}
+			else if("im" == command)
+			{
+				LLAvatarActions::startIM(userID);
+			}
+			else if("offer_teleport" == command)
+			{
+				LLAvatarActions::offerTeleport(selectedIDS);
+			}
+			else if("voice_call" == command)
+			{
+				LLAvatarActions::startCall(userID);
+			}
+			else if("chat_history" == command)
+			{
+				LLAvatarActions::viewChatHistory(userID);
+			}
+			else if("add_friend" == command)
+			{
+				LLAvatarActions::requestFriendshipDialog(userID);
+			}
+			else if("remove_friend" == command)
+			{
+				LLAvatarActions::removeFriendDialog(userID);
+			}
+			else if("invite_to_group" == command)
+			{
+				LLAvatarActions::inviteToGroup(userID);
+			}
+			else if("map" == command)
+			{
+				LLAvatarActions::showOnMap(userID);
+			}
+			else if("share" == command)
+			{
+				LLAvatarActions::share(userID);
+			}
+			else if("pay" == command)
+			{
+				LLAvatarActions::pay(userID);
+			}
+			else if("block_unblock" == command)
+			{
+				LLAvatarActions::toggleBlock(userID);
+			}
+			else if("selected" == command || "mute_all" == command || "unmute_all" == command)
+			{
+				moderateVoice(command, userID);
+			}
+			else if ("toggle_allow_text_chat" == command)
+			{
+				toggleAllowTextChat(userID);
+			}
+		}
+	}
+}
+
+void LLFloaterIMContainer::doToSelectedConversation(const std::string& command, uuid_vec_t& selectedIDS)
+{
+    //Find the conversation floater associated with the selected id
+    const LLConversationItem * conversationItem = getCurSelectedViewModelItem();
+    LLFloaterIMSession *conversationFloater = LLFloaterIMSession::findInstance(conversationItem->getUUID());
+
+    if(conversationFloater)
+    {
+        //Close the selected conversation
+        if("close_conversation" == command)
+        {
+            LLFloater::onClickClose(conversationFloater);
+        }
+        else if("open_voice_conversation" == command)
+        {
+            gIMMgr->startCall(conversationItem->getUUID());
+        }
+        else if("disconnect_from_voice" == command)
+        {
+            gIMMgr->endCall(conversationItem->getUUID());
+        }
+        else if("chat_history" == command)
+        {
+			const LLIMModel::LLIMSession* session = LLIMModel::getInstance()->findIMSession(conversationItem->getUUID());
+
+			if (NULL != session)
+			{
+				const LLUUID session_id = session->isOutgoingAdHoc() ? session->generateOutgouigAdHocHash() : session->mSessionID;
+				LLFloaterReg::showInstance("preview_conversation", session_id, true);
+			}
+        }
+        else
+        {
+            doToParticipants(command, selectedIDS);
+        }
+    }
+}
+
+void LLFloaterIMContainer::doToSelected(const LLSD& userdata)
+{
+    std::string command = userdata.asString();
+    const LLConversationItem * conversationItem = getCurSelectedViewModelItem();
+    uuid_vec_t selected_uuids;
+
+    if(conversationItem != NULL)
+    {
+    	getParticipantUUIDs(selected_uuids);
+
+    	if(conversationItem->getType() == LLConversationItem::CONV_PARTICIPANT)
+    	{
+    		doToParticipants(command, selected_uuids);
+    	}
+    	else
+    	{
+    		doToSelectedConversation(command, selected_uuids);
+    	}
+    }
+}
+
+void LLFloaterIMContainer::doToSelectedGroup(const LLSD& userdata)
+{
+    std::string action = userdata.asString();
+    LLUUID selected_group = getCurSelectedViewModelItem()->getUUID();
+
+    if (action == "group_profile")
+    {
+        LLGroupActions::show(selected_group);
+    }
+    else if (action == "activate_group")
+    {
+        LLGroupActions::activate(selected_group);
+    }
+    else if (action == "leave_group")
+    {
+        LLGroupActions::leave(selected_group);
+    }
+}
+
+bool LLFloaterIMContainer::enableContextMenuItem(const LLSD& userdata)
+{
+    std::string item = userdata.asString();
+	uuid_vec_t uuids;
+	getParticipantUUIDs(uuids);
+
+    if(item == std::string("can_activate_group"))
+    {
+    	LLUUID selected_group_id = getCurSelectedViewModelItem()->getUUID();
+    	return gAgent.getGroupID() != selected_group_id;
+    }
+
+	if(uuids.size() <= 0)
+    {
+        return false;
+    }
+
+    // Note: can_block and can_delete is used only for one person selected menu
+    // so we don't need to go over all uuids.
+
+    if (item == std::string("can_block"))
+    {
+		const LLUUID& id = uuids.front();
+        return LLAvatarActions::canBlock(id);
+    }
+    else if (item == std::string("can_add"))
+    {
+        // We can add friends if:
+        // - there are selected people
+        // - and there are no friends among selection yet.
+
+        //EXT-7389 - disable for more than 1
+		if(uuids.size() > 1)
+        {
+            return false;
+        }
+
+        bool result = true;
+
+        uuid_vec_t::const_iterator
+			id = uuids.begin(),
+			uuids_end = uuids.end();
+
+        for (;id != uuids_end; ++id)
+        {
+            if ( LLAvatarActions::isFriend(*id) )
+            {
+                result = false;
+                break;
+            }
+        }
+
+        return result;
+    }
+    else if (item == std::string("can_delete"))
+    {
+        // We can remove friends if:
+        // - there are selected people
+        // - and there are only friends among selection.
+
+        bool result = (uuids.size() > 0);
+
+        uuid_vec_t::const_iterator
+			id = uuids.begin(),
+			uuids_end = uuids.end();
+
+        for (;id != uuids_end; ++id)
+        {
+            if ( !LLAvatarActions::isFriend(*id) )
+            {
+                result = false;
+                break;
+            }
+        }
+
+        return result;
+    }
+    else if (item == std::string("can_call"))
+    {
+        return LLAvatarActions::canCall();
+    }
+    else if (item == std::string("can_show_on_map"))
+    {
+		const LLUUID& id = uuids.front();
+
+        return (LLAvatarTracker::instance().isBuddyOnline(id) && is_agent_mappable(id))
+            || gAgent.isGodlike();
+    }
+    else if(item == std::string("can_offer_teleport"))
+    {
+		return LLAvatarActions::canOfferTeleport(uuids);
+    }
+	else if("can_moderate_voice" == item || "can_allow_text_chat" == item || "can_mute" == item || "can_unmute" == item)
+	{
+		return enableModerateContextMenuItem(item);
+	}
+
+    return false;
+}
+
+bool LLFloaterIMContainer::checkContextMenuItem(const LLSD& userdata)
+{
+    std::string item = userdata.asString();
+    uuid_vec_t mUUIDs;
+    getParticipantUUIDs(mUUIDs);
+
+    if(mUUIDs.size() > 0 )
+    {
+		if ("is_blocked" == item)
+		{
+			return LLAvatarActions::isBlocked(mUUIDs.front());
+		}
+		else if ("is_allowed_text_chat" == item)
+		{
+			const LLSpeaker * speakerp = getSpeakerOfSelectedParticipant(getSpeakerMgrForSelectedParticipant());
+
+			if (NULL != speakerp)
+			{
+				return !speakerp->mModeratorMutedText;
+			}
+		}
+    }
+
+    return false;
+}
+
+void LLFloaterIMContainer::showConversation(const LLUUID& session_id)
+{
+    setVisibleAndFrontmost(false);
+    selectConversation(session_id);    
+}
+
+// Will select only the conversation item
+void LLFloaterIMContainer::selectConversation(const LLUUID& session_id)
+{
+	LLFolderViewItem* widget = get_ptr_in_map(mConversationsWidgets,session_id);
+	if (widget)
+	{
+		(widget->getRoot())->setSelection(widget, FALSE, FALSE);
+	}
+}
+
+// Synchronous select the conversation item and the conversation floater
+BOOL LLFloaterIMContainer::selectConversationPair(const LLUUID& session_id, bool select_widget)
+{
+    BOOL handled = TRUE;
+
+    /* widget processing */
+    if (select_widget)
+    {
+    	LLFolderViewItem* widget = mConversationsWidgets[session_id];
+    	if (widget && widget->getParentFolder())
+    	{
+    		widget->getParentFolder()->setSelection(widget, FALSE, FALSE);
+    	}
+    }
+
+    /* floater processing */
+
+    if (session_id != getSelectedSession())
+    {
+        // Store the active session
+        setSelectedSession(session_id);
+
+		LLFloaterIMSessionTab* session_floater = LLFloaterIMSessionTab::getConversation(session_id);
+
+		if (session_floater->getHost())
+		{
+			// Always expand the message pane if the panel is hosted by the container
+			collapseMessagesPane(false);
+			// Switch to the conversation floater that is being selected
+			selectFloater(session_floater);
+		}
+
+		// Set the focus on the selected floater
+		if (!session_floater->hasFocus())
+		{
+			session_floater->setFocus(TRUE);
+		}
+    }
+
+    return handled;
+}
+
+void LLFloaterIMContainer::setTimeNow(const LLUUID& session_id, const LLUUID& participant_id)
+{
+	LLConversationItemSession* item = dynamic_cast<LLConversationItemSession*>(get_ptr_in_map(mConversationsItems,session_id));
+	if (item)
+	{
+		item->setTimeNow(participant_id);
+		mConversationViewModel.requestSortAll();
+		mConversationsRoot->arrangeAll();
+	}
+}
+
+void LLFloaterIMContainer::setNearbyDistances()
+{
+	// Get the nearby chat session: that's the one with uuid nul
+	LLConversationItemSession* item = dynamic_cast<LLConversationItemSession*>(get_ptr_in_map(mConversationsItems,LLUUID()));
+	if (item)
+	{
+		// Get the positions of the nearby avatars and their ids
+		std::vector<LLVector3d> positions;
+		uuid_vec_t avatar_ids;
+		LLWorld::getInstance()->getAvatars(&avatar_ids, &positions, gAgent.getPositionGlobal(), gSavedSettings.getF32("NearMeRange"));
+		// Get the position of the agent
+		const LLVector3d& me_pos = gAgent.getPositionGlobal();
+		// For each nearby avatar, compute and update the distance
+		int avatar_count = positions.size();
+		for (int i = 0; i < avatar_count; i++)
+		{
+			F64 dist = dist_vec_squared(positions[i], me_pos);
+			item->setDistance(avatar_ids[i],dist);
+		}
+		// Also does it for the agent itself
+		item->setDistance(gAgent.getID(),0.0f);
+		// Request resort
+		mConversationViewModel.requestSortAll();
+		mConversationsRoot->arrangeAll();
+	}
+}
+
+LLConversationItem* LLFloaterIMContainer::addConversationListItem(const LLUUID& uuid, bool isWidgetSelected /*= false*/)
+{
+	bool is_nearby_chat = uuid.isNull();
+
+    // Stores the display name for the conversation line item
+	std::string display_name = is_nearby_chat ? LLTrans::getString("NearbyChatLabel") : LLIMModel::instance().getName(uuid);
+
+	// Check if the item is not already in the list, exit (nothing to do)
+	// Note: this happens often, when reattaching a torn off conversation for instance
+	conversations_items_map::iterator item_it = mConversationsItems.find(uuid);
+	if (item_it != mConversationsItems.end())
+	{
+		return item_it->second;
+	}
+
+	// Remove the conversation item that might exist already: it'll be recreated anew further down anyway
+	// and nothing wrong will happen removing it if it doesn't exist
+	removeConversationListItem(uuid,false);
+
+	// Create a conversation session model
+	LLConversationItemSession* item = NULL;
+	LLSpeakerMgr* speaker_manager = (is_nearby_chat ? (LLSpeakerMgr*)(LLLocalSpeakerMgr::getInstance()) : LLIMModel::getInstance()->getSpeakerManager(uuid));
+	if (speaker_manager)
+	{
+		item = new LLParticipantList(speaker_manager, getRootViewModel());
+	}
+	if (!item)
+	{
+		llwarns << "Couldn't create conversation session item : " << display_name << llendl;
+		return NULL;
+	}
+	item->renameItem(display_name);
+	item->updateParticipantName(NULL);
+	
+	mConversationsItems[uuid] = item;
+
+	// Create a widget from it
+	LLConversationViewSession* widget = createConversationItemWidget(item);
+	mConversationsWidgets[uuid] = widget;
+
+	// Add a new conversation widget to the root folder of the folder view
+	widget->addToFolder(mConversationsRoot);
+	widget->requestArrange();
+
+	LLIMModel::LLIMSession * im_sessionp = LLIMModel::getInstance()->findIMSession(uuid);
+
+	// Create the participants widgets now
+	// Note: usually, we do not get an updated avatar list at that point
+	if (uuid.isNull() || im_sessionp && !im_sessionp->isP2PSessionType())
+	{
+		LLFolderViewModelItemCommon::child_list_t::const_iterator current_participant_model = item->getChildrenBegin();
+		LLFolderViewModelItemCommon::child_list_t::const_iterator end_participant_model = item->getChildrenEnd();
+		while (current_participant_model != end_participant_model)
+		{
+			LLConversationItem* participant_model = dynamic_cast<LLConversationItem*>(*current_participant_model);
+			LLConversationViewParticipant* participant_view = createConversationViewParticipant(participant_model);
+			participant_view->addToFolder(widget);
+			current_participant_model++;
+		}
+	}
+	// Do that too for the conversation dialog
+    LLFloaterIMSessionTab *conversation_floater = (uuid.isNull() ? (LLFloaterIMSessionTab*)(LLFloaterReg::findTypedInstance<LLFloaterIMNearbyChat>("nearby_chat")) : (LLFloaterIMSessionTab*)(LLFloaterIMSession::findInstance(uuid)));
+	if (conversation_floater)
+	{
+		conversation_floater->buildConversationViewParticipant();
+	}
+
+	// set the widget to minimized mode if conversations pane is collapsed
+	widget->toggleMinimizedMode(mConversationsPane->isCollapsed());
+
+    if (isWidgetSelected)
+    {
+        selectConversation(uuid);
+        // scroll to newly added item
+        mConversationsRoot->scrollToShowSelection();
+    }
+
+	return item;
+}
+
+bool LLFloaterIMContainer::removeConversationListItem(const LLUUID& uuid, bool change_focus)
+{
+	// Delete the widget and the associated conversation item
+	// Note : since the mConversationsItems is also the listener to the widget, deleting 
+	// the widget will also delete its listener
+	bool isWidgetSelected = false;
+	LLFolderViewItem* new_selection = NULL;
+	LLFolderViewItem* widget = get_ptr_in_map(mConversationsWidgets,uuid);
+	if (widget)
+	{
+		isWidgetSelected = widget->isSelected();
+		new_selection = mConversationsRoot->getNextFromChild(widget);
+		if(new_selection == NULL)
+		{
+			new_selection = mConversationsRoot->getPreviousFromChild(widget);
+		}
+		widget->destroyView();
+	}
+	
+	// Suppress the conversation items and widgets from their respective maps
+	mConversationsItems.erase(uuid);
+	mConversationsWidgets.erase(uuid);
+	
+	// Don't let the focus fall IW, select and refocus on the first conversation in the list
+	if (change_focus)
+	{
+		setFocus(TRUE);
+		if(new_selection != NULL)
+		{
+			LLConversationItem* vmi = dynamic_cast<LLConversationItem*>(new_selection->getViewModelItem());
+			if(vmi != NULL)
+			{
+				selectConversation(vmi->getUUID());
+			}
+		}
+	}
+	return isWidgetSelected;
+}
+
+LLConversationViewSession* LLFloaterIMContainer::createConversationItemWidget(LLConversationItem* item)
+{
+	LLConversationViewSession::Params params;
+	
+	params.name = item->getDisplayName();
+	params.root = mConversationsRoot;
+	params.listener = item;
+	params.tool_tip = params.name;
+	params.container = this;
+	
+	return LLUICtrlFactory::create<LLConversationViewSession>(params);
+}
+
+LLConversationViewParticipant* LLFloaterIMContainer::createConversationViewParticipant(LLConversationItem* item)
+{
+	LLConversationViewParticipant::Params params;
+    LLRect panel_rect = mConversationsListPanel->getRect();
+	
+	params.name = item->getDisplayName();
+	params.root = mConversationsRoot;
+	params.listener = item;
+
+    //24 is the the current hight of an item (itemHeight) loaded from conversation_view_participant.xml.
+	params.rect = LLRect (0, 24, panel_rect.getWidth(), 0);
+	params.tool_tip = params.name;
+	params.participant_id = item->getUUID();
+    params.folder_indentation = 42;
+
+	return LLUICtrlFactory::create<LLConversationViewParticipant>(params);
+}
+
+bool LLFloaterIMContainer::enableModerateContextMenuItem(const std::string& userdata)
+{
+	// only group moderators can perform actions related to this "enable callback"
+	if (!isGroupModerator())
+	{
+		return false;
+	}
+
+	LLSpeaker * speakerp = getSpeakerOfSelectedParticipant(getSpeakerMgrForSelectedParticipant());
+	if (NULL == speakerp)
+	{
+		return false;
+	}
+
+	bool voice_channel = speakerp->isInVoiceChannel();
+
+	if ("can_moderate_voice" == userdata)
+	{
+		return voice_channel;
+	}
+	else if ("can_mute" == userdata)
+	{
+		return voice_channel && !isMuted(getCurSelectedViewModelItem()->getUUID());
+	}
+	else if ("can_unmute" == userdata)
+	{
+		return voice_channel && isMuted(getCurSelectedViewModelItem()->getUUID());
+	}
+
+	// The last invoke is used to check whether the "can_allow_text_chat" will enabled
+	return LLVoiceClient::getInstance()->isParticipantAvatar(getCurSelectedViewModelItem()->getUUID());
+}
+
+bool LLFloaterIMContainer::isGroupModerator()
+{
+	LLSpeakerMgr * speaker_manager = getSpeakerMgrForSelectedParticipant();
+	if (NULL == speaker_manager)
+	{
+		llwarns << "Speaker manager is missing" << llendl;
+		return false;
+	}
+
+	// Is session a group call/chat?
+	if(gAgent.isInGroup(speaker_manager->getSessionID()))
+	{
+		LLSpeaker * speaker = speaker_manager->findSpeaker(gAgentID).get();
+
+		// Is agent a moderator?
+		return speaker && speaker->mIsModerator;
+	}
+
+	return false;
+}
+
+void LLFloaterIMContainer::moderateVoice(const std::string& command, const LLUUID& userID)
+{
+	if (!gAgent.getRegion()) return;
+
+	if (command.compare("selected"))
+	{
+		moderateVoiceAllParticipants(command.compare("mute_all"));
+	}
+	else
+	{
+		moderateVoiceParticipant(userID, isMuted(userID));
+	}
+}
+
+bool LLFloaterIMContainer::isMuted(const LLUUID& avatar_id)
+{
+	const LLSpeaker * speakerp = getSpeakerOfSelectedParticipant(getSpeakerMgrForSelectedParticipant());
+	return NULL == speakerp ? true : speakerp->mStatus == LLSpeaker::STATUS_MUTED;
+}
+
+void LLFloaterIMContainer::moderateVoiceAllParticipants(bool unmute)
+{
+	LLIMSpeakerMgr * speaker_managerp = dynamic_cast<LLIMSpeakerMgr*>(getSpeakerMgrForSelectedParticipant());
+
+	if (NULL != speaker_managerp)
+	{
+		if (!unmute)
+		{
+			LLSD payload;
+			payload["session_id"] = speaker_managerp->getSessionID();
+			LLNotificationsUtil::add("ConfirmMuteAll", LLSD(), payload, confirmMuteAllCallback);
+			return;
+		}
+
+		speaker_managerp->moderateVoiceAllParticipants(unmute);
+	}
+}
+
+// static
+void LLFloaterIMContainer::confirmMuteAllCallback(const LLSD& notification, const LLSD& response)
+{
+	S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
+	// if Cancel pressed
+	if (option == 1)
+	{
+		return;
+	}
+
+	const LLSD& payload = notification["payload"];
+	const LLUUID& session_id = payload["session_id"];
+
+	LLIMSpeakerMgr * speaker_manager = dynamic_cast<LLIMSpeakerMgr*> (
+		LLIMModel::getInstance()->getSpeakerManager(session_id));
+	if (speaker_manager)
+	{
+		speaker_manager->moderateVoiceAllParticipants(false);
+	}
+
+	return;
+}
+
+void LLFloaterIMContainer::moderateVoiceParticipant(const LLUUID& avatar_id, bool unmute)
+{
+	LLIMSpeakerMgr * speaker_managerp = dynamic_cast<LLIMSpeakerMgr *>(getSpeakerMgrForSelectedParticipant());
+
+	if (NULL != speaker_managerp)
+	{
+		speaker_managerp->moderateVoiceParticipant(avatar_id, unmute);
+	}
+}
+
+LLSpeakerMgr * LLFloaterIMContainer::getSpeakerMgrForSelectedParticipant()
+{
+	LLFolderViewItem * selected_folder_itemp = mConversationsRoot->getCurSelectedItem();
+	if (NULL == selected_folder_itemp)
+	{
+		llwarns << "Current selected item is null" << llendl;
+		return NULL;
+	}
+
+	LLFolderViewFolder * conversation_itemp = selected_folder_itemp->getParentFolder();
+
+	conversations_widgets_map::const_iterator iter = mConversationsWidgets.begin();
+	conversations_widgets_map::const_iterator end = mConversationsWidgets.end();
+	const LLUUID * conversation_uuidp = NULL;
+	while(iter != end)
+	{
+		if (iter->second == conversation_itemp)
+		{
+			conversation_uuidp = &iter->first;
+			break;
+		}
+		++iter;
+	}
+	if (NULL == conversation_uuidp)
+	{
+		llwarns << "Cannot find conversation item widget" << llendl;
+		return NULL;
+	}
+
+	return conversation_uuidp->isNull() ? (LLSpeakerMgr *)LLLocalSpeakerMgr::getInstance()
+		: LLIMModel::getInstance()->getSpeakerManager(*conversation_uuidp);
+}
+
+LLSpeaker * LLFloaterIMContainer::getSpeakerOfSelectedParticipant(LLSpeakerMgr * speaker_managerp)
+{
+	if (NULL == speaker_managerp)
+	{
+		llwarns << "Speaker manager is missing" << llendl;
+		return NULL;
+	}
+
+	const LLConversationItem * participant_itemp = getCurSelectedViewModelItem();
+	if (NULL == participant_itemp)
+	{
+		llwarns << "Cannot evaluate current selected view model item" << llendl;
+		return NULL;
+	}
+
+	return speaker_managerp->findSpeaker(participant_itemp->getUUID());
+}
+
+void LLFloaterIMContainer::toggleAllowTextChat(const LLUUID& participant_uuid)
+{
+	LLIMSpeakerMgr * speaker_managerp = dynamic_cast<LLIMSpeakerMgr*>(getSpeakerMgrForSelectedParticipant());
+	if (NULL != speaker_managerp)
+	{
+		speaker_managerp->toggleAllowTextChat(participant_uuid);
+	}
+}
+
+void LLFloaterIMContainer::openNearbyChat()
+{
+	// If there's only one conversation in the container and that conversation is the nearby chat
+	//(which it should be...), open it so to make the list of participants visible. This happens to be the most common case when opening the Chat floater.
+	if(mConversationsItems.size() == 1)
+	{
+		LLConversationViewSession* nearby_chat = dynamic_cast<LLConversationViewSession*>(mConversationsWidgets[LLUUID()]);
+		if (nearby_chat)
+		{
+			nearby_chat->setOpen(TRUE);
+		}
+	}
+}
+
+void LLFloaterIMContainer::onNearbyChatClosed()
+{
+	// If nearby chat is the only remaining conversation and it is closed, close whole conversation floater as well
+	if (mConversationsItems.size() == 1)
+		closeFloater();
+}
+
+// EOF