/** 
 * @file llfloaterinventory.cpp
 * @brief Implementation of the inventory view and associated stuff.
 *
 * $LicenseInfo:firstyear=2001&license=viewergpl$
 * 
 * Copyright (c) 2001-2009, 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 "llviewerprecompiledheaders.h"

#include <utility> // for std::pair<>

#include "llinventorypanel.h"

// Seraph TODO: Remove unnecessary headers

// library includes
#include "llagent.h"
#include "llagentwearables.h"
#include "llcallingcard.h"
#include "llfloaterreg.h"
#include "llsdserialize.h"
#include "llfiltereditor.h"
#include "llspinctrl.h"
#include "llui.h"
#include "message.h"

// newview includes
#include "llappearancemgr.h"
#include "llappviewer.h"
#include "llfirstuse.h"
#include "llfloaterchat.h"
#include "llfloatercustomize.h"
#include "llfocusmgr.h"
#include "llfolderview.h"
#include "llgesturemgr.h"
#include "lliconctrl.h"
#include "llimview.h"
#include "llinventorybridge.h"
#include "llinventoryclipboard.h"
#include "llinventorymodel.h"
#include "lllineeditor.h"
#include "llmenugl.h"
#include "llpreviewanim.h"
#include "llpreviewgesture.h"
#include "llpreviewnotecard.h"
#include "llpreviewscript.h"
#include "llpreviewsound.h"
#include "llpreviewtexture.h"
#include "llresmgr.h"
#include "llscrollbar.h"
#include "llscrollcontainer.h"
#include "llselectmgr.h"
#include "lltabcontainer.h"
#include "lltooldraganddrop.h"
#include "lluictrlfactory.h"
#include "llviewerfoldertype.h"
#include "llviewerinventory.h"
#include "llviewermessage.h"
#include "llviewerobjectlist.h"
#include "llviewerregion.h"
#include "llviewerwindow.h"
#include "llvoavatarself.h"
#include "llwearablelist.h"
#include "llimfloater.h"

static LLDefaultChildRegistry::Register<LLInventoryPanel> r("inventory_panel");

const std::string LLInventoryPanel::DEFAULT_SORT_ORDER = std::string("InventorySortOrder");
const std::string LLInventoryPanel::RECENTITEMS_SORT_ORDER = std::string("RecentItemsSortOrder");
const std::string LLInventoryPanel::INHERIT_SORT_ORDER = std::string("");
static const LLInventoryFVBridgeBuilder INVENTORY_BRIDGE_BUILDER;

LLInventoryPanel::LLInventoryPanel(const LLInventoryPanel::Params& p) :	
	LLPanel(p),
	mInventoryObserver(NULL),
	mFolders(NULL),
	mScroller(NULL),
	mSortOrderSetting(p.sort_order_setting),
	mInventory(p.inventory),
	mAllowMultiSelect(p.allow_multi_select),
	mHasInventoryConnection(false),
	mStartFolderString(p.start_folder),	
	mBuildDefaultHierarchy(true),
	mInvFVBridgeBuilder(NULL)
{
	mInvFVBridgeBuilder = &INVENTORY_BRIDGE_BUILDER;

	// contex menu callbacks
	mCommitCallbackRegistrar.add("Inventory.DoToSelected", boost::bind(&LLInventoryPanel::doToSelected, this, _2));
	mCommitCallbackRegistrar.add("Inventory.EmptyTrash", boost::bind(&LLInventoryModel::emptyFolderType, &gInventory, "ConfirmEmptyTrash", LLFolderType::FT_TRASH));
	mCommitCallbackRegistrar.add("Inventory.EmptyLostAndFound", boost::bind(&LLInventoryModel::emptyFolderType, &gInventory, "ConfirmEmptyLostAndFound", LLFolderType::FT_LOST_AND_FOUND));
	mCommitCallbackRegistrar.add("Inventory.DoCreate", boost::bind(&LLInventoryPanel::doCreate, this, _2));
	mCommitCallbackRegistrar.add("Inventory.AttachObject", boost::bind(&LLInventoryPanel::attachObject, this, _2));
	mCommitCallbackRegistrar.add("Inventory.BeginIMSession", boost::bind(&LLInventoryPanel::beginIMSession, this));
	
	setBackgroundColor(LLUIColorTable::instance().getColor("InventoryBackgroundColor"));
	setBackgroundVisible(TRUE);
	setBackgroundOpaque(TRUE);
}

BOOL LLInventoryPanel::postBuild()
{
	LLMemType mt(LLMemType::MTYPE_INVENTORY_POST_BUILD);

	mCommitCallbackRegistrar.pushScope(); // registered as a widget; need to push callback scope ourselves
	
	// create root folder
	{
		LLRect folder_rect(0,
						   0,
						   getRect().getWidth(),
						   0);
		LLFolderView::Params p;
		p.name = getName();
		p.rect = folder_rect;
		p.parent_panel = this;
		mFolders = LLUICtrlFactory::create<LLFolderView>(p);
		mFolders->setAllowMultiSelect(mAllowMultiSelect);
	}

	mCommitCallbackRegistrar.popScope();
	
	mFolders->setCallbackRegistrar(&mCommitCallbackRegistrar);
	
	// scroller
	{
		LLRect scroller_view_rect = getRect();
		scroller_view_rect.translate(-scroller_view_rect.mLeft, -scroller_view_rect.mBottom);
		LLScrollContainer::Params p;
		p.name("Inventory Scroller");
		p.rect(scroller_view_rect);
		p.follows.flags(FOLLOWS_ALL);
		p.reserve_scroll_corner(true);
		p.tab_stop(true);
		mScroller = LLUICtrlFactory::create<LLScrollContainer>(p);
	}
	addChild(mScroller);
	mScroller->addChild(mFolders);
	
	mFolders->setScrollContainer(mScroller);

	// set up the callbacks from the inventory we're viewing, and then
	// build everything.
	mInventoryObserver = new LLInventoryPanelObserver(this);
	mInventory->addObserver(mInventoryObserver);

	// determine the root folder, if any, so inventory contents show just the children
	// of that folder (i.e. not including the folder itself).
	const LLFolderType::EType preferred_type = LLViewerFolderType::lookupTypeFromNewCategoryName(mStartFolderString);

	if ("INVENTORY" == mStartFolderString)
	{
		mStartFolderID = gInventory.getRootFolderID();
	}
	else if ("LIBRARY" == mStartFolderString)
	{
		mStartFolderID = gInventory.getLibraryRootFolderID();
	}
	else
	{
		mStartFolderID = (preferred_type != LLFolderType::FT_NONE ? gInventory.findCategoryUUIDForType(preferred_type) : LLUUID::null);
	}

	// build view of inventory if we need default full hierarchy and inventory ready, otherwise wait for modelChanged() callback
	if (mBuildDefaultHierarchy && mInventory->isInventoryUsable() && !mHasInventoryConnection)
	{
		rebuildViewsFor(mStartFolderID);
		mHasInventoryConnection = true;
	}

	// bit of a hack to make sure the inventory is open.
	mFolders->openFolder(preferred_type != LLFolderType::FT_NONE ? LLViewerFolderType::lookupNewCategoryName(preferred_type) : "My Inventory");

	if (mSortOrderSetting != INHERIT_SORT_ORDER)
	{
		setSortOrder(gSavedSettings.getU32(mSortOrderSetting));
	}
	else
	{
		setSortOrder(gSavedSettings.getU32(DEFAULT_SORT_ORDER));
	}
	mFolders->setSortOrder(mFolders->getFilter()->getSortOrder());

	return TRUE;
}

LLInventoryPanel::~LLInventoryPanel()
{
	// should this be a global setting?
	if (mFolders)
	{
		U32 sort_order = mFolders->getSortOrder();
		if (mSortOrderSetting != INHERIT_SORT_ORDER)
		{
			gSavedSettings.setU32(mSortOrderSetting, sort_order);
		}
	}

	// LLView destructor will take care of the sub-views.
	mInventory->removeObserver(mInventoryObserver);
	delete mInventoryObserver;
	mScroller = NULL;
}

LLMemType mt(LLMemType::MTYPE_INVENTORY_FROM_XML); // ! BUG ! Should this be removed?
void LLInventoryPanel::draw()
{
	// select the desired item (in case it wasn't loaded when the selection was requested)
	mFolders->updateSelection();
	LLPanel::draw();
}

LLInventoryFilter* LLInventoryPanel::getFilter()
{
	if (mFolders) return mFolders->getFilter();
	return NULL;
}

void LLInventoryPanel::setFilterTypes(U64 filter_types, BOOL filter_for_categories)
{
	mFolders->getFilter()->setFilterTypes(filter_types, filter_for_categories);
}	

void LLInventoryPanel::setFilterPermMask(PermissionMask filter_perm_mask)
{
	mFolders->getFilter()->setFilterPermissions(filter_perm_mask);
}

void LLInventoryPanel::setFilterSubString(const std::string& string)
{
	mFolders->getFilter()->setFilterSubString(string);
}

void LLInventoryPanel::setSortOrder(U32 order)
{
	mFolders->getFilter()->setSortOrder(order);
	if (mFolders->getFilter()->isModified())
	{
		mFolders->setSortOrder(order);
		// try to keep selection onscreen, even if it wasn't to start with
		mFolders->scrollToShowSelection();
	}
}

void LLInventoryPanel::setSinceLogoff(BOOL sl)
{
	mFolders->getFilter()->setDateRangeLastLogoff(sl);
}

void LLInventoryPanel::setHoursAgo(U32 hours)
{
	mFolders->getFilter()->setHoursAgo(hours);
}

void LLInventoryPanel::setShowFolderState(LLInventoryFilter::EFolderShow show)
{
	mFolders->getFilter()->setShowFolderState(show);
}

LLInventoryFilter::EFolderShow LLInventoryPanel::getShowFolderState()
{
	return mFolders->getFilter()->getShowFolderState();
}

static LLFastTimer::DeclareTimer FTM_REFRESH("Inventory Refresh");

void LLInventoryPanel::modelChanged(U32 mask)
{
	LLFastTimer t2(FTM_REFRESH);

	bool handled = false;

	// inventory just initialized, do complete build
	if ((mask & LLInventoryObserver::ADD) && gInventory.getChangedIDs().empty() && !mHasInventoryConnection)
	{
		rebuildViewsFor(mStartFolderID);
		mHasInventoryConnection = true;
		return;
	}

	if(mask & LLInventoryObserver::LABEL)
	{
		handled = true;
		// label change - empty out the display name for each object
		// in this change set.
		const std::set<LLUUID>& changed_items = gInventory.getChangedIDs();
		std::set<LLUUID>::const_iterator id_it = changed_items.begin();
		std::set<LLUUID>::const_iterator id_end = changed_items.end();
		LLFolderViewItem* view = NULL;
		LLInvFVBridge* bridge = NULL;
		for (;id_it != id_end; ++id_it)
		{
			view = mFolders->getItemByID(*id_it);
			if(view)
			{
				// request refresh on this item (also flags for filtering)
				bridge = (LLInvFVBridge*)view->getListener();
				if(bridge)
				{	// Clear the display name first, so it gets properly re-built during refresh()
					bridge->clearDisplayName();
				}
				view->refresh();
			}
		}
	}
	if((mask & (LLInventoryObserver::STRUCTURE
				| LLInventoryObserver::ADD
				| LLInventoryObserver::REMOVE)) != 0)
	{
		handled = true;
		// Record which folders are open by uuid.
		LLInventoryModel* model = getModel();
		if (model)
		{
			const std::set<LLUUID>& changed_items = gInventory.getChangedIDs();

			std::set<LLUUID>::const_iterator id_it = changed_items.begin();
			std::set<LLUUID>::const_iterator id_end = changed_items.end();
			for (;id_it != id_end; ++id_it)
			{
				// sync view with model
				LLInventoryObject* model_item = model->getObject(*id_it);
				LLFolderViewItem* view_item = mFolders->getItemByID(*id_it);

				if (model_item)
				{
					if (!view_item)
					{
						// this object was just created, need to build a view for it
						if ((mask & LLInventoryObserver::ADD) != LLInventoryObserver::ADD)
						{
							llwarns << *id_it << " is in model but not in view, but ADD flag not set" << llendl;
						}
						buildNewViews(*id_it);
						
						// select any newly created object
						// that has the auto rename at top of folder
						// root set
						if(mFolders->getRoot()->needsAutoRename())
						{
							setSelection(*id_it, FALSE);
						}
					}
					else
					{
						// this object was probably moved, check its parent
						if ((mask & LLInventoryObserver::STRUCTURE) != LLInventoryObserver::STRUCTURE)
						{
							llwarns << *id_it << " is in model and in view, but STRUCTURE flag not set" << llendl;
						}

						LLFolderViewFolder* new_parent = (LLFolderViewFolder*)mFolders->getItemByID(model_item->getParentUUID());

						// added check against NULL for cases when Inventory panel contains startFolder.
						// in this case parent is LLFolderView (LLInventoryPanel::mFolders) itself.
						// this check is a fix for bug EXT-1859.
						if (NULL != new_parent && view_item->getParentFolder() != new_parent)
						{
							view_item->getParentFolder()->extractItem(view_item);
							view_item->addToFolder(new_parent, mFolders);
						}
/*
						 on the other side in case Inventory Panel has content of the any folder
						 it is possible that item moved to some folder which is absent in current
						 Panel. For ex. removing item (via moving to trash).
						 In this case we need to check if new parent is other then inventory start folder
						 and simply remove its View from the hierarchy.
						 See details in EXT-2098.
*/
						// So, let check if item was moved into folder out of this Inventory Panel.
						else if (mStartFolderID.notNull() && NULL == new_parent && model_item->getParentUUID() != mStartFolderID)
						{
							view_item->getParentFolder()->extractItem(view_item);
						}
					}
				}
				else
				{
					if (view_item)
					{
						if ((mask & LLInventoryObserver::REMOVE) != LLInventoryObserver::REMOVE)
						{
							llwarns << *id_it << " is not in model but in view, but REMOVE flag not set" << llendl;
						}
						// item in view but not model, need to delete view
						view_item->destroyView();
					}
					else
					{
						llwarns << *id_it << "Item does not exist in either view or model, but notification triggered" << llendl;
					}
				}
			}
		}
	}

	if (!handled)
	{
		// it's a small change that only requires a refresh.
		// *TODO: figure out a more efficient way to do the refresh
		// since it is expensive on large inventories
		mFolders->refresh();
	}
}


void LLInventoryPanel::rebuildViewsFor(const LLUUID& id)
{
	LLFolderViewItem* old_view = NULL;

	// get old LLFolderViewItem
	old_view = mFolders->getItemByID(id);
	if (old_view && id.notNull())
	{
		old_view->destroyView();
	}

	buildNewViews(id);
}

void LLInventoryPanel::buildNewViews(const LLUUID& id)
{
	LLMemType mt(LLMemType::MTYPE_INVENTORY_BUILD_NEW_VIEWS);
	LLFolderViewItem* itemp = NULL;
	LLInventoryObject* objectp = NULL;

	// Don't add the start folder (the inventory panel will show contents
	// beginning with the children of the starting folder, excluding the starting folder itself).
	if (id != mStartFolderID)
	{
		objectp = gInventory.getObject(id);
		if (objectp)
		{		
			const LLUUID &parent_id = objectp->getParentUUID();
			// If this item's parent is the starting folder, then just add it to the top level (recall that 
			// the starting folder isn't actually represented in the view, parent_folder would be NULL in
			// this case otherwise).
			LLFolderViewFolder* parent_folder = (parent_id == mStartFolderID ?
				mFolders : (LLFolderViewFolder*)mFolders->getItemByID(parent_id));

			// This item exists outside the inventory's hierarchy, so don't add it.
			if (!parent_folder)
			{
				return;
			}

			if (objectp->getType() <= LLAssetType::AT_NONE ||
				objectp->getType() >= LLAssetType::AT_COUNT)
			{
				llwarns << "LLInventoryPanel::buildNewViews called with invalid objectp->mType : " << 
					((S32) objectp->getType()) << llendl;
				return;
			}
			
			if (objectp->getType() == LLAssetType::AT_CATEGORY &&
					 objectp->getActualType() != LLAssetType::AT_LINK_FOLDER) 
			{
				LLInvFVBridge* new_listener = mInvFVBridgeBuilder->createBridge(objectp->getType(),
																				objectp->getType(),
																				LLInventoryType::IT_CATEGORY,
																				this,
																				objectp->getUUID());

				if (new_listener)
				{
					LLFolderViewFolder::Params p;
					p.name = new_listener->getDisplayName();
					p.icon = new_listener->getIcon();
					p.root = mFolders;
					p.listener = new_listener;
					LLFolderViewFolder* folderp = LLUICtrlFactory::create<LLFolderViewFolder>(p);
				
					folderp->setItemSortOrder(mFolders->getSortOrder());
					itemp = folderp;
				}
			}
			else 
			{
				// Build new view for item
				LLInventoryItem* item = (LLInventoryItem*)objectp;
				LLInvFVBridge* new_listener = mInvFVBridgeBuilder->createBridge(item->getType(),
																				item->getActualType(),
																				item->getInventoryType(),
																				this,
																				item->getUUID(),
																				item->getFlags());

				if (new_listener)
				{
					LLFolderViewItem::Params params;
					params.name(new_listener->getDisplayName());
					params.icon(new_listener->getIcon());
					params.creation_date(new_listener->getCreationDate());
					params.root(mFolders);
					params.listener(new_listener);
					params.rect(LLRect (0, 0, 0, 0));
					itemp = LLUICtrlFactory::create<LLFolderViewItem> (params);
				}
			}

			if (itemp)
			{
				itemp->addToFolder(parent_folder, mFolders);
			}
		}
	}

	// If this is a folder, add the children of the folder and recursively add any 
	// child folders.
	if ((id == mStartFolderID) ||
		(objectp && objectp->getType() == LLAssetType::AT_CATEGORY))
	{
		LLViewerInventoryCategory::cat_array_t* categories;
		LLViewerInventoryItem::item_array_t* items;

		mInventory->lockDirectDescendentArrays(id, categories, items);
		if(categories)
		{
			S32 count = categories->count();
			for(S32 i = 0; i < count; ++i)
			{
				LLInventoryCategory* cat = categories->get(i);
				buildNewViews(cat->getUUID());
			}
		}
		if(items)
		{
			S32 count = items->count();
			for(S32 i = 0; i < count; ++i)
			{
				LLInventoryItem* item = items->get(i);
				buildNewViews(item->getUUID());
			}
		}
		mInventory->unlockDirectDescendentArrays(id);
	}
}

struct LLConfirmPurgeData
{
	LLUUID mID;
	LLInventoryModel* mModel;
};

class LLIsNotWorn : public LLInventoryCollectFunctor
{
public:
	LLIsNotWorn() {}
	virtual ~LLIsNotWorn() {}
	virtual bool operator()(LLInventoryCategory* cat,
							LLInventoryItem* item)
	{
		return !gAgentWearables.isWearingItem(item->getUUID());
	}
};

class LLOpenFolderByID : public LLFolderViewFunctor
{
public:
	LLOpenFolderByID(const LLUUID& id) : mID(id) {}
	virtual ~LLOpenFolderByID() {}
	virtual void doFolder(LLFolderViewFolder* folder)
		{
			if (folder->getListener() && folder->getListener()->getUUID() == mID) folder->setOpenArrangeRecursively(TRUE, LLFolderViewFolder::RECURSE_UP);
		}
	virtual void doItem(LLFolderViewItem* item) {}
protected:
	const LLUUID& mID;
};


void LLInventoryPanel::openSelected()
{
	LLFolderViewItem* folder_item = mFolders->getCurSelectedItem();
	if(!folder_item) return;
	LLInvFVBridge* bridge = (LLInvFVBridge*)folder_item->getListener();
	if(!bridge) return;
	bridge->openItem();
}

BOOL LLInventoryPanel::handleHover(S32 x, S32 y, MASK mask)
{
	BOOL handled = LLView::handleHover(x, y, mask);
	if(handled)
	{
		ECursorType cursor = getWindow()->getCursor();
		if (LLInventoryModel::backgroundFetchActive() && cursor == UI_CURSOR_ARROW)
		{
			// replace arrow cursor with arrow and hourglass cursor
			getWindow()->setCursor(UI_CURSOR_WORKING);
		}
	}
	else
	{
		getWindow()->setCursor(UI_CURSOR_ARROW);
	}
	return TRUE;
}

BOOL LLInventoryPanel::handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
								   EDragAndDropType cargo_type,
								   void* cargo_data,
								   EAcceptance* accept,
								   std::string& tooltip_msg)
{

	BOOL handled = LLPanel::handleDragAndDrop(x, y, mask, drop, cargo_type, cargo_data, accept, tooltip_msg);

	if (handled)
	{
		mFolders->setDragAndDropThisFrame();
	}

	return handled;
}

void LLInventoryPanel::onFocusLost()
{
	// inventory no longer handles cut/copy/paste/delete
	if (LLEditMenuHandler::gEditMenuHandler == mFolders)
	{
		LLEditMenuHandler::gEditMenuHandler = NULL;
	}

	LLPanel::onFocusLost();
}

void LLInventoryPanel::onFocusReceived()
{
	// inventory now handles cut/copy/paste/delete
	LLEditMenuHandler::gEditMenuHandler = mFolders;

	LLPanel::onFocusReceived();
}


void LLInventoryPanel::openAllFolders()
{
	mFolders->setOpenArrangeRecursively(TRUE, LLFolderViewFolder::RECURSE_DOWN);
	mFolders->arrangeAll();
}

void LLInventoryPanel::openDefaultFolderForType(LLFolderType::EType type)
{
	LLUUID category_id = mInventory->findCategoryUUIDForType(type);
	LLOpenFolderByID opener(category_id);
	mFolders->applyFunctorRecursively(opener);
}

void LLInventoryPanel::setSelection(const LLUUID& obj_id, BOOL take_keyboard_focus)
{
	// Don't select objects in COF (e.g. to prevent refocus when items are worn).
	const LLInventoryObject *obj = gInventory.getObject(obj_id);
	if (obj && obj->getParentUUID() == LLAppearanceManager::getCOF())
	{
		return;
	}
	mFolders->setSelectionByID(obj_id, take_keyboard_focus);
}

void LLInventoryPanel::clearSelection()
{
	mFolders->clearSelection();
}

void LLInventoryPanel::onSelectionChange(const std::deque<LLFolderViewItem*>& items, BOOL user_action)
{
	LLFolderView* fv = getRootFolder();
	if (fv->needsAutoRename()) // auto-selecting a new user-created asset and preparing to rename
	{
		fv->setNeedsAutoRename(FALSE);
		if (items.size()) // new asset is visible and selected
		{
			fv->startRenamingSelectedItem();
		}
	}
	// Seraph - Put determineFolderType in here for ensemble typing?
}

//----------------------------------------------------------------------------

void LLInventoryPanel::doToSelected(const LLSD& userdata)
{
	mFolders->doToSelected(&gInventory, userdata);
}

void LLInventoryPanel::doCreate(const LLSD& userdata)
{
	menu_create_inventory_item(mFolders, LLFolderBridge::sSelf, userdata);
}

bool LLInventoryPanel::beginIMSession()
{
	std::set<LLUUID> selected_items;
	mFolders->getSelectionList(selected_items);

	std::string name;
	static int session_num = 1;

	LLDynamicArray<LLUUID> members;
	EInstantMessage type = IM_SESSION_CONFERENCE_START;

	std::set<LLUUID>::const_iterator iter;
	for (iter = selected_items.begin(); iter != selected_items.end(); iter++)
	{

		LLUUID item = *iter;
		LLFolderViewItem* folder_item = mFolders->getItemByID(item);
			
		if(folder_item) 
		{
			LLFolderViewEventListener* fve_listener = folder_item->getListener();
			if (fve_listener && (fve_listener->getInventoryType() == LLInventoryType::IT_CATEGORY))
			{

				LLFolderBridge* bridge = (LLFolderBridge*)folder_item->getListener();
				if(!bridge) return true;
				LLViewerInventoryCategory* cat = bridge->getCategory();
				if(!cat) return true;
				name = cat->getName();
				LLUniqueBuddyCollector is_buddy;
				LLInventoryModel::cat_array_t cat_array;
				LLInventoryModel::item_array_t item_array;
				gInventory.collectDescendentsIf(bridge->getUUID(),
												cat_array,
												item_array,
												LLInventoryModel::EXCLUDE_TRASH,
												is_buddy);
				S32 count = item_array.count();
				if(count > 0)
				{
					LLFloaterReg::showInstance("communicate");
					// create the session
					LLAvatarTracker& at = LLAvatarTracker::instance();
					LLUUID id;
					for(S32 i = 0; i < count; ++i)
					{
						id = item_array.get(i)->getCreatorUUID();
						if(at.isBuddyOnline(id))
						{
							members.put(id);
						}
					}
				}
			}
			else
			{
				LLFolderViewItem* folder_item = mFolders->getItemByID(item);
				if(!folder_item) return true;
				LLInvFVBridge* listenerp = (LLInvFVBridge*)folder_item->getListener();

				if (listenerp->getInventoryType() == LLInventoryType::IT_CALLINGCARD)
				{
					LLInventoryItem* inv_item = gInventory.getItem(listenerp->getUUID());

					if (inv_item)
					{
						LLAvatarTracker& at = LLAvatarTracker::instance();
						LLUUID id = inv_item->getCreatorUUID();

						if(at.isBuddyOnline(id))
						{
							members.put(id);
						}
					}
				} //if IT_CALLINGCARD
			} //if !IT_CATEGORY
		}
	} //for selected_items	

	// the session_id is randomly generated UUID which will be replaced later
	// with a server side generated number

	if (name.empty())
	{
		name = llformat("Session %d", session_num++);
	}

	LLUUID session_id = gIMMgr->addSession(name, type, members[0], members);
	if (session_id != LLUUID::null)
	{
		LLIMFloater::show(session_id);
	}
		
	return true;
}

bool LLInventoryPanel::attachObject(const LLSD& userdata)
{
	std::set<LLUUID> selected_items;
	mFolders->getSelectionList(selected_items);

	std::string joint_name = userdata.asString();
	LLVOAvatar *avatarp = static_cast<LLVOAvatar*>(gAgent.getAvatarObject());
	LLViewerJointAttachment* attachmentp = NULL;
	for (LLVOAvatar::attachment_map_t::iterator iter = avatarp->mAttachmentPoints.begin(); 
		 iter != avatarp->mAttachmentPoints.end(); )
	{
		LLVOAvatar::attachment_map_t::iterator curiter = iter++;
		LLViewerJointAttachment* attachment = curiter->second;
		if (attachment->getName() == joint_name)
		{
			attachmentp = attachment;
			break;
		}
	}
	if (attachmentp == NULL)
	{
		return true;
	}

	for (std::set<LLUUID>::const_iterator set_iter = selected_items.begin(); 
		 set_iter != selected_items.end(); 
		 ++set_iter)
	{
		const LLUUID &id = *set_iter;
		LLViewerInventoryItem* item = (LLViewerInventoryItem*)gInventory.getItem(id);
		if(item && gInventory.isObjectDescendentOf(id, gInventory.getRootFolderID()))
		{
			rez_attachment(item, attachmentp);
		}
		else if(item && item->isComplete())
		{
			// must be in library. copy it to our inventory and put it on.
			LLPointer<LLInventoryCallback> cb = new RezAttachmentCallback(attachmentp);
			copy_inventory_item(gAgent.getID(),
								item->getPermissions().getOwner(),
								item->getUUID(),
								LLUUID::null,
								std::string(),
								cb);
		}
	}
	gFocusMgr.setKeyboardFocus(NULL);

	return true;
}


//----------------------------------------------------------------------------

// static DEBUG ONLY:
void LLInventoryPanel::dumpSelectionInformation(void* user_data)
{
	LLInventoryPanel* iv = (LLInventoryPanel*)user_data;
	iv->mFolders->dumpSelectionInformation();
}

BOOL LLInventoryPanel::getSinceLogoff()
{
	return mFolders->getFilter()->isSinceLogoff();
}

void example_param_block_usage()
{
	LLInventoryPanel::Params param_block;
	param_block.name(std::string("inventory"));

	param_block.sort_order_setting(LLInventoryPanel::RECENTITEMS_SORT_ORDER);
	param_block.allow_multi_select(true);
	param_block.filter(LLInventoryPanel::Filter()
			.sort_order(1)
			.types(0xffff0000));
	param_block.inventory(&gInventory);
	param_block.has_border(true);

	LLUICtrlFactory::create<LLInventoryPanel>(param_block);

	param_block = LLInventoryPanel::Params();
	param_block.name(std::string("inventory"));

	//LLSD param_block_sd;
	//param_block_sd["sort_order_setting"] = LLInventoryPanel::RECENTITEMS_SORT_ORDER;
	//param_block_sd["allow_multi_select"] = true;
	//param_block_sd["filter"]["sort_order"] = 1;
	//param_block_sd["filter"]["types"] = (S32)0xffff0000;
	//param_block_sd["has_border"] = true;

	//LLInitParam::LLSDParser(param_block_sd).parse(param_block);

	LLUICtrlFactory::create<LLInventoryPanel>(param_block);
}