/**
 * @file lloutfitslist.cpp
 * @brief List of agent's outfits for My Appearance side panel.
 *
 * $LicenseInfo:firstyear=2010&license=viewergpl$
 *
 * 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 "llviewerprecompiledheaders.h"

#include "lloutfitslist.h"

// llcommon
#include "llcommonutils.h"

#include "llaccordionctrl.h"
#include "llaccordionctrltab.h"
#include "llagentwearables.h"
#include "llappearancemgr.h"
#include "llinventoryfunctions.h"
#include "llinventorymodel.h"
#include "lllistcontextmenu.h"
#include "llnotificationsutil.h"
#include "lloutfitobserver.h"
#include "llsidetray.h"
#include "lltransutil.h"
#include "llviewermenu.h"
#include "llvoavatar.h"
#include "llvoavatarself.h"
#include "llwearableitemslist.h"

static bool is_tab_header_clicked(LLAccordionCtrlTab* tab, S32 y);

static const LLOutfitTabNameComparator OUTFIT_TAB_NAME_COMPARATOR;

/*virtual*/
bool LLOutfitTabNameComparator::compare(const LLAccordionCtrlTab* tab1, const LLAccordionCtrlTab* tab2) const
{
	std::string name1 = tab1->getTitle();
	std::string name2 = tab2->getTitle();

	LLStringUtil::toUpper(name1);
	LLStringUtil::toUpper(name2);

	return name1 < name2;
}

//////////////////////////////////////////////////////////////////////////

class LLOutfitListGearMenu
{
public:
	LLOutfitListGearMenu(LLOutfitsList* olist)
	:	mOutfitList(olist),
		mMenu(NULL)
	{
		llassert_always(mOutfitList);

		LLUICtrl::CommitCallbackRegistry::ScopedRegistrar registrar;
		LLUICtrl::EnableCallbackRegistry::ScopedRegistrar enable_registrar;

		registrar.add("Gear.Wear", boost::bind(&LLOutfitListGearMenu::onWear, this));
		registrar.add("Gear.TakeOff", boost::bind(&LLOutfitListGearMenu::onTakeOff, this));
		registrar.add("Gear.Rename", boost::bind(&LLOutfitListGearMenu::onRename, this));
		registrar.add("Gear.Delete", boost::bind(&LLOutfitListGearMenu::onDelete, this));
		registrar.add("Gear.Create", boost::bind(&LLOutfitListGearMenu::onCreate, this, _2));

		registrar.add("Gear.WearAdd", boost::bind(&LLOutfitListGearMenu::onAdd, this));

		enable_registrar.add("Gear.OnEnable", boost::bind(&LLOutfitsList::isActionEnabled, mOutfitList, _2));
		enable_registrar.add("Gear.OnVisible", boost::bind(&LLOutfitListGearMenu::onVisible, this, _2));

		mMenu = LLUICtrlFactory::getInstance()->createFromFile<LLMenuGL>(
			"menu_outfit_gear.xml", gMenuHolder, LLViewerMenuHolderGL::child_registry_t::instance());
		llassert(mMenu);
	}

	void show(LLView* spawning_view)
	{
		if (!mMenu) return;

		updateItemsVisibility();
		mMenu->buildDrawLabels();
		mMenu->updateParent(LLMenuGL::sMenuContainer);
		S32 menu_x = 0;
		S32 menu_y = spawning_view->getRect().getHeight() + mMenu->getRect().getHeight();
		LLMenuGL::showPopup(spawning_view, mMenu, menu_x, menu_y);
	}

	void updateItemsVisibility()
	{
		if (!mMenu) return;

		bool have_selection = getSelectedOutfitID().notNull();
		mMenu->setItemVisible("sepatator1", have_selection);
		mMenu->setItemVisible("sepatator2", have_selection);
		mMenu->arrangeAndClear(); // update menu height
	}

private:
	const LLUUID& getSelectedOutfitID()
	{
		return mOutfitList->getSelectedOutfitUUID();
	}

	LLViewerInventoryCategory* getSelectedOutfit()
	{
		const LLUUID& selected_outfit_id = getSelectedOutfitID();
		if (selected_outfit_id.isNull())
		{
			return NULL;
		}

		LLViewerInventoryCategory* cat = gInventory.getCategory(selected_outfit_id);
		return cat;
	}

	void onWear()
	{
		LLViewerInventoryCategory* selected_outfit = getSelectedOutfit();
		if (selected_outfit)
		{
			LLAppearanceMgr::instance().wearInventoryCategory(
				selected_outfit, /*copy=*/ FALSE, /*append=*/ FALSE);
		}
	}

	void onAdd()
	{
		const LLUUID& selected_id = getSelectedOutfitID();

		if (selected_id.notNull())
		{
			LLAppearanceMgr::getInstance()->addCategoryToCurrentOutfit(selected_id);
		}
	}

	void onTakeOff()
	{
		// Take off selected items if there are any
		if (mOutfitList->hasItemSelected())
		{
			uuid_vec_t selected_uuids;
			mOutfitList->getSelectedItemsUUIDs(selected_uuids);

			for (uuid_vec_t::const_iterator it=selected_uuids.begin(); it != selected_uuids.end(); ++it)
			{
				if (get_is_item_worn(*it))
				{
					LLAppearanceMgr::instance().removeItemFromAvatar(*it);
				}
			}
		}
		else // or take off the whole selected outfit if no items specified.
		{
			const LLUUID& selected_outfit_id = getSelectedOutfitID();
			if (selected_outfit_id.notNull())
			{
				LLAppearanceMgr::instance().takeOffOutfit(selected_outfit_id);
			}
		}
	}

	void onRename()
	{
		const LLUUID& selected_outfit_id = getSelectedOutfitID();
		if (selected_outfit_id.notNull())
		{
			LLAppearanceMgr::instance().renameOutfit(selected_outfit_id);
		}
	}

	void onDelete()
	{
		const LLUUID& selected_outfit_id = getSelectedOutfitID();
		if (selected_outfit_id.notNull())
		{
			remove_category(&gInventory, selected_outfit_id);
		}
	}

	void onCreate(const LLSD& data)
	{
		LLWearableType::EType type = LLWearableType::typeNameToType(data.asString());
		if (type == LLWearableType::WT_NONE)
		{
			llwarns << "Invalid wearable type" << llendl;
			return;
		}

		LLAgentWearables::createWearable(type, true);
	}

	bool onVisible(LLSD::String param)
	{
		const LLUUID& selected_outfit_id = getSelectedOutfitID();
		if (selected_outfit_id.isNull()) // no selection or invalid outfit selected
		{
			return false;
		}

		// *TODO This condition leads to menu item behavior inconsistent with
		// "Wear" button behavior and should be modified or removed.
		bool is_worn = LLAppearanceMgr::instance().getBaseOutfitUUID() == selected_outfit_id;

		if ("wear" == param)
		{
			return !is_worn;
		}

		return true;
	}

	LLOutfitsList*	mOutfitList;
	LLMenuGL*		mMenu;
};

//////////////////////////////////////////////////////////////////////////

class LLOutfitContextMenu : public LLListContextMenu
{
protected:
	/* virtual */ LLContextMenu* createMenu()
	{
		LLUICtrl::CommitCallbackRegistry::ScopedRegistrar registrar;
		LLUICtrl::EnableCallbackRegistry::ScopedRegistrar enable_registrar;
		LLUUID selected_id = mUUIDs.front();

		registrar.add("Outfit.WearReplace",
			boost::bind(&LLAppearanceMgr::replaceCurrentOutfit, &LLAppearanceMgr::instance(), selected_id));
		registrar.add("Outfit.WearAdd",
			boost::bind(&LLAppearanceMgr::addCategoryToCurrentOutfit, &LLAppearanceMgr::instance(), selected_id));
		registrar.add("Outfit.TakeOff",
				boost::bind(&LLAppearanceMgr::takeOffOutfit, &LLAppearanceMgr::instance(), selected_id));
		registrar.add("Outfit.Edit", boost::bind(editOutfit));
		registrar.add("Outfit.Rename", boost::bind(renameOutfit, selected_id));
		registrar.add("Outfit.Delete", boost::bind(deleteOutfit, selected_id));

		enable_registrar.add("Outfit.OnEnable", boost::bind(&LLOutfitContextMenu::onEnable, this, _2));
		enable_registrar.add("Outfit.OnVisible", boost::bind(&LLOutfitContextMenu::onVisible, this, _2));

		return createFromFile("menu_outfit_tab.xml");
	}

	bool onEnable(LLSD::String param)
	{
		LLUUID outfit_cat_id = mUUIDs.back();

		if ("rename" == param)
		{
			return get_is_category_renameable(&gInventory, outfit_cat_id);
		}
		else if ("wear_replace" == param)
		{
			return LLAppearanceMgr::instance().getCanReplaceCOF(outfit_cat_id);
		}
		else if ("wear_add" == param)
		{
			return LLAppearanceMgr::getCanAddToCOF(outfit_cat_id);
		}
		else if ("take_off" == param)
		{
			return LLAppearanceMgr::getCanRemoveFromCOF(outfit_cat_id);
		}

		return true;
	}

	bool onVisible(LLSD::String param)
	{
		LLUUID outfit_cat_id = mUUIDs.back();
		bool is_worn = LLAppearanceMgr::instance().getBaseOutfitUUID() == outfit_cat_id;

		if ("edit" == param)
		{
			return is_worn;
		}
		else if ("wear_replace" == param)
		{
			return !is_worn;
		}
		else if ("delete" == param)
		{
			return LLAppearanceMgr::instance().getCanRemoveOutfit(outfit_cat_id);
		}

		return true;
	}

	static void editOutfit()
	{
		LLSideTray::getInstance()->showPanel("sidepanel_appearance", LLSD().with("type", "edit_outfit"));
	}

	static void renameOutfit(const LLUUID& outfit_cat_id)
	{
		LLAppearanceMgr::instance().renameOutfit(outfit_cat_id);
	}

	static void deleteOutfit(const LLUUID& outfit_cat_id)
	{
		remove_category(&gInventory, outfit_cat_id);
	}
};

//////////////////////////////////////////////////////////////////////////

static LLRegisterPanelClassWrapper<LLOutfitsList> t_outfits_list("outfits_list");

LLOutfitsList::LLOutfitsList()
	:	LLPanelAppearanceTab()
	,	mAccordion(NULL)
	,	mListCommands(NULL)
	,	mIsInitialized(false)
	,	mItemSelected(false)
{
	mCategoriesObserver = new LLInventoryCategoriesObserver();

	mGearMenu = new LLOutfitListGearMenu(this);
	mOutfitMenu = new LLOutfitContextMenu();
}

LLOutfitsList::~LLOutfitsList()
{
	delete mGearMenu;
	delete mOutfitMenu;

	if (gInventory.containsObserver(mCategoriesObserver))
	{
		gInventory.removeObserver(mCategoriesObserver);
		delete mCategoriesObserver;
	}
}

BOOL LLOutfitsList::postBuild()
{
	mAccordion = getChild<LLAccordionCtrl>("outfits_accordion");
	mAccordion->setComparator(&OUTFIT_TAB_NAME_COMPARATOR);

	return TRUE;
}

//virtual
void LLOutfitsList::onOpen(const LLSD& /*info*/)
{
	if (!mIsInitialized)
	{
		// *TODO: I'm not sure is this check necessary but it never match while developing.
		if (!gInventory.isInventoryUsable())
			return;

		const LLUUID outfits = gInventory.findCategoryUUIDForType(LLFolderType::FT_MY_OUTFITS);

		// *TODO: I'm not sure is this check necessary but it never match while developing.
		LLViewerInventoryCategory* category = gInventory.getCategory(outfits);
		if (!category)
			return;

		gInventory.addObserver(mCategoriesObserver);

		// Start observing changes in "My Outfits" category.
		mCategoriesObserver->addCategory(outfits,
			boost::bind(&LLOutfitsList::refreshList, this, outfits));

		const LLUUID cof = gInventory.findCategoryUUIDForType(LLFolderType::FT_CURRENT_OUTFIT);

		// Start observing changes in Current Outfit category.
		mCategoriesObserver->addCategory(cof, boost::bind(&LLOutfitsList::onCOFChanged, this));

		LLOutfitObserver::instance().addBOFChangedCallback(boost::bind(&LLOutfitsList::highlightBaseOutfit, this));
		LLOutfitObserver::instance().addBOFReplacedCallback(boost::bind(&LLOutfitsList::highlightBaseOutfit, this));

		// Fetch "My Outfits" contents and refresh the list to display
		// initially fetched items. If not all items are fetched now
		// the observer will refresh the list as soon as the new items
		// arrive.
		category->fetch();
		refreshList(outfits);
		highlightBaseOutfit();

		mIsInitialized = true;
	}
}

void LLOutfitsList::refreshList(const LLUUID& category_id)
{
	LLInventoryModel::cat_array_t cat_array;
	LLInventoryModel::item_array_t item_array;

	// Collect all sub-categories of a given category.
	LLIsType is_category(LLAssetType::AT_CATEGORY);
	gInventory.collectDescendentsIf(
		category_id,
		cat_array,
		item_array,
		LLInventoryModel::EXCLUDE_TRASH,
		is_category);

	uuid_vec_t vadded;
	uuid_vec_t vremoved;

	// Create added and removed items vectors.
	computeDifference(cat_array, vadded, vremoved);

	// Handle added tabs.
	for (uuid_vec_t::const_iterator iter = vadded.begin();
		 iter != vadded.end();
		 ++iter)
	{
		const LLUUID cat_id = (*iter);
		LLViewerInventoryCategory *cat = gInventory.getCategory(cat_id);
		if (!cat) continue;

		std::string name = cat->getName();

		static LLXMLNodePtr accordionXmlNode = getAccordionTabXMLNode();
		LLAccordionCtrlTab* tab = LLUICtrlFactory::defaultBuilder<LLAccordionCtrlTab>(accordionXmlNode, NULL, NULL);

		tab->setName(name);
		tab->setTitle(name);

		// *TODO: LLUICtrlFactory::defaultBuilder does not use "display_children" from xml. Should be investigated.
		tab->setDisplayChildren(false);
		mAccordion->addCollapsibleCtrl(tab);

		// Start observing the new outfit category.
		LLWearableItemsList* list  = tab->getChild<LLWearableItemsList>("wearable_items_list");
		if (!mCategoriesObserver->addCategory(cat_id, boost::bind(&LLWearableItemsList::updateList, list, cat_id)))
		{
			// Remove accordion tab if category could not be added to observer.
			mAccordion->removeCollapsibleCtrl(tab);

			// kill removed tab
			if (tab != NULL)
			{
				tab->die();
			}
			continue;
		}

		// Map the new tab with outfit category UUID.
		mOutfitsMap.insert(LLOutfitsList::outfits_map_value_t(cat_id, tab));

		tab->setRightMouseDownCallback(boost::bind(&LLOutfitsList::onAccordionTabRightClick, this,
			_1, _2, _3, cat_id));

		// Setting tab focus callback to monitor currently selected outfit.
		tab->setFocusReceivedCallback(boost::bind(&LLOutfitsList::changeOutfitSelection, this, list, cat_id));

		// Setting callback to reset items selection inside outfit on accordion collapsing and expanding (EXT-7875)
		tab->setDropDownStateChangedCallback(boost::bind(&LLOutfitsList::resetItemSelection, this, list, cat_id));

		// force showing list items that don't match current filter(EXT-7158)
		list->setForceShowingUnmatchedItems(true);

		// Setting list commit callback to monitor currently selected wearable item.
		list->setCommitCallback(boost::bind(&LLOutfitsList::onSelectionChange, this, _1));

		// Setting list refresh callback to apply filter on list change.
		list->setRefreshCompleteCallback(boost::bind(&LLOutfitsList::onFilteredWearableItemsListRefresh, this, _1));

		list->setRightMouseDownCallback(boost::bind(&LLOutfitsList::onWearableItemsListRightClick, this, _1, _2, _3));

		// Fetch the new outfit contents.
		cat->fetch();

		// Refresh the list of outfit items after fetch().
		// Further list updates will be triggered by the category observer.
		list->updateList(cat_id);

		// If filter is currently applied we store the initial tab state and
		// open it to show matched items if any.
		if (!sFilterSubString.empty())
		{
			tab->notifyChildren(LLSD().with("action","store_state"));
			tab->setDisplayChildren(true);

			// Setting mForceRefresh flag will make the list refresh its contents
			// even if it is not currently visible. This is required to apply the
			// filter to the newly added list.
			list->setForceRefresh(true);

			list->setFilterSubString(sFilterSubString);
		}
	}

	// Handle removed tabs.
	for (uuid_vec_t::const_iterator iter=vremoved.begin(); iter != vremoved.end(); ++iter)
	{
		outfits_map_t::iterator outfits_iter = mOutfitsMap.find((*iter));
		if (outfits_iter != mOutfitsMap.end())
		{
			const LLUUID& outfit_id = outfits_iter->first;
			LLAccordionCtrlTab* tab = outfits_iter->second;

			// An outfit is removed from the list. Do the following:
			// 1. Remove outfit category from observer to stop monitoring its changes.
			mCategoriesObserver->removeCategory(outfit_id);

			// 2. Remove the outfit from selection.
			deselectOutfit(outfit_id);

			// 3. Remove category UUID to accordion tab mapping.
			mOutfitsMap.erase(outfits_iter);

			// 4. Remove outfit tab from accordion.
			mAccordion->removeCollapsibleCtrl(tab);

			// kill removed tab
			if (tab != NULL)
			{
				tab->die();
			}
		}
	}

	// Get changed items from inventory model and update outfit tabs
	// which might have been renamed.
	const LLInventoryModel::changed_items_t& changed_items = gInventory.getChangedIDs();
	for (LLInventoryModel::changed_items_t::const_iterator items_iter = changed_items.begin();
		 items_iter != changed_items.end();
		 ++items_iter)
	{
		updateOutfitTab(*items_iter);
	}

	mAccordion->sort();
}

void LLOutfitsList::highlightBaseOutfit()
{
	// id of base outfit
	LLUUID base_id = LLAppearanceMgr::getInstance()->getBaseOutfitUUID();
	if (base_id != mHighlightedOutfitUUID)
	{
		if (mOutfitsMap[mHighlightedOutfitUUID])
		{
			mOutfitsMap[mHighlightedOutfitUUID]->setTitleFontStyle("NORMAL");
			mOutfitsMap[mHighlightedOutfitUUID]->setTitleColor(LLUIColorTable::instance().getColor("AccordionHeaderTextColor"));
		}

		mHighlightedOutfitUUID = base_id;
	}
	if (mOutfitsMap[base_id])
	{
		mOutfitsMap[base_id]->setTitleFontStyle("BOLD");
		mOutfitsMap[base_id]->setTitleColor(LLUIColorTable::instance().getColor("SelectedOutfitTextColor"));
	}
}

void LLOutfitsList::onSelectionChange(LLUICtrl* ctrl)
{
	LLWearableItemsList* list = dynamic_cast<LLWearableItemsList*>(ctrl);
	if (!list) return;

	LLViewerInventoryItem *item = gInventory.getItem(list->getSelectedUUID());
	if (!item) return;

	changeOutfitSelection(list, item->getParentUUID());
}

void LLOutfitsList::performAction(std::string action)
{
	if (mSelectedOutfitUUID.isNull()) return;

	LLViewerInventoryCategory* cat = gInventory.getCategory(mSelectedOutfitUUID);
	if (!cat) return;

	if ("replaceoutfit" == action)
	{
		LLAppearanceMgr::instance().wearInventoryCategory( cat, FALSE, FALSE );
	}
	else if ("addtooutfit" == action)
	{
		LLAppearanceMgr::instance().wearInventoryCategory( cat, FALSE, TRUE );
	}
	else if ("rename_outfit" == action)
	{
		LLAppearanceMgr::instance().renameOutfit(mSelectedOutfitUUID);
	}
}

void LLOutfitsList::removeSelected()
{
	if (mSelectedOutfitUUID.notNull())
	{
		remove_category(&gInventory, mSelectedOutfitUUID);
	}
}

void LLOutfitsList::setSelectedOutfitByUUID(const LLUUID& outfit_uuid)
{
	for (outfits_map_t::iterator iter = mOutfitsMap.begin();
			iter != mOutfitsMap.end();
			++iter)
	{
		if (outfit_uuid == iter->first)
		{
			LLAccordionCtrlTab* tab = iter->second;
			if (!tab) continue;

			LLWearableItemsList* list = dynamic_cast<LLWearableItemsList*>(tab->getAccordionView());
			if (!list) continue;

			tab->setFocus(TRUE);
			changeOutfitSelection(list, outfit_uuid);

			tab->setDisplayChildren(true);
		}
	}
}

// virtual
void LLOutfitsList::setFilterSubString(const std::string& string)
{
	applyFilter(string);

	sFilterSubString = string;
}

// virtual
bool LLOutfitsList::isActionEnabled(const LLSD& userdata)
{
	if (mSelectedOutfitUUID.isNull()) return false;

	const std::string command_name = userdata.asString();
	if (command_name == "delete")
	{
		return !mItemSelected && LLAppearanceMgr::instance().getCanRemoveOutfit(mSelectedOutfitUUID);
	}
	if (command_name == "rename")
	{
		return get_is_category_renameable(&gInventory, mSelectedOutfitUUID);
	}
	if (command_name == "save_outfit")
	{
		bool outfit_locked = LLAppearanceMgr::getInstance()->isOutfitLocked();
		bool outfit_dirty = LLAppearanceMgr::getInstance()->isOutfitDirty();
		// allow save only if outfit isn't locked and is dirty
		return !outfit_locked && outfit_dirty;
	}
	if (command_name == "wear")
	{
		if (gAgentWearables.isCOFChangeInProgress())
		{
			return false;
		}

		if (hasItemSelected())
		{
			return canWearSelected();
		}

		// outfit selected
		return LLAppearanceMgr::instance().getCanReplaceCOF(mSelectedOutfitUUID);
	}
	if (command_name == "take_off")
	{
		// Enable "Take Off" if any of selected items can be taken off
		// or the selected outfit contains items that can be taken off.
		return ( hasItemSelected() && canTakeOffSelected() )
				|| ( !hasItemSelected() && LLAppearanceMgr::getCanRemoveFromCOF(mSelectedOutfitUUID) );
	}

	if (command_name == "wear_add")
	{
		// *TODO: do we ever get here?
		return LLAppearanceMgr::getCanAddToCOF(mSelectedOutfitUUID);
	}

	return false;
}

// virtual
void LLOutfitsList::showGearMenu(LLView* spawning_view)
{
	if (!mGearMenu) return;
	mGearMenu->show(spawning_view);
}

void LLOutfitsList::getSelectedItemsUUIDs(uuid_vec_t& selected_uuids) const
{
	// Collect selected items from all selected lists.
	for (wearables_lists_map_t::const_iterator iter = mSelectedListsMap.begin();
			iter != mSelectedListsMap.end();
			++iter)
	{
		uuid_vec_t uuids;
		(*iter).second->getSelectedUUIDs(uuids);

		S32 prev_size = selected_uuids.size();
		selected_uuids.resize(prev_size + uuids.size());
		std::copy(uuids.begin(), uuids.end(), selected_uuids.begin() + prev_size);
	}
}

boost::signals2::connection LLOutfitsList::setSelectionChangeCallback(selection_change_callback_t cb)
{
	return mSelectionChangeSignal.connect(cb);
}

bool LLOutfitsList::hasItemSelected()
{
	return mItemSelected;
}

//////////////////////////////////////////////////////////////////////////
// Private methods
//////////////////////////////////////////////////////////////////////////
LLXMLNodePtr LLOutfitsList::getAccordionTabXMLNode()
{
	LLXMLNodePtr xmlNode = NULL;
	bool success = LLUICtrlFactory::getLayeredXMLNode("outfit_accordion_tab.xml", xmlNode);
	if (!success)
	{
		llwarns << "Failed to read xml of Outfit's Accordion Tab from outfit_accordion_tab.xml" << llendl;
		return NULL;
	}

	return xmlNode;
}

void LLOutfitsList::computeDifference(
	const LLInventoryModel::cat_array_t& vcats, 
	uuid_vec_t& vadded, 
	uuid_vec_t& vremoved)
{
	uuid_vec_t vnew;
	// Creating a vector of newly collected sub-categories UUIDs.
	for (LLInventoryModel::cat_array_t::const_iterator iter = vcats.begin();
		iter != vcats.end();
		iter++)
	{
		vnew.push_back((*iter)->getUUID());
	}

	uuid_vec_t vcur;
	// Creating a vector of currently displayed sub-categories UUIDs.
	for (outfits_map_t::const_iterator iter = mOutfitsMap.begin();
		iter != mOutfitsMap.end();
		iter++)
	{
		vcur.push_back((*iter).first);
	}

	LLCommonUtils::computeDifference(vnew, vcur, vadded, vremoved);
}

void LLOutfitsList::updateOutfitTab(const LLUUID& category_id)
{
	outfits_map_t::iterator outfits_iter = mOutfitsMap.find(category_id);
	if (outfits_iter != mOutfitsMap.end())
	{
		LLViewerInventoryCategory *cat = gInventory.getCategory(category_id);
		if (!cat) return;

		std::string name = cat->getName();

		// Update tab name with the new category name.
		LLAccordionCtrlTab* tab = outfits_iter->second;
		if (tab)
		{
			tab->setName(name);
			tab->setTitle(name);
		}
	}
}

void LLOutfitsList::resetItemSelection(LLWearableItemsList* list, const LLUUID& category_id)
{
	list->resetSelection();
	mItemSelected = false;
	setSelectedOutfitUUID(category_id);
}

void LLOutfitsList::changeOutfitSelection(LLWearableItemsList* list, const LLUUID& category_id)
{
	MASK mask = gKeyboard->currentMask(TRUE);

	// Reset selection in all previously selected tabs except for the current
	// if new selection is started.
	if (list && !(mask & MASK_CONTROL))
	{
		for (wearables_lists_map_t::iterator iter = mSelectedListsMap.begin();
				iter != mSelectedListsMap.end();
				++iter)
		{
			LLWearableItemsList* selected_list = (*iter).second;
			if (selected_list != list)
			{
				selected_list->resetSelection();
			}
		}

		// Clear current selection.
		mSelectedListsMap.clear();
	}

	mItemSelected = list && (list->getSelectedItem() != NULL);

	mSelectedListsMap.insert(wearables_lists_map_value_t(category_id, list));
	setSelectedOutfitUUID(category_id);
}

void LLOutfitsList::setSelectedOutfitUUID(const LLUUID& category_id)
{
	mSelectionChangeSignal(mSelectedOutfitUUID = category_id);
}

void LLOutfitsList::deselectOutfit(const LLUUID& category_id)
{
	// Remove selected lists map entry.
	mSelectedListsMap.erase(category_id);

	// Reset selection if the outfit is selected.
	if (category_id == mSelectedOutfitUUID)
	{
		setSelectedOutfitUUID(LLUUID::null);
	}
}

void LLOutfitsList::restoreOutfitSelection(LLAccordionCtrlTab* tab, const LLUUID& category_id)
{
	// Try restoring outfit selection after filtering.
	if (mAccordion->getSelectedTab() == tab)
	{
		setSelectedOutfitUUID(category_id);
	}
}

void LLOutfitsList::onFilteredWearableItemsListRefresh(LLUICtrl* ctrl)
{
	if (!ctrl || sFilterSubString.empty())
		return;

	for (outfits_map_t::iterator
			 iter = mOutfitsMap.begin(),
			 iter_end = mOutfitsMap.end();
		 iter != iter_end; ++iter)
	{
		LLAccordionCtrlTab* tab = iter->second;
		if (!tab) continue;

		LLWearableItemsList* list = dynamic_cast<LLWearableItemsList*>(tab->getAccordionView());
		if (list != ctrl) continue;

		applyFilterToTab(iter->first, tab, sFilterSubString);
	}
}

void LLOutfitsList::applyFilter(const std::string& new_filter_substring)
{
	mAccordion->setFilterSubString(new_filter_substring);

	for (outfits_map_t::iterator
			 iter = mOutfitsMap.begin(),
			 iter_end = mOutfitsMap.end();
		 iter != iter_end; ++iter)
	{
		LLAccordionCtrlTab* tab = iter->second;
		if (!tab) continue;

		bool more_restrictive = sFilterSubString.size() < new_filter_substring.size() && !new_filter_substring.substr(0, sFilterSubString.size()).compare(sFilterSubString);

		// Restore tab visibility in case of less restrictive filter
		// to compare it with updated string if it was previously hidden.
		if (!more_restrictive)
		{
			tab->setVisible(TRUE);
		}

		LLWearableItemsList* list = dynamic_cast<LLWearableItemsList*>(tab->getAccordionView());
		if (list)
		{
			list->setFilterSubString(new_filter_substring);
		}

		if(sFilterSubString.empty() && !new_filter_substring.empty())
		{
			//store accordion tab state when filter is not empty
			tab->notifyChildren(LLSD().with("action","store_state"));
		}

		if (!new_filter_substring.empty())
		{
			applyFilterToTab(iter->first, tab, new_filter_substring);
		}
		else
		{
			// restore tab title when filter is empty
			tab->setTitle(tab->getTitle());

			//restore accordion state after all those accodrion tab manipulations
			tab->notifyChildren(LLSD().with("action","restore_state"));

			// Try restoring the tab selection.
			restoreOutfitSelection(tab, iter->first);
		}
	}

	mAccordion->arrange();
}

void LLOutfitsList::applyFilterToTab(
	const LLUUID&		category_id,
	LLAccordionCtrlTab*	tab,
	const std::string&	filter_substring)
{
	if (!tab) return;
	LLWearableItemsList* list = dynamic_cast<LLWearableItemsList*>(tab->getAccordionView());
	if (!list) return;

	std::string title = tab->getTitle();
	LLStringUtil::toUpper(title);

	std::string cur_filter = filter_substring;
	LLStringUtil::toUpper(cur_filter);

	tab->setTitle(tab->getTitle(), cur_filter);

	if (std::string::npos == title.find(cur_filter))
	{
		// hide tab if its title doesn't pass filter
		// and it has no visible items
		tab->setVisible(list->hasMatchedItems());

		// remove title highlighting because it might
		// have been previously highlighted by less restrictive filter
		tab->setTitle(tab->getTitle());

		// Remove the tab from selection.
		deselectOutfit(category_id);
	}
	else
	{
		// Try restoring the tab selection.
		restoreOutfitSelection(tab, category_id);
	}

	if (tab->getVisible())
	{
		// Open tab if it has passed the filter.
		tab->setDisplayChildren(true);
	}
	else
	{
		// Set force refresh flag to refresh not visible list
		// when some changes occur in it.
		list->setForceRefresh(true);
	}
}

bool LLOutfitsList::canTakeOffSelected()
{
	uuid_vec_t selected_uuids;
	getSelectedItemsUUIDs(selected_uuids);

	LLFindWearablesEx is_worn(/*is_worn=*/ true, /*include_body_parts=*/ false);

	for (uuid_vec_t::const_iterator it=selected_uuids.begin(); it != selected_uuids.end(); ++it)
	{
		LLViewerInventoryItem* item = gInventory.getItem(*it);
		if (!item) continue;

		if (is_worn(NULL, item)) return true;
	}
	return false;
}

bool LLOutfitsList::canWearSelected()
{
	uuid_vec_t selected_items;
	getSelectedItemsUUIDs(selected_items);

	for (uuid_vec_t::const_iterator it = selected_items.begin(); it != selected_items.end(); ++it)
	{
		const LLUUID& id = *it;

		// Check whether the item is worn.
		if (!get_can_item_be_worn(id))
		{
			return false;
		}
	}

	// All selected items can be worn.
	return true;
}

void LLOutfitsList::onAccordionTabRightClick(LLUICtrl* ctrl, S32 x, S32 y, const LLUUID& cat_id)
{
	LLAccordionCtrlTab* tab = dynamic_cast<LLAccordionCtrlTab*>(ctrl);
	if(mOutfitMenu && is_tab_header_clicked(tab, y) && cat_id.notNull())
	{
		// Focus tab header to trigger tab selection change.
		LLUICtrl* header = tab->findChild<LLUICtrl>("dd_header");
		if (header)
		{
			header->setFocus(TRUE);
		}

		uuid_vec_t selected_uuids;
		selected_uuids.push_back(cat_id);
		mOutfitMenu->show(ctrl, selected_uuids, x, y);
	}
}

void LLOutfitsList::wearSelectedItems()
{
	uuid_vec_t selected_uuids;
	getSelectedItemsUUIDs(selected_uuids);

	if(selected_uuids.empty())
	{
		return;
	}

	wear_multiple(selected_uuids, false);
}

void LLOutfitsList::onWearableItemsListRightClick(LLUICtrl* ctrl, S32 x, S32 y)
{
	LLWearableItemsList* list = dynamic_cast<LLWearableItemsList*>(ctrl);
	if (!list) return;

	uuid_vec_t selected_uuids;

	getSelectedItemsUUIDs(selected_uuids);

	LLWearableItemsList::ContextMenu::instance().show(list, selected_uuids, x, y);
}

void LLOutfitsList::onCOFChanged()
{
	LLInventoryModel::changed_items_t changed_linked_items;

	const LLInventoryModel::changed_items_t& changed_items = gInventory.getChangedIDs();
	for (LLInventoryModel::changed_items_t::const_iterator iter = changed_items.begin();
		 iter != changed_items.end();
		 ++iter)
	{
		LLViewerInventoryItem* item = gInventory.getItem(*iter);
		if (item)
		{
			// From gInventory we get the UUIDs of new links added to COF
			// or removed from COF. These links UUIDs are not the same UUIDs
			// that we have in each wearable items list. So we collect base items
			// UUIDs to find all items or links that point to same base items in wearable
			// items lists and update their worn state there.
			changed_linked_items.insert(item->getLinkedUUID());
		}
	}

	for (outfits_map_t::iterator iter = mOutfitsMap.begin();
			iter != mOutfitsMap.end();
			++iter)
	{
		LLAccordionCtrlTab* tab = iter->second;
		if (!tab) continue;

		LLWearableItemsList* list = dynamic_cast<LLWearableItemsList*>(tab->getAccordionView());
		if (!list) continue;

		// Every list updates the labels of changed items  or
		// the links that point to these items.
		list->updateChangedItems(changed_linked_items);
	}
}

bool is_tab_header_clicked(LLAccordionCtrlTab* tab, S32 y)
{
	if(!tab || !tab->getHeaderVisible()) return false;

	S32 header_bottom = tab->getLocalRect().getHeight() - tab->getHeaderHeight();
	return y >= header_bottom;
}

// EOF