/**
 * @file llpanellandmarks.cpp
 * @brief Landmarks tab for Side Bar "Places" panel
 *
 * $LicenseInfo:firstyear=2009&license=viewerlgpl$
 * 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 "llpanellandmarks.h"

#include "llbutton.h"
#include "llfloaterprofile.h"
#include "llfloaterreg.h"
#include "llnotificationsutil.h"
#include "llsdutil.h"
#include "llsdutil_math.h"
#include "llregionhandle.h"

#include "llaccordionctrl.h"
#include "llagent.h"
#include "llagentpicksinfo.h"
#include "llagentui.h"
#include "llavataractions.h"
#include "llcallbacklist.h"
#include "llfloatersidepanelcontainer.h"
#include "llfloaterworldmap.h"
#include "llfolderviewitem.h"
#include "llinventorymodelbackgroundfetch.h"
#include "llinventorypanel.h"
#include "llinventoryfunctions.h"
#include "lllandmarkactions.h"
#include "llmenubutton.h"
#include "llplacesinventorybridge.h"
#include "llplacesinventorypanel.h"
#include "llplacesfolderview.h"
#include "lltoggleablemenu.h"
#include "llviewermenu.h"
#include "llviewerregion.h"
#include "fsfloaterplacedetails.h"
// [RLVa:KB]
#include "rlvactions.h"
#include "rlvhandler.h"
// [/RLVa:KB]

// Not yet implemented; need to remove buildPanel() from constructor when we switch
//static LLPanelInjector<LLLandmarksPanel> t_landmarks("panel_landmarks");

// helper functions
static void filter_list(LLPlacesInventoryPanel* inventory_list, const std::string& string);
static void collapse_all_folders(LLFolderView* root_folder);
static void expand_all_folders(LLFolderView* root_folder);
static bool has_expanded_folders(LLFolderView* root_folder);
static bool has_collapsed_folders(LLFolderView* root_folder);
static void toggle_restore_menu(LLMenuGL* menu, BOOL visible, BOOL enabled);
// <FS:Ansariel> FIRE-31051: Hide empty folders in Places floater when filtering
static bool category_has_descendents(LLPlacesInventoryPanel* inventory_list);

/**
 * Functor counting expanded and collapsed folders in folder view tree to know
 * when to enable or disable "Expand all folders" and "Collapse all folders" commands.
 */
class LLCheckFolderState : public LLFolderViewFunctor
{
public:
	LLCheckFolderState()
	:	mCollapsedFolders(0),
		mExpandedFolders(0)
	{}
	virtual ~LLCheckFolderState() {}
	virtual void doFolder(LLFolderViewFolder* folder);
	virtual void doItem(LLFolderViewItem* item) {}
	S32 getCollapsedFolders() { return mCollapsedFolders; }
	S32 getExpandedFolders() { return mExpandedFolders; }

private:
	S32 mCollapsedFolders;
	S32 mExpandedFolders;
};

// virtual
void LLCheckFolderState::doFolder(LLFolderViewFolder* folder)
{
	// Counting only folders that pass the filter.
	// The listener check allow us to avoid counting the folder view
	// object itself because it has no listener assigned.
	if (folder->getViewModelItem()->descendantsPassedFilter())
	{
		if (folder->isOpen())
		{
			++mExpandedFolders;
		}
		else
		{
			++mCollapsedFolders;
		}
	}
}

// Functor searching and opening a folder specified by UUID
// in a folder view tree.
class LLOpenFolderByID : public LLFolderViewFunctor
{
public:
	LLOpenFolderByID(const LLUUID& folder_id)
	:	mFolderID(folder_id)
	,	mIsFolderOpen(false)
	{}
	virtual ~LLOpenFolderByID() {}
	/*virtual*/ void doFolder(LLFolderViewFolder* folder);
	/*virtual*/ void doItem(LLFolderViewItem* item) {}

	bool isFolderOpen() { return mIsFolderOpen; }

private:
	bool	mIsFolderOpen;
	LLUUID	mFolderID;
};

// virtual
void LLOpenFolderByID::doFolder(LLFolderViewFolder* folder)
{
	if (folder->getViewModelItem() && static_cast<LLFolderViewModelItemInventory*>(folder->getViewModelItem())->getUUID() == mFolderID)
	{
		if (!folder->isOpen())
		{
			folder->setOpen(TRUE);
			mIsFolderOpen = true;
		}
	}
}

LLLandmarksPanel::LLLandmarksPanel()
	:	LLPanelPlacesTab()
	,	mLandmarksInventoryPanel(NULL)
	,	mCurrentSelectedList(NULL)
	,	mGearFolderMenu(NULL)
	,	mGearLandmarkMenu(NULL)
	,	mSortingMenu(NULL)
	,	mAddMenu(NULL)
	,	isLandmarksPanel(true)
{
	buildFromFile("panel_landmarks.xml");
}

LLLandmarksPanel::LLLandmarksPanel(bool is_landmark_panel)
	:	LLPanelPlacesTab()
	,	mLandmarksInventoryPanel(NULL)
	,	mCurrentSelectedList(NULL)
	,	mGearFolderMenu(NULL)
	,	mGearLandmarkMenu(NULL)
	,	mSortingMenu(NULL)
	,	mAddMenu(NULL)
	,	isLandmarksPanel(is_landmark_panel)
{
	if (is_landmark_panel)
	{
		buildFromFile("panel_landmarks.xml");
	}
}

LLLandmarksPanel::~LLLandmarksPanel()
{
}

BOOL LLLandmarksPanel::postBuild()
{
	if (!gInventory.isInventoryUsable())
		return FALSE;

	// mast be called before any other initXXX methods to init Gear menu
	initListCommandsHandlers();
	initLandmarksInventoryPanel();

	return TRUE;
}

// virtual
void LLLandmarksPanel::onSearchEdit(const std::string& string)
{
	filter_list(mCurrentSelectedList, string);

	if (sFilterSubString != string)
		sFilterSubString = string;

	// <FS:Ansariel> FIRE-31051: Hide empty folders in Places floater when filtering
	updateShowFolderState();
}

// virtual
void LLLandmarksPanel::onShowOnMap()
{
	if (NULL == mCurrentSelectedList)
	{
		LL_WARNS() << "There are no selected list. No actions are performed." << LL_ENDL;
		return;
	}

	// <FS:Ansariel> FIRE-31033: Keep Teleport/Map/Profile buttons on places floater
	// Disable the "Map" button because loading landmark can take some time.
	// During this time the button is useless. It will be enabled on callback finish
	// or upon switching to other item.
	mShowOnMapBtn->setEnabled(FALSE);
	// </FS:Ansariel>

	doActionOnCurSelectedLandmark(boost::bind(&LLLandmarksPanel::doShowOnMap, this, _1));
}

//virtual
void LLLandmarksPanel::onShowProfile()
{
	LLFolderViewModelItemInventory* cur_item = getCurSelectedViewModelItem();

	if(!cur_item)
		return;

	cur_item->performAction(mCurrentSelectedList->getModel(),"about");
}

// virtual
void LLLandmarksPanel::onTeleport()
{
	LLFolderViewModelItemInventory* view_model_item = getCurSelectedViewModelItem();
	if (view_model_item && view_model_item->getInventoryType() == LLInventoryType::IT_LANDMARK)
	{
		view_model_item->openItem();
	}
}

/*virtual*/
void LLLandmarksPanel::onRemoveSelected()
{
    onClipboardAction("delete");
}

// virtual
bool LLLandmarksPanel::isSingleItemSelected()
{
	bool result = false;

	if (mCurrentSelectedList != NULL)
	{
		LLFolderView* root_view = mCurrentSelectedList->getRootFolder();

		if (root_view->getSelectedCount() == 1)
		{
			result = isLandmarkSelected();
		}
	}

	return result;
}

// virtual
LLToggleableMenu* LLLandmarksPanel::getSelectionMenu()
{
    LLToggleableMenu* menu = mGearFolderMenu;

    if (mCurrentSelectedList)
    {
        LLFolderViewModelItemInventory* listenerp = getCurSelectedViewModelItem();
        if (!listenerp)
            return menu;

        if (listenerp->getInventoryType() == LLInventoryType::IT_LANDMARK)
        {
            menu = mGearLandmarkMenu;
        }
    }
    return menu;
}

// virtual
LLToggleableMenu* LLLandmarksPanel::getSortingMenu()
{
    return mSortingMenu;
}

// virtual
LLToggleableMenu* LLLandmarksPanel::getCreateMenu()
{
    return mAddMenu;
}

void LLLandmarksPanel::updateVerbs()
{
	if (sRemoveBtn)
	{
		sRemoveBtn->setEnabled(isActionEnabled("delete") && (isFolderSelected() || isLandmarkSelected()));
	}

	// <FS:Ansariel> FIRE-31033: Keep Teleport/Map/Profile buttons on places floater
	if (!isTabVisible())
		return;

	bool landmark_selected = isLandmarkSelected();
	mTeleportBtn->setEnabled(landmark_selected && isActionEnabled("teleport"));
	mShowProfile->setEnabled(landmark_selected && isActionEnabled("more_info"));
	mShowOnMapBtn->setEnabled(landmark_selected && isActionEnabled("show_on_map"));
	// </FS:Ansariel>
}

void LLLandmarksPanel::setItemSelected(const LLUUID& obj_id, BOOL take_keyboard_focus)
{
	if (!mCurrentSelectedList)
		return;

	LLFolderView* root = mCurrentSelectedList->getRootFolder();
	LLFolderViewItem* item = mCurrentSelectedList->getItemByID(obj_id);
	if (!item)
		return;
	root->setSelection(item, FALSE, take_keyboard_focus);
	root->scrollToShowSelection();
}

// <FS:Ansariel> FIRE-31051: Hide empty folders in Places floater when filtering
void LLLandmarksPanel::updateShowFolderState()
{
	if (!mLandmarksInventoryPanel)
	{
		return;
	}

	bool show_all_folders = mLandmarksInventoryPanel->getFilterSubString().empty();
	if (show_all_folders)
	{
		show_all_folders = category_has_descendents(mLandmarksInventoryPanel);
	}

	mLandmarksInventoryPanel->setShowFolderState(show_all_folders ?
		LLInventoryFilter::SHOW_ALL_FOLDERS :
		LLInventoryFilter::SHOW_NON_EMPTY_FOLDERS
	);
}
// </FS:Ansariel>

//////////////////////////////////////////////////////////////////////////
// PROTECTED METHODS
//////////////////////////////////////////////////////////////////////////

bool LLLandmarksPanel::isLandmarkSelected() const 
{
	LLFolderViewModelItemInventory* current_item = getCurSelectedViewModelItem();
	return current_item && (current_item->getInventoryType() == LLInventoryType::IT_LANDMARK);
}

bool LLLandmarksPanel::isFolderSelected() const
{
	LLFolderViewModelItemInventory* current_item = getCurSelectedViewModelItem();
	return current_item && (current_item->getInventoryType() == LLInventoryType::IT_CATEGORY);
}

void LLLandmarksPanel::doActionOnCurSelectedLandmark(LLLandmarkList::loaded_callback_t cb)
{
	LLFolderViewModelItemInventory* cur_item = getCurSelectedViewModelItem();
	if(cur_item && cur_item->getInventoryType() == LLInventoryType::IT_LANDMARK)
	{ 
		LLLandmark* landmark = LLLandmarkActions::getLandmark(cur_item->getUUID(), cb);
		if (landmark)
		{
			cb(landmark);
		}
	}
}

LLFolderViewItem* LLLandmarksPanel::getCurSelectedItem() const 
{
	return mCurrentSelectedList ?  mCurrentSelectedList->getRootFolder()->getCurSelectedItem() : NULL;
}

LLFolderViewModelItemInventory* LLLandmarksPanel::getCurSelectedViewModelItem() const
{
	LLFolderViewItem* cur_item = getCurSelectedItem();
	if (cur_item)
	{
		return 	static_cast<LLFolderViewModelItemInventory*>(cur_item->getViewModelItem());
	}
	return NULL;
}


void LLLandmarksPanel::updateSortOrder(LLInventoryPanel* panel, bool byDate)
{
	if(!panel) return; 

	U32 order = panel->getSortOrder();
	if (byDate)
	{
		panel->setSortOrder( order | LLInventoryFilter::SO_DATE );
	}
	else 
	{
		panel->setSortOrder( order & ~LLInventoryFilter::SO_DATE );
	}
}

void LLLandmarksPanel::resetSelection()
{
}

// virtual
void LLLandmarksPanel::processParcelInfo(const LLParcelData& parcel_data)
{
	//this function will be called after user will try to create a pick for selected landmark.
	// We have to make request to sever to get parcel_id and snaption_id. 
	if(mCreatePickItemId.notNull())
	{
		LLInventoryItem* inv_item = gInventory.getItem(mCreatePickItemId);

        if (inv_item && inv_item->getInventoryType() == LLInventoryType::IT_LANDMARK)
        {
            // we are processing response for doCreatePick, landmark should be already loaded
            LLLandmark* landmark = LLLandmarkActions::getLandmark(inv_item->getUUID());
            if (landmark)
            {
                doProcessParcelInfo(landmark, inv_item, parcel_data);
            }
        }
        mCreatePickItemId.setNull();
	}
}

// virtual
void LLLandmarksPanel::setParcelID(const LLUUID& parcel_id)
{
	if (!parcel_id.isNull())
	{
		LLRemoteParcelInfoProcessor::getInstance()->addObserver(parcel_id, this);
		LLRemoteParcelInfoProcessor::getInstance()->sendParcelInfoRequest(parcel_id);
	}
}

// virtual
void LLLandmarksPanel::setErrorStatus(S32 status, const std::string& reason)
{
	LL_WARNS() << "Can't handle remote parcel request."<< " Http Status: "<< status << ". Reason : "<< reason<<LL_ENDL;
}


//////////////////////////////////////////////////////////////////////////
// PRIVATE METHODS
//////////////////////////////////////////////////////////////////////////

void LLLandmarksPanel::initLandmarksInventoryPanel()
{
	mLandmarksInventoryPanel = getChild<LLPlacesInventoryPanel>("landmarks_list");

	initLandmarksPanel(mLandmarksInventoryPanel);

	mLandmarksInventoryPanel->setShowFolderState(LLInventoryFilter::SHOW_ALL_FOLDERS);

	// subscribe to have auto-rename functionality while creating New Folder
	mLandmarksInventoryPanel->setSelectCallback(boost::bind(&LLInventoryPanel::onSelectionChange, mLandmarksInventoryPanel, _1, _2));

	mCurrentSelectedList = mLandmarksInventoryPanel;
}

void LLLandmarksPanel::initLandmarksPanel(LLPlacesInventoryPanel* inventory_list)
{
	inventory_list->getFilter().setEmptyLookupMessage("PlacesNoMatchingItems");
	inventory_list->setFilterTypes(0x1 << LLInventoryType::IT_LANDMARK);
	inventory_list->setSelectCallback(boost::bind(&LLLandmarksPanel::updateVerbs, this));

	inventory_list->setShowFolderState(LLInventoryFilter::SHOW_NON_EMPTY_FOLDERS);
	bool sorting_order = gSavedSettings.getBOOL("LandmarksSortedByDate");
	updateSortOrder(inventory_list, sorting_order);

	LLPlacesFolderView* root_folder = dynamic_cast<LLPlacesFolderView*>(inventory_list->getRootFolder());
	if (root_folder)
	{
        if (mGearFolderMenu)
        {
            root_folder->setupMenuHandle(LLInventoryType::IT_CATEGORY, mGearFolderMenu->getHandle());
        }
        if (mGearLandmarkMenu)
        {
            root_folder->setupMenuHandle(LLInventoryType::IT_LANDMARK, mGearLandmarkMenu->getHandle());
        }

		root_folder->setParentLandmarksPanel(this);
	}

	inventory_list->saveFolderState();
}


// List Commands Handlers
void LLLandmarksPanel::initListCommandsHandlers()
{
	mCommitCallbackRegistrar.add("Places.LandmarksGear.Add.Action", boost::bind(&LLLandmarksPanel::onAddAction, this, _2));
	mCommitCallbackRegistrar.add("Places.LandmarksGear.CopyPaste.Action", boost::bind(&LLLandmarksPanel::onClipboardAction, this, _2));
	mCommitCallbackRegistrar.add("Places.LandmarksGear.Custom.Action", boost::bind(&LLLandmarksPanel::onCustomAction, this, _2));
	mCommitCallbackRegistrar.add("Places.LandmarksGear.Folding.Action", boost::bind(&LLLandmarksPanel::onFoldingAction, this, _2));
	mEnableCallbackRegistrar.add("Places.LandmarksGear.Check", boost::bind(&LLLandmarksPanel::isActionChecked, this, _2));
	mEnableCallbackRegistrar.add("Places.LandmarksGear.Enable", boost::bind(&LLLandmarksPanel::isActionEnabled, this, _2));
	mGearLandmarkMenu = LLUICtrlFactory::getInstance()->createFromFile<LLToggleableMenu>("menu_places_gear_landmark.xml", gMenuHolder, LLViewerMenuHolderGL::child_registry_t::instance());
	mGearFolderMenu = LLUICtrlFactory::getInstance()->createFromFile<LLToggleableMenu>("menu_places_gear_folder.xml", gMenuHolder, LLViewerMenuHolderGL::child_registry_t::instance());
	mSortingMenu = LLUICtrlFactory::getInstance()->createFromFile<LLToggleableMenu>("menu_places_gear_sorting.xml", gMenuHolder, LLViewerMenuHolderGL::child_registry_t::instance());
	mAddMenu = LLUICtrlFactory::getInstance()->createFromFile<LLToggleableMenu>("menu_place_add_button.xml", gMenuHolder, LLViewerMenuHolderGL::child_registry_t::instance());

    if (mGearLandmarkMenu)
    {
        mGearLandmarkMenu->setVisibilityChangeCallback(boost::bind(&LLLandmarksPanel::onMenuVisibilityChange, this, _1, _2));
        // show menus even if all items are disabled
        mGearLandmarkMenu->setAlwaysShowMenu(TRUE);
    } // Else corrupted files?

    if (mGearFolderMenu)
    {
        mGearFolderMenu->setVisibilityChangeCallback(boost::bind(&LLLandmarksPanel::onMenuVisibilityChange, this, _1, _2));
        mGearFolderMenu->setAlwaysShowMenu(TRUE);
    }

    if (mAddMenu)
    {
        mAddMenu->setAlwaysShowMenu(TRUE);
    }
}

void LLLandmarksPanel::updateMenuVisibility(LLUICtrl* menu)
{
	onMenuVisibilityChange(menu, LLSD().with("visibility", true));
}

void LLLandmarksPanel::onTrashButtonClick() const
{
	onClipboardAction("delete");
}

void LLLandmarksPanel::onAddAction(const LLSD& userdata) const
{
	LLFolderViewModelItemInventory* view_model = getCurSelectedViewModelItem();
	LLFolderViewItem* item = getCurSelectedItem();

	std::string command_name = userdata.asString();
	if("add_landmark" == command_name
        || "add_landmark_root" == command_name)
	{
// [RLVa:KB] - Checked: 2012-02-08 (RLVa-1.4.5) | Added: RLVa-1.4.5
		if (!gRlvHandler.hasBehaviour(RLV_BHVR_SHOWLOC))
		{
// [/RLVa:KB]
			LLViewerInventoryItem* landmark = LLLandmarkActions::findLandmarkForAgentPos();
			if(landmark)
			{
				LLNotificationsUtil::add("LandmarkAlreadyExists");
			}
			else
			{
                LLSD args;
                args["type"] = "create_landmark";
                if ("add_landmark" == command_name
                    && view_model->getInventoryType() == LLInventoryType::IT_CATEGORY)
                {
                    args["dest_folder"] = view_model->getUUID();
                }
                if ("add_landmark_root" == command_name
                    && mCurrentSelectedList == mLandmarksInventoryPanel)
                {
                    args["dest_folder"] = mLandmarksInventoryPanel->getRootFolderID();
                }
                // else will end up in favorites
				LLFloaterReg::showInstance("add_landmark", args);
			}
// [RLVa:KB] - Checked: 2012-02-08 (RLVa-1.4.5) | Added: RLVa-1.4.5
		}
// [/RLVa:KB]
	} 
	else if ("category" == command_name)
	{
		if (item && mCurrentSelectedList == mLandmarksInventoryPanel)
		{
			LLFolderViewModelItem* folder_bridge = NULL;

			if (view_model->getInventoryType()
					== LLInventoryType::IT_LANDMARK)
			{
				// for a landmark get parent folder bridge
				folder_bridge = item->getParentFolder()->getViewModelItem();
			}
			else if (view_model->getInventoryType()
					== LLInventoryType::IT_CATEGORY)
			{
				// for a folder get its own bridge
				folder_bridge = view_model;
			}

			menu_create_inventory_item(mCurrentSelectedList,
					dynamic_cast<LLFolderBridge*> (folder_bridge), LLSD(
							"category"), gInventory.findCategoryUUIDForType(
							LLFolderType::FT_LANDMARK));
		}
		else
		{
			//in case My Landmarks tab is completely empty (thus cannot be determined as being selected)
			menu_create_inventory_item(mLandmarksInventoryPanel, NULL,  LLSD("category"), 
				gInventory.findCategoryUUIDForType(LLFolderType::FT_LANDMARK));
		}
	}
    else if ("category_root" == command_name)
    {
        //in case My Landmarks tab is completely empty (thus cannot be determined as being selected)
        menu_create_inventory_item(mLandmarksInventoryPanel, NULL, LLSD("category"),
            gInventory.findCategoryUUIDForType(LLFolderType::FT_LANDMARK));
    }
}

void LLLandmarksPanel::onClipboardAction(const LLSD& userdata) const
{
	if(!mCurrentSelectedList) 
		return;
	std::string command_name = userdata.asString();
    if("copy_slurl" == command_name)
	{
    	LLFolderViewModelItemInventory* cur_item = getCurSelectedViewModelItem();
		if(cur_item)
			LLLandmarkActions::copySLURLtoClipboard(cur_item->getUUID());
	}
	else if ( "paste" == command_name)
	{
		mCurrentSelectedList->getRootFolder()->paste();
	} 
	else if ( "cut" == command_name)
	{
		mCurrentSelectedList->getRootFolder()->cut();
	}
	else
	{
		mCurrentSelectedList->doToSelected(command_name);
	}
}

void LLLandmarksPanel::onFoldingAction(const LLSD& userdata)
{
	std::string command_name = userdata.asString();

	if ("expand_all" == command_name)
	{
		expand_all_folders(mCurrentSelectedList->getRootFolder());
	}
	else if ("collapse_all" == command_name)
	{
		collapse_all_folders(mCurrentSelectedList->getRootFolder());
	}
	else if ("sort_by_date" == command_name)
	{
		bool sorting_order = gSavedSettings.getBOOL("LandmarksSortedByDate");
		sorting_order=!sorting_order;
		gSavedSettings.setBOOL("LandmarksSortedByDate",sorting_order);
		updateSortOrder(mLandmarksInventoryPanel, sorting_order);
	}
	else
	{
		if(mCurrentSelectedList)
		{
			mCurrentSelectedList->doToSelected(userdata);
		}
	}
}

bool LLLandmarksPanel::isActionChecked(const LLSD& userdata) const
{
	const std::string command_name = userdata.asString();

	if ( "sort_by_date" == command_name)
	{
		bool sorting_order = gSavedSettings.getBOOL("LandmarksSortedByDate");
		return  sorting_order;
	}

	return false;
}

bool LLLandmarksPanel::isActionEnabled(const LLSD& userdata) const
{
	std::string command_name = userdata.asString();

	LLFolderView* root_folder_view = mCurrentSelectedList 
		? mCurrentSelectedList->getRootFolder() 
		: NULL;

	bool is_single_selection = root_folder_view && root_folder_view->getSelectedCount() == 1;

	if ("collapse_all" == command_name)
	{
		return has_expanded_folders(mCurrentSelectedList->getRootFolder());
	}
	else if ("expand_all" == command_name)
	{
		return has_collapsed_folders(mCurrentSelectedList->getRootFolder());
	}
	else if ("sort_by_date"	== command_name)
	{
		// disable "sort_by_date" for Favorites tab because
		// it has its own items order. EXT-1758
		if (!isLandmarksPanel)
		{
			return false;
		}
	}
	else if (  "paste"		== command_name
			|| "cut"		== command_name
			|| "copy"		== command_name
			|| "delete"		== command_name
			|| "collapse"	== command_name
			|| "expand"		== command_name
			)
	{
		if (!root_folder_view) return false;

		std::set<LLFolderViewItem*> selected_uuids =    root_folder_view->getSelectionList();

		if (selected_uuids.empty())
		{
			return false;
		}
		
		// Allow to execute the command only if it can be applied to all selected items.
		for (std::set<LLFolderViewItem*>::const_iterator iter =    selected_uuids.begin(); iter != selected_uuids.end(); ++iter)
		{
			LLFolderViewItem* item = *iter;

			if (!item) return false;

			if (!canItemBeModified(command_name, item)) return false;
		}

		return true;
	}
	else if (  "teleport"		== command_name
			|| "more_info"		== command_name
			|| "show_on_map"	== command_name
			|| "copy_slurl"		== command_name
			|| "rename"			== command_name
			)
	{
		// disable some commands for multi-selection. EXT-1757
		if (!is_single_selection)
		{
			return false;
		}

		if ("show_on_map" == command_name)
		{
			LLFolderViewModelItemInventory* cur_item = getCurSelectedViewModelItem();
			if (!cur_item) return false;

			LLViewerInventoryItem* inv_item = dynamic_cast<LLViewerInventoryItem*>(cur_item->getInventoryObject());
			if (!inv_item) return false;

			LLUUID asset_uuid = inv_item->getAssetUUID();
			if (asset_uuid.isNull()) return false;

			// Disable "Show on Map" if landmark loading is in progress.
			// <FS:Ansariel> RLVa fix
			//return !gLandmarkList.isAssetInLoadedCallbackMap(asset_uuid);
			return !gLandmarkList.isAssetInLoadedCallbackMap(asset_uuid) && !gRlvHandler.hasBehaviour(RLV_BHVR_SHOWWORLDMAP);
		}
		else if ("rename" == command_name)
		{
			LLFolderViewItem* selected_item = getCurSelectedItem();
			if (!selected_item) return false;

			return canItemBeModified(command_name, selected_item);
		}
		// <FS:Ansariel> RLVa fix
		else if ("teleport" == command_name)
		{
			return !gRlvHandler.hasBehaviour(RLV_BHVR_TPLM);
		}
		// </FS:Ansariel>

		return true;
	}
    if ("category_root" == command_name || "category" == command_name)
    {
		// we can add folder only in Landmarks tab
		return isLandmarksPanel;
	}
	else if("create_pick" == command_name)
	{
		if (mCurrentSelectedList)
		{
			std::set<LLFolderViewItem*> selection =    mCurrentSelectedList->getRootFolder()->getSelectionList();
			if (!selection.empty())
			{
				return ( 1 == selection.size() && !LLAgentPicksInfo::getInstance()->isPickLimitReached() );
			}
		}
		return false;
	}
    else if ("add_landmark" == command_name)
    {
// [RLVa:KB] - Checked: 2012-02-08 (RLVa-1.4.5) | Added: RLVa-1.4.5
		if (gRlvHandler.hasBehaviour(RLV_BHVR_SHOWLOC))
		{
			return false;
		}
// [/RLVa:KB]

        if (!is_single_selection)
        {
            return false;
        }

        LLFolderViewModelItemInventory* view_model = getCurSelectedViewModelItem();
        if (!view_model || view_model->getInventoryType() != LLInventoryType::IT_CATEGORY)
        {
            return false;
        }
        LLViewerInventoryItem* landmark = LLLandmarkActions::findLandmarkForAgentPos();
        if (landmark)
        {
            //already exists
            return false;
        }
        return true;
    }
    else if ("add_landmark_root" == command_name)
    {
// [RLVa:KB] - Checked: 2012-02-08 (RLVa-1.4.5) | Added: RLVa-1.4.5
		if (gRlvHandler.hasBehaviour(RLV_BHVR_SHOWLOC))
		{
			return false;
		}
// [/RLVa:KB]

        LLViewerInventoryItem* landmark = LLLandmarkActions::findLandmarkForAgentPos();
        if (landmark)
        {
            //already exists
            return false;
        }
        return true;
    }
    else if ("share" == command_name)
    {
        if (!mCurrentSelectedList)
        {
            return false;
        }
        if (!LLAvatarActions::canShareSelectedItems(mCurrentSelectedList))
        {
            return false;
        }
        return true;
    }
	else if (command_name == "move_to_landmarks" || command_name == "move_to_favorites")
	{
		LLFolderViewModelItemInventory* cur_item_model = getCurSelectedViewModelItem();
		if (cur_item_model)
		{
			LLFolderType::EType folder_type = command_name == "move_to_landmarks" ? LLFolderType::FT_FAVORITE : LLFolderType::FT_LANDMARK;
			if (!gInventory.isObjectDescendentOf(cur_item_model->getUUID(), gInventory.findCategoryUUIDForType(folder_type)))
			{
				return false;
			}

			if (root_folder_view)
			{
				std::set<LLFolderViewItem*> selected_uuids = root_folder_view->getSelectionList();
				for (std::set<LLFolderViewItem*>::const_iterator iter = selected_uuids.begin(); iter != selected_uuids.end(); ++iter)
				{
					LLFolderViewItem* item = *iter;
					if (!item) return false;

					cur_item_model = static_cast<LLFolderViewModelItemInventory*>(item->getViewModelItem());
					if (!cur_item_model || cur_item_model->getInventoryType() != LLInventoryType::IT_LANDMARK)
					{
						return false;
					}
				}
				return true;
			}
		}
		return false;
	}
	else
	{
		LL_WARNS() << "Unprocessed command has come: " << command_name << LL_ENDL;
	}

	return true;
}

void LLLandmarksPanel::onCustomAction(const LLSD& userdata)
{
	std::string command_name = userdata.asString();
	if("more_info" == command_name)
	{
		onShowProfile();
	}
	else if ("teleport" == command_name)
	{
		onTeleport();
	}
	else if ("show_on_map" == command_name)
	{
		onShowOnMap();
	}
	else if ("create_pick" == command_name)
	{
        LLFolderViewModelItemInventory* cur_item = getCurSelectedViewModelItem();
        if (cur_item)
        {
            doActionOnCurSelectedLandmark(boost::bind(&LLLandmarksPanel::doCreatePick, this, _1, cur_item->getUUID()));
        }
	}
    else if ("share" == command_name && mCurrentSelectedList)
    {
        LLAvatarActions::shareWithAvatars(mCurrentSelectedList);
    }
	else if ("restore" == command_name && mCurrentSelectedList)
	{
		mCurrentSelectedList->doToSelected(userdata);
	}
	else if (command_name == "move_to_landmarks" || command_name == "move_to_favorites")
	{
		LLFolderView* root_folder_view = mCurrentSelectedList ? mCurrentSelectedList->getRootFolder() : NULL;
		if (root_folder_view)
		{
			LLFolderType::EType folder_type = command_name == "move_to_landmarks" ? LLFolderType::FT_LANDMARK : LLFolderType::FT_FAVORITE;
			std::set<LLFolderViewItem*> selected_uuids = root_folder_view->getSelectionList();
			for (std::set<LLFolderViewItem*>::const_iterator iter = selected_uuids.begin(); iter != selected_uuids.end(); ++iter)
			{
				LLFolderViewItem* item = *iter;
				if (item)
				{
					LLFolderViewModelItemInventory* item_model = static_cast<LLFolderViewModelItemInventory*>(item->getViewModelItem());
					if (item_model)
					{
						change_item_parent(item_model->getUUID(), gInventory.findCategoryUUIDForType(folder_type));
					}
				}
			}
		}

	}
}

void LLLandmarksPanel::onMenuVisibilityChange(LLUICtrl* ctrl, const LLSD& param)
{
	bool new_visibility = param["visibility"].asBoolean();

	// We don't have to update items visibility if the menu is hiding.
	if (!new_visibility) return;

	BOOL are_any_items_in_trash = FALSE;
	BOOL are_all_items_in_trash = TRUE;

	LLFolderView* root_folder_view = mCurrentSelectedList ? mCurrentSelectedList->getRootFolder() : NULL;
	if(root_folder_view)
	{
		const LLUUID trash_id = gInventory.findCategoryUUIDForType(LLFolderType::FT_TRASH);

		std::set<LLFolderViewItem*> selected_items =    root_folder_view->getSelectionList();

		// Iterate through selected items to find out if any of these items are in Trash
		// or all the items are in Trash category.
		for (std::set<LLFolderViewItem*>::const_iterator iter =    selected_items.begin(); iter != selected_items.end(); ++iter)
		{
			LLFolderViewItem* item = *iter;

			// If no item is found it might be a folder id.
			if (!item) continue;

			LLFolderViewModelItemInventory* listenerp = static_cast<LLFolderViewModelItemInventory*>(item->getViewModelItem());
			if(!listenerp) continue;

			// Trash category itself should not be included because it can't be
			// actually restored from trash.
			are_all_items_in_trash &= listenerp->isItemInTrash() &&    listenerp->getUUID() != trash_id;

			// If there are any selected items in Trash including the Trash category itself
			// we show "Restore Item" in context menu and hide other irrelevant items.
			are_any_items_in_trash |= listenerp->isItemInTrash();
		}
	}

	// Display "Restore Item" menu entry if at least one of the selected items
	// is in Trash or the Trash category itself is among selected items.
	// Hide other menu entries in this case.
	// Enable this menu entry only if all selected items are in the Trash category.
	toggle_restore_menu((LLMenuGL*)ctrl, are_any_items_in_trash, are_all_items_in_trash);
}

/*
Processes such actions: cut/rename/delete/paste actions

Rules:
 1. We can't perform any action in Library
 2. For Landmarks we can:
	- cut/rename/delete in any other accordions
	- paste - only in Favorites, Landmarks accordions
 3. For Folders we can: perform any action in Landmarks accordion, except Received folder
 4. We can paste folders from Clipboard (processed by LLFolderView::canPaste())
 5. Check LLFolderView/Inventory Bridges rules
 */
bool LLLandmarksPanel::canItemBeModified(const std::string& command_name, LLFolderViewItem* item) const
{
	// validate own rules first

	if (!item) return false;

	bool can_be_modified = false;

	// landmarks can be modified in any other accordion...
	if (static_cast<LLFolderViewModelItemInventory*>(item->getViewModelItem())->getInventoryType() == LLInventoryType::IT_LANDMARK)
	{
		can_be_modified = true;
	}
	else
	{
		// ...folders only in the Landmarks accordion...
		can_be_modified = isLandmarksPanel;
	}

	// then ask LLFolderView permissions

	LLFolderView* root_folder = mCurrentSelectedList->getRootFolder();

	if ("copy" == command_name)
	{
		// we shouldn't be able to copy folders from My Inventory Panel
		return can_be_modified && root_folder->canCopy();
	}
	else if ("collapse" == command_name)
	{
		return item->isOpen();
	}
	else if ("expand" == command_name)
	{
		return !item->isOpen();
	}

	if (can_be_modified)
	{
		LLFolderViewModelItemInventory* listenerp = static_cast<LLFolderViewModelItemInventory*>(item->getViewModelItem());

		if ("cut" == command_name)
		{
			can_be_modified = root_folder->canCut();
		}
		else if ("rename" == command_name)
		{
			can_be_modified = listenerp ? listenerp->isItemRenameable() : false;
		}
		else if ("delete" == command_name)
		{
			can_be_modified = listenerp ? listenerp->isItemRemovable() && !listenerp->isItemInTrash() : false;
		}
		else if("paste" == command_name)
		{
			can_be_modified = root_folder->canPaste();
		}
		else
		{
			LL_WARNS() << "Unprocessed command has come: " << command_name << LL_ENDL;
		}
	}

	return can_be_modified;
}

bool LLLandmarksPanel::handleDragAndDropToTrash(BOOL drop, EDragAndDropType cargo_type, void* cargo_data , EAcceptance* accept)
{
	*accept = ACCEPT_NO;

	switch (cargo_type)
	{

	case DAD_LANDMARK:
	case DAD_CATEGORY:
		{
			bool is_enabled = isActionEnabled("delete");

			if (is_enabled) *accept = ACCEPT_YES_MULTI;

			if (is_enabled && drop)
			{
				// don't call onClipboardAction("delete")
				// this lead to removing (N * 2 - 1) items if drag N>1 items into trash. EXT-6757
				// So, let remove items one by one.
				LLInventoryItem* item = static_cast<LLInventoryItem*>(cargo_data);
				if (item)
				{
					LLFolderViewItem* fv_item = mCurrentSelectedList
						? mCurrentSelectedList->getItemByID(item->getUUID())
						: NULL;

					if (fv_item)
					{
						// is Item Removable checked inside of remove()
						fv_item->remove();
					}
				}
			}
		}
		break;
	default:
		break;
	}

	updateVerbs();
	return true;
}

void LLLandmarksPanel::doShowOnMap(LLLandmark* landmark)
{
	LLVector3d landmark_global_pos;
	if (!landmark->getGlobalPos(landmark_global_pos))
		return;

	LLFloaterWorldMap* worldmap_instance = LLFloaterWorldMap::getInstance();
	if (!landmark_global_pos.isExactlyZero() && worldmap_instance)
	{
		worldmap_instance->trackLocation(landmark_global_pos);
		LLFloaterReg::showInstance("world_map", "center");
	}

	mShowOnMapBtn->setEnabled(TRUE); // <FS:Ansariel> FIRE-31033: Keep Teleport/Map/Profile buttons on places floater
    if (mGearLandmarkMenu)
    {
        mGearLandmarkMenu->setItemEnabled("show_on_map", TRUE);
    }
}

void LLLandmarksPanel::doProcessParcelInfo(LLLandmark* landmark,
										   LLInventoryItem* inv_item,
										   const LLParcelData& parcel_data)
{
	LLVector3d landmark_global_pos;
	landmark->getGlobalPos(landmark_global_pos);

	LLPickData data;
	data.pos_global = landmark_global_pos;
	data.name = inv_item->getName();
	data.desc = inv_item->getDescription();
	data.snapshot_id = parcel_data.snapshot_id;
	data.parcel_id = parcel_data.parcel_id;

    LLFloaterProfile* profile_floater = dynamic_cast<LLFloaterProfile*>(LLFloaterReg::showInstance("profile", LLSD().with("id", gAgentID)));
    if (profile_floater)
    {
        profile_floater->createPick(data);
    }
}

void LLLandmarksPanel::doCreatePick(LLLandmark* landmark, const LLUUID &item_id)
{
	LLViewerRegion* region = gAgent.getRegion();
	if (!region) return;

    mCreatePickItemId = item_id;

	LLGlobalVec pos_global;
	LLUUID region_id;
	landmark->getGlobalPos(pos_global);
	landmark->getRegionID(region_id);
	LLVector3 region_pos((F32)fmod(pos_global.mdV[VX], (F64)REGION_WIDTH_METERS),
					  (F32)fmod(pos_global.mdV[VY], (F64)REGION_WIDTH_METERS),
					  (F32)pos_global.mdV[VZ]);

	LLSD body;
	std::string url = region->getCapability("RemoteParcelRequest");
	if (!url.empty())
	{
        LLRemoteParcelInfoProcessor::getInstance()->requestRegionParcelInfo(url,
            region_id, region_pos, pos_global, getObserverHandle());
	}
	else
	{
		LL_WARNS() << "Can't create pick for landmark for region" << region_id
				<< ". Region: "	<< region->getName()
				<< " does not support RemoteParcelRequest" << LL_ENDL;
	}
}

//////////////////////////////////////////////////////////////////////////
// HELPER FUNCTIONS
//////////////////////////////////////////////////////////////////////////
static void filter_list(LLPlacesInventoryPanel* inventory_list, const std::string& string)
{
	// When search is cleared, restore the old folder state.
	if (!inventory_list->getFilterSubString().empty() && string == "")
	{
		inventory_list->setFilterSubString(LLStringUtil::null);
		// Re-open folders that were open before
		inventory_list->restoreFolderState();
	}

	if (inventory_list->getFilterSubString().empty() && string.empty())
	{
		// current filter and new filter empty, do nothing
		return;
	}

	// save current folder open state if no filter currently applied
	if (inventory_list->getFilterSubString().empty())
	{
		inventory_list->saveFolderState();
	}

	// Set new filter string
	inventory_list->setFilterSubString(string);
}

static void collapse_all_folders(LLFolderView* root_folder)
{
	if (!root_folder)
		return;

	root_folder->setOpenArrangeRecursively(FALSE, LLFolderViewFolder::RECURSE_DOWN);
	root_folder->arrangeAll();
}

static void expand_all_folders(LLFolderView* root_folder)
{
	if (!root_folder)
		return;

	root_folder->setOpenArrangeRecursively(TRUE, LLFolderViewFolder::RECURSE_DOWN);
	root_folder->arrangeAll();
}

static bool has_expanded_folders(LLFolderView* root_folder)
{
	LLCheckFolderState checker;
	root_folder->applyFunctorRecursively(checker);

	// We assume that the root folder is always expanded so we enable "collapse_all"
	// command when we have at least one more expanded folder.
	if (checker.getExpandedFolders() < 2)
	{
		return false;
	}

	return true;
}

static bool has_collapsed_folders(LLFolderView* root_folder)
{
	LLCheckFolderState checker;
	root_folder->applyFunctorRecursively(checker);

	if (checker.getCollapsedFolders() < 1)
	{
		return false;
	}

	return true;
}

// Displays "Restore Item" context menu entry while hiding
// all other entries or vice versa.
// Sets "Restore Item" enabled state.
void toggle_restore_menu(LLMenuGL *menu, BOOL visible, BOOL enabled)
{
	if (!menu) return;

	const LLView::child_list_t *list = menu->getChildList();
	for (LLView::child_list_t::const_iterator itor = list->begin();
		 itor != list->end();
		 ++itor)
	{
		LLView *menu_item = (*itor);
		std::string name = menu_item->getName();

		if ("restore_item" == name)
		{
			menu_item->setVisible(visible);
			menu_item->setEnabled(enabled);
		}
		else
		{
			menu_item->setVisible(!visible);
		}
	}
}

// <FS:Ansariel> FIRE-31051: Hide empty folders in Places floater when filtering
static bool category_has_descendents(LLPlacesInventoryPanel* inventory_list)
{
	LLViewerInventoryCategory* category = gInventory.getCategory(inventory_list->getRootFolderID());
	if (category)
	{
		return category->getDescendentCount() > 0;
	}

	return false;
}
// </FS:Ansariel>

LLFavoritesPanel::LLFavoritesPanel()
	:	LLLandmarksPanel(false)
{
	buildFromFile("panel_favorites.xml");
}

BOOL LLFavoritesPanel::postBuild()
{
	if (!gInventory.isInventoryUsable())
		return FALSE;

	// mast be called before any other initXXX methods to init Gear menu
	LLLandmarksPanel::initListCommandsHandlers();

	initFavoritesInventoryPanel();

	return TRUE;
}

void LLFavoritesPanel::initFavoritesInventoryPanel()
{
	mCurrentSelectedList = getChild<LLPlacesInventoryPanel>("favorites_list");

	LLLandmarksPanel::initLandmarksPanel(mCurrentSelectedList);
	mCurrentSelectedList->getFilter().setEmptyLookupMessage("FavoritesNoMatchingItems");
}
// EOF
