path: root/indra/newview/llviewerparcelmgr.cpp

/**
 * @file llviewerparcelmgr.cpp
 * @brief Viewer-side representation of owned land
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * 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 "llviewerparcelmgr.h"

// Library includes
#include "llaudioengine.h"
#include "indra_constants.h"
#include "llcachename.h"
#include "llgl.h"
#include "llnotifications.h"
#include "llnotificationsutil.h"
#include "llparcel.h"
#include "message.h"
#include "llfloaterreg.h"

// Viewer includes
#include "llagent.h"
#include "llagentaccess.h"
#include "llviewerparcelaskplay.h"
#include "llviewerwindow.h"
#include "llviewercontrol.h"
//#include "llfirstuse.h"
#include "llfloaterbuyland.h"
#include "llfloatergroups.h"
#include "llpanelnearbymedia.h"
#include "llfloatersellland.h"
#include "llfloatertools.h"
#include "llparcelselection.h"
#include "llresmgr.h"
#include "llsdutil.h"
#include "llsdutil_math.h"
#include "llslurl.h"
#include "llstatusbar.h"
#include "llui.h"
#include "llviewertexture.h"
#include "llviewertexturelist.h"
#include "llviewermenu.h"
#include "llviewerparcelmedia.h"
#include "llviewerparceloverlay.h"
#include "llviewerregion.h"
#include "llworld.h"
#include "roles_constants.h"
#include "llweb.h"
#include "llvieweraudio.h"
#include "llcorehttputil.h"

#include "llenvironment.h"

const F32 PARCEL_BAN_LINES_DRAW_SECS_ON_COLLISION = 10.f;
const F32 PARCEL_COLLISION_DRAW_SECS_ON_PROXIMITY = 1.f;


// Globals

U8* LLViewerParcelMgr::sPackedOverlay = NULL;
S32 LLViewerParcelMgr::PARCEL_BAN_LINES_HIDE = 0;
S32 LLViewerParcelMgr::PARCEL_BAN_LINES_ON_COLLISION = 1;
S32 LLViewerParcelMgr::PARCEL_BAN_LINES_ON_PROXIMITY = 2;

LLUUID gCurrentMovieID = LLUUID::null;

LLPointer<LLViewerTexture> sBlockedImage;
LLPointer<LLViewerTexture> sPassImage;

// Local functions
void callback_start_music(S32 option, void* data);
void optionally_prepare_video(const LLParcel *parcelp);
void callback_prepare_video(S32 option, void* data);
void prepare_video(const LLParcel *parcelp);
void start_video(const LLParcel *parcelp);
void stop_video();
bool callback_god_force_owner(const LLSD&, const LLSD&);

struct LLGodForceOwnerData
{
    LLUUID mOwnerID;
    S32 mLocalID;
    LLHost mHost;

    LLGodForceOwnerData(
        const LLUUID& owner_id,
        S32 local_parcel_id,
        const LLHost& host) :
        mOwnerID(owner_id),
        mLocalID(local_parcel_id),
        mHost(host) {}
};

//
// Methods
//
LLViewerParcelMgr::LLViewerParcelMgr()
:   mSelected(false),
    mRequestResult(0),
    mWestSouth(),
    mEastNorth(),
    mSelectedDwell(DWELL_NAN),
    mAgentParcelSequenceID(-1),
    mHoverRequestResult(0),
    mHoverWestSouth(),
    mHoverEastNorth(),
    mTeleportInProgressPosition(),
    mRenderCollision(false),
    mRenderSelection(true),
    mCollisionBanned(0),
    mCollisionTimer(),
    mMediaParcelId(0),
    mMediaRegionId(0)
{
    mCurrentParcel = new LLParcel();
    mCurrentParcelSelection = new LLParcelSelection(mCurrentParcel);
    mFloatingParcelSelection = new LLParcelSelection(mCurrentParcel);

    mAgentParcel = new LLParcel();
    mHoverParcel = new LLParcel();
    mCollisionParcel = new LLParcel();

    mParcelsPerEdge = S32(  REGION_WIDTH_METERS / PARCEL_GRID_STEP_METERS );
    mHighlightSegments = new U8[(mParcelsPerEdge+1)*(mParcelsPerEdge+1)];
    resetSegments(mHighlightSegments);

    mCollisionSegments = new U8[(mParcelsPerEdge+1)*(mParcelsPerEdge+1)];
    resetSegments(mCollisionSegments);

    // JC: Resolved a merge conflict here, eliminated
    // mBlockedImage->setAddressMode(LLTexUnit::TAM_WRAP);
    // because it is done in llviewertexturelist.cpp
    mBlockedImage = LLViewerTextureManager::getFetchedTextureFromFile("world/NoEntryLines.png", FTT_LOCAL_FILE, true, LLGLTexture::BOOST_UI);
    mPassImage = LLViewerTextureManager::getFetchedTextureFromFile("world/NoEntryPassLines.png", FTT_LOCAL_FILE, true, LLGLTexture::BOOST_UI);

    S32 overlay_size = mParcelsPerEdge * mParcelsPerEdge / PARCEL_OVERLAY_CHUNKS;
    sPackedOverlay = new U8[overlay_size];

    mAgentParcelOverlay = new U8[mParcelsPerEdge * mParcelsPerEdge];
    S32 i;
    for (i = 0; i < mParcelsPerEdge * mParcelsPerEdge; i++)
    {
        mAgentParcelOverlay[i] = 0;
    }

    mTeleportInProgress = true; // the initial parcel update is treated like teleport
}


LLViewerParcelMgr::~LLViewerParcelMgr()
{
    mCurrentParcelSelection->setParcel(NULL);
    mCurrentParcelSelection = NULL;

    mFloatingParcelSelection->setParcel(NULL);
    mFloatingParcelSelection = NULL;

    delete mCurrentParcel;
    mCurrentParcel = NULL;

    delete mAgentParcel;
    mAgentParcel = NULL;

    delete mCollisionParcel;
    mCollisionParcel = NULL;

    delete mHoverParcel;
    mHoverParcel = NULL;

    delete[] mHighlightSegments;
    mHighlightSegments = NULL;

    delete[] mCollisionSegments;
    mCollisionSegments = NULL;

    delete[] sPackedOverlay;
    sPackedOverlay = NULL;

    delete[] mAgentParcelOverlay;
    mAgentParcelOverlay = NULL;

    sBlockedImage = NULL;
    sPassImage = NULL;
}

void LLViewerParcelMgr::dump()
{
    LL_INFOS() << "Parcel Manager Dump" << LL_ENDL;
    LL_INFOS() << "mSelected " << S32(mSelected) << LL_ENDL;
    LL_INFOS() << "Selected parcel: " << LL_ENDL;
    LL_INFOS() << mWestSouth << " to " << mEastNorth << LL_ENDL;
    mCurrentParcel->dump();
    LL_INFOS() << "banning " << mCurrentParcel->mBanList.size() << LL_ENDL;

    LLAccessEntry::map::const_iterator cit = mCurrentParcel->mBanList.begin();
    LLAccessEntry::map::const_iterator end = mCurrentParcel->mBanList.end();
    for ( ; cit != end; ++cit)
    {
        LL_INFOS() << "ban id " << (*cit).first << LL_ENDL;
    }
    LL_INFOS() << "Hover parcel:" << LL_ENDL;
    mHoverParcel->dump();
    LL_INFOS() << "Agent parcel:" << LL_ENDL;
    mAgentParcel->dump();
}


LLViewerRegion* LLViewerParcelMgr::getSelectionRegion()
{
    return LLWorld::getInstance()->getRegionFromPosGlobal( mWestSouth );
}


void LLViewerParcelMgr::getDisplayInfo(S32* area_out, S32* claim_out,
                                       S32* rent_out,
                                       bool* for_sale_out,
                                       F32* dwell_out)
{
    S32 area = 0;
    S32 price = 0;
    S32 rent = 0;
    bool for_sale = false;
    F32 dwell = DWELL_NAN;

    if (mSelected)
    {
        if (mCurrentParcelSelection->mSelectedMultipleOwners)
        {
            area = mCurrentParcelSelection->getClaimableArea();
        }
        else
        {
            area = getSelectedArea();
        }

        if (mCurrentParcel->getForSale())
        {
            price = mCurrentParcel->getSalePrice();
            for_sale = true;
        }
        else
        {
            price = area * mCurrentParcel->getClaimPricePerMeter();
            for_sale = false;
        }

        rent = mCurrentParcel->getTotalRent();

        dwell = mSelectedDwell;
    }

    *area_out = area;
    *claim_out = price;
    *rent_out = rent;
    *for_sale_out = for_sale;
    *dwell_out = dwell;
}

S32 LLViewerParcelMgr::getSelectedArea() const
{
    S32 rv = 0;
    if(mSelected && mCurrentParcel && mCurrentParcelSelection->mWholeParcelSelected)
    {
        rv = mCurrentParcel->getArea();
    }
    else if(mSelected)
    {
        F64 width = mEastNorth.mdV[VX] - mWestSouth.mdV[VX];
        F64 height = mEastNorth.mdV[VY] - mWestSouth.mdV[VY];
        F32 area = (F32)(width * height);
        rv = ll_round(area);
    }
    return rv;
}

void LLViewerParcelMgr::resetSegments(U8* segments)
{
    S32 i;
    S32 count = (mParcelsPerEdge+1)*(mParcelsPerEdge+1);
    for (i = 0; i < count; i++)
    {
        segments[i] = 0x0;
    }
}


void LLViewerParcelMgr::writeHighlightSegments(F32 west, F32 south, F32 east,
                                               F32 north)
{
    S32 x, y;
    S32 min_x = ll_round( west / PARCEL_GRID_STEP_METERS );
    S32 max_x = ll_round( east / PARCEL_GRID_STEP_METERS );
    S32 min_y = ll_round( south / PARCEL_GRID_STEP_METERS );
    S32 max_y = ll_round( north / PARCEL_GRID_STEP_METERS );

    const S32 STRIDE = mParcelsPerEdge+1;

    // south edge
    y = min_y;
    for (x = min_x; x < max_x; x++)
    {
        // exclusive OR means that writing to this segment twice
        // will turn it off
        mHighlightSegments[x + y*STRIDE] ^= SOUTH_MASK;
    }

    // west edge
    x = min_x;
    for (y = min_y; y < max_y; y++)
    {
        mHighlightSegments[x + y*STRIDE] ^= WEST_MASK;
    }

    // north edge - draw the south border on the y+1'th cell,
    // which given C-style arrays, is item foo[max_y]
    y = max_y;
    for (x = min_x; x < max_x; x++)
    {
        mHighlightSegments[x + y*STRIDE] ^= SOUTH_MASK;
    }

    // east edge - draw west border on x+1'th cell
    x = max_x;
    for (y = min_y; y < max_y; y++)
    {
        mHighlightSegments[x + y*STRIDE] ^= WEST_MASK;
    }
}


void LLViewerParcelMgr::writeSegmentsFromBitmap(U8* bitmap, U8* segments)
{
    S32 x;
    S32 y;
    const S32 IN_STRIDE = mParcelsPerEdge;
    const S32 OUT_STRIDE = mParcelsPerEdge+1;

    for (y = 0; y < IN_STRIDE; y++)
    {
        x = 0;
        while( x < IN_STRIDE )
        {
            U8 byte = bitmap[ (x + y*IN_STRIDE) / 8 ];

            S32 bit;
            for (bit = 0; bit < 8; bit++)
            {
                if (byte & (1 << bit) )
                {
                    S32 out = x+y*OUT_STRIDE;

                    // This and one above it
                    segments[out]            ^= SOUTH_MASK;
                    segments[out+OUT_STRIDE] ^= SOUTH_MASK;

                    // This and one to the right
                    segments[out]   ^= WEST_MASK;
                    segments[out+1] ^= WEST_MASK;
                }
                x++;
            }
        }
    }
}


void LLViewerParcelMgr::writeAgentParcelFromBitmap(U8* bitmap)
{
    S32 x;
    S32 y;
    const S32 IN_STRIDE = mParcelsPerEdge;

    for (y = 0; y < IN_STRIDE; y++)
    {
        x = 0;
        while( x < IN_STRIDE )
        {
            U8 byte = bitmap[ (x + y*IN_STRIDE) / 8 ];

            S32 bit;
            for (bit = 0; bit < 8; bit++)
            {
                if (byte & (1 << bit) )
                {
                    mAgentParcelOverlay[x+y*IN_STRIDE] = 1;
                }
                else
                {
                    mAgentParcelOverlay[x+y*IN_STRIDE] = 0;
                }
                x++;
            }
        }
    }
}


// Given a point, find the PARCEL_GRID_STEP x PARCEL_GRID_STEP block
// containing it and select that.
LLParcelSelectionHandle LLViewerParcelMgr::selectParcelAt(const LLVector3d& pos_global)
{
    LLVector3d southwest = pos_global;
    LLVector3d northeast = pos_global;

    southwest -= LLVector3d( PARCEL_GRID_STEP_METERS/2, PARCEL_GRID_STEP_METERS/2, 0 );
    southwest.mdV[VX] = ll_round( southwest.mdV[VX], (F64)PARCEL_GRID_STEP_METERS );
    southwest.mdV[VY] = ll_round( southwest.mdV[VY], (F64)PARCEL_GRID_STEP_METERS );

    northeast += LLVector3d( PARCEL_GRID_STEP_METERS/2, PARCEL_GRID_STEP_METERS/2, 0 );
    northeast.mdV[VX] = ll_round( northeast.mdV[VX], (F64)PARCEL_GRID_STEP_METERS );
    northeast.mdV[VY] = ll_round( northeast.mdV[VY], (F64)PARCEL_GRID_STEP_METERS );

    // Snap to parcel
    return selectLand( southwest, northeast, true );
}


// Tries to select the parcel inside the rectangle
LLParcelSelectionHandle LLViewerParcelMgr::selectParcelInRectangle()
{
    return selectLand(mWestSouth, mEastNorth, true);
}


void LLViewerParcelMgr::selectCollisionParcel()
{
    // BUG: Claim to be in the agent's region
    mWestSouth = gAgent.getRegion()->getOriginGlobal();
    mEastNorth = mWestSouth;
    mEastNorth += LLVector3d(PARCEL_GRID_STEP_METERS, PARCEL_GRID_STEP_METERS, 0.0);

    // BUG: must be in the sim you are in
    LLMessageSystem *msg = gMessageSystem;
    msg->newMessageFast(_PREHASH_ParcelPropertiesRequestByID);
    msg->nextBlockFast(_PREHASH_AgentID);
    msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID() );
    msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID() );
    msg->nextBlockFast(_PREHASH_ParcelData);
    msg->addS32Fast(_PREHASH_SequenceID, SELECTED_PARCEL_SEQ_ID );
    msg->addS32Fast(_PREHASH_LocalID, mCollisionParcel->getLocalID() );
    gAgent.sendReliableMessage();

    mRequestResult = PARCEL_RESULT_NO_DATA;

    // Hack: Copy some data over temporarily
    mCurrentParcel->setName( mCollisionParcel->getName() );
    mCurrentParcel->setDesc( mCollisionParcel->getDesc() );
    mCurrentParcel->setPassPrice(mCollisionParcel->getPassPrice());
    mCurrentParcel->setPassHours(mCollisionParcel->getPassHours());

    // clear the list of segments to prevent flashing
    resetSegments(mHighlightSegments);

    mFloatingParcelSelection->setParcel(mCurrentParcel);
    mCurrentParcelSelection->setParcel(NULL);
    mCurrentParcelSelection = new LLParcelSelection(mCurrentParcel);

    mSelected = true;
    mCurrentParcelSelection->mWholeParcelSelected = true;
    notifyObservers();
    return;
}


// snap_selection = auto-select the hit parcel, if there is exactly one
LLParcelSelectionHandle LLViewerParcelMgr::selectLand(const LLVector3d &corner1, const LLVector3d &corner2,
                                   bool snap_selection)
{
    sanitize_corners( corner1, corner2, mWestSouth, mEastNorth );

    // ...x isn't more than one meter away
    F32 delta_x = getSelectionWidth();
    if (delta_x * delta_x <= 1.f * 1.f)
    {
        mSelected = false;
        notifyObservers();
        return NULL;
    }

    // ...y isn't more than one meter away
    F32 delta_y = getSelectionHeight();
    if (delta_y * delta_y <= 1.f * 1.f)
    {
        mSelected = false;
        notifyObservers();
        return NULL;
    }

    // Can't select across region boundary
    // We need to pull in the upper right corner by a little bit to allow
    // selection up to the x = 256 or y = 256 edge.
    LLVector3d east_north_region_check( mEastNorth );
    east_north_region_check.mdV[VX] -= 0.5;
    east_north_region_check.mdV[VY] -= 0.5;

    LLViewerRegion *region = LLWorld::getInstance()->getRegionFromPosGlobal(mWestSouth);
    LLViewerRegion *region_other = LLWorld::getInstance()->getRegionFromPosGlobal( east_north_region_check );

    if(!region)
    {
        // just in case they somehow selected no land.
        mSelected = false;
        return NULL;
    }

    if (region != region_other)
    {
        LLNotificationsUtil::add("CantSelectLandFromMultipleRegions");
        mSelected = false;
        notifyObservers();
        return NULL;
    }

    // Build region global copies of corners
    LLVector3 wsb_region = region->getPosRegionFromGlobal( mWestSouth );
    LLVector3 ent_region = region->getPosRegionFromGlobal( mEastNorth );

    // Send request message
    LLMessageSystem *msg = gMessageSystem;
    msg->newMessageFast(_PREHASH_ParcelPropertiesRequest);
    msg->nextBlockFast(_PREHASH_AgentData);
    msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID() );
    msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID() );
    msg->nextBlockFast(_PREHASH_ParcelData);
    msg->addS32Fast(_PREHASH_SequenceID, SELECTED_PARCEL_SEQ_ID );
    msg->addF32Fast(_PREHASH_West,  wsb_region.mV[VX] );
    msg->addF32Fast(_PREHASH_South, wsb_region.mV[VY] );
    msg->addF32Fast(_PREHASH_East,  ent_region.mV[VX] );
    msg->addF32Fast(_PREHASH_North, ent_region.mV[VY] );
    msg->addBOOL("SnapSelection", snap_selection);
    msg->sendReliable( region->getHost() );

    mRequestResult = PARCEL_RESULT_NO_DATA;

    mFloatingParcelSelection->setParcel(mCurrentParcel);
    mCurrentParcelSelection->setParcel(NULL);
    mCurrentParcelSelection = new LLParcelSelection(mCurrentParcel);

    mSelected = true;
    mCurrentParcelSelection->mWholeParcelSelected = snap_selection;
    notifyObservers();
    return mCurrentParcelSelection;
}

void LLViewerParcelMgr::deselectUnused()
{
    // no more outstanding references to this selection, other than our own
    if (mCurrentParcelSelection->getNumRefs() == 1 && mFloatingParcelSelection->getNumRefs() == 1)
    {
        deselectLand();
    }
}

void LLViewerParcelMgr::deselectLand()
{
    if (mSelected)
    {
        mSelected = false;

        // Invalidate the selected parcel
        mCurrentParcel->setLocalID(-1);
        mCurrentParcel->mAccessList.clear();
        mCurrentParcel->mBanList.clear();
        //mCurrentParcel->mRenterList.reset();

        mSelectedDwell = DWELL_NAN;

        // invalidate parcel selection so that existing users of this selection can clean up
        mCurrentParcelSelection->setParcel(NULL);
        mFloatingParcelSelection->setParcel(NULL);
        // create new parcel selection
        mCurrentParcelSelection = new LLParcelSelection(mCurrentParcel);

        notifyObservers(); // Notify observers *after* changing the parcel selection
    }
}


void LLViewerParcelMgr::addObserver(LLParcelObserver* observer)
{
    mObservers.push_back(observer);
}


void LLViewerParcelMgr::removeObserver(LLParcelObserver* observer)
{
    vector_replace_with_last(mObservers, observer);
}


// Call this method when it's time to update everyone on a new state.
// Copy the list because an observer could respond by removing itself
// from the list.
void LLViewerParcelMgr::notifyObservers()
{
    std::vector<LLParcelObserver*> observers;
    S32 count = mObservers.size();
    S32 i;
    for(i = 0; i < count; ++i)
    {
        observers.push_back(mObservers.at(i));
    }
    for(i = 0; i < count; ++i)
    {
        observers.at(i)->changed();
    }
}


//
// ACCESSORS
//
bool LLViewerParcelMgr::selectionEmpty() const
{
    return !mSelected;
}


LLParcelSelectionHandle LLViewerParcelMgr::getParcelSelection() const
{
    return mCurrentParcelSelection;
}

LLParcelSelectionHandle LLViewerParcelMgr::getFloatingParcelSelection() const
{
    return mFloatingParcelSelection;
}

LLParcel *LLViewerParcelMgr::getAgentParcel() const
{
    return mAgentParcel;
}


LLParcel * LLViewerParcelMgr::getAgentOrSelectedParcel() const
{
    LLParcel *parcel(nullptr);

    LLParcelSelectionHandle sel_handle(getFloatingParcelSelection());
    if (sel_handle)
    {
        LLParcelSelection *selection(sel_handle.get());
        if (selection)
        {
            parcel = selection->getParcel();
            if (parcel && (parcel->getLocalID() == INVALID_PARCEL_ID))
            {
                parcel = NULL;
            }
        }
    }

    if (!parcel)
        parcel = LLViewerParcelMgr::instance().getAgentParcel();

    return parcel;
}

// Return whether the agent can build on the land they are on
bool LLViewerParcelMgr::allowAgentBuild() const
{
    if (mAgentParcel)
    {
        return (gAgent.isGodlike() ||
                (mAgentParcel->allowModifyBy(gAgent.getID(), gAgent.getGroupID())) ||
                (isParcelOwnedByAgent(mAgentParcel, GP_LAND_ALLOW_CREATE)));
    }
    else
    {
        return gAgent.isGodlike();
    }
}

// Return whether anyone can build on the given parcel
bool LLViewerParcelMgr::allowAgentBuild(const LLParcel* parcel) const
{
    return parcel->getAllowModify();
}

bool LLViewerParcelMgr::allowAgentVoice() const
{
    return allowAgentVoice(gAgent.getRegion(), mAgentParcel);
}

bool LLViewerParcelMgr::allowAgentVoice(const LLViewerRegion* region, const LLParcel* parcel) const
{
    return region && region->isVoiceEnabled()
        && parcel   && parcel->getParcelFlagAllowVoice();
}

bool LLViewerParcelMgr::allowAgentFly(const LLViewerRegion* region, const LLParcel* parcel) const
{
    return region && !region->getBlockFly()
        && parcel && parcel->getAllowFly();
}

// Can the agent be pushed around by LLPushObject?
bool LLViewerParcelMgr::allowAgentPush(const LLViewerRegion* region, const LLParcel* parcel) const
{
    return region && !region->getRestrictPushObject()
        && parcel && !parcel->getRestrictPushObject();
}

bool LLViewerParcelMgr::allowAgentScripts(const LLViewerRegion* region, const LLParcel* parcel) const
{
    // *NOTE: This code does not take into account group-owned parcels
    // and the flag to allow group-owned scripted objects to run.
    // This mirrors the traditional menu bar parcel icon code, but is not
    // technically correct.
    return region
        && !region->getRegionFlag(REGION_FLAGS_SKIP_SCRIPTS)
        && !region->getRegionFlag(REGION_FLAGS_ESTATE_SKIP_SCRIPTS)
        && parcel
        && parcel->getAllowOtherScripts();
}

bool LLViewerParcelMgr::allowAgentDamage(const LLViewerRegion* region, const LLParcel* parcel) const
{
    return (region && region->getAllowDamage())
        || (parcel && parcel->getAllowDamage());
}

bool LLViewerParcelMgr::isOwnedAt(const LLVector3d& pos_global) const
{
    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal( pos_global );
    if (!region) return false;

    LLViewerParcelOverlay* overlay = region->getParcelOverlay();
    if (!overlay) return false;

    LLVector3 pos_region = region->getPosRegionFromGlobal( pos_global );

    return overlay->isOwned( pos_region );
}

bool LLViewerParcelMgr::isOwnedSelfAt(const LLVector3d& pos_global) const
{
    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal( pos_global );
    if (!region) return false;

    LLViewerParcelOverlay* overlay = region->getParcelOverlay();
    if (!overlay) return false;

    LLVector3 pos_region = region->getPosRegionFromGlobal( pos_global );

    return overlay->isOwnedSelf( pos_region );
}

bool LLViewerParcelMgr::isOwnedOtherAt(const LLVector3d& pos_global) const
{
    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal( pos_global );
    if (!region) return false;

    LLViewerParcelOverlay* overlay = region->getParcelOverlay();
    if (!overlay) return false;

    LLVector3 pos_region = region->getPosRegionFromGlobal( pos_global );

    return overlay->isOwnedOther( pos_region );
}

bool LLViewerParcelMgr::isSoundLocal(const LLVector3d& pos_global) const
{
    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal( pos_global );
    if (!region) return false;

    LLViewerParcelOverlay* overlay = region->getParcelOverlay();
    if (!overlay) return false;

    LLVector3 pos_region = region->getPosRegionFromGlobal( pos_global );

    return overlay->isSoundLocal( pos_region );
}

bool LLViewerParcelMgr::canHearSound(const LLVector3d &pos_global) const
{
    bool in_agent_parcel = inAgentParcel(pos_global);

    if (in_agent_parcel)
    {
        // In same parcel as the agent
        return true;
    }
    else
    {
        if (LLViewerParcelMgr::getInstance()->getAgentParcel()->getSoundLocal())
        {
            // Not in same parcel, and agent parcel only has local sound
            return false;
        }
        else if (LLViewerParcelMgr::getInstance()->isSoundLocal(pos_global))
        {
            // Not in same parcel, and target parcel only has local sound
            return false;
        }
        else
        {
            // Not in same parcel, but neither are local sound
            return true;
        }
    }
}


bool LLViewerParcelMgr::inAgentParcel(const LLVector3d &pos_global) const
{
    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal(pos_global);
    LLViewerRegion* agent_region = gAgent.getRegion();
    if (!region || !agent_region)
        return false;

    if (region != agent_region)
    {
        // Can't be in the agent parcel if you're not in the same region.
        return false;
    }

    LLVector3 pos_region = agent_region->getPosRegionFromGlobal(pos_global);
    S32 row =    S32(pos_region.mV[VY] / PARCEL_GRID_STEP_METERS);
    S32 column = S32(pos_region.mV[VX] / PARCEL_GRID_STEP_METERS);

    if (mAgentParcelOverlay[row*mParcelsPerEdge + column])
    {
        return true;
    }
    else
    {
        return false;
    }
}

// Returns NULL when there is no valid data.
LLParcel* LLViewerParcelMgr::getHoverParcel() const
{
    if (mHoverRequestResult == PARCEL_RESULT_SUCCESS)
    {
        return mHoverParcel;
    }
    else
    {
        return NULL;
    }
}

// Returns NULL when there is no valid data.
LLParcel* LLViewerParcelMgr::getCollisionParcel() const
{
    if (mRenderCollision)
    {
        return mCollisionParcel;
    }
    else
    {
        return NULL;
    }
}

//
// UTILITIES
//

void LLViewerParcelMgr::render()
{
    if (mSelected && mRenderSelection && gSavedSettings.getBOOL("RenderParcelSelection") && !gDisconnected)
    {
        // Rendering is done in agent-coordinates, so need to supply
        // an appropriate offset to the render code.
        LLViewerRegion* regionp = LLWorld::getInstance()->getRegionFromPosGlobal(mWestSouth);
        if (!regionp) return;

        renderHighlightSegments(mHighlightSegments, regionp);
    }
}


void LLViewerParcelMgr::renderParcelCollision()
{
    static LLCachedControl<S32> ban_lines_mode(gSavedSettings , "ShowBanLines" , PARCEL_BAN_LINES_ON_COLLISION);

    // check for expiration
    F32 expiration = (ban_lines_mode == PARCEL_BAN_LINES_ON_PROXIMITY)
        ? PARCEL_COLLISION_DRAW_SECS_ON_PROXIMITY
        : PARCEL_BAN_LINES_DRAW_SECS_ON_COLLISION;
    if (mCollisionTimer.getElapsedTimeF32() > expiration)
    {
        mRenderCollision = false;
    }

    if (mRenderCollision && ban_lines_mode != PARCEL_BAN_LINES_HIDE)
    {
        LLViewerRegion* regionp = gAgent.getRegion();
        if (regionp)
        {
            bool use_pass = mCollisionParcel->getParcelFlag(PF_USE_PASS_LIST);
            renderCollisionSegments(mCollisionSegments, use_pass, regionp);
        }
    }
}


void LLViewerParcelMgr::sendParcelAccessListRequest(U32 flags)
{
    if (!mSelected)
    {
        return;
    }

    LLViewerRegion *region = LLWorld::getInstance()->getRegionFromPosGlobal( mWestSouth );
    if (!region) return;

    LLMessageSystem *msg = gMessageSystem;


    if (flags & AL_BAN)
    {
        mCurrentParcel->mBanList.clear();
    }
    if (flags & AL_ACCESS)
    {
        mCurrentParcel->mAccessList.clear();
    }
    if (flags & AL_ALLOW_EXPERIENCE)
    {
        mCurrentParcel->clearExperienceKeysByType(EXPERIENCE_KEY_TYPE_ALLOWED);
    }
    if (flags & AL_BLOCK_EXPERIENCE)
    {
        mCurrentParcel->clearExperienceKeysByType(EXPERIENCE_KEY_TYPE_BLOCKED);
    }

    // Only the headers differ
    msg->newMessageFast(_PREHASH_ParcelAccessListRequest);
    msg->nextBlockFast(_PREHASH_AgentData);
    msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
    msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
    msg->nextBlockFast(_PREHASH_Data);
    msg->addS32Fast(_PREHASH_SequenceID, 0);
    msg->addU32Fast(_PREHASH_Flags, flags);
    msg->addS32("LocalID", mCurrentParcel->getLocalID() );
    msg->sendReliable( region->getHost() );
}


void LLViewerParcelMgr::sendParcelDwellRequest()
{
    if (!mSelected)
    {
        return;
    }

    LLViewerRegion *region = LLWorld::getInstance()->getRegionFromPosGlobal( mWestSouth );
    if (!region) return;

    LLMessageSystem *msg = gMessageSystem;

    // Only the headers differ
    msg->newMessage("ParcelDwellRequest");
    msg->nextBlock("AgentData");
    msg->addUUID("AgentID", gAgent.getID() );
    msg->addUUID("SessionID", gAgent.getSessionID());
    msg->nextBlock("Data");
    msg->addS32("LocalID", mCurrentParcel->getLocalID());
    msg->addUUID("ParcelID", LLUUID::null); // filled in on simulator
    msg->sendReliable( region->getHost() );
}


void LLViewerParcelMgr::sendParcelGodForceOwner(const LLUUID& owner_id)
{
    if (!mSelected)
    {
        LLNotificationsUtil::add("CannotSetLandOwnerNothingSelected");
        return;
    }

    LL_INFOS("ParcelMgr") << "Claiming " << mWestSouth << " to " << mEastNorth << LL_ENDL;

    // BUG: Only works for the region containing mWestSouthBottom
    LLVector3d east_north_region_check( mEastNorth );
    east_north_region_check.mdV[VX] -= 0.5;
    east_north_region_check.mdV[VY] -= 0.5;

    LLViewerRegion *region = LLWorld::getInstance()->getRegionFromPosGlobal( mWestSouth );
    if (!region)
    {
        // TODO: Add a force owner version of this alert.
        LLNotificationsUtil::add("CannotContentifyNoRegion");
        return;
    }

    // BUG: Make work for cross-region selections
    LLViewerRegion *region2 = LLWorld::getInstance()->getRegionFromPosGlobal( east_north_region_check );
    if (region != region2)
    {
        LLNotificationsUtil::add("CannotSetLandOwnerMultipleRegions");
        return;
    }

    LL_INFOS("ParcelMgr") << "Region " << region->getOriginGlobal() << LL_ENDL;

    LLSD payload;
    payload["owner_id"] = owner_id;
    payload["parcel_local_id"] = mCurrentParcel->getLocalID();
    payload["region_host"] = region->getHost().getIPandPort();
    LLNotification::Params params("ForceOwnerAuctionWarning");
    params.payload(payload).functor.function(callback_god_force_owner);

    if(mCurrentParcel->getAuctionID())
    {
        LLNotifications::instance().add(params);
    }
    else
    {
        LLNotifications::instance().forceResponse(params, 0);
    }
}

bool callback_god_force_owner(const LLSD& notification, const LLSD& response)
{
    S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
    if(0 == option)
    {
        LLMessageSystem* msg = gMessageSystem;
        msg->newMessage("ParcelGodForceOwner");
        msg->nextBlock("AgentData");
        msg->addUUID("AgentID", gAgent.getID());
        msg->addUUID("SessionID", gAgent.getSessionID());
        msg->nextBlock("Data");
        msg->addUUID("OwnerID", notification["payload"]["owner_id"].asUUID());
        msg->addS32( "LocalID", notification["payload"]["parcel_local_id"].asInteger());
        msg->sendReliable(LLHost(notification["payload"]["region_host"].asString()));
    }
    return false;
}

void LLViewerParcelMgr::sendParcelGodForceToContent()
{
    if (!mSelected)
    {
        LLNotificationsUtil::add("CannotContentifyNothingSelected");
        return;
    }
    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal( mWestSouth );
    if (!region)
    {
        LLNotificationsUtil::add("CannotContentifyNoRegion");
        return;
    }

    LLMessageSystem* msg = gMessageSystem;
    msg->newMessage("ParcelGodMarkAsContent");
    msg->nextBlock("AgentData");
    msg->addUUID("AgentID", gAgent.getID());
    msg->addUUID("SessionID", gAgent.getSessionID());
    msg->nextBlock("ParcelData");
    msg->addS32("LocalID", mCurrentParcel->getLocalID());
    msg->sendReliable(region->getHost());
}

void LLViewerParcelMgr::sendParcelRelease()
{
    if (!mSelected)
    {
        LLNotificationsUtil::add("CannotReleaseLandNothingSelected");
        return;
    }

    LLViewerRegion *region = LLWorld::getInstance()->getRegionFromPosGlobal( mWestSouth );
    if (!region)
    {
        LLNotificationsUtil::add("CannotReleaseLandNoRegion");
        return;
    }

    //U32 flags = PR_NONE;
    //if (god_force) flags |= PR_GOD_FORCE;

    LLMessageSystem* msg = gMessageSystem;
    msg->newMessage("ParcelRelease");
    msg->nextBlock("AgentData");
    msg->addUUID("AgentID", gAgent.getID() );
    msg->addUUID("SessionID", gAgent.getSessionID() );
    msg->nextBlock("Data");
    msg->addS32("LocalID", mCurrentParcel->getLocalID() );
    //msg->addU32("Flags", flags);
    msg->sendReliable( region->getHost() );

    // Blitz selection, since the parcel might be non-rectangular, and
    // we won't have appropriate parcel information.
    deselectLand();
}

class LLViewerParcelMgr::ParcelBuyInfo
{
public:
    LLUUID  mAgent;
    LLUUID  mSession;
    LLUUID  mGroup;
    bool    mIsGroupOwned;
    bool    mRemoveContribution;
    bool    mIsClaim;
    LLHost  mHost;

    // for parcel buys
    S32     mParcelID;
    S32     mPrice;
    S32     mArea;

    // for land claims
    F32     mWest;
    F32     mSouth;
    F32     mEast;
    F32     mNorth;
};

LLViewerParcelMgr::ParcelBuyInfo* LLViewerParcelMgr::setupParcelBuy(
    const LLUUID& agent_id,
    const LLUUID& session_id,
    const LLUUID& group_id,
    bool is_group_owned,
    bool is_claim,
    bool remove_contribution)
{
    if (!mSelected || !mCurrentParcel)
    {
        LLNotificationsUtil::add("CannotBuyLandNothingSelected");
        return NULL;
    }

    LLViewerRegion *region = LLWorld::getInstance()->getRegionFromPosGlobal( mWestSouth );
    if (!region)
    {
        LLNotificationsUtil::add("CannotBuyLandNoRegion");
        return NULL;
    }

    if (is_claim)
    {
        LL_INFOS("ParcelMgr") << "Claiming " << mWestSouth << " to " << mEastNorth << LL_ENDL;
        LL_INFOS("ParcelMgr") << "Region " << region->getOriginGlobal() << LL_ENDL;

        // BUG: Only works for the region containing mWestSouthBottom
        LLVector3d east_north_region_check( mEastNorth );
        east_north_region_check.mdV[VX] -= 0.5;
        east_north_region_check.mdV[VY] -= 0.5;

        LLViewerRegion *region2 = LLWorld::getInstance()->getRegionFromPosGlobal( east_north_region_check );

        if (region != region2)
        {
            LLNotificationsUtil::add("CantBuyLandAcrossMultipleRegions");
            return NULL;
        }
    }


    ParcelBuyInfo* info = new ParcelBuyInfo;

    info->mAgent = agent_id;
    info->mSession = session_id;
    info->mGroup = group_id;
    info->mIsGroupOwned = is_group_owned;
    info->mIsClaim = is_claim;
    info->mRemoveContribution = remove_contribution;
    info->mHost = region->getHost();
    info->mPrice = mCurrentParcel->getSalePrice();
    info->mArea = mCurrentParcel->getArea();

    if (!is_claim)
    {
        info->mParcelID = mCurrentParcel->getLocalID();
    }
    else
    {
        // BUG: Make work for cross-region selections
        LLVector3 west_south_bottom_region = region->getPosRegionFromGlobal( mWestSouth );
        LLVector3 east_north_top_region = region->getPosRegionFromGlobal( mEastNorth );

        info->mWest     = west_south_bottom_region.mV[VX];
        info->mSouth    = west_south_bottom_region.mV[VY];
        info->mEast     = east_north_top_region.mV[VX];
        info->mNorth    = east_north_top_region.mV[VY];
    }

    return info;
}

void LLViewerParcelMgr::sendParcelBuy(ParcelBuyInfo* info)
{
    // send the message
    LLMessageSystem* msg = gMessageSystem;
    msg->newMessage(info->mIsClaim ? "ParcelClaim" : "ParcelBuy");
    msg->nextBlock("AgentData");
    msg->addUUID("AgentID", info->mAgent);
    msg->addUUID("SessionID", info->mSession);
    msg->nextBlock("Data");
    msg->addUUID("GroupID", info->mGroup);
    msg->addBOOL("IsGroupOwned", info->mIsGroupOwned);
    if (!info->mIsClaim)
    {
        msg->addBOOL("RemoveContribution", info->mRemoveContribution);
        msg->addS32("LocalID", info->mParcelID);
    }
    msg->addBOOL("Final", true);    // don't allow escrow buys
    if (info->mIsClaim)
    {
        msg->nextBlock("ParcelData");
        msg->addF32("West",  info->mWest);
        msg->addF32("South", info->mSouth);
        msg->addF32("East",  info->mEast);
        msg->addF32("North", info->mNorth);
    }
    else // ParcelBuy
    {
        msg->nextBlock("ParcelData");
        msg->addS32("Price",info->mPrice);
        msg->addS32("Area",info->mArea);
    }
    msg->sendReliable(info->mHost);
}

void LLViewerParcelMgr::deleteParcelBuy(ParcelBuyInfo* *info)
{
    // Must be here because ParcelBuyInfo is local to this .cpp file
    delete *info;
    *info = NULL;
}

void LLViewerParcelMgr::sendParcelDeed(const LLUUID& group_id)
{
    if (!mSelected || !mCurrentParcel)
    {
        LLNotificationsUtil::add("CannotDeedLandNothingSelected");
        return;
    }
    if(group_id.isNull())
    {
        LLNotificationsUtil::add("CannotDeedLandNoGroup");
        return;
    }
    LLViewerRegion *region = LLWorld::getInstance()->getRegionFromPosGlobal( mWestSouth );
    if (!region)
    {
        LLNotificationsUtil::add("CannotDeedLandNoRegion");
        return;
    }

    LLMessageSystem* msg = gMessageSystem;
    msg->newMessage("ParcelDeedToGroup");
    msg->nextBlock("AgentData");
    msg->addUUID("AgentID", gAgent.getID() );
    msg->addUUID("SessionID", gAgent.getSessionID() );
    msg->nextBlock("Data");
    msg->addUUID("GroupID", group_id );
    msg->addS32("LocalID", mCurrentParcel->getLocalID() );
    //msg->addU32("JoinNeighbors", join);
    msg->sendReliable( region->getHost() );
}


/*
// *NOTE: We cannot easily make landmarks at global positions because
// global positions probably refer to a sim/local combination which
// can move over time. We could implement this by looking up the
// region global x,y, but it's easier to take it out for now.
void LLViewerParcelMgr::makeLandmarkAtSelection()
{
    // Don't create for parcels you don't own
    if (gAgent.getID() != mCurrentParcel->getOwnerID())
    {
        return;
    }

    LLVector3d global_center(mWestSouth);
    global_center += mEastNorth;
    global_center *= 0.5f;

    LLViewerRegion* region;
    region = LLWorld::getInstance()->getRegionFromPosGlobal(global_center);

    LLVector3 west_south_bottom_region = region->getPosRegionFromGlobal( mWestSouth );
    LLVector3 east_north_top_region = region->getPosRegionFromGlobal( mEastNorth );

    std::string name("My Land");
    std::string buffer;
    S32 pos_x = (S32)floor((west_south_bottom_region.mV[VX] + east_north_top_region.mV[VX]) / 2.0f);
    S32 pos_y = (S32)floor((west_south_bottom_region.mV[VY] + east_north_top_region.mV[VY]) / 2.0f);
    buffer = llformat("%s in %s (%d, %d)",
            name.c_str(),
            region->getName().c_str(),
            pos_x, pos_y);
    name.assign(buffer);

    create_landmark(name, "Claimed land", global_center);
}
*/

const std::string& LLViewerParcelMgr::getAgentParcelName() const
{
    return mAgentParcel->getName();
}


const S32 LLViewerParcelMgr::getAgentParcelId() const
{
    if (mAgentParcel)
        return mAgentParcel->getLocalID();
    return INVALID_PARCEL_ID;
}

void LLViewerParcelMgr::sendParcelPropertiesUpdate(LLParcel* parcel, bool use_agent_region)
{
    if(!parcel)
        return;

    LLViewerRegion *region = use_agent_region ? gAgent.getRegion() : LLWorld::getInstance()->getRegionFromPosGlobal( mWestSouth );
    if (!region)
        return;

    LLSD body;
    std::string url = region->getCapability("ParcelPropertiesUpdate");
    if (!url.empty())
    {
        // request new properties update from simulator
        U32 message_flags = 0x01;
        body["flags"] = ll_sd_from_U32(message_flags);
        parcel->packMessage(body);
        LL_INFOS("ParcelMgr") << "Sending parcel properties update via capability to: "
            << url << LL_ENDL;

        LLCoreHttpUtil::HttpCoroutineAdapter::messageHttpPost(url, body,
            "Parcel Properties sent to sim.", "Parcel Properties failed to send to sim.");
    }
    else
    {
        LLMessageSystem* msg = gMessageSystem;
        msg->newMessageFast(_PREHASH_ParcelPropertiesUpdate);
        msg->nextBlockFast(_PREHASH_AgentData);
        msg->addUUIDFast(_PREHASH_AgentID,  gAgent.getID() );
        msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
        msg->nextBlockFast(_PREHASH_ParcelData);
        msg->addS32Fast(_PREHASH_LocalID, parcel->getLocalID() );

        U32 message_flags = 0x01;
        msg->addU32("Flags", message_flags);

        parcel->packMessage(msg);

        msg->sendReliable( region->getHost() );
    }
}


void LLViewerParcelMgr::setHoverParcel(const LLVector3d& pos)
{
    static U32 last_west, last_south;
    static LLUUID last_region;

    // only request parcel info if position has changed outside of the
    // last parcel grid step
    const U32 west_parcel_step = (U32) floor( pos.mdV[VX] / PARCEL_GRID_STEP_METERS );
    const U32 south_parcel_step = (U32) floor( pos.mdV[VY] / PARCEL_GRID_STEP_METERS );

    if ((west_parcel_step == last_west) && (south_parcel_step == last_south))
    {
        // We are staying in same segment
        return;
    }

    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal( pos );
    if (!region)
    {
        return;
    }

    LLUUID region_id = region->getRegionID();
    LLVector3 pos_in_region = region->getPosRegionFromGlobal(pos);

    bool request_properties = false;
    if (region_id != last_region)
    {
        request_properties = true;
    }
    else
    {
        // Check if new position is in same parcel.
        // This check is not ideal, since it checks by way of straight lines.
        // So sometimes (small parcel in the middle of large one) it can
        // decide that parcel actually changed, but it still allows to
        // reduce amount of requests significantly

        S32 west_parcel_local = (S32)(pos_in_region.mV[VX] / PARCEL_GRID_STEP_METERS);
        S32 south_parcel_local = (S32)(pos_in_region.mV[VY] / PARCEL_GRID_STEP_METERS);

        LLViewerParcelOverlay* overlay = region->getParcelOverlay();
        if (!overlay)
        {
             request_properties = true;
        }
        while (!request_properties && west_parcel_step < last_west)
        {
            S32 segment_shift = last_west - west_parcel_step;
            request_properties = overlay->parcelLineFlags(south_parcel_local, west_parcel_local + segment_shift) & PARCEL_WEST_LINE;
            last_west--;
        }
        while (!request_properties && south_parcel_step < last_south)
        {
            S32 segment_shift = last_south - south_parcel_step;
            request_properties = overlay->parcelLineFlags(south_parcel_local + segment_shift, west_parcel_local) & PARCEL_SOUTH_LINE;
            last_south--;
        }
        // Note: could have just swapped values, reused first two 'while' and set last_south, last_west separately,
        // but this looks to be easier to understand/straightforward/less bulky
        while (!request_properties && west_parcel_step > last_west)
        {
            S32 segment_shift = west_parcel_step - last_west;
            request_properties = overlay->parcelLineFlags(south_parcel_local, west_parcel_local - segment_shift + 1) & PARCEL_WEST_LINE;
            last_west++;
        }
        while (!request_properties && south_parcel_step > last_south)
        {
            S32 segment_shift = south_parcel_step - last_south;
            request_properties = overlay->parcelLineFlags(south_parcel_local - segment_shift + 1, west_parcel_local) & PARCEL_SOUTH_LINE;
            last_south++;
        }

        // if (!request_properties) last_south and last_west will be equal to new values
    }

    if (request_properties)
    {
        last_west = west_parcel_step;
        last_south = south_parcel_step;
        last_region = region_id;

        LL_DEBUGS("ParcelMgr") << "Requesting parcel properties on hover, for " << pos << LL_ENDL;


        // Send a rectangle around the point.
        // This means the parcel sent back is at least a rectangle around the point,
        // which is more efficient for public land.  Fewer requests are sent.  JC
        F32 west = PARCEL_GRID_STEP_METERS * floor(pos_in_region.mV[VX] / PARCEL_GRID_STEP_METERS);
        F32 south = PARCEL_GRID_STEP_METERS * floor(pos_in_region.mV[VY] / PARCEL_GRID_STEP_METERS);

        F32 east = west + PARCEL_GRID_STEP_METERS;
        F32 north = south + PARCEL_GRID_STEP_METERS;

        // Send request message
        LLMessageSystem *msg = gMessageSystem;
        msg->newMessageFast(_PREHASH_ParcelPropertiesRequest);
        msg->nextBlockFast(_PREHASH_AgentData);
        msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
        msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
        msg->nextBlockFast(_PREHASH_ParcelData);
        msg->addS32Fast(_PREHASH_SequenceID, HOVERED_PARCEL_SEQ_ID);
        msg->addF32Fast(_PREHASH_West, west);
        msg->addF32Fast(_PREHASH_South, south);
        msg->addF32Fast(_PREHASH_East, east);
        msg->addF32Fast(_PREHASH_North, north);
        msg->addBOOL("SnapSelection", false);
        msg->sendReliable(region->getHost());

        mHoverRequestResult = PARCEL_RESULT_NO_DATA;
    }
}


// static
void LLViewerParcelMgr::processParcelOverlay(LLMessageSystem *msg, void **user)
{
    // Extract the packed overlay information
    S32 packed_overlay_size = msg->getSizeFast(_PREHASH_ParcelData, _PREHASH_Data);

    if (packed_overlay_size <= 0)
    {
        LL_WARNS() << "Overlay size " << packed_overlay_size << LL_ENDL;
        return;
    }

    S32 parcels_per_edge = LLViewerParcelMgr::getInstance()->mParcelsPerEdge;
    S32 expected_size = parcels_per_edge * parcels_per_edge / PARCEL_OVERLAY_CHUNKS;
    if (packed_overlay_size != expected_size)
    {
        LL_WARNS() << "Got parcel overlay size " << packed_overlay_size
            << " expecting " << expected_size << LL_ENDL;
        return;
    }

    S32 sequence_id;
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_SequenceID, sequence_id);
    msg->getBinaryDataFast(
            _PREHASH_ParcelData,
            _PREHASH_Data,
            sPackedOverlay,
            expected_size);

    LLHost host = msg->getSender();
    LLViewerRegion *region = LLWorld::getInstance()->getRegion(host);
    if (region)
    {
        region->mParcelOverlay->uncompressLandOverlay( sequence_id, sPackedOverlay );
    }
}

// static
void LLViewerParcelMgr::processParcelProperties(LLMessageSystem *msg, void **user)
{
    if (LLApp::isExiting() || gDisconnected)
    {
        LL_DEBUGS("ParcelMgr") << "Ignoring parcel properties, shutting down" << LL_ENDL;
        return;
    }

    S32     request_result;
    S32     sequence_id;
    bool    snap_selection = false;
    S32     self_count = 0;
    S32     other_count = 0;
    S32     public_count = 0;
    S32     local_id;
    LLUUID  owner_id;
    bool    is_group_owned;
    U32 auction_id = 0;
    S32     claim_price_per_meter = 0;
    S32     rent_price_per_meter = 0;
    S32     claim_date = 0;
    LLVector3   aabb_min;
    LLVector3   aabb_max;
    S32     area = 0;
    S32     sw_max_prims = 0;
    S32     sw_total_prims = 0;
    //LLUUID    buyer_id;
    U8 status = 0;
    S32     max_prims = 0;
    S32     total_prims = 0;
    S32     owner_prims = 0;
    S32     group_prims = 0;
    S32     other_prims = 0;
    S32     selected_prims = 0;
    F32     parcel_prim_bonus = 1.f;
    bool    region_push_override = false;
    bool    region_deny_anonymous_override = false;
    bool    region_deny_identified_override = false; // Deprecated
    bool    region_deny_transacted_override = false; // Deprecated
    bool    region_deny_age_unverified_override = false;
    bool    region_allow_access_override = true;
    bool    region_allow_environment_override = true;
    S32     parcel_environment_version = 0;
    bool    agent_parcel_update = false; // updating previous(existing) agent parcel
    U32     extended_flags = 0; //obscure MOAP

    S32     other_clean_time = 0;

    LLViewerParcelMgr& parcel_mgr = LLViewerParcelMgr::instance();

    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_RequestResult, request_result);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_SequenceID, sequence_id);

    if (request_result == PARCEL_RESULT_NO_DATA)
    {
        // no valid parcel data
        LL_INFOS("ParcelMgr") << "no valid parcel data" << LL_ENDL;
        return;
    }

    // Decide where the data will go.
    LLParcel* parcel = NULL;
    if (sequence_id == SELECTED_PARCEL_SEQ_ID)
    {
        // ...selected parcels report this sequence id
        parcel_mgr.mRequestResult = PARCEL_RESULT_SUCCESS;
        parcel = parcel_mgr.mCurrentParcel;
    }
    else if (sequence_id == HOVERED_PARCEL_SEQ_ID)
    {
        parcel_mgr.mHoverRequestResult = PARCEL_RESULT_SUCCESS;
        parcel = parcel_mgr.mHoverParcel;
    }
    else if (sequence_id == COLLISION_NOT_IN_GROUP_PARCEL_SEQ_ID ||
        sequence_id == COLLISION_NOT_ON_LIST_PARCEL_SEQ_ID ||
        sequence_id == COLLISION_BANNED_PARCEL_SEQ_ID)
    {
        parcel_mgr.mHoverRequestResult = PARCEL_RESULT_SUCCESS;
        parcel = parcel_mgr.mCollisionParcel;
    }
    else if (sequence_id == 0 || sequence_id > parcel_mgr.mAgentParcelSequenceID)
    {
        // new agent parcel
        // *TODO: Does it really make sense to set the agent parcel to this
        // parcel if the client doesn't know what kind of parcel data this is?
        parcel_mgr.mAgentParcelSequenceID = sequence_id;
        parcel = parcel_mgr.mAgentParcel;
    }
    else
    {
        LL_INFOS("ParcelMgr") << "out of order agent parcel sequence id " << sequence_id
            << " last good " << parcel_mgr.mAgentParcelSequenceID
            << LL_ENDL;
        return;
    }

    msg->getBOOL("ParcelData", "SnapSelection", snap_selection);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_SelfCount, self_count);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_OtherCount, other_count);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_PublicCount, public_count);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_LocalID, local_id);
    msg->getUUIDFast(_PREHASH_ParcelData, _PREHASH_OwnerID, owner_id);
    msg->getBOOLFast(_PREHASH_ParcelData, _PREHASH_IsGroupOwned, is_group_owned);
    msg->getU32Fast(_PREHASH_ParcelData, _PREHASH_AuctionID, auction_id);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_ClaimDate, claim_date);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_ClaimPrice, claim_price_per_meter);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_RentPrice, rent_price_per_meter);
    msg->getVector3Fast(_PREHASH_ParcelData, _PREHASH_AABBMin, aabb_min);
    msg->getVector3Fast(_PREHASH_ParcelData, _PREHASH_AABBMax, aabb_max);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_Area, area);
    //msg->getUUIDFast( _PREHASH_ParcelData, _PREHASH_BuyerID, buyer_id);
    msg->getU8("ParcelData", "Status", status);
    msg->getS32("ParcelData", "SimWideMaxPrims", sw_max_prims);
    msg->getS32("ParcelData", "SimWideTotalPrims", sw_total_prims);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_MaxPrims, max_prims);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_TotalPrims, total_prims);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_OwnerPrims, owner_prims);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_GroupPrims, group_prims);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_OtherPrims, other_prims);
    msg->getS32Fast(_PREHASH_ParcelData, _PREHASH_SelectedPrims, selected_prims);
    msg->getF32Fast(_PREHASH_ParcelData, _PREHASH_ParcelPrimBonus, parcel_prim_bonus);
    msg->getBOOLFast(_PREHASH_ParcelData, _PREHASH_RegionPushOverride, region_push_override);
    msg->getBOOLFast(_PREHASH_ParcelData, _PREHASH_RegionDenyAnonymous, region_deny_anonymous_override);
    msg->getBOOLFast(_PREHASH_ParcelData, _PREHASH_RegionDenyIdentified, region_deny_identified_override); // Deprecated
    msg->getBOOLFast(_PREHASH_ParcelData, _PREHASH_RegionDenyTransacted, region_deny_transacted_override); // Deprecated
    if (msg->getNumberOfBlocksFast(_PREHASH_AgeVerificationBlock))
    {
        // this block was added later and may not be on older sims, so we have to test its existence first
        msg->getBOOLFast(_PREHASH_AgeVerificationBlock, _PREHASH_RegionDenyAgeUnverified, region_deny_age_unverified_override);
    }

    if (msg->getNumberOfBlocks(_PREHASH_RegionAllowAccessBlock))
    {
        msg->getBOOLFast(_PREHASH_RegionAllowAccessBlock, _PREHASH_RegionAllowAccessOverride, region_allow_access_override);
    }

    if (msg->getNumberOfBlocks(_PREHASH_ParcelExtendedFlags))
    {
        msg->getU32Fast(_PREHASH_ParcelExtendedFlags, _PREHASH_Flags, extended_flags);
     }

    if (msg->getNumberOfBlocks(_PREHASH_ParcelEnvironmentBlock))
    {
        msg->getS32Fast(_PREHASH_ParcelEnvironmentBlock, _PREHASH_ParcelEnvironmentVersion, parcel_environment_version);
        msg->getBOOLFast(_PREHASH_ParcelEnvironmentBlock, _PREHASH_RegionAllowEnvironmentOverride, region_allow_environment_override);
    }

    msg->getS32("ParcelData", "OtherCleanTime", other_clean_time );

    LL_DEBUGS("ParcelMgr") << "Processing parcel " << local_id << " update, target(sequence): " << sequence_id << LL_ENDL;

    // Actually extract the data.
    if (parcel)
    {
        if (local_id == parcel_mgr.mAgentParcel->getLocalID())
        {
            // Parcels in different regions can have same ids.
            LLViewerRegion* parcel_region = LLWorld::getInstance()->getRegion(msg->getSender());
            LLViewerRegion* agent_region = gAgent.getRegion();
            if (parcel_region && agent_region && parcel_region->getRegionID() == agent_region->getRegionID())
            {
                // we got an updated version of agent parcel
                agent_parcel_update = true;
            }
        }

        S32 cur_parcel_environment_version = parcel->getParcelEnvironmentVersion();
        bool environment_changed = (cur_parcel_environment_version != parcel_environment_version);

        parcel->init(owner_id,
            false, false, false,
            claim_date, claim_price_per_meter, rent_price_per_meter,
            area, other_prims, parcel_prim_bonus, is_group_owned);
        parcel->setLocalID(local_id);
        parcel->setAABBMin(aabb_min);
        parcel->setAABBMax(aabb_max);

        parcel->setAuctionID(auction_id);
        parcel->setOwnershipStatus((LLParcel::EOwnershipStatus)status);

        parcel->setSimWideMaxPrimCapacity(sw_max_prims);
        parcel->setSimWidePrimCount(sw_total_prims);
        parcel->setMaxPrimCapacity(max_prims);
        parcel->setOwnerPrimCount(owner_prims);
        parcel->setGroupPrimCount(group_prims);
        parcel->setOtherPrimCount(other_prims);
        parcel->setSelectedPrimCount(selected_prims);
        parcel->setParcelPrimBonus(parcel_prim_bonus);

        parcel->setCleanOtherTime(other_clean_time);
        parcel->setRegionPushOverride(region_push_override);
        parcel->setRegionDenyAnonymousOverride(region_deny_anonymous_override);
        parcel->setRegionDenyAgeUnverifiedOverride(region_deny_age_unverified_override);
        parcel->setRegionAllowAccessOverride(region_allow_access_override);
        parcel->setParcelEnvironmentVersion(cur_parcel_environment_version);
        parcel->setRegionAllowEnvironmentOverride(region_allow_environment_override);

        parcel->setObscureMOAP((bool)extended_flags);

        parcel->unpackMessage(msg);

        if (parcel == parcel_mgr.mAgentParcel)
        {
            // new agent parcel
            S32 bitmap_size =   parcel_mgr.mParcelsPerEdge
                                * parcel_mgr.mParcelsPerEdge
                                / 8;
            U8* bitmap = new U8[ bitmap_size ];
            msg->getBinaryDataFast(_PREHASH_ParcelData, _PREHASH_Bitmap, bitmap, bitmap_size);

            parcel_mgr.writeAgentParcelFromBitmap(bitmap);
            delete[] bitmap;

            // Let interesting parties know about agent parcel change.
            LLViewerParcelMgr* instance = LLViewerParcelMgr::getInstance();

            if (instance->mTeleportInProgress)
            {
                instance->mTeleportInProgress = false;
                if(instance->mTeleportInProgressPosition.isNull())
                {
                    //initial update
                    instance->mTeleportFinishedSignal(gAgent.getPositionGlobal(), false);
                }
                else
                {
                    instance->mTeleportFinishedSignal(instance->mTeleportInProgressPosition, false);
                }
            }
            parcel->setParcelEnvironmentVersion(parcel_environment_version);
            LL_DEBUGS("ENVIRONMENT") << "Parcel environment version is " << parcel->getParcelEnvironmentVersion() << LL_ENDL;

            // Notify anything that wants to know when the agent changes parcels
            gAgent.changeParcels();
            instance->mTeleportInProgress = false;
        }
        else if (agent_parcel_update)
        {
            parcel->setParcelEnvironmentVersion(parcel_environment_version);
            // updated agent parcel
            parcel_mgr.mAgentParcel->unpackMessage(msg);
            if ((LLEnvironment::instance().isExtendedEnvironmentEnabled() && environment_changed))
            {
                LL_DEBUGS("ENVIRONMENT") << "Parcel environment version is " << parcel->getParcelEnvironmentVersion() << LL_ENDL;
                LLEnvironment::instance().requestParcel(local_id);
            }
        }
    }

    // Handle updating selections, if necessary.
    if (sequence_id == SELECTED_PARCEL_SEQ_ID)
    {
        // Update selected counts
        parcel_mgr.mCurrentParcelSelection->mSelectedSelfCount = self_count;
        parcel_mgr.mCurrentParcelSelection->mSelectedOtherCount = other_count;
        parcel_mgr.mCurrentParcelSelection->mSelectedPublicCount = public_count;

        parcel_mgr.mCurrentParcelSelection->mSelectedMultipleOwners =
                            (request_result == PARCEL_RESULT_MULTIPLE);

        // Select the whole parcel
        LLViewerRegion* region = LLWorld::getInstance()->getRegion( msg->getSender() );
        if (region)
        {
            if (!snap_selection)
            {
                // don't muck with the westsouth and eastnorth.
                // just highlight it
                LLVector3 west_south = region->getPosRegionFromGlobal(parcel_mgr.mWestSouth);
                LLVector3 east_north = region->getPosRegionFromGlobal(parcel_mgr.mEastNorth);

                parcel_mgr.resetSegments(parcel_mgr.mHighlightSegments);
                parcel_mgr.writeHighlightSegments(
                                west_south.mV[VX],
                                west_south.mV[VY],
                                east_north.mV[VX],
                                east_north.mV[VY] );
                parcel_mgr.mCurrentParcelSelection->mWholeParcelSelected = false;
            }
            else if (0 == local_id)
            {
                // this is public land, just highlight the selection
                parcel_mgr.mWestSouth = region->getPosGlobalFromRegion( aabb_min );
                parcel_mgr.mEastNorth = region->getPosGlobalFromRegion( aabb_max );

                parcel_mgr.resetSegments(parcel_mgr.mHighlightSegments);
                parcel_mgr.writeHighlightSegments(
                                aabb_min.mV[VX],
                                aabb_min.mV[VY],
                                aabb_max.mV[VX],
                                aabb_max.mV[VY] );
                parcel_mgr.mCurrentParcelSelection->mWholeParcelSelected = true;
            }
            else
            {
                parcel_mgr.mWestSouth = region->getPosGlobalFromRegion( aabb_min );
                parcel_mgr.mEastNorth = region->getPosGlobalFromRegion( aabb_max );

                // Owned land, highlight the boundaries
                S32 bitmap_size =   parcel_mgr.mParcelsPerEdge
                                    * parcel_mgr.mParcelsPerEdge
                                    / 8;
                U8* bitmap = new U8[ bitmap_size ];
                msg->getBinaryDataFast(_PREHASH_ParcelData, _PREHASH_Bitmap, bitmap, bitmap_size);

                parcel_mgr.resetSegments(parcel_mgr.mHighlightSegments);
                parcel_mgr.writeSegmentsFromBitmap( bitmap, parcel_mgr.mHighlightSegments );

                delete[] bitmap;
                bitmap = NULL;

                parcel_mgr.mCurrentParcelSelection->mWholeParcelSelected = true;
            }

            // Request access list information for this land
            parcel_mgr.sendParcelAccessListRequest(AL_ACCESS | AL_BAN | AL_ALLOW_EXPERIENCE | AL_BLOCK_EXPERIENCE);

            // Request dwell for this land, if it's not public land.
            parcel_mgr.mSelectedDwell = DWELL_NAN;
            if (0 != local_id)
            {
                parcel_mgr.sendParcelDwellRequest();
            }

            parcel_mgr.mSelected = true;
            parcel_mgr.notifyObservers();
        }
    }
    else if (sequence_id == COLLISION_NOT_IN_GROUP_PARCEL_SEQ_ID ||
             sequence_id == COLLISION_NOT_ON_LIST_PARCEL_SEQ_ID  ||
             sequence_id == COLLISION_BANNED_PARCEL_SEQ_ID)
    {
        // We're about to collide with this parcel
        static LLCachedControl<S32> ban_lines_mode(gSavedSettings , "ShowBanLines" , PARCEL_BAN_LINES_ON_COLLISION);
        if (ban_lines_mode == PARCEL_BAN_LINES_ON_PROXIMITY)
        {
            parcel_mgr.resetCollisionTimer();
        }

        // Differentiate this parcel if we are banned from it.
        if (sequence_id == COLLISION_BANNED_PARCEL_SEQ_ID)
        {
            parcel_mgr.mCollisionBanned = BA_BANNED;
        }
        else if (sequence_id == COLLISION_NOT_IN_GROUP_PARCEL_SEQ_ID)
        {
            parcel_mgr.mCollisionBanned = BA_NOT_IN_GROUP;
        }
        else
        {
            parcel_mgr.mCollisionBanned = BA_NOT_ON_LIST;

        }

        S32 bitmap_size =   parcel_mgr.mParcelsPerEdge
                            * parcel_mgr.mParcelsPerEdge
                            / 8;
        U8* bitmap = new U8[ bitmap_size ];
        msg->getBinaryDataFast(_PREHASH_ParcelData, _PREHASH_Bitmap, bitmap, bitmap_size);

        parcel_mgr.resetSegments(parcel_mgr.mCollisionSegments);
        parcel_mgr.writeSegmentsFromBitmap( bitmap, parcel_mgr.mCollisionSegments );

        delete[] bitmap;
        bitmap = NULL;

    }
    else if (sequence_id == HOVERED_PARCEL_SEQ_ID)
    {
        LLViewerRegion *region = LLWorld::getInstance()->getRegion( msg->getSender() );
        if (region)
        {
            parcel_mgr.mHoverWestSouth = region->getPosGlobalFromRegion( aabb_min );
            parcel_mgr.mHoverEastNorth = region->getPosGlobalFromRegion( aabb_max );
        }
        else
        {
            parcel_mgr.mHoverWestSouth.clearVec();
            parcel_mgr.mHoverEastNorth.clearVec();
        }
    }
    else
    {
        if (gNonInteractive)
        {
            return;
        }

        // Check for video
        LLViewerParcelMedia::getInstance()->update(parcel);

        // Then check for music
        if (gAudiop)
        {
            if (parcel)
            {
                // Only update stream if parcel changed (recreated) or music is playing (enabled)
                static LLCachedControl<bool> already_playing(gSavedSettings, "MediaTentativeAutoPlay", true);
                if (!agent_parcel_update || already_playing)
                {
                    LLViewerParcelAskPlay::getInstance()->cancelNotification();
                    std::string music_url_raw = parcel->getMusicURL();

                    // Trim off whitespace from front and back
                    std::string music_url = music_url_raw;
                    LLStringUtil::trim(music_url);

                    // If there is a new music URL and it's valid, play it.
                    if (music_url.size() > 12)
                    {
                        if (music_url.substr(0, 7) == "http://"
                            || music_url.substr(0, 8) == "https://")
                        {
                            LLViewerRegion *region = LLWorld::getInstance()->getRegion(msg->getSender());
                            if (region)
                            {
                                optionallyStartMusic(music_url, parcel->mLocalID, region->getRegionID(), !agent_parcel_update);
                            }
                        }
                        else
                        {
                            LL_INFOS("ParcelMgr") << "Stopping parcel music (invalid audio stream URL)" << LL_ENDL;
                            // clears the URL
                            // null value causes fade out
                            LLViewerAudio::getInstance()->startInternetStreamWithAutoFade(LLStringUtil::null);
                        }
                    }
                    else if (!gAudiop->getInternetStreamURL().empty())
                    {
                        LL_INFOS("ParcelMgr") << "Stopping parcel music (parcel stream URL is empty)" << LL_ENDL;
                        // null value causes fade out
                        LLViewerAudio::getInstance()->startInternetStreamWithAutoFade(LLStringUtil::null);
                    }
                }
            }
            else
            {
                // Public land has no music
                LLViewerParcelAskPlay::getInstance()->cancelNotification();
                LLViewerAudio::getInstance()->stopInternetStreamWithAutoFade();
            }
        }//if gAudiop
    };
}

//static
void LLViewerParcelMgr::onStartMusicResponse(const LLUUID &region_id, const S32 &parcel_id, const std::string &url, const bool &play)
{
    if (play)
    {
        LL_INFOS("ParcelMgr") << "Starting parcel music " << url << LL_ENDL;
        LLViewerAudio::getInstance()->startInternetStreamWithAutoFade(url);
    }
    else
    {
        LLViewerAudio::getInstance()->startInternetStreamWithAutoFade(LLStringUtil::null);
    }
}

void LLViewerParcelMgr::optionallyStartMusic(const std::string &music_url, const S32 &local_id, const LLUUID &region_id, bool switched_parcel)
{
    static LLCachedControl<bool> streaming_music(gSavedSettings, "AudioStreamingMusic", true);
    if (streaming_music)
    {
        static LLCachedControl<S32> autoplay_mode(gSavedSettings, "ParcelMediaAutoPlayEnable", 1);
        static LLCachedControl<bool> tentative_autoplay(gSavedSettings, "MediaTentativeAutoPlay", true);
        // only play music when you enter a new parcel if the UI control for this
        // was not *explicitly* stopped by the user. (part of SL-4878)
        LLPanelNearByMedia* nearby_media_panel = gStatusBar ? gStatusBar->getNearbyMediaPanel() : NULL;
        LLViewerAudio* viewer_audio = LLViewerAudio::getInstance();

        // ask mode //todo constants
        if (autoplay_mode == 2)
        {
            // if user set media to play - ask
            if ((nearby_media_panel && nearby_media_panel->getParcelAudioAutoStart())
                || (!nearby_media_panel && tentative_autoplay))
            {
                // user did not stop audio
                if (switched_parcel || music_url != viewer_audio->getNextStreamURI())
                {
                    viewer_audio->startInternetStreamWithAutoFade(LLStringUtil::null);

                    LLViewerParcelAskPlay::getInstance()->askToPlay(region_id,
                        local_id,
                        music_url,
                        onStartMusicResponse);
                }
                // else do nothing:
                // Parcel properties changed, but not url.
                // We are already playing this url and asked about it when agent entered parcel
                // or user started audio manually at some point
            }
            else
            {
                // stopped by the user, do not autoplay
                LLViewerParcelAskPlay::getInstance()->cancelNotification();
                viewer_audio->startInternetStreamWithAutoFade(LLStringUtil::null);
            }
        }
        // autoplay
        else if ((nearby_media_panel
                  && nearby_media_panel->getParcelAudioAutoStart())
                  // or they have expressed no opinion in the UI, but have autoplay on...
                 || (!nearby_media_panel
                     && autoplay_mode == 1
                     && tentative_autoplay))
        {
            LL_INFOS("ParcelMgr") << "Starting parcel music " << music_url << LL_ENDL;
            viewer_audio->startInternetStreamWithAutoFade(music_url);
        }
        // autoplay off
        else if(switched_parcel || music_url != viewer_audio->getNextStreamURI())
        {
            viewer_audio->startInternetStreamWithAutoFade(LLStringUtil::null);
        }
    }
}

// static
void LLViewerParcelMgr::processParcelAccessListReply(LLMessageSystem *msg, void **user)
{
    LLUUID agent_id;
    S32 sequence_id = 0;
    U32 message_flags = 0x0;
    S32 parcel_id = -1;

    msg->getUUIDFast(_PREHASH_Data, _PREHASH_AgentID, agent_id);
    msg->getS32Fast( _PREHASH_Data, _PREHASH_SequenceID, sequence_id ); //ignored
    msg->getU32Fast( _PREHASH_Data, _PREHASH_Flags, message_flags);
    msg->getS32Fast( _PREHASH_Data, _PREHASH_LocalID, parcel_id);

    LLParcel* parcel = LLViewerParcelMgr::getInstance()->mCurrentParcel;
    if (!parcel) return;

    if (parcel_id != parcel->getLocalID())
    {
        LL_WARNS_ONCE("ParcelMgr") << "processParcelAccessListReply for parcel " << parcel_id
            << " which isn't the selected parcel " << parcel->getLocalID()<< LL_ENDL;
        return;
    }

    if (message_flags & AL_ACCESS)
    {
        parcel->unpackAccessEntries(msg, &(parcel->mAccessList) );
    }
    else if (message_flags & AL_BAN)
    {
        parcel->unpackAccessEntries(msg, &(parcel->mBanList) );
    }
    else if (message_flags & AL_ALLOW_EXPERIENCE)
    {
        parcel->unpackExperienceEntries(msg, EXPERIENCE_KEY_TYPE_ALLOWED);
    }
    else if (message_flags & AL_BLOCK_EXPERIENCE)
    {
        parcel->unpackExperienceEntries(msg, EXPERIENCE_KEY_TYPE_BLOCKED);
    }
    /*else if (message_flags & AL_RENTER)
    {
        parcel->unpackAccessEntries(msg, &(parcel->mRenterList) );
    }*/

    LLViewerParcelMgr::getInstance()->notifyObservers();
}


// static
void LLViewerParcelMgr::processParcelDwellReply(LLMessageSystem* msg, void**)
{
    LLUUID agent_id;
    msg->getUUID("AgentData", "AgentID", agent_id);

    S32 local_id;
    msg->getS32("Data", "LocalID", local_id);

    LLUUID parcel_id;
    msg->getUUID("Data", "ParcelID", parcel_id);

    F32 dwell;
    msg->getF32("Data", "Dwell", dwell);

    if (local_id == LLViewerParcelMgr::getInstance()->mCurrentParcel->getLocalID())
    {
        LLViewerParcelMgr::getInstance()->mSelectedDwell = dwell;
        LLViewerParcelMgr::getInstance()->notifyObservers();
    }
}


void LLViewerParcelMgr::sendParcelAccessListUpdate(U32 which)
{
    if (!mSelected)
    {
        return;
    }

    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal( mWestSouth );
    if (!region) return;

    LLParcel* parcel = mCurrentParcel;
    if (!parcel) return;

    if (which & AL_ACCESS)
    {
        sendParcelAccessListUpdate(AL_ACCESS, parcel->mAccessList, region, parcel->getLocalID());
    }

    if (which & AL_BAN)
    {
        sendParcelAccessListUpdate(AL_BAN, parcel->mBanList, region, parcel->getLocalID());
    }

    if(which & AL_ALLOW_EXPERIENCE)
    {
        sendParcelAccessListUpdate(AL_ALLOW_EXPERIENCE, parcel->getExperienceKeysByType(EXPERIENCE_KEY_TYPE_ALLOWED), region, parcel->getLocalID());
    }
    if(which & AL_BLOCK_EXPERIENCE)
    {
        sendParcelAccessListUpdate(AL_BLOCK_EXPERIENCE, parcel->getExperienceKeysByType(EXPERIENCE_KEY_TYPE_BLOCKED), region, parcel->getLocalID());
    }
}

void LLViewerParcelMgr::sendParcelAccessListUpdate(U32 flags, const LLAccessEntry::map& entries, LLViewerRegion* region, S32 parcel_local_id)
{
    S32 count = entries.size();
    S32 num_sections = (S32) ceil(count/PARCEL_MAX_ENTRIES_PER_PACKET);
    S32 sequence_id = 1;
    bool start_message = true;
    bool initial = true;

    LLUUID transactionUUID;
    transactionUUID.generate();


    LLMessageSystem* msg = gMessageSystem;

    LLAccessEntry::map::const_iterator cit = entries.begin();
    LLAccessEntry::map::const_iterator  end = entries.end();
    while ( (cit != end) || initial )
    {
        if (start_message)
        {
            msg->newMessageFast(_PREHASH_ParcelAccessListUpdate);
            msg->nextBlockFast(_PREHASH_AgentData);
            msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID() );
            msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID() );
            msg->nextBlockFast(_PREHASH_Data);
            msg->addU32Fast(_PREHASH_Flags, flags);
            msg->addS32(_PREHASH_LocalID,  parcel_local_id);
            msg->addUUIDFast(_PREHASH_TransactionID, transactionUUID);
            msg->addS32Fast(_PREHASH_SequenceID, sequence_id);
            msg->addS32Fast(_PREHASH_Sections, num_sections);
            start_message = false;

            if (initial && (cit == end))
            {
                // pack an empty block if there will be no data
                msg->nextBlockFast(_PREHASH_List);
                msg->addUUIDFast(_PREHASH_ID,  LLUUID::null );
                msg->addS32Fast(_PREHASH_Time, 0 );
                msg->addU32Fast(_PREHASH_Flags, 0 );
            }

            initial = false;
            sequence_id++;

        }

        while ( (cit != end) && (msg->getCurrentSendTotal() < MTUBYTES))
        {
            const LLAccessEntry& entry = (*cit).second;

            msg->nextBlockFast(_PREHASH_List);
            msg->addUUIDFast(_PREHASH_ID,  entry.mID );
            msg->addS32Fast(_PREHASH_Time, entry.mTime );
            msg->addU32Fast(_PREHASH_Flags, entry.mFlags );
            ++cit;
        }

        start_message = true;
        msg->sendReliable( region->getHost() );
    }
}


void LLViewerParcelMgr::deedLandToGroup()
{
    std::string group_name;
    gCacheName->getGroupName(mCurrentParcel->getGroupID(), group_name);
    LLSD args;
    args["AREA"] = llformat("%d", mCurrentParcel->getArea());
    args["GROUP_NAME"] = group_name;
    if(mCurrentParcel->getContributeWithDeed())
    {
        args["NAME"] = LLSLURL("agent", mCurrentParcel->getOwnerID(), "completename").getSLURLString();
        LLNotificationsUtil::add("DeedLandToGroupWithContribution",args, LLSD(), deedAlertCB);
    }
    else
    {
        LLNotificationsUtil::add("DeedLandToGroup",args, LLSD(), deedAlertCB);
    }
}

// static
bool LLViewerParcelMgr::deedAlertCB(const LLSD& notification, const LLSD& response)
{
    S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
    if (option == 0)
    {
        LLParcel* parcel = LLViewerParcelMgr::getInstance()->getParcelSelection()->getParcel();
        LLUUID group_id;
        if(parcel)
        {
            group_id = parcel->getGroupID();
        }
        LLViewerParcelMgr::getInstance()->sendParcelDeed(group_id);
    }
    return false;
}


void LLViewerParcelMgr::startReleaseLand()
{
    if (!mSelected)
    {
        LLNotificationsUtil::add("CannotReleaseLandNothingSelected");
        return;
    }

    if (mRequestResult == PARCEL_RESULT_NO_DATA)
    {
        LLNotificationsUtil::add("CannotReleaseLandWatingForServer");
        return;
    }

    if (mRequestResult == PARCEL_RESULT_MULTIPLE)
    {
        LLNotificationsUtil::add("CannotReleaseLandSelected");
        return;
    }

    if (!isParcelOwnedByAgent(mCurrentParcel, GP_LAND_RELEASE)
        && !(gAgent.canManageEstate()))
    {
        LLNotificationsUtil::add("CannotReleaseLandDontOwn");
        return;
    }

    LLVector3d parcel_center = (mWestSouth + mEastNorth) / 2.0;
    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal(parcel_center);
    if (!region)
    {
        LLNotificationsUtil::add("CannotReleaseLandRegionNotFound");
        return;
    }
/*
    if (region->getRegionFlag(REGION_FLAGS_BLOCK_LAND_RESELL)
        && !gAgent.isGodlike())
    {
        LLSD args;
        args["REGION"] = region->getName();
        LLNotificationsUtil::add("CannotReleaseLandNoTransfer", args);
        return;
    }
*/

    if (!mCurrentParcelSelection->mWholeParcelSelected)
    {
        LLNotificationsUtil::add("CannotReleaseLandPartialSelection");
        return;
    }

    // Compute claim price
    LLSD args;
    args["AREA"] = llformat("%d",mCurrentParcel->getArea());
    LLNotificationsUtil::add("ReleaseLandWarning", args, LLSD(), releaseAlertCB);
}

bool LLViewerParcelMgr::canAgentBuyParcel(LLParcel* parcel, bool forGroup) const
{
    if (!parcel)
    {
        return false;
    }

    if (mSelected  &&  parcel == mCurrentParcel)
    {
        if (mRequestResult == PARCEL_RESULT_NO_DATA)
        {
            return false;
        }
    }

    const LLUUID& parcelOwner = parcel->getOwnerID();
    const LLUUID& authorizeBuyer = parcel->getAuthorizedBuyerID();

    if (parcel->isPublic())
    {
        return true;    // change this if want to make it gods only
    }

    LLVector3 parcel_coord = parcel->getCenterpoint();
    LLViewerRegion* regionp = LLWorld::getInstance()->getRegionFromPosAgent(parcel_coord);
    if (regionp)
    {
        U8 sim_access = regionp->getSimAccess();
        const LLAgentAccess& agent_access = gAgent.getAgentAccess();
        // if the region is PG, we're happy already, so do nothing
        // but if we're set to avoid either mature or adult, get us outta here
        if ((sim_access == SIM_ACCESS_MATURE) &&
            !agent_access.canAccessMature())
        {
            return false;
        }
        else if ((sim_access == SIM_ACCESS_ADULT) &&
                 !agent_access.canAccessAdult())
        {
            return false;
        }
    }

    bool isForSale = parcel->getForSale()
            && ((parcel->getSalePrice() > 0) || (authorizeBuyer.notNull()));

    bool isEmpowered
        = forGroup ? gAgent.hasPowerInActiveGroup(GP_LAND_DEED) : true;

    bool isOwner
        = parcelOwner == (forGroup ? gAgent.getGroupID() : gAgent.getID());

    bool isAuthorized
            = (authorizeBuyer.isNull()
                || (gAgent.getID() == authorizeBuyer)
                || (gAgent.hasPowerInGroup(authorizeBuyer,GP_LAND_DEED)
                    && gAgent.hasPowerInGroup(authorizeBuyer,GP_LAND_SET_SALE_INFO)));

    return isForSale && !isOwner && isAuthorized  && isEmpowered;
}


void LLViewerParcelMgr::startBuyLand(bool is_for_group)
{
    LLFloaterBuyLand::buyLand(getSelectionRegion(), mCurrentParcelSelection, is_for_group);
}

void LLViewerParcelMgr::startSellLand()
{
    LLFloaterSellLand::sellLand(getSelectionRegion(), mCurrentParcelSelection);
}

void LLViewerParcelMgr::startDivideLand()
{
    if (!mSelected)
    {
        LLNotificationsUtil::add("CannotDivideLandNothingSelected");
        return;
    }

    if (mCurrentParcelSelection->mWholeParcelSelected)
    {
        LLNotificationsUtil::add("CannotDivideLandPartialSelection");
        return;
    }

    LLSD payload;
    payload["west_south_border"] = ll_sd_from_vector3d(mWestSouth);
    payload["east_north_border"] = ll_sd_from_vector3d(mEastNorth);

    LLNotificationsUtil::add("LandDivideWarning", LLSD(), payload, callbackDivideLand);
}

// static
bool LLViewerParcelMgr::callbackDivideLand(const LLSD& notification, const LLSD& response)
{
    S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
    LLVector3d west_south_d = ll_vector3d_from_sd(notification["payload"]["west_south_border"]);
    LLVector3d east_north_d = ll_vector3d_from_sd(notification["payload"]["east_north_border"]);
    LLVector3d parcel_center = (west_south_d + east_north_d) / 2.0;

    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal(parcel_center);
    if (!region)
    {
        LLNotificationsUtil::add("CannotDivideLandNoRegion");
        return false;
    }

    if (0 == option)
    {
        LLVector3 west_south = region->getPosRegionFromGlobal(west_south_d);
        LLVector3 east_north = region->getPosRegionFromGlobal(east_north_d);

        LLMessageSystem* msg = gMessageSystem;
        msg->newMessage("ParcelDivide");
        msg->nextBlock("AgentData");
        msg->addUUID("AgentID", gAgent.getID());
        msg->addUUID("SessionID", gAgent.getSessionID());
        msg->nextBlock("ParcelData");
        msg->addF32("West", west_south.mV[VX]);
        msg->addF32("South", west_south.mV[VY]);
        msg->addF32("East", east_north.mV[VX]);
        msg->addF32("North", east_north.mV[VY]);
        msg->sendReliable(region->getHost());
    }
    return false;
}


void LLViewerParcelMgr::startJoinLand()
{
    if (!mSelected)
    {
        LLNotificationsUtil::add("CannotJoinLandNothingSelected");
        return;
    }

    if (mCurrentParcelSelection->mWholeParcelSelected)
    {
        LLNotificationsUtil::add("CannotJoinLandEntireParcelSelected");
        return;
    }

    if (!mCurrentParcelSelection->mSelectedMultipleOwners)
    {
        LLNotificationsUtil::add("CannotJoinLandSelection");
        return;
    }

    LLSD payload;
    payload["west_south_border"] = ll_sd_from_vector3d(mWestSouth);
    payload["east_north_border"] = ll_sd_from_vector3d(mEastNorth);

    LLNotificationsUtil::add("JoinLandWarning", LLSD(), payload, callbackJoinLand);
}

// static
bool LLViewerParcelMgr::callbackJoinLand(const LLSD& notification, const LLSD& response)
{
    S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
    LLVector3d west_south_d = ll_vector3d_from_sd(notification["payload"]["west_south_border"]);
    LLVector3d east_north_d = ll_vector3d_from_sd(notification["payload"]["east_north_border"]);
    LLVector3d parcel_center = (west_south_d + east_north_d) / 2.0;

    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal(parcel_center);
    if (!region)
    {
        LLNotificationsUtil::add("CannotJoinLandNoRegion");
        return false;
    }

    if (0 == option)
    {
        LLVector3 west_south = region->getPosRegionFromGlobal(west_south_d);
        LLVector3 east_north = region->getPosRegionFromGlobal(east_north_d);

        LLMessageSystem* msg = gMessageSystem;
        msg->newMessage("ParcelJoin");
        msg->nextBlock("AgentData");
        msg->addUUID("AgentID", gAgent.getID());
        msg->addUUID("SessionID", gAgent.getSessionID());
        msg->nextBlock("ParcelData");
        msg->addF32("West", west_south.mV[VX]);
        msg->addF32("South", west_south.mV[VY]);
        msg->addF32("East", east_north.mV[VX]);
        msg->addF32("North", east_north.mV[VY]);
        msg->sendReliable(region->getHost());
    }
    return false;
}


void LLViewerParcelMgr::startDeedLandToGroup()
{
    if (!mSelected || !mCurrentParcel)
    {
        LLNotificationsUtil::add("CannotDeedLandNothingSelected");
        return;
    }

    if (mRequestResult == PARCEL_RESULT_NO_DATA)
    {
        LLNotificationsUtil::add("CannotDeedLandWaitingForServer");
        return;
    }

    if (mRequestResult == PARCEL_RESULT_MULTIPLE)
    {
        LLNotificationsUtil::add("CannotDeedLandMultipleSelected");
        return;
    }

    LLVector3d parcel_center = (mWestSouth + mEastNorth) / 2.0;
    LLViewerRegion* region = LLWorld::getInstance()->getRegionFromPosGlobal(parcel_center);
    if (!region)
    {
        LLNotificationsUtil::add("CannotDeedLandNoRegion");
        return;
    }

    /*
    if(!gAgent.isGodlike())
    {
        if(region->getRegionFlag(REGION_FLAGS_BLOCK_LAND_RESELL)
            && (mCurrentParcel->getOwnerID() != region->getOwner()))
        {
            LLSD args;
            args["REGION"] = region->getName();
            LLNotificationsUtil::add("CannotDeedLandNoTransfer", args);
            return;
        }
    }
    */

    deedLandToGroup();
}
void LLViewerParcelMgr::reclaimParcel()
{
    LLParcel* parcel = LLViewerParcelMgr::getInstance()->getParcelSelection()->getParcel();
    LLViewerRegion* regionp = LLViewerParcelMgr::getInstance()->getSelectionRegion();
    if(parcel && parcel->getOwnerID().notNull()
       && (parcel->getOwnerID() != gAgent.getID())
       && regionp && (regionp->getOwner() == gAgent.getID()))
    {
        LLMessageSystem* msg = gMessageSystem;
        msg->newMessage("ParcelReclaim");
        msg->nextBlock("AgentData");
        msg->addUUID("AgentID", gAgent.getID());
        msg->addUUID("SessionID", gAgent.getSessionID());
        msg->nextBlock("Data");
        msg->addS32("LocalID", parcel->getLocalID());
        msg->sendReliable(regionp->getHost());
    }
}

// static
bool LLViewerParcelMgr::releaseAlertCB(const LLSD& notification, const LLSD& response)
{
    S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
    if (option == 0)
    {
        // Send the release message, not a force
        LLViewerParcelMgr::getInstance()->sendParcelRelease();
    }
    return false;
}

void LLViewerParcelMgr::buyPass()
{
    LLParcel* parcel = getParcelSelection()->getParcel();
    if (!parcel) return;

    LLViewerRegion* region = getSelectionRegion();
    if (!region) return;

    LLMessageSystem* msg = gMessageSystem;
    msg->newMessageFast(_PREHASH_ParcelBuyPass);
    msg->nextBlock("AgentData");
    msg->addUUID("AgentID", gAgent.getID());
    msg->addUUID("SessionID", gAgent.getSessionID());
    msg->nextBlockFast(_PREHASH_ParcelData);
    msg->addS32Fast(_PREHASH_LocalID, parcel->getLocalID() );
    msg->sendReliable( region->getHost() );
}

//Tells whether we are allowed to buy a pass or not
bool LLViewerParcelMgr::isCollisionBanned()
{
    if ((mCollisionBanned == BA_ALLOWED) || (mCollisionBanned == BA_NOT_ON_LIST) || (mCollisionBanned == BA_NOT_IN_GROUP))
        return false;
    else
        return true;
}

// This implementation should mirror LLSimParcelMgr::isParcelOwnedBy
// static
bool LLViewerParcelMgr::isParcelOwnedByAgent(const LLParcel* parcelp, U64 group_proxy_power)
{
    if (!parcelp)
    {
        return false;
    }

    // Gods can always assume ownership.
    if (gAgent.isGodlike())
    {
        return true;
    }

    // The owner of a parcel automatically gets all powersr.
    if (parcelp->getOwnerID() == gAgent.getID())
    {
        return true;
    }

    // Only gods can assume 'ownership' of public land.
    if (parcelp->isPublic())
    {
        return false;
    }

    // Return whether or not the agent has group_proxy_power powers in the
    // parcel's group.
    return gAgent.hasPowerInGroup(parcelp->getOwnerID(), group_proxy_power);
}

// This implementation should mirror llSimParcelMgr::isParcelModifiableBy
// static
bool LLViewerParcelMgr::isParcelModifiableByAgent(const LLParcel* parcelp, U64 group_proxy_power)
{
    // If the agent can assume ownership, it is probably modifiable.
    bool rv = false;
    if (parcelp)
    {
        // *NOTE: This should only work for leased parcels, but group owned
        // parcels cannot be OS_LEASED yet. Phoenix 2003-12-15.
        rv = isParcelOwnedByAgent(parcelp, group_proxy_power);

        // ... except for the case that the parcel is not OS_LEASED for agent-owned parcels.
        if( (gAgent.getID() == parcelp->getOwnerID())
            && !gAgent.isGodlike()
            && (parcelp->getOwnershipStatus() != LLParcel::OS_LEASED) )
        {
            rv = false;
        }
    }
    return rv;
}

void sanitize_corners(const LLVector3d &corner1,
                                        const LLVector3d &corner2,
                                        LLVector3d &west_south_bottom,
                                        LLVector3d &east_north_top)
{
    west_south_bottom.mdV[VX] = llmin( corner1.mdV[VX], corner2.mdV[VX] );
    west_south_bottom.mdV[VY] = llmin( corner1.mdV[VY], corner2.mdV[VY] );
    west_south_bottom.mdV[VZ] = llmin( corner1.mdV[VZ], corner2.mdV[VZ] );

    east_north_top.mdV[VX] = llmax( corner1.mdV[VX], corner2.mdV[VX] );
    east_north_top.mdV[VY] = llmax( corner1.mdV[VY], corner2.mdV[VY] );
    east_north_top.mdV[VZ] = llmax( corner1.mdV[VZ], corner2.mdV[VZ] );
}


void LLViewerParcelMgr::cleanupGlobals()
{
}

LLViewerTexture* LLViewerParcelMgr::getBlockedImage() const
{
    return sBlockedImage;
}

LLViewerTexture* LLViewerParcelMgr::getPassImage() const
{
    return sPassImage;
}

/*
 * Set finish teleport callback. You can use it to observe all  teleport events.
 * NOTE:
 * After local( in one region) teleports we
 *  cannot rely on gAgent.getPositionGlobal(),
 *  so the new position gets passed explicitly.
 *  Use args of this callback to get global position of avatar after teleport event.
 */
boost::signals2::connection LLViewerParcelMgr::setTeleportFinishedCallback(teleport_finished_callback_t cb)
{
    return mTeleportFinishedSignal.connect(cb);
}

boost::signals2::connection LLViewerParcelMgr::setTeleportFailedCallback(teleport_failed_callback_t cb)
{
    return mTeleportFailedSignal.connect(cb);
}

/* Ok, we're notified that teleport has been finished.
 * We should now propagate the notification via mTeleportFinishedSignal
 * to all interested parties.
 */
void LLViewerParcelMgr::onTeleportFinished(bool local, const LLVector3d& new_pos)
{
    // Treat only teleports within the same parcel as local (EXT-3139).
    if (local && LLViewerParcelMgr::getInstance()->inAgentParcel(new_pos))
    {
        // Local teleport. We already have the agent parcel data.
        // Emit the signal immediately.
        getInstance()->mTeleportFinishedSignal(new_pos, local);
    }
    else
    {
        // Non-local teleport (inter-region or between different parcels of the same region).
        // The agent parcel data has not been updated yet.
        // Let's wait for the update and then emit the signal.
        mTeleportInProgressPosition = new_pos;
        mTeleportInProgress = true;
    }
}

void LLViewerParcelMgr::onTeleportFailed()
{
    mTeleportFailedSignal();
}

bool  LLViewerParcelMgr::getTeleportInProgress()
{
    return mTeleportInProgress // case where parcel data arrives after teleport
        || gAgent.getTeleportState() > LLAgent::TELEPORT_NONE; // For LOCAL, no mTeleportInProgress
}