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/**
 * @file llhudmanager.cpp
 * @brief LLHUDManager class implementation
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * 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 "llhudmanager.h"

#include "message.h"
#include "object_flags.h"

#include "llagent.h"
#include "llhudeffect.h"
#include "pipeline.h"
#include "llui.h"
#include "llviewercontrol.h"
#include "llviewerobjectlist.h"

// These are loaded from saved settings.
LLColor4 LLHUDManager::sParentColor;
LLColor4 LLHUDManager::sChildColor;

LLHUDManager::LLHUDManager()
{

    LLHUDManager::sParentColor = LLUIColorTable::instance().getColor("FocusColor");
    // rdw commented out since it's not used.  Also removed from colors_base.xml
    //LLHUDManager::sChildColor =LLUIColorTable::instance().getColor("FocusSecondaryColor");
}

LLHUDManager::~LLHUDManager()
{
}

static LLTrace::BlockTimerStatHandle FTM_UPDATE_HUD_EFFECTS("Update Hud Effects");

void LLHUDManager::updateEffects()
{
    LL_RECORD_BLOCK_TIME(FTM_UPDATE_HUD_EFFECTS);
    S32 i;
    for (i = 0; i < mHUDEffects.size(); i++)
    {
        LLHUDEffect *hep = mHUDEffects[i];
        if (hep->isDead())
        {
            continue;
        }
        hep->update();
    }
}

void LLHUDManager::sendEffects()
{
    S32 i;
    for (i = 0; i < mHUDEffects.size(); i++)
    {
        LLHUDEffect *hep = mHUDEffects[i];
        if (hep->isDead())
        {
            LL_WARNS() << "Trying to send dead effect!" << LL_ENDL;
            continue;
        }
        if (hep->mType < LLHUDObject::LL_HUD_EFFECT_BEAM)
        {
            LL_WARNS() << "Trying to send effect of type " << hep->mType << " which isn't really an effect and shouldn't be in this list!" << LL_ENDL;
            continue;
        }
        if (hep->getNeedsSendToSim() && hep->getOriginatedHere())
        {
            LLMessageSystem* msg = gMessageSystem;
            msg->newMessageFast(_PREHASH_ViewerEffect);
            msg->nextBlockFast(_PREHASH_AgentData);
            msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
            msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
            msg->nextBlockFast(_PREHASH_Effect);
            hep->packData(msg);
            hep->setNeedsSendToSim(FALSE);
            gAgent.sendMessage();
        }
    }
}

//static
void LLHUDManager::shutdownClass()
{
    getInstance()->mHUDEffects.clear();
}

void LLHUDManager::cleanupEffects()
{
    S32 i = 0;

    while (i < mHUDEffects.size())
    {
        if (mHUDEffects[i]->isDead())
        {
            mHUDEffects.erase(mHUDEffects.begin() + i);
        }
        else
        {
            i++;
        }
    }
}

LLHUDEffect *LLHUDManager::createViewerEffect(const U8 type, BOOL send_to_sim, BOOL originated_here)
{
    // SJB: DO NOT USE addHUDObject!!! Not all LLHUDObjects are LLHUDEffects!
    LLHUDEffect *hep = LLHUDObject::addHUDEffect(type);
    if (!hep)
    {
        return NULL;
    }

    LLUUID tmp;
    tmp.generate();
    hep->setID(tmp);
    hep->setNeedsSendToSim(send_to_sim);
    hep->setOriginatedHere(originated_here);

    mHUDEffects.push_back(hep);
    return hep;
}


//static
void LLHUDManager::processViewerEffect(LLMessageSystem *mesgsys, void **user_data)
{
    LLHUDEffect *effectp = NULL;
    LLUUID effect_id;
    U8 effect_type = 0;
    S32 number_blocks = mesgsys->getNumberOfBlocksFast(_PREHASH_Effect);
    S32 k;

    for (k = 0; k < number_blocks; k++)
    {
        effectp = NULL;
        LLHUDEffect::getIDType(mesgsys, k, effect_id, effect_type);
        S32 i;
        for (i = 0; i < LLHUDManager::getInstance()->mHUDEffects.size(); i++)
        {
            LLHUDEffect *cur_effectp = LLHUDManager::getInstance()->mHUDEffects[i];
            if (!cur_effectp)
            {
                LL_WARNS() << "Null effect in effect manager, skipping" << LL_ENDL;
                LLHUDManager::getInstance()->mHUDEffects.erase(LLHUDManager::getInstance()->mHUDEffects.begin() + i);
                i--;
                continue;
            }
            if (cur_effectp->isDead())
            {
    //          LL_WARNS() << "Dead effect in effect manager, removing" << LL_ENDL;
                LLHUDManager::getInstance()->mHUDEffects.erase(LLHUDManager::getInstance()->mHUDEffects.begin() + i);
                i--;
                continue;
            }
            if (cur_effectp->getID() == effect_id)
            {
                if (cur_effectp->getType() != effect_type)
                {
                    LL_WARNS() << "Viewer effect update doesn't match old type!" << LL_ENDL;
                }
                effectp = cur_effectp;
                break;
            }
        }

        if (effect_type)
        {
            if (!effectp)
            {
                effectp = LLHUDManager::getInstance()->createViewerEffect(effect_type, FALSE, FALSE);
            }

            if (effectp)
            {
                effectp->unpackData(mesgsys, k);
            }
        }
        else
        {
            LL_WARNS() << "Received viewer effect of type " << effect_type << " which isn't really an effect!" << LL_ENDL;
        }
    }

    //LL_INFOS() << "Got viewer effect: " << effect_id << LL_ENDL;
}