/**
 * @file llimpanel.cpp
 * @brief LLIMPanel class definition
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * 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 "llimpanel.h"

#include "indra_constants.h"
#include "llfloaterreg.h"
#include "llfocusmgr.h"
#include "llfontgl.h"
#include "llrect.h"
#include "llerror.h"
#include "llmultifloater.h"
#include "llstring.h"
#include "message.h"
#include "lltextbox.h"

#include "llagent.h"
#include "llbutton.h"
#include "llcallingcard.h"
#include "llchannelmanager.h"
#include "llchat.h"
#include "llchiclet.h"
#include "llconsole.h"
#include "llgroupactions.h"
#include "llfloater.h"
#include "llfloateractivespeakers.h"
#include "llavataractions.h"
#include "llinventory.h"
#include "llinventorymodel.h"
#include "llfloaterinventory.h"
#include "lliconctrl.h"
#include "llkeyboard.h"
#include "lllineeditor.h"
#include "llpanelimcontrolpanel.h"
#include "llrecentpeople.h"
#include "llresmgr.h"
#include "lltooldraganddrop.h"
#include "lltrans.h"
#include "lltabcontainer.h"
#include "llviewertexteditor.h"
#include "llviewermessage.h"
#include "llviewerstats.h"
#include "llviewercontrol.h"
#include "lluictrlfactory.h"
#include "llviewerwindow.h"
#include "llvoicechannel.h"
#include "lllogchat.h"
#include "llweb.h"
#include "llhttpclient.h"
#include "llmutelist.h"
#include "llstylemap.h"
#include "llappviewer.h"

//
// Constants
//
const S32 LINE_HEIGHT = 16;
const S32 MIN_WIDTH = 200;
const S32 MIN_HEIGHT = 130;

//
// Statics
//
//
static std::string sTitleString = "Instant Message with [NAME]";
static std::string sTypingStartString = "[NAME]: ...";
static std::string sSessionStartString = "Starting session with [NAME] please wait.";


//
// LLFloaterIMPanel
//

LLFloaterIMPanel::LLFloaterIMPanel(const std::string& session_label,
                                   const LLUUID& session_id,
                                   const LLUUID& other_participant_id,
                                   const std::vector<LLUUID>& ids,
                                   EInstantMessage dialog)
:   LLFloater(session_id),
    mInputEditor(NULL),
    mHistoryEditor(NULL),
    mSessionUUID(session_id),
    mSessionLabel(session_label),
    mSessionInitialized(FALSE),
    mSessionStartMsgPos(0),
    mOtherParticipantUUID(other_participant_id),
    mDialog(dialog),
    mSessionInitialTargetIDs(ids),
    mTyping(FALSE),
    mOtherTyping(FALSE),
    mTypingLineStartIndex(0),
    mSentTypingState(TRUE),
    mNumUnreadMessages(0),
    mShowSpeakersOnConnect(TRUE),
    mTextIMPossible(TRUE),
    mProfileButtonEnabled(TRUE),
    mCallBackEnabled(TRUE),
    mSpeakerPanel(NULL),
    mFirstKeystrokeTimer(),
    mLastKeystrokeTimer()
{
    std::string xml_filename;
    switch(mDialog)
    {
    case IM_SESSION_GROUP_START:
        mFactoryMap["active_speakers_panel"] = LLCallbackMap(createSpeakersPanel, this);
        xml_filename = "floater_instant_message_group.xml";
        break;
    case IM_SESSION_INVITE:
        mFactoryMap["active_speakers_panel"] = LLCallbackMap(createSpeakersPanel, this);
        if (gAgent.isInGroup(mSessionUUID))
        {
            xml_filename = "floater_instant_message_group.xml";
        }
        else // must be invite to ad hoc IM
        {
            xml_filename = "floater_instant_message_ad_hoc.xml";
        }
        break;
    case IM_SESSION_P2P_INVITE:
        xml_filename = "floater_instant_message.xml";
        break;
    case IM_SESSION_CONFERENCE_START:
        mFactoryMap["active_speakers_panel"] = LLCallbackMap(createSpeakersPanel, this);
        xml_filename = "floater_instant_message_ad_hoc.xml";
        break;
    // just received text from another user
    case IM_NOTHING_SPECIAL:

        xml_filename = "floater_instant_message.xml";

        mTextIMPossible = LLVoiceClient::getInstance()->isSessionTextIMPossible(mSessionUUID);
        mProfileButtonEnabled = LLVoiceClient::getInstance()->isParticipantAvatar(mSessionUUID);
        mCallBackEnabled = LLVoiceClient::getInstance()->isSessionCallBackPossible(mSessionUUID);
        break;
    default:
        LL_WARNS() << "Unknown session type" << LL_ENDL;
        xml_filename = "floater_instant_message.xml";
        break;
    }

    LLUICtrlFactory::getInstance()->buildFloater(this, xml_filename, NULL);

    setTitle(mSessionLabel);
    mInputEditor->setMaxTextLength(DB_IM_MSG_STR_LEN);
    // enable line history support for instant message bar
    mInputEditor->setEnableLineHistory(TRUE);

    //*TODO we probably need the same "awaiting message" thing in LLFloaterIMSession
    LLIMModel::LLIMSession* im_session = LLIMModel::getInstance()->findIMSession(mSessionUUID);
    if (!im_session)
    {
        llerror("im session with id " + mSessionUUID.asString() + " does not exist!", 0);
        return;
    }

    mSessionInitialized =  im_session->mSessionInitialized;
    if (!mSessionInitialized)
    {
        //locally echo a little "starting session" message
        LLUIString session_start = sSessionStartString;

        session_start.setArg("[NAME]", getTitle());
        mSessionStartMsgPos =
            mHistoryEditor->getWText().length();

        addHistoryLine(
            session_start,
            LLUIColorTable::instance().getColor("SystemChatColor"),
            false);
    }
}


LLFloaterIMPanel::~LLFloaterIMPanel()
{
    //delete focus lost callback
    mFocusCallbackConnection.disconnect();
}

BOOL LLFloaterIMPanel::postBuild()
{
    setVisibleCallback(boost::bind(&LLFloaterIMPanel::onVisibilityChange, this, _2));

    mInputEditor = getChild<LLLineEditor>("chat_editor");
    mInputEditor->setFocusReceivedCallback( boost::bind(onInputEditorFocusReceived, _1, this) );
    mFocusCallbackConnection = mInputEditor->setFocusLostCallback( boost::bind(onInputEditorFocusLost, _1, this));
    mInputEditor->setKeystrokeCallback( onInputEditorKeystroke, this );
    mInputEditor->setCommitCallback( onCommitChat, this );
    mInputEditor->setCommitOnFocusLost( FALSE );
    mInputEditor->setRevertOnEsc( FALSE );
    mInputEditor->setReplaceNewlinesWithSpaces( FALSE );

    childSetAction("profile_callee_btn", onClickProfile, this);
    childSetAction("group_info_btn", onClickGroupInfo, this);

    childSetAction("start_call_btn", onClickStartCall, this);
    childSetAction("end_call_btn", onClickEndCall, this);
    childSetAction("send_btn", onClickSend, this);
    childSetAction("toggle_active_speakers_btn", onClickToggleActiveSpeakers, this);

    childSetAction("moderator_kick_speaker", onKickSpeaker, this);
    //LLButton* close_btn = getChild<LLButton>("close_btn");
    //close_btn->setClickedCallback(&LLFloaterIMPanel::onClickClose, this);

    mHistoryEditor = getChild<LLViewerTextEditor>("im_history");

    if ( IM_SESSION_GROUP_START == mDialog )
    {
        childSetEnabled("profile_btn", FALSE);
    }

    if(!mProfileButtonEnabled)
    {
        childSetEnabled("profile_callee_btn", FALSE);
    }

    sTitleString = getString("title_string");
    sTypingStartString = getString("typing_start_string");
    sSessionStartString = getString("session_start_string");

    if (mSpeakerPanel)
    {
        mSpeakerPanel->refreshSpeakers();
    }

    if (mDialog == IM_NOTHING_SPECIAL)
    {
        childSetAction("mute_btn", onClickMuteVoice, this);
        childSetCommitCallback("speaker_volume", onVolumeChange, this);
    }

    setDefaultBtn("send_btn");
    return TRUE;
}

void* LLFloaterIMPanel::createSpeakersPanel(void* data)
{
    LLFloaterIMPanel* floaterp = (LLFloaterIMPanel*)data;
    LLIMSpeakerMgr* speaker_mgr = LLIMModel::getInstance()->getSpeakerManager(floaterp->mSessionUUID);
    floaterp->mSpeakerPanel = new LLPanelActiveSpeakers(speaker_mgr, TRUE);
    return floaterp->mSpeakerPanel;
}

//static
void LLFloaterIMPanel::onClickMuteVoice(void* user_data)
{
    LLFloaterIMPanel* floaterp = (LLFloaterIMPanel*)user_data;
    if (floaterp)
    {
        BOOL is_muted = LLMuteList::getInstance()->isMuted(floaterp->mOtherParticipantUUID, LLMute::flagVoiceChat);

        LLMute mute(floaterp->mOtherParticipantUUID, floaterp->getTitle(), LLMute::AGENT);
        if (!is_muted)
        {
            LLMuteList::getInstance()->add(mute, LLMute::flagVoiceChat);
        }
        else
        {
            LLMuteList::getInstance()->remove(mute, LLMute::flagVoiceChat);
        }
    }
}

//static
void LLFloaterIMPanel::onVolumeChange(LLUICtrl* source, void* user_data)
{
    LLFloaterIMPanel* floaterp = (LLFloaterIMPanel*)user_data;
    if (floaterp)
    {
        LLVoiceClient::getInstance()->setUserVolume(floaterp->mOtherParticipantUUID, (F32)source->getValue().asReal());
    }
}


// virtual
void LLFloaterIMPanel::draw()
{
    LLViewerRegion* region = gAgent.getRegion();

    BOOL enable_connect = (region && region->getCapability("ChatSessionRequest") != "")
                      && mSessionInitialized
                      && LLVoiceClient::getInstance()->voiceEnabled()
                      && mCallBackEnabled;

    // hide/show start call and end call buttons
    LLVoiceChannel* voice_channel = LLIMModel::getInstance()->getVoiceChannel(mSessionUUID);
    if (!voice_channel)
        return;

    childSetVisible("end_call_btn", LLVoiceClient::getInstance()->voiceEnabled() && voice_channel->getState() >= LLVoiceChannel::STATE_CALL_STARTED);
    childSetVisible("start_call_btn", LLVoiceClient::getInstance()->voiceEnabled() && voice_channel->getState() < LLVoiceChannel::STATE_CALL_STARTED);
    childSetEnabled("start_call_btn", enable_connect);
    childSetEnabled("send_btn", !childGetValue("chat_editor").asString().empty());

    LLPointer<LLSpeaker> self_speaker;
    LLIMSpeakerMgr* speaker_mgr = LLIMModel::getInstance()->getSpeakerManager(mSessionUUID);
    if (speaker_mgr)
    {
        self_speaker = speaker_mgr->findSpeaker(gAgent.getID());
    }
    if(!mTextIMPossible)
    {
        mInputEditor->setEnabled(FALSE);
        mInputEditor->setLabel(getString("unavailable_text_label"));
    }
    else if (self_speaker.notNull() && self_speaker->mModeratorMutedText)
    {
        mInputEditor->setEnabled(FALSE);
        mInputEditor->setLabel(getString("muted_text_label"));
    }
    else
    {
        mInputEditor->setEnabled(TRUE);
        mInputEditor->setLabel(getString("default_text_label"));
    }

    // show speakers window when voice first connects
    if (mShowSpeakersOnConnect && voice_channel->isActive())
    {
        childSetVisible("active_speakers_panel", TRUE);
        mShowSpeakersOnConnect = FALSE;
    }
    childSetValue("toggle_active_speakers_btn", childIsVisible("active_speakers_panel"));

    if (mTyping)
    {
        // Time out if user hasn't typed for a while.
        if (mLastKeystrokeTimer.getElapsedTimeF32() > LLAgent::TYPING_TIMEOUT_SECS)
        {
            setTyping(FALSE);
        }

        // If we are typing, and it's been a little while, send the
        // typing indicator
        if (!mSentTypingState
            && mFirstKeystrokeTimer.getElapsedTimeF32() > 1.f)
        {
            sendTypingState(TRUE);
            mSentTypingState = TRUE;
        }
    }

    // use embedded panel if available
    if (mSpeakerPanel)
    {
        if (mSpeakerPanel->getVisible())
        {
            mSpeakerPanel->refreshSpeakers();
        }
    }
    else
    {
        // refresh volume and mute checkbox
        childSetVisible("speaker_volume", LLVoiceClient::getInstance()->voiceEnabled() && voice_channel->isActive());
        childSetValue("speaker_volume", LLVoiceClient::getInstance()->getUserVolume(mOtherParticipantUUID));

        childSetValue("mute_btn", LLMuteList::getInstance()->isMuted(mOtherParticipantUUID, LLMute::flagVoiceChat));
        childSetVisible("mute_btn", LLVoiceClient::getInstance()->voiceEnabled() && voice_channel->isActive());
    }
    LLFloater::draw();
}

class LLSessionInviteResponder : public LLHTTPClient::Responder
{
    LOG_CLASS(LLSessionInviteResponder);
public:
    LLSessionInviteResponder(const LLUUID& session_id)
    {
        mSessionID = session_id;
    }

protected:
    void httpFailure()
    {
        LL_WARNS() << "Error inviting all agents to session " << dumpResponse() << LL_ENDL;
        //throw something back to the viewer here?
    }

private:
    LLUUID mSessionID;
};

BOOL LLFloaterIMPanel::inviteToSession(const std::vector<LLUUID>& ids)
{
    LLViewerRegion* region = gAgent.getRegion();
    if (!region)
    {
        return FALSE;
    }

    S32 count = ids.size();

    if( isInviteAllowed() && (count > 0) )
    {
        LL_INFOS() << "LLFloaterIMPanel::inviteToSession() - inviting participants" << LL_ENDL;

        std::string url = region->getCapability("ChatSessionRequest");

        LLSD data;

        data["params"] = LLSD::emptyArray();
        for (int i = 0; i < count; i++)
        {
            data["params"].append(ids[i]);
        }

        data["method"] = "invite";
        data["session-id"] = mSessionUUID;
        LLHTTPClient::post(
            url,
            data,
            new LLSessionInviteResponder(
                mSessionUUID));
    }
    else
    {
        LL_INFOS() << "LLFloaterIMPanel::inviteToSession -"
                << " no need to invite agents for "
                << mDialog << LL_ENDL;
        // successful add, because everyone that needed to get added
        // was added.
    }

    return TRUE;
}

void LLFloaterIMPanel::addHistoryLine(const std::string &utf8msg, const LLColor4& color, bool log_to_file, const LLUUID& source, const std::string& name)
{
    // start tab flashing when receiving im for background session from user
    if (source != LLUUID::null)
    {
        LLMultiFloater* hostp = getHost();
        if( !isInVisibleChain()
            && hostp
            && source != gAgent.getID())
        {
            hostp->setFloaterFlashing(this, TRUE);
        }
    }

    // Now we're adding the actual line of text, so erase the
    // "Foo is typing..." text segment, and the optional timestamp
    // if it was present. JC
    removeTypingIndicator(NULL);

    // Actually add the line
    std::string timestring;
    bool prepend_newline = true;
    if (gSavedSettings.getBOOL("IMShowTimestamps"))
    {
        timestring = mHistoryEditor->appendTime(prepend_newline);
        prepend_newline = false;
    }

    std::string separator_string(": ");

    // 'name' is a sender name that we want to hotlink so that clicking on it opens a profile.
    if (!name.empty()) // If name exists, then add it to the front of the message.
    {
        // Don't hotlink any messages from the system (e.g. "Second Life:"), so just add those in plain text.
        if (name == SYSTEM_FROM)
        {
            mHistoryEditor->appendText(name + separator_string, prepend_newline, LLStyle::Params().color(color));
        }
        else
        {
            // Convert the name to a hotlink and add to message.
            mHistoryEditor->appendText(name + separator_string, prepend_newline, LLStyleMap::instance().lookupAgent(source));
        }
        prepend_newline = false;
    }
    mHistoryEditor->appendText(utf8msg, prepend_newline, LLStyle::Params().color(color));
    mHistoryEditor->blockUndo();

    if (!isInVisibleChain())
    {
        mNumUnreadMessages++;
    }
}


void LLFloaterIMPanel::setInputFocus( BOOL b )
{
    mInputEditor->setFocus( b );
}


void LLFloaterIMPanel::selectAll()
{
    mInputEditor->selectAll();
}


void LLFloaterIMPanel::selectNone()
{
    mInputEditor->deselect();
}

BOOL LLFloaterIMPanel::handleKeyHere( KEY key, MASK mask )
{
    BOOL handled = FALSE;
    if( KEY_RETURN == key && mask == MASK_NONE)
    {
        sendMsg();
        handled = TRUE;
    }
    else if ( KEY_ESCAPE == key )
    {
        handled = TRUE;
        gFocusMgr.setKeyboardFocus(NULL);
    }

    // May need to call base class LLPanel::handleKeyHere if not handled
    // in order to tab between buttons.  JNC 1.2.2002
    return handled;
}

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

    if (mDialog == IM_NOTHING_SPECIAL)
    {
        LLToolDragAndDrop::handleGiveDragAndDrop(mOtherParticipantUUID, mSessionUUID, drop,
                                                 cargo_type, cargo_data, accept);
    }

    // handle case for dropping calling cards (and folders of calling cards) onto invitation panel for invites
    else if (isInviteAllowed())
    {
        *accept = ACCEPT_NO;

        if (cargo_type == DAD_CALLINGCARD)
        {
            if (dropCallingCard((LLInventoryItem*)cargo_data, drop))
            {
                *accept = ACCEPT_YES_MULTI;
            }
        }
        else if (cargo_type == DAD_CATEGORY)
        {
            if (dropCategory((LLInventoryCategory*)cargo_data, drop))
            {
                *accept = ACCEPT_YES_MULTI;
            }
        }
    }
    return TRUE;
}

BOOL LLFloaterIMPanel::dropCallingCard(LLInventoryItem* item, BOOL drop)
{
    BOOL rv = isInviteAllowed();
    if(rv && item && item->getCreatorUUID().notNull())
    {
        if(drop)
        {
            std::vector<LLUUID> ids;
            ids.push_back(item->getCreatorUUID());
            inviteToSession(ids);
        }
    }
    else
    {
        // set to false if creator uuid is null.
        rv = FALSE;
    }
    return rv;
}

BOOL LLFloaterIMPanel::dropCategory(LLInventoryCategory* category, BOOL drop)
{
    BOOL rv = isInviteAllowed();
    if(rv && category)
    {
        LLInventoryModel::cat_array_t cats;
        LLInventoryModel::item_array_t items;
        LLUniqueBuddyCollector buddies;
        gInventory.collectDescendentsIf(category->getUUID(),
                                        cats,
                                        items,
                                        LLInventoryModel::EXCLUDE_TRASH,
                                        buddies);
        S32 count = items.count();
        if(count == 0)
        {
            rv = FALSE;
        }
        else if(drop)
        {
            std::vector<LLUUID> ids;
            ids.reserve(count);
            for(S32 i = 0; i < count; ++i)
            {
                ids.push_back(items.get(i)->getCreatorUUID());
            }
            inviteToSession(ids);
        }
    }
    return rv;
}

BOOL LLFloaterIMPanel::isInviteAllowed() const
{

    return ( (IM_SESSION_CONFERENCE_START == mDialog)
             || (IM_SESSION_INVITE == mDialog) );
}


// static
void LLFloaterIMPanel::onTabClick(void* userdata)
{
    LLFloaterIMPanel* self = (LLFloaterIMPanel*) userdata;
    self->setInputFocus(TRUE);
}


// static
void LLFloaterIMPanel::onClickProfile( void* userdata )
{
    //  Bring up the Profile window
    LLFloaterIMPanel* self = (LLFloaterIMPanel*) userdata;

    if (self->getOtherParticipantID().notNull())
    {
        LLAvatarActions::showProfile(self->getOtherParticipantID());
    }
}

// static
void LLFloaterIMPanel::onClickGroupInfo( void* userdata )
{
    //  Bring up the Profile window
    LLFloaterIMPanel* self = (LLFloaterIMPanel*) userdata;

    LLGroupActions::show(self->mSessionUUID);

}

// static
void LLFloaterIMPanel::onClickClose( void* userdata )
{
    LLFloaterIMPanel* self = (LLFloaterIMPanel*) userdata;
    if(self)
    {
        self->closeFloater();
    }
}

// static
void LLFloaterIMPanel::onClickStartCall(void* userdata)
{
    LLFloaterIMPanel* self = (LLFloaterIMPanel*) userdata;

    gIMMgr->startCall(self->mSessionUUID);
}

// static
void LLFloaterIMPanel::onClickEndCall(void* userdata)
{
    LLFloaterIMPanel* self = (LLFloaterIMPanel*) userdata;

    gIMMgr->endCall(self->mSessionUUID);
}

// static
void LLFloaterIMPanel::onClickSend(void* userdata)
{
    LLFloaterIMPanel* self = (LLFloaterIMPanel*)userdata;
    self->sendMsg();
}

// static
void LLFloaterIMPanel::onClickToggleActiveSpeakers(void* userdata)
{
    LLFloaterIMPanel* self = (LLFloaterIMPanel*)userdata;

    self->childSetVisible("active_speakers_panel", !self->childIsVisible("active_speakers_panel"));
}

// static
void LLFloaterIMPanel::onCommitChat(LLUICtrl* caller, void* userdata)
{
    LLFloaterIMPanel* self= (LLFloaterIMPanel*) userdata;
    self->sendMsg();
}

// static
void LLFloaterIMPanel::onInputEditorFocusReceived( LLFocusableElement* caller, void* userdata )
{
    LLFloaterIMPanel* self= (LLFloaterIMPanel*) userdata;
    self->mHistoryEditor->setCursorAndScrollToEnd();
}

// static
void LLFloaterIMPanel::onInputEditorFocusLost(LLFocusableElement* caller, void* userdata)
{
    LLFloaterIMPanel* self = (LLFloaterIMPanel*) userdata;
    self->setTyping(FALSE);
}

// static
void LLFloaterIMPanel::onInputEditorKeystroke(LLLineEditor* caller, void* userdata)
{
    LLFloaterIMPanel* self = (LLFloaterIMPanel*)userdata;
    std::string text = self->mInputEditor->getText();
    if (!text.empty())
    {
        self->setTyping(TRUE);
    }
    else
    {
        // Deleting all text counts as stopping typing.
        self->setTyping(FALSE);
    }
}

// virtual
void LLFloaterIMPanel::onClose(bool app_quitting)
{
    setTyping(FALSE);

    gIMMgr->leaveSession(mSessionUUID);

    // *HACK hide the voice floater
    LLFloaterReg::hideInstance("voice_call", mSessionUUID);
}

void LLFloaterIMPanel::onVisibilityChange(const LLSD& new_visibility)
{
    if (new_visibility.asBoolean())
    {
        mNumUnreadMessages = 0;
    }

    LLVoiceChannel* voice_channel = LLIMModel::getInstance()->getVoiceChannel(mSessionUUID);
    if (voice_channel && voice_channel->getState() == LLVoiceChannel::STATE_CONNECTED)
    {
        if (new_visibility.asBoolean())
            LLFloaterReg::showInstance("voice_call", mSessionUUID);
        else
            LLFloaterReg::hideInstance("voice_call", mSessionUUID);
    }
}

void LLFloaterIMPanel::sendMsg()
{
    if (!gAgent.isGodlike()
        && (mDialog == IM_NOTHING_SPECIAL)
        && mOtherParticipantUUID.isNull())
    {
        LL_INFOS() << "Cannot send IM to everyone unless you're a god." << LL_ENDL;
        return;
    }

    if (mInputEditor)
    {
        LLWString text = mInputEditor->getConvertedText();
        if(!text.empty())
        {
            // store sent line in history, duplicates will get filtered
            if (mInputEditor) mInputEditor->updateHistory();
            // Truncate and convert to UTF8 for transport
            std::string utf8_text = wstring_to_utf8str(text);
            utf8_text = utf8str_truncate(utf8_text, MAX_MSG_BUF_SIZE - 1);

            if ( mSessionInitialized )
            {
                LLIMModel::sendMessage(utf8_text,
                                mSessionUUID,
                                mOtherParticipantUUID,
                                mDialog);

            }
            else
            {
                //queue up the message to send once the session is
                //initialized
                mQueuedMsgsForInit.append(utf8_text);
            }
        }

        LLViewerStats::getInstance()->incStat(LLViewerStats::ST_IM_COUNT);

        mInputEditor->setText(LLStringUtil::null);
    }

    // Don't need to actually send the typing stop message, the other
    // client will infer it from receiving the message.
    mTyping = FALSE;
    mSentTypingState = TRUE;
}

void LLFloaterIMPanel::processSessionUpdate(const LLSD& session_update)
{
    if (
        session_update.has("moderated_mode") &&
        session_update["moderated_mode"].has("voice") )
    {
        BOOL voice_moderated = session_update["moderated_mode"]["voice"];

        if (voice_moderated)
        {
            setTitle(mSessionLabel + std::string(" ") + getString("moderated_chat_label"));
        }
        else
        {
            setTitle(mSessionLabel);
        }


        //update the speakers dropdown too, if it's available
        if (mSpeakerPanel)
        {
            mSpeakerPanel->setVoiceModerationCtrlMode(voice_moderated);
        }
    }
}

void LLFloaterIMPanel::sessionInitReplyReceived(const LLUUID& session_id)
{
    mSessionUUID = session_id;
    mSessionInitialized = TRUE;

    //we assume the history editor hasn't moved at all since
    //we added the starting session message
    //so, we count how many characters to remove
    S32 chars_to_remove = mHistoryEditor->getWText().length() -
        mSessionStartMsgPos;
    mHistoryEditor->removeTextFromEnd(chars_to_remove);

    //and now, send the queued msg
    LLSD::array_iterator iter;
    for ( iter = mQueuedMsgsForInit.beginArray();
          iter != mQueuedMsgsForInit.endArray();
          ++iter)
    {
        LLIMModel::sendMessage(
            iter->asString(),
            mSessionUUID,
            mOtherParticipantUUID,
            mDialog);
    }
}

void LLFloaterIMPanel::setTyping(BOOL typing)
{
    LLIMSpeakerMgr* speaker_mgr = LLIMModel::getInstance()->getSpeakerManager(mSessionUUID);
    if (typing)
    {
        // Every time you type something, reset this timer
        mLastKeystrokeTimer.reset();

        if (!mTyping)
        {
            // You just started typing.
            mFirstKeystrokeTimer.reset();

            // Will send typing state after a short delay.
            mSentTypingState = FALSE;
        }

        if (speaker_mgr)
            speaker_mgr->setSpeakerTyping(gAgent.getID(), TRUE);
    }
    else
    {
        if (mTyping)
        {
            // you just stopped typing, send state immediately
            sendTypingState(FALSE);
            mSentTypingState = TRUE;
        }
        if (speaker_mgr)
            speaker_mgr->setSpeakerTyping(gAgent.getID(), FALSE);
    }

    mTyping = typing;
}

void LLFloaterIMPanel::sendTypingState(BOOL typing)
{
    // Don't want to send typing indicators to multiple people, potentially too
    // much network traffic.  Only send in person-to-person IMs.
    if (mDialog != IM_NOTHING_SPECIAL) return;

    LLIMModel::instance().sendTypingState(mSessionUUID, mOtherParticipantUUID, typing);
}


void LLFloaterIMPanel::processIMTyping(const LLIMInfo* im_info, BOOL typing)
{
    if (typing)
    {
        // other user started typing
        addTypingIndicator(im_info->mName);
    }
    else
    {
        // other user stopped typing
        removeTypingIndicator(im_info);
    }
}


void LLFloaterIMPanel::addTypingIndicator(const std::string &name)
{
    // we may have lost a "stop-typing" packet, don't add it twice
    if (!mOtherTyping)
    {
        mTypingLineStartIndex = mHistoryEditor->getWText().length();
        LLUIString typing_start = sTypingStartString;
        typing_start.setArg("[NAME]", name);
        addHistoryLine(typing_start, LLUIColorTable::instance().getColor("SystemChatColor"), false);
        mOtherTypingName = name;
        mOtherTyping = TRUE;
    }
    // MBW -- XXX -- merge from release broke this (argument to this function changed from an LLIMInfo to a name)
    // Richard will fix.
//  mSpeakers->setSpeakerTyping(im_info->mFromID, TRUE);
}


void LLFloaterIMPanel::removeTypingIndicator(const LLIMInfo* im_info)
{
    if (mOtherTyping)
    {
        // Must do this first, otherwise addHistoryLine calls us again.
        mOtherTyping = FALSE;

        S32 chars_to_remove = mHistoryEditor->getWText().length() - mTypingLineStartIndex;
        mHistoryEditor->removeTextFromEnd(chars_to_remove);
        if (im_info)
        {
            LLIMSpeakerMgr* speaker_mgr = LLIMModel::getInstance()->getSpeakerManager(mSessionUUID);
            if (speaker_mgr)
            {
                speaker_mgr->setSpeakerTyping(im_info->mFromID, FALSE);
            }
        }
    }
}

//static
void LLFloaterIMPanel::onKickSpeaker(void* user_data)
{

}