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/**
 * @file llimpanel.h
 * @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
 * $/LicenseInfo$
 */

#ifndef LL_IMPANEL_H
#define LL_IMPANEL_H

#include "lldockablefloater.h"
#include "lllogchat.h"
#include "lluuid.h"
#include "lldarray.h"
#include "llinstantmessage.h"
#include "llvoiceclient.h"
#include "llstyle.h"

class LLLineEditor;
class LLViewerTextEditor;
class LLInventoryItem;
class LLInventoryCategory;
class LLIMSpeakerMgr;
class LLPanelActiveSpeakers;
class LLPanelChatControlPanel;

class LLFloaterIMPanel : public LLFloater
{
public:

    // The session id is the id of the session this is for. The target
    // refers to the user (or group) that where this session serves as
    // the default. For example, if you open a session though a
    // calling card, a new session id will be generated, but the
    // target_id will be the agent referenced by the calling card.
    LLFloaterIMPanel(const std::string& session_label,
                     const LLUUID& session_id,
                     const LLUUID& target_id,
                     const std::vector<LLUUID>& ids,
                     EInstantMessage dialog);
    virtual ~LLFloaterIMPanel();

    /*virtual*/ BOOL postBuild();

    // Check typing timeout timer.
    /*virtual*/ void draw();

    /*virtual*/ void onClose(bool app_quitting);
    void onVisibilityChange(const LLSD& new_visibility);

    // add target ids to the session.
    // Return TRUE if successful, otherwise FALSE.
    BOOL inviteToSession(const std::vector<LLUUID>& agent_ids);

    void addHistoryLine(const std::string &utf8msg,
                        const LLColor4& color = LLColor4::white,
                        bool log_to_file = true,
                        const LLUUID& source = LLUUID::null,
                        const std::string& name = LLStringUtil::null);

    void setInputFocus( BOOL b );

    void selectAll();
    void selectNone();

    S32 getNumUnreadMessages() { return mNumUnreadMessages; }

    BOOL handleKeyHere(KEY key, MASK mask);
    BOOL handleDragAndDrop(S32 x, S32 y, MASK mask,
                           BOOL drop, EDragAndDropType cargo_type,
                           void *cargo_data, EAcceptance *accept,
                           std::string& tooltip_msg);

    static void     onInputEditorFocusReceived( LLFocusableElement* caller, void* userdata );
    static void     onInputEditorFocusLost(LLFocusableElement* caller, void* userdata);
    static void     onInputEditorKeystroke(LLLineEditor* caller, void* userdata);
    static void     onCommitChat(LLUICtrl* caller, void* userdata);
    static void     onTabClick( void* userdata );

    static void     onClickProfile( void* userdata );
    static void     onClickGroupInfo( void* userdata );
    static void     onClickClose( void* userdata );
    static void     onClickStartCall( void* userdata );
    static void     onClickEndCall( void* userdata );
    static void     onClickSend( void* userdata );
    static void     onClickToggleActiveSpeakers( void* userdata );
    static void*    createSpeakersPanel(void* data);
    static void     onKickSpeaker(void* user_data);

    //callbacks for P2P muting and volume control
    static void onClickMuteVoice(void* user_data);
    static void onVolumeChange(LLUICtrl* source, void* user_data);

    const LLUUID& getSessionID() const { return mSessionUUID; }
    const LLUUID& getOtherParticipantID() const { return mOtherParticipantUUID; }
    void processSessionUpdate(const LLSD& update);
    EInstantMessage getDialogType() const { return mDialog; }
    void setDialogType(EInstantMessage dialog) { mDialog = dialog; }

    void sessionInitReplyReceived(const LLUUID& im_session_id);

    // Handle other participant in the session typing.
    void processIMTyping(const LLIMInfo* im_info, BOOL typing);

private:
    // Called by UI methods.
    void sendMsg();

    // for adding agents via the UI. Return TRUE if possible, do it if
    BOOL dropCallingCard(LLInventoryItem* item, BOOL drop);
    BOOL dropCategory(LLInventoryCategory* category, BOOL drop);

    // test if local agent can add agents.
    BOOL isInviteAllowed() const;

    // Called whenever the user starts or stops typing.
    // Sends the typing state to the other user if necessary.
    void setTyping(BOOL typing);

    // Add the "User is typing..." indicator.
    void addTypingIndicator(const std::string &name);

    // Remove the "User is typing..." indicator.
    void removeTypingIndicator(const LLIMInfo* im_info);

    void sendTypingState(BOOL typing);

private:
    LLLineEditor* mInputEditor;
    LLViewerTextEditor* mHistoryEditor;

    // The value of the mSessionUUID depends on how the IM session was started:
    //   one-on-one  ==> random id
    //   group ==> group_id
    //   inventory folder ==> folder item_id
    //   911 ==> Gaurdian_Angel_Group_ID ^ gAgent.getID()
    LLUUID mSessionUUID;

    std::string mSessionLabel;

    BOOL mSessionInitialized;
    LLSD mQueuedMsgsForInit;

    // The value mOtherParticipantUUID depends on how the IM session was started:
    //   one-on-one = recipient's id
    //   group ==> group_id
    //   inventory folder ==> first target id in list
    //   911 ==> sender
    LLUUID mOtherParticipantUUID;
    std::vector<LLUUID> mSessionInitialTargetIDs;

    EInstantMessage mDialog;

    // Are you currently typing?
    BOOL mTyping;

    // Is other user currently typing?
    BOOL mOtherTyping;

    // name of other user who is currently typing
    std::string mOtherTypingName;

    // Where does the "User is typing..." line start?
    S32 mTypingLineStartIndex;
    // Where does the "Starting session..." line start?
    S32 mSessionStartMsgPos;

    S32 mNumUnreadMessages;

    BOOL mSentTypingState;

    BOOL mShowSpeakersOnConnect;

    BOOL mTextIMPossible;
    BOOL mProfileButtonEnabled;
    BOOL mCallBackEnabled;

    LLPanelActiveSpeakers* mSpeakerPanel;

    // Optimization:  Don't send "User is typing..." until the
    // user has actually been typing for a little while.  Prevents
    // extra IMs for brief "lol" type utterences.
    LLFrameTimer mFirstKeystrokeTimer;

    // Timer to detect when user has stopped typing.
    LLFrameTimer mLastKeystrokeTimer;

    boost::signals2::connection mFocusCallbackConnection;

    void disableWhileSessionStarting();
};

#endif  // LL_IMPANEL_H