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kopete/kopete

chatmessagepart.cpp

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/*
    chatmessagepart.cpp - Chat Message KPart

    Copyright (c) 2002-2005 by Olivier Goffart       <ogoffart@kde.org>
    Copyright (c) 2002-2003 by Martijn Klingens      <klingens@kde.org>
    Copyright (c) 2004      by Richard Smith         <kde@metafoo.co.uk>
    Copyright (c) 2005-2006 by Michaël Larouche     <larouche@kde.org>
    Copyright (c) 2008      by Roman Jarosz          <kedgedev@centrum.cz>

    Kopete    (c) 2002-2008 by the Kopete developers <kopete-devel@kde.org>

    *************************************************************************
    *                                                                       *
    * This program is free software; you can redistribute it and/or modify  *
    * it under the terms of the GNU General Public License as published by  *
    * the Free Software Foundation; either version 2 of the License, or     *
    * (at your option) any later version.                                   *
    *                                                                       *
    *************************************************************************
*/

#include "chatmessagepart.h"

// STYLE_TIMETEST is for time staticstic gathering.
//#define STYLE_TIMETEST

#include <ctime>

// Qt includes
#include <QtCore/QByteArray>
#include <QtCore/QLatin1String>
#include <QtCore/QList>
#include <QtCore/QPointer>
#include <QtCore/QRect>
#include <QtCore/QRegExp>
#include <QtCore/QTextCodec>
#include <QtCore/QTextStream>
#include <QtCore/QTimer>
#include <QtCore/QBuffer>
#include <QtGui/QClipboard>
#include <QtGui/QCursor>
#include <QtGui/QPixmap>
#include <QtGui/QTextDocument>
#include <QtGui/QScrollBar>
#include <QMimeData>
#include <QApplication>

// KHTML::DOM includes
#include <dom/dom_doc.h>
#include <dom/dom_text.h>
#include <dom/dom_element.h>
#include <dom/html_base.h>
#include <dom/html_document.h>
#include <dom/html_inline.h>
#include <dom/html_form.h>
#include <dom/dom2_events.h>


// KDE includes
#include <kactioncollection.h>
#include <kdebug.h>
#include <kdeversion.h>
#include <kfiledialog.h>
#include <khtmlview.h>
#include <klocale.h>
#include <kmessagebox.h>
#include <kmenu.h>
#include <krun.h>
#include <kstringhandler.h>
#include <ktemporaryfile.h>
#include <kio/copyjob.h>
#include <kstandardaction.h>
#include <kiconloader.h>
#include <kcodecs.h>
#include <kicon.h>

// Kopete includes
#include "kopetecontact.h"
#include "kopetecontactlist.h"
#include "kopetechatwindow.h"
#include "kopetechatsession.h"
#include "kopetemetacontact.h"
#include "kopetepluginmanager.h"
#include "kopeteprotocol.h"
#include "kopeteaccount.h"
#include "kopeteglobal.h"
#include "kopeteemoticons.h"
#include "kopeteview.h"
#include "kopetepicture.h"
#include "kopeteappearancesettings.h"
#include "kopetebehaviorsettings.h"
#include "kopetechatwindowsettings.h"
#include "kopetetransfermanager.h"

#include "kopetechatwindowstyle.h"
#include "kopetechatwindowstylemanager.h"

class ToolTip;

class ChatMessagePart::Private
{
public:
    Private()
     : /*tt(0L),*/ scrollPressed(false), manager(0),
       copyAction(0), saveAction(0), printAction(0),
       closeAction(0),copyURLAction(0), currentChatStyle(0),
       latestDirection(Kopete::Message::Inbound), latestType(Kopete::Message::TypeNormal),
       htmlEventListener(0)
    {}

    ~Private()
    {
        // Don't delete manager and latestContact, because they could be still used.
        // Don't delete currentChatStyle, it is handled by ChatWindowStyleManager.
    }

    bool bgOverride;
    bool fgOverride;
    bool rtfOverride;

//  ToolTip *tt;
    bool scrollPressed;
    Kopete::ChatSession *manager;

    DOM::HTMLElement activeElement;

    KAction *copyAction;
    KAction *saveAction;
    KAction *printAction;
    KAction *closeAction;
    KAction *copyURLAction;

    // We can't use QPointer because ChatWindowStyle is not a QObject
    ChatWindowStyle *currentChatStyle;
    QPointer<Kopete::Contact> latestContact;
    Kopete::Message::MessageDirection latestDirection;
    Kopete::Message::MessageType latestType;
    // Yep I know it will take memory, but I don't have choice
    // to enable on-the-fly style changing.
    QList<Kopete::Message> allMessages;
    
    // No need to delete, HTMLEventListener is ref counted.
    QPointer<HTMLEventListener> htmlEventListener;
};
/*
class ChatMessagePart::ToolTip : public Q3ToolTip
{
public:
    ToolTip( ChatMessagePart *c ) : Q3ToolTip( c->view()->viewport() )
    {
        m_chat = c;
    }

    void maybeTip( const QPoint &p )
    {
        // FIXME: it's wrong to look for the node under the mouse - this makes too many
        //        assumptions about how tooltips work. but there is no nodeAtPoint.
        DOM::Node node = m_chat->nodeUnderMouse();
        Kopete::Contact *contact = m_chat->contactFromNode( node );
        QString toolTipText;

        if(node.isNull())
            return;

        // this tooltip is attached to the viewport widget, so translate the node's rect
        // into its coordinates.
        QRect rect = node.getRect();
        rect = QRect( m_chat->view()->contentsToViewport( rect.topLeft() ),
                  m_chat->view()->contentsToViewport( rect.bottomRight() ) );

        if( contact )
        {
            toolTipText = contact->toolTip();
        }
        else
        {
            m_chat->emitTooltipEvent( m_chat->textUnderMouse(), toolTipText );

            if( toolTipText.isEmpty() )
            {
                //Fall back to the title attribute
                for( DOM::HTMLElement element = node; !element.isNull(); element = element.parentNode() )
                {
                    if( element.hasAttribute( "title" ) )
                    {
                        toolTipText = element.getAttribute( "title" ).string();
                        break;
                    }
                }
            }
        }

        if( !toolTipText.isEmpty() )
            tip( rect, toolTipText );
    }

private:
    ChatMessagePart *m_chat;
};
*/

ChatMessagePart::ChatMessagePart( Kopete::ChatSession *mgr, QWidget *parent )
    : KHTMLPart( parent ), d( new Private )
{
    d->manager = mgr;

    d->currentChatStyle = ChatWindowStyleManager::self()->getStyleFromPool(
             KopeteChatWindowSettings::self()->styleName() );

    kDebug(14000) << d->currentChatStyle->getStyleName();

    //Security settings, we don't need this stuff
    setJScriptEnabled( false ) ;
    setJavaEnabled( false );
    setPluginsEnabled( false );
    setMetaRefreshEnabled( false );
    setOnlyLocalReferences( true );

    // Write the template to KHTMLPart
    writeTemplate();

    // It is not possible to drag and drop on our widget
    view()->setAcceptDrops(false);

    connect( Kopete::AppearanceSettings::self(), SIGNAL(messageOverridesChanged()),
             this, SLOT( slotAppearanceChanged() ) );
    connect( KopeteChatWindowSettings::self(), SIGNAL(chatwindowAppearanceChanged()),
             this, SLOT( slotRefreshView() ) );
    connect( KopeteChatWindowSettings::self(), SIGNAL(styleChanged(const QString &)),
             this, SLOT( setStyle(const QString &) ) );
    connect( KopeteChatWindowSettings::self(), SIGNAL(styleVariantChanged(const QString &)),
             this, SLOT( setStyleVariant(const QString &) ) );

    // Refresh the style if the display name change.
    connect( d->manager, SIGNAL(displayNameChanged()), this, SLOT(slotUpdateHeaderDisplayName()) );
    connect( d->manager, SIGNAL(photoChanged()), this, SLOT(slotUpdateHeaderPhoto()) );

    connect( d->manager, SIGNAL(messageStateChanged(uint, Kopete::Message::MessageState)),
             this, SLOT(messageStateChanged(uint, Kopete::Message::MessageState)) );

    connect ( browserExtension(), SIGNAL( openUrlRequestDelayed( const KUrl &, const KParts::OpenUrlArguments &, const KParts::BrowserArguments & ) ),
              this, SLOT( slotOpenURLRequest( const KUrl &, const KParts::OpenUrlArguments &, const KParts::BrowserArguments & ) ) );

    connect( this, SIGNAL(popupMenu(const QString &, const QPoint &)),
             this, SLOT(slotRightClick(const QString &, const QPoint &)) );
    connect( view()->verticalScrollBar(), SIGNAL(sliderMoved(int)),
             this, SLOT(slotScrollingTo(int)) );

    connect( Kopete::TransferManager::transferManager(), SIGNAL(askIncomingDone(unsigned int)),
             this, SLOT(slotFileTransferIncomingDone(unsigned int)) );
    
    //initActions
    d->copyAction = KStandardAction::copy( this, SLOT(copy()), actionCollection() );
    d->saveAction = KStandardAction::saveAs( this, SLOT(save()), actionCollection() );
    d->printAction = KStandardAction::print( this, SLOT(print()),actionCollection() );
    d->closeAction = KStandardAction::close( this, SLOT(slotCloseView()),actionCollection() );
    d->copyURLAction = new KAction( KIcon("edit-copy"), i18n( "Copy Link Address" ), actionCollection() );
        actionCollection()->addAction( "editcopy", d->copyURLAction );
    connect( d->copyURLAction, SIGNAL( triggered(bool) ), this, SLOT( slotCopyURL() ) );

    // read formatting override flags
    readOverrides();
}

ChatMessagePart::~ChatMessagePart()
{
    kDebug(14000) ;

    // Cancel all pending file transfer requests
    QList<Kopete::Message>::ConstIterator it, itEnd = d->allMessages.constEnd();
    for ( it = d->allMessages.constBegin(); it != itEnd; ++it )
    {
        if ( (*it).type() == Kopete::Message::TypeFileTransferRequest && !(*it).fileTransferDisabled() )
        {
            Kopete::TransferManager::transferManager()->cancelIncomingTransfer( (*it).id() );
        }
    }

    //delete d->tt;
    delete d;
}

void ChatMessagePart::slotScrollingTo( int y )
{
    int scrolledTo = y + view()->visibleHeight();
    d->scrollPressed = scrolledTo < ( view()->contentsHeight() - 10 );
}

void ChatMessagePart::save()
{
    const KUrl dummyUrl;
    KFileDialog dlg( dummyUrl, QLatin1String( "text/html text/plain" ), view() );
    dlg.setCaption( i18n( "Save Conversation" ) );
    dlg.setOperationMode( KFileDialog::Saving );

    if ( dlg.exec() != QDialog::Accepted )
        return;

    KUrl saveURL = dlg.selectedUrl();
    KTemporaryFile *tempFile = new KTemporaryFile();
    tempFile->setAutoRemove(false);
    tempFile->open();

    QTextStream stream ( tempFile );
    stream.setCodec(QTextCodec::codecForName("UTF-8"));

    if ( dlg.currentFilter() == QLatin1String( "text/plain" ) )
    {
        QList<Kopete::Message>::ConstIterator it, itEnd = d->allMessages.constEnd();
        for(it = d->allMessages.constBegin(); it != itEnd; ++it)
        {
            Kopete::Message tempMessage = *it;
            stream << "[" << KGlobal::locale()->formatDateTime(tempMessage.timestamp()) << "] ";
            if( tempMessage.from() && tempMessage.from()->metaContact() )
            {
                stream << formatName(tempMessage.from()->metaContact()->displayName(), Qt::RichText);
            }
            stream << ": " << tempMessage.plainBody() << "\n";
        }
    }
    else
    {
        stream << htmlDocument().toString().string() << '\n';
    }

    stream.flush();
    QString fileName = tempFile->fileName();
    delete tempFile;

    KIO::CopyJob *moveJob = KIO::move( KUrl( fileName ), saveURL, KIO::HideProgressInfo );

    if ( !moveJob )
    {
        KMessageBox::queuedMessageBox( view(), KMessageBox::Error,
                i18n("<qt>Could not open <b>%1</b> for writing.</qt>", saveURL.prettyUrl() ), // Message
                i18n("Error While Saving") ); //Caption
    }
}

void ChatMessagePart::pageUp()
{
    view()->scrollBy( 0, -view()->visibleHeight() );
}

void ChatMessagePart::pageDown()
{
    view()->scrollBy( 0, view()->visibleHeight() );
}

void ChatMessagePart::slotOpenURLRequest(const KUrl &url, const KParts::OpenUrlArguments &, const KParts::BrowserArguments &)
{
    kDebug(14000) << "url=" << url.url();
    if ( url.protocol() == QLatin1String("kopetemessage") )
    {
        Kopete::Contact *contact = d->manager->account()->contacts()[ url.host() ];
        if ( contact )
            contact->execute();
    }
    else
    {
        KRun *runner = new KRun( url, 0, 0, false ); // false = non-local files
        runner->setRunExecutables( false ); //security
        //KRun autodeletes itself by default when finished.
    }
}

void ChatMessagePart::slotFileTransferIncomingDone( unsigned int id )
{
    QList<Kopete::Message>::Iterator it = d->allMessages.end();
    while ( it != d->allMessages.begin() )
    {
        --it;
        if ( (*it).id() == id )
        {
            (*it).setFileTransferDisabled( true );
            disableFileTransferButtons( id );
            break;
        }
    }
}

void ChatMessagePart::readOverrides()
{
    d->bgOverride = Kopete::AppearanceSettings::self()->chatBgOverride();
    d->fgOverride = Kopete::AppearanceSettings::self()->chatFgOverride();
    d->rtfOverride = Kopete::AppearanceSettings::self()->chatRtfOverride();
}

void ChatMessagePart::setStyle( const QString &styleName )
{
    // Create a new ChatWindowStyle
    d->currentChatStyle = ChatWindowStyleManager::self()->getStyleFromPool(styleName);

    // Do the actual style switch
    // Wait for the event loop before switching the style
    QTimer::singleShot( 0, this, SLOT(changeStyle()) );
}

void ChatMessagePart::setStyle( ChatWindowStyle *style )
{
    // Change the current style
    d->currentChatStyle = style;

    // Do the actual style switch
    // Wait for the event loop before switching the style
    QTimer::singleShot( 0, this, SLOT(changeStyle()) );
}

void ChatMessagePart::setStyleVariant( const QString &variantPath )
{
    DOM::HTMLElement variantNode = document().getElementById( QString("mainStyle") );
    if( !variantNode.isNull() )
        variantNode.setInnerText( QString("@import url(\"%1\");").arg( adjustStyleVariantForChatSession( variantPath) ) );
}

void ChatMessagePart::messageStateChanged( uint messageId, Kopete::Message::MessageState state )
{
    QList<Kopete::Message>::Iterator it = d->allMessages.end();
    while ( it != d->allMessages.begin() )
    {
        --it;
        if ( (*it).id() == messageId )
        {
            (*it).setState( state );
            changeMessageStateElement( messageId, state );
            break;
        }
    }
}

void ChatMessagePart::slotAppearanceChanged()
{
    readOverrides();

    changeStyle();
}

void ChatMessagePart::appendMessage( Kopete::Message &message, bool restoring )
{
    message.setBackgroundOverride( d->bgOverride );
    message.setForegroundOverride( d->fgOverride );
    message.setRichTextOverride( d->rtfOverride );

    // parse emoticons and URL now.
    // Do not reparse emoticons on restoring, because it cause very intensive CPU usage on long chats.
    if( !restoring )
        message.setHtmlBody( message.parsedBody() );

#ifdef STYLE_TIMETEST
    QTime beforeMessage = QTime::currentTime();
#endif

    QString formattedMessageHtml;
    bool isConsecutiveMessage = false;
    int bufferLen = Kopete::BehaviorSettings::self()->chatWindowBufferViewSize();

    // Find the "Chat" div element.
    // If the "Chat" div element is not found, do nothing. It's the central part of Adium format.
    DOM::HTMLElement chatNode = htmlDocument().getElementById( "Chat" );

    if( chatNode.isNull() )
    {
        kDebug(14000) << "WARNING: Chat Node was null !";
        return;
    }

    // Check if it's a consecutive Message
    // Consecutive messages are only for normal messages, status messages do not have a <div id="insert" />
    // We check if the from() is the latestContact, because consecutive incoming/outgoing message can come from differents peopole(in groupchat and IRC)
    // Group only if the user want it.
    if( KopeteChatWindowSettings::self()->groupConsecutiveMessages() )
    {
        isConsecutiveMessage = (message.direction() == d->latestDirection && !d->latestContact.isNull()
                                && d->latestContact == message.from() && message.type() == d->latestType
                                && message.type() != Kopete::Message::TypeFileTransferRequest );
    }

    // Don't test it in the switch to don't break consecutive messages.
    if(message.type() == Kopete::Message::TypeAction)
    {
        // Check if chat style support Action template (Kopete extension)
        if( d->currentChatStyle->hasActionTemplate() )
        {
            switch(message.direction())
            {
                case Kopete::Message::Inbound:
                    formattedMessageHtml = d->currentChatStyle->getActionIncomingHtml();
                    break;
                case Kopete::Message::Outbound:
                    formattedMessageHtml = d->currentChatStyle->getActionOutgoingHtml();
                    break;
                default:
                    break;
            }
        }
        // Use status template if no Action template.
        else
        {
            formattedMessageHtml = d->currentChatStyle->getStatusHtml();
        }
    }
    else if(message.type() == Kopete::Message::TypeFileTransferRequest)
    {
        formattedMessageHtml = d->currentChatStyle->getFileTransferIncomingHtml();
    }
    else
    {
        switch(message.direction())
        {
            case Kopete::Message::Inbound:
            {
                if(isConsecutiveMessage)
                {
                    formattedMessageHtml = d->currentChatStyle->getNextIncomingHtml();
                }
                else
                {
                    formattedMessageHtml = d->currentChatStyle->getIncomingHtml();
                }
                break;
            }
            case Kopete::Message::Outbound:
            {
                if(isConsecutiveMessage)
                {
                    formattedMessageHtml = d->currentChatStyle->getNextOutgoingHtml();
                }
                else
                {
                    formattedMessageHtml = d->currentChatStyle->getOutgoingHtml();
                }
                break;
            }
            case Kopete::Message::Internal:
            {
                formattedMessageHtml = d->currentChatStyle->getStatusHtml();
                break;
            }
        }
    }

    formattedMessageHtml = formatStyleKeywords( formattedMessageHtml, message );

    // newMessageNode is common to both code path
    // FIXME: Find a better than to create a dummy span.
    DOM::HTMLElement newMessageNode = document().createElement( QString("span") );
    newMessageNode.setInnerHTML( formattedMessageHtml );

    // Find the insert Node
    DOM::HTMLElement insertNode = document().getElementById( QString("insert") );

    if( isConsecutiveMessage && !insertNode.isNull() )
    {
        // Replace the insert block, because it's a consecutive message.
        insertNode.parentNode().replaceChild(newMessageNode, insertNode);
    }
    else
    {
        // Remove the insert block, because it's a new message.
        if( !insertNode.isNull() )
            insertNode.parentNode().removeChild(insertNode);
        // Append to the chat.
        chatNode.appendChild(newMessageNode);
    }

    if ( message.type() == Kopete::Message::TypeNormal ) 
    {
        if ( message.direction() == Kopete::Message::Outbound )
            changeMessageStateElement( message.id(), message.state() );
    }
    else if ( message.type() == Kopete::Message::TypeFileTransferRequest )
    {
        if ( message.fileTransferDisabled() )
            disableFileTransferButtons( message.id() );
        else
            addFileTransferButtonsEventListener( message.id() );
    }

    // Keep the direction to see on next message
    // if it's a consecutive message
    // Keep also the from() contact.
    d->latestDirection = message.direction();
    d->latestType = message.type();
    d->latestContact = const_cast<Kopete::Contact*>(message.from());

    // Add the message to the list for futher restoring if needed
    if(!restoring)
        d->allMessages.append(message);

    while ( bufferLen>0 && d->allMessages.count() >= bufferLen )
    {
        d->allMessages.pop_front();

        // FIXME: Find a way to make work Chat View Buffer efficiently with consecutives messages.
        // Before it was calling changeStyle() but it's damn too slow.
        if( !KopeteChatWindowSettings::self()->groupConsecutiveMessages() )
        {
            chatNode.removeChild( chatNode.firstChild() );
        }
    }

    if ( !d->scrollPressed )
        QTimer::singleShot( 1, this, SLOT( slotScrollView() ) );

#ifdef STYLE_TIMETEST
    kDebug(14000) << "Message time: " << beforeMessage.msecsTo( QTime::currentTime());
#endif
}

void ChatMessagePart::slotRefreshView()
{
    DOM::HTMLElement kopeteNode = document().getElementById( QString("KopeteStyle") );
    if( !kopeteNode.isNull() )
        kopeteNode.setInnerText( styleHTML() );

    DOM::HTMLBodyElement bodyElement = htmlDocument().body();
    bodyElement.setBgColor( Kopete::AppearanceSettings::self()->chatBackgroundColor().name() );
}

void ChatMessagePart::keepScrolledDown()
{
    if ( !d->scrollPressed )
        QTimer::singleShot( 1, this, SLOT( slotScrollView() ) );
}

const QString ChatMessagePart::styleHTML() const
{
    Kopete::AppearanceSettings *settings = Kopete::AppearanceSettings::self();

    QString style = QString(
        "body{background-color:%1;font-family:%2;font-size:%3pt;color:%4}"
        "td{font-family:%5;font-size:%6pt;color:%7}"
        "input{font-family:%8;font-size:%9pt;color:%10}"
        "a{color:%11}a.visited{color:%12}"
        "a.KopeteDisplayName{text-decoration:none;color:inherit;}"
        "a.KopeteDisplayName:hover{text-decoration:underline;color:inherit}"
        ".KopeteLink{cursor:pointer;}.KopeteLink:hover{text-decoration:underline}"
        ".KopeteMessageBody > p:first-child{margin:0;padding:0;display:inline;}" /* some html messages are encapsuled into a <p> */ )
        .arg( settings->chatBackgroundColor().name() )
        .arg( settings->chatFont().family() )
        .arg( settings->chatFont().pointSize() )
        .arg( settings->chatTextColor().name() )
        .arg( settings->chatFont().family() )
        .arg( settings->chatFont().pointSize() )
        .arg( settings->chatTextColor().name() )
        .arg( settings->chatFont().family() )
        .arg( settings->chatFont().pointSize() )
        .arg( settings->chatTextColor().name() )
        .arg( settings->chatLinkColor().name() )
        .arg( settings->chatLinkColor().name() );

    return style;
}

void ChatMessagePart::clear()
{
    // writeTemplate actually reset the HTML chat session from the beginning.
    writeTemplate();

    // Reset consecutive messages
    d->latestContact = 0;

    // Cancel all pending file transfer requests
    QList<Kopete::Message>::ConstIterator it, itEnd = d->allMessages.constEnd();
    for ( it = d->allMessages.constBegin(); it != itEnd; ++it )
    {
        if ( (*it).type() == Kopete::Message::TypeFileTransferRequest && !(*it).fileTransferDisabled() )
        {
            Kopete::TransferManager::transferManager()->cancelIncomingTransfer( (*it).id() );
        }
    }

    // Remove all stored messages.
    d->allMessages.clear();
}

Kopete::Contact *ChatMessagePart::contactFromNode( const DOM::Node &n ) const
{
    DOM::Node node = n;
    int i;
    QList<Kopete::Contact*> m;

    if ( node.isNull() )
        return 0;

    while ( !node.isNull() && ( node.nodeType() == DOM::Node::TEXT_NODE || ((DOM::HTMLElement)node).className() != "KopeteDisplayName" ) )
        node = node.parentNode();

    DOM::HTMLElement element = node;
    if ( element.className() != "KopeteDisplayName" )
        return 0;

    m = d->manager->members();
    if ( element.hasAttribute( "contactid" ) )
    {
        QString contactId = element.getAttribute( "contactid" ).string();
        for ( i =0; i != m.size(); i++ )
            if ( m.at(i)->contactId() == contactId )
                return m[i];
    }
    else
    {
        QString nick = element.innerText().string().trimmed();
        foreach ( Kopete::Contact *contact, m )
        {
            QString contactNick;
            if( contact->metaContact() && contact->metaContact() != Kopete::ContactList::self()->myself() )
                contactNick = contact->metaContact()->displayName();
            else
                contactNick = contact->nickName();

            if ( contactNick == nick )
                return contact;
        }
    }

    return 0;
}

void ChatMessagePart::slotRightClick( const QString &, const QPoint &point )
{
    // look through parents until we find an Element
    DOM::Node activeNode = nodeUnderMouse();
    while ( !activeNode.isNull() && activeNode.nodeType() != DOM::Node::ELEMENT_NODE )
        activeNode = activeNode.parentNode();

    // make sure it's valid
    d->activeElement = activeNode;
    if ( d->activeElement.isNull() )
        return;

    KMenu *chatWindowPopup = 0L;

    if ( Kopete::Contact *contact = contactFromNode( d->activeElement ) )
    {
        chatWindowPopup = contact->popupMenu( d->manager );
        connect( chatWindowPopup, SIGNAL( aboutToHide() ), chatWindowPopup , SLOT( deleteLater() ) );
    }
    else
    {
        chatWindowPopup = new KMenu();

        QAction *action;
        if ( d->activeElement.className() == QLatin1String("KopeteDisplayName") )
        {
            action = chatWindowPopup->addAction( i18n( "User Has Left" ) );
            action->setEnabled(false);
            chatWindowPopup->addSeparator();
        }
        else if ( d->activeElement.tagName().lower() == QLatin1String( "a" ) )
        {
            chatWindowPopup->addAction( d->copyURLAction );
            chatWindowPopup->addSeparator();
        }

        d->copyAction->setEnabled( hasSelection() );
        chatWindowPopup->addAction( d->copyAction );
        chatWindowPopup->addAction( d->saveAction );
        chatWindowPopup->addAction( d->printAction );
        chatWindowPopup->addSeparator();
        chatWindowPopup->addAction( d->closeAction );

        connect( chatWindowPopup, SIGNAL( aboutToHide() ), chatWindowPopup, SLOT( deleteLater() ) );
        chatWindowPopup->popup( point );
    }

    //Emit for plugin hooks
    emit contextMenuEvent( textUnderMouse(), chatWindowPopup );

    chatWindowPopup->popup( point );
}

QString ChatMessagePart::textUnderMouse()
{
    DOM::Node activeNode = nodeUnderMouse();
    if( activeNode.nodeType() != DOM::Node::TEXT_NODE )
        return QString();

    DOM::Text textNode = activeNode;
    QString data = textNode.data().string();

    //Ok, we have the whole node. Now, find the text under the mouse.
    int mouseLeft = view()->mapFromGlobal( QCursor::pos() ).x(),
        nodeLeft = activeNode.getRect().x(),
        cPos = 0,
        dataLen = data.length();

    QFontMetrics metrics( Kopete::AppearanceSettings::self()->chatFont() );
    QString buffer;
    while( cPos < dataLen && nodeLeft < mouseLeft )
    {
        QChar c = data[cPos++];
        if( c.isSpace() )
            buffer.truncate(0);
        else
            buffer += c;

        nodeLeft += metrics.width(c);
    }

    if( cPos < dataLen )
    {
        QChar c = data[cPos++];
        while( cPos < dataLen && !c.isSpace() )
        {
            buffer += c;
            c = data[cPos++];
        }
    }

    return buffer;
}

void ChatMessagePart::slotCopyURL()
{
    DOM::HTMLAnchorElement a = d->activeElement;
    if ( !a.isNull() )
    {
        QApplication::clipboard()->setText( a.href().string(), QClipboard::Clipboard );
        QApplication::clipboard()->setText( a.href().string(), QClipboard::Selection );
    }
}

void ChatMessagePart::slotScrollView()
{
    // NB: view()->contentsHeight() is incorrect before the view has been shown in its window.
    // Until this happens, the geometry has not been correctly calculated, so this scrollBy call
    // will usually scroll to the top of the view.
    view()->scrollBy( 0, view()->contentsHeight() );
}

void ChatMessagePart::copy(bool justselection /* default false */)
{
    /*
    * The objective of this function is to keep the text of emoticons (or of LaTeX image) when copying.
    *   see Bug 61676
    * This also copies the text as type text/html
    * RangeImpl::toHTML  was not implemented before KDE 3.4
    */
    QString htmltext = selectedTextAsHTML();
    QString text = selectedText();
        //selectedText is now sufficient
//      text=Kopete::Message::unescape( htmltext ).trimmed();
        // Message::unsescape will replace image by his title attribute
        // trimmed is for removing the newline added by the <!DOCTYPE> and other xml things of RangeImpl::toHTML

    if(text.isEmpty())
            return;

    disconnect( QApplication::clipboard(), SIGNAL( selectionChanged()), this, SLOT( slotClearSelection()));

#ifndef QT_NO_MIMECLIPBOARD
    if(!justselection)
    {
        QMimeData *mimeData = new QMimeData();
        mimeData->setText(text);

        if(!htmltext.isEmpty()) {
            htmltext.replace( QChar( 0xa0 ), ' ' );
            mimeData->setHtml(htmltext);
        }

        QApplication::clipboard()->setMimeData( mimeData, QClipboard::Clipboard );
    }
    QApplication::clipboard()->setText( text, QClipboard::Selection );
#else
    if(!justselection)
        QApplication::clipboard()->setText( text, QClipboard::Clipboard );
    QApplication::clipboard()->setText( text, QClipboard::Selection );
#endif
    connect( QApplication::clipboard(), SIGNAL( selectionChanged()), SLOT( slotClearSelection()));

}

void ChatMessagePart::print()
{
    view()->print();
}

void ChatMessagePart::khtmlDrawContentsEvent( khtml::DrawContentsEvent * event) //virtual
{
    KHTMLPart::khtmlDrawContentsEvent(event);
    //copy(true /*selection only*/); not needed anymore.
}
void ChatMessagePart::slotCloseView( bool force )
{
    d->manager->view()->closeView( force );
}

void ChatMessagePart::emitTooltipEvent(  const QString &textUnderMouse, QString &toolTip )
{
    emit tooltipEvent(  textUnderMouse, toolTip );
}

// Style formatting for messages(incoming, outgoing, status)
QString ChatMessagePart::formatStyleKeywords( const QString &sourceHTML, const Kopete::Message &_message )
{
    Kopete::Message message=_message; //we will eventually need to modify it before showing it.
    QString resultHTML = sourceHTML;
    QString nick, contactId, service, protocolIcon, nickLink;

    if( message.from() )
    {
        nick = formatName(message.from(), Qt::RichText);
        contactId = message.from()->contactId();
        // protocol() returns NULL here in the style preview in appearance config.
        // this isn't the right place to work around it, since contacts should never have
        // no protocol, but it works for now.
        //
        // Use default if protocol() and protocol()->displayName() is NULL.
        // For preview and unit tests.
        QString iconName = QLatin1String("kopete");
        service = QLatin1String("Kopete");
        if(message.from()->protocol() && !message.from()->protocol()->displayName().isNull())
        {
            service =  message.from()->protocol()->displayName();
            iconName = message.from()->protocol()->pluginIcon();
        }

        protocolIcon = KIconLoader::global()->iconPath( iconName, KIconLoader::Small );

        nickLink=QString("<a href=\"kopetemessage://%1/?protocolId=%2&amp;accountId=%3\" class=\"KopeteDisplayName\">")
                .arg( Qt::escape(message.from()->contactId()).replace('"',"&quot;"),
                      Qt::escape(message.from()->protocol()->pluginId()).replace('"',"&quot;"),
                      Qt::escape(message.from()->account()->accountId() ).replace('"',"&quot;"));
    }
    else
    {
        nickLink="<a>";
    }


    // Replace sender (contact nick)
    resultHTML.replace( QLatin1String("%sender%"), nickLink+nick+"</a>" );
    // Replace time, by default display only time and display seconds(that was true means).
    if ( Kopete::BehaviorSettings::showDates() )
        resultHTML.replace( QLatin1String("%time%"), KGlobal::locale()->formatDateTime(message.timestamp(), KLocale::ShortDate, true) );
    else
        resultHTML.replace( QLatin1String("%time%"), KGlobal::locale()->formatTime(message.timestamp().time(), true) );
    // Replace %screenName% (contact ID)
    resultHTML.replace( QLatin1String("%senderScreenName%"), nickLink+Qt::escape(contactId)+"</a>" );
    // Replace service name (protocol name)
    resultHTML.replace( QLatin1String("%service%"), Qt::escape(service) );
    // Replace protocolIcon (sender statusIcon)
    resultHTML.replace( QLatin1String("%senderStatusIcon%"), Qt::escape(protocolIcon).replace('"',"&quot;") );

    // Look for %time{X}%
    QRegExp timeRegExp("%time\\{([^}]*)\\}%");
    int pos=0;
    while( (pos=timeRegExp.indexIn(resultHTML , pos) ) != -1 )
    {
        QString timeKeyword = formatTime( timeRegExp.cap(1), message.timestamp() );
        resultHTML.replace( pos , timeRegExp.cap(0).length() , timeKeyword );
    }

    // Look for %textbackgroundcolor{X}%
    // TODO: use the X value.
    // Replace with user-selected highlight color if to be highlighted or
    // with "inherit" otherwise to keep CSS clean
    QString bgColor = QLatin1String("inherit");
    if( message.importance() == Kopete::Message::Highlight && Kopete::BehaviorSettings::self()->highlightEnabled() )
    {
        bgColor = Kopete::AppearanceSettings::self()->highlightBackgroundColor().name();
    }

    QRegExp textBackgroundRegExp("%textbackgroundcolor\\{([^}]*)\\}%");
    int textPos=0;
    while( (textPos=textBackgroundRegExp.indexIn(resultHTML, textPos) ) != -1 )
    {
        resultHTML.replace( textPos , textBackgroundRegExp.cap(0).length() , bgColor );
    }

    // Replace userIconPath
    if( message.from() )
    {
        QString photoPath = photoForContact( message.from() );
        if( photoPath.isEmpty() )
        {
            if(message.direction() == Kopete::Message::Inbound)
                photoPath = d->currentChatStyle->getStyleBaseHref() + QLatin1String("Incoming/buddy_icon.png");
            else if(message.direction() == Kopete::Message::Outbound)
                photoPath = d->currentChatStyle->getStyleBaseHref() + QLatin1String("Outgoing/buddy_icon.png");
        }
        resultHTML.replace(QLatin1String("%userIconPath%"), photoPath);
    }

    // Replace messages.
    // Build the action message if the currentChatStyle do not have Action template.
    if( message.type() == Kopete::Message::TypeAction && !d->currentChatStyle->hasActionTemplate() )
    {
        kDebug(14000) << "Map Action message to Status template. ";

        QString boldNick = QString("%1<b>%2</b></a> ").arg(nickLink,nick);
        QString newBody = boldNick + message.parsedBody();
        message.setHtmlBody(newBody );
    }

    // Set message direction("rtl"(Right-To-Left) or "ltr"(Left-to-right))
    resultHTML.replace( QLatin1String("%messageDirection%"), message.isRightToLeft() ? "rtl" : "ltr" );

    // These colors are used for coloring nicknames. I tried to use
    // colors both visible on light and dark background.
    static const char* const nameColors[] =
    {
        "red", "blue" , "gray", "magenta", "violet", /*"olive"*/ "#808000", "yellowgreen",
        "darkred", "darkgreen", "darksalmon", "darkcyan", /*"darkyellow"*/   "#B07D2B",
        "mediumpurple", "peru", "olivedrab", /*"royalred"*/ "#B01712", "darkorange", "slateblue",
        "slategray", "goldenrod", "orangered", "tomato", /*"dogderblue"*/ "#1E90FF", "steelblue",
        "deeppink", "saddlebrown", "coral", "royalblue"
    };

    static const int nameColorsLen = sizeof(nameColors) / sizeof(nameColors[0]) - 1;
    // hash contactId to deterministically pick a color for the contact
    int hash = 0;
    for( int f = 0; f < contactId.length(); ++f )
        hash += contactId[f].unicode() * f;
    const QString colorName = nameColors[ hash % nameColorsLen ];
    QString lightColorName; // Do not initialize, QColor::name() is expensive!
    kDebug(14000) << "Hash " << hash << " has color " << colorName;
    QRegExp senderColorRegExp("%senderColor(?:\\{([^}]*)\\})?%");
    textPos=0;
    while( (textPos=senderColorRegExp.indexIn(resultHTML, textPos) ) != -1 )
    {
        int light=100;
        bool doLight=false;
        if(senderColorRegExp.numCaptures()>=1)
        {
            light=senderColorRegExp.cap(1).toUInt(&doLight);
        }

        // Lazily init light color
        if ( doLight && lightColorName.isNull() )
            lightColorName = QColor( colorName ).light( light ).name();

        resultHTML.replace( textPos , senderColorRegExp.cap(0).length(),
            doLight ? lightColorName : colorName );
    }

    if ( message.type() == Kopete::Message::TypeFileTransferRequest )
    {
        QString fileIcon;
        if ( !message.filePreview().isNull() )
        {
            QByteArray tempArray;
            QBuffer tempBuffer( &tempArray );
            tempBuffer.open( QIODevice::WriteOnly );
            if( message.filePreview().save( &tempBuffer, "PNG" ) )
                fileIcon = QString( "data:image/png;base64," ) + tempArray.toBase64();
        }

        if ( fileIcon.isEmpty() )
        {
            QString iconName = KMimeType::iconNameForUrl( message.fileName() );
            fileIcon = KIconLoader::global()->iconPath( iconName, -KIconLoader::SizeMedium );
        }

        resultHTML.replace( QLatin1String("%fileName%"), Qt::escape( message.fileName() ).replace('"',"&quot;") );
        resultHTML.replace( QLatin1String("%fileSize%"), KGlobal::locale()->formatByteSize( message.fileSize() / 8 ).replace('"',"&quot;") );
        resultHTML.replace( QLatin1String("%fileIconPath%"), fileIcon );

        resultHTML.replace( QLatin1String("%saveFileHandlerId%"), QString( "ftSV%1" ).arg( message.id() ) );
        resultHTML.replace( QLatin1String("%saveFileAsHandlerId%"), QString( "ftSA%1" ).arg( message.id() ) );
        resultHTML.replace( QLatin1String("%cancelRequestHandlerId%"), QString( "ftCC%1" ).arg( message.id() ) );
    }
    
    if ( message.type() == Kopete::Message::TypeNormal && message.direction() == Kopete::Message::Outbound )
        resultHTML.replace( QLatin1String( "%stateElementId%" ), QString( "msST%1" ).arg( message.id() ) );

    // Replace message at the end, maybe someone could put a Adium keyword in his message :P
    resultHTML.replace( QLatin1String("%message%"), formatMessageBody(message) );

    // TODO: %status
//  resultHTML = addNickLinks( resultHTML );
    return resultHTML;
}

// Style formatting for header and footer.
QString ChatMessagePart::formatStyleKeywords( const QString &sourceHTML )
{
    QString resultHTML = sourceHTML;

    // Verify that all contacts are not null before doing anything
    if( !d->manager->members().isEmpty() && d->manager->myself() )
    {
        QString sourceName, destinationName;

        Kopete::Contact *remoteContact = d->manager->members().first();

        // Use contact nickname for ourselfs, Myself metacontact display name isn't a reliable source.
        sourceName = d->manager->myself()->nickName();
        if( remoteContact->metaContact() )
            destinationName = remoteContact->metaContact()->displayName();
        else
            destinationName = remoteContact->nickName();

        // Replace %chatName%, create a internal span to update it by DOM when asked.
        resultHTML.replace( QLatin1String("%chatName%"), QString("<span id=\"KopeteHeaderChatNameInternal\">%1</span>").arg( formatName(d->manager->displayName(), Qt::RichText) ) );
        // Replace %sourceName%
        resultHTML.replace( QLatin1String("%sourceName%"), formatName(sourceName, Qt::RichText) );
        // Replace %destinationName%
        resultHTML.replace( QLatin1String("%destinationName%"), formatName(destinationName, Qt::RichText) );
        // For %timeOpened%, display the date and time (also the seconds).
        resultHTML.replace( QLatin1String("%timeOpened%"), KGlobal::locale()->formatDateTime( QDateTime::currentDateTime(), KLocale::ShortDate, true ) );

        // Look for %timeOpened{X}%
        QRegExp timeRegExp("%timeOpened\\{([^}]*)\\}%");
        int pos=0;
        while( (pos=timeRegExp.indexIn(resultHTML, pos) ) != -1 )
        {
            QString timeKeyword = formatTime( timeRegExp.cap(1), QDateTime::currentDateTime() );
            resultHTML.replace( pos , timeRegExp.cap(0).length() , timeKeyword );
        }
        // Get contact image paths
        QString photoIncoming = photoForContact( remoteContact );
        QString photoOutgoing = photoForContact( d->manager->myself() );
        if( photoIncoming.isEmpty() )
        {
            photoIncoming = d->currentChatStyle->getStyleBaseHref() + QLatin1String("Incoming/buddy_icon.png");
        }

        if( photoOutgoing.isEmpty() )
        {
            photoOutgoing = d->currentChatStyle->getStyleBaseHref() + QLatin1String("Outgoing/buddy_icon.png");
        }

        resultHTML.replace( QLatin1String("%incomingIconPath%"), photoIncoming );
        resultHTML.replace( QLatin1String("%outgoingIconPath%"), photoOutgoing );
    }

    return resultHTML;
}

QString ChatMessagePart::formatTime(const QString &timeFormat, const QDateTime &dateTime)
{
    char buffer[256];

    time_t timeT;
    struct tm *loctime;
    // Get current time
    timeT = dateTime.toTime_t();
    // Convert it to local time representation.
    loctime = localtime (&timeT);
    strftime (buffer, 256, timeFormat.toAscii(), loctime);

    return QString(buffer);
}

QString ChatMessagePart::formatName(const