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kopete/kopete

chattexteditpart.cpp

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/*
    chattexteditpart.cpp - Chat Text Edit Part

    Copyright (c) 2004      by Richard Smith         <kde@metafoo.co.uk>

    Kopete    (c) 2002-2004 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 "chattexteditpart.h"

#include "kopetecontact.h"
#include "kopetechatsession.h"
#include "kopeteonlinestatus.h"
#include "kopeteprotocol.h"
#include "kopeteglobal.h"
#include <kopeteappearancesettings.h>

#include <kcompletion.h>
#include <kdebug.h>
#include <ktextedit.h>

#include <QtCore/QTimer>
#include <QtCore/QRegExp>

ChatTextEditPart::ChatTextEditPart( Kopete::ChatSession *session, QWidget *parent )
    : KRichTextEditPart(parent, 0, QStringList()), m_session(session)
{
    // Set rich support in the part
    setProtocolRichTextSupport();

    historyPos = -1;
    
    mComplete = new KCompletion();
    mComplete->setIgnoreCase( true );
    mComplete->setOrder( KCompletion::Weighted );
    
    // set params on the edit widget
    textEdit()->setMinimumSize( QSize( 75, 20 ) );
//  textEdit()->setWordWrap( Q3TextEdit::WidgetWidth );
//  textEdit()->setWrapPolicy( Q3TextEdit::AtWhiteSpace );
//  textEdit()->setAutoFormatting( Q3TextEdit::AutoNone );

    // some signals and slots connections
    connect( textEdit(), SIGNAL( textChanged()), this, SLOT( slotTextChanged() ) );

    // timers for typing notifications
    m_typingRepeatTimer = new QTimer(this);
    m_typingRepeatTimer->setObjectName("m_typingRepeatTimer");
    m_typingStopTimer   = new QTimer(this);
    m_typingStopTimer->setObjectName("m_typingStopTimer");

    connect( m_typingRepeatTimer, SIGNAL( timeout() ), this, SLOT( slotRepeatTypingTimer() ) );
    connect( m_typingStopTimer,   SIGNAL( timeout() ), this, SLOT( slotStoppedTypingTimer() ) );

    connect( session, SIGNAL( contactAdded(const Kopete::Contact*, bool) ),
             this, SLOT( slotContactAdded(const Kopete::Contact*) ) );
    connect( session, SIGNAL( contactRemoved(const Kopete::Contact*, const QString&, Qt::TextFormat, bool) ),
             this, SLOT( slotContactRemoved(const Kopete::Contact*) ) );
    connect( session, SIGNAL( onlineStatusChanged( Kopete::Contact *, const Kopete::OnlineStatus & , const Kopete::OnlineStatus &) ),
             this, SLOT( slotContactStatusChanged( Kopete::Contact *, const Kopete::OnlineStatus &, const Kopete::OnlineStatus & ) ) );

    connect( Kopete::AppearanceSettings::self(), SIGNAL( appearanceChanged() ),
             this, SLOT( slotAppearanceChanged() ) );
    
    connect( KGlobalSettings::self(), SIGNAL( kdisplayFontChanged() ),
             this, SLOT( slotAppearanceChanged() ) );

    slotAppearanceChanged();

    slotContactAdded( session->myself() );

    foreach( Kopete::Contact *contact, session->members() )
        slotContactAdded( contact );
}

ChatTextEditPart::~ChatTextEditPart()
{
    delete mComplete;
}

// NAUGHTY, BAD AND WRONG! (but needed to fix nick complete bugs)
/*
#include <private/qrichtext_p.h>
class EvilTextEdit : public KTextEdit
{
public:
    // grab the paragraph as plain text - very very evil.
    QString plainText( int para )
    {
        QString str = document()->paragAt( para )->string()->toString();
        // str includes an extra space on the end (from the newline character?) - remove it
        return str.left( str.length() - 1 );
    }
};
*/
void ChatTextEditPart::complete()
{
#ifdef __GNUC__
#warning disabled nick completion to make it compile
#endif
#if 0
    int para = 1, parIdx = 1;
    textEdit()->getCursorPosition( &para, &parIdx);

    // FIXME: strips out all formatting
//QString txt = static_cast<EvilTextEdit*>(textEdit())->plainText( para );
    QString txt = textEdit()->text(para);

    if ( parIdx > 0 )
    {
        int firstSpace = txt.lastIndexOf( QRegExp( QLatin1String("\\s\\S+") ), parIdx - 1 ) + 1;
        int lastSpace = txt.find( QRegExp( QLatin1String("[\\s\\:]") ), firstSpace );
        if( lastSpace == -1 )
            lastSpace = txt.length();

        QString word = txt.mid( firstSpace, lastSpace - firstSpace );
        QString match;

        kDebug(14000) << word << " from '" << txt << "'";

        if ( word != m_lastMatch )
        {
            match = mComplete->makeCompletion( word );
            m_lastMatch.clear();
            parIdx -= word.length();
        }
        else
        {
            match = mComplete->nextMatch();
            parIdx -= m_lastMatch.length();
        }

        if ( !match.isNull() && !match.isEmpty() )
        {
            QString rightText = txt.right( txt.length() - lastSpace );

            if ( para == 0 && firstSpace == 0 && rightText[0] != QChar(':') )
            {
                rightText = match + QLatin1String(": ") + rightText;
                parIdx += 2;
            }
            else
                rightText = match + rightText;

            // insert *before* remove. this is becase Qt adds an extra blank line
            // if the rich text control becomes empty (if you remove the only para).
            // disable updates while we change the contents to eliminate flicker.
            textEdit()->setUpdatesEnabled( false );
            textEdit()->insertParagraph( txt.left(firstSpace) + rightText, para );
            textEdit()->removeParagraph( para + 1 );
            textEdit()->setCursorPosition( para, parIdx + match.length() );
            textEdit()->setUpdatesEnabled( true );
            // must call this rather than update because QTextEdit is broken :(
            textEdit()->updateContents();
            m_lastMatch = match;
        }
        else
        {
            kDebug(14000) << "No completions! Tried " << mComplete->items();
        }
    }
#endif
}

void ChatTextEditPart::slotPropertyChanged( Kopete::PropertyContainer*, const QString &key,
        const QVariant& oldValue, const QVariant &newValue  )
{
    if ( key == Kopete::Global::Properties::self()->nickName().key() )
    {
        mComplete->removeItem( oldValue.toString() );
        mComplete->addItem( newValue.toString() );
    }
}

void ChatTextEditPart::slotContactAdded( const Kopete::Contact *contact )
{
    connect( contact, SIGNAL( propertyChanged( Kopete::PropertyContainer *, const QString &, const QVariant &, const QVariant & ) ),
             this, SLOT( slotPropertyChanged( Kopete::PropertyContainer *, const QString &, const QVariant &, const QVariant & ) ) ) ;
    
    QString contactName = contact->property(Kopete::Global::Properties::self()->nickName()).value().toString();
    mComplete->addItem( contactName );
}

void ChatTextEditPart::slotContactRemoved( const Kopete::Contact *contact )
{
    disconnect( contact, SIGNAL( propertyChanged( Kopete::PropertyContainer *, const QString &, const QVariant &, const QVariant & ) ),
                this, SLOT( slotPropertyChanged( Kopete::PropertyContainer *, const QString &, const QVariant &, const QVariant & ) ) ) ;
    
    QString contactName = contact->property(Kopete::Global::Properties::self()->nickName()).value().toString();
    mComplete->removeItem( contactName );
}

bool ChatTextEditPart::canSend()
{
    int i;
    
    if ( !m_session ) return false;

    // can't send if there's nothing *to* send...
    if ( text(Qt::PlainText).isEmpty() )
        return false;

    Kopete::ContactPtrList members = m_session->members();
    
    // if we can't send offline, make sure we have a reachable contact...
    if ( !( m_session->protocol()->capabilities() & Kopete::Protocol::CanSendOffline ) )
    {
        bool reachableContactFound = false;

        //TODO: does this perform badly in large / busy IRC channels? - no, doesn't seem to
        for( i = 0; i != members.size(); i++ )
        {
            if ( members[i]->isReachable() )
            {
                reachableContactFound = true;
                break;
            }
        }

        // no online contact found and can't send offline? can't send.
        if ( !reachableContactFound )
            return false;
    }

    return true;
}

void ChatTextEditPart::slotContactStatusChanged( Kopete::Contact *, const Kopete::OnlineStatus &newStatus, const Kopete::OnlineStatus &oldStatus )
{
    //FIXME: should use signal contact->isReachableChanged, but it doesn't exist ;(
    if ( ( oldStatus.status() == Kopete::OnlineStatus::Offline )
      != ( newStatus.status() == Kopete::OnlineStatus::Offline ) )
    {
        emit canSendChanged( canSend() );
    }
}

void ChatTextEditPart::sendMessage()
{
    QString txt = this->text( Qt::PlainText );
    // avoid sending emtpy messages or enter keys (see bug 100334)
    if ( txt.isEmpty() || txt == "\n" )
        return;

    if ( m_lastMatch.isNull() && ( txt.indexOf( QRegExp( QLatin1String("^\\w+:\\s") ) ) > -1 ) )
    { //no last match and it finds something of the form of "word:" at the start of a line
        QString search = txt.left( txt.indexOf(':') );
        if( !search.isEmpty() )
        {
            QString match = mComplete->makeCompletion( search );
            if( !match.isNull() )
                textEdit()->setText( txt.replace(0,search.length(),match) );
        }
    }

    if ( !m_lastMatch.isNull() )
    {
        //FIXME: what is the next line for?
        mComplete->addItem( m_lastMatch );
        m_lastMatch.clear();
    }

    slotStoppedTypingTimer();
    Kopete::Message sentMessage = contents();
    emit messageSent( sentMessage );
    historyList.prepend( this->text( Qt::PlainText) );
    historyPos = -1;
    clear();
    emit canSendChanged( false );
}

bool ChatTextEditPart::isTyping()
{
    QString txt = text( Qt::PlainText );

    //Make sure the message is empty. QString::isEmpty()
    //returns false if a message contains just whitespace
    //which is the reason why we strip the whitespace   
    return !txt.trimmed().isEmpty();
}

void ChatTextEditPart::slotTextChanged()
{
    if ( isTyping() )
    {
        // And they were previously typing
        if( !m_typingRepeatTimer->isActive() )
        {
            m_typingRepeatTimer->setSingleShot( false );
            m_typingRepeatTimer->start( 4000 );
            slotRepeatTypingTimer();
        }

        // Reset the stop timer again, regardless of status
        m_typingStopTimer->setSingleShot( true );
        m_typingStopTimer->start( 4500 );
    }

    emit canSendChanged( canSend() );
}

void ChatTextEditPart::historyUp()
{
    if ( historyList.empty() || historyPos == historyList.count() - 1 )
        return;
    
    QString text = this->text(Qt::PlainText);
    bool empty = text.trimmed().isEmpty();
    
    // got text? save it
    if ( !empty )
    {
        if ( historyPos == -1 )
        {
            historyList.prepend( text );
            historyPos = 0;
        }
        else
        {
            historyList[historyPos] = text;
        }
    }
    
    historyPos++;
    
    QString newText = historyList[historyPos];
//  TextFormat format=textEdit()->textFormat();
//  textEdit()->setTextFormat(AutoText); //workaround bug 115690
    textEdit()->setText( newText );
//  textEdit()->setTextFormat(format);
    textEdit()->moveCursor( QTextCursor::End );
}

void ChatTextEditPart::historyDown()
{
    if ( historyList.empty() || historyPos == -1 )
        return;
    
    QString text = this->text(Qt::PlainText);
    bool empty = text.trimmed().isEmpty();
    
    // got text? save it
    if ( !empty )
    {
        historyList[historyPos] = text;
    }
    
    historyPos--;
    
    QString newText = ( historyPos >= 0 ? historyList[historyPos] : QString() );
    
    
//  TextFormat format=textEdit()->textFormat();
//  textEdit()->setTextFormat(AutoText); //workaround bug 115690
    textEdit()->setText( newText );
//  textEdit()->setTextFormat(format);
    textEdit()->moveCursor( QTextCursor::End );
}

void ChatTextEditPart::addText( const QString &text )
{
    if( Qt::mightBeRichText(text) )
    {
        textEdit()->insertHtml( text );
    }
    else
    {
        textEdit()->insertPlainText( text );
    }
}

void ChatTextEditPart::setContents( const Kopete::Message &message )
{
    if ( useRichText() )
        textEdit()->setHtml ( message.escapedBody() );
    else
        textEdit()->setPlainText ( message.plainBody() );
    textEdit()->moveCursor ( QTextCursor::End );
    
    setFont( message.font() );
    setTextColor( message.foregroundColor() );
//  setBackgroundColorColor( message.backgroundColor() );
}

Kopete::Message ChatTextEditPart::contents()
{
    Kopete::Message currentMsg( m_session->myself(), m_session->members() );
    currentMsg.setDirection( Kopete::Message::Outbound );
    useRichText() ? currentMsg.setHtmlBody( text() ) : currentMsg.setPlainBody( text() );
    
//  currentMsg.setBackgroundColor( bgColor() );
    currentMsg.setForegroundColor( textColor() );
    currentMsg.setFont( font() );
    
    return currentMsg;
}

void ChatTextEditPart::slotRepeatTypingTimer()
{
    emit typing( true );
}

void ChatTextEditPart::slotStoppedTypingTimer()
{
    m_typingRepeatTimer->stop();
    m_typingStopTimer->stop();
    emit typing( false );
}

void ChatTextEditPart::slotAppearanceChanged()
{
    Kopete::AppearanceSettings *settings = Kopete::AppearanceSettings::self();

    QFont chatFont = KGlobalSettings::generalFont();
    if ( settings->chatFontSelection() == 1 )
        chatFont = settings->chatFont();

    setFont( chatFont );
}

void ChatTextEditPart::setProtocolRichTextSupport()
{
    KRichTextEditPart::RichTextSupport richText;
    Kopete::Protocol::Capabilities protocolCaps = m_session->protocol()->capabilities();

    // Check for bold
    if( (protocolCaps & Kopete::Protocol::BaseBFormatting) || (protocolCaps & Kopete::Protocol::RichBFormatting) )
    {
        richText |= KRichTextEditPart::SupportBold;
    }
    // Check for italic
    if( (protocolCaps & Kopete::Protocol::BaseIFormatting) || (protocolCaps & Kopete::Protocol::RichIFormatting) )
    {
        richText |= KRichTextEditPart::SupportItalic;
    }
    // Check for underline
    if( (protocolCaps & Kopete::Protocol::BaseUFormatting) || (protocolCaps & Kopete::Protocol::RichUFormatting) )
    {
        richText |= KRichTextEditPart::SupportUnderline;
    }
    // Check for font support
    if( (protocolCaps & Kopete::Protocol::BaseFont) || (protocolCaps & Kopete::Protocol::RichFont) )
    {
        richText |= KRichTextEditPart::SupportFont;
    }
    // Check for text color support
    if( (protocolCaps & Kopete::Protocol::BaseFgColor) || (protocolCaps & Kopete::Protocol::RichFgColor) )
    {
        richText |= KRichTextEditPart::SupportTextColor;
    }
    // Check for alignment
    if( protocolCaps & Kopete::Protocol::Alignment )
    {
        richText |= KRichTextEditPart::SupportAlignment;
    }

    // Set rich text support in KRichTextEditPart
    setRichTextSupport( richText );
}

#include "chattexteditpart.moc"

// vim: set noet ts=4 sts=4 sw=4:

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