loader.cpp

konqueror3 embedded版本, KDE环境下的当家浏览器的嵌入式版本源码包.

        for (int x = 0; x < w; x += r.width())
            copyBlt(bg, x, 0, &r, 0, 0, r.width(), r.height());

        //Copy first stripe down
        for (int y = r.height(); y < h; y += r.height())
            copyBlt(bg, 0, y, bg, 0, 0, w, r.height());

        return *bg;
    }
#endif

    if (
#ifdef Q_WS_X11
        !r.hasAlphaChannel() &&
#endif
        ( (w != r.width()) || (h != r.height()) || (isvalid && r.mask())) )
    {
        QPixmap pix = r;
        if ( w != r.width() || (isvalid && pix.mask()))
        {
            bg = new QPixmap(w, r.height());
            QPainter p(bg);
            if(isvalid) p.fillRect(0, 0, w, r.height(), newc);
            p.drawTiledPixmap(0, 0, w, r.height(), pix);
            p.end();

            if(!isvalid && pix.mask())
            {
                // unfortunately our anti-transparency trick doesn't work here
                // we need to create a mask.
                QBitmap newmask(w, r.height());
                QPainter pm(&newmask);
                pm.drawTiledPixmap(0, 0, w, r.height(), *pix.mask());
                bg->setMask(newmask);
                bgColor = bgTransparant;
            }
            else
                bgColor= newc.rgb();
            pix = *bg;
        }
        if ( h != r.height() )
        {
            delete bg;
            bg = new QPixmap(w, h);
            QPainter p(bg);
            if(isvalid) p.fillRect(0, 0, w, h, newc);
            p.drawTiledPixmap(0, 0, w, h, pix);
            if(!isvalid && pix.mask())
            {
                // unfortunately our anti-transparency trick doesn't work here
                // we need to create a mask.
                QBitmap newmask(w, h);
                QPainter pm(&newmask);
                pm.drawTiledPixmap(0, 0, w, h, *pix.mask());
                bg->setMask(newmask);
                bgColor = bgTransparant;
            }
            else
                bgColor= newc.rgb();
        }
        return *bg;
    }

    return r;
}

const QPixmap &CachedImage::pixmap( ) const
{
    if(m_hadError)
        return *Cache::brokenPixmap;

    if(m_wasBlocked)
        return *Cache::blockedPixmap;

    if(m)
    {
        if(m->framePixmap().size() != m->getValidRect().size())
        {
            // pixmap is not yet completely loaded, so we
            // return a clipped version. asserting here
            // that the valid rect is always from 0/0 to fullwidth/ someheight
            if(!pixPart) pixPart = new QPixmap();

            (*pixPart) = m->framePixmap();
            if (m->getValidRect().size().isValid())
                pixPart->resize(m->getValidRect().size());
            else
                pixPart->resize(0, 0);
            return *pixPart;
        }
        else
            return m->framePixmap();
    }
    else if(p)
        return *p;

    return *Cache::nullPixmap;
}


QSize CachedImage::pixmap_size() const
{
    if (m_wasBlocked) return Cache::blockedPixmap->size();
    return (m_hadError ? Cache::brokenPixmap->size() : m ? m->framePixmap().size() : ( p ? p->size() : QSize()));
}


QRect CachedImage::valid_rect() const
{
    if (m_wasBlocked) return Cache::blockedPixmap->rect();
    return (m_hadError ? Cache::brokenPixmap->rect() : m ? m->getValidRect() : ( p ? p->rect() : QRect()) );
}


void CachedImage::do_notify(const QPixmap& p, const QRect& r)
{
    for (QPtrDictIterator<CachedObjectClient> it( m_clients ); it.current();)
        it()->setPixmap( p, r, this);
}


void CachedImage::movieUpdated( const QRect& r )
{
#ifdef LOADER_DEBUG
    qDebug("movie updated %d/%d/%d/%d, pixmap size %d/%d", r.x(), r.y(), r.right(), r.bottom(),
           m->framePixmap().size().width(), m->framePixmap().size().height());
#endif

    do_notify(m->framePixmap(), r);
}

void CachedImage::movieStatus(int status)
{
#ifdef LOADER_DEBUG
    qDebug("movieStatus(%d)", status);
#endif

    // ### the html image objects are supposed to send the load event after every frame (according to
    // netscape). We have a problem though where an image is present, and js code creates a new Image object,
    // which uses the same CachedImage, the one in the document is not supposed to be notified

    // just another Qt 2.2.0 bug. we cannot call
    // QMovie::frameImage if we're after QMovie::EndOfMovie
    if(status == QMovie::EndOfFrame)
    {
        const QImage& im = m->frameImage();
        monochrome = ( ( im.depth() <= 8 ) && ( im.numColors() - int( im.hasAlphaBuffer() ) <= 2 ) );
        for (int i = 0; monochrome && i < im.numColors(); ++i)
            if (im.colorTable()[i] != qRgb(0xff, 0xff, 0xff) &&
                im.colorTable()[i] != qRgb(0x00, 0x00, 0x00))
                monochrome = false;
        if( (im.width() < 5 || im.height() < 5) && im.hasAlphaBuffer()) // only evaluate for small images
        {
            QImage am = im.createAlphaMask();
            if(am.depth() == 1)
            {
                bool solid = false;
                for(int y = 0; y < am.height(); y++)
                    for(int x = 0; x < am.width(); x++)
                        if(am.pixelIndex(x, y)) {
                            solid = true;
                            break;
                        }
                isFullyTransparent = (!solid);
            }
        }

        // we have to delete our tiled bg variant here
        // because the frame has changed (in order to keep it in sync)
        delete bg;
        bg = 0;
    }

    if((status == QMovie::EndOfMovie && (!m || m->frameNumber() <= 1)) ||
       ((status == QMovie::EndOfLoop) && (m_showAnimations == KHTMLSettings::KAnimationLoopOnce)) ||
       ((status == QMovie::EndOfFrame) && (m_showAnimations == KHTMLSettings::KAnimationDisabled))
      )
    {
        if(imgSource)
        {
            setShowAnimations( KHTMLSettings::KAnimationDisabled );

            // monochrome alphamasked images are usually about 10000 times
            // faster to draw, so this is worth the hack
            if (p && monochrome && p->depth() > 1)
            {
                QPixmap* pix = new QPixmap;
                pix->convertFromImage( p->convertToImage().convertDepth( 1 ), MonoOnly|AvoidDither );
                if ( p->mask() )
                    pix->setMask( *p->mask() );
                delete p;
                p = pix;
                monochrome = false;
            }
        }
        for (QPtrDictIterator<CachedObjectClient> it( m_clients ); it.current();)
            it()->notifyFinished( this );
	m_status = Cached; //all done
    }

#if 0
    if((status == QMovie::EndOfFrame) || (status == QMovie::EndOfMovie))
    {
#ifdef LOADER_DEBUG
        QRect r(valid_rect());
        qDebug("movie Status frame update %d/%d/%d/%d, pixmap size %d/%d", r.x(), r.y(), r.right(), r.bottom(),
               pixmap().size().width(), pixmap().size().height());
#endif
        do_notify(pixmap(), valid_rect());
    }
#endif
}

void CachedImage::movieResize(const QSize& /*s*/)
{
    do_notify(m->framePixmap(), QRect());
}

void CachedImage::setShowAnimations( KHTMLSettings::KAnimationAdvice showAnimations )
{
    m_showAnimations = showAnimations;
    if ( (m_showAnimations == KHTMLSettings::KAnimationDisabled) && imgSource ) {
        imgSource->cleanBuffer();
        delete p;
        p = new QPixmap(m->framePixmap());
        m->disconnectUpdate( this, SLOT( movieUpdated( const QRect &) ));
        m->disconnectStatus( this, SLOT( movieStatus( int ) ));
        m->disconnectResize( this, SLOT( movieResize( const QSize& ) ) );
        QTimer::singleShot(0, this, SLOT( deleteMovie()));
        imgSource = 0;
    }
}

void CachedImage::deleteMovie()
{
    delete m; m = 0;
}

void CachedImage::clear()
{
    delete m;   m = 0;
    delete p;   p = 0;
    delete bg;  bg = 0;
    bgColor = qRgba( 0, 0, 0, 0xff );
    delete pixPart; pixPart = 0;

    formatType = 0;
    typeChecked = false;
    setSize(0);

    // No need to delete imageSource - QMovie does it for us
    imgSource = 0;
}

void CachedImage::data ( QBuffer &_buffer, bool eof )
{
#ifdef LOADER_DEBUG
    kdDebug( 6060 ) << this << "in CachedImage::data(buffersize " << _buffer.buffer().size() <<", eof=" << eof << endl;
#endif
    if ( !typeChecked )
    {
        // don't attempt incremental loading if we have all the data already
        assert(!eof);

        formatType = QImageDecoder::formatName( (const uchar*)_buffer.buffer().data(), _buffer.size());
        if ( formatType && strcmp( formatType, "PNG" ) == 0 )
            formatType = 0; // Some png files contain multiple images, we want to show only the first one

        typeChecked = true;

        if ( formatType )  // movie format exists
        {
            imgSource = new ImageSource( _buffer.buffer());
            m = new QMovie( imgSource, 8192 );
            m->connectUpdate( this, SLOT( movieUpdated( const QRect &) ));
            m->connectStatus( this, SLOT( movieStatus(int)));
            m->connectResize( this, SLOT( movieResize( const QSize& ) ) );
        }
    }

    if ( imgSource )
    {
        imgSource->setEOF(eof);
        imgSource->maybeReady();
    }

    if(eof)
    {
        // QMovie currently doesn't support all kinds of image formats
        // so we need to use a QPixmap here when we finished loading the complete
        // picture and display it then all at once.
        if(typeChecked && !formatType)
        {
#ifdef CACHE_DEBUG
            kdDebug(6060) << "CachedImage::data(): reloading as pixmap:" << endl;
#endif
            p = new QPixmap;
            {
            	QBuffer buffer(_buffer.buffer());
            	buffer.open(IO_ReadOnly);
                QImageIO io( &buffer, 0 );
                io.setGamma(2.2); // hardcoded "reasonable value"
                bool result = io.read();
                if (result) p->convertFromImage(io.image(), 0);
            }

            // set size of image.
#ifdef CACHE_DEBUG
            kdDebug(6060) << "CachedImage::data(): image is null: " << p->isNull() << endl;
#endif
            if(p->isNull())
            {
                m_hadError = true;
                do_notify(pixmap(), QRect(0, 0, 16, 16)); // load "broken image" icon
            }
            else
                do_notify(*p, p->rect());

            for (QPtrDictIterator<CachedObjectClient> it( m_clients ); it.current();)
                it()->notifyFinished( this );
            m_status = Cached; //all done
        }
    }
}

void CachedImage::finish()
{
    Status oldStatus = m_status;
    CachedObject::finish();
    if ( oldStatus != m_status ) {
	const QPixmap &pm = pixmap();
	do_notify( pm, pm.rect() );
    }
    QSize s = pixmap_size();
    setSize( s.width() * s.height() * 2);
}


void CachedImage::error( int /*err*/, const char* /*text*/ )
{
    clear();
    typeChecked = true;
    m_hadError = true;
    m_loading = false;
    do_notify(pixmap(), QRect(0, 0, 16, 16));
    for (QPtrDictIterator<CachedObjectClient> it( m_clients ); it.current();)
        it()->notifyFinished(this);
}

// ------------------------------------------------------------------------------------------

Request::Request(DocLoader* dl, CachedObject *_object, bool _incremental)
{
    object = _object;
    object->setRequest(this);
    incremental = _incremental;
    m_docLoader = dl;
}

Request::~Request()
{
    object->setRequest(0);
}

// ------------------------------------------------------------------------------------------

DocLoader::DocLoader(KHTMLPart* part, DocumentImpl* doc)
{
    m_cachePolicy = KIO::CC_Verify;
    m_expireDate = 0;
    m_creationDate = time(0);
    m_bautoloadImages = true;
    m_showAnimations = KHTMLSettings::KAnimationEnabled;
    m_part = part;
    m_doc = doc;

    Cache::docloader->append( this );
}

DocLoader::~DocLoader()
{
    Cache::loader()->cancelRequests( this );
    Cache::docloader->remove( this );
}

void DocLoader::setCacheCreationDate(time_t _creationDate)
{
    if (_creationDate)
       m_creationDate = _creationDate;
    else
       m_creationDate = time(0); // Now
}

void DocLoader::setExpireDate(time_t _expireDate, bool relative)
{
    if (relative)
       m_expireDate = _expireDate + m_creationDate; // Relative date
    else
       m_expireDate = _expireDate; // Absolute date
#ifdef CACHE_DEBUG
    kdDebug(6061) << "docLoader: " << m_expireDate - time(0) << " seconds left until reload required.\n";
#endif
}

void DocLoader::insertCachedObject( CachedObject* o ) const
{
    if ( m_docObjects.find(o) )
        return;
    m_docObjects.insert( o, o );
    if ( m_docObjects.count() > 3 * m_docObjects.size() )
        m_docObjects.resize(khtml::nextSeed( m_docObjects.size() ) );
}

bool DocLoader::needReload(CachedObject *existing, const QString& fullURL)
{
    bool reload = false;
    if (m_cachePolicy == KIO::CC_Verify)
    {
       if (!m_reloadedURLs.contains(fullURL))
       {
          if (existing && existing->isExpired())
          {
             Cache::removeCacheEntry(existing);
             m_reloadedURLs.append(fullURL);
             reload = true;
          }
       }
    }
    else if ((m_cachePolicy == KIO::CC_Reload) || (m_cachePolicy == KIO::CC_Refresh))
    {
       if (!m_reloadedURLs.contains(fullURL))
       {
          if (existing)
          {
             Cache::removeCacheEntry(existing);
          }
          m_reloadedURLs.append(fullURL);
          reload = true;
       }
    }
    return reload;
}

#define DOCLOADER_SECCHECK(doRedirectCheck) \
    KURL fullURL (m_doc->completeURL( url.string() )); \
    if ( !fullURL.isValid() || \
         ( m_part && m_part->onlyLocalReferences() && fullURL.protocol() != "file" && fullURL.protocol() != "data") || \
         doRedirectCheck && ( kapp && m_doc && !kapp->authorizeURLAction("redirect", m_doc->URL(), fullURL))) \
         return 0L;

CachedImage *DocLoader::requestImage( const DOM::DOMString &url)
{
    DOCLOADER_SECCHECK(true);

    CachedImage* i = Cache::requestObject<CachedImage, CachedObject::Image>( this, fullURL, 0);

    if (i && i->status() == CachedObject::Unknown && autoloadImages())
        Cache::loader()->load(this, i, true);

    return i;
}

CachedCSSStyleSheet *DocLoader::requestStyleSheet( const DOM::DOMString &url, const QString& charset,
						   const char *accept, bool userSheet )
{
    DOCLOADER_SECCHECK(!userSheet);

    CachedCSSStyleSheet* s = Cache::requestObject<CachedCSSStyleSheet, CachedObject::CSSStyleSheet>( this, fullURL, accept );
    if ( s && !charset.isEmpty() ) {
        s->setCharset( charset );
    }
    return s;
}

CachedScript *DocLoader::requestScript( const DOM::DOMString &url, const QString& charset)
{
    DOCLOADER_SECCHECK(true);
    if ( ! KHTMLFactory::defaultHTMLSettings()->isJavaScriptEnabled(fullURL.host()) ||
           KHTMLFactory::defaultHTMLSettings()->isAdFiltered(fullURL.url()))
	return 0L;

    CachedScript* s = Cache::requestObject<CachedScript, CachedObject::Script>( this, fullURL, 0 );
    if ( s && !charset.isEmpty() )
        s->setCharset( charset );
    return s;
}

#undef DOCLOADER_SECCHECK

void DocLoader::setAutoloadImages( bool enable )
{
    if ( enable == m_bautoloadImages )
        return;

    m_bautoloadImages = enable;

    if ( !m_bautoloadImages ) return;

    for ( QPtrDictIterator<CachedObject> it( m_docObjects ); it.current(); ++it )
        if ( it.current()->type() == CachedObject::Image )
        {
            CachedImage *img = const_cast<CachedImage*>( static_cast<const CachedImage *>( it.current()) );

            CachedObject::Status status = img->status();
            if ( status != CachedObject::Unknown )
                continue;

            Cache::loader()->load(this, img, true);
        }
}

void DocLoader::setShowAnimations( KHTMLSettings::KAnimationAdvice showAnimations )
{
    if ( showAnimations == m_showAnimations ) return;
    m_showAnimations = showAnimations;

    for ( QPtrDictIterator<CachedObject> it( m_docObjects ); it.current(); ++it )
        if ( it.current()->type() == CachedObject::Image )
        {
            CachedImage *img = const_cast<CachedImage*>( static_cast<const CachedImage *>( it.current() ) );

            img->setShowAnimations( m_showAnimations );
        }
}

// ------------------------------------------------------------------------------------------