dom_docimpl.cpp

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

    case ID_SCRIPT:
        n = new HTMLScriptElementImpl(docPtr());
        break;

// tables
    case ID_TABLE:
        n = new HTMLTableElementImpl(docPtr());
        break;
    case ID_CAPTION:
        n = new HTMLTableCaptionElementImpl(docPtr());
        break;
    case ID_COLGROUP:
    case ID_COL:
        n = new HTMLTableColElementImpl(docPtr(), id);
        break;
    case ID_TR:
        n = new HTMLTableRowElementImpl(docPtr());
        break;
    case ID_TD:
    case ID_TH:
        n = new HTMLTableCellElementImpl(docPtr(), id);
        break;
    case ID_THEAD:
    case ID_TBODY:
    case ID_TFOOT:
        n = new HTMLTableSectionElementImpl(docPtr(), id, false);
        break;

// inline elements
    case ID_BR:
        n = new HTMLBRElementImpl(docPtr());
        break;
    case ID_Q:
        n = new HTMLGenericElementImpl(docPtr(), id);
        break;

// elements with no special representation in the DOM

// block:
    case ID_ADDRESS:
    case ID_CENTER:
        n = new HTMLGenericElementImpl(docPtr(), id);
        break;
// inline
        // %fontstyle
    case ID_TT:
    case ID_U:
    case ID_B:
    case ID_I:
    case ID_S:
    case ID_STRIKE:
    case ID_BIG:
    case ID_SMALL:

        // %phrase
    case ID_EM:
    case ID_STRONG:
    case ID_DFN:
    case ID_CODE:
    case ID_SAMP:
    case ID_KBD:
    case ID_VAR:
    case ID_CITE:
    case ID_ABBR:
    case ID_ACRONYM:

        // %special
    case ID_SUB:
    case ID_SUP:
    case ID_SPAN:
    case ID_NOBR:
    case ID_WBR:
        n = new HTMLGenericElementImpl(docPtr(), id);
        break;

    case ID_MARQUEE:
        n = new HTMLMarqueeElementImpl(docPtr());
        break;

    case ID_BDO:
        break;

// text
    case ID_TEXT:
        kdDebug( 6020 ) << "Use document->createTextNode()" << endl;
        break;

    default:
        break;
    }
    return n;
}

QString DocumentImpl::nextState()
{
   QString state;
   if (!m_state.isEmpty())
   {
      state = m_state.first();
      m_state.remove(m_state.begin());
   }
   return state;
}

QStringList DocumentImpl::docState()
{
    QStringList s;
    for (QPtrListIterator<NodeImpl> it(m_maintainsState); it.current(); ++it)
        s.append(it.current()->state());

    return s;
}

bool DocumentImpl::unsubmittedFormChanges()
{
    for (QPtrListIterator<NodeImpl> it(m_maintainsState); it.current(); ++it)
        if (it.current()->state().right(1)=="M")
            return true;

    return false;
}

RangeImpl *DocumentImpl::createRange()
{
    return new RangeImpl( docPtr() );
}

NodeIteratorImpl *DocumentImpl::createNodeIterator(NodeImpl *root, unsigned long whatToShow,
                                                   NodeFilter &filter, bool entityReferenceExpansion,
                                                   int &exceptioncode)
{
    if (!root) {
        exceptioncode = DOMException::NOT_SUPPORTED_ERR;
        return 0;
    }

    return new NodeIteratorImpl(root,whatToShow,filter,entityReferenceExpansion);
}

TreeWalkerImpl *DocumentImpl::createTreeWalker(NodeImpl *root, unsigned long whatToShow, NodeFilterImpl *filter,
                                bool entityReferenceExpansion, int &exceptioncode)
{
    if (!root) {
        exceptioncode = DOMException::NOT_SUPPORTED_ERR;
        return 0;
    }

    return new TreeWalkerImpl( root, whatToShow, filter, entityReferenceExpansion );
}

void DocumentImpl::setDocumentChanged(bool b)
{
    if (!changedDocuments)
        changedDocuments = s_changedDocumentsDeleter.setObject( changedDocuments, new QPtrList<DocumentImpl>() );

    if (b && !m_docChanged)
        changedDocuments->append(this);
    else if (!b && m_docChanged)
        changedDocuments->remove(this);
    m_docChanged = b;
}

void DocumentImpl::recalcStyle( StyleChange change )
{
//     qDebug("recalcStyle(%p)", this);
//     QTime qt;
//     qt.start();
    if (m_inStyleRecalc)
        return; // Guard against re-entrancy. -dwh

    m_inStyleRecalc = true;

    if( !m_render ) goto bail_out;

    if ( change == Force ) {
        RenderStyle* oldStyle = m_render->style();
        if ( oldStyle ) oldStyle->ref();
        RenderStyle* _style = new RenderStyle();
        _style->setDisplay(BLOCK);
        _style->setVisuallyOrdered( visuallyOrdered );
        // ### make the font stuff _really_ work!!!!

	khtml::FontDef fontDef;
	QFont f = KGlobalSettings::generalFont();
	fontDef.family = f.family();
	fontDef.italic = f.italic();
	fontDef.weight = f.weight();
        if (m_view) {
            const KHTMLSettings *settings = m_view->part()->settings();
	    QString stdfont = settings->stdFontName();
	    if ( !stdfont.isEmpty() )
		fontDef.family = stdfont;

            fontDef.size = m_styleSelector->fontSizes()[3];
        }

        //kdDebug() << "DocumentImpl::attach: setting to charset " << settings->charset() << endl;
        _style->setFontDef(fontDef);
	_style->htmlFont().update( paintDeviceMetrics() );
        if ( inCompatMode() )
            _style->setHtmlHacks(true); // enable html specific rendering tricks

        StyleChange ch = diff( _style, oldStyle );
        if(m_render && ch != NoChange)
            m_render->setStyle(_style);
	else
	    delete _style;
        if ( change != Force )
            change = ch;

        if (oldStyle)
            oldStyle->deref();
    }

    NodeImpl *n;
    for (n = _first; n; n = n->nextSibling())
        if ( change>= Inherit || n->hasChangedChild() || n->changed() )
            n->recalcStyle( change );
    //kdDebug( 6020 ) << "TIME: recalcStyle() dt=" << qt.elapsed() << endl;

    if (changed() && m_view)
	m_view->layout();

bail_out:
    setChanged( false );
    setHasChangedChild( false );
    setDocumentChanged( false );

    m_inStyleRecalc = false;
}

void DocumentImpl::updateRendering()
{
    if (!hasChangedChild()) return;

//     QTime time;
//     time.start();
//     kdDebug() << "UPDATERENDERING: "<<endl;

    StyleChange change = NoChange;
#if 0
    if ( m_styleSelectorDirty ) {
	recalcStyleSelector();
	change = Force;
    }
#endif
    recalcStyle( change );

//    kdDebug() << "UPDATERENDERING time used="<<time.elapsed()<<endl;
}

void DocumentImpl::updateDocumentsRendering()
{
    if (!changedDocuments)
        return;

    while ( !changedDocuments->isEmpty() ) {
        changedDocuments->first();
        DocumentImpl* it = changedDocuments->take();
        if (it->isDocumentChanged())
            it->updateRendering();
    }
}

void DocumentImpl::updateLayout()
{
    bool oldIgnore = m_ignorePendingStylesheets;

    if (!haveStylesheetsLoaded()) {
        m_ignorePendingStylesheets = true;
        updateStyleSelector();
    }

    updateRendering();

    // Only do a layout if changes have occurred that make it necessary.
    if (m_view && renderer() && renderer()->needsLayout())
	m_view->layout();

    m_ignorePendingStylesheets = oldIgnore;
}

void DocumentImpl::attach()
{
    assert(!attached());

    if ( m_view )
        setPaintDevice( m_view );

    if (!m_renderArena)
	m_renderArena = new RenderArena();

    // Create the rendering tree
    assert(!m_styleSelector);
    m_styleSelector = new CSSStyleSelector( this, m_usersheet, m_styleSheets, m_url,
                                            !inCompatMode() );
    m_render = new (m_renderArena) RenderCanvas(this, m_view);
    m_styleSelector->computeFontSizes(paintDeviceMetrics(), m_view ? m_view->part()->zoomFactor() : 100);
    recalcStyle( Force );

    RenderObject* render = m_render;
    m_render = 0;

    NodeBaseImpl::attach();
    m_render = render;
}

void DocumentImpl::detach()
{
    RenderObject* render = m_render;

    // indicate destruction mode,  i.e. attached() but m_render == 0
    m_render = 0;

    delete m_tokenizer;
    m_tokenizer = 0;

    // Empty out these lists as a performance optimization
    m_imageLoadEventDispatchSoonList.clear();
    m_imageLoadEventDispatchingList.clear();
    NodeBaseImpl::detach();

    if ( render )
        render->detach();

    m_view = 0;

    if ( m_renderArena ) {
	delete m_renderArena;
	m_renderArena = 0;
    }
}

void DocumentImpl::setVisuallyOrdered()
{
    visuallyOrdered = true;
    if (m_render)
        m_render->style()->setVisuallyOrdered(true);
}

void DocumentImpl::setSelection(NodeImpl* s, int sp, NodeImpl* e, int ep)
{
    if ( m_render )
        static_cast<RenderCanvas*>(m_render)->setSelection(s->renderer(),sp,e->renderer(),ep);
}

void DocumentImpl::clearSelection()
{
    if ( m_render )
        static_cast<RenderCanvas*>(m_render)->clearSelection();
}

khtml::Tokenizer *DocumentImpl::createTokenizer()
{
    return new khtml::XMLTokenizer(docPtr(),m_view);
}

void DocumentImpl::setPaintDevice( QPaintDevice *dev )
{
    if (m_paintDevice != dev) {
        m_paintDevice = dev;
        delete m_paintDeviceMetrics;
        m_paintDeviceMetrics = new QPaintDeviceMetrics( dev );
    }
}

void DocumentImpl::open( bool clearEventListeners )
{
    if (parsing()) return;

    if (m_tokenizer)
        close();

    delete m_tokenizer;
    m_tokenizer = 0;

    KHTMLView* view = m_view;
    bool was_attached = attached();
    if ( was_attached )
        detach();

    removeChildren();
    delete m_styleSelector;
    m_styleSelector = 0;
    m_view = view;
    if ( was_attached )
        attach();

    if (clearEventListeners)
        m_windowEventListeners.clear();

    m_tokenizer = createTokenizer();
    m_decoderMibEnum = 0;
    connect(m_tokenizer,SIGNAL(finishedParsing()),this,SIGNAL(finishedParsing()));
    m_tokenizer->begin();
}

HTMLElementImpl* DocumentImpl::body()
{
    NodeImpl *de = documentElement();
    if (!de)
        return 0;

    // try to prefer a FRAMESET element over BODY
    NodeImpl* body = 0;
    for (NodeImpl* i = de->firstChild(); i; i = i->nextSibling()) {
        if (i->id() == ID_FRAMESET)
            return static_cast<HTMLElementImpl*>(i);

        if (i->id() == ID_BODY)
            body = i;
    }
    return static_cast<HTMLElementImpl *>(body);
}

void DocumentImpl::close(  )
{
    if (parsing() || !m_tokenizer) return;

    if ( m_render )
        m_render->close();

    // on an explicit document.close(), the tokenizer might still be waiting on scripts,
    // and in that case we don't want to destroy it because that will prevent the
    // scripts from getting processed.
    if (m_tokenizer && !m_tokenizer->isWaitingForScripts() && !m_tokenizer->isExecutingScript()) {
        delete m_tokenizer;
        m_tokenizer = 0;
    }

    if (m_view)
        m_view->part()->checkEmitLoadEvent();
}

void DocumentImpl::write( const DOMString &text )
{