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.

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typedef const char* (*NameLookupFunction)(unsigned short id);
typedef int (*IdLookupFunction)(const char *tagStr, int len);

NodeImpl::Id DocumentImpl::getId( NodeImpl::IdType _type, DOMStringImpl* _nsURI, DOMStringImpl *_prefix,
                                  DOMStringImpl *_name, bool readonly, bool /*lookupHTML*/, int *pExceptioncode)
{
    /*kdDebug() << "DocumentImpl::getId( type: " << _type << ", uri: " << DOMString(_nsURI).string()
              << ", prefix: " << DOMString(_prefix).string() << ", name: " << DOMString(_name).string()
              << ", readonly: " << readonly
              << ", lookupHTML: " << lookupHTML
              << ", exceptions: " << (pExceptioncode ? "yes" : "no")
              << " )" << endl;*/

    if(!_name || !_name->l) return 0;
    IdNameMapping *map;
    IdLookupFunction lookup;

    switch (_type) {
    case NodeImpl::ElementId:
        map = m_elementMap;
        lookup = getTagID;
        break;
    case NodeImpl::AttributeId:
        map = m_attrMap;
        lookup = getAttrID;
        break;
    case NodeImpl::NamespaceId:
        if( !strcasecmp(_name, XHTML_NAMESPACE) )
            return xhtmlNamespace; //### Id == 0 can't be used with (void*)int based QDicts...
        if( _name->l == 0)
            return noNamespace;
        map = m_namespaceMap;
        lookup= 0;
        break;
    default:
        return 0;
    }

    NodeImpl::Id id, nsid = 0;
    QConstString n(_name->s, _name->l);
    bool cs = true; // case sensitive
    if (_type != NodeImpl::NamespaceId) {
        if (_nsURI)
            nsid = getId( NodeImpl::NamespaceId, 0, 0, _nsURI, false, false, 0 ) << 16;

        // Each document maintains a mapping of tag name -> id for every tag name encountered
        // in the document.
        cs = (htmlMode() == XHtml) || (_nsURI && _type != NodeImpl::AttributeId);

        if (!nsid) {
            // First see if it's a HTML element name
            // xhtml is lower case - case sensitive, easy to implement
            if ( cs && (id = lookup(n.string().ascii(), _name->l)) )
                return id;
            // compatibility: upper case - case insensitive
            if ( !cs && (id = lookup(n.string().lower().ascii(), _name->l )) )
                return id;
        }
    }

    // Look in the names array for the name
    // compatibility mode has to lookup upper case
    QString name = cs ? n.string() : n.string().upper();

    if (!_nsURI) {
        id = (NodeImpl::Id)(long) map->ids.find( name );
        if (!id && _type != NodeImpl::NamespaceId)
            id = (NodeImpl::Id)(long) map->ids.find( "aliases: " + name );
    } else {
        id = (NodeImpl::Id)(long) map->ids.find( name );
        if (!readonly && id && _prefix && _prefix->l) {
            // we were called in registration mode... check if the alias exists
            QConstString px( _prefix->s, _prefix->l );
            QString qn("aliases: " + (cs ? px.string() : px.string().upper()) + ":" + name);
            if (!map->ids.find( qn )) {
                map->ids.insert( qn, (void*)id );
            }
        }
    }

    if (id) return nsid + id;

    // unknown
    if (readonly) return 0;

    if ( pExceptioncode && _type != NodeImpl::NamespaceId && !Element::khtmlValidQualifiedName(_name)) {
        *pExceptioncode = DOMException::INVALID_CHARACTER_ERR;
        return 0;
    }

    // Name not found, so let's add it
    NodeImpl::Id cid = map->count++ + map->idStart;
    map->names.insert( cid, _name );
    _name->ref();

    map->ids.insert( name, (void*)cid );

    // and register an alias if needed for DOM1 methods compatibility
    if(_prefix && _prefix->l) {
        QConstString px( _prefix->s, _prefix->l );
        QString qn("aliases: " + (cs ? px.string() : px.string().upper()) + ":" + name);
        if (!map->ids.find( qn )) {
            map->ids.insert( qn, (void*)cid );
        }
    }

    if (map->ids.size() == map->ids.count() && map->ids.size() != khtml_MaxSeed)
        map->ids.resize( khtml::nextSeed(map->ids.count()) );
    if (map->names.size() == map->names.count() && map->names.size() != khtml_MaxSeed)
        map->names.resize( khtml::nextSeed(map->names.count()) );
    return nsid + cid;
 }

NodeImpl::Id DocumentImpl::getId( NodeImpl::IdType _type, DOMStringImpl *_nodeName, bool readonly, bool lookupHTML, int *pExceptioncode)
{
     return getId(_type, 0, 0, _nodeName, readonly, lookupHTML, pExceptioncode);
}

DOMString DocumentImpl::getName( NodeImpl::IdType _type, NodeImpl::Id _id ) const
{
    IdNameMapping *map;
    NameLookupFunction lookup;
    bool hasNS = (_id & NodeImpl_IdNSMask);
    switch (_type) {
    case NodeImpl::ElementId:
        map = m_elementMap;
        lookup = getTagName;
        break;
    case NodeImpl::AttributeId:
        map = m_attrMap;
        lookup = getAttrName;
        break;
    case NodeImpl::NamespaceId:
        if( _id == xhtmlNamespace )
            return XHTML_NAMESPACE;
        if( _id == noNamespace )
            return "";
        map = m_namespaceMap;
        lookup = 0;
        break;
    default:
        return DOMString();;
    }
    _id = _id & NodeImpl_IdLocalMask;
    if (_id >= map->idStart)
        return map->names[_id];
    else if (lookup) {
        // ### put them in a cache
        if (hasNS)
            return DOMString(lookup(_id)).lower();
        else
            return lookup(_id);
    } else
        return DOMString();
}

// This method is called whenever a top-level stylesheet has finished loading.
void DocumentImpl::styleSheetLoaded()
{
  // Make sure we knew this sheet was pending, and that our count isn't out of sync.
  assert(m_pendingStylesheets > 0);

  m_pendingStylesheets--;
  updateStyleSelector();
}

DOMString DocumentImpl::selectedStylesheetSet() const
{
    if (!view()) return DOMString();

    return view()->part()->d->m_sheetUsed;
}

void DocumentImpl::setSelectedStylesheetSet(const DOMString& s)
{
    // this code is evil
    if (view() && view()->part()->d->m_sheetUsed != s.string()) {
        view()->part()->d->m_sheetUsed = s.string();
        updateStyleSelector();
    }
}

void DocumentImpl::addStyleSheet(StyleSheetImpl *sheet, int *exceptioncode)
{
    int excode = 0;

    if (!m_addedStyleSheets) {
        m_addedStyleSheets = new StyleSheetListImpl;
        m_addedStyleSheets->ref();
    }

    m_addedStyleSheets->add(sheet);
    if (sheet->isCSSStyleSheet()) updateStyleSelector();

    if (exceptioncode) *exceptioncode = excode;
}

void DocumentImpl::removeStyleSheet(StyleSheetImpl *sheet, int *exceptioncode)
{
    int excode = 0;
    bool removed = false;
    bool is_css = sheet->isCSSStyleSheet();

    if (m_addedStyleSheets) {
        bool in_main_list = !sheet->hasOneRef();
        removed = m_addedStyleSheets->styleSheets.removeRef(sheet);
        sheet->deref();

        if (m_addedStyleSheets->styleSheets.count() == 0) {
            bool reset = m_addedStyleSheets->hasOneRef();
            m_addedStyleSheets->deref();
            if (reset) m_addedStyleSheets = 0;
        }

        // remove from main list, too
        if (in_main_list) m_styleSheets->remove(sheet);
    }

    if (removed) {
        if (is_css) updateStyleSelector();
    } else
        excode = DOMException::NOT_FOUND_ERR;

    if (exceptioncode) *exceptioncode = excode;
}

void DocumentImpl::updateStyleSelector()
{
//    kdDebug() << "PENDING " << m_pendingStylesheets << endl;

    // Don't bother updating, since we haven't loaded all our style info yet.
    if (m_pendingStylesheets > 0)
        return;

    recalcStyleSelector();
    recalcStyle(Force);
#if 0

    m_styleSelectorDirty = true;
#endif
    if ( renderer() )
        renderer()->setNeedsLayoutAndMinMaxRecalc();
}

void DocumentImpl::recalcStyleSelector()
{
    if ( !m_render || !attached() ) return;

    assert(m_pendingStylesheets==0);

    QPtrList<StyleSheetImpl> oldStyleSheets = m_styleSheets->styleSheets;
    m_styleSheets->styleSheets.clear();
    QString sheetUsed = view() ? view()->part()->d->m_sheetUsed.replace("&&", "&") : QString();
    bool autoselect = sheetUsed.isEmpty();
    if (autoselect && !m_preferredStylesheetSet.isEmpty())
        sheetUsed = m_preferredStylesheetSet.string();
    NodeImpl *n;
    for (int i=0 ; i<2 ; i++) {
        m_availableSheets.clear();
        m_availableSheets << i18n("Basic Page Style");
        bool canResetSheet = false;

        for (n = this; n; n = n->traverseNextNode()) {
            StyleSheetImpl *sheet = 0;

            if (n->nodeType() == Node::PROCESSING_INSTRUCTION_NODE)
            {
                // Processing instruction (XML documents only)
                ProcessingInstructionImpl* pi = static_cast<ProcessingInstructionImpl*>(n);
                sheet = pi->sheet();
                if (!sheet && !pi->localHref().isEmpty())
                {
                    // Processing instruction with reference to an element in this document - e.g.
                    // <?xml-stylesheet href="#mystyle">, with the element
                    // <foo id="mystyle">heading { color: red; }</foo> at some location in
                    // the document
                    ElementImpl* elem = getElementById(pi->localHref());
                    if (elem) {
                        DOMString sheetText("");
                        NodeImpl *c;
                        for (c = elem->firstChild(); c; c = c->nextSibling()) {
                            if (c->nodeType() == Node::TEXT_NODE || c->nodeType() == Node::CDATA_SECTION_NODE)
                                sheetText += c->nodeValue();
                        }

                        CSSStyleSheetImpl *cssSheet = new CSSStyleSheetImpl(this);
                        cssSheet->parseString(sheetText);
                        pi->setStyleSheet(cssSheet);
                        sheet = cssSheet;
                    }
                }

            }
            else if (n->isHTMLElement() && ( n->id() == ID_LINK || n->id() == ID_STYLE) ) {
                QString title;
                if ( n->id() == ID_LINK ) {
                    HTMLLinkElementImpl* l = static_cast<HTMLLinkElementImpl*>(n);
                    if (l->isCSSStyleSheet()) {
                        sheet = l->sheet();

                        if (sheet || l->isLoading() || l->isAlternate() )
                            title = l->getAttribute(ATTR_TITLE).string();

			if ((autoselect || title != sheetUsed) && l->isDisabled()) {
                            sheet = 0;
                        } else if (!title.isEmpty() && !l->isAlternate() && sheetUsed.isEmpty()) {
                            sheetUsed = title;
                            l->setDisabled(false);
                        }
                    }
                }
                else {
                    // <STYLE> element
                    HTMLStyleElementImpl* s = static_cast<HTMLStyleElementImpl*>(n);
                    if (!s->isLoading()) {
                        sheet = s->sheet();
                        if (sheet) title = s->getAttribute(ATTR_TITLE).string();
                    }
                    if (!title.isEmpty() && sheetUsed.isEmpty())
                        sheetUsed = title;
                }

                if ( !title.isEmpty() ) {
                    if ( title != sheetUsed )
                        sheet = 0; // don't use it

                    title = title.replace('&',  "&&");

                    if ( !m_availableSheets.contains( title ) )
                        m_availableSheets.append( title );
                }
            }
            else if (n->isHTMLElement() && n->id() == ID_BODY) {
                // <BODY> element (doesn't contain styles as such but vlink="..." and friends
                // are treated as style declarations)
                sheet = static_cast<HTMLBodyElementImpl*>(n)->sheet();
            }

            if (sheet) {
                sheet->ref();
                m_styleSheets->styleSheets.append(sheet);
            }

            // For HTML documents, stylesheets are not allowed within/after the <BODY> tag. So we
            // can stop searching here.
            if (isHTMLDocument() && n->id() == ID_BODY) {
                canResetSheet = !canResetSheet;
                break;
            }
        }

        // we're done if we don't select an alternative sheet
        // or we found the sheet we selected
        if (sheetUsed.isEmpty() ||
            (!canResetSheet && tokenizer()) ||
            m_availableSheets.contains(sheetUsed)) {
            break;
        }

        // the alternative sheet we used doesn't exist anymore
        // so try from scratch again
        if (view())
            view()->part()->d->m_sheetUsed = QString::null;
        if (!m_preferredStylesheetSet.isEmpty() && !(sheetUsed == m_preferredStylesheetSet))
            sheetUsed = m_preferredStylesheetSet.string();
        else
            sheetUsed = QString::null;
        autoselect = true;
    }

    // Include programmatically added style sheets
    if (m_addedStyleSheets) {
        QPtrListIterator<StyleSheetImpl> it = m_addedStyleSheets->styleSheets;
        for (; *it; ++it) {
            if ((*it)->isCSSStyleSheet() && !(*it)->disabled())
                m_styleSheets->add(*it);
        }
    }

    // De-reference all the stylesheets in the old list
    QPtrListIterator<StyleSheetImpl> it(oldStyleSheets);
    for (; it.current(); ++it)
	it.current()->deref();

    // Create a new style selector
    delete m_styleSelector;
    QString usersheet = m_usersheet;
    if ( m_view && m_view->mediaType() == "print" )
	usersheet += m_printSheet;
    m_styleSelector = new CSSStyleSelector( this, usersheet, m_styleSheets, m_url,
                                            !inCompatMode() );

    m_styleSelectorDirty = false;
}

void DocumentImpl::setHoverNode(NodeImpl *newHoverNode)
{
    NodeImpl* oldHoverNode = m_hoverNode;
    if (newHoverNode ) newHoverNode->ref();
    m_hoverNode = newHoverNode;
    if ( oldHoverNode ) oldHoverNode->deref();
}

void DocumentImpl::setFocusNode(NodeImpl *newFocusNode)
{
    // don't process focus changes while detaching
    if( !m_render ) return;
    // Make sure newFocusNode is actually in this document
    if (newFocusNode && (newFocusNode->getDocument() != this))
        return;

    if (m_focusNode != newFocusNode) {
        NodeImpl *oldFocusNode = m_focusNode;
        // Set focus on the new node
        m_focusNode = newFocusNode;
        // Remove focus from the existing focus node (if any)
        if (oldFocusNode) {
            if (oldFocusNode->active())
                oldFocusNode->setActive(false);

            oldFocusNode->setFocus(false);
	    oldFocusNode->dispatchHTMLEvent(EventImpl::BLUR_EVENT,false,false);
	    oldFocusNode->dispatchUIEvent(EventImpl::DOMFOCUSOUT_EVENT);
            if ((oldFocusNode == this) && oldFocusNode->hasOneRef()) {
                oldFocusNode->deref(); // deletes this
                return;
            }
	    else {
                oldFocusNode->deref();