html_miscimpl.cpp

手机浏览器源码程序,功能强大

        QString idAttr = e->getAttribute(ATTR_ID).string();
        QString nameAttr = e->getAttribute(ATTR_NAME).string();
        if (!idAttr.isEmpty()) {
            // add to id cache
            QPtrVector<NodeImpl> *idVector = info->idCache.find(idAttr);
            if (!idVector) {
                idVector = new QPtrVector<NodeImpl>;
                info->idCache.insert(idAttr, idVector);
            }
            appendToVector(idVector, n);
        }
        if (!nameAttr.isEmpty() && idAttr != nameAttr
            && (type != DOC_ALL || 
                (e->id() == ID_IMG || e->id() == ID_FORM ||
                 e->id() == ID_APPLET || e->id() == ID_OBJECT ||
                 e->id() == ID_EMBED))) {
            // add to name cache
            QPtrVector<NodeImpl> *nameVector = info->nameCache.find(nameAttr);
            if (!nameVector) {
                nameVector = new QPtrVector<NodeImpl>;
                info->nameCache.insert(nameAttr, nameVector);
            }
            appendToVector(nameVector, n);
        }
    }

    info->hasNameCache = true;
}

QValueList<Node> HTMLCollectionImpl::namedItems(const DOMString &name) const
{
    QValueList<Node> result;

    if (name.isEmpty())
        return result;
	
#if NOKIA_CHANGES
	// optimisation: first find if there are some nodes already in the cache 
	// - this might cause some abnormal behaviors, but could achieve better
	// performance because updateNameCache() is extremely slow for big collections.
	// (e.g., the hugh form of www.finnair.fi).
	if( info )
	{
		QPtrVector<NodeImpl>* ids = info->idCache.find(name.string());
		QPtrVector<NodeImpl>* names = info->nameCache.find(name.string());
		
		for (unsigned i = 0; ids && i < ids->count(); ++i) {
			result.append(ids->at(i));
		}

		for (unsigned i = 0; names && i < names->count(); ++i) {
			result.append(names->at(i));
		}

		if( !result.isEmpty() ) return result;
	}
#endif

    resetCollectionInfo();
    updateNameCache();
    
    QPtrVector<NodeImpl> *idResults = info->idCache.find(name.string());
    QPtrVector<NodeImpl> *nameResults = info->nameCache.find(name.string());
    
    for (unsigned i = 0; idResults && i < idResults->count(); ++i) {
        result.append(idResults->at(i));
    }

    for (unsigned i = 0; nameResults && i < nameResults->count(); ++i) {
        result.append(nameResults->at(i));
    }

    return result;
}


NodeImpl *HTMLCollectionImpl::nextNamedItem( const DOMString &name ) const
{
    resetCollectionInfo();

    for (NodeImpl *n = traverseNextItem(info->current ? info->current : base); n; n = traverseNextItem(n)) {
        if (checkForNameMatch(n, idsDone, name, true)) {
            info->current = n;
            return n;
        }
    }
    
    if (idsDone) {
        info->current = 0; 
        return 0;
    }
    idsDone = true;

    for (NodeImpl *n = traverseNextItem(info->current ? info->current : base); n; n = traverseNextItem(n)) {
        if (checkForNameMatch(n, idsDone, name, true)) {
            info->current = n;
            return n;
        }
    }

    return 0;
}

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

HTMLFormCollectionImpl::HTMLFormCollectionImpl(NodeImpl* _base)
    : HTMLCollectionImpl(_base, 0)
{
    HTMLFormElementImpl *formBase = static_cast<HTMLFormElementImpl*>(base);
    if (!formBase->collectionInfo) {
        formBase->collectionInfo = new CollectionInfo();
    }
    info = formBase->collectionInfo;
}

HTMLFormCollectionImpl::~HTMLFormCollectionImpl()
{
}

unsigned long HTMLFormCollectionImpl::calcLength() const
{
    QPtrVector<HTMLGenericFormElementImpl> &l = static_cast<HTMLFormElementImpl*>( base )->formElements;

    int len = 0;
    for ( unsigned i = 0; i < l.count(); i++ )
        if ( l.at( i )->isEnumeratable() )
            ++len;

    return len;
}

NodeImpl *HTMLFormCollectionImpl::item(unsigned long index) const
{
    resetCollectionInfo();

    if (info->current && info->position == index) {
        return info->current;
    }
    if (info->haslength && info->length <= index) {
        return 0;
    }
    if (!info->current || info->position > index) {
        info->current = 0;
        info->position = 0;
        info->elementsArrayPosition = 0;
    }

    QPtrVector<HTMLGenericFormElementImpl> &l = static_cast<HTMLFormElementImpl*>( base )->formElements;
    unsigned currentIndex = info->position;
    
    for (unsigned i = info->elementsArrayPosition; i < l.count(); i++) {
        if (l[i]->isEnumeratable() ) {
            if (index == currentIndex) {
                info->position = index;
                info->current = l[i];
                info->elementsArrayPosition = i;
                return l[i];
            }

            currentIndex++;
        }
    }

    return 0;
}

NodeImpl* HTMLFormCollectionImpl::getNamedItem(NodeImpl*, int attr_id, const DOMString& name, bool caseSensitive) const
{
    info->position = 0;
    return getNamedFormItem( attr_id, name, 0, caseSensitive );
}

NodeImpl* HTMLFormCollectionImpl::getNamedFormItem(int attr_id, const DOMString& name, int duplicateNumber, bool caseSensitive) const
{
    if(base->nodeType() == Node::ELEMENT_NODE)
    {
        HTMLElementImpl* baseElement = static_cast<HTMLElementImpl*>(base);
        bool foundInputElements = false;
        if(baseElement->id() == ID_FORM)
        {
            HTMLFormElementImpl* f = static_cast<HTMLFormElementImpl*>(baseElement);
            for (unsigned i = 0; i < f->formElements.count(); ++i) {
                HTMLGenericFormElementImpl* e = f->formElements[i];
                if (e->isEnumeratable()) {
                    bool found;
                    if (caseSensitive)
                        found = e->getAttribute(attr_id) == name;
                    else
                        found = e->getAttribute(attr_id).domString().lower() == name.lower();
                    if (found) {
                        foundInputElements = true;
                        if (!duplicateNumber)
                            return e;
                        --duplicateNumber;
                    }
                }
            }
        }

        if ( !foundInputElements )
        {
            HTMLFormElementImpl* f = static_cast<HTMLFormElementImpl*>(baseElement);

            for(unsigned i = 0; i < f->imgElements.count(); ++i)
            {
                HTMLImageElementImpl* e = f->imgElements[i];
                bool found;
                if (caseSensitive)
                    found = e->getAttribute(attr_id) == name;
                else
                    found = e->getAttribute(attr_id).domString().lower() == name.lower();
                if (found) {
                    if (!duplicateNumber)
                        return e;
                    --duplicateNumber;
                }
            }
        }
    }
    return 0;
}

NodeImpl * HTMLFormCollectionImpl::firstItem() const
{
    return item(0);
}

NodeImpl * HTMLFormCollectionImpl::nextItem() const
{
    return item(info->position + 1);
}

NodeImpl * HTMLFormCollectionImpl::nextNamedItemInternal( const DOMString &name ) const
{
    NodeImpl *retval = getNamedFormItem( idsDone ? ATTR_NAME : ATTR_ID, name, ++info->position, true );
    if ( retval )
        return retval;
    if ( idsDone ) // we're done
        return 0;
    // After doing all ATTR_ID, do ATTR_NAME
    idsDone = true;
    return getNamedItem(base->firstChild(), ATTR_NAME, name, true);
}

NodeImpl *HTMLFormCollectionImpl::namedItem( const DOMString &name, bool caseSensitive ) const
{
    // http://msdn.microsoft.com/workshop/author/dhtml/reference/methods/nameditem.asp
    // This method first searches for an object with a matching id
    // attribute. If a match is not found, the method then searches for an
    // object with a matching name attribute, but only on those elements
    // that are allowed a name attribute.
    resetCollectionInfo();
    idsDone = false;
    info->current = getNamedItem(base->firstChild(), ATTR_ID, name, true);
    if(info->current)
        return info->current;
    idsDone = true;
    info->current = getNamedItem(base->firstChild(), ATTR_NAME, name, true);
    return info->current;
}


NodeImpl *HTMLFormCollectionImpl::nextNamedItem( const DOMString &name ) const
{
    // nextNamedItemInternal can return an item that has both id=<name> and name=<name>
    // Here, we have to filter out such cases.
    NodeImpl *impl = nextNamedItemInternal( name );
    if (!idsDone) // looking for id=<name> -> no filtering
        return impl;
    // looking for name=<name> -> filter out if id=<name>
    bool ok = false;
    while (impl && !ok)
    {
        if(impl->nodeType() == Node::ELEMENT_NODE)
        {
            HTMLElementImpl *e = static_cast<HTMLElementImpl *>(impl);
            ok = (e->getAttribute(ATTR_ID) != name);
            if (!ok)
                impl = nextNamedItemInternal( name );
        } else // can't happen
            ok = true;
    }
    return impl;
}

void HTMLFormCollectionImpl::updateNameCache() const
{
    if (info->hasNameCache)
        return;

    QDict<char> foundInputElements;

    if (base->nodeType() != Node::ELEMENT_NODE ||static_cast<HTMLElementImpl*>(base)->id() != ID_FORM) {
        info->hasNameCache = true;
        return;
    }

    HTMLElementImpl* baseElement = static_cast<HTMLElementImpl*>(base);

    HTMLFormElementImpl* f = static_cast<HTMLFormElementImpl*>(baseElement);
    for (unsigned i = 0; i < f->formElements.count(); ++i) {
        HTMLGenericFormElementImpl* e = f->formElements[i];
        if (e->isEnumeratable()) {
            QString idAttr = e->getAttribute(ATTR_ID).string();
            QString nameAttr = e->getAttribute(ATTR_NAME).string();
            if (!idAttr.isEmpty()) {
                // add to id cache
                QPtrVector<NodeImpl> *idVector = info->idCache.find(idAttr);
                if (!idVector) {
                    idVector = new QPtrVector<NodeImpl>;
                    info->idCache.insert(idAttr, idVector);
                }
                appendToVector(idVector, static_cast<NodeImpl *>(e));
                foundInputElements.insert(idAttr, (char *)true);
            }
            if (!nameAttr.isEmpty() && idAttr != nameAttr) {
                // add to name cache
                QPtrVector<NodeImpl> *nameVector = info->nameCache.find(nameAttr);
                if (!nameVector) {
                    nameVector = new QPtrVector<NodeImpl>;
                    info->nameCache.insert(nameAttr, nameVector);
                }
                appendToVector(nameVector, static_cast<NodeImpl *>(e));
                foundInputElements.insert(nameAttr, (char *)true);
            }
        }
    }

    for (unsigned i = 0; i < f->imgElements.count(); ++i) {
        HTMLImageElementImpl* e = f->imgElements[i];
        QString idAttr = e->getAttribute(ATTR_ID).string();
        QString nameAttr = e->getAttribute(ATTR_NAME).string();
        if (!idAttr.isEmpty() && !foundInputElements.find(idAttr)) {
            // add to id cache
            QPtrVector<NodeImpl> *idVector = info->idCache.find(idAttr);
            if (!idVector) {
                idVector = new QPtrVector<NodeImpl>;
                info->idCache.insert(idAttr, idVector);
            }
            appendToVector(idVector, static_cast<NodeImpl *>(e));
        }
        if (!nameAttr.isEmpty() && idAttr != nameAttr && !foundInputElements.find(nameAttr)) {
            // add to name cache
            QPtrVector<NodeImpl> *nameVector = info->nameCache.find(nameAttr);
            if (!nameVector) {
                nameVector = new QPtrVector<NodeImpl>;
                info->nameCache.insert(nameAttr, nameVector);
            }
            appendToVector(nameVector, static_cast<NodeImpl *>(e));
        }
    }

    info->hasNameCache = true;
}