dom_elementimpl.cpp

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

    // FIXME: the approach is flawed, better use an enum instead of bool
    int value;
    if (enabled)
        value = CSS_VAL_ENABLED;
    else {
        // Intelligently use "none" or "disabled", depending on the type of
        // element
	// FIXME: intelligence not impl'd yet
	value = CSS_VAL_NONE;

        // FIXME: reset caret if it is in this node or a child
    }/*end if*/
    // FIXME: use addCSSProperty when I get permission to move it here
//    kdDebug(6000) << "CSS_PROP__KHTML_USER_INPUT: "<< value << endl;
    styleRules()->setProperty(CSS_PROP__KHTML_USER_INPUT, value, false, true);
    setChanged();

}

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

XMLElementImpl::XMLElementImpl(DocumentPtr *doc, NodeImpl::Id id)
    : ElementImpl(doc)
{
    // Called from createElement(). In this case localName, prefix, and namespaceURI all need to be null.
    m_id = id;
}

XMLElementImpl::XMLElementImpl(DocumentPtr *doc, NodeImpl::Id id, DOMStringImpl *_prefix)
    : ElementImpl(doc)
{
    // Called from createElementNS()
    m_id = id;

    m_prefix = _prefix;
    if (m_prefix)
	m_prefix->ref();
}

XMLElementImpl::~XMLElementImpl()
{
}

DOMString XMLElementImpl::localName() const
{
    if ( m_htmlCompat )
       return DOMString(); // was created with non-namespace-aware createElement()
    return getDocument()->getName(ElementId, m_id);
}

DOMString XMLElementImpl::tagName() const
{
    DOMString tn = getDocument()->getName(ElementId, id());
    if (m_htmlCompat)
        tn = tn.upper();

    if (m_prefix)
        return DOMString(m_prefix) + ":" + tn;

    return tn;
}

NodeImpl *XMLElementImpl::cloneNode ( bool deep )
{
    XMLElementImpl *clone = new XMLElementImpl(docPtr(), id(), m_prefix);
    finishCloneNode( clone, deep );
    return clone;
}

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

NamedAttrMapImpl::NamedAttrMapImpl(ElementImpl *element)
  : m_element(element),
    m_attrs(0),
    m_attrCount(0)
{
}

NamedAttrMapImpl::~NamedAttrMapImpl()
{
    for (unsigned long i = 0; i < m_attrCount; i++)
	m_attrs[i].free();
    free(m_attrs);
}

NodeImpl *NamedAttrMapImpl::getNamedItem ( NodeImpl::Id id, bool nsAware, DOMStringImpl* qName ) const
{
    if (!m_element)
	return 0;
    unsigned int mask = nsAware ? ~0L : NodeImpl_IdLocalMask;
    id = (id & mask);

    for (unsigned long i = 0; i < m_attrCount; i++) {
	if ((m_attrs[i].id() & mask) == id) {
            // if we are called with a qualified name, filter out NS-aware elements with non-matching name.
            if (qName && (m_attrs[i].id() & NodeImpl_IdNSMask) &&
                strcasecmp(m_attrs[i].name(), DOMString(qName)))
                continue;
	    return m_attrs[i].createAttr(m_element,m_element->docPtr());
        }
    }

    return 0;
}

Node NamedAttrMapImpl::removeNamedItem ( NodeImpl::Id id, bool nsAware, DOMStringImpl* qName, int &exceptioncode )
{
    if (!m_element) {
        exceptioncode = DOMException::NOT_FOUND_ERR;
        return 0;
    }

    // NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly
    if (isReadOnly()) {
        exceptioncode = DOMException::NO_MODIFICATION_ALLOWED_ERR;
        return 0;
    }
    unsigned int mask = nsAware ? ~0L : NodeImpl_IdLocalMask;
    id = (id & mask);

    for (unsigned long i = 0; i < m_attrCount; i++) {
	if ((m_attrs[i].id() & mask) == id) {
            // if we are called with a qualified name, filter out NS-aware elements with non-matching name.
            if (qName && (m_attrs[i].id() & NodeImpl_IdNSMask) &&
                strcasecmp(m_attrs[i].name(), DOMString(qName)))
                continue;
	    id = m_attrs[i].id();
	    if (id == ATTR_ID)
	       m_element->updateId(m_attrs[i].val(), 0);
	    Node removed(m_attrs[i].createAttr(m_element,m_element->docPtr()));
	    m_attrs[i].free();
	    memmove(m_attrs+i,m_attrs+i+1,(m_attrCount-i-1)*sizeof(AttributeImpl));
	    m_attrCount--;
	    m_attrs = (AttributeImpl*)realloc(m_attrs,m_attrCount*sizeof(AttributeImpl));
	    m_element->parseAttribute(id,0);
	    return removed;
	}
    }

    // NOT_FOUND_ERR: Raised if there is no node with the specified namespaceURI
    // and localName in this map.
    exceptioncode = DOMException::NOT_FOUND_ERR;
    return 0;
}

Node NamedAttrMapImpl::setNamedItem ( NodeImpl* arg, bool nsAware, DOMStringImpl* qName, int &exceptioncode )
{
    if (!m_element) {
        exceptioncode = DOMException::NOT_FOUND_ERR;
        return 0;
    }

    // NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
    if (isReadOnly()) {
        exceptioncode = DOMException::NO_MODIFICATION_ALLOWED_ERR;
        return 0;
    }

    // WRONG_DOCUMENT_ERR: Raised if arg was created from a different document than the one that created this map.
    if (arg->getDocument() != m_element->getDocument()) {
        exceptioncode = DOMException::WRONG_DOCUMENT_ERR;
        return 0;
    }

    // HIERARCHY_REQUEST_ERR: Raised if an attempt is made to add a node doesn't belong in this NamedNodeMap
    if (!arg->isAttributeNode()) {
        exceptioncode = DOMException::HIERARCHY_REQUEST_ERR;
        return 0;
    }
    AttrImpl *attr = static_cast<AttrImpl*>(arg);

    // INUSE_ATTRIBUTE_ERR: Raised if arg is an Attr that is already an attribute of another Element object.
    // The DOM user must explicitly clone Attr nodes to re-use them in other elements.
    if (attr->ownerElement() && attr->ownerElement() != m_element) {
        exceptioncode = DOMException::INUSE_ATTRIBUTE_ERR;
        return 0;
    }

    if (attr->ownerElement() == m_element) {
	// Already have this attribute.
	// DOMTS core-1 test "hc_elementreplaceattributewithself" says we should return it.
	return attr;
    }
    unsigned int mask = nsAware ? ~0L : NodeImpl_IdLocalMask;
    NodeImpl::Id id = (attr->id() & mask);

    for (unsigned long i = 0; i < m_attrCount; i++) {
	if ((m_attrs[i].id() & mask) == id) {
            // if we are called with a qualified name, filter out NS-aware elements with non-matching name.
            if (qName && (m_attrs[i].id() & NodeImpl_IdNSMask) &&
                strcasecmp(m_attrs[i].name(), DOMString(qName)))
                continue;
	    // Attribute exists; replace it
	    if (id == ATTR_ID)
	       m_element->updateId(m_attrs[i].val(), attr->val());
	    
	    Node replaced = m_attrs[i].createAttr(m_element,m_element->docPtr());
	    m_attrs[i].free();
	    m_attrs[i].m_attrId = 0; /* "has implementation" flag */
	    m_attrs[i].m_data.attr = attr;
	    m_attrs[i].m_data.attr->ref();
	    attr->setElement(m_element);
	    m_element->parseAttribute(&m_attrs[i]);
	    // ### dispatch mutation events
	    return replaced;
	}
    }

    // No existing attribute; add to list
    m_attrCount++;
    m_attrs = (AttributeImpl*)realloc(m_attrs,m_attrCount*sizeof(AttributeImpl));
    m_attrs[m_attrCount-1].m_attrId = 0; /* "has implementation" flag */
    m_attrs[m_attrCount-1].m_data.attr = attr;
    m_attrs[m_attrCount-1].m_data.attr->ref();
    attr->setElement(m_element);
    if (id == ATTR_ID)
        m_element->updateId(0, attr->val());
    m_element->parseAttribute(&m_attrs[m_attrCount-1]);
    // ### dispatch mutation events

    return 0;
}

NodeImpl *NamedAttrMapImpl::item ( unsigned long index ) const
{
    if (!m_element)
	return 0;

    if (index >= m_attrCount)
	return 0;
    else
	return m_attrs[index].createAttr(m_element,m_element->docPtr());
}

unsigned long NamedAttrMapImpl::length(  ) const
{
    if (!m_element)
	return 0;

    return m_attrCount;
}

NodeImpl::Id NamedAttrMapImpl::idAt(unsigned long index) const
{
    assert(index <= m_attrCount);
    return m_attrs[index].id();
}

DOMStringImpl *NamedAttrMapImpl::valueAt(unsigned long index) const
{
    assert(index <= m_attrCount);
    return m_attrs[index].val();
}

DOMStringImpl *NamedAttrMapImpl::getValue(NodeImpl::Id id, bool nsAware, DOMStringImpl* qName) const
{
    unsigned int mask = nsAware ? ~0L : NodeImpl_IdLocalMask;
    id = (id & mask);
    for (unsigned long i = 0; i < m_attrCount; i++)
        if ((m_attrs[i].id() & mask) == id) {
            // if we are called with a qualified name, filter out NS-aware elements with non-matching name.
            if (qName && (m_attrs[i].id() & NodeImpl_IdNSMask) &&
                strcasecmp(m_attrs[i].name(), DOMString(qName)))
                continue;
            return m_attrs[i].val();
        }
    return 0;
}

void NamedAttrMapImpl::setValue(NodeImpl::Id id, DOMStringImpl *value, DOMStringImpl* qName,
                                DOMStringImpl *prefix, bool nsAware, bool hasNS)
{
    assert( !(qName && nsAware) );
    if (!id) return;
    // Passing in a null value here causes the attribute to be removed. This is a khtml extension
    // (the spec does not specify what to do in this situation).
    int exceptioncode = 0;
    if (!value) {
	removeNamedItem(id, nsAware, qName, exceptioncode);
	return;
    }
    unsigned int mask = nsAware ? ~0L : NodeImpl_IdLocalMask;
    NodeImpl::Id mid = (id & mask);

    // Check for an existing attribute.
    for (unsigned long i = 0; i < m_attrCount; i++) {
	if ((m_attrs[i].id() & mask) == mid) {
            // if we are called with a qualified name, filter out NS-aware elements with non-matching name.
            if (qName && (m_attrs[i].id() & NodeImpl_IdNSMask) &&
                strcasecmp(m_attrs[i].name(), DOMString(qName)))
                continue;
	    if (prefix)
		m_attrs[i].attr()->setPrefix(prefix,exceptioncode);
	    m_attrs[i].setValue(value,m_element);
	    // ### dispatch mutation events
	    return;
	}
    }

    // No existing matching attribute; add a new one
    m_attrCount++;
    m_attrs = (AttributeImpl*)realloc(m_attrs,m_attrCount*sizeof(AttributeImpl));
    if (!nsAware) {
	// Called from setAttribute()... we only have a name
        m_attrs[m_attrCount-1].m_attrId = id;
        m_attrs[m_attrCount-1].m_data.value = value;
	m_attrs[m_attrCount-1].m_data.value->ref();
    }
    else {
	// Called from setAttributeNS()... need to create a full AttrImpl here
        if(!m_element)
            return;
	m_attrs[m_attrCount-1].m_data.attr = new AttrImpl(m_element,m_element->docPtr(),
							  id,
							  value,
                                                          prefix);
	m_attrs[m_attrCount-1].m_attrId = 0; /* "has implementation" flag */
	m_attrs[m_attrCount-1].m_data.attr->ref();
        m_attrs[m_attrCount-1].m_data.attr->setHTMLCompat( !hasNS &&
                                                 m_element->getDocument()->htmlMode() != DocumentImpl::XHtml );
    }
    if (m_element) {
	if (id == ATTR_ID)
	    m_element->updateId(0, value);
	m_element->parseAttribute(&m_attrs[m_attrCount-1]);
    }
    // ### dispatch mutation events
}

Attr NamedAttrMapImpl::removeAttr(AttrImpl *attr)
{
    for (unsigned long i = 0; i < m_attrCount; i++) {
	if (m_attrs[i].attr() == attr) {
	    NodeImpl::Id id = m_attrs[i].id();
	    if (id == ATTR_ID)
	        m_element->updateId(attr->val(), 0);
	    Node removed(m_attrs[i].createAttr(m_element,m_element->docPtr()));
	    m_attrs[i].free();
	    memmove(m_attrs+i,m_attrs+i+1,(m_attrCount-i-1)*sizeof(AttributeImpl));
	    m_attrCount--;
	    m_attrs = (AttributeImpl*)realloc(m_attrs,m_attrCount*sizeof(AttributeImpl));
	    m_element->parseAttribute(id,0);
	    // ### dispatch mutation events
	    return removed;
	}
    }

    return 0;
}

NodeImpl::Id NamedAttrMapImpl::mapId(DOMStringImpl* namespaceURI,
				     DOMStringImpl* localName, bool readonly)
{
    if (!m_element)
	return 0;

    return m_element->getDocument()->getId(NodeImpl::AttributeId, namespaceURI, 0, localName, readonly,
                                           true /*lookupHTML*/);
}

void NamedAttrMapImpl::copyAttributes(NamedAttrMapImpl *other)
{
    assert(m_element);
    unsigned long i;
    for (i = 0; i < m_attrCount; i++) {
        if (m_attrs[i].id() == ATTR_ID)
            m_element->updateId(m_attrs[i].val(), 0);
	m_attrs[i].free();
    }
    m_attrCount = other->m_attrCount;
    m_attrs = (AttributeImpl*)realloc(m_attrs,m_attrCount*sizeof(AttributeImpl));
    for (i = 0; i < m_attrCount; i++) {
	m_attrs[i].m_attrId = other->m_attrs[i].m_attrId;
	if (m_attrs[i].m_attrId) {
	    m_attrs[i].m_data.value = other->m_attrs[i].m_data.value;
	    m_attrs[i].m_data.value->ref();
	}
	else {
	    m_attrs[i].m_data.attr = static_cast<AttrImpl*>(other->m_attrs[i].m_data.attr->cloneNode(true));
	    m_attrs[i].m_data.attr->ref();
	    m_attrs[i].m_data.attr->setElement(m_element);
	}
	if (m_attrs[i].id() == ATTR_ID)
	   m_element->updateId(0, m_attrs[i].val());
	m_element->parseAttribute(&m_attrs[i]);
    }
}

void NamedAttrMapImpl::setElement(ElementImpl *element)
{
    assert(!m_element);
    m_element = element;

    for (unsigned long i = 0; i < m_attrCount; i++)
	if (m_attrs[i].attr())
	    m_attrs[i].attr()->setElement(element);
}

void NamedAttrMapImpl::detachFromElement()
{
    // This makes the map invalid; nothing can really be done with it now since it's not
    // associated with an element. But we have to keep it around in memory in case there
    // are still references to it.
    m_element = 0;
    for (unsigned long i = 0; i < m_attrCount; i++)
	m_attrs[i].free();
    free(m_attrs);
    m_attrs = 0;
    m_attrCount = 0;
}