dom2_rangeimpl.cpp

手机浏览器源码程序,功能强大

            else
                cmnRoot->removeChild(n,exceptioncode);
        }
    }

    if ((action == EXTRACT_CONTENTS || action == CLONE_CONTENTS) && rightContents)
      fragment->appendChild(rightContents,exceptioncode);

    // collapse to the proper position - see spec section 2.6
    if (action == EXTRACT_CONTENTS || action == DELETE_CONTENTS) {
	if (!partialStart && !partialEnd)
	    collapse(true,exceptioncode);
	else if (partialStart) {
	    setStartContainer(partialStart->parentNode());
	    setEndContainer(partialStart->parentNode());
	    m_startOffset = m_endOffset = partialStart->nodeIndex()+1;
	}
	else if (partialEnd) {
	    setStartContainer(partialEnd->parentNode());
	    setEndContainer(partialEnd->parentNode());
	    m_startOffset = m_endOffset = partialEnd->nodeIndex();
	}
    }
    return fragment;
}


DocumentFragmentImpl *RangeImpl::extractContents( int &exceptioncode )
{
    if (m_detached) {
        exceptioncode = DOMException::INVALID_STATE_ERR;
        return 0;
    }

    checkDeleteExtract(exceptioncode);
    if (exceptioncode)
	return 0;

    return processContents(EXTRACT_CONTENTS,exceptioncode);
}

DocumentFragmentImpl *RangeImpl::cloneContents( int &exceptioncode  )
{
    if (m_detached) {
        exceptioncode = DOMException::INVALID_STATE_ERR;
        return 0;
    }

    return processContents(CLONE_CONTENTS,exceptioncode);
}

void RangeImpl::insertNode( NodeImpl *newNode, int &exceptioncode )
{
    if (m_detached) {
        exceptioncode = DOMException::INVALID_STATE_ERR;
        return;
    }

    // NO_MODIFICATION_ALLOWED_ERR: Raised if an ancestor container of either boundary-point of
    // the Range is read-only.
    if (containedByReadOnly()) {
        exceptioncode = DOMException::NO_MODIFICATION_ALLOWED_ERR;
        return;
    }

    // WRONG_DOCUMENT_ERR: Raised if newParent and the container of the start of the Range were
    // not created from the same document.
    if (newNode->getDocument() != m_startContainer->getDocument()) {
        exceptioncode = DOMException::WRONG_DOCUMENT_ERR;
        return;
    }


    // HIERARCHY_REQUEST_ERR: Raised if the container of the start of the Range is of a type that
    // does not allow children of the type of newNode or if newNode is an ancestor of the container.

    // an extra one here - if a text node is going to split, it must have a parent to insert into
    if (m_startContainer->nodeType() == Node::TEXT_NODE && !m_startContainer->parentNode()) {
        exceptioncode = DOMException::HIERARCHY_REQUEST_ERR;
        return;
    }

    // In the case where the container is a text node, we check against the container's parent, because
    // text nodes get split up upon insertion.
    NodeImpl *checkAgainst;
    if (m_startContainer->nodeType() == Node::TEXT_NODE)
	checkAgainst = m_startContainer->parentNode();
    else
	checkAgainst = m_startContainer;

    if (newNode->nodeType() == Node::DOCUMENT_FRAGMENT_NODE) {
	// check each child node, not the DocumentFragment itself
    	NodeImpl *c;
    	for (c = newNode->firstChild(); c; c = c->nextSibling()) {
	    if (!checkAgainst->childTypeAllowed(c->nodeType())) {
		exceptioncode = DOMException::HIERARCHY_REQUEST_ERR;
		return;
	    }
    	}
    }
    else {
	if (!checkAgainst->childTypeAllowed(newNode->nodeType())) {
	    exceptioncode = DOMException::HIERARCHY_REQUEST_ERR;
	    return;
	}
    }

    for (NodeImpl *n = m_startContainer; n; n = n->parentNode()) {
        if (n == newNode) {
            exceptioncode = DOMException::HIERARCHY_REQUEST_ERR;
            return;
        }
    }

    // INVALID_NODE_TYPE_ERR: Raised if newNode is an Attr, Entity, Notation, or Document node.
    if( newNode->nodeType() == Node::ATTRIBUTE_NODE ||
        newNode->nodeType() == Node::ENTITY_NODE ||
        newNode->nodeType() == Node::NOTATION_NODE ||
        newNode->nodeType() == Node::DOCUMENT_NODE) {
        exceptioncode = RangeException::INVALID_NODE_TYPE_ERR + RangeException::_EXCEPTION_OFFSET;
        return;
    }

    if( m_startContainer->nodeType() == Node::TEXT_NODE ||
        m_startContainer->nodeType() == Node::CDATA_SECTION_NODE )
    {
        TextImpl *newText = static_cast<TextImpl*>(m_startContainer)->splitText(m_startOffset,exceptioncode);
        if (exceptioncode)
            return;
        m_startContainer->parentNode()->insertBefore( newNode, newText, exceptioncode );
    }
    else {
        m_startContainer->insertBefore( newNode, m_startContainer->childNode( m_startOffset ), exceptioncode );
    }
}

DOMString RangeImpl::toString( int &exceptioncode ) const
{
    if (m_detached) {
        exceptioncode = DOMException::INVALID_STATE_ERR;
        return DOMString();
    }

    DOMString text = "";
    NodeImpl *pastEnd = pastEndNode();
    for (NodeImpl *n = startNode(); n != pastEnd; n = n->traverseNextNode()) {
        if (n->nodeType() == DOM::Node::TEXT_NODE || n->nodeType() == DOM::Node::CDATA_SECTION_NODE) {
            DOMString str = static_cast<TextImpl *>(n)->data().copy();
            if (n == m_endContainer)
                str.truncate(m_endOffset);
            if (n == m_startContainer)
                str.remove(0, m_startOffset);
            text += str;
        }
    }
    return text;
}

DOMString RangeImpl::toHTML() const
{
    return createMarkup(this);
}

DOMString RangeImpl::text() const
{
    if (m_detached)
        return DOMString();

    // We need to update layout, since plainText uses line boxes in the render tree.
    // FIXME: As with innerText, we'd like this to work even if there are no render objects.
    m_startContainer->getDocument()->updateLayout();

    // FIXME: Maybe DOMRange constructor should take const DOMRangeImpl*; if it did we would not need this const_cast.
    return plainText(const_cast<RangeImpl *>(this));
}

DocumentFragmentImpl *RangeImpl::createContextualFragment ( DOMString &html, int &exceptioncode ) const
{
   if (m_detached) {
        exceptioncode = DOMException::INVALID_STATE_ERR;
        return NULL;
    }

    if (! m_startContainer->isHTMLElement()) {
	exceptioncode = DOMException::NOT_SUPPORTED_ERR;
	return NULL;
    }

    HTMLElementImpl *e = static_cast<HTMLElementImpl *>(m_startContainer);
    DocumentFragmentImpl *fragment = e->createContextualFragment(html);
    if (!fragment) {
	exceptioncode = DOMException::NOT_SUPPORTED_ERR;
	return NULL;
    }

    return fragment;
}


void RangeImpl::detach( int &exceptioncode )
{
    if (m_detached) {
        exceptioncode = DOMException::INVALID_STATE_ERR;
        return;
    }

    if (m_startContainer)
        m_startContainer->deref();
    m_startContainer = 0;
    if (m_endContainer)
        m_endContainer->deref();
    m_endContainer = 0;
    m_detached = true;
}

bool RangeImpl::isDetached() const
{
    return m_detached;
}

void RangeImpl::checkNodeWOffset( NodeImpl *n, int offset, int &exceptioncode) const
{
    if( offset < 0 ) {
        exceptioncode = DOMException::INDEX_SIZE_ERR;
    }

    switch (n->nodeType()) {
	case Node::ENTITY_NODE:
	case Node::NOTATION_NODE:
	case Node::DOCUMENT_TYPE_NODE:
            exceptioncode = RangeException::INVALID_NODE_TYPE_ERR + RangeException::_EXCEPTION_OFFSET;
	    break;
        case Node::TEXT_NODE:
        case Node::COMMENT_NODE:
        case Node::CDATA_SECTION_NODE:
            if ( (unsigned long)offset > static_cast<CharacterDataImpl*>(n)->length() )
                exceptioncode = DOMException::INDEX_SIZE_ERR;
            break;
        case Node::PROCESSING_INSTRUCTION_NODE:
            // ### are we supposed to check with just data or the whole contents?
            if ( (unsigned long)offset > static_cast<ProcessingInstructionImpl*>(n)->data().length() )
                exceptioncode = DOMException::INDEX_SIZE_ERR;
            break;
        default:
            if ( (unsigned long)offset > n->childNodeCount() )
                exceptioncode = DOMException::INDEX_SIZE_ERR;
            break;
    }
}

void RangeImpl::checkNodeBA( NodeImpl *n, int &exceptioncode ) const
{
    // INVALID_NODE_TYPE_ERR: Raised if the root container of refNode is not an
    // Attr, Document or DocumentFragment node or if refNode is a Document,
    // DocumentFragment, Attr, Entity, or Notation node.
    NodeImpl *root = n;
    while (root->parentNode())
	root = root->parentNode();
    if (!(root->nodeType() == Node::ATTRIBUTE_NODE ||
          root->nodeType() == Node::DOCUMENT_NODE ||
          root->nodeType() == Node::DOCUMENT_FRAGMENT_NODE)) {
        exceptioncode = RangeException::INVALID_NODE_TYPE_ERR + RangeException::_EXCEPTION_OFFSET;
        return;
    }

    if( n->nodeType() == Node::DOCUMENT_NODE ||
        n->nodeType() == Node::DOCUMENT_FRAGMENT_NODE ||
        n->nodeType() == Node::ATTRIBUTE_NODE ||
        n->nodeType() == Node::ENTITY_NODE ||
        n->nodeType() == Node::NOTATION_NODE )
        exceptioncode = RangeException::INVALID_NODE_TYPE_ERR  + RangeException::_EXCEPTION_OFFSET;

}

RangeImpl *RangeImpl::cloneRange(int &exceptioncode) const
{
    if (m_detached) {
        exceptioncode = DOMException::INVALID_STATE_ERR;
        return 0;
    }

    return new RangeImpl(m_ownerDocument,m_startContainer,m_startOffset,m_endContainer,m_endOffset);
}

void RangeImpl::setStartAfter( NodeImpl *refNode, int &exceptioncode )
{
    if (m_detached) {
        exceptioncode = DOMException::INVALID_STATE_ERR;
        return;
    }

    if (!refNode) {
        exceptioncode = DOMException::NOT_FOUND_ERR;
        return;
    }

    if (refNode->getDocument() != m_ownerDocument->document()) {
        exceptioncode = DOMException::WRONG_DOCUMENT_ERR;
        return;
    }

    checkNodeBA( refNode, exceptioncode );
    if (exceptioncode)
        return;

    setStart( refNode->parentNode(), refNode->nodeIndex()+1, exceptioncode );
}

void RangeImpl::setEndBefore( NodeImpl *refNode, int &exceptioncode )
{
    if (m_detached) {
        exceptioncode = DOMException::INVALID_STATE_ERR;
        return;
    }

    if (!refNode) {
        exceptioncode = DOMException::NOT_FOUND_ERR;
        return;
    }

    if (refNode->getDocument() != m_ownerDocument->document()) {
        exceptioncode = DOMException::WRONG_DOCUMENT_ERR;
        return;
    }

    checkNodeBA( refNode, exceptioncode );
    if (exceptioncode)
        return;

    setEnd( refNode->parentNode(), refNode->nodeIndex(), exceptioncode );
}

void RangeImpl::setEndAfter( NodeImpl *refNode, int &exceptioncode )
{
    if (m_detached) {
        exceptioncode = DOMException::INVALID_STATE_ERR;
        return;
    }

    if (!refNode) {
        exceptioncode = DOMException::NOT_FOUND_ERR;