xml_tokenizer.cpp

khtml在gtk上的移植版本

    errorProt += i18n( "error: %1 in line %2, column %3\n" )
#endif
        .arg( exception.message() )
        .arg( exception.lineNumber() )
        .arg( exception.columnNumber() );
    
    errorLine = exception.lineNumber();
    errorCol = exception.columnNumber();
    
    return true;
}

bool XMLHandler::fatalError( const QXmlParseException& exception )
{
#if APPLE_CHANGES
    errorProt += QString("error on line %2 at column %3: %1")
#else
    errorProt += i18n( "fatal error: %1 in line %2, column %3\n" )
#endif
        .arg( exception.message() )
        .arg( exception.lineNumber() )
        .arg( exception.columnNumber() );

    errorLine = exception.lineNumber();
    errorCol = exception.columnNumber();

    return false;
}

bool XMLHandler::enterText()
{
    NodeImpl *newNode = m_doc->document()->createTextNode("");
    if (m_currentNode->addChild(newNode)) {
        m_currentNode = newNode;
        return true;
    }
    else {
        delete newNode;
        return false;
    }
}

void XMLHandler::exitText()
{
    if (m_view && m_currentNode && !m_currentNode->attached())
        m_currentNode->attach();
    
    NodeImpl* par = m_currentNode->parentNode();
    if (par != 0)
        m_currentNode = par;
}

bool XMLHandler::attributeDecl(const QString &/*eName*/, const QString &/*aName*/, const QString &/*type*/,
                               const QString &/*valueDefault*/, const QString &/*value*/)
{
    // qt's xml parser (as of 2.2.3) does not currently give us values for type, valueDefault and
    // value. When it does, we can store these somewhere and have default attributes on elements
    return true;
}

bool XMLHandler::externalEntityDecl(const QString &/*name*/, const QString &/*publicId*/, const QString &/*systemId*/)
{
    // ### insert these too - is there anything special we have to do here?
    return true;
}

bool XMLHandler::internalEntityDecl(const QString &name, const QString &value)
{
    EntityImpl *e = new EntityImpl(m_doc,name);
    // ### further parse entities inside the value and add them as separate nodes (or entityreferences)?
    e->addChild(m_doc->document()->createTextNode(value));
// ### FIXME
//     if (m_doc->document()->doctype())
//         static_cast<GenericRONamedNodeMapImpl*>(m_doc->document()->doctype()->entities())->addNode(e);
    return true;
}

bool XMLHandler::notationDecl(const QString &name, const QString &publicId, const QString &systemId)
{
// ### FIXME
//     if (m_doc->document()->doctype()) {
//         NotationImpl *n = new NotationImpl(m_doc,name,publicId,systemId);
//         static_cast<GenericRONamedNodeMapImpl*>(m_doc->document()->doctype()->notations())->addNode(n);
//     }
    return true;
}

bool XMLHandler::unparsedEntityDecl(const QString &/*name*/, const QString &/*publicId*/,
                                    const QString &/*systemId*/, const QString &/*notationName*/)
{
    // ###
    return true;
}


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

XMLTokenizer::XMLTokenizer(DOM::DocumentPtr *_doc, KHTMLView *_view)
{
    m_doc = _doc;
    if ( m_doc ) m_doc->ref();
    m_view = _view;
    m_xmlCode = "";
    m_scriptsIt = 0;
    m_cachedScript = 0;
}

XMLTokenizer::~XMLTokenizer()
{
    if ( m_doc ) m_doc->deref();
    if (m_scriptsIt)
        delete m_scriptsIt;
    if (m_cachedScript)
        m_cachedScript->deref(this);
}


void XMLTokenizer::begin()
{
}

void XMLTokenizer::write(const TokenizerString &s, bool /*appendData*/ )
{
    m_xmlCode += s.toString();
}

void XMLTokenizer::end()
{
    emit finishedParsing();
}

void XMLTokenizer::finish()
{
    // parse xml file
    XMLHandler* handler = m_doc->document()->createTokenHandler();
    QXmlInputSource source;
    source.setData(m_xmlCode);
    QXmlSimpleReader reader;
    reader.setContentHandler( handler );
    reader.setLexicalHandler( handler );
    reader.setErrorHandler( handler );
    reader.setDeclHandler( handler );
    reader.setDTDHandler( handler );
    bool ok = reader.parse( source );

    if (!ok) {
        // One or more errors occurred during parsing of the code. Display an error block to the user above
        // the normal content (the DOM tree is created manually and includes line/col info regarding 
        // where the errors are located)

        // Create elements for display
        int exceptioncode = 0;
        DocumentImpl *doc = m_doc->document();
        NodeImpl* root = doc->documentElement();
        if (!root) {
            root = doc->createElementNS(XHTML_NAMESPACE, "html", exceptioncode);
            NodeImpl* body = doc->createElementNS(XHTML_NAMESPACE, "body", exceptioncode);
            root->appendChild(body, exceptioncode);
            doc->appendChild(root, exceptioncode);
            root = body;
        }

        ElementImpl* reportDiv = doc->createElementNS(XHTML_NAMESPACE, "div", exceptioncode);
        reportDiv->setAttribute(ATTR_STYLE, "white-space: pre; border: 2px solid #c77; padding: 0 1em 0 1em; margin: 1em; background-color: #fdd; color: black");
        ElementImpl* h3 = doc->createElementNS(XHTML_NAMESPACE, "h3", exceptioncode);
        h3->appendChild(doc->createTextNode("This page contains the following errors:"), exceptioncode);
        reportDiv->appendChild(h3, exceptioncode);
        ElementImpl* fixed = doc->createElementNS(XHTML_NAMESPACE, "div", exceptioncode);
        fixed->setAttribute(ATTR_STYLE, "font-family:monospace;font-size:12px");
        NodeImpl* textNode = doc->createTextNode(handler->errorProtocol());
        fixed->appendChild(textNode, exceptioncode);
        reportDiv->appendChild(fixed, exceptioncode);
        h3 = doc->createElementNS(XHTML_NAMESPACE, "h3", exceptioncode);
        h3->appendChild(doc->createTextNode("Below is a rendering of the page up to the first error."), exceptioncode);
        reportDiv->appendChild(h3, exceptioncode);
        
        root->insertBefore(reportDiv, root->firstChild(), exceptioncode);

        m_doc->document()->recalcStyle( NodeImpl::Inherit );
        m_doc->document()->updateRendering();

        end();
    }
    else {
        // Parsing was successful. Now locate all html <script> tags in the document and execute them
        // one by one
        addScripts(m_doc->document());
        m_scriptsIt = new QPtrListIterator<HTMLScriptElementImpl>(m_scripts);
        executeScripts();
    }

    delete handler;
}

void XMLTokenizer::addScripts(NodeImpl *n)
{
    // Recursively go through the entire document tree, looking for html <script> tags. For each of these
    // that is found, add it to the m_scripts list from which they will be executed

    if (n->id() == ID_SCRIPT) {
        m_scripts.append(static_cast<HTMLScriptElementImpl*>(n));
    }

    NodeImpl *child;
    for (child = n->firstChild(); child; child = child->nextSibling())
        addScripts(child);
}

void XMLTokenizer::executeScripts()
{
    // Iterate through all of the html <script> tags in the document. For those that have a src attribute,
    // start loading the script and return (executeScripts() will be called again once the script is loaded
    // and continue where it left off). For scripts that don't have a src attribute, execute the code
    // inside the tag
    while (m_scriptsIt->current()) {
        DOMString scriptSrc = m_scriptsIt->current()->getAttribute(ATTR_SRC);
        QString charset = m_scriptsIt->current()->getAttribute(ATTR_CHARSET).string();

	// don't load external scripts for standalone documents (for now)
        if (scriptSrc != "" && m_doc->document()->part()) {
            // we have a src attribute
            m_cachedScript = m_doc->document()->docLoader()->requestScript(scriptSrc, charset);
            ++(*m_scriptsIt);
            m_cachedScript->ref(this); // will call executeScripts() again if already cached
            return;
        }
        else {
            // no src attribute - execute from contents of tag
            QString scriptCode = "";
            NodeImpl *child;
            for (child = m_scriptsIt->current()->firstChild(); child; child = child->nextSibling()) {
                if (child->nodeType() == Node::TEXT_NODE || child->nodeType() == Node::CDATA_SECTION_NODE) {
                    scriptCode += static_cast<TextImpl*>(child)->data().string();
                }
            }
            // the script cannot do document.write until we support incremental parsing
            // ### handle the case where the script deletes the node or redirects to
            // another page, etc. (also in notifyFinished())
            // ### the script may add another script node after this one which should be executed
            if (m_view) {
                m_view->part()->executeScript(scriptCode);
            }
            ++(*m_scriptsIt);
        }
    }

    // All scripts have finished executing, so calculate the style for the document and close
    // the last element
    m_doc->document()->updateStyleSelector();

    // We are now finished parsing
    end();
}

void XMLTokenizer::notifyFinished(CachedObject *finishedObj)
{
    // This is called when a script has finished loading that was requested from executeScripts(). We execute
    // the script, and then call executeScripts() again to continue iterating through the list of scripts in
    // the document
    if (finishedObj == m_cachedScript) {
        DOMString scriptSource = m_cachedScript->script();
        m_cachedScript->deref(this);
        m_cachedScript = 0;
        m_view->part()->executeScript(scriptSource.string());
        executeScripts();
    }
}

bool XMLTokenizer::isWaitingForScripts()
{
    return m_cachedScript != 0;
}

}

#include "xml_tokenizer.moc"