khtml_part.cpp

khtml在gtk上的移植版本

  // in case we have a) no frameset (don't test m_frames.count(), iframes get in there)
  // b) the url is identical with the currently
  // displayed one (except for the htmlref!) , c) the url request is not a POST
  // operation and d) the caller did not request to reload the page we try to
  // be smart and instead of reloading the whole document we just jump to the
  // request html anchor
  if (d->m_doc) {
      bool isFrameSet = false;
      if ( d->m_doc->isHTMLDocument() ) {
          HTMLDocumentImpl* htmlDoc = static_cast<HTMLDocumentImpl*>(d->m_doc);
          isFrameSet = htmlDoc->body() && (htmlDoc->body()->id() == ID_FRAMESET);
      }
      if ( !isFrameSet &&
           urlcmp( url.url(), m_url.url(), true, true ) &&
           url.hasRef() && !args.doPost() && !args.reload )
      {
        kdDebug( 6050 ) << "KHTMLPart::openURL, jumping to anchor. m_url = " << url.url() << endl;
        m_url = url;
        emit started( 0L );

        gotoAnchor();

        d->m_bComplete = true;
        d->m_doc->setParsing(false);

        kdDebug( 6050 ) << "completed..." << endl;
        emit completed();
        return true;
      }
  }
#endif // APPLE_CHANGES

  if (!d->m_restored)
  {
    kdDebug( 6050 ) << "closing old URL" << endl;
    closeURL();
  }

#if !APPLE_CHANGES
  args.metaData().insert("main_frame_request", parentPart() == 0 ? "TRUE" : "FALSE" );
  args.metaData().insert("ssl_was_in_use", d->m_ssl_in_use ? "TRUE" : "FALSE" );
  args.metaData().insert("ssl_activate_warnings", "TRUE" );
#endif

  if (d->m_restored)
     d->m_cachePolicy = KIO::CC_Cache;
  else if (args.reload)
     d->m_cachePolicy = KIO::CC_Refresh;
  else
     d->m_cachePolicy = KIO::CC_Verify;

  if ( args.doPost() && (url.protocol().startsWith("http")) )
  {
      d->m_job = KIO::http_post( url, args.postData, false );
      d->m_job->addMetaData("content-type", args.contentType() );
  }
  else
  {
      d->m_job = KIO::get( url, false, false );
      d->m_job->addMetaData("cache", KIO::getCacheControlString(d->m_cachePolicy));
  }

  d->m_job->addMetaData(args.metaData());

  connect( d->m_job, SIGNAL( result( KIO::Job * ) ),
           SLOT( slotFinished( KIO::Job * ) ) );
#if !APPLE_CHANGES
  connect( d->m_job, SIGNAL( data( KIO::Job*, const QByteArray &)),
           SLOT( slotData( KIO::Job*, const QByteArray &)));
#endif

  connect( d->m_job, SIGNAL(redirection(KIO::Job*, const KURL&) ),
           SLOT( slotRedirection(KIO::Job*,const KURL&) ) );

  d->m_bComplete = false;
  d->m_bLoadEventEmitted = false;

  // delete old status bar msg's from kjs (if it _was_ activated on last URL)
  if( d->m_bJScriptEnabled )
  {
     d->m_kjsStatusBarText = QString::null;
     d->m_kjsDefaultStatusBarText = QString::null;
  }

  // set the javascript flags according to the current url
#if !APPLE_CHANGES
  d->m_bJScriptDebugEnabled = KHTMLFactory::defaultHTMLSettings()->isJavaScriptDebugEnabled();
  d->m_bJavaEnabled = KHTMLFactory::defaultHTMLSettings()->isJavaEnabled(url.host());
  d->m_bPluginsEnabled = KHTMLFactory::defaultHTMLSettings()->isPluginsEnabled(url.host());
#else
  d->m_bJScriptDebugEnabled = d->m_settings->isJavaScriptDebugEnabled();
  d->m_bJavaEnabled = d->m_settings->isJavaEnabled(url.host());
  d->m_bPluginsEnabled = d->m_settings->isPluginsEnabled(url.host());
#endif

  // initializing m_url to the new url breaks relative links when opening such a link after this call and _before_ begin() is called (when the first
  // data arrives) (Simon)
  m_url = url;
  if(m_url.protocol().startsWith( "http" ) && !m_url.host().isEmpty() &&
     m_url.path().isEmpty()) {
    m_url.setPath("/");
    emit d->m_extension->setLocationBarURL( m_url.prettyURL() );
  }
  // copy to m_workingURL after fixing m_url above
  d->m_workingURL = m_url;

  kdDebug( 6050 ) << "KHTMLPart::openURL now (before started) m_url = " << m_url.url() << endl;

  connect( d->m_job, SIGNAL( speed( KIO::Job*, unsigned long ) ),
           this, SLOT( slotJobSpeed( KIO::Job*, unsigned long ) ) );

  connect( d->m_job, SIGNAL( percent( KIO::Job*, unsigned long ) ),
           this, SLOT( slotJobPercent( KIO::Job*, unsigned long ) ) );

  emit started( 0L );

  return true;
}

bool KHTMLPart::closeURL()
{
  if ( d->m_job )
  {
    KHTMLPageCache::self()->cancelEntry(d->m_cacheId);
    d->m_job->kill();
    d->m_job = 0;
  }

  if ( d->m_doc && d->m_doc->isHTMLDocument() ) {
    HTMLDocumentImpl* hdoc = static_cast<HTMLDocumentImpl*>( d->m_doc );

    if ( hdoc->body() && d->m_bLoadEventEmitted && !d->m_bUnloadEventEmitted ) {
      hdoc->body()->dispatchWindowEvent( EventImpl::UNLOAD_EVENT, false, false );
      if ( d->m_doc )
        d->m_doc->updateRendering();
      d->m_bUnloadEventEmitted = true;
    }
  }

  d->m_bComplete = true; // to avoid emitting completed() in slotFinishedParsing() (David)
  d->m_bLoadEventEmitted = true; // don't want that one either
  d->m_cachePolicy = KIO::CC_Verify; // Why here?

  KHTMLPageCache::self()->cancelFetch(this);
  if ( d->m_doc && d->m_doc->parsing() )
  {
    kdDebug( 6050 ) << " was still parsing... calling end " << endl;
    slotFinishedParsing();
    d->m_doc->setParsing(false);
  }

  if ( !d->m_workingURL.isEmpty() )
  {
    // Aborted before starting to render
    kdDebug( 6050 ) << "Aborted before starting to render, reverting location bar to " << m_url.prettyURL() << endl;
    emit d->m_extension->setLocationBarURL( m_url.prettyURL() );
  }

  d->m_workingURL = KURL();

  if ( d->m_doc && d->m_doc->docLoader() )
    khtml::Cache::loader()->cancelRequests( d->m_doc->docLoader() );

  // tell all subframes to stop as well
  ConstFrameIt it = d->m_frames.begin();
  ConstFrameIt end = d->m_frames.end();
  for (; it != end; ++it )
    if ( !( *it ).m_part.isNull() )
      ( *it ).m_part->closeURL();

  d->m_bPendingChildRedirection = false;

  // Stop any started redirections as well!! (DA)
  cancelRedirection();

  // null node activated.
  emit nodeActivated(Node());

  return true;
}

DOM::HTMLDocument KHTMLPart::htmlDocument() const
{
  if (d->m_doc && d->m_doc->isHTMLDocument())
    return static_cast<HTMLDocumentImpl*>(d->m_doc);
  else
    return static_cast<HTMLDocumentImpl*>(0);
}

DOM::Document KHTMLPart::document() const
{
    return d->m_doc;
}


KParts::BrowserExtension *KHTMLPart::browserExtension() const
{
  return d->m_extension;
}

KHTMLView *KHTMLPart::view() const
{
  return d->m_view;
}

void KHTMLPart::setJScriptEnabled( bool enable )
{
  if ( !enable && jScriptEnabled() && d->m_jscript ) {
    d->m_jscript->clear();
  }
  d->m_bJScriptForce = enable;
  d->m_bJScriptOverride = true;
}

bool KHTMLPart::jScriptEnabled() const
{
  if ( d->m_bJScriptOverride )
      return d->m_bJScriptForce;
  return d->m_bJScriptEnabled;
}

void KHTMLPart::setMetaRefreshEnabled( bool enable )
{
  d->m_metaRefreshEnabled = enable;
}

bool KHTMLPart::metaRefreshEnabled() const
{
  return d->m_metaRefreshEnabled;
}

// Define this to disable dlopening kjs_html, when directly linking to it.
// You need to edit khtml/Makefile.am to add ./ecma/libkjs_html.la to LIBADD
// and to edit khtml/ecma/Makefile.am to s/kjs_html/libkjs_html/, remove libkhtml from LIBADD,
//        remove LDFLAGS line, and replace kde_module with either lib (shared) or noinst (static)
//#define DIRECT_LINKAGE_TO_ECMA

#ifdef DIRECT_LINKAGE_TO_ECMA
extern "C" { KJSProxy *kjs_html_init(KHTMLPart *khtmlpart); }
#endif

KJSProxy *KHTMLPart::jScript()
{
  if (!jScriptEnabled()){
    return 0;
  }

  if ( !d->m_jscript )
  {
#ifndef DIRECT_LINKAGE_TO_ECMA
    KLibrary *lib = KLibLoader::self()->library("kjs_html");
    if ( !lib ) {
      setJScriptEnabled( false );
      return 0;
    }
    // look for plain C init function
    void *sym = lib->symbol("kjs_html_init");
    if ( !sym ) {
      lib->unload();
      setJScriptEnabled( false );
      return 0;
    }
    typedef KJSProxy* (*initFunction)(KHTMLPart *);
    initFunction initSym = (initFunction) sym;
    d->m_jscript = (*initSym)(this);
    d->m_kjs_lib = lib;
#else
    d->m_jscript = kjs_html_init(this);
    // d->m_kjs_lib remains 0L.
#endif
    if (d->m_bJScriptDebugEnabled)
        d->m_jscript->setDebugEnabled(true);
  }

  return d->m_jscript;
}

void KHTMLPart::replaceContentsWithScriptResult( const KURL &url )
{
  QString script = KURL::decode_string(url.url().mid(strlen("javascript:")));
  QVariant ret = executeScript(script);
  
  if (ret.type() == QVariant::String) {
    begin();
    write(ret.asString());
    end();
  }
}

QVariant KHTMLPart::executeScript( const QString &script, bool forceUserGesture )
{
    return executeScript( DOM::Node(), script, forceUserGesture );
}

//Enable this to see all JS scripts being executed
//#define KJS_VERBOSE

QVariant KHTMLPart::executeScript( const DOM::Node &n, const QString &script, bool forceUserGesture )
{
#ifdef KJS_VERBOSE
  kdDebug(6070) << "KHTMLPart::executeScript n=" << n.nodeName().string().latin1() << "(" << (n.isNull() ? 0 : n.nodeType()) << ") " << script << endl;
#endif
  KJSProxy *proxy = jScript();

  if (!proxy || proxy->paused())
    return QVariant();
  d->m_runningScripts++;
  // If forceUserGesture is true, then make the script interpreter
  // treat it as if triggered by a user gesture even if there is no
  // current DOM event being processed.
  QVariant ret = proxy->evaluate( forceUserGesture ? QString::null : m_url.url(), 0, script, n );
  d->m_runningScripts--;
  if (!d->m_runningScripts && d->m_doc && !d->m_doc->parsing() && d->m_submitForm )
      submitFormAgain();
    DocumentImpl::updateDocumentsRendering();

#ifdef KJS_VERBOSE
  kdDebug(6070) << "KHTMLPart::executeScript - done" << endl;
#endif
  return ret;
}

bool KHTMLPart::scheduleScript(const DOM::Node &n, const QString& script)
{
    //kdDebug(6050) << "KHTMLPart::scheduleScript "<< script << endl;

    d->scheduledScript = script;
    d->scheduledScriptNode = n;

    return true;
}

QVariant KHTMLPart::executeScheduledScript()
{
  if( d->scheduledScript.isEmpty() )
    return QVariant();

  //kdDebug(6050) << "executing delayed " << d->scheduledScript << endl;

  QVariant ret = executeScript( d->scheduledScriptNode, d->scheduledScript );
  d->scheduledScript = QString();
  d->scheduledScriptNode = DOM::Node();

  return ret;
}

void KHTMLPart::setJavaEnabled( bool enable )
{
  d->m_bJavaForce = enable;
  d->m_bJavaOverride = true;
}

bool KHTMLPart::javaEnabled() const
{
#ifndef Q_WS_QWS
  if( d->m_bJavaOverride )
      return d->m_bJavaForce;
  return d->m_bJavaEnabled;
#else
  return false;
#endif
}

KJavaAppletContext *KHTMLPart::javaContext()
{
#ifndef Q_WS_QWS
  return d->m_javaContext;
#else
  return 0;
#endif
}

KJavaAppletContext *KHTMLPart::createJavaContext()
{
#ifndef Q_WS_QWS
  if ( !d->m_javaContext ) {
#if APPLE_CHANGES
      d->m_javaContext = new KJavaAppletContext(d->m_dcopobject, this);
#else
      d->m_javaContext = new KJavaAppletContext(d->m_dcopobject);
      connect( d->m_javaContext, SIGNAL(showStatus(const QString&)),
               this, SIGNAL(setStatusBarText(const QString&)) );
      connect( d->m_javaContext, SIGNAL(showDocument(const QString&, const QString&)),
               this, SLOT(slotShowDocument(const QString&, const QString&)) );
#endif
  }

  return d->m_javaContext;
#else
  return 0;
#endif
}

void KHTMLPart::setPluginsEnabled( bool enable )
{
  d->m_bPluginsForce = enable;
  d->m_bPluginsOverride = true;
}

bool KHTMLPart::pluginsEnabled() const
{
  if ( d->m_bPluginsOverride )
      return d->m_bPluginsForce;
  return d->m_bPluginsEnabled;
}

#if !APPLE_CHANGES

void KHTMLPart::slotShowDocument( const QString &url, const QString &target )
{
  // this is mostly copied from KHTMLPart::slotChildURLRequest. The better approach
  // would be to put those functions into a single one.
  khtml::ChildFrame *child = 0;
  KParts::URLArgs args;
  args.frameName = target;

  QString frameName = args.frameName.lower();
  if ( !frameName.isEmpty() )
  {
    if ( frameName == QString::fromLatin1( "_top" ) )
    {
      emit d->m_extension->openURLRequest( url, args );
      return;
    }
    else if ( frameName == QString::fromLatin1( "_blank" ) )
    {
      emit d->m_extension->createNewWindow( url, args );
      return;
    }
    else if ( frameName == QString::fromLatin1( "_parent" ) )
    {
      KParts::URLArgs newArgs( args );
      newArgs.frameName = QString::null;

      emit d->m_extension->openURLRequest( url, newArgs );
      return;
    }
    else if ( frameName != QString::fromLatin1( "_self" ) )
    {
      khtml::ChildFrame *_frame = recursiveFrameRequest( url, args );