# khtml Library API Documentation

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# khtmlimage.cpp

    00001 /* This file is part of the KDE project
    00002    Copyright (C) 2000 Simon Hausmann <hausmann@kde.org>
    00003
    00004    This library is free software; you can redistribute it and/or
    00005    modify it under the terms of the GNU Library General Public
    00006    License as published by the Free Software Foundation; either
    00007    version 2 of the License, or (at your option) any later version.
    00008
    00009    This library is distributed in the hope that it will be useful,
    00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00012    Library General Public License for more details.
    00013
    00014    You should have received a copy of the GNU Library General Public License
    00015    along with this library; see the file COPYING.LIB.  If not, write to
    00016    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00017    Boston, MA 02111-1307, USA.
    00018 */
    00019
    00020 #include "khtmlimage.h"
    00021 #include "khtmlview.h"
    00022 #include "khtml_ext.h"
    00023 #include "xml/dom_docimpl.h"
    00024 #include "html/html_documentimpl.h"
    00025 #include "html/html_elementimpl.h"
    00026 #include "rendering/render_image.h"
    00027 #include "misc/loader.h"
    00028
    00029 #include <qvbox.h>
    00030 #include <qtimer.h>
    00031
    00032 #include <kio/job.h>
    00033 #include <kinstance.h>
    00034 #include <kmimetype.h>
    00035 #include <klocale.h>
    00036
    00037 K_EXPORT_COMPONENT_FACTORY( khtmlimagefactory /*NOT the part name, see Makefile.am*/, KHTMLImageFactory )
    00038
    00039 KInstance *KHTMLImageFactory::s_instance = 0;
    00040
    00041 KHTMLImageFactory::KHTMLImageFactory()
    00042 {
    00043     s_instance = new KInstance( "khtmlimage" );
    00044 }
    00045
    00046 KHTMLImageFactory::~KHTMLImageFactory()
    00047 {
    00048     delete s_instance;
    00049 }
    00050
    00051 KParts::Part *KHTMLImageFactory::createPartObject( QWidget *parentWidget, const char *widgetName,
    00052                                                    QObject *parent, const char *name,
    00053                                                    const char *className, const QStringList & )
    00054 {
    00055   KHTMLPart::GUIProfile prof = KHTMLPart::DefaultGUI;
    00056   if ( strcmp( className, "Browser/View" ) == 0 )
    00057     prof = KHTMLPart::BrowserViewGUI;
    00058   return new KHTMLImage( parentWidget, widgetName, parent, name, prof );
    00059 }
    00060
    00061 KHTMLImage::KHTMLImage( QWidget *parentWidget, const char *widgetName,
    00062                         QObject *parent, const char *name, KHTMLPart::GUIProfile prof )
    00063     : KParts::ReadOnlyPart( parent, name ), m_image( 0 )
    00064 {
    00065     KHTMLPart* parentPart = ::qt_cast<KHTMLPart *>( parent );
    00066     setInstance( KHTMLImageFactory::instance(), prof == KHTMLPart::BrowserViewGUI && !parentPart );
    00067
    00068     QVBox *box = new QVBox( parentWidget, widgetName );
    00069
    00070     m_khtml = new KHTMLPart( box, widgetName, this, "htmlimagepart", prof );
    00071     m_khtml->setAutoloadImages( true );
    00072     m_khtml->widget()->installEventFilter(this);
    00073
    00074     setWidget( box );
    00075
    00076     // VBox can't take focus, so pass it on to sub-widget
    00077     box->setFocusProxy( m_khtml->widget() );
    00078
    00079     m_ext = new KHTMLImageBrowserExtension( this, "be" );
    00080
    00081     // Remove unnecessary actions.
    00082     KAction *encodingAction = actionCollection()->action( "setEncoding" );
    00083     if ( encodingAction )
    00084     {
    00085         encodingAction->unplugAll();
    00086         delete encodingAction;
    00087     }
    00088     KAction *viewSourceAction= actionCollection()->action( "viewDocumentSource" );
    00089     if ( viewSourceAction )
    00090     {
    00091         viewSourceAction->unplugAll();
    00092         delete viewSourceAction;
    00093     }
    00094
    00095     KAction *selectAllAction= actionCollection()->action( "selectAll" );
    00096     if ( selectAllAction )
    00097     {
    00098         selectAllAction->unplugAll();
    00099         delete selectAllAction;
    00100     }
    00101
    00102     // forward important signals from the khtml part
    00103
    00104     // forward opening requests to parent frame (if existing)
    00105     KHTMLPart *p = ::qt_cast<KHTMLPart *>(parent);
    00106     KParts::BrowserExtension *be = p ? p->browserExtension() : m_ext;
    00107     connect(m_khtml->browserExtension(), SIGNAL(openURLRequestDelayed(const KURL &, const KParts::URLArgs &)),
    00108             be, SIGNAL(openURLRequestDelayed(const KURL &, const KParts::URLArgs &)));
    00109
    00110     connect( m_khtml->browserExtension(), SIGNAL( popupMenu( KXMLGUIClient *, const QPoint &, const KURL &,
    00111              const KParts::URLArgs &, KParts::BrowserExtension::PopupFlags, mode_t) ), m_ext, SIGNAL( popupMenu( KXMLGUIClient *, const QPoint &, const KURL &,
    00112              const KParts::URLArgs &, KParts::BrowserExtension::PopupFlags, mode_t) ) );
    00113
    00114     connect( m_khtml->browserExtension(), SIGNAL( enableAction( const char *, bool ) ),
    00115              m_ext, SIGNAL( enableAction( const char *, bool ) ) );
    00116
    00117     m_ext->setURLDropHandlingEnabled( true );
    00118 }
    00119
    00120 KHTMLImage::~KHTMLImage()
    00121 {
    00122     disposeImage();
    00123
    00124     // important: delete the html part before the part or qobject destructor runs.
    00125     // we now delete the htmlpart which deletes the part's widget which makes
    00126     // _OUR_ m_widget 0 which in turn avoids our part destructor to delete the
    00127     // widget ;-)
    00128     // ### additional note: it _can_ be that the part has been deleted before:
    00129     // when we're in a html frameset and the view dies first, then it will also
    00130     // kill the htmlpart
    00131     if ( m_khtml )
    00132         delete static_cast<KHTMLPart *>( m_khtml );
    00133 }
    00134
    00135 bool KHTMLImage::openURL( const KURL &url )
    00136 {
    00137     static const QString &html = KGlobal::staticQString( "<html><body><img src=\"%1\"></body></html>" );
    00138
    00139     disposeImage();
    00140
    00141     m_url = url;
    00142
    00143     emit started( 0 );
    00144
    00145     KParts::URLArgs args = m_ext->urlArgs();
    00146     m_mimeType = args.serviceType;
    00147
    00148     emit setWindowCaption( url.prettyURL() );
    00149
    00150     m_khtml->begin( m_url, args.xOffset, args.yOffset );
    00151     m_khtml->setAutoloadImages( true );
    00152
    00153     DOM::DocumentImpl *impl = dynamic_cast<DOM::DocumentImpl *>( m_khtml->document().handle() ); // ### hack ;-)
    00154     if ( impl && m_ext->urlArgs().reload )
    00155         impl->docLoader()->setCachePolicy( KIO::CC_Reload );
    00156
    00157     khtml::DocLoader *dl = impl ? impl->docLoader() : 0;
    00158     m_image = dl->requestImage( m_url.url() );
    00159     if ( m_image )
    00160         m_image->ref( this );
    00161
    00162     m_khtml->write( html.arg( m_url.url() ) );
    00163     m_khtml->end();
    00164
    00165     /*
    00166     connect( khtml::Cache::loader(), SIGNAL( requestDone( khtml::DocLoader*, khtml::CachedObject *) ),
    00167             this, SLOT( updateWindowCaption() ) );
    00168             */
    00169     return true;
    00170 }
    00171
    00172 bool KHTMLImage::closeURL()
    00173 {
    00174     disposeImage();
    00175     return m_khtml->closeURL();
    00176 }
    00177
    00178 void KHTMLImage::notifyFinished( khtml::CachedObject *o )
    00179 {
    00180     if ( !m_image || o != m_image )
    00181         return;
    00182
    00183     const QPixmap &pix = m_image->pixmap();
    00184     QString caption;
    00185
    00186     KMimeType::Ptr mimeType;
    00187     if ( !m_mimeType.isEmpty() )
    00188         mimeType = KMimeType::mimeType( m_mimeType );
    00189
    00190     if ( mimeType ) {
    00191         if (m_image && !m_image->suggestedTitle().isEmpty()) {
    00192             caption = i18n( "%1 (%2 - %3x%4 Pixels)" ).arg( m_image->suggestedTitle(), mimeType->comment() ).arg( pix.width() ).arg( pix.height() );
    00193         } else {
    00194             caption = i18n( "%1 - %2x%3 Pixels" ).arg( mimeType->comment() )
    00195                 .arg( pix.width() ).arg( pix.height() );
    00196         }
    00197     } else {
    00198         if (m_image && !m_image->suggestedTitle().isEmpty()) {
    00199             caption = i18n( "%1 (%2x%3 Pixels)" ).arg(m_image->suggestedTitle()).arg( pix.width() ).arg( pix.height() );
    00200         } else {
    00201             caption = i18n( "Image - %1x%2 Pixels" ).arg( pix.width() ).arg( pix.height() );
    00202         }
    00203     }
    00204
    00205     emit setWindowCaption( caption );
    00206     emit completed();
    00207     emit setStatusBarText(i18n("Done."));
    00208 }
    00209
    00210 void KHTMLImage::guiActivateEvent( KParts::GUIActivateEvent *e )
    00211 {
    00212     // prevent the base implementation from emitting setWindowCaption with
    00213     // our url. It destroys our pretty, previously caption. Konq saves/restores
    00214     // the caption for us anyway.
    00215     if ( e->activated() )
    00216         return;
    00217     KParts::ReadOnlyPart::guiActivateEvent(e);
    00218 }
    00219
    00220 /*
    00221 void KHTMLImage::slotImageJobFinished( KIO::Job *job )
    00222 {
    00223     if ( job->error() )
    00224     {
    00225         job->showErrorDialog();
    00226         emit canceled( job->errorString() );
    00227     }
    00228     else
    00229     {
    00230         if ( m_khtml->view()->contentsY() == 0 )
    00231         {
    00232             KParts::URLArgs args = m_ext->urlArgs();
    00233             m_khtml->view()->setContentsPos( args.xOffset, args.yOffset );
    00234         }
    00235
    00236         emit completed();
    00237
    00238         QTimer::singleShot( 0, this, SLOT( updateWindowCaption() ) );
    00239     }
    00240 }
    00241
    00242 void KHTMLImage::updateWindowCaption()
    00243 {
    00244     if ( !m_khtml )
    00245         return;
    00246
    00247     DOM::HTMLDocumentImpl *impl = dynamic_cast<DOM::HTMLDocumentImpl *>( m_khtml->document().handle() );
    00248     if ( !impl )
    00249         return;
    00250
    00251     DOM::HTMLElementImpl *body = impl->body();
    00252     if ( !body )
    00253         return;
    00254
    00255     DOM::NodeImpl *image = body->firstChild();
    00256     if ( !image )
    00257         return;
    00258
    00259     khtml::RenderImage *renderImage = dynamic_cast<khtml::RenderImage *>( image->renderer() );
    00260     if ( !renderImage )
    00261         return;
    00262
    00263     QPixmap pix = renderImage->pixmap();
    00264
    00265     QString caption;
    00266
    00267     KMimeType::Ptr mimeType;
    00268     if ( !m_mimeType.isEmpty() )
    00269         mimeType = KMimeType::mimeType( m_mimeType );
    00270
    00271     if ( mimeType )
    00272         caption = i18n( "%1 - %2x%3 Pixels" ).arg( mimeType->comment() )
    00273                   .arg( pix.width() ).arg( pix.height() );
    00274     else
    00275         caption = i18n( "Image - %1x%2 Pixels" ).arg( pix.width() ).arg( pix.height() );
    00276
    00277     emit setWindowCaption( caption );
    00278     emit completed();
    00279     emit setStatusBarText(i18n("Done."));
    00280 }
    00281 */
    00282
    00283 void KHTMLImage::disposeImage()
    00284 {
    00285     if ( !m_image )
    00286         return;
    00287
    00288     m_image->deref( this );
    00289     m_image = 0;
    00290 }
    00291
    00292 bool KHTMLImage::eventFilter(QObject *, QEvent *e) {
    00293     switch (e->type()) {
    00294       case QEvent::DragEnter:
    00295       case QEvent::DragMove:
    00296       case QEvent::DragLeave:
    00297       case QEvent::Drop: {
    00298         // find out if this part is embedded in a frame, and send the
    00299     // event to its outside widget
    00300     KHTMLPart *p = ::qt_cast<KHTMLPart *>(parent());
    00301     if (p)
    00302         return QApplication::sendEvent(p->widget(), e);
    00303         // otherwise simply forward all dnd events to the part widget,
    00304     // konqueror will handle them properly there
    00305         return QApplication::sendEvent(widget(), e);
    00306       }
    00307       default: ;
    00308     }
    00309     return false;
    00310 }
    00311
    00312 KHTMLImageBrowserExtension::KHTMLImageBrowserExtension( KHTMLImage *parent, const char *name )
    00313     : KParts::BrowserExtension( parent, name )
    00314 {
    00315     m_imgPart = parent;
    00316 }
    00317
    00318 int KHTMLImageBrowserExtension::xOffset()
    00319 {
    00320     return m_imgPart->doc()->view()->contentsX();
    00321 }
    00322
    00323 int KHTMLImageBrowserExtension::yOffset()
    00324 {
    00325     return m_imgPart->doc()->view()->contentsY();
    00326 }
    00327
    00328 void KHTMLImageBrowserExtension::print()
    00329 {
    00330     static_cast<KHTMLPartBrowserExtension *>( m_imgPart->doc()->browserExtension() )->print();
    00331 }
    00332
    00333 void KHTMLImageBrowserExtension::reparseConfiguration()
    00334 {
    00335     static_cast<KHTMLPartBrowserExtension *>( m_imgPart->doc()->browserExtension() )->reparseConfiguration();
    00336     m_imgPart->doc()->setAutoloadImages( true );
    00337 }
    00338
    00339 using namespace KParts;
    00340
    00341 /* vim: et sw=4 ts=4
    00342  */
    00343
    00344 #include "khtmlimage.moc"

This file is part of the documentation for khtml Library Version 3.4.1.
Documentation copyright © 1996-2004 the KDE developers.
Generated on Sat Jun 11 20:33:15 2005 by doxygen 1.4.1 written by Dimitri van Heesch, © 1997-2003