khtml Library API Documentation

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 *, const QStringList & ) 00054 { 00055 return new KHTMLImage( parentWidget, widgetName, parent, name ); 00056 } 00057 00058 KHTMLImage::KHTMLImage( QWidget *parentWidget, const char *widgetName, 00059 QObject *parent, const char *name ) 00060 : KParts::ReadOnlyPart( parent, name ), m_image( 0 ) 00061 { 00062 setInstance( KHTMLImageFactory::instance() ); 00063 00064 QVBox *box = new QVBox( parentWidget, widgetName ); 00065 00066 m_khtml = new KHTMLPart( box, widgetName, this, "htmlimagepart", KHTMLPart::BrowserViewGUI ); 00067 m_khtml->setAutoloadImages( true ); 00068 m_khtml->widget()->installEventFilter(this); 00069 00070 setWidget( box ); 00071 00072 // VBox can't take focus, so pass it on to sub-widget 00073 box->setFocusProxy( m_khtml->widget() ); 00074 00075 m_ext = new KHTMLImageBrowserExtension( this, "be" ); 00076 00077 // Remove unnecessary actions. 00078 KAction *encodingAction = actionCollection()->action( "setEncoding" ); 00079 if ( encodingAction ) 00080 { 00081 encodingAction->unplugAll(); 00082 delete encodingAction; 00083 } 00084 KAction *viewSourceAction= actionCollection()->action( "viewDocumentSource" ); 00085 if ( viewSourceAction ) 00086 { 00087 viewSourceAction->unplugAll(); 00088 delete viewSourceAction; 00089 } 00090 00091 KAction *selectAllAction= actionCollection()->action( "selectAll" ); 00092 if ( selectAllAction ) 00093 { 00094 selectAllAction->unplugAll(); 00095 delete selectAllAction; 00096 } 00097 00098 // forward important signals from the khtml part 00099 00100 // forward opening requests to parent frame (if existing) 00101 KHTMLPart *p = ::qt_cast<KHTMLPart *>(parent); 00102 KParts::BrowserExtension *be = p ? p->browserExtension() : m_ext; 00103 connect(m_khtml->browserExtension(), SIGNAL(openURLRequestDelayed(const KURL &, const KParts::URLArgs &)), 00104 be, SIGNAL(openURLRequestDelayed(const KURL &, const KParts::URLArgs &))); 00105 00106 connect( m_khtml->browserExtension(), SIGNAL( popupMenu( KXMLGUIClient *, const QPoint &, const KURL &, 00107 const KParts::URLArgs &, KParts::BrowserExtension::PopupFlags, mode_t) ), m_ext, SIGNAL( popupMenu( KXMLGUIClient *, const QPoint &, const KURL &, 00108 const KParts::URLArgs &, KParts::BrowserExtension::PopupFlags, mode_t) ) ); 00109 00110 connect( m_khtml->browserExtension(), SIGNAL( enableAction( const char *, bool ) ), 00111 m_ext, SIGNAL( enableAction( const char *, bool ) ) ); 00112 00113 m_ext->setURLDropHandlingEnabled( true ); 00114 } 00115 00116 KHTMLImage::~KHTMLImage() 00117 { 00118 disposeImage(); 00119 00120 // important: delete the html part before the part or qobject destructor runs. 00121 // we now delete the htmlpart which deletes the part's widget which makes 00122 // _OUR_ m_widget 0 which in turn avoids our part destructor to delete the 00123 // widget ;-) 00124 // ### additional note: it _can_ be that the part has been deleted before: 00125 // when we're in a html frameset and the view dies first, then it will also 00126 // kill the htmlpart 00127 if ( m_khtml ) 00128 delete static_cast<KHTMLPart *>( m_khtml ); 00129 } 00130 00131 bool KHTMLImage::openURL( const KURL &url ) 00132 { 00133 static const QString &html = KGlobal::staticQString( "<html><body><img src=\"%1\"></body></html>" ); 00134 00135 disposeImage(); 00136 00137 m_url = url; 00138 00139 emit started( 0 ); 00140 00141 KParts::URLArgs args = m_ext->urlArgs(); 00142 m_mimeType = args.serviceType; 00143 00144 emit setWindowCaption( url.prettyURL() ); 00145 00146 m_khtml->begin( m_url, args.xOffset, args.yOffset ); 00147 m_khtml->setAutoloadImages( true ); 00148 00149 DOM::DocumentImpl *impl = dynamic_cast<DOM::DocumentImpl *>( m_khtml->document().handle() ); // ### hack ;-) 00150 if ( impl && m_ext->urlArgs().reload ) 00151 impl->docLoader()->setCachePolicy( KIO::CC_Refresh ); 00152 00153 khtml::DocLoader *dl = impl ? impl->docLoader() : 0; 00154 m_image = dl->requestImage( m_url.url() ); 00155 if ( m_image ) 00156 m_image->ref( this ); 00157 00158 m_khtml->write( html.arg( m_url.url() ) ); 00159 m_khtml->end(); 00160 00161 /* 00162 connect( khtml::Cache::loader(), SIGNAL( requestDone( khtml::DocLoader*, khtml::CachedObject *) ), 00163 this, SLOT( updateWindowCaption() ) ); 00164 */ 00165 return true; 00166 } 00167 00168 bool KHTMLImage::closeURL() 00169 { 00170 disposeImage(); 00171 return m_khtml->closeURL(); 00172 } 00173 00174 void KHTMLImage::notifyFinished( khtml::CachedObject *o ) 00175 { 00176 if ( !m_image || o != m_image ) 00177 return; 00178 00179 const QPixmap &pix = m_image->pixmap(); 00180 QString caption; 00181 00182 KMimeType::Ptr mimeType; 00183 if ( !m_mimeType.isEmpty() ) 00184 mimeType = KMimeType::mimeType( m_mimeType ); 00185 00186 if ( mimeType ) 00187 caption = i18n( "%1 - %2x%3 Pixels" ).arg( mimeType->comment() ) 00188 .arg( pix.width() ).arg( pix.height() ); 00189 else 00190 caption = i18n( "Image - %1x%2 Pixels" ).arg( pix.width() ).arg( pix.height() ); 00191 00192 emit setWindowCaption( caption ); 00193 emit completed(); 00194 emit setStatusBarText(i18n("Done.")); 00195 } 00196 00197 void KHTMLImage::guiActivateEvent( KParts::GUIActivateEvent *e ) 00198 { 00199 // prevent the base implementation from emitting setWindowCaption with 00200 // our url. It destroys our pretty, previously caption. Konq saves/restores 00201 // the caption for us anyway. 00202 if ( e->activated() ) 00203 return; 00204 KParts::ReadOnlyPart::guiActivateEvent(e); 00205 } 00206 00207 /* 00208 void KHTMLImage::slotImageJobFinished( KIO::Job *job ) 00209 { 00210 if ( job->error() ) 00211 { 00212 job->showErrorDialog(); 00213 emit canceled( job->errorString() ); 00214 } 00215 else 00216 { 00217 if ( m_khtml->view()->contentsY() == 0 ) 00218 { 00219 KParts::URLArgs args = m_ext->urlArgs(); 00220 m_khtml->view()->setContentsPos( args.xOffset, args.yOffset ); 00221 } 00222 00223 emit completed(); 00224 00225 QTimer::singleShot( 0, this, SLOT( updateWindowCaption() ) ); 00226 } 00227 } 00228 00229 void KHTMLImage::updateWindowCaption() 00230 { 00231 if ( !m_khtml ) 00232 return; 00233 00234 DOM::HTMLDocumentImpl *impl = dynamic_cast<DOM::HTMLDocumentImpl *>( m_khtml->document().handle() ); 00235 if ( !impl ) 00236 return; 00237 00238 DOM::HTMLElementImpl *body = impl->body(); 00239 if ( !body ) 00240 return; 00241 00242 DOM::NodeImpl *image = body->firstChild(); 00243 if ( !image ) 00244 return; 00245 00246 khtml::RenderImage *renderImage = dynamic_cast<khtml::RenderImage *>( image->renderer() ); 00247 if ( !renderImage ) 00248 return; 00249 00250 QPixmap pix = renderImage->pixmap(); 00251 00252 QString caption; 00253 00254 KMimeType::Ptr mimeType; 00255 if ( !m_mimeType.isEmpty() ) 00256 mimeType = KMimeType::mimeType( m_mimeType ); 00257 00258 if ( mimeType ) 00259 caption = i18n( "%1 - %2x%3 Pixels" ).arg( mimeType->comment() ) 00260 .arg( pix.width() ).arg( pix.height() ); 00261 else 00262 caption = i18n( "Image - %1x%2 Pixels" ).arg( pix.width() ).arg( pix.height() ); 00263 00264 emit setWindowCaption( caption ); 00265 emit completed(); 00266 emit setStatusBarText(i18n("Done.")); 00267 } 00268 */ 00269 00270 void KHTMLImage::disposeImage() 00271 { 00272 if ( !m_image ) 00273 return; 00274 00275 m_image->deref( this ); 00276 m_image = 0; 00277 } 00278 00279 bool KHTMLImage::eventFilter(QObject *, QEvent *e) { 00280 switch (e->type()) { 00281 case QEvent::DragEnter: 00282 case QEvent::DragMove: 00283 case QEvent::DragLeave: 00284 case QEvent::Drop: { 00285 // find out if this part is embedded in a frame, and send the 00286 // event to its outside widget 00287 KHTMLPart *p = ::qt_cast<KHTMLPart *>(parent()); 00288 if (p) 00289 return QApplication::sendEvent(p->widget(), e); 00290 // otherwise simply forward all dnd events to the part widget, 00291 // konqueror will handle them properly there 00292 return QApplication::sendEvent(widget(), e); 00293 } 00294 default: ; 00295 } 00296 return false; 00297 } 00298 00299 KHTMLImageBrowserExtension::KHTMLImageBrowserExtension( KHTMLImage *parent, const char *name ) 00300 : KParts::BrowserExtension( parent, name ) 00301 { 00302 m_imgPart = parent; 00303 } 00304 00305 int KHTMLImageBrowserExtension::xOffset() 00306 { 00307 return m_imgPart->doc()->view()->contentsX(); 00308 } 00309 00310 int KHTMLImageBrowserExtension::yOffset() 00311 { 00312 return m_imgPart->doc()->view()->contentsY(); 00313 } 00314 00315 void KHTMLImageBrowserExtension::print() 00316 { 00317 static_cast<KHTMLPartBrowserExtension *>( m_imgPart->doc()->browserExtension() )->print(); 00318 } 00319 00320 void KHTMLImageBrowserExtension::reparseConfiguration() 00321 { 00322 static_cast<KHTMLPartBrowserExtension *>( m_imgPart->doc()->browserExtension() )->reparseConfiguration(); 00323 m_imgPart->doc()->setAutoloadImages( true ); 00324 } 00325 00326 using namespace KParts; 00327 00328 /* vim: et sw=4 ts=4 00329 */ 00330 00331 #include "khtmlimage.moc"
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This file is part of the documentation for khtml Library Version 3.2.3.
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