messageviewer/webkitparthtmlwriter.cpp

   1 /*  -*- c++ -*-
   2     webkitparthtmlwriter.cpp
   3
   4     This file is part of KMail, the KDE mail client.
   5     Copyright (c) 2003 Marc Mutz <mutz@kde.org>
   6     Copyright (c) 2009 Torgny Nyblom <nyblom@kde.org>
   7
   8     KMail is free software; you can redistribute it and/or modify it
   9     under the terms of the GNU General Public License, version 2, as
  10     published by the Free Software Foundation.
  11
  12     KMail is distributed in the hope that it will be useful, but
  13     WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15     General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with this program; if not, write to the Free Software
  19     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  20
  21     In addition, as a special exception, the copyright holders give
  22     permission to link the code of this program with any edition of
  23     the Qt library by Trolltech AS, Norway (or with modified versions
  24     of Qt that use the same license as Qt), and distribute linked
  25     combinations including the two.  You must obey the GNU General
  26     Public License in all respects for all of the code used other than
  27     Qt.  If you modify this file, you may extend this exception to
  28     your version of the file, but you are not obligated to do so.  If
  29     you do not wish to do so, delete this exception statement from
  30     your version.
  31 */
  32
  33
  34 #include <config-messageviewer.h>
  35
  36 #include "webkitparthtmlwriter.h"
  37
  38 #include "mailwebview.h"
  39
  40 #include <KDebug>
  41 #include <KUrl>
  42
  43 #include <cassert>
  44 #include <QByteArray>
  45 #include <QWebView>
  46 #include <QWebPage>
  47 #include <QWebFrame>
  48 #include <QWebElement>
  49
  50 using namespace MessageViewer;
  51
  52 WebKitPartHtmlWriter::WebKitPartHtmlWriter( MailWebView * view, QObject * parent )
  53   : QObject( parent ), HtmlWriter(),
  54     mHtmlView( view ), mState( Ended )
  55 {
  56   assert( view );
  57 }
  58
  59 WebKitPartHtmlWriter::~WebKitPartHtmlWriter() {
  60 }
  61
  62 void WebKitPartHtmlWriter::begin( const QString & css ) {
  63   // The stylesheet is now included CSSHelper::htmlHead()
  64   Q_UNUSED( css );
  65   if ( mState != Ended ) {
  66     kWarning() << "begin() called on non-ended session!";
  67     reset();
  68   }
  69
  70   mEmbeddedPartMap.clear();
  71
  72   // clear the widget:
  73   mHtmlView->setUpdatesEnabled( false );
  74   mHtmlView->scrollUp( 10 );
  75 #ifndef KDEPIM_NO_WEBKIT
  76   // PENDING(marc) push into MailWebView
  77   mHtmlView->load( QUrl() );
  78 #endif
  79   mState = Begun;
  80 }
  81
  82 void WebKitPartHtmlWriter::end() {
  83   if ( mState != Begun ) {
  84     kWarning() << "Called on non-begun or queued session!";
  85   }
  86   mHtmlView->setHtml( mHtml, QUrl( "file:///" ) );
  87   mHtmlView->show();
  88   mHtml.clear();
  89
  90   resolveCidUrls();
  91
  92   mHtmlView->setUpdatesEnabled( true );
  93   mHtmlView->update();
  94   mState = Ended;
  95   emit finished();
  96 }
  97
  98 void WebKitPartHtmlWriter::reset() {
  99   if ( mState != Ended ) {
 100     mHtml.clear();
 101     mState = Begun; // don't run into end()'s warning
 102     end();
 103     mState = Ended;
 104   }
 105 }
 106
 107 void WebKitPartHtmlWriter::write( const QString & str ) {
 108   if ( mState != Begun ) {
 109     kWarning() << "Called in Ended or Queued state!";
 110   }
 111   mHtml.append( str );
 112 }
 113
 114 void WebKitPartHtmlWriter::queue( const QString & str ) {
 115   write( str );
 116 }
 117
 118 void WebKitPartHtmlWriter::flush() {
 119   mState = Begun; // don't run into end()'s warning
 120   end();
 121 }
 122
 123 void WebKitPartHtmlWriter::embedPart( const QByteArray & contentId,
 124                                       const QString & contentURL ) {
 125   mEmbeddedPartMap[QString(contentId)] = contentURL;
 126 }
 127
 128 void WebKitPartHtmlWriter::resolveCidUrls()
 129 {
 130   // FIXME: instead of patching around in the HTML source, this should
 131   // be replaced by a custom QNetworkAccessManager (for QWebView), or
 132   // virtual loadResource() (for QTextBrowser)
 133 #ifndef KDEPIM_NO_WEBKIT
 134   QWebElement root = mHtmlView->page()->mainFrame()->documentElement();
 135   QWebElementCollection images = root.findAll( "img" );
 136   for( QWebElementCollection::iterator it = images.begin(); it != images.end(); ++it )
 137   {
 138     KUrl url( (*it).attribute( "src" ) );
 139     if ( url.protocol() == QLatin1String( "cid" ) )
 140     {
 141       EmbeddedPartMap::const_iterator cit = mEmbeddedPartMap.constFind( url.path() );
 142       if ( cit != mEmbeddedPartMap.constEnd() ) {
 143         kDebug() << "Replacing" << url.prettyUrl() << "by" << cit.value();
 144         (*it).setAttribute( "src", cit.value() );
 145       }
 146     }
 147   }
 148 #endif
 149 }
 150
 151
 152 #include "webkitparthtmlwriter.moc"