Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdepim@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 187 insertions, 0 deletions

diff --git a/certmanager/lib/backends/qgpgme/qgpgmekeylistjob.cpp b/certmanager/lib/backends/qgpgme/qgpgmekeylistjob.cpp
new file mode 100644
index 000000000..9c87e3ef6
--- /dev/null
+++ b/certmanager/lib/backends/qgpgme/qgpgmekeylistjob.cpp
@@ -0,0 +1,187 @@
+/*
+    qgpgmekeylistjob.cpp
+
+    This file is part of libkleopatra, the KDE keymanagement library
+    Copyright (c) 2004 Klarälvdalens Datakonsult AB
+
+    Libkleopatra is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.
+
+    Libkleopatra is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of this program with any edition of
+    the Qt library by Trolltech AS, Norway (or with modified versions
+    of Qt that use the same license as Qt), and distribute linked
+    combinations including the two.  You must obey the GNU General
+    Public License in all respects for all of the code used other than
+    Qt.  If you modify this file, you may extend this exception to
+    your version of the file, but you are not obligated to do so.  If
+    you do not wish to do so, delete this exception statement from
+    your version.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "qgpgmekeylistjob.h"
+
+#include <qgpgme/eventloopinteractor.h>
+
+#include <gpgmepp/key.h>
+#include <gpgmepp/context.h>
+#include <gpgmepp/keylistresult.h>
+#include <gpg-error.h>
+
+#include <kmessagebox.h>
+#include <klocale.h>
+#include <kdebug.h>
+
+#include <qstringlist.h>
+
+#include <algorithm>
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+Kleo::QGpgMEKeyListJob::QGpgMEKeyListJob( GpgME::Context * context )
+  : KeyListJob( QGpgME::EventLoopInteractor::instance(), "Kleo::QGpgMEKeyListJob" ),
+    QGpgMEJob( this, context ),
+    mResult(), mSecretOnly( false )
+{
+  assert( context );
+}
+
+Kleo::QGpgMEKeyListJob::~QGpgMEKeyListJob() {
+}
+
+void Kleo::QGpgMEKeyListJob::setup( const QStringList & pats, bool secretOnly ) {
+  assert( !patterns() );
+
+  mSecretOnly = secretOnly;
+  setPatterns( pats );
+}
+
+GpgME::Error Kleo::QGpgMEKeyListJob::start( const QStringList & pats, bool secretOnly ) {
+  setup( pats, secretOnly );
+
+  hookupContextToEventLoopInteractor();
+  connect( QGpgME::EventLoopInteractor::instance(),
+	   SIGNAL(nextKeyEventSignal(GpgME::Context*,const GpgME::Key&)),
+	   SLOT(slotNextKeyEvent(GpgME::Context*,const GpgME::Key&)) );
+
+  // The communication channel between gpgme and gpgsm is limited in
+  // the number of patterns that can be transported, but they won't
+  // say to how much, so we need to find out ourselves if we get a
+  // LINE_TOO_LONG error back...
+
+  // We could of course just feed them single patterns, and that would
+  // probably be easier, but the performance penalty would currently
+  // be noticable.
+
+  while ( const GpgME::Error err = mCtx->startKeyListing( patterns(), mSecretOnly ) ) {
+    if ( err.code() == GPG_ERR_LINE_TOO_LONG ) {
+      setChunkSize( chunkSize()/2 );
+      if ( chunkSize() >= 1 ) {
+	kdDebug(5150) << "QGpgMEKeyListJob::start(): retrying keylisting with chunksize " << chunkSize() << endl;
+	continue;
+      }
+    }
+    deleteLater();
+    mResult = GpgME::KeyListResult( 0, err );
+    return err;
+  }
+  mResult = GpgME::KeyListResult( 0, 0 );
+  return 0;
+}
+
+GpgME::KeyListResult Kleo::QGpgMEKeyListJob::exec( const QStringList & pats, bool secretOnly, std::vector<GpgME::Key> & keys ) {
+  setup( pats, secretOnly );
+
+  // The communication channel between gpgme and gpgsm is limited in
+  // the number of patterns that can be transported, but they won't
+  // say to how much, so we need to find out ourselves if we get a
+  // LINE_TOO_LONG error back...
+
+  // We could of course just feed them single patterns, and that would
+  // probably be easier, but the performance penalty would currently
+  // be noticable.
+
+  for (;;) {
+    keys.clear();
+    mResult = attemptSyncKeyListing( keys );
+    if ( !mResult.error() || mResult.error().code() != GPG_ERR_LINE_TOO_LONG )
+      return mResult;
+    // got LINE_TOO_LONG, try a smaller chunksize:
+    setChunkSize( chunkSize()/2 );
+    if ( chunkSize() < 1 )
+      // chunks smaller than one can't be -> return the error.
+      return mResult;
+    kdDebug(5150) << "QGpgMEKeyListJob::exec(): retrying keylisting with chunksize " << chunkSize() << endl;
+  }
+  kdFatal(5150) << "QGpgMEKeyListJob::exec(): Oops, this is not supposed to happen!" << endl;
+  return GpgME::KeyListResult();
+}
+
+GpgME::KeyListResult Kleo::QGpgMEKeyListJob::attemptSyncKeyListing( std::vector<GpgME::Key> & keys ) {
+  GpgME::KeyListResult result;
+  for ( const char* * chunk = patterns() ; chunk ; chunk = nextChunk() ) {
+
+    if ( const GpgME::Error err = mCtx->startKeyListing( chunk, mSecretOnly ) )
+      return GpgME::KeyListResult( 0, err );
+
+    GpgME::Error err;
+    do
+      keys.push_back( mCtx->nextKey( err ) );
+    while ( !err );
+    keys.pop_back();
+    result.mergeWith( mCtx->endKeyListing() );
+    if ( result.error() )
+      break;
+  }
+  return result;
+}
+
+void Kleo::QGpgMEKeyListJob::slotNextKeyEvent( GpgME::Context * context, const GpgME::Key & key ) {
+  if ( context == mCtx )
+    emit nextKey( key );
+}
+
+void Kleo::QGpgMEKeyListJob::slotOperationDoneEvent( GpgME::Context * context, const GpgME::Error & ) {
+  if ( context != mCtx )
+    return;
+  mResult.mergeWith( mCtx->keyListResult() );
+  if ( !mResult.error() )
+    if ( const char* * chunk = nextChunk() ) {
+      if ( const GpgME::Error err = mCtx->startKeyListing( chunk, mSecretOnly ) )
+	mResult.mergeWith( GpgME::KeyListResult( 0, err ) );
+      else
+	return;
+    }
+  emit done();
+  emit result( mResult );
+  deleteLater();
+}
+
+void Kleo::QGpgMEKeyListJob::showErrorDialog( QWidget * parent, const QString & caption ) const {
+  if ( !mResult.error() || mResult.error().isCanceled() )
+    return;
+  const QString msg = i18n( "<qt><p>An error occurred while fetching "
+			    "the keys from the backend:</p>"
+			    "<p><b>%1</b></p></qt>" )
+    .arg( QString::fromLocal8Bit( mResult.error().asString() ) );
+  KMessageBox::error( parent, msg, caption );
+}
+
+#include "qgpgmekeylistjob.moc"